/* ============================================================
   Skill 译站官网 · 浅色玻璃拟态(与应用 public/style.css 同源令牌)
   - 零 CDN / 零构建;独立令牌,不跨目录 @import
   - 断点:1079(特性 3→2)/ 899(单列、演示阅读器上下堆叠)/ 639(导航收纳)
   ============================================================ */

/* ---------- 令牌(浅色) ---------- */
:root {
  color-scheme: light;

  --bg: #e9eef6;
  --bg-deep: #dfe6f2;
  --card: rgba(255, 255, 255, 0.66);
  --card-hover: rgba(255, 255, 255, 0.85);
  --card-solid: #ffffff;
  --input-bg: rgba(255, 255, 255, 0.95);

  --ink: #17233a;
  --ink-2: #52607a;
  --ink-3: #8a94a8;

  --line: rgba(148, 163, 184, 0.25);
  --line-soft: rgba(148, 163, 184, 0.16);
  --line-strong: rgba(148, 163, 184, 0.4);

  --accent: #2563eb;
  --accent-ink: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, 0.1);
  --accent-glow: rgba(37, 99, 235, 0.3);

  --violet: #7c3aed;
  --green: #059669;
  --amber: #d97706;
  --cyan: #0891b2;
  --rose: #e11d48;

  --radius: 14px;
  --radius-pop: 16px;
  --shadow:
    0 1px 2px rgba(23, 35, 58, 0.08),
    0 8px 28px rgba(23, 35, 58, 0.08);
  --shadow-pop:
    0 2px 6px rgba(23, 35, 58, 0.1),
    0 18px 48px rgba(23, 35, 58, 0.14);

  --font-ui: "Segoe UI Variable Text", "Segoe UI", "Microsoft YaHei UI",
    "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: Consolas, "Cascadia Mono", "Courier New", monospace;

  --w-content: 1080px;
}

/* ---------- 基础 ---------- */
* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.75 var(--font-ui);
  -webkit-font-smoothing: antialiased;
}

/* 环境光:固定视口三层冷色光晕,玻璃面在其上被"冻"住 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(900px 520px at 12% -8%, rgba(59, 130, 246, 0.14), transparent 62%),
    radial-gradient(760px 480px at 96% 12%, rgba(99, 102, 241, 0.1), transparent 60%),
    radial-gradient(820px 560px at 55% 112%, rgba(34, 197, 94, 0.06), transparent 62%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
}

::selection { background: var(--accent-glow); }

h1, h2, h3, h4 { color: var(--ink); line-height: 1.35; }
h2 { font-size: clamp(24px, 3vw, 31px); font-weight: 700; margin: 6px 0 10px; letter-spacing: -0.3px; }
h3 { font-size: 16.5px; font-weight: 700; margin: 0 0 6px; }
p { margin: 0 0 8px; }

a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  background: rgba(23, 35, 58, 0.07);
  border-radius: 4px;
  padding: 0.08em 0.4em;
  font-family: var(--font-mono);
  font-size: 0.92em;
  color: var(--ink);
}

img { max-width: 100%; }

/* 显式 display 的元素也能被 hidden 属性隐藏(阅读器/空态依赖) */
[hidden] { display: none !important; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 200;
  padding: 8px 16px;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  font-size: 13px;
  transition: top 0.15s;
}
.skip-link:focus { top: 12px; text-decoration: none; }

.wrap { max-width: var(--w-content); margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: 760px; }

/* 锚点落点避开吸顶导航 */
section[id] { scroll-margin-top: 84px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink);
  font: 600 14px var(--font-ui);
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease, color 0.12s ease,
    transform 0.12s ease, box-shadow 0.12s ease;
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  backdrop-filter: blur(12px) saturate(140%);
}
.btn:hover {
  border-color: var(--line-strong);
  background: var(--card-hover);
  text-decoration: none;
}
.btn:active { transform: translateY(1px); }
.btn-lg { padding: 11px 26px; font-size: 15px; }
.btn-primary {
  background: var(--accent);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 2px 14px var(--accent-glow);
}
.btn-primary:hover {
  background: var(--accent);
  color: #fff;
  filter: brightness(1.08);
  box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-ghost {
  border-color: var(--line);
  background: transparent;
  color: var(--ink-2);
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.6); color: var(--accent-ink); }

/* ---------- 0. 导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(233, 238, 246, 0.72);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  backdrop-filter: blur(20px) saturate(140%);
  border-bottom: 1px solid var(--line-soft);
}
.nav-inner {
  max-width: var(--w-content);
  margin: 0 auto;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand-logo { display: block; width: 28px; height: 28px; border-radius: 8px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-name { font-size: 16px; font-weight: 700; letter-spacing: 0.2px; }
.brand-sub { font-size: 11px; color: var(--ink-3); }

.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a {
  padding: 6px 13px;
  border-radius: 999px;
  color: var(--ink-2);
  font-size: 13.5px;
  transition: color 0.12s, background 0.12s;
}
.nav-links a:hover { color: var(--accent-ink); text-decoration: none; background: rgba(255, 255, 255, 0.65); }
.nav-links a.on { color: var(--accent-ink); background: var(--accent-soft); font-weight: 600; }

.nav-actions { display: flex; align-items: center; gap: 10px; }
.nav-actions .btn { padding: 7px 16px; font-size: 13.5px; }
.nav-gh {
  display: inline-flex;
  padding: 7px;
  border-radius: 10px;
  color: var(--ink-2);
  transition: color 0.12s, background 0.12s;
}
.nav-gh:hover { color: var(--ink); background: rgba(255, 255, 255, 0.75); }

/* ---------- 1. Hero ---------- */
.hero { padding: 72px 0 26px; text-align: center; }

.hero-badge {
  display: inline-block;
  padding: 5px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink-2);
  font-size: 12.5px;
  letter-spacing: 0.3px;
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  backdrop-filter: blur(12px) saturate(140%);
}

.hero-title {
  font-size: clamp(30px, 4.6vw, 46px);
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.25;
  margin: 20px 0 14px;
}
.grad {
  background: linear-gradient(92deg, var(--accent) 20%, var(--violet) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  max-width: 720px;
  margin: 0 auto 26px;
  color: var(--ink-2);
  font-size: 16px;
}

.hero-cta { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; margin-bottom: 26px; }

.hero-trust {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  list-style: none;
  margin: 0 0 44px;
  padding: 0;
}
.hero-trust li {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid var(--line-soft);
  color: var(--ink-2);
  font-size: 12.5px;
}

/* ---------- 界面模拟图 ---------- */
.mock-wrap { max-width: 920px; }
.mock {
  border: 1px solid var(--line);
  border-radius: var(--radius-pop);
  background: rgba(255, 255, 255, 0.7);
  box-shadow: var(--shadow-pop);
  overflow: hidden;
  text-align: left;
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  backdrop-filter: blur(20px) saturate(140%);
}

.mock-chrome {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, 0.45);
}
.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot-r { background: #ff5f57; }
.dot-y { background: #febc2e; }
.dot-g { background: #28c840; }
.mock-logo { border-radius: 4px; margin-left: 6px; }
.mock-title { margin-left: 4px; font-size: 12.5px; color: var(--ink-2); }

/* ---------- 界面演示(样式裁剪移植自 public/style.css,demo- 前缀) ---------- */
.demo-main { position: relative; display: flex; flex-direction: column; height: 580px; }

.demo-toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line-soft);
}
.demo-search {
  flex: 0 1 240px;
  min-width: 0;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--input-bg);
  color: var(--ink);
  font: 12.5px var(--font-ui);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.demo-search::placeholder { color: var(--ink-3); }
.demo-search:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.demo-stats { margin-left: auto; color: var(--ink-3); font: 11px var(--font-mono); white-space: nowrap; }

.demo-chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  padding: 9px 14px 10px;
  border-bottom: 1px solid var(--line-soft);
}
.demo-chip {
  padding: 3px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink-2);
  font: 12px var(--font-ui);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  transition: border-color 0.12s, color 0.12s, background 0.12s;
}
.demo-chip:hover { border-color: var(--line-strong); color: var(--accent-ink); }
.demo-chip small { opacity: 0.65; margin-left: 3px; }
.demo-chip.on {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
}
.demo-chip:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.demo-groups { flex: 1; min-height: 0; overflow-y: auto; padding: 12px 14px 16px; }
.demo-group + .demo-group { margin-top: 16px; }
.demo-group-head {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
  cursor: pointer;
  padding: 2px 2px 4px;
  user-select: none;
}
.demo-caret { font-size: 10px; color: var(--ink-3); transition: transform 0.15s; }
.demo-group.closed .demo-caret { transform: rotate(-90deg); }
.demo-group-title { font: 700 13px var(--font-mono); color: var(--ink); }
.demo-gh { font-size: 11px; color: var(--accent-ink); }
.demo-gh:hover { text-decoration: underline; }
.demo-group-count { color: var(--ink-3); font-size: 11px; }
.demo-group-desc { flex-basis: 100%; margin: 2px 0 0; color: var(--ink-3); font-size: 11.5px; line-height: 1.6; }
.demo-group.closed .demo-group-body { display: none; }

.demo-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 10px;
}
.demo-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.72);
  padding: 11px 13px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  transition: border-color 0.12s, background 0.12s, box-shadow 0.12s;
}
.demo-card:hover,
.demo-card:focus-visible {
  border-color: var(--line-strong);
  background: var(--card-hover);
  box-shadow: var(--shadow);
}
.demo-card-title { display: flex; align-items: baseline; gap: 8px; min-width: 0; }
.demo-card-name {
  font: 700 13px var(--font-mono);
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.demo-badges { display: flex; flex-wrap: wrap; gap: 4px; }
.demo-badge {
  font-size: 10.5px;
  padding: 1px 7px;
  border-radius: 999px;
  border: 1px solid transparent;
  white-space: nowrap;
}
/* 根目录徽章:按工具品牌上特征色(配色与 public/style.css 同源) */
.demo-root { --tool: var(--accent); background: color-mix(in srgb, var(--tool) 15%, transparent); color: color-mix(in srgb, var(--tool) 72%, var(--ink)); }
.demo-root.linked { background: transparent; border-color: color-mix(in srgb, var(--tool) 60%, transparent); }
.demo-root-claude { --tool: #d97757; }
.demo-root-zcode { --tool: #7a4fe0; }
.demo-root-auto0 { --tool: #ef5350; }
.demo-root-auto1 { --tool: #f59e0b; }
.demo-root-auto2 { --tool: #eab308; }
.demo-root-auto3 { --tool: #84cc16; }
.demo-root-auto4 { --tool: #0ea5e9; }
.demo-root-auto5 { --tool: #a855f7; }
.demo-root-auto6 { --tool: #f472b6; }
.demo-root-auto7 { --tool: #a1887f; }
.demo-root-auto8 { --tool: #64748b; }
.demo-root-auto9 { --tool: #00bcd4; }
.demo-copy { background: rgba(148, 163, 184, 0.16); color: var(--ink-2); }
.demo-zh { background: rgba(5, 150, 105, 0.1); color: var(--green); }
.demo-ok { background: rgba(5, 150, 105, 0.1); color: var(--green); }
.demo-violet { background: rgba(124, 58, 237, 0.1); color: var(--violet); }

.demo-card-summary { font-size: 12px; color: var(--ink); line-height: 1.6; }
.demo-card-summary.seed::after { content: " 种子"; font-size: 10px; color: var(--green); }
.demo-card-summary.llm::after { content: " LLM"; font-size: 10px; color: var(--violet); }
.demo-card-cats { display: flex; flex-wrap: wrap; gap: 4px; }
.demo-cat-tag {
  font-size: 10.5px;
  background: rgba(148, 163, 184, 0.14);
  border: 1px solid var(--line);
  color: var(--ink-2);
  padding: 1px 7px;
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.demo-cat-tag:hover { color: var(--accent-ink); border-color: var(--accent); }
.demo-card-desc {
  color: var(--ink-3);
  font-size: 11.5px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.demo-empty {
  margin: 0;
  text-align: center;
  padding: 40px 0;
  color: var(--ink-3);
  font-size: 12.5px;
}

/* 对照阅读器:绝对定位在演示窗口内,不遮宣传页其他内容 */
.demo-reader {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: flex;
  flex-direction: column;
  background: rgba(255, 255, 255, 0.96);
}
.demo-reader-top {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line-soft);
}
.demo-back {
  padding: 4px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  color: var(--ink-2);
  font: 600 12px var(--font-ui);
  cursor: pointer;
  transition: border-color 0.12s, color 0.12s;
}
.demo-back:hover { color: var(--accent-ink); border-color: var(--accent); }
.demo-reader-title { display: flex; align-items: baseline; gap: 8px; min-width: 0; overflow: hidden; }
.demo-reader-title strong { font: 700 13px var(--font-mono); color: var(--ink); white-space: nowrap; }
.demo-path {
  color: var(--ink-3);
  font: 11px var(--font-mono);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.demo-meta { margin-left: auto; display: flex; gap: 5px; }
.demo-view { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.demo-bilingual-head {
  flex: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 14px;
  padding: 6px 14px;
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-2);
  border-bottom: 1px solid var(--line-soft);
}
.demo-bilingual { flex: 1; overflow-y: auto; padding: 8px 14px 20px; }
.demo-brow {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 14px;
  border-bottom: 1px dashed var(--line-soft);
  padding: 8px 0;
}
.demo-brow.demo-full { grid-template-columns: 1fr; }
.demo-b-src { color: var(--ink); }
.demo-b-dst { color: var(--ink); background: rgba(37, 99, 235, 0.05); border-radius: 6px; padding: 0 8px; }
.demo-b-src h1, .demo-b-src h2, .demo-b-src h3, .demo-b-src h4 { color: var(--ink); }
.demo-b-dst h1, .demo-b-dst h2, .demo-b-dst h3, .demo-b-dst h4 { color: var(--accent-ink); }
.demo-empty-note { color: var(--ink-3); font-style: italic; }

/* markdown 渲染(自 public/style.css 的 .md 裁剪,字号适配演示窗口) */
.demo-md { font-size: 12px; line-height: 1.65; }
.demo-md h1 { font-size: 1.35em; margin: 0.5em 0 0.35em; }
.demo-md h2 { font-size: 1.2em; margin: 0.5em 0 0.35em; }
.demo-md h3 { font-size: 1.1em; margin: 0.5em 0 0.3em; }
.demo-md h4, .demo-md h5, .demo-md h6 { font-size: 1em; margin: 0.4em 0 0.25em; }
.demo-md p { margin: 0.35em 0; }
.demo-md ul, .demo-md ol { margin: 0.35em 0; padding-left: 1.5em; }
.demo-md li { margin: 0.15em 0; }
.demo-md blockquote {
  margin: 0.4em 0;
  padding: 2px 12px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 6px 6px 0;
  color: var(--ink-2);
}
.demo-md table { border-collapse: collapse; margin: 0.5em 0; font-size: 0.95em; }
.demo-md th, .demo-md td { border: 1px solid var(--line); padding: 4px 10px; text-align: left; }
.demo-md th { background: rgba(148, 163, 184, 0.14); }
.demo-md hr { border: none; border-top: 1px solid var(--line); margin: 0.8em 0; }
.demo-md a { color: var(--accent-ink); }
.demo-md pre {
  background: #10141f;
  color: #dfe5f0;
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 8px;
  padding: 12px 14px;
  overflow-x: auto;
  margin: 0.5em 0;
  position: relative;
}
.demo-md pre code { background: transparent; color: inherit; padding: 0; font-size: 12px; }
/* 代码块悬停复制 */
.demo-code-copy {
  position: absolute;
  top: 6px;
  right: 6px;
  padding: 2px 10px;
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 6px;
  background: rgba(15, 23, 42, 0.85);
  color: #cbd5e1;
  font: 11px var(--font-ui);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s;
}
.demo-md pre:hover .demo-code-copy, .demo-code-copy:focus-visible { opacity: 1; }
.demo-code-copy:hover { border-color: var(--accent); color: #fff; }

.mock-demo {
  margin-left: auto;
  padding: 1px 9px;
  border: 1px solid rgba(124, 58, 237, 0.35);
  border-radius: 999px;
  background: rgba(139, 92, 246, 0.12);
  color: var(--violet);
  font-size: 10.5px;
  white-space: nowrap;
}

.mock-status {
  padding: 8px 14px;
  border-top: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, 0.45);
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 11px;
}

/* ---------- 区块骨架 ---------- */
.sec { padding: 74px 0; }
.sec-alt { position: relative; }
.sec-alt::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.32);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  z-index: -1;
}

.kicker {
  margin: 0;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2.5px;
}
.lead { color: var(--ink-2); max-width: 680px; margin-bottom: 30px; }

/* ---------- 卡片 ---------- */
.grid { display: grid; gap: 14px; }
.grid > * { min-width: 0; } /* 代码块等长内容不撑破 1fr 轨道,卡内自行滚动 */
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  box-shadow: var(--shadow);
  transition: background 0.12s ease, border-color 0.12s ease, transform 0.12s ease, box-shadow 0.12s ease;
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  backdrop-filter: blur(12px) saturate(140%);
}
.card:hover {
  background: var(--card-hover);
  border-color: var(--line-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-pop);
}
.card > p:last-child { margin-bottom: 0; }
.card p { color: var(--ink-2); font-size: 13.5px; }

.card-emoji { font-size: 24px; line-height: 1; margin-bottom: 10px; }
.card .fix { margin-top: auto; }
.card .fix b { color: var(--accent-ink); margin-right: 6px; }
.grid-3 .card, .grid-4 .card { display: flex; flex-direction: column; }

/* 特性卡图标(彩色玻璃圆角片) */
.fico {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  border: 1px solid transparent;
  margin-bottom: 10px;
}
.fico svg { width: 20px; height: 20px; }
.fico-blue { background: rgba(37, 99, 235, 0.1); color: var(--accent); }
.fico-violet { background: rgba(124, 58, 237, 0.1); color: var(--violet); }
.fico-green { background: rgba(5, 150, 105, 0.1); color: var(--green); }
.fico-amber { background: rgba(217, 119, 6, 0.12); color: var(--amber); }
.fico-cyan { background: rgba(8, 145, 178, 0.1); color: var(--cyan); }
.fico-rose { background: rgba(225, 29, 72, 0.08); color: var(--rose); }

.new {
  display: inline-block;
  vertical-align: 2px;
  margin-left: 6px;
  padding: 1px 8px;
  border-radius: 999px;
  background: rgba(124, 58, 237, 0.1);
  border: 1px solid rgba(124, 58, 237, 0.3);
  color: var(--violet);
  font-size: 10.5px;
  font-weight: 600;
}

/* ---------- 兼容 ---------- */
.roots {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0 28px;
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
}
.roots li {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--line-soft);
  padding: 12px 2px;
}
.roots li:hover .root-name { color: var(--accent-ink); }
.root-ico {
  display: flex;
  height: 30px;
  width: 30px;
  flex: none;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--card);
  color: var(--ink-3);
}
.root-ico img { display: block; height: 20px; width: 20px; object-fit: contain; }
.root-meta { min-width: 0; }
.root-name {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--ink);
  font-size: 14.5px;
  font-weight: 600;
  transition: color 0.12s;
}
.root-path {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 11.5px;
}

/* 默认收起:只展示前 12 个(桌面 3 列 × 4 行);JS 加载后生效,无 JS 时全量展示 */
.roots.collapsed li:nth-child(n + 13) { display: none; }
.roots-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 2px 0 18px;
  padding: 7px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink-2);
  font: 600 13px var(--font-ui);
  cursor: pointer;
  transition: border-color 0.12s, color 0.12s, background 0.12s;
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  backdrop-filter: blur(12px) saturate(140%);
}
.roots-toggle:hover { border-color: var(--accent); color: var(--accent-ink); background: var(--card-hover); }
.roots-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.roots-toggle::after { content: "▾"; font-size: 11px; color: var(--ink-3); transition: transform 0.15s; }
.roots-toggle[aria-expanded="true"]::after { transform: rotate(180deg); }

.note {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--ink-2);
  font-size: 13px;
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  backdrop-filter: blur(12px) saturate(140%);
}
.note p { margin: 0; }
.note .ico { font-size: 16px; line-height: 1.5; }

/* ---------- FAQ ---------- */
.faq { display: flex; flex-direction: column; gap: 10px; }
.faq details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  backdrop-filter: blur(12px) saturate(140%);
  transition: border-color 0.12s, background 0.12s;
}
.faq details:hover { background: var(--card-hover); }
.faq details[open] { border-color: var(--line-strong); }
.faq summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 15px 18px;
  font-weight: 600;
  font-size: 14.5px;
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--accent-ink); }
.faq-x {
  margin-left: auto;
  position: relative;
  width: 12px;
  height: 12px;
  flex: none;
  transition: transform 0.15s ease;
}
.faq-x::before, .faq-x::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 12px;
  height: 2px;
  border-radius: 1px;
  background: var(--ink-3);
}
.faq-x::before { transform: translateY(-50%); }
.faq-x::after { transform: translateY(-50%) rotate(90deg); }
.faq details[open] .faq-x { transform: rotate(45deg); }
.faq details[open] .faq-x::before, .faq details[open] .faq-x::after { background: var(--accent); }
.faq details > p { padding: 0 18px 15px; margin: 0; color: var(--ink-2); font-size: 13.5px; }

/* ---------- 下载 ---------- */
.dl-card { display: flex; flex-direction: column; gap: 10px; }
.dl-list { margin: 0; padding-left: 18px; color: var(--ink-2); font-size: 13.5px; }
.dl-list li { margin: 3px 0; }
.dl-card .btn { align-self: flex-start; margin-top: auto; }

.warn {
  margin: 0;
  padding: 10px 14px;
  border: 1px solid rgba(217, 119, 6, 0.4);
  border-radius: 10px;
  background: rgba(245, 158, 11, 0.12);
  color: #92400e;
  font-size: 12.5px;
}

.code-block { position: relative; }
.code-block pre {
  margin: 0;
  padding: 14px 16px;
  border-radius: var(--radius);
  background: #10141f;
  border: 1px solid rgba(148, 163, 184, 0.16);
  overflow-x: auto;
}
.code-block code {
  background: transparent;
  padding: 0;
  color: #dfe5f0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
}
.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 4px 12px;
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 7px;
  background: rgba(15, 23, 42, 0.85);
  color: #cbd5e1;
  font: 12px var(--font-ui);
  cursor: pointer;
  transition: border-color 0.12s, color 0.12s;
}
.copy-btn:hover { border-color: var(--accent); color: #fff; }
.copy-btn.copied { border-color: #34d399; color: #34d399; }

.dl-hint { color: var(--ink-2); font-size: 13.5px; margin: 0; }

/* ---------- 页脚 ---------- */
.footer { margin-top: 30px; border-top: 1px solid var(--line-soft); }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 30px;
  padding: 44px 24px 36px;
}
.footer-brand p { margin: 10px 0 0; color: var(--ink-2); font-size: 13px; max-width: 260px; }
.footer nav { display: flex; flex-direction: column; gap: 7px; }
.footer nav h4 { margin: 0 0 4px; font-size: 12.5px; color: var(--ink-3); letter-spacing: 1px; }
.footer nav a { color: var(--ink-2); font-size: 13.5px; }
.footer nav a:hover { color: var(--accent-ink); }
.footer-bar {
  padding: 14px 24px;
  border-top: 1px solid var(--line-soft);
  text-align: center;
  color: var(--ink-3);
  font-size: 12.5px;
}

/* ---------- 响应式 ---------- */
/* 900–1079:特性 3→2、副标隐藏 */
@media (max-width: 1079px) {
  .brand-sub { display: none; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .roots { grid-template-columns: repeat(2, 1fr); }
}

/* 640–899:全单列,演示窗口内卡片单列、阅读器上下堆叠 */
@media (max-width: 899px) {
  .hero { padding-top: 52px; }
  .sec { padding: 56px 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .demo-main { height: 560px; }
  .demo-cards { grid-template-columns: 1fr; }
  .demo-bilingual-head { display: none; }
  .demo-brow { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* <640:导航收成 logo+下载,锚点横向滚动 */
@media (max-width: 639px) {
  .nav-inner { flex-wrap: wrap; gap: 8px; padding: 8px 16px; }
  .nav-links {
    order: 3;
    width: 100%;
    margin-left: 0;
    overflow-x: auto;
    flex-wrap: nowrap;
    scrollbar-width: none;
    padding-bottom: 2px;
  }
  .nav-links::-webkit-scrollbar { display: none; }
  .nav-links a { white-space: nowrap; flex: none; }
  .nav-actions { margin-left: auto; }
  .nav-gh { display: none; }
  .wrap { padding: 0 16px; }
  .hero-cta .btn { width: 100%; justify-content: center; }
  .roots { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 22px; }
}

/* ---------- 降级与无障碍 ---------- */
@supports not ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  .nav { background: var(--card-solid); }
  .card, .mock, .roots li, .note, .hero-badge, .hero-trust li, .faq details,
  .btn:not(.btn-ghost), .demo-chip, .demo-card, .demo-back {
    background: var(--card-solid);
  }
  .demo-reader { background: var(--card-solid); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .card:hover, .btn:active { transform: none; }
}