/* ==========================================================================
   JitWord 文件预览 SDK 官网 · 黑白高级风格 + 毛玻璃
   ========================================================================== */

:root {
  --bg: #060607;
  --bg-soft: #0c0c0f;
  --ink: #f5f5f7;
  --ink-2: #a9a9b2;
  --ink-3: #6c6c76;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --glass: rgba(255, 255, 255, 0.04);
  --glass-2: rgba(255, 255, 255, 0.07);
  --glass-border: rgba(255, 255, 255, 0.1);
  --mono: "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", -apple-system, sans-serif;
  --radius: 16px;
  --radius-sm: 10px;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  color: var(--ink);
  background: var(--bg);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* 背景氛围光：纯黑白灰层次 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(52% 38% at 50% -6%, rgba(255, 255, 255, 0.09), transparent 70%),
    radial-gradient(36% 26% at 88% 12%, rgba(255, 255, 255, 0.05), transparent 70%),
    radial-gradient(40% 30% at 8% 82%, rgba(255, 255, 255, 0.04), transparent 70%),
    var(--bg);
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
::selection { background: rgba(255, 255, 255, 0.22); }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ==========================================================================
   顶栏（毛玻璃）
   ========================================================================== */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 90;
  border-bottom: 1px solid var(--line);
  background: rgba(6, 6, 7, 0.62);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  backdrop-filter: blur(18px) saturate(150%);
}

.topbar-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
  height: 62px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand-mark {
  width: 30px; height: 30px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: linear-gradient(145deg, rgba(255,255,255,0.14), rgba(255,255,255,0.02));
  font-size: 12px;
  font-weight: 800;
}

.brand-tag {
  color: var(--ink-3);
  font-size: 12px;
  font-weight: 400;
  border-left: 1px solid var(--line);
  padding-left: 10px;
}

.main-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }

.main-nav a {
  padding: 7px 13px;
  border-radius: 8px;
  color: var(--ink-2);
  font-size: 14px;
  transition: color 120ms ease, background 120ms ease;
}

.main-nav a:hover { color: var(--ink); background: rgba(255, 255, 255, 0.06); }
.main-nav a.active { color: var(--ink); background: rgba(255, 255, 255, 0.09); }

/* 顶栏右上角转化入口：Word 协同编辑 */
.topbar-cta {
  display: inline-flex;
  align-items: center;
  margin-left: 14px;
  padding: 8px 16px;
  border-radius: 9px;
  background: linear-gradient(135deg, #165dff, #4d8dff);
  color: #fff;
  font-size: 13.5px;
  font-weight: 600;
  white-space: nowrap;
  box-shadow: 0 4px 16px rgba(22, 93, 255, 0.35);
  transition: filter 120ms ease, transform 120ms ease;
}
.topbar-cta:hover { filter: brightness(1.1); transform: translateY(-1px); }
.topbar-cta svg { width: 12px; height: 12px; margin-left: 6px; }

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 40px; height: 40px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--glass);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 17px; height: 1.6px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 200ms ease, opacity 200ms ease;
}

body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(6.6px) rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-6.6px) rotate(-45deg); }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero { padding: 148px 0 84px; text-align: center; position: relative; overflow: hidden; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 15px;
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  background: var(--glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  color: var(--ink-2);
  font-size: 13px;
  margin-bottom: 26px;
}

.hero-badge i {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.9);
}

.hero h1 {
  font-size: clamp(34px, 6vw, 60px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.hero h1 .grad {
  background: linear-gradient(120deg, #ffffff 20%, #9a9aa5 80%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  max-width: 640px;
  margin: 22px auto 0;
  color: var(--ink-2);
  font-size: clamp(15px, 2vw, 17px);
}

.hero-actions { display: flex; gap: 14px; justify-content: center; margin-top: 36px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 11px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 130ms ease, background 130ms ease, border-color 130ms ease;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  color: #0a0a0b;
  background: #f5f5f7;
}

.btn-primary:hover { background: #ffffff; }

.btn-ghost {
  color: var(--ink);
  border-color: var(--line-strong);
  background: var(--glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.btn-ghost:hover { background: var(--glass-2); border-color: rgba(255, 255, 255, 0.28); }

/* Hero 代码卡片 */
.hero-code {
  max-width: 780px;
  margin: 56px auto 0;
  text-align: left;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  background: rgba(12, 12, 16, 0.6);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

/* 统计条 */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: 72px auto 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  overflow: hidden;
  max-width: 920px;
}

.stat {
  padding: 26px 16px;
  background: rgba(10, 10, 13, 0.85);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  text-align: center;
}

.stat b { display: block; font-size: 28px; font-weight: 800; letter-spacing: -0.01em; }
.stat span { color: var(--ink-3); font-size: 13px; }

/* ==========================================================================
   通用 section
   ========================================================================== */
.section { padding: 88px 0; }
.section-head { text-align: center; max-width: 620px; margin: 0 auto 52px; }

.section-head .kicker {
  display: inline-block;
  color: var(--ink-3);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.section-head h2 { font-size: clamp(26px, 4vw, 36px); font-weight: 800; letter-spacing: -0.01em; }
.section-head p { color: var(--ink-2); margin-top: 14px; }

/* 毛玻璃卡片 */
.glass-card {
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  background: var(--glass);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  padding: 28px;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.glass-card:hover {
  border-color: rgba(255, 255, 255, 0.22);
  background: var(--glass-2);
  transform: translateY(-3px);
}

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }

.feature-icon {
  width: 44px; height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: linear-gradient(145deg, rgba(255,255,255,0.12), rgba(255,255,255,0.02));
  margin-bottom: 18px;
  font-size: 19px;
}

.glass-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.glass-card p { color: var(--ink-2); font-size: 14px; }

/* 格式徽标 */
.format-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 34px; }

.format-chip {
  padding: 10px 22px;
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  background: var(--glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink-2);
}

/* 价值板块 */
.value-item { display: flex; gap: 22px; padding: 30px 0; border-bottom: 1px solid var(--line); }
.value-item:last-child { border-bottom: none; }
.value-num {
  font-family: var(--mono);
  font-size: 15px;
  color: var(--ink-3);
  padding-top: 4px;
  flex: 0 0 46px;
}
.value-item h3 { font-size: 19px; font-weight: 700; margin-bottom: 8px; }
.value-item p { color: var(--ink-2); font-size: 14.5px; max-width: 720px; }

/* 在线演示：单按钮 CTA */
.demo-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 26px;
  padding: 64px 24px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  background: rgba(12, 12, 16, 0.6);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.55);
  text-align: center;
}

.demo-cta-scenes {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.demo-cta-scenes span {
  padding: 7px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink-2);
  font-size: 13px;
  background: rgba(255, 255, 255, 0.04);
}

.btn-lg { padding: 15px 44px; font-size: 16.5px; border-radius: 13px; }

.demo-note { color: var(--ink-3); font-size: 13px; text-align: center; }

/* CTA */
.cta-panel {
  text-align: center;
  padding: 68px 32px;
  border: 1px solid var(--glass-border);
  border-radius: 22px;
  background:
    radial-gradient(60% 90% at 50% -10%, rgba(255, 255, 255, 0.1), transparent 65%),
    var(--glass);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.cta-panel h2 { font-size: clamp(24px, 4vw, 34px); font-weight: 800; }
.cta-panel p { color: var(--ink-2); margin: 14px 0 30px; }

/* 页脚 */
.footer { border-top: 1px solid var(--line); padding: 44px 0 54px; margin-top: 40px; }
.footer-inner { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.footer .brand { font-size: 15px; }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-links a { color: var(--ink-3); font-size: 13.5px; }
.footer-links a:hover { color: var(--ink); }
.footer-copy { width: 100%; color: var(--ink-3); font-size: 12.5px; margin-top: 26px; }

/* ==========================================================================
   代码块
   ========================================================================== */
.code-block {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #0b0b0e;
  overflow: hidden;
}

.code-block pre {
  padding: 18px 20px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.75;
  color: #d8d8de;
}

.code-block .c { color: #6a6a74; }
.code-block .k { color: #ffffff; font-weight: 600; }
.code-block .s { color: #b9b9c2; }

.copy-btn {
  position: absolute;
  top: 10px; right: 10px;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--ink-3);
  font-size: 12px;
  cursor: pointer;
  transition: color 120ms ease, border-color 120ms ease;
}

.copy-btn:hover { color: var(--ink); border-color: var(--line-strong); }

/* ==========================================================================
   文档页布局（docs / api）
   ========================================================================== */
.doc-layout {
  display: grid;
  grid-template-columns: 228px minmax(0, 1fr);
  gap: 48px;
  padding-top: 108px;
  padding-bottom: 80px;
}

.doc-side { position: sticky; top: 86px; align-self: start; max-height: calc(100vh - 110px); overflow-y: auto; }

.doc-side .side-title {
  color: var(--ink-3);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 0 12px;
  margin: 18px 0 8px;
}

.doc-side .side-title:first-child { margin-top: 0; }

.doc-side a {
  display: block;
  padding: 6px 12px;
  border-radius: 7px;
  color: var(--ink-2);
  font-size: 13.5px;
  border-left: 2px solid transparent;
}

.doc-side a:hover { color: var(--ink); background: rgba(255, 255, 255, 0.05); }
.doc-side a.active { color: var(--ink); background: rgba(255, 255, 255, 0.07); border-left-color: #fff; }

.doc-body { min-width: 0; }

.doc-body h1 { font-size: 30px; font-weight: 800; letter-spacing: -0.01em; }
.doc-body .lead { color: var(--ink-2); margin: 14px 0 8px; }

.doc-body h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 60px 0 18px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 86px;
}

.doc-body h2:first-of-type { border-top: none; padding-top: 0; margin-top: 34px; }

.doc-body h3 { font-size: 16.5px; font-weight: 700; margin: 30px 0 12px; scroll-margin-top: 86px; }
.doc-body p { color: var(--ink-2); margin: 10px 0; font-size: 14.5px; }
.doc-body p strong, .doc-body li strong { color: var(--ink); }
.doc-body ul, .doc-body ol { padding-left: 22px; margin: 10px 0; color: var(--ink-2); font-size: 14.5px; }
.doc-body li { margin: 5px 0; }

.doc-body code {
  font-family: var(--mono);
  font-size: 12.5px;
  padding: 2px 7px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.045);
  color: #e6e6ea;
  white-space: nowrap;
}

.doc-body .code-block code { padding: 0; border: none; background: none; white-space: pre; }

/* 表格（毛玻璃） */
.doc-table-wrap {
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  background: var(--glass);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  overflow-x: auto;
  margin: 16px 0;
}

.doc-table { width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 560px; }
.doc-table th, .doc-table td { padding: 11px 16px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.doc-table th { color: var(--ink); font-weight: 600; background: rgba(255, 255, 255, 0.04); white-space: nowrap; }
.doc-table td { color: var(--ink-2); }
.doc-table tr:last-child td { border-bottom: none; }
.doc-table td code { white-space: normal; word-break: break-all; }

/* 提示条 */
.callout {
  display: flex;
  gap: 12px;
  padding: 14px 18px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  background: var(--glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  color: var(--ink-2);
  font-size: 13.5px;
  margin: 16px 0;
}

.callout .ci { flex: 0 0 auto; font-weight: 700; color: var(--ink); }
.callout code { white-space: normal; }

/* 滚动显现动画 */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 600ms ease, transform 600ms ease; }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { scroll-behavior: auto !important; }
}

/* ==========================================================================
   演示页（demos.html）：场景化集成演示
   ========================================================================== */
.demo-head { padding: 120px 0 34px; text-align: center; }
.demo-head h1 { font-size: clamp(28px, 4.5vw, 40px); font-weight: 800; letter-spacing: -0.01em; }
.demo-head .lead { color: var(--ink-2); max-width: 640px; margin: 16px auto 0; }

.sdk-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding: 6px 15px;
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  background: var(--glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink-2);
}

.sdk-status i { width: 8px; height: 8px; border-radius: 50%; background: #6c6c76; }
.sdk-status.ok i { background: #fff; box-shadow: 0 0 10px rgba(255, 255, 255, 0.85); }
.sdk-status.fail i { background: #4a4a52; }

/* 场景切换 tabs */
.demo-tabs {
  display: flex;
  gap: 6px;
  justify-content: center;
  flex-wrap: wrap;
  padding: 7px;
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  background: var(--glass);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  margin: 30px auto 44px;
  max-width: 860px;
}

.demo-tab {
  flex: 1;
  min-width: 130px;
  padding: 11px 10px;
  border: none;
  border-radius: 9px;
  background: transparent;
  color: var(--ink-2);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 140ms ease, color 140ms ease;
}

.demo-tab:hover { color: var(--ink); background: rgba(255, 255, 255, 0.05); }

.demo-tab.active {
  color: #0a0a0b;
  background: #f5f5f7;
}

.scenario { display: none; }
.scenario.active { display: block; }

.scenario-title { text-align: center; margin-bottom: 26px; }
.scenario-title h2 { font-size: 22px; font-weight: 700; }
.scenario-title p { color: var(--ink-2); font-size: 14px; margin-top: 8px; }

/* 场景布局：代码 + 预览台 */
.scenario-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: start;
}

/* 预览台：毛玻璃外框 + 白色文档画布 */
.stage {
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  background: rgba(12, 12, 16, 0.6);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  padding: 14px;
}

.stage-frame {
  background: #fff;
  border-radius: var(--radius-sm);
  overflow: hidden;
  position: relative;
}

.stage-frame .preview-host { height: 640px; }

.stage-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 2px 4px 12px;
}

.stage-bar i { width: 10px; height: 10px; border-radius: 50%; background: rgba(255, 255, 255, 0.16); }
.stage-bar span { margin-left: 6px; color: var(--ink-3); font-family: var(--mono); font-size: 12px; }

/* 样例 / 操作按钮 */
.sample-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; align-items: center; }

.sample-btn {
  padding: 8px 15px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--glass);
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease;
}

.sample-btn:hover { background: var(--glass-2); border-color: rgba(255, 255, 255, 0.3); }
.sample-btn.primary { background: #f5f5f7; border-color: #f5f5f7; color: #0a0a0b; }
.sample-btn.primary:hover { background: #fff; }
.sample-btn:disabled { opacity: 0.45; cursor: not-allowed; }
.sample-btn .chip-ext { color: var(--ink-3); font-family: var(--mono); font-size: 11px; margin-left: 4px; }
.sample-btn.primary .chip-ext { color: #6c6c76; }

/* URL 场景：表单与进度 */
.url-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 14px;
}

.url-form input[type="text"] {
  flex: 1;
  min-width: 220px;
  padding: 11px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--ink);
  font-size: 13.5px;
  font-family: var(--mono);
  outline: none;
}

.url-form input[type="text"]:focus { border-color: rgba(255, 255, 255, 0.4); }
.url-form input[type="text"]::placeholder { color: var(--ink-3); }

.url-form select {
  padding: 10px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: #101014;
  color: var(--ink);
  font-size: 13px;
}

.url-form label { display: inline-flex; gap: 6px; align-items: center; color: var(--ink-2); font-size: 13px; cursor: pointer; }

.progress-panel {
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  background: var(--glass);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  padding: 16px 18px;
  margin-bottom: 14px;
}

.progress-line {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 9px 0;
  font-size: 13px;
}

.progress-line .pl-label { flex: 0 0 74px; color: var(--ink-3); }
.progress-line .pl-label.on { color: var(--ink); }

.progress-track {
  flex: 1;
  height: 5px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  border-radius: 3px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.55), #fff);
  transition: width 160ms ease;
}

.progress-line .pl-pct { flex: 0 0 44px; text-align: right; color: var(--ink-2); font-family: var(--mono); font-size: 12px; }

/* 详情页场景：信息卡 + 预览 */
.detail-grid {
  display: grid;
  grid-template-columns: 268px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.info-card .kv { display: flex; justify-content: space-between; gap: 10px; padding: 9px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
.info-card .kv:last-of-type { border-bottom: none; }
.info-card .kv b { color: var(--ink-3); font-weight: 400; }
.info-card .kv span { color: var(--ink); font-family: var(--mono); font-size: 12.5px; word-break: break-all; text-align: right; }

.feed-box {
  margin-top: 14px;
  max-height: 200px;
  overflow-y: auto;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #0b0b0e;
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.8;
}

.feed-box .fd { color: #6a6a74; }
.feed-box .fm { color: #d8d8de; }
.feed-box .fe { color: #fff; font-weight: 600; }

/* 多实例场景 */
.multi-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.multi-grid .stage-frame .preview-host { height: 460px; }
.multi-grid .stage-bar span { font-size: 11px; }

.config-bar {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
  padding: 14px 18px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  background: var(--glass);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  margin-bottom: 16px;
  font-size: 13.5px;
}

.config-bar label { display: inline-flex; gap: 6px; align-items: center; color: var(--ink-2); cursor: pointer; }
.config-bar .bar-title { color: var(--ink-3); font-size: 12px; font-weight: 700; letter-spacing: 0.14em; }

/* SDK 未加载时的占位提示 */
.sdk-fallback {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 40px 30px;
  text-align: center;
  color: #6c6c76;
  font-size: 13px;
  line-height: 1.7;
  background: #fff;
}

.sdk-fallback b { display: block; color: #333; font-size: 15px; margin-bottom: 8px; }

/* SDK 加载中的占位动画 */
.sdk-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  height: 100%;
  color: #8a8a92;
  font-size: 13px;
  background: #fff;
}

.sdk-loading i {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid #e4e4e8;
  border-top-color: #1c1c1e;
  animation: sdk-spin 0.9s linear infinite;
}

@keyframes sdk-spin { to { transform: rotate(360deg); } }

/* 演示页移动端 */
@media (max-width: 960px) {
  .detail-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .demo-head { padding: 100px 0 26px; }
  .demo-tabs { gap: 4px; padding: 5px; }
  .demo-tab { min-width: 0; padding: 10px 6px; font-size: 12.5px; }
  .stage-frame .preview-host { height: 460px; }
  .multi-grid { grid-template-columns: 1fr; }
  .multi-grid .stage-frame .preview-host { height: 380px; }
  .url-form input[type="text"] { min-width: 100%; }
}

@media (max-width: 960px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .doc-layout { grid-template-columns: 1fr; gap: 0; }
  .doc-side {
    position: fixed;
    inset: 62px 0 auto 0;
    z-index: 80;
    max-height: calc(100vh - 62px);
    padding: 18px 24px 30px;
    background: rgba(8, 8, 10, 0.92);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line);
    display: none;
  }
  body.nav-open .doc-side { display: block; }
}

@media (max-width: 760px) {
  .container { padding: 0 18px; }
  .topbar-inner { padding: 0 18px; gap: 12px; }
  .brand-tag { display: none; }

  /* 移动端：CTA 靠左吸附右侧、汉堡按钮保持最右 */
  .topbar-cta { order: 2; margin-left: auto; padding: 6px 10px; font-size: 12px; }
  .topbar-cta svg { display: none; }
  .nav-toggle { order: 3; display: flex; margin-left: 0; flex: none; }
  .brand { font-size: 15px; gap: 8px; }
  .brand-mark { width: 26px; height: 26px; font-size: 11px; }

  .main-nav {
    position: fixed;
    inset: 62px 0 auto 0;
    z-index: 80;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    margin: 0;
    padding: 14px 18px 22px;
    background: rgba(8, 8, 10, 0.92);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line);
    display: none;
  }

  body.nav-open .main-nav { display: flex; }
  .main-nav a { padding: 12px 14px; font-size: 15px; }

  .hero { padding: 118px 0 60px; }
  .stats { grid-template-columns: repeat(2, 1fr); margin-top: 52px; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .value-item { flex-direction: column; gap: 8px; padding: 24px 0; }
  .value-num { flex: none; }
  .demo-cta { padding: 44px 18px; }
  .hero-code pre { font-size: 12px; }
}