:root{
  --ink:#0A1428;
  --panel:#0F1F3D;
  --panel-2:#13294F;
  --cyan:#00E5C8;
  --cyan-soft:#7CF7E6;
  --amber:#FF8A3D;
  --amber-soft:#FFC48A;
  --text:#E8F1FF;
  --muted:#93A7C4;
  --line:#2A3F63;
  --violet:#B79CFF;

  --font-display:"Inter","Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --r-sm:8px;
  --r-md:12px;
  --r-lg:18px;
  --r-pill:999px;
  --shell:1200px;
  --pad-y:clamp(2.5rem,6vw,4.5rem);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-break:900px;
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:9.5rem;
}
html.nav-open{overflow:hidden}

body{
  margin:0;
  min-height:100vh;
  background:
    radial-gradient(1100px 560px at 8% -12%,rgba(0,229,200,.10),transparent 62%),
    radial-gradient(900px 520px at 102% 4%,rgba(183,156,255,.09),transparent 64%),
    var(--ink);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}

img,svg{display:block;max-width:100%}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p,figure{margin:0}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select{font:inherit;color:inherit}

a{color:var(--cyan-soft);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--cyan)}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.18;letter-spacing:-.01em}
strong{font-weight:600}

/* ---------- 排版工具 ---------- */
.display{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(2.6rem,8.5vw,6.5rem);
  line-height:.98;
  letter-spacing:-.02em;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:.55rem;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;flex:0 0 auto}
.index-label{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);
  font-variant-numeric:tabular-nums;
}
.text-muted{color:var(--muted)}
.text-cyan{color:var(--cyan)}
.text-amber{color:var(--amber)}
.text-violet{color:var(--violet)}

/* ---------- 布局 ---------- */
.shell{width:min(var(--shell),100% - 2.5rem);margin-inline:auto}
.section{padding-block:var(--pad-y)}
.section__title{font-size:clamp(1.75rem,3.5vw,2.25rem);letter-spacing:-.015em}
.section__lead{margin-top:.75rem;color:var(--muted);max-width:62ch}

.grid{display:grid;gap:clamp(1rem,2.5vw,1.75rem)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(270px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}

.prose{max-width:68ch;font-size:1rem}
.prose p{margin-bottom:1.15em}
.prose p:last-child{margin-bottom:0}
.prose h2{font-size:clamp(1.5rem,3vw,2rem);margin:2em 0 .6em}
.prose h3{font-size:1.15rem;margin:1.6em 0 .5em}
.prose ul,.prose ol{margin:0 0 1.15em;padding-left:1.2em;list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin-bottom:.4em}
.prose a{color:var(--cyan-soft);text-decoration:underline;text-underline-offset:3px}
.prose strong{color:var(--text)}

/* ---------- 通用组件 ---------- */
.card{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:clamp(1.1rem,2.5vw,1.6rem);
  transition:border-color .24s var(--ease),transform .24s var(--ease);
}
.card:hover{border-color:rgba(0,229,200,.45);transform:translateY(-2px)}

.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.7rem 1.25rem;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  background:var(--panel-2);
  color:var(--text);
  font-size:.9rem;font-weight:600;
  transition:background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
}
.btn:hover{color:var(--text);border-color:var(--cyan);background:rgba(0,229,200,.1)}
.btn--primary{background:var(--cyan);border-color:var(--cyan);color:var(--ink)}
.btn--primary:hover{background:var(--cyan-soft);border-color:var(--cyan-soft);color:var(--ink)}
.btn--amber{background:var(--amber);border-color:var(--amber);color:var(--ink)}
.btn--amber:hover{background:var(--amber-soft);border-color:var(--amber-soft);color:var(--ink)}
.btn--ghost{background:transparent}
.btn--ghost:hover{background:rgba(0,229,200,.08)}

.tag{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.2rem .65rem;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;
  color:var(--muted);white-space:nowrap;
}
.tag--cyan{color:var(--cyan);border-color:rgba(0,229,200,.4)}
.tag--amber{color:var(--amber);border-color:rgba(255,138,61,.45)}
.tag--violet{color:var(--violet);border-color:rgba(183,156,255,.4)}

.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;
  padding-block:.9rem;
  font-family:var(--font-mono);font-size:12px;color:var(--muted);
}
.crumbs__item{display:inline-flex;align-items:center;gap:.5rem}
.crumbs__item::after{content:"/";color:var(--line)}
.crumbs__item:last-child::after{content:""}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--cyan)}

/* ---------- 可复用图片容器（页面阶段放占位） ---------- */
.media{
  position:relative;isolation:isolate;overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:
    radial-gradient(120% 90% at 20% 0%,rgba(0,229,200,.14),transparent 60%),
    linear-gradient(150deg,var(--panel-2),var(--panel) 58%,#0B1830);
}
.media img{width:100%;height:100%;object-fit:cover}
.media--portrait{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media--wide{aspect-ratio:16/9}
.media--tall{aspect-ratio:9/16}
.media__frame{
  position:absolute;inset:10px;
  border:1px solid rgba(0,229,200,.18);
  border-radius:calc(var(--r-md) - 4px);
  pointer-events:none;
}
.media__cap{
  position:absolute;left:0;right:0;bottom:0;
  padding:.8rem .95rem .7rem;
  font-size:.78rem;color:var(--text);
  background:linear-gradient(180deg,transparent,rgba(10,20,40,.92));
}

/* ---------- 头部 ---------- */
.skip-link{
  position:absolute;left:.75rem;top:-120px;z-index:200;
  padding:.6rem 1.1rem;
  border-radius:var(--r-pill);
  background:var(--cyan);color:var(--ink);
  font-size:.85rem;font-weight:600;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:.75rem;color:var(--ink)}

.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(10,20,40,.93);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.scroll-progress{
  position:absolute;left:0;bottom:-1px;z-index:2;
  height:2px;width:var(--progress-value,0%);max-width:100%;
  background:linear-gradient(90deg,var(--cyan),var(--violet));
  transition:width .12s linear;
  pointer-events:none;
}

/* 状态核对条 */
.status-strip{
  border-bottom:1px solid rgba(42,63,99,.65);
  background:linear-gradient(90deg,rgba(19,41,79,.88),rgba(15,31,61,.5) 62%,rgba(10,20,40,.35));
}
.status-strip__inner{display:flex;align-items:center;gap:1rem;padding:.45rem 0}
.status-strip__label{
  flex:0 0 auto;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--amber);
}
.status-strip__list{display:flex;align-items:center;flex-wrap:wrap;gap:.3rem}

.status-chip{position:relative}
.status-chip__btn{
  display:inline-flex;align-items:center;gap:.45rem;
  padding:.28rem .7rem;
  border:1px solid rgba(42,63,99,.9);
  border-radius:var(--r-pill);
  background:rgba(10,20,40,.55);
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.status-chip__btn:hover{border-color:rgba(0,229,200,.5);background:rgba(0,229,200,.07)}
.status-chip__btn::after{
  content:"";width:0;height:0;
  border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid var(--muted);
  transition:transform .24s var(--ease);
}
.status-chip__btn[aria-expanded="true"]{border-color:var(--cyan);background:rgba(0,229,200,.1)}
.status-chip__btn[aria-expanded="true"]::after{transform:rotate(180deg);border-top-color:var(--cyan)}
.status-chip__key{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--muted);
}
.status-chip__val{
  font-family:var(--font-mono);font-size:11.5px;color:var(--cyan-soft);
  white-space:nowrap;font-variant-numeric:tabular-nums;
}
.status-chip--amber .status-chip__val{color:var(--amber-soft)}
.status-chip--amber .status-chip__btn:hover{border-color:rgba(255,138,61,.55);background:rgba(255,138,61,.08)}
.status-chip--amber .status-chip__btn[aria-expanded="true"]{border-color:var(--amber);background:rgba(255,138,61,.12)}

.status-chip__panel{
  display:block;
  margin-top:.5rem;
  padding:.65rem .85rem .7rem;
  border-left:2px solid var(--amber);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  background:rgba(255,138,61,.08);
  font-size:.8rem;line-height:1.65;color:var(--muted);
}
.status-chip__panel[hidden]{display:none}
.status-chip__time{
  margin-top:.4rem;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.06em;color:var(--amber);
}

/* 品牌行 */
.header-bar{
  display:flex;align-items:center;justify-content:space-between;gap:2rem;
  padding:.7rem 0;
  transition:padding .24s var(--ease);
}
.site-header[data-scrolled] .header-bar{padding:.35rem 0}

.brand{display:flex;align-items:center;gap:.7rem;color:var(--text);flex:0 0 auto}
.brand:hover{color:var(--text)}
.brand__mark{
  position:relative;flex:0 0 auto;
  width:34px;height:34px;border-radius:50%;
  border:1.5px solid var(--cyan);
}
.brand__mark::before{
  content:"";position:absolute;inset:6px;border-radius:50%;
  border:1px dashed rgba(42,63,99,1);
}
.brand__mark::after{
  content:"";position:absolute;left:50%;top:50%;
  width:6px;height:6px;background:var(--amber);
  transform:translate(-50%,-50%) rotate(45deg);
}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__name{font-family:var(--font-display);font-weight:700;font-size:1.12rem;letter-spacing:-.01em}
.brand__meta{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);
}

/* 移动按钮 */
.nav-toggle{
  display:none;align-items:center;gap:.5rem;
  padding:.45rem .85rem;
  border:1px solid var(--line);border-radius:var(--r-pill);
  font-size:.82rem;color:var(--text);
}
.nav-toggle:hover{border-color:var(--cyan)}
.nav-toggle__bars{position:relative;width:16px;height:10px;flex:0 0 auto}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:100%;height:1.5px;background:var(--cyan);
  transition:transform .24s var(--ease),top .24s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{top:8px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:4px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:4px;transform:rotate(-45deg)}
.nav-toggle__text{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--muted)}

/* 导航 */
.site-nav{display:flex;align-items:center;gap:1.5rem}
.site-nav__list{display:flex;align-items:center;gap:.25rem;counter-reset:nav}
.site-nav__item{counter-increment:nav}
.site-nav__link{
  display:inline-flex;align-items:baseline;gap:.4rem;
  padding:.45rem .72rem;
  border:1px solid transparent;border-radius:var(--r-pill);
  color:var(--text);font-size:.9rem;
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.site-nav__link::before{
  content:counter(nav,decimal-leading-zero);
  font-family:var(--font-mono);font-size:10px;color:var(--muted);
  font-variant-numeric:tabular-nums;
}
.site-nav__link:hover{color:var(--cyan);border-color:var(--line);background:rgba(0,229,200,.07)}
.site-nav__link[aria-current="page"]{color:var(--ink);background:var(--cyan);border-color:var(--cyan)}
.site-nav__link[aria-current="page"]::before{color:rgba(10,20,40,.55)}
.site-nav__foot{display:none}

.nav-scrim{
  position:fixed;inset:0;z-index:85;
  background:rgba(4,10,22,.68);
  -webkit-backdrop-filter:blur(2px);
  backdrop-filter:blur(2px);
  opacity:0;pointer-events:none;
  transition:opacity .24s var(--ease);
}
.nav-scrim[data-open]{opacity:1;pointer-events:auto}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:clamp(3rem,8vw,6rem);
  padding-top:clamp(2rem,5vw,3.25rem);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(15,31,61,.45),rgba(10,20,40,1));
}

.dock{
  position:sticky;bottom:.75rem;z-index:25;
  display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));
  gap:.75rem;
  margin-bottom:clamp(2rem,5vw,3.5rem);
  padding:clamp(.75rem,2vw,1rem);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:rgba(19,41,79,.72);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.dock__link{
  display:flex;align-items:center;justify-content:space-between;gap:.75rem;
  padding:.9rem 1.1rem;
  border:1px solid var(--line);border-radius:var(--r-sm);
  background:var(--panel-2);
  color:var(--text);font-size:.95rem;font-weight:600;
  transition:border-color .22s var(--ease),background .22s var(--ease),transform .22s var(--ease);
}
.dock__link::after{content:"→";font-family:var(--font-mono);color:var(--cyan)}
.dock__link:hover{border-color:var(--cyan);background:rgba(0,229,200,.1);color:var(--text);transform:translateY(-2px)}
.dock__link--amber{border-color:rgba(255,138,61,.42)}
.dock__link--amber::after{color:var(--amber)}
.dock__link--amber:hover{border-color:var(--amber);background:rgba(255,138,61,.12)}

.footer-grid{
  display:grid;gap:clamp(1.5rem,3vw,2.5rem);
  padding-bottom:clamp(1.75rem,4vw,2.75rem);
  border-bottom:1px solid rgba(42,63,99,.7);
}
.footer-brand__note{margin-top:1rem;max-width:34ch;font-size:.88rem;color:var(--muted)}

.footer-col__title{
  display:flex;align-items:center;gap:.5rem;
  margin-bottom:.85rem;
  font-family:var(--font-display);font-size:.95rem;font-weight:700;letter-spacing:.02em;
  color:var(--text);
}
.footer-col__title::before{
  content:"";flex:0 0 auto;width:6px;height:6px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 0 3px rgba(0,229,200,.16);
}
.footer-col__list li + li{margin-top:.5rem}
.footer-col__list a{
  display:inline-flex;align-items:center;gap:.4rem;
  font-size:.9rem;color:var(--muted);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-col__list a:hover{color:var(--cyan);transform:translateX(2px)}

.footer-contact{
  display:grid;gap:.35rem;
  padding:clamp(1.25rem,3vw,1.75rem) 0;
  border-bottom:1px solid rgba(42,63,99,.7);
  font-size:.88rem;
}
.footer-contact__row{display:flex;flex-wrap:wrap;gap:.35rem .85rem}
.footer-contact__key{
  min-width:3.4rem;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--amber);
}
.footer-contact__val{color:var(--muted)}

.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:.75rem 1.5rem;
  padding:1.35rem 0 2.25rem;
}
.footer-base__meta{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.04em;color:var(--muted);
  font-variant-numeric:tabular-nums;
}
.legal-links{display:flex;flex-wrap:wrap;gap:.5rem 1.25rem;font-size:12.5px}
.legal-links a{color:var(--muted)}
.legal-links a:hover{color:var(--cyan)}

.to-top{
  position:fixed;right:1rem;bottom:4.5rem;z-index:70;
  display:grid;place-items:center;
  width:44px;height:44px;
  border:1px solid var(--line);border-radius:50%;
  background:rgba(19,41,79,.92);
  color:var(--cyan);font-family:var(--font-mono);font-size:1rem;
  opacity:0;pointer-events:none;transform:translateY(10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),border-color .24s var(--ease);
}
.to-top.is-visible{opacity:1;pointer-events:auto;transform:none}
.to-top:hover{border-color:var(--cyan)}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .32s ease-out,transform .32s ease-out}
.reveal.is-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1 !important;transform:none !important}
}

/* ---------- 桌面状态面板浮层 ---------- */
@media (min-width:901px){
  .status-chip__panel{
    position:absolute;left:0;top:calc(100% + .7rem);z-index:5;
    width:min(340px,42vw);
    margin-top:0;
    border:1px solid var(--line);border-left:2px solid var(--amber);
    border-radius:0 var(--r-sm) var(--r-sm) 0;
    background:var(--panel-2);
    box-shadow:0 20px 45px rgba(4,10,22,.55);
  }
}

/* ---------- 平板/移动断点 ---------- */
@media (max-width:960px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:961px){
  .footer-grid{grid-template-columns:minmax(230px,1.5fr) repeat(4,minmax(0,1fr))}
}

@media (max-width:900px){
  .status-strip__inner{flex-direction:column;align-items:stretch;gap:.45rem;padding:.55rem 0 .65rem}
  .status-strip__list{display:grid;grid-template-columns:1fr 1fr;gap:.3rem}
  .status-chip__btn{width:100%;justify-content:space-between;padding:.32rem .6rem}
  .status-chip__val{overflow:hidden;text-overflow:ellipsis}

  .header-bar{gap:1rem;padding:.6rem 0}
  .nav-toggle{display:inline-flex}

  .site-nav{
    position:fixed;top:0;right:0;bottom:0;z-index:90;
    width:min(86vw,340px);
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    padding:clamp(6rem,22vh,9rem) 1.25rem 1.5rem;
    background:linear-gradient(180deg,var(--panel-2),var(--panel));
    border-left:1px solid var(--line);
    transform:translateX(102%);
    transition:transform .32s var(--ease);
    overflow-y:auto;
  }
  .site-nav[data-open]{transform:translateX(0)}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__item{border-bottom:1px solid rgba(42,63,99,.55)}
  .site-nav__link{
    width:100%;justify-content:flex-start;
    padding:.85rem .5rem;
    border:0;border-radius:0;
    font-size:1rem;
  }
  .site-nav__link[aria-current="page"]{
    background:rgba(0,229,200,.12);
    color:var(--cyan);
    box-shadow:inset 3px 0 0 var(--cyan);
  }
  .site-nav__link[aria-current="page"]::before{color:var(--cyan)}
  .site-nav__foot{
    display:block;margin-top:auto;
    padding-top:1rem;
    border-top:1px solid var(--line);
    font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--muted);
  }
}

@media (max-width:640px){
  .shell{width:min(var(--shell),100% - 1.5rem)}
  .status-strip__label{display:none}
  .brand__meta{display:none}
  .footer-grid{grid-template-columns:1fr}
  .footer-base{flex-direction:column;align-items:flex-start}
  .to-top{right:.75rem;bottom:5rem}
}