/* =========================================================
   完美体育赛事 · 共享站点样式 /assets/site.css
   深夜球场指挥室：蓝图网格 + 荧光青数据流 + 暖橙版本锚点
   ========================================================= */

:root{
  --ink-900:#04120C;
  --ink-850:#061710;
  --ink-800:#0A2118;
  --ink-700:#103026;
  --cyan:#2FF7D6;
  --cyan-soft:#B9FFF0;
  --orange:#FF8A2B;
  --orange-soft:#FFB067;
  --red:#FF5A5A;
  --grid:#1E4A3C;
  --text:#E6F5EE;
  --text-dim:#9DB8AE;
  --cut:14px;
  --slant:12deg;
  --header-h:84px;
  --shell:min(1240px, 100% - 2.5rem);
  --shell-wide:min(1440px, 100% - 2.5rem);
  --font-head:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-body:var(--font-head);
  --font-num:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono","Courier New",monospace;
  --ease:cubic-bezier(.22,.8,.3,1);
  --shadow-panel:0 28px 60px -34px rgba(0,0,0,.92);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background-color:var(--ink-900);
  background-image:
    radial-gradient(120% 80% at 84% -12%, rgba(47,247,214,.10), transparent 62%),
    radial-gradient(90% 60% at 4% 2%, rgba(255,138,43,.07), transparent 64%);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  text-rendering:optimizeLegibility;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg,video{max-width:100%;display:block;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;}
a{color:var(--cyan);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--cyan-soft);}
p{margin:0 0 1em;}
h1,h2,h3,h4{margin:0 0 .5em;font-family:var(--font-head);font-weight:800;letter-spacing:-.02em;line-height:1.22;font-stretch:condensed;}
h1{font-size:clamp(2.1rem,4.6vw,3rem);}
h2{font-size:clamp(1.5rem,2.6vw,2.2rem);}
h3{font-size:clamp(1.15rem,1.8vw,1.45rem);}
hr{border:0;height:1px;background:var(--grid);margin:2rem 0;}
::selection{background:rgba(47,247,214,.28);color:#fff;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:2px;}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;left:1rem;top:-4rem;z-index:200;
  padding:.6rem 1rem;
  background:var(--cyan);color:#04120C;font-weight:700;font-size:.875rem;
  border-radius:4px;transition:top .2s var(--ease);
}
.skip-link:focus{top:1rem;color:#04120C;}

/* ---------- 通用文本与工具 ---------- */
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:-.01em;}
.eyebrow{
  display:inline-flex;align-items:center;gap:.5rem;margin:0 0 .9rem;
  font-family:var(--font-num);font-size:.75rem;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--cyan);transform:rotate(var(--slant));}
.rule{height:1px;border:0;margin:2.5rem 0;background:linear-gradient(90deg,var(--grid),rgba(30,74,60,0));}
.stack{display:grid;gap:1.25rem;}
.cluster{display:flex;flex-wrap:wrap;align-items:center;gap:.75rem;}
.blueprint-grid{
  background-image:
    linear-gradient(to right, rgba(30,74,60,.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30,74,60,.5) 1px, transparent 1px);
  background-size:56px 56px;
}

/* ---------- 布局容器 ---------- */
.section{width:var(--shell);margin-inline:auto;padding:4.5rem 0;}
.section__head{max-width:52ch;margin-bottom:2.25rem;}
.section__title{margin-bottom:.6rem;}
.section__lead{margin:0;color:var(--text-dim);font-size:1rem;}
.grid{display:grid;gap:1.5rem;}
.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));}
.prose{max-width:34em;}
.prose p{line-height:1.85;color:var(--text);}
.prose h2,.prose h3{margin-top:2rem;}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.25em;color:var(--text);}
.prose li{margin-bottom:.4rem;}
.prose blockquote{
  margin:1.5rem 0;padding:.9rem 1.2rem;
  border-left:3px solid var(--orange);
  background:rgba(255,138,43,.07);color:var(--text);
}
.hero-stage{position:relative;margin-top:calc(var(--header-h) * -1);padding-top:var(--header-h);}

/* ---------- 面包屑 ---------- */
.crumbs{width:var(--shell);margin-inline:auto;padding-top:2rem;}
.crumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:.35rem;font-size:.8125rem;color:var(--text-dim);}
.crumbs__list a{color:var(--text-dim);}
.crumbs__list a:hover{color:var(--cyan);}
.crumbs__list li+li::before{content:"/";margin-right:.35rem;color:var(--grid);}
.crumbs__list [aria-current="page"]{color:var(--text);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.72rem 1.2rem;
  font-size:.875rem;font-weight:700;letter-spacing:.02em;line-height:1.2;
  border:1px solid transparent;border-radius:4px;cursor:pointer;
  white-space:nowrap;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .15s var(--ease);
}
.btn:active{transform:translateY(1px);}
.btn--primary{background:var(--orange);color:#20120A;border-color:var(--orange);}
.btn--primary:hover{background:var(--orange-soft);border-color:var(--orange-soft);color:#20120A;}
.btn--ghost{background:transparent;color:var(--cyan);border-color:rgba(47,247,214,.55);}
.btn--ghost:hover{background:rgba(47,247,214,.12);color:var(--cyan-soft);border-color:var(--cyan);}
.btn--quiet{background:rgba(16,48,38,.6);color:var(--text);border-color:var(--grid);}
.btn--quiet:hover{border-color:var(--cyan);color:var(--cyan-soft);}
.btn--sm{padding:.5rem .85rem;font-size:.8125rem;}
.header-cta{flex:none;}

/* ---------- 面板 / 指标 / 表格 / 标签 ---------- */
.panel{
  position:relative;
  padding:1.5rem;
  background:var(--ink-700);
  border:1px solid var(--grid);
  box-shadow:var(--shadow-panel);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
}
.panel--flush{padding:0;overflow:hidden;}
.panel__head{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;
  gap:.5rem 1rem;margin-bottom:1rem;
  padding-bottom:.75rem;border-bottom:1px dashed var(--grid);
}
.panel__title{margin:0;font-size:1.0625rem;letter-spacing:0;}
.panel__body{color:var(--text-dim);font-size:.9375rem;}

.stat-row{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(9.5rem,1fr));
  gap:1px;background:var(--grid);border:1px solid var(--grid);
}
.stat{background:var(--ink-800);padding:1.15rem 1.25rem;}
.stat__value{
  display:block;
  font-family:var(--font-num);font-weight:700;font-size:clamp(1.6rem,3vw,2.25rem);
  line-height:1.1;letter-spacing:-.02em;color:var(--orange);
}
.stat__label{display:block;margin-top:.35rem;font-size:.8125rem;color:var(--text-dim);}
.stat__note{display:block;margin-top:.2rem;font-size:.75rem;color:rgba(157,184,174,.7);}

.data-table{
  width:100%;border-collapse:collapse;
  font-size:.9375rem;font-variant-numeric:tabular-nums;
}
.data-table caption{
  text-align:left;padding-bottom:.7rem;
  font-size:.78rem;letter-spacing:.1em;color:var(--text-dim);
}
.data-table th,.data-table td{
  padding:.68rem .8rem;text-align:left;
  border-bottom:1px solid rgba(30,74,60,.7);
}
.data-table thead th{
  font-size:.78rem;font-weight:700;letter-spacing:.08em;
  color:var(--cyan);border-bottom-color:var(--grid);white-space:nowrap;
}
.data-table tbody tr:hover{background:rgba(47,247,214,.05);}
.data-table .num{color:var(--text);}

.tag{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.18rem .55rem;
  font-size:.72rem;font-weight:600;letter-spacing:.06em;
  border:1px solid rgba(47,247,214,.4);border-radius:3px;
  color:var(--cyan);background:rgba(47,247,214,.07);
}
.tag--orange{border-color:rgba(255,138,43,.48);color:var(--orange);background:rgba(255,138,43,.09);}
.tag--red{border-color:rgba(255,90,90,.5);color:var(--red);background:rgba(255,90,90,.09);}

.callout{
  padding:1rem 1.25rem;
  border-left:3px solid var(--cyan);
  background:rgba(47,247,214,.06);
  color:var(--text);font-size:.9375rem;
}
.callout--orange{border-left-color:var(--orange);background:rgba(255,138,43,.08);}
.callout p:last-child{margin-bottom:0;}

/* ---------- 图片容器基础规则（页面阶段放 <img>） ---------- */
.figure{margin:0;}
.figure__frame{
  position:relative;overflow:hidden;
  aspect-ratio:16/9;width:100%;
  border:1px solid var(--grid);
  background:
    linear-gradient(128deg, rgba(47,247,214,.14), rgba(4,18,12,.24) 42%, rgba(255,138,43,.13)),
    var(--ink-700);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
}
.figure__frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(30,74,60,.45) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30,74,60,.45) 1px, transparent 1px);
  background-size:44px 44px;opacity:.65;
}
.figure__frame > img{width:100%;height:100%;object-fit:cover;}
.figure__frame--wide{aspect-ratio:21/9;}
.figure__frame--square{aspect-ratio:1/1;}
.figure__frame--tall{aspect-ratio:3/4;}
.figure__caption{margin-top:.7rem;font-size:.8125rem;color:var(--text-dim);}
.figure__badge{
  position:absolute;left:.9rem;bottom:.9rem;z-index:2;
  padding:.2rem .55rem;
  font-family:var(--font-num);font-size:.72rem;font-weight:600;
  background:rgba(4,18,12,.82);color:var(--cyan);
  border:1px solid rgba(47,247,214,.4);border-radius:3px;
  backdrop-filter:blur(6px);
}

/* =========================================================
   页头
   ========================================================= */
.site-header{
  position:sticky;top:0;z-index:80;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header::before{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:linear-gradient(180deg,rgba(4,18,12,.92),rgba(4,18,12,0));
  transition:opacity .3s var(--ease);
}
.site-header[data-scrolled="true"]{
  background:rgba(4,18,12,.95);
  border-bottom-color:var(--grid);
  box-shadow:0 22px 46px -32px rgba(0,0,0,.95);
}
.site-header[data-scrolled="true"]::before{opacity:0;}
.site-header[data-nav-open="true"]{background:rgba(4,18,12,.97);border-bottom-color:var(--grid);}
.site-header[data-nav-open="true"]::before{opacity:0;}

.header-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transform:scaleX(0);transform-origin:left center;
  opacity:0;transition:opacity .3s var(--ease);
}
.site-header[data-scrolled="true"] .header-progress{opacity:1;}

.header-rail{
  width:var(--shell);
  margin-inline:auto;
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;
  gap:.75rem 1.5rem;
  min-height:var(--header-h);
  transition:min-height .3s var(--ease);
}
.site-header[data-scrolled="true"] .header-rail{min-height:64px;}

/* 品牌 */
.brand{display:flex;align-items:center;gap:.65rem;color:var(--text);flex:none;}
.brand:hover{color:var(--text);}
.brand__mark{
  position:relative;flex:none;width:34px;height:34px;
  background:linear-gradient(135deg,var(--cyan),rgba(47,247,214,.22));
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
  transition:filter .2s var(--ease);
}
.brand__mark::after{
  content:"";position:absolute;inset:9px;background:var(--ink-900);
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
}
.brand__mark::before{
  content:"";position:absolute;z-index:2;left:9px;right:9px;top:calc(50% - 1px);height:2px;
  background:var(--cyan);transform:rotate(var(--slant));
}
.brand:hover .brand__mark{filter:brightness(1.2);}
.brand__text{display:grid;gap:1px;}
.brand__name{font-family:var(--font-head);font-size:1.0625rem;font-weight:800;letter-spacing:-.01em;line-height:1.2;}
.brand__tagline{font-size:.7rem;letter-spacing:.1em;color:var(--text-dim);line-height:1.2;}

/* 主导航 */
.site-nav{justify-self:center;}
.site-nav__list{display:flex;align-items:center;gap:.1rem;}
.site-nav__link{
  position:relative;display:block;
  padding:.5rem .7rem;border-radius:4px;
  font-size:.875rem;font-weight:600;letter-spacing:.01em;
  color:rgba(230,245,238,.78);
  transition:color .2s var(--ease),background-color .2s var(--ease);
}
.site-nav__link::after{
  content:"";position:absolute;left:.7rem;right:.7rem;bottom:.22rem;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transform:scaleX(0);transform-origin:left center;
  transition:transform .25s var(--ease);
}
.site-nav__link:hover{color:var(--cyan-soft);background:rgba(47,247,214,.07);}
.site-nav__link:hover::after{transform:scaleX(1);}
.site-nav__link[aria-current="page"]{color:var(--cyan-soft);background:rgba(47,247,214,.08);}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);}

/* 工具区 */
.header-tools{display:flex;align-items:center;gap:.65rem;justify-self:end;}

/* 版本号徽标 */
.version-badge{position:relative;}
.version-badge__trigger{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.42rem .7rem .42rem .6rem;
  font-size:.78rem;font-weight:600;letter-spacing:.02em;
  color:var(--cyan-soft);
  background:rgba(47,247,214,.08);
  border:1px solid rgba(47,247,214,.38);
  border-radius:999px;cursor:pointer;
  transition:background-color .2s var(--ease),border-color .2s var(--ease);
}
.version-badge__trigger:hover{background:rgba(47,247,214,.16);border-color:var(--cyan);}
.version-badge__trigger[aria-expanded="true"]{background:rgba(47,247,214,.2);border-color:var(--cyan);}
.version-badge__pulse{
  width:7px;height:7px;border-radius:50%;flex:none;background:var(--orange);
  animation:pulse-dot 2.6s var(--ease) infinite;
}
@keyframes pulse-dot{
  0%{box-shadow:0 0 0 0 rgba(255,138,43,.55);}
  70%{box-shadow:0 0 0 10px rgba(255,138,43,0);}
  100%{box-shadow:0 0 0 0 rgba(255,138,43,0);}
}
.version-badge__value{font-family:var(--font-num);font-weight:700;color:var(--orange);}
.version-badge__panel{
  display:none;
  position:absolute;top:calc(100% + .6rem);right:0;z-index:90;
  width:min(16rem,calc(100vw - 2.5rem));
  padding:1rem 1.15rem;
  background:var(--ink-800);
  border:1px solid var(--grid);
  box-shadow:var(--shadow-panel);
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,12px 100%,0 calc(100% - 12px));
}
.version-badge__panel[data-open="true"]{display:block;}
.version-badge__panel-title{margin:0;font-size:.72rem;letter-spacing:.12em;color:var(--text-dim);}
.version-badge__panel-value{margin:.25rem 0 0;font-family:var(--font-num);font-size:1.6rem;font-weight:700;color:var(--orange);line-height:1.15;}
.version-badge__panel-meta{margin:.35rem 0 .85rem;font-size:.75rem;color:var(--text-dim);}
.version-badge__panel-meta time{font-family:var(--font-num);color:var(--text);}
.version-badge__panel-link{font-size:.8125rem;font-weight:600;}

/* 汉堡按钮 */
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;flex:none;
  background:rgba(47,247,214,.08);
  border:1px solid rgba(47,247,214,.35);
  border-radius:6px;cursor:pointer;
  transition:background-color .2s var(--ease),border-color .2s var(--ease);
}
.nav-toggle:hover{background:rgba(47,247,214,.16);border-color:var(--cyan);}
.nav-toggle__bars{display:grid;gap:5px;width:18px;}
.nav-toggle__bars span{display:block;height:2px;background:var(--cyan-soft);transition:transform .25s var(--ease),opacity .2s var(--ease);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{
  position:relative;
  margin-top:5.5rem;
  background:linear-gradient(180deg,var(--ink-900) 0%,var(--ink-800) 34%,var(--ink-850) 100%);
  border-top:1px solid var(--grid);
  color:var(--text-dim);
  font-size:.875rem;
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.6;
  background-image:
    linear-gradient(to right, rgba(30,74,60,.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30,74,60,.5) 1px, transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.95),transparent 78%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.95),transparent 78%);
}
.site-footer > *{position:relative;z-index:1;}
.footer-rail{width:var(--shell);margin-inline:auto;padding:3.5rem 0 2.25rem;}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,1.65fr) minmax(0,1.1fr);
  gap:2.5rem 2.25rem;
  padding-bottom:2.5rem;
  border-bottom:1px dashed var(--grid);
}
.footer-brand__link{
  display:inline-block;
  font-family:var(--font-head);font-size:1.15rem;font-weight:800;
  letter-spacing:-.01em;color:var(--text);
}
.footer-brand__link:hover{color:var(--cyan-soft);}
.footer-brand__note{margin:.85rem 0 1rem;max-width:34ch;line-height:1.75;color:var(--text-dim);}
.footer-brand__version{display:flex;align-items:center;gap:.6rem;margin:0;font-size:.8125rem;}
.footer-brand__key{color:rgba(157,184,174,.8);}
.footer-brand__version .num{font-size:1rem;font-weight:700;color:var(--orange);}
.footer-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.5rem;}
.footer-col__title{
  margin:0 0 .9rem;
  font-size:.75rem;font-weight:700;letter-spacing:.16em;
  color:var(--cyan);
}
.footer-col__list{display:grid;gap:.55rem;}
.footer-col__list a{color:var(--text-dim);font-size:.875rem;}
.footer-col__list a:hover{color:var(--cyan-soft);}
.footer-contact__list{margin:0;display:grid;gap:.7rem;}
.footer-contact__item{margin:0;display:grid;gap:.1rem;}
.footer-contact__item dt{font-size:.72rem;letter-spacing:.1em;color:rgba(157,184,174,.72);}
.footer-contact__item dd{margin:0;color:var(--text);}
.footer-contact__item .num{font-size:.8rem;word-break:break-all;}
.footer-contact__note{margin:1.1rem 0 0;line-height:1.7;color:rgba(157,184,174,.85);}
.footer-region{
  margin-top:1.75rem;display:grid;gap:.45rem;
  font-size:.8125rem;line-height:1.75;color:rgba(157,184,174,.9);
}
.footer-region p{margin:0;}
.footer-legal{border-top:1px solid var(--grid);background:rgba(4,18,12,.62);}
.footer-legal__rail{
  width:var(--shell);margin-inline:auto;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:.7rem 1.5rem;padding:1.1rem 0;
}
.footer-legal__copy{margin:0;font-size:.78rem;color:rgba(157,184,174,.82);}
.footer-legal__nav{display:flex;flex-wrap:wrap;gap:1.1rem;}
.footer-legal__nav a{font-size:.8rem;color:var(--text-dim);}
.footer-legal__nav a:hover{color:var(--cyan-soft);}

/* ---------- 进场渐显 ---------- */
html.js-ready [data-reveal]{
  opacity:0;transform:translateY(20px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
html.js-ready [data-reveal].is-visible{opacity:1;transform:none;}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1080px){
  :root{--header-h:72px;}
  .header-rail{grid-template-columns:auto minmax(0,1fr);}
  .nav-toggle{display:inline-flex;}
  .site-nav{
    position:absolute;left:0;right:0;top:100%;
    display:block;
    max-height:0;overflow:hidden;visibility:hidden;
    background:rgba(4,18,12,.98);
    border-top:1px solid var(--grid);
    border-bottom:1px solid var(--grid);
    backdrop-filter:blur(12px);
    transition:max-height .32s var(--ease),visibility .32s var(--ease);
  }
  .site-nav[data-open="true"]{max-height:min(30rem,72vh);overflow-y:auto;visibility:visible;}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0;padding:.5rem 1.25rem 1rem;}
  .site-nav__link{
    padding:.85rem .4rem;font-size:1rem;border-radius:0;
    border-bottom:1px solid rgba(30,74,60,.65);
  }
  .site-nav__link::after{display:none;}
  .site-nav__link[aria-current="page"]{
    color:var(--cyan-soft);
    box-shadow:inset 3px 0 0 var(--cyan);
    padding-left:.85rem;
  }
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:900px){
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr));}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:720px){
  :root{--shell:min(1240px,100% - 2rem);--shell-wide:min(1440px,100% - 2rem);}
  body{font-size:15.5px;}
  .section{padding:3.25rem 0;}
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr);}
  .footer-top{grid-template-columns:minmax(0,1fr);gap:2rem;}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-brand__note{max-width:none;}
  .header-cta{display:none;}
  .version-badge__label{display:none;}
  .footer-legal__rail{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .brand__tagline{display:none;}
  .brand__name{font-size:1rem;}
  .footer-nav{grid-template-columns:minmax(0,1fr);}
  .footer-legal__nav{gap:.8rem;}
}

/* ---------- 降低动态效果 ---------- */
@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.js-ready [data-reveal]{opacity:1;transform:none;}
  .header-progress{transition:none;}
}