:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --primary-light: #dbeafe;
    --secondary-color: #64748b;
    --text-color: #1e293b;
    --text-light: #64748b;
    --bg-color: #ffffff;
    --bg-light: #f8fafc;
    --bg-dark: #0f172a;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius: 8px;
    --radius-lg: 12px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

a:hover {
    color: var(--primary-hover);
}

img {
    max-width: 100%;
    height: auto;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
}

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

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    color: var(--text-light);
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

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

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 2px;
    background: var(--text-color);
    border-radius: 2px;
    transition: var(--transition);
}

.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    max-width: 560px;
}

.hero-badge {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary-color);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 20px;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--text-color) 0%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 30px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn svg {
    width: 20px;
    height: 20px;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

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

.btn-large {
    padding: 16px 32px;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
}

.hero-features {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-light);
    font-size: 0.9rem;
}

.hero-feature svg {
    width: 18px;
    height: 18px;
    color: var(--success-color);
}

.hero-image {
    display: flex;
    justify-content: center;
}

.screenshot-wrapper {
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    width: 100%;
    max-width: 500px;
}

.screenshot-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red {
    background: #ef4444;
}

.dot.yellow {
    background: #f59e0b;
}

.dot.green {
    background: #10b981;
}

.screenshot-title {
    margin-left: auto;
    font-size: 0.875rem;
    color: var(--text-light);
}

.screenshot-content {
    padding: 20px;
}

.download-status {
    margin-bottom: 20px;
}

.status-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.status-label {
    color: var(--text-light);
}

.status-value {
    font-weight: 600;
}

.speed-bars {
    display: flex;
    gap: 20px;
}

.speed-bar {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 8px 16px;
    background: var(--bg-light);
    border-radius: var(--radius);
}

.speed-bar.download {
    color: var(--success-color);
}

.speed-bar.upload {
    color: var(--primary-color);
}

.arrow {
    font-size: 1.2rem;
}

.speed {
    font-weight: 600;
}

.download-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.download-item {
    display: flex;
    gap: 12px;
    padding: 12px;
    background: var(--bg-light);
    border-radius: var(--radius);
}

.item-icon {
    font-size: 1.5rem;
}

.item-info {
    flex: 1;
}

.item-name {
    font-weight: 500;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.item-progress {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.progress-bar {
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--primary-color);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.progress-fill.complete {
    background: var(--success-color);
}

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

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 15px;
}

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

.features-section {
    padding: 80px 0;
    background: var(--bg-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px;
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-5px);
}

.feature-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: var(--radius);
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 30px;
    height: 30px;
    color: var(--primary-color);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.6;
}

.platforms-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.platform-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
}

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

.platform-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    border-radius: 50%;
    margin: 0 auto 15px;
}

.platform-icon svg {
    width: 30px;
    height: 30px;
    color: var(--primary-color);
}

.platform-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 5px;
}

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

.steps-section {
    padding: 80px 0;
    background: var(--bg-color);
}

.steps-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

.step-card {
    flex: 1;
    max-width: 280px;
    text-align: center;
    padding: 30px;
    background: var(--bg-light);
    border-radius: var(--radius-lg);
}

.step-number {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    border-radius: 50%;
    margin: 0 auto 15px;
}

.step-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 10px;
}

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

.step-arrow {
    color: var(--border-color);
}

.step-arrow svg {
    width: 30px;
    height: 30px;
}

.steps-note {
    text-align: center;
    margin-top: 30px;
    padding: 15px;
    background: var(--bg-light);
    border-radius: var(--radius);
}

.steps-note code {
    background: var(--primary-light);
    color: var(--primary-color);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
}

.stats-section {
    padding: 60px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, #1d4ed8 100%);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.stat-card {
    text-align: center;
    color: white;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

.compare-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.compare-table-wrapper {
    overflow-x: auto;
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.compare-table th,
.compare-table td {
    padding: 15px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.compare-table th {
    background: var(--bg-light);
    font-weight: 600;
}

.compare-table th:first-child,
.compare-table td:first-child {
    text-align: left;
}

.compare-table tbody tr:hover {
    background: var(--bg-light);
}

.check {
    color: var(--success-color);
    font-size: 1.25rem;
}

.cross {
    color: var(--danger-color);
    font-size: 1.25rem;
}

.partial {
    color: var(--text-light);
    font-size: 0.85rem;
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.badge-high {
    background: #dcfce7;
    color: #16a34a;
}

.badge-medium {
    background: #fef3c7;
    color: #d97706;
}

.badge-low {
    background: #dbeafe;
    color: #2563eb;
}

.badge-good {
    background: #dcfce7;
    color: #16a34a;
}

.badge-bad {
    background: #fee2e2;
    color: #dc2626;
}

.download-cta {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1e3a5f 100%);
}

.cta-content {
    text-align: center;
    color: white;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.cta-content p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 30px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.cta-buttons .btn-primary {
    background: white;
    color: var(--primary-color);
}

.cta-buttons .btn-primary:hover {
    background: var(--bg-light);
}

.cta-buttons .btn-secondary {
    background: transparent;
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
}

.cta-buttons .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
}

.faq-preview {
    padding: 80px 0;
    background: var(--bg-color);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.faq-item {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 25px;
}

.faq-item h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.faq-item p {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.6;
}

.faq-more {
    text-align: center;
    margin-top: 30px;
}

.footer {
    background: var(--bg-dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
    margin-bottom: 15px;
}

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

.footer-logo .logo-icon {
    width: 28px;
    height: 28px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

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

.footer-column li {
    margin-bottom: 10px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
    margin-bottom: 5px;
}

.page-header {
    padding: 140px 0 60px;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

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

.download-section {
    padding: 60px 0;
}

.version-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.version-tab {
    padding: 12px 24px;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.version-tab:hover {
    border-color: var(--primary-color);
}

.version-tab.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.version-content {
    display: none;
}

.version-content.active {
    display: block;
}

.version-intro {
    text-align: center;
    margin-bottom: 40px;
}

.version-intro h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.version-intro p {
    color: var(--text-light);
}

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

.download-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

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

.download-card-header {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
}

.os-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-color);
    border-radius: var(--radius);
}

.os-icon svg {
    width: 28px;
    height: 28px;
    color: var(--primary-color);
}

.os-icon.windows svg {
    color: #0078d4;
}

.os-icon.macos svg {
    color: #000000;
}

.os-icon.linux svg {
    color: #f57900;
}

.os-info h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.os-info p {
    font-size: 0.85rem;
    color: var(--text-light);
}

.download-card-body {
    padding: 20px;
}

.file-info {
    margin-bottom: 20px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
}

.info-item:last-child {
    border-bottom: none;
}

.info-label {
    color: var(--text-light);
}

.info-value {
    font-weight: 500;
}

.status-safe {
    color: var(--success-color);
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.other-downloads {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.other-download-card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 25px;
}

.other-download-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.other-download-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.version-badge {
    display: inline-block;
    padding: 4px 10px;
    background: var(--primary-light);
    color: var(--primary-color);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

.other-download-card > p {
    color: var(--text-light);
    margin-bottom: 15px;
}

.other-download-info {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.other-download-info span {
    font-size: 0.85rem;
    color: var(--text-light);
}

.linux-packages {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 30px;
}

.linux-packages h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.package-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.package-item {
    background: var(--bg-color);
    border-radius: var(--radius);
    padding: 15px;
}

.package-item h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.package-item code {
    display: block;
    background: var(--bg-dark);
    color: #a5f3fc;
    padding: 10px;
    border-radius: var(--radius);
    font-size: 0.85rem;
    overflow-x: auto;
}

.download-help {
    padding: 60px 0;
    background: var(--bg-light);
}

.download-help h2 {
    text-align: center;
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 40px;
}

.help-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.help-item {
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    padding: 25px;
    text-align: center;
}

.help-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: 50%;
    margin: 0 auto 15px;
}

.help-icon svg {
    width: 24px;
    height: 24px;
    color: var(--primary-color);
}

.help-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.help-item p {
    color: var(--text-light);
    font-size: 0.9rem;
}

.help-note {
    text-align: center;
    padding: 20px;
    background: var(--primary-light);
    border-radius: var(--radius);
    color: var(--primary-color);
}

.changelog-section {
    padding: 60px 0;
}

.changelog-timeline {
    max-width: 800px;
    margin: 0 auto;
}

.changelog-item {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-bottom: 20px;
    overflow: hidden;
}

.changelog-item.latest {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.changelog-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
}

.version-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.version-number {
    font-size: 1.25rem;
    font-weight: 700;
}

.version-badge.latest {
    background: var(--success-color);
    color: white;
}

.release-date {
    color: var(--text-light);
}

.changelog-content {
    padding: 20px;
}

.changelog-category {
    margin-bottom: 20px;
}

.changelog-category:last-child {
    margin-bottom: 0;
}

.changelog-category h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.changelog-category ul {
    list-style: none;
}

.changelog-category li {
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
    color: var(--text-light);
}

.changelog-category li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.changelog-note {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 30px;
    margin-top: 40px;
}

.changelog-note h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.changelog-note ul {
    list-style: none;
    margin-bottom: 15px;
}

.changelog-note li {
    padding: 8px 0;
}

.changelog-note p {
    color: var(--text-light);
}

.tutorial-section {
    padding: 60px 0;
}

.tutorial-nav {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 30px;
}

.tutorial-nav h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.tutorial-nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.tutorial-nav a {
    color: var(--text-light);
    font-weight: 500;
}

.tutorial-nav a:hover {
    color: var(--primary-color);
}

.tutorial-article {
    margin-bottom: 60px;
}

.tutorial-article h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--primary-color);
}

.tutorial-step {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.step-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    color: white;
    font-size: 1.25rem;
    font-weight: 700;
    border-radius: 50%;
}

.step-content {
    flex: 1;
}

.step-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.step-content p {
    color: var(--text-light);
    margin-bottom: 15px;
}

.step-content ol,
.step-content ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

.step-content li {
    margin-bottom: 8px;
    color: var(--text-light);
}

.step-note,
.step-tip,
.step-warning {
    padding: 15px;
    border-radius: var(--radius);
    margin-top: 15px;
}

.step-note {
    background: var(--primary-light);
    color: var(--primary-color);
}

.step-tip {
    background: #dcfce7;
    color: #16a34a;
}

.step-warning {
    background: #fee2e2;
    color: #dc2626;
}

.code-block {
    background: var(--bg-dark);
    border-radius: var(--radius);
    padding: 15px;
    overflow-x: auto;
    margin: 15px 0;
}

.code-block code {
    color: #a5f3fc;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    white-space: pre;
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.tip-card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 25px;
}

.tip-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.tip-card ul {
    list-style: none;
}

.tip-card li {
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
    color: var(--text-light);
}

.tip-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
}

.tip-card kbd {
    display: inline-block;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 2px 6px;
    font-family: monospace;
    font-size: 0.85rem;
}

.faq-section {
    padding: 60px 0;
}

.faq-categories {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.faq-category {
    padding: 10px 20px;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.faq-category:hover {
    border-color: var(--primary-color);
}

.faq-category.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-bottom: 15px;
    overflow: hidden;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    cursor: pointer;
    transition: var(--transition);
}

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

.faq-question h3 {
    font-size: 1rem;
    font-weight: 600;
}

.faq-toggle {
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    transition: var(--transition);
}

.faq-toggle svg {
    width: 20px;
    height: 20px;
}

.faq-item.active .faq-toggle {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding: 0 20px 20px;
}

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

.faq-answer p {
    color: var(--text-light);
    margin-bottom: 15px;
}

.faq-answer ol,
.faq-answer ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

.faq-answer li {
    margin-bottom: 8px;
    color: var(--text-light);
}

.faq-answer table {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0;
}

.compare-table-small th,
.compare-table-small td {
    padding: 10px;
    border: 1px solid var(--border-color);
    text-align: left;
}

.compare-table-small th {
    background: var(--bg-light);
    font-weight: 600;
}

.features-detail-section {
    padding: 60px 0;
}

.feature-detail {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 40px;
    margin-bottom: 60px;
    align-items: start;
}

.feature-detail.reverse {
    grid-template-columns: 1fr 100px;
}

.feature-detail.reverse .feature-detail-icon {
    order: 2;
}

.feature-detail-icon {
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: var(--radius-lg);
}

.feature-detail-icon svg {
    width: 50px;
    height: 50px;
    color: var(--primary-color);
}

.feature-detail-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.feature-detail-content > p {
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.8;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 10px 0;
    padding-left: 25px;
    position: relative;
    color: var(--text-light);
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

    .hero-buttons {
        justify-content: center;
    }

    .hero-features {
        justify-content: center;
    }

    .hero-image {
        order: -1;
    }

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

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

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

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

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }

    .feature-detail {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .feature-detail.reverse {
        grid-template-columns: 1fr;
    }

    .feature-detail-icon {
        margin: 0 auto;
    }

    .feature-detail.reverse .feature-detail-icon {
        order: 0;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-color);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links a {
        display: block;
        padding: 15px 0;
    }

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

    .hero {
        padding: 120px 0 60px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .platforms-grid {
        grid-template-columns: 1fr;
    }

    .steps-grid {
        flex-direction: column;
    }

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

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

    .stat-number {
        font-size: 2rem;
    }

    .compare-table {
        font-size: 0.85rem;
    }

    .compare-table th,
    .compare-table td {
        padding: 10px;
    }

    .faq-grid {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .page-header {
        padding: 120px 0 40px;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .download-grid {
        grid-template-columns: 1fr;
    }

    .other-downloads {
        grid-template-columns: 1fr;
    }

    .package-list {
        grid-template-columns: 1fr;
    }

    .help-grid {
        grid-template-columns: 1fr;
    }

    .tips-grid {
        grid-template-columns: 1fr;
    }

    .tutorial-step {
        flex-direction: column;
    }

    .step-number {
        margin-bottom: 10px;
    }

    .section-header h2 {
        font-size: 1.75rem;
    }

    .cta-content h2 {
        font-size: 1.75rem;
    }

    .cta-buttons {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

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

    .btn-large {
        padding: 14px 24px;
        font-size: 1rem;
    }

    .screenshot-wrapper {
        margin: 0 -15px;
        border-radius: 0;
    }
}

.breadcrumb {
    padding: 85px 20px 15px;
    background: var(--bg-light);
}

.breadcrumb ol {
    display: flex;
    align-items: center;
    list-style: none;
    flex-wrap: wrap;
    gap: 8px;
}

.breadcrumb li {
    display: flex;
    align-items: center;
    font-size: 0.9rem;
}

.breadcrumb li:not(:last-child)::after {
    content: '/';
    margin-left: 8px;
    color: var(--text-light);
}

.breadcrumb a {
    color: var(--text-light);
}

.breadcrumb a:hover {
    color: var(--primary-color);
}

.breadcrumb li:last-child span {
    color: var(--text-color);
    font-weight: 500;
}

.download-intro {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 30px;
    margin-bottom: 40px;
}

.download-intro h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.download-intro > p {
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.8;
}

.download-highlights {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.download-highlights li {
    padding: 10px 15px;
    background: var(--bg-color);
    border-radius: var(--radius);
    font-size: 0.9rem;
}

.download-highlights strong {
    color: var(--primary-color);
}

.linux-packages {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 30px;
    margin-top: 40px;
}

.linux-packages h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.linux-packages > p {
    color: var(--text-light);
    margin-bottom: 20px;
}

.package-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.package-item {
    background: var(--bg-color);
    border-radius: var(--radius);
    padding: 15px;
}

.package-item h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.package-item code {
    display: block;
    background: var(--bg-dark);
    color: #a5f3fc;
    padding: 10px;
    border-radius: var(--radius);
    font-size: 0.85rem;
    overflow-x: auto;
}

.download-help {
    margin-top: 60px;
}

.download-help h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 30px;
}

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

.help-item {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 25px;
    text-align: center;
}

.help-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: 50%;
    margin: 0 auto 15px;
}

.help-icon svg {
    width: 24px;
    height: 24px;
    color: var(--primary-color);
}

.help-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.help-item p {
    color: var(--text-light);
    font-size: 0.9rem;
}

.download-notice {
    background: #fef3c7;
    border-radius: var(--radius-lg);
    padding: 25px;
    margin-top: 40px;
}

.download-notice h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #92400e;
}

.download-notice ul {
    list-style: none;
}

.download-notice li {
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
    color: #78350f;
}

.download-notice li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #d97706;
}

.download-notice a {
    color: #92400e;
    text-decoration: underline;
}

.related-links {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 25px;
    margin-top: 40px;
}

.related-links h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.related-links ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.related-links a {
    display: block;
    padding: 10px 15px;
    background: var(--bg-color);
    border-radius: var(--radius);
    color: var(--text-color);
}

.related-links a:hover {
    background: var(--primary-light);
    color: var(--primary-color);
}

.version-notice {
    background: #e0f2fe;
    border-radius: var(--radius-lg);
    padding: 20px 25px;
    margin-bottom: 30px;
    border-left: 4px solid var(--primary-color);
}

.version-notice h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.version-notice p {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 5px;
}

.version-select {
    margin-bottom: 20px;
}

.version-select label {
    font-weight: 500;
    margin-right: 10px;
}

.version-dropdown {
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 0.95rem;
    background: var(--bg-color);
    cursor: pointer;
    min-width: 200px;
}

.version-dropdown:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.download-sources {
    margin-top: 20px;
}

.download-sources h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-light);
}

.source-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.source-buttons .btn {
    flex: 1;
    min-width: 120px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 16px;
    font-size: 0.9rem;
}

.source-buttons .btn svg {
    width: 18px;
    height: 18px;
}

.btn-baidu {
    background: #06a7ff;
    color: white;
    border-color: #06a7ff;
}

.btn-baidu:hover {
    background: #0590df;
    color: white;
}

.btn-quark {
    background: #ff6b00;
    color: white;
    border-color: #ff6b00;
}

.btn-quark:hover {
    background: #e05f00;
    color: white;
}

.cloud-icon {
    font-size: 1.1rem;
}

.source-note {
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--text-light);
}

.source-note code {
    background: var(--bg-light);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
    color: var(--primary-color);
}

@media (max-width: 768px) {
    .breadcrumb {
        padding: 85px 15px 15px;
    }

    .download-highlights {
        grid-template-columns: 1fr;
    }

    .package-list {
        grid-template-columns: 1fr;
    }

    .help-grid {
        grid-template-columns: 1fr;
    }

    .related-links ul {
        grid-template-columns: 1fr;
    }

    .source-buttons {
        flex-direction: column;
    }

    .source-buttons .btn {
        width: 100%;
    }

    .version-dropdown {
        width: 100%;
    }
}