@import url('https://fonts.googleapis.com/css2?family=Abril+Fatface&family=Merriweather:wght@300;400;700&display=swap');

:root{
  --mint:#b4fde1;
  --mint-deep:#7fe6c0;
  --sky:#add8e6;
  --ink:#172620;
  --clay:#f4fffb;
  --display:'Abril Fatface','Songti SC','Noto Serif SC',Georgia,'Times New Roman',serif;
  --body:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --r-lg:24px;
  --r-md:18px;
  --r-xs:4px;
  --lift:5px 5px 0 rgba(23,38,32,.16);
  --lift-sm:3px 3px 0 rgba(23,38,32,.16);
  --inner:inset -2px -3px 8px rgba(23,38,32,.10), inset 2px 3px 8px #ffffff;
  --line:3px solid rgba(23,38,32,.82);
}

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

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

body{
  margin:0;
  overflow-x:clip;
  font-family:var(--body);
  font-size:17px;
  line-height:1.75;
  color:var(--ink);
  background-color:#e6fbf3;
  background-image:
    radial-gradient(circle at 12% 8%, rgba(180,253,225,.95) 0, rgba(180,253,225,0) 46%),
    radial-gradient(circle at 88% 22%, rgba(173,216,230,.9) 0, rgba(173,216,230,0) 44%),
    radial-gradient(circle at 50% 100%, rgba(180,253,225,.7) 0, rgba(180,253,225,0) 58%),
    linear-gradient(165deg,#d8fff0 0%,#eefaff 48%,#cfe9f4 100%);
  background-attachment:fixed;
  padding-bottom:136px;
}

img{max-width:100%;display:block;}

a{color:var(--ink);}

h1,h2,h3{
  font-family:var(--display);
  font-weight:400;
  letter-spacing:.01em;
  line-height:1.2;
  margin:0 0 .5em;
}

small,.eyebrow{
  display:block;
  font-family:var(--body);
  font-size:16px;
  font-weight:700;
  letter-spacing:.16em;
  line-height:1.5;
  color:#3c5a4d;
  margin:0 0 .35em;
}

:focus-visible{
  outline:4px solid var(--mint-deep);
  outline-offset:3px;
}

/* ---------- 顶部：搜索 + 抽屉 ---------- */
.masthead{
  position:relative;
  z-index:40;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  max-width:1180px;
  margin:0 auto;
  padding:18px clamp(14px,4vw,32px) 4px;
}

.search{
  display:flex;
  align-items:center;
  gap:6px;
  flex:1 1 auto;
  max-width:330px;
  padding:4px 4px 4px 14px;
  border:var(--line);
  border-radius:999px;
  background:linear-gradient(180deg,#ffffff,#e7fff6);
  box-shadow:var(--lift-sm),var(--inner);
}

.search-in{
  flex:1 1 auto;
  min-width:0;
  min-height:40px;
  border:0;
  background:transparent;
  font:inherit;
  font-size:16px;
  color:var(--ink);
  padding:0;
}
.search-in:focus{outline:none;}
.search-in::placeholder{color:#5c7a6d;}

.search-go{
  flex:0 0 auto;
  min-height:40px;
  padding:0 16px;
  border:0;
  border-radius:999px;
  font:inherit;
  font-size:16px;
  font-weight:700;
  color:var(--ink);
  background:var(--mint-deep);
  cursor:pointer;
  transition:transform .2s cubic-bezier(.34,1.56,.64,1);
}
.search-go:active{transform:scale(.94);}

.burger{
  display:inline-flex;
  align-items:center;
  min-height:48px;
  padding:0 18px;
  list-style:none;
  font-size:16px;
  font-weight:700;
  letter-spacing:.1em;
  border:var(--line);
  border-radius:999px;
  background:linear-gradient(180deg,#ffffff,#d9fbef);
  box-shadow:var(--lift-sm),var(--inner);
  cursor:pointer;
  user-select:none;
}
.burger::-webkit-details-marker{display:none;}
.burger:active{transform:scale(.96);}

.sheet{
  display:none;
  list-style:none;
  margin:0;
  padding:clamp(24px,6vw,64px);
  position:fixed;
  inset:0;
  z-index:60;
  overflow-y:auto;
  background:rgba(23,38,32,.55);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  align-content:center;
  justify-items:center;
  gap:10px;
}
.drawer[open] .sheet{display:grid;}
.drawer[open] .burger{
  position:fixed;
  top:16px;
  right:16px;
  z-index:70;
  background:var(--mint);
}

.sheet li{width:min(420px,100%);}
.sheet a{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:52px;
  padding:10px 20px;
  text-decoration:none;
  font-size:18px;
  font-weight:700;
  border:var(--line);
  border-radius:var(--r-md);
  background:linear-gradient(180deg,#ffffff,#e6fff5);
  box-shadow:4px 4px 0 rgba(23,38,32,.28),var(--inner);
  transition:transform .2s cubic-bezier(.34,1.56,.64,1);
}
.sheet a:hover{transform:translateY(-2px);}
.sheet a:active{transform:translateY(2px);box-shadow:2px 2px 0 rgba(23,38,32,.28),var(--inner);}

/* ---------- 首屏 ---------- */
.hero{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);
  align-items:center;
  gap:clamp(20px,4vw,56px);
  min-height:100svh;
  max-width:1180px;
  margin:0 auto;
  padding:clamp(20px,4vw,48px) clamp(16px,4vw,32px) 40px;
}

.hero-art{
  position:relative;
  justify-self:start;
  width:100%;
  max-width:462px;
}

.blob{
  margin:0;
  width:100%;
  aspect-ratio:1/1;
  border-radius:44% 56% 52% 48% / 52% 46% 54% 48%;
  overflow:hidden;
  border:4px solid var(--ink);
  background:linear-gradient(160deg,var(--mint),var(--sky));
  box-shadow:10px 12px 0 rgba(23,38,32,.14),var(--inner);
  animation:breathe 9s ease-in-out infinite;
}

.blob-fill{
  width:100%;
  height:100%;
  background:radial-gradient(circle at 36% 30%,#ffffff 0%,var(--mint) 42%,var(--sky) 100%);
}

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

@keyframes breathe{
  0%,100%{border-radius:44% 56% 52% 48% / 52% 46% 54% 48%;}
  50%{border-radius:56% 44% 48% 52% / 46% 54% 48% 52%;}
}

.sticker{
  position:absolute;
  left:-10px;
  bottom:16%;
  transform:rotate(-7deg);
  padding:8px 16px;
  font-family:var(--display);
  font-size:18px;
  letter-spacing:.04em;
  color:var(--ink);
  background:#ffffff;
  border:3px solid var(--ink);
  border-radius:var(--r-md);
  box-shadow:var(--lift-sm);
}

.hero-copy{
  text-align:right;
  justify-self:end;
  max-width:560px;
}

.hero-h1{
  font-size:clamp(2rem,5.6vw,3.5rem);
  margin:0 0 .35em;
  text-wrap:balance;
  text-shadow:2px 3px 0 rgba(255,255,255,.9);
}

.hero-lede{
  margin:0 0 26px;
  font-size:18px;
  line-height:1.85;
  color:#274238;
}

.hero-acts{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:flex-end;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:48px;
  padding:0 24px;
  font-size:16px;
  font-weight:700;
  letter-spacing:.06em;
  text-decoration:none;
  border:var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--lift),var(--inner);
  transition:transform .2s cubic-bezier(.34,1.56,.64,1),box-shadow .2s ease-out;
}
.btn-solid{background:linear-gradient(180deg,#d6fff0,var(--mint-deep));}
.btn-ghost{background:linear-gradient(180deg,#ffffff,#dff2fa);}
.btn:hover{transform:translateY(-2px);}
.btn:active{transform:translateY(2px);box-shadow:2px 2px 0 rgba(23,38,32,.18),var(--inner);}

/* ---------- 正文骨架 ---------- */
.shell{
  display:grid;
  grid-template-columns:minmax(0,1fr) 296px;
  gap:clamp(18px,3vw,34px);
  align-items:start;
  max-width:1180px;
  margin:0 auto;
  padding:0 clamp(14px,4vw,32px);
}

.prose{min-width:0;}

.prose > section{
  padding:clamp(18px,3vw,32px);
  margin:0 0 22px;
  border:var(--line);
  border-radius:var(--r-lg);
  background:linear-gradient(180deg,rgba(255,255,255,.92),rgba(255,255,255,.62));
  box-shadow:var(--lift),var(--inner);
  scroll-margin-top:24px;
}
.prose > section:nth-of-type(even){
  background:linear-gradient(180deg,rgba(180,253,225,.8),rgba(173,216,230,.62));
}
.prose > section:last-child{margin-bottom:0;}

.prose h2{font-size:clamp(1.45rem,3.4vw,2.05rem);}
.prose h3{font-size:clamp(1.15rem,2.4vw,1.4rem);}
.prose p{margin:0 0 1em;}
.prose p:last-child{margin-bottom:0;}
.prose ul,.prose ol{margin:0 0 1em;padding-left:1.35em;}
.prose li{margin:0 0 .4em;}
.prose a{text-decoration-thickness:2px;text-underline-offset:3px;}
.prose img{border:3px solid var(--ink);border-radius:var(--r-md);box-shadow:var(--lift-sm);margin:0 0 1em;}
.prose blockquote{
  margin:0 0 1em;
  padding:12px 18px;
  border-left:6px solid var(--mint-deep);
  border-radius:0 var(--r-md) var(--r-md) 0;
  background:rgba(255,255,255,.72);
}
.prose table{
  width:100%;
  display:block;
  overflow-x:auto;
  border-collapse:collapse;
  font-size:16px;
  margin:0 0 1em;
}
.prose th,.prose td{
  border:2px solid rgba(23,38,32,.35);
  padding:8px 10px;
  text-align:right;
  white-space:nowrap;
}
.prose code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:15px;
  background:rgba(23,38,32,.08);
  border-radius:6px;
  padding:2px 6px;
}

/* ---------- 侧栏 ---------- */
.side{
  position:sticky;
  top:18px;
  padding:18px;
  border:var(--line);
  border-radius:var(--r-lg);
  background:rgba(255,255,255,.45);
  backdrop-filter:blur(9px);
  -webkit-backdrop-filter:blur(9px);
  box-shadow:var(--lift),var(--inner);
}

.side-h{font-size:1.2rem;margin:0 0 .6em;}

.side-list{
  list-style:none;
  margin:0 0 14px;
  padding:0;
  display:grid;
  gap:9px;
}

.side-list a{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  min-height:44px;
  padding:8px 12px;
  font-size:16px;
  font-weight:600;
  text-decoration:none;
  border:3px solid rgba(23,38,32,.7);
  border-radius:var(--r-xs);
  background:rgba(255,255,255,.62);
  box-shadow:var(--lift-sm);
  transition:transform .2s cubic-bezier(.34,1.56,.64,1),background .2s ease-out;
}
.side-list a:hover{transform:translate(-2px,-2px);background:#ffffff;}
.side-list a:active{transform:translate(1px,1px);box-shadow:1px 1px 0 rgba(23,38,32,.2);}

.totop{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  border:3px dashed rgba(23,38,32,.55);
  border-radius:var(--r-xs);
  font-size:16px;
  font-weight:700;
  text-decoration:none;
  background:rgba(180,253,225,.55);
}

/* ---------- 页脚 ---------- */
.foot{
  max-width:1180px;
  margin:34px auto 0;
  padding:26px clamp(14px,4vw,32px) 8px;
  border-top:4px solid rgba(23,38,32,.7);
}

.foot-top{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:22px;
  align-items:center;
}

.foot-h{font-size:clamp(1.3rem,3vw,1.8rem);margin:0;}

.sub{
  justify-self:end;
  width:100%;
  max-width:340px;
}
.sub label{font-size:16px;font-weight:700;letter-spacing:.14em;display:block;margin-bottom:6px;}
.sub-row{
  display:flex;
  gap:6px;
  padding:5px;
  border:var(--line);
  border-radius:var(--r-md);
  background:linear-gradient(180deg,#ffffff,#e6fff5);
  box-shadow:var(--lift-sm),var(--inner);
}
.sub-row input{
  flex:1 1 auto;
  min-width:0;
  min-height:40px;
  border:0;
  background:transparent;
  font:inherit;
  font-size:16px;
  padding:0 10px;
  color:var(--ink);
}
.sub-row input:focus{outline:none;}
.sub-row button{
  flex:0 0 auto;
  min-height:40px;
  padding:0 16px;
  border:0;
  border-radius:14px;
  font:inherit;
  font-size:16px;
  font-weight:700;
  background:var(--mint-deep);
  color:var(--ink);
  cursor:pointer;
}
.sub-row button:active{transform:scale(.95);}

.foot-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
  margin:26px 0 10px;
}
.foot-cols dl{margin:0;}
.foot-cols dt{
  font-size:16px;
  font-weight:700;
  letter-spacing:.16em;
  color:#3c5a4d;
  margin-bottom:6px;
}
.foot-cols dd{margin:0;}
.foot-cols a{
  display:flex;
  align-items:center;
  min-height:40px;
  font-size:16px;
  text-decoration:none;
  border-bottom:2px dotted rgba(23,38,32,.3);
}
.foot-cols a:hover{border-bottom-color:var(--ink);}

.copy{
  margin:12px 0 0;
  padding:12px 0;
  text-align:center;
  font-size:16px;
  border-top:2px dashed rgba(23,38,32,.3);
  color:#3c5a4d;
}

/* ---------- 底部固定条 ---------- */
.dock{
  position:fixed;
  left:50%;
  bottom:14px;
  transform:translateX(-50%);
  z-index:80;
  width:min(1000px,calc(100% - 28px));
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:8px;
  padding:9px 14px;
  border:4px solid var(--ink);
  border-radius:var(--r-lg);
  background:linear-gradient(180deg,#f4fffb,#c6f4e4);
  box-shadow:0 8px 0 rgba(23,38,32,.18),var(--inner);
}

.wing{
  display:flex;
  flex-wrap:wrap;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
  min-width:0;
}
.wing-l{justify-content:flex-end;}
.wing-r{justify-content:flex-start;}

.wing a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:0 9px;
  font-size:16px;
  font-weight:600;
  text-decoration:none;
  border-radius:12px;
  transition:background .18s ease-out,transform .18s ease-out;
}
.wing a:hover{background:rgba(255,255,255,.85);transform:translateY(-1px);}
.wing a:active{transform:translateY(1px);}

.brand{
  justify-self:center;
  font-family:var(--display);
  font-size:1.15rem;
  letter-spacing:.03em;
  text-decoration:none;
  padding:4px 14px;
  border-radius:999px;
  background:#ffffff;
  border:3px solid var(--ink);
  box-shadow:var(--lift-sm);
  white-space:nowrap;
}

/* ---------- 动效 ---------- */
.flash{box-shadow:0 0 0 6px var(--mint-deep),var(--lift),var(--inner) !important;}

@media (prefers-reduced-motion:no-preference){
  .js .reveal{
    opacity:0;
    transform:translateY(18px) scale(.985);
    transition:opacity .5s ease-out,transform .55s cubic-bezier(.34,1.56,.64,1);
  }
  .js .reveal.in{opacity:1;transform:none;}
  .blob{animation-duration:9s;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .blob{animation:none;}
  *{transition-duration:.01ms !important;}
}

/* ---------- 断点 ---------- */
@media (max-width:900px){
  .shell{grid-template-columns:minmax(0,1fr);}
  .side{position:static;order:2;}
  .side-list{grid-template-columns:repeat(2,minmax(0,1fr));}
  .side-list a, .totop{justify-content:center;}
}

@media (max-width:760px){
  body{font-size:17px;padding-bottom:186px;}
  .hero{
    grid-template-columns:minmax(0,1fr);
    min-height:0;
    padding:6px 16px 26px;
    gap:20px;
  }
  .hero-copy{order:1;max-width:none;justify-self:stretch;}
  .hero-art{order:2;max-width:320px;justify-self:center;}
  .hero-h1{font-size:clamp(1.8rem,8vw,2.4rem);}
  .hero-lede{font-size:17px;margin-bottom:18px;}
  .sticker{font-size:16px;padding:6px 12px;left:-6px;}
  .masthead{padding:12px 12px 2px;}
  .search{max-width:none;}
  .dock{
    width:calc(100% - 16px);
    bottom:8px;
    grid-template-columns:minmax(0,1fr);
    padding:8px 10px 10px;
    border-width:3px;
    gap:4px;
  }
  .brand{order:-1;justify-self:center;font-size:1.05rem;margin-bottom:2px;}
  .wing{justify-content:center;}
  .wing a{padding:0 7px;}
  .foot-cols{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;}
  .foot-top{grid-template-columns:minmax(0,1fr);}
  .sub{justify-self:stretch;max-width:none;}
  .side-list{grid-template-columns:minmax(0,1fr);}
}

@media (max-width:420px){
  .foot-cols{grid-template-columns:minmax(0,1fr) minmax(0,1fr);}
}

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