@import url('https://fonts.googleapis.com/css2?family=Lexend+Mega:wght@100..900&family=Public+Sans:wght@100..900&display=swap');

:root{
  --ink:#1f1726;
  --ink-2:#281e30;
  --pur:#56228b;
  --och:#8b4513;
  --tx:#f2ecf6;
  --dim:#c4b4ce;
  --line:rgba(242,236,246,.16);
  --line-2:rgba(242,236,246,.3);
  --r:10px;
  --pad:20px;
}

*{box-sizing:border-box}

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

body{
  margin:0;
  background:var(--ink);
  color:var(--tx);
  font-family:'Public Sans',system-ui,-apple-system,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  font-size:17px;
  line-height:1.75;
  overflow-x:hidden;
  padding-bottom:calc(86px + env(safe-area-inset-bottom));
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(46vw 38vw at 88% 6%,rgba(86,34,139,.42),transparent 68%),
    radial-gradient(52vw 40vw at 4% 32%,rgba(139,69,19,.28),transparent 70%),
    radial-gradient(60vw 44vw at 70% 88%,rgba(86,34,139,.28),transparent 72%);
}

body::after{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  opacity:.5;
  background-image:
    repeating-linear-gradient(115deg,rgba(255,255,255,.022) 0 2px,transparent 2px 5px),
    repeating-linear-gradient(28deg,rgba(0,0,0,.04) 0 3px,transparent 3px 9px);
}

h1,h2,h3,.rail-t,.badge,.foot-brand{
  font-family:'Lexend Mega','Public Sans',system-ui,'PingFang SC','Microsoft YaHei',sans-serif;
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.012em;
}

p{margin:0 0 1em}

a{color:#cb9ff0}
a:hover{color:#e6cdff}

::selection{background:var(--och);color:#fff}

:focus-visible{outline:2px solid #d59a55;outline-offset:3px;border-radius:6px}

.skip{
  position:absolute;
  top:-70px;
  left:14px;
  z-index:90;
  background:var(--och);
  color:#fff;
  text-decoration:none;
  padding:10px 16px;
  border-radius:10px;
}
.skip:focus{top:12px;color:#fff}

/* 品牌角标 */
.badge{
  position:fixed;
  top:14px;
  left:16px;
  z-index:70;
  width:46px;
  height:46px;
  display:grid;
  place-items:center;
  text-decoration:none;
  color:#fff;
  font-size:19px;
  background:var(--pur);
  border:1.5px solid var(--line-2);
  border-radius:18px 24px 15px 22px;
}
.badge img{width:30px;height:30px;object-fit:contain;border-radius:8px}
.badge:hover{color:#fff;background:#6729a6}

/* 主区域 */
main{position:relative;z-index:2}

.hero{
  position:relative;
  min-height:70vh;
  display:flex;
  align-items:flex-end;
  overflow:hidden;
  padding:96px var(--pad) 60px;
  border-radius:0 0 32% 32% / 0 0 78px 78px;
  background:linear-gradient(160deg,#3a1758,#1f1726 78%);
}

.hero--flat{
  background:
    radial-gradient(70vw 50vw at 20% 10%,rgba(139,69,19,.55),transparent 72%),
    linear-gradient(160deg,#4a1d6c,#1f1726 80%);
}

.hero-media{position:absolute;inset:0;z-index:0}
.hero-media img{width:100%;height:100%;object-fit:cover;display:block;filter:saturate(1.05) contrast(1.04)}
.hero-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(to top,rgba(31,23,38,.96) 12%,rgba(31,23,38,.62) 48%,rgba(31,23,38,.18) 100%);
}

.hero-in{position:relative;z-index:3;max-width:600px}

.hero h1{
  margin:0 0 .5em;
  font-size:clamp(1.95rem,8vw,3.5rem);
  text-shadow:0 2px 18px rgba(0,0,0,.35);
}

.hero-desc{
  margin:0 0 1.4em;
  color:var(--dim);
  font-size:1.02rem;
  max-width:44ch;
}

.hero-cta{
  display:inline-block;
  padding:12px 22px;
  min-height:46px;
  border:1.5px solid var(--line-2);
  border-radius:22px 12px 22px 12px;
  background:rgba(139,69,19,.42);
  color:#fff;
  text-decoration:none;
  font-weight:700;
}
.hero-cta:hover{background:rgba(139,69,19,.72);color:#fff;transform:translateY(-2px)}
.hero-cta{transition:background .2s,transform .2s}

.hero-band{
  position:absolute;
  left:0;right:0;bottom:0;
  height:9px;
  z-index:4;
  background:linear-gradient(90deg,var(--och),#b0642a,var(--pur),var(--och));
}

/* 布局 */
.wrap{
  max-width:1080px;
  margin:0 auto;
  padding:0 var(--pad);
  display:grid;
  grid-template-columns:minmax(0,1fr) 258px;
  gap:44px;
  align-items:start;
}

.doc{padding-top:46px;min-width:0}

/* 正文 */
.prose{font-size:17px}

.prose > article{
  border:1.5px solid var(--line);
  border-radius:var(--r);
  padding:26px 22px;
  margin:0 0 22px;
  background:rgba(255,255,255,.022);
  scroll-margin-top:82px;
  transition:border-color .22s,transform .22s;
}
.prose > article:nth-child(even){border-radius:20px 10px 20px 10px}
.prose > article:nth-child(3n){border-radius:10px 20px 10px 20px}
.prose > article:hover{border-color:var(--line-2);transform:translateY(-2px)}
.prose > article:first-child{margin-top:0}

.prose h2{
  font-size:clamp(1.32rem,4.4vw,1.85rem);
  margin:0 0 .55em;
  padding-bottom:.45em;
  position:relative;
  border-bottom:2px solid var(--line);
}
.prose h2::after{
  content:"";
  position:absolute;
  left:0;bottom:-2px;
  width:60px;height:2px;
  background:linear-gradient(90deg,var(--och),var(--pur));
}

.prose h3{
  font-size:1.1rem;
  margin:1.7em 0 .5em;
  color:#e8d9f4;
}

.prose h2 + p{
  font-size:1.02rem;
  color:#d5c2e2;
  margin-top:-.1em;
}

.prose p{color:#e8e0ee}

.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1.1em}
.prose li{margin:0 0 .5em}
.prose li::marker{color:#c98a4a}

.prose strong{color:#fff}

.prose blockquote{
  margin:1.4em 0;
  padding:14px 18px;
  border-left:3px solid var(--och);
  border-radius:0 14px 14px 0;
  background:rgba(139,69,19,.16);
  color:#f0e4d7;
}
.prose blockquote p:last-child{margin:0}

.prose img{
  max-width:100%;
  height:auto;
  border-radius:14px;
  border:1.5px solid var(--line);
  display:block;
  margin:1.3em 0;
}

.prose code,.prose pre{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:.92em;
}
.prose code{background:rgba(255,255,255,.09);padding:.1em .4em;border-radius:6px}
.prose pre{overflow-x:auto;padding:14px;border:1.5px solid var(--line);border-radius:12px}

.prose table{width:100%;border-collapse:collapse;font-size:.96em}
.prose th,.prose td{border-bottom:1px solid var(--line);padding:9px 6px;text-align:left}

/* 侧栏 */
.rail{
  position:sticky;
  top:86px;
  margin-top:46px;
  padding:20px 18px;
  border:1.5px solid var(--line);
  border-radius:22px 12px 22px 12px;
  background:rgba(86,34,139,.18);
}

.rail-t{margin:0 0 .2em;font-size:1.18rem}
.subtitle{margin:0 0 1em;color:var(--dim);font-size:.95rem}

.rail-list{
  list-style:none;
  margin:0 0 1em;
  padding:0;
  counter-reset:r;
}
.rail-list li{border-bottom:1px dashed rgba(242,236,246,.14)}
.rail-list li:last-child{border-bottom:0}
.rail-list a{
  display:block;
  padding:11px 2px;
  min-height:42px;
  color:#ded2e6;
  text-decoration:none;
  font-size:.98rem;
  counter-increment:r;
}
.rail-list a::before{
  content:counter(r,decimal-leading-zero);
  font-family:'Lexend Mega',sans-serif;
  font-size:.76rem;
  color:var(--och);
  margin-right:.7em;
}
.rail-list a:hover{color:#fff;padding-left:6px}

.rail-top{margin:0}
.rail-top a{
  display:inline-block;
  padding:10px 16px;
  min-height:42px;
  border:1.5px solid var(--line-2);
  border-radius:20px;
  color:var(--tx);
  text-decoration:none;
  font-size:.94rem;
}
.rail-top a:hover{background:rgba(139,69,19,.5);color:#fff}

/* 页脚 */
.foot{
  position:relative;
  z-index:2;
  max-width:1080px;
  margin:64px auto 0;
  padding:30px var(--pad) 30px;
  border-top:1.5px solid var(--line);
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  gap:16px 30px;
  align-items:start;
  font-size:.95rem;
}

.foot-brand{
  display:flex;
  align-items:center;
  gap:10px;
  margin:0;
  font-size:1rem;
}
.foot-brand img{width:26px;height:26px;border-radius:8px;object-fit:contain}
.foot-brand span:not([aria-hidden]){
  background:var(--pur);
  color:#fff;
  line-height:1;
  display:grid;
  place-items:center;
  width:26px;height:26px;
  border-radius:9px;
  font-size:.85rem;
}
.foot-brand span[aria-hidden]{display:none}

.foot-links{margin:0}
.foot-links a{
  display:inline-block;
  padding:9px 2px;
  min-height:40px;
  margin-right:16px;
  color:var(--dim);
  text-decoration:none;
}
.foot-links a:hover{color:#fff;text-decoration:underline}

.foot-copy{justify-self:end;color:#9d8da8;font-size:.88rem;padding:9px 0}

/* 底部导航 */
.tabbar{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:60;
  background:rgba(31,23,38,.95);
  border-top:1.5px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}

.tabbar ol{
  display:flex;
  gap:2px;
  margin:0;
  padding:7px 10px;
  list-style:none;
  overflow-x:auto;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.tabbar ol::-webkit-scrollbar{display:none}

.tabbar li{flex:0 0 auto}

.tabbar a{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:2px;
  min-height:52px;
  min-width:66px;
  padding:8px 10px;
  border:1.5px solid transparent;
  border-radius:14px 10px 14px 10px;
  color:#a992b8;
  text-decoration:none;
  font-size:.94rem;
  line-height:1.15;
  transition:color .2s,background .2s,border-color .2s;
}
.tabbar a:hover{color:#fff;background:rgba(86,34,139,.4)}
.tabbar a[aria-current="true"]{
  color:#fff;
  background:rgba(139,69,19,.46);
  border-color:var(--line-2);
}

.tabbar svg{
  width:18px;height:18px;
  fill:none;
  stroke:currentColor;
  stroke-width:1.7;
  stroke-linecap:round;
  stroke-linejoin:round;
}

/* 动效 */
.anim .reveal{opacity:0;transform:translateY(16px)}
.anim .reveal.in{
  opacity:1;
  transform:none;
  transition:opacity .62s ease,transform .62s cubic-bezier(.22,.82,.3,1);
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .anim .reveal{opacity:1;transform:none;transition:none}
  .prose > article,.hero-cta{transition:none}
}

/* 移动端 */
@media (max-width:900px){
  .wrap{grid-template-columns:1fr;gap:30px}
  .rail{position:static;margin:6px 0 0;order:2}
  .doc{padding-top:34px}
  .foot{grid-template-columns:1fr;gap:6px;margin-top:46px}
  .foot-copy{justify-self:start}
  .foot-links a{margin-right:14px}
}

@media (max-width:520px){
  body{font-size:16.5px}
  .hero{min-height:66vh;padding:86px 18px 48px;border-radius:0 0 40% 40% / 0 0 64px 64px}
  .hero-desc{font-size:.98rem}
  .hero-in{max-width:none}
  .prose > article{padding:22px 16px}
  .badge{width:44px;height:44px;top:12px;left:12px}
  .tabbar a{min-width:60px;padding:8px 7px;font-size:.9rem}
}

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