/* ============================================================
   哈哈体育信誉 · 共享站点样式 /assets/site.css
   运动数据档案系统：深空蓝底 · 档案卡 · 命令栏
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

:root {
  /* 色彩体系 */
  --ink-900: #0B1B33;
  --ink-850: #0F2240;
  --ink-800: #132A4A;
  --orange: #FF6A1F;
  --orange-soft: #FFB27A;
  --lime: #B6FF3C;
  --volt: #2C6BFF;
  --white: #FFFFFF;
  --mist: #E8EDF5;
  --slate: #6F8199;
  --rust: #8A2B16;

  --line: rgba(111, 129, 153, .32);
  --line-soft: rgba(111, 129, 153, .18);
  --on-orange: #20120A;
  --on-lime: #14200A;

  /* 形状 */
  --r-sm: 10px;
  --r-card: 18px;
  --r-lg: 28px;
  --r-pill: 999px;

  /* 留白三档 */
  --s-1: 8px;
  --s-2: 16px;
  --s-3: 24px;
  --s-4: 40px;
  --s-5: 64px;

  /* 动效 */
  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: 380ms;
  --dur-fast: 160ms;

  /* 字体 */
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-num: "Barlow Condensed", "Oswald", "DIN Alternate", "Arial Narrow", var(--font-sans);

  --maxw: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --header-h: 74px;
}

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

body {
  margin: 0;
  background: var(--ink-900);
  color: var(--mist);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body[data-nav-open] { overflow: hidden; }

img, picture, svg, video { max-width: 100%; }
img { height: auto; border: 0; }

/* ---------- 中文排版 ---------- */
h1, h2, h3, h4 {
  color: var(--white);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.1;
}
h1 { margin: 0 0 .35em; font-size: clamp(38px, 5.6vw, 72px); line-height: 1.05; }
h2 { margin: 0 0 .5em; font-size: clamp(26px, 3.4vw, 40px); }
h3 { margin: 0 0 .6em; font-size: clamp(20px, 2.2vw, 24px); }
h4 { margin: 0 0 .5em; font-size: 17px; letter-spacing: .02em; font-weight: 700; }
p { margin: 0 0 var(--s-2); }
ul, ol { margin: 0 0 var(--s-2); padding-left: 1.2em; }
li { margin-bottom: 6px; }
strong { color: var(--white); font-weight: 700; }
small { font-size: 13px; color: var(--slate); }

a { color: var(--orange-soft); text-decoration: none; transition: color var(--dur-fast) var(--ease); }
a:hover { color: var(--lime); }

:where(a, button, input, select, summary, textarea, [tabindex]):focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection { background: var(--orange); color: var(--on-orange); }

/* ---------- 通用结构与工具 ---------- */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.section { padding: var(--s-4) 0; }
.section--tight { padding: var(--s-3) 0; }
.section--loose { padding: var(--s-5) 0; }
.section--mist {
  background: var(--mist);
  color: var(--ink-800);
}
.section--mist h1, .section--mist h2, .section--mist h3, .section--mist h4 { color: var(--ink-800); }
.section--mist a { color: var(--rust); }
.section--mist a:hover { color: var(--orange); }

#main-content { scroll-margin-top: calc(var(--header-h) + 24px); outline: none; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -120px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  background: var(--lime);
  color: var(--on-lime);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  transition: top 200ms var(--ease);
}
.skip-link:focus { top: 12px; color: var(--on-lime); }

.label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--slate);
}

.num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  letter-spacing: .01em;
  line-height: 1;
  color: var(--white);
}
.num--xl { font-size: clamp(40px, 6vw, 72px); }
.num--lg { font-size: clamp(28px, 3.4vw, 40px); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1.4;
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--dur-fast) var(--ease),
              background-color var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary { background: var(--orange); color: var(--on-orange); }
.btn--primary:hover { background: var(--orange-soft); color: var(--on-orange); }

.btn--ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--mist);
}
.btn--ghost:hover { border-color: var(--orange-soft); color: var(--white); }

.btn--lime { background: var(--lime); color: var(--on-lime); }
.btn--lime:hover { background: #C9FF6E; color: var(--on-lime); }

.btn--sm { padding: 9px 16px; font-size: 13px; }
.btn--block { width: 100%; }

/* ---------- 标签胶囊 ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: rgba(232, 237, 245, .05);
  color: var(--mist);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
}
.pill--orange { border-color: rgba(255, 106, 31, .5); background: rgba(255, 106, 31, .16); color: var(--orange-soft); }
.pill--lime { border-color: rgba(182, 255, 60, .5); background: rgba(182, 255, 60, .14); color: var(--lime); }
.pill--volt { border-color: rgba(44, 107, 255, .5); background: rgba(44, 107, 255, .16); color: #8FB2FF; }
.pill--rust { border-color: rgba(138, 43, 22, .7); background: rgba(138, 43, 22, .24); color: #E2A08D; }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: .03em;
  color: var(--slate);
}
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.breadcrumb li { margin: 0; }
.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--slate);
}
.breadcrumb a { color: var(--slate); }
.breadcrumb a:hover { color: var(--orange-soft); }
.breadcrumb [aria-current="page"] { color: var(--mist); }

/* ---------- 网格骨架 ---------- */
.grid { display: grid; gap: var(--s-3); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid--stagger { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: var(--s-4); }

.layout-split {
  display: grid;
  grid-template-columns: minmax(0, 1.85fr) minmax(0, 1fr);
  gap: var(--s-4);
  align-items: start;
}
.layout-split--flip { grid-template-columns: minmax(0, 1fr) minmax(0, 1.85fr); }

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  padding: var(--s-3);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: var(--ink-800);
  overflow-wrap: break-word;
}
.card--flat { background: transparent; }
.card--lift { box-shadow: 0 18px 44px rgba(4, 10, 20, .38); }
.card--tilt-l { transform: rotate(-1.2deg); }
.card--tilt-r { transform: rotate(1.2deg); }
.card--light {
  background: var(--mist);
  border-color: transparent;
  color: var(--ink-800);
}
.card--light h1, .card--light h2, .card--light h3, .card--light h4 { color: var(--ink-800); }
.card--light a { color: var(--rust); }
.card--light a:hover { color: var(--orange); }

/* ---------- 图片容器（页面阶段放 <img>） ---------- */
.figure {
  display: block;
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background:
    radial-gradient(90% 120% at 80% 0%, rgba(44, 107, 255, .22), transparent 62%),
    linear-gradient(150deg, var(--ink-800), var(--ink-900));
}
.figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(115deg,
      rgba(232, 237, 245, .055) 0 1px,
      transparent 1px 46px);
}
.figure > img,
.figure > picture,
.figure > picture > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.figure--16x9 { aspect-ratio: 16 / 9; }
.figure--4x3 { aspect-ratio: 4 / 3; }
.figure--1x1 { aspect-ratio: 1 / 1; }
.figure--3x4 { aspect-ratio: 3 / 4; }
.figure--21x9 { aspect-ratio: 21 / 9; }

.figure__caption {
  position: absolute;
  left: 12px; right: 12px; bottom: 12px;
  z-index: 2;
  padding: 6px 10px;
  border-radius: var(--r-sm);
  background: rgba(11, 27, 51, .74);
  color: var(--mist);
  font-size: 12px;
  letter-spacing: .06em;
}

/* ---------- 章节标题条 ---------- */
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--s-2);
  margin-bottom: var(--s-3);
}
.section-head h2 { margin: 0; }
.section-head__meta {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--slate);
}

/* ---------- 数据表 ---------- */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
.table caption {
  caption-side: top;
  text-align: left;
  padding-bottom: 10px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--slate);
}
.table th,
.table td {
  padding: 12px 14px;
  text-align: left;
  border-top: 1px solid var(--line);
}
.table th {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--slate);
}
.table tbody tr:nth-child(even) { background: rgba(232, 237, 245, .035); }
.table tbody tr:hover { background: rgba(255, 106, 31, .08); }

/* ---------- 章节目录跟随 ---------- */
.toc { position: sticky; top: calc(var(--header-h) + 16px); }
.toc-list { display: grid; gap: 2px; margin: 0; padding: 0; list-style: none; }
.toc-list li { margin: 0; }
.toc-link {
  display: block;
  position: relative;
  padding: 8px 0 8px 16px;
  border-left: 1px solid var(--line);
  color: var(--slate);
  font-size: 14px;
  line-height: 1.5;
}
.toc-link:hover { color: var(--mist); }
.toc-link[aria-current="location"] {
  color: var(--white);
  font-weight: 600;
}
.toc-link[aria-current="location"]::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 6px;
  bottom: 6px;
  width: 3px;
  border-radius: 2px;
  background: var(--orange);
}

/* ---------- 入场显现 ---------- */
[data-reveal] {
  opacity: 0;
  translate: 0 18px;
  transition: opacity var(--dur) var(--ease), translate var(--dur) var(--ease);
}
[data-reveal].is-visible { opacity: 1; translate: 0 0; }
[data-reveal][data-delay="1"] { transition-delay: 80ms; }
[data-reveal][data-delay="2"] { transition-delay: 160ms; }
[data-reveal][data-delay="3"] { transition-delay: 240ms; }
[data-reveal][data-delay="4"] { transition-delay: 320ms; }

/* ============================================================
   页头：紧凑命令栏
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 27, 51, .94);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 170% at 88% -50%, rgba(255, 106, 31, .20), transparent 62%),
    radial-gradient(90% 150% at 4% 130%, rgba(44, 107, 255, .14), transparent 60%);
}

.header-inner {
  position: relative;
  z-index: 2;
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: 14px var(--gutter);
  transition: padding 280ms var(--ease);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
  color: var(--white);
  text-decoration: none;
}
.brand:hover { color: var(--white); }
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: none;
  border-radius: 12px;
  background: linear-gradient(150deg, var(--orange), #FF8A3D 58%, var(--orange-soft));
  color: var(--on-orange);
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 0;
  box-shadow: 0 6px 18px rgba(255, 106, 31, .34);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-size: 17px; font-weight: 900; letter-spacing: .01em; }
.brand-tagline {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--slate);
  white-space: nowrap;
}

/* 命令栏 */
.cmd-nav {
  flex: 1 1 auto;
  min-width: 0;
}
.cmd-list {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.cmd-list li { margin: 0; }
.cmd-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 11px;
  border-radius: var(--r-sm);
  border-bottom: 2px solid transparent;
  color: var(--mist);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .02em;
  white-space: nowrap;
  transition: background-color var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease);
}
.cmd-index {
  font-family: var(--font-num);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--slate);
}
.cmd-link:hover { background: rgba(232, 237, 245, .08); color: var(--white); }
.cmd-link:hover .cmd-index { color: var(--orange-soft); }
.cmd-link[aria-current="page"] {
  color: var(--white);
  border-bottom-color: var(--orange);
  background: rgba(255, 106, 31, .14);
}
.cmd-link[aria-current="page"] .cmd-index { color: var(--lime); }

.nav-foot { display: none; }
.nav-foot__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 var(--s-2);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--mist);
}

/* 右侧状态与操作 */
.header-side {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  flex: none;
}
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 12px;
  border: 1px solid rgba(182, 255, 60, .4);
  border-radius: var(--r-pill);
  background: rgba(182, 255, 60, .08);
  color: var(--mist);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  white-space: nowrap;
}
.status-dot {
  width: 7px;
  height: 7px;
  flex: none;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(182, 255, 60, .2);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  flex: none;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(232, 237, 245, .06);
  cursor: pointer;
}
.nav-toggle-icon {
  display: block;
  position: relative;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--white);
  transition: background-color 200ms var(--ease);
}
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--white);
  transition: transform 200ms var(--ease);
}
.nav-toggle-icon::before { top: -7px; }
.nav-toggle-icon::after { top: 7px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after { transform: translateY(-7px) rotate(-45deg); }

/* 遮罩与进度线 */
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 5;
  background: rgba(6, 15, 28, .74);
  opacity: 0;
  pointer-events: none;
  transition: opacity 260ms var(--ease);
}
.nav-scrim[data-open] { opacity: 1; pointer-events: auto; }

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  z-index: 6;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--orange), var(--orange-soft) 55%, var(--lime));
}

/* 收缩形态 */
.site-header[data-scrolled] .header-inner { padding-top: 8px; padding-bottom: 8px; }
.site-header[data-scrolled] .brand-tagline { display: none; }
.site-header[data-scrolled] .status-pill { display: none; }
.site-header[data-scrolled] .cmd-index { display: none; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: var(--s-5);
  padding-top: 3px;
  background: linear-gradient(180deg, #0A1728, var(--ink-900) 58%);
  border-top: 1px solid var(--line);
  color: var(--mist);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--orange), var(--orange-soft) 38%, transparent 78%);
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: var(--s-5) var(--gutter) var(--s-4);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 2fr);
  gap: var(--s-4);
}

.footer-brand { display: block; }
.brand--footer .brand-mark { width: 34px; height: 34px; font-size: 16px; }
.footer-note {
  margin: var(--s-2) 0 0;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate);
}
.footer-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: var(--s-2) 0 0;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--mist);
}

.footer-groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s-3);
}
.footer-group-title {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--slate);
  text-transform: uppercase;
}
.footer-links { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
.footer-links li { margin: 0; }
.footer-links a {
  display: inline-block;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  color: var(--mist);
  font-size: 15px;
  font-weight: 500;
}
.footer-links a:hover {
  color: var(--orange-soft);
  border-bottom-color: var(--orange-soft);
}

.footer-meta {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: var(--s-3) var(--gutter) var(--s-4);
  border-top: 1px solid var(--line);
  display: grid;
  gap: 10px;
}
.footer-contact { margin: 0; font-size: 14px; color: var(--mist); }
.footer-update { margin: 0; font-size: 13px; color: var(--slate); }

.footer-baseline {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: var(--s-3) var(--gutter) var(--s-4);
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  font-size: 13px;
  color: var(--slate);
}
.footer-legal { letter-spacing: .06em; }
.footer-copy { letter-spacing: .04em; }

/* 返回顶部 */
.to-top {
  position: fixed;
  right: clamp(16px, 3vw, 32px);
  bottom: clamp(16px, 3vw, 32px);
  z-index: 95;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid var(--orange);
  border-radius: var(--r-pill);
  background: rgba(11, 27, 51, .92);
  color: var(--white);
  font-family: inherit;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  cursor: pointer;
  opacity: 0;
  translate: 0 14px;
  pointer-events: none;
  transition: opacity 280ms var(--ease), translate 280ms var(--ease),
              background-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.to-top::before {
  content: "";
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 7px solid currentColor;
}
.to-top[data-visible] { opacity: 1; translate: 0 0; pointer-events: auto; }
.to-top:hover { background: var(--orange); color: var(--on-orange); }

/* ============================================================
   响应式
   ============================================================ */
@media (min-width: 1181px) and (max-width: 1340px) {
  .cmd-link { padding: 9px 8px; font-size: 13px; }
}

@media (max-width: 1180px) {
  .cmd-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 10;
    width: min(86vw, 360px);
    padding: 96px var(--s-3) var(--s-3);
    overflow-y: auto;
    background: var(--ink-800);
    border-left: 1px solid var(--line);
    box-shadow: -24px 0 60px rgba(4, 10, 20, .5);
    transform: translateX(102%);
    transition: transform 340ms var(--ease);
  }
  .cmd-nav[data-open] { transform: translateX(0); }

  .cmd-list { flex-direction: column; align-items: stretch; gap: 0; }
  .cmd-link {
    justify-content: flex-start;
    padding: 15px 12px;
    border-bottom: 1px solid var(--line-soft);
    border-radius: 0;
    font-size: 16px;
  }
  .cmd-link:hover { background: rgba(232, 237, 245, .07); }
  .cmd-link[aria-current="page"] {
    border-bottom-color: var(--line-soft);
    box-shadow: inset 3px 0 0 var(--orange);
    background: rgba(255, 106, 31, .13);
  }
  .nav-foot { display: block; margin-top: var(--s-3); }
  .nav-toggle { display: inline-flex; }
  .header-side .btn { display: none; }
}

@media (max-width: 900px) {
  body { font-size: 16px; }
  .footer-inner { grid-template-columns: 1fr; padding: var(--s-4) var(--gutter); }
  .footer-groups { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
  .layout-split,
  .layout-split--flip { grid-template-columns: 1fr; gap: var(--s-3); }
  .toc { position: static; }
}

@media (max-width: 760px) {
  .status-pill { display: none; }
  .brand-tagline { display: none; }
  .section { padding: var(--s-3) 0; }
  .section--loose { padding: var(--s-4) 0; }
}

@media (max-width: 520px) {
  h1 { font-size: clamp(30px, 9vw, 40px); }
  .footer-groups { grid-template-columns: 1fr 1fr; }
  .footer-baseline { flex-direction: column; gap: 6px; }
  .to-top { padding: 10px 14px; font-size: 12px; }
}

/* ============================================================
   降低动效
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  [data-reveal] { opacity: 1 !important; translate: 0 0 !important; }
  .to-top { opacity: 1; translate: 0 0; }
  .btn:hover { transform: none; }
}