* {
    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: #f0fdfa;
}

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

/* Header */
.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #06b6d4 0%, #0e7490 100%);
    border-radius: 10px;
    color: #fff;
    font-weight: 800;
    font-size: 16px;
    box-shadow: 0 4px 10px rgba(6, 182, 212, 0.35);
}

.logo-text h1 {
    font-size: 22px;
    color: #0e7490;
    font-weight: 700;
    line-height: 1.1;
}

.logo-text .tagline {
    font-size: 12px;
    color: #6b7280;
}

.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: #0891b2;
}

/* Hero */
.hero {
    background: linear-gradient(135deg, #06b6d4 0%, #0e7490 100%);
    color: #fff;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 60px;
    position: relative;
    z-index: 1;
}

.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: 0.95;
}

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

.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: #0e7490;
}

.btn-primary:hover {
    background: #ecfeff;
    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;
    flex-wrap: wrap;
}

.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;
}

/* Snipaste app demo */
.snipaste-demo {
    background: #0f172a;
    border-radius: 12px;
    padding: 18px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.snipaste-titlebar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-bottom: 12px;
    border-bottom: 1px solid #1e293b;
    margin-bottom: 12px;
}

.app-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #475569;
}

.app-dot.red { background: #ef4444; }
.app-dot.yellow { background: #f59e0b; }
.app-dot.green { background: #10b981; }

.snipaste-name {
    margin-left: auto;
    color: #22d3ee;
    font-size: 13px;
    font-weight: 500;
}

.snipaste-body {
    background: #1e293b;
    border-radius: 6px;
    padding: 16px;
    min-height: 280px;
    position: relative;
}

.snipaste-toolbar {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.tool-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: #334155;
    border-radius: 6px;
    color: #e2e8f0;
    font-size: 14px;
}

.tool-btn.active {
    background: #06b6d4;
    color: #fff;
}

.snipaste-canvas {
    background: #0f172a;
    border: 2px dashed #22d3ee;
    border-radius: 6px;
    padding: 20px;
    color: #cbd5e1;
    font-size: 13px;
    position: relative;
    min-height: 180px;
}

.snipaste-canvas .sel-info {
    position: absolute;
    top: 8px;
    left: 8px;
    background: #06b6d4;
    color: #fff;
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
}

.snipaste-canvas .color-pick {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: #1e293b;
    border: 1px solid #22d3ee;
    padding: 4px 10px;
    border-radius: 4px;
    font-family: 'Consolas', monospace;
    font-size: 11px;
    color: #22d3ee;
}

.snipaste-canvas .pin-window {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #06b6d4;
    color: #fff;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.4);
}

.kbd {
    display: inline-block;
    padding: 2px 8px;
    background: #334155;
    border: 1px solid #475569;
    border-radius: 4px;
    color: #22d3ee;
    font-family: 'Consolas', monospace;
    font-size: 12px;
    font-weight: 600;
    margin: 0 2px;
}

/* Sections */
.features-preview {
    padding: 80px 0;
    background: #fff;
}

.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 20px;
    color: #333;
}

.section-subtitle {
    text-align: center;
    color: #6b7280;
    max-width: 700px;
    margin: 0 auto 50px;
}

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

.feature-card {
    background: #ecfeff;
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid #cffafe;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(6, 182, 212, 0.12);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #333;
}

.feature-card p {
    color: #666;
    font-size: 14px;
}

.cta-section {
    background: linear-gradient(135deg, #06b6d4 0%, #0e7490 100%);
    color: #fff;
    padding: 80px 0;
    text-align: center;
}

.cta-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 15px;
}

.cta-subtitle {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.95;
}

/* Footer */
.footer {
    background: #0f172a;
    color: #fff;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 20px;
}

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

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

.footer-section a {
    color: #22d3ee;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: #fff;
}

.footer-section p {
    color: #9ca3af;
    font-size: 14px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #1e293b;
    color: #9ca3af;
    font-size: 14px;
}

/* Disclaimer */
.disclaimer {
    background: #fef3c7;
    border: 1px solid #fcd34d;
    border-radius: 8px;
    padding: 20px;
    margin: 30px 0;
    color: #92400e;
    line-height: 1.8;
}

.disclaimer h4 {
    color: #78350f;
    margin-bottom: 10px;
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.disclaimer p {
    font-size: 14px;
    margin-bottom: 5px;
}

.disclaimer strong {
    color: #7c2d12;
}

/* Sections */
.download-section {
    padding: 80px 0;
    background: #fff;
}

.features-section {
    padding: 80px 0;
    background: #f8fafc;
}

.features-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.feature-item {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(6, 182, 212, 0.12);
}

.feature-item h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: #333;
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-item p {
    color: #666;
    font-size: 15px;
    line-height: 1.8;
}

/* FAQ */
.faq-section {
    padding: 80px 0;
    background: #fff;
}

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

.faq-item {
    margin-bottom: 20px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    overflow: hidden;
}

.faq-question {
    padding: 20px;
    background: #f8fafc;
    cursor: pointer;
    font-weight: 600;
    font-size: 18px;
    color: #333;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::after {
    content: '+';
    font-size: 24px;
    color: #0891b2;
    transition: transform 0.3s;
}

.faq-answer {
    padding: 20px;
    background: #fff;
    color: #666;
    line-height: 1.8;
    display: none;
}

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

.faq-item.active .faq-question::after {
    content: '-';
}

/* About */
.about-section {
    padding: 80px 0;
    background: #fff;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content h2 {
    font-size: 30px;
    margin-bottom: 20px;
    color: #333;
    margin-top: 40px;
}

.about-content h2:first-child {
    margin-top: 0;
}

.about-content p {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 15px;
}

/* Quickstart */
.quickstart-section {
    background: #f0fdfa;
    padding: 80px 0;
}

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

.quickstart-card {
    background: #fff;
    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(6, 182, 212, 0.12);
}

.quickstep-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #06b6d4 0%, #0e7490 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;
}

/* Tech */
.tech-section {
    padding: 80px 0;
    background: #fff;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.tech-card {
    background: #f0fdfa;
    border-radius: 12px;
    padding: 30px;
    border: 1px solid #cffafe;
    position: relative;
}

.tech-number {
    position: absolute;
    top: 20px;
    right: 25px;
    font-size: 48px;
    font-weight: 800;
    color: #a5f3fc;
    line-height: 1;
}

.tech-card h3 {
    font-size: 20px;
    color: #333;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.tech-card p {
    color: #666;
    font-size: 14px;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

/* Scenario */
.scenario-card {
    background: #fff;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
    height: 100%;
}

.scenario-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(6, 182, 212, 0.12);
}

.scenario-card h3 {
    font-size: 20px;
    color: #333;
    margin-bottom: 12px;
}

.scenario-card p {
    color: #666;
    font-size: 15px;
    line-height: 1.7;
}

.scenario-badge {
    display: inline-block;
    margin-top: 15px;
    padding: 4px 12px;
    background: #cffafe;
    color: #155e75;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

/* Testimonial */
.testimonial {
    background: #fff;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    border-left: 4px solid #06b6d4;
}

.testimonial-quote {
    font-size: 16px;
    color: #374151;
    line-height: 1.7;
    font-style: italic;
    margin-bottom: 15px;
}

.testimonial-author {
    color: #6b7280;
    font-size: 14px;
    font-weight: 600;
}

/* Download table */
.download-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.download-table th,
.download-table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

.download-table th {
    background: #ecfeff;
    font-weight: 600;
    color: #155e75;
    text-transform: uppercase;
    font-size: 14px;
}

.download-table tr:hover {
    background: #f0fdfa;
}

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

.table-wrapper {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.download-link {
    display: inline-block;
    padding: 10px 24px;
    background: #0891b2;
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
}

.download-link:hover {
    background: #0e7490;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(8, 145, 178, 0.3);
}

.download-link.disabled {
    background: #d1d5db;
    cursor: not-allowed;
    pointer-events: none;
}

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

.platform-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    margin-right: 8px;
}

.platform-badge.windows { background: #dbeafe; color: #1e40af; }
.platform-badge.mac { background: #fef3c7; color: #92400e; }
.platform-badge.linux { background: #dcfce7; color: #166534; }
.platform-badge.ios { background: #e0e7ff; color: #4338ca; }
.platform-badge.android { background: #fce7f3; color: #9f1239; }
.platform-badge.arm64 { background: #f0fdfa; color: #0891b2; }
.platform-badge.install { background: #cffafe; color: #155e75; }
.platform-badge.portable { background: #fce7f3; color: #9f1239; }

.category-title {
    font-size: 24px;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 3px solid #06b6d4;
}

.info-box {
    background: #ecfeff;
    border-left: 4px solid #06b6d4;
    padding: 20px;
    border-radius: 8px;
    margin: 40px 0;
}

.info-box h4 {
    color: #1f2937;
    margin-bottom: 10px;
    font-size: 18px;
}

.info-box p {
    color: #6b7280;
    line-height: 1.8;
    margin: 0;
}

.version-section {
    margin-bottom: 60px;
}

.version-section-title {
    font-size: 28px;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 15px;
}

.version-section-date {
    color: #6b7280;
    margin-bottom: 30px;
}

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

.version-number {
    font-size: 48px;
    font-weight: 700;
    color: #0891b2;
    margin-bottom: 10px;
}

.version-date {
    color: #6b7280;
    font-size: 16px;
}

.password-note {
    color: #dc2626;
    font-size: 12px;
    margin-top: 5px;
}

.coming-soon {
    color: #9ca3af;
    font-size: 14px;
    font-style: italic;
}

/* Changelog section */
.changelog-section {
    padding: 80px 0;
    background: #fff;
}

.changelog-container {
    max-width: 900px;
    margin: 0 auto;
}

.changelog-item {
    background: #f8fafc;
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    border-left: 4px solid #06b6d4;
}

.changelog-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    flex-wrap: wrap;
    gap: 10px;
}

.changelog-version {
    font-size: 20px;
    font-weight: 700;
    color: #0e7490;
}

.changelog-date {
    color: #6b7280;
    font-size: 14px;
    background: #cffafe;
    padding: 4px 12px;
    border-radius: 20px;
}

.changelog-platform {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    margin-left: 8px;
    background: #a5f3fc;
    color: #155e75;
}

.changelog-content {
    color: #4b5563;
    line-height: 1.8;
}

.changelog-content h4 {
    color: #1f2937;
    margin: 15px 0 8px;
    font-size: 16px;
    font-weight: 700;
}

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

.changelog-content li {
    padding: 6px 0;
    padding-left: 20px;
    position: relative;
    font-size: 14px;
}

.changelog-content li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: #06b6d4;
    font-weight: bold;
}

.changelog-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    margin-left: 6px;
    vertical-align: middle;
}

.changelog-badge.new { background: #dcfce7; color: #166534; }
.changelog-badge.fix { background: #fef3c7; color: #92400e; }
.changelog-badge.improve { background: #dbeafe; color: #1e40af; }
.changelog-badge.pro { background: #fce7f3; color: #9f1239; }

/* Mobile nav */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 26px;
    color: #0e7490;
    cursor: pointer;
    padding: 5px 10px;
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 15px;
    }

    .menu-toggle {
        display: block;
    }

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

    .nav.open {
        display: block;
    }

    .nav ul {
        flex-direction: column;
        gap: 10px;
        width: 100%;
    }

    .nav li {
        width: 100%;
    }

    .nav a {
        display: block;
        padding: 10px 0;
        border-bottom: 1px solid #f3f4f6;
    }

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

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

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

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

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

    .version-number {
        font-size: 36px;
    }

    .category-title {
        font-size: 20px;
    }

    /* 移动端表格优化 */
    .table-wrapper {
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
        border-radius: 8px;
        border: 1px solid #e5e7eb;
    }

    .table-wrapper::-webkit-scrollbar {
        height: 6px;
    }

    .table-wrapper::-webkit-scrollbar-track {
        background: #f1f5f9;
    }

    .table-wrapper::-webkit-scrollbar-thumb {
        background: #06b6d4;
        border-radius: 3px;
    }

    .download-table {
        min-width: 600px;
    }

    .download-table th,
    .download-table td {
        padding: 12px 10px;
        font-size: 13px;
        white-space: nowrap;
    }

    .download-link {
        padding: 8px 12px;
        font-size: 12px;
        display: block;
        text-align: center;
        margin-bottom: 4px;
    }

    .password-note {
        display: block;
        font-size: 11px;
        margin-top: 2px;
    }

    .platform-badge {
        padding: 3px 6px;
        font-size: 11px;
        margin-right: 4px;
        margin-bottom: 2px;
    }

    .file-size {
        font-size: 12px;
    }

    .version-section-title {
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .version-number {
        font-size: 28px;
    }
    .category-title {
        font-size: 18px;
    }
    .version-section-title {
        font-size: 20px;
    }

    .download-table {
        min-width: 500px;
    }

    .download-table th,
    .download-table td {
        padding: 8px 6px;
        font-size: 12px;
    }

    .download-link {
        padding: 6px 8px;
        font-size: 11px;
    }

    .password-note {
        font-size: 10px;
    }

    .platform-badge {
        padding: 2px 4px;
        font-size: 10px;
    }

    .file-size {
        font-size: 11px;
    }

    .disclaimer h4 {
        font-size: 14px;
    }

    .disclaimer p {
        font-size: 13px;
    }
}

/* Tutorial / 基础操作 */
.tutorial-section {
    padding: 80px 0;
    background: #fff;
}

.tutorial-container {
    max-width: 900px;
    margin: 0 auto;
}

.tutorial-group {
    background: #f8fafc;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    border-left: 4px solid #06b6d4;
}

.tutorial-group-title {
    font-size: 26px;
    font-weight: 700;
    color: #0e7490;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid #cffafe;
    display: flex;
    align-items: center;
    gap: 10px;
}

.tutorial-sub {
    font-size: 18px;
    font-weight: 600;
    color: #1f2937;
    margin-top: 24px;
    margin-bottom: 12px;
}

.tutorial-sub:first-of-type {
    margin-top: 0;
}

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

.tutorial-list li {
    padding: 8px 0 8px 24px;
    position: relative;
    color: #4b5563;
    font-size: 15px;
    line-height: 1.8;
}

.tutorial-list li::before {
    content: "▸";
    position: absolute;
    left: 4px;
    color: #06b6d4;
    font-weight: bold;
}

.tutorial-list li ul {
    list-style: none;
    padding-left: 20px;
    margin-top: 6px;
}

.tutorial-list li ul li {
    padding-left: 18px;
    font-size: 14px;
    color: #6b7280;
}

.tutorial-list li ul li::before {
    content: "·";
    color: #94a3b8;
}

.tutorial-note {
    background: #ecfeff;
    border-left: 4px solid #06b6d4;
    padding: 16px 20px;
    border-radius: 8px;
    margin: 20px 0;
    color: #155e75;
    font-size: 14px;
    line-height: 1.8;
}

.tutorial-note strong {
    color: #0e7490;
}

.tutorial-hero {
    background: linear-gradient(135deg, #06b6d4 0%, #0e7490 100%);
    color: #fff;
    padding: 60px 0;
    text-align: center;
}

.tutorial-hero h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 15px;
}

.tutorial-hero p {
    font-size: 18px;
    opacity: 0.95;
    max-width: 700px;
    margin: 0 auto;
}

.toc-box {
    background: #f0fdfa;
    border: 1px solid #cffafe;
    border-radius: 10px;
    padding: 24px 30px;
    margin-bottom: 40px;
}

.toc-box h3 {
    font-size: 18px;
    color: #0e7490;
    margin-bottom: 12px;
}

.toc-box ol {
    padding-left: 22px;
    color: #4b5563;
    line-height: 2;
}

.toc-box a {
    color: #0891b2;
    text-decoration: none;
    font-weight: 500;
}

.toc-box a:hover {
    text-decoration: underline;
}

.tutorial-kbd {
    display: inline-block;
    padding: 2px 8px;
    background: #fff;
    border: 1px solid #cffafe;
    border-radius: 4px;
    color: #0e7490;
    font-family: 'Consolas', monospace;
    font-size: 13px;
    font-weight: 600;
    margin: 0 2px;
    box-shadow: 0 1px 2px rgba(6, 182, 212, 0.1);
}