/* ============================================================
   半岛体育 · 共享外壳样式 /assets/site.css
   1 重置  2 变量  3 基础与中文排版  4 布局与通用组件
   5 头部框架式导航  6 页脚  7 返回顶部  8 动效降级  9 响应式
   ============================================================ */

/* ---------- 1 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{max-width:100%;display:block}
button{font:inherit;color:inherit;background:none;border:0;padding:0}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
:where(a,button,summary,input,[tabindex]):focus-visible{outline:2px solid var(--green);outline-offset:3px}
#main-content{display:block}
#main-content:focus{outline:none}

/* ---------- 2 变量 ---------- */
:root{
  --night:#0A1F44;
  --deep:#061530;
  --panel:#123A7A;
  --orange:#FF6B35;
  --orange-soft:#FF9B73;
  --green:#00E676;
  --mint:#7CF0B8;
  --paper:#F5F7FA;
  --ink:#101418;
  --haze:#8FA3C8;

  --font-display:Impact,"Haettenschweiler","Arial Black","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:Inter,"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --cut-8:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,8px 100%,0 calc(100% - 8px));
  --cut-12:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,12px 100%,0 calc(100% - 12px));
  --cut-18:polygon(0 0,calc(100% - 18px) 0,100% 18px,100% 100%,18px 100%,0 calc(100% - 18px));
  --cut-24:polygon(0 0,calc(100% - 24px) 0,100% 24px,100% 100%,24px 100%,0 calc(100% - 24px));

  --rail-w:224px;
  --topbar-h:64px;
  --shell:1340px;
  --ease:cubic-bezier(.2,.7,.2,1);
}

/* ---------- 3 基础与中文排版 ---------- */
body{
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--paper);
  background:var(--night);
  padding-top:var(--topbar-h);
  overflow-x:hidden;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.02;
  letter-spacing:-.02em;
  text-wrap:balance;
}
.display{font-size:clamp(2.75rem,7vw,6rem);text-transform:uppercase}
.h-section{font-size:clamp(2.25rem,5vw,4.5rem)}
.h-card{font-size:clamp(20px,2.2vw,24px);line-height:1.2}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--orange);text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--orange)}
.lede{font-size:clamp(1.05rem,1.6vw,1.25rem);line-height:1.7;color:rgba(245,247,250,.86);max-width:62ch}
.prose{max-width:68ch;font-size:17px;line-height:1.75}
.prose--narrow{max-width:62ch}
.prose p+p{margin-top:1.1em}
.section--light .lede,.section--light .prose,.panel--paper .prose{color:rgba(16,20,24,.78)}

.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;letter-spacing:0}
.num--lg{font-size:1.6em;line-height:1;color:var(--orange)}
.num--pos{color:var(--green)}
.num--neg{color:var(--orange)}

/* ---------- 4 布局与通用组件 ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:clamp(20px,5vw,64px)}

.section{padding-block:clamp(64px,11vh,152px);position:relative}
.section--tight{padding-block:clamp(40px,6vh,80px)}
.section--light{background:var(--paper);color:var(--ink)}
.section--deep{background:var(--deep)}
.section--tactical::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.06;
  background-image:linear-gradient(rgba(143,163,200,.9) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(143,163,200,.9) 1px,transparent 1px);
  background-size:32px 32px;
}
.section--light.section--tactical::before{
  background-image:linear-gradient(rgba(10,31,68,.9) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(10,31,68,.9) 1px,transparent 1px);
}

.grid{display:grid;gap:clamp(24px,4vw,56px)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}
.grid--aside{grid-template-columns:minmax(0,3fr) minmax(0,9fr)}
.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-12{grid-column:1 / -1}

.rule{height:1px;border:0;background:linear-gradient(90deg,rgba(255,107,53,.9),rgba(0,230,118,.5) 42%,rgba(143,163,200,.18) 76%,transparent)}
.rule--dashed{height:0;border-top:1px dashed rgba(143,163,200,.45);background:none}

.panel{
  position:relative;
  background:var(--panel);
  color:var(--paper);
  padding:clamp(20px,3vw,34px);
  clip-path:var(--cut-18);
}
.panel--paper{background:#fff;color:var(--ink)}
.panel--paper .num--lg{color:#D94E14}
.panel--deep{background:var(--deep)}
.panel--tilt{transform:skewY(-1.2deg)}
.panel--tilt > *{transform:skewY(1.2deg)}

.card{
  position:relative;
  background:rgba(18,58,122,.72);
  padding:clamp(20px,2.6vw,30px);
  clip-path:var(--cut-12);
  border-left:2px solid rgba(255,107,53,.7);
}
.card__title{font-size:clamp(20px,2.2vw,24px);font-family:var(--font-display);line-height:1.18;letter-spacing:-.02em}
.card__meta{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--haze)}

.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:clamp(2rem,4vw,3rem);line-height:1;color:var(--orange)}
.stat__label{font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--haze)}

.tag{
  display:inline-block;padding:4px 10px;font-size:12px;font-weight:600;letter-spacing:.06em;
  background:rgba(0,230,118,.14);color:var(--green);clip-path:var(--cut-8);
}
.tag--orange{background:rgba(255,107,53,.16);color:var(--orange-soft)}
.tag--paper{background:rgba(10,31,68,.08);color:var(--panel)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:12px 22px;font-size:14px;font-weight:600;letter-spacing:.04em;line-height:1;
  cursor:pointer;clip-path:var(--cut-12);border:1px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn--primary{background:var(--orange);color:#061530}
.btn--primary:hover{background:var(--orange-soft)}
.btn--ghost{border-color:rgba(143,163,200,.5);color:var(--paper)}
.btn--ghost:hover{border-color:var(--orange);color:var(--orange)}
.btn--green{background:var(--green);color:#04240f}
.btn--green:hover{background:var(--mint)}
.btn--sm{padding:9px 16px;font-size:13px}
.btn--block{width:100%}

.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;letter-spacing:.04em;color:var(--haze)}
.crumbs__link{border-bottom:1px solid rgba(143,163,200,.4);transition:color .2s var(--ease),border-color .2s var(--ease)}
.crumbs__link:hover{color:var(--orange);border-color:var(--orange)}
.crumbs__sep{color:rgba(143,163,200,.55)}
.crumbs [aria-current="page"]{color:var(--orange)}

.disclosure{border-top:1px solid rgba(143,163,200,.28)}
.disclosure__summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 0;cursor:pointer;font-weight:600;list-style:none;
}
.disclosure__summary::-webkit-details-marker{display:none}
.disclosure__summary::after{content:"+";font-family:var(--font-mono);color:var(--orange);font-size:18px}
.disclosure[open] .disclosure__summary::after{content:"–"}
.disclosure__body{padding-bottom:18px;font-size:15px;line-height:1.75;color:rgba(245,247,250,.8)}

.toc{position:sticky;top:calc(var(--topbar-h) + 32px);display:flex;flex-direction:column}
.toc__title{font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--orange);margin-bottom:12px}
.toc__link{
  display:block;padding:8px 0 8px 14px;font-size:14px;line-height:1.5;
  border-left:1px solid rgba(143,163,200,.3);color:var(--haze);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.toc__link:hover{color:var(--paper)}
.toc__link[aria-current="true"]{color:var(--orange);border-left-color:var(--orange)}

.figure{margin:0}
.figure__media{
  position:relative;overflow:hidden;aspect-ratio:16 / 10;
  background:linear-gradient(140deg,var(--panel),var(--deep));
  clip-path:var(--cut-24);
}
.figure__media img{width:100%;height:100%;object-fit:cover;filter:saturate(.7) contrast(1.05)}
.figure__media--wide{aspect-ratio:21 / 9}
.figure__media--tall{aspect-ratio:3 / 4}
.figure__media--square{aspect-ratio:1 / 1}
.figure__caption{margin-top:12px;font-size:13px;line-height:1.6;color:var(--haze);letter-spacing:.02em}
.figure__badge{
  position:absolute;left:16px;bottom:16px;padding:5px 12px;
  background:rgba(6,21,48,.86);color:var(--green);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  clip-path:var(--cut-8);
}

.data-table{font-size:14px}
.data-table th,.data-table td{padding:12px 14px;text-align:left;border-bottom:1px solid rgba(143,163,200,.22)}
.data-table th{font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--haze);background:var(--panel)}
.data-table td{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.data-table td:first-child{font-family:var(--font-body)}

/* 显现与描边 */
html.js [data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .42s var(--ease),transform .42s var(--ease)}
html.js [data-reveal].is-in{opacity:1;transform:none}
[data-trace] path,[data-trace] line,[data-trace] polyline,[data-trace] circle,[data-trace] ellipse{
  transition:stroke-dashoffset 1.2s var(--ease);
}

/* ---------- 5 头部：框架式导航 ---------- */
.site-header{position:fixed;inset:0;z-index:80;pointer-events:none}
.site-header > *{pointer-events:auto}

.skip-link{
  position:fixed;top:10px;left:10px;z-index:120;
  transform:translateY(-220%);
  padding:10px 18px;font-size:14px;font-weight:600;
  background:var(--orange);color:#061530;clip-path:var(--cut-12);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:none}

/* 左竖轨 */
.rail{
  position:absolute;top:0;left:0;bottom:0;width:var(--rail-w);
  display:none;flex-direction:column;
  padding:22px 0 26px;
  background:linear-gradient(180deg,var(--deep) 0%,var(--night) 58%,var(--deep) 100%);
  border-right:1px solid rgba(143,163,200,.2);
}
.rail::after{
  content:"";position:absolute;top:0;right:-1px;width:2px;height:42%;
  background:linear-gradient(180deg,var(--orange),rgba(0,230,118,.55) 70%,transparent);
}
.brand{display:flex;align-items:center;gap:12px}
.brand--rail{padding:0 22px}
.brand--top{gap:9px;padding:0}
.brand__mark{
  display:grid;place-items:center;flex:0 0 auto;
  width:38px;height:38px;
  background:var(--orange);color:#061530;
  font-family:var(--font-display);font-size:20px;line-height:1;
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
}
.brand--top .brand__mark{width:28px;height:28px;font-size:15px}
.brand__text{display:flex;flex-direction:column;gap:3px;min-width:0}
.brand__name{font-family:var(--font-display);font-size:19px;line-height:1;letter-spacing:.02em;color:#fff}
.brand--top .brand__name{font-size:15px}
.brand__sub{font-size:11px;line-height:1;letter-spacing:.08em;color:var(--haze)}

.rail__nav{flex:1 1 auto;overflow-y:auto;padding:8px 0}
.rail__aside{
  display:flex;flex-direction:column;gap:8px;
  margin-top:auto;padding:18px 22px 0;
  border-top:1px solid rgba(143,163,200,.18);
}
.util-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 10px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;
  color:var(--haze);background:rgba(18,58,122,.6);clip-path:var(--cut-8);
}
.util-chip::before{content:"";width:6px;height:6px;flex:0 0 auto;background:var(--green);clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%)}

.nav-list{display:flex;flex-direction:column}
.nav-list--drawer{width:100%}
.rail__nav .nav-list{counter-reset:nav}
.rail__nav .nav-list__item{counter-increment:nav}
.nav-link{
  position:relative;display:flex;align-items:center;gap:10px;
  padding:13px 22px 13px 26px;
  font-size:14.5px;font-weight:500;letter-spacing:.02em;line-height:1.3;
  color:rgba(245,247,250,.78);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link:hover{color:#fff;background:rgba(255,107,53,.1)}
.rail__nav .nav-link::after{
  content:"0" counter(nav);margin-left:auto;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;
  color:rgba(143,163,200,.7);
}
.nav-link[aria-current="page"]{color:#fff;background:linear-gradient(90deg,rgba(255,107,53,.24),rgba(255,107,53,0) 86%)}
.nav-link[aria-current="page"]::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:5px;
  background:var(--orange);clip-path:polygon(0 0,100% 0,100% 62%,0 100%);
}
.nav-link[aria-current="page"]::after{color:var(--orange)}

/* 顶部横条 */
.topbar{
  position:absolute;top:0;left:0;right:0;height:var(--topbar-h);
  display:flex;align-items:center;gap:16px;
  padding:0 clamp(16px,4vw,40px);
  background:rgba(6,21,48,.9);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
}
.topbar::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,var(--orange),rgba(0,230,118,.55) 42%,rgba(143,163,200,.18) 78%,transparent);
}
.topbar__rule{display:none;width:1px;height:22px;background:rgba(143,163,200,.35)}
.topbar__sub{display:none;font-size:12px;letter-spacing:.08em;color:var(--haze)}
.topbar__actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.topbar__cta{display:none}
.util-chip--top{display:none}

.nav-toggle{
  display:inline-flex;align-items:center;gap:9px;
  padding:9px 14px;font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--paper);background:rgba(18,58,122,.55);
  border:1px solid rgba(143,163,200,.42);cursor:pointer;clip-path:var(--cut-12);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.nav-toggle__bars{position:relative;display:block;width:16px;height:2px;background:currentColor}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:currentColor;
  transition:transform .2s var(--ease),background .2s var(--ease);
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.nav-toggle[aria-expanded="true"]{color:var(--orange);border-color:var(--orange)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{background:currentColor;transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{background:currentColor;transform:translateY(-5px) rotate(-45deg)}

/* 顶部滑出的抽屉 */
.nav-drawer{
  position:absolute;top:var(--topbar-h);left:0;right:0;
  max-height:calc(100vh - var(--topbar-h));overflow-y:auto;
  padding:10px 0 22px;
  background:linear-gradient(180deg,var(--deep),var(--night));
  border-bottom:1px solid rgba(255,107,53,.4);
  transform:translateY(-14px);opacity:0;visibility:hidden;
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s var(--ease);
}
.nav-drawer[data-open="true"]{transform:none;opacity:1;visibility:visible}
.drawer__nav .nav-link{padding:15px clamp(16px,4vw,40px);font-size:16px}
.drawer__nav .nav-link[aria-current="page"]::before{top:12px;bottom:12px}
.drawer__foot{
  display:flex;flex-direction:column;gap:12px;
  margin-top:12px;padding:18px clamp(16px,4vw,40px) 0;
  border-top:1px solid rgba(143,163,200,.2);
}
.drawer__meta{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--haze)}
html.nav-open{overflow:hidden}

/* ---------- 6 页脚 ---------- */
.site-footer{position:relative;background:var(--deep);color:#D7E1F5;padding-top:clamp(56px,8vh,96px)}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,107,53,.85),rgba(0,230,118,.55),transparent);
}
.footer__inner{
  width:100%;max-width:var(--shell);margin-inline:auto;
  padding:0 clamp(20px,5vw,64px) clamp(44px,6vh,72px);
  display:grid;grid-template-columns:1fr;gap:clamp(30px,4vw,56px);
}
.footer__lead{display:flex;flex-direction:column;gap:10px}
.footer__logo{font-family:var(--font-display);font-size:clamp(1.8rem,3vw,2.4rem);line-height:1;letter-spacing:-.02em;color:#fff}
.footer__tagline{font-size:13px;letter-spacing:.08em;color:var(--orange)}
.footer__lead-note{font-size:13.5px;line-height:1.7;color:var(--haze);max-width:34ch}
.footer__col{display:flex;flex-direction:column;gap:14px}
.footer__col-title{font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--orange)}
.footer__list{display:flex;flex-direction:column;gap:2px}
.footer__link{
  display:inline-block;padding:3px 0;font-size:14px;line-height:1.8;color:#C7D4EE;
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer__link::before{content:"／";margin-right:6px;color:rgba(143,163,200,.55)}
.footer__link:hover{color:var(--orange);transform:translateX(3px)}
.footer__contact{display:flex;flex-direction:column;gap:14px}
.contact-list{display:flex;flex-direction:column;gap:10px}
.contact-list__row{display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px}
.contact-list__k{font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--haze);min-width:64px}
.contact-list__v{font-family:var(--font-mono);font-size:13px;letter-spacing:.02em;color:#E4EBF9}
.copy-btn{
  padding:4px 10px;font-size:12px;letter-spacing:.06em;
  border:1px solid rgba(143,163,200,.45);color:var(--haze);cursor:pointer;
  clip-path:var(--cut-8);transition:color .2s var(--ease),border-color .2s var(--ease);
}
.copy-btn:hover{color:var(--orange);border-color:var(--orange)}
.copy-btn.is-done{color:var(--green);border-color:var(--green)}
.footer__base{
  border-top:1px solid rgba(143,163,200,.18);
  padding:20px clamp(20px,5vw,64px);
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 28px;justify-content:space-between;
  font-size:12.5px;letter-spacing:.02em;color:var(--haze);
}
.footer__legal{font-family:var(--font-mono)}
.footer__signoff{flex:1 1 320px}
.footer__year{font-family:var(--font-mono);color:var(--orange)}

/* ---------- 7 返回顶部 ---------- */
.backtop{
  position:fixed;right:clamp(16px,3vw,34px);bottom:clamp(16px,3vw,34px);z-index:90;
  width:52px;height:52px;display:grid;place-items:center;
  font-family:var(--font-mono);font-size:20px;line-height:1;
  background:var(--orange);color:#061530;cursor:pointer;
  clip-path:polygon(14px 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%,0 14px);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s var(--ease),transform .25s var(--ease),visibility .25s var(--ease),background .2s var(--ease);
}
.backtop.is-visible{opacity:1;visibility:visible;transform:none}
.backtop:hover{background:var(--orange-soft)}

/* ---------- 8 动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  html.js [data-reveal]{opacity:1;transform:none;transition:none}
  [data-trace] path,[data-trace] line,[data-trace] polyline,[data-trace] circle,[data-trace] ellipse{
    transition:none;stroke-dasharray:none !important;stroke-dashoffset:0 !important;
  }
  .btn,.nav-link,.footer__link,.backtop,.copy-btn,.nav-drawer,.skip-link{transition:none}
  .panel--tilt{transform:none}
  .panel--tilt > *{transform:none}
}

/* ---------- 9 响应式 ---------- */
@media (min-width:520px){
  .topbar__cta{display:inline-flex}
}
@media (min-width:720px){
  .footer__inner{grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer__lead{grid-column:1 / -1}
  .footer__contact{grid-column:1 / -1}
  .grid--split,.grid--aside{grid-template-columns:minmax(0,1fr)}
}
@media (min-width:900px){
  .grid--split{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}
  .grid--aside{grid-template-columns:minmax(0,3fr) minmax(0,9fr)}
}
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .rail{display:flex}
  .topbar{left:var(--rail-w)}
  .topbar__rule{display:block}
  .topbar__sub{display:block}
  .nav-toggle{display:none}
  .nav-drawer{display:none}
  .footer__inner{grid-template-columns:1.5fr .9fr .9fr .9fr 1.35fr}
  .footer__lead,.footer__contact{grid-column:auto}
}
@media (min-width:1200px){
  .util-chip--top{display:inline-flex}
}
@media (max-width:899px){
  .grid--12 > [class*="col-"]{grid-column:1 / -1}
}