/* ==========================================
   Clipboard Landing Pages - Global Styles
   ========================================== */

/* CSS Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Brand Colors */
    --primary: #1E3A5F;
    --primary-light: #2C5282;
    --primary-dark: #1A2D47;
    --secondary: #2D7D46;
    --accent: #C9A84C;
    --accent-light: #D4B866;
    
    /* Neutrals */
    --bg: #F8FAFC;
    --bg-white: #FFFFFF;
    --text: #1E293B;
    --text-secondary: #64748B;
    --text-muted: #94A3B8;
    --border: #E2E8F0;
    --border-light: #F1F5F9;
    
    /* Typography */
    --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    
    /* Spacing */
    --container-width: 1200px;
    --section-padding: 80px 0;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    
    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ==========================================
   Navigation Bar
   ========================================== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 0;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
    font-size: 1.2rem;
}

.logo span {
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    padding: 6px 0;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 4px 8px;
}

.mobile-menu {
    display: none;
    flex-direction: column;
    background: white;
    border-top: 1px solid var(--border);
    padding: 12px 20px;
}

.mobile-menu.active {
    display: flex;
}

.mobile-menu a {
    padding: 10px 0;
    text-decoration: none;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-light);
}

/* ==========================================
   Buttons
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    transition: all 0.25s ease;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    box-shadow: 0 4px 14px rgba(79,70,229,0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79,70,229,0.45);
}

.btn-secondary {
    background: white;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary:hover {
    background: var(--primary);
    color: white;
}

.btn-outline {
    background: transparent;
    color: white;
    border: 2px solid rgba(255,255,255,0.5);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.15);
    border-color: white;
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.05rem;
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.875rem;
}

/* ==========================================
   Section Headers
   ========================================== */
.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-header h2 {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 12px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    background: linear-gradient(135deg, #EEF2FF 0%, #F0FDF4 50%, #FEF3C7 100%);
    padding: 80px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(79,70,229,0.05) 0%, transparent 50%),
                radial-gradient(circle at 70% 30%, rgba(16,185,129,0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero-badge {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 6px 18px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--text);
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 680px;
    margin: 0 auto 32px;
    line-height: 1.8;
}

.hero-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 48px;
    justify-content: center;
}

.stat {
    text-align: center;
}

.stat-num {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ==========================================
   Features Section
   ========================================== */
.features {
    padding: var(--section-padding);
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    background: var(--bg);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
}

.feature-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    font-size: 1.6rem;
    color: white;
}

.feature-icon i {
    margin: 0;
}

.feature-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text);
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================
   Screenshots Section
   ========================================== */
.screenshots {
    padding: var(--section-padding);
    background: var(--bg);
}

.screenshot-showcase {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.screenshot-card {
    text-align: center;
}

.screenshot-placeholder {
    background: linear-gradient(135deg, #E0E7FF, #DCFCE7);
    border-radius: var(--radius-lg);
    height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
    border: 2px dashed #CBD5E1;
    margin-bottom: 12px;
    transition: all 0.3s;
}

.screenshot-card:hover .screenshot-placeholder {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

.screenshot-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* ==========================================
   Scenarios Section
   ========================================== */
.scenarios {
    padding: var(--section-padding);
    background: white;
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.scenario-item {
    background: var(--bg);
    border-radius: var(--radius-lg);
    padding: 28px;
    border: 1px solid var(--border-light);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

.scenario-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.scenario-item:hover {
    border-color: var(--primary-light);
}

.scenario-item h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text);
}

.scenario-item p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================
   Comparison Section
   ========================================== */
.comparison {
    padding: var(--section-padding);
    background: var(--bg);
}

.comparison-table {
    max-width: 900px;
    margin: 0 auto;
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.comparison-table thead {
    background: var(--primary);
    color: white;
}

.comparison-table th {
    padding: 16px 20px;
    text-align: left;
    font-weight: 700;
    font-size: 1rem;
}

.comparison-table td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-light);
    font-size: 0.95rem;
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.comparison-table tbody tr:hover {
    background: #F8FAFC;
}

/* ==========================================
   Testimonials Section
   ========================================== */
.testimonials {
    padding: var(--section-padding);
    background: white;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.testimonial-card {
    background: var(--bg);
    border-radius: var(--radius-lg);
    padding: 28px;
    border: 1px solid var(--border-light);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

.testimonial-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.stars {
    color: #F59E0B;
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.testimonial-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
    font-style: italic;
}

.testimonial-author {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* ==========================================
   CTA Section
   ========================================== */
.cta {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    text-align: center;
}

.cta h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.cta p {
    font-size: 1.1rem;
    margin-bottom: 32px;
    opacity: 0.9;
}

.cta-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    background: #1E293B;
    color: #94A3B8;
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}

.footer-col h4 {
    color: white;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-col p {
    font-size: 0.875rem;
    line-height: 1.7;
    margin-bottom: 12px;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 8px;
}

.footer-col ul li a {
    color: #94A3B8;
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s;
}

.footer-col ul li a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: 16px;
    margin-top: 12px;
}

.social-links a {
    color: #94A3B8;
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s;
}

.social-links a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 20px 0;
    text-align: center;
    font-size: 0.8rem;
}

.footer-bottom a {
    color: #94A3B8;
    text-decoration: none;
}

.footer-bottom a:hover {
    color: white;
}

/* ==========================================
   Download Page Specific
   ========================================== */
.download-hero {
    background: linear-gradient(135deg, #EEF2FF, #F0FDF4);
    padding: 60px 0;
    text-align: center;
}

.download-hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.download-hero p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 32px;
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin: 60px 0;
}

.platform-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: 40px 32px;
    text-align: center;
    border: 2px solid var(--border);
    transition: all 0.3s;
}

.platform-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.platform-card.featured {
    border-color: var(--primary);
    position: relative;
}

.platform-card.featured::before {
    content: '推荐';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 4px 16px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
}

.platform-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 2rem;
    color: white;
}

.platform-icon i {
    margin: 0;
}

.platform-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.platform-card .version {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 16px;
}

.platform-card .size {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 24px;
}

.version-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 60px 0;
}

.version-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 28px;
    text-align: center;
    border: 1px solid var(--border-light);
    transition: all 0.3s;
}

.version-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.version-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.version-card .price {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 16px;
}

.version-card .price span {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-muted);
}

.version-card ul {
    list-style: none;
    text-align: left;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.version-card ul li {
    padding: 6px 0;
    border-bottom: 1px solid var(--border-light);
}

.version-card ul li:last-child {
    border-bottom: none;
}

/* ==========================================
   Modal
   ========================================== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: white;
    border-radius: var(--radius-xl);
    padding: 40px;
    max-width: 560px;
    width: 90%;
    text-align: center;
    animation: modalIn 0.3s ease;
    position: relative;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

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

.modal h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.modal p {
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.qr-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.qr-item {
    background: var(--bg);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.qr-box {
    width: 180px;
    height: 180px;
    margin: 0 auto 16px;
    background: var(--text);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.9rem;
}
.qr-box img{max-width:100%;}
.qr-item h4 {
    font-size: 1rem;
    margin-bottom: 4px;
}

.qr-item p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0;
}

/* ==========================================
   Support Page
   ========================================== */
.support-hero {
    background: linear-gradient(135deg, #F0FDF4, #EEF2FF);
    padding: 60px 0;
    text-align: center;
}

.support-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin: 60px 0;
}

.support-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--border-light);
    display: flex;
    gap: 20px;
    transition: all 0.3s;
}

.support-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.support-card-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.support-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
}

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

.support-card a {
    display: inline-block;
    margin-top: 12px;
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    font-size: 0.9rem;
}

.support-card a:hover {
    text-decoration: underline;
}

.faq-section {
    padding: 80px 0;
    background: white;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 20px 24px;
    text-align: left;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.2s;
}

.faq-question:hover {
    background: var(--bg);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary);
    transition: transform 0.3s;
}

.faq-item.open .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    display: none;
    padding: 0 24px 20px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.faq-item.open .faq-answer {
    display: block;
}

.contact-banner {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-xl);
    padding: 48px;
    text-align: center;
    color: white;
    margin: 60px 0;
}

.contact-banner h2 {
    font-size: 2rem;
    margin-bottom: 12px;
}

.contact-banner p {
    opacity: 0.9;
    margin-bottom: 28px;
}

/* ==========================================
   Docs Page
   ========================================== */
.docs-hero {
    background: linear-gradient(135deg, #FEF3C7, #EEF2FF);
    padding: 60px 0;
    text-align: center;
}

.docs-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 40px;
    padding: 60px 0;
    align-items: start;
}

.docs-sidebar {
    position: sticky;
    top: 80px;
    background: white;
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid var(--border-light);
}

.docs-sidebar h4 {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}

.docs-sidebar ul {
    list-style: none;
}

.docs-sidebar ul li {
    margin-bottom: 4px;
}

.docs-sidebar ul li a {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.docs-sidebar ul li a i {
    margin-right: 8px;
    width: 16px;
    text-align: center;
}

.docs-sidebar ul li a:hover,
.docs-sidebar ul li a.active {
    background: var(--bg);
    color: var(--primary);
}

.docs-content {
    background: white;
    border-radius: var(--radius-lg);
    padding: 48px;
    border: 1px solid var(--border-light);
}

.docs-content h1 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.docs-content .docs-meta {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 32px;
}

.docs-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 40px 0 16px;
    padding-top: 20px;
    border-top: 1px solid var(--border-light);
}

.docs-content h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin: 28px 0 12px;
}

.docs-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.docs-content ul {
    padding-left: 24px;
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.docs-content ul li {
    margin-bottom: 8px;
}

.docs-content pre {
    background: #1E293B;
    color: #E2E8F0;
    border-radius: var(--radius-md);
    padding: 20px;
    overflow-x: auto;
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 20px;
}

.docs-content code {
    background: var(--bg);
    color: var(--primary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.9em;
}

.docs-content pre code {
    background: none;
    color: inherit;
    padding: 0;
}

.doc-callout {
    background: linear-gradient(135deg, #EEF2FF, #F0FDF4);
    border-left: 4px solid var(--primary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: 16px 20px;
    margin: 20px 0;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.doc-callout strong {
    color: var(--primary);
}

.docs-nav {
    display: flex;
    justify-content: space-between;
    padding-top: 32px;
    margin-top: 40px;
    border-top: 1px solid var(--border-light);
}

.docs-nav a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 10px 20px;
    border: 1px solid var(--primary);
    border-radius: var(--radius-md);
    transition: all 0.2s;
}

.docs-nav a:hover {
    background: var(--primary);
    color: white;
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .platform-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .docs-layout {
        grid-template-columns: 1fr;
    }
    
    .docs-sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-stats {
        gap: 24px;
    }
    
    .stat-num {
        font-size: 1.5rem;
    }
    
    .features-grid,
    .screenshot-showcase,
    .testimonials-grid,
    .platform-grid {
        grid-template-columns: 1fr;
    }
    
    .scenarios-grid,
    .support-grid {
        grid-template-columns: 1fr;
    }
    
    .version-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .comparison-table {
        font-size: 0.85rem;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 10px 12px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .qr-grid {
        grid-template-columns: 1fr;
    }
    
    .cta h2 {
        font-size: 1.8rem;
    }
    
    .docs-content {
        padding: 24px;
    }
    
    .contact-banner {
        padding: 32px 20px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 50px 0 60px;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-desc {
        font-size: 1rem;
    }
    
    .hero-btns {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-btns .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .version-grid {
        grid-template-columns: 1fr;
    }
    
    .modal {
        padding: 28px 20px;
    }
    
    .qr-box {
        width: 140px;
        height: 140px;
    }
}

/* ==========================================
   Utility Classes
   ========================================== */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.bg-white { background: white; }
.mt-60 { margin-top: 60px; }
.mb-20 { margin-bottom: 20px; }

/* ==========================================
   SEO Microdata placeholders (hidden)
   ========================================== */
.breadcrumb {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.breadcrumb a {
    color: var(--primary);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb span {
    margin: 0 8px;
}
/* ==========================================
   Font Awesome Icon Customizations
   ========================================== */
   
/* 通用图标样式 */
.scenario-item h3 i,
.doc-callout strong i {
    margin-right: 8px;
    width: 20px;
    text-align: center;
}

/* 文档页导航箭头 */
.docs-nav a i {
    margin: 0 4px;
}

/* 品牌色图标 */
.feature-icon i,
.platform-icon i {
    color: white;
}