@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Playfair+Display:wght@400;500;600;700&display=swap');

:root{
  --bg:#000000;
  --surface:#0b0b0d;
  --surface-2:#121212;
  --line:rgba(255,255,255,.11);
  --line-soft:rgba(255,255,255,.06);
  --ink:#f3f3f7;
  --body:#cdcdd8;
  --dim:#9b9baa;
  --neon:#57c7ff;
  --neon-dim:#4d5c74;
  --gold:#d8b46c;
  --mid:#0d1a2f;
  --r:18px;
  --pad:clamp(18px,4vw,44px);
  --serif:'Playfair Display',Georgia,'Songti SC',serif;
}

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

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

body{
  margin:0;
  background:var(--bg);
  color:var(--body);
  font:400 17px/1.75 'Inter',system-ui,-apple-system,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  letter-spacing:.012em;
  overflow-x:hidden;
}

a{color:var(--neon)}

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

div[id]{scroll-margin-top:104px}

/* ---------- 顶部细条 ---------- */
.ticker{
  border-bottom:1px solid var(--line-soft);
  background:linear-gradient(90deg,var(--mid),#000 62%);
  color:#b9d6ff;
  font-size:14px;
  letter-spacing:.34em;
  text-align:center;
  padding:9px 16px 8px;
  text-shadow:0 0 12px rgba(87,199,255,.45);
}

/* ---------- 页头 ---------- */
.masthead{
  position:sticky;
  top:0;
  z-index:40;
  display:grid;
  grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  align-items:center;
  gap:clamp(6px,2vw,26px);
  padding:10px var(--pad);
  background:rgba(0,0,0,.9);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}

.mast-nav{display:flex;flex-wrap:wrap;gap:4px}
.mast-nav.b{justify-content:flex-end}

.mast-nav a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 8px;
  color:var(--dim);
  text-decoration:none;
  font-size:16px;
  border-bottom:1px solid transparent;
  transition:color .2s,border-color .2s;
}
.mast-nav a:hover,
.mast-nav a:focus-visible{color:#fff;border-bottom-color:var(--neon)}

.brand{
  font-family:var(--serif);
  font-weight:600;
  font-size:clamp(1.1rem,2.3vw,1.55rem);
  letter-spacing:.1em;
  color:#fff;
  text-decoration:none;
  white-space:nowrap;
  text-shadow:0 0 20px rgba(87,199,255,.38);
}

/* ---------- 首屏 ---------- */
.stage{
  position:relative;
  min-height:100svh;
  display:grid;
  grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);
  align-items:center;
  gap:clamp(20px,4vw,56px);
  padding:clamp(28px,6vw,72px) var(--pad) clamp(64px,9vw,110px);
  overflow:hidden;
}

.stage::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:clamp(26px,6vw,64px);
  background:linear-gradient(90deg,var(--mid),rgba(87,199,255,.3) 42%,rgba(87,199,255,0) 82%);
  clip-path:polygon(0 62%,100% 0,100% 100%,0 100%);
  pointer-events:none;
}

.stage-copy{
  max-width:34ch;
  justify-self:center;
  text-align:center;
}

.stage h1{
  font-family:var(--serif);
  font-weight:600;
  font-size:clamp(2rem,5.1vw,3.5rem);
  line-height:1.16;
  letter-spacing:.012em;
  color:var(--ink);
  margin:.16em 0 .42em;
  text-shadow:0 0 26px rgba(87,199,255,.16);
}

.lede{
  margin:0;
  font-size:17px;
  line-height:1.8;
  color:var(--dim);
}

.stage-cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:48px;
  padding:0 28px;
  margin-top:24px;
  border:1px solid rgba(87,199,255,.45);
  border-radius:999px;
  background:radial-gradient(120% 150% at 50% 0%,rgba(87,199,255,.2),rgba(87,199,255,0) 72%);
  color:#dff1ff;
  text-decoration:none;
  font-size:16px;
  letter-spacing:.18em;
  transition:background .25s,color .25s,border-color .25s;
}
.stage-cta:hover,
.stage-cta:focus-visible{background:rgba(87,199,255,.22);color:#fff;border-color:var(--neon)}

.stage-art{
  position:relative;
  margin:0;
  width:100%;
  aspect-ratio:4/5;
  max-height:min(74svh,720px);
  border-radius:var(--r);
  border:1px solid var(--line);
  overflow:hidden;
  background:radial-gradient(82% 70% at 62% 18%,#16233c,#05070b 72%);
  box-shadow:0 26px 64px rgba(0,0,0,.72),inset 0 0 0 1px rgba(255,255,255,.04);
}

.stage-art img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  filter:brightness(.84) contrast(1.08);
}

.stage-art.is-rot img{
  position:absolute;
  inset:0;
  opacity:0;
  animation:heroFade 18s linear infinite;
}
.stage-art.is-rot img:nth-child(2){animation-delay:6s}
.stage-art.is-rot img:nth-child(3){animation-delay:12s}

@keyframes heroFade{
  0%{opacity:0}
  4%{opacity:1}
  28%{opacity:1}
  33%{opacity:0}
  100%{opacity:0}
}

.stage-void{
  display:block;
  width:100%;
  height:100%;
  background:
    repeating-linear-gradient(135deg,rgba(255,255,255,.05) 0 1px,transparent 1px 14px),
    radial-gradient(60% 50% at 50% 40%,rgba(87,199,255,.18),transparent 70%);
}

/* ---------- 主体骨架 ---------- */
.shell{
  display:grid;
  grid-template-columns:270px minmax(0,1fr);
  align-items:start;
  gap:clamp(24px,4vw,60px);
  max-width:1180px;
  margin:0 auto;
  padding:clamp(42px,7vw,84px) var(--pad);
}

/* ---------- 侧栏 ---------- */
.rail{
  position:sticky;
  top:104px;
  padding:20px 18px 22px;
  border:1px solid var(--line);
  border-radius:var(--r);
  background:linear-gradient(180deg,#0a0a0d,#070709);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.03);
}

.rail-kicker{
  display:block;
  font-size:14px;
  letter-spacing:.3em;
  color:var(--neon);
  text-shadow:0 0 10px rgba(87,199,255,.45);
  margin-bottom:4px;
}

.rail-title{
  font-family:var(--serif);
  font-weight:500;
  font-size:1.4rem;
  letter-spacing:.1em;
  color:var(--ink);
  margin:0 0 14px;
  padding-bottom:12px;
  border-bottom:1px solid var(--line-soft);
}

.rail-list{
  counter-reset:rail;
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:2px;
}
.rail-list li{counter-increment:rail}

.rail-list a{
  display:flex;
  align-items:baseline;
  gap:10px;
  min-height:44px;
  padding:10px 8px;
  border-left:2px solid transparent;
  border-radius:0 10px 10px 0;
  color:var(--dim);
  font-size:16px;
  text-decoration:none;
  transition:background .2s,color .2s,border-color .2s;
}
.rail-list a::before{
  content:counter(rail,decimal-leading-zero);
  font-size:13px;
  letter-spacing:.08em;
  color:var(--neon-dim);
}
.rail-list a:hover,
.rail-list a:focus-visible{background:#101018;color:#fff;border-left-color:var(--neon)}

/* ---------- 正文 ---------- */
.stream{min-width:0;max-width:74ch}

.stream > div{
  position:relative;
  padding-bottom:clamp(34px,5vw,58px);
  margin-bottom:clamp(30px,5vw,52px);
  border-bottom:1px solid var(--line);
}
.stream > div:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0}

.stream > div::after{
  content:"";
  position:absolute;
  left:0;bottom:-1px;
  width:58px;height:2px;
  background:linear-gradient(90deg,var(--neon),rgba(87,199,255,0));
}

.stream small,
.rail small{}

.stream h2,
.stream h3{
  font-family:var(--serif);
  font-weight:600;
  color:var(--ink);
  line-height:1.32;
  letter-spacing:.014em;
}

.stream h2{font-size:clamp(1.45rem,3vw,1.95rem);margin:.1em 0 .72em}
.stream h3{font-size:clamp(1.15rem,2.2vw,1.35rem);margin:1.5em 0 .6em}

.stream p{margin:0 0 1.08em;color:var(--body)}
.stream strong{color:#fff;font-weight:600}
.stream em{color:var(--gold);font-style:normal}

.stream ul,
.stream ol{padding-left:1.35em;margin:0 0 1.1em;color:var(--body)}
.stream li{margin:.42em 0}
.stream li::marker{color:var(--neon-dim)}

.stream a{
  color:var(--neon);
  text-decoration:none;
  border-bottom:1px solid rgba(87,199,255,.34);
}
.stream a:hover{border-bottom-color:var(--neon)}

.stream blockquote{
  margin:1.5em 0;
  padding:14px 20px;
  border-left:2px solid var(--gold);
  border-radius:0 var(--r) var(--r) 0;
  background:#0a0a0c;
  color:#dedee6;
}
.stream blockquote p:last-child{margin-bottom:0}

.stream figure{margin:1.5em 0}
.stream img{max-width:100%;height:auto;border-radius:var(--r);border:1px solid var(--line);display:block}
.stream hr{border:0;height:1px;background:var(--line);margin:2em 0}

.stream > div > small{
  display:block;
  font-size:14px;
  letter-spacing:.3em;
  color:var(--neon);
  text-shadow:0 0 10px rgba(87,199,255,.4);
  margin-bottom:6px;
}

/* ---------- 收尾 ---------- */
.coda{
  display:flex;
  justify-content:center;
  max-width:1180px;
  margin:0 auto;
  padding:0 var(--pad) clamp(48px,7vw,76px);
}

.top-link{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 24px;
  border:1px solid var(--line);
  border-radius:999px;
  color:var(--dim);
  font-size:16px;
  letter-spacing:.18em;
  text-decoration:none;
  transition:color .2s,border-color .2s;
}
.top-link:hover,
.top-link:focus-visible{color:#fff;border-color:var(--neon)}

/* ---------- 页脚 ---------- */
.foot{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,#000,#060a12);
  padding:clamp(34px,5vw,58px) var(--pad) 26px;
}

.foot-nav{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,4vw,48px);
  max-width:900px;
  margin:0 auto clamp(26px,4vw,42px);
}

.foot-nav dl{margin:0}
.foot-nav dt{
  font-family:var(--serif);
  font-size:15px;
  letter-spacing:.24em;
  color:var(--gold);
  margin-bottom:8px;
}
.foot-nav dd{margin:0}
.foot-nav a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  color:var(--dim);
  font-size:16px;
  text-decoration:none;
  transition:color .2s;
}
.foot-nav a:hover,
.foot-nav a:focus-visible{color:#fff}

.foot-note{
  margin:0;
  padding-top:20px;
  border-top:1px solid var(--line-soft);
  text-align:center;
  font-size:15px;
  letter-spacing:.16em;
  color:#6f6f7e;
}

/* ---------- 滚动显现 ---------- */
.reveal{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .62s ease,transform .62s ease;
}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:960px){
  .shell{grid-template-columns:1fr}
  .rail{position:static;order:0}
  .rail-list{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:860px){
  .masthead{grid-template-columns:1fr;row-gap:2px;padding:8px 14px}
  .brand{order:-1;justify-self:center;padding:8px 0}
  .mast-nav{justify-content:center;gap:2px}
  .mast-nav.b{justify-content:center}
  .mast-nav a{padding:0 7px}
  div[id]{scroll-margin-top:132px}

  .stage{
    grid-template-columns:1fr;
    min-height:auto;
    padding-top:30px;
    gap:26px;
  }
  .stage-copy{max-width:38ch}
  .stage-art{aspect-ratio:16/11;max-height:none;order:2}

  .shell{padding-top:36px}
  .foot-nav{grid-template-columns:repeat(auto-fit,minmax(130px,1fr))}
}

@media (max-width:420px){
  .rail-list{grid-template-columns:1fr}
  .ticker{font-size:13px;letter-spacing:.26em}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .stage-art.is-rot img{animation:none;opacity:1;position:relative}
  .stage-art.is-rot img:not(:first-child){display:none}
  .reveal{opacity:1;transform:none;transition:none}
}

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