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

:root{
  --mint:#b4fde1;
  --sky:#add8e6;
  --ink:#172620;
  --deep:#0c5340;
  --cream:#f7fffc;
  --line:3px solid var(--ink);
  --lift:0 14px 28px -18px rgba(23,38,32,.7);
  --inset:inset -3px -3px 9px rgba(23,38,32,.12), inset 3px 3px 9px rgba(255,255,255,.95);
}

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

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

body{
  margin:0;
  font-family:'Lato',"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  line-height:1.78;
  color:var(--ink);
  background:
    radial-gradient(900px 520px at 6% -8%, #eafff7 0%, rgba(234,255,247,0) 62%),
    radial-gradient(820px 460px at 96% 2%, #e4f4fb 0%, rgba(228,244,251,0) 58%),
    linear-gradient(185deg,#f4fffb 0%,#eaf6fb 46%,#f7fffc 100%);
  background-attachment:fixed;
  padding-bottom:100px;
  overflow-x:hidden;
}

h1,h2,h3,.dock-brand,.foot-mark{
  font-family:'EB Garamond',"Songti SC","Noto Serif SC",Georgia,serif;
  font-weight:700;
  letter-spacing:.01em;
  line-height:1.28;
  margin:0;
}

p{margin:0 0 1em}
img{max-width:100%}
ul{list-style:none;margin:0;padding:0}
address{font-style:normal}
a{color:inherit}
:focus-visible{outline:3px solid var(--deep);outline-offset:2px}

/* 底部固定条 */
.dock{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:60;
  display:flex;
  align-items:center;
  gap:12px;
  padding:10px 16px calc(10px + env(safe-area-inset-bottom,0px));
  background:linear-gradient(180deg,#ffffff 0%,#ebfff7 100%);
  border-top:4px solid var(--ink);
  box-shadow:0 -12px 26px -18px rgba(23,38,32,.75), inset 0 3px 0 #ffffff;
}

.dock-brand{
  display:inline-flex;
  align-items:center;
  min-height:46px;
  padding:0 10px;
  font-size:21px;
  text-decoration:none;
  border:var(--line);
  border-radius:14px;
  background:linear-gradient(160deg,var(--mint),#dcfff2);
  box-shadow:var(--inset), 3px 3px 0 rgba(23,38,32,.85);
  transition:transform .2s cubic-bezier(.34,1.56,.64,1);
}
.dock-brand:hover{transform:translateY(-2px)}

.dock-search{order:3}
.dock-search input{
  width:150px;
  min-height:46px;
  padding:0 16px;
  font:inherit;
  font-size:16px;
  color:var(--ink);
  border:var(--line);
  border-radius:999px;
  background:#ffffff;
  box-shadow:var(--inset), 3px 3px 0 rgba(23,38,32,.85);
}
.dock-search input::placeholder{color:#5c7a70}

.dock-nav{flex:1 1 auto;min-width:0}
.dock-nav ul{display:flex;gap:6px;overflow-x:auto;scrollbar-width:thin}
.dock-nav li{flex:0 0 auto}
.dock-nav a{
  display:inline-flex;
  align-items:center;
  min-height:46px;
  padding:0 13px;
  font-size:16px;
  font-weight:700;
  text-decoration:none;
  white-space:nowrap;
  border:3px solid transparent;
  border-radius:999px;
  transition:background .18s ease-out, border-color .18s ease-out, transform .2s cubic-bezier(.34,1.56,.64,1);
}
.dock-nav a:hover{border-color:var(--ink);background:var(--sky);transform:translateY(-2px)}
.dock-nav a:active{transform:translateY(1px)}
.dim{opacity:.32}

/* 主区 */
main{display:block}

.hero{
  max-width:1180px;
  margin:0 auto;
  padding:26px 20px 0;
  min-height:45vh;
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:26px;
  align-items:center;
}
.hero-copy h1{
  font-size:clamp(30px,4.4vw,58px);
  border-bottom:4px solid var(--ink);
  padding-bottom:.22em;
  text-wrap:balance;
}
.hero-art{
  position:relative;
  margin:0;
  min-height:230px;
  overflow:hidden;
  border:4px solid var(--ink);
  border-radius:26px 26px 26px 26px;
  background:linear-gradient(150deg,var(--mint),var(--sky));
  box-shadow:var(--inset), 12px 16px 30px -18px rgba(23,38,32,.85);
}
.hero-img{
  display:block;
  width:100%;
  height:100%;
  min-height:230px;
  object-fit:cover;
  clip-path:polygon(0 0,100% 0,100% 100%,0 84%);
}
.hero-art:not(:has(img))::after{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(circle at 30% 30%, #ffffff 0%, transparent 45%);
}
.hero-art figcaption{
  position:absolute;
  left:14px;
  top:14px;
  padding:3px 14px;
  font-size:16px;
  font-weight:700;
  border:3px solid var(--ink);
  border-radius:999px;
  background:#ffffff;
  box-shadow:2px 2px 0 rgba(23,38,32,.8);
}

.shell{
  max-width:1180px;
  margin:0 auto;
  padding:34px 20px 0;
  display:grid;
  grid-template-columns:238px minmax(0,1fr);
  gap:30px;
  align-items:start;
}
.body{min-width:0}

/* 左侧目录 */
.rail{
  position:sticky;
  top:18px;
  max-height:calc(100vh - 150px);
  overflow:auto;
  padding:18px 14px 16px;
  border:4px solid var(--ink);
  border-radius:22px;
  background:linear-gradient(170deg,#ffffff 0%,#e9fff7 100%);
  box-shadow:var(--inset), 8px 10px 0 rgba(23,38,32,.1);
}
small{
  display:inline-block;
  padding:1px 12px;
  font-family:'Lato',system-ui,sans-serif;
  font-size:16px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--deep);
  background:#ffffff;
  border:2px solid var(--ink);
  border-radius:999px;
}
small + h2,small + h3{margin-top:8px}
.rail-title{
  margin:8px 0 12px;
  font-size:23px;
}
.rail-list li + li{margin-top:5px}
.rail-list a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:4px 10px;
  font-size:16px;
  text-decoration:none;
  border-left:4px solid var(--mint);
  border-radius:0;
  transition:background .18s ease-out, border-color .18s ease-out, padding-left .18s ease-out;
}
.rail-list a:hover{background:var(--sky);border-left-color:var(--ink);padding-left:16px}

/* 正文 */
.doc > section{
  position:relative;
  margin:0 0 26px;
  padding:26px 24px 20px;
  border:var(--line);
  border-radius:0;
  background:linear-gradient(168deg,#ffffff 0%,#f2fffa 100%);
  box-shadow:var(--lift), var(--inset);
  scroll-margin-top:20px;
}
.doc > section:nth-of-type(even){background:linear-gradient(168deg,#fcfeff 0%,#e9f6fc 100%)}
.doc h2{margin:.1em 0 .7em;font-size:clamp(23px,2.6vw,32px)}
.doc h3{margin:1.3em 0 .5em;font-size:21px}
.doc p{max-width:70ch}
.doc ul,.doc ol{margin:0 0 1em;padding-left:1.35em;max-width:70ch}
.doc ul{list-style:disc}
.doc ol{list-style:decimal}
.doc li{margin-bottom:.4em}
.doc a{color:var(--deep);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:2px}
.doc a:hover{background:var(--mint)}
.doc img{border:var(--line);border-radius:18px;box-shadow:var(--lift);height:auto}
.doc figure{margin:0 0 1.2em}
.doc blockquote{
  margin:0 0 1.2em;
  padding:14px 18px;
  border:var(--line);
  border-left-width:10px;
  border-radius:16px;
  background:linear-gradient(160deg,#eafff7,#ffffff);
  box-shadow:var(--inset);
}
.doc blockquote p:last-child{margin-bottom:0}
.doc table{width:100%;border-collapse:collapse;margin:0 0 1.2em;font-size:16px}
.doc th,.doc td{border:2px solid var(--ink);padding:8px 10px;text-align:left}
.doc th{background:var(--mint)}

/* 页脚 */
.foot{
  max-width:1180px;
  margin:56px auto 0;
  padding:0 20px 34px;
}
.foot-main{
  display:grid;
  grid-template-columns:1.5fr 1fr;
  gap:26px;
  padding:26px;
  border:4px solid var(--ink);
  border-radius:24px;
  background:linear-gradient(160deg,#e6fff7 0%,#e2f3fb 100%);
  box-shadow:var(--inset), 10px 14px 0 rgba(23,38,32,.12);
}
.foot-mark{font-size:24px;margin-bottom:.4em}
.foot-mark a{text-decoration:none}
.foot-brand address{
  margin-bottom:16px;
  font-size:16px;
  line-height:1.7;
  color:#28453b;
}
.foot-form{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:10px}
.foot-form input{
  flex:1 1 150px;
  min-height:46px;
  padding:0 16px;
  font:inherit;
  font-size:16px;
  border:var(--line);
  border-radius:14px;
  background:#ffffff;
  box-shadow:var(--inset);
}
.foot-form button{
  min-height:46px;
  padding:0 22px;
  font:inherit;
  font-size:16px;
  font-weight:700;
  color:var(--ink);
  border:var(--line);
  border-radius:999px;
  background:linear-gradient(160deg,var(--mint),#8ef5d2);
  box-shadow:var(--inset), 3px 3px 0 rgba(23,38,32,.85);
  cursor:pointer;
  transition:transform .2s cubic-bezier(.34,1.56,.64,1);
}
.foot-form button:hover{transform:translateY(-2px)}
.foot-form button:active{transform:translateY(2px)}
.foot-note{display:block;font-size:16px;font-weight:700;color:var(--deep);min-height:22px}

.foot-links ul{display:grid;gap:2px}
.foot-links a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 6px;
  font-size:16px;
  text-decoration:none;
  border-bottom:2px solid transparent;
}
.foot-links a:hover{border-bottom-color:var(--ink);background:var(--sky)}

.foot-bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  margin-top:18px;
  padding-top:14px;
  border-top:3px dashed var(--ink);
}
.foot-copy{margin:0;font-size:16px}
.foot-mini{display:flex;gap:6px}
.foot-mini a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 14px;
  font-size:16px;
  text-decoration:none;
  border:3px solid var(--ink);
  border-radius:999px;
  background:#ffffff;
  box-shadow:2px 2px 0 rgba(23,38,32,.8);
}
.foot-mini a:hover{background:var(--mint)}
.foot-anchor{height:0;margin:0}

/* 动效 */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .5s ease-out, transform .55s cubic-bezier(.34,1.56,.64,1)}
.reveal.in{opacity:1;transform:none}

@media (max-width:900px){
  body{padding-bottom:156px}
  .dock{flex-wrap:wrap;gap:8px;padding:8px 12px calc(8px + env(safe-area-inset-bottom,0px))}
  .dock-brand{order:1;font-size:19px}
  .dock-search{order:2;margin-left:auto}
  .dock-search input{width:132px}
  .dock-nav{order:3;flex:1 0 100%}
  .hero{grid-template-columns:minmax(0,1fr);padding-top:18px;min-height:0;gap:18px}
  .hero-art{min-height:196px;border-radius:22px}
  .hero-img{min-height:196px;clip-path:polygon(0 0,100% 0,100% 100%,0 90%)}
  .shell{grid-template-columns:minmax(0,1fr);gap:18px;padding-top:22px}
  .rail{position:static;max-height:none;padding:14px 12px}
  .rail-list{display:flex;gap:8px;overflow-x:auto}
  .rail-list li{flex:0 0 auto}
  .rail-list li + li{margin-top:0}
  .rail-list a{white-space:nowrap;border-left:0;border:3px solid var(--ink);border-radius:999px;background:#ffffff;padding:0 14px}
  .rail-list a:hover{padding-left:14px}
  .doc > section{padding:22px 16px 16px}
  .foot-main{grid-template-columns:minmax(0,1fr);padding:20px}
  .foot-bar{flex-direction:column;align-items:flex-start}
}

@media (max-width:560px){
  .dock-search input{width:112px}
  .hero-copy h1{font-size:clamp(27px,8vw,36px)}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
}

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