:root {
    --bg: #07070b;
    --bg-elevated: #111118;
    --bg-card: #16161f;
    --border: rgba(255,255,255,.08);
    --text: #f3f4f6;
    --muted: #9ca3af;
    --primary: #e50914;
    --primary-dim: #b80610;
    --primary-soft: rgba(229,9,20,.12);
    --radius: 14px;
    --wrap: 1120px;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

a { color: inherit; text-decoration: none; }

.wrap {
    width: min(var(--wrap), calc(100% - 2rem));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(7,7,11,.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    min-height: 68px;
}

.brand {
    display: flex;
    align-items: center;
    gap: .6rem;
    flex-shrink: 0;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 52px;
    padding: .35rem .55rem;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    font-size: .85rem;
    letter-spacing: .06em;
    border-radius: 8px;
}

.brand-text {
    font-weight: 600;
    font-size: .95rem;
    color: #fff;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: .25rem;
    flex: 1;
    justify-content: center;
}

.nav-link {
    padding: .55rem .9rem;
    border-radius: 8px;
    color: var(--muted);
    font-size: .92rem;
    transition: .2s;
}

.nav-link:hover,
.nav-link.active {
    color: #fff;
    background: rgba(255,255,255,.06);
}

.nav-link.active { color: var(--primary); }

.header-cta { margin-left: auto; }

.nav-toggle {
    display: none;
    margin-left: auto;
    padding: .45rem .8rem;
    border: 1px solid var(--border);
    background: transparent;
    color: #fff;
    border-radius: 8px;
    cursor: pointer;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: .75rem 1.35rem;
    border-radius: 10px;
    font-size: .92rem;
    font-weight: 600;
    border: 1px solid transparent;
    transition: .2s;
    cursor: pointer;
}

.btn-sm { padding: .55rem 1rem; font-size: .85rem; }
.btn-lg { padding: .9rem 1.6rem; font-size: 1rem; }
.btn-block { width: 100%; }

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

.btn-primary:hover { background: var(--primary-dim); }

.btn-ghost {
    border-color: var(--border);
    color: #fff;
    background: rgba(255,255,255,.03);
}

.btn-ghost:hover { border-color: rgba(255,255,255,.2); }

.hero {
    padding: 5rem 0 4rem;
    background:
        radial-gradient(circle at 20% 20%, rgba(229,9,20,.18), transparent 40%),
        radial-gradient(circle at 80% 0%, rgba(59,130,246,.08), transparent 30%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: 3rem;
    align-items: center;
}

.eyebrow {
    color: var(--primary);
    font-size: .82rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.hero h1 {
    font-size: clamp(2rem, 4vw, 3.2rem);
    line-height: 1.15;
    margin-bottom: 1rem;
}

.hero h1 span { color: var(--primary); }

.lead {
    color: var(--muted);
    font-size: 1.05rem;
    max-width: 38rem;
}

.hero-actions {
    display: flex;
    gap: .8rem;
    flex-wrap: wrap;
    margin: 1.8rem 0;
}

.hero-stats {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.hero-stats li strong {
    display: block;
    font-size: 1rem;
}

.hero-stats li span {
    color: var(--muted);
    font-size: .82rem;
}

.hero-panel { position: relative; }

.panel-card {
    background: linear-gradient(180deg, #1a1a24 0%, #12121a 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 24px 60px rgba(0,0,0,.35);
}

.panel-head {
    padding: .9rem 1.2rem;
    border-bottom: 1px solid var(--border);
    font-size: .85rem;
    color: var(--muted);
}

.panel-body { padding: 1.2rem; }

.mock-stat-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: .8rem;
    margin-bottom: 1rem;
}

.mock-stat {
    background: rgba(255,255,255,.03);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: .8rem;
}

.mock-stat span {
    display: block;
    font-size: .72rem;
    color: var(--muted);
}

.mock-stat em {
    font-style: normal;
    font-size: 1.2rem;
    color: var(--primary);
    font-weight: 700;
}

.mock-list { display: grid; gap: .55rem; }

.mock-item {
    display: flex;
    align-items: center;
    gap: .6rem;
    font-size: .88rem;
    color: #d1d5db;
}

.mock-item .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    flex-shrink: 0;
}

.section { padding: 4.5rem 0; }

.section-dark {
    background: var(--bg-elevated);
    border-block: 1px solid var(--border);
}

.section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 3rem;
}

.section-head h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    line-height: 1.25;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: .2s;
}

.feature-card:hover {
    border-color: rgba(229,9,20,.35);
    transform: translateY(-2px);
}

.feature-card h3 {
    font-size: 1.05rem;
    margin-bottom: .6rem;
}

.feature-card p {
    color: var(--muted);
    font-size: .92rem;
}

.split-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    align-items: center;
}

.check-list {
    list-style: none;
    margin-top: 1.5rem;
}

.check-list li {
    position: relative;
    padding-left: 1.4rem;
    margin-bottom: .7rem;
    color: #d1d5db;
}

.check-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .55rem;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
}

.code-block {
    background: #0d0d12;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.code-title {
    padding: .75rem 1rem;
    border-bottom: 1px solid var(--border);
    font-size: .82rem;
    color: var(--muted);
}

.code-block pre {
    padding: 1.2rem;
    font-size: .88rem;
    line-height: 1.7;
    color: #cbd5e1;
    white-space: pre-wrap;
}

.cta-section { padding-bottom: 5rem; }

.cta-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    padding: 2rem 2.2rem;
    border-radius: calc(var(--radius) + 4px);
    background: linear-gradient(135deg, rgba(229,9,20,.18), rgba(229,9,20,.05));
    border: 1px solid rgba(229,9,20,.25);
}

.cta-box h2 { font-size: 1.6rem; margin-bottom: .4rem; }
.cta-box p { color: var(--muted); }
.cta-box strong { color: #fff; }

.page-hero {
    padding: 4rem 0 2rem;
    border-bottom: 1px solid var(--border);
}

.page-hero h1 {
    font-size: clamp(2rem, 4vw, 2.8rem);
    margin-bottom: .8rem;
}

.feature-detail-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.2rem;
}

.detail-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.6rem;
}

.detail-tag {
    display: inline-block;
    padding: .2rem .55rem;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: .72rem;
    font-weight: 700;
    margin-bottom: .8rem;
}

.detail-card h2 {
    font-size: 1.25rem;
    margin-bottom: .8rem;
}

.detail-card ul {
    padding-left: 1.1rem;
    color: var(--muted);
}

.detail-card li { margin-bottom: .45rem; }

.cta-inline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.pricing-grid {
    display: grid;
    grid-template-columns: 1.2fr .9fr .9fr;
    gap: 1.2rem;
    align-items: start;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.6rem;
    position: relative;
}

.pricing-featured {
    border-color: rgba(229,9,20,.4);
    box-shadow: 0 0 0 1px rgba(229,9,20,.15);
}

.pricing-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--primary);
    color: #fff;
    font-size: .72rem;
    font-weight: 700;
    padding: .25rem .55rem;
    border-radius: 999px;
}

.pricing-card h2 { font-size: 1.3rem; margin-bottom: .6rem; }

.pricing-price {
    display: flex;
    align-items: baseline;
    gap: .35rem;
    margin: .2rem 0 1rem;
}

.pricing-price .amount {
    font-size: 2.75rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.pricing-price .unit {
    color: var(--muted);
    font-size: .9rem;
}

.pricing-desc { color: var(--muted); margin-bottom: 1rem; }

.pricing-list {
    list-style: none;
    margin-bottom: 1.2rem;
}

.pricing-list li {
    position: relative;
    padding-left: 1.2rem;
    margin-bottom: .55rem;
    color: #d1d5db;
    font-size: .92rem;
}

.pricing-list li::before {
    content: "+";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}

.pricing-note {
    color: var(--muted);
    font-size: .85rem;
    margin-bottom: 1rem;
}

.steps-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.step-item {
    background: rgba(255,255,255,.03);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.2rem;
}

.step-item span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--primary-soft);
    color: var(--primary);
    font-weight: 800;
    margin-bottom: .8rem;
}

.step-item small { color: var(--muted); }

.faq-grid { display: grid; gap: .8rem; max-width: 820px; }

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1rem 1.2rem;
}

.faq-item summary {
    cursor: pointer;
    font-weight: 600;
}

.faq-item p {
    color: var(--muted);
    margin-top: .7rem;
    font-size: .92rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1.2fr .9fr .9fr;
    gap: 1.2rem;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.6rem;
}

.contact-card h2 {
    font-size: 1rem;
    margin: 1rem 0 .4rem;
    color: var(--muted);
}

.contact-card h2:first-child { margin-top: 0; }

.contact-main .contact-id,
.contact-main .wechat-id {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    margin: .5rem 0 1rem;
    letter-spacing: .04em;
}

.muted { color: var(--muted); }

.arch-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .8rem;
}

.arch-node {
    width: 100%;
    text-align: center;
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,.03);
}

.arch-node small { color: var(--muted); }

.arch-accent { border-color: rgba(229,9,20,.35); }

.arch-arrow {
    color: var(--muted);
    font-size: .85rem;
}

.site-footer {
    margin-top: auto;
    border-top: 1px solid var(--border);
    background: #050508;
    padding-top: 3rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 2rem;
    padding-bottom: 2rem;
}

.footer-brand p {
    color: var(--muted);
    margin-top: .8rem;
    font-size: .92rem;
}

.footer-domain { color: #fff; font-weight: 600; }

.footer-links h4 {
    font-size: .85rem;
    margin-bottom: .8rem;
    color: #fff;
}

.footer-links a,
.footer-links span {
    display: block;
    color: var(--muted);
    font-size: .88rem;
    margin-bottom: .45rem;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    padding: 1.2rem 0 2rem;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: .82rem;
}

@media (max-width: 960px) {
    .hero-grid,
    .split-section,
    .feature-grid,
    .feature-detail-grid,
    .pricing-grid,
    .contact-grid,
    .footer-grid,
    .steps-row { grid-template-columns: 1fr; }

    .nav-toggle { display: inline-block; }

    .site-nav {
        display: none;
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: #0d0d12;
        border-bottom: 1px solid var(--border);
        padding: .8rem;
    }

    .site-nav.open { display: flex; }

    .header-cta { display: none; }

    .cta-box,
    .cta-inline { flex-direction: column; align-items: flex-start; }
}

.changelog-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 1.5rem;
    align-items: start;
}

.block-title {
    font-size: 1.2rem;
    margin-bottom: 1.2rem;
}

.changelog-item {
    border-left: 3px solid var(--primary);
    padding: 0 0 1.5rem 1.2rem;
    margin-bottom: 1.5rem;
}

.changelog-meta {
    display: flex;
    align-items: center;
    gap: .8rem;
    margin-bottom: .5rem;
    flex-wrap: wrap;
}

.changelog-ver {
    display: inline-block;
    padding: .15rem .55rem;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: .78rem;
    font-weight: 700;
}

.changelog-meta time {
    color: var(--muted);
    font-size: .82rem;
}

.changelog-item h3 {
    font-size: 1.1rem;
    margin-bottom: .6rem;
}

.changelog-body {
    color: var(--muted);
    font-size: .92rem;
    line-height: 1.75;
}

.changelog-side { display: grid; gap: 1rem; }

.side-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.2rem;
}

.side-card h3 {
    font-size: .95rem;
    margin-bottom: .8rem;
}

.notice-box {
    border-radius: 10px;
    padding: .85rem 1rem;
    margin-bottom: .7rem;
    font-size: .88rem;
    line-height: 1.65;
    border: 1px solid var(--border);
    background: rgba(255,255,255,.03);
}

.notice-box strong {
    display: block;
    margin-bottom: .35rem;
}

.notice-box small {
    display: block;
    margin-top: .5rem;
    color: var(--muted);
    font-size: .75rem;
}

.notice-important { border-color: rgba(229,9,20,.35); background: var(--primary-soft); }
.notice-warning { border-color: rgba(245,158,11,.35); background: rgba(245,158,11,.08); }
.notice-info { border-color: rgba(59,130,246,.25); background: rgba(59,130,246,.06); }

.demo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
}

.demo-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
}

.demo-card h2 {
    font-size: 1.15rem;
    margin-bottom: .8rem;
}

.download-meta {
    display: grid;
    gap: .6rem;
    margin: 1rem 0;
    padding: 1rem;
    border-radius: 10px;
    background: rgba(255,255,255,.03);
    border: 1px solid var(--border);
}

.download-meta div {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    font-size: .88rem;
}

.download-meta span { color: var(--muted); }
.download-meta strong { color: #fff; }

.steps-compact .step-item { padding: .9rem; }
.steps-compact .step-item p { font-size: .88rem; }

@media (max-width: 960px) {
    .changelog-layout,
    .demo-grid,
    .showcase-grid { grid-template-columns: 1fr; }
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.showcase-frame {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.browser-bar {
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: .65rem .85rem;
    background: rgba(0, 0, 0, .35);
    border-bottom: 1px solid var(--border);
}

.browser-dots {
    display: inline-flex;
    gap: .35rem;
}

.browser-dots i {
    display: block;
    width: .55rem;
    height: .55rem;
    border-radius: 50%;
    background: rgba(255, 255, 255, .18);
}

.browser-url {
    flex: 1;
    min-width: 0;
    padding: .35rem .65rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, .06);
    color: var(--muted);
    font-size: .75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.showcase-preview {
    position: relative;
    display: block;
    min-height: 320px;
    overflow: hidden;
    color: #fff;
    text-decoration: none;
}

.showcase-preview-home {
    background: linear-gradient(180deg, rgba(229, 9, 20, .08), rgba(0, 0, 0, .2));
}

.showcase-home-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: .45rem;
    padding: 1rem;
}

.showcase-home-grid img {
    width: 100%;
    aspect-ratio: 2 / 3;
    object-fit: cover;
    border-radius: 8px;
    display: block;
}

.showcase-preview-article img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
}

.showcase-article-meta {
    padding: 1rem 1.1rem 1.2rem;
    background: rgba(255, 255, 255, .03);
}

.showcase-article-meta strong {
    display: block;
    margin-bottom: .35rem;
    font-size: 1rem;
}

.showcase-article-meta span {
    color: var(--muted);
    font-size: .82rem;
}

.showcase-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: .45rem;
    background: rgba(0, 0, 0, .55);
    opacity: 0;
    transition: opacity .2s ease;
}

.showcase-preview:hover .showcase-overlay {
    opacity: 1;
}

.showcase-label {
    font-size: 1rem;
    font-weight: 700;
}

.showcase-action {
    color: var(--primary);
    font-size: .88rem;
    font-weight: 600;
}

.showcase-note {
    margin-top: 1rem;
    font-size: .85rem;
}