/* ==========================================================================
   bsport体育入口 — 共享样式表 /assets/site.css
   深夜赛场数据台：墨绿基底 · 荧光青柠读数 · 信号橙轨迹 · 红黄仅限判罚
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root{
  --ink:#0B1F1A;
  --panel:#12302A;
  --lime:#C6FF3D;
  --lime-soft:rgba(198,255,61,.12);
  --lime-line:rgba(198,255,61,.32);
  --orange:#FF7A2F;
  --orange-soft:rgba(255,122,47,.14);
  --red:#E5484D;
  --yellow:#FFD233;
  --paper:#F2F7F4;
  --muted:#8FA79C;
  --line:#1F4438;
  --deep:#07120F;

  --shell:1200px;
  --gutter:clamp(16px,4vw,40px);
  --pill:999px;
  --cut:18px;
  --cut-sm:12px;

  --font-display:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-body:var(--font-display);
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:400ms;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:104px;
  background:var(--ink);
}
body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img,svg,video{max-width:100%; display:block}
a{color:inherit}
button{font:inherit}
ul,ol{margin:0; padding:0; list-style:none}
dl,dd,dt{margin:0}
h1,h2,h3,h4{margin:0; font-weight:800; letter-spacing:-.02em; line-height:1.15; font-stretch:condensed}
p{margin:0 0 1.05em}
p:last-child{margin-bottom:0}
strong{font-weight:700}
hr{border:0; border-top:1px solid var(--line); margin:32px 0}

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

/* ---------- 3. 排版 ---------- */
.display,
.page-title{
  font-size:clamp(40px,7vw,96px);
  font-weight:800;
  font-stretch:condensed;
  letter-spacing:-.02em;
  line-height:1.02;
  margin:0 0 .4em;
}
.page-title .accent{color:var(--lime)}
.section__title{
  font-size:clamp(26px,3.4vw,44px);
  font-weight:800;
  letter-spacing:-.02em;
  margin:0 0 .35em;
}
.section__desc{
  color:var(--muted);
  font-size:16px;
  max-width:38em;
  margin:0;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--muted);
  margin:0 0 14px;
}
.eyebrow::before{
  content:"";
  width:26px; height:2px;
  background:var(--orange);
  display:inline-block;
}
.caption,
.note{
  font-size:12.5px;
  letter-spacing:.08em;
  color:var(--muted);
  line-height:1.7;
}
.prose{max-width:38em}
.prose h2{font-size:clamp(22px,2.6vw,32px); margin:1.6em 0 .5em}
.prose h3{font-size:19px; margin:1.4em 0 .4em}
.prose ul{list-style:none; padding-left:0; margin:0 0 1.1em}
.prose ul li{position:relative; padding-left:20px; margin-bottom:.5em}
.prose ul li::before{
  content:"";
  position:absolute; left:0; top:.72em;
  width:8px; height:2px; background:var(--lime);
}
.prose blockquote{
  margin:1.4em 0;
  padding:14px 20px;
  border-left:3px solid var(--lime);
  background:rgba(198,255,61,.05);
  color:var(--paper);
}
.prose a{color:var(--lime); text-underline-offset:3px}

/* ---------- 4. 布局容器与网格 ---------- */
.shell{
  width:min(var(--shell),100% - var(--gutter) * 2);
  margin-inline:auto;
}
.section{padding:clamp(48px,7vw,88px) 0; position:relative}
.section__head{margin-bottom:clamp(24px,3.5vw,40px)}
.section--tight{padding-top:clamp(28px,4vw,48px)}

.grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(14px,1.8vw,24px);
}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-9{grid-column:span 9}
.col-12{grid-column:span 12}

/* ---------- 5. 切角面板 ---------- */
.panel{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  padding:clamp(18px,2.4vw,26px);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
  transition:transform var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.panel--flat{clip-path:none; border-radius:14px}
.panel--lime{border-color:var(--lime-line); background:linear-gradient(160deg,rgba(198,255,61,.09),rgba(18,48,42,.96))}
a.panel:hover,
.panel--hover:hover{
  transform:translate(2px,-2px);
  border-color:var(--lime-line);
  background:#163A32;
}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 24px;
  font-size:14.5px;
  font-weight:800;
  letter-spacing:.06em;
  text-decoration:none;
  border:0;
  cursor:pointer;
  background:transparent;
  color:var(--paper);
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  transition:transform 200ms var(--ease), background 200ms var(--ease), color 200ms var(--ease), box-shadow 200ms var(--ease);
}
.btn--primary{background:var(--lime); color:var(--deep)}
.btn--primary:hover{background:#D8FF6E; transform:translate(2px,-2px)}
.btn--ghost{box-shadow:inset 0 0 0 1px var(--line)}
.btn--ghost:hover{box-shadow:inset 0 0 0 1px var(--lime-line); color:var(--lime); transform:translate(2px,-2px)}
.btn--orange{background:var(--orange); color:var(--deep)}
.btn--orange:hover{background:#FF9155; transform:translate(2px,-2px)}
.btn__arrow{font-family:var(--font-mono); font-size:15px; line-height:1}

/* ---------- 7. 面包屑 ---------- */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:9px;
  font-size:11.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted);
  margin:0 0 22px;
}
.breadcrumbs__item{display:inline-flex; align-items:center; gap:9px}
.breadcrumbs a{color:var(--muted); text-decoration:none; transition:color 180ms ease}
.breadcrumbs a:hover{color:var(--lime)}
.breadcrumbs__sep{color:var(--line); font-family:var(--font-mono)}
.breadcrumbs [aria-current="page"]{color:var(--paper)}

/* ---------- 8. 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:4px 11px;
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.12em;
  text-transform:uppercase;
  border:1px solid var(--line);
  color:var(--muted);
  background:rgba(143,167,156,.06);
}
.tag::before{
  content:"";
  width:6px; height:6px;
  background:currentColor;
  transform:rotate(45deg);
  flex:0 0 auto;
}
.tag--lime{color:var(--lime); border-color:var(--lime-line); background:var(--lime-soft)}
.tag--orange{color:var(--orange); border-color:rgba(255,122,47,.38); background:var(--orange-soft)}
.tag--red{color:var(--red); border-color:rgba(229,72,77,.45); background:rgba(229,72,77,.12)}
.tag--yellow{color:var(--yellow); border-color:rgba(255,210,51,.42); background:rgba(255,210,51,.12)}

/* ---------- 9. 数据块 ---------- */
.stat{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:18px 0 0;
  border-top:2px solid var(--line);
}
.stat--lime{border-top-color:var(--lime)}
.stat--orange{border-top-color:var(--orange)}
.stat__num{
  font-family:var(--font-mono);
  font-size:clamp(38px,6.4vw,86px);
  font-weight:700;
  line-height:.94;
  letter-spacing:-.04em;
  font-variant-numeric:tabular-nums;
  color:var(--lime);
}
.stat--orange .stat__num{color:var(--orange)}
.stat--paper .stat__num{color:var(--paper)}
.stat__unit{
  font-family:var(--font-mono);
  font-size:14px;
  color:var(--muted);
  margin-left:6px;
  letter-spacing:0;
}
.stat__label{
  font-size:12.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
}

/* ---------- 10. 时间坐标轨 ---------- */
.timeline-rail{
  display:none;
  position:fixed;
  left:20px;
  top:0;
  bottom:0;
  width:64px;
  z-index:1;
  pointer-events:none;
}
.rail-line{
  position:absolute;
  left:31px;
  top:120px;
  bottom:80px;
  width:1px;
  background:linear-gradient(180deg,transparent,var(--line) 12%,var(--line) 88%,transparent);
}
.rail-node{
  position:absolute;
  left:26px;
  width:11px; height:11px;
  border:2px solid var(--orange);
  background:var(--ink);
  transform:rotate(45deg);
}
.rail-year{
  position:absolute;
  left:0;
  width:64px;
  text-align:center;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.1em;
  color:var(--muted);
}

/* ---------- 11. 图片容器基类 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  background:linear-gradient(150deg,#12302A 0%,#0B1F1A 70%);
  border:1px solid var(--line);
  aspect-ratio:16 / 9;
  clip-path:polygon(0 0,calc(100% - 22px) 0,100% 22px,100% 100%,22px 100%,0 calc(100% - 22px));
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.88) contrast(1.08) brightness(.92);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(143,167,156,.10) 1px,transparent 1px),
    linear-gradient(90deg,rgba(143,167,156,.10) 1px,transparent 1px);
  background-size:38px 38px;
  pointer-events:none;
}
.media-frame__cap{
  position:absolute;
  left:16px;
  bottom:13px;
  z-index:2;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--muted);
  text-transform:uppercase;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}

/* ---------- 12. 筛选条 ---------- */
.filter-bar{
  display:flex;
  flex-wrap:wrap;
  gap:9px;
  align-items:center;
  padding:12px 14px;
  margin-bottom:26px;
  background:var(--panel);
  border:1px solid var(--line);
  clip-path:polygon(0 0,calc(100% - var(--cut-sm)) 0,100% var(--cut-sm),100% 100%,var(--cut-sm) 100%,0 calc(100% - var(--cut-sm)));
}
.filter-btn{
  padding:8px 16px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--muted);
  background:transparent;
  border:1px solid var(--line);
  border-radius:var(--pill);
  cursor:pointer;
  transition:color 200ms ease, background 200ms ease, border-color 200ms ease;
}
.filter-btn:hover{color:var(--paper); border-color:var(--lime-line)}
.filter-btn.is-active,
.filter-btn[aria-pressed="true"]{
  background:var(--lime);
  border-color:var(--lime);
  color:var(--deep);
}
.filter-bar__count{
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--muted);
}
[data-hidden]{display:none !important}

/* ---------- 13. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  left:16px;
  top:-72px;
  z-index:999;
  padding:12px 22px;
  background:var(--lime);
  color:var(--deep);
  font-weight:800;
  font-size:14px;
  letter-spacing:.08em;
  text-decoration:none;
  border-radius:0 0 12px 12px;
  transition:top 200ms var(--ease);
}
.skip-link:focus{top:0}

/* ---------- 14. 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:300;
  background:linear-gradient(180deg,rgba(7,18,15,.92) 0%,rgba(7,18,15,0) 100%);
  padding-bottom:6px;
}

.header-utility{
  background:var(--deep);
  border-bottom:1px solid var(--line);
  overflow:hidden;
  max-height:44px;
  opacity:1;
  transition:max-height 320ms var(--ease), opacity 240ms var(--ease), border-color 320ms var(--ease);
}
.utility-inner{
  display:flex;
  align-items:center;
  gap:12px;
  height:44px;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--muted);
}
.utility-pulse{
  width:7px; height:7px;
  flex:0 0 auto;
  background:var(--lime);
  box-shadow:0 0 0 0 rgba(198,255,61,.55);
  animation:pulse 2.4s var(--ease) infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(198,255,61,.5)}
  70%{box-shadow:0 0 0 9px rgba(198,255,61,0)}
  100%{box-shadow:0 0 0 0 rgba(198,255,61,0)}
}
.utility-text{
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.utility-meta{
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--line);
  white-space:nowrap;
}

.nav-island{padding:10px var(--gutter) 0}
.nav-island__inner{
  position:relative;
  width:min(var(--shell),100%);
  margin-inline:auto;
  display:flex;
  align-items:center;
  gap:16px;
  padding:8px 10px 8px 16px;
  background:rgba(18,48,42,.9);
  border:1px solid var(--line);
  border-radius:var(--pill);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  transition:padding 320ms var(--ease), border-radius 320ms var(--ease), background 320ms var(--ease), box-shadow 320ms var(--ease);
}
.site-header[data-condensed] .header-utility{
  max-height:0;
  opacity:0;
  border-color:transparent;
}
.site-header[data-condensed] .nav-island__inner{
  background:rgba(11,31,26,.94);
  box-shadow:0 14px 34px rgba(0,0,0,.42);
  padding-top:6px;
  padding-bottom:6px;
}

/* 品牌 */
.brand{
  display:flex;
  align-items:center;
  gap:11px;
  text-decoration:none;
  color:var(--paper);
  flex:0 0 auto;
}
.brand__mark{
  display:grid;
  gap:3px;
  width:30px;
  align-content:center;
  flex:0 0 auto;
}
.brand__bar{
  display:block;
  height:3px;
  border-radius:1px;
  background:var(--lime);
}
.brand__bar:nth-child(1){width:100%}
.brand__bar:nth-child(2){width:58%; background:var(--orange)}
.brand__bar:nth-child(3){width:82%}
.brand__text{display:flex; flex-direction:column; line-height:1.18}
.brand__name{font-size:16px; font-weight:800; letter-spacing:-.01em}
.brand__tag{font-size:10.5px; letter-spacing:.16em; color:var(--muted); text-transform:uppercase}

/* 移动按钮 */
.nav-toggle{
  display:none;
  margin-left:auto;
  align-items:center;
  gap:9px;
  padding:9px 16px;
  background:transparent;
  color:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--pill);
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.16em;
  cursor:pointer;
  transition:border-color 200ms ease, color 200ms ease;
}
.nav-toggle:hover{border-color:var(--lime-line); color:var(--lime)}
.nav-toggle__lines{display:grid; gap:4px; width:18px}
.nav-toggle__lines i{
  display:block;
  height:2px;
  background:var(--lime);
  transition:transform 240ms var(--ease), opacity 200ms ease, width 240ms var(--ease);
}
.nav-toggle__lines i:nth-child(2){width:72%}
.nav-toggle[aria-expanded="true"] .nav-toggle__lines i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__lines i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__lines i:nth-child(3){transform:translateY(-6px) rotate(-45deg); width:100%}

/* 主导航 */
.site-nav{display:flex; align-items:center}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
  flex-wrap:wrap;
}
.site-nav__item{display:block}
.site-nav__link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 14px;
  border-radius:var(--pill);
  font-size:14.5px;
  font-weight:600;
  letter-spacing:.02em;
  color:var(--muted);
  text-decoration:none;
  white-space:nowrap;
  transition:color 200ms ease, background 200ms ease, box-shadow 200ms ease;
}
.site-nav__link::before{
  content:"";
  width:6px; height:6px;
  border-radius:50%;
  background:var(--lime);
  opacity:0;
  transform:scale(.4);
  transition:opacity 200ms ease, transform 200ms ease;
  flex:0 0 auto;
}
.site-nav__link:hover{color:var(--paper); background:rgba(198,255,61,.07)}
.site-nav__link[aria-current="page"]{
  color:var(--lime);
  background:var(--lime-soft);
  box-shadow:inset 0 0 0 1px var(--lime-line);
}
.site-nav__link[aria-current="page"]::before{opacity:1; transform:scale(1)}

/* 导航行动按钮 */
.nav-cta{
  margin-left:auto;
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 18px;
  border-radius:var(--pill);
  background:var(--lime);
  color:var(--deep);
  font-size:13.5px;
  font-weight:800;
  letter-spacing:.06em;
  text-decoration:none;
  transition:transform 200ms var(--ease), box-shadow 200ms var(--ease), background 200ms var(--ease);
}
.nav-cta::after{content:"→"; font-family:var(--font-mono); font-size:14px}
.nav-cta:hover{background:#D8FF6E; transform:translateY(-1px); box-shadow:0 8px 22px rgba(198,255,61,.24)}

/* ---------- 15. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,110px);
  background:var(--deep);
  border-top:1px solid var(--line);
  padding:clamp(44px,6vw,76px) 0 28px;
  overflow:hidden;
}
.footer-glow{
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(520px 260px at 12% 0%,rgba(198,255,61,.10),transparent 70%),
    radial-gradient(420px 240px at 92% 12%,rgba(255,122,47,.10),transparent 72%);
}
.footer-grid{
  position:relative;
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:clamp(22px,3vw,44px);
  padding-bottom:clamp(28px,4vw,46px);
  border-bottom:1px solid var(--line);
}
.footer-brand{display:flex; flex-direction:column; align-items:flex-start; gap:16px}
.footer-brand .brand__tag{color:var(--muted)}
.footer-brand__line{
  margin:0;
  font-size:14px;
  color:var(--muted);
  max-width:24em;
  line-height:1.7;
}
.footer-cta{margin-top:2px}
.footer-col__title{
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--muted);
  margin:0 0 16px;
}
.footer-col__list{display:flex; flex-direction:column; gap:11px}
.footer-link{
  position:relative;
  display:inline-block;
  font-size:15px;
  color:var(--paper);
  text-decoration:none;
  padding-left:0;
  transition:color 200ms ease, padding-left 240ms var(--ease);
}
.footer-link::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  width:0;
  height:1px;
  background:var(--lime);
  transition:width 240ms var(--ease);
}
.footer-link:hover{color:var(--lime); padding-left:14px}
.footer-link:hover::before{width:10px}

.footer-contact{
  position:relative;
  padding:clamp(22px,3vw,34px) 0;
  border-bottom:1px solid var(--line);
}
.contact-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(14px,2vw,28px);
  margin-bottom:18px;
}
.contact-item{
  border-left:2px solid var(--line);
  padding-left:14px;
}
.contact-item__key{
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
  margin-bottom:5px;
}
.contact-item__val{
  font-family:var(--font-mono);
  font-size:14.5px;
  color:var(--paper);
  letter-spacing:.01em;
  word-break:break-word;
}
.footer-note{
  margin:0;
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--muted);
  max-width:52em;
  line-height:1.75;
}

.footer-bottom{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding-top:22px;
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--muted);
}
.footer-icp,
.footer-copy{font-family:var(--font-mono); font-size:12px}
.footer-icp::before{
  content:"";
  display:inline-block;
  width:6px; height:6px;
  background:var(--orange);
  transform:rotate(45deg);
  margin-right:9px;
  vertical-align:1px;
}

/* ---------- 16. 显现动效 ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity 560ms var(--ease), transform 560ms var(--ease);
}
.js [data-reveal].is-visible{opacity:1; transform:none}

[data-progress]{
  position:fixed;
  top:0;
  left:0;
  height:2px;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--lime),var(--orange));
  z-index:400;
  pointer-events:none;
  transition:transform 400ms var(--ease);
}

/* ---------- 17. 平板 ---------- */
@media (max-width:1100px){
  .nav-cta{display:none}
  .site-nav__link{padding:9px 11px; font-size:14px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;}
  .footer-grid .footer-col:last-child{grid-column:span 3;}
  .footer-grid .footer-col:last-child .footer-col__list{flex-direction:row; flex-wrap:wrap; gap:18px}
}
@media (max-width:960px){
  body{font-size:16px}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    top:calc(100% + 10px);
    left:10px;
    right:10px;
    display:block;
    padding:10px;
    background:rgba(18,48,42,.98);
    border:1px solid var(--line);
    border-radius:20px;
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    box-shadow:0 22px 44px rgba(0,0,0,.5);
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:opacity 240ms var(--ease), transform 240ms var(--ease), visibility 240ms;
  }
  .site-header[data-open] .site-nav{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
  }
  .site-nav__list{flex-direction:column; align-items:stretch; gap:4px}
  .site-nav__link{
    width:100%;
    padding:14px 16px;
    border-radius:14px;
    font-size:16px;
    justify-content:flex-start;
  }
  .site-nav__link[aria-current="page"]{box-shadow:inset 0 0 0 1px var(--lime-line)}
  .utility-meta{display:none}
  .contact-grid{grid-template-columns:1fr; gap:16px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-grid .footer-col:last-child{grid-column:span 2}
  .footer-grid .footer-col:last-child .footer-col__list{flex-direction:column}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9{grid-column:span 12}
  .grid{gap:16px}
}

/* ---------- 18. 手机 ---------- */
@media (max-width:640px){
  :root{--gutter:16px}
  .header-utility{max-height:40px}
  .utility-inner{height:40px; font-size:11px}
  .utility-text{white-space:normal; line-height:1.35; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical}
  .nav-island{padding-top:8px}
  .nav-island__inner{padding:7px 8px 7px 13px; gap:10px}
  .brand__name{font-size:14.5px}
  .brand__tag{font-size:9.5px; letter-spacing:.1em}
  .brand__mark{width:24px}
  .nav-toggle{padding:8px 13px; font-size:11.5px}
  .footer-grid{grid-template-columns:1fr}
  .footer-grid .footer-col:last-child{grid-column:span 1}
  .footer-bottom{flex-direction:column; align-items:flex-start; gap:10px}
  .media-frame--tall{aspect-ratio:3 / 4}
}

/* ---------- 19. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .js [data-reveal]{opacity:1; transform:none}
  [data-progress]{transition:none}
  .utility-pulse{animation:none}
  a.panel:hover,.panel--hover:hover,.btn:hover{transform:none}
}

/* ---------- 20. 宽屏坐标轨 ---------- */
@media (min-width:1360px){
  .timeline-rail{display:block}
}