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

:root{
  --mint:#b4fde1;
  --sky:#add8e6;
  --ink:#172620;
  --ink-soft:#1e3129;
  --line:rgba(180,253,225,.26);
  --line-strong:rgba(180,253,225,.42);
  --text:#e8fdf5;
  --muted:#a9c9bd;
  --r-lg:28px;
  --r-md:20px;
  --r-sm:14px;
  --clay-inset: inset -3px -3px 11px rgba(0,0,0,.42), inset 3px 3px 11px rgba(180,253,225,.12);
  --clay-out: 7px 9px 24px rgba(0,0,0,.44);
}

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

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

body{
  margin:0;
  min-height:100vh;
  color:var(--text);
  font-family:'Raleway', system-ui, -apple-system, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size:17px;
  line-height:1.78;
  letter-spacing:.01em;
  background:
    radial-gradient(1100px 620px at 82% -12%, rgba(173,216,230,.18), transparent 62%),
    radial-gradient(900px 520px at 2% 8%, rgba(180,253,225,.16), transparent 60%),
    radial-gradient(700px 700px at 50% 108%, rgba(173,216,230,.10), transparent 65%),
    var(--ink);
  background-attachment:fixed;
  overflow-x:hidden;
}

img{max-width:100%;height:auto;display:block;}
a{color:var(--mint);text-decoration:none;}
a:hover{color:#ffffff;}
h1,h2,h3,h4{font-family:'Lora', Georgia, 'Songti SC', serif;font-weight:600;line-height:1.24;letter-spacing:-.01em;}
p{margin:0 0 1em;}
menu{margin:0;padding:0;list-style:none;}
ul,ol{padding-left:1.2em;}
small{
  display:block;
  font-family:'Raleway', system-ui, sans-serif;
  font-size:14px;
  line-height:1.4;
  letter-spacing:.16em;
  color:var(--sky);
  margin-bottom:6px;
  font-weight:600;
}

/* ── 顶部条 ───────────────────────────── */
.topwrap{
  position:sticky;
  top:0;
  z-index:70;
  background:linear-gradient(180deg, rgba(23,38,32,.97) 40%, rgba(23,38,32,.82));
  backdrop-filter:blur(14px);
  border-bottom:3px solid var(--line);
}

.bar{
  display:flex;
  align-items:center;
  gap:12px;
  max-width:1220px;
  margin:0 auto;
  padding:10px 18px 8px;
}

.mark{
  flex:0 0 auto;
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  border-radius:16px;
  border:3px solid var(--line-strong);
  background:linear-gradient(155deg, rgba(180,253,225,.24), rgba(173,216,230,.10));
  box-shadow:var(--clay-inset), 4px 5px 14px rgba(0,0,0,.42);
  transition:transform .22s cubic-bezier(.34,1.56,.64,1);
}
.mark img{width:30px;height:30px;border-radius:10px;object-fit:cover;}
.mark .glyph{font-family:'Lora', serif;font-size:20px;color:var(--mint);}
.mark:hover{transform:translateY(-2px) scale(1.04);}

.dropper{position:relative;}
.dropper summary{
  list-style:none;
  cursor:pointer;
  display:inline-flex;
  align-items:center;
  gap:9px;
  min-height:46px;
  padding:0 18px;
  border-radius:16px;
  border:3px solid var(--line);
  background:linear-gradient(155deg, rgba(180,253,225,.16), rgba(173,216,230,.07));
  box-shadow:var(--clay-inset), 4px 5px 14px rgba(0,0,0,.36);
  font-weight:700;
  font-size:16px;
  color:var(--text);
  transition:transform .2s ease-out, background .2s ease-out;
}
.dropper summary::-webkit-details-marker{display:none;}
.dropper summary::after{
  content:"";
  width:9px;height:9px;
  border-right:3px solid var(--mint);
  border-bottom:3px solid var(--mint);
  transform:rotate(45deg) translate(-2px,-2px);
  transition:transform .22s ease-out;
}
.dropper[open] summary{background:linear-gradient(155deg, rgba(180,253,225,.28), rgba(173,216,230,.14));}
.dropper[open] summary::after{transform:rotate(-135deg) translate(-3px,-3px);}
.dropper summary:active{transform:translateY(2px) scale(.99);}

.dropper menu{
  position:absolute;
  left:0;
  top:calc(100% + 12px);
  width:min(80vw, 268px);
  padding:10px;
  display:grid;
  gap:3px;
  border:3px solid var(--line-strong);
  border-radius:22px;
  background:linear-gradient(160deg, #21362d, #16241e);
  box-shadow:var(--clay-inset), 9px 12px 30px rgba(0,0,0,.55);
  z-index:80;
  animation:pop .24s cubic-bezier(.34,1.56,.64,1) both;
}
.dropper menu a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:6px 14px;
  border-radius:13px;
  font-size:16px;
  color:var(--text);
  transition:background .18s ease-out, transform .18s ease-out;
}
.dropper menu a:hover{background:rgba(180,253,225,.16);transform:translateX(3px);}

.barcta{
  margin-left:auto;
  display:inline-flex;
  align-items:center;
  min-height:46px;
  padding:0 18px;
  border-radius:16px;
  border:3px solid rgba(23,38,32,.4);
  background:linear-gradient(150deg, var(--mint), var(--sky));
  color:#12211b;
  font-weight:700;
  font-size:16px;
  box-shadow:inset -3px -3px 10px rgba(23,38,32,.24), inset 3px 3px 10px rgba(255,255,255,.6), 5px 6px 16px rgba(0,0,0,.42);
  transition:transform .2s ease-out;
}
.barcta:hover{color:#0b1712;transform:translateY(-2px);}
.barcta:active{transform:translateY(2px) scale(.98);}

.chips{
  display:flex;
  gap:8px;
  padding:2px 18px 12px;
  max-width:1220px;
  margin:0 auto;
  overflow-x:auto;
  scrollbar-width:none;
}
.chips::-webkit-scrollbar{display:none;}
.chip{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:0 15px;
  border-radius:13px;
  border:2px solid var(--line);
  background:rgba(180,253,225,.07);
  color:var(--muted);
  font-size:15px;
  white-space:nowrap;
  transition:color .18s ease-out, background .18s ease-out, border-color .18s ease-out;
}
.chip:hover,.chip.on{
  color:#12211b;
  background:linear-gradient(150deg, var(--mint), var(--sky));
  border-color:transparent;
}

/* ── 首屏 ─────────────────────────────── */
.hero{
  position:relative;
  overflow:hidden;
  isolation:isolate;
}
.hero-in{
  max-width:1220px;
  margin:0 auto;
  padding:clamp(26px,5vw,64px) 18px clamp(64px,8vw,110px);
  display:grid;
  grid-template-columns:1.06fr .94fr;
  gap:clamp(20px,4vw,52px);
  align-items:center;
  min-height:calc(100vh - 118px);
}
.hero-copy{text-align:center;max-width:32ch;margin:0 auto;}
.hero h1{
  font-size:clamp(31px, 5.6vw, 58px);
  margin:0 0 18px;
  color:#f2fffa;
  text-shadow:0 4px 18px rgba(0,0,0,.4);
}
.lede{
  font-size:clamp(16px,1.9vw,19px);
  color:var(--muted);
  margin:0 auto 26px;
  max-width:30ch;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:50px;
  padding:0 26px;
  border-radius:18px;
  border:3px solid rgba(23,38,32,.34);
  background:linear-gradient(150deg, var(--mint), var(--sky));
  color:#12211b;
  font-weight:700;
  font-size:17px;
  letter-spacing:.02em;
  box-shadow:inset -3px -3px 12px rgba(23,38,32,.26), inset 3px 3px 12px rgba(255,255,255,.6), 7px 9px 22px rgba(0,0,0,.45);
  transition:transform .2s ease-out, box-shadow .2s ease-out;
}
.btn:hover{color:#0b1712;transform:translateY(-3px);}
.btn:active{
  transform:translateY(2px) scale(.985);
  box-shadow:inset 3px 3px 12px rgba(23,38,32,.34), inset -3px -3px 12px rgba(255,255,255,.4), 3px 4px 12px rgba(0,0,0,.4);
}

.hero-side{display:flex;justify-content:center;}
.art-frame{
  margin:0;
  width:100%;
  max-width:430px;
  aspect-ratio:4 / 4.6;
  border-radius:32px;
  border:4px solid var(--line-strong);
  overflow:hidden;
  background:linear-gradient(160deg, rgba(180,253,225,.22), rgba(173,216,230,.14));
  box-shadow:inset -5px -5px 18px rgba(0,0,0,.4), inset 5px 5px 18px rgba(180,253,225,.2), 12px 16px 40px rgba(0,0,0,.5);
}
.art-frame img{width:100%;height:100%;object-fit:cover;}
.blob{
  background:
    radial-gradient(circle at 32% 26%, rgba(255,255,255,.42), transparent 44%),
    conic-gradient(from 200deg at 60% 60%, var(--mint), var(--sky), #2c4d40, var(--mint));
  filter:saturate(1.02);
}

.band{
  position:absolute;
  left:-8%;
  right:-8%;
  bottom:-46px;
  height:96px;
  background:linear-gradient(90deg, var(--mint), var(--sky));
  transform:skewY(-2.6deg);
  border-radius:26px 26px 0 0;
  opacity:.88;
  z-index:-1;
  box-shadow:0 -8px 30px rgba(180,253,225,.22);
}

/* ── 主体 ─────────────────────────────── */
.stage{
  max-width:1220px;
  margin:0 auto;
  padding:clamp(22px,4vw,44px) 18px clamp(40px,6vw,80px);
}
main{
  display:grid;
  grid-template-columns:240px minmax(0,1fr);
  gap:clamp(18px,3vw,36px);
  align-items:start;
}

.rail{
  position:sticky;
  top:132px;
  padding:20px 18px;
  border-radius:24px;
  border:3px solid var(--line);
  background:linear-gradient(160deg, rgba(180,253,225,.11), rgba(173,216,230,.05));
  backdrop-filter:blur(9px);
  box-shadow:var(--clay-inset), var(--clay-out);
}
.rail h2{
  font-size:22px;
  margin:0 0 14px;
  color:#f0fffa;
}
.raillist{list-style:none;padding:0;margin:0;display:grid;gap:6px;}
.raillist a{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:42px;
  padding:6px 10px;
  border-radius:12px;
  color:var(--muted);
  font-size:15px;
  line-height:1.4;
  transition:background .18s ease-out, color .18s ease-out, transform .18s ease-out;
}
.raillist a b{
  font-family:'Lora', serif;
  font-size:13px;
  letter-spacing:.06em;
  color:var(--sky);
  font-weight:600;
}
.raillist a:hover{background:rgba(180,253,225,.14);color:var(--text);transform:translateX(3px);}

.prose{min-width:0;}
.prose > section{
  margin:0 0 22px;
  padding:clamp(18px,3.2vw,36px);
  border-radius:28px;
  border:3px solid var(--line);
  background:linear-gradient(158deg, rgba(180,253,225,.10), rgba(173,216,230,.055));
  backdrop-filter:blur(8px);
  box-shadow:var(--clay-inset), var(--clay-out);
  scroll-margin-top:140px;
  animation:rise .55s cubic-bezier(.34,1.56,.64,1) both;
}
.prose > section:nth-child(2){animation-delay:.05s;}
.prose > section:nth-child(3){animation-delay:.1s;}
.prose > section:nth-child(4){animation-delay:.15s;}
.prose > section:nth-child(5){animation-delay:.2s;}
.prose > section:nth-child(6){animation-delay:.25s;}
.prose > section:nth-child(7){animation-delay:.3s;}
.prose > section:last-child{margin-bottom:0;}

.prose h2{
  font-size:clamp(23px,3vw,31px);
  margin:0 0 16px;
  color:#f3fffb;
}
.prose h3{
  font-size:clamp(19px,2.2vw,23px);
  margin:26px 0 12px;
  color:var(--mint);
}
.prose p{color:#ddf6ec;}
.prose li{margin-bottom:.5em;color:#ddf6ec;}
.prose strong{color:var(--mint);}
.prose blockquote{
  margin:20px 0;
  padding:14px 20px;
  border-left:5px solid var(--sky);
  border-radius:0 16px 16px 0;
  background:rgba(173,216,230,.10);
  color:#eaf9f2;
}
.prose blockquote p:last-child{margin-bottom:0;}
.prose a{
  color:var(--mint);
  border-bottom:2px solid rgba(180,253,225,.45);
  transition:border-color .18s ease-out, color .18s ease-out;
}
.prose a:hover{color:#fff;border-color:#fff;}
.prose img{border-radius:20px;border:3px solid var(--line);margin:18px 0;}
.prose table{width:100%;border-collapse:collapse;font-size:16px;}
.prose td,.prose th{border:2px solid var(--line);padding:9px 12px;text-align:left;}

/* ── 页脚 ─────────────────────────────── */
.foot{
  border-top:3px solid var(--line);
  background:linear-gradient(180deg, rgba(30,49,41,.9), rgba(18,30,25,.96));
  padding:clamp(26px,4vw,48px) 18px 24px;
}
.foot > *{max-width:1220px;margin-left:auto;margin-right:auto;}

.cta{
  max-width:1220px;
  padding:clamp(24px,4vw,44px);
  border-radius:30px;
  border:4px solid rgba(23,38,32,.3);
  background:linear-gradient(150deg, var(--mint), var(--sky));
  color:#12211b;
  text-align:center;
  box-shadow:inset -5px -5px 16px rgba(23,38,32,.2), inset 5px 5px 16px rgba(255,255,255,.55), 10px 13px 34px rgba(0,0,0,.5);
  margin-bottom:clamp(24px,4vw,44px);
}
.cta small{color:#28453a;margin-bottom:8px;}
.cta h2{
  font-size:clamp(25px,4.2vw,40px);
  margin:0 0 20px;
  color:#0f1d17;
}
.cta .btn{
  background:#172620;
  color:#d9ffee;
  border-color:rgba(23,38,32,.5);
  box-shadow:inset -3px -3px 12px rgba(0,0,0,.5), inset 3px 3px 12px rgba(180,253,225,.22), 6px 8px 20px rgba(0,0,0,.35);
}
.cta .btn:hover{color:#ffffff;}

.fgrid{
  display:grid;
  grid-template-columns:repeat(3, minmax(0,1fr));
  gap:clamp(16px,3vw,36px);
  padding:clamp(12px,2vw,22px) 0 clamp(18px,3vw,30px);
  border-bottom:2px solid var(--line);
}
.fgrid dl{margin:0 0 8px;}
.fgrid dt{
  font-family:'Lora', serif;
  font-size:16px;
  color:var(--mint);
  letter-spacing:.14em;
  margin-bottom:10px;
}
.fgrid dd{
  margin:0 0 4px;
  font-size:15px;
  color:var(--muted);
}
.fgrid dd a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  color:var(--muted);
  transition:color .18s ease-out, transform .18s ease-out;
}
.fgrid dd a:hover{color:var(--mint);transform:translateX(3px);}

.copy{
  margin:18px auto 0;
  text-align:center;
  font-size:14px;
  letter-spacing:.1em;
  color:#89a99d;
}

@keyframes rise{
  from{opacity:0;transform:translateY(22px) scale(.985);}
  to{opacity:1;transform:none;}
}
@keyframes pop{
  from{opacity:0;transform:translateY(-8px) scale(.96);}
  to{opacity:1;transform:none;}
}

/* ── 断点 ─────────────────────────────── */
@media (max-width:920px){
  main{grid-template-columns:1fr;}
  .rail{position:static;padding:16px;}
  .raillist{grid-template-columns:repeat(2, minmax(0,1fr));}
  .hero-in{
    grid-template-columns:1fr;
    min-height:0;
    padding-bottom:clamp(70px,12vw,96px);
  }
  .hero-side{order:2;}
  .art-frame{max-width:360px;aspect-ratio:4 / 3.4;}
}

@media (max-width:620px){
  body{font-size:16px;}
  .bar{padding:9px 14px 7px;gap:10px;}
  .chips{padding:2px 14px 11px;}
  .barcta{padding:0 14px;font-size:15px;}
  .dropper summary{padding:0 14px;font-size:15px;}
  .stage{padding-left:14px;padding-right:14px;}
  .fgrid{grid-template-columns:1fr;}
  .fgrid dl{padding-bottom:10px;}
  .foot{padding-left:14px;padding-right:14px;}
  .prose > section{border-radius:24px;}
  .hero h1{font-size:clamp(29px,9vw,40px);}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-delay:0ms !important;
    transition-duration:.001ms !important;
  }
}

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