:root{
  --ink:#061C18;
  --panel:#0B2B24;
  --track:#123A32;
  --cyan:#27F5D4;
  --paper:#D8FFF8;
  --mute:#8FB8AE;
  --alert:#FF5A36;
  --gold:#F2B84B;
  --edge:#3AAE9E;
  --white:#FFFFFF;
  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --gutter:clamp(1rem,3.2vw,1.6rem);
  --radius-s:6px;
  --radius-m:12px;
  --radius-l:18px;
  --shell:min(1280px,calc(100% - var(--gutter) * 2));
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(900px 520px at 88% -8%,rgba(39,245,212,.10),transparent 62%),
    radial-gradient(720px 420px at 4% 6%,rgba(255,90,54,.07),transparent 64%);
  background-repeat:no-repeat;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote,address{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
img,svg,video{display:block;max-width:100%;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:2px;}
::selection{background:rgba(39,245,212,.28);color:var(--white);}

h1,h2,h3{
  font-family:var(--font-display);
  font-weight:900;
  color:var(--white);
  line-height:1.04;
  letter-spacing:-.03em;
}
h1{
  font-size:clamp(3rem,8vw,7rem);
  font-stretch:condensed;
  letter-spacing:-.04em;
  line-height:.98;
}
h2{font-size:clamp(1.75rem,3.4vw,2.75rem);letter-spacing:-.02em;}
h3{font-size:clamp(1.05rem,1.4vw,1.25rem);font-weight:800;letter-spacing:-.01em;line-height:1.3;}
h4{font-size:1rem;font-weight:700;color:var(--paper);}

.sr-only{
  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;
}

/* ---------- 跳过链接 ---------- */
.skip-link{
  position:fixed;top:.6rem;left:.6rem;z-index:300;
  padding:.7rem 1.15rem;border-radius:8px;
  background:var(--cyan);color:#04150F;
  font-weight:800;font-size:.9rem;letter-spacing:.02em;
  transform:translateY(-180%);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0);}

/* ---------- 布局容器 ---------- */
.container{width:var(--shell);margin-inline:auto;}
.container--narrow{width:min(820px,calc(100% - var(--gutter) * 2));margin-inline:auto;}
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(1rem,2.2vw,2rem);
}
.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:span 12;}
.divider{height:1px;border:0;background:var(--track);margin:clamp(1.6rem,3vw,2.6rem) 0;}

/* ---------- 文字与数据 ---------- */
.label{
  display:inline-flex;align-items:center;gap:.55rem;
  font-family:var(--font-mono);
  font-size:.72rem;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;
  color:var(--edge);
}
.label::before{content:"";width:22px;height:1px;background:currentColor;flex:0 0 auto;}
.data-num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
}
.tag{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.22rem .6rem;border-radius:999px;
  border:1px solid rgba(58,174,158,.5);
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.08em;
  color:var(--mute);white-space:nowrap;
}
.tag--gold{border-color:rgba(242,184,75,.55);color:var(--gold);}
.tag--alert{border-color:rgba(255,90,54,.6);color:var(--alert);}
.prose{max-width:38em;font-size:1.05rem;line-height:1.78;color:var(--paper);}
.prose p + p{margin-top:1.05em;}
.prose h2{margin-top:2.2em;margin-bottom:.55em;}
.prose h3{margin-top:1.8em;margin-bottom:.5em;color:var(--cyan);}
.prose ul{list-style:disc;padding-left:1.2em;margin-top:.8em;}
.prose li + li{margin-top:.4em;}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(39,245,212,.4);}
.prose strong{color:var(--white);}

/* ---------- 材质层 ---------- */
.surface{
  background:var(--panel);
  border:1px solid var(--track);
  border-radius:var(--radius-m);
  padding:clamp(1.15rem,2.4vw,1.75rem);
}
.glass{
  background:rgba(18,58,50,.36);
  border:1px solid rgba(58,174,158,.42);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-radius:var(--radius-m);
  padding:clamp(1.15rem,2.4vw,1.75rem);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.62rem 1.2rem;border-radius:999px;
  border:1px solid transparent;
  font-size:.875rem;font-weight:700;letter-spacing:.02em;line-height:1.2;
  white-space:nowrap;
  transition:background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease),transform .16s var(--ease),box-shadow .16s var(--ease);
}
.btn:hover{transform:translateY(-1px);}
.btn-primary{background:var(--cyan);color:#04150F;box-shadow:0 0 0 0 rgba(39,245,212,.4);}
.btn-primary:hover{background:#63FFE8;box-shadow:0 6px 22px rgba(39,245,212,.28);}
.btn-ghost{border-color:rgba(58,174,158,.55);color:var(--paper);}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);}

/* ---------- 面包屑 ---------- */
.breadcrumbs{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--mute);}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;}
.breadcrumb-list li{display:inline-flex;align-items:center;}
.breadcrumb-list li:not(:last-child)::after{content:"/";margin-left:.5rem;color:var(--edge);}
.breadcrumb-list a{color:var(--mute);transition:color .16s var(--ease);}
.breadcrumb-list a:hover{color:var(--cyan);}
.breadcrumb-list [aria-current="page"]{color:var(--paper);}

/* ---------- 图片容器基础规则 ---------- */
.media-frame{
  position:relative;overflow:hidden;
  border:1px solid rgba(58,174,158,.35);
  border-radius:var(--radius-m);
  aspect-ratio:16 / 9;
  background:
    radial-gradient(120% 120% at 18% 0%,rgba(39,245,212,.16),transparent 56%),
    linear-gradient(160deg,var(--panel),var(--ink));
}
.media-frame img{width:100%;height:100%;object-fit:cover;}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:4 / 5;}
.media-frame--square{aspect-ratio:1 / 1;}

/* ---------- 动效基类 ---------- */
html.has-js .reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .38s var(--ease),transform .38s var(--ease);
  transition-delay:calc(var(--i,0) * 70ms);
}
html.has-js .reveal.is-in{opacity:1;transform:none;}

/* =========================================================
   头部
   ========================================================= */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,28,24,.93);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(58,174,158,.3);
  color:var(--paper);
}
.header-inner{width:var(--shell);margin-inline:auto;}

.header-rail{
  border-bottom:1px solid rgba(58,174,158,.16);
  background-image:repeating-linear-gradient(90deg,rgba(39,245,212,.11) 0 1px,transparent 1px 56px);
}
.rail-inner{
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:.4rem 0;
  font-family:var(--font-mono);
  font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--mute);
}
.rail-index{display:inline-flex;align-items:center;gap:.55rem;white-space:nowrap;}
.rail-key{
  display:inline-block;
  padding:.06rem .4rem;border-radius:3px;
  background:var(--cyan);color:#04150F;
  font-weight:700;letter-spacing:.1em;
}
.rail-status{display:inline-flex;align-items:center;gap:.5rem;white-space:nowrap;}
.status-dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(39,245,212,.16),0 0 10px rgba(39,245,212,.7);
  animation:statusPulse 2.4s ease-in-out infinite;
}
@keyframes statusPulse{0%,100%{opacity:1;}50%{opacity:.35;}}

.header-bar{position:relative;}
.bar-inner{
  position:relative;
  display:flex;align-items:center;gap:clamp(.9rem,2.6vw,2.4rem);
  min-height:64px;padding:.6rem 0;
}

.brand{display:inline-flex;align-items:center;gap:.65rem;flex:0 0 auto;}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;flex:0 0 auto;
  border-radius:9px;
  background:linear-gradient(150deg,var(--cyan),#0E8E7B);
  color:#04150F;
  font-family:var(--font-display);font-weight:900;font-size:1.02rem;line-height:1;
  letter-spacing:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.08;}
.brand-name{font-family:var(--font-display);font-weight:900;font-size:1.02rem;color:var(--white);letter-spacing:.01em;}
.brand-sub{font-family:var(--font-mono);font-size:.6rem;letter-spacing:.26em;text-transform:uppercase;color:var(--edge);}
.version-badge{
  padding:.16rem .42rem;border-radius:4px;
  border:1px solid rgba(39,245,212,.5);
  font-family:var(--font-mono);font-size:.6rem;letter-spacing:.1em;
  color:var(--cyan);
}

.site-nav{display:flex;align-items:center;gap:1.4rem;margin-left:auto;}
.nav-list{display:flex;align-items:center;gap:clamp(.5rem,1.6vw,1.35rem);counter-reset:nav;}
.nav-link{
  position:relative;display:inline-block;
  padding:.45rem .1rem;
  font-size:.86rem;font-weight:500;
  color:var(--mute);
  transition:color .16s var(--ease);
}
.nav-link::before{
  counter-increment:nav;
  content:"0" counter(nav);
  margin-right:.34rem;
  font-family:var(--font-mono);font-size:.56rem;letter-spacing:.06em;
  color:var(--edge);
  vertical-align:.08em;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:.02rem;height:2px;
  background:var(--cyan);
  transform:scaleX(0);transform-origin:left;
  transition:transform .16s var(--ease);
}
.nav-link:hover{color:var(--paper);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{color:var(--cyan);}
.nav-link[aria-current="page"]::before{color:var(--cyan);}
.nav-link[aria-current="page"]::after{transform:scaleX(1);box-shadow:0 0 12px rgba(39,245,212,.65);}

.header-actions{display:flex;align-items:center;gap:.55rem;flex:0 0 auto;}
.nav-cta{display:none;}
.nav-toggle{
  display:none;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  width:42px;height:42px;
  border:1px solid rgba(58,174,158,.55);
  border-radius:10px;
  transition:border-color .16s var(--ease),background-color .16s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);background:rgba(39,245,212,.08);}
.nav-toggle-bar{
  display:block;width:18px;height:2px;border-radius:2px;
  background:var(--cyan);
  transition:transform .18s var(--ease),opacity .18s 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:0;right:0;bottom:0;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--gold));
  transform:scaleX(0);transform-origin:0 50%;
  pointer-events:none;
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{
  margin-top:clamp(4rem,10vw,8rem);
  padding:clamp(2.4rem,5vw,4.2rem) 0 2rem;
  background:
    radial-gradient(900px 380px at 82% 0%,rgba(39,245,212,.09),transparent 66%),
    #04120F;
  border-top:1px solid rgba(58,174,158,.32);
  color:var(--paper);
}
.footer-inner{width:var(--shell);margin-inline:auto;}

.footer-fn{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);
  gap:clamp(1rem,3vw,2.5rem);
  padding:clamp(1.2rem,3vw,2rem);
  border:1px solid rgba(39,245,212,.55);
  border-radius:var(--radius-l);
  background:rgba(18,58,50,.35);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  box-shadow:inset 0 0 0 1px rgba(39,245,212,.08),0 18px 48px rgba(0,0,0,.32);
}
.fn-title{font-size:clamp(1.1rem,2vw,1.5rem);letter-spacing:-.015em;color:var(--white);line-height:1.25;}
.fn-desc{margin-top:.6rem;max-width:32em;font-size:.9rem;line-height:1.68;color:var(--mute);}
.fn-links{display:flex;flex-direction:column;justify-content:center;gap:.5rem;}
.fn-link{
  display:flex;align-items:center;gap:.75rem;
  padding:.62rem .9rem;
  border:1px solid rgba(58,174,158,.35);
  border-radius:10px;
  font-size:.92rem;color:var(--paper);
  transition:border-color .16s var(--ease),color .16s var(--ease),background-color .16s var(--ease),transform .16s var(--ease);
}
.fn-link:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(39,245,212,.07);transform:translateX(3px);}
.fn-num{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.12em;color:var(--edge);}
.fn-link:hover .fn-num{color:var(--cyan);}

.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.6fr) minmax(0,.7fr) minmax(0,.7fr);
  gap:clamp(1.5rem,4vw,3rem);
  margin-top:clamp(2rem,4vw,3.4rem);
  padding-top:clamp(1.4rem,3vw,2.4rem);
  border-top:1px solid rgba(58,174,158,.22);
}
.footer-brand-line{
  display:flex;align-items:center;gap:.6rem;
  font-family:var(--font-display);font-weight:900;font-size:1.05rem;color:var(--white);
}
.footer-brand-desc{margin-top:.9rem;max-width:30em;font-size:.9rem;line-height:1.72;color:var(--mute);}
.footer-contact{margin-top:1.2rem;display:flex;flex-direction:column;gap:.5rem;font-style:normal;}
.contact-row{display:flex;align-items:baseline;gap:.7rem;font-family:var(--font-mono);font-size:.78rem;color:var(--paper);}
.contact-label{
  flex:0 0 auto;min-width:2.4em;
  font-size:.64rem;letter-spacing:.16em;text-transform:uppercase;color:var(--edge);
}
.footer-col-title{
  margin-bottom:1rem;
  font-family:var(--font-mono);font-size:.7rem;font-weight:600;
  letter-spacing:.2em;text-transform:uppercase;color:var(--edge);
}
.footer-links{display:flex;flex-direction:column;gap:.6rem;}
.footer-links a{font-size:.92rem;color:var(--paper);opacity:.86;transition:color .16s var(--ease),opacity .16s var(--ease);}
.footer-links a:hover{color:var(--cyan);opacity:1;}

.footer-legal{
  display:flex;flex-wrap:wrap;align-items:center;gap:.7rem 1.6rem;
  margin-top:clamp(1.8rem,4vw,2.8rem);
  padding-top:1.2rem;
  border-top:1px solid rgba(58,174,158,.22);
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;
  color:var(--mute);
}
.footer-icp{white-space:nowrap;}
.legal-links{display:flex;flex-wrap:wrap;gap:1.1rem;}
.legal-links a{color:var(--mute);transition:color .16s var(--ease);}
.legal-links a:hover{color:var(--cyan);}
.footer-copy{margin-left:auto;color:var(--edge);white-space:nowrap;}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1100px){
  .nav-link::before{display:none;}
  .nav-list{gap:.5rem;}
  .site-nav{gap:1rem;}
}

@media (max-width:920px){
  .nav-toggle{display:inline-flex;}
  .header-cta{display:none;}
  .header-actions{margin-left:auto;}
  .site-nav{
    position:absolute;top:100%;left:0;right:0;
    display:none;
    flex-direction:column;align-items:stretch;gap:0;
    margin-left:0;
    padding:.85rem clamp(.6rem,4vw,1.4rem) 1.3rem;
    background:linear-gradient(180deg,var(--panel),var(--ink));
    border-top:1px solid rgba(58,174,158,.45);
    border-bottom:1px solid rgba(58,174,158,.45);
    box-shadow:0 30px 60px rgba(0,0,0,.55);
    max-height:calc(100vh - 110px);
    overflow-y:auto;
    z-index:90;
  }
  .site-nav[data-open]{display:flex;}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;}
  .nav-link{
    display:block;
    padding:.9rem .3rem;
    font-size:1rem;
    color:var(--paper);
    border-bottom:1px solid rgba(58,174,158,.16);
  }
  .nav-link::before{display:inline-block;color:var(--edge);margin-right:.55rem;}
  .nav-link::after{display:none;}
  .nav-link[aria-current="page"]{color:var(--cyan);}
  .nav-link[aria-current="page"]::before{color:var(--cyan);}
  .nav-cta{display:inline-flex;justify-content:center;margin-top:1.1rem;}
  .bar-inner{min-height:60px;}

  .footer-fn{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-brand{grid-column:1 / -1;}

  .grid-12{grid-template-columns:1fr;}
  .grid-12 > *{grid-column:auto;}
}

@media (max-width:680px){
  body{font-size:16px;}
  .rail-inner{font-size:.62rem;letter-spacing:.1em;}
  .rail-status{display:none;}
  .brand-sub{letter-spacing:.18em;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-copy{margin-left:0;}
  .footer-legal{gap:.55rem 1.2rem;}
  .fn-link{font-size:.88rem;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .status-dot{animation:none;}
  html.has-js .reveal{opacity:1;transform:none;transition:none;}
  .btn:hover,.fn-link:hover{transform:none;}
}