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

:root{
  --violet:#56228b;
  --brown:#8b4513;
  --ink:#1f1726;
  --paper:#f5eee6;
  --surface:#fffdfa;
  --lilac:#ece0f6;
  --clay:#f1e3d6;
  --line:#e4d6c7;
  --muted:#6d6058;
  --r-lg:28px;
  --r-md:22px;
  --r-sm:16px;
  --shadow:0 22px 46px -32px rgba(31,23,38,.62);
  --soft:0 12px 26px -20px rgba(86,34,139,.55);
}

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

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

body{
  margin:0;
  overflow-x:hidden;
  background:var(--paper);
  background-image:
    radial-gradient(circle at 12% 6%,rgba(139,69,19,.09),transparent 42%),
    radial-gradient(circle at 88% 24%,rgba(86,34,139,.09),transparent 46%),
    radial-gradient(circle at 46% 98%,rgba(139,69,19,.07),transparent 40%);
  background-attachment:fixed;
  color:var(--ink);
  font-family:'Nunito Sans','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
  font-size:17px;
  line-height:1.75;
}

img{max-width:100%}

/* ---------- 顶部细条 ---------- */
.ticker{
  position:fixed;
  top:0;left:0;right:0;
  height:38px;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:14px;
  background:var(--ink);
  color:#f4eadf;
  font-size:16px;
  letter-spacing:.2em;
  z-index:70;
}
.ticker i{font-style:normal;color:#c08a5f}

/* ---------- 左侧竖排导航 ---------- */
.rail{
  position:fixed;
  top:38px;left:0;right:0;
  z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  padding:10px 14px 12px;
  box-shadow:var(--soft);
}
.rail>summary{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  cursor:pointer;
  list-style:none;
  font-family:'Varela Round',system-ui,sans-serif;
  color:var(--violet);
  letter-spacing:.12em;
}
.rail>summary::-webkit-details-marker{display:none}
.rail>summary::after{
  content:"";
  margin-left:auto;
  width:12px;height:12px;
  border-right:2px solid var(--brown);
  border-bottom:2px solid var(--brown);
  transform:rotate(45deg) translateY(-2px);
  transition:transform .25s ease;
}
.rail[open]>summary::after{transform:rotate(-135deg) translateY(-2px)}
.mark{
  display:grid;
  place-items:center;
  width:38px;height:38px;
  border-radius:14px 18px 16px 20px;
  background:linear-gradient(140deg,var(--violet),var(--brown));
  color:#fff;
  font-size:18px;
  overflow:hidden;
  flex:0 0 auto;
}
.mark img{width:100%;height:100%;object-fit:cover;display:block}
.mini{font-size:16px}

.rail menu{list-style:none;margin:8px 0 2px;padding:0;display:grid;gap:6px}
.rail menu a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:8px 14px;
  border-radius:var(--r-sm);
  background:var(--clay);
  color:var(--ink);
  font-size:16px;
  text-decoration:none;
}
.rail menu a:hover,.rail menu a:focus-visible{background:var(--lilac);color:var(--violet)}

/* ---------- 首屏 ---------- */
.hero{
  min-height:100vh;
  padding:124px 18px 40px;
  display:flex;
  flex-direction:column;
  gap:28px;
}
.hero-copy{max-width:580px}
.badge{
  display:inline-block;
  padding:6px 16px;
  border-radius:999px;
  background:var(--lilac);
  color:var(--violet);
  font-size:16px;
  letter-spacing:.08em;
}
h1{
  font-family:'Varela Round','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  font-size:clamp(33px,7.4vw,54px);
  line-height:1.22;
  letter-spacing:.01em;
  margin:16px 0 14px;
}
.lede{color:var(--muted);font-size:18px;margin:0 0 24px;max-width:46ch}
.cta{
  display:inline-flex;
  align-items:center;
  min-height:50px;
  padding:0 26px;
  border-radius:999px 22px 999px 22px;
  background:var(--violet);
  color:#fff;
  font-size:16px;
  letter-spacing:.06em;
  text-decoration:none;
  box-shadow:var(--soft);
}
.cta:hover{background:var(--brown)}

.collage{position:relative;min-height:320px;flex:1}
.frame{
  margin:0;
  position:absolute;
  overflow:hidden;
  background:var(--clay);
  box-shadow:var(--shadow);
}
.frame img{width:100%;height:100%;object-fit:cover;display:block}
.frame.a{inset:0 16% 28% 0;border-radius:120px 28px 96px 34px}
.frame.b{width:58%;height:56%;right:0;bottom:0;border-radius:34px 104px 30px 112px;border:6px solid var(--surface)}

/* ---------- 正文 ---------- */
.page{padding:0 18px 56px;display:grid;gap:26px}
.paper{max-width:790px;min-width:0}

.paper article{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:26px 20px;
  margin-bottom:22px;
  box-shadow:var(--shadow);
  scroll-margin-top:132px;
}
.paper article:nth-child(even){border-radius:var(--r-md) var(--r-lg) var(--r-md) var(--r-lg)}

.paper h2,.paper h3{
  font-family:'Varela Round','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  line-height:1.35;
  margin:0 0 8px;
}
.paper h2{font-size:clamp(21px,3.6vw,27px);color:var(--violet)}
.paper h3{font-size:19px;color:var(--brown)}

.paper h2+hr,.paper h3+hr{
  border:0;
  height:4px;
  width:66px;
  margin:10px 0 18px;
  border-radius:4px;
  background:linear-gradient(90deg,var(--violet),var(--brown));
}
.paper hr{border:0;height:1px;background:var(--line);margin:22px 0}

.paper p{margin:0 0 16px}
.paper p:last-child{margin-bottom:0}
.paper ul,.paper ol{margin:0 0 16px;padding-left:22px}
.paper li{margin-bottom:8px}
.paper a{
  color:var(--violet);
  text-decoration:underline;
  text-decoration-color:rgba(86,34,139,.38);
  text-underline-offset:3px;
}
.paper a:hover{color:var(--brown)}
.paper strong{color:var(--violet)}
.paper blockquote{
  margin:18px 0;
  padding:14px 18px;
  background:var(--clay);
  border-left:5px solid var(--brown);
  border-radius:6px 18px 18px 6px;
  color:#4b3b33;
}

/* ---------- 侧栏 ---------- */
.side{
  background:var(--lilac);
  border:1px solid #ddcdea;
  border-radius:var(--r-md);
  padding:20px 16px;
  min-width:0;
}
.side h2{
  font-family:'Varela Round','PingFang SC',system-ui,sans-serif;
  font-size:19px;
  margin:0;
  color:var(--violet);
}
.side hr{border:0;height:3px;width:48px;margin:10px 0 16px;border-radius:3px;background:var(--brown)}
.side ol{list-style:none;margin:0;padding:0;display:grid;gap:8px;counter-reset:s}
.side li{counter-increment:s}
.side a{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:42px;
  padding:6px 12px;
  border-radius:14px;
  background:rgba(255,255,255,.62);
  color:var(--ink);
  font-size:16px;
  text-decoration:none;
}
.side a::before{
  content:counter(s,decimal-leading-zero);
  font-size:14px;
  letter-spacing:.1em;
  color:var(--brown);
}
.side a:hover{background:#fff;color:var(--violet)}

/* ---------- 页脚 ---------- */
footer{
  background:var(--ink);
  color:#efe6dc;
  padding:48px 18px 22px;
  display:grid;
  gap:28px;
}
footer article{min-width:0}
.wordmark{
  font-family:'Varela Round','PingFang SC',system-ui,sans-serif;
  font-size:clamp(36px,7.2vw,64px);
  line-height:1.06;
  color:#f8efe6;
  text-decoration:none;
  display:inline-block;
}
.wordmark:hover{color:#d9bff5}
footer ul{list-style:none;margin:0;padding:0;display:grid;gap:2px}
footer a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  color:#efe6dc;
  font-size:16px;
  text-decoration:none;
  opacity:.88;
}
footer a:hover{opacity:1;color:#d9bff5}
.f-kw p{
  margin:0;
  font-size:19px;
  letter-spacing:.16em;
  color:#cbb6de;
}
.foot-bottom{
  grid-column:1/-1;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  border-top:1px solid rgba(255,255,255,.14);
  padding-top:14px;
  font-size:16px;
  color:#c6b7ce;
}
.fb-links{display:flex;flex-wrap:wrap;gap:0 22px}

/* ---------- 动效 ---------- */
.has-motion .reveal{
  opacity:0;
  transform:translateY(22px);
  transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.3,1);
}
.has-motion .reveal.in{opacity:1;transform:none}

/* ---------- 断点 ---------- */
@media (min-width:960px){
  .rail{
    right:auto;
    bottom:0;
    width:212px;
    padding:18px 14px;
    border-right:1px solid var(--line);
    border-bottom:0;
    box-shadow:none;
    overflow-y:auto;
  }
  .rail menu a{background:transparent}
  .rail menu a:hover,.rail menu a:focus-visible{background:var(--lilac)}
  .hero,.page,footer{margin-left:212px}
  .hero{
    flex-direction:row;
    align-items:center;
    gap:38px;
    padding:64px 40px 48px;
  }
  .page{padding:0 40px 64px}
  .paper article{padding:34px 34px;scroll-margin-top:72px}
  footer{grid-template-columns:1.7fr 1fr 1fr 1fr;padding:64px 40px 26px;gap:24px}
}

@media (min-width:1080px){
  .page{grid-template-columns:minmax(0,1fr) 268px;align-items:start;gap:32px}
  .side{position:sticky;top:64px}
}

@media (max-width:420px){
  .frame.a{inset:0 8% 30% 0}
  .frame.b{width:62%;height:54%}
  .lede{font-size:17px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .has-motion .reveal{opacity:1;transform:none;transition:none}
  .rail>summary::after{transition:none}
}

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