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

:root {
    --primary: #6C5CE7;
    --primary-dark: #5A4BD1;
    --primary-light: #A29BFE;
    --secondary: #00CEC9;
    --accent: #FD79A8;
    --dark: #0A0A1A;
    --dark-light: #1A1A2E;
    --dark-card: #16213E;
    --text: #E8E8F0;
    --text-muted: #A0A0C0;
    --border: rgba(108, 92, 231, 0.2);
    --gradient-primary: linear-gradient(135deg, #6C5CE7, #00CEC9);
    --gradient-hero: linear-gradient(135deg, #0A0A1A 0%, #1A1A2E 50%, #16213E 100%);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    background-color: var(--dark);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

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

code {
    background: rgba(108, 92, 231, 0.15);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: "Fira Code", "SF Mono", Consolas, monospace;
    font-size: 0.9em;
    color: var(--secondary);
}

/* === Navigation === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 26, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
    transition: var(--transition);
}

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

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text) !important;
    display: flex;
    align-items: center;
    gap: 6px;
}

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

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

.cn-badge {
    font-size: 0.65rem;
    background: var(--gradient-primary);
    padding: 2px 6px;
    border-radius: 4px;
    color: white;
    font-weight: 600;
    vertical-align: super;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 24px;
    align-items: center;
}

.nav-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--text);
}

.lang-switch {
    background: var(--border);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: var(--transition);
}

/* === Hero === */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    background: var(--gradient-hero);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(108, 92, 231, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(0, 206, 201, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(253, 121, 168, 0.08) 0%, transparent 50%);
    animation: heroGlow 8s ease-in-out infinite alternate;
}

@keyframes heroGlow {
    0% { opacity: 0.7; }
    100% { opacity: 1; }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-badge {
    display: inline-block;
    background: rgba(108, 92, 231, 0.2);
    border: 1px solid var(--primary);
    color: var(--primary-light);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease;
}

.hero h1 {
    font-size: 4.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
    margin-bottom: 12px;
    animation: fadeInUp 0.6s ease 0.1s both;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-muted);
    margin-bottom: 20px;
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text);
    line-height: 1.8;
    margin-bottom: 40px;
    animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 40px;
    animation: fadeInUp 0.6s ease 0.4s both;
}

.stat {
    text-align: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}

.stat:hover {
    border-color: var(--primary);
    background: rgba(108, 92, 231, 0.08);
    transform: translateY(-2px);
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    animation: fadeInUp 0.6s ease 0.5s both;
}

.hero-contact {
    margin-top: 24px;
    padding: 12px 20px;
    background: rgba(253, 121, 168, 0.1);
    border: 1px solid rgba(253, 121, 168, 0.3);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    color: var(--text-muted);
    animation: fadeInUp 0.6s ease 0.6s both;
}

.hero-contact a {
    color: var(--accent);
    font-weight: 600;
}

.hero-contact a:hover {
    color: #fff;
}

.footer-contact {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
    font-size: 0.85rem;
}

.footer-contact a {
    color: var(--accent);
    font-weight: 600;
}

/* === Buttons === */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(108, 92, 231, 0.4);
    color: white;
}

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

.btn-secondary:hover {
    border-color: var(--primary);
    background: rgba(108, 92, 231, 0.1);
    color: var(--text);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.1rem;
}

/* === Sections === */
.section {
    padding: 100px 0;
}

.section-alt {
    background: var(--dark-light);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 16px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    text-align: center;
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 60px;
}

/* === About Section === */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 40px;
    align-items: start;
}

.about-text p {
    margin-bottom: 16px;
    font-size: 1.05rem;
}

.about-text h3 {
    font-size: 1.3rem;
    color: var(--secondary);
    margin: 24px 0 12px;
}

.about-card {
    background: var(--dark-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px;
    position: sticky;
    top: 100px;
}

.about-card h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--primary-light);
}

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

.info-table tr {
    border-bottom: 1px solid var(--border);
}

.info-table td {
    padding: 10px 0;
    font-size: 0.9rem;
}

.info-table td:first-child {
    color: var(--text-muted);
    width: 40%;
    font-weight: 500;
}

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

/* === Features === */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--dark-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: var(--transition);
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--text);
}

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

/* === Benchmarks === */
.benchmark-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.benchmark-card {
    background: var(--dark-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: var(--transition);
}

.benchmark-card:hover {
    border-color: var(--primary);
}

.benchmark-card h3 {
    font-size: 1.15rem;
    margin-bottom: 16px;
    color: var(--text);
}

.benchmark-detail p {
    color: var(--text-muted);
    font-size: 0.92rem;
    margin-bottom: 8px;
}

.benchmark-rating {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.stars {
    color: #FFD700;
    font-size: 1.1rem;
    letter-spacing: 2px;
}

.benchmark-rating span:last-child {
    color: var(--secondary);
    font-size: 0.85rem;
    font-weight: 600;
}

/* === API Section === */
.api-content {
    max-width: 800px;
    margin: 0 auto;
}

.api-step {
    margin-bottom: 40px;
}

.api-step h3 {
    font-size: 1.2rem;
    color: var(--text);
    margin-bottom: 12px;
}

.api-step p {
    color: var(--text-muted);
    margin-bottom: 16px;
}

.code-block {
    background: #0D1117;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    background: rgba(108, 92, 231, 0.1);
    border-bottom: 1px solid var(--border);
}

.code-header span {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
}

.copy-btn {
    background: rgba(108, 92, 231, 0.2);
    border: 1px solid var(--primary);
    color: var(--primary-light);
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

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

.code-block pre {
    padding: 20px;
    overflow-x: auto;
    font-size: 0.88rem;
    line-height: 1.6;
}

.code-block code {
    background: none;
    padding: 0;
    color: #C9D1D9;
    font-size: 0.88rem;
}

.api-tips {
    background: var(--dark-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    margin-top: 40px;
}

.api-tips h3 {
    color: var(--secondary);
    margin-bottom: 16px;
}

.api-tips ul {
    list-style: none;
}

.api-tips li {
    padding: 8px 0;
    color: var(--text-muted);
    font-size: 0.95rem;
    border-bottom: 1px solid var(--border);
}

.api-tips li:last-child {
    border-bottom: none;
}

/* === Origin Section === */
.origin-content {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 40px;
    align-items: start;
}

.theory-card {
    background: var(--dark-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    margin-bottom: 24px;
    position: relative;
}

.theory-primary {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(108, 92, 231, 0.08), rgba(0, 206, 201, 0.05));
}

.theory-badge {
    position: absolute;
    top: -12px;
    left: 20px;
    background: var(--gradient-primary);
    color: white;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.theory-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--text);
}

.theory-card p {
    color: var(--text-muted);
    margin-bottom: 16px;
    font-size: 0.95rem;
}

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

.evidence-list li {
    padding: 10px 0;
    padding-left: 20px;
    position: relative;
    color: var(--text-muted);
    font-size: 0.92rem;
    border-bottom: 1px solid rgba(108, 92, 231, 0.1);
}

.evidence-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: bold;
}

.other-theories {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.theory-item {
    padding: 12px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--border);
}

.theory-item h4 {
    font-size: 0.95rem;
    color: var(--text);
    margin-bottom: 4px;
}

.theory-item p {
    font-size: 0.85rem;
    margin-bottom: 0;
}

.theory-card ul:not(.evidence-list) {
    padding-left: 20px;
    color: var(--text-muted);
}

.theory-card ul:not(.evidence-list) li {
    padding: 6px 0;
    font-size: 0.92rem;
}

/* Timeline */
.origin-timeline {
    position: sticky;
    top: 100px;
}

.origin-timeline h3 {
    font-size: 1.2rem;
    color: var(--primary-light);
    margin-bottom: 24px;
}

.timeline {
    position: relative;
    padding-left: 24px;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-primary);
}

.timeline-item {
    position: relative;
    padding-bottom: 28px;
    padding-left: 20px;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: -29px;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary);
    border: 2px solid var(--dark);
}

.timeline-date {
    font-size: 0.8rem;
    color: var(--secondary);
    font-weight: 600;
    margin-bottom: 4px;
}

.timeline-text {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* === FAQ === */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--dark-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
    transition: var(--transition);
}

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

.faq-question {
    padding: 20px 24px;
    font-size: 1.05rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--primary-light);
}

.faq-toggle {
    font-size: 1.5rem;
    color: var(--primary);
    transition: var(--transition);
    flex-shrink: 0;
    margin-left: 16px;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer div {
    padding: 0 24px 20px;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* === CTA === */
.cta-section {
    background: linear-gradient(135deg, rgba(108, 92, 231, 0.15), rgba(0, 206, 201, 0.1));
    text-align: center;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.cta-section h2 {
    font-size: 2.2rem;
    margin-bottom: 16px;
}

.cta-section p {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 32px;
}

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

/* === Footer === */
.footer {
    background: var(--dark-light);
    padding: 60px 0 30px;
    border-top: 1px solid var(--border);
}

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

.footer-about h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--text);
}

.footer-about p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-links h4 {
    font-size: 0.95rem;
    margin-bottom: 16px;
    color: var(--text);
}

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

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

.footer-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.8rem;
}

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

/* === Responsive === */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
    }

    .about-card {
        position: static;
    }

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

    .origin-timeline {
        position: static;
    }

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

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

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(10, 10, 26, 0.98);
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
    }

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

    .hero h1 {
        font-size: 2.8rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

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

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

    .section-title {
        font-size: 2rem;
    }

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

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

    .cta-actions {
        flex-direction: column;
        align-items: center;
    }

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

    .section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2.2rem;
    }

    .hero-stats {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .stat {
        padding: 14px;
    }

    .stat-value {
        font-size: 1.5rem;
    }
}

/* === Blog list (for /blog/) === */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
}

.blog-card {
    background: var(--dark-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: var(--transition);
}

.blog-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
}

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

.blog-card h3 a {
    color: var(--text);
}

.blog-card h3 a:hover {
    color: var(--primary-light);
}

.blog-meta {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-bottom: 12px;
}

.blog-excerpt {
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.7;
}

/* === Article page === */
.article-content {
    max-width: 800px;
    margin: 0 auto;
}

.article-content h1 {
    font-size: 2.2rem;
    margin-bottom: 16px;
}

.article-content h2 {
    font-size: 1.6rem;
    color: var(--primary-light);
    margin: 40px 0 16px;
}

.article-content h3 {
    font-size: 1.3rem;
    color: var(--secondary);
    margin: 32px 0 12px;
}

.article-content p {
    margin-bottom: 16px;
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text);
}

.article-content ul, .article-content ol {
    margin-bottom: 16px;
    padding-left: 24px;
}

.article-content li {
    margin-bottom: 8px;
    color: var(--text-muted);
    line-height: 1.7;
}

.article-meta {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.breadcrumb {
    margin-bottom: 24px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

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