/* ==========================================================================
   威首页体育 · 官方矩阵 V2.0
   共享样式表 /assets/site.css
   设计语言：夜间球场灯光 · 技术蓝图网格 · 数据脉冲
   ========================================================================== */

/* 1 ---------- 变量 ---------- */
:root{
  --bg:#04211A;
  --panel:#0A2E25;
  --panel-deep:#062A21;
  --line:#16443A;
  --blue:#35E1FF;
  --deep-blue:#0E5A78;
  --orange:#FF7A1A;
  --amber:#FFC55C;
  --indigo:#2B2360;
  --indigo-line:#3F3690;
  --ink:#EAF6F3;
  --muted:#9FB8B2;

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

  --maxw:1240px;
  --gutter:24px;
  --radius:2px;
  --shadow-line:0 1px 0 rgba(0,0,0,.4);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* 2 ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video,canvas{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
main{display:block}
#main-content{scroll-margin-top:96px}

/* 3 ---------- 基础排版 ---------- */
body{
  min-height:100vh;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.62;
  color:var(--ink);
  background-color:var(--bg);
  background-image:
    radial-gradient(900px 520px at 84% -10%, rgba(53,225,255,.09), transparent 62%),
    radial-gradient(760px 460px at 4% 6%, rgba(43,35,96,.30), transparent 60%),
    linear-gradient(to right, rgba(22,68,58,.28) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(22,68,58,.28) 1px, transparent 1px);
  background-size:auto,auto,120px 120px,120px 120px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
@media (min-width:1024px){body{font-size:17px}}

h1,h2,h3,h4,h5{font-weight:800;line-height:1.18;letter-spacing:-.015em}
h1{font-size:clamp(2.4rem,6vw,5.6rem);font-weight:900;letter-spacing:-.03em;line-height:1.05}
h2{font-size:clamp(1.5rem,3.4vw,2.4rem)}
h3{font-size:1.2rem}

a{color:var(--blue);text-decoration:none;text-underline-offset:3px}
a:hover{text-decoration:underline}
p{line-height:1.62}

:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:2px}
::selection{background:var(--blue);color:#04211A}

/* 4 ---------- 工具类 ---------- */
.mono{font-family:var(--font-mono);letter-spacing:.02em}
.muted{color:var(--muted)}
.accent{color:var(--blue)}
.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;
}
.rule{height:1px;border:0;background:var(--line);margin:0}

/* 5 ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;left:14px;top:-70px;z-index:200;
  padding:10px 18px;border-radius:var(--radius);
  background:var(--blue);color:#04211A;font-size:14px;font-weight:700;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:14px;text-decoration:none}

/* 6 ---------- 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(4,33,26,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:saturate(140%) blur(10px);
  -webkit-backdrop-filter:saturate(140%) blur(10px);
}
.site-header__inner{
  position:relative;
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:10px 28px;
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:14px var(--gutter);
}
.scroll-progress{
  position:absolute;left:0;bottom:-1px;z-index:2;
  width:100%;height:2px;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--blue) 0%,var(--amber) 58%,var(--orange) 100%);
  will-change:transform;
}

/* 品牌 */
.brand{grid-column:1;display:flex;align-items:center;gap:10px;min-width:0}
.brand__link{display:inline-flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none}
.brand__link:hover{color:var(--ink);text-decoration:none}
.brand__mark{
  flex:none;width:12px;height:12px;background:var(--blue);
  box-shadow:0 0 0 3px rgba(53,225,255,.16);
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
}
.brand__text{font-size:1.06rem;font-weight:900;letter-spacing:.02em;white-space:nowrap}

/* 标签 */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 8px;border:1px solid var(--line);border-radius:var(--radius);
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.08em;text-transform:uppercase;color:var(--muted);
  white-space:nowrap;
}
.tag--version{background:var(--indigo);border-color:var(--indigo-line);color:#DCE8FF}
.tag--live{background:var(--orange);border-color:var(--orange);color:#04211A}
.tag--amber{border-color:var(--amber);color:var(--amber)}
.tag--blue{border-color:var(--deep-blue);background:rgba(14,90,120,.22);color:var(--blue)}

/* 导航 */
.primary-nav{grid-column:2;justify-self:end}
.primary-nav__list{display:flex;align-items:center;gap:2px}
.primary-nav__item{display:block}
.primary-nav__link{
  position:relative;display:block;
  padding:8px 12px;border-radius:var(--radius);
  font-size:14px;font-weight:500;color:var(--muted);
  white-space:nowrap;text-decoration:none;
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.primary-nav__link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:1px;
  background:var(--blue);transform:scaleX(0);transform-origin:0 50%;
  transition:transform .22s var(--ease);
}
.primary-nav__link:hover{color:var(--ink);background:rgba(14,90,120,.16);text-decoration:none}
.primary-nav__link:hover::after{transform:scaleX(1)}
.primary-nav__link[aria-current="page"]{color:var(--blue);font-weight:700}
.primary-nav__link[aria-current="page"]::after{transform:scaleX(1)}

/* 头部双入口 */
.header-actions{grid-column:3;display:flex;align-items:center;gap:10px}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:9px 16px;border:1px solid transparent;border-radius:var(--radius);
  font-size:14px;font-weight:700;line-height:1.1;letter-spacing:.02em;
  white-space:nowrap;text-decoration:none;cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn:hover{text-decoration:none}
.btn:active{transform:translateY(1px)}
.btn--pulse{background:var(--orange);border-color:var(--orange);color:#04211A}
.btn--pulse:hover{background:#FF9346;border-color:#FF9346;color:#04211A}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--muted)}
.btn--ghost:hover{border-color:var(--deep-blue);background:rgba(14,90,120,.18);color:var(--blue)}
.btn--solid{background:var(--blue);border-color:var(--blue);color:#04211A}
.btn--solid:hover{background:#63EBFF;border-color:#63EBFF;color:#04211A}
.btn--block{width:100%}

/* 移动导航按钮 */
.nav-toggle{
  display:none;grid-column:3;justify-self:end;
  align-items:center;gap:10px;
  padding:9px 12px;border:1px solid var(--line);border-radius:var(--radius);
  color:var(--ink);
  transition:border-color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--deep-blue)}
.nav-toggle__bars{
  display:inline-flex;flex-direction:column;justify-content:space-between;
  width:18px;height:12px;
}
.nav-toggle__bar{
  display:block;width:100%;height:1.5px;background:var(--blue);
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.nav-toggle__label{
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.12em;text-transform:uppercase;color:var(--muted);
}
.site-header[data-open="true"] .nav-toggle__bar:nth-child(1){transform:translateY(5.25px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle__bar:nth-child(2){opacity:0}
.site-header[data-open="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-5.25px) rotate(-45deg)}

/* 7 ---------- 页脚 ---------- */
.site-footer{
  margin-top:clamp(64px,9vw,120px);
  border-top:1px solid var(--line);
  background:
    radial-gradient(760px 340px at 10% 0%, rgba(14,90,120,.22), transparent 62%),
    linear-gradient(180deg,var(--panel-deep) 0%,#03190F 100%);
}
.site-footer__inner{
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding:clamp(40px,6vw,72px) var(--gutter) 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1.35fr;
  gap:clamp(28px,4vw,56px);
  padding-bottom:36px;
  border-bottom:1px solid var(--line);
}
.footer-col{min-width:0}
.footer-title{
  display:flex;align-items:baseline;gap:10px;
  margin-bottom:16px;
  font-size:.95rem;font-weight:800;letter-spacing:.02em;color:var(--ink);
}
.footer-title__index{
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.14em;color:var(--blue);
}
.footer-list{display:flex;flex-direction:column;gap:9px}
.footer-list__item{display:flex}
.footer-list__link{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;color:var(--muted);text-decoration:none;
  transition:color .18s var(--ease);
}
.footer-list__link::before{
  content:"";flex:none;width:12px;height:1px;background:var(--line);
  transition:background-color .18s var(--ease);
}
.footer-list__link:hover{color:var(--ink);text-decoration:none}
.footer-list__link:hover::before{background:var(--blue)}

.footer-contact{display:flex;flex-direction:column;gap:12px}
.footer-contact__row{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 14px}
.footer-contact__label{
  min-width:66px;
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.1em;text-transform:uppercase;color:var(--muted);
}
.footer-contact__value{
  font-family:var(--font-mono);font-size:14px;color:var(--ink);word-break:break-word;
}
.footer-contact__value--text{font-family:var(--font-sans)}
.footer-note{
  margin-top:16px;max-width:44ch;
  font-size:12.5px;line-height:1.6;color:var(--muted);
}
.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 24px;padding-top:22px;
}
.footer-base__brand{font-size:13px;font-weight:700;letter-spacing:.02em;color:var(--ink)}
.footer-base__meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;color:var(--muted);
}
.footer-base__icp{color:var(--muted)}
.footer-base__sep{color:var(--line)}
.footer-base__copy{color:var(--muted)}

/* 8 ---------- 容器与章节 ---------- */
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.container--narrow{max-width:860px}
.section{padding-block:clamp(48px,7vw,96px)}
.section--tight{padding-block:clamp(30px,4vw,56px)}
.section--panel{
  background:linear-gradient(180deg,rgba(10,46,37,.92),rgba(10,46,37,.55));
  border-block:1px solid var(--line);
}
.section__head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px 32px;margin-bottom:32px;padding-bottom:22px;
  border-bottom:1px solid var(--line);
}
.section__index{
  display:block;margin-bottom:10px;
  font-family:var(--font-mono);font-size:12px;font-weight:600;
  letter-spacing:.2em;color:var(--blue);
}
.section__title{font-size:clamp(1.5rem,3.4vw,2.4rem);font-weight:800;letter-spacing:-.02em}
.section__desc{margin-top:10px;max-width:60ch;font-size:15px;color:var(--muted)}
.section__aside{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--muted);
}
.page-header{
  padding-block:clamp(28px,4vw,44px) clamp(22px,3vw,34px);
  border-bottom:1px solid var(--line);
}
.page-header__title{font-size:clamp(2rem,4.6vw,3.4rem);font-weight:900;letter-spacing:-.03em;line-height:1.08}
.page-header__desc{margin-top:14px;max-width:62ch;color:var(--muted)}
.page-header__meta{
  display:block;margin-bottom:14px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--amber);
}
.prose{max-width:70ch}
.prose p+p{margin-top:1.2em}
.prose h2{margin-top:2em;font-size:1.4rem}
.prose h3{margin-top:1.6em;font-size:1.1rem}
.prose ul{margin-top:1em;display:flex;flex-direction:column;gap:.5em}
.prose li{position:relative;padding-left:18px}
.prose li::before{
  content:"";position:absolute;left:0;top:.72em;
  width:8px;height:1px;background:var(--blue);
}

/* 9 ---------- 网格 ---------- */
.grid{display:grid;gap:clamp(16px,2.2vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--7-5{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid--8-4{grid-template-columns:minmax(0,8fr) minmax(0,4fr)}
.grid--sidebar{grid-template-columns:minmax(0,340px) minmax(0,1fr)}

/* 10 ---------- 档案卡 ---------- */
.card{
  position:relative;border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(10,46,37,.95),rgba(6,42,33,.9));
  box-shadow:var(--shadow-line);
  transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.card:hover{border-color:var(--deep-blue);transform:translateY(-2px)}
.card__body{padding:clamp(16px,2vw,22px)}
.card__meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-bottom:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--blue);
}
.card__title{font-size:1.05rem;font-weight:700;line-height:1.35;letter-spacing:-.01em}
.card__title a{color:var(--ink)}
.card__title a:hover{color:var(--blue);text-decoration:none}
.card__desc{margin-top:10px;font-size:14px;color:var(--muted)}
.card__foot{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  margin-top:14px;padding-top:12px;border-top:1px solid var(--line);
  font-family:var(--font-mono);font-size:12px;color:var(--muted);
}

/* 11 ---------- 图片容器 ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;isolation:isolate;
  border:1px solid var(--line);border-radius:var(--radius);
  background-image:linear-gradient(150deg,#07281F,#04211A 60%,#062E24);
}
.media-frame--crosshair{
  background-image:
    linear-gradient(to right,rgba(53,225,255,.16) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(53,225,255,.16) 1px,transparent 1px),
    linear-gradient(150deg,#07281F,#04211A 60%,#062E24);
  background-size:38px 38px,38px 38px,100% 100%;
}
.media-frame img,
.media-frame__img{width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(150deg,rgba(53,225,255,.14),transparent 52%,rgba(255,122,26,.08));
}
.media-frame--plain::after{display:none}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame--21x9{aspect-ratio:21/9}
.media-frame__badge{
  position:absolute;top:10px;left:10px;z-index:2;
  padding:3px 8px;border-radius:var(--radius);
  font-family:var(--font-mono);font-size:11px;font-weight:600;letter-spacing:.08em;
  background:var(--orange);color:#04211A;
}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:10px 12px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:var(--ink);
  background:linear-gradient(180deg,rgba(4,33,26,0),rgba(4,33,26,.88));
}

/* 12 ---------- 标签页 ---------- */
.tabs{
  display:flex;flex-wrap:nowrap;gap:2px;overflow-x:auto;
  border-bottom:1px solid var(--line);
}
.tab{
  flex:0 0 auto;
  padding:10px 16px;border:0;border-bottom:2px solid transparent;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.08em;
  color:var(--muted);
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.tab:hover{color:var(--ink);background:rgba(14,90,120,.14)}
.tab[aria-selected="true"]{
  color:var(--blue);border-bottom-color:var(--blue);background:rgba(14,90,120,.18);
}
.tab:focus-visible{outline-offset:-3px}
.tab-panel{padding-top:22px}
.tab-panel[hidden]{display:none}
.tab-panel:focus{outline:none}

/* 13 ---------- 筛选 chips ---------- */
.chip-group{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  padding:6px 13px;border:1px solid var(--line);border-radius:999px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--muted);
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.chip:hover{color:var(--ink);border-color:var(--deep-blue)}
.chip[aria-pressed="true"],
.chip.is-active{color:var(--ink);background:rgba(14,90,120,.35);border-color:var(--blue)}

/* 14 ---------- 数据卡 ---------- */
.stat{
  padding:16px 18px;border:1px solid var(--line);border-radius:var(--radius);
  background:rgba(10,46,37,.7);
}
.stat__value{
  display:block;
  font-family:var(--font-mono);font-size:clamp(1.5rem,2.6vw,2.1rem);
  font-weight:600;letter-spacing:-.02em;line-height:1.1;color:var(--blue);
}
.stat__label{display:block;margin-top:8px;font-size:12.5px;letter-spacing:.04em;color:var(--muted)}

/* 15 ---------- 时间轴 ---------- */
.timeline{
  position:relative;display:flex;flex-direction:column;
  padding-left:22px;border-left:1px solid var(--line);
}
.timeline__item{position:relative;padding:0 0 22px 20px}
.timeline__item:last-child{padding-bottom:0}
.timeline__item::before{
  content:"";position:absolute;left:-26.5px;top:7px;
  width:9px;height:9px;border-radius:50%;
  background:var(--bg);border:1px solid var(--blue);
  box-shadow:0 0 0 3px rgba(53,225,255,.12);
}
.timeline__item[data-state="live"]::before{
  background:var(--orange);border-color:var(--orange);
  box-shadow:0 0 0 3px rgba(255,122,26,.18);
}
.timeline__time{
  display:block;margin-bottom:5px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--amber);
}
.timeline__title{font-size:15px;font-weight:700;color:var(--ink)}
.timeline__desc{margin-top:4px;font-size:13.5px;color:var(--muted)}

/* 16 ---------- 面包屑 ---------- */
.breadcrumb{padding-block:18px}
.breadcrumb__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--muted);
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__link{color:var(--muted)}
.breadcrumb__link:hover{color:var(--blue);text-decoration:none}
.breadcrumb__sep{color:var(--line)}
.breadcrumb__text{color:var(--ink)}
.breadcrumb__item[aria-current="page"] .breadcrumb__text{color:var(--blue)}

/* 17 ---------- 状态点与文字链接 ---------- */
.status-dot{
  display:inline-block;flex:none;width:7px;height:7px;border-radius:50%;
  background:var(--amber);
}
.status-dot--live{
  background:var(--orange);
  animation:pulse-dot 2.4s ease-in-out infinite;
}
@keyframes pulse-dot{
  0%,100%{opacity:1;box-shadow:0 0 0 0 rgba(255,122,26,.45)}
  50%{opacity:.5;box-shadow:0 0 0 7px rgba(255,122,26,0)}
}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;color:var(--blue);
}
.link-arrow::after{content:"→";transition:transform .18s var(--ease)}
.link-arrow:hover{text-decoration:none}
.link-arrow:hover::after{transform:translateX(4px)}

/* 18 ---------- 显现 ---------- */
html.has-js [data-reveal]{
  opacity:0;transform:translateY(14px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
}
html.has-js [data-reveal].is-visible{opacity:1;transform:none}

/* 19 ---------- 响应式：平板 ---------- */
@media (max-width:980px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--7-5,.grid--8-4,.grid--sidebar{grid-template-columns:minmax(0,1fr)}

  .site-header__inner{grid-template-columns:1fr auto;gap:12px 16px;padding-block:12px}
  .brand{grid-column:1;grid-row:1}
  .nav-toggle{display:inline-flex;grid-column:2;grid-row:1}
  .primary-nav{
    display:none;
    grid-column:1 / -1;grid-row:2;justify-self:stretch;
    margin-top:6px;padding-top:8px;border-top:1px solid var(--line);
  }
  .header-actions{
    display:none;
    grid-column:1 / -1;grid-row:3;
    flex-wrap:wrap;gap:10px;padding-top:4px;
  }
  .site-header[data-open="true"] .primary-nav{display:block}
  .site-header[data-open="true"] .header-actions{display:flex}
  .primary-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .primary-nav__link{
    padding:12px 4px;font-size:15px;border-bottom:1px solid rgba(22,68,58,.5);
  }
  .primary-nav__link::after{display:none}
  .primary-nav__item:last-child .primary-nav__link{border-bottom:0}
  .primary-nav__link[aria-current="page"]{
    padding-left:12px;border-left:2px solid var(--blue);background:rgba(14,90,120,.16);
  }
  body.is-nav-open{overflow:hidden}

  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-col--matrix{grid-column:1 / -1}
  .footer-col--contact{grid-column:1 / -1}
}

/* 20 ---------- 响应式：手机 ---------- */
@media (max-width:640px){
  :root{--gutter:18px}
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-col--matrix,.footer-col--contact{grid-column:auto}
  .footer-base{flex-direction:column;align-items:flex-start}
  .section__head{flex-direction:column;align-items:flex-start}
}
@media (max-width:420px){
  .brand__text{font-size:.98rem}
  .nav-toggle__label{display:none}
  .header-actions .btn{flex:1 1 auto}
}

/* 21 ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.has-js [data-reveal]{opacity:1;transform:none}
  .card:hover{transform:none}
  .link-arrow:hover::after{transform:none}
  .status-dot--live{box-shadow:none;opacity:1}
}