/* ============================================================
   开元体育官网 · 共享外壳样式  /assets/site.css
   色系：墨场绿夜场底 + 电光青交互 + 奶油纸索引页 + 黄铜展签
   ============================================================ */

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 200px; }
body, h1, h2, h3, h4, p, ul, ol, li, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }
::selection { background: var(--flare); color: var(--ink); }

/* ---------- 变量 ---------- */
:root {
  --field: #0B1F1A;
  --turf: #123A31;
  --turf-lift: #143F35;
  --cyan: #4FE0C4;
  --flare: #FF7A1A;
  --board: #E23B2E;
  --paper: #F3EAD8;
  --ink: #1A1510;
  --chalk: #E9F2EF;
  --brass: #C6A15B;
  --mist: #7E9A93;

  --line: rgba(198, 161, 91, 0.32);
  --line-soft: rgba(198, 161, 91, 0.18);
  --cyan-line: rgba(79, 224, 196, 0.42);

  --shell: 1280px;
  --gap: 24px;
  --rail: 0px;
  --cut: 12px;

  --font-display: "Arial Narrow", "Helvetica Neue Condensed", Impact, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Consolas, "Courier New", monospace;
}

/* ---------- 页面底色 ---------- */
body {
  padding-inline-start: var(--rail);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--field);
  background-image:
    repeating-linear-gradient(90deg, rgba(79, 224, 196, 0.05) 0 1px, transparent 1px 96px),
    radial-gradient(120% 70% at 80% -10%, rgba(79, 224, 196, 0.12), transparent 62%),
    radial-gradient(90% 60% at -10% 110%, rgba(226, 59, 46, 0.11), transparent 60%);
  color: var(--chalk);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
}
main { display: block; flex: 1 0 auto; }

.shell { width: 100%; max-width: var(--shell); margin-inline: auto; padding-inline: clamp(16px, 4vw, 40px); }
.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 ---------- */
.skip-link {
  position: absolute; inset-inline-start: 12px; inset-block-start: -120px; z-index: 95;
  padding: 10px 18px; background: var(--cyan); color: var(--ink);
  font-size: 13px; font-weight: 700; letter-spacing: 0.08em;
  transition: inset-block-start 0.2s ease;
}
.skip-link:focus { inset-block-start: 12px; }

/* ============================================================
   左侧赛程轨道（框架式导航的竖边）
   ============================================================ */
.frame-rail {
  display: none;
  position: fixed; inset-block: 0; inset-inline-start: 0; width: var(--rail); z-index: 70;
  flex-direction: column; align-items: center; justify-content: space-between;
  padding-block: 104px 40px;
  background: linear-gradient(180deg, var(--turf) 0%, var(--field) 74%);
  border-inline-end: 1px solid var(--line);
}
.frame-rail__label {
  writing-mode: vertical-rl; text-orientation: mixed;
  font-size: 11px; letter-spacing: 0.42em; color: var(--brass);
}
.frame-rail__rules {
  flex: 1 1 auto; width: 1px; margin-block: 18px;
  background: repeating-linear-gradient(180deg, var(--line) 0 1px, transparent 1px 12px);
}
.frame-rail__progress {
  position: absolute; inset-block-start: 0; inset-inline-start: 0;
  width: 3px; height: 0;
  background: linear-gradient(180deg, var(--cyan), var(--flare));
  transition: height 0.12s linear;
}

/* ============================================================
   头部
   ============================================================ */
.site-header { position: sticky; top: 0; z-index: 60; }
.site-header::before {
  content: ""; display: block; height: 3px;
  background: linear-gradient(90deg, var(--flare) 0%, var(--brass) 32%, var(--cyan) 62%, rgba(79, 224, 196, 0) 100%);
}

.masthead {
  background: linear-gradient(180deg, var(--turf-lift) 0%, var(--field) 100%);
  border-block-end: 1px solid var(--line);
  transition: background-color 0.25s ease;
}
.masthead__top {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 12px clamp(12px, 2vw, 28px);
  padding-block: 14px;
  transition: padding-block 0.25s ease;
}
.masthead__ident {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 12px clamp(12px, 2vw, 24px);
  flex: 1 1 auto; min-width: 0;
}
.masthead__utility {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
  flex: 0 0 auto; margin-inline-start: auto;
}

/* 品牌署名 */
.brand-mark { display: inline-flex; align-items: center; gap: 12px; min-height: 44px; }
.brand-mark__glyph {
  display: grid; place-items: center; flex: none;
  width: 40px; height: 40px;
  background: var(--flare); color: var(--ink);
  font-family: var(--font-display); font-weight: 900; font-size: 22px; line-height: 1;
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}
.brand-mark__text { display: block; min-width: 0; }
.brand-mark__name {
  display: block; font-family: var(--font-display); font-weight: 900;
  font-size: 20px; line-height: 1.2; letter-spacing: 0.06em; color: var(--chalk);
  transition: color 0.2s ease;
}
.brand-mark__sub { display: block; font-size: 12px; line-height: 1.4; letter-spacing: 0.16em; color: var(--mist); }
.brand-mark:hover .brand-mark__name { color: var(--cyan); }

/* 赛区切换（四城标识） */
.city-rail {
  display: flex; align-items: center; gap: 12px;
  padding-inline-start: 14px; border-inline-start: 1px solid var(--line);
  max-height: 90px; overflow: hidden;
  transition: max-height 0.3s ease, opacity 0.25s ease, padding-inline-start 0.3s ease;
}
.city-rail__title { font-size: 12px; letter-spacing: 0.16em; color: var(--brass); white-space: nowrap; }
.city-rail__list { display: flex; flex-wrap: wrap; gap: 8px; }
.city-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  font-size: 12px; letter-spacing: 0.14em; white-space: nowrap;
  color: var(--chalk);
  border: 1px solid var(--cyan-line);
  background: rgba(79, 224, 196, 0.06);
}
.city-chip::before { content: ""; flex: none; width: 14px; height: 9px; color: var(--cyan); }
.city-chip--sh::before { background: repeating-linear-gradient(90deg, currentColor 0 2px, transparent 2px 5px); }
.city-chip--cd::before { background: repeating-linear-gradient(-6deg, currentColor 0 2px, transparent 2px 5px); }
.city-chip--gz::before {
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, transparent 0 2px, currentColor 2px 4px, transparent 4px 5px, currentColor 5px 7px, transparent 7px);
}
.city-chip--hz::before { background: currentColor; clip-path: polygon(0 100%, 100% 100%, 100% 0); }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 0 18px;
  font-size: 14px; line-height: 1; letter-spacing: 0.1em;
  border: 1px solid transparent; cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.btn--flare {
  background: var(--flare); color: var(--ink); font-weight: 700;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}
.btn--flare:hover { background: #FF9142; }
.btn--ghost { border-color: var(--line); color: var(--chalk); }
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); background: rgba(79, 224, 196, 0.08); }
.btn--cyan { background: var(--cyan); color: var(--ink); font-weight: 700; }
.btn--cyan:hover { background: #77EBD6; }
.btn--paper { background: var(--paper); color: var(--ink); font-weight: 700; }
.btn--paper:hover { background: #FFF7E6; }
.btn--line { border-color: var(--cyan-line); color: var(--cyan); }
.btn--line:hover { background: rgba(79, 224, 196, 0.1); }

/* 移动菜单按钮 */
.nav-toggle {
  display: none; align-items: center; gap: 10px;
  min-height: 44px; padding: 0 14px;
  border: 1px solid var(--line); color: var(--chalk);
  font-size: 12px; letter-spacing: 0.16em; cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle__bars {
  flex: none; width: 18px; height: 12px;
  background: linear-gradient(var(--cyan) 0 2px, transparent 2px 5px, var(--cyan) 5px 7px, transparent 7px 10px, var(--cyan) 10px 12px);
}

/* 主栏目 */
.primary-nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--gap);
  padding-block: 8px;
  border-block-start: 1px solid var(--line-soft);
  transition: padding-block 0.25s ease;
}
.primary-nav__list { display: flex; flex-wrap: wrap; gap: 2px; }
.primary-nav__link {
  position: relative; display: inline-flex; align-items: center;
  min-height: 44px; padding: 0 14px;
  font-size: 14px; letter-spacing: 0.1em; color: var(--chalk);
  border: 1px solid transparent;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}
.primary-nav__link:hover { color: var(--cyan); border-color: var(--cyan-line); background: rgba(79, 224, 196, 0.07); }
.primary-nav__link[aria-current="page"] { color: var(--ink); background: var(--cyan); border-color: var(--cyan); font-weight: 700; }
.primary-nav__link[aria-current="page"]:hover { color: var(--ink); background: var(--cyan); }
.primary-nav__stamp { font-size: 12px; letter-spacing: 0.16em; color: var(--mist); white-space: nowrap; }

/* 比分滚动带 */
.score-tape { background: var(--turf); border-block-end: 1px solid var(--line); }
.score-tape__inner {
  display: flex; align-items: center; gap: 18px;
  min-height: 48px; overflow-x: auto; scrollbar-width: thin;
}
.score-tape__inner::-webkit-scrollbar { height: 4px; }
.score-tape__inner::-webkit-scrollbar-thumb { background: var(--line); }
.score-tape__round {
  display: inline-flex; align-items: center; gap: 8px; flex: none;
  padding-inline-end: 18px; border-inline-end: 1px solid var(--line);
  font-size: 12px; letter-spacing: 0.16em; color: var(--brass); white-space: nowrap;
}
.score-tape__list { display: flex; align-items: center; gap: 22px; flex: none; }
.score-tape__item { display: inline-flex; align-items: center; gap: 10px; font-size: 13px; color: var(--chalk); white-space: nowrap; }
.score-tape__city { color: var(--mist); letter-spacing: 0.1em; }
.score-tape__time { font-family: var(--font-mono); font-size: 14px; letter-spacing: 0.04em; color: var(--cyan); }
.tape-dot {
  flex: none; width: 7px; height: 7px; border-radius: 50%;
  background: var(--flare);
  animation: tape-pulse 2.4s ease-in-out infinite;
}
@keyframes tape-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(255, 122, 26, 0.55); }
  50% { opacity: 0.62; box-shadow: 0 0 0 7px rgba(255, 122, 26, 0); }
}

/* 滚动收窄态 */
.site-header[data-condensed="true"] .masthead { background: #0B1F1A; }
.site-header[data-condensed="true"] .masthead__top { padding-block: 4px; }
.site-header[data-condensed="true"] .primary-nav { padding-block: 0; }
.site-header[data-condensed="true"] .city-rail {
  max-height: 0; opacity: 0; padding-inline-start: 0; border-inline-start-color: transparent;
}

/* 返回顶部 */
.to-top {
  position: fixed; z-index: 65;
  inset-inline-end: clamp(14px, 3vw, 32px);
  inset-block-end: clamp(14px, 3vw, 32px);
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 16px;
  background: var(--paper); color: var(--ink);
  font-size: 12px; font-weight: 700; letter-spacing: 0.16em; cursor: pointer;
  border: 1px solid var(--ink);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease, background-color 0.2s ease;
}
.to-top[data-visible="true"] { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--cyan); }

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  margin-block-start: auto;
  background: linear-gradient(180deg, #0B1F1A 0%, #081714 100%);
  border-block-start: 1px solid var(--line);
}
.footer__grid {
  display: grid;
  grid-template-columns: minmax(240px, 1.5fr) repeat(3, minmax(140px, 1fr));
  gap: clamp(24px, 3vw, 40px);
  padding-block: clamp(40px, 6vw, 64px) clamp(24px, 3vw, 36px);
}
.footer__mark { font-family: var(--font-display); font-weight: 900; font-size: 24px; letter-spacing: 0.06em; color: var(--chalk); }
.footer__closing {
  margin-block-start: 6px;
  font-family: var(--font-display); font-weight: 900;
  font-size: clamp(28px, 4vw, 44px); line-height: 1.1; letter-spacing: 0.04em;
  color: var(--cyan);
}
.footer__note { margin-block-start: 12px; max-width: 34ch; font-size: 14px; color: var(--mist); }
.footer__cities { display: flex; flex-wrap: wrap; gap: 8px; margin-block-start: 16px; }

.footer__col-title {
  padding-block-end: 10px; margin-block-end: 10px;
  border-block-end: 1px solid var(--line-soft);
  font-size: 12px; font-weight: 400; letter-spacing: 0.16em; color: var(--brass);
}
.footer__list { display: flex; flex-direction: column; }
.footer__link {
  display: inline-flex; align-items: center;
  min-height: 44px; font-size: 14px; color: var(--chalk);
  transition: color 0.2s ease;
}
.footer__link::before {
  content: ""; flex: none; width: 0; height: 1px; margin-inline-end: 0;
  background: var(--flare);
  transition: width 0.2s ease, margin-inline-end 0.2s ease;
}
.footer__link:hover { color: var(--cyan); }
.footer__link:hover::before { width: 12px; margin-inline-end: 8px; }

.footer__contact {
  display: flex; flex-wrap: wrap; gap: 8px 32px; justify-content: space-between;
  padding-block: 20px;
  border-block-start: 1px solid var(--line-soft);
}
.footer__contact-line { font-size: 13px; color: var(--chalk); }
.footer__address { font-size: 13px; color: var(--mist); }

.footer__legal {
  display: flex; flex-wrap: wrap; gap: 10px 24px;
  align-items: center; justify-content: space-between;
  padding-block: 10px 28px;
  border-block-start: 1px solid var(--line-soft);
  font-size: 12px; letter-spacing: 0.1em; color: var(--mist);
}
.footer__legal-copy { letter-spacing: 0.1em; }
.footer__legal-links { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 18px; }
.footer__legal-links .footer__link { min-height: 44px; font-size: 12px; letter-spacing: 0.1em; }

/* ============================================================
   页面级通用组件
   ============================================================ */
/* 面包屑 */
.crumbs { padding-block: 20px 4px; }
.crumbs__list { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 12px; letter-spacing: 0.14em; color: var(--mist); }
.crumbs__link { display: inline-flex; align-items: center; min-height: 32px; color: var(--brass); }
.crumbs__link:hover { color: var(--cyan); }
.crumbs__sep { color: var(--line); }
.crumbs__current { color: var(--chalk); }

/* 正文容器 */
.prose { max-width: 720px; font-size: 17px; line-height: 1.75; color: var(--chalk); }
.prose > * + * { margin-block-start: 1.2em; }
.prose h2 { font-family: var(--font-display); font-weight: 900; font-size: 28px; line-height: 1.25; letter-spacing: 0.02em; }
.prose h3 { font-size: 20px; font-weight: 700; letter-spacing: 0.02em; }
.prose a { color: var(--cyan); text-decoration: underline; text-underline-offset: 4px; }
.prose strong { color: #fff; }
.prose--paper { background: var(--paper); color: var(--ink); padding: clamp(20px, 4vw, 40px); }
.prose--paper h2, .prose--paper h3 { color: var(--ink); }
.prose--paper a { color: #0A6350; }
.prose--paper strong { color: var(--ink); }

/* 网格 */
.grid-12 { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: var(--gap); }
.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

/* 面板 */
.panel {
  position: relative;
  padding: clamp(20px, 3vw, 32px);
  background: var(--turf);
  border: 1px solid var(--line);
}
.panel--cut {
  border: 0;
  box-shadow: inset 0 0 0 1px var(--line);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}
.panel--paper { background: var(--paper); color: var(--ink); border-color: rgba(26, 21, 16, 0.2); box-shadow: none; }
.panel--paper .index-tag { color: #8A6A2F; }
.panel--paper .label { color: #6B5B45; }

/* 索引号与标签 */
.index-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.18em; color: var(--brass);
}
.label { font-size: 12px; letter-spacing: 0.16em; color: var(--mist); }

/* 数据切片 */
.stat { display: flex; flex-direction: column; gap: 6px; }
.stat__value {
  font-family: var(--font-mono); font-weight: 700;
  font-size: clamp(44px, 8vw, 72px); line-height: 1; letter-spacing: 0.01em;
  color: var(--chalk);
}
.stat__value--flare { color: var(--flare); }
.stat__value--board { color: var(--board); }
.stat__value--cyan { color: var(--cyan); }
.stat__unit { margin-inline-start: 0.25em; font-size: 0.4em; letter-spacing: 0.06em; color: var(--mist); }
.stat__label { font-size: 12px; letter-spacing: 0.16em; color: var(--mist); }
.stat__spark { display: block; width: 100%; height: 3px; background: linear-gradient(90deg, var(--cyan), rgba(79, 224, 196, 0)); }

/* 筛选 chips */
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex; align-items: center;
  min-height: 40px; padding: 0 14px;
  font-size: 13px; letter-spacing: 0.1em; color: var(--chalk);
  border: 1px solid var(--line); background: transparent; cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}
.chip:hover { border-color: var(--cyan-line); color: var(--cyan); }
.chip[aria-pressed="true"] { background: var(--cyan); color: var(--ink); border-color: var(--cyan); font-weight: 700; }

/* 章节目录 */
.toc { position: relative; padding: 18px 20px; background: var(--paper); color: var(--ink); }
.toc__title {
  padding-block-end: 10px; margin-block-end: 8px;
  border-block-end: 1px solid rgba(26, 21, 16, 0.18);
  font-size: 12px; font-weight: 400; letter-spacing: 0.16em; color: #8A6A2F;
}
.toc__list { display: flex; flex-direction: column; }
.toc__link {
  display: flex; align-items: center; gap: 10px;
  min-height: 44px; padding: 0 10px;
  font-size: 14px; color: var(--ink);
  border-inline-start: 3px solid transparent;
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}
.toc__link:hover { background: rgba(11, 31, 26, 0.07); }
.toc__link[data-active="true"] { background: rgba(79, 224, 196, 0.2); border-inline-start-color: var(--flare); font-weight: 700; }
.toc__num { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em; color: #8A6A2F; }

/* 图片容器 */
.media {
  position: relative; overflow: hidden;
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--turf) 0%, var(--field) 100%);
  border: 1px solid var(--line);
}
.media > img, .media > picture > img { width: 100%; height: 100%; object-fit: cover; }
.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }
.media--cut {
  border: 0;
  box-shadow: inset 0 0 0 1px var(--line);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}
.media__tag {
  position: absolute; z-index: 2;
  inset-block-start: 12px; inset-inline-start: 12px;
  padding: 4px 10px;
  background: rgba(11, 31, 26, 0.84); color: var(--cyan);
  font-size: 12px; letter-spacing: 0.16em;
}
.media__caption { margin-block-start: 10px; font-size: 12px; letter-spacing: 0.12em; color: var(--mist); }
.media:empty::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(to top right, transparent calc(50% - 0.5px), rgba(79, 224, 196, 0.35) calc(50% - 0.5px) calc(50% + 0.5px), transparent calc(50% + 0.5px)),
    linear-gradient(to top left, transparent calc(50% - 0.5px), rgba(198, 161, 91, 0.28) calc(50% - 0.5px) calc(50% + 0.5px), transparent calc(50% + 0.5px));
}

/* 分隔条 */
.rule-brass { height: 1px; border: 0; background: var(--line); }
.slant-rule {
  height: 8px;
  background: repeating-linear-gradient(-6deg, rgba(198, 161, 91, 0.5) 0 2px, transparent 2px 9px);
}

/* 入场显现 */
.has-js [data-reveal] {
  opacity: 0; transform: translateY(12px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  transition-delay: var(--reveal-delay, 0ms);
}
.has-js [data-reveal][data-revealed="true"] { opacity: 1; transform: none; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1100px) {
  .footer__grid { grid-template-columns: minmax(220px, 1.4fr) repeat(3, minmax(120px, 1fr)); }
}

@media (max-width: 1024px) {
  .span-3, .span-4, .span-5 { grid-column: span 6; }
  .span-7, .span-8 { grid-column: span 12; }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 150px; }
  .nav-toggle { display: inline-flex; }
  .primary-nav { display: none; padding-block: 0; }
  .site-header[data-open="true"] .primary-nav {
    display: block;
    padding-block: 6px 18px;
    border-block-start: 1px solid var(--cyan-line);
  }
  .site-header[data-open="true"] .nav-toggle { border-color: var(--cyan); color: var(--cyan); }
  .primary-nav__list { flex-direction: column; gap: 0; }
  .primary-nav__link {
    width: 100%; justify-content: flex-start;
    padding-inline: 4px;
    border-block-end: 1px solid var(--line-soft);
  }
  .primary-nav__link[aria-current="page"] { border-block-end-color: var(--cyan); }
  .primary-nav__stamp { display: none; }
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  html { scroll-padding-top: 130px; }
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .grid-12 > * { grid-column: 1 / -1; }
  .masthead__top { padding-block: 10px; gap: 10px; }
  .masthead__ident { flex: 1 1 100%; }
  .masthead__utility { width: 100%; margin-inline-start: 0; }
  .nav-toggle { margin-inline-start: auto; }
  .city-rail {
    flex: 1 1 100%;
    padding-inline-start: 0; border-inline-start: 0;
  }
  .brand-mark__name { font-size: 18px; }
  .score-tape__inner { gap: 12px; }
  .score-tape__list { gap: 16px; }
  .footer__grid { grid-template-columns: minmax(0, 1fr); }
  .footer__legal { justify-content: flex-start; }
}

/* ---------- 焦点与动效偏好 ---------- */
@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;
  }
  .has-js [data-reveal] { opacity: 1; transform: none; }
  .frame-rail__progress { transition: none; }
}