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

:root{
  --plum:#56228b;
  --brown:#8b4513;
  --ink:#1f1726;
  --cream:#faf6ef;
  --sand:#f0e5d6;
  --line:rgba(31,23,38,.13);
  --soft:rgba(86,34,139,.08);
  --max:1120px;
  --font:"Nunito",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:82px;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.75;
  color:var(--ink);
  background-color:var(--cream);
  background-image:radial-gradient(rgba(139,69,19,.08) 1px,transparent 1px);
  background-size:24px 24px;
}
img{display:block;max-width:100%;height:auto}
a{color:var(--plum);text-decoration:none}
h1,h2,h3,h4{font-family:"Fredoka",var(--font);margin:0;line-height:1.25;letter-spacing:.005em}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.25em}

/* ---------- 顶部 ---------- */
.topbar{border-bottom:1px solid var(--line);background:var(--cream)}
.topbar-in{
  max-width:var(--max);margin:0 auto;padding:12px 18px;
  display:flex;align-items:center;gap:10px;
}
.top-menu{display:flex;flex-wrap:wrap;gap:6px;flex:1 1 0;min-width:0}
.top-menu.right{justify-content:flex-end}
.brand{
  flex:0 0 auto;
  display:inline-flex;align-items:center;min-height:44px;padding:0 14px;
  font-family:"Fredoka",var(--font);
  font-weight:700;font-size:20px;letter-spacing:.03em;color:var(--ink);
  border-radius:999px 999px 999px 4px;
  background:var(--soft);
  white-space:nowrap;
}
.brand:hover{color:var(--plum);background:var(--sand)}

.pill{
  display:inline-flex;align-items:center;min-height:42px;padding:0 14px;
  border:1px solid var(--line);border-radius:999px;
  font-size:16px;font-weight:600;color:var(--ink);background:transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.pill:hover{background:var(--soft);border-color:var(--plum);color:var(--plum);transform:translateY(-2px)}
.pill-solid{background:var(--plum);border-color:var(--plum);color:#fff}
.pill-solid:hover{background:var(--brown);border-color:var(--brown);color:#fff}

/* ---------- 粘性锚点条 ---------- */
.anchors{
  position:sticky;top:0;z-index:30;
  background:rgba(250,246,239,.95);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(6px);
}
.anchors-in{
  max-width:var(--max);margin:0 auto;padding:8px 18px;
  display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;
}
.anchors-in::-webkit-scrollbar{display:none}
.anchors-in a{
  display:inline-flex;align-items:center;min-height:40px;padding:0 13px;
  border-radius:999px;border:1px solid transparent;
  font-size:16px;font-weight:600;color:var(--ink);white-space:nowrap;
  transition:background .2s ease,color .2s ease;
}
.anchors-in a:hover{background:var(--soft);color:var(--plum)}

/* ---------- 首屏 ---------- */
.hero{max-width:var(--max);margin:0 auto;padding:26px 18px 40px}
.hero-grid{display:grid;grid-template-columns:1fr;gap:24px}
.hero-copy h1{
  font-size:clamp(28px,6vw,52px);
  font-weight:700;
  color:var(--ink);
  letter-spacing:-.01em;
}
.hero-copy h1::after{
  content:"";display:block;width:88px;height:10px;margin-top:14px;
  background:var(--plum);border-radius:12px 12px 12px 2px;
}
.lede{margin:18px 0 22px;color:#443a4d;max-width:42ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:10px}

.hero-media{
  position:relative;display:grid;grid-template-columns:1fr 1fr;gap:12px;
  align-items:start;
}
.shot{
  margin:0;overflow:hidden;
  background:linear-gradient(150deg,var(--sand) 0%,#e6d6c2 55%,var(--soft) 100%);
  aspect-ratio:3/4;
}
.shot.s1{border-radius:110px 12px 110px 12px;transform:translateY(-8px) rotate(-2deg)}
.shot.s2{border-radius:12px 110px 12px 110px;transform:translateY(16px) rotate(2deg);
  background:linear-gradient(150deg,var(--soft) 0%,#e3d3ef 55%,var(--sand) 100%)}
.shot-img{width:100%;height:100%;object-fit:cover}

/* ---------- 正文骨架 ---------- */
.wrap{max-width:var(--max);margin:0 auto;padding:0 18px 64px}
.content-grid{display:grid;grid-template-columns:1fr;gap:34px}
.prose{min-width:0}
.prose section{padding:28px 0;border-top:1px solid var(--line);scroll-margin-top:82px}
.prose section:first-child{border-top:0;padding-top:0}
.prose h2{
  font-size:clamp(22px,3.4vw,30px);
  margin:0 0 12px;
  display:flex;gap:10px;align-items:baseline;
}
.prose h2::before{
  content:"";flex:0 0 auto;width:13px;height:13px;
  border-radius:50% 2px 50% 50%;
  background:var(--plum);
  transform:translateY(-2px);
}
.prose h3{font-size:19px;color:var(--brown);margin:22px 0 10px}
.prose h2+h3{margin-top:6px}
.prose p,.prose li{color:#2b2333}
.prose a{color:var(--plum);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.prose a:hover{color:var(--brown)}
.prose ul,.prose ol{padding-left:1.3em}
.prose li{margin:.35em 0}
.prose strong{color:var(--ink)}
.prose blockquote{
  margin:20px 0;padding:14px 18px;
  background:#fff;border-left:4px solid var(--brown);
  border-radius:0 4px 4px 0;color:#3a3040;
}
.prose blockquote p:last-child{margin-bottom:0}
.prose figure{margin:20px 0}
.prose figcaption{font-size:16px;color:#5b5164;margin-top:6px}
.prose img{border-radius:16px 16px 16px 4px}
.prose hr{border:0;border-top:1px solid var(--line);margin:26px 0}
.prose table{display:block;width:100%;overflow-x:auto;border-collapse:collapse;margin:18px 0}
.prose th,.prose td{border-bottom:1px solid var(--line);padding:9px 12px;text-align:left}
.prose th{background:var(--soft);font-weight:700}
.prose pre{
  overflow-x:auto;background:#241a2f;color:#f4edf9;
  padding:16px;border-radius:12px;font-size:16px;line-height:1.6;
}
.prose code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.95em}
.prose p code,.prose li code{background:var(--sand);padding:1px 5px;border-radius:4px;color:var(--brown)}

/* ---------- 侧栏 ---------- */
.rail{display:grid;gap:20px;align-content:start}
.rail-card{
  background:#fff;border:1px solid var(--line);
  border-bottom:3px solid var(--plum);
  border-radius:0;padding:16px 18px;
}
.rail-h{
  font-size:16px;letter-spacing:.06em;color:var(--brown);
  border-bottom:2px solid var(--plum);
  padding-bottom:7px;margin:0 0 12px;
}
.rail-h span{display:inline-block}
.rail-nav{list-style:none;margin:0;padding:0;display:grid;gap:0}
.rail-nav a{
  display:flex;align-items:center;gap:10px;min-height:42px;
  padding:4px 0;border-bottom:1px solid var(--line);
  font-size:16px;color:var(--ink);
  transition:color .2s ease,padding-left .2s ease;
}
.rail-nav li:last-child a{border-bottom:0}
.rail-nav a:hover{color:var(--plum);padding-left:5px}
.rail-nav em{font-style:normal;font-size:14px;letter-spacing:.1em;color:var(--brown);min-width:22px}
.rail-brand{
  margin:0;font-family:"Fredoka",var(--font);
  font-size:19px;font-weight:600;color:var(--plum);line-height:1.4;
}

/* ---------- 页脚 ---------- */
.foot{border-top:2px solid var(--ink);background:var(--sand)}
.foot-in{
  max-width:var(--max);margin:0 auto;padding:22px 18px;
  display:flex;flex-wrap:wrap;align-items:center;gap:14px 26px;
  justify-content:space-between;
}
.foot-brand{
  display:inline-flex;align-items:center;min-height:44px;
  font-family:"Fredoka",var(--font);font-weight:700;
  font-size:clamp(22px,4.2vw,34px);line-height:1.2;color:var(--ink);
}
.foot-brand:hover{color:var(--plum)}
.foot nav{min-width:0;flex:1 1 260px}
.foot dl{display:flex;flex-wrap:wrap;gap:2px 16px;margin:0}
.foot dt{font-size:14px;letter-spacing:.1em;color:var(--brown);align-self:center}
.foot dd{margin:0}
.foot dd a{
  display:inline-flex;align-items:center;min-height:40px;
  font-size:16px;color:var(--ink);
}
.foot dd a:hover{color:var(--plum);text-decoration:underline;text-underline-offset:3px}
.copy{margin:0;font-size:16px;color:#4b4054}

/* ---------- 回到顶部 ---------- */
.totop{
  position:fixed;right:16px;bottom:16px;z-index:40;
  min-height:44px;padding:0 16px;
  border:1px solid var(--plum);border-radius:999px;
  background:#fff;color:var(--plum);
  font-family:var(--font);font-size:16px;font-weight:600;
  cursor:pointer;opacity:0;pointer-events:none;transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,background .2s ease,color .2s ease;
}
.totop.on{opacity:1;pointer-events:auto;transform:none}
.totop:hover{background:var(--plum);color:#fff}

/* ---------- 滚动显现 ---------- */
.rv{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.rv.in{opacity:1;transform:none}

/* ---------- 断点 ---------- */
@media (min-width:900px){
  .hero{min-height:70vh;display:flex;align-items:center;padding:36px 18px 56px}
  .hero-grid{grid-template-columns:1.02fr .98fr;gap:52px;align-items:center}
  .hero-copy{order:2;text-align:right}
  .hero-copy h1::after{margin-left:auto}
  .lede{margin-left:auto}
  .hero-cta{justify-content:flex-end}
  .hero-media{order:1}
  .content-grid{grid-template-columns:minmax(0,1fr) 280px;gap:52px;align-items:start}
  .rail{position:sticky;top:84px}
}

@media (max-width:820px){
  .top-menu{display:none}
  .topbar-in{justify-content:center}
  .brand{font-size:19px}
  .foot-in{flex-direction:column;align-items:flex-start;gap:10px}
  .foot nav{flex:1 1 auto;width:100%}
}

@media (max-width:420px){
  body{font-size:16px}
  .anchors-in{padding:8px 12px}
  .wrap{padding:0 14px 52px}
  .hero{padding:20px 14px 32px}
  .shot.s1,.shot.s2{transform:none}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .rv{opacity:1;transform:none;transition:none}
  .pill:hover{transform:none}
}

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