*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,pre{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video,canvas{display:block;max-width:100%}
img{height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--neon);outline-offset:3px;border-radius:6px}

:root{
  --ink:#0A1522;
  --ink-2:#10212F;
  --jade:#1C4B57;
  --aqua:#4FB6C8;
  --neon:#C8FF4D;
  --heat:#FF6A2B;
  --alert:#FF4D5E;
  --mist:#EDF4F6;
  --slate:#8497A3;
  --grad-from:#2E7C8C;
  --grad-to:#0F2A38;
  --line:rgba(79,182,200,.18);
  --line-soft:rgba(79,182,200,.10);
  --hair:rgba(237,244,246,.08);
  --rail-w:112px;
  --bar-h:76px;
  --r-l:28px;
  --r-m:18px;
  --r-s:12px;
  --pill:999px;
  --ease:cubic-bezier(.22,1,.36,1);
  --font-sans:"PingFang SC","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-narrow:"Oswald","Archivo Narrow","Arial Narrow","PingFang SC",system-ui,sans-serif;
  --font-data:"JetBrains Mono","IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

body{
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  color:var(--mist);
  background-color:var(--ink);
  background-image:
    radial-gradient(115% 58% at 84% -12%,rgba(46,124,140,.26),transparent 62%),
    radial-gradient(72% 46% at 2% 104%,rgba(28,75,87,.40),transparent 60%);
  background-attachment:fixed;
  padding-left:var(--rail-w);
  min-height:100vh;
  letter-spacing:.01em;
  overflow-x:hidden;
}

h1,h2,h3,h4{font-weight:600;line-height:1.22;letter-spacing:-.01em}
strong{font-weight:700}
time,.stat{font-family:var(--font-data);font-variant-numeric:tabular-nums}

#main-content{display:block;position:relative;z-index:1}

/* ---------- 无障碍基础件 ---------- */
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}
.skip-link{
  position:fixed;top:12px;left:50%;z-index:200;
  transform:translate(-50%,-180%);
  padding:12px 24px;border-radius:var(--pill);
  background:var(--neon);color:var(--ink);
  font-size:13px;font-weight:700;letter-spacing:.08em;
  transition:transform .22s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translate(-50%,0)}

/* ---------- 头部骨架 ---------- */
.site-header{position:relative;z-index:60}

.topbar{
  position:fixed;top:0;left:var(--rail-w);right:0;height:var(--bar-h);z-index:65;
  display:flex;align-items:center;gap:18px;
  padding:0 clamp(16px,3vw,42px);
  background:linear-gradient(180deg,rgba(10,21,34,.78),rgba(10,21,34,0));
  border-bottom:1px solid transparent;
  transition:height .3s var(--ease),background .3s var(--ease),border-color .3s var(--ease);
}
.site-header[data-scrolled] .topbar{
  height:62px;
  background:rgba(10,21,34,.94);
  border-bottom-color:var(--line);
  backdrop-filter:blur(12px);
}
.topbar__brand{
  display:none;align-items:baseline;gap:8px;
  font-family:var(--font-narrow);font-size:21px;font-weight:600;
  letter-spacing:.1em;color:var(--mist);
}
.topbar__brand-sub{font-family:var(--font-data);font-size:10px;letter-spacing:.16em;color:var(--slate)}
.topbar__actions{display:flex;align-items:center;gap:10px;margin-left:auto}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--pill);
  font-size:13.5px;font-weight:600;letter-spacing:.05em;white-space:nowrap;
  border:1px solid transparent;
  transition:transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn--primary{background:var(--neon);color:#08111B}
.btn--primary:hover{background:#d9ff74;transform:translateY(-2px)}
.btn--ghost{border-color:rgba(79,182,200,.42);color:var(--mist);background:rgba(16,33,47,.5)}
.btn--ghost:hover{border-color:var(--aqua);color:#fff;transform:translateY(-2px)}

/* ---------- 移动端开关 ---------- */
.nav-toggle{
  display:none;width:46px;height:46px;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  border-radius:15px;border:1px solid rgba(79,182,200,.34);background:rgba(16,33,47,.66);
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--aqua)}
.nav-toggle__bar{display:block;width:18px;height:2px;border-radius:2px;background:var(--mist);transition:transform .22s var(--ease),opacity .22s var(--ease)}
.site-header[data-open] .nav-toggle__bar:nth-child(1){transform:translateY(7px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bar:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle__bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-scrim{
  position:fixed;inset:0;z-index:63;
  background:rgba(4,10,17,.66);backdrop-filter:blur(3px);
  opacity:0;visibility:hidden;
  transition:opacity .3s var(--ease),visibility .3s linear;
}
.site-header[data-open] .nav-scrim{opacity:1;visibility:visible}

/* ---------- 左侧品牌轨道 ---------- */
.rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);z-index:70;
  display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:24px 10px 20px;
  background:linear-gradient(180deg,rgba(16,33,47,.9),rgba(10,21,34,.96));
  border-right:1px solid var(--line);
  backdrop-filter:blur(10px);
  transition:transform .38s var(--ease),background .3s var(--ease);
}
.rail__brand{
  display:flex;flex-direction:column;align-items:center;
  font-family:var(--font-narrow);font-size:19px;font-weight:600;
  line-height:1.32;letter-spacing:.1em;color:var(--mist);
  transition:color .18s var(--ease);
}
.rail__brand:hover{color:var(--neon)}
.rail__brand-line{display:block}
.rail__note{
  font-family:var(--font-data);font-size:9.5px;letter-spacing:.16em;
  color:var(--slate);text-align:center;
}
.rail__date{
  font-family:var(--font-data);font-size:10.5px;letter-spacing:.04em;
  color:var(--slate);text-align:center;margin-top:2px;
}
.rail__timer{
  margin-top:auto;width:100%;text-align:center;
  padding:12px 8px;border-radius:var(--r-m);
  background:linear-gradient(170deg,rgba(46,124,140,.26),rgba(15,42,56,.42));
  border:1px solid var(--line);
}
.rail__timer-label{display:block;font-family:var(--font-data);font-size:9.5px;letter-spacing:.2em;color:var(--slate)}
.rail__clock{
  display:block;margin-top:5px;
  font-family:var(--font-data);font-weight:700;font-size:15px;
  font-variant-numeric:tabular-nums;letter-spacing:.02em;color:var(--neon);
}
.rail__nav{width:100%}
.rail__nav ul{display:flex;flex-direction:column;gap:3px;width:100%}
.rail__link{
  display:flex;align-items:center;gap:7px;
  padding:9px 9px;border-radius:var(--r-s);
  font-size:12.5px;line-height:1.3;color:var(--slate);
  transition:color .18s var(--ease),background .18s var(--ease);
}
.rail__link:hover{color:var(--mist);background:rgba(79,182,200,.1)}
.rail__link[aria-current="page"],
.rail__link[data-active]{color:var(--neon);background:rgba(200,255,77,.09)}
.rail__link[aria-current="page"] .rail__num,
.rail__link[data-active] .rail__num{color:var(--neon)}
.rail__link[aria-current="page"]{box-shadow:inset 2px 0 0 var(--neon)}
.rail__num{
  font-family:var(--font-data);font-size:10px;font-weight:700;
  letter-spacing:.06em;color:rgba(132,151,163,.8);min-width:15px;
}
.rail__quick{
  display:block;width:100%;margin-top:6px;
  padding:11px 8px;border-radius:var(--pill);text-align:center;
  font-size:12px;font-weight:700;letter-spacing:.08em;
  background:var(--neon);color:#08111B;
  transition:transform .18s var(--ease),background .18s var(--ease);
}
.rail__quick:hover{background:#d9ff74;transform:translateY(-2px)}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;z-index:5;
  margin-top:clamp(60px,9vw,132px);
  padding:clamp(46px,6vw,84px) clamp(18px,3.6vw,56px) 26px;
  background:linear-gradient(180deg,rgba(16,33,47,.52),rgba(10,21,34,.99));
  border-top:1px solid var(--line);
}
.footer__inner{
  display:grid;grid-template-columns:minmax(260px,1.25fr) 2fr;
  gap:clamp(28px,4vw,68px);
  max-width:1320px;margin:0 auto;
}
.footer__logo{
  font-family:var(--font-narrow);font-weight:600;
  font-size:clamp(26px,3.4vw,40px);line-height:1.1;letter-spacing:.04em;
  color:var(--mist);
}
.footer__line{
  margin-top:10px;font-size:13px;letter-spacing:.06em;
  color:var(--aqua);font-family:var(--font-data);
}
.footer__contact{display:grid;gap:8px;margin-top:24px}
.footer__contact-row{
  font-family:var(--font-data);font-size:12.5px;line-height:1.7;
  color:#B9C9D2;word-break:break-word;
}
.footer__contact-key{
  display:inline-block;min-width:64px;margin-right:10px;
  font-family:var(--font-sans);font-size:11px;letter-spacing:.16em;color:var(--slate);
}
.footer__cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.footer__col-title{
  font-family:var(--font-data);font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--slate);margin-bottom:16px;
}
.footer__list{display:grid;gap:11px}
.footer__list a{
  font-size:14.5px;color:#C6D6DD;
  transition:color .18s var(--ease),padding-left .18s var(--ease);
}
.footer__list a:hover{color:var(--neon);padding-left:5px}
.footer__base{
  max-width:1320px;margin:clamp(34px,5vw,64px) auto 0;padding-top:20px;
  border-top:1px solid var(--hair);
  display:flex;flex-wrap:wrap;gap:12px 26px;justify-content:space-between;
  font-family:var(--font-data);font-size:12px;letter-spacing:.04em;color:var(--slate);
}
.footer__legal{color:var(--slate)}

/* ---------- 页面通用组件 ---------- */
.container{width:100%;max-width:1320px;margin:0 auto;padding:0 clamp(18px,3.6vw,56px)}
.section{position:relative;padding:clamp(46px,7vw,104px) 0}
.section--tight{padding:clamp(26px,4vw,56px) 0}
.divider{height:1px;border:0;margin:clamp(34px,6vw,72px) 0;background:linear-gradient(90deg,transparent,var(--line),transparent)}
.grid{display:grid;gap:clamp(16px,2vw,28px)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}

.eyebrow{font-family:var(--font-data);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--slate)}
.index-num{
  font-family:var(--font-data);font-weight:700;line-height:1;
  font-size:clamp(40px,7vw,96px);
  color:transparent;-webkit-text-stroke:1px rgba(79,182,200,.5);
}
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 13px;border-radius:var(--pill);
  font-size:12px;letter-spacing:.05em;
  border:1px solid rgba(79,182,200,.32);color:var(--aqua);
  background:rgba(28,75,87,.24);
}
.pill--hot{border-color:rgba(255,106,43,.45);color:var(--heat);background:rgba(255,106,43,.1)}
.pill--live{border-color:rgba(200,255,77,.45);color:var(--neon);background:rgba(200,255,77,.1)}

.card{
  position:relative;padding:clamp(18px,2vw,26px);
  border-radius:var(--r-l);
  background:linear-gradient(160deg,rgba(16,33,47,.94),rgba(10,21,34,.94));
  border:1px solid var(--line-soft);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.card:hover{
  transform:translateY(-2px);
  border-color:rgba(79,182,200,.38);
  box-shadow:0 20px 44px -26px rgba(79,182,200,.55);
}

.media{
  position:relative;overflow:hidden;
  border-radius:var(--r-l);
  background:linear-gradient(150deg,var(--grad-from),var(--grad-to));
  border:1px solid var(--line-soft);
}
.media img{width:100%;height:100%;object-fit:cover}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(237,244,246,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(237,244,246,.07) 1px,transparent 1px);
  background-size:32px 32px;
  opacity:.55;
}
.media--grid::after{opacity:1}
.media--wide{aspect-ratio:16/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media__caption{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:16px 18px;
  font-size:12px;letter-spacing:.04em;color:var(--mist);
  background:linear-gradient(0deg,rgba(10,21,34,.9),rgba(10,21,34,0));
}
.media-figure{display:grid;gap:10px;margin:0}

.prose{max-width:68ch;font-size:17px;line-height:1.75;color:#D3E0E6}
.prose > * + *{margin-top:1.2em}
.prose h2{font-size:clamp(22px,2.6vw,30px);color:var(--mist)}
.prose h3{font-size:clamp(18px,2vw,22px);color:var(--mist)}
.prose a{color:var(--aqua);border-bottom:1px solid rgba(79,182,200,.42)}
.prose a:hover{color:var(--neon);border-bottom-color:var(--neon)}
.prose ul{display:grid;gap:10px}
.prose li{position:relative;padding-left:20px}
.prose li::before{content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--aqua)}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;
  font-family:var(--font-data);font-size:12px;letter-spacing:.06em;color:var(--slate);
}
.breadcrumb > * + *::before{content:"/";margin:0 9px;color:rgba(132,151,163,.45)}
.breadcrumb a{color:var(--slate);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--aqua)}
.breadcrumb [aria-current="page"]{color:var(--mist)}

/* ---------- 滚动显现 ---------- */
.js [data-reveal]{
  opacity:0;transform:translateY(22px);
  transition:opacity .44s var(--ease),transform .44s var(--ease);
  will-change:opacity,transform;
}
.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1200px) and (min-width:901px){
  :root{--rail-w:96px}
  .rail__brand{font-size:17px}
  .rail__link{font-size:12px;padding:8px 8px}
}

@media (max-width:900px){
  :root{--rail-w:0px;--bar-h:64px}
  body{padding-left:0;background-attachment:scroll}
  .topbar{left:0;padding:0 16px;gap:10px}
  .topbar__brand{display:flex}
  .btn--ghost{display:none}
  .btn{padding:10px 16px;font-size:13px}
  .nav-toggle{display:flex}

  .rail{
    width:min(82vw,320px);
    align-items:flex-start;gap:14px;
    padding:88px 22px 30px;
    transform:translateX(-104%);
    z-index:64;
    background:linear-gradient(180deg,#10212F 0%,#0A1522 100%);
    border-right:1px solid rgba(79,182,200,.22);
    box-shadow:30px 0 70px -30px rgba(0,0,0,.85);
    backdrop-filter:none;
    overflow-y:auto;
  }
  .site-header[data-open] .rail{transform:translateX(0)}
  .rail__brand{align-items:flex-start;font-size:26px;letter-spacing:.08em}
  .rail__note{font-size:10px}
  .rail__date{font-size:12px;text-align:left}
  .rail__timer{margin-top:12px;text-align:left;padding:14px 16px}
  .rail__clock{font-size:22px}
  .rail__nav{margin-top:8px}
  .rail__link{font-size:14.5px;padding:11px 12px;gap:10px}
  .rail__num{font-size:11px;min-width:18px}
  .rail__quick{padding:13px 10px;font-size:13.5px;margin-top:10px}

  .footer__inner{grid-template-columns:1fr;gap:34px}
  .footer__cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px 20px}
  .footer__contact-key{min-width:56px}
}

@media (max-width:560px){
  body{font-size:16px}
  .footer__cols{grid-template-columns:1fr;gap:24px}
  .btn--primary{display:none}
  .footer__base{font-size:11px}
}

@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 !important;transform:none !important}
}