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

:root{
  --mint:#b4fde1;
  --blue:#add8e6;
  --ink:#172620;
  --edge:#2b4a3e;
  --clay: inset -3px -3px 9px rgba(23,38,32,.16), 7px 7px 18px rgba(23,38,32,.16);
  --clay-up: inset -3px -3px 9px rgba(23,38,32,.14), 0 -8px 18px rgba(23,38,32,.14);
  --glass: inset -2px -2px 8px rgba(23,38,32,.10), 4px 4px 12px rgba(23,38,32,.12);
}

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

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

body{
  margin:0;
  padding-bottom:calc(108px + env(safe-area-inset-bottom));
  font-family:'Exo',system-ui,-apple-system,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
  font-size:17px;
  line-height:1.8;
  color:var(--ink);
  background:
    radial-gradient(120% 70% at 8% 0%, #defff3 0%, rgba(222,255,243,0) 58%),
    radial-gradient(100% 60% at 96% 10%, #e3f3fc 0%, rgba(227,243,252,0) 55%),
    linear-gradient(180deg,#f7fffc 0%, #eefaf7 42%, #eef8fc 100%);
}

img{ max-width:100%; }
a{ color:#1c5a45; }
a:focus-visible,
button:focus-visible{ outline:3px solid #2f7f63; outline-offset:3px; }

small{
  display:inline-block;
  font-family:'Roboto Mono',ui-monospace,monospace;
  font-size:.72rem;
  letter-spacing:.16em;
  line-height:1.6;
  color:#20463a;
  padding:3px 10px;
  border:2px solid rgba(23,38,32,.35);
  border-radius:4px;
  background:rgba(180,253,225,.92);
  box-shadow:var(--glass);
}

/* ---------- 首屏 ---------- */
.hero{
  max-width:1140px;
  margin:0 auto;
  padding:24px 18px 10px;
  display:grid;
  grid-template-columns:1.02fr .98fr;
  gap:22px;
  align-items:center;
  min-height:45vh;
}

.hero-media{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  aspect-ratio:16 / 10;
  max-height:44vh;
  border:4px solid var(--edge);
  border-radius:26px;
  overflow:hidden;
  background:linear-gradient(155deg,var(--mint) 0%, #d8f6ff 46%, var(--blue) 100%);
  box-shadow:var(--clay);
  will-change:transform;
}

.hero-plate{
  width:64%;
  height:56%;
  border-radius:22px;
  border:3px dashed rgba(23,38,32,.35);
  background:radial-gradient(circle at 30% 25%, #ffffff8c, rgba(255,255,255,.1) 70%);
}

.hero-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}

.chips{
  position:absolute;
  left:12px;
  right:12px;
  bottom:12px;
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  justify-content:center;
}

.chip{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:0 14px;
  font-size:.92rem;
  text-decoration:none;
  color:var(--ink);
  border:3px solid rgba(23,38,32,.5);
  border-radius:4px;
  background:rgba(255,255,255,.55);
  backdrop-filter:blur(9px);
  -webkit-backdrop-filter:blur(9px);
  box-shadow:var(--glass);
  transition:transform .2s ease-out, background .2s ease-out;
}

.chip:hover{ transform:translateY(-3px); background:rgba(255,255,255,.82); }

.hero-copy{ text-align:center; }

.hero-copy h1{
  margin:0;
  font-size:clamp(1.75rem, 4.4vw, 2.9rem);
  line-height:1.28;
  letter-spacing:.01em;
  font-weight:700;
  text-shadow:0 2px 0 rgba(255,255,255,.75);
}

.hero-lead{
  margin:.7rem auto 0;
  max-width:34ch;
  font-size:1rem;
  color:#2c4a3e;
}

/* ---------- 正文骨架 ---------- */
main{ display:block; }

.wrap{
  max-width:1140px;
  margin:0 auto;
  padding:14px 18px 26px;
  display:grid;
  grid-template-columns:minmax(0,1fr) 272px;
  gap:22px;
  align-items:start;
}

.sheet{
  border:4px solid var(--edge);
  border-radius:28px;
  background:rgba(255,255,255,.74);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  box-shadow:var(--clay);
  padding:10px 22px 28px;
  overflow:hidden;
}

.prose{ display:block; }

.prose > div{
  scroll-margin-top:88px;
  scroll-margin-bottom:130px;
  padding-top:26px;
  border-top:3px dashed rgba(23,38,32,.22);
}

.prose > div + div{ margin-top:26px; }
.prose > div:first-child{ border-top:0; padding-top:0; }

.prose h2{
  font-size:clamp(1.35rem, 3vw, 1.85rem);
  line-height:1.36;
  margin:.15em 0 .55em;
}

.prose h3{
  font-size:clamp(1.1rem, 2.2vw, 1.32rem);
  line-height:1.45;
  margin:1.1em 0 .45em;
}

.prose small + h2,
.prose small + h3{ margin-top:.2em; }

.prose p{ margin:0 0 1.05em; }
.prose ul,.prose ol{ padding-left:1.35em; margin:0 0 1.05em; }
.prose li{ margin:.3em 0; }
.prose strong{ font-weight:600; }

.prose a{
  text-decoration:underline;
  text-decoration-thickness:2px;
  text-underline-offset:3px;
  text-decoration-color:rgba(47,127,99,.45);
}

.prose blockquote{
  margin:1.1em 0;
  padding:14px 16px;
  border:3px solid rgba(23,38,32,.45);
  border-radius:4px;
  background:rgba(255,255,255,.6);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  box-shadow:var(--glass);
}

.prose blockquote p:last-child{ margin-bottom:0; }

.prose figure{ margin:1.2em 0; }
.prose figure img{
  width:100%;
  height:auto;
  border:3px solid rgba(23,38,32,.5);
  border-radius:4px;
  box-shadow:var(--glass);
}
.prose figcaption{ font-size:.88rem; color:#3a5a4e; }

.prose pre{
  overflow-x:auto;
  padding:14px 16px;
  border:3px solid rgba(23,38,32,.45);
  border-radius:4px;
  background:#effaf5;
  font-family:'Roboto Mono',ui-monospace,monospace;
  font-size:.88rem;
  line-height:1.66;
}

.prose code{
  font-family:'Roboto Mono',ui-monospace,monospace;
  font-size:.9em;
}

.prose table{
  width:100%;
  border-collapse:collapse;
  margin:1.1em 0;
  font-size:.95rem;
}
.prose th,.prose td{
  border:2px solid rgba(23,38,32,.28);
  padding:9px 11px;
  text-align:left;
}
.prose th{ background:rgba(180,253,225,.6); }

/* ---------- 侧栏 ---------- */
.side{
  position:sticky;
  top:18px;
  padding:16px;
  border:3px solid rgba(23,38,32,.5);
  border-radius:4px;
  background:rgba(255,255,255,.55);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  box-shadow:var(--glass);
}

.side-title{
  font-size:1.16rem;
  line-height:1.4;
  margin:.35em 0 .6em;
  letter-spacing:.06em;
}

.side-list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:2px;
}

.side-list a{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:0 10px;
  border-radius:16px;
  text-decoration:none;
  color:var(--ink);
  font-size:.98rem;
  border:2px solid transparent;
  transition:background .2s ease-out, transform .2s ease-out;
}

.side-list a:hover{
  background:rgba(180,253,225,.85);
  border-color:rgba(23,38,32,.3);
  transform:translateX(3px);
}

/* ---------- 页脚 ---------- */
.foot{
  max-width:1140px;
  margin:20px auto 0;
  padding:0 18px 24px;
}

.cta{
  border:4px solid var(--edge);
  border-radius:30px;
  padding:28px 22px 30px;
  text-align:center;
  background:linear-gradient(150deg,var(--mint) 0%, #dbf6ff 50%, var(--blue) 100%);
  box-shadow:var(--clay-up);
}

.cta h2{
  margin:.5em 0 .8em;
  font-size:clamp(1.6rem, 4vw, 2.3rem);
  line-height:1.3;
  letter-spacing:.02em;
}

.cta-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:52px;
  padding:0 30px;
  font-size:1.02rem;
  font-weight:600;
  text-decoration:none;
  color:var(--ink);
  border:4px solid var(--edge);
  border-radius:22px;
  background:rgba(255,255,255,.86);
  box-shadow:var(--clay);
  transition:transform .2s ease-out, box-shadow .2s ease-out;
}

.cta-btn:hover{ transform:translateY(-3px); }
.cta-btn:active{ transform:translateY(1px); box-shadow:inset -2px -2px 8px rgba(23,38,32,.2), 2px 2px 6px rgba(23,38,32,.16); }

.foot-cols{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr;
  gap:20px;
  margin-top:24px;
}

.fcol{ margin:0; }

.fcol dt{
  font-family:'Roboto Mono',ui-monospace,monospace;
  font-size:.76rem;
  letter-spacing:.16em;
  color:#2f5a4a;
  padding-bottom:6px;
  border-bottom:2px solid rgba(23,38,32,.2);
}

.fcol dd{
  margin:.7em 0 0;
  display:flex;
  flex-direction:column;
  gap:2px;
}

.fcol dd a{
  display:flex;
  align-items:center;
  min-height:40px;
  color:var(--ink);
  text-decoration:none;
}

.fcol dd a:hover{ text-decoration:underline; text-underline-offset:4px; }

.fcol-text{
  display:block;
  font-size:.94rem;
  color:#35564a;
  line-height:1.72;
}

.legal{
  margin:22px 0 0;
  text-align:center;
  font-size:.86rem;
  letter-spacing:.06em;
  color:#33544a;
}

/* ---------- 底部固定条 ---------- */
.dock{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:60;
  padding:9px 10px calc(9px + env(safe-area-inset-bottom));
  border-top:4px solid var(--edge);
  background:linear-gradient(180deg, rgba(247,255,252,.62), rgba(233,249,245,.97));
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:0 -9px 24px rgba(23,38,32,.14);
}

.dock-list{
  position:relative;
  list-style:none;
  display:flex;
  align-items:center;
  gap:6px;
  margin:0 auto;
  padding:0 2px;
  max-width:1140px;
  overflow-x:auto;
  overflow-y:hidden;
  scrollbar-width:none;
  scroll-snap-type:x proximity;
}

.dock-list::-webkit-scrollbar{ display:none; }

.dock-list > li{
  flex:0 0 auto;
  scroll-snap-align:center;
}

.dock-list a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:0 13px;
  font-size:1rem;
  white-space:nowrap;
  text-decoration:none;
  color:var(--ink);
  border:2px solid transparent;
  border-radius:16px;
  transition:background .2s ease-out, transform .2s ease-out;
}

.dock-list a:hover,
.dock-list a:focus-visible{
  background:rgba(180,253,225,.9);
  border-color:rgba(23,38,32,.32);
  transform:translateY(-2px);
}

.dock-brand a{
  font-weight:700;
  letter-spacing:.05em;
  border:3px solid var(--edge);
  border-radius:18px;
  padding:0 16px;
  background:linear-gradient(160deg,var(--mint),var(--blue));
  box-shadow:inset -2px -2px 7px rgba(23,38,32,.18), 3px 3px 9px rgba(23,38,32,.2);
}

/* ---------- 动效 ---------- */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .62s ease-out, transform .62s cubic-bezier(.34,1.56,.64,1);
}

html.js [data-reveal].in{
  opacity:1;
  transform:none;
}

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

/* ---------- 断点 ---------- */
@media (max-width: 900px){
  .wrap{ grid-template-columns:minmax(0,1fr); }
  .side{ position:static; order:2; }
  .side-list{ flex-direction:row; flex-wrap:wrap; gap:6px; }
  .side-list a{ min-height:40px; }
  .foot-cols{ grid-template-columns:1fr 1fr; }
  .fcol-brand{ grid-column:1 / -1; }
}

@media (max-width: 700px){
  body{ font-size:16px; padding-bottom:calc(112px + env(safe-area-inset-bottom)); }
  .hero{
    grid-template-columns:minmax(0,1fr);
    min-height:0;
    gap:14px;
    padding:16px 14px 6px;
  }
  .hero-media{
    aspect-ratio:16 / 7;
    max-height:none;
    border-radius:22px;
  }
  .hero-copy h1{ font-size:clamp(1.55rem, 6.4vw, 2.1rem); }
  .hero-lead{ font-size:.96rem; }
  .wrap{ padding:12px 14px 22px; }
  .sheet{ padding:8px 15px 22px; border-radius:22px; }
  .prose > div{ scroll-margin-top:24px; scroll-margin-bottom:140px; }
  .foot{ padding:0 14px 22px; }
  .cta{ padding:24px 18px 26px; border-radius:24px; }
  .chip{ font-size:.9rem; }
}

@media (max-width: 420px){
  .foot-cols{ grid-template-columns:1fr; }
  .chips{ left:8px; right:8px; bottom:8px; }
}

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