@import url('https://fonts.googleapis.com/css2?family=Atkinson+Hyperlegible:wght@400;700&display=swap');

:root{
  --mint:#b4fde1;
  --mint-2:#83efcb;
  --sky:#add8e6;
  --sky-2:#8ac4dd;
  --ink:#172620;
  --ink-soft:rgba(23,38,32,.74);
  --paper:#f1fffa;
  --line:3px solid rgba(23,38,32,.82);
  --r-lg:28px;
  --r-md:22px;
  --clay: inset -4px -5px 12px rgba(23,38,32,.14), inset 4px 5px 12px rgba(255,255,255,.72), 8px 10px 0 rgba(23,38,32,.16);
  --clay-soft: inset -3px -3px 8px rgba(23,38,32,.1), inset 3px 3px 8px rgba(255,255,255,.78), 4px 5px 0 rgba(23,38,32,.12);
  --font:'Atkinson Hyperlegible', ui-sans-serif, system-ui, -apple-system, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

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

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

body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.75;
  color:var(--ink);
  background:
    radial-gradient(900px 480px at 88% -10%, #ddf6ff 0%, rgba(221,246,255,0) 62%),
    radial-gradient(720px 420px at 4% 2%, #d6fded 0%, rgba(214,253,237,0) 60%),
    linear-gradient(170deg,#f8fffc 0%,#eef9ff 48%,#e9fbf3 100%);
  background-attachment:fixed;
  padding:0 0 152px;
  overflow-x:hidden;
}

img{display:block;max-width:100%;height:auto}
a{color:#0f5c46;text-decoration-thickness:2px;text-underline-offset:3px}
a:hover{color:#0b3d2f}
:focus-visible{outline:3px solid var(--ink);outline-offset:3px}

hr{
  border:0;
  height:4px;
  border-radius:999px;
  background:linear-gradient(90deg,var(--mint-2),var(--sky));
  box-shadow:inset 0 -1px 0 rgba(23,38,32,.2);
}

.wrap{
  max-width:1180px;
  margin:0 auto;
  padding:34px 22px 0;
  display:grid;
  grid-template-columns:238px minmax(0,1fr);
  gap:26px;
  align-items:start;
}

/* 左侧目录 */
.rail{
  position:sticky;
  top:22px;
  padding:18px 16px 20px;
  border:var(--line);
  border-radius:var(--r-md);
  background:linear-gradient(165deg,#ffffff 0%,#e9fff6 100%);
  box-shadow:var(--clay-soft);
}
.rail-title{
  margin:0;
  font-size:16px;
  font-weight:700;
  letter-spacing:.3em;
  color:var(--ink-soft);
}
.rail hr{margin:10px 0 14px}
.rail-list{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.rail-list li{animation:pop .5s cubic-bezier(.34,1.56,.64,1) both}
.rail-list li:nth-child(1){animation-delay:.02s}
.rail-list li:nth-child(2){animation-delay:.06s}
.rail-list li:nth-child(3){animation-delay:.1s}
.rail-list li:nth-child(4){animation-delay:.14s}
.rail-list li:nth-child(5){animation-delay:.18s}
.rail-list li:nth-child(6){animation-delay:.22s}
.rail-list li:nth-child(7){animation-delay:.26s}
.rail-list a{
  display:flex;
  align-items:center;
  gap:9px;
  min-height:44px;
  padding:8px 12px;
  border-radius:999px;
  font-size:16px;
  font-weight:700;
  color:var(--ink);
  text-decoration:none;
  background:rgba(255,255,255,.74);
  border:2px solid rgba(23,38,32,.14);
  box-shadow:inset -2px -2px 6px rgba(23,38,32,.08), inset 2px 2px 6px #fff;
  transition:transform .2s ease-out, background .2s ease-out;
}
.rail-list a:hover{transform:translate(-2px,-2px);background:var(--mint)}
.tick{flex:none;width:10px;height:10px;border-radius:50%;background:var(--sky);border:2px solid var(--ink)}

@keyframes pop{
  from{opacity:0;transform:translateY(10px) scale(.97)}
  to{opacity:1;transform:none}
}

/* 正文面板 */
.stage{min-width:0}
.sheet{
  padding:clamp(16px,2.8vw,34px);
  border:4px solid var(--ink);
  border-radius:var(--r-lg);
  background:linear-gradient(180deg,#ffffff 0%,#f5fffb 58%,#eefbff 100%);
  box-shadow:var(--clay);
}

.hero{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  gap:18px;
  align-items:center;
  min-height:45vh;
  padding:clamp(14px,2.4vw,26px);
  border:3px solid rgba(23,38,32,.78);
  border-radius:24px;
  background:
    radial-gradient(420px 220px at 92% 6%, #e8f9ff 0%, rgba(232,249,255,0) 70%),
    linear-gradient(140deg,var(--mint) 0%,#dafbef 46%,#ddf1fb 100%);
  box-shadow:inset -4px -6px 14px rgba(23,38,32,.12), inset 5px 6px 14px rgba(255,255,255,.8);
}
.hero-copy{min-width:0}
h1{margin:0 0 12px;font-size:clamp(28px,4.6vw,50px);line-height:1.24;font-weight:700}
.hero-lede{margin:0;font-size:17px;line-height:1.8;color:var(--ink-soft);max-width:52ch}

.hero-art{
  position:relative;
  width:172px;
  height:172px;
  display:grid;
  place-items:center;
  border:3px solid var(--ink);
  border-radius:50%;
  background:linear-gradient(150deg,#ffffff,#d9fbef);
  box-shadow:var(--clay-soft);
  will-change:transform;
}
.hero-img{width:100%;height:100%;object-fit:cover;border-radius:50%}
.mark{font-size:36px;font-weight:700;line-height:1;color:var(--ink)}
.sticker{
  position:absolute;
  left:-18px;
  bottom:-10px;
  transform:rotate(-6deg);
  padding:6px 15px;
  border:3px solid var(--ink);
  border-radius:999px;
  background:var(--sky);
  font-size:16px;
  font-weight:700;
  white-space:nowrap;
  box-shadow:0 4px 0 rgba(23,38,32,.22);
  will-change:transform;
}

/* 正文内容 */
.sheet > article{padding:4px 0 8px;scroll-margin-top:26px}
.sheet > article + article{margin-top:22px;padding-top:26px;border-top:3px dashed rgba(23,38,32,.16)}
.sheet h2{
  width:fit-content;
  max-width:100%;
  margin:26px 0 0;
  padding:12px 20px;
  font-size:clamp(20px,2.5vw,26px);
  line-height:1.4;
  border:3px solid rgba(23,38,32,.82);
  border-radius:18px;
  background:linear-gradient(150deg,var(--mint),#dcfbf1);
  box-shadow:inset -3px -4px 10px rgba(23,38,32,.12), inset 3px 4px 10px rgba(255,255,255,.82), 5px 6px 0 rgba(23,38,32,.14);
}
.sheet h2 + hr{margin:12px 0 18px}
.sheet h3{
  margin:22px 0 10px;
  font-size:clamp(18px,2.1vw,21px);
  line-height:1.45;
}
.sheet h3 + hr{margin:10px 0 16px}
.sheet p{margin:0 0 16px;line-height:1.85;max-width:70ch}
.sheet ul,.sheet ol{margin:0 0 18px;padding-left:1.4em;line-height:1.8}
.sheet li{margin:6px 0}
.sheet blockquote{
  margin:18px 0;
  padding:14px 18px;
  border:3px solid rgba(23,38,32,.38);
  border-radius:18px;
  background:#eef9ff;
  box-shadow:var(--clay-soft);
}
.sheet blockquote p:last-child{margin-bottom:0}
.sheet table{width:100%;border-collapse:separate;border-spacing:0;margin:18px 0;font-size:16px}
.sheet th,.sheet td{padding:10px 12px;text-align:left;border-bottom:2px solid rgba(23,38,32,.14)}
.sheet th{background:var(--mint);border-bottom:3px solid rgba(23,38,32,.5)}
.sheet code{font-size:16px;padding:1px 6px;border-radius:8px;background:#e7f7f0}
.sheet img{margin:16px 0;border:3px solid var(--ink);border-radius:20px;box-shadow:var(--clay-soft)}

/* 底部固定导航 */
.dock{
  position:fixed;
  left:0;
  right:0;
  bottom:14px;
  z-index:60;
  display:flex;
  justify-content:center;
  padding:0 12px;
  pointer-events:none;
}
.dock-bar{
  pointer-events:auto;
  display:flex;
  align-items:center;
  gap:7px;
  max-width:100%;
  padding:8px 10px;
  border:3px solid var(--ink);
  border-radius:999px;
  background:linear-gradient(160deg,#ffffff 0%,var(--mint) 55%,#ccefFB 100%);
  background:linear-gradient(160deg,#ffffff 0%,var(--mint) 55%,#cceffb 100%);
  box-shadow:inset -3px -4px 10px rgba(23,38,32,.14), inset 3px 4px 10px rgba(255,255,255,.86), 0 10px 0 rgba(23,38,32,.16);
  overflow-x:auto;
  scrollbar-width:none;
}
.dock-bar::-webkit-scrollbar{display:none}
.dock-side{display:flex;align-items:center;gap:6px;list-style:none;margin:0;padding:0}
.dock-bar a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:9px 14px;
  border:2px solid rgba(23,38,32,.2);
  border-radius:999px;
  background:rgba(255,255,255,.72);
  color:var(--ink);
  font-size:16px;
  font-weight:700;
  text-decoration:none;
  white-space:nowrap;
  transition:transform .18s ease-out, background .18s ease-out;
}
.dock-bar a:hover{transform:translateY(-2px);background:#fff}
.dock-bar a:active{transform:translateY(1px) scale(.98)}
.mark-sm{font-size:17px;font-weight:700;line-height:1;margin-right:6px}
.dock-brand{background:var(--ink);color:var(--paper);border-color:var(--ink);padding:9px 18px}
.dock-brand:hover{color:#fff}
.dock-cta a{background:var(--sky);border-color:rgba(23,38,32,.55)}

/* 页脚 */
.foot{
  max-width:1180px;
  margin:34px auto 0;
  padding:0 22px;
  display:grid;
  gap:20px;
}
.foot-cta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:24px 26px;
  border:4px solid var(--ink);
  border-radius:28px;
  background:linear-gradient(150deg,var(--sky) 0%,#d0eaf7 52%,var(--mint) 100%);
  box-shadow:var(--clay);
}
.cta-word{margin:0;font-size:clamp(20px,3vw,30px);font-weight:700}
.cta-btn{
  display:inline-flex;
  align-items:center;
  min-height:48px;
  padding:12px 26px;
  border-radius:999px;
  background:var(--ink);
  color:var(--paper);
  font-weight:700;
  text-decoration:none;
  box-shadow:0 5px 0 rgba(23,38,32,.3);
  transition:transform .2s ease-out;
}
.cta-btn:hover{transform:translateY(-2px);color:#fff}
.foot-top{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:16px 20px;
  border:3px solid rgba(23,38,32,.8);
  border-radius:24px;
  background:#fff;
  box-shadow:var(--clay-soft);
}
.foot-id{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700}
.foot-mark{
  display:grid;
  place-items:center;
  width:40px;
  height:40px;
  border:3px solid var(--ink);
  border-radius:14px;
  background:var(--mint);
  font-size:18px;
  font-weight:700;
}
.foot-up{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:8px 18px;
  border:2px solid rgba(23,38,32,.3);
  border-radius:999px;
  background:var(--mint);
  color:var(--ink);
  font-weight:700;
  text-decoration:none;
}
.foot-up:hover{background:var(--mint-2)}
.foot-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.foot-cols dl{
  margin:0;
  padding:16px 18px;
  border:3px solid rgba(23,38,32,.68);
  border-radius:22px;
  background:rgba(255,255,255,.84);
  box-shadow:var(--clay-soft);
}
.foot-cols dt{font-size:16px;font-weight:700;letter-spacing:.04em;margin-bottom:8px}
.foot-cols dd{margin:0}
.foot-cols dd a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  color:#0f5c46;
  font-size:16px;
  font-weight:700;
  text-decoration:none;
}
.foot-cols dd a:hover{text-decoration:underline}
.foot-bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:4px 4px 0;
  color:var(--ink-soft);
  font-size:16px;
}
.copy{margin:0}
.mini{display:flex;flex-wrap:wrap;gap:16px;list-style:none;margin:0;padding:0}
.mini a{display:inline-flex;align-items:center;min-height:40px;color:#0f5c46;font-weight:700;text-decoration:none}
.mini a:hover{text-decoration:underline}

/* 滚动揭示 */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s ease-out, transform .55s cubic-bezier(.34,1.56,.64,1)}
.reveal.is-in{opacity:1;transform:none}

@media (max-width:900px){
  .wrap{grid-template-columns:minmax(0,1fr);gap:14px;padding:18px 14px 0}
  .rail{position:static;padding:10px 12px}
  .rail-title{letter-spacing:.2em}
  .rail hr{display:none}
  .rail-list{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;padding-bottom:2px}
  .rail-list::-webkit-scrollbar{display:none}
  .rail-list li{flex:none}
  .rail-list a{white-space:nowrap;padding:8px 14px}
  .hero{grid-template-columns:minmax(0,1fr);min-height:0;gap:14px}
  .hero-art{width:118px;height:118px;justify-self:start}
  .sticker{left:-8px;bottom:-12px}
  .dock-brand{order:-1}
  .foot{padding:0 14px}
  .foot-cols{grid-template-columns:minmax(0,1fr)}
  .foot-cta{padding:20px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
}

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