:root{
  --ink-950:#070F1F;
  --ink-800:#12203A;
  --ink-700:#1D3255;
  --neon-cyan:#22E0D0;
  --cyan-100:#8CF4E8;
  --blazing-red:#FF4A27;
  --score-amber:#FFC24B;
  --chalk:#F2F6FD;
  --slate-300:#C3D2E8;
  --blue-gray:#8FA2C0;

  --rail-w:10px;
  --shell:1320px;
  --gut:clamp(16px,3vw,40px);

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-editorial:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,"Times New Roman",serif;
  --font-mono:ui-monospace,"Roboto Mono","SFMono-Regular",Menlo,Consolas,"Courier New",monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}

html{
  background:var(--ink-950);
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  min-height:100vh;
  padding-inline:var(--rail-w);
  background:var(--ink-950);
  color:var(--slate-300);
  font-family:var(--font-display);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5{
  margin:0;
  color:var(--chalk);
  font-weight:900;
  line-height:1.06;
  letter-spacing:-.02em;
}

p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,picture{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
hr{border:0}

::selection{background:var(--neon-cyan);color:#04121A}

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

.skip-link{
  position:fixed;
  top:8px;
  left:calc(var(--rail-w) + 8px);
  z-index:300;
  padding:10px 18px;
  background:var(--neon-cyan);
  color:#04121A;
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  border-radius:2px;
  transform:translateY(-180%);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 赛场边框刻度轨 ---------- */
.frame-rail{
  position:fixed;
  top:0;
  bottom:0;
  width:var(--rail-w);
  z-index:200;
  pointer-events:none;
  background-color:var(--ink-800);
  background-image:repeating-linear-gradient(180deg,rgba(34,224,208,.55) 0 2px,rgba(34,224,208,0) 2px 18px);
}
.frame-rail--left{left:0;border-right:1px solid var(--ink-700)}
.frame-rail--right{right:0;border-left:1px solid var(--ink-700)}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(7,15,31,.94);
  border-bottom:1px solid var(--ink-700);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}

.status-strip{
  background:
    linear-gradient(90deg,rgba(34,224,208,.12),rgba(255,74,39,.07) 60%,rgba(7,15,31,0)),
    var(--ink-950);
  border-bottom:1px solid var(--ink-700);
  color:var(--slate-300);
  font-size:12px;
  letter-spacing:.08em;
}
.status-strip__inner{
  max-width:var(--shell);
  margin-inline:auto;
  padding:8px var(--gut);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  transition:padding .2s var(--ease);
}
.status-strip__item{display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
.status-strip__dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--blazing-red);
  box-shadow:0 0 0 3px rgba(255,74,39,.18);
  flex:0 0 auto;
}
.status-strip__sep{width:1px;height:11px;background:var(--ink-700)}

.site-header.is-compact .status-strip__inner{padding-block:4px;font-size:11px}
.site-header.is-compact .status-strip [data-hide-compact]{display:none}

.header-bar{
  position:relative;
  max-width:var(--shell);
  margin-inline:auto;
  padding:12px var(--gut);
  display:flex;
  align-items:center;
  gap:clamp(14px,2.4vw,34px);
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}
.brand-mark{
  width:40px;
  height:40px;
  display:grid;
  place-items:center;
  background:linear-gradient(140deg,var(--neon-cyan),#0E8E86);
  color:#04121A;
  font-weight:900;
  font-size:20px;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{
  color:var(--chalk);
  font-weight:900;
  font-size:19px;
  letter-spacing:.01em;
}
.brand-tag{
  color:var(--blue-gray);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
}

.site-nav{flex:1 1 auto;min-width:0}
.site-nav__list{display:flex;align-items:center;flex-wrap:wrap;gap:2px}
.site-nav__link{
  position:relative;
  display:inline-block;
  padding:9px 14px;
  color:var(--slate-300);
  font-size:14px;
  font-weight:600;
  letter-spacing:.02em;
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:3px;
  height:2px;
  background:var(--neon-cyan);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .2s var(--ease),background-color .2s var(--ease);
}
.site-nav__link:hover{color:var(--chalk);background:rgba(34,224,208,.07)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--neon-cyan)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--score-amber)}

.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  border:1px solid var(--ink-700);
  border-radius:2px;
  white-space:nowrap;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px));
}
.btn--primary{
  background:var(--neon-cyan);
  border-color:var(--neon-cyan);
  color:#04121A;
}
.btn--primary:hover{
  background:var(--blazing-red);
  border-color:var(--blazing-red);
  color:#FFF4F0;
  transform:translateY(-2px);
  box-shadow:0 10px 24px rgba(255,74,39,.28);
}
.btn--ghost{
  background:transparent;
  color:var(--cyan-100);
  border-color:var(--ink-700);
}
.btn--ghost:hover{
  border-color:var(--neon-cyan);
  color:var(--chalk);
  background:rgba(34,224,208,.09);
  transform:translateY(-2px);
}

/* ---------- 移动导航按钮 ---------- */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:10px 14px;
  border:1px solid var(--ink-700);
  border-radius:2px;
  color:var(--cyan-100);
  font-size:12px;
  font-weight:700;
  letter-spacing:.18em;
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--neon-cyan)}
.nav-toggle[aria-expanded="true"]{
  border-color:var(--neon-cyan);
  color:var(--neon-cyan);
  background:rgba(34,224,208,.1);
}
.nav-toggle__bars{
  width:16px;
  height:10px;
  flex:0 0 auto;
  background-image:
    linear-gradient(var(--neon-cyan),var(--neon-cyan)),
    linear-gradient(var(--neon-cyan),var(--neon-cyan));
  background-repeat:no-repeat;
  background-size:100% 2px,100% 2px;
  background-position:0 0,0 100%;
}

/* ---------- 阅读进度 ---------- */
.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:rgba(29,50,85,.7);
  pointer-events:none;
}
.scroll-progress__bar{
  display:block;
  height:100%;
  width:100%;
  background:linear-gradient(90deg,var(--neon-cyan),var(--score-amber));
  transform:scaleX(0);
  transform-origin:0 50%;
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  overflow:hidden;
  margin-top:clamp(40px,7vw,96px);
  background:linear-gradient(180deg,#0A1526 0%,var(--ink-950) 70%);
  border-top:1px solid var(--ink-700);
}
.footer-watermark{
  position:absolute;
  right:var(--gut);
  top:clamp(8px,2vw,24px);
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(56px,11vw,116px);
  line-height:1;
  letter-spacing:.02em;
  color:rgba(34,224,208,.07);
  -webkit-text-stroke:1px rgba(34,224,208,.18);
  pointer-events:none;
  user-select:none;
}

.footer-top{
  position:relative;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(40px,6vw,76px) var(--gut) clamp(24px,3vw,36px);
  display:grid;
  grid-template-columns:4fr 8fr;
  gap:clamp(24px,4vw,56px);
}
.footer-brand__name{
  color:var(--chalk);
  font-size:20px;
  font-weight:900;
  letter-spacing:-.01em;
}
.footer-brand__tag{
  margin-top:8px;
  color:var(--blue-gray);
  font-family:var(--font-editorial);
  font-size:16px;
  line-height:1.6;
  max-width:22ch;
}

.footer-cols{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(16px,2.4vw,32px);
}
.footer-col__title{
  color:var(--neon-cyan);
  font-size:11px;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  padding-bottom:10px;
  border-bottom:1px solid var(--ink-700);
}
.footer-col__list{margin-top:14px;display:flex;flex-direction:column;gap:9px}
.footer-col__link{
  display:inline-block;
  color:var(--slate-300);
  font-size:14px;
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-col__link:hover{color:var(--neon-cyan);transform:translateX(3px)}

.status-band{
  position:relative;
  max-width:var(--shell);
  margin-inline:auto;
  padding:16px var(--gut);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px clamp(18px,3vw,44px);
  border-top:1px solid var(--ink-700);
  border-bottom:1px solid var(--ink-700);
  background:linear-gradient(90deg,rgba(34,224,208,.07),rgba(7,15,31,0) 70%);
}
.status-band__item{display:inline-flex;align-items:baseline;gap:10px}
.status-band__key{
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--blue-gray);
}
.status-band__val{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:700;
  font-size:14px;
  letter-spacing:.02em;
  color:var(--score-amber);
}

.footer-contact{
  position:relative;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(24px,3vw,36px) var(--gut);
  display:flex;
  flex-direction:column;
  gap:12px;
}
.footer-contact__row{
  display:grid;
  grid-template-columns:120px 1fr;
  gap:12px;
  align-items:baseline;
  padding-bottom:12px;
  border-bottom:1px solid rgba(29,50,85,.6);
}
.footer-contact__label{
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--blue-gray);
}
.footer-contact__value{
  color:var(--chalk);
  font-size:15px;
  line-height:1.7;
}
.copy-btn{
  font-family:var(--font-mono);
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--cyan-100);
  border-bottom:1px dashed rgba(34,224,208,.5);
  padding-bottom:2px;
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.copy-btn:hover{color:var(--neon-cyan);border-color:var(--neon-cyan)}
.copy-btn.is-copied{
  color:var(--ink-950);
  background:var(--neon-cyan);
  border-color:var(--neon-cyan);
  padding:2px 8px;
  border-radius:2px;
}

.footer-legal{
  position:relative;
  max-width:var(--shell);
  margin-inline:auto;
  padding:18px var(--gut) clamp(28px,4vw,48px);
  display:flex;
  flex-wrap:wrap;
  gap:8px 28px;
  justify-content:space-between;
}
.footer-legal__note{
  color:var(--blue-gray);
  font-size:12.5px;
  line-height:1.7;
  max-width:70ch;
}

/* ---------- 通用布局与排版 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gut);
}
.shell--narrow{max-width:760px}

.section{padding-block:clamp(48px,8vw,112px)}
.section--tight{padding-block:clamp(28px,4vw,56px)}
.section--alt{
  background:var(--ink-800);
  border-top:1px solid var(--ink-700);
  border-bottom:1px solid var(--ink-700);
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:11px;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--neon-cyan);
}
.eyebrow::before{
  content:"";
  width:20px;
  height:2px;
  background:var(--neon-cyan);
  display:inline-block;
}

.display{
  font-size:clamp(2.6rem,7vw,5.4rem);
  font-weight:900;
  line-height:.98;
  letter-spacing:-.02em;
  color:var(--chalk);
}

.lede{
  font-family:var(--font-editorial);
  font-weight:600;
  font-size:clamp(1.15rem,2vw,1.75rem);
  line-height:1.5;
  color:var(--chalk);
  max-width:38ch;
}

.prose{
  max-width:62ch;
  font-size:17px;
  line-height:1.75;
  color:var(--slate-300);
}
.prose p{margin:0 0 1.1em}
.prose h2,.prose h3{margin:1.6em 0 .6em}
.prose a{color:var(--cyan-100);border-bottom:1px solid rgba(34,224,208,.5)}
.prose a:hover{color:var(--neon-cyan)}

.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}

.slant-rule{
  height:2px;
  border:0;
  margin:0;
  background:linear-gradient(90deg,var(--neon-cyan),rgba(34,224,208,0) 70%);
  transform:skewY(-1.4deg);
}

.breadcrumb{font-size:13px;color:var(--blue-gray)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center}
.breadcrumb__item{display:inline-flex;align-items:center}
.breadcrumb__item:not(:first-child)::before{
  content:"/";
  margin-inline:10px;
  color:var(--neon-cyan);
  opacity:.5;
}
.breadcrumb__link{color:var(--slate-300)}
.breadcrumb__link:hover{color:var(--neon-cyan)}

.panel{
  background:var(--ink-800);
  border:1px solid var(--ink-700);
  padding:clamp(20px,3vw,34px);
  transition:border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.panel--cut{
  clip-path:polygon(0 0,calc(100% - 16px) 0,100% 16px,100% 100%,16px 100%,0 calc(100% - 16px));
}
.panel:hover{
  border-color:var(--neon-cyan);
  transform:translateY(-2px);
  box-shadow:0 16px 32px rgba(0,0,0,.4);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  font-size:11px;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan-100);
  border:1px solid var(--ink-700);
  background:rgba(34,224,208,.06);
  border-radius:2px;
}
.tag--hot{color:var(--blazing-red);border-color:rgba(255,74,39,.6);background:rgba(255,74,39,.1)}
.tag--score{color:var(--score-amber);border-color:rgba(255,194,75,.45);background:rgba(255,194,75,.08)}

.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:700;
  font-size:clamp(2rem,5vw,3.4rem);
  line-height:1;
  letter-spacing:.02em;
  color:var(--chalk);
}
.stat__label{
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--blue-gray);
}

.grid{display:grid;gap:clamp(20px,3vw,40px)}
.grid--8-4{grid-template-columns:8fr 4fr}
.grid--7-5{grid-template-columns:7fr 5fr}
.grid--9-3{grid-template-columns:9fr 3fr}
.grid--twins{grid-template-columns:1fr 1fr;gap:0}

/* ---------- 可复用图片容器 ---------- */
.img-frame{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  background:var(--ink-800);
  border:1px solid var(--ink-700);
}
.img-frame > img,
.img-frame > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.img-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    linear-gradient(200deg,rgba(34,224,208,.16),rgba(34,224,208,0) 55%),
    linear-gradient(0deg,rgba(7,15,31,.62),rgba(7,15,31,0) 62%);
}
.img-frame--wide{aspect-ratio:16/9}
.img-frame--tall{aspect-ratio:3/4}
.img-frame--square{aspect-ratio:1/1}
.img-frame--angle{
  clip-path:polygon(0 16px,16px 0,100% 0,100% calc(100% - 16px),calc(100% - 16px) 100%,0 100%);
  border:0;
}

/* ---------- 揭示动效 ---------- */
.js-ready [data-reveal]{
  opacity:0;
  transform:translateY(6px);
  transition:opacity .22s ease-out,transform .22s ease-out;
}
.js-ready [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:none;
    flex-direction:column;
    align-items:stretch;
    background:var(--ink-800);
    border-top:1px solid var(--ink-700);
    border-bottom:2px solid var(--neon-cyan);
    box-shadow:0 24px 48px rgba(0,0,0,.55);
    max-height:calc(100vh - 140px);
    overflow-y:auto;
    padding:4px 0 10px;
  }
  .site-nav[data-open="true"]{display:flex}
  .site-nav__list{flex-direction:column;align-items:stretch;width:100%;gap:0}
  .site-nav__item{width:100%}
  .site-nav__link{
    display:block;
    padding:15px var(--gut);
    font-size:16px;
    border-bottom:1px solid var(--ink-700);
  }
  .site-nav__link::after{left:var(--gut);right:auto;width:28px;bottom:8px}
  .site-nav__link[aria-current="page"]{
    border-left:3px solid var(--blazing-red);
    background:rgba(255,74,39,.06);
  }
  .site-nav__link:hover{background:rgba(34,224,208,.08)}
}

@media (max-width:900px){
  .footer-top{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--8-4,.grid--7-5,.grid--9-3,.grid--twins{grid-template-columns:1fr}
  .footer-contact__row{grid-template-columns:1fr;gap:4px}
}

@media (max-width:720px){
  :root{--rail-w:4px}
  .brand-mark{width:34px;height:34px;font-size:17px}
  .brand-name{font-size:17px}
  .brand-tag{font-size:10px;letter-spacing:.16em}
  .footer-cols{grid-template-columns:1fr}
  .status-band{gap:10px 20px}
  .footer-legal{flex-direction:column}
}

@media (max-width:560px){
  body{font-size:16px}
  .header-bar{padding:10px var(--gut);gap:10px}
  .header-actions .btn--ghost{display:none}
  .btn{padding:10px 15px;font-size:12px;letter-spacing:.04em}
  .lede{max-width:none}
}

@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-ready [data-reveal]{opacity:1;transform:none}
  .panel:hover,.btn:hover,.footer-col__link:hover{transform:none}
  .scroll-progress__bar{transition:none}
}