@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@300;400;500;600;700&family=Noto+Sans:wght@300;400;500;600;700&display=swap');

:root{
  --ink:#0d0d0d;
  --ink-2:#131019;
  --ink-3:#1b1622;
  --purple:#8000ff;
  --magenta:#ff00ff;
  --green:#00ff9c;
  --fg:#ece7f6;
  --body:#d7d1e3;
  --dim:#a79db9;
  --line:rgba(128,0,255,.3);
  --rail:92px;
  --sans:"Be Vietnam Pro","Noto Sans",system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}

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

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

body{
  margin:0;
  padding-left:var(--rail);
  background-color:var(--ink);
  background-image:
    radial-gradient(58% 42% at 84% -6%,rgba(128,0,255,.20),transparent 70%),
    radial-gradient(46% 38% at -4% 100%,rgba(255,0,255,.13),transparent 72%);
  background-attachment:fixed;
  color:var(--body);
  font-family:var(--sans);
  font-size:17px;
  font-weight:400;
  line-height:1.72;
  overflow-x:hidden;
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:2;
  pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(0,0,0,.30) 0 1px,rgba(0,0,0,0) 1px 3px);
  opacity:.5;
}

menu,ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%}

::selection{background:var(--magenta);color:#0b0910}

/* ---------- 左侧固定竖排栏 ---------- */
.rail{
  position:fixed;
  left:0;
  top:0;
  bottom:0;
  z-index:40;
  width:var(--rail);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:space-between;
  padding:14px 0 18px;
  background:linear-gradient(180deg,#110b18,#09070e);
  border-right:1px solid var(--line);
}

.rail-brand{
  margin:0;
  writing-mode:vertical-rl;
  font-size:13px;
  font-weight:600;
  letter-spacing:.34em;
  color:var(--magenta);
  text-shadow:0 0 14px rgba(255,0,255,.55);
}

.rail-note{
  writing-mode:vertical-rl;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.22em;
  color:var(--dim);
}

.dock{width:100%;display:flex;justify-content:center}

.dock-trigger{
  position:relative;
  z-index:60;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:7px;
  min-width:46px;
  min-height:46px;
  padding:8px 4px;
  cursor:pointer;
  background:rgba(128,0,255,.12);
  border:1px solid var(--line);
}

.dock-trigger::-webkit-details-marker{display:none}

.dock-bars{
  position:relative;
  width:18px;
  height:2px;
  background:var(--magenta);
  box-shadow:0 0 10px rgba(255,0,255,.7);
  transition:background .2s ease;
}
.dock-bars::before,
.dock-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  background:var(--magenta);
  transition:transform .2s ease,top .2s ease;
}
.dock-bars::before{top:-6px}
.dock-bars::after{top:6px}
.dock[open] .dock-bars{background:transparent;box-shadow:none}
.dock[open] .dock-bars::before{top:0;transform:rotate(45deg)}
.dock[open] .dock-bars::after{top:0;transform:rotate(-45deg)}

.dock-word{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--dim);
}

.dock-panel{
  position:fixed;
  inset:0;
  z-index:50;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:clamp(16px,4vw,56px);
  padding:clamp(64px,8vw,96px) clamp(22px,6vw,80px);
  overflow:auto;
  background:rgba(9,7,13,.975);
  backdrop-filter:blur(4px);
}

.dock-col{display:flex;flex-direction:column;gap:2px}
.dock-col--l{align-items:flex-end;text-align:right}

.dock-col a{
  display:block;
  padding:.26em .18em;
  min-height:44px;
  font-size:clamp(20px,3vw,32px);
  font-weight:600;
  letter-spacing:-.01em;
  color:var(--fg);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s ease,transform .18s ease,border-color .18s ease;
}
.dock-col a:hover,
.dock-col a:focus-visible{
  color:var(--magenta);
  border-bottom-color:var(--magenta);
  transform:translateX(2px);
  text-shadow:0 0 16px rgba(255,0,255,.65);
}

.dock-mark{
  margin:0;
  writing-mode:vertical-rl;
  font-size:clamp(13px,1.5vw,17px);
  font-weight:600;
  letter-spacing:.3em;
  color:var(--purple);
  text-shadow:0 0 18px rgba(128,0,255,.8);
}

/* ---------- 主区 ---------- */
main{display:block}

main > section{
  padding:clamp(28px,4.6vw,54px) clamp(20px,5vw,64px);
  border-bottom:1px solid var(--line);
  scroll-margin-top:82px;
}
main > section:nth-of-type(even){
  background:linear-gradient(180deg,rgba(128,0,255,.06),rgba(128,0,255,0) 62%);
}

main h2{
  margin:0 0 16px;
  padding-left:14px;
  border-left:3px solid var(--magenta);
  font-size:clamp(22px,3.1vw,31px);
  line-height:1.28;
  letter-spacing:-.01em;
  color:var(--fg);
  font-weight:600;
}
main h3{
  margin:24px 0 10px;
  font-size:clamp(18px,2.4vw,22px);
  line-height:1.35;
  color:#f6f2ff;
  font-weight:600;
}

main p{margin:0 0 16px;max-width:72ch;color:var(--body)}
main ul,main ol{margin:0 0 18px;padding-left:1.25em;max-width:72ch}
main ul{list-style:square}
main ol{list-style:decimal}
main li{margin:0 0 8px}
main li::marker{color:var(--magenta)}

main a{color:var(--green);text-decoration:none;border-bottom:1px solid rgba(0,255,156,.45)}
main a:hover{color:#fff;background:rgba(0,255,156,.14)}

main strong{color:#fff;font-weight:600}
main em{color:var(--green);font-style:normal}

main blockquote{
  margin:0 0 18px;
  padding:12px 16px;
  background:var(--ink-3);
  border-left:3px solid var(--purple);
  color:#e4dff0;
}
main blockquote p:last-child{margin:0}

main table{width:100%;border-collapse:collapse;margin:0 0 20px;font-size:16px}
main th,main td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
main th{color:#fff;background:rgba(128,0,255,.14)}

main code,main pre{font-family:var(--mono);font-size:.94em}
main code{background:rgba(128,0,255,.18);padding:1px 5px;color:#f0e9ff}
main pre{padding:14px;background:var(--ink-3);overflow:auto;margin:0 0 18px}

.eyebrow{
  display:block;
  margin:0 0 8px;
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.3em;
  color:var(--green);
  text-shadow:0 0 12px rgba(0,255,156,.5);
}
main > section > small{
  display:block;
  margin:0 0 8px;
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.3em;
  color:var(--green);
}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;
  overflow:hidden;
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  align-items:center;
  gap:clamp(20px,4vw,48px);
  min-height:45vh;
  border-bottom:1px solid var(--line);
}

.hero-ghost{
  position:absolute;
  right:-.04em;
  top:-.14em;
  font-family:var(--mono);
  font-size:clamp(120px,24vw,320px);
  line-height:.8;
  letter-spacing:-.05em;
  color:rgba(128,0,255,.17);
  pointer-events:none;
}

.hero-copy{position:relative;z-index:1}

.hero-kicker{
  margin:0 0 12px;
  font-family:var(--mono);
  font-size:14px;
  letter-spacing:.24em;
  color:var(--green);
}

.hero-title{
  position:relative;
  margin:0 0 16px;
  font-size:clamp(30px,5.4vw,58px);
  line-height:1.14;
  letter-spacing:-.025em;
  font-weight:700;
  color:#fdfbff;
  text-shadow:0 0 26px rgba(255,0,255,.4);
}
.hero-title::before,
.hero-title::after{
  content:attr(data-text);
  position:absolute;
  left:0;
  top:0;
  width:100%;
  pointer-events:none;
}
.hero-title::before{color:var(--magenta);clip-path:inset(0 0 56% 0);animation:glitch-a 5.4s infinite steps(2,end)}
.hero-title::after{color:var(--green);clip-path:inset(60% 0 0 0);animation:glitch-b 6.2s infinite steps(2,end)}

@keyframes glitch-a{
  0%,86%,100%{transform:translate(0,0)}
  88%{transform:translate(-3px,-2px)}
  92%{transform:translate(2px,1px)}
  96%{transform:translate(-1px,2px)}
}
@keyframes glitch-b{
  0%,82%,100%{transform:translate(0,0)}
  85%{transform:translate(3px,2px)}
  90%{transform:translate(-2px,-1px)}
  95%{transform:translate(1px,-2px)}
}

.hero-lead{margin:0 0 22px;max-width:46ch;color:#cfc8dd;font-size:17px}

.hero-jump{display:flex;flex-wrap:wrap;gap:12px}

.btn{
  display:inline-flex;
  align-items:center;
  min-height:46px;
  padding:10px 20px;
  background:var(--purple);
  border:1px solid var(--magenta);
  color:#fff;
  font-weight:600;
  font-size:16px;
  text-decoration:none;
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  transition:background .18s ease,color .18s ease;
}
.btn:hover{background:var(--magenta);color:#0b0910}
.btn--ghost{background:transparent;color:var(--magenta)}
.btn--ghost:hover{background:rgba(255,0,255,.16);color:#fff}

.hero-figure,
.hud-figure{
  position:relative;
  margin:0;
  background:var(--ink-3);
  overflow:hidden;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%);
}
.hero-figure{aspect-ratio:4/3}
.hero-figure img,
.hud-figure img{display:block;width:100%;height:100%;object-fit:cover;filter:saturate(1.12) contrast(1.05)}
.hero-media{width:100%;height:100%;object-fit:cover}

.hero-plate,
.hud-plate{
  width:100%;
  height:100%;
  min-height:200px;
  background:
    repeating-linear-gradient(90deg,rgba(128,0,255,.22) 0 1px,transparent 1px 22px),
    repeating-linear-gradient(0deg,rgba(255,0,255,.16) 0 1px,transparent 1px 22px),
    linear-gradient(140deg,#1d1230,#0b0910);
}

/* ---------- 面板区 ---------- */
.hud{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.08fr) minmax(0,.78fr);
  gap:clamp(18px,3vw,36px);
  align-items:start;
  background:var(--ink-2);
}

.hud-figure{aspect-ratio:3/2}

.hud-copy p:last-child{margin-bottom:0}

.hud-aside{
  padding:16px;
  background:#0a0810;
  border-top:2px solid var(--magenta);
}
.hud-aside h2{font-size:19px;padding-left:0;border-left:0;margin-bottom:12px}

.hud-list li + li{margin-top:2px}
.hud-list a{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:8px 6px;
  font-family:var(--mono);
  font-size:15px;
  color:#ded7ec;
  text-decoration:none;
  border-bottom:1px dashed rgba(128,0,255,.35);
}
.hud-list a:hover{color:var(--magenta);background:rgba(255,0,255,.1)}

/* ---------- 页脚 ---------- */
.foot{
  padding:clamp(28px,4.6vw,48px) clamp(20px,5vw,64px) 22px;
  background:#08060d;
  border-top:1px solid var(--line);
}

.foot-mark{
  margin:0 0 20px;
  overflow:hidden;
  white-space:nowrap;
  font-size:clamp(40px,10.5vw,118px);
  line-height:.92;
  font-weight:700;
  letter-spacing:-.035em;
  color:rgba(255,0,255,.15);
  -webkit-text-stroke:1px rgba(255,0,255,.55);
}

.foot-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 20px;
}

.foot-logo{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  color:var(--fg);
  font-weight:600;
  text-decoration:none;
}
.foot-logo img{display:block;width:26px;height:26px}

.foot-nav ul{display:flex;flex-wrap:wrap;gap:0 2px}
.foot-nav a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:6px 9px;
  font-family:var(--mono);
  font-size:15px;
  color:var(--dim);
  text-decoration:none;
}
.foot-nav a:hover{color:var(--magenta)}

.foot-legal{flex:1 1 220px;text-align:center;font-size:15px;color:var(--dim)}
.foot-legal p{margin:0}

/* ---------- 滚动显现 ---------- */
.js [data-reveal],
.js main > section{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .68s ease,transform .68s cubic-bezier(.2,.7,.2,1);
}
.js [data-reveal].is-in,
.js main > section.is-in{opacity:1;transform:none}

.js .hud-list li:nth-child(1) a{transition-delay:.02s}
.js .hud-list li:nth-child(2) a{transition-delay:.06s}
.js .hud-list li:nth-child(3) a{transition-delay:.1s}
.js .hud-list li:nth-child(4) a{transition-delay:.14s}
.js .hud-list li:nth-child(5) a{transition-delay:.18s}
.js .hud-list li:nth-child(6) a{transition-delay:.22s}
.js .hud-list li:nth-child(7) a{transition-delay:.26s}

/* ---------- 窄屏 ---------- */
@media (max-width:900px){
  :root{--rail:0px}
  body{padding-left:0;padding-top:64px}
  body::after{opacity:.38}

  .rail{
    top:0;left:0;right:0;bottom:auto;
    width:auto;height:64px;
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    padding:0 12px;
    border-right:0;
    border-bottom:1px solid var(--line);
  }
  .rail-brand{writing-mode:horizontal-tb;font-size:16px;letter-spacing:.16em}
  .rail-note{display:none}
  .dock{width:auto;display:block}

  .dock-panel{
    grid-template-columns:1fr;
    align-content:start;
    gap:6px;
    padding:78px 20px 32px;
  }
  .dock-mark{
    writing-mode:horizontal-tb;
    text-align:center;
    font-size:13px;
    letter-spacing:.3em;
    margin:0 0 10px;
    padding-bottom:10px;
    border-bottom:1px solid var(--line);
  }
  .dock-col,
  .dock-col--l{align-items:stretch;text-align:left}
  .dock-col a{font-size:19px;min-height:48px;border-bottom:1px solid rgba(128,0,255,.22)}

  .hero{grid-template-columns:1fr;min-height:0;padding:26px 18px 30px;gap:18px}
  .hero-ghost{font-size:140px;opacity:.85}
  .hero-title{font-size:clamp(28px,7.8vw,40px)}
  .hero-figure{aspect-ratio:16/10}

  main > section{padding:26px 18px;scroll-margin-top:74px}
  .hud{grid-template-columns:1fr;padding:26px 18px}
  .hud-aside{order:3}
  .hud-figure{aspect-ratio:16/10}

  .foot{padding:26px 18px 20px}
  .foot-mark{margin-bottom:16px}
  .foot-row{flex-direction:column;align-items:stretch;text-align:center}
  .foot-logo{justify-content:center}
  .foot-nav ul{justify-content:center}
  .foot-legal{margin-left:0}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js [data-reveal],
  .js main > section{opacity:1;transform:none;transition:none}
  .hero-title::before,
  .hero-title::after{animation:none}
}

button[aria-expanded]{min-width:44px;min-height:44px}