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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f7fa;
}

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

.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo h1 {
    font-size: 28px;
    color: #10b981;
    font-weight: 700;
}

.logo .tagline {
    font-size: 12px;
    color: #666;
    margin-left: 10px;
}

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

.nav a {
    text-decoration: none;
    color: #666;
    font-weight: 500;
    transition: color 0.3s;
}

.nav a:hover,
.nav a.active {
    color: #10b981;
}

.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: 3px;
    background: #333;
    transition: 0.3s;
}

.hero {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #fff;
    padding: 80px 0;
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-content {
    flex: 1;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 40px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: #fff;
    color: #10b981;
}

.btn-primary:hover {
    background: #f0f0f0;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

.btn-large {
    padding: 16px 40px;
    font-size: 18px;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    opacity: 0.9;
}

.hero-image {
    flex: 1;
    text-align: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 15px;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: #6b7280;
    margin-bottom: 50px;
}

.features-section {
    padding: 80px 0;
    background: #fff;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: #f9fafb;
    border-radius: 12px;
    padding: 30px;
    transition: all 0.3s;
    border: 1px solid #e5e7eb;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border-color: #10b981;
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    color: #fff;
}

.feature-card h3 {
    font-size: 22px;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 12px;
}

.feature-card p {
    color: #6b7280;
    line-height: 1.6;
}

.download-section {
    padding: 80px 0;
    background: #f9fafb;
}

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

.version-badge {
    display: inline-block;
    background: #10b981;
    color: #fff;
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: 600;
    margin-right: 15px;
}

.release-date {
    color: #6b7280;
    font-size: 14px;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.download-card {
    background: #fff;
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
    border: 2px solid #e5e7eb;
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border-color: #10b981;
}

.os-icon {
    margin-bottom: 20px;
}

.os-icon svg {
    color: #10b981;
}

.download-card h3 {
    font-size: 24px;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 10px;
}

.os-info {
    color: #6b7280;
    font-size: 14px;
    margin-bottom: 25px;
}

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

.btn-download {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #fff;
    padding: 14px 24px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
}

.btn-download.btn-outline {
    background: transparent;
    color: #10b981;
    border: 2px solid #10b981;
}

.btn-download.btn-outline:hover {
    background: #10b981;
    color: #fff;
}

.btn-text {
    font-weight: 600;
    font-size: 16px;
}

.btn-size {
    font-size: 12px;
    opacity: 0.8;
}

.download-note {
    text-align: center;
    padding: 20px;
    background: #fff;
    border-radius: 8px;
    border-left: 4px solid #10b981;
}

.download-note a {
    color: #10b981;
    font-weight: 600;
}

.quickstart-section {
    padding: 80px 0;
    background: #fff;
}

.quickstart-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.quickstart-card {
    background: #f9fafb;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: all 0.3s;
    border: 1px solid #e5e7eb;
}

.quickstart-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
}

.quickstep-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #fff;
    border-radius: 50%;
    font-weight: 700;
    font-size: 18px;
    margin-bottom: 20px;
}

.quickstart-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 12px;
}

.quickstart-card p {
    color: #6b7280;
    line-height: 1.6;
    font-size: 15px;
}

.quickstart-card .quick-link {
    display: inline-block;
    margin-top: 15px;
    color: #10b981;
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
}

.quickstart-card .quick-link:hover {
    text-decoration: underline;
}

.why-choose-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #fff;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.stat-card {
    text-align: center;
    padding: 30px;
}

.stat-icon {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 15px;
}

.stat-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 10px;
}

.stat-card p {
    opacity: 0.9;
}

.footer {
    background: #1f2937;
    color: #fff;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 15px;
    color: #10b981;
}

.footer-section h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
}

.footer-section p {
    color: #9ca3af;
    line-height: 1.6;
    margin-bottom: 10px;
}

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

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

.footer-section ul a {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section ul a:hover {
    color: #10b981;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #374151;
    color: #9ca3af;
    font-size: 14px;
}

@media (max-width: 768px) {
    .header .container {
        flex-wrap: wrap;
    }

    .nav {
        width: 100%;
        display: none;
    }

    .nav.active {
        display: block;
    }

    .nav ul {
        flex-direction: column;
        gap: 15px;
        margin-top: 20px;
    }

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

    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

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

    .section-title {
        font-size: 28px;
    }

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .btn-large {
        padding: 12px 30px;
        font-size: 16px;
    }
}

.page-header {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #fff;
    padding: 60px 0;
    text-align: center;
}

.page-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 15px;
}

.page-subtitle {
    font-size: 18px;
    opacity: 0.9;
}

.download-main-section,
.features-main-section,
.tutorial-section,
.changelog-main-section,
.faq-section {
    padding: 60px 0;
}

.version-info-box {
    background: #fff;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.version-badge-large {
    font-size: 32px;
    font-weight: 700;
    color: #10b981;
}

.version-meta {
    display: flex;
    gap: 20px;
    margin-top: 10px;
    color: #6b7280;
    font-size: 14px;
}

.os-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.os-tab {
    padding: 12px 24px;
    background: #fff;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
}

.os-tab:hover {
    border-color: #10b981;
    color: #10b981;
}

.os-tab.active {
    background: #10b981;
    color: #fff;
    border-color: #10b981;
}

.os-download-section {
    display: none;
}

.os-download-section.active {
    display: block;
}

.os-download-section h2 {
    font-size: 28px;
    margin-bottom: 10px;
}

.os-description {
    color: #6b7280;
    margin-bottom: 30px;
}

.download-source-info {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border: 1px solid #bae6fd;
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 30px;
}

.download-source-info h3 {
    margin-bottom: 20px;
    color: #0369a1;
    font-size: 20px;
}

.source-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.source-info-item {
    background: #fff;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.source-info-item p {
    margin: 10px 0 0 0;
    color: #6b7280;
    font-size: 14px;
}

.source-badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 14px;
}

.source-badge.quark {
    background: #f59e0b;
    color: #fff;
}

.source-badge.baidu {
    background: #3b82f6;
    color: #fff;
}

.download-table {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    margin-bottom: 30px;
}

.download-row {
    display: grid;
    grid-template-columns: 2fr 1fr 2fr 2fr;
    padding: 20px;
    border-bottom: 1px solid #e5e7eb;
    align-items: center;
}

.download-row:last-child {
    border-bottom: none;
}

.download-row.header-row {
    background: #f9fafb;
    font-weight: 600;
    color: #374151;
}

.download-cell {
    padding: 0 10px;
}

.recommend-badge {
    display: inline-block;
    background: #10b981;
    color: #fff;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    margin-left: 10px;
}

.btn-download-small {
    display: inline-block;
    padding: 8px 16px;
    background: #10b981;
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: all 0.3s;
    font-size: 14px;
    white-space: nowrap;
}

.btn-download-small:hover {
    background: #059669;
    transform: translateY(-2px);
}

.download-sources {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.download-sources a {
    text-align: center;
}

.btn-quark {
    background: #f59e0b;
}

.btn-quark:hover {
    background: #d97706;
}

.btn-baidu {
    background: #3b82f6;
}

.btn-baidu:hover {
    background: #2563eb;
}

.download-tips {
    background: #f0fdf4;
    border-left: 4px solid #10b981;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 40px;
}

.download-tips h3 {
    margin-bottom: 15px;
    color: #1f2937;
}

.download-tips h3:not(:first-child) {
    margin-top: 20px;
}

.download-tips ul {
    list-style: none;
    padding-left: 0;
}

.download-tips li {
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
}

.download-tips li:before {
    content: "•";
    color: #10b981;
    position: absolute;
    left: 0;
    font-weight: bold;
}

.verification-section,
.legacy-downloads {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.verification-section h2,
.legacy-downloads h2 {
    margin-bottom: 15px;
}

.hash-info {
    background: #f9fafb;
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
}

.hash-info code {
    background: #e5e7eb;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
}

.legacy-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.feature-category {
    margin-bottom: 60px;
}

.category-title {
    font-size: 32px;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 3px solid #10b981;
}

.feature-detail {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.feature-icon-large {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon-large svg {
    color: #fff;
}

.feature-content {
    flex: 1;
}

.feature-content h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #1f2937;
}

.format-list {
    margin: 20px 0;
}

.format-group {
    margin-bottom: 15px;
}

.format-group h4 {
    color: #10b981;
    margin-bottom: 8px;
}

.feature-list {
    list-style: none;
    padding-left: 0;
}

.feature-list li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
}

.feature-list li:before {
    content: "✓";
    color: #10b981;
    position: absolute;
    left: 0;
    font-weight: bold;
}

.feature-note {
    background: #f0fdf4;
    padding: 10px 15px;
    border-radius: 6px;
    margin-top: 15px;
    font-size: 14px;
    color: #065f46;
}

.feature-grid-detailed {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.feature-item {
    background: #fff;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.feature-item h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: #1f2937;
}

.comparison-section {
    margin-top: 60px;
}

.comparison-table {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
    padding: 15px;
    text-align: center;
    border-bottom: 1px solid #e5e7eb;
}

.comparison-table th {
    background: #f9fafb;
    font-weight: 600;
}

.comparison-table .check {
    color: #10b981;
    font-weight: bold;
}

.comparison-table .cross {
    color: #ef4444;
}

.comparison-table .partial {
    color: #f59e0b;
}

.tutorial-nav {
    background: #fff;
    padding: 25px;
    border-radius: 12px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.tutorial-nav h3 {
    margin-bottom: 15px;
    color: #1f2937;
}

.tutorial-nav ul {
    list-style: none;
    padding: 0;
}

.tutorial-nav li {
    padding: 10px 0;
    border-bottom: 1px solid #e5e7eb;
}

.tutorial-nav li:last-child {
    border-bottom: none;
}

.tutorial-nav a {
    color: #6b7280;
    text-decoration: none;
    transition: color 0.3s;
}

.tutorial-nav a:hover {
    color: #10b981;
}

.tutorial-article {
    background: #fff;
    padding: 40px;
    border-radius: 12px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.tutorial-article h2 {
    font-size: 28px;
    margin-bottom: 25px;
    color: #1f2937;
    padding-bottom: 15px;
    border-bottom: 2px solid #10b981;
}

.tutorial-step {
    margin-bottom: 30px;
}

.tutorial-step h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #374151;
}

.tutorial-step ol,
.tutorial-step ul {
    padding-left: 25px;
}

.tutorial-step li {
    margin-bottom: 10px;
    line-height: 1.8;
}

.warning-box {
    background: #fef3cd;
    border-left: 4px solid #f59e0b;
    padding: 15px;
    border-radius: 6px;
    margin-top: 20px;
}

.shortcuts-table {
    background: #f9fafb;
    border-radius: 8px;
    overflow: hidden;
}

.shortcuts-table table {
    width: 100%;
    border-collapse: collapse;
}

.shortcuts-table th,
.shortcuts-table td {
    padding: 12px 20px;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

.shortcuts-table th {
    background: #fff;
    font-weight: 600;
}

kbd {
    background: #fff;
    border: 1px solid #d1d5db;
    border-radius: 4px;
    padding: 2px 8px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.tip-card {
    background: #f9fafb;
    padding: 25px;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
}

.tip-card h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #1f2937;
}

.tip-card ul {
    list-style: none;
    padding: 0;
}

.tip-card li {
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
}

.tip-card li:before {
    content: "•";
    color: #10b981;
    position: absolute;
    left: 0;
    font-weight: bold;
}

.changelog-list {
    margin-bottom: 40px;
}

.changelog-item {
    background: #fff;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.changelog-item.latest {
    border: 2px solid #10b981;
}

.changelog-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid #e5e7eb;
}

.version-info h2 {
    font-size: 24px;
    color: #1f2937;
    margin-bottom: 5px;
}

.release-date {
    color: #6b7280;
    font-size: 14px;
}

.change-category {
    margin-bottom: 25px;
}

.change-category h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #374151;
}

.change-category ul {
    list-style: none;
    padding: 0;
}

.change-category li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
}

.change-category li:before {
    content: "•";
    color: #10b981;
    position: absolute;
    left: 0;
    font-weight: bold;
}

.changelog-footer {
    text-align: center;
    padding: 30px;
    background: #f9fafb;
    border-radius: 12px;
}

.changelog-links {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 20px;
}

.faq-search {
    margin-bottom: 30px;
}

.search-input {
    width: 100%;
    max-width: 500px;
    padding: 15px 20px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.search-input:focus {
    outline: none;
    border-color: #10b981;
}

.faq-categories {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.faq-category-btn {
    padding: 10px 20px;
    background: #fff;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
}

.faq-category-btn:hover {
    border-color: #10b981;
    color: #10b981;
}

.faq-category-btn.active {
    background: #10b981;
    color: #fff;
    border-color: #10b981;
}

.faq-list {
    margin-bottom: 40px;
}

.faq-item {
    background: #fff;
    border-radius: 12px;
    margin-bottom: 15px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.faq-question {
    padding: 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s;
}

.faq-question:hover {
    background: #f9fafb;
}

.faq-question h3 {
    font-size: 18px;
    color: #1f2937;
    margin: 0;
}

.faq-toggle {
    font-size: 24px;
    color: #10b981;
    font-weight: bold;
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s;
}

.faq-item.active .faq-answer {
    padding: 0 20px 20px;
    max-height: 1000px;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-contact {
    text-align: center;
    padding: 40px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.faq-contact h2 {
    margin-bottom: 15px;
}

.contact-options {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 20px;
}

@media (max-width: 768px) {
    .version-info-box {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }

    .download-row {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .download-row.header-row {
        display: none;
    }

    .feature-detail {
        flex-direction: column;
    }

    .feature-icon-large {
        width: 60px;
        height: 60px;
    }

    .changelog-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .faq-categories {
        justify-content: center;
    }
}