:root {
    --primary: #1E3A8A;
    --primary-light: #3B82F6;
    --primary-dark: #1E40AF;
    --accent: #D4A574;
    --accent-light: #E4C5A0;
    --bg: #F8FAFC;
    --bg-card: #FFFFFF;
    --text: #1E293B;
    --text-secondary: #64748B;
    --text-light: #94A3B8;
    --border: #E2E8F0;
    --success: #10B981;
    --error: #EF4444;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    line-height: 1.2;
}

.bg-decoration {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.3;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, #1E3A8A, #3B82F6);
    top: -200px;
    right: -100px;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #D4A574, #E4C5A0);
    top: 30%;
    left: -150px;
}

.orb-3 {
    width: 350px;
    height: 350px;
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    bottom: -100px;
    right: 20%;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.5);
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.logo-icon i {
    width: 22px;
    height: 22px;
}

.logo-text {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.hero {
    padding: 8rem 0 3rem;
    text-align: center;
}

.hero-content {
    max-width: 700px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(30, 58, 138, 0.08);
    color: var(--primary);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.hero-badge i {
    width: 18px;
    height: 18px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.converter-section {
    padding: 3rem 0;
}

.converter-card {
    background: var(--bg-card);
    border-radius: 24px;
    box-shadow: var(--shadow-xl);
    padding: 2.5rem;
    max-width: 680px;
    margin: 0 auto;
    border: 1px solid rgba(226, 232, 240, 0.5);
}

.converter-header {
    text-align: center;
    margin-bottom: 2rem;
}

.converter-header h2 {
    font-size: 1.75rem;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.converter-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.upload-zone {
    border: 2px dashed var(--border);
    border-radius: 20px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: linear-gradient(180deg, #FAFBFC 0%, #F1F5F9 100%);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary-light);
    background: linear-gradient(180deg, #EFF6FF 0%, #DBEAFE 100%);
    transform: translateY(-2px);
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.upload-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-bottom: 0.5rem;
}

.upload-icon i {
    width: 36px;
    height: 36px;
}

.upload-content h3 {
    font-size: 1.25rem;
    color: var(--text);
}

.upload-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.btn-select {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    border: none;
    padding: 0.875rem 2rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.btn-select:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-select:active {
    transform: translateY(0);
}

.btn-select i {
    width: 20px;
    height: 20px;
}

.file-info {
    margin-top: 1.5rem;
    background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
    border-radius: 16px;
    padding: 1.25rem;
    border: 1px solid rgba(212, 165, 116, 0.3);
}

.file-info-content {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.file-icon-wrapper {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #DC2626, #EF4444);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.file-icon-pdf {
    width: 24px;
    height: 24px;
}

.file-details {
    flex: 1;
    min-width: 0;
}

.file-details h4 {
    font-size: 1rem;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.25rem;
}

.file-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.meta-separator {
    color: var(--text-light);
}

.btn-remove {
    width: 36px;
    height: 36px;
    background: rgba(239, 68, 68, 0.1);
    border: none;
    border-radius: 10px;
    color: var(--error);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.btn-remove:hover {
    background: var(--error);
    color: white;
}

.btn-remove i {
    width: 18px;
    height: 18px;
}

.progress-section {
    margin-top: 1.5rem;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border);
    border-radius: 100px;
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 100px;
    width: 0%;
    transition: width 0.3s ease;
}

.progress-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
}

.progress-steps .step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.progress-steps .step-circle {
    width: 32px;
    height: 32px;
    background: var(--border);
    color: var(--text-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.progress-steps .step.active .step-circle {
    background: var(--primary);
    color: white;
}

.progress-steps .step.completed .step-circle {
    background: var(--success);
    color: white;
}

.progress-steps .step-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.progress-steps .step.active .step-label {
    color: var(--primary);
}

.progress-steps .step-line {
    width: 40px;
    height: 2px;
    background: var(--border);
    margin: 0 0.5rem;
    margin-bottom: 1.5rem;
}

.result-section {
    margin-top: 1.5rem;
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, #D1FAE5 0%, #A7F3D0 100%);
    border-radius: 20px;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.result-icon {
    width: 64px;
    height: 64px;
    background: var(--success);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: white;
}

.result-icon i {
    width: 32px;
    height: 32px;
}

.result-section h3 {
    font-size: 1.5rem;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.result-section p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.result-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    border: none;
    padding: 0.875rem 2rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-download i {
    width: 20px;
    height: 20px;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: white;
    color: var(--text);
    border: 1px solid var(--border);
    padding: 0.875rem 2rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.btn-secondary:hover {
    border-color: var(--primary-light);
    color: var(--primary);
    transform: translateY(-2px);
}

.btn-secondary i {
    width: 20px;
    height: 20px;
}

.error-section {
    margin-top: 1.5rem;
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, #FEE2E2 0%, #FECACA 100%);
    border-radius: 20px;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.error-icon {
    width: 64px;
    height: 64px;
    background: var(--error);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: white;
}

.error-icon i {
    width: 32px;
    height: 32px;
}

.error-section h3 {
    font-size: 1.5rem;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.error-section p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.hidden {
    display: none !important;
}

.features-section {
    padding: 6rem 0 3rem;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--text);
    margin-bottom: 0.75rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 2rem;
    border: 1px solid rgba(226, 232, 240, 0.5);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.1), rgba(212, 165, 116, 0.1));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    margin-bottom: 1.25rem;
}

.feature-icon i {
    width: 28px;
    height: 28px;
}

.feature-card h3 {
    font-size: 1.25rem;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.howto-section {
    padding: 3rem 0;
}

.steps-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.step-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    max-width: 260px;
    border: 1px solid rgba(226, 232, 240, 0.5);
    position: relative;
}

.step-number {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 0.875rem;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
}

.step-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.1), rgba(212, 165, 116, 0.1));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    margin: 0 auto 1rem;
}

.step-icon i {
    width: 32px;
    height: 32px;
}

.step-card h3 {
    font-size: 1.25rem;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.step-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.step-arrow {
    color: var(--text-light);
    display: flex;
    align-items: center;
}

.step-arrow i {
    width: 28px;
    height: 28px;
}

.notice-section {
    padding: 3rem 0 5rem;
}

.notice-card {
    background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 100%);
    border-radius: 20px;
    padding: 2rem;
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.notice-icon {
    width: 48px;
    height: 48px;
    background: var(--primary);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.notice-icon i {
    width: 24px;
    height: 24px;
}

.notice-content h3 {
    font-size: 1.25rem;
    color: var(--text);
    margin-bottom: 0.75rem;
}

.notice-content ul {
    list-style: none;
    padding: 0;
}

.notice-content li {
    color: var(--text-secondary);
    font-size: 0.95rem;
    padding-left: 1.25rem;
    position: relative;
    margin-bottom: 0.5rem;
}

.notice-content li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

.footer {
    background: linear-gradient(180deg, transparent 0%, rgba(30, 58, 138, 0.05) 100%);
    padding: 3rem 1.5rem;
    border-top: 1px solid var(--border);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--text);
}

.footer-logo .logo-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.footer-logo .logo-icon i {
    width: 18px;
    height: 18px;
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
    }

    .nav-link {
        font-size: 0.875rem;
    }

    .hero {
        padding: 6rem 0 2rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .converter-card {
        padding: 1.5rem;
    }

    .upload-zone {
        padding: 2rem 1rem;
    }

    .upload-icon {
        width: 56px;
        height: 56px;
    }

    .upload-icon i {
        width: 28px;
        height: 28px;
    }

    .features-section {
        padding: 4rem 0 2rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .steps-container {
        flex-direction: column;
        gap: 2rem;
    }

    .step-arrow {
        transform: rotate(90deg);
    }

    .notice-card {
        flex-direction: column;
    }

    .notice-icon {
        margin: 0 auto;
    }

    .result-actions {
        flex-direction: column;
    }

    .btn-download,
    .btn-secondary {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .progress-steps .step-line {
        width: 20px;
    }

    .progress-steps .step-label {
        font-size: 0.7rem;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content,
.converter-card,
.feature-card,
.step-card,
.notice-card {
    animation: fadeInUp 0.6s ease forwards;
}

.feature-card:nth-child(2) {
    animation-delay: 0.1s;
}

.feature-card:nth-child(3) {
    animation-delay: 0.2s;
}

.feature-card:nth-child(4) {
    animation-delay: 0.3s;
}

.feature-card:nth-child(5) {
    animation-delay: 0.4s;
}

.feature-card:nth-child(6) {
    animation-delay: 0.5s;
}

/* ============ 首页工具箱样式 ============ */

.hero-search {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    max-width: 480px;
    margin: 2rem auto 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 0.875rem 1.25rem;
    box-shadow: var(--shadow);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.hero-search:focus-within {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.hero-search i {
    width: 22px;
    height: 22px;
    color: var(--text-light);
    flex-shrink: 0;
}

.hero-search input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-size: 1rem;
    color: var(--text);
    font-family: inherit;
}

.hero-search input::placeholder {
    color: var(--text-light);
}

.hero-search-clear {
    border: none;
    background: rgba(0,0,0,0.06);
    color: var(--text-secondary);
    width: 28px;
    height: 28px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.2s ease;
}
.hero-search-clear:hover { background: rgba(239,68,68,0.15); color: var(--error); }

/* 分类筛选栏 */
.tools-filter-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    padding: 0.75rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
}
.filter-chip {
    padding: 0.5rem 1.125rem;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    border-radius: 10px;
    font-size: 0.8125rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
    white-space: nowrap;
    will-change: transform;
    -webkit-tap-highlight-color: transparent;
}
.filter-chip:hover {
    border-color: var(--primary-light);
    color: var(--primary);
    transform: translateY(-2px);
}
.filter-chip:active {
    transform: translateY(0) scale(0.95);
    transition: transform 0.08s ease-out;
}
.filter-chip.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(59,130,246,0.25);
    transform: translateY(-1px);
}
.search-result-count {
    margin-left: auto;
    color: var(--text-light);
    font-size: 0.8125rem;
    font-weight: 500;
}

/* 无结果提示 */
.no-result-tip {
    text-align: center;
    padding: 3.5rem 1rem;
    color: var(--text-light);
}
.no-result-tip i {
    color: var(--text-light);
    margin-bottom: 0.75rem;
}
.no-result-tip p {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.375rem;
}
.no-result-tip span {
    font-size: 0.8125rem;
    color: var(--text-light);
}

.tools-section {
    padding: 3rem 0;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.tool-card {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    background: var(--bg-card);
    border-radius: 20px;
    padding: 1.5rem;
    border: 1px solid rgba(226, 232, 240, 0.5);
    text-decoration: none;
    color: inherit;
    position: relative;
    overflow: hidden;
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1),
                box-shadow 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                border-color 0.3s ease;
    cursor: pointer;
    will-change: transform;
    -webkit-tap-highlight-color: transparent;
}

.tool-card:not(.tool-card-coming):hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: rgba(59, 130, 246, 0.3);
}

.tool-card:not(.tool-card-coming):active {
    transform: translateY(-2px) scale(0.98);
    transition: transform 0.1s ease-out;
}

/* 涟漪效果 */
.tool-card .ripple {
    position: absolute;
    border-radius: 50%;
    transform: scale(0);
    animation: rippleExpand 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    pointer-events: none;
    z-index: 0;
}
@keyframes rippleExpand {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

.tool-card-coming {
    cursor: not-allowed;
    opacity: 0.75;
}

/* 卡片上的收藏按钮 */
.tool-fav-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    width: 30px;
    height: 30px;
    border: none;
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.04);
    color: var(--text-light);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.2s ease;
    z-index: 2;
}
.tool-card:hover .tool-fav-btn { opacity: 1; }
.tool-fav-btn:hover { background: rgba(245, 158, 11, 0.15); color: #F59E0B; }
.tool-fav-btn.active {
    opacity: 1;
    color: #F59E0B;
    background: rgba(245, 158, 11, 0.12);
}

/* 快捷区（最近使用 + 我的收藏） */
.shortcuts-section {
    padding: 1rem 0 0;
}
.shortcut-block {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.25rem;
    margin-bottom: 0.75rem;
    box-shadow: var(--shadow-sm);
}
.shortcut-header h3 {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.75rem;
}
.shortcut-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.shortcut-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.875rem;
    background: rgba(99, 102, 241, 0.06);
    border: 1px solid rgba(99, 102, 241, 0.15);
    border-radius: 10px;
    color: var(--text);
    font-size: 0.8125rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
    will-change: transform;
    -webkit-tap-highlight-color: transparent;
}
.shortcut-chip:hover {
    background: rgba(99, 102, 241, 0.12);
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateY(-2px);
}
.shortcut-chip:active {
    transform: translateY(0) scale(0.95);
    transition: transform 0.08s ease-out;
}
.shortcut-chip .tool-icon {
    width: 22px;
    height: 22px;
    border-radius: 6px;
    font-size: 0.75rem;
}
.shortcut-chip .tool-icon i {
    width: 14px;
    height: 14px;
}

/* 游客提示 */
.guest-hint {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.25rem;
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.18);
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 0.8125rem;
}
.guest-hint i { color: #F59E0B; flex-shrink: 0; }
.guest-login-btn {
    margin-left: auto;
    padding: 0.375rem 0.875rem;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
}

.tool-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    will-change: transform;
}

.tool-card:hover .tool-icon {
    transform: scale(1.12) rotate(-5deg);
}

.tool-icon i {
    width: 28px;
    height: 28px;
    transition: transform 0.3s ease;
}

.tool-info {
    flex: 1;
    min-width: 0;
}

.tool-info h3 {
    font-size: 1.125rem;
    color: var(--text);
    margin-bottom: 0.25rem;
}

.tool-info p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

.tool-tag {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 50px;
    background: rgba(30, 58, 138, 0.08);
    color: var(--primary);
}

.tool-card-coming .tool-tag {
    background: rgba(148, 163, 184, 0.15);
    color: var(--text-secondary);
}

.tool-arrow {
    color: var(--text-light);
    display: flex;
    align-items: center;
    flex-shrink: 0;
    transition: color 0.3s ease, transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    will-change: transform;
}

.tool-card:not(.tool-card-coming):hover .tool-arrow {
    color: var(--primary);
    transform: translateX(6px);
}

.tool-arrow i {
    width: 22px;
    height: 22px;
}

.about-section {
    padding: 3rem 0 5rem;
}

.about-card {
    background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 100%);
    border-radius: 20px;
    padding: 2.5rem;
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.about-icon {
    width: 56px;
    height: 56px;
    background: var(--primary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.about-icon i {
    width: 28px;
    height: 28px;
}

.about-content h3 {
    font-size: 1.5rem;
    color: var(--text);
    margin-bottom: 0.75rem;
}

.about-content p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 0.5rem;
}

@media (max-width: 768px) {
    .tools-grid {
        grid-template-columns: 1fr;
    }

    .about-card {
        flex-direction: column;
        padding: 2rem 1.5rem;
    }

    .about-icon {
        margin: 0 auto;
    }

    .hero-search {
        max-width: 100%;
    }
}

/* ============ 图片压缩页面样式 ============ */

.compress-panel {
    margin-top: 1.5rem;
}

.preview-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.preview-box {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
}

.preview-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
}

.preview-tag {
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 50px;
}

.original-tag {
    background: rgba(148, 163, 184, 0.15);
    color: var(--text-secondary);
}

.compressed-tag {
    background: rgba(124, 58, 237, 0.1);
    color: #7C3AED;
}

.preview-size {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.preview-image-wrapper {
    padding: 1rem;
    min-height: 180px;
    max-height: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.preview-image-wrapper img {
    max-width: 100%;
    max-height: 280px;
    object-fit: contain;
    border-radius: 8px;
}

.compress-controls {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.control-group {
    margin-bottom: 1.5rem;
}

.control-group:last-child {
    margin-bottom: 0;
}

.control-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text);
}

.control-value {
    font-size: 0.875rem;
    color: var(--primary);
    font-weight: 600;
}

.slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: var(--border);
    border-radius: 100px;
    outline: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, #7C3AED, #A855F7);
    border-radius: 50%;
    cursor: pointer;
    border: 3px solid white;
    box-shadow: var(--shadow);
    transition: transform 0.2s ease;
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: linear-gradient(135deg, #7C3AED, #A855F7);
    border-radius: 50%;
    cursor: pointer;
    border: 3px solid white;
    box-shadow: var(--shadow);
}

.format-options {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.format-btn {
    padding: 0.5rem 1.25rem;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-secondary);
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.format-btn:hover {
    border-color: #A855F7;
    color: #7C3AED;
}

.format-btn.active {
    background: linear-gradient(135deg, #7C3AED, #A855F7);
    color: white;
    border-color: transparent;
}

.compress-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-item {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1rem;
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.stat-value {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    font-family: 'Space Grotesk', sans-serif;
}

.compress-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .preview-container {
        grid-template-columns: 1fr;
    }

    .compress-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .compress-actions {
        flex-direction: column;
    }

    .compress-actions .btn-download,
    .compress-actions .btn-secondary {
        width: 100%;
        justify-content: center;
    }
}

/* ============ 二维码生成页面样式 ============ */

.qr-card {
    max-width: 1100px;
    margin: 0 auto;
}

.qr-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.qr-input-panel {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.converter-header-left h2 {
    font-size: 1.5rem;
    color: var(--text);
    margin-bottom: 0.25rem;
}

.converter-header-left p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.qr-type-tabs {
    display: flex;
    gap: 0.5rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 0.375rem;
}

.qr-tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.625rem 0.75rem;
    background: transparent;
    border: none;
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.qr-tab i {
    width: 16px;
    height: 16px;
}

.qr-tab:hover {
    color: var(--text);
}

.qr-tab.active {
    background: linear-gradient(135deg, #059669, #10B981);
    color: white;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.qr-form {
    position: relative;
}

.qr-form-panel {
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
}

.qr-form-panel.hidden {
    display: none;
}

#qrContent {
    width: 100%;
    min-height: 120px;
    padding: 0.875rem 1rem;
    border: 1.5px solid var(--border);
    border-radius: 14px;
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--text);
    background: var(--bg-card);
    resize: vertical;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

#qrContent:focus {
    border-color: #10B981;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

.char-counter {
    text-align: right;
    font-size: 0.8rem;
    color: var(--text-light);
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.form-row label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text);
}

.form-row input,
.form-row select {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--text);
    background: var(--bg-card);
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-row input:focus,
.form-row select:focus {
    border-color: #10B981;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

.qr-settings {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.25rem;
}

.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.setting-row > label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text);
    flex-shrink: 0;
}

.setting-options {
    display: flex;
    gap: 0.375rem;
}

.opt-btn {
    padding: 0.375rem 0.875rem;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-secondary);
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.opt-btn:hover {
    border-color: #10B981;
    color: #059669;
}

.opt-btn.active {
    background: linear-gradient(135deg, #059669, #10B981);
    color: white;
    border-color: transparent;
}

.color-row .color-options {
    display: flex;
    gap: 0.75rem;
}

.color-field {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.color-field span {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.color-field input[type="color"] {
    width: 36px;
    height: 28px;
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    padding: 2px;
    background: var(--bg-card);
}

.color-field input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-field input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 4px;
}

.btn-generate {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    background: linear-gradient(135deg, #059669, #10B981);
    color: white;
    border: none;
    border-radius: 14px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-generate:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(16, 185, 129, 0.4);
}

.btn-generate i {
    width: 20px;
    height: 20px;
}

.qr-preview-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.qr-preview-container {
    width: 100%;
    aspect-ratio: 1;
    max-width: 320px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.qr-preview-container canvas {
    max-width: 100%;
    max-height: 100%;
    display: block;
}

.qr-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    color: var(--text-light);
}

.qr-placeholder.hidden {
    display: none;
}

.qr-placeholder i {
    width: 48px;
    height: 48px;
    opacity: 0.4;
}

.qr-placeholder p {
    font-size: 0.9rem;
}

.qr-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    width: 100%;
    max-width: 320px;
}

.info-row {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0.625rem;
    text-align: center;
}

.info-row span {
    display: block;
    font-size: 0.75rem;
}

.info-row span:first-child {
    color: var(--text-secondary);
    margin-bottom: 0.125rem;
}

.info-row span:last-child {
    color: var(--text);
    font-weight: 600;
}

.qr-actions {
    display: flex;
    gap: 0.75rem;
    width: 100%;
    max-width: 320px;
}

.qr-actions.hidden {
    display: none;
}

.qr-actions .btn-download,
.qr-actions .btn-secondary {
    flex: 1;
    justify-content: center;
}

@media (max-width: 768px) {
    .qr-main {
        grid-template-columns: 1fr;
    }

    .qr-preview-panel {
        order: -1;
    }

    .qr-preview-container {
        max-width: 240px;
    }
}

/* ============ PDF压缩页面样式 ============ */

.file-info-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1rem 1.25rem;
    margin-bottom: 1.25rem;
}

.file-info-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #0891B2, #06B6D4);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.file-info-icon i {
    width: 24px;
    height: 24px;
}

.file-info-details {
    flex: 1;
    min-width: 0;
}

.file-info-details h4 {
    font-size: 0.95rem;
    color: var(--text);
    margin-bottom: 0.25rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-info-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.meta-sep {
    opacity: 0.5;
}

.btn-icon {
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(239, 68, 68, 0.1);
    color: #EF4444;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.btn-icon:hover {
    background: rgba(239, 68, 68, 0.15);
    transform: scale(1.05);
}

.btn-icon i {
    width: 18px;
    height: 18px;
}

.compress-levels {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
}

.level-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.375rem;
    padding: 1rem 0.75rem;
    background: var(--bg);
    border: 2px solid var(--border);
    border-radius: 14px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.level-btn i {
    width: 22px;
    height: 22px;
}

.level-btn span {
    font-size: 0.875rem;
    font-weight: 600;
}

.level-btn small {
    font-size: 0.75rem;
    opacity: 0.7;
}

.level-btn:hover {
    border-color: #06B6D4;
    color: #0891B2;
}

.level-btn.active {
    border-color: #0891B2;
    background: linear-gradient(135deg, rgba(8, 145, 178, 0.1), rgba(6, 182, 212, 0.1));
    color: #0891B2;
}

.compress-controls {
    margin-bottom: 1.5rem;
}

.btn-process {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 1rem;
    color: white;
    border: none;
    border-radius: 16px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    box-shadow: 0 4px 14px rgba(6, 182, 212, 0.3);
}

.btn-process:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.4);
}

.btn-process:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-process i {
    width: 22px;
    height: 22px;
}

.progress-section {
    margin-top: 1.5rem;
}

.progress-bar {
    width: 100%;
    height: 10px;
    background: var(--bg);
    border-radius: 100px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #0891B2, #06B6D4);
    border-radius: 100px;
    transition: width 0.3s ease;
}

.progress-text {
    text-align: center;
    margin-top: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.result-section {
    margin-top: 1.5rem;
}

.result-card {
    background: linear-gradient(135deg, rgba(8, 145, 178, 0.08), rgba(6, 182, 212, 0.08));
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    margin-bottom: 1.25rem;
}

.result-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #0891B2, #06B6D4);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin: 0 auto 1rem;
}

.result-icon i {
    width: 32px;
    height: 32px;
}

.result-card h3 {
    font-size: 1.35rem;
    color: var(--text);
    margin-bottom: 1.25rem;
}

.result-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.result-stat {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 0.875rem;
    text-align: center;
}

.result-stat.highlight {
    background: linear-gradient(135deg, #0891B2, #06B6D4);
    border-color: transparent;
}

.result-stat.highlight .stat-label,
.result-stat.highlight .stat-value {
    color: white;
}

.result-stat .stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.result-stat .stat-value {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    font-family: 'Space Grotesk', sans-serif;
}

.result-actions {
    display: flex;
    gap: 1rem;
}

.result-actions .btn-download,
.result-actions .btn-secondary {
    flex: 1;
    justify-content: center;
}

@media (max-width: 768px) {
    .compress-levels {
        grid-template-columns: 1fr;
    }

    .result-stats {
        grid-template-columns: 1fr 1fr;
    }

    .result-actions {
        flex-direction: column;
    }

    .result-actions .btn-download,
    .result-actions .btn-secondary {
        width: 100%;
    }
}

/* ============ 颜色选择器页面样式 ============ */

.color-picker-main {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 2rem;
}

.color-preview-panel {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.color-preview-large {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--border);
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.preview-checker {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(45deg, #E5E7EB 25%, transparent 25%),
        linear-gradient(-45deg, #E5E7EB 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #E5E7EB 75%),
        linear-gradient(-45deg, transparent 75%, #E5E7EB 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0;
    opacity: 0.3;
}

.preview-color {
    position: absolute;
    inset: 0;
    background: #1E293B;
}

.preview-hex {
    position: relative;
    z-index: 1;
    padding: 0.5rem 1.25rem;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    font-family: 'Space Grotesk', monospace;
    font-size: 1.125rem;
    font-weight: 600;
    border-radius: 12px 12px 0 0;
    margin-bottom: 0;
}

.color-input-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.color-input-row label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text);
}

input[type="color"]#colorPicker {
    width: 48px;
    height: 36px;
    border: 2px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    padding: 2px;
    background: var(--bg-card);
}

input[type="color"]#colorPicker::-webkit-color-swatch-wrapper {
    padding: 0;
}

input[type="color"]#colorPicker::-webkit-color-swatch {
    border: none;
    border-radius: 6px;
}

.color-presets h4 {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 0.75rem;
}

.preset-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 0.5rem;
}

.preset-color {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 10px;
    cursor: pointer;
    border: 2px solid rgba(0, 0, 0, 0.05);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.preset-color:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.color-formats-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.format-group {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1rem 1.25rem;
}

.format-label {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.format-label h3 {
    font-size: 1rem;
    color: var(--text);
}

.format-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.format-input-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.format-input-row input[type="text"],
.format-input-row input[type="number"] {
    flex: 1;
    padding: 0.5rem 0.75rem;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    font-size: 0.9rem;
    font-family: 'Space Grotesk', monospace;
    color: var(--text);
    background: var(--bg-card);
    outline: none;
    transition: border-color 0.2s ease;
}

.format-input-row input:focus {
    border-color: #F59E0B;
}

.format-input-row input[type="number"] {
    font-family: inherit;
}

.copy-btn {
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(220, 38, 38, 0.08);
    color: #DC2626;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.copy-btn:hover {
    background: rgba(220, 38, 38, 0.15);
    transform: scale(1.05);
}

.copy-btn i {
    width: 18px;
    height: 18px;
}

.result-row {
    margin-top: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--bg-card);
    border-radius: 8px;
    font-family: 'Space Grotesk', monospace;
    font-size: 0.85rem;
    color: var(--text-secondary);
    word-break: break-all;
}

.rgb-inputs,
.hsl-inputs {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.rgb-input,
.hsl-input {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex: 1;
}

.rgb-input label,
.hsl-input label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    width: 18px;
}

.rgb-input input,
.hsl-input input {
    width: 100%;
    padding: 0.4rem 0.5rem;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    font-size: 0.85rem;
    font-family: inherit;
    color: var(--text);
    background: var(--bg-card);
    outline: none;
    transition: border-color 0.2s ease;
}

.rgb-input input:focus,
.hsl-input input:focus {
    border-color: #F59E0B;
}

.unit {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.color-shades-section {
    margin-top: 2rem;
}

.shades-header h3 {
    font-size: 1.125rem;
    color: var(--text);
    margin-bottom: 0.25rem;
}

.shades-header p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.shades-grid {
    display: grid;
    grid-template-columns: repeat(11, 1fr);
    gap: 0.375rem;
}

.shade-item {
    aspect-ratio: 1;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    font-family: 'Space Grotesk', sans-serif;
}

.shade-item:hover {
    transform: scale(1.08);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.shade-label {
    font-size: 0.7rem;
    font-weight: 600;
}

.shade-hex {
    font-size: 0.6rem;
    opacity: 0.8;
}

.color-info-section {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

.info-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1rem;
}

.info-card > i {
    width: 36px;
    height: 36px;
    color: #F59E0B;
    background: rgba(245, 158, 11, 0.1);
    padding: 8px;
    border-radius: 10px;
    flex-shrink: 0;
}

.info-card h4 {
    font-size: 0.85rem;
    color: var(--text);
    margin-bottom: 0.125rem;
}

.info-card span {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text);
    font-family: 'Space Grotesk', sans-serif;
}

@media (max-width: 768px) {
    .color-picker-main {
        grid-template-columns: 1fr;
    }

    .color-preview-panel {
        order: -1;
    }

    .color-preview-large {
        max-width: 280px;
        margin: 0 auto;
    }

    .shades-grid {
        grid-template-columns: repeat(6, 1fr);
    }

    .shade-item:nth-child(11) {
        display: none;
    }

    .color-info-section {
        grid-template-columns: 1fr;
    }
}

/* ============ 文件格式转换器页面样式 ============ */

.converter-type-tabs {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    background: var(--bg);
    border-radius: 16px;
    padding: 6px;
    border: 1px solid var(--border);
}

.conv-tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.conv-tab:hover {
    color: var(--text);
}

.conv-tab.active {
    background: linear-gradient(135deg, #7C3AED, #6366F1);
    color: white;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
}

.conv-tab i {
    width: 18px;
    height: 18px;
}

.converter-type-panel {
    display: block;
}

.converter-type-panel.hidden,
.text-preview-area.hidden {
    display: none;
}

.convert-file-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    margin-bottom: 1.25rem;
}

.file-info-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #7C3AED, #6366F1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.file-info-icon i {
    width: 24px;
    height: 24px;
}

.file-info-details {
    flex: 1;
    min-width: 0;
}

.file-info-details h4 {
    font-size: 1rem;
    color: var(--text);
    margin-bottom: 0.25rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-info-meta {
    display: flex;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.meta-sep {
    color: var(--border);
}

.preview-thumb {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border);
    flex-shrink: 0;
}

.preview-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.convert-settings {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.setting-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.setting-value {
    font-weight: 600;
    color: var(--text);
    font-family: 'Space Grotesk', sans-serif;
}

.format-target-options {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.target-format-btn {
    padding: 0.5rem 0.875rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.target-format-btn:hover:not(:disabled) {
    border-color: #6366F1;
    color: #6366F1;
}

.target-format-btn.active {
    background: linear-gradient(135deg, #7C3AED, #6366F1);
    border-color: transparent;
    color: white;
}

.target-format-btn:disabled {
    cursor: not-allowed;
}

.text-preview-area {
    margin-bottom: 1.25rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

.text-preview-area textarea {
    width: 100%;
    min-height: 200px;
    padding: 1rem;
    border: none;
    resize: vertical;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--text);
    background: var(--bg);
    outline: none;
}

.btn-select {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    background: linear-gradient(135deg, #7C3AED, #6366F1);
    color: white;
    border: none;
    border-radius: 14px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    box-shadow: 0 4px 14px rgba(124, 58, 237, 0.25);
}

.btn-select:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(124, 58, 237, 0.35);
}

.btn-select i {
    width: 20px;
    height: 20px;
}

.btn-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.btn-icon:hover {
    background: #FEF2F2;
    border-color: #FECACA;
    color: #DC2626;
}

.btn-icon i {
    width: 18px;
    height: 18px;
}

.slider {
    width: 100%;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border);
    border-radius: 4px;
    outline: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--slider-color, #6366F1);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s ease;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--slider-color, #6366F1);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.error-section {
    text-align: center;
    padding: 2rem;
}

.error-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1rem;
    background: linear-gradient(135deg, #FEE2E2, #FECACA);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #DC2626;
}

.error-icon i {
    width: 32px;
    height: 32px;
}

.error-section h3 {
    font-size: 1.25rem;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.error-section p {
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

#imageResultSection .btn-download,
#textResultSection .btn-download {
    background: linear-gradient(135deg, #7C3AED, #6366F1);
}

@media (max-width: 768px) {
    .converter-type-tabs {
        flex-direction: column;
    }

    .conv-tab {
        padding: 0.625rem;
        font-size: 0.85rem;
    }

    .conv-tab span {
        display: none;
    }

    .format-target-options {
        gap: 0.375rem;
    }

    .target-format-btn {
        padding: 0.375rem 0.625rem;
        font-size: 0.8rem;
    }

    .result-actions {
        flex-direction: column;
    }

    .result-actions .btn-download,
    .result-actions .btn-secondary {
        width: 100%;
    }
}

/* ============ JSON 格式化页面样式 ============ */

.json-editor-section {
    padding: 2rem 0;
}

.json-editor-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.json-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 0.75rem;
}

.json-toolbar-left,
.json-toolbar-right {
    display: flex;
    gap: 0.375rem;
    align-items: center;
    flex-wrap: wrap;
}

.json-tool-btn {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.json-tool-btn:hover {
    background: var(--bg-card);
    color: var(--text);
    border-color: var(--border);
}

.json-tool-btn.active {
    background: linear-gradient(135deg, #4338CA, #6366F1);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(67, 56, 202, 0.25);
}

.json-tool-btn i {
    width: 16px;
    height: 16px;
}

.json-tool-btn-secondary {
    background: var(--bg-card);
    border-color: var(--border);
    color: var(--text-secondary);
}

.json-tool-btn-secondary:hover {
    color: #6366F1;
    border-color: #6366F1;
}

.json-tool-btn-danger {
    background: var(--bg-card);
    border-color: var(--border);
    color: var(--text-secondary);
}

.json-tool-btn-danger:hover {
    background: #FEF2F2;
    border-color: #FECACA;
    color: #DC2626;
}

.json-select {
    padding: 0.5rem 0.75rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 0.85rem;
    color: var(--text);
    font-family: inherit;
    cursor: pointer;
    outline: none;
}

.json-select:focus {
    border-color: #6366F1;
}

.json-editor-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    min-height: 400px;
}

.json-input-panel,
.json-output-panel {
    display: flex;
    flex-direction: column;
    min-height: 400px;
}

.json-input-panel {
    border-right: 1px solid var(--border);
}

.json-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
}

.json-panel-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
}

.json-panel-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.json-stats {
    font-size: 0.75rem;
    color: var(--text-light);
}

.json-mini-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.625rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: inherit;
}

.json-mini-btn:hover {
    background: var(--bg-card);
    color: #6366F1;
    border-color: #6366F1;
}

.json-mini-btn i {
    width: 14px;
    height: 14px;
}

.json-textarea {
    flex: 1;
    padding: 1rem;
    border: none;
    outline: none;
    resize: none;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg-card);
    min-height: 350px;
    tab-size: 4;
}

.json-textarea::placeholder {
    color: var(--text-light);
}

.json-output {
    background: #0F172A;
    color: #E2E8F0;
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-y: auto;
}

.json-output::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.json-output::-webkit-scrollbar-track {
    background: #1E293B;
}

.json-output::-webkit-scrollbar-thumb {
    background: #475569;
    border-radius: 4px;
}

.json-output::-webkit-scrollbar-thumb:hover {
    background: #64748B;
}

.json-key {
    color: #7DD3FC;
}

.json-string {
    color: #86EFAC;
}

.json-boolean {
    color: #FBBF24;
}

.json-number {
    color: #FCA5A5;
}

.json-validation-status {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--bg);
    border-top: 1px solid var(--border);
}

.json-validation-status.hidden {
    display: none;
}

.status-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.status-icon i {
    width: 22px;
    height: 22px;
}

.status-valid {
    background: rgba(16, 185, 129, 0.1);
    color: #10B981;
}

.status-invalid {
    background: rgba(239, 68, 68, 0.1);
    color: #EF4444;
}

.status-content h4 {
    font-size: 0.95rem;
    margin-bottom: 0.125rem;
}

.status-content p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.json-stats-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-top: 1.5rem;
}

.json-stat-card {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 1rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
}

.json-stat-card .stat-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.json-stat-card .stat-icon i {
    width: 22px;
    height: 22px;
}

.json-stat-card .stat-info {
    display: flex;
    flex-direction: column;
}

.json-stat-card .stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.125rem;
}

.json-stat-card .stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    font-family: 'Space Grotesk', sans-serif;
}

.json-toast {
    position: fixed;
    top: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: #0F172A;
    color: white;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    z-index: 10000;
    animation: toastSlideDown 0.3s ease;
}

.json-toast.hidden {
    display: none;
}

.json-toast i {
    width: 20px;
    height: 20px;
    color: #10B981;
}

@keyframes toastSlideDown {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

@media (max-width: 768px) {
    .json-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .json-toolbar-left,
    .json-toolbar-right {
        justify-content: center;
    }

    .json-editor-body {
        grid-template-columns: 1fr;
    }

    .json-input-panel {
        border-right: none;
        border-bottom: 1px solid var(--border);
    }

    .json-textarea {
        min-height: 250px;
    }

    .json-stats-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .json-tool-btn span {
        display: none;
    }
}

/* ============ AI 对话页面样式 ============ */

.ai-chat-section {
    padding: 1rem 0 2rem;
}

.ai-chat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: 600px;
}

.ai-sidebar {
    background: var(--bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    height: 600px;
}

.ai-sidebar-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}

.ai-new-chat-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.75rem 1rem;
    background: linear-gradient(135deg, #0891B2, #06B6D4);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    box-shadow: 0 4px 14px rgba(8, 145, 178, 0.25);
}

.ai-new-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(8, 145, 178, 0.35);
}

.ai-new-chat-btn i {
    width: 18px;
    height: 18px;
}

.ai-history-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.ai-history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ai-clear-btn {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: 8px;
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.15s ease;
}

.ai-clear-btn:hover {
    background: #FEF2F2;
    color: #DC2626;
}

.ai-clear-btn i {
    width: 16px;
    height: 16px;
}

.ai-history-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 0.5rem;
}

.ai-history-list::-webkit-scrollbar {
    width: 6px;
}

.ai-history-list::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

.ai-history-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    color: var(--text-light);
    text-align: center;
}

.ai-history-empty i {
    width: 32px;
    height: 32px;
    margin-bottom: 0.5rem;
    opacity: 0.5;
}

.ai-history-empty p {
    font-size: 0.85rem;
}

.ai-history-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 0.75rem;
    border-radius: 10px;
    cursor: pointer;
    transition: background 0.15s ease;
    position: relative;
    group: true;
}

.ai-history-item:hover {
    background: var(--bg-card);
}

.ai-history-item.active {
    background: linear-gradient(135deg, rgba(8, 145, 178, 0.1), rgba(6, 182, 212, 0.1));
    border: 1px solid rgba(6, 182, 212, 0.2);
}

.ai-history-item-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.ai-history-item-title {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ai-history-item-time {
    font-size: 0.7rem;
    color: var(--text-light);
}

.ai-history-delete {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--text-light);
    cursor: pointer;
    opacity: 0;
    transition: all 0.15s ease;
}

.ai-history-item:hover .ai-history-delete {
    opacity: 1;
}

.ai-history-delete:hover {
    background: #FEF2F2;
    color: #DC2626;
}

.ai-history-delete i {
    width: 14px;
    height: 14px;
}

.ai-sidebar-footer {
    padding: 0.75rem;
    border-top: 1px solid var(--border);
}

.ai-settings-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.625rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.ai-settings-btn:hover {
    color: #06B6D4;
    border-color: #06B6D4;
}

.ai-settings-btn i {
    width: 16px;
    height: 16px;
}

.ai-main {
    display: flex;
    flex-direction: column;
    height: 600px;
}

.ai-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.ai-messages::-webkit-scrollbar {
    width: 8px;
}

.ai-messages::-webkit-scrollbar-track {
    background: transparent;
}

.ai-messages::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.ai-message {
    display: flex;
    gap: 0.75rem;
    max-width: 85%;
    animation: aiFadeIn 0.3s ease;
}

@keyframes aiFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.ai-user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.ai-bot {
    align-self: flex-start;
}

.ai-avatar {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.ai-avatar i {
    width: 18px;
    height: 18px;
    color: white;
}

.ai-avatar-user {
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
}

.ai-message-content {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    max-width: 100%;
}

.ai-user .ai-message-content {
    align-items: flex-end;
}

.ai-message-bubble {
    padding: 0.875rem 1rem;
    border-radius: 16px;
    font-size: 0.9rem;
    line-height: 1.6;
    word-wrap: break-word;
    white-space: pre-wrap;
}

.ai-user .ai-message-bubble {
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    color: white;
    border-bottom-right-radius: 4px;
}

.ai-bot .ai-message-bubble {
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text);
    border-bottom-left-radius: 4px;
}

.ai-bot-bubble {
    background: var(--bg) !important;
    border: 1px solid var(--border) !important;
}

.ai-message-time {
    font-size: 0.7rem;
    color: var(--text-light);
}

.ai-message-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.25rem;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.ai-message-content:hover .ai-message-actions {
    opacity: 1;
}

.ai-copy-msg {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.15s ease;
    padding: 0;
}

.ai-copy-msg:hover {
    color: var(--primary);
    border-color: var(--primary-light);
    background: rgba(8, 145, 178, 0.08);
}

.ai-copy-msg.copied {
    color: #10B981;
    border-color: #10B981;
}

.ai-copy-msg i {
    width: 14px;
    height: 14px;
}

/* Markdown styles */
.ai-message-bubble h1,
.ai-message-bubble h2,
.ai-message-bubble h3,
.ai-message-bubble h4,
.ai-message-bubble h5,
.ai-message-bubble h6 {
    margin: 0.875rem 0 0.5rem;
    font-weight: 600;
    line-height: 1.3;
}

.ai-message-bubble h1 { font-size: 1.6rem; border-bottom: 1px solid var(--border); padding-bottom: 0.3rem; }
.ai-message-bubble h2 { font-size: 1.35rem; border-bottom: 1px solid var(--border); padding-bottom: 0.25rem; }
.ai-message-bubble h3 { font-size: 1.2rem; }
.ai-message-bubble h4 { font-size: 1.05rem; }
.ai-message-bubble h5 { font-size: 0.95rem; }
.ai-message-bubble h6 { font-size: 0.9rem; color: var(--text-secondary); }

.ai-message-bubble h1:first-child,
.ai-message-bubble h2:first-child,
.ai-message-bubble h3:first-child { margin-top: 0; }

.ai-message-bubble p {
    margin: 0.5rem 0;
}

.ai-message-bubble ul,
.ai-message-bubble ol {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}

.ai-message-bubble ul { list-style: disc; }
.ai-message-bubble ol { list-style: decimal; }

.ai-message-bubble li {
    margin: 0.25rem 0;
}

.ai-message-bubble blockquote {
    margin: 0.75rem 0;
    padding: 0.5rem 1rem;
    border-left: 3px solid #06B6D4;
    background: rgba(8, 145, 178, 0.06);
    border-radius: 0 8px 8px 0;
    color: var(--text-secondary);
}

.ai-message-bubble a {
    color: #06B6D4;
    text-decoration: none;
    word-break: break-all;
}

.ai-message-bubble a:hover {
    text-decoration: underline;
}

.ai-message-bubble strong {
    font-weight: 600;
    color: var(--text);
}

.ai-message-bubble del {
    color: var(--text-light);
}

/* Code wrapper with copy button */
.ai-code-wrapper {
    position: relative;
    margin: 0.75rem 0;
}

.ai-code-copy {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 6px;
    color: #CBD5E1;
    cursor: pointer;
    transition: all 0.15s ease;
    z-index: 2;
}

.ai-code-copy:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.ai-code-copy i {
    width: 14px;
    height: 14px;
}

.ai-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 24px;
}

.ai-typing {
    display: flex;
    gap: 4px;
}

.ai-typing span {
    width: 8px;
    height: 8px;
    background: var(--text-light);
    border-radius: 50%;
    animation: aiTyping 1.4s infinite;
}

.ai-typing span:nth-child(2) { animation-delay: 0.2s; }
.ai-typing span:nth-child(3) { animation-delay: 0.4s; }

@keyframes aiTyping {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-6px); opacity: 1; }
}

.ai-error {
    background: #FEF2F2 !important;
    border-color: #FECACA !important;
    color: #991B1B;
}

.ai-input-area {
    border-top: 1px solid var(--border);
    padding: 1rem 1.25rem;
    background: var(--bg);
}

.ai-input-container {
    display: flex;
    align-items: flex-end;
    gap: 0.75rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 0.5rem 0.5rem 0.5rem 1rem;
    transition: border-color 0.2s ease;
}

.ai-input-container:focus-within {
    border-color: #06B6D4;
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.ai-input-textarea {
    flex: 1;
    padding: 0.5rem 0;
    border: none;
    outline: none;
    resize: none;
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text);
    background: transparent;
    font-family: inherit;
    max-height: 150px;
    min-height: 24px;
}

.ai-input-textarea::placeholder {
    color: var(--text-light);
}

.ai-input-actions {
    display: flex;
    gap: 0.5rem;
}

.ai-send-btn {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.ai-send-btn:hover:not(:disabled) {
    transform: scale(1.05);
}

.ai-send-btn:disabled {
    cursor: not-allowed;
}

.ai-send-btn i {
    width: 18px;
    height: 18px;
}

.ai-stop-btn {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    border: none;
    background: linear-gradient(135deg, #EF4444, #DC2626);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
    animation: aiStopPulse 1.5s ease-in-out infinite;
}

.ai-stop-btn:hover {
    transform: scale(1.05);
}

.ai-stop-btn i {
    width: 16px;
    height: 16px;
}

@keyframes aiStopPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4); }
    50% { box-shadow: 0 0 0 8px rgba(239, 68, 68, 0); }
}

.ai-input-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.5rem;
    padding: 0 0.25rem;
}

.ai-api-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-light);
}

.status-dot {
    width: 6px;
    height: 6px;
    background: var(--text-light);
    border-radius: 50%;
}

.status-connected {
    background: #10B981;
    box-shadow: 0 0 6px rgba(16, 185, 129, 0.5);
}

.ai-token-count {
    font-size: 0.75rem;
    color: var(--text-light);
}

/* Markdown rendering */
.ai-message-bubble p {
    margin: 0;
}

.ai-message-bubble p + p {
    margin-top: 0.5rem;
}

.ai-message-bubble strong {
    font-weight: 600;
}

.ai-code-block {
    background: #0F172A;
    border-radius: 10px;
    padding: 0.875rem 1rem;
    margin: 0.75rem 0;
    overflow-x: auto;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.8rem;
    line-height: 1.5;
}

.ai-code-block code {
    background: transparent;
    padding: 0;
    color: #E2E8F0;
    white-space: pre;
}

.ai-code-block pre {
    margin: 0;
    padding: 0;
    background: transparent;
}

/* Override highlight.js to use transparent background for our code block */
.ai-code-block.hljs {
    background: #0F172A !important;
    padding: 0.875rem 1rem !important;
    border-radius: 10px;
}

.ai-code-block code.hljs {
    background: #0F172A !important;
    padding: 0 !important;
}

.ai-inline-code {
    background: rgba(8, 145, 178, 0.1);
    color: #0891B2;
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.85em;
}

.ai-user .ai-inline-code {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.ai-streaming-cursor {
    display: inline;
    animation: blink 0.7s infinite;
    color: #06B6D4;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* Modal */
.ai-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.ai-modal:not(.hidden) {
    display: flex;
}

.ai-modal.hidden {
    display: none;
}

.ai-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.ai-modal-content {
    position: relative;
    background: var(--bg-card);
    border-radius: 24px;
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    animation: aiModalIn 0.25s ease;
}

@keyframes aiModalIn {
    from { opacity: 0; transform: translateY(20px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.ai-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
}

.ai-modal-header h3 {
    font-size: 1.25rem;
}

.ai-modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    border: none;
    border-radius: 10px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
}

.ai-modal-close:hover {
    background: #FEF2F2;
    color: #DC2626;
}

.ai-modal-close i {
    width: 18px;
    height: 18px;
}

.ai-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.ai-setting-group {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.ai-setting-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text);
}

.ai-setting-value {
    color: #06B6D4;
    font-weight: 600;
}

.ai-setting-input {
    padding: 0.625rem 0.875rem;
    background: var(--bg);
    border: 1.5px solid var(--border);
    border-radius: 10px;
    font-size: 0.9rem;
    color: var(--text);
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s ease;
}

.ai-setting-input:focus {
    border-color: #06B6D4;
}

.ai-setting-hint {
    font-size: 0.75rem;
    color: var(--text-light);
}

.ai-password-input {
    position: relative;
}

.ai-password-toggle {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
}

.ai-password-toggle:hover {
    background: var(--bg-card);
}

.ai-password-toggle i {
    width: 16px;
    height: 16px;
}

.ai-password-input .ai-setting-input {
    padding-right: 44px;
}

.ai-setting-textarea {
    padding: 0.625rem 0.875rem;
    background: var(--bg);
    border: 1.5px solid var(--border);
    border-radius: 10px;
    font-size: 0.9rem;
    color: var(--text);
    font-family: inherit;
    outline: none;
    resize: vertical;
    min-height: 60px;
}

.ai-setting-textarea:focus {
    border-color: #06B6D4;
}

.ai-settings-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.ai-setting-half {
    min-width: 0;
}

.ai-range {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border);
    border-radius: 3px;
    outline: none;
}

.ai-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--range-color, #06B6D4);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.ai-range::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--range-color, #06B6D4);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.ai-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.ai-checkbox input {
    width: 16px;
    height: 16px;
    accent-color: #06B6D4;
    cursor: pointer;
}

.ai-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
}

.ai-btn-primary {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background: linear-gradient(135deg, #0891B2, #06B6D4);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.ai-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(8, 145, 178, 0.3);
}

.ai-btn-primary i {
    width: 16px;
    height: 16px;
}

.ai-btn-secondary {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.ai-btn-secondary:hover {
    color: var(--text);
    border-color: var(--text-light);
}

.ai-btn-secondary i {
    width: 16px;
    height: 16px;
}

/* Toast */
.ai-toast {
    position: fixed;
    top: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: #0F172A;
    color: white;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    z-index: 10000;
    animation: aiToastIn 0.3s ease;
}

.ai-toast.hidden {
    display: none;
}

.ai-toast i {
    width: 20px;
    height: 20px;
}

.ai-toast-success i {
    color: #10B981;
}

.ai-toast-error i {
    color: #EF4444;
}

@keyframes aiToastIn {
    from { opacity: 0; transform: translateX(-50%) translateY(-20px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@media (max-width: 768px) {
    .ai-chat-card {
        grid-template-columns: 1fr;
    }

    .ai-sidebar {
        height: auto;
        max-height: 200px;
    }

    .ai-history-section {
        display: none;
    }

    .ai-main {
        height: 500px;
    }

    .ai-message {
        max-width: 95%;
    }

    .ai-settings-row {
        grid-template-columns: 1fr;
    }

    .ai-modal-content {
        max-height: 95vh;
    }
    }
}

/* ===== 用户认证样式 ===== */

/* 导航栏用户区域 */
.nav-user-area {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    margin-left: auto;
    position: relative;
}

/* 登录/注册按钮 */
.nav-login-btn,
.nav-register-btn {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0 0.875rem;
    height: 38px;
    border: none;
    border-radius: 10px;
    font-size: 0.875rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.nav-login-btn {
    background: transparent;
    color: var(--text-secondary);
    border: 1.5px solid var(--border);
}

.nav-login-btn:hover {
    color: var(--primary);
    border-color: var(--primary-light);
    background: rgba(30, 58, 138, 0.05);
}

.nav-register-btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
}

.nav-register-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(30, 58, 138, 0.3);
}

/* 用户菜单 */
.nav-user-menu {
    position: relative;
}

.nav-user-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.3125rem 0.625rem 0.3125rem 0.3125rem;
    height: 38px;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    background: var(--bg-card);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.nav-user-btn:hover {
    border-color: var(--primary-light);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.nav-user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
    flex-shrink: 0;
    overflow: hidden;
}

.nav-user-avatar-img {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.nav-user-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text);
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 下拉菜单 */
.nav-user-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 220px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
    padding: 0.625rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s ease;
    z-index: 1000;
}

.nav-user-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.5rem;
}

.nav-user-info-avatar {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 600;
    flex-shrink: 0;
    overflow: hidden;
}

.nav-user-info-name {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text);
}

.nav-user-info-email {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.nav-user-dropdown-divider {
    height: 1px;
    background: var(--border);
    margin: 0.5rem 0;
}

.nav-user-dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    width: 100%;
    padding: 0.625rem 0.75rem;
    border: none;
    border-radius: 10px;
    background: transparent;
    color: var(--text);
    font-size: 0.875rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.15s ease;
    text-align: left;
}

.nav-user-dropdown-item:hover {
    background: var(--bg);
    color: var(--primary);
}

.nav-user-dropdown-item i {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* 认证模态框 */
.auth-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s ease;
}

.auth-modal.show {
    opacity: 1;
    visibility: visible;
}

.auth-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.auth-modal-content {
    position: relative;
    background: var(--bg-card);
    border-radius: 28px;
    width: 100%;
    max-width: 420px;
    padding: 2rem;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.2);
    transform: translateY(20px) scale(0.97);
    transition: transform 0.3s ease;
    max-height: 90vh;
    overflow-y: auto;
}

.auth-modal.show .auth-modal-content {
    transform: translateY(0) scale(1);
}

.auth-modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 10px;
    background: var(--bg);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.auth-modal-close:hover {
    background: var(--border);
    color: var(--text);
}

.auth-modal-close i {
    width: 18px;
    height: 18px;
}

.auth-modal-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.auth-modal-logo {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin: 0 auto 1rem;
}

.auth-modal-logo i {
    width: 28px;
    height: 28px;
}

.auth-modal-header h3 {
    font-size: 1.5rem;
    margin-bottom: 0.375rem;
}

.auth-modal-header p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* 认证表单 */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.auth-form-group {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.auth-form-group.hidden {
    display: none;
}

.auth-form-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text);
}

.auth-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.auth-input-icon {
    position: absolute;
    left: 0.875rem;
    width: 18px;
    height: 18px;
    color: var(--text-light);
    pointer-events: none;
    z-index: 1;
}

.auth-form-input {
    width: 100%;
    padding: 0.75rem 0.875rem 0.75rem 2.75rem;
    border: 1.5px solid var(--border);
    border-radius: 12px;
    font-size: 0.9375rem;
    font-family: inherit;
    color: var(--text);
    background: var(--bg-card);
    outline: none;
    transition: all 0.2s ease;
}

.auth-form-input:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.auth-form-input::placeholder {
    color: var(--text-light);
}

.auth-password-toggle {
    position: absolute;
    right: 0.625rem;
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: var(--text-light);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.auth-password-toggle:hover {
    color: var(--text);
    background: var(--bg);
}

.auth-password-toggle i {
    width: 16px;
    height: 16px;
}

.auth-error {
    font-size: 0.8125rem;
    color: var(--error);
    min-height: 1.2em;
    text-align: center;
}

.auth-submit-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem;
    margin-top: 0.5rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
    letter-spacing: 0.05em;
}

.auth-submit-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(30, 58, 138, 0.3);
}

.auth-submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.auth-loading-spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: authSpin 0.7s linear infinite;
}

.auth-loading-spinner.hidden {
    display: none;
}

@keyframes authSpin {
    to { transform: rotate(360deg); }
}

/* 角色 Tab（用户 / 管理员） */
.auth-role-tabs {
    display: flex;
    gap: 0.5rem;
    padding: 0.25rem;
    background: rgba(99, 102, 241, 0.06);
    border: 1px solid rgba(99, 102, 241, 0.1);
    border-radius: 12px;
    margin-bottom: 1.5rem;
}
.auth-role-tab {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    padding: 0.5rem 0.75rem;
    border: none;
    border-radius: 9px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
}
.auth-role-tab:hover { color: var(--text); }
.auth-role-tab.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    box-shadow: 0 4px 10px rgba(59, 130, 246, 0.2);
}

/* 切换登录/注册 */
.auth-switch {
    text-align: center;
    margin-top: 1.25rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.auth-switch-btn {
    background: none;
    border: none;
    color: var(--primary-light);
    font-size: 0.875rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    padding: 0 0.25rem;
    transition: color 0.15s ease;
}

.auth-switch-btn:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* 安全提示 */
.auth-notice {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-top: 1.25rem;
    padding: 0.75rem 0.875rem;
    background: rgba(16, 185, 129, 0.06);
    border: 1px solid rgba(16, 185, 129, 0.15);
    border-radius: 12px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.auth-notice i {
    color: #10B981;
    margin-top: 1px;
}

/* 响应式 */
@media (max-width: 768px) {
    .nav-user-area {
        margin-left: 0;
    }

    .nav-login-btn span,
    .nav-register-btn span {
        display: none;
    }

    .nav-login-btn,
    .nav-register-btn {
        padding: 0.5rem;
    }

    .nav-user-name {
        display: none;
    }

    .nav-user-btn {
        padding: 0.25rem;
    }

    .auth-modal-content {
        padding: 1.5rem 1.25rem;
        border-radius: 20px;
    }
}

/* ===== 用户中心页面样式 ===== */

.profile-not-logged-in {
    max-width: 480px;
    margin: 6rem auto;
    text-align: center;
    padding: 2rem;
}

.profile-empty-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--bg-card);
    border: 2px dashed var(--border);
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
}

.profile-empty-icon i {
    width: 36px;
    height: 36px;
}

.profile-not-logged-in h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.profile-not-logged-in p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.profile-empty-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
}

.profile-empty-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: 1.5px solid var(--border);
    border-radius: 12px;
    background: var(--bg-card);
    color: var(--text);
    font-size: 0.9375rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
}

.profile-empty-btn.primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    border-color: transparent;
}

.profile-empty-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* 个人信息卡片 */
.profile-section {
    max-width: 960px;
    margin: 2rem auto 4rem;
    padding: 0 1.5rem;
}

.profile-card {
    background: var(--bg-card);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    margin-bottom: 1.5rem;
}

.profile-banner {
    height: 120px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    transition: background 0.3s ease;
}

.profile-header {
    display: flex;
    gap: 1.5rem;
    padding: 0 2rem 1.5rem;
    margin-top: -48px;
}

.profile-avatar-large {
    width: 96px;
    height: 96px;
    border-radius: 28px;
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2.5rem;
    font-weight: 700;
    border: 4px solid var(--bg-card);
    flex-shrink: 0;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    background-repeat: no-repeat;
    overflow: hidden;
}

.profile-avatar-img-mode {
    background-size: cover !important;
    background-position: center !important;
}

.profile-header-info {
    flex: 1;
    padding-top: 52px;
}

.profile-header-info h2 {
    font-size: 1.5rem;
    margin-bottom: 0.125rem;
}

.profile-username {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.profile-bio {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    line-height: 1.5;
}

.profile-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.profile-meta-item {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

/* 设置网格 */
.profile-settings-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

/* 面板 */
.profile-panel {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

.profile-panel-header {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    margin-bottom: 1.25rem;
}

.profile-panel-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.profile-panel-icon i {
    width: 22px;
    height: 22px;
}

.profile-panel-header h3 {
    font-size: 1.0625rem;
    margin-bottom: 0.125rem;
}

.profile-panel-header p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.profile-panel-body {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* 表单 */
.profile-form-group {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
    position: relative;
}

.profile-form-group label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text);
}

.profile-input {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    font-size: 0.875rem;
    font-family: inherit;
    color: var(--text);
    background: var(--bg-card);
    outline: none;
    transition: all 0.2s ease;
    box-sizing: border-box;
}

.profile-input:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.profile-textarea {
    resize: none;
    font-family: inherit;
    line-height: 1.5;
}

.profile-char-count {
    font-size: 0.75rem;
    color: var(--text-light);
    text-align: right;
}

.profile-input-wrapper {
    position: relative;
}

.profile-input-wrapper .profile-input {
    padding-right: 2.5rem;
}

.profile-password-toggle {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: var(--text-light);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.profile-password-toggle:hover {
    color: var(--text);
    background: var(--bg);
}

.profile-password-toggle i {
    width: 16px;
    height: 16px;
}

/* 保存按钮 */
.profile-save-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 0.875rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 0.25rem;
}

.profile-save-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(30, 58, 138, 0.25);
}

.profile-save-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* 危险按钮 */
.profile-danger-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    background: transparent;
    color: var(--error);
    border: 1.5px solid rgba(239, 68, 68, 0.3);
    border-radius: 10px;
    font-size: 0.875rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 0.5rem;
}

.profile-danger-btn:hover {
    background: rgba(239, 68, 68, 0.08);
    border-color: var(--error);
}

/* 通用按钮 */
.profile-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    border-radius: 10px;
    font-size: 0.8125rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1.5px solid transparent;
}

.profile-btn-secondary {
    background: var(--bg-secondary);
    color: var(--text);
    border-color: var(--border);
}

.profile-btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--primary-light);
}

.profile-btn-danger-ghost {
    background: transparent;
    color: var(--error);
    border-color: rgba(239, 68, 68, 0.3);
}

.profile-btn-danger-ghost:hover {
    background: rgba(239, 68, 68, 0.08);
    border-color: var(--error);
}

/* 图片上传区域 */
.profile-image-upload-area {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}

.profile-upload-tip {
    width: 100%;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* 头像设置 */
.profile-avatar-preview {
    width: 72px;
    height: 72px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    font-weight: 700;
    margin: 0 auto;
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    background-size: cover;
    background-position: center;
}

.profile-avatar-preview-img {
    font-size: 0;
}

.profile-color-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0.625rem;
}

.profile-color-item {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 12px;
    cursor: pointer;
    border: 3px solid transparent;
    transition: all 0.2s ease;
    position: relative;
}

.profile-color-item:hover {
    transform: scale(1.08);
}

.profile-color-item.selected {
    border-color: var(--text);
    transform: scale(1.05);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.profile-color-item.selected::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* 统计 */
.profile-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.profile-stat-item {
    text-align: center;
    padding: 1rem 0.5rem;
    background: var(--bg);
    border-radius: 12px;
}

.profile-stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.25rem;
    font-family: 'Space Grotesk', sans-serif;
}

.profile-stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    z-index: 10001;
    font-size: 0.875rem;
    animation: toastSlideUp 0.3s ease;
}

.toast.hidden {
    display: none;
}

.toast-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast-icon i {
    width: 18px;
    height: 18px;
}

.toast-success {
    color: #10B981;
}

.toast-error {
    color: var(--error);
}

@keyframes toastSlideUp {
    from {
        opacity: 0;
        transform: translate(-50%, 1rem);
    }
    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

/* 响应式 */
@media (max-width: 768px) {
    .profile-settings-grid {
        grid-template-columns: 1fr;
    }

    .profile-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 0 1.25rem 1.5rem;
    }

    .profile-header-info {
        padding-top: 0;
    }

    .profile-meta {
        justify-content: center;
    }

    .profile-section {
        padding: 0 1rem;
    }

    .profile-color-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

/* ========== Git搜索页面样式 ========== */
.gs-hero {
    padding-bottom: 2rem;
}

.gs-search-section {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1.5rem 3rem;
}

/* 搜索引擎切换栏 */
.gs-engine-switcher {
    display: flex;
    gap: 0.5rem;
    padding: 0.5rem;
    margin-bottom: 1rem;
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.gs-engine-tab {
    flex-shrink: 0;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 10px;
    font-size: 0.8125rem;
    font-weight: 600;
    font-family: inherit;
    color: var(--text-secondary);
    background: transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.gs-engine-tab:hover {
    background: var(--bg-hover);
    color: var(--text);
}

.gs-engine-tab.active {
    background: linear-gradient(135deg, #181717, #4B5563);
    color: white;
}

/* ========== 暗色模式 ========== */
body.dark-mode {
    --bg: #0F172A;
    --bg-card: #1E293B;
    --text: #F1F5F9;
    --text-secondary: #94A3B8;
    --text-light: #64748B;
    --border: #334155;
    --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.3);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -1px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4), 0 4px 6px -2px rgba(0,0,0,0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.5), 0 10px 10px -5px rgba(0,0,0,0.3);
}
body.dark-mode {
    background-color: var(--bg);
    color: var(--text);
}
body.dark-mode .navbar {
    background: rgba(15, 23, 42, 0.85);
    border-bottom-color: rgba(51, 65, 85, 0.5);
}
body.dark-mode .bg-decoration .gradient-orb { opacity: 0.15; }
body.dark-mode .hero-badge {
    background: rgba(99, 102, 241, 0.15);
    color: #A78BFA;
}
body.dark-mode .upload-zone {
    background: linear-gradient(180deg, #1E293B 0%, #0F172A 100%);
    border-color: var(--border);
}
body.dark-mode .upload-zone:hover,
body.dark-mode .upload-zone.dragover {
    background: linear-gradient(180deg, rgba(99,102,241,0.1) 0%, rgba(99,102,241,0.05) 100%);
    border-color: #6366F1;
}
body.dark-mode .progress-bar { background: #334155; }
body.dark-mode .ai-message-bubble {
    background: #0F172A;
    border-color: #334155;
}
body.dark-mode .ai-message.ai-user .ai-message-bubble {
    background: linear-gradient(135deg, #4338CA, #4F46E5);
}
body.dark-mode .ai-input-textarea {
    background: #0F172A;
    border-color: #334155;
    color: var(--text);
}
body.dark-mode .ai-sidebar { background: #0F172A; border-color: #334155; }
body.dark-mode .ai-history-item { background: #1E293B; border-color: #334155; }
body.dark-mode .ai-history-item:hover { background: #334155; }
body.dark-mode .ai-modal-content { background: #1E293B; border-color: #334155; }
body.dark-mode .ai-setting-input {
    background: #0F172A;
    border-color: #334155;
    color: var(--text);
}
body.dark-mode .ai-preset-btn {
    background: #0F172A;
    border-color: #334155;
}
body.dark-mode .ai-preset-btn:hover { background: #334155; }
body.dark-mode .auth-modal-content { background: #1E293B; }
body.dark-mode .auth-form-input {
    background: #0F172A;
    border-color: #334155;
    color: var(--text);
}
body.dark-mode .auth-role-tabs { background: rgba(99,102,241,0.1); }
body.dark-mode .profile-input,
body.dark-mode .profile-form-input {
    background: #0F172A !important;
    border-color: #334155 !important;
    color: var(--text) !important;
}
body.dark-mode .profile-panel,
body.dark-mode .profile-section,
body.dark-mode .profile-card {
    background: var(--bg-card) !important;
    border-color: var(--border) !important;
}
body.dark-mode .shortcut-chip { background: rgba(99,102,241,0.1); }
body.dark-mode .gs-search-card { background: var(--bg-card); border-color: var(--border); }
body.dark-mode .gs-search-input { background: #0F172A; border-color: #334155; color: var(--text); }
body.dark-mode .gs-history-item { background: #1E293B; border-color: #334155; }
body.dark-mode .gs-history-item:hover { background: #334155; }
body.dark-mode .filter-chip { background: transparent; }
body.dark-mode .tools-filter-bar { background: var(--bg-card); border-color: var(--border); }
body.dark-mode .toast { background: var(--bg-card); border-color: var(--border); }

/* ===== 工具评分组件 ===== */
.tool-rating-widget {
    max-width: 680px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.tool-rating-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.25rem 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

.tool-rating-card:hover {
    box-shadow: var(--shadow);
}

.tool-rating-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, #F59E0B, #FBBF24);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.tool-rating-icon i { width: 22px; height: 22px; }

.tool-rating-info {
    flex: 1;
    min-width: 0;
}

.tool-rating-info h3 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.125rem;
}

.tool-rating-info p {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.tool-rating-stars {
    display: flex;
    gap: 0.25rem;
    flex-shrink: 0;
}

.rating-star-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    color: var(--border);
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
}

.rating-star-btn i { width: 22px; height: 22px; }

.rating-star-btn:hover {
    color: #FBBF24;
    transform: scale(1.15);
}

.rating-star-btn.active {
    color: #F59E0B;
}

.rating-star-btn.active i {
    fill: #F59E0B;
}

.tool-rating-result {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    flex-shrink: 0;
    min-width: 70px;
}

.tool-rating-avg {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    font-family: 'Space Grotesk', sans-serif;
    line-height: 1;
}

.tool-rating-count {
    font-size: 0.6875rem;
    color: var(--text-light);
    margin-top: 0.25rem;
}

@media (max-width: 600px) {
    .tool-rating-card {
        flex-wrap: wrap;
        gap: 0.75rem;
    }
    .tool-rating-result {
        flex-direction: row;
        align-items: center;
        gap: 0.5rem;
        width: 100%;
        justify-content: center;
    }
}

body.dark-mode .tool-rating-card { background: var(--bg-card); border-color: var(--border); }

/* ===== 论坛样式 ===== */
.forum-section { padding: 1rem 0 3rem; }

.forum-toolbar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.forum-search-wrap {
    flex: 1;
    min-width: 200px;
    position: relative;
    display: flex;
    align-items: center;
}

.forum-search-icon {
    position: absolute;
    left: 0.875rem;
    width: 18px;
    height: 18px;
    color: var(--text-light);
    pointer-events: none;
}

.forum-search-input {
    width: 100%;
    padding: 0.625rem 2.5rem 0.625rem 2.5rem;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 0.875rem;
    font-family: inherit;
    background: var(--bg-card);
    color: var(--text);
    transition: border-color 0.2s ease;
}

.forum-search-input:focus {
    outline: none;
    border-color: #7C3AED;
}

.forum-search-clear {
    position: absolute;
    right: 0.625rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-light);
    padding: 0.25rem;
    display: flex;
    align-items: center;
}

.forum-toolbar-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.forum-select {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 0.8125rem;
    font-family: inherit;
    background: var(--bg-card);
    color: var(--text);
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.forum-select:focus { outline: none; border-color: #7C3AED; }

.forum-new-post-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    background: linear-gradient(135deg, #7C3AED, #A855F7);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 10px;
    font-size: 0.8125rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    height: 38px;
}

.forum-new-post-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
}

/* 帖子列表 */
.forum-post-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.forum-post-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1.25rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.forum-post-card:hover {
    border-color: #A855F7;
    box-shadow: 0 4px 16px rgba(124, 58, 237, 0.08);
    transform: translateY(-1px);
}

.forum-post-header {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    margin-bottom: 0.625rem;
}

.forum-avatar {
    flex-shrink: 0;
}

.forum-post-meta {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    flex: 1;
    min-width: 0;
}

.forum-post-author {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text);
}

.forum-post-time {
    font-size: 0.75rem;
    color: var(--text-light);
}

.forum-post-category {
    font-size: 0.6875rem;
    font-weight: 600;
    padding: 0.25rem 0.625rem;
    border-radius: 50px;
    white-space: nowrap;
    flex-shrink: 0;
}

.forum-post-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.375rem;
    line-height: 1.4;
}

.forum-post-preview {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 0.625rem;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.forum-post-stats {
    display: flex;
    gap: 1rem;
}

.forum-stat {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    color: var(--text-light);
}

.forum-stat.liked { color: #EF4444; }
.forum-stat.liked i { fill: #EF4444; }

/* 空状态 */
.forum-empty {
    text-align: center;
    padding: 3rem 1rem;
}

.forum-empty p {
    margin-top: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* 帖子详情 */
.forum-detail-post {
    margin-bottom: 1.5rem;
}

.forum-detail-content {
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--text);
    margin: 0.75rem 0 1rem;
    padding: 1rem;
    background: rgba(124, 58, 237, 0.03);
    border-radius: 10px;
    border: 1px solid rgba(124, 58, 237, 0.1);
}

.forum-detail-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.forum-like-btn {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.875rem;
    border: 1px solid var(--border);
    border-radius: 50px;
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
}

.forum-like-btn:hover { border-color: #EF4444; color: #EF4444; }

.forum-like-btn.liked {
    background: rgba(239, 68, 68, 0.1);
    border-color: #EF4444;
    color: #EF4444;
}

.forum-like-btn.liked i { fill: #EF4444; }

.forum-delete-btn {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.375rem 0.75rem;
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 50px;
    background: transparent;
    color: var(--error);
    font-size: 0.75rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
}

.forum-delete-btn:hover { background: rgba(239, 68, 68, 0.1); }

/* 回复区 */
.forum-replies-section {
    border-top: 1px solid var(--border);
    padding-top: 1.25rem;
}

.forum-replies-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.75rem;
}

.forum-no-replies {
    text-align: center;
    color: var(--text-light);
    font-size: 0.8125rem;
    padding: 1rem;
}

.forum-reply-item {
    display: flex;
    gap: 0.625rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(226, 232, 240, 0.5);
}

.forum-reply-item:last-child { border-bottom: none; }

.forum-reply-body { flex: 1; min-width: 0; }

.forum-reply-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}

.forum-reply-author {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text);
}

.forum-reply-time {
    font-size: 0.6875rem;
    color: var(--text-light);
}

.forum-reply-delete {
    margin-left: auto;
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: 0.125rem;
    display: flex;
    align-items: center;
    border-radius: 4px;
    transition: color 0.2s ease;
}

.forum-reply-delete:hover { color: var(--error); }

.forum-reply-content {
    font-size: 0.8125rem;
    line-height: 1.6;
    color: var(--text);
}

.forum-reply-input-area {
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.forum-reply-input-area .forum-new-post-btn {
    align-self: flex-end;
}

.forum-login-hint {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.8125rem;
    padding: 0.75rem;
}

.forum-modal-footer {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
    margin-top: 1rem;
}

/* 代码块 */
.forum-code-block {
    background: #1e293b;
    color: #e2e8f0;
    padding: 0.75rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 0.5rem 0;
    font-size: 0.8125rem;
}

.forum-inline-code {
    background: rgba(124, 58, 237, 0.1);
    color: #7C3AED;
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    font-size: 0.85em;
}

/* 暗色模式适配 */
body.dark-mode .forum-post-card { background: var(--bg-card); border-color: var(--border); }
body.dark-mode .forum-detail-content { background: rgba(124, 58, 237, 0.08); }
body.dark-mode .forum-search-input,
body.dark-mode .forum-select { background: var(--bg-card); color: var(--text); border-color: var(--border); }

/* 响应式 */
@media (max-width: 640px) {
    .forum-toolbar { flex-direction: column; align-items: stretch; }
    .forum-toolbar-right { flex-wrap: wrap; }
    .forum-search-wrap { width: 100%; }
}

/* 暗色模式切换按钮 */
.dark-mode-toggle {
    width: 41px;
    height: 38px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    display: grid;
    align-items: center;
    justify-content: center;
    transition: all 0.4s ease;
    flex-shrink: 0;
    transform: rotate(360deg);
    position: absolute;
}
.dark-mode-toggle:hover {
    border-color: var(--primary-light);
    color: var(--primary);
    transform: rotate(360deg) translateY(-1px);
}
.dark-mode-toggle.active {
    background: linear-gradient(135deg, #F59E0B, #FBBF24);
    color: white;
    border-color: transparent;
}

.gs-search-card {
    background: var(--bg-card);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

.gs-search-box {
    display: flex;
    gap: 0.75rem;
    align-items: stretch;
}

.gs-search-input-wrap {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
}

.gs-search-icon {
    position: absolute;
    left: 1rem;
    width: 20px;
    height: 20px;
    color: var(--text-light);
    pointer-events: none;
    z-index: 1;
}

.gs-search-input {
    width: 100%;
    padding: 0.875rem 2.75rem 0.875rem 2.75rem;
    border: 2px solid var(--border);
    border-radius: 14px;
    font-size: 1rem;
    font-family: inherit;
    color: var(--text);
    background: var(--bg);
    outline: none;
    transition: all 0.2s ease;
    box-sizing: border-box;
}

.gs-search-input:focus {
    border-color: #181717;
    background: var(--bg-card);
    box-shadow: 0 0 0 4px rgba(24, 23, 23, 0.08);
}

.gs-search-input::placeholder {
    color: var(--text-light);
}

.gs-clear-btn {
    position: absolute;
    right: 0.75rem;
    width: 28px;
    height: 28px;
    border: none;
    background: var(--border);
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    z-index: 1;
}

.gs-clear-btn:hover {
    background: var(--text-secondary);
    color: white;
}

.gs-clear-btn i {
    width: 14px;
    height: 14px;
}

.gs-search-btn {
    padding: 0.875rem 1.75rem;
    border: none;
    border-radius: 14px;
    background: linear-gradient(135deg, #181717, #4B5563);
    color: white;
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.gs-search-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(24, 23, 23, 0.25);
}

.gs-search-btn:active {
    transform: translateY(0);
}

.gs-search-btn i {
    width: 18px;
    height: 18px;
}

/* 平台选择 */
.gs-platforms {
    margin-top: 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.gs-platforms-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding-top: 0.5rem;
    white-space: nowrap;
}

.gs-platform-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.gs-platform-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg);
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.gs-platform-chip:hover {
    border-color: #6B7280;
    color: var(--text);
}

.gs-platform-chip.active {
    border-color: #181717;
    background: #181717;
    color: white;
}

.gs-platform-chip input {
    display: none;
}

/* 快捷标签 */
.gs-quick-tags {
    margin-top: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.gs-quick-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.gs-quick-tag {
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.75rem;
    font-family: inherit;
    color: var(--text-secondary);
    background: transparent;
    cursor: pointer;
    transition: all 0.2s ease;
}

.gs-quick-tag:hover {
    background: #181717;
    color: white;
    border-color: #181717;
}

/* 搜索引擎信息 */
.gs-engine-info {
    margin-top: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.gs-engine-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    background: rgba(24, 23, 23, 0.06);
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    color: #181717;
}

.gs-engine-tip {
    font-size: 0.75rem;
    color: var(--text-light);
}

/* ====== 搜索结果区域 ====== */
.gs-results-section {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1.5rem 2rem;
}

.gs-results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 0;
    border-bottom: 2px solid var(--border);
    margin-bottom: 1rem;
}

.gs-results-brand {
    display: flex;
    align-items: center;
    gap: 0.875rem;
}

.gs-results-logo {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: linear-gradient(135deg, #181717, #4B5563);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.gs-results-logo svg {
    width: 22px;
    height: 22px;
}

.gs-results-brand h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    margin: 0;
    line-height: 1.3;
}

.gs-results-meta {
    font-size: 0.8125rem;
    color: var(--text-light);
    margin: 2px 0 0;
}

.gs-close-results {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.gs-close-results:hover {
    background: #fee2e2;
    color: #ef4444;
    border-color: #fecaca;
}

.gs-close-results svg {
    width: 18px;
    height: 18px;
}

/* 加载状态 */
.gs-results-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
    gap: 1rem;
}

.gs-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--border);
    border-top-color: #181717;
    border-radius: 50%;
    animation: gs-spin 0.8s linear infinite;
}

@keyframes gs-spin {
    to { transform: rotate(360deg); }
}

.gs-results-loading p {
    color: var(--text-light);
    font-size: 0.875rem;
}

/* 错误状态 */
.gs-results-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
    gap: 0.875rem;
    text-align: center;
}

.gs-results-error p {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
}

.gs-fallback-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, #181717, #4B5563);
    color: white;
    border-radius: 8px;
    font-size: 0.8125rem;
    text-decoration: none;
    transition: all 0.2s ease;
}

.gs-fallback-link:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

/* 结果列表 */
.gs-results-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.gs-result-item {
    display: flex;
    gap: 0.75rem;
    padding: 1.125rem 0;
    border-bottom: 1px solid var(--border);
}

.gs-result-item:last-child {
    border-bottom: none;
}

.gs-result-favicon {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: var(--bg-hover);
    margin-top: 2px;
}

.gs-result-content {
    flex: 1;
    min-width: 0;
}

.gs-result-title {
    display: block;
    font-size: 1.0625rem;
    font-weight: 600;
    color: #1a0dab;
    text-decoration: none;
    line-height: 1.4;
    margin-bottom: 0.25rem;
    word-break: break-word;
}

.gs-result-title:hover {
    text-decoration: underline;
}

.gs-result-title:visited {
    color: #681da8;
}

.gs-result-url {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    margin-bottom: 0.375rem;
}

.gs-result-site {
    font-size: 0.8125rem;
    color: var(--text-light);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.gs-result-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
    word-break: break-word;
}

/* 无结果 */
.gs-no-results {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
    gap: 0.875rem;
}

.gs-no-results p {
    color: var(--text-light);
    font-size: 1rem;
}

/* 分页 */
.gs-results-pager {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1.5rem 0 0.5rem;
}

.gs-page-btn {
    padding: 0.5rem 1.125rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.8125rem;
    font-family: inherit;
    color: var(--text);
    background: var(--bg-card);
    cursor: pointer;
    transition: all 0.2s ease;
}

.gs-page-btn:hover:not(:disabled) {
    background: #181717;
    color: white;
    border-color: #181717;
}

.gs-page-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.gs-page-info {
    font-size: 0.8125rem;
    color: var(--text-light);
}

/* 搜索历史 */
.gs-history-section {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1.5rem 3rem;
}

.gs-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.gs-section-header h2 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text);
}

.gs-clear-history-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.8125rem;
    font-family: inherit;
    color: var(--text-secondary);
    background: var(--bg-card);
    cursor: pointer;
    transition: all 0.2s ease;
}

.gs-clear-history-btn:hover {
    color: var(--error);
    border-color: var(--error);
    background: rgba(239, 68, 68, 0.05);
}

.gs-history-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.gs-empty-history {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-light);
}

.gs-empty-history p {
    margin-top: 0.75rem;
    font-size: 0.875rem;
}

.gs-history-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0.75rem 1rem;
    transition: all 0.2s ease;
}

.gs-history-item:hover {
    border-color: #9CA3AF;
    box-shadow: var(--shadow-sm);
}

.gs-history-link {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    text-decoration: none;
    color: inherit;
    min-width: 0;
}

.gs-history-info {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    min-width: 0;
    flex: 1;
}

.gs-history-query {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.gs-history-site {
    flex-shrink: 0;
    padding: 0.125rem 0.5rem;
    background: rgba(24, 23, 23, 0.06);
    border-radius: 6px;
    font-size: 0.6875rem;
    font-weight: 600;
    color: #181717;
}

.gs-history-time {
    flex-shrink: 0;
    font-size: 0.75rem;
    color: var(--text-light);
}

.gs-history-delete {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    border-radius: 6px;
    color: var(--text-light);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.gs-history-delete:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
}

/* 搜索技巧 */
.gs-tips-section {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1.5rem 3rem;
}

.gs-tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1rem;
}

.gs-tip-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.5rem;
    transition: all 0.2s ease;
}

.gs-tip-card:hover {
    border-color: #9CA3AF;
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.gs-tip-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.gs-tip-icon i {
    width: 22px;
    height: 22px;
}

.gs-tip-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.gs-tip-card p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.gs-tip-card code {
    padding: 0.125rem 0.375rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.75rem;
    font-family: 'Space Grotesk', monospace;
    color: #181717;
}

/* 响应式 */
@media (max-width: 640px) {
    .gs-search-box {
        flex-direction: column;
    }

    .gs-search-btn {
        justify-content: center;
        padding: 0.75rem;
    }

    .gs-search-card {
        padding: 1.5rem;
    }

    .gs-platforms {
        flex-direction: column;
        gap: 0.5rem;
    }

    .gs-platforms-label {
        padding-top: 0;
    }

    .gs-section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .gs-history-link {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.375rem;
    }

    .gs-history-time {
        font-size: 0.6875rem;
    }
}

/* ============================================================
   移动端全局适配（手机端）
   ============================================================ */

/* 汉堡菜单按钮 - 仅移动端显示 */
.nav-mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 38px;
    height: 38px;
    padding: 0 9px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    flex-shrink: 0;
}
.nav-mobile-toggle-bar {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}
.nav-mobile-toggle.active .nav-mobile-toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav-mobile-toggle.active .nav-mobile-toggle-bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.nav-mobile-toggle.active .nav-mobile-toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ===== 平板及以下：768px ===== */
@media (max-width: 768px) {
    /* 导航栏：启用汉堡菜单 */
    .nav-mobile-toggle {
        display: flex;
        order: 3;
    }
    .nav-container {
        padding: 0.75rem 1rem;
        flex-wrap: nowrap;
        gap: 0.5rem;
    }
    .logo {
        flex-shrink: 0;
    }
    .logo-text {
        font-size: 1.05rem;
    }
    .logo-icon {
        width: 34px;
        height: 34px;
    }
    .logo-icon i {
        width: 18px;
        height: 18px;
    }

    /* 导航链接折叠为下拉面板 */
    .nav-links {
        position: absolute;
        top: 100%;
        right: 0;
        left: 0;
        flex-direction: column;
        gap: 0;
        background: var(--bg-card);
        border-top: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
        padding: 0.5rem 0;
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        pointer-events: none;
        transition: max-height 0.3s ease, opacity 0.2s ease, padding 0.3s ease;
        z-index: 999;
    }
    .nav-links.nav-mobile-open {
        max-height: 360px;
        opacity: 1;
        pointer-events: auto;
        padding: 0.5rem 0;
    }
    .nav-link {
        display: block;
        padding: 0.85rem 1.5rem;
        font-size: 0.95rem;
        border-bottom: 1px solid rgba(226, 232, 240, 0.4);
    }
    .nav-link:last-child {
        border-bottom: none;
    }
    .nav-link.active::after {
        display: none;
    }
    .nav-link.active {
        background: rgba(59, 130, 246, 0.06);
    }

    /* 用户区域与暗色模式按钮紧凑化 */
    .nav-user-area {
        margin-left: auto;
        order: 2;
    }
    .nav-user-btn {
        gap: 0.4rem;
        padding: 0.35rem 0.6rem;
    }
    .nav-user-name {
        max-width: 90px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        font-size: 0.8rem;
    }
    .nav-user-dropdown {
        position: fixed;
        top: 60px;
        right: 0.75rem;
        left: auto;
        min-width: 240px;
        max-width: calc(100vw - 1.5rem);
    }
    .dark-mode-toggle {
        height: 34px !important;
        min-width: 34px !important;
        padding: 0 8px !important;
    }

    /* hero 区 */
    .hero {
        padding: 5rem 0 1.5rem;
    }
    .hero-title {
        font-size: 2rem;
        line-height: 1.15;
    }
    .hero-description {
        font-size: 0.95rem;
    }
    .hero-badge {
        font-size: 0.75rem;
        padding: 0.3rem 0.75rem;
    }
    .hero-search {
        padding: 0.7rem 1rem;
        gap: 0.5rem;
    }
    .hero-search input {
        font-size: 0.95rem;
    }

    main {
        padding: 0 1rem;
    }

    /* 工具卡片：平板两列，手机单列 */
    .tools-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    .tool-card {
        padding: 1.1rem;
        gap: 1rem;
    }

    /* 暗色模式按钮在 hero 内时定位调整 */
    section.hero > .dark-mode-toggle {
        position: absolute;
        top: 1rem;
        right: 1rem;
        z-index: 5;
    }

    /* 模态框适配 */
    .ai-modal-content {
        max-width: calc(100vw - 2rem) !important;
        margin: 0.5rem;
        max-height: 92vh;
    }
    .ai-modal-body {
        padding: 1rem;
    }
    .ai-modal-header {
        padding: 0.85rem 1rem;
    }
    .ai-modal-header h3 {
        font-size: 1.05rem;
    }

    /* 认证模态框 */
    .auth-modal-content {
        max-width: calc(100vw - 2rem) !important;
        margin: 0.5rem;
    }
    .auth-modal-body {
        padding: 1.25rem 1rem !important;
    }
    .auth-role-tabs {
        gap: 0.25rem;
    }
    .auth-role-tab {
        padding: 0.55rem 0.75rem;
        font-size: 0.85rem;
    }

    /* AI 对话页面 */
    .ai-chat-card {
        grid-template-columns: 1fr;
        min-height: 500px;
    }
    .ai-sidebar {
        height: auto;
        max-height: 220px;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    .ai-history-section {
        display: none;
    }
    .ai-main {
        height: 520px;
    }
    .ai-message {
        max-width: 95%;
    }
    .ai-message-bubble {
        font-size: 0.9rem;
    }
    .ai-input-area {
        padding: 0.6rem;
    }
    .ai-input-wrap textarea {
        font-size: 0.9rem;
    }

    /* 论坛工具栏：纵向堆叠 */
    .forum-toolbar {
        flex-direction: column;
        align-items: stretch;
    }
    .forum-search-wrap {
        min-width: 0;
    }
    .forum-toolbar-right {
        width: 100%;
        flex-wrap: wrap;
    }
    .forum-select {
        flex: 1;
        min-width: 0;
    }
    .forum-new-post-btn {
        flex: 1;
        justify-content: center;
    }

    /* 通用按钮组/操作区纵向堆叠 */
    .result-actions,
    .converter-actions,
    .btn-group {
        flex-direction: column;
        gap: 0.6rem;
    }
    .result-actions .btn-download,
    .result-actions .btn-secondary,
    .converter-actions button {
        width: 100%;
        justify-content: center;
    }

    /* 上传区紧凑化 */
    .upload-zone {
        padding: 1.5rem 0.75rem;
    }
    .upload-icon {
        width: 48px;
        height: 48px;
    }
    .upload-icon i {
        width: 24px;
        height: 24px;
    }
    .upload-text {
        font-size: 0.95rem;
    }
    .upload-hint {
        font-size: 0.8rem;
    }

    /* 卡片内边距收紧 */
    .converter-card,
    .feature-card,
    .step-card,
    .notice-card {
        padding: 1.25rem;
    }

    /* 预览容器（图片压缩等）单列 */
    .preview-container {
        grid-template-columns: 1fr;
    }

    /* 步骤容器纵向 */
    .steps-container {
        flex-direction: column;
        gap: 1.5rem;
    }
    .step-arrow {
        transform: rotate(90deg);
    }

    /* 关于卡片纵向 */
    .about-card {
        flex-direction: column;
        padding: 1.5rem 1.25rem;
    }
    .about-icon {
        margin: 0 auto;
    }

    /* section 标题 */
    .section-header h2 {
        font-size: 1.65rem;
    }

    /* 番茄钟布局：纵向堆叠 */
    .pm-body {
        grid-template-columns: 1fr !important;
    }
    .pm-timer-panel {
        border-right: none !important;
        border-bottom: 1px solid var(--border);
        padding: 1.5rem 1rem !important;
    }
    .pm-timer-wrap {
        width: 240px !important;
        height: 240px !important;
    }
    .pm-time {
        font-size: 2.75rem !important;
    }
    .pm-side-panel {
        padding: 1.25rem 1rem !important;
    }
    .pm-hero {
        padding: 5rem 0 1.5rem !important;
    }
    .pm-hero h1 {
        font-size: 1.85rem !important;
    }

    /* 网络测速布局 */
    .st-results-grid,
    .st-stats-row {
        grid-template-columns: 1fr !important;
    }

    /* 用户中心页面 */
    .profile-layout,
    .profile-grid {
        grid-template-columns: 1fr !important;
    }
    .profile-sidebar {
        position: static !important;
    }

    /* 管理员后台 */
    .admin-layout,
    .admin-grid {
        grid-template-columns: 1fr !important;
    }
    .admin-sidebar {
        position: static !important;
    }

    /* 网格类通用降级 */
    .stats-grid,
    .data-grid,
    .features-grid {
        grid-template-columns: 1fr 1fr !important;
    }

    /* Git 搜索 */
    .gs-engine-tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
    }
    .gs-engine-tab {
        white-space: nowrap;
        flex-shrink: 0;
    }
}

/* ===== 小屏手机：480px ===== */
@media (max-width: 480px) {
    .nav-container {
        padding: 0.6rem 0.75rem;
    }
    .logo-text {
        font-size: 0.95rem;
    }
    .nav-user-name {
        display: none;
    }
    .nav-user-btn i[data-lucide="chevron-down"] {
        display: none;
    }

    .hero {
        padding: 4.5rem 0 1.25rem;
    }
    .hero-title {
        font-size: 1.65rem;
    }
    .hero-description {
        font-size: 0.875rem;
    }
    .hero-search {
        padding: 0.6rem 0.85rem;
        border-radius: 12px;
    }
    .hero-search i {
        width: 18px;
        height: 18px;
    }
    .hero-search input {
        font-size: 0.875rem;
    }

    main {
        padding: 0 0.75rem;
    }

    .section-header h2 {
        font-size: 1.4rem;
    }

    .tool-card {
        padding: 1rem;
        gap: 0.85rem;
        border-radius: 16px;
    }
    .tool-card-icon {
        width: 44px !important;
        height: 44px !important;
    }
    .tool-card-icon i {
        width: 20px !important;
        height: 20px !important;
    }
    .tool-card-title {
        font-size: 0.95rem;
    }
    .tool-card-desc {
        font-size: 0.78rem;
    }

    /* 统计网格在小屏强制单列 */
    .stats-grid,
    .data-grid,
    .features-grid,
    .pm-stats {
        grid-template-columns: 1fr !important;
    }

    /* 番茄钟进一步缩小 */
    .pm-timer-wrap {
        width: 200px !important;
        height: 200px !important;
    }
    .pm-time {
        font-size: 2.25rem !important;
    }
    .pm-mode-tab {
        padding: 0.4rem 0.85rem;
        font-size: 0.78rem;
    }
    .pm-btn {
        height: 42px;
        padding: 0 1.1rem;
        font-size: 0.875rem;
    }
    .pm-btn-primary {
        min-width: 110px;
    }

    /* 模态框标题 */
    .ai-modal-header h3 {
        font-size: 1rem;
    }

    /* 论坛帖子卡片紧凑化 */
    .forum-post-card {
        padding: 1rem;
    }
    .forum-post-title {
        font-size: 0.975rem;
    }
    .forum-post-preview {
        font-size: 0.8rem;
        -webkit-line-clamp: 3;
    }
    .forum-post-stats {
        gap: 0.75rem;
    }

    /* 发帖/详情模态框全屏化 */
    #newPostModal .ai-modal-content,
    #postDetailModal .ai-modal-content {
        max-width: 100% !important;
        margin: 0 !important;
        height: 100vh;
        max-height: 100vh;
        border-radius: 0 !important;
    }
    #newPostModal .ai-modal-body,
    #postDetailModal .ai-modal-body {
        flex: 1;
        overflow-y: auto;
    }

    /* 暗色模式按钮位置 */
    section.hero > .dark-mode-toggle {
        top: 0.6rem;
        right: 0.6rem;
    }

    /* 上传区进一步紧凑 */
    .upload-zone {
        padding: 1.25rem 0.5rem;
    }

    /* 短cuts chips 滚动 */
    .shortcut-chips {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 0.5rem;
    }
    .shortcut-chip {
        flex-shrink: 0;
    }

    /* 字体缩小：消息、设置输入 */
    .ai-message-bubble,
    .ai-setting-input,
    .forum-search-input,
    .forum-select {
        font-size: 0.825rem;
    }
}

/* ===== 超小屏：360px ===== */
@media (max-width: 360px) {
    .hero-title {
        font-size: 1.45rem;
    }
    .logo-text {
        font-size: 0.85rem;
    }
    .tool-card {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
    }
    .pm-timer-wrap {
        width: 180px !important;
        height: 180px !important;
    }
    .pm-time {
        font-size: 2rem !important;
    }
}

/* ===== 横屏手机优化 ===== */
@media (max-width: 900px) and (orientation: landscape) and (max-height: 500px) {
    .hero {
        padding: 4rem 0 1rem;
    }
    .hero-title {
        font-size: 1.75rem;
    }
    .ai-main {
        height: 400px;
    }
    .ai-sidebar {
        max-height: 160px;
    }
}

/* 触摸设备：禁用 hover 上浮效果，避免粘滞 */
@media (hover: none) {
    .tool-card:not(.tool-card-coming):hover,
    .forum-post-card:hover,
    .feature-card:hover {
        transform: none;
    }
    .tool-card .tool-fav-btn {
        opacity: 1;
    }
}

/* ===== 首页热门工具区块 ===== */
.tb-hot-wrap {
    padding: 1.25rem 0 0.5rem;
}
.tb-hot-head {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    margin-bottom: 1rem;
}
.tb-hot-head h2 {
    font-size: 1.35rem;
    margin: 0;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}
.tb-hot-head h2 i {
    width: 20px;
    height: 20px;
    color: var(--primary-light);
}
.tb-hot-head p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin: 0;
}
.tb-hot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 0.85rem;
}
.tb-hot-card {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 0.85rem 1rem;
    text-decoration: none;
    color: inherit;
    transition: all 0.25s ease;
}
.tb-hot-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: rgba(59, 130, 246, 0.3);
}
.tb-hot-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: rgba(217, 119, 6, 0.12);
    color: #D97706;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.tb-hot-icon i {
    width: 20px;
    height: 20px;
}
.tb-hot-info {
    flex: 1;
    min-width: 0;
}
.tb-hot-info b {
    display: block;
    font-size: 0.92rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.tb-hot-info span {
    font-size: 0.75rem;
    color: var(--text-secondary);
}
.tb-hot-rank {
    font-size: 1.1rem;
    font-weight: 700;
    color: rgba(217, 119, 6, 0.5);
    font-family: 'Space Grotesk', sans-serif;
}

/* ===== 工具页底部相关推荐 ===== */
.tb-related-wrap {
    padding: 0.5rem 0 2.5rem;
}
.tb-related-title {
    font-size: 1.15rem;
    margin: 0 0 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.tb-related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 0.85rem;
}
.tb-related-card {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 0.85rem 1rem;
    text-decoration: none;
    color: inherit;
    transition: all 0.25s ease;
}
.tb-related-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: rgba(59, 130, 246, 0.3);
}
.tb-related-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: rgba(16, 185, 129, 0.12);
    color: #10B981;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.tb-related-icon i {
    width: 20px;
    height: 20px;
}
.tb-related-info {
    flex: 1;
    min-width: 0;
}
.tb-related-info b {
    display: block;
    font-size: 0.92rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.tb-related-info span {
    font-size: 0.75rem;
    color: var(--text-secondary);
}
.tb-related-arrow {
    width: 16px;
    height: 16px;
    color: var(--text-secondary);
    flex-shrink: 0;
}