/* ========== 1. Reset ========== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote,dl,dd,fieldset{margin:0;padding:0;}
ul,ol{list-style:none;}
img,svg,video{max-width:100%;display:block;}
button{font:inherit;color:inherit;background:none;border:0;}
a{color:inherit;}
table{border-collapse:collapse;width:100%;}

/* ========== 2. 主题变量 ========== */
:root{
  --c-ink:#0B1220;
  --c-mid:#111A2E;
  --c-deep:#06101C;
  --c-cyan:#22D3EE;
  --c-cyan-soft:#67E8F9;
  --c-amber:#F5B942;
  --c-violet:#A855F7;
  --c-mist:#E5EDF7;
  --c-steel:#94A3B8;
  --c-green:#34D399;
  --c-warn:#FB923C;

  --line:rgba(148,163,184,.22);
  --line-soft:rgba(148,163,184,.12);
  --line-strong:rgba(34,211,238,.45);

  --surface:linear-gradient(155deg,rgba(17,26,46,.78),rgba(11,18,32,.62));
  --surface-2:linear-gradient(150deg,rgba(17,26,46,.94),rgba(6,16,28,.9));

  --r-lg:28px;
  --r-md:18px;
  --r-sm:12px;
  --r-pill:999px;

  --shell:1220px;
  --gutter:clamp(16px,4vw,40px);

  --font-head:'Noto Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-body:'Noto Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-mono:'JetBrains Mono','IBM Plex Mono','SFMono-Regular',Consolas,monospace;

  --fs-display:clamp(48px,8vw,112px);
  --fs-h1:clamp(36px,5vw,64px);
  --fs-h2:clamp(28px,3.5vw,44px);
  --fs-h3:clamp(20px,2.4vw,28px);
  --fs-body:16px;
  --fs-cap:13px;
  --fs-mono:13px;

  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-lift:0 26px 52px -34px rgba(0,0,0,.95);
  --shadow-card:0 20px 44px -32px rgba(34,211,238,.75);
  --z-header:80;
}

/* ========== 3. 基座与背景 ========== */
body{
  position:relative;
  background-color:var(--c-ink);
  color:var(--c-mist);
  font-family:var(--font-body);
  font-size:var(--fs-body);
  line-height:1.75;
  letter-spacing:.01em;
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(70% 50% at 8% -6%,rgba(34,211,238,.13),transparent 68%),
    radial-gradient(55% 42% at 96% 3%,rgba(168,85,247,.14),transparent 70%),
    radial-gradient(72% 46% at 50% 108%,rgba(245,185,66,.07),transparent 72%);
}
body::after{
  content:"";
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(148,163,184,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(148,163,184,.055) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(85% 65% at 50% 22%,#000,transparent 82%);
  mask-image:radial-gradient(85% 65% at 50% 22%,#000,transparent 82%);
}
main,.site-header,.site-footer{position:relative;z-index:1;}

::selection{background:rgba(34,211,238,.32);color:#fff;}

/* ========== 4. 排版与工具 ========== */
h1,h2,h3,h4{font-family:var(--font-head);font-weight:700;line-height:1.2;letter-spacing:0;}
p{text-wrap:pretty;}

.display{
  font-family:var(--font-head);
  font-size:var(--fs-display);
  font-weight:800;
  line-height:.95;
  letter-spacing:-.01em;
  margin:0;
}
.section-title{font-size:var(--fs-h2);font-weight:700;line-height:1.15;margin:0 0 14px;}
.lede{max-width:62ch;color:var(--c-steel);font-size:clamp(15px,1.4vw,17px);}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);
  font-size:var(--fs-mono);
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--c-cyan-soft);
  margin:0 0 16px;
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;
  background:linear-gradient(90deg,var(--c-cyan),rgba(34,211,238,0));
  flex:none;
}

.ghost-word{
  font-family:var(--font-mono);
  font-size:clamp(60px,16vw,220px);
  line-height:.8;
  letter-spacing:.04em;
  color:transparent;
  -webkit-text-stroke:1px rgba(34,211,238,.18);
  pointer-events:none;
  user-select:none;
}

.divider{
  height:1px;border:0;margin:0;
  background:linear-gradient(90deg,rgba(34,211,238,.5),rgba(168,85,247,.28),rgba(148,163,184,.08));
}

.sr-only{
  position:absolute!important;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;
}

.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 var(--gutter);}
.section{padding:clamp(40px,7vw,88px) 0;}

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

/* ========== 5. 按钮 ========== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:14px;font-weight:600;letter-spacing:.02em;
  text-decoration:none;white-space:nowrap;cursor:pointer;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-ghost{
  color:var(--c-cyan-soft);
  border-color:rgba(34,211,238,.35);
  background:rgba(34,211,238,.06);
}
.btn-ghost:hover,.btn-ghost:focus-visible{
  color:#fff;border-color:var(--c-cyan);background:rgba(34,211,238,.15);
}
.btn-amber{
  color:#20160A;
  background:linear-gradient(135deg,#F5B942,#FFD582);
  box-shadow:0 12px 26px -16px rgba(245,185,66,.9);
}
.btn-amber:hover,.btn-amber:focus-visible{
  box-shadow:0 0 0 1px rgba(245,185,66,.55),0 16px 34px -14px rgba(245,185,66,.85);
}

/* ========== 6. 头部 ========== */
.site-header{
  position:sticky;top:0;z-index:var(--z-header);
  padding:12px var(--gutter) 4px;
  background:linear-gradient(180deg,rgba(11,18,32,.97) 0%,rgba(11,18,32,.8) 58%,rgba(11,18,32,0) 100%);
}
.header-shell{
  position:relative;
  display:flex;align-items:center;gap:clamp(10px,2vw,26px);
  width:100%;max-width:var(--shell);margin:0 auto;
  padding:9px 12px 9px 16px;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  background:linear-gradient(120deg,rgba(17,26,46,.95),rgba(11,18,32,.88));
  box-shadow:var(--shadow-lift),inset 0 1px 0 rgba(229,237,247,.05);
}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  text-decoration:none;flex:none;
}
.brand-mark{
  display:grid;place-items:center;
  width:34px;height:34px;flex:none;
  border-radius:11px;
  font-family:var(--font-mono);font-size:15px;font-weight:700;
  color:#20160A;
  background:linear-gradient(135deg,var(--c-amber),#FFD582);
  box-shadow:0 8px 18px -12px rgba(245,185,66,.95);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-name{font-family:var(--font-head);font-size:15px;font-weight:700;letter-spacing:.04em;}
.brand-sub{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  color:var(--c-steel);text-transform:uppercase;
}

.nav-bar{flex:1 1 auto;min-width:0;display:flex;align-items:center;justify-content:center;}
.nav-list{display:flex;align-items:center;gap:2px;}
.nav-item{flex:none;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 14px;
  border-radius:var(--r-pill);
  font-size:14px;font-weight:500;
  color:var(--c-steel);
  text-decoration:none;
  transition:color .2s var(--ease),background-color .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-link::before{
  content:"";
  position:absolute;left:14px;bottom:5px;
  width:0;height:1px;border-radius:2px;
  background:var(--c-cyan);
  transition:width .22s var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--c-mist);background:rgba(148,163,184,.09);}
.nav-link:hover::before,.nav-link:focus-visible::before{width:14px;}
.nav-link[aria-current="page"]{
  color:var(--c-cyan-soft);
  background:rgba(34,211,238,.12);
  box-shadow:inset 0 0 0 1px rgba(34,211,238,.35);
}
.nav-link[aria-current="page"]::before{width:14px;background:var(--c-amber);}

.nav-foot{display:none;}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto;flex:none;}

.nav-toggle{
  display:none;
  width:44px;height:44px;flex:none;margin-left:auto;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  border:1px solid rgba(34,211,238,.32);
  border-radius:var(--r-pill);
  background:rgba(34,211,238,.08);
  cursor:pointer;
  transition:background-color .2s var(--ease),border-color .2s var(--ease);
}
.nav-toggle:hover{background:rgba(34,211,238,.16);border-color:var(--c-cyan);}
.nav-toggle-bar{
  display:block;width:18px;height:2px;border-radius:2px;
  background:var(--c-cyan-soft);
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.scroll-progress{
  position:absolute;left:18px;right:18px;bottom:2px;height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--c-cyan),var(--c-violet),var(--c-amber));
  transform:scaleX(0);transform-origin:left center;
  transition:transform .12s linear;
  will-change:transform;
}

.skip-link{
  position:absolute;left:50%;top:4px;z-index:120;
  padding:10px 20px;
  border-radius:var(--r-pill);
  background:var(--c-amber);color:#20160A;
  font-size:14px;font-weight:700;text-decoration:none;
  transform:translate(-50%,-160%);
  transition:transform .18s var(--ease);
}
.skip-link:focus-visible{transform:translate(-50%,0);outline-offset:2px;}

/* ========== 7. 页脚 ========== */
.site-footer{
  margin-top:clamp(48px,8vw,96px);
  padding:clamp(36px,6vw,68px) 0 26px;
  background:linear-gradient(180deg,rgba(6,16,28,.55),var(--c-deep) 42%);
  border-top:1px solid var(--line);
}
.footer-shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 var(--gutter);}
.footer-top{
  display:grid;
  grid-template-columns:1.5fr .9fr .9fr 1.4fr;
  gap:clamp(20px,3vw,44px);
  padding-bottom:clamp(24px,4vw,40px);
  border-bottom:1px solid var(--line-soft);
}
.footer-title{
  font-family:var(--font-head);font-size:20px;font-weight:700;
  letter-spacing:.06em;margin-bottom:10px;
}
.footer-note{color:var(--c-steel);font-size:14px;max-width:34ch;}
.footer-heading{
  font-family:var(--font-mono);font-size:var(--fs-mono);
  letter-spacing:.16em;text-transform:uppercase;
  color:var(--c-cyan-soft);margin-bottom:14px;
}
.footer-list{display:flex;flex-direction:column;gap:9px;font-size:14px;}
.footer-list a{
  color:var(--c-steel);text-decoration:none;
  transition:color .2s var(--ease);
}
.footer-list a:hover,.footer-list a:focus-visible{color:var(--c-cyan-soft);text-decoration:underline;}
.footer-list a[aria-current="page"]{color:var(--c-cyan-soft);}
.footer-contact .footer-list li{display:flex;flex-wrap:wrap;gap:8px;align-items:baseline;}
.footer-label{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  color:var(--c-steel);flex:none;
  padding:1px 7px;border-radius:var(--r-pill);
  border:1px solid var(--line-soft);
}
.footer-value{color:var(--c-mist);word-break:break-all;}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  padding-top:20px;
}
.footer-copy,.footer-legal{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--c-steel);
}

/* ========== 8. 通用组件 ========== */
.card{
  position:relative;display:block;
  padding:clamp(18px,2.4vw,26px);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:var(--surface);
  color:inherit;text-decoration:none;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.card:hover,.card:focus-visible{
  transform:translateY(-2px);
  border-color:var(--line-strong);
  box-shadow:var(--shadow-card);
}
.card-title{font-family:var(--font-head);font-size:var(--fs-h3);font-weight:700;margin-bottom:8px;}
.card-text{color:var(--c-steel);font-size:14px;max-width:36ch;}

.card-grid{
  display:grid;gap:clamp(14px,2vw,22px);
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
}
.grid-2,.grid-3{display:grid;gap:clamp(16px,2.4vw,28px);grid-template-columns:1fr;}

.plate{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:8px 14px;
  border:1px dashed rgba(148,163,184,.3);
  border-radius:var(--r-pill);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.09em;
  color:var(--c-steel);
}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  background:rgba(148,163,184,.06);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:var(--c-steel);
}
.tag[data-tone="cyan"]{color:var(--c-cyan-soft);border-color:rgba(34,211,238,.4);background:rgba(34,211,238,.09);}
.tag[data-tone="amber"]{color:var(--c-amber);border-color:rgba(245,185,66,.4);background:rgba(245,185,66,.09);}
.tag[data-tone="green"]{color:var(--c-green);border-color:rgba(52,211,153,.4);background:rgba(52,211,153,.09);}
.tag[data-tone="warn"]{color:var(--c-warn);border-color:rgba(251,146,60,.4);background:rgba(251,146,60,.09);}

.status{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
}
.status::before{content:"";width:8px;height:8px;border-radius:50%;background:currentColor;flex:none;}
.status[data-tone="cyan"]{color:var(--c-cyan);}
.status[data-tone="green"]{color:var(--c-green);}
.status[data-tone="warn"]{color:var(--c-warn);}
.status[data-tone="steel"]{color:var(--c-steel);}

.timeline{position:relative;padding-left:26px;border-left:1px solid var(--line);}
.timeline-item{position:relative;padding-bottom:26px;}
.timeline-item:last-child{padding-bottom:0;}
.timeline-item::before{
  content:"";position:absolute;left:-32px;top:9px;
  width:11px;height:11px;border-radius:50%;
  background:var(--c-ink);
  border:2px solid var(--c-cyan);
  box-shadow:0 0 0 4px rgba(34,211,238,.12);
}
.timeline-item[data-state="now"]::before{
  border-color:var(--c-amber);
  box-shadow:0 0 0 4px rgba(245,185,66,.16);
}
.timeline-date{
  display:block;
  font-family:var(--font-mono);font-size:var(--fs-mono);
  letter-spacing:.08em;color:var(--c-cyan-soft);margin-bottom:4px;
}

.media-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16/9;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:var(--surface-2);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(72% 72% at 50% 42%,rgba(34,211,238,.14),transparent 70%);
}
.media-frame img{width:100%;height:100%;object-fit:cover;}
.media-frame[data-ratio="4-3"]{aspect-ratio:4/3;}
.media-frame[data-ratio="1-1"]{aspect-ratio:1/1;}
.media-frame[data-ratio="21-9"]{aspect-ratio:21/9;}
.media-frame[data-fit="contain"] img{object-fit:contain;}

.breadcrumb{
  font-family:var(--font-mono);font-size:var(--fs-mono);
  letter-spacing:.06em;color:var(--c-steel);margin:0 0 22px;
}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.breadcrumb-list li+li::before{content:"/";margin-right:10px;color:rgba(148,163,184,.45);}
.breadcrumb-list a{color:var(--c-cyan-soft);text-decoration:none;}
.breadcrumb-list a:hover,.breadcrumb-list a:focus-visible{color:#fff;text-decoration:underline;}

.pill-tabs{
  display:flex;flex-wrap:wrap;gap:6px;
  padding:6px;border:1px solid var(--line);border-radius:var(--r-pill);
  background:rgba(17,26,46,.6);
}
.pill-tab{
  padding:8px 16px;border-radius:var(--r-pill);
  font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;
  color:var(--c-steel);cursor:pointer;
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.pill-tab:hover{color:var(--c-mist);}
.pill-tab[aria-selected="true"]{color:var(--c-cyan-soft);background:rgba(34,211,238,.16);}
.pill-tab:focus-visible{outline:2px solid var(--c-cyan);outline-offset:2px;}

.fold{
  border:1px solid var(--line);border-radius:var(--r-md);
  background:rgba(17,26,46,.5);overflow:hidden;
}
.fold+.fold{margin-top:10px;}
.fold-trigger{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  width:100%;padding:16px 18px;
  font-weight:600;text-align:left;cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.fold-trigger:hover{background:rgba(34,211,238,.07);color:var(--c-cyan-soft);}
.fold-trigger::after{
  content:"+";flex:none;
  font-family:var(--font-mono);font-size:16px;color:var(--c-cyan);
}
.fold-trigger[aria-expanded="true"]::after{content:"–";}
.fold-panel{padding:0 18px 18px;color:var(--c-steel);font-size:15px;}
.fold-panel[hidden]{display:none;}

[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
[data-reveal].is-visible{opacity:1;transform:none;}

[data-spy-link]{
  display:block;padding:8px 14px;border-left:1px solid var(--line);
  font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;
  color:var(--c-steel);text-decoration:none;
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
[data-spy-link]:hover{color:var(--c-mist);}
[data-spy-link].is-active{
  color:var(--c-cyan-soft);
  border-left-color:var(--c-amber);
  background:linear-gradient(90deg,rgba(34,211,238,.14),transparent);
}

/* ========== 9. 断点 ========== */
@media (min-width:768px){
  .grid-2{grid-template-columns:repeat(2,minmax(0,1fr));}
  .grid-3{grid-template-columns:repeat(3,minmax(0,1fr));}
}

@media (max-width:1023px){
  .nav-toggle{display:inline-flex;}
  .header-actions{display:none;}
  .nav-bar{
    position:absolute;
    top:calc(100% + 10px);left:0;right:0;
    display:block;
    padding:14px;
    border:1px solid var(--line);
    border-radius:var(--r-md);
    background:linear-gradient(160deg,rgba(17,26,46,.99),rgba(11,18,32,.99));
    box-shadow:0 34px 60px -30px rgba(0,0,0,.95);
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s linear;
  }
  .nav-bar[data-open]{opacity:1;visibility:visible;transform:translateY(0);}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px;}
  .nav-link{display:block;padding:12px 14px;}
  .nav-link::before{left:14px;bottom:8px;}
  .nav-foot{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px;padding-top:12px;border-top:1px solid var(--line-soft);}
}

@media (max-width:1023px) and (min-width:768px){
  .footer-top{grid-template-columns:1fr 1fr;}
}

@media (max-width:767px){
  .header-shell{padding:8px 10px 8px 12px;}
  .brand-sub{display:none;}
  .footer-top{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;}
  .section{padding:clamp(32px,10vw,56px) 0;}
}

@media (max-width:420px){
  .brand-name{font-size:14px;}
  .nav-toggle{width:40px;height:40px;}
}

/* ========== 10. 动效与无障碍 ========== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  [data-reveal]{opacity:1;transform:none;}
  .card:hover,.card:focus-visible{transform:none;}
  .scroll-progress{transition:none;}
}