:root{
  --ink:#261717;
  --ink2:#1a0f0f;
  --block:#331f1f;
  --red:#ff0000;
  --pink:#ff1493;
  --cream:#ffeef1;
  --dim:#cfa9af;
  --bar:64px;
  --r:10px;
}
*,*::before,*::after{box-sizing:border-box}
html{
  scroll-behavior:smooth;-webkit-text-size-adjust:100%;
  max-width:100%;overflow-x:hidden;
}
body{
  margin:0;
  background:var(--ink);
  color:var(--cream);
  font-family:Inter,system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.78;
  max-width:100%;
  overflow-x:hidden;
  overflow-wrap:break-word;
  word-break:break-word;
}
h1,h2,h3{font-family:"Space Grotesk",Inter,system-ui,sans-serif;line-height:1.2;margin:0;letter-spacing:-.01em}
p{margin:0 0 1em}
a{color:inherit}
img{max-width:100%}
:focus-visible{outline:2px solid var(--pink);outline-offset:3px;border-radius:4px}

/* ---------- 顶部细条 + 顶栏 ---------- */
.topbar{position:sticky;top:0;z-index:60;background:rgba(26,15,15,.92);backdrop-filter:blur(16px) saturate(1.2);max-width:100%}
.thin{
  margin:0;padding:7px 16px;text-align:center;
  font-family:"JetBrains Mono",monospace;font-size:12px;letter-spacing:.3em;
  color:#ffc2d6;
  background:linear-gradient(90deg,rgba(255,0,0,.22),rgba(255,20,147,.42),rgba(255,0,0,.22));
}
.bar{display:flex;align-items:center;gap:10px;height:var(--bar);padding:0 16px;max-width:100%;min-width:0}
.brand{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;flex:0 0 auto;border-radius:var(--r);
  background:linear-gradient(135deg,var(--red),var(--pink));
  color:#fff;text-decoration:none;
  font-family:"Space Grotesk",sans-serif;font-weight:700;font-size:19px;
  box-shadow:0 8px 24px -10px rgba(255,20,147,.9);
}
.brand .logo{width:26px;height:26px;display:block}

.menubtn{
  display:none;margin-left:auto;
  align-items:center;min-height:44px;padding:0 18px;
  font:inherit;font-size:16px;color:var(--cream);
  background:rgba(255,20,147,.16);border:0;border-radius:var(--r);cursor:pointer;
}
.nav{margin-left:auto;min-width:0}
.nav ul{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0}
.nav a{
  display:flex;align-items:center;min-height:44px;padding:0 13px;
  border-radius:var(--r);text-decoration:none;font-size:16px;color:var(--cream);
  transition:background .2s ease,color .2s ease;
}
.nav a:hover,.nav a:focus-visible{background:rgba(255,20,147,.24);color:#fff}
.group{position:relative}
.group-btn{
  display:flex;align-items:center;gap:7px;
  min-height:44px;padding:0 15px;font:inherit;font-size:16px;
  color:var(--cream);background:rgba(255,20,147,.14);border:0;border-radius:var(--r);cursor:pointer;
}
.group-btn::after{
  content:"";width:6px;height:6px;
  border-right:2px solid currentColor;border-bottom:2px solid currentColor;
  transform:rotate(45deg) translateY(-2px);
}
.nav ul.drop{
  position:absolute;right:0;top:calc(100% + 8px);
  display:flex;flex-direction:column;gap:2px;
  min-width:196px;padding:8px;margin:0;
  background:#2f1c1c;border-radius:var(--r);
  box-shadow:0 24px 54px -14px rgba(0,0,0,.75);
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s;
}
.nav ul.drop a{width:100%;padding:0 12px}
.group:hover .drop,.group:focus-within .drop,.group.open .drop{opacity:1;visibility:visible;transform:none}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;isolation:isolate;overflow:hidden;
  min-height:100vh;display:grid;place-items:center;
  padding:100px 20px 84px;text-align:center;max-width:100%;
}
.aurora{
  position:absolute;inset:-22% -12%;z-index:-2;
  background:
    radial-gradient(42% 52% at 18% 28%,rgba(255,0,0,.85),rgba(255,0,0,0) 66%),
    radial-gradient(40% 48% at 80% 20%,rgba(255,20,147,.85),rgba(255,20,147,0) 62%),
    radial-gradient(56% 62% at 60% 84%,rgba(126,16,48,.9),rgba(126,16,48,0) 70%),
    radial-gradient(34% 44% at 10% 84%,rgba(255,77,109,.7),rgba(255,77,109,0) 68%);
  background-size:180% 180%;
  filter:saturate(1.25) blur(26px);
  mix-blend-mode:screen;
  animation:drift 11s ease-in-out infinite alternate;
}
@keyframes drift{
  0%{background-position:0% 0%}
  100%{background-position:100% 100%}
}
.hero::after{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(62% 62% at 50% 46%,rgba(26,15,15,.6),rgba(26,15,15,.06) 72%);
}
.hero-imgs{position:absolute;inset:0;z-index:-1;pointer-events:none;overflow:hidden}
.hero-imgs figure{
  margin:0;position:absolute;overflow:hidden;border-radius:14px;
  box-shadow:0 30px 70px -22px rgba(0,0,0,.85);
  opacity:.62;
}
.hero-imgs figure:nth-child(1){width:clamp(118px,17vw,236px);left:5%;top:20%;transform:rotate(-7deg)}
.hero-imgs figure:nth-child(2){width:clamp(140px,22vw,300px);right:4%;bottom:11%;transform:rotate(6deg)}
.hero-img{display:block;width:100%;height:auto}
.hero-txt{position:relative;max-width:780px;min-width:0}
.hero h1{font-size:clamp(2rem,6.1vw,4.3rem);font-weight:700}
.hero .lead{margin:20px auto 0;max-width:52ch;color:#ffd6e0;font-size:clamp(1rem,1.9vw,1.12rem)}

/* ---------- 内容骨架 ---------- */
.shell{
  display:grid;grid-template-columns:232px minmax(0,1fr);gap:44px;
  max-width:1180px;margin:0 auto;padding:0 20px 84px;
  min-width:0;max-width:100%;
}
.side{position:sticky;top:calc(var(--bar) + 16px);align-self:start;padding-top:54px;min-width:0;max-width:100%}
.side ul{list-style:none;margin:10px 0 0;padding:0;display:grid;gap:2px;max-width:100%}
.side a{
  display:flex;align-items:center;min-height:42px;padding:4px 12px;
  border-radius:8px;text-decoration:none;font-size:16px;line-height:1.4;color:var(--dim);
}
.side a:hover,.side a:focus-visible{color:#fff;background:#3a2525}
.side-h{font-size:18px;font-weight:600;color:#fff}

small{
  display:block;
  font-family:"JetBrains Mono",monospace;font-size:12px;letter-spacing:.24em;
  color:var(--pink);margin-bottom:8px;
}

main{min-width:0;max-width:100%}
.doc{padding-top:52px;min-width:0;max-width:100%}
.doc > section{
  padding:54px 0;
  border-top:1px solid rgba(255,20,147,.16);
  scroll-margin-top:calc(var(--bar) + 30px);
  min-width:0;max-width:100%;
}
.doc > section:first-child{border-top:0;padding-top:6px}
.doc h2{font-size:clamp(1.5rem,3.4vw,2.1rem);font-weight:600;color:#fff;margin:0 0 18px;overflow-wrap:break-word}
.doc h3{font-size:clamp(1.18rem,2.3vw,1.4rem);font-weight:600;color:#ffd9e4;margin:30px 0 12px}
.doc p,.doc li{color:#f2dcdf}
.doc p{max-width:72ch}
.doc ul,.doc ol{padding-left:1.25em;margin:0 0 1em}
.doc li{margin:.35em 0}
.doc a{color:#ffadc8;text-underline-offset:3px;overflow-wrap:break-word}
.doc img{display:block;margin:20px 0;border-radius:var(--r);height:auto;max-width:100%}
.doc blockquote{
  margin:24px 0;padding:18px 20px;border-radius:var(--r);
  background:var(--block);color:#ffe4ec;
}
.doc blockquote p:last-child{margin-bottom:0}
.doc section > :last-child{margin-bottom:0}
.doc figure{margin:22px 0;max-width:100%}
.doc figure img{margin:0}
.doc figcaption{font-size:15px;color:var(--dim);margin-top:8px}
.doc pre{
  margin:20px 0;padding:16px;border-radius:var(--r);
  background:#1d1111;overflow-x:auto;max-width:100%;
  font-family:"JetBrains Mono",monospace;font-size:14px;line-height:1.6;
}
.doc code{font-family:"JetBrains Mono",monospace;font-size:.94em;overflow-wrap:break-word}
.doc table{width:100%;max-width:100%;border-collapse:collapse;margin:20px 0;font-size:16px}
.doc th,.doc td{padding:10px 12px;text-align:left;border-bottom:1px solid rgba(255,20,147,.18);overflow-wrap:break-word}
.doc th{background:var(--block);color:#fff}

.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .8s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- 页脚 ---------- */
.foot{background:var(--ink2);padding:0 20px 40px;margin-top:26px;max-width:100%;overflow-x:hidden}
.cta{
  max-width:1180px;margin:-58px auto 44px;padding:42px 30px;
  border-radius:var(--r);
  background:linear-gradient(115deg,var(--red),var(--pink) 56%,#8c0f52);
  display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:space-between;
  box-shadow:0 36px 80px -34px rgba(255,20,147,.85);
}
.cta small{color:#ffd9e4}
.cta h2{font-size:clamp(1.5rem,4vw,2.2rem);color:#fff;font-weight:700}
.cta-btn{
  display:inline-flex;align-items:center;min-height:50px;padding:0 26px;
  border-radius:var(--r);background:var(--ink);color:#fff;text-decoration:none;
  font-family:"Space Grotesk",sans-serif;font-weight:600;font-size:17px;
}
.cta-btn:hover{background:#000}
.foot-cols{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:32px;min-width:0}
.foot-col{min-width:0}
address{font-style:normal;font-family:"Space Grotesk",sans-serif;font-size:20px;font-weight:600;color:#fff;overflow-wrap:break-word}
.foot ul{list-style:none;margin:0;padding:0}
.foot ul a{display:inline-flex;align-items:center;min-height:42px;font-size:16px;color:var(--dim);text-decoration:none}
.foot ul a:hover,.foot ul a:focus-visible{color:#fff}
.foot-bottom{
  max-width:1180px;margin:38px auto 0;padding-top:18px;
  border-top:1px solid rgba(255,20,147,.2);
  display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;align-items:center;
  color:#a98b90;font-size:16px;
}
.foot-bottom p{margin:0}
.foot-bottom ul{display:flex;flex-wrap:wrap;gap:20px}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .shell{grid-template-columns:minmax(0,1fr);gap:0;padding-bottom:56px}
  .side{position:static;padding-top:30px;min-width:0;max-width:100%}
  .side ul{
    display:flex;flex-wrap:wrap;gap:8px;margin-top:8px;padding-bottom:6px;
    max-width:100%;
  }
  .side a{
    white-space:nowrap;background:var(--block);
    border-radius:999px;padding:0 15px;min-height:40px;color:#f0d3d8;
  }
  .doc{padding-top:26px}
  .doc > section{padding:44px 0;scroll-margin-top:calc(var(--bar) + 40px)}
  .foot-cols{grid-template-columns:1fr 1fr}
  .cta{margin-top:-44px;padding:36px 24px}
}
@media (max-width:860px){
  .menubtn{display:inline-flex}
  .nav{
    display:none;position:absolute;left:0;right:0;top:100%;
    margin:0;padding:10px 14px 16px;
    background:#2b1a1a;box-shadow:0 26px 46px -12px rgba(0,0,0,.85);
    border-top:1px solid rgba(255,20,147,.2);
  }
  .topbar.open .nav{display:block}
  .nav ul{flex-direction:column;align-items:stretch;gap:2px}
  .nav a{padding:0 12px}
  .group-btn{display:none}
  .nav ul.drop{
    position:static;opacity:1;visibility:visible;transform:none;
    padding:0 0 0 12px;margin:0;min-width:0;
    background:transparent;box-shadow:none;
  }
}
@media (max-width:640px){
  body{font-size:16px}
  .hero{padding:88px 18px 70px}
  .hero-imgs figure{opacity:.34}
  .hero-imgs figure:nth-child(1){left:-4%;top:16%}
  .hero-imgs figure:nth-child(2){right:-4%;bottom:9%}
  .doc table{display:block;overflow-x:auto;white-space:normal}
  .doc th,.doc td{white-space:nowrap}
  .foot-cols{grid-template-columns:1fr}
  .foot-bottom{flex-direction:column;align-items:flex-start}
  .cta{padding:30px 20px}
  .cta-btn{width:100%;justify-content:center}
}
@media (max-width:400px){
  .thin{letter-spacing:.16em;font-size:11px}
  .side a{font-size:15px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .aurora{animation:none}
  .reveal{opacity:1;transform:none;transition:none}
}

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