/* ==========================================================================
   融全云 API · 企业级设计系统 (theme.css)
   --------------------------------------------------------------------------
   1. 设计令牌 (Design Tokens)
   2. 基础重置 / 排版
   3. 布局工具
   4. 顶部导航
   5. 按钮
   6. 标签 / 徽标
   7. 卡片
   8. 代码块
   9. 表格
   10. 步骤 / 手风琴 / 选项卡
   11. 表单
   12. 控制台布局
   13. 页脚
   14. 提示条 (Toast)
   15. 响应式
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  /* 品牌主色 —— 深海军蓝到科技蓝 */
  --brand-950: #040d1c;
  --brand-900: #061428;
  --brand-800: #0a2144;
  --brand-700: #0f2e5c;
  --brand-600: #143c7a;
  --brand-500: #1657ff;
  --brand-400: #3d7bff;
  --brand-300: #7ba6ff;
  --brand-200: #b9cdff;
  --brand-100: #e4ecff;
  --brand-50:  #f2f6ff;

  /* 强调色 —— 数据青 */
  --cyan-600: #0093b0;
  --cyan-500: #00b8d9;
  --cyan-300: #6fdcf0;
  --cyan-100: #e0f7fc;

  /* 中性色 */
  --ink-900: #0b1220;
  --ink-800: #16203a;
  --ink-700: #33405a;
  --ink-600: #46536e;
  --ink-500: #5a6883;
  --ink-400: #818ea6;
  --ink-300: #aab4c6;
  --ink-200: #d8dee9;
  --ink-100: #edf1f7;
  --ink-50:  #f6f8fc;
  --white:   #ffffff;

  /* 语义色 */
  --success-600: #07875a;
  --success-500: #0aa66e;
  --success-100: #e3f7ef;
  --warn-600:    #b4780a;
  --warn-500:    #e8a317;
  --warn-100:    #fdf3e0;
  --danger-600:  #b93336;
  --danger-500:  #e2474a;
  --danger-100:  #fdeaea;
  --info-500:    var(--brand-500);
  --info-100:    var(--brand-100);

  /* 语义别名（浅色主题） */
  --bg-page:    #f4f6fb;
  --bg-surface: var(--white);
  --bg-subtle:  var(--ink-50);
  --bg-inset:   #eef1f8;
  --bg-invert:  var(--brand-900);
  --text-strong: var(--ink-900);
  --text-body:   var(--ink-700);
  --text-muted:  var(--ink-500);
  --text-faint:  var(--ink-400);
  --text-invert: #ffffff;
  --border-strong: var(--ink-200);
  --border-subtle: #e9edf4;
  --border-brand:  var(--brand-200);

  /* 阴影 —— 用细边框 + 极浅投影替代重投影 */
  --shadow-xs: 0 1px 2px rgba(11, 18, 32, .04);
  --shadow-sm: 0 1px 3px rgba(11, 18, 32, .05), 0 1px 2px rgba(11, 18, 32, .03);
  --shadow-md: 0 4px 12px rgba(15, 46, 92, .07), 0 1px 3px rgba(15, 46, 92, .04);
  --shadow-lg: 0 12px 32px rgba(15, 46, 92, .10), 0 2px 8px rgba(15, 46, 92, .04);
  --shadow-xl: 0 24px 64px rgba(10, 33, 68, .16);
  --ring-brand: 0 0 0 3px rgba(22, 87, 255, .16);

  /* 圆角 */
  --r-xs: 6px;
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 22px;
  --r-full: 999px;

  /* 间距刻度 (8pt) */
  --s-1: 4px;  --s-2: 8px;  --s-3: 12px; --s-4: 16px;
  --s-5: 20px; --s-6: 24px; --s-7: 32px; --s-8: 40px;
  --s-9: 48px; --s-10: 64px; --s-11: 80px; --s-12: 104px;

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC",
    Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", "Courier New", monospace;

  --header-h: 64px;
  --container: 1200px;
  --ease: cubic-bezier(.4, 0, .2, 1);
}

/* 深色主题 */
[data-theme="dark"] {
  --bg-page:    #070e1c;
  --bg-surface: #0d1628;
  --bg-subtle:  #101c33;
  --bg-inset:   #16233d;
  --bg-invert:  #050b16;
  --text-strong: #f2f5fb;
  --text-body:   #c3cddd;
  --text-muted:  #8d9ab0;
  --text-faint:  #6b7789;
  --text-invert: #ffffff;
  --border-strong: #23324d;
  --border-subtle: #1a2740;
  --border-brand:  #24396a;
  --brand-50:  #0e1a30;
  --brand-100: #13233f;
  --brand-200: #22385f;
  --ink-50:  #101c33;
  --ink-100: #16233d;
  --ink-200: #23324d;
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, .3);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, .35);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, .4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, .45);
  --shadow-xl: 0 24px 64px rgba(0, 0, 0, .55);
  --success-100: #0b3226;
  --warn-100:    #33260a;
  --danger-100:  #3a1a1c;
  --info-100:    #13233f;
  --cyan-100:    #0a2c36;
}

/* ---------- 2. 基础重置 / 排版 ---------- */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg-page);
  color: var(--text-body);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5 {
  margin: 0;
  color: var(--text-strong);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -.01em;
}

h1 { font-size: clamp(30px, 4vw, 46px); letter-spacing: -.025em; }
h2 { font-size: clamp(23px, 2.6vw, 32px); letter-spacing: -.02em; }
h3 { font-size: 17px; }
h4 { font-size: 15px; }

p { margin: 0; }

a { color: var(--brand-500); text-decoration: none; transition: color .18s var(--ease); }
a:hover { color: var(--brand-400); }

code, kbd, pre, samp { font-family: var(--font-mono); font-size: .875em; }

code:not(.raw) {
  background: var(--brand-50);
  color: var(--brand-700);
  border: 1px solid var(--border-subtle);
  padding: 1px 6px;
  border-radius: var(--r-xs);
  white-space: break-spaces;
  overflow-wrap: anywhere;
}

/* 表格里的代码保持不换行，避免列错位 */
table.data code:not(.raw) { white-space: nowrap; overflow-wrap: normal; }

[data-theme="dark"] code:not(.raw) { color: var(--brand-300); }

hr { border: 0; border-top: 1px solid var(--border-subtle); margin: var(--s-7) 0; }

img, svg { max-width: 100%; }

::selection { background: var(--brand-200); color: var(--ink-900); }

:focus-visible {
  outline: 2px solid var(--brand-500);
  outline-offset: 2px;
  border-radius: var(--r-xs);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- 3. 布局工具 ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--s-6); }
.container-narrow { max-width: 880px; }

.section { padding: var(--s-11) 0; }
.section-sm { padding: var(--s-9) 0; }
.section-tight-top { padding-top: var(--s-8); }

.section-head { max-width: 720px; margin-bottom: var(--s-8); }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 + p { margin-top: var(--s-3); font-size: 16px; color: var(--text-muted); }

.eyebrow {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font-size: 12.5px; font-weight: 600; letter-spacing: .08em;
  text-transform: uppercase; color: var(--brand-500); margin-bottom: var(--s-3);
}
.eyebrow::before {
  content: ""; width: 18px; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--brand-500), var(--cyan-500));
}
.section-head.center .eyebrow::before { display: none; }

.grid { display: grid; gap: var(--s-5); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-auto { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }

.stack { display: flex; flex-direction: column; }
.row { display: flex; align-items: center; }
.wrap { flex-wrap: wrap; }
.gap-1 { gap: var(--s-1); } .gap-2 { gap: var(--s-2); }
.gap-3 { gap: var(--s-3); } .gap-4 { gap: var(--s-4); }
.gap-6 { gap: var(--s-6); }
.spacer { flex: 1; }
.mt-2 { margin-top: var(--s-2); } .mt-4 { margin-top: var(--s-4); }
.mt-6 { margin-top: var(--s-6); } .mt-8 { margin-top: var(--s-8); }
.text-center { text-align: center; }
.muted { color: var(--text-muted); }
.faint { color: var(--text-faint); }
.small { font-size: 13px; }
.tiny { font-size: 12.5px; }
.mono { font-family: var(--font-mono); }
.nowrap { white-space: nowrap; }

/* ---------- 4. 顶部导航 ---------- */
.topbar {
  background: linear-gradient(90deg, var(--brand-900), var(--brand-700) 55%, var(--brand-600));
  color: #dce6fb; font-size: 13px;
}
.topbar .container {
  display: flex; align-items: center; gap: var(--s-4);
  min-height: 40px; flex-wrap: wrap; padding-top: 4px; padding-bottom: 4px;
}
.topbar a { color: #fff; font-weight: 600; }
.topbar .dot {
  width: 7px; height: 7px; border-radius: 50%; background: #4ade9d;
  box-shadow: 0 0 0 3px rgba(74, 222, 157, .22); flex: none;
}
.topbar .spacer { min-width: 8px; }

.site-header {
  position: sticky; top: 0; z-index: 60;
  background: color-mix(in srgb, var(--bg-surface) 86%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border-subtle);
}
.site-header .container {
  display: flex; align-items: center; gap: var(--s-6);
  height: var(--header-h);
}

.brand { display: flex; align-items: center; gap: 10px; flex: none; }
.brand:hover { color: inherit; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(140deg, var(--brand-500), #0b3fd1 45%, var(--cyan-500));
  display: grid; place-items: center;
  box-shadow: 0 4px 12px rgba(22, 87, 255, .28);
}
.brand-mark svg { width: 22px; height: 22px; display: block; }
.brand-text {
  font-size: 18px; font-weight: 700; color: var(--text-strong);
  letter-spacing: -.02em; display: flex; align-items: baseline; gap: 5px;
}
.brand-text em {
  font-style: normal; font-size: 11px; font-weight: 700; letter-spacing: .06em;
  color: var(--brand-500); background: var(--brand-50);
  border: 1px solid var(--border-brand); border-radius: var(--r-xs);
  padding: 1px 5px; transform: translateY(-2px);
}

.nav { display: flex; align-items: center; gap: 2px; }
.nav a {
  padding: 8px 14px; border-radius: var(--r-sm); color: var(--text-body);
  font-size: 14.5px; font-weight: 500; transition: all .18s var(--ease);
}
.nav a:hover { background: var(--bg-subtle); color: var(--text-strong); }
.nav a.active { color: var(--brand-500); background: var(--brand-50); font-weight: 600; }

.header-actions { display: flex; align-items: center; gap: var(--s-2); margin-left: auto; }

.nav-toggle {
  display: none; width: 40px; height: 40px; border-radius: var(--r-sm);
  border: 1px solid var(--border-strong); background: var(--bg-surface);
  cursor: pointer; color: var(--text-body); place-items: center;
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  height: 42px; padding: 0 20px;
  border: 1px solid transparent; border-radius: var(--r-sm);
  font-family: inherit; font-size: 14.5px; font-weight: 600; line-height: 1;
  cursor: pointer; white-space: nowrap; text-decoration: none;
  transition: all .18s var(--ease);
}
.btn:disabled { opacity: .5; cursor: not-allowed; }

.btn-primary {
  background: linear-gradient(180deg, var(--brand-400), var(--brand-500));
  color: #fff; box-shadow: 0 2px 8px rgba(22, 87, 255, .26);
}
.btn-primary:hover {
  color: #fff; transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(22, 87, 255, .34);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background: var(--bg-surface); color: var(--text-strong);
  border-color: var(--border-strong);
}
.btn-secondary:hover { border-color: var(--brand-300); color: var(--brand-500); background: var(--brand-50); }

.btn-ghost { background: transparent; color: var(--text-body); }
.btn-ghost:hover { background: var(--bg-subtle); color: var(--text-strong); }

.btn-light {
  background: rgba(255, 255, 255, .12); color: #fff;
  border-color: rgba(255, 255, 255, .22);
}
.btn-light:hover { background: rgba(255, 255, 255, .2); color: #fff; }

.btn-sm { height: 34px; padding: 0 14px; font-size: 13.5px; }
.btn-lg { height: 50px; padding: 0 28px; font-size: 15.5px; }
.btn-block { width: 100%; }

.btn-group { display: flex; flex-wrap: wrap; gap: var(--s-3); }

/* 复制按钮 */
.copy-btn {
  display: inline-flex; align-items: center; gap: 5px;
  height: 28px; padding: 0 10px; border-radius: var(--r-xs);
  background: rgba(255, 255, 255, .08); color: #c9d6ef;
  border: 1px solid rgba(255, 255, 255, .14);
  font-family: inherit; font-size: 12px; font-weight: 600; cursor: pointer;
  transition: all .18s var(--ease);
}
.copy-btn:hover { background: rgba(255, 255, 255, .16); color: #fff; }
.copy-btn.done { background: rgba(74, 222, 157, .18); border-color: rgba(74, 222, 157, .4); color: #7ff0bd; }
.copy-btn.on-light {
  background: var(--bg-subtle); color: var(--text-muted); border-color: var(--border-strong);
}
.copy-btn.on-light:hover { background: var(--brand-50); color: var(--brand-500); }

/* ---------- 6. 标签 / 徽标 ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 2px 9px; border-radius: var(--r-full);
  font-size: 12px; font-weight: 600; line-height: 1.7;
  background: var(--bg-subtle); color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}
.badge-brand { background: var(--brand-50); color: var(--brand-600); border-color: var(--border-brand); }
.badge-success { background: var(--success-100); color: var(--success-600); border-color: transparent; }
.badge-warn { background: var(--warn-100); color: var(--warn-600); border-color: transparent; }
.badge-danger { background: var(--danger-100); color: var(--danger-600); border-color: transparent; }
.badge-cyan { background: var(--cyan-100); color: var(--cyan-600); border-color: transparent; }
.badge-solid { background: var(--brand-500); color: #fff; border-color: transparent; }

.badge .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; flex: none; }
.badge-success .dot { animation: pulse 2.2s var(--ease) infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }

.pill {
  display: inline-flex; align-items: center;
  padding: 2px 8px; border-radius: var(--r-xs);
  background: var(--bg-inset); color: var(--text-muted);
  font-family: var(--font-mono); font-size: 12px; white-space: nowrap;
}
.pill code, .pill .raw { background: none; border: 0; padding: 0; color: inherit; font-size: inherit; }

/* ---------- 7. 卡片 ---------- */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
}
.card-pad { padding: var(--s-6); }
.card-pad-lg { padding: var(--s-7); }
.card-hover { transition: transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease); }
.card-hover:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-200);
}

.card-head {
  display: flex; align-items: flex-start; gap: var(--s-3);
  margin-bottom: var(--s-4);
}

/* 接口卡片 */
.api-card { display: flex; flex-direction: column; gap: var(--s-4); padding: var(--s-6); }
.api-card .api-top { display: flex; align-items: flex-start; gap: var(--s-3); }
.api-card .api-icon {
  width: 40px; height: 40px; border-radius: var(--r-md); flex: none;
  display: grid; place-items: center;
  background: var(--brand-50); color: var(--brand-500);
  border: 1px solid var(--border-brand);
}
.api-card .api-icon svg { width: 20px; height: 20px; }
.api-card h3 { font-size: 16px; }
.api-card .api-desc { font-size: 13.5px; color: var(--text-muted); line-height: 1.6; min-height: 43px; }
.api-card .api-params { display: flex; flex-wrap: wrap; gap: 6px; }
.api-card .api-foot {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: var(--s-3); padding-top: var(--s-4);
  border-top: 1px dashed var(--border-subtle); margin-top: auto;
}
.price { display: flex; align-items: baseline; gap: 2px; color: var(--text-strong); }
.price .cur { font-size: 14px; font-weight: 600; }
.price .num { font-size: 26px; font-weight: 700; letter-spacing: -.02em; }
.price .unit { font-size: 12.5px; color: var(--text-faint); font-weight: 500; margin-left: 2px; }

/* 特性卡 */
.feature { padding: var(--s-6); }
.feature .f-icon {
  width: 42px; height: 42px; border-radius: var(--r-md);
  display: grid; place-items: center; margin-bottom: var(--s-4);
  background: linear-gradient(140deg, var(--brand-50), var(--cyan-100));
  color: var(--brand-500);
}
.feature .f-icon svg { width: 21px; height: 21px; }
.feature h3 { margin-bottom: var(--s-2); }
.feature p { font-size: 13.5px; color: var(--text-muted); line-height: 1.65; }

/* 统计块 */
.stat {
  padding: var(--s-5) var(--s-6);
  border-left: 1px solid var(--border-subtle);
}
.stat:first-child { border-left: 0; }
.stat b {
  display: block; font-size: 27px; font-weight: 700; color: var(--text-strong);
  letter-spacing: -.02em; line-height: 1.2;
}
.stat b em { font-style: normal; font-size: 15px; font-weight: 600; margin-left: 2px; color: var(--text-muted); }
.stat span { font-size: 13px; color: var(--text-muted); }

.stat-strip {
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg); box-shadow: var(--shadow-sm); overflow: hidden;
}

/* ---------- 8. 代码块 ---------- */
.code-card {
  background: var(--brand-950);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: var(--r-lg);
  overflow: hidden;
  min-width: 0;
  box-shadow: var(--shadow-xl);
}
.code-card-head {
  display: flex; align-items: center; gap: var(--s-3);
  padding: 10px 14px; background: rgba(255, 255, 255, .04);
  border-bottom: 1px solid rgba(255, 255, 255, .07);
}
.code-card-head .lights { display: flex; gap: 6px; }
.code-card-head .lights i {
  width: 10px; height: 10px; border-radius: 50%; background: rgba(255, 255, 255, .18);
}
.code-card-head .file {
  font-family: var(--font-mono); font-size: 12.5px; color: #8fa6cc;
}
.code-card-head .spacer { flex: 1; }

.tabs { display: flex; gap: 2px; }
.tabs button {
  border: 0; background: none; cursor: pointer;
  padding: 5px 11px; border-radius: var(--r-xs);
  font-family: var(--font-mono); font-size: 12.5px; color: #8fa6cc;
  transition: all .18s var(--ease);
}
.tabs button:hover { color: #dce6fb; background: rgba(255, 255, 255, .07); }
.tabs button.active { color: #fff; background: rgba(22, 87, 255, .28); }

.code-body { position: relative; min-width: 0; }
.code-body pre {
  margin: 0; padding: var(--s-5) var(--s-6);
  overflow-x: auto; max-height: 420px;
}
.code-body code.raw {
  background: none; border: 0; padding: 0;
  color: #dbe6f8; font-size: 12.8px; line-height: 1.85; white-space: pre;
}
.code-body .tok-key { color: #7fb0ff; }
.code-body .tok-str { color: #7fe3b8; }
.code-body .tok-num { color: #ffc978; }
.code-body .tok-cmt { color: #64789b; font-style: italic; }
.code-body .tok-fn  { color: #c9a4ff; }

/* 浅色代码块（文档正文） */
.pre-light {
  background: var(--bg-inset); border: 1px solid var(--border-subtle);
  border-radius: var(--r-md); padding: var(--s-4) var(--s-5);
  overflow-x: auto; margin: var(--s-4) 0;
}
.pre-light code { background: none; border: 0; padding: 0; color: var(--text-strong); font-size: 12.8px; line-height: 1.8; }

/* ---------- 9. 表格 ---------- */
.table-wrap {
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--shadow-sm);
}
.table-scroll { overflow-x: auto; }
table.data { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.data th, table.data td {
  text-align: left; padding: 12px 16px;
  border-bottom: 1px solid var(--border-subtle); vertical-align: middle;
}
table.data thead th {
  background: var(--bg-subtle); color: var(--text-muted);
  font-weight: 600; font-size: 12.5px; letter-spacing: .02em;
  white-space: nowrap; position: sticky; top: 0; z-index: 1;
}
table.data tbody tr:last-child td { border-bottom: 0; }
table.data tbody tr:hover td { background: var(--bg-subtle); }
table.data td.nowrap, table.data th.nowrap { white-space: nowrap; }

.table-toolbar {
  display: flex; align-items: center; gap: var(--s-3); flex-wrap: wrap;
  padding: var(--s-4) var(--s-5); border-bottom: 1px solid var(--border-subtle);
}

.pagination {
  display: flex; align-items: center; justify-content: center; gap: var(--s-2);
  padding: var(--s-4);
}
.pagination button {
  min-width: 34px; height: 34px; padding: 0 10px;
  border: 1px solid var(--border-strong); background: var(--bg-surface);
  border-radius: var(--r-sm); color: var(--text-body);
  font-family: inherit; font-size: 13.5px; cursor: pointer;
}
.pagination button:hover { border-color: var(--brand-300); color: var(--brand-500); }
.pagination button.active { background: var(--brand-500); border-color: var(--brand-500); color: #fff; }
.pagination button:disabled { opacity: .45; cursor: not-allowed; }

/* ---------- 10. 步骤 / 手风琴 / 选项卡 ---------- */
.steps { display: grid; gap: var(--s-5); grid-template-columns: repeat(4, 1fr); counter-reset: step; }
.step-item { position: relative; padding-top: var(--s-7); }
.step-item::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  position: absolute; top: 0; left: 0;
  font-family: var(--font-mono); font-size: 13px; font-weight: 700;
  color: var(--brand-500);
}
.step-item::after {
  content: ""; position: absolute; top: 9px; left: 34px; right: -20px; height: 1px;
  background: linear-gradient(90deg, var(--border-strong), transparent);
}
.step-item:last-child::after { display: none; }
.step-item h3 { font-size: 15.5px; margin-bottom: 6px; }
.step-item p { font-size: 13.5px; color: var(--text-muted); line-height: 1.6; }

.accordion { border: 1px solid var(--border-subtle); border-radius: var(--r-lg); background: var(--bg-surface); overflow: hidden; box-shadow: var(--shadow-sm); }
.acc-item + .acc-item { border-top: 1px solid var(--border-subtle); }
.acc-q {
  width: 100%; display: flex; align-items: center; gap: var(--s-4);
  padding: var(--s-5) var(--s-6); border: 0; background: none; cursor: pointer;
  font-family: inherit; font-size: 15px; font-weight: 600; color: var(--text-strong);
  text-align: left; transition: background .18s var(--ease);
}
.acc-q:hover { background: var(--bg-subtle); }
.acc-q .chev { margin-left: auto; flex: none; color: var(--text-faint); transition: transform .25s var(--ease); }
.acc-item.open .acc-q .chev { transform: rotate(180deg); }
.acc-a { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .28s var(--ease); }
.acc-item.open .acc-a { grid-template-rows: 1fr; }
.acc-a > div { overflow: hidden; }
.acc-a .inner { padding: 0 var(--s-6) var(--s-5); font-size: 14px; color: var(--text-muted); line-height: 1.75; }
.acc-a .inner p + p { margin-top: var(--s-3); }

.seg {
  display: inline-flex; gap: 3px; padding: 3px;
  background: var(--bg-inset); border-radius: var(--r-md); border: 1px solid var(--border-subtle);
}
.seg button {
  border: 0; background: none; cursor: pointer; white-space: nowrap;
  padding: 7px 15px; border-radius: var(--r-sm);
  font-family: inherit; font-size: 13.5px; font-weight: 600; color: var(--text-muted);
  transition: all .18s var(--ease);
}
.seg button:hover { color: var(--text-strong); }
.seg button.active { background: var(--bg-surface); color: var(--brand-500); box-shadow: var(--shadow-xs); }

/* ---------- 11. 表单 ---------- */
.field { display: flex; flex-direction: column; gap: 7px; }
.field > label { font-size: 13.5px; font-weight: 600; color: var(--text-strong); }
.field .hint { font-size: 12.5px; color: var(--text-faint); }
.field .err { font-size: 12.5px; color: var(--danger-500); }

.input, .select, .textarea {
  width: 100%; height: 44px; padding: 0 14px;
  background: var(--bg-surface); color: var(--text-strong);
  border: 1px solid var(--border-strong); border-radius: var(--r-sm);
  font-family: inherit; font-size: 14.5px;
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}
.textarea { height: auto; padding: 12px 14px; line-height: 1.6; resize: vertical; min-height: 96px; }
.input::placeholder, .textarea::placeholder { color: var(--text-faint); }
.input:focus, .select:focus, .textarea:focus {
  outline: none; border-color: var(--brand-500); box-shadow: var(--ring-brand);
}
.input-icon { position: relative; }
.input-icon .input { padding-left: 40px; }
.input-icon svg {
  position: absolute; left: 13px; top: 50%; transform: translateY(-50%);
  width: 17px; height: 17px; color: var(--text-faint); pointer-events: none;
}

.check { display: flex; align-items: flex-start; gap: 9px; font-size: 13.5px; color: var(--text-muted); }
.check input { margin: 3px 0 0; width: 16px; height: 16px; accent-color: var(--brand-500); flex: none; }

.search-box { position: relative; flex: 1; min-width: 220px; }
.search-box .input { height: 38px; padding-left: 38px; font-size: 13.5px; }

/* ---------- 12. 控制台布局 ---------- */
.console { display: grid; grid-template-columns: 236px minmax(0, 1fr); min-height: 100vh; }
.side {
  background: var(--brand-900); color: #b8c7e2;
  padding: var(--s-5) var(--s-4); position: sticky; top: 0;
  height: 100vh; overflow-y: auto; display: flex; flex-direction: column;
}
.side .brand { padding: 0 var(--s-3) var(--s-6); }
.side .brand-text { color: #fff; }
.side .brand-text em { background: rgba(255, 255, 255, .1); border-color: rgba(255, 255, 255, .16); color: #9fc0ff; }
.side-group { margin-bottom: var(--s-5); }
.side-group > b {
  display: block; padding: 0 var(--s-3) var(--s-2);
  font-size: 11.5px; font-weight: 600; letter-spacing: .1em;
  text-transform: uppercase; color: #5f7398;
}
.side a {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-radius: var(--r-sm);
  color: #b8c7e2; font-size: 14px; font-weight: 500;
  transition: all .18s var(--ease);
}
.side a svg { width: 17px; height: 17px; flex: none; opacity: .85; }
.side a:hover { background: rgba(255, 255, 255, .07); color: #fff; }
.side a.active { background: linear-gradient(90deg, rgba(22, 87, 255, .9), rgba(22, 87, 255, .55)); color: #fff; box-shadow: 0 4px 14px rgba(22, 87, 255, .3); }
.side a .count {
  margin-left: auto; font-size: 11.5px; background: rgba(255, 255, 255, .12);
  border-radius: var(--r-full); padding: 0 7px; color: #d5e1f7;
}

.side-user {
  margin-top: auto; padding-top: var(--s-5);
  border-top: 1px solid rgba(255, 255, 255, .1);
  display: flex; align-items: center; gap: 10px; padding-left: var(--s-3); padding-right: var(--s-3);
}
.side-user .avatar {
  width: 34px; height: 34px; border-radius: 50%; flex: none;
  background: linear-gradient(140deg, var(--brand-400), var(--cyan-500));
  display: grid; place-items: center; color: #fff; font-weight: 700; font-size: 14px;
}
.side-user b { display: block; color: #fff; font-size: 13.5px; }
.side-user span { font-size: 12px; color: #7d8fb3; }

.main { min-width: 0; background: var(--bg-page); }
.main-head {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: var(--s-4); flex-wrap: wrap;
  padding: var(--s-4) var(--s-7);
  background: color-mix(in srgb, var(--bg-page) 88%, transparent);
  backdrop-filter: blur(12px); border-bottom: 1px solid var(--border-subtle);
}
.main-head h1 { font-size: 21px; }
.main-head .sub { font-size: 13px; color: var(--text-muted); }
.main-body { padding: var(--s-6) var(--s-7) var(--s-10); }

.kpi { padding: var(--s-5) var(--s-6); }
.kpi .label { font-size: 13px; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }
.kpi .value {
  margin-top: 6px; font-size: 28px; font-weight: 700; color: var(--text-strong);
  letter-spacing: -.02em; line-height: 1.2;
}
.kpi .value small { font-size: 14px; font-weight: 600; color: var(--text-muted); margin-left: 3px; }
.kpi .delta { margin-top: 6px; font-size: 12.5px; }
.delta.up { color: var(--success-500); }
.delta.down { color: var(--danger-500); }

.bar-chart { display: flex; align-items: flex-end; gap: 10px; height: 150px; padding-top: var(--s-4); }
.bar-chart .bar {
  flex: 1; min-width: 0; border-radius: var(--r-xs) var(--r-xs) 0 0;
  background: linear-gradient(180deg, var(--brand-400), var(--brand-500));
  opacity: .9; position: relative; transition: opacity .18s var(--ease);
}
.bar-chart .bar:hover { opacity: 1; }
.bar-chart .bar span {
  position: absolute; top: -20px; left: 50%; transform: translateX(-50%);
  font-size: 11.5px; color: var(--text-faint); white-space: nowrap; opacity: 0;
  transition: opacity .18s var(--ease);
}
.bar-chart .bar:hover span { opacity: 1; }
.chart-axis { display: flex; gap: 10px; margin-top: 8px; }
.chart-axis span { flex: 1; text-align: center; font-size: 11.5px; color: var(--text-faint); }

/* ---------- 13. 页脚 ---------- */
.site-footer { background: var(--brand-900); color: #93a6c6; padding: var(--s-10) 0 var(--s-6); }
.footer-grid {
  display: grid; grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: var(--s-8) var(--s-6);
}
.site-footer .brand-text { color: #fff; }
.site-footer .brand-text em { background: rgba(255, 255, 255, .1); border-color: rgba(255, 255, 255, .16); color: #9fc0ff; }
.site-footer p { font-size: 13.5px; line-height: 1.75; color: #93a6c6; }
.footer-col b {
  display: block; color: #fff; font-size: 14px; font-weight: 600;
  margin-bottom: var(--s-4);
}
.footer-col a {
  display: block; color: #93a6c6; font-size: 13.5px; padding: 5px 0;
}
.footer-col a:hover { color: #fff; }
.footer-bottom {
  margin-top: var(--s-8); padding-top: var(--s-5);
  border-top: 1px solid rgba(255, 255, 255, .1);
  display: flex; align-items: center; gap: var(--s-4); flex-wrap: wrap;
  font-size: 12.5px; color: #7d8fb3;
}

/* ---------- 14. 提示条 ---------- */
.notice {
  display: flex; gap: var(--s-3);
  padding: var(--s-4) var(--s-5); border-radius: var(--r-md);
  font-size: 13.5px; line-height: 1.7;
  background: var(--brand-50); border: 1px solid var(--border-brand); color: var(--ink-700);
}
.notice svg { width: 18px; height: 18px; flex: none; margin-top: 2px; color: var(--brand-500); }
.notice b { color: var(--text-strong); }
.notice-warn { background: var(--warn-100); border-color: transparent; color: var(--warn-600); }
.notice-warn svg { color: var(--warn-600); }
.notice-warn b { color: var(--warn-600); }
.notice-danger { background: var(--danger-100); border-color: transparent; color: var(--danger-600); }
.notice-danger svg { color: var(--danger-600); }
.notice-danger b { color: var(--danger-600); }
.notice-success { background: var(--success-100); border-color: transparent; color: var(--success-600); }
.notice-success svg { color: var(--success-600); }
.notice-success b { color: var(--success-600); }

[data-theme="dark"] .notice { color: var(--brand-200); }
[data-theme="dark"] .notice b { color: #fff; }

.toast-host {
  position: fixed; bottom: var(--s-6); left: 50%; transform: translateX(-50%);
  z-index: 999; display: flex; flex-direction: column; gap: var(--s-2); align-items: center;
  pointer-events: none;
}
.toast {
  display: flex; align-items: center; gap: var(--s-3);
  padding: 11px 18px; border-radius: var(--r-md);
  background: var(--ink-900); color: #fff; font-size: 13.5px; font-weight: 500;
  box-shadow: var(--shadow-lg); animation: toastIn .24s var(--ease);
}
.toast svg { width: 17px; height: 17px; color: #7ff0bd; }
@keyframes toastIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* 深色横幅区块 */
.band-dark {
  background:
    radial-gradient(900px 400px at 12% 0%, rgba(22, 87, 255, .3), transparent 62%),
    radial-gradient(700px 380px at 88% 100%, rgba(0, 184, 217, .2), transparent 60%),
    var(--brand-900);
  color: #b8c7e2;
}
.band-dark h2, .band-dark h3 { color: #fff; }
.band-dark .muted { color: #93a6c6; }

.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1000px 460px at 8% -12%, rgba(22, 87, 255, .16), transparent 60%),
    radial-gradient(760px 420px at 96% 6%, rgba(0, 184, 217, .13), transparent 62%),
    var(--bg-page);
  border-bottom: 1px solid var(--border-subtle);
}
.hero-grid {
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: var(--s-11); align-items: center;
  padding: var(--s-12) 0 var(--s-11);
}
.hero h1 { margin-bottom: var(--s-5); }
.hero h1 .grad {
  background: linear-gradient(100deg, var(--brand-500), var(--cyan-500));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lede { font-size: 17px; color: var(--text-muted); line-height: 1.75; max-width: 540px; }
.hero .btn-group { margin-top: var(--s-7); }
.hero-meta {
  display: flex; flex-wrap: wrap; gap: var(--s-5) var(--s-6);
  margin-top: var(--s-7); padding-top: var(--s-6);
  border-top: 1px solid var(--border-subtle);
}
.hero-meta div { display: flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--text-muted); }
.hero-meta svg { width: 16px; height: 16px; color: var(--success-500); flex: none; }

.hero-visual { position: relative; min-width: 0; }
.hero-badge-float {
  position: absolute; z-index: 2; right: -12px; bottom: -18px;
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--r-md); padding: 11px 15px; box-shadow: var(--shadow-lg);
  display: flex; align-items: center; gap: 10px;
}
.hero-badge-float .ok {
  width: 30px; height: 30px; border-radius: 50%; flex: none;
  background: var(--success-100); color: var(--success-500);
  display: grid; place-items: center;
}
.hero-badge-float b { display: block; font-size: 13px; color: var(--text-strong); }
.hero-badge-float span { font-size: 11.5px; color: var(--text-faint); }

@media (max-width: 1024px) {
  .hero-badge-float { display: none; }
}

/* 价格/计费卡 */
.docs-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: var(--s-6);
  align-items: start;
}
.docs-toc { position: sticky; top: 84px; }

@media (max-width: 900px) {
  .docs-layout { grid-template-columns: minmax(0, 1fr); }
  .docs-toc { position: static; top: auto; }
}

.plan { padding: var(--s-7); display: flex; flex-direction: column; gap: var(--s-4); position: relative; }
.plan.featured { border-color: var(--brand-300); box-shadow: var(--shadow-lg); }
.plan.featured::before {
  content: "推荐"; position: absolute; top: -11px; left: var(--s-7);
  background: linear-gradient(90deg, var(--brand-500), var(--cyan-500));
  color: #fff; font-size: 11.5px; font-weight: 700;
  padding: 3px 11px; border-radius: var(--r-full); letter-spacing: .04em;
}
.plan ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.plan li { display: flex; gap: 10px; font-size: 13.5px; color: var(--text-body); }
.plan li svg { width: 17px; height: 17px; color: var(--success-500); flex: none; margin-top: 2px; }

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1080px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .step-item:nth-child(2)::after { display: none; }
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: var(--s-9); padding: var(--s-10) 0 var(--s-9); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { border-left: 0; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--border-subtle); }
  .console { grid-template-columns: 1fr; }
  .side {
    position: fixed; z-index: 200; left: 0; top: 0; width: 260px;
    transform: translateX(-100%); transition: transform .28s var(--ease);
    box-shadow: var(--shadow-xl);
  }
  .side.open { transform: translateX(0); }
  .side-backdrop {
    position: fixed; inset: 0; background: rgba(4, 13, 28, .5);
    z-index: 199; opacity: 0; pointer-events: none; transition: opacity .28s var(--ease);
  }
  .side-backdrop.show { opacity: 1; pointer-events: auto; }
  .side-toggle { display: grid !important; }
  .main-head, .main-body { padding-left: var(--s-5); padding-right: var(--s-5); }
}

@media (max-width: 820px) {
  .nav-toggle { display: grid; }
  .nav {
    position: fixed; inset: calc(var(--header-h)) 0 auto 0; z-index: 55;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: var(--bg-surface); border-bottom: 1px solid var(--border-subtle);
    padding: var(--s-3) var(--s-5) var(--s-5);
    box-shadow: var(--shadow-lg);
    display: none;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 14px; font-size: 15px; }
  .header-actions .btn-ghost { display: none; }
}

@media (max-width: 720px) {
  :root { --s-11: 56px; --s-12: 68px; }
  .container { padding: 0 var(--s-4); }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .grid-auto { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .step-item::after { display: none; }
  .stat-strip { grid-template-columns: 1fr; }
  .stat { border-left: 0; }
  .stat + .stat { border-top: 1px solid var(--border-subtle); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--s-7); }
  .main-body { padding-left: var(--s-4); padding-right: var(--s-4); }
  .main-head { padding: var(--s-3) var(--s-4); }
  .card-pad, .card-pad-lg, .api-card, .feature, .plan { padding: var(--s-5); }
  .acc-q { padding: var(--s-4) var(--s-5); font-size: 14.5px; }
  .acc-a .inner { padding: 0 var(--s-5) var(--s-4); }
  .topbar .container { font-size: 12.5px; }
  .topbar .hide-sm { display: none; }
  .hero-meta { gap: var(--s-3) var(--s-5); }
  .hero .lede { font-size: 15.5px; }
}

@media print {
  .site-header, .topbar, .site-footer, .btn, .copy-btn { display: none !important; }
  body { background: #fff; }
}

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