/* =========================================================
   亚新体育主站 · 共享样式 /assets/site.css
   夜间赛场数据指挥室：网格底纹 + 命令栏 + 比分牌 + 叠层标签
   ========================================================= */

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

:root {
  --ink-900: #06110D;
  --ink-800: #0B1F1A;
  --panel-900: #101418;
  --panel-700: #14332B;
  --line-600: #2A5245;
  --cyan: #35E7D0;
  --orange: #FF6A2B;
  --paper: #F4F1E8;
  --mute: #9AB3A8;

  --line-soft: rgba(42, 82, 69, .62);
  --line-faint: rgba(42, 82, 69, .30);
  --cyan-soft: rgba(53, 231, 208, .12);
  --orange-soft: rgba(255, 106, 43, .12);
  --glass: rgba(16, 20, 24, .72);

  --font-serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", Georgia, "Times New Roman", serif;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "DejaVu Sans Mono", monospace;

  --shell: 1320px;
  --pad: 26px;
  --header-h: 80px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: 160ms;
}

html {
  background: var(--ink-900);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
html.is-nav-open { overflow: hidden; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.75;
  font-weight: 400;
  color: var(--paper);
  background-color: var(--ink-800);
  background-image:
    linear-gradient(to right, rgba(42, 82, 69, .16) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 82, 69, .16) 1px, transparent 1px);
  background-size: 74px 74px, 74px 74px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    radial-gradient(60% 45% at 88% -6%, rgba(53, 231, 208, .10), transparent 62%),
    radial-gradient(55% 45% at -6% 104%, rgba(255, 106, 43, .08), transparent 66%),
    linear-gradient(180deg, rgba(6, 17, 13, .30), rgba(6, 17, 13, .78));
}

/* ---------- 排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -.012em;
  color: var(--paper);
}
h1 { font-size: clamp(38px, 6vw, 72px); }
h2 { font-size: clamp(26px, 3.4vw, 40px); }
h3 { font-size: clamp(20px, 2.2vw, 26px); }
h4 { font-size: 19px; letter-spacing: 0; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
a { color: var(--cyan); text-decoration: none; transition: color var(--dur) var(--ease); }
a:hover { color: var(--paper); }
strong, b { font-weight: 600; color: var(--paper); }
ul, ol, li { margin: 0; padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
img { height: auto; }
figure { margin: 0; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
table { border-collapse: collapse; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 2px; }
::selection { background: var(--cyan); color: var(--ink-900); }
#main-content:focus { outline: none; }

/* ---------- 通用工具 ---------- */
.container { width: 100%; max-width: var(--shell); margin: 0 auto; padding: 0 var(--pad); }
.container-narrow { max-width: 860px; }
.section { position: relative; padding: 76px 0; border-top: 1px solid var(--line-faint); }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.mute { color: var(--mute); }
.text-cyan { color: var(--cyan); }
.text-orange { color: var(--orange); }
.kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .26em;
  text-transform: uppercase; color: var(--cyan);
}
.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;
}
.skip-link {
  position: absolute; left: 14px; top: -70px; z-index: 200;
  background: var(--cyan); color: var(--ink-900);
  font-size: 13px; font-weight: 600; letter-spacing: .06em;
  padding: 11px 18px; border-radius: 2px;
  transition: top var(--dur) var(--ease);
}
.skip-link:focus, .skip-link:focus-visible { top: 12px; color: var(--ink-900); }

.grid { display: grid; gap: 22px; }
.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)); }
.split { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 34px; }

.page-head { padding: 54px 0 34px; border-bottom: 1px solid var(--line-faint); }
.page-lede { max-width: 62ch; font-size: 17px; color: var(--mute); line-height: 1.85; margin-top: 18px; }

/* ---------- 章节与索引 ---------- */
.section-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 14px 20px; margin-bottom: 26px; }
.section-num {
  font-family: var(--font-mono); font-size: 13px; letter-spacing: .18em;
  color: var(--orange); border: 1px solid rgba(255, 106, 43, .45);
  padding: 3px 8px; border-radius: 2px;
}
.section-title { font-size: clamp(24px, 2.8vw, 34px); }
.section-rail {
  position: sticky; top: calc(var(--header-h) + 26px);
  display: flex; flex-direction: column; gap: 4px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .12em;
}
.section-rail a {
  color: var(--mute); padding: 4px 0 4px 12px;
  border-left: 1px solid var(--line-faint);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}
.section-rail a:hover { color: var(--paper); }
.section-rail a.is-active { color: var(--cyan); border-left-color: var(--cyan); padding-left: 16px; }

.breadcrumbs {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .1em; color: var(--mute);
}
.breadcrumbs li { display: flex; align-items: center; gap: 8px; }
.breadcrumbs li + li::before { content: "/"; color: var(--line-600); }
.breadcrumbs a { color: var(--mute); }
.breadcrumbs a:hover { color: var(--cyan); }
.breadcrumbs [aria-current="page"] { color: var(--paper); }

/* ---------- 按钮 / 标签 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 18px; border: 1px solid transparent; border-radius: 2px;
  font-family: var(--font-sans); font-size: 14px; font-weight: 500; letter-spacing: .05em;
  text-decoration: none; white-space: nowrap; cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn-primary { background: var(--orange); border-color: var(--orange); color: #200D03; font-weight: 600; }
.btn-primary:hover { background: #ff8a55; border-color: #ff8a55; color: #200D03; transform: translateY(-1px); }
.btn-ghost { background: rgba(53, 231, 208, .05); border-color: var(--line-soft); color: var(--paper); }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); background: var(--cyan-soft); }
.btn-line { background: transparent; border-color: var(--line-soft); color: var(--paper); }
.btn-line:hover { border-color: var(--cyan); color: var(--cyan); }

.tag {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 5px 11px; border: 1px solid var(--line-soft); border-radius: 2px;
  font-size: 12.5px; letter-spacing: .06em; color: var(--mute);
  background: rgba(16, 20, 24, .55); cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.tag:hover { color: var(--paper); border-color: var(--line-600); }
.tag.is-active, .tag[aria-pressed="true"] { color: var(--cyan); border-color: var(--cyan); background: var(--cyan-soft); }
.tag-key { color: var(--orange); border-color: rgba(255, 106, 43, .5); background: var(--orange-soft); }

/* ---------- 面板 / 叠层 ---------- */
.panel {
  position: relative; padding: 20px 20px 22px;
  background: var(--panel-900); border: 1px solid var(--line-soft); border-radius: 2px;
}
.panel-dark { background: var(--panel-700); }
.panel-label {
  display: block; font-family: var(--font-mono); font-size: 11px;
  letter-spacing: .22em; text-transform: uppercase; color: var(--mute); margin-bottom: 10px;
}
.paper {
  position: relative; background: var(--panel-700);
  border: 1px solid var(--line-soft); box-shadow: 7px 7px 0 rgba(6, 17, 13, .55);
}
.stamp {
  position: absolute; top: -11px; left: 16px; z-index: 2;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .16em;
  background: var(--cyan); color: var(--ink-900); padding: 3px 9px;
}

/* ---------- 比分牌 ---------- */
.scoreboard { display: flex; align-items: flex-end; gap: 8px; margin: 0; }
.score-value {
  font-family: var(--font-mono); font-variant-numeric: tabular-nums;
  font-size: clamp(34px, 5vw, 56px); line-height: 1; color: var(--cyan);
}
.scoreboard.is-key .score-value { color: var(--orange); }
.score-unit {
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .16em;
  color: var(--mute); padding-bottom: 5px;
}

/* ---------- 图例 ---------- */
.legend { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 13px; color: var(--mute); }
.legend-item { display: flex; align-items: center; gap: 8px; }
.legend-swatch { width: 15px; height: 8px; border: 1px solid var(--line-soft); flex: 0 0 auto; }
.swatch-cyan { background: var(--cyan); border-color: var(--cyan); }
.swatch-orange { background: var(--orange); border-color: var(--orange); }
.swatch-line { background: transparent; border-color: var(--line-600); }

/* ---------- 横向信息带 ---------- */
.strip {
  display: flex; gap: 14px; overflow-x: auto; padding-bottom: 12px;
  scroll-snap-type: x proximity;
  scrollbar-color: var(--line-600) transparent;
  scrollbar-width: thin;
  overscroll-behavior-x: contain;
}
.strip::-webkit-scrollbar { height: 6px; }
.strip::-webkit-scrollbar-thumb { background: var(--line-600); }
.strip::-webkit-scrollbar-track { background: rgba(42, 82, 69, .2); }
.strip > * { scroll-snap-align: start; flex: 0 0 auto; }
.strip.is-dragging { cursor: grabbing; scroll-snap-type: none; }
.strip-item {
  min-width: 236px; padding: 16px 18px;
  background: var(--panel-900); border: 1px solid var(--line-soft); border-left: 2px solid var(--line-600);
}
.strip-item.is-key { border-left-color: var(--orange); }

/* ---------- 媒体容器 ---------- */
.media-frame {
  position: relative; overflow: hidden; border: 1px solid var(--line-soft);
  background:
    linear-gradient(140deg, rgba(53, 231, 208, .10), rgba(6, 17, 13, .88)),
    repeating-linear-gradient(45deg, rgba(42, 82, 69, .35) 0 1px, transparent 1px 13px);
}
.media-frame::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(180deg, transparent 42%, rgba(6, 17, 13, .78));
}
.media-frame img { width: 100%; height: 100%; object-fit: cover; }
.media-16x9 { aspect-ratio: 16 / 9; }
.media-4x3 { aspect-ratio: 4 / 3; }
.media-3x4 { aspect-ratio: 3 / 4; }
.media-1x1 { aspect-ratio: 1 / 1; }
.media-cap { font-size: 13px; line-height: 1.8; color: var(--mute); margin-top: 9px; }

/* ---------- 表格 / 长文 ---------- */
.data-table { width: 100%; font-size: 14px; }
.data-table caption { caption-side: top; text-align: left; font-size: 12.5px; color: var(--mute); padding-bottom: 10px; }
.data-table th, .data-table td { padding: 11px 12px; border-bottom: 1px solid var(--line-faint); text-align: left; vertical-align: baseline; }
.data-table th {
  font-family: var(--font-mono); font-size: 11.5px; font-weight: 400;
  letter-spacing: .14em; color: var(--mute); border-bottom-color: var(--line-soft);
}
.data-table td.num { font-family: var(--font-mono); color: var(--cyan); text-align: right; font-variant-numeric: tabular-nums; }
.data-table tbody tr:hover { background: rgba(53, 231, 208, .05); }

.prose { max-width: 72ch; }
.prose h2, .prose h3 { margin: 1.4em 0 .5em; }
.prose ul, .prose ol { margin: 0 0 1em 0; }
.prose li { position: relative; padding-left: 18px; margin-bottom: .4em; color: var(--paper); }
.prose li::before { content: ""; position: absolute; left: 0; top: .78em; width: 8px; height: 1px; background: var(--cyan); }
.prose blockquote {
  margin: 1.4em 0; padding: 4px 0 4px 18px;
  border-left: 2px solid var(--orange); color: var(--mute);
}

/* ---------- 显现 ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 520ms var(--ease), transform 520ms var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

/* =========================================================
   页头 · 命令栏
   ========================================================= */
.site-header {
  position: sticky; top: 0; z-index: 80;
  background: rgba(6, 17, 13, .95);
  border-bottom: 1px solid var(--line-soft);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.header-rail {
  height: 7px;
  background-image: repeating-linear-gradient(to right, var(--line-600) 0 1px, transparent 1px 26px);
  opacity: .55;
  border-bottom: 1px solid var(--line-faint);
}
.header-inner {
  display: flex; align-items: center; gap: 20px;
  max-width: var(--shell); margin: 0 auto;
  padding: 11px var(--pad);
}
.brand-block { display: flex; align-items: center; gap: 16px; flex: 0 0 auto; min-width: 0; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--paper); }
.brand:hover { color: var(--paper); }
.brand-mark {
  position: relative; width: 40px; height: 40px; flex: 0 0 auto;
  display: grid; place-items: center;
  font-family: var(--font-serif); font-size: 20px; font-weight: 700; color: var(--cyan);
  border: 1px solid var(--line-600);
  background: linear-gradient(135deg, var(--panel-700), transparent);
}
.brand-mark::after {
  content: ""; position: absolute; right: -1px; bottom: -1px;
  width: 8px; height: 8px; background: var(--orange);
}
.brand-text { display: block; }
.brand-name {
  display: block; font-family: var(--font-serif); font-size: 20px; font-weight: 700;
  letter-spacing: .02em; line-height: 1.15; color: var(--paper);
}
.brand-sub {
  display: block; font-family: var(--font-mono); font-size: 10.5px;
  letter-spacing: .22em; color: var(--mute);
}
.brand-badge {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12px; letter-spacing: .08em; color: var(--mute);
  border: 1px solid var(--line-soft); border-radius: 2px;
  padding: 4px 9px; white-space: nowrap;
}
.badge-dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--cyan);
  box-shadow: 0 0 0 3px var(--cyan-soft);
  animation: badge-pulse 2.4s var(--ease) infinite;
}
@keyframes badge-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(53, 231, 208, .10); }
  50% { box-shadow: 0 0 0 6px rgba(53, 231, 208, .02); }
}

.header-tail { display: flex; align-items: center; gap: 16px; margin-left: auto; min-width: 0; }
.header-status {
  display: none; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .16em; color: var(--mute);
  white-space: nowrap;
}
.status-dot { width: 5px; height: 5px; background: var(--orange); flex: 0 0 auto; }

.site-nav { display: flex; align-items: center; gap: 10px; min-width: 0; }
.nav-list { display: flex; align-items: center; gap: 2px; }
.nav-item { position: relative; }
.nav-link {
  position: relative; display: flex; align-items: baseline; gap: 6px;
  padding: 9px 10px; border-radius: 2px;
  font-size: 14px; letter-spacing: .02em; color: var(--mute);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav-idx { font-family: var(--font-mono); font-size: 10px; letter-spacing: .06em; opacity: .6; }
.nav-label { white-space: nowrap; }
.nav-link::after {
  content: ""; position: absolute; left: 10px; right: 10px; bottom: 3px; height: 1px;
  background: var(--cyan); transform: scaleX(0); transform-origin: left center;
  transition: transform 180ms var(--ease);
}
.nav-link:hover, .nav-link:focus-visible { color: var(--paper); background: rgba(53, 231, 208, .07); }
.nav-link:hover::after, .nav-link:focus-visible::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--paper); }
.nav-link[aria-current="page"]::after { transform: scaleX(1); }
.nav-link[aria-current="page"] .nav-idx { color: var(--cyan); opacity: 1; }

.nav-hint {
  position: absolute; top: calc(100% + 9px); left: 0; z-index: 6;
  padding: 8px 12px; white-space: nowrap;
  font-family: var(--font-sans); font-size: 12px; line-height: 1.5; letter-spacing: 0;
  color: var(--paper); background: var(--panel-900);
  border: 1px solid var(--line-soft); border-left: 2px solid var(--cyan);
  opacity: 0; transform: translateY(-5px); pointer-events: none;
  transition: opacity 180ms var(--ease), transform 180ms var(--ease);
}
.nav-link:hover .nav-hint, .nav-link:focus-visible .nav-hint { opacity: 1; transform: none; }

.nav-cta { display: flex; align-items: center; gap: 8px; padding-left: 14px; border-left: 1px solid var(--line-faint); }

.nav-toggle {
  display: none; align-items: center; gap: 10px;
  padding: 9px 13px; border: 1px solid var(--line-soft); border-radius: 2px;
  color: var(--paper); background: rgba(16, 20, 24, .6);
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .18em;
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle-bars { display: grid; gap: 4px; width: 16px; }
.nav-toggle-bars i { display: block; height: 1px; background: var(--cyan); transition: transform 180ms var(--ease), opacity 180ms var(--ease); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

.site-header[data-scrolled="true"] .header-inner { padding-top: 7px; padding-bottom: 7px; }
.site-header[data-scrolled="true"] .brand-sub { display: none; }
.site-header[data-scrolled="true"] .brand-mark { width: 34px; height: 34px; font-size: 17px; }

.progress-track {
  position: absolute; left: 0; right: 0; bottom: -1px; height: 2px;
  background: rgba(42, 82, 69, .35); overflow: hidden;
}
.progress-fill {
  display: block; height: 100%; width: 0;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  transition: width 90ms linear;
}

/* =========================================================
   页脚 · 封底刻度
   ========================================================= */
.site-footer {
  position: relative; margin-top: 84px;
  background: var(--ink-900);
  border-top: 1px solid var(--line-soft);
  color: var(--mute);
}
.footer-gauge {
  height: 8px;
  background-image: repeating-linear-gradient(to right, var(--line-600) 0 1px, transparent 1px 34px);
  opacity: .5;
  border-bottom: 1px solid var(--line-faint);
}
.footer-inner { padding-top: 44px; padding-bottom: 30px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 30px; }
.footer-logo {
  font-family: var(--font-serif); font-size: 22px; font-weight: 700;
  color: var(--paper); letter-spacing: .02em; margin-bottom: 8px;
}
.footer-tag { font-size: 13px; line-height: 1.8; color: var(--mute); margin-bottom: 12px; }
.footer-note {
  font-size: 12px; line-height: 1.9; color: rgba(154, 179, 168, .78);
  border-left: 2px solid var(--line-600); padding-left: 11px; max-width: 42ch;
}
.footer-col-title {
  display: flex; align-items: center; gap: 8px; margin-bottom: 14px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .18em; color: var(--paper);
}
.col-idx { font-size: 11px; color: var(--orange); letter-spacing: .1em; }
.footer-links li + li { margin-top: 9px; }
.footer-links a { font-size: 14px; color: var(--mute); }
.footer-links a::before {
  content: ""; display: inline-block; width: 6px; height: 1px;
  background: var(--line-600); margin-right: 9px; vertical-align: middle;
}
.footer-links a:hover { color: var(--cyan); }
.footer-links a:hover::before { background: var(--cyan); }
.footer-base {
  display: flex; flex-wrap: wrap; gap: 12px 28px;
  align-items: baseline; justify-content: space-between;
  margin-top: 38px; padding-top: 18px; border-top: 1px solid var(--line-faint);
}
.footer-contact {
  margin: 0; max-width: 760px;
  font-family: var(--font-mono); font-size: 12px; line-height: 1.9;
  letter-spacing: .02em; color: var(--mute);
}
.footer-meta { display: flex; flex-wrap: wrap; gap: 18px; margin: 0; font-family: var(--font-mono); font-size: 12px; }
.footer-legal { color: var(--mute); }
.footer-copy { color: rgba(154, 179, 168, .7); }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1180px) {
  .nav-hint { display: none; }
  .brand-badge { display: none; }
  .header-status { display: none; }
  .nav-link { padding: 9px 8px; font-size: 13.5px; }
  .nav-cta { padding-left: 10px; }
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (min-width: 1181px) {
  .header-status { display: inline-flex; opacity: 0; transform: translateY(-3px); transition: opacity 200ms var(--ease), transform 200ms var(--ease); }
  .site-header[data-scrolled="true"] .header-status { opacity: 1; transform: none; }
}

@media (max-width: 1024px) {
  :root { --header-h: 68px; --pad: 18px; }
  .nav-toggle { display: inline-flex; margin-left: auto; }
  .site-nav {
    position: fixed; left: 0; right: 0; top: 0; bottom: 0; z-index: 70;
    display: block; margin: 0;
    padding: calc(var(--header-h) + 20px) var(--pad) 40px;
    background: linear-gradient(180deg, rgba(6, 17, 13, .99), rgba(11, 31, 26, .99));
    border-top: 1px solid var(--line-soft);
    overflow-y: auto; overscroll-behavior: contain;
    opacity: 0; visibility: hidden; transform: translateY(-10px); pointer-events: none;
    transition: opacity 200ms var(--ease), transform 200ms var(--ease), visibility 200ms linear;
  }
  .site-nav[data-open="true"] {
    opacity: 1; visibility: visible; transform: none; pointer-events: auto;
  }
  .nav-list { display: block; }
  .nav-item { display: block; }
  .nav-link {
    display: grid; grid-template-columns: 34px 1fr; gap: 3px 10px;
    align-items: baseline; padding: 14px 8px; border-radius: 0;
    border-bottom: 1px solid var(--line-faint);
    font-size: 16px; color: var(--paper); background: none;
  }
  .nav-link:hover, .nav-link:focus-visible { background: rgba(53, 231, 208, .06); }
  .nav-link::after { display: none; }
  .nav-idx { font-size: 12px; color: var(--cyan); opacity: .85; padding-top: 5px; }
  .nav-label { font-family: var(--font-serif); font-size: 19px; font-weight: 600; letter-spacing: .02em; }
  .nav-hint {
    position: static; grid-column: 2; display: block;
    padding: 0; border: 0; background: none; box-shadow: none;
    opacity: 1; transform: none; white-space: normal;
    font-size: 13px; line-height: 1.7; color: var(--mute);
  }
  .nav-cta {
    display: flex; flex-direction: column; gap: 10px;
    padding: 22px 8px 0; border-left: 0;
  }
  .nav-cta .btn { width: 100%; padding: 14px 18px; }
  .split { grid-template-columns: 1fr; }
  .section-rail { position: static; flex-direction: row; flex-wrap: wrap; gap: 10px; }
  .section-rail a { border-left: 0; border-bottom: 1px solid var(--line-faint); padding: 4px 2px; }
  .section-rail a.is-active { padding-left: 2px; border-bottom-color: var(--cyan); }
}

@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .header-inner { gap: 12px; }
  .brand-mark { width: 34px; height: 34px; font-size: 17px; }
  .brand-name { font-size: 18px; }
  .brand-sub { display: none; }
  .section { padding: 52px 0; }
  .page-head { padding: 36px 0 26px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-base { flex-direction: column; align-items: flex-start; gap: 12px; }
  .score-value { font-size: 38px; }
  .strip-item { min-width: 200px; }
}

/* =========================================================
   动效偏好
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .nav-hint { transition: none; }
  .progress-fill { transition: none; }
}