:root{
  --pink:#ff0080;--magenta:#ff00ff;--ink:#26171f;--bg:#0f080d;
  --fg:#f7eef4;--dim:#c9b2c1;--line:rgba(255,0,128,.22);--rad:4px;
  --fdisp:'Russo One','Chakra Petch',"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --fbody:'Chakra Petch',"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--fg);font-family:var(--fbody);
  font-size:17px;line-height:1.75;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%}
a{color:#ff4dab;text-underline-offset:3px}
h1,h2,h3,h4{font-family:var(--fdisp);font-weight:400;line-height:1.22;margin:0 0 .55em}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.25em}
::selection{background:var(--magenta);color:#12070f}
:focus-visible{outline:2px solid var(--magenta);outline-offset:3px}

/* ---------- 顶部两行 ---------- */
.mast{
  position:sticky;top:0;z-index:60;
  background:rgba(15,8,13,.88);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.mast::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,var(--pink),var(--magenta),transparent);opacity:.85;
}
.mast-brand{display:flex;padding:8px clamp(12px,4vw,32px) 4px}
.brand{
  display:inline-flex;align-items:center;min-height:40px;padding:6px 2px;
  font-family:var(--fdisp);font-size:16px;letter-spacing:.34em;text-indent:.34em;
  color:#fff;text-decoration:none;text-shadow:0 0 16px rgba(255,0,255,.75);
}
.brand:hover{color:#ffd6ec}
.mast-menu{display:flex;overflow-x:auto;overscroll-behavior-x:contain;scrollbar-width:none}
.mast-menu::-webkit-scrollbar{display:none}
.mast-menu nav{min-width:100%}
.mast-menu ul{display:flex;align-items:stretch;gap:2px;list-style:none;margin:0;padding:0 clamp(6px,3vw,26px)}
.mast-menu a{
  display:flex;align-items:center;min-height:44px;padding:0 12px;
  font-size:16px;color:var(--dim);text-decoration:none;white-space:nowrap;
  border-bottom:2px solid transparent;
}
.mast-menu a:hover,.mast-menu a:focus-visible{
  color:#fff;border-bottom-color:var(--magenta);
  background:linear-gradient(180deg,rgba(255,0,128,0),rgba(255,0,128,.2));
}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;isolation:isolate;overflow:hidden;
  min-height:100vh;min-height:100svh;
  display:grid;align-content:center;
  padding:clamp(96px,15vh,170px) clamp(18px,6vw,72px) clamp(52px,9vh,100px);
}
.hero-mesh{
  position:absolute;inset:-25%;z-index:-2;
  background:
    radial-gradient(38% 40% at 22% 26%,rgba(255,0,128,.62),transparent 62%),
    radial-gradient(36% 46% at 78% 18%,rgba(255,0,255,.5),transparent 66%),
    radial-gradient(52% 48% at 62% 82%,rgba(255,0,128,.4),transparent 64%),
    radial-gradient(40% 40% at 12% 84%,rgba(255,0,255,.34),transparent 62%),
    conic-gradient(from 200deg at 45% 50%,#26171f,#451035,#26171f,#5a0c3c,#26171f);
  filter:blur(34px) saturate(150%);
  animation:mesh 26s ease-in-out infinite alternate;
}
@keyframes mesh{
  from{transform:translate3d(0,0,0) scale(1.05) rotate(0deg)}
  to{transform:translate3d(-3%,2%,0) scale(1.18) rotate(5deg);filter:blur(42px) hue-rotate(40deg) saturate(170%)}
}
.hero::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:radial-gradient(122% 92% at 50% 50%,transparent 38%,rgba(15,8,13,.88) 100%);
}
.hero-ghost{
  position:absolute;right:-4vw;top:7%;z-index:-1;margin:0;
  font-family:var(--fdisp);font-size:clamp(90px,20vw,240px);line-height:.9;
  color:transparent;-webkit-text-stroke:1px rgba(255,0,255,.32);
  white-space:nowrap;pointer-events:none;user-select:none;
}
.hero-inner{position:relative;z-index:3;max-width:62%}
.hero h1{
  margin:0;font-size:clamp(40px,7.4vw,92px);line-height:1.06;letter-spacing:.01em;color:#fff;
  text-shadow:0 0 26px rgba(255,0,128,.55),0 0 70px rgba(255,0,255,.3);
}
.hero-collage{
  position:absolute;right:clamp(8px,5vw,70px);top:50%;transform:translateY(-50%);
  width:min(42vw,420px);aspect-ratio:3/4;z-index:2;
}
.shot{
  position:absolute;margin:0;overflow:hidden;border-radius:var(--rad);
  background:#1d1018;box-shadow:0 26px 60px rgba(0,0,0,.62),0 0 0 1px rgba(255,0,255,.42);
}
.shot:empty{display:none}
.shot-a{inset:0 20% 28% 0;transform:rotate(-6deg)}
.shot-b{inset:30% 0 0 24%;transform:rotate(5deg)}
.shot img{display:block;width:100%;height:100%;object-fit:cover;filter:saturate(118%) contrast(105%)}

/* ---------- 主体骨架 ---------- */
.shell{
  display:grid;grid-template-columns:minmax(0,1fr) 236px;
  gap:clamp(20px,4vw,54px);align-items:start;
  max-width:1180px;margin:0 auto;
  padding:0 clamp(16px,4vw,46px) clamp(50px,8vw,90px);
}
.doc{min-width:0}
.intro{
  margin-top:clamp(18px,4vw,38px);
  padding:clamp(24px,4vw,42px) 0 clamp(16px,3vw,26px);
  border-top:1px solid var(--line);
}
.doc .intro h2{
  font-size:clamp(19px,2.6vw,25px);letter-spacing:.16em;color:#ffb8dc;margin-bottom:.4em;
}
.subtitle{margin:0;color:#e6cfe0;font-size:17px;max-width:62ch}

.doc > div[id]{
  padding:clamp(28px,4.6vw,46px) 0;
  border-top:1px solid rgba(255,0,255,.12);
  scroll-margin-top:132px;
}
.doc h2{font-size:clamp(23px,3.2vw,32px);color:#fff;letter-spacing:.01em}
.doc h2::after{
  content:"";display:block;width:56px;height:3px;margin-top:12px;border-radius:2px;
  background:linear-gradient(90deg,var(--pink),var(--magenta));
  box-shadow:0 0 14px rgba(255,0,255,.7);
}
.doc h3{font-size:20px;color:#ffb8dc;margin-top:1.6em}
.doc h4{font-size:17px;color:#ffe0f0;letter-spacing:.06em}
.doc strong{color:#fff}
.doc blockquote{
  margin:1.6em 0;padding:14px 18px;border-left:3px solid var(--magenta);
  border-radius:0 var(--rad) var(--rad) 0;background:rgba(255,0,128,.08);color:#f2dce9;
}
.doc blockquote p:last-child{margin-bottom:0}
.doc ul li,.doc ol li{margin-bottom:.4em}
.doc table{width:100%;border-collapse:collapse;font-size:16px;margin:0 0 1.4em}
.doc th,.doc td{padding:10px 12px;text-align:left;border-bottom:1px solid rgba(255,0,255,.16)}
.doc th{color:#ffb8dc;font-weight:600}
.doc hr{border:0;height:1px;margin:2em 0;background:linear-gradient(90deg,var(--pink),transparent)}
.doc figure{margin:1.6em 0}
.doc figcaption{font-size:16px;color:var(--dim);margin-top:.5em}
.doc code{font-family:"SFMono-Regular",Consolas,monospace;font-size:.94em;background:rgba(255,0,128,.14);padding:2px 6px;border-radius:3px}

/* ---------- 右侧栏 ---------- */
.rail{
  position:sticky;top:132px;
  padding-left:18px;border-left:1px solid rgba(255,0,128,.22);
}
.rail-title{
  margin:0 0 .7em;font-family:var(--fdisp);font-size:15px;letter-spacing:.24em;color:#ff93c9;
}
.rail ul{list-style:none;margin:0;padding:0;counter-reset:rail}
.rail li{counter-increment:rail}
.rail a{
  display:flex;align-items:center;gap:10px;min-height:40px;padding:6px 0;
  font-size:16px;line-height:1.35;color:#cbb4c4;text-decoration:none;
}
.rail a::before{
  content:counter(rail,decimal-leading-zero);
  font-family:var(--fdisp);font-size:12px;letter-spacing:.06em;color:var(--pink);opacity:.9;
}
.rail a:hover,.rail a:focus-visible{color:#fff}

/* ---------- 页脚 ---------- */
.site-foot{
  position:relative;overflow:hidden;margin-top:clamp(30px,6vw,60px);
  border-top:1px solid rgba(255,0,255,.28);
  background:linear-gradient(180deg,#180e15,#0e070c);
}
.site-foot::before{
  content:"";position:absolute;left:-10%;right:-10%;top:-60px;height:220px;pointer-events:none;
  background:
    radial-gradient(50% 100% at 30% 0%,rgba(255,0,128,.4),transparent 70%),
    radial-gradient(50% 100% at 76% 0%,rgba(255,0,255,.3),transparent 70%);
  filter:blur(30px);
}
.foot-grid{
  position:relative;display:grid;gap:26px;
  max-width:1180px;margin:0 auto;
  padding:clamp(36px,6vw,64px) clamp(18px,4vw,46px) 18px;
}
.foot-mark{
  display:block;font-style:normal;
  font-family:var(--fdisp);font-size:clamp(34px,8.6vw,84px);line-height:.98;letter-spacing:.01em;
  background:linear-gradient(96deg,#ff0080,#ff00ff 55%,#ff8fd0);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 0 24px rgba(255,0,255,.35));
}
.foot-links ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:2px 16px}
.foot-links a{
  display:flex;align-items:center;min-height:40px;padding:4px 0;
  font-size:16px;color:var(--dim);text-decoration:none;
}
.foot-links a:hover,.foot-links a:focus-visible{color:#fff}
.foot-copy{
  position:relative;max-width:1180px;margin:0 auto;
  padding:14px clamp(18px,4vw,46px) 26px;
  text-align:center;font-size:16px;color:#a8939f;
  border-top:1px solid rgba(255,0,255,.14);
}
.foot-copy .to-top{display:inline-flex;align-items:center;min-height:40px;padding:0 6px;color:#ff9ecf;text-decoration:none}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s cubic-bezier(.22,.7,.3,1),transform .7s cubic-bezier(.22,.7,.3,1)}
.reveal.is-in{opacity:1;transform:none}

@media (min-width:760px){
  .foot-grid{grid-template-columns:1.15fr 1fr;align-items:start}
}

@media (max-width:899px){
  .shell{grid-template-columns:minmax(0,1fr)}
  .rail{
    position:static;order:2;margin-top:10px;padding:18px 0 0;
    border-left:0;border-top:1px solid rgba(255,0,255,.16);
  }
  .rail ul{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
}

@media (max-width:719px){
  .hero{padding:clamp(88px,14vh,124px) 18px clamp(46px,10vh,78px)}
  .hero-inner{max-width:100%}
  .hero-ghost{font-size:30vw;right:-6vw;top:auto;bottom:5%}
  .hero-collage{width:62vw;right:-9vw;top:auto;bottom:16%;transform:none;opacity:.55;z-index:1}
  .hero h1{font-size:clamp(34px,10.5vw,54px)}
  .doc > div[id]{scroll-margin-top:118px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .hero-mesh{animation:none}
  .reveal{opacity:1;transform:none;transition:none}
}

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