/* ==========================================================
   ZDSSKAI 工作站 — 全局样式
   设计原则：克制的中性色 + 单一强调色，留白优先，细线分隔
   ========================================================== */

:root {
  --bg: #f6f5f2;
  --bg-elev: #ffffff;
  --bg-sunken: #efede8;
  --ink: #16161a;
  --ink-2: #4a4a52;
  --ink-3: #85858e;
  --line: #e2e0da;
  --line-strong: #cfccc4;
  --accent: #1d3b36;         /* 深松绿 */
  --accent-ink: #f4f1ea;
  --accent-soft: #e4ebe8;
  --gold: #a88a4f;
  --danger: #a3372f;
  --danger-soft: #f6e6e4;
  --ok: #2f6b4f;
  --ok-soft: #e3efe8;
  --warn: #8a6415;
  --warn-soft: #f5edd9;

  --radius-s: 6px;
  --radius: 10px;
  --radius-l: 16px;
  --shadow: 0 1px 2px rgba(20, 20, 25, .04), 0 8px 24px rgba(20, 20, 25, .06);
  --shadow-l: 0 2px 6px rgba(20, 20, 25, .05), 0 24px 60px rgba(20, 20, 25, .12);

  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --font-serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "STSong", Georgia, serif;
  --font-mono: "SF Mono", ui-monospace, Menlo, Consolas, monospace;

  --maxw: 1180px;
  --header-h: 64px;
  --demo-h: 32px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111113;
    --bg-elev: #18181b;
    --bg-sunken: #0c0c0e;
    --ink: #ecebe7;
    --ink-2: #b4b3ae;
    --ink-3: #7c7b77;
    --line: #28282c;
    --line-strong: #3a3a3f;
    --accent: #c9d8d2;
    --accent-ink: #10201d;
    --accent-soft: #1d2a27;
    --gold: #c7a86b;
    --danger: #e08076;
    --danger-soft: #2e1a18;
    --ok: #7fbf9b;
    --ok-soft: #16261e;
    --warn: #d6b060;
    --warn-soft: #2a2415;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .3);
    --shadow-l: 0 24px 60px rgba(0, 0, 0, .5);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3, h4 { margin: 0; font-weight: 600; letter-spacing: -.01em; line-height: 1.25; }
p { margin: 0; }
::selection { background: var(--accent); color: var(--accent-ink); }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.serif { font-family: var(--font-serif); font-weight: 500; }
.muted { color: var(--ink-3); }
.mono { font-family: var(--font-mono); font-size: .92em; }
.hide { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* ---------- 演示环境提示条 ---------- */
.demo-bar {
  height: var(--demo-h);
  display: flex; align-items: center; justify-content: center; gap: 10px;
  font-size: 12px; color: var(--ink-2);
  background: var(--bg-sunken);
  border-bottom: 1px solid var(--line);
  padding: 0 16px; white-space: nowrap; overflow: hidden;
}
.demo-bar b { color: var(--ink); font-weight: 600; }
.demo-bar .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--gold); flex: none; }
@media (max-width: 560px) { .demo-bar .long { display: none; } }

/* 模拟标签 */
.mock-tag {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 11px; font-weight: 500; line-height: 1;
  padding: 4px 7px; border-radius: 999px;
  color: var(--warn); background: var(--warn-soft);
  border: 1px solid color-mix(in srgb, var(--warn) 25%, transparent);
  vertical-align: middle; white-space: nowrap;
}
.mock-tag::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: currentColor; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  height: var(--header-h);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.site-header .container { height: 100%; display: flex; align-items: center; gap: 32px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: .02em; white-space: nowrap; }
.brand-mark {
  width: 28px; height: 28px; border-radius: 7px;
  background: var(--ink); color: var(--bg);
  display: grid; place-items: center;
  font-family: var(--font-serif); font-size: 15px; font-weight: 600;
}
.brand small { font-weight: 400; color: var(--ink-3); font-size: 12px; margin-left: 2px; }
.nav { display: flex; gap: 28px; font-size: 14px; color: var(--ink-2); }
.nav a { position: relative; transition: color .2s; }
.nav a:hover, .nav a.active { color: var(--ink); }
@media (min-width: 861px) {
  .nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 1.5px; background: var(--ink); transform: scaleX(0); transform-origin: left; transition: transform .3s cubic-bezier(.2,.8,.2,1); }
  .nav a:hover::after, .nav a.active::after { transform: scaleX(1); }
}
.site-header { transition: box-shadow .3s, background .3s; }
.site-header.scrolled { box-shadow: 0 6px 24px rgba(20, 20, 25, .06); }
.scroll-progress { position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 60; background: var(--accent); transform-origin: left; transform: scaleX(0); pointer-events: none; }
.header-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.site-header .nav-toggle { display: none; }

@media (max-width: 860px) {
  .nav {
    position: fixed; inset: calc(var(--header-h) + var(--demo-h)) 0 auto 0;
    flex-direction: column; gap: 0;
    background: var(--bg-elev); border-bottom: 1px solid var(--line);
    padding: 8px 24px 16px; box-shadow: var(--shadow);
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: .2s ease;
  }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
  .nav a:last-child { border-bottom: 0; }
  body.nav-open .nav { transform: none; opacity: 1; pointer-events: auto; }
  .site-header .nav-toggle { display: inline-grid; }
  .header-actions .btn-ghost.hide-sm { display: none; }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 38px; padding: 0 16px;
  border-radius: var(--radius-s);
  border: 1px solid transparent;
  font-size: 14px; font-weight: 500; white-space: nowrap;
  cursor: pointer; user-select: none;
  transition: background .15s, border-color .15s, color .15s, transform .05s;
}
.btn:active { transform: translateY(1px) scale(.98); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary:hover:not(:disabled) { background: color-mix(in srgb, var(--ink) 86%, var(--bg)); }
.btn-accent { background: var(--accent); color: var(--accent-ink); }
.btn-accent:hover:not(:disabled) { background: color-mix(in srgb, var(--accent) 88%, var(--ink)); }
.btn-outline { background: var(--bg-elev); border-color: var(--line-strong); color: var(--ink); }
.btn-outline:hover:not(:disabled) { border-color: var(--ink-3); }
.btn-ghost { background: transparent; color: var(--ink-2); }
.btn-ghost:hover:not(:disabled) { color: var(--ink); background: var(--bg-sunken); }
.btn-danger { background: var(--bg-elev); color: var(--danger); border-color: color-mix(in srgb, var(--danger) 35%, transparent); }
.btn-danger:hover:not(:disabled) { background: var(--danger-soft); }
.btn-lg { height: 46px; padding: 0 22px; font-size: 15px; }
.btn-sm { height: 30px; padding: 0 11px; font-size: 13px; }
.btn-block { width: 100%; }
.icon-btn {
  display: inline-grid; place-items: center;
  width: 36px; height: 36px; border-radius: var(--radius-s);
  border: 1px solid transparent; background: transparent; cursor: pointer; color: var(--ink-2);
}
.icon-btn:hover { background: var(--bg-sunken); color: var(--ink); }
.icon { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- 表单 ---------- */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field label { font-size: 13px; color: var(--ink-2); font-weight: 500; }
.field .hint { font-size: 12px; color: var(--ink-3); }
.input, .select, .textarea {
  width: 100%; height: 40px; padding: 0 12px;
  border: 1px solid var(--line-strong); border-radius: var(--radius-s);
  background: var(--bg-elev); outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.textarea { height: auto; min-height: 88px; padding: 10px 12px; resize: vertical; line-height: 1.55; }
.select { appearance: none; -webkit-appearance: none; padding-right: 32px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2385858e' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 12px center; }
.input:focus, .select:focus, .textarea:focus { border-color: var(--ink-2); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ink) 8%, transparent); }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 560px) { .row { grid-template-columns: 1fr; } }

.switch { position: relative; display: inline-flex; align-items: center; gap: 10px; cursor: pointer; font-size: 14px; }
.switch input { position: absolute; opacity: 0; }
.switch .track { width: 34px; height: 20px; border-radius: 999px; background: var(--line-strong); position: relative; transition: .2s; flex: none; }
.switch .track::after { content: ""; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: #fff; transition: .2s; box-shadow: 0 1px 2px rgba(0,0,0,.2); }
.switch input:checked + .track { background: var(--accent); }
.switch input:checked + .track::after { transform: translateX(14px); }
.switch input:focus-visible + .track { outline: 2px solid var(--ink-3); outline-offset: 2px; }

/* ---------- 通用卡片/徽标 ---------- */
.card { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); }
.badge { display: inline-flex; align-items: center; font-size: 12px; padding: 2px 8px; border-radius: 999px; background: var(--bg-sunken); color: var(--ink-2); border: 1px solid var(--line); white-space: nowrap; }
.badge-ok { background: var(--ok-soft); color: var(--ok); border-color: transparent; }
.badge-danger { background: var(--danger-soft); color: var(--danger); border-color: transparent; }
.badge-warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.badge-accent { background: var(--accent-soft); color: var(--accent); border-color: transparent; }

/* ---------- 弹窗 ---------- */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(15, 15, 18, .42);
  display: flex; align-items: center; justify-content: center; padding: 20px;
  opacity: 0; transition: opacity .18s ease;
}
.modal-backdrop.show { opacity: 1; }
.modal {
  width: 100%; max-width: 440px; max-height: calc(100vh - 40px); overflow: auto;
  background: var(--bg-elev); border: 1px solid var(--line);
  border-radius: var(--radius-l); box-shadow: var(--shadow-l);
  transform: translateY(8px) scale(.99); transition: transform .2s ease;
}
.modal.wide { max-width: 620px; }
.modal-backdrop.show .modal { transform: none; }
.modal-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; padding: 22px 24px 4px; }
.modal-head h3 { font-size: 18px; }
.modal-head p { font-size: 13px; color: var(--ink-3); margin-top: 4px; }
.modal-body { padding: 16px 24px 8px; }
.modal-foot { display: flex; justify-content: flex-end; gap: 10px; padding: 12px 24px 22px; flex-wrap: wrap; }
@media (max-width: 560px) {
  .modal-backdrop { align-items: flex-end; padding: 0; }
  .modal { max-width: none !important; border-radius: var(--radius-l) var(--radius-l) 0 0; max-height: 92vh; }
  .modal-foot .btn { flex: 1; }
}

.tabs { display: flex; gap: 4px; padding: 4px; background: var(--bg-sunken); border-radius: var(--radius-s); margin-bottom: 18px; }
.tabs button { flex: 1; height: 32px; border: 0; background: transparent; border-radius: 5px; cursor: pointer; font-size: 14px; color: var(--ink-2); }
.tabs button.active { background: var(--bg-elev); color: var(--ink); box-shadow: 0 1px 2px rgba(0,0,0,.06); }

.notice {
  display: flex; gap: 10px; align-items: flex-start;
  font-size: 13px; color: var(--ink-2);
  padding: 10px 12px; border-radius: var(--radius-s);
  background: var(--warn-soft); border: 1px solid color-mix(in srgb, var(--warn) 20%, transparent);
}
.notice.plain { background: var(--bg-sunken); border-color: var(--line); }

/* ---------- Toast ---------- */
.toast-wrap { position: fixed; z-index: 200; left: 50%; top: 48px; transform: translateX(-50%); display: flex; flex-direction: column; gap: 8px; align-items: center; pointer-events: none; }
.toast {
  pointer-events: auto;
  background: var(--ink); color: var(--bg);
  font-size: 13px; padding: 10px 16px; border-radius: 12px;
  box-shadow: var(--shadow-l);
  animation: toastIn .22s ease;
  max-width: calc(100vw - 32px);
}
.toast.error { background: var(--danger); color: #fff; }
@keyframes toastIn { from { opacity: 0; transform: translateY(-6px); } }

/* ==========================================================
   首页
   ========================================================== */
.hero { padding: 88px 0 64px; position: relative; overflow: hidden; isolation: isolate; }
.hero-inner { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.hero-copy { min-width: 0; }
.hero .eyebrow { display: inline-flex; align-items: center; gap: 10px; font-size: 13px; color: var(--ink-2); padding: 5px 12px 5px 6px; border: 1px solid var(--line); border-radius: 999px; background: var(--bg-elev); }
.hero .eyebrow span:first-child { background: var(--accent); color: var(--accent-ink); font-size: 11px; padding: 2px 8px; border-radius: 999px; }
.hero h1 { font-family: var(--font-serif); font-weight: 500; font-size: clamp(36px, 6vw, 64px); line-height: 1.12; letter-spacing: -.02em; margin: 28px 0 22px; max-width: 14em; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero .lead { font-size: clamp(15px, 1.6vw, 18px); color: var(--ink-2); max-width: 36em; }
.hero .cta { display: flex; gap: 12px; margin-top: 36px; flex-wrap: wrap; }
.btn .arrow { width: 16px; height: 16px; transition: transform .25s cubic-bezier(.2,.8,.2,1); }
.btn:hover .arrow { transform: translateX(3px); }
.hero-meta { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 16px; padding-top: 28px; border-top: 1px solid var(--line); }
.hero-meta div b { display: block; font-family: var(--font-serif); font-size: 28px; font-weight: 500; }
.hero-meta div span { font-size: 13px; color: var(--ink-3); }
.hero-grid {
  position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 60% 70% at 85% 30%, #000 10%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 60% 70% at 85% 30%, #000 10%, transparent 70%);
  opacity: .7;
  animation: gridDrift 30s linear infinite;
}
@keyframes gridDrift { to { background-position: 64px 64px, 64px 64px; } }
.hero-orb { position: absolute; z-index: -1; border-radius: 50%; filter: blur(60px); pointer-events: none; opacity: .55; }
.hero-orb.a { width: 420px; height: 420px; right: -60px; top: 40px; background: color-mix(in srgb, var(--accent) 22%, transparent); animation: orbFloat 14s ease-in-out infinite; }
.hero-orb.b { width: 300px; height: 300px; right: 30%; bottom: -80px; background: color-mix(in srgb, var(--gold) 20%, transparent); animation: orbFloat 18s ease-in-out infinite reverse; }
@keyframes orbFloat { 50% { transform: translate(-40px, 30px) scale(1.08); } }

/* Hero 入场 */
.hero-in { opacity: 0; transform: translateY(18px); animation: heroIn .8s cubic-bezier(.2,.8,.2,1) forwards; animation-delay: calc(var(--d, 0) * 110ms + 80ms); }
@keyframes heroIn { to { opacity: 1; transform: none; } }

/* Hero 视觉：对话卡片 */
.hero-visual { position: relative; padding: 24px 12px; }
.hv-card { position: relative; background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius-l); box-shadow: var(--shadow-l); overflow: hidden; animation: cardFloat 7s ease-in-out infinite; }
@keyframes cardFloat { 50% { transform: translateY(-8px); } }
.hv-top { display: flex; align-items: center; justify-content: space-between; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.hv-models { position: relative; display: flex; padding: 3px; background: var(--bg-sunken); border-radius: 8px; font-size: 12px; }
.hv-models span { position: relative; z-index: 1; padding: 4px 12px; color: var(--ink-3); transition: color .3s; }
.hv-models span.active { color: var(--ink); }
.hv-pill { position: absolute; top: 3px; bottom: 3px; left: 3px; width: 0; background: var(--bg-elev); border-radius: 6px; box-shadow: 0 1px 2px rgba(0,0,0,.08); transition: transform .45s cubic-bezier(.3,1.3,.5,1), width .45s cubic-bezier(.3,1.3,.5,1); }
.hv-live { display: inline-flex; align-items: center; gap: 6px; font-size: 11px; color: var(--ok); }
.hv-live i { width: 6px; height: 6px; border-radius: 50%; background: currentColor; animation: livePulse 1.8s ease-out infinite; }
@keyframes livePulse { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--ok) 60%, transparent); } 100% { box-shadow: 0 0 0 8px transparent; } }
.hv-body { padding: 20px 18px 8px; min-height: 216px; display: grid; gap: 16px; align-content: start; }
.hv-q { justify-self: end; max-width: 82%; background: var(--ink); color: var(--bg); padding: 10px 14px; border-radius: 12px 12px 4px 12px; font-size: 13.5px; animation: msgIn .45s cubic-bezier(.2,.8,.2,1); }
.hv-a { display: grid; grid-template-columns: 26px 1fr; gap: 10px; font-size: 13.5px; color: var(--ink-2); line-height: 1.75; }
.hv-av { width: 26px; height: 26px; border-radius: 7px; background: var(--ink); color: var(--bg); display: grid; place-items: center; font-family: var(--font-serif); font-size: 13px; }
.hv-a p:not(:empty)::after { content: "▍"; color: var(--ink-3); animation: blink 1s steps(1) infinite; margin-left: 1px; }
.hv-a p.done::after { content: none; }
.hv-input { margin: 8px 14px 14px; display: flex; align-items: center; justify-content: space-between; border: 1px solid var(--line-strong); border-radius: 10px; padding: 6px 6px 6px 12px; font-size: 13px; color: var(--ink-3); }
.hv-input b { width: 28px; height: 28px; border-radius: 7px; background: var(--ink); color: var(--bg); display: grid; place-items: center; }
.hv-input b .icon { width: 15px; height: 15px; }
.hv-chip { position: absolute; display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; font-size: 12px; background: var(--bg-elev); border: 1px solid var(--line); border-radius: 999px; box-shadow: var(--shadow); color: var(--ink-2); white-space: nowrap; }
.hv-chip .icon { width: 14px; height: 14px; color: var(--accent); }
.hv-chip.c1 { left: -14px; top: 54%; animation: chipFloat 6s ease-in-out infinite; }
.hv-chip.c2 { right: -6px; top: 4px; animation: chipFloat 7s ease-in-out -2s infinite; }
@keyframes chipFloat { 50% { transform: translateY(-10px); } }
@keyframes msgIn { from { opacity: 0; transform: translateY(8px) scale(.98); } to { opacity: 1; transform: none; } }

@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero-visual { max-width: 520px; }
  .hero-meta { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .hero { padding: 56px 0 48px; }
  .hv-chip.c1 { left: 0; }
  .hv-chip.c2 { right: 0; }
}

.section { padding: 96px 0; border-top: 1px solid var(--line); scroll-margin-top: var(--header-h); }
@media (max-width: 560px) { .section { padding: 64px 0; } }
.section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: 44px; flex-wrap: wrap; }
.section-head .kicker { font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--gold); margin-bottom: 12px; font-weight: 500; }
.section-head h2 { font-family: var(--font-serif); font-weight: 500; font-size: clamp(26px, 3.4vw, 38px); }
.section-head p { color: var(--ink-2); max-width: 30em; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature { position: relative; padding: 28px 26px 30px; border: 1px solid var(--line); border-radius: var(--radius-l); background: var(--bg-elev); overflow: hidden; transition: transform .35s cubic-bezier(.2,.8,.2,1), box-shadow .35s, border-color .35s; }
.feature::before { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity .35s;
  background: radial-gradient(240px circle at var(--mx, 50%) var(--my, 0%), color-mix(in srgb, var(--accent) 10%, transparent), transparent 70%); }
.feature:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--line-strong); }
.feature:hover::before { opacity: 1; }
.feature-top { display: flex; align-items: center; justify-content: space-between; }
.f-icon { width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); transition: transform .4s cubic-bezier(.3,1.4,.5,1), background .3s, color .3s; }
.feature:hover .f-icon { transform: rotate(-8deg) scale(1.08); background: var(--accent); color: var(--accent-ink); }
.feature .num { font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); }
.feature h3 { font-size: 17px; margin: 20px 0 8px; }
.feature p { color: var(--ink-2); font-size: 14px; }
@media (max-width: 860px) { .features { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .features { grid-template-columns: 1fr; } }

/* 预览窗口 */
.preview { border: 1px solid var(--line); border-radius: var(--radius-l); background: var(--bg-elev); box-shadow: var(--shadow); overflow: hidden; }
.preview-body { min-height: 300px; }
.preview-top { display: flex; align-items: center; gap: 6px; padding: 12px 16px; border-bottom: 1px solid var(--line); }
.preview-top i { width: 10px; height: 10px; border-radius: 50%; background: var(--line-strong); }
.preview-top span { margin-left: 10px; font-size: 12px; color: var(--ink-3); font-family: var(--font-mono); }
.preview-body { padding: 28px; display: grid; gap: 18px; }
.pv-msg { max-width: 80%; padding: 12px 16px; border-radius: 12px; font-size: 14px; }
.pv-msg.user { margin-left: auto; background: var(--ink); color: var(--bg); border-bottom-right-radius: 4px; }
.pv-msg.ai { background: var(--bg-sunken); border-bottom-left-radius: 4px; }
.pv-meta { font-size: 11px; color: var(--ink-3); margin-top: 6px; font-family: var(--font-mono); }
.pv-msg.ai { display: grid; gap: 4px; }
.pv-msg.ai .l1 { margin-bottom: 8px; }
.pv-line { display: block; }
.pv-ai-wrap { position: relative; }
.pv-thinking { display: none; position: absolute; top: 4px; left: 0; padding: 12px 16px; background: var(--bg-sunken); border-radius: 12px 12px 12px 4px; }
/* 进入视口后依次播放 */
.js .preview .s1, .js .preview .pv-msg.ai, .js .preview .pv-line, .js .preview .pv-thinking { opacity: 0; }
.preview.in .s1 { animation: msgIn .5s .2s cubic-bezier(.2,.8,.2,1) both; }
.js .pv-thinking { display: inline-flex; }
.preview.in .pv-thinking { animation: fadeInOut 1.1s .7s both; }
.preview.in .pv-msg.ai { animation: msgIn .45s 1.7s cubic-bezier(.2,.8,.2,1) both; }
.preview.in .pv-line { animation: lineIn .45s ease both; }
.preview.in .l1 { animation-delay: 1.85s; }
.preview.in .l2 { animation-delay: 2.2s; }
.preview.in .l3 { animation-delay: 2.5s; }
.preview.in .l4 { animation-delay: 2.8s; }
.preview.in .l5 { animation-delay: 3.2s; }
@keyframes lineIn { from { opacity: 0; transform: translateX(-6px); filter: blur(2px); } to { opacity: 1; transform: none; filter: none; } }
@keyframes fadeInOut { 0% { opacity: 0; } 15%, 85% { opacity: 1; } 100% { opacity: 0; } }

.split { display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px; align-items: center; }
.split ul { list-style: none; padding: 0; margin: 24px -16px 0; display: grid; gap: 4px; }
.split li:hover { background: var(--bg-elev); }
.split li { padding: 14px 16px; border-radius: var(--radius); transition: background .25s; display: grid; grid-template-columns: 22px 1fr; gap: 12px; color: var(--ink-2); font-size: 14px; }
.split li b { color: var(--ink); display: block; font-weight: 600; margin-bottom: 2px; }
.split li svg { margin-top: 3px; color: var(--accent); }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; gap: 40px; } }

/* 套餐 */
.billing-toggle { position: relative; display: inline-flex; padding: 4px; border: 1px solid var(--line); border-radius: 999px; background: var(--bg-elev); }
.billing-toggle button { position: relative; z-index: 1; transition: color .3s; border: 0; background: transparent; height: 32px; padding: 0 16px; border-radius: 999px; font-size: 13px; cursor: pointer; color: var(--ink-2); }
.billing-toggle button.active { color: var(--bg); }
.bt-pill { position: absolute; top: 4px; bottom: 4px; left: 0; width: 0; border-radius: 999px; background: var(--ink); transition: transform .45s cubic-bezier(.3,1.3,.5,1), width .45s cubic-bezier(.3,1.3,.5,1); }
.billing-toggle:not(.ready) button.active { background: var(--ink); }
.billing-toggle .save { font-size: 11px; color: var(--gold); margin-left: 4px; }
.billing-toggle button.active .save { color: inherit; opacity: .8; }

.plans { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.plan { position: relative; display: flex; flex-direction: column; padding: 28px 24px; background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius-l); transition: border-color .3s, box-shadow .3s, transform .35s cubic-bezier(.2,.8,.2,1); }
.plan:hover { border-color: var(--line-strong); transform: translateY(-6px); box-shadow: var(--shadow-l); }
.plan.featured { border-color: var(--ink); box-shadow: var(--shadow); background: linear-gradient(180deg, color-mix(in srgb, var(--accent-soft) 70%, var(--bg-elev)), var(--bg-elev) 45%); }
.plan .price b { display: inline-block; }
.plan .price b.flip { animation: priceFlip .45s cubic-bezier(.2,.8,.2,1); }
@keyframes priceFlip { from { opacity: 0; transform: translateY(-10px); filter: blur(3px); } }
.plan.current { border-color: var(--accent); }
.plan .ribbon { position: absolute; top: -11px; left: 24px; animation: ribbonPop .6s .3s cubic-bezier(.3,1.5,.5,1) both; font-size: 11px; padding: 3px 10px; background: var(--ink); color: var(--bg); border-radius: 999px; letter-spacing: .04em; }
.plan h3 { font-size: 16px; }
.plan .desc { font-size: 13px; color: var(--ink-3); margin-top: 6px; min-height: 42px; }
.plan .price { margin: 22px 0 4px; display: flex; align-items: baseline; gap: 4px; }
.plan .price b { font-family: var(--font-serif); font-size: 38px; font-weight: 500; letter-spacing: -.02em; }
.plan .price span { color: var(--ink-3); font-size: 13px; }
.plan .price-note { font-size: 12px; color: var(--ink-3); min-height: 18px; }
.plan .btn { margin: 22px 0; }
.plan ul { list-style: none; padding: 20px 0 0; margin: 0; border-top: 1px solid var(--line); display: grid; gap: 10px; font-size: 13px; color: var(--ink-2); }
.plan li { display: grid; grid-template-columns: 16px 1fr; gap: 10px; }
.plan li svg { width: 14px; height: 14px; margin-top: 4px; color: var(--accent); }
@keyframes ribbonPop { from { opacity: 0; transform: translateY(6px) scale(.8); } }
@media (max-width: 1024px) { .plans { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .plans { grid-template-columns: 1fr; } }

/* 对比表 */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-elev); -webkit-overflow-scrolling: touch; }
table.table { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 640px; }
.table th, .table td { text-align: left; padding: 13px 18px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.table thead th { font-size: 12px; font-weight: 500; color: var(--ink-3); background: var(--bg-sunken); white-space: nowrap; }
.table tbody tr:last-child td { border-bottom: 0; }
.table tbody tr:hover td { background: color-mix(in srgb, var(--bg-sunken) 50%, transparent); }
.table .group td { font-size: 12px; font-weight: 600; letter-spacing: .06em; color: var(--ink-3); background: var(--bg); }
.compare td:not(:first-child), .compare th:not(:first-child) { text-align: center; }
.yes { color: var(--accent); font-weight: 600; }
.no { color: var(--ink-3); }

/* FAQ */
.faq { display: grid; grid-template-columns: 1fr 1fr; gap: 0 48px; }
.faq details { border-bottom: 1px solid var(--line); padding: 20px 0; }
.faq summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 16px; font-weight: 500; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--ink-3); font-size: 20px; line-height: 1; transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin-top: 12px; color: var(--ink-2); font-size: 14px; }
.faq details[open] p { animation: faqOpen .35s cubic-bezier(.2,.8,.2,1); }
.faq summary { transition: color .2s; }
.faq summary:hover { color: var(--accent); }
@keyframes faqOpen { from { opacity: 0; transform: translateY(-6px); } }
@media (max-width: 860px) { .faq { grid-template-columns: 1fr; } }

.cta-band { position: relative; overflow: hidden; isolation: isolate; padding: 88px 0; text-align: center; background: var(--ink); color: var(--bg); }
.cta-glow { position: absolute; z-index: -1; inset: -50%; pointer-events: none;
  background: conic-gradient(from 0deg, transparent, color-mix(in srgb, var(--gold) 22%, transparent), transparent 30%, color-mix(in srgb, var(--accent-soft) 18%, transparent), transparent 60%);
  animation: spin 24s linear infinite; filter: blur(40px); opacity: .7; }
@keyframes spin { to { transform: rotate(1turn); } }
.cta-band h2 { font-family: var(--font-serif); font-weight: 500; font-size: clamp(26px, 3.4vw, 40px); }
.cta-band p { opacity: .7; margin: 14px 0 30px; }
.cta-band .btn-primary { background: var(--bg); color: var(--ink); }
.cta-band .btn-outline { background: transparent; color: var(--bg); border-color: color-mix(in srgb, var(--bg) 35%, transparent); }

.site-footer { padding: 48px 0 40px; font-size: 13px; color: var(--ink-3); }
.site-footer .container { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.site-footer nav { display: flex; gap: 20px; flex-wrap: wrap; }
.site-footer a:hover { color: var(--ink); }

/* 结算 */
.summary { border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 16px; font-size: 14px; }
.summary .line { display: flex; justify-content: space-between; padding: 4px 0; color: var(--ink-2); }
.summary .line.total { border-top: 1px solid var(--line); margin-top: 8px; padding-top: 12px; color: var(--ink); font-weight: 600; }
.pay-methods { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 14px; }
.pay-methods label { border: 1px solid var(--line-strong); border-radius: var(--radius-s); padding: 10px; text-align: center; font-size: 13px; cursor: pointer; }
.pay-methods input { display: none; }
.pay-methods input:checked + span { font-weight: 600; }
.pay-methods label:has(input:checked) { border-color: var(--ink); background: var(--bg-sunken); }

/* ==========================================================
   对话页
   ========================================================== */
body.app { height: 100vh; height: 100dvh; overflow: hidden; display: flex; flex-direction: column; }
.chat-shell { flex: 1; min-height: 0; display: grid; grid-template-columns: 272px 1fr; }
.side-mask { display: none; }
.chat-side { border-right: 1px solid var(--line); background: var(--bg-sunken); display: flex; flex-direction: column; min-height: 0; }
.chat-side-head { padding: 14px; display: flex; gap: 8px; align-items: center; border-bottom: 1px solid var(--line); }
.chat-side-head .brand { flex: 1; min-width: 0; }
.chat-side .new-chat { margin: 14px 14px 6px; }
.conv-list { flex: 1; overflow-y: auto; padding: 6px 8px 12px; }
.conv-group { font-size: 11px; color: var(--ink-3); padding: 14px 10px 6px; letter-spacing: .06em; }
.conv-item { display: flex; align-items: center; gap: 8px; padding: 9px 10px; border-radius: var(--radius-s); cursor: pointer; font-size: 14px; color: var(--ink-2); }
.conv-item:hover { background: color-mix(in srgb, var(--ink) 5%, transparent); color: var(--ink); }
.conv-item.active { background: var(--bg-elev); color: var(--ink); box-shadow: 0 0 0 1px var(--line); }
.conv-item .t { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.conv-item .del { opacity: 0; width: 26px; height: 26px; }
.conv-item:hover .del, .conv-item.active .del { opacity: 1; }
@media (hover: none) { .conv-item .del { opacity: 1; } }
.conv-empty { padding: 24px 12px; font-size: 13px; color: var(--ink-3); text-align: center; }
.account { border-top: 1px solid var(--line); padding: 12px 14px; display: flex; align-items: center; gap: 10px; }
.avatar { width: 34px; height: 34px; border-radius: 50%; background: var(--ink); color: var(--bg); display: grid; place-items: center; font-size: 13px; font-weight: 600; flex: none; }
.avatar.guest { background: var(--line-strong); color: var(--ink-2); }
.account .who { flex: 1; min-width: 0; line-height: 1.35; }
.account .who b { display: block; font-size: 14px; font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.account .who span { font-size: 12px; color: var(--ink-3); }

.chat-main { display: flex; flex-direction: column; min-width: 0; min-height: 0; background: var(--bg); }
.chat-top { height: 56px; flex: none; display: flex; align-items: center; gap: 10px; padding: 0 16px; border-bottom: 1px solid var(--line); }
.chat-top .title { font-weight: 500; font-size: 15px; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-top .spacer { flex: 1; }
.model-select { height: 34px; width: auto; max-width: 240px; font-size: 13px; }
.chat-top .menu-btn { display: none; }

.quota { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--ink-3); white-space: nowrap; }
.quota .bar { width: 64px; height: 4px; background: var(--line); border-radius: 99px; overflow: hidden; }
.quota .bar i { display: block; height: 100%; background: var(--accent); }

.messages { flex: 1; overflow-y: auto; scroll-behavior: smooth; }
.messages-inner { max-width: 780px; margin: 0 auto; padding: 28px 20px 12px; }
.msg { display: grid; grid-template-columns: 32px 1fr; gap: 14px; padding: 16px 0; }
.msg .av { width: 32px; height: 32px; border-radius: 8px; display: grid; place-items: center; font-size: 12px; font-weight: 600; }
.msg.user .av { background: var(--bg-sunken); border: 1px solid var(--line); color: var(--ink-2); }
.msg.assistant .av { background: var(--ink); color: var(--bg); font-family: var(--font-serif); }
.msg .role { font-size: 13px; font-weight: 600; margin-bottom: 4px; display: flex; align-items: center; gap: 8px; }
.msg .body { font-size: 15px; line-height: 1.75; overflow-wrap: anywhere; }
.msg .body > *:first-child { margin-top: 0; }
.msg .body p { margin: 0 0 .8em; }
.msg .body p:last-child { margin-bottom: 0; }
.msg .body h3, .msg .body h4 { font-size: 15px; margin: 1.1em 0 .5em; }
.msg .body ul, .msg .body ol { padding-left: 1.4em; margin: .3em 0 .9em; }
.msg .body li { margin: .25em 0; }
.msg .body code { font-family: var(--font-mono); font-size: .88em; background: var(--bg-sunken); border: 1px solid var(--line); padding: 1px 5px; border-radius: 4px; }
.msg .body pre { background: var(--bg-sunken); border: 1px solid var(--line); border-radius: var(--radius-s); padding: 14px 16px; overflow-x: auto; margin: .6em 0 1em; }
.msg .body pre code { background: none; border: 0; padding: 0; font-size: 13px; line-height: 1.6; }
.msg .body blockquote { margin: .6em 0; padding: 2px 14px; border-left: 2px solid var(--line-strong); color: var(--ink-2); }
.msg .meta { margin-top: 10px; font-size: 12px; color: var(--ink-3); display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.msg .meta button { border: 0; background: none; color: var(--ink-3); cursor: pointer; padding: 0; font-size: 12px; }
.msg .meta button:hover { color: var(--ink); }
.msg.error .body { color: var(--danger); }
.cursor::after { content: "▍"; animation: blink 1s steps(1) infinite; color: var(--ink-3); margin-left: 1px; }
@keyframes blink { 50% { opacity: 0; } }
.thinking { display: inline-flex; gap: 4px; padding: 8px 0; }
.thinking i { width: 6px; height: 6px; border-radius: 50%; background: var(--ink-3); animation: pulse 1.2s infinite ease-in-out; }
.thinking i:nth-child(2) { animation-delay: .15s; }
.thinking i:nth-child(3) { animation-delay: .3s; }
@keyframes pulse { 0%, 80%, 100% { opacity: .25; transform: scale(.85); } 40% { opacity: 1; transform: none; } }

.welcome { max-width: 680px; margin: 0 auto; padding: 10vh 20px 20px; text-align: center; }
.welcome h1 { font-family: var(--font-serif); font-weight: 500; font-size: clamp(26px, 4vw, 36px); }
.welcome p { color: var(--ink-2); margin-top: 10px; }
.suggestions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 36px; text-align: left; }
.suggestion { padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-elev); cursor: pointer; font-size: 14px; transition: border-color .15s; }
.suggestion:hover { border-color: var(--ink-3); }
.suggestion b { display: block; font-weight: 500; margin-bottom: 2px; }
.suggestion span { font-size: 13px; color: var(--ink-3); }
@media (max-width: 560px) { .suggestions { grid-template-columns: 1fr; } .welcome { padding-top: 5vh; } }

.composer-wrap { flex: none; padding: 8px 20px calc(14px + env(safe-area-inset-bottom)); }
.composer { max-width: 780px; margin: 0 auto; border: 1px solid var(--line-strong); border-radius: 14px; background: var(--bg-elev); box-shadow: var(--shadow); transition: border-color .15s; }
.composer:focus-within { border-color: var(--ink-3); }
.composer textarea { display: block; width: 100%; border: 0; outline: none; background: transparent; resize: none; padding: 14px 16px 4px; min-height: 52px; max-height: 220px; line-height: 1.6; font-size: 15px; }
.composer-bar { display: flex; align-items: center; gap: 8px; padding: 6px 8px 8px 14px; }
.composer-bar .info { font-size: 12px; color: var(--ink-3); flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.send-btn { width: 36px; height: 36px; border-radius: 9px; border: 0; background: var(--ink); color: var(--bg); display: grid; place-items: center; cursor: pointer; flex: none; }
.send-btn:disabled { background: var(--line-strong); cursor: not-allowed; }
.composer-note { max-width: 780px; margin: 8px auto 0; text-align: center; font-size: 12px; color: var(--ink-3); }

.locked { max-width: 780px; margin: 0 auto; border: 1px solid var(--line-strong); border-radius: 14px; background: var(--bg-elev); padding: 18px 20px; display: flex; gap: 16px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.locked b { display: block; font-weight: 600; }
.locked span { font-size: 13px; color: var(--ink-3); }
.locked .btns { display: flex; gap: 8px; }

/* 入口（登录/游客） */
.gate { position: fixed; inset: 0; z-index: 90; background: var(--bg); display: grid; grid-template-columns: 1fr 1fr; }
.gate-art { background: var(--ink); color: var(--bg); padding: 48px; display: flex; flex-direction: column; justify-content: space-between; position: relative; overflow: hidden; }
.gate-art .brand-mark { background: var(--bg); color: var(--ink); }
.gate-art h2 { font-family: var(--font-serif); font-weight: 500; font-size: clamp(28px, 3.2vw, 42px); line-height: 1.25; max-width: 12em; }
.gate-art p { opacity: .6; font-size: 14px; margin-top: 16px; max-width: 28em; }
.gate-art .lines { position: absolute; right: -80px; top: -80px; width: 420px; height: 420px; border-radius: 50%; border: 1px solid color-mix(in srgb, var(--bg) 14%, transparent); box-shadow: 0 0 0 60px color-mix(in srgb, var(--bg) 3%, transparent), 0 0 0 120px color-mix(in srgb, var(--bg) 2%, transparent); }
.gate-form { display: flex; align-items: center; justify-content: center; padding: 40px 24px; overflow-y: auto; }
.gate-card { width: 100%; max-width: 380px; }
.gate-card h1 { font-size: 22px; }
.gate-card > p { color: var(--ink-3); font-size: 14px; margin: 6px 0 24px; }
.divider { display: flex; align-items: center; gap: 12px; font-size: 12px; color: var(--ink-3); margin: 20px 0; }
.divider::before, .divider::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.guest-box { border: 1px dashed var(--line-strong); border-radius: var(--radius); padding: 16px; }
.guest-box .top { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 12px; }
.guest-box b { font-weight: 600; font-size: 14px; }
.guest-box p { font-size: 13px; color: var(--ink-3); margin-bottom: 12px; }
.gate-back { position: absolute; top: 20px; right: 20px; }

@media (max-width: 860px) {
  .gate { grid-template-columns: 1fr; grid-template-rows: auto 1fr; overflow-y: auto; }
  .gate-art { padding: 28px 24px; }
  .gate-art .hide-sm { display: none; }
  .gate-art h2 { font-size: 24px; margin-top: 24px; }
  .gate-form { align-items: flex-start; padding-top: 32px; }
}

@media (max-width: 860px) {
  .chat-shell { grid-template-columns: 1fr; }
  .chat-side {
    position: fixed; z-index: 80; top: var(--demo-h); bottom: 0; left: 0; width: min(300px, 86vw);
    transform: translateX(-100%); transition: transform .22s ease; box-shadow: var(--shadow-l);
  }
  body.side-open .chat-side { transform: none; }
  .side-mask { display: block; position: fixed; inset: 0; z-index: 79; background: rgba(0,0,0,.35); opacity: 0; pointer-events: none; transition: .2s; }
  body.side-open .side-mask { opacity: 1; pointer-events: auto; }
  .chat-top .menu-btn { display: inline-grid; }
  .chat-top { padding: 0 8px; }
  .model-select { max-width: 150px; }
  .quota .bar { display: none; }
}
@media (max-width: 480px) {
  .quota { display: none; }
  .model-select { max-width: 170px; }
  .messages-inner { padding: 16px 16px 8px; }
  .msg { grid-template-columns: 1fr; gap: 6px; }
  .msg .av { display: none; }
  .composer-wrap { padding: 6px 10px calc(10px + env(safe-area-inset-bottom)); }
}

/* ==========================================================
   后台
   ========================================================== */
.admin-shell { display: grid; grid-template-columns: 232px 1fr; min-height: calc(100vh - var(--demo-h)); }
.admin-side { border-right: 1px solid var(--line); background: var(--bg-sunken); padding: 18px 12px; display: flex; flex-direction: column; gap: 4px; position: sticky; top: 0; height: calc(100vh - var(--demo-h)); }
.admin-side .brand { padding: 4px 8px 20px; }
.admin-nav a { display: flex; align-items: center; gap: 10px; padding: 9px 10px; border-radius: var(--radius-s); font-size: 14px; color: var(--ink-2); cursor: pointer; }
.admin-nav a:hover { color: var(--ink); background: color-mix(in srgb, var(--ink) 5%, transparent); }
.admin-nav a.active { background: var(--bg-elev); color: var(--ink); box-shadow: 0 0 0 1px var(--line); }
.admin-nav a .count { margin-left: auto; font-size: 11px; color: var(--ink-3); }
.admin-side .foot { margin-top: auto; padding: 12px 8px 0; border-top: 1px solid var(--line); font-size: 12px; color: var(--ink-3); display: grid; gap: 8px; }
.admin-main { min-width: 0; }
.admin-top { height: 60px; display: flex; align-items: center; gap: 12px; padding: 0 32px; border-bottom: 1px solid var(--line); background: var(--bg); position: sticky; top: 0; z-index: 20; }
.admin-top h1 { font-size: 17px; white-space: nowrap; }
.admin-top .logout-sm { display: none; }
@media (max-width: 860px) { .admin-top .logout-sm { display: inline-grid; } .admin-top .mock-tag { display: none; } }
.admin-top .spacer { flex: 1; }
.admin-content { padding: 28px 32px 60px; max-width: 1200px; }
.panel { margin-bottom: 24px; }
.panel-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.panel-head h2 { font-size: 15px; }
.panel-head p { font-size: 13px; color: var(--ink-3); margin-top: 2px; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 24px; }
.stat { padding: 18px 20px; }
.stat span { font-size: 12px; color: var(--ink-3); }
.stat b { display: block; font-family: var(--font-serif); font-size: 30px; font-weight: 500; margin-top: 6px; line-height: 1.1; }
.stat small { font-size: 12px; color: var(--ink-3); }
.spark { display: flex; align-items: flex-end; gap: 6px; height: 160px; padding: 20px 20px 0; }
.spark div { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 6px; height: 100%; justify-content: flex-end; }
.spark i { display: block; width: 100%; max-width: 36px; background: var(--accent); border-radius: 4px 4px 0 0; min-height: 2px; transition: opacity .15s; }
.spark div:hover i { opacity: .75; }
.spark .spark-v { font-style: normal; font-size: 11px; color: var(--ink-2); font-variant-numeric: tabular-nums; min-height: 1em; }
.spark span { font-size: 11px; color: var(--ink-3); padding-bottom: 12px; }

.api-list { display: grid; gap: 12px; }
.api-card { padding: 18px 20px; display: grid; grid-template-columns: 1fr auto; gap: 14px 20px; align-items: center; }
.api-card .name { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; font-weight: 600; }
.api-card .kv { display: flex; gap: 6px 22px; flex-wrap: wrap; font-size: 13px; color: var(--ink-2); margin-top: 8px; }
.api-card .kv span { color: var(--ink-3); margin-right: 6px; }
.api-card .ops { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.api-card.disabled { opacity: .62; }
.empty { padding: 48px 20px; text-align: center; color: var(--ink-3); font-size: 14px; }
.empty b { display: block; color: var(--ink); font-size: 15px; margin-bottom: 6px; }

.admin-login { min-height: calc(100vh - var(--demo-h)); display: grid; place-items: center; padding: 24px; }
.admin-login .card { width: 100%; max-width: 380px; padding: 32px 28px; }

@media (max-width: 1024px) { .stats { grid-template-columns: 1fr 1fr; } }
@media (max-width: 860px) {
  .admin-shell { grid-template-columns: 1fr; }
  .admin-side { position: static; height: auto; flex-direction: row; align-items: center; padding: 10px 12px; overflow-x: auto; gap: 4px; border-right: 0; border-bottom: 1px solid var(--line); }
  .admin-side .brand { padding: 0 10px 0 4px; }
  .admin-side .brand small, .admin-side .foot { display: none; }
  .admin-nav { display: flex; gap: 4px; }
  .admin-nav a { white-space: nowrap; }
  .admin-nav a .count { display: none; }
  .admin-top { padding: 0 16px; position: static; }
  .admin-content { padding: 20px 16px 48px; }
  .api-card { grid-template-columns: 1fr; }
  .api-card .ops { justify-content: flex-start; }
}

/* ==========================================================
   滚动显现
   ========================================================== */
.js [data-reveal=""] { opacity: 0; transform: translateY(24px); transition: opacity .8s cubic-bezier(.2,.8,.2,1), transform .8s cubic-bezier(.2,.8,.2,1); }
.js [data-reveal="play"] { opacity: 0; transform: translateY(24px) scale(.98); transition: opacity .8s cubic-bezier(.2,.8,.2,1), transform .8s cubic-bezier(.2,.8,.2,1); }
.js [data-reveal="stagger"] > * { opacity: 0; transform: translateY(24px); transition: opacity .7s cubic-bezier(.2,.8,.2,1), transform .7s cubic-bezier(.2,.8,.2,1), box-shadow .35s, border-color .35s, background .25s; transition-delay: calc(var(--i, 0) * 80ms); }
.js [data-reveal].in, .js [data-reveal="stagger"].in > * { opacity: 1; transform: none; }
.js [data-reveal="stagger"].in > *:hover { transition-delay: 0s; }
.js [data-reveal="stagger"].in > .plan:hover, .js [data-reveal="stagger"].in > .feature:hover { transform: translateY(-5px); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; animation-delay: 0s !important; transition-duration: .01ms !important; transition-delay: 0s !important; }
  html { scroll-behavior: auto; }
}