:root {
    --bg: #000000;
    --bg-deep: #050505;
    --surface: #0b0b0b;
    --surface-2: #121212;
    --surface-hover: #1a1a1a;
    --white: #ffffff;
    --title: #f7f7f7;
    --text: #dddddd;
    --muted: #a5a5a5;
    --dim: #727272;
    --line: rgba(255,255,255,.12);
    --line-strong: rgba(255,255,255,.40);
    --max: 1320px;
    --header-height: 132px;
}
* { box-sizing: border-box; }
html { background: var(--bg); color-scheme: dark; scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; overflow-x: hidden; background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif; line-height: 1.72; }
body.panel-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
img { display: block; max-width: 100%; height: auto; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--white); outline-offset: 4px; }
.skip-link { position: fixed; left: 16px; top: -100px; z-index: 1000; padding: 10px 14px; background: var(--white); color: #000; }
.skip-link:focus { top: 16px; }
.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.topbar { height: 34px; border-bottom: 1px solid var(--line); background: #000; font-size: 12px; color: var(--muted); }
.topbar-inner { height: 100%; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 22px; }
.topbar-links, .topbar-actions { display: flex; align-items: center; gap: 22px; }
.topbar-actions { justify-content: flex-end; }
.topbar a:hover, .text-button:hover { color: var(--white); }
.text-button { padding: 0; border: 0; background: transparent; cursor: pointer; }
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(0,0,0,.96); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.brand-nav { height: 66px; }
.brand-nav-inner { position: relative; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; height: 100%; }
.brand-side { display: flex; align-items: center; gap: 14px; min-width: 0; }
.brand-side-right { justify-content: flex-end; }
.nav-button, .nav-link { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 16px; border: 1px solid var(--line-strong); background: transparent; color: var(--title); cursor: pointer; white-space: nowrap; }
.nav-button:hover, .nav-link:hover { background: var(--white); color: #000; }
.current-channel { color: var(--muted); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.brand-logo { display: flex; flex-direction: column; align-items: center; justify-content: center; min-width: 170px; color: var(--white); line-height: 1; }
.brand-logo img { width: auto; max-width: 160px; max-height: 48px; object-fit: contain; }
.brand-cn { font-size: 25px; font-weight: 900; letter-spacing: .34em; text-indent: .34em; }
.brand-en { margin-top: 7px; color: var(--muted); font-size: 9px; letter-spacing: .28em; text-indent: .28em; }
.channel-nav { height: 32px; border-top: 1px solid var(--line); }
.channel-nav-inner { height: 100%; display: flex; align-items: stretch; gap: 28px; white-space: nowrap; }
.channel-link { position: relative; display: inline-flex; align-items: center; border: 0; padding: 0; background: transparent; color: var(--muted); font-size: 12px; cursor: pointer; }
.channel-link::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: var(--white); transform: scaleX(0); transition: transform .2s ease; pointer-events: none; }
.channel-link:hover, .channel-link.is-active { color: var(--white); }
.channel-link:hover::after, .channel-link.is-active::after { transform: scaleX(1); }
.more-wrap { position: relative; margin-left: auto; }
.more-button { height: 100%; }
.more-menu { visibility: hidden; position: absolute; right: 0; top: calc(100% + 1px); width: 190px; padding: 8px; border: 1px solid var(--line); background: var(--surface); box-shadow: 0 18px 46px rgba(0,0,0,.48); opacity: 0; transform: translateY(-5px); pointer-events: none; transition: opacity .18s ease, transform .18s ease, visibility .18s; }
.more-menu.is-open { visibility: visible; opacity: 1; transform: translateY(0); pointer-events: auto; }
.more-menu a { display: block; padding: 11px 12px; color: var(--muted); }
.more-menu a:hover { background: var(--surface-hover); color: var(--white); }
.site-main { display: block; min-height: 60vh; }
.section { padding: 92px 0; border-bottom: 1px solid var(--line); }
.section-tight { padding: 64px 0; }
.section-heading { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(260px, .8fr); gap: 40px; align-items: end; margin-bottom: 42px; }
.eyebrow { display: block; margin-bottom: 14px; color: var(--muted); font-size: 11px; letter-spacing: .22em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { color: var(--title); line-height: 1.18; }
h1 { max-width: 940px; margin-bottom: 24px; font-size: clamp(40px, 7vw, 92px); letter-spacing: -.055em; }
h2 { margin-bottom: 18px; font-size: clamp(27px, 3.5vw, 48px); letter-spacing: -.035em; }
h3 { margin-bottom: 12px; font-size: 19px; }
p { margin-bottom: 18px; }
.lead { max-width: 780px; color: var(--text); font-size: clamp(17px, 2vw, 22px); }
.muted { color: var(--muted); }
.dim { color: var(--dim); }
.kicker-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 24px; }
.kicker { display: inline-flex; min-height: 28px; align-items: center; padding: 0 10px; border: 1px solid var(--line); color: var(--muted); font-size: 11px; letter-spacing: .08em; }
.hero { min-height: calc(100vh - 132px); display: flex; align-items: center; border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(350px, .65fr); gap: 56px; align-items: center; padding: 54px 0; }
.hero-visual, .media-frame { position: relative; overflow: hidden; min-height: 590px; background: linear-gradient(135deg, #1a1a1a 0%, #050505 58%, #202020 100%); border: 1px solid var(--line); box-shadow: 0 18px 46px rgba(0,0,0,.48); }
.hero-visual::before, .media-frame::before { content: ""; position: absolute; inset: 0; background: repeating-linear-gradient(90deg, transparent 0, transparent 12%, rgba(255,255,255,.025) 12.1%, transparent 12.2%); pointer-events: none; }
.hero-visual::after { content: "MADOU / ORIGINAL IMAGE"; position: absolute; left: 24px; bottom: 22px; color: rgba(255,255,255,.5); font-size: 10px; letter-spacing: .28em; }
.hero-visual img, .media-frame img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(1) saturate(.2) contrast(1.04); }
.hero-copy h1 { font-size: clamp(45px, 6vw, 82px); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0; }
.button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; padding: 0 20px; border: 1px solid var(--line-strong); white-space: nowrap; }
.button-primary { background: var(--white); color: #000; }
.button-secondary { background: transparent; color: var(--white); }
.button:hover { transform: translateY(-1px); }
.hero-notes { display: grid; gap: 1px; margin-top: 38px; background: var(--line); }
.hero-note { display: grid; grid-template-columns: 92px 1fr; gap: 20px; padding: 16px 18px; background: var(--surface); }
.hero-note strong { color: var(--white); font-size: 13px; }
.hero-note span { color: var(--muted); font-size: 13px; }
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.card-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card-grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card { min-height: 260px; padding: 30px; background: var(--surface); }
.card:hover { background: var(--surface-hover); }
.card-number { display: block; margin-bottom: 48px; color: var(--dim); font-size: 11px; letter-spacing: .2em; }
.card p { color: var(--muted); }
.card .meta { display: block; margin-top: 24px; color: var(--dim); font-size: 12px; }
.card-link { display: inline-flex; margin-top: 10px; border-bottom: 1px solid var(--line-strong); color: var(--white); font-size: 13px; }
.feature-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(320px, .75fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.feature-main, .feature-side { background: var(--surface); }
.feature-main { padding: 42px; }
.feature-side { display: grid; grid-template-columns: 1fr 1fr; }
.feature-mini { min-height: 250px; padding: 28px; border-left: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.feature-mini:nth-last-child(-n+2) { border-bottom: 0; }
.feature-main h2 { max-width: 720px; }
.feature-main p { max-width: 750px; color: var(--muted); }
.index-list { border-top: 1px solid var(--line); }
.index-item { display: grid; grid-template-columns: 58px 220px 1fr 160px; gap: 24px; align-items: center; min-height: 104px; border-bottom: 1px solid var(--line); }
.index-item:hover { background: var(--surface); }
.index-item .num { color: var(--dim); font-size: 12px; }
.index-item h3 { margin: 0; }
.index-item p { margin: 0; color: var(--muted); }
.index-item .status { color: var(--muted); font-size: 12px; text-align: right; }
.page-hero { padding: 100px 0 72px; border-bottom: 1px solid var(--line); background: radial-gradient(circle at 80% 10%, rgba(255,255,255,.06), transparent 32%); }
.page-hero h1 { margin-bottom: 26px; }
.page-hero .lead { max-width: 880px; }
.breadcrumbs { display: flex; gap: 10px; margin-bottom: 50px; color: var(--dim); font-size: 12px; }
.breadcrumbs a:hover { color: var(--white); }
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .42fr); gap: 70px; align-items: start; }
.prose { max-width: 800px; }
.prose h2 { margin-top: 50px; font-size: 32px; }
.prose h3 { margin-top: 32px; }
.prose p { color: var(--text); }
.note-box { padding: 26px; border: 1px solid var(--line); background: var(--surface); }
.note-box h2, .note-box h3 { font-size: 18px; }
.note-box p, .note-box li { color: var(--muted); font-size: 14px; }
.note-box ul { margin: 0; padding-left: 18px; }
.sticky-note { position: sticky; top: 160px; }
.topic-list { display: grid; gap: 18px; }
.topic { padding: 30px; border: 1px solid var(--line); background: var(--surface); }
.topic p { color: var(--muted); }
.topic-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; color: var(--dim); font-size: 12px; }
.process { counter-reset: step; display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.process article { counter-increment: step; display: grid; grid-template-columns: 90px 220px 1fr; gap: 30px; padding: 30px; background: var(--surface); }
.process article::before { content: counter(step, decimal-leading-zero); color: var(--dim); font-size: 12px; letter-spacing: .18em; }
.process article p { margin: 0; color: var(--muted); }
.faq-list { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { position: relative; padding: 24px 48px 24px 0; color: var(--title); font-weight: 650; cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 8px; top: 22px; color: var(--muted); font-size: 22px; }
details[open] summary::after { content: "−"; }
details p { max-width: 900px; padding: 0 48px 24px 0; color: var(--muted); }
.callout { padding: 46px; border: 1px solid var(--line-strong); background: var(--surface); }
.callout h2 { max-width: 780px; }
.callout p { max-width: 820px; color: var(--muted); }
.app-showcase { display: grid; grid-template-columns: minmax(320px, .75fr) minmax(0, 1.25fr); gap: 60px; align-items: center; }
.app-image { min-height: 540px; background: linear-gradient(160deg, #242424, #050505 62%); border: 1px solid var(--line); }
.app-image img { width: 100%; height: 100%; object-fit: contain; filter: grayscale(1); }
.service-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin-top: 28px; background: var(--line); border: 1px solid var(--line); }
.service-list div { padding: 22px; background: var(--surface); }
.service-list strong { display: block; color: var(--white); }
.service-list span { color: var(--muted); font-size: 13px; }
.site-footer { padding: 72px 0 28px; background: #000; }
.footer-grid { display: grid; grid-template-columns: 1.8fr repeat(4, 1fr); gap: 46px; }
.footer-grid h2 { margin-bottom: 20px; font-size: 13px; letter-spacing: .08em; }
.footer-grid a { display: block; margin: 10px 0; color: var(--muted); font-size: 13px; }
.footer-grid a:hover { color: var(--white); }
.footer-brand p { max-width: 330px; color: var(--muted); font-size: 13px; }
.footer-logo { display: inline-flex; flex-direction: column; margin-bottom: 20px; }
.footer-logo img { max-width: 150px; max-height: 50px; object-fit: contain; }
.footer-notice { margin-top: 62px; padding-top: 24px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 40px; color: var(--dim); font-size: 12px; }
.footer-notice p:first-child { max-width: 850px; }
.overlay { visibility: hidden; position: fixed; inset: 0; z-index: 190; background: rgba(0,0,0,.78); opacity: 0; pointer-events: none; transition: opacity .22s ease, visibility .22s; }
.overlay.is-open { visibility: visible; opacity: 1; pointer-events: auto; }
.site-panel { visibility: hidden; position: fixed; inset: 0 auto 0 0; z-index: 200; width: min(520px, 90vw); overflow-y: auto; background: var(--bg-deep); border-right: 1px solid var(--line-strong); transform: translateX(-100%); pointer-events: none; transition: transform .25s ease, visibility .25s; }
.site-panel.is-open { visibility: visible; transform: translateX(0); pointer-events: auto; }
.panel-head { position: sticky; top: 0; z-index: 2; display: flex; align-items: center; justify-content: space-between; min-height: 78px; padding: 14px 22px; border-bottom: 1px solid var(--line); background: rgba(5,5,5,.96); }
.panel-brand { display: flex; flex-direction: column; }
.panel-brand img { max-width: 150px; max-height: 45px; object-fit: contain; }
.panel-brand strong { color: var(--white); font-size: 22px; letter-spacing: .25em; }
.panel-brand span { color: var(--muted); font-size: 9px; letter-spacing: .2em; }
.icon-button { min-height: 42px; padding: 0 14px; border: 1px solid var(--line-strong); background: transparent; cursor: pointer; }
.icon-button:hover { background: var(--white); color: #000; }
.panel-content { padding: 22px; }
.panel-content section { padding: 20px 0; border-bottom: 1px solid var(--line); }
.panel-content h2 { margin-bottom: 12px; color: var(--dim); font-size: 11px; letter-spacing: .18em; }
.panel-content a { display: grid; grid-template-columns: 110px 1fr; gap: 18px; padding: 12px 10px; }
.panel-content a:hover { background: var(--surface-hover); }
.panel-content b { color: var(--white); font-size: 14px; }
.panel-content span { color: var(--muted); font-size: 12px; }
.search-panel { visibility: hidden; position: fixed; inset: 0; z-index: 210; overflow-y: auto; background: rgba(0,0,0,.98); opacity: 0; pointer-events: none; transition: opacity .22s ease, visibility .22s; }
.search-panel.is-open { visibility: visible; opacity: 1; pointer-events: auto; }
.search-panel-inner { padding-top: 44px; padding-bottom: 80px; }
.search-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 80px; color: var(--muted); font-size: 12px; letter-spacing: .16em; }
.search-panel label { display: block; margin-bottom: 16px; color: var(--muted); font-size: 13px; }
.search-panel input { width: 100%; height: 84px; border: 0; border-bottom: 1px solid var(--line-strong); background: transparent; color: var(--white); font-size: clamp(26px, 5vw, 56px); outline: 0; }
.search-panel input::placeholder { color: #555; }
.search-groups { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin-top: 68px; }
.search-groups h2 { font-size: 13px; letter-spacing: .1em; }
.search-links a { display: block; padding: 12px 0; border-bottom: 1px solid var(--line); color: var(--muted); }
.search-links a:hover { color: var(--white); }
.search-empty { margin-top: 34px; color: var(--muted); }
.mobile-nav { display: none; }
@media (max-width: 1050px) {
    .hero-grid, .feature-grid, .app-showcase, .split { grid-template-columns: 1fr; }
    .hero { min-height: 0; }
    .hero-copy { order: -1; }
    .hero-visual { min-height: 56vw; }
    .feature-side { border-top: 1px solid var(--line); }
    .section-heading { grid-template-columns: 1fr; gap: 12px; }
    .card-grid.four { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1.4fr repeat(2, 1fr); }
    .sticky-note { position: static; }
    .index-item { grid-template-columns: 48px 180px 1fr; }
    .index-item .status { grid-column: 3; text-align: left; }
}
@media (max-width: 760px) {
    :root { --header-height: 98px; }
    body { padding-bottom: calc(58px + env(safe-area-inset-bottom)); }
    .container { width: min(calc(100% - 28px), var(--max)); }
    .topbar { height: 32px; }
    .topbar-inner { grid-template-columns: 1fr auto; gap: 10px; }
    .topbar-links { display: none; }
    .topbar-brand { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .topbar-actions { gap: 14px; }
    .topbar-actions > a:first-child { display: none; }
    .brand-nav { height: 66px; }
    .brand-nav-inner { grid-template-columns: 1fr auto 1fr; gap: 8px; }
    .current-channel, .desktop-only { display: none !important; }
    .nav-button { min-height: 42px; padding: 0 11px; font-size: 12px; }
    .brand-logo { min-width: 112px; }
    .brand-cn { font-size: 20px; }
    .brand-en { font-size: 7px; }
    .channel-nav { height: 38px; overflow: hidden; }
    .channel-nav-inner { width: 100%; padding: 0 14px; overflow-x: auto; gap: 24px; scrollbar-width: none; }
    .channel-nav-inner::-webkit-scrollbar { display: none; }
    .more-wrap { margin-left: 0; }
    .more-menu { position: fixed; left: 14px; right: 14px; top: 137px; width: auto; }
    .section { padding: 68px 0; }
    .section-tight { padding: 50px 0; }
    .page-hero { padding: 76px 0 52px; }
    .breadcrumbs { margin-bottom: 34px; }
    h1 { font-size: clamp(38px, 13vw, 62px); }
    h2 { font-size: 30px; }
    .hero-grid { gap: 34px; padding: 44px 0 54px; }
    .hero-copy h1 { font-size: clamp(42px, 14vw, 64px); }
    .hero-visual { min-height: 68vw; }
    .hero-note { grid-template-columns: 80px 1fr; gap: 12px; padding: 14px; }
    .card-grid, .card-grid.two, .card-grid.four { grid-template-columns: 1fr; }
    .card { min-height: 0; padding: 26px 22px; }
    .card-number { margin-bottom: 28px; }
    .feature-main { padding: 28px 22px; }
    .feature-side { grid-template-columns: 1fr; }
    .feature-mini { min-height: 0; border-left: 0; border-bottom: 1px solid var(--line) !important; }
    .feature-mini:last-child { border-bottom: 0 !important; }
    .index-item { grid-template-columns: 40px 1fr; gap: 10px 14px; padding: 20px 0; }
    .index-item p, .index-item .status { grid-column: 2; }
    .process article { grid-template-columns: 42px 1fr; gap: 10px 14px; padding: 24px 20px; }
    .process article p { grid-column: 2; }
    .service-list { grid-template-columns: 1fr; }
    .app-image { min-height: 92vw; }
    .callout { padding: 30px 22px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 34px 22px; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-notice { flex-direction: column; gap: 8px; }
    .panel-content a { grid-template-columns: 96px 1fr; padding-inline: 4px; }
    .search-panel-inner { padding-top: 24px; }
    .search-head { margin-bottom: 54px; }
    .search-panel input { height: 66px; }
    .search-groups { grid-template-columns: 1fr; gap: 28px; margin-top: 48px; }
    .mobile-nav { position: fixed; left: 0; right: 0; bottom: 0; z-index: 150; display: grid; grid-template-columns: repeat(5, 1fr); min-height: 58px; padding-bottom: env(safe-area-inset-bottom); border-top: 1px solid var(--line); background: rgba(0,0,0,.98); }
    .mobile-nav a { display: flex; min-height: 58px; align-items: center; justify-content: center; color: var(--dim); font-size: 12px; }
    .mobile-nav a.is-active { color: var(--white); }
    body.panel-open .mobile-nav { visibility: hidden; pointer-events: none; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}