/* =========================================================
   熊猫体育主站 · 共享样式 /assets/site.css
   夜间赛场 / 目录型内容地图 / 近单色 + 荧光绿强调
   ========================================================= */

/* ---------- 1. reset ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 104px;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--paper);
  background-color: #0A1411;
  background-image:
    radial-gradient(1200px 700px at 92% -12%, rgba(184, 255, 61, 0.07), transparent 62%),
    radial-gradient(900px 620px at 2% 10%, rgba(15, 42, 40, 0.9), transparent 70%),
    linear-gradient(165deg, #0F2A28 0%, #0A1411 46%, #14181A 100%);
  background-repeat: no-repeat;
  background-attachment: scroll;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote { margin: 0; }
h1, h2, h3, h4, h5, h6 { font-weight: 800; line-height: 1.12; letter-spacing: -0.02em; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg { max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
table { border-collapse: collapse; }
[hidden] { display: none !important; }
::selection { background: var(--lime); color: #0A1411; }

a {
  color: var(--lime);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: rgba(184, 255, 61, 0.4);
}

:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
  border-radius: 3px;
}

/* ---------- 2. tokens ---------- */
:root {
  --ink: #0A1411;
  --ink-2: #14181A;
  --field: #1C3A31;
  --line: #2C3F38;
  --paper: #F3F5EF;
  --mute: #9BA9A1;
  --lime: #B8FF3D;
  --orange: #FF7A2F;
  --sheet: #E9E6DC;
  --night: #0F2A28;

  --max: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --r-xs: 2px;
  --r-sm: 4px;
  --r-md: 6px;
  --pill: 999px;
  --ease: cubic-bezier(.2, .7, .3, 1);

  --font-sans: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei",
    system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Menlo, Consolas, monospace;
}

/* ---------- 3. 通用排版与布局 ---------- */
.container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(48px, 7vw, 96px); }
.section--tight { padding-block: clamp(28px, 4vw, 48px); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.display-xl {
  font-size: clamp(40px, 7.2vw, 72px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.02;
}
.display-lg {
  font-size: clamp(32px, 4.6vw, 48px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.06;
}
.display-md {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.15;
}
.lead { font-size: 18px; line-height: 1.7; color: rgba(243, 245, 239, 0.82); }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.text-mute { color: var(--mute); }
.text-lime { color: var(--lime); }

.side-note {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--mute);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mute);
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: currentColor;
  opacity: 0.6;
}
.eyebrow--lime { color: var(--lime); }

.split {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}
.split--flip { grid-template-columns: 7fr 5fr; }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(12px, 1.6vw, 20px);
}

.visually-hidden {
  position: absolute !important;
  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;
}

/* ---------- 4. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: var(--pill);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 180ms var(--ease), border-color 180ms var(--ease),
    color 180ms var(--ease), background-color 180ms var(--ease), box-shadow 180ms var(--ease);
}
.btn-primary { background: var(--lime); color: #0A1411; }
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(184, 255, 61, 0.2);
}
.btn-ghost {
  border-color: var(--line);
  color: var(--paper);
  background: rgba(20, 24, 26, 0.5);
}
.btn-ghost:hover { border-color: var(--lime); color: var(--lime); }
.btn--sm { min-height: 38px; padding: 0 15px; font-size: 13px; }

/* ---------- 5. 头部 · 悬浮胶囊 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  padding: 16px var(--gutter) 12px;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(10, 20, 17, 0.9) 0%, rgba(10, 20, 17, 0) 100%);
  transition: padding 200ms var(--ease), background-color 200ms var(--ease),
    border-color 200ms var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header[data-scrolled="true"] {
  padding: 8px var(--gutter);
  background: rgba(10, 20, 17, 0.94);
  border-bottom-color: var(--line);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.header-shell {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 20px);
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
}
.header-shell > * { pointer-events: auto; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding: 8px 18px 8px 11px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: rgba(20, 24, 26, 0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--paper);
  text-decoration: none;
  transition: border-color 180ms var(--ease), transform 180ms var(--ease);
}
.brand:hover { border-color: rgba(184, 255, 61, 0.5); transform: translateY(-1px); }
.brand--footer {
  padding: 8px 18px 8px 11px;
  background: rgba(28, 58, 49, 0.5);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  color: var(--paper);
}
.brand-mark svg { width: 100%; height: 100%; display: block; }

.brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.brand-zh { font-size: 15px; font-weight: 800; letter-spacing: 0.02em; }
.brand-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--mute);
}

.primary-nav {
  margin-inline: auto;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: rgba(20, 24, 26, 0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.nav-list { display: flex; align-items: center; gap: 2px; }
.nav-link {
  display: block;
  padding: 9px 14px;
  border-radius: var(--pill);
  font-size: 14px;
  font-weight: 600;
  color: rgba(243, 245, 239, 0.72);
  text-decoration: none;
  white-space: nowrap;
  transition: color 160ms var(--ease), background-color 160ms var(--ease);
}
.nav-link:hover { color: var(--paper); background: rgba(184, 255, 61, 0.09); }
.nav-link[aria-current="page"] {
  background: var(--lime);
  color: #0A1411;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}
.version-badge,
.lang-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 5px 9px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  color: var(--mute);
}
.version-badge { color: var(--lime); border-color: rgba(184, 255, 61, 0.42); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 0 15px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: rgba(20, 24, 26, 0.72);
  color: var(--paper);
  font-size: 13px;
  font-weight: 700;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.nav-toggle-label { font-family: var(--font-mono); letter-spacing: 0.1em; }
.nav-toggle-bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: background-color 180ms var(--ease);
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: transform 180ms var(--ease);
}
.nav-toggle-bars::before { top: -5px; }
.nav-toggle-bars::after { top: 5px; }
.nav-toggle[aria-expanded="true"] { color: var(--lime); border-color: rgba(184, 255, 61, 0.55); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-5px) rotate(-45deg); }

/* 头部阅读进度线（JS 注入） */
.scroll-progress {
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  pointer-events: none;
  overflow: hidden;
}
.scroll-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--lime), var(--orange));
}

/* ---------- 6. 通用组件 ---------- */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(16px, 2vw, 22px);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(28, 58, 49, 0.55), rgba(20, 24, 26, 0.72));
  color: var(--paper);
  text-decoration: none;
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}
.card:hover { transform: translateY(-2px); border-color: rgba(184, 255, 61, 0.55); }
.card__title { font-size: 18px; font-weight: 800; }
.card__meta {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mute);
}
.card__body { font-size: 14px; color: rgba(243, 245, 239, 0.75); }
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: clamp(12px, 1.6vw, 18px);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: var(--r-xs);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mute);
}
.tag--lime { background: var(--lime); border-color: var(--lime); color: #0A1411; }
.tag--orange { color: var(--orange); border-color: rgba(255, 122, 47, 0.5); }

.index-list { display: flex; flex-direction: column; border-top: 1px solid var(--line); }
.index-row {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr) auto;
  gap: 6px 16px;
  align-items: baseline;
  padding: 14px 4px;
  border-bottom: 1px solid var(--line);
  color: var(--paper);
  text-decoration: none;
  transition: background-color 160ms var(--ease), padding-left 160ms var(--ease);
}
.index-row:hover { background: rgba(184, 255, 61, 0.05); padding-left: 12px; }
.index-row__no { font-family: var(--font-mono); font-size: 12px; color: var(--lime); }
.index-row__title { font-size: 16px; font-weight: 700; }
.index-row__note {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--mute);
}

.ledger { width: 100%; font-size: 14px; }
.ledger caption {
  text-align: left;
  padding-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mute);
}
.ledger th,
.ledger td {
  text-align: left;
  padding: 11px 12px;
  border-bottom: 1px solid var(--line);
}
.ledger th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mute);
}
.ledger tbody tr { transition: background-color 160ms var(--ease); }
.ledger tbody tr:hover { background: rgba(184, 255, 61, 0.05); }
.ledger .num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

.fold { border-top: 1px solid var(--line); }
.fold:last-of-type { border-bottom: 1px solid var(--line); }
.fold__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 2px;
  font-size: 16px;
  font-weight: 700;
  list-style: none;
  cursor: pointer;
  transition: color 160ms var(--ease);
}
.fold__head::-webkit-details-marker { display: none; }
.fold__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--lime);
}
.fold[open] .fold__head::after { content: "–"; }
.fold__head:hover { color: var(--lime); }
.fold__body {
  max-width: 72ch;
  padding: 0 2px 20px;
  font-size: 15px;
  color: rgba(243, 245, 239, 0.78);
}

.paper-sheet {
  padding: clamp(20px, 3vw, 32px);
  border-left: 4px solid var(--lime);
  border-radius: var(--r-xs);
  background: var(--sheet);
  color: var(--ink-2);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.42);
}
.paper-sheet a { color: var(--ink-2); }

.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(140deg, var(--night), var(--ink-2) 72%);
}
.media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--masked::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(15, 42, 40, 0) 35%, rgba(10, 20, 17, 0.82) 100%);
}
.media-cap {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mute);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: clamp(16px, 2.5vw, 28px);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mute);
}
.breadcrumb li { display: flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before { content: "/"; color: var(--line); }
.breadcrumb a { color: var(--mute); text-decoration: none; }
.breadcrumb a:hover { color: var(--lime); }
.breadcrumb [aria-current="page"] { color: var(--paper); }

.toc-rail {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 14px;
  border-left: 1px solid var(--line);
}
.toc-rail__title {
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mute);
}
.toc-rail a {
  position: relative;
  padding: 7px 0 7px 10px;
  font-size: 13.5px;
  color: rgba(243, 245, 239, 0.6);
  text-decoration: none;
  transition: color 160ms var(--ease);
}
.toc-rail a::before {
  content: "";
  position: absolute;
  left: -15px;
  top: 50%;
  width: 2px;
  height: 0;
  transform: translateY(-50%);
  background: var(--lime);
  transition: height 200ms var(--ease);
}
.toc-rail a:hover { color: var(--paper); }
.toc-rail a[aria-current="true"] { color: var(--paper); }
.toc-rail a[aria-current="true"]::before { height: 18px; }

.anchor-nav {
  display: flex;
  gap: 8px;
  padding-bottom: 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}
.anchor-nav a {
  flex: 0 0 auto;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  font-size: 13px;
  color: rgba(243, 245, 239, 0.72);
  text-decoration: none;
  transition: color 160ms var(--ease), border-color 160ms var(--ease),
    background-color 160ms var(--ease);
}
.anchor-nav a:hover { border-color: var(--lime); color: var(--lime); }
.anchor-nav a[aria-current="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: #0A1411;
}

.stat { display: flex; flex-direction: column; gap: 4px; }
.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--lime);
}
.stat__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mute);
}
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: clamp(16px, 2.4vw, 28px);
  padding-block: clamp(18px, 2.6vw, 28px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.filter-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.filter-chip {
  min-height: 36px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: transparent;
  color: rgba(243, 245, 239, 0.72);
  font-size: 13px;
  font-weight: 600;
  transition: color 160ms var(--ease), border-color 160ms var(--ease),
    background-color 160ms var(--ease);
}
.filter-chip:hover { border-color: rgba(184, 255, 61, 0.55); color: var(--lime); }
.filter-chip[aria-pressed="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: #0A1411;
}
.filter-status {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--mute);
}

.path-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: clamp(40px, 6vw, 72px);
  padding-block: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.path-bar__text { max-width: 46ch; font-size: 15px; color: rgba(243, 245, 239, 0.8); }

.back-to-top {
  position: fixed;
  right: var(--gutter);
  bottom: calc(20px + env(safe-area-inset-bottom, 0px));
  z-index: 70;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(20, 24, 26, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 15px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 200ms var(--ease), transform 200ms var(--ease),
    visibility 200ms, border-color 180ms var(--ease);
}
.back-to-top[data-visible="true"] { opacity: 1; visibility: visible; transform: none; }
.back-to-top:hover { border-color: var(--lime); }

/* ---------- 7. 页脚 ---------- */
.site-footer {
  margin-top: clamp(72px, 10vw, 128px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(20, 24, 26, 0.35) 0%, rgba(10, 20, 17, 0.96) 55%, #0A1411 100%);
}
.footer-shell {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 72px) var(--gutter) clamp(20px, 3vw, 28px);
}
.footer-top {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 2.6fr;
  gap: clamp(28px, 4vw, 56px);
  padding-bottom: clamp(28px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
}
.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}
.footer-note {
  max-width: 26ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mute);
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 32px);
}
.footer-col { display: flex; flex-direction: column; gap: 12px; }
.footer-col-title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
}
.footer-list { display: flex; flex-direction: column; gap: 9px; }
.footer-link {
  display: inline-block;
  font-size: 14px;
  color: rgba(243, 245, 239, 0.72);
  text-decoration: none;
  transition: color 160ms var(--ease), transform 160ms var(--ease);
}
.footer-link:hover { color: var(--lime); transform: translateX(2px); }
.footer-value {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mute);
  word-break: break-word;
}
.footer-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-top: 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--mute);
}
.footer-icp { letter-spacing: 0.04em; }
.footer-copy { color: rgba(155, 169, 161, 0.82); }

/* ---------- 8. 响应式 ---------- */
@media (max-width: 1024px) {
  .split,
  .split--flip { grid-template-columns: 1fr; }
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .footer-top { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .primary-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    margin-inline: 0;
    padding: 10px;
    border-radius: 18px;
    background: rgba(16, 26, 23, 0.97);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 200ms var(--ease), transform 200ms var(--ease),
      visibility 0s linear 200ms;
  }
  .primary-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition-delay: 0s;
  }
  .nav-list {
    flex-wrap: nowrap;
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }
  .nav-list::-webkit-scrollbar { height: 4px; }
  .nav-list::-webkit-scrollbar-thumb { background: var(--line); border-radius: 2px; }

  .header-actions .btn-login {
    position: fixed;
    left: var(--gutter);
    right: var(--gutter);
    bottom: calc(14px + env(safe-area-inset-bottom, 0px));
    z-index: 90;
    max-width: 420px;
    margin-inline: auto;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.55);
  }
  body { padding-bottom: calc(84px + env(safe-area-inset-bottom, 0px)); }

  .back-to-top { bottom: calc(84px + env(safe-area-inset-bottom, 0px)); }

  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .index-row { grid-template-columns: 52px minmax(0, 1fr); }
  .index-row__note { grid-column: 2; }
  html { scroll-padding-top: 88px; }
}

@media (max-width: 560px) {
  .brand-sub { display: none; }
  .lang-badge { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bar { flex-direction: column; align-items: flex-start; gap: 8px; }
  .grid-12 { grid-template-columns: 1fr; }
  .display-xl { font-size: 40px; }
}

/* ---------- 9. 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}