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

:root{
  --violet:#56228b;
  --violet-soft:#7b3ea8;
  --ochre:#8b4513;
  --ink:#1f1726;
  --sand:#f6f0ea;
  --glass:rgba(255,255,255,.56);
  --glass-line:rgba(255,255,255,.74);
  --line:rgba(31,23,38,.14);
  --muted:rgba(31,23,38,.68);
  --shadow-s:0 12px 30px -22px rgba(31,23,38,.55);
  --shadow-m:0 26px 60px -36px rgba(31,23,38,.6);
  --max:1120px;
}

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

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

body{
  margin:0;
  font-family:Inter,-apple-system,BlinkMacSystemFont,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  font-size:17px;
  line-height:1.72;
  color:var(--ink);
  background:
    radial-gradient(58vw 48vw at 10% 2%,rgba(86,34,139,.16),transparent 66%),
    radial-gradient(52vw 44vw at 92% 26%,rgba(139,69,19,.15),transparent 68%),
    radial-gradient(50vw 42vw at 46% 98%,rgba(86,34,139,.11),transparent 72%),
    var(--sand);
  background-attachment:fixed;
  overflow-x:hidden;
}

a{color:var(--violet)}
a:hover{color:var(--ochre)}
a:focus-visible,
button:focus-visible{outline:2px solid var(--violet);outline-offset:3px;border-radius:14px}

img{max-width:100%}

/* ---------- hero ---------- */
.hero{
  position:relative;
  min-height:45vh;
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  text-align:center;
  padding:clamp(26px,6vw,54px) 20px 0;
  overflow:hidden;
  isolation:isolate;
}
.hero::before,
.hero::after{
  content:'';
  position:absolute;
  z-index:-1;
  border-radius:58% 42% 46% 54% / 52% 48% 52% 48%;
  pointer-events:none;
}
.hero::before{
  width:min(46vw,320px);
  aspect-ratio:1;
  left:-9%;
  top:4%;
  background:radial-gradient(circle at 32% 30%,rgba(86,34,139,.3),rgba(86,34,139,.05) 72%);
}
.hero::after{
  width:min(38vw,264px);
  aspect-ratio:1;
  right:-7%;
  top:24%;
  background:radial-gradient(circle at 58% 42%,rgba(139,69,19,.26),transparent 72%);
}
.hero-copy{
  max-width:820px;
  position:relative;
  z-index:1;
}
.hero h1{
  margin:0;
  font-size:clamp(28px,6.2vw,52px);
  line-height:1.24;
  font-weight:600;
  letter-spacing:-.012em;
  color:var(--ink);
  text-wrap:balance;
}
.hero-figure{
  position:relative;
  z-index:1;
  width:min(100%,700px);
  margin:clamp(18px,3vw,30px) auto 0;
}
.hero-figure img{
  display:block;
  width:100%;
  height:auto;
  object-fit:cover;
  border-radius:46% 54% 50% 50% / 20% 24% 32% 26%;
  box-shadow:var(--shadow-m);
  -webkit-mask-image:linear-gradient(180deg,#000 64%,rgba(0,0,0,.22));
  mask-image:linear-gradient(180deg,#000 64%,rgba(0,0,0,.22));
}
.hero-band{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:10px;
  background:linear-gradient(90deg,var(--violet),var(--ochre) 72%,var(--violet));
  clip-path:polygon(0 62%,100% 0,100% 100%,0 100%);
}

/* ---------- main grid ---------- */
main{
  padding:clamp(24px,4vw,42px) 20px clamp(22px,3.4vw,34px);
}
.wrap{
  max-width:var(--max);
  margin:0 auto;
  display:grid;
  grid-template-columns:190px minmax(0,1fr);
  gap:clamp(20px,3vw,40px);
  align-items:start;
}

/* ---------- rail (aside, left) ---------- */
.rail{
  position:sticky;
  top:22px;
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid var(--glass-line);
  border-radius:24px 18px 22px 16px;
  padding:15px 13px;
  box-shadow:var(--shadow-s);
}
.rail-label{
  margin:0 0 8px 4px;
  font-size:16px;
  letter-spacing:.14em;
  color:var(--muted);
}
.rail-list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:2px;
}
.rail-list a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:6px 12px;
  border-radius:16px 12px 16px 12px;
  font-size:16px;
  text-decoration:none;
  color:var(--ink);
}
.rail-list a:hover{
  background:rgba(86,34,139,.1);
  color:var(--violet);
}

/* ---------- prose ---------- */
.prose{
  background:var(--glass);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  border:1px solid var(--glass-line);
  border-radius:28px 20px 26px 18px;
  padding:clamp(22px,3.4vw,42px);
  box-shadow:var(--shadow-m);
}
.lead h2{
  margin:0;
  font-size:clamp(21px,2.4vw,26px);
  line-height:1.36;
  font-weight:600;
  letter-spacing:-.01em;
}
.lead .subtitle{
  margin:8px 0 0;
  font-size:17px;
  line-height:1.7;
  color:var(--muted);
}
.prose > article{
  margin-top:clamp(26px,3.6vw,42px);
  padding-top:clamp(24px,3.4vw,36px);
  border-top:1px solid var(--line);
  scroll-margin-top:20px;
}
.prose > article:first-of-type{
  border-top:0;
  margin-top:clamp(22px,3vw,32px);
  padding-top:0;
}
.prose h2{
  position:relative;
  margin:0 0 .55em;
  padding-left:18px;
  font-size:clamp(21px,2.6vw,27px);
  line-height:1.36;
  font-weight:600;
  letter-spacing:-.01em;
}
.prose h2::before{
  content:'';
  position:absolute;
  left:0;
  top:.34em;
  width:8px;
  height:.92em;
  border-radius:9px 4px 9px 4px;
  background:linear-gradient(180deg,var(--violet),var(--ochre));
}
.prose h3{
  margin:1.5em 0 .5em;
  font-size:19px;
  line-height:1.45;
  font-weight:600;
  color:var(--violet);
}
.prose p{margin:0 0 1.05em}
.prose p:last-child{margin-bottom:0}
.prose ul,
.prose ol{margin:0 0 1.1em;padding-left:1.35em}
.prose li{margin:.35em 0}
.prose li::marker{color:var(--ochre)}
.prose img{
  display:block;
  height:auto;
  margin:1.2em 0;
  border-radius:22px 16px 20px 18px;
  box-shadow:var(--shadow-s);
}
.prose blockquote{
  margin:1.2em 0;
  padding:14px 20px;
  border-left:4px solid var(--ochre);
  border-radius:6px 18px 18px 6px;
  background:rgba(139,69,19,.07);
  color:var(--ink);
}
.prose blockquote p:last-child{margin-bottom:0}
.prose strong{font-weight:600;color:var(--violet)}
.prose code{
  font-size:16px;
  padding:2px 6px;
  border-radius:8px;
  background:rgba(31,23,38,.08);
}
.prose pre{
  overflow-x:auto;
  padding:16px 18px;
  border-radius:18px;
  background:rgba(31,23,38,.9);
  color:#f6f0ea;
}
.prose pre code{background:none;padding:0;color:inherit}
.prose table{
  width:100%;
  border-collapse:collapse;
  margin:1.2em 0;
  font-size:16px;
}
.prose th,
.prose td{
  padding:10px 12px;
  border-bottom:1px solid var(--line);
  text-align:left;
}
.prose th{color:var(--violet);font-weight:600}
.prose hr{
  border:0;
  height:1px;
  margin:1.8em 0;
  background:var(--line);
}

/* ---------- dock (fixed bottom bar) ---------- */
.dock{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:40;
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 14px calc(10px + env(safe-area-inset-bottom));
  background:rgba(250,246,241,.84);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  border-top:1px solid rgba(255,255,255,.85);
  border-radius:22px 22px 0 0;
  box-shadow:0 -20px 44px -32px rgba(31,23,38,.65);
}
.dock-mark{
  flex:0 0 auto;
  width:40px;
  height:40px;
  display:grid;
  place-items:center;
  overflow:hidden;
  border-radius:15px 11px 14px 12px;
  background:linear-gradient(140deg,var(--violet),var(--ochre));
  color:#fff;
  font-weight:600;
  font-size:16px;
  text-decoration:none;
  box-shadow:0 10px 22px -14px rgba(86,34,139,.9);
}
.dock-mark img{width:100%;height:100%;object-fit:cover;display:block}
.dock-scroll{
  flex:1 1 auto;
  min-width:0;
  display:flex;
  gap:4px;
  overflow-x:auto;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.dock-scroll::-webkit-scrollbar{display:none}
.dock-scroll a{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:0 12px;
  border-radius:15px 12px 15px 12px;
  font-size:16px;
  white-space:nowrap;
  text-decoration:none;
  color:var(--ink);
}
.dock-scroll a:hover{background:rgba(86,34,139,.11);color:var(--violet)}
.dock-cta{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:0 16px;
  border-radius:17px 13px 16px 13px;
  font-size:16px;
  font-weight:600;
  white-space:nowrap;
  text-decoration:none;
  color:#fff;
  background:linear-gradient(135deg,var(--violet),var(--violet-soft));
  box-shadow:0 12px 26px -14px rgba(86,34,139,.95);
}
.dock-cta:hover{color:#fff;background:linear-gradient(135deg,var(--ochre),var(--violet))}

/* ---------- footer ---------- */
.foot{
  max-width:var(--max);
  margin:0 auto;
  padding:20px 20px calc(92px + env(safe-area-inset-bottom));
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 20px;
  border-top:1px solid var(--line);
}
.copy{
  order:1;
  margin:0;
  font-size:16px;
  color:var(--muted);
}
.foot-nav{
  order:2;
  margin-left:auto;
  display:flex;
  flex-wrap:wrap;
  gap:6px 26px;
}
.foot-nav dl{margin:0;min-width:92px}
.foot-nav dt{
  font-size:16px;
  letter-spacing:.12em;
  color:var(--muted);
}
.foot-nav dd{margin:0}
.foot-nav a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  font-size:16px;
  text-decoration:none;
  color:var(--ink);
  border-bottom:1px solid transparent;
}
.foot-nav a:hover{color:var(--violet);border-bottom-color:var(--violet)}
.top{
  order:3;
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:0 14px;
  border-radius:16px 12px 16px 12px;
  font-size:16px;
  text-decoration:none;
  color:var(--ink);
  background:rgba(255,255,255,.6);
  border:1px solid var(--glass-line);
}
.top:hover{color:var(--violet)}

/* ---------- reveal ---------- */
html.js .rv{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .62s ease,transform .62s ease;
}
html.js .rv.in{opacity:1;transform:none}

/* ---------- desktop dock centering ---------- */
@media (min-width:900px){
  .dock{padding-left:max(16px,calc((100vw - var(--max)) / 2));padding-right:max(16px,calc((100vw - var(--max)) / 2))}
}

/* ---------- narrow ---------- */
@media (max-width:760px){
  body{font-size:16px}
  .wrap{grid-template-columns:minmax(0,1fr);gap:16px}
  .rail{position:static;padding:12px;border-radius:22px 16px 20px 16px}
  .rail-label{margin:0 0 6px 4px}
  .rail-list{flex-direction:row;gap:4px;overflow-x:auto;scrollbar-width:none;margin:0 -4px;padding:0 4px}
  .rail-list::-webkit-scrollbar{display:none}
  .rail-list li{flex:0 0 auto}
  .prose{padding:20px 18px;border-radius:24px 18px 22px 16px}
  .hero{min-height:45vh;padding-top:24px}
  .hero-figure img{border-radius:38% 62% 50% 50% / 18% 20% 28% 22%}
  .foot{padding-bottom:calc(100px + env(safe-area-inset-bottom))}
  .foot-nav{width:100%;order:3;margin-left:0;gap:6px 18px;justify-content:space-between}
  .foot-nav dl{min-width:88px}
  .top{order:2;margin-left:auto}
  .copy{order:1}
}

@media (max-width:400px){
  .dock-cta{padding:0 12px}
  .dock-scroll a{padding:0 10px}
}

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

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