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

:root{
  --ink:#1f1f1f;
  --paper:#ffffff;
  --wash:#f5f5f5;
  --line:#e9e9e9;
  --soft:#6d6d6d;
  --sh1:0 1px 2px rgba(31,31,31,.05);
  --sh2:0 2px 6px rgba(31,31,31,.06),0 8px 18px rgba(31,31,31,.06);
  --sh3:0 8px 18px rgba(31,31,31,.08),0 20px 44px rgba(31,31,31,.09);
  --sh4:0 16px 36px rgba(31,31,31,.12),0 44px 88px rgba(31,31,31,.12);
  --ff-sans:"Noto Sans TC","PingFang TC","Microsoft JhengHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --ff-serif:"Noto Serif TC","Songti TC","PingFang TC",Georgia,serif;
}

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

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

body{
  margin:0;
  overflow-x:clip;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--ff-sans);
  font-size:17px;
  line-height:1.78;
  letter-spacing:.012em;
}

img{display:block;max-width:100%;height:auto;}
a{color:inherit;}
h1,h2,h3,h4{font-family:var(--ff-serif);font-weight:600;line-height:1.42;letter-spacing:.012em;}
p{margin:0 0 1em;}

/* ===== 顶部两行：品牌行 + 菜单行，整体为 aside > nav ===== */
.topbar{
  position:sticky;
  top:0;
  z-index:40;
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:10px max(16px,calc((100% - 1180px) / 2)) 10px;
  background:rgba(255,255,255,.9);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  box-shadow:var(--sh2);
}

.brand{
  align-self:flex-start;
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:2px;
  text-decoration:none;
  font-family:var(--ff-serif);
  font-size:20px;
  font-weight:600;
  letter-spacing:.06em;
}

.mark{
  flex:0 0 auto;
  width:26px;
  height:26px;
  border-radius:4px;
  background:var(--ink);
  box-shadow:var(--sh2);
}
.mark-fallback{position:relative;}
.mark-fallback::after{
  content:"";
  position:absolute;
  inset:9px;
  background:#fff;
  border-radius:1px;
}

.menu-ul{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:6px;
}
.menu-ul li{
  animation:pop .5s cubic-bezier(.2,.7,.3,1) both;
  animation-delay:calc(var(--i,0) * 45ms);
}

.nav-a{
  display:inline-flex;
  align-items:center;
  gap:7px;
  min-height:44px;
  padding:8px 13px;
  border-radius:4px;
  background:var(--wash);
  color:#3b3b3b;
  font-size:16px;
  text-decoration:none;
  transition:background .25s ease,color .25s ease,box-shadow .25s ease,transform .25s ease;
}
.nav-a:hover,.nav-a:focus-visible{
  background:var(--ink);
  color:#fff;
  box-shadow:var(--sh3);
  transform:translateY(-1px);
}
.di{
  width:5px;
  height:5px;
  border-radius:1px;
  background:currentColor;
  opacity:.55;
  flex:0 0 auto;
}

@keyframes pop{
  from{opacity:0;transform:translateY(8px);}
  to{opacity:1;transform:none;}
}

/* ===== 首屏：叠层小插画 + 超大背景字 ===== */
.hero{
  position:relative;
  z-index:1;
  overflow:hidden;
  min-height:45vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:34px 20px 52px;
  background:linear-gradient(180deg,#ffffff 0%,#f8f8f8 60%,#f5f5f5 100%);
}
.hero.slim{min-height:auto;padding:26px 20px 34px;}

.hero-water{
  position:absolute;
  right:-6%;
  top:52%;
  transform:translateY(-50%);
  z-index:0;
  font-family:var(--ff-serif);
  font-weight:700;
  font-size:clamp(78px,18vw,200px);
  line-height:1;
  letter-spacing:.12em;
  color:var(--ink);
  opacity:.055;
  white-space:nowrap;
  pointer-events:none;
  will-change:transform;
}

.hero-in{
  position:relative;
  z-index:2;
  width:100%;
  max-width:780px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:22px;
}

.hero-art{
  flex:0 0 auto;
  width:92px;
  height:92px;
  display:grid;
  place-items:center;
  background:#fff;
  border-radius:4px;
  box-shadow:var(--sh4);
  position:relative;
  z-index:3;
  transform:rotate(-2deg);
}
.hero-img{width:92px;height:92px;object-fit:cover;border-radius:4px;}
.art-chip{
  position:relative;
  width:42px;
  height:42px;
  border:2px solid var(--ink);
  border-radius:50%;
}
.art-chip::after{
  content:"";
  position:absolute;
  left:12px;
  top:14px;
  width:15px;
  height:2px;
  background:var(--ink);
  transform:rotate(45deg);
  transform-origin:left center;
}

.hero-txt{text-align:center;min-width:0;}
.hero h1{
  margin:0 0 12px;
  font-size:clamp(26px,5vw,44px);
  letter-spacing:-.004em;
}
.hero-lead{
  margin:0 auto;
  max-width:38ch;
  color:var(--soft);
  font-size:16px;
  line-height:1.8;
}
.hero time{
  display:inline-block;
  margin:0 0 10px;
  padding:2px 10px;
  border-radius:4px;
  background:#fff;
  box-shadow:var(--sh1);
  color:var(--soft);
  font-size:16px;
  letter-spacing:.04em;
}

/* ===== 主栅格：main > .wrap > article > div + 右侧 aside ===== */
main{padding:0 12px 60px;}

.wrap{
  max-width:1180px;
  margin:0 auto;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:20px;
  padding:20px 12px;
  background:var(--wash);
  border-radius:4px;
}

.content{min-width:0;}

/* ===== 正文卡片堆叠：纵深与浮起 ===== */
.prose{
  display:flex;
  flex-direction:column;
  gap:16px;
  margin:0;
}
.prose > article{
  position:relative;
  z-index:1;
  background:#fff;
  border-radius:4px;
  box-shadow:var(--sh1);
  padding:24px 18px 20px;
  scroll-margin-top:152px;
  overflow-wrap:anywhere;
  transition:box-shadow .4s ease,transform .4s ease;
}
.prose > article:nth-child(2n){z-index:2;box-shadow:var(--sh2);}
.prose > article:nth-child(3n){z-index:3;}
.prose > article:hover{
  z-index:4;
  box-shadow:var(--sh4);
  transform:translateY(-3px);
}

.prose h2{margin:0 0 6px;font-size:clamp(21px,2.5vw,27px);}
.prose h3{margin:1.4em 0 .5em;font-size:19px;}

.prose hr{
  width:54px;
  height:2px;
  border:0;
  margin:14px 0 18px;
  background:var(--ink);
  border-radius:2px;
  opacity:.85;
}
.prose h2 + hr,.prose h3 + hr{margin-top:2px;}

.prose p,.prose li{color:#2b2b2b;}
.prose ul,.prose ol{padding-left:1.25em;margin:0 0 1em;}
.prose li{margin:.3em 0;}
.prose blockquote{
  margin:1.2em 0;
  padding:14px 16px;
  background:var(--wash);
  border-radius:4px;
  box-shadow:var(--sh1);
  color:#3a3a3a;
}
.prose time{
  display:inline-block;
  margin:0 0 6px;
  padding:2px 9px;
  border-radius:4px;
  background:var(--wash);
  color:var(--soft);
  font-size:16px;
}
.prose img{border-radius:4px;box-shadow:var(--sh2);margin:1em 0;}
.prose table{width:100%;border-collapse:collapse;font-size:16px;}
.prose th,.prose td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left;}

/* ===== 右侧栏 ===== */
.rail{
  position:relative;
  z-index:3;
  background:#fff;
  border-radius:4px;
  box-shadow:var(--sh3);
  padding:20px 16px;
  align-self:start;
}
.rail h2{margin:0;font-size:19px;letter-spacing:.05em;}
.rail hr{
  width:42px;
  height:2px;
  border:0;
  margin:10px 0 12px;
  background:var(--ink);
  border-radius:2px;
  opacity:.85;
}
.rail-ul{list-style:none;margin:0;padding:0;}
.rail-ul li + li{border-top:1px solid #f1f1f1;}
.rail-ul a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:6px 2px;
  font-size:16px;
  color:#3b3b3b;
  text-decoration:none;
  transition:color .2s ease,padding-left .2s ease;
}
.rail-ul a:hover,.rail-ul a:focus-visible{color:var(--ink);padding-left:6px;}

/* ===== 页脚：三列 dl + 表单 + 底栏 ===== */
.foot{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:24px;
  background:var(--ink);
  color:#ededed;
  padding:44px max(18px,calc((100% - 1180px) / 2)) 24px;
  box-shadow:0 -14px 36px rgba(31,31,31,.12);
}
.foot dl{margin:0;}
.foot dt{
  margin-bottom:8px;
  font-family:var(--ff-serif);
  font-size:17px;
  font-weight:600;
  letter-spacing:.06em;
  color:#fff;
}
.foot dd{
  margin:0;
  color:#c3c3c3;
  font-size:16px;
  line-height:1.75;
}
.foot dd a{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:2px 0;
  color:#c3c3c3;
  font-size:16px;
  text-decoration:none;
  transition:color .2s ease,transform .2s ease;
}
.foot dd a:hover,.foot dd a:focus-visible{color:#fff;transform:translateX(3px);}

.f-form{
  grid-column:1 / -1;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.14);
}
.sub{display:flex;flex-wrap:wrap;gap:10px;}
.sub-in{
  flex:1 1 210px;
  min-height:46px;
  padding:0 14px;
  font-family:var(--ff-sans);
  font-size:16px;
  color:#fff;
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.22);
  border-radius:4px;
}
.sub-in::placeholder{color:#9d9d9d;}
.sub-in:focus{outline:2px solid #fff;outline-offset:1px;}
.sub-btn{
  min-height:46px;
  padding:0 26px;
  font-family:var(--ff-sans);
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  background:#fff;
  border:0;
  border-radius:4px;
  cursor:pointer;
  box-shadow:var(--sh2);
  transition:transform .2s ease,box-shadow .2s ease;
}
.sub-btn:hover{transform:translateY(-1px);box-shadow:var(--sh3);}

.f-bottom{
  grid-column:1 / -1;
  text-align:center;
  color:#9d9d9d;
  font-size:16px;
  letter-spacing:.06em;
  border-top:1px solid rgba(255,255,255,.12);
  padding-top:16px;
}
.f-bottom p{margin:0;}

/* ===== 回到顶部 ===== */
.to-top{
  position:fixed;
  right:16px;
  bottom:16px;
  z-index:60;
  min-height:46px;
  padding:0 18px;
  font-family:var(--ff-sans);
  font-size:16px;
  color:#fff;
  background:var(--ink);
  border:0;
  border-radius:4px;
  box-shadow:var(--sh4);
  cursor:pointer;
  opacity:0;
  pointer-events:none;
  transform:translateY(12px);
  transition:opacity .3s ease,transform .3s ease;
}
.to-top.on{opacity:1;pointer-events:auto;transform:none;}

/* ===== 滚动显现 ===== */
.rv-ready [data-rv]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .62s ease,transform .62s cubic-bezier(.2,.7,.3,1);
}
.rv-ready [data-rv].in{opacity:1;transform:none;}

/* ===== 断点 ===== */
@media (min-width:900px){
  .topbar{padding-top:12px;}
  main{padding:0 20px 76px;}
  .wrap{
    grid-template-columns:minmax(0,1fr) 296px;
    gap:28px;
    padding:30px 26px 34px;
  }
  .prose > article{padding:30px 28px 24px;}
  .rail{position:sticky;top:150px;margin-top:-52px;padding:22px 18px;}
  .foot{grid-template-columns:1.5fr 1fr 1fr;gap:32px;padding-top:52px;}
  .hero{padding:48px 24px 68px;}
}

@media (max-width:420px){
  .brand{font-size:18px;}
  .nav-a{padding:8px 11px;}
  .hero-art{width:76px;height:76px;}
  .art-chip{width:34px;height:34px;}
  .art-chip::after{left:9px;top:12px;width:12px;}
  .prose > article{padding:20px 15px 16px;scroll-margin-top:170px;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-delay:0ms !important;
    transition-duration:.001ms !important;
  }
  .rv-ready [data-rv]{opacity:1;transform:none;}
}

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