/* 521AI API 文档站 · 公共样式（门户 + 文档正文 + 后台共用的令牌与组件） */

@font-face {
  font-family: "Sora";
  src: url("fonts/sora-latin-wght.woff2") format("woff2");
  font-weight: 100 800;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2013-2014, U+2022, U+2026, U+20AC, U+2122, U+2190-2193, U+2212;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("fonts/jetbrains-mono-latin-wght.woff2") format("woff2");
  font-weight: 100 800;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2013-2014, U+2022, U+2026, U+20AC, U+2122, U+2190-2193, U+2212;
}

/* ------------------------------------------------------------ 令牌 */

:root {
  --font-display: "Sora", "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Cascadia Code", Consolas, Menlo, "Liberation Mono", "Microsoft YaHei UI", monospace;

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 18px;
  --topbar-h: 64px;
  --ease: cubic-bezier(.2, .7, .2, 1);

  color-scheme: dark;
  --bg: #05070d;
  --veil: 5, 7, 13;
  --surface: rgba(13, 17, 28, 0.66);
  --surface-2: rgba(18, 23, 36, 0.78);
  --surface-strong: rgba(9, 12, 20, 0.86);
  --surface-hover: rgba(255, 255, 255, 0.05);
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.15);
  --text: #eaeef6;
  --text-2: #bcc4d3;
  --muted: #8b94a7;
  --faint: #5e6779;
  --inline-code-bg: rgba(255, 255, 255, 0.07);
  --code-bg: rgba(4, 6, 11, 0.9);
  --code-bar: rgba(255, 255, 255, 0.035);
  --code-text: #dfe6f2;
  --shadow: 0 30px 80px -30px rgba(0, 0, 0, 0.75);
  --ok: #4fd69c;
  --warn: #f5b454;
  --danger: #ff6b6b;
  --warn-soft: rgba(245, 180, 84, 0.1);
  --tip-soft: rgba(79, 214, 156, 0.09);
  --danger-soft: rgba(255, 107, 107, 0.1);

  --accent: #e2bd72;
  --accent-strong: #f4d79a;
  --accent-ink: #1c1406;
  --accent-soft: rgba(226, 189, 114, 0.13);
  --accent-line: rgba(226, 189, 114, 0.38);
  --link: #9ccbff;
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #eef0f5;
  --veil: 240, 242, 247;
  --surface: rgba(255, 255, 255, 0.66);
  --surface-2: rgba(255, 255, 255, 0.8);
  --surface-strong: rgba(255, 255, 255, 0.92);
  --surface-hover: rgba(15, 23, 42, 0.045);
  --line: rgba(15, 23, 42, 0.09);
  --line-strong: rgba(15, 23, 42, 0.16);
  --text: #121723;
  --text-2: #364052;
  --muted: #626c80;
  --faint: #98a1b2;
  --inline-code-bg: rgba(15, 23, 42, 0.06);
  --code-bg: #0d121d;
  --code-bar: rgba(255, 255, 255, 0.04);
  --code-text: #e1e7f2;
  --shadow: 0 30px 70px -35px rgba(15, 23, 42, 0.35);
  --ok: #138a5a;
  --warn: #b26b00;
  --danger: #c93636;
  --warn-soft: rgba(212, 140, 20, 0.1);
  --tip-soft: rgba(19, 138, 90, 0.08);
  --danger-soft: rgba(201, 54, 54, 0.08);

  --accent: #a6781f;
  --accent-strong: #8a6214;
  --accent-ink: #fffaf0;
  --accent-soft: rgba(166, 120, 31, 0.11);
  --accent-line: rgba(166, 120, 31, 0.4);
  --link: #1c5fc4;
}

[data-accent="cyan"] { --accent: #5fd3e6; --accent-strong: #9be9f5; --accent-ink: #03161a; --accent-soft: rgba(95, 211, 230, 0.13); --accent-line: rgba(95, 211, 230, 0.4); }
[data-accent="violet"] { --accent: #a995ff; --accent-strong: #cbbfff; --accent-ink: #120a2b; --accent-soft: rgba(169, 149, 255, 0.14); --accent-line: rgba(169, 149, 255, 0.42); }
[data-accent="rose"] { --accent: #ff8fae; --accent-strong: #ffc0d1; --accent-ink: #2b0712; --accent-soft: rgba(255, 143, 174, 0.13); --accent-line: rgba(255, 143, 174, 0.4); }
[data-accent="emerald"] { --accent: #5be0a6; --accent-strong: #9cf0c9; --accent-ink: #03190f; --accent-soft: rgba(91, 224, 166, 0.13); --accent-line: rgba(91, 224, 166, 0.4); }
[data-theme="light"][data-accent="cyan"] { --accent: #0b7f95; --accent-strong: #08667a; --accent-ink: #f2fdff; --accent-soft: rgba(11, 127, 149, 0.1); --accent-line: rgba(11, 127, 149, 0.4); }
[data-theme="light"][data-accent="violet"] { --accent: #6a4fd6; --accent-strong: #5338b8; --accent-ink: #faf8ff; --accent-soft: rgba(106, 79, 214, 0.1); --accent-line: rgba(106, 79, 214, 0.4); }
[data-theme="light"][data-accent="rose"] { --accent: #c2335e; --accent-strong: #a1244a; --accent-ink: #fff7f9; --accent-soft: rgba(194, 51, 94, 0.09); --accent-line: rgba(194, 51, 94, 0.38); }
[data-theme="light"][data-accent="emerald"] { --accent: #13845a; --accent-strong: #0d6a47; --accent-ink: #f3fff9; --accent-soft: rgba(19, 132, 90, 0.1); --accent-line: rgba(19, 132, 90, 0.38); }

/* ------------------------------------------------------------ 基础 */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--topbar-h) + 20px); }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.7 var(--font-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
code, kbd, samp, pre { font-family: var(--font-mono); }
button { cursor: pointer; }
[hidden] { display: none !important; }
::selection { background: var(--accent-soft); color: var(--text); }
:focus-visible { outline: 2px solid var(--accent-line); outline-offset: 2px; }
.mono { font-family: var(--font-mono); }
.muted { color: var(--muted); }

/* ------------------------------------------------------------ 壁纸 */

.wall { position: fixed; inset: 0; z-index: -1; overflow: hidden; background: var(--bg); }
.wall-img {
  position: absolute; inset: -60px;
  background-position: center; background-size: cover; background-repeat: no-repeat;
  filter: blur(var(--wall-blur, 0px));
  opacity: 0; transform: scale(1.03);
  transition: opacity 1.1s var(--ease), transform 1.6s var(--ease);
}
.wall.ready .wall-img { opacity: 1; transform: scale(1); }
.wall-veil {
  position: absolute; inset: 0;
  background:
    radial-gradient(120% 80% at 50% -10%, rgba(var(--veil), 0) 0%, rgba(var(--veil), calc(var(--wall-dim, .45) * .5)) 60%),
    linear-gradient(180deg, rgba(var(--veil), calc(var(--wall-dim, .45) * .55)) 0%, rgba(var(--veil), var(--wall-dim, .45)) 45%, rgba(var(--veil), min(.97, calc(var(--wall-dim, .45) + .3))) 100%);
  transition: background .4s;
}
body.reading .wall-veil { background: rgba(var(--veil), min(.92, calc(var(--wall-dim, .45) + .3))); }
.wall-grain {
  position: absolute; inset: 0; opacity: .07; mix-blend-mode: overlay; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 .9 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ------------------------------------------------------------ 通用组件 */

.glass {
  background: var(--surface);
  border: 1px solid var(--line);
  backdrop-filter: blur(22px) saturate(150%);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 42px; padding: 0 18px; border-radius: 10px;
  border: 1px solid var(--line-strong); background: var(--surface-2);
  font-weight: 600; font-size: 14px; letter-spacing: .01em; white-space: nowrap;
  transition: transform .18s var(--ease), background .18s, border-color .18s, box-shadow .18s, filter .18s;
}
.btn:hover { border-color: var(--accent-line); background: var(--surface-hover); }
.btn svg { width: 16px; height: 16px; flex: none; }
.btn:active { transform: translateY(1px); }
.btn.primary {
  border-color: transparent; color: var(--accent-ink);
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  box-shadow: 0 10px 30px -12px var(--accent-line);
}
.btn.primary:hover { filter: brightness(1.06); box-shadow: 0 14px 36px -12px var(--accent-line); }
.btn.sm { height: 32px; padding: 0 12px; font-size: 13px; border-radius: 8px; }
.btn.danger { color: var(--danger); }
.btn.danger:hover { border-color: var(--danger); background: var(--danger-soft); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.icon-btn {
  display: inline-grid; place-items: center; width: 36px; height: 36px; border-radius: 10px;
  border: 1px solid var(--line); background: transparent; color: var(--text-2);
  transition: background .18s, color .18s, border-color .18s;
}
.icon-btn:hover { background: var(--surface-hover); color: var(--text); border-color: var(--line-strong); }
.icon-btn svg { width: 18px; height: 18px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px; height: 24px; padding: 0 10px; border-radius: 999px;
  font-size: 12px; letter-spacing: .02em; color: var(--text-2); background: var(--surface-hover); border: 1px solid var(--line);
}
.badge {
  display: inline-flex; align-items: center; height: 22px; padding: 0 8px; border-radius: 6px;
  font-size: 11.5px; font-weight: 600; letter-spacing: .04em;
  color: var(--accent-strong); background: var(--accent-soft); border: 1px solid var(--accent-line);
}
.badge.draft { color: var(--warn); background: var(--warn-soft); border-color: rgba(245, 180, 84, .35); }
kbd {
  font: 600 11px/1 var(--font-mono); padding: 3px 6px; border-radius: 5px;
  border: 1px solid var(--line-strong); color: var(--muted); background: var(--surface-hover);
}
.toast-host { position: fixed; left: 50%; bottom: calc(28px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%); z-index: 90; display: grid; gap: 8px; pointer-events: none; }
.toast {
  padding: 10px 16px; border-radius: 10px; font-size: 13.5px; color: var(--text);
  background: var(--surface-strong); border: 1px solid var(--line-strong); box-shadow: var(--shadow);
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  animation: toast-in .25s var(--ease);
}
.toast.err { border-color: rgba(255, 107, 107, .5); }
.toast.ok::before { content: "✓"; color: var(--ok); margin-right: 8px; font-weight: 700; }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } }

/* ------------------------------------------------------------ 顶栏 */

.topbar {
  position: sticky; top: 0; z-index: 40;
  padding-top: env(safe-area-inset-top, 0px);
  background: rgba(var(--veil), .55);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
}
.topbar-in { max-width: 1480px; height: var(--topbar-h); margin: 0 auto; padding: 0 24px; display: flex; align-items: center; gap: 28px; }
.brand { display: flex; align-items: center; gap: 11px; font: 650 16.5px/1 var(--font-display); letter-spacing: .01em; white-space: nowrap; }
.brand-mark { width: 30px; height: 30px; flex: none; }
.brand-mark .g1 { stop-color: var(--accent-strong); }
.brand-mark .g2 { stop-color: var(--accent); }
.brand-mark .frame { fill: var(--surface-strong); }
.brand small { font: 500 12px/1 var(--font-body); color: var(--muted); padding-left: 11px; border-left: 1px solid var(--line-strong); letter-spacing: .06em; }
.nav { display: flex; align-items: center; gap: 4px; flex: 1; min-width: 0; }
.nav a { position: relative; padding: 8px 12px; border-radius: 8px; font-size: 14px; color: var(--text-2); white-space: nowrap; transition: color .15s, background .15s; }
.nav a:hover { color: var(--text); background: var(--surface-hover); }
.nav a.active { color: var(--text); }
.nav a.active::after { content: ""; position: absolute; left: 12px; right: 12px; bottom: -13px; height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--accent-strong), var(--accent)); }
.top-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.search-btn {
  display: flex; align-items: center; gap: 10px; height: 36px; padding: 0 8px 0 12px; min-width: 230px;
  border-radius: 10px; border: 1px solid var(--line); background: var(--surface-hover); color: var(--muted); font-size: 13.5px;
  transition: border-color .15s, color .15s;
}
.search-btn:hover { border-color: var(--accent-line); color: var(--text-2); }
.search-btn svg { width: 16px; height: 16px; }
.search-btn kbd { margin-left: auto; }
.menu-btn { display: none; }
.notice { position: relative; z-index: 30; background: linear-gradient(90deg, var(--accent-soft), transparent 70%); border-bottom: 1px solid var(--line); }
.notice-in { max-width: 1480px; margin: 0 auto; padding: 9px 24px; display: flex; align-items: center; gap: 12px; font-size: 13.5px; color: var(--text-2); }
.notice-in b { color: var(--accent-strong); font-weight: 600; letter-spacing: .06em; font-size: 12px; }
.notice-in button { margin-left: auto; background: none; border: 0; color: var(--muted); font-size: 18px; line-height: 1; padding: 0 4px; }

/* ------------------------------------------------------------ 首页 */

.page { max-width: 1240px; margin: 0 auto; padding: 0 24px; }
.hero { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 56px; align-items: center; padding-block: 92px 64px; }
.eyebrow { display: flex; align-items: center; gap: 12px; margin: 0 0 22px; font: 600 12px/1 var(--font-display); letter-spacing: .26em; color: var(--accent); text-transform: uppercase; }
.eyebrow::before { content: ""; width: 28px; height: 1px; background: linear-gradient(90deg, transparent, var(--accent)); }
.hero h1 {
  margin: 0; font: 700 clamp(40px, 5.6vw, 70px)/1.06 var(--font-display); letter-spacing: -.02em; text-wrap: balance;
  background: linear-gradient(180deg, var(--text) 30%, color-mix(in srgb, var(--text) 55%, var(--accent)) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-tagline { margin: 18px 0 0; font: 500 clamp(18px, 2vw, 22px)/1.5 var(--font-display); color: var(--text-2); letter-spacing: .02em; }
.hero-desc { margin: 14px 0 0; max-width: 34em; color: var(--muted); font-size: 15.5px; }
.base-url {
  display: inline-flex; align-items: center; gap: 12px; max-width: 100%; margin-top: 30px; padding: 6px 6px 6px 14px;
  border-radius: 12px; background: var(--surface); border: 1px solid var(--line-strong);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
}
.base-url span { flex: none; font: 600 10.5px/1 var(--font-display); letter-spacing: .2em; color: var(--accent); }
.base-url code { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font: 500 14px/1 var(--font-mono); color: var(--text); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-actions .btn { height: 46px; padding: 0 22px; font-size: 14.5px; }

.window { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); background: var(--code-bg); border: 1px solid var(--line-strong); }
.window-bar { display: flex; align-items: center; gap: 7px; height: 40px; padding: 0 14px; background: var(--code-bar); border-bottom: 1px solid rgba(255, 255, 255, .06); }
.window-bar i { width: 10px; height: 10px; border-radius: 50%; background: rgba(255, 255, 255, .14); }
.window-bar em { margin-left: 10px; font: 500 12px/1 var(--font-mono); font-style: normal; color: #8f99ad; letter-spacing: .02em; }
.window-bar .live { margin-left: auto; display: flex; align-items: center; gap: 6px; font: 600 10.5px/1 var(--font-display); letter-spacing: .16em; color: #7ee2b0; }
.window-bar .live::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: #4fd69c; box-shadow: 0 0 10px #4fd69c; }
.window pre { margin: 0; padding: 18px 20px; overflow-x: auto; font: 13px/1.75 var(--font-mono); color: var(--code-text); }
.window pre code { font: inherit; }
.window .sep { height: 1px; margin: 0 20px; background: repeating-linear-gradient(90deg, rgba(255, 255, 255, .12) 0 6px, transparent 6px 12px); }
.window .resp-label { display: flex; gap: 10px; align-items: center; padding: 14px 20px 0; font: 600 11px/1 var(--font-mono); letter-spacing: .08em; color: #7ee2b0; }
.window .resp-label span { color: #8f99ad; font-weight: 500; letter-spacing: 0; }

.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-radius: var(--radius-lg); overflow: hidden; }
.stat { padding: 20px 24px; display: grid; gap: 6px; }
.stat + .stat { border-left: 1px solid var(--line); }
.stat b { font: 650 28px/1 var(--font-display); font-variant-numeric: tabular-nums; letter-spacing: -.01em; }
.stat span { color: var(--muted); font-size: 13px; }

.section { padding-block: 72px 8px; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 26px; }
.section-head .idx { display: block; margin-bottom: 10px; font: 600 12px/1 var(--font-mono); color: var(--accent); letter-spacing: .14em; }
.section-head h2 { margin: 0; font: 650 28px/1.2 var(--font-display); letter-spacing: -.01em; }
.section-head p { margin: 8px 0 0; color: var(--muted); max-width: 46em; }
.section-head .more { color: var(--text-2); font-size: 14px; white-space: nowrap; }
.section-head .more:hover { color: var(--accent-strong); }

.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); grid-auto-flow: dense; gap: 16px; }
.card.wide { grid-column: span 2; }
.card.solo { grid-column: 1 / -1; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 12px 48px; align-items: center; }
.card.solo .solo-l { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.card.solo .card-models { align-content: center; }
.card.solo .card-foot { margin-top: 6px; }
.card.solo.bare { grid-template-columns: minmax(0, 1fr) auto; }
.card.solo.bare .card-foot { margin: 0; padding: 0; border: 0; gap: 18px; }
.card {
  position: relative; display: flex; flex-direction: column; gap: 12px; padding: 22px 22px 18px; border-radius: 16px;
  background: var(--surface); border: 1px solid var(--line);
  backdrop-filter: blur(20px) saturate(140%); -webkit-backdrop-filter: blur(20px) saturate(140%);
  transition: transform .25s var(--ease), border-color .25s, background .25s, box-shadow .25s;
}
.card::before { content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; background: radial-gradient(80% 60% at 0% 0%, var(--accent-soft), transparent 60%); opacity: 0; transition: opacity .3s; }
.card:hover { transform: translateY(-3px); border-color: var(--accent-line); background: var(--surface-2); box-shadow: var(--shadow); }
.card:hover::before { opacity: 1; }
.card-top { display: flex; align-items: center; gap: 8px; min-height: 24px; }
.card h3 { margin: 0; font: 650 18.5px/1.35 var(--font-display); letter-spacing: -.005em; }
.card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.65; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-models { display: flex; flex-wrap: wrap; gap: 6px; }
.card-models code { font: 500 12px/1 var(--font-mono); padding: 6px 8px; border-radius: 6px; background: var(--inline-code-bg); color: var(--text-2); max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card-models em { font-style: normal; font-size: 12px; color: var(--faint); align-self: center; }
.card-foot { margin-top: auto; display: flex; align-items: center; gap: 14px; padding-top: 14px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12.5px; font-variant-numeric: tabular-nums; }
.card-foot .arrow { margin-left: auto; color: var(--faint); transition: color .2s, transform .2s; }
.card:hover .card-foot .arrow { color: var(--accent-strong); transform: translateX(3px); }

.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.step { padding: 24px; border-radius: 16px; }
.step-no { font: 700 34px/1 var(--font-display); letter-spacing: -.02em; color: transparent; -webkit-text-stroke: 1px var(--accent-line); }
.step h3 { margin: 16px 0 6px; font: 650 17px/1.4 var(--font-display); }
.step p { margin: 0; color: var(--muted); font-size: 14px; }
.step code { font: 500 12.5px/1 var(--font-mono); color: var(--accent-strong); background: var(--inline-code-bg); padding: 3px 6px; border-radius: 5px; }

.footer { margin-top: 96px; border-top: 1px solid var(--line); background: rgba(var(--veil), .5); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.footer-in { max-width: 1480px; margin: 0 auto; padding: 28px 24px calc(28px + env(safe-area-inset-bottom, 0px)); display: flex; flex-wrap: wrap; gap: 10px 28px; align-items: center; color: var(--muted); font-size: 13px; }
.footer-in .brand { font-size: 14px; color: var(--text-2); }
.footer-in .brand-mark { width: 22px; height: 22px; }
.footer-in .spacer { flex: 1; }

/* ------------------------------------------------------------ 文档页布局 */

.doc-layout { max-width: 1480px; margin: 0 auto; padding: 28px 24px 0; display: grid; grid-template-columns: 252px minmax(0, 1fr) 232px; gap: 28px; align-items: start; }
.sidebar, .toc { position: sticky; top: calc(var(--topbar-h) + 24px); max-height: calc(100vh - var(--topbar-h) - 48px); overflow-y: auto; scrollbar-width: thin; }
.sidebar { padding: 18px 12px; border-radius: 16px; }
.side-group + .side-group { margin-top: 18px; }
.side-group h4 { margin: 0 0 6px; padding: 0 10px; font: 600 11.5px/1.8 var(--font-display); color: var(--faint); letter-spacing: .16em; text-transform: uppercase; }
.side-link { display: flex; align-items: center; gap: 8px; padding: 7px 10px; border-radius: 8px; font-size: 14px; color: var(--text-2); transition: background .15s, color .15s; }
.side-link:hover { background: var(--surface-hover); color: var(--text); }
.side-link.active { color: var(--accent-strong); background: var(--accent-soft); box-shadow: inset 2px 0 0 var(--accent); }
.side-link .n { margin-left: auto; font: 500 11px/1 var(--font-mono); color: var(--faint); }
.side-link .badge { height: 18px; font-size: 10.5px; padding: 0 5px; }

.doc-main { min-width: 0; }
.doc-card { border-radius: 18px; background: var(--surface-strong); border: 1px solid var(--line); box-shadow: var(--shadow); backdrop-filter: blur(22px) saturate(140%); -webkit-backdrop-filter: blur(22px) saturate(140%); }
.doc-head { padding: 34px 44px 26px; border-bottom: 1px solid var(--line); }
.crumbs { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: 13px; color: var(--muted); }
.crumbs a:hover { color: var(--text); }
.crumbs .sep { color: var(--faint); }
.doc-head h1 { margin: 14px 0 0; font: 700 clamp(28px, 3.4vw, 40px)/1.15 var(--font-display); letter-spacing: -.015em; text-wrap: balance; }
.doc-summary { margin: 12px 0 0; color: var(--text-2); font-size: 15.5px; max-width: 52em; }
.doc-meta { display: flex; flex-wrap: wrap; gap: 10px 18px; align-items: center; margin-top: 22px; color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; }
.doc-meta .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--faint); }
.doc-meta button.link { background: none; border: 0; padding: 0; color: var(--muted); font-size: 13px; }
.doc-meta button.link:hover { color: var(--accent-strong); }

.ver { position: relative; }
.ver-btn { display: inline-flex; align-items: center; gap: 8px; height: 32px; padding: 0 12px; border-radius: 8px; border: 1px solid var(--accent-line); background: var(--accent-soft); color: var(--accent-strong); font: 600 13px/1 var(--font-display); }
.ver-btn svg { width: 14px; height: 14px; transition: transform .2s; }
.ver.open .ver-btn svg { transform: rotate(180deg); }
.ver-menu { position: absolute; left: 0; top: calc(100% + 8px); z-index: 30; min-width: 280px; max-height: 360px; overflow-y: auto; padding: 6px; border-radius: 12px; background: var(--surface-strong); border: 1px solid var(--line-strong); box-shadow: var(--shadow); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); }
.ver-item { display: grid; grid-template-columns: auto 1fr auto; gap: 2px 10px; align-items: center; padding: 9px 10px; border-radius: 8px; color: var(--text-2); }
.ver-item:hover { background: var(--surface-hover); color: var(--text); }
.ver-item.on { background: var(--accent-soft); color: var(--accent-strong); }
.ver-item b { font: 600 13px/1.3 var(--font-display); }
.ver-item small { grid-column: 1 / -1; color: var(--muted); font-size: 12px; line-height: 1.4; }
.ver-item time { font-size: 11.5px; color: var(--faint); }
.ver-banner { display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; padding: 12px 44px; background: var(--warn-soft); border-bottom: 1px solid var(--line); color: var(--text-2); font-size: 13.5px; }
.ver-banner a { color: var(--accent-strong); font-weight: 600; }

.doc-body { padding: 8px 44px 44px; }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 18px; }
.pager a { display: grid; gap: 4px; padding: 16px 20px; border-radius: 14px; }
.pager a:hover { border-color: var(--accent-line); }
.pager small { color: var(--muted); font-size: 12px; }
.pager b { font: 600 15px/1.4 var(--font-display); }
.pager .next { text-align: right; grid-column: 2; }

.toc { padding: 4px 0 4px 4px; }
.toc h4 { margin: 0 0 10px; padding-left: 14px; font: 600 11.5px/1.8 var(--font-display); color: var(--faint); letter-spacing: .16em; text-transform: uppercase; }
.toc a { display: block; padding: 5px 10px 5px 14px; border-left: 1px solid var(--line); font-size: 13px; line-height: 1.5; color: var(--muted); transition: color .15s, border-color .15s; }
.toc a.l3 { padding-left: 26px; font-size: 12.5px; }
.toc a:hover { color: var(--text); }
.toc a.on { color: var(--accent-strong); border-left-color: var(--accent); }
.doc-tools { display: none; }

/* ------------------------------------------------------------ Markdown 正文 */

.md { font-size: 15.5px; line-height: 1.85; color: var(--text-2); overflow-wrap: break-word; }
.md > :first-child { margin-top: 24px; }
.md h1 { font: 700 30px/1.25 var(--font-display); color: var(--text); margin: 36px 0 16px; }
.md h2 {
  position: relative; margin: 56px 0 18px; padding-top: 30px; border-top: 1px solid var(--line);
  font: 650 24px/1.35 var(--font-display); letter-spacing: -.01em; color: var(--text); text-wrap: balance;
}
.md h3 { position: relative; margin: 36px 0 12px; font: 650 18.5px/1.45 var(--font-display); color: var(--text); }
.md h4 { margin: 26px 0 10px; font-size: 15.5px; color: var(--text); }
.md .anchor { position: absolute; left: -26px; padding-right: 8px; color: var(--faint); opacity: 0; font-weight: 400; transition: opacity .15s; }
.md h2 .anchor { top: 30px; }
.md h2:hover .anchor, .md h3:hover .anchor { opacity: 1; }
.md p { margin: 14px 0; }
.md strong { color: var(--text); font-weight: 650; }
.md a { color: var(--link); text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--link) 35%, transparent); text-underline-offset: 3px; }
.md a:hover { text-decoration-color: var(--link); }
.md ul, .md ol { padding-left: 1.4em; margin: 12px 0; }
.md li { margin: 6px 0; }
.md li::marker { color: var(--accent); }
.md hr { border: 0; height: 1px; background: var(--line); margin: 36px 0; }
.md hr:has(+ h2) { display: none; }
.md img { border-radius: 12px; border: 1px solid var(--line); }
.md :not(pre) > code {
  font: 500 .86em/1 var(--font-mono); padding: .22em .45em; border-radius: 6px;
  background: var(--inline-code-bg); color: var(--accent-strong); border: 1px solid var(--line); white-space: break-spaces;
}
.md a code { color: inherit; }
.md blockquote { margin: 18px 0; padding: 12px 18px; border-radius: 10px; border: 1px solid var(--line); border-left: 3px solid var(--accent); background: var(--accent-soft); color: var(--text-2); }
.md blockquote > :first-child { margin-top: 0; }
.md blockquote > :last-child { margin-bottom: 0; }
.md blockquote.warn { border-left-color: var(--warn); background: var(--warn-soft); }
.md blockquote.tip { border-left-color: var(--ok); background: var(--tip-soft); }

.table-wrap { margin: 18px 0; overflow-x: auto; border-radius: 12px; border: 1px solid var(--line); background: rgba(var(--veil), .25); }
.md table { width: 100%; border-collapse: collapse; font-size: 14px; line-height: 1.6; }
.md th { text-align: left; font: 600 12.5px/1.5 var(--font-display); letter-spacing: .04em; color: var(--text); background: var(--surface-hover); white-space: nowrap; }
.md th, .md td { padding: 11px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
.md tbody tr:last-child td { border-bottom: 0; }
.md tbody tr:hover td { background: rgba(255, 255, 255, .02); }
.md td code { white-space: nowrap; }

.code { position: relative; margin: 18px 0; border-radius: 12px; overflow: hidden; background: var(--code-bg); border: 1px solid var(--line-strong); }
.code-bar { display: flex; align-items: center; height: 36px; padding: 0 8px 0 16px; background: var(--code-bar); border-bottom: 1px solid rgba(255, 255, 255, .06); }
.code-lang { font: 600 10.5px/1 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; color: #7f8aa0; }
.code-copy { margin-left: auto; display: inline-flex; align-items: center; gap: 6px; height: 26px; padding: 0 10px; border-radius: 6px; border: 0; background: transparent; color: #8f99ad; font-size: 12px; }
.code-copy:hover { background: rgba(255, 255, 255, .07); color: #e6ebf4; }
.code-copy svg { width: 13px; height: 13px; }
.code pre { margin: 0; padding: 16px 18px; overflow-x: auto; font: 13.4px/1.7 var(--font-mono); color: var(--code-text); tab-size: 2; scrollbar-width: thin; }
.code pre code { font: inherit; background: none; padding: 0; border: 0; color: inherit; white-space: pre; }

/* highlight.js 配色（深色代码块，两个主题共用） */
.hljs-comment, .hljs-quote { color: #6d7891; font-style: italic; }
.hljs-keyword, .hljs-selector-tag, .hljs-built_in, .hljs-literal { color: #c7a2ff; }
.hljs-string, .hljs-regexp, .hljs-addition { color: #9fe0a8; }
.hljs-number, .hljs-symbol, .hljs-bullet { color: #f6c27a; }
.hljs-attr, .hljs-attribute, .hljs-property { color: #8ec8ff; }
.hljs-title, .hljs-title.function_, .hljs-section { color: #ffd88a; }
.hljs-variable, .hljs-template-variable, .hljs-params { color: #e7ecf5; }
.hljs-meta, .hljs-meta .hljs-keyword { color: #f29d8c; }
.hljs-punctuation { color: #8b96ac; }
.hljs-deletion { color: #ff9a9a; }

/* 模型目录表 */
.mt-table th:first-child { min-width: 220px; }
.mt-name { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.mt-name code, .mt-alias code { cursor: copy; }
.md .mt-name code { font-size: .9em; color: var(--text); background: var(--inline-code-bg); }
.md .mt-name code:hover, .md .mt-alias code:hover { border-color: var(--accent-line); color: var(--accent-strong); }
.mt-alias { margin-top: 6px; font-size: 12.5px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 4px 6px; align-items: center; }
.md .mt-alias code { font-size: .92em; color: var(--text-2); }
.tag { display: inline-flex; align-items: center; height: 19px; padding: 0 6px; border-radius: 5px; font-size: 11px; font-weight: 600; letter-spacing: .03em; color: var(--accent-strong); background: var(--accent-soft); }
.mt-group td { padding: 9px 16px; background: linear-gradient(90deg, var(--accent-soft), transparent 70%); color: var(--text); font: 600 12.5px/1.5 var(--font-display); letter-spacing: .05em; }
.mt-group td::before { content: ""; display: inline-block; width: 6px; height: 6px; margin: 0 10px 1px 0; border-radius: 2px; background: var(--accent); transform: rotate(45deg); }
.mt-price { white-space: nowrap; font-variant-numeric: tabular-nums; color: var(--accent-strong); font-weight: 600; }
.mt-empty { color: var(--muted); font-style: italic; }
tr.flash td { animation: flash 2.2s var(--ease); }
@keyframes flash { 0%, 40% { background: var(--accent-soft); } }

/* ------------------------------------------------------------ 模型总览页 */

.models-head { padding-block: 64px 28px; }
.models-head h1 { margin: 0; font: 700 clamp(30px, 4vw, 44px)/1.15 var(--font-display); letter-spacing: -.015em; }
.models-head p { margin: 10px 0 0; color: var(--muted); }
.models-head .eyebrow { margin: 0 0 18px; color: var(--accent); }
.filters { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 26px; }
.filter-input { flex: 1 1 320px; display: flex; align-items: center; gap: 10px; height: 44px; padding: 0 14px; border-radius: 12px; background: var(--surface); border: 1px solid var(--line-strong); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); }
.filter-input:focus-within { border-color: var(--accent-line); }
.filter-input svg { width: 17px; height: 17px; color: var(--muted); flex: none; }
.filter-input input { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; font-size: 15px; }
.seg { display: inline-flex; padding: 4px; gap: 4px; border-radius: 12px; background: var(--surface); border: 1px solid var(--line); }
.seg button { height: 34px; padding: 0 14px; border: 0; border-radius: 8px; background: transparent; color: var(--text-2); font-size: 13.5px; }
.seg button.on { background: var(--accent-soft); color: var(--accent-strong); box-shadow: inset 0 0 0 1px var(--accent-line); }
.mg { margin-top: 18px; padding: 6px 22px 10px; border-radius: 16px; }
.mg-head { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; padding: 14px 0 6px; }
.md .mg-head a { font: 650 17px/1.3 var(--font-display); color: var(--text); text-decoration: none; }
.md .mg-head a:hover { color: var(--accent-strong); }
.mg-head .chip { height: 22px; font-size: 11.5px; }
.mg-head .count { margin-left: auto; color: var(--muted); font-size: 12.5px; }
.mg .table-wrap { margin: 8px 0 12px; }
.empty { padding: 60px 0; text-align: center; color: var(--muted); }

/* ------------------------------------------------------------ 搜索面板 */

.palette { position: fixed; inset: 0; z-index: 80; display: grid; align-items: start; justify-items: center; padding: 12vh 16px 16px; background: rgba(var(--veil), .55); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); animation: fade-in .15s; }
@keyframes fade-in { from { opacity: 0; } }
.palette-box { width: min(680px, 100%); border-radius: 16px; overflow: hidden; background: var(--surface-strong); border: 1px solid var(--line-strong); box-shadow: var(--shadow); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px); }
.palette-input { display: flex; align-items: center; gap: 12px; padding: 0 18px; height: 58px; border-bottom: 1px solid var(--line); }
.palette-input svg { width: 19px; height: 19px; color: var(--accent); flex: none; }
.palette-input input { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; font-size: 16.5px; }
.palette-list { max-height: min(56vh, 520px); overflow-y: auto; padding: 8px; }
.palette-list h5 { margin: 10px 10px 6px; font: 600 11px/1 var(--font-display); letter-spacing: .16em; color: var(--faint); text-transform: uppercase; }
.pi { display: grid; grid-template-columns: 28px minmax(0, 1fr) auto; gap: 2px 10px; align-items: center; padding: 9px 10px; border-radius: 10px; cursor: pointer; }
.pi .ico { grid-row: span 2; display: grid; place-items: center; width: 28px; height: 28px; border-radius: 8px; background: var(--surface-hover); color: var(--muted); font: 600 11px/1 var(--font-mono); }
.pi b { font-weight: 600; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pi small { color: var(--muted); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pi kbd { grid-row: span 2; opacity: 0; }
.pi.on { background: var(--accent-soft); }
.pi.on .ico { color: var(--accent-strong); background: var(--accent-soft); }
.pi.on kbd { opacity: 1; }
.pi mark { background: none; color: var(--accent-strong); }
.palette-foot { display: flex; gap: 16px; padding: 10px 18px; border-top: 1px solid var(--line); color: var(--faint); font-size: 12px; }
.palette-empty { padding: 36px; text-align: center; color: var(--muted); }

/* ------------------------------------------------------------ 抽屉（移动端） */

.drawer-mask { position: fixed; inset: 0; z-index: 60; background: rgba(0, 0, 0, .45); animation: fade-in .15s; }
.drawer { position: fixed; z-index: 61; top: 0; bottom: 0; left: 0; width: min(320px, 86vw); overflow-y: auto; padding: calc(18px + env(safe-area-inset-top, 0px)) 14px 24px; background: var(--surface-strong); border-right: 1px solid var(--line-strong); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px); animation: drawer-in .22s var(--ease); }
.drawer.right { left: auto; right: 0; border-right: 0; border-left: 1px solid var(--line-strong); animation-name: drawer-in-r; }
.drawer .mobile-nav { display: grid; gap: 2px; margin-bottom: 18px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.drawer .mobile-nav a { padding: 10px 12px; border-radius: 8px; font-size: 15px; }
.drawer .mobile-nav a.active { background: var(--accent-soft); color: var(--accent-strong); }
@keyframes drawer-in { from { transform: translateX(-100%); } }
@keyframes drawer-in-r { from { transform: translateX(100%); } }

.admin-pill { position: fixed; right: 18px; bottom: calc(18px + env(safe-area-inset-bottom, 0px)); z-index: 50; display: flex; align-items: center; gap: 8px; padding: 8px 14px; border-radius: 999px; font-size: 12.5px; color: var(--accent-strong); background: var(--surface-strong); border: 1px solid var(--accent-line); box-shadow: var(--shadow); }

.skeleton { height: 14px; margin: 14px 0; border-radius: 6px; background: linear-gradient(90deg, var(--surface-hover), rgba(255, 255, 255, .09), var(--surface-hover)); background-size: 200% 100%; animation: shimmer 1.4s infinite; }
@keyframes shimmer { to { background-position: -200% 0; } }

/* ------------------------------------------------------------ 响应式 */

@media (max-width: 1280px) {
  .doc-layout { grid-template-columns: 236px minmax(0, 1fr); }
  .toc { display: none; }
}
@media (max-width: 980px) {
  .nav, .search-btn kbd, .brand small { display: none; }
  .search-btn { min-width: 0; width: 36px; padding: 0; justify-content: center; }
  .search-btn span { display: none; }
  .menu-btn { display: inline-grid; }
  .topbar-in { gap: 12px; padding: 0 16px; }
  .hero { grid-template-columns: 1fr; gap: 40px; padding-block: 56px 40px; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat:nth-child(3) { border-left: 0; }
  .stat:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .steps { grid-template-columns: 1fr; }
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .doc-layout { grid-template-columns: minmax(0, 1fr); padding: 16px 16px 0; gap: 16px; }
  .sidebar { display: none; }
  .doc-tools { display: flex; gap: 8px; margin-bottom: 12px; }
  .doc-head { padding: 24px 20px 20px; }
  .ver-banner { padding: 12px 20px; }
  .doc-body { padding: 4px 20px 32px; }
  .md .anchor { display: none; }
  .page { padding: 0 16px; }
  .notice-in { padding: 9px 16px; }
}
@media (max-width: 560px) {
  .md { font-size: 15px; }
  .md h2 { font-size: 21px; margin-top: 44px; padding-top: 24px; }
  .md th, .md td { padding: 9px 12px; }
  .card { padding: 18px; }
  .cards { grid-template-columns: minmax(0, 1fr); }
  .card.wide { grid-column: auto; }
  .card.solo { grid-template-columns: minmax(0, 1fr); }
  .pager { grid-template-columns: 1fr; }
  .pager .next { grid-column: 1; }
  .section { padding-block: 52px 4px; }
  .section-head { flex-direction: column; align-items: flex-start; }
  .footer-in .spacer { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}