/* ==========================================================================
   威体育赛事 · 共享站点套件  /assets/site.css
   夜场赛事指挥中心：暗底 + 路径线 + 堆叠画板 + 数据脉冲
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink:#04100C;
  --panel:#0B1211;
  --slate:#16211F;
  --paper:#F2ECDF;
  --paper-ink:#14110C;
  --cyan:#3BF0CE;
  --orange:#FF6B35;
  --amber:#F5B94A;
  --mist:#A9BDB6;
  --hairline:#1E5A50;

  --rail-w:88px;
  --rail-w-open:248px;
  --topbar-h:64px;

  --r-xl:28px;
  --r-lg:20px;
  --r-md:14px;
  --r-pill:999px;

  --ease:cubic-bezier(.2,.8,.2,1);

  --font-display:"DIN Condensed","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shadow-panel:0 24px 60px rgba(0,0,0,.45);
  --shadow-rail:28px 0 70px rgba(0,0,0,.55);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--topbar-h) + 20px)}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,fieldset{margin:0}
ul[class],ol[class]{list-style:none;padding:0}
img,svg,video{display:block;max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:0}
input,select,textarea{font:inherit;color:inherit}
hr{border:0;border-top:1px solid var(--hairline);margin:0}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100dvh;
  background:
    radial-gradient(1200px 620px at 88% -12%,rgba(59,240,206,.10),transparent 62%),
    radial-gradient(900px 520px at -6% 104%,rgba(255,107,53,.08),transparent 66%),
    var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
/* 扫描线氛围层 */
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(180deg,rgba(242,236,223,.035) 0 1px,transparent 1px 4px);
  opacity:.55;
  mix-blend-mode:screen;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.06;
  letter-spacing:-.02em;
  color:var(--paper);
}
h1,.h1{font-size:clamp(34px,5vw,76px);line-height:1.02}
h2,.h2{font-size:clamp(26px,3.2vw,40px)}
h3,.h3{font-size:clamp(20px,2vw,26px);line-height:1.24}
p{max-width:68ch}
strong,b{font-weight:700;color:var(--paper)}
small{font-size:13px}
::selection{background:var(--cyan);color:var(--ink)}

.skip-link{
  position:fixed;
  top:-140px;
  left:14px;
  z-index:400;
  display:inline-block;
  padding:12px 20px;
  background:var(--cyan);
  color:var(--ink);
  font-weight:700;
  font-size:14px;
  text-decoration:none;
  border-radius:0 0 var(--r-md) var(--r-md);
  transition:top .2s var(--ease);
}
.skip-link:focus{top:0}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:6px;
}

/* ---------- 4. 布局容器 ---------- */
.site-main{
  position:relative;
  z-index:1;
  padding-top:var(--topbar-h);
  min-height:60vh;
}
.wrap{
  width:100%;
  max-width:1440px;
  margin-inline:auto;
  padding-inline:clamp(18px,4vw,40px);
}
.section{position:relative;padding-block:clamp(44px,6vw,88px)}
.section--tight{padding-block:clamp(26px,4vw,52px)}
.stack{display:grid;gap:clamp(16px,2.2vw,28px)}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:1fr}
.grid--3{grid-template-columns:1fr}

/* ---------- 5. 头部轨道 ---------- */
.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:120;
  background:linear-gradient(180deg,var(--panel) 0%,var(--ink) 100%);
  border-bottom:1px solid var(--hairline);
}
.site-header__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  min-height:var(--topbar-h);
  padding:10px 16px;
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:var(--paper);
  min-width:0;
}
.brand__mark{
  flex:0 0 auto;
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  border-radius:var(--r-md);
  background:linear-gradient(150deg,var(--cyan) 0%,#1C8E7C 70%,#0F5A4D 100%);
  color:var(--ink);
  font-family:var(--font-display);
  font-weight:900;
  font-size:22px;
  letter-spacing:-.03em;
  box-shadow:0 0 0 1px rgba(59,240,206,.35),0 10px 26px rgba(59,240,206,.20);
}
.brand__text{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:17px;
  line-height:1.1;
  letter-spacing:.01em;
  white-space:nowrap;
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:10px;
  line-height:1.2;
  letter-spacing:.18em;
  color:var(--mist);
  white-space:nowrap;
}

/* 移动端菜单按钮 */
.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:11px 15px;
  border-radius:var(--r-pill);
  background:var(--slate);
  border:1px solid var(--hairline);
  color:var(--paper);
  font-size:13px;
  font-weight:700;
  letter-spacing:.14em;
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease),background .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  transition:background .2s var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  transition:transform .24s var(--ease),top .24s var(--ease),bottom .24s var(--ease),opacity .2s var(--ease);
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{bottom:-6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{bottom:0;transform:rotate(-45deg)}

/* 移动端抽屉 */
.site-nav{
  position:fixed;
  top:var(--topbar-h);
  left:0;
  right:0;
  bottom:0;
  z-index:110;
  display:flex;
  flex-direction:column;
  gap:20px;
  padding:22px 20px 44px;
  overflow-y:auto;
  overscroll-behavior:contain;
  background:
    radial-gradient(600px 320px at 100% 0,rgba(59,240,206,.10),transparent 60%),
    linear-gradient(180deg,var(--panel) 0%,var(--ink) 78%);
  border-top:1px solid var(--hairline);
  box-shadow:0 30px 60px rgba(0,0,0,.6);
  transform:translateX(-102%);
  opacity:0;
  visibility:hidden;
  transition:transform .32s var(--ease),opacity .24s var(--ease),visibility .32s linear;
}
.site-nav[data-open]{
  transform:translateX(0);
  opacity:1;
  visibility:visible;
}
html.nav-open{overflow:hidden}

.nav-caption{
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.6;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan);
  max-width:none;
}
.nav-list{display:flex;flex-direction:column;gap:4px}
.nav-list__item{margin:0}
.nav-link{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  padding:13px 14px;
  border-radius:var(--r-lg);
  border:1px solid transparent;
  color:var(--paper);
  font-size:15px;
  font-weight:600;
  text-decoration:none;
  transition:background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.nav-link__idx{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1;
  letter-spacing:.06em;
  color:var(--mist);
  transition:color .18s var(--ease);
}
.nav-link__label{white-space:nowrap}
.nav-link:hover{background:var(--slate);border-color:var(--hairline)}
.nav-link:hover .nav-link__idx{color:var(--cyan)}
.nav-link[aria-current="page"]{
  background:rgba(59,240,206,.10);
  border-color:var(--cyan);
  color:var(--paper);
}
.nav-link[aria-current="page"] .nav-link__idx{color:var(--cyan)}
.nav-link[aria-current="page"]::before{
  content:"";
  position:absolute;
  left:-1px;
  top:50%;
  width:3px;
  height:54%;
  transform:translateY(-50%);
  border-radius:0 3px 3px 0;
  background:var(--cyan);
  box-shadow:0 0 12px rgba(59,240,206,.8);
}

.nav-aside{
  display:flex;
  flex-direction:column;
  gap:12px;
  margin-top:auto;
  padding-top:18px;
  border-top:1px dashed var(--hairline);
}
.nav-path{
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.8;
  letter-spacing:.04em;
  color:var(--mist);
  max-width:none;
}
.quick-entry{
  display:inline-flex;
  align-items:center;
  gap:10px;
  align-self:flex-start;
  padding:11px 16px;
  border-radius:var(--r-pill);
  background:rgba(59,240,206,.10);
  border:1px solid var(--cyan);
  color:var(--cyan);
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  text-decoration:none;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.quick-entry:hover{background:rgba(59,240,206,.2);color:var(--paper)}
.quick-entry__dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--orange);
  box-shadow:0 0 0 4px rgba(255,107,53,.18);
  animation:pulse-dot 2.6s var(--ease) infinite;
}
@keyframes pulse-dot{
  0%,100%{box-shadow:0 0 0 4px rgba(255,107,53,.16)}
  50%{box-shadow:0 0 0 9px rgba(255,107,53,0)}
}
.nav-cta{margin-top:4px;width:100%}

/* 滚动进度 */
.rail-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:rgba(30,90,80,.55);
  pointer-events:none;
  overflow:hidden;
}
.rail-progress__fill{
  display:block;
  width:100%;
  height:100%;
  transform:scaleX(var(--p,0));
  transform-origin:left center;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 22px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-family:var(--font-body);
  font-size:15px;
  font-weight:700;
  line-height:1.2;
  letter-spacing:.02em;
  text-decoration:none;
  cursor:pointer;
  transition:transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.btn--signal{
  background:var(--orange);
  color:var(--ink);
  box-shadow:0 10px 26px rgba(255,107,53,.28);
}
.btn--signal:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(255,107,53,.36)}
.btn--ghost{
  background:transparent;
  color:var(--paper);
  border-color:var(--hairline);
}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-1px)}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:clamp(48px,7vw,96px);
  padding-block:clamp(36px,5vw,68px) 26px;
  background:
    radial-gradient(720px 320px at 12% 0,rgba(59,240,206,.07),transparent 62%),
    linear-gradient(180deg,var(--panel) 0%,var(--ink) 100%);
  border-top:1px solid var(--hairline);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  width:clamp(80px,18vw,220px);
  height:3px;
  background:linear-gradient(90deg,var(--cyan),var(--amber),transparent);
}
.footer-top{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(28px,4vw,48px);
}
.footer-brand{display:flex;flex-direction:column;gap:10px}
.footer-brand__link{
  display:inline-flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:var(--paper);
}
.footer-brand__mark{
  display:grid;
  place-items:center;
  width:40px;
  height:40px;
  border-radius:var(--r-md);
  background:linear-gradient(150deg,var(--cyan),#1C8E7C 72%,#0F5A4D);
  color:var(--ink);
  font-family:var(--font-display);
  font-weight:900;
  font-size:20px;
}
.footer-brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:20px;
  letter-spacing:.01em;
}
.footer-brand__tag{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--mist);
  max-width:34ch;
}
.footer-brand__note{
  font-size:14px;
  color:var(--mist);
  max-width:34ch;
}
.footer-path{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 10px;
  margin-top:6px;
}
.footer-path__item{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--paper);
}
.footer-path__item::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(59,240,206,.16);
}
.footer-path__item:not(:last-child)::after{
  content:"";
  width:16px;
  height:1px;
  background:var(--hairline);
}

.footer-cols{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  gap:clamp(20px,3vw,36px);
}
.footer-col{min-width:0}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan);
  margin-bottom:14px;
}
.footer-col__list{display:grid;gap:10px}
.footer-link{
  display:inline-block;
  color:var(--mist);
  font-size:15px;
  line-height:1.5;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-link:hover,.footer-link:focus-visible{color:var(--paper);border-color:var(--cyan)}

.footer-contact{display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.footer-contact__list{display:grid;gap:12px}
.footer-contact__item{display:grid;gap:3px}
.footer-contact__k{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--mist);
}
.footer-contact__v{
  font-family:var(--font-mono);
  font-size:13px;
  line-height:1.6;
  color:var(--paper);
  word-break:break-all;
}
.footer-contact__v--text{
  font-family:var(--font-body);
  font-size:14px;
  word-break:normal;
  color:var(--paper);
  max-width:32ch;
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:10px 24px;
  margin-top:clamp(28px,4vw,44px);
  padding-top:18px;
  border-top:1px solid var(--hairline);
}
.footer-legal,.footer-copy{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mist);
  max-width:none;
}

/* ---------- 8. 通用内容组件 ---------- */
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.6;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.display{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(52px,9vw,148px);
  line-height:.92;
  letter-spacing:-.02em;
  color:var(--paper);
}
.lede{
  font-size:clamp(16px,1.6vw,19px);
  line-height:1.8;
  color:var(--mist);
  max-width:60ch;
}

.panel{
  position:relative;
  padding:clamp(20px,3vw,36px);
  border-radius:var(--r-xl);
  border:1px solid var(--hairline);
  background:var(--panel);
  box-shadow:var(--shadow-panel);
}
.panel--slate{background:var(--slate)}
.panel--paper{
  background:var(--paper);
  color:var(--paper-ink);
  border-color:rgba(20,17,12,.14);
}
.panel--paper h1,.panel--paper h2,.panel--paper h3,.panel--paper h4,.panel--paper strong{color:var(--paper-ink)}
.panel--paper p,.panel--paper li{color:#2B2620}
.panel--paper .eyebrow{color:#0F5A4D}
.panel--tilt{transform:rotate(-1.6deg)}
.panel--tilt:nth-child(even){transform:rotate(1.2deg)}

.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist);
}
.crumb a{color:var(--mist);text-decoration:none;border-bottom:1px solid transparent;transition:color .18s var(--ease),border-color .18s var(--ease)}
.crumb a:hover{color:var(--cyan);border-color:var(--cyan)}
.crumb__sep{color:var(--hairline)}
.crumb [aria-current="page"]{color:var(--paper)}

.chip-row{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 15px;
  border-radius:var(--r-pill);
  border:1px solid var(--hairline);
  background:rgba(22,33,31,.72);
  color:var(--mist);
  font-size:13px;
  font-weight:600;
  line-height:1.2;
  cursor:pointer;
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.chip:hover{color:var(--paper);border-color:var(--cyan)}
.chip[aria-pressed="true"],.chip.is-active{
  background:rgba(59,240,206,.14);
  border-color:var(--cyan);
  color:var(--paper);
}
.tag{
  display:inline-block;
  padding:4px 10px;
  border-radius:8px;
  background:rgba(245,185,74,.14);
  border:1px solid rgba(245,185,74,.34);
  color:var(--amber);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  line-height:1.6;
}

.stat{display:grid;gap:4px}
.stat__num{
  font-family:var(--font-mono);
  font-size:clamp(28px,3.4vw,44px);
  line-height:1.05;
  letter-spacing:-.02em;
  color:var(--amber);
}
.stat__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--mist);
}

/* 图片容器基础规则（页面阶段复用） */
.media-frame{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-xl);
  border:1px solid var(--hairline);
  aspect-ratio:16 / 9;
  background:linear-gradient(150deg,var(--slate) 0%,#071613 62%,var(--ink) 100%);
  isolation:isolate;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:2;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(59,240,206,.12) 1px,transparent 1px),
    linear-gradient(90deg,rgba(59,240,206,.12) 1px,transparent 1px);
  background-size:36px 36px;
  opacity:.45;
  mix-blend-mode:screen;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame__img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.85) contrast(1.06) brightness(.78);
}
.media-frame__cap{
  position:absolute;
  left:14px;
  bottom:12px;
  z-index:3;
  padding:5px 10px;
  border-radius:8px;
  background:rgba(4,16,12,.72);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  line-height:1.5;
}

/* ---------- 9. 可展开内容组 ---------- */
.accordion{display:grid;gap:10px}
.accordion__item{
  border:1px solid var(--hairline);
  border-radius:var(--r-lg);
  background:var(--panel);
  overflow:hidden;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.accordion__item:hover{border-color:rgba(59,240,206,.45)}
.accordion__trigger{
  display:flex;
  width:100%;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:16px 18px;
  background:transparent;
  border:0;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:600;
  line-height:1.45;
  text-align:left;
  cursor:pointer;
}
.accordion__trigger::after{
  content:"+";
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:18px;
  line-height:1;
  color:var(--cyan);
  transition:transform .28s var(--ease);
}
.accordion__trigger[aria-expanded="true"]::after{transform:rotate(45deg)}
.accordion__panel{
  height:0;
  overflow:hidden;
  transition:height .28s var(--ease);
}
.accordion__panel-inner{
  padding:0 18px 18px;
  color:var(--mist);
  font-size:15px;
  line-height:1.75;
  max-width:70ch;
}

/* ---------- 10. 显现动效 ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
}
.js [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 11. 平板 ---------- */
@media (min-width:760px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
}

/* ---------- 12. 桌面端：左侧固定轨道 ---------- */
@media (min-width:960px){
  html{scroll-padding-top:24px}

  .site-header{
    inset:0 auto 0 0;
    width:var(--rail-w);
    height:100dvh;
    border-right:1px solid var(--hairline);
    border-bottom:0;
    background:linear-gradient(180deg,var(--panel) 0%,var(--ink) 64%,var(--ink) 100%);
    transition:width .32s var(--ease),box-shadow .32s var(--ease);
  }
  .site-header:hover,
  .site-header:focus-within{
    width:var(--rail-w-open);
    box-shadow:var(--shadow-rail);
  }
  .site-header__inner{
    flex-direction:column;
    align-items:center;
    justify-content:flex-start;
    gap:20px;
    height:100%;
    padding:22px 10px 20px;
  }
  .site-header:hover .site-header__inner,
  .site-header:focus-within .site-header__inner{align-items:stretch}

  .brand{flex-direction:column;gap:8px;text-align:center}
  .brand__text{
    max-height:0;
    opacity:0;
    overflow:hidden;
    transition:max-height .3s var(--ease),opacity .22s var(--ease);
  }
  .site-header:hover .brand__text,
  .site-header:focus-within .brand__text{max-height:80px;opacity:1}

  .nav-toggle{display:none}

  .site-nav{
    position:static;
    inset:auto;
    transform:none;
    opacity:1;
    visibility:visible;
    display:flex;
    flex-direction:column;
    justify-content:space-between;
    gap:16px;
    flex:1 1 auto;
    min-height:0;
    padding:0;
    background:transparent;
    border:0;
    box-shadow:none;
    overflow-y:auto;
    overflow-x:hidden;
    scrollbar-width:thin;
  }
  html.nav-open{overflow:auto}

  .nav-caption{
    max-height:0;
    opacity:0;
    overflow:hidden;
    white-space:nowrap;
    transition:max-height .3s var(--ease),opacity .2s var(--ease);
  }
  .site-header:hover .nav-caption,
  .site-header:focus-within .nav-caption{max-height:40px;opacity:1}

  .nav-link{
    justify-content:center;
    gap:0;
    padding:11px 0;
    border-radius:var(--r-md);
    transition:background .18s var(--ease),border-color .18s var(--ease),padding .3s var(--ease);
  }
  .nav-link__idx{font-size:11px}
  .nav-link__label{
    max-width:0;
    opacity:0;
    overflow:hidden;
    transition:max-width .3s var(--ease),opacity .22s var(--ease),margin .3s var(--ease);
  }
  .site-header:hover .nav-link,
  .site-header:focus-within .nav-link{justify-content:flex-start;padding-inline:12px}
  .site-header:hover .nav-link__label,
  .site-header:focus-within .nav-link__label{max-width:190px;opacity:1;margin-left:12px}

  .nav-link[aria-current="page"]::before{left:0}

  .nav-aside{
    max-height:0;
    opacity:0;
    overflow:hidden;
    margin-top:0;
    padding-top:0;
    border-top:0;
    transition:max-height .32s var(--ease),opacity .22s var(--ease),padding-top .32s var(--ease);
  }
  .site-header:hover .nav-aside,
  .site-header:focus-within .nav-aside{
    max-height:340px;
    opacity:1;
    padding-top:18px;
    border-top:1px dashed var(--hairline);
  }

  .rail-progress{
    top:0;
    right:0;
    bottom:0;
    left:auto;
    width:2px;
    height:auto;
  }
  .rail-progress__fill{
    transform:scaleY(var(--p,0));
    transform-origin:top center;
    background:linear-gradient(180deg,var(--cyan),var(--amber));
  }

  .site-main{padding-top:0;padding-left:var(--rail-w)}
  .site-footer{padding-left:var(--rail-w)}
  .wrap{padding-inline:clamp(28px,4vw,64px)}

  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer-top{grid-template-columns:1.1fr 1.5fr 1.05fr}
  .footer-brand{grid-column:auto}
}

/* ---------- 13. 大屏 ---------- */
@media (min-width:1280px){
  .display{font-size:clamp(96px,9vw,148px)}
}

/* ---------- 14. 动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .js [data-reveal]{opacity:1;transform:none}
  .quick-entry__dot{animation:none}
  .accordion__panel{transition:none}
}