:root{
  --mist:#8A9BA8; --wood:#C4A882; --pine:#2D4A3E; --orange:#E08D4C;
  --ink:#1A1A1A; --snow:#F7F5F0; --paper:#F4F2ED; --line:#d9d3c8;
  --serif:"Iowan Old Style","Palatino Linotype",Georgia,"Times New Roman",serif;
  --head:"Rockwell","Roboto Slab",Georgia,"Times New Roman",serif;
  --sans:"Helvetica Neue",Arial,system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
body{margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--serif);font-weight:400;line-height:1.8;
  -webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 5vw}

/* ---------- 进度条 ---------- */
.progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:60;
  background:var(--orange);transition:width .1s linear}

/* ---------- 顶栏 ---------- */
.top{position:sticky;top:0;z-index:50;background:var(--pine);color:var(--snow)}
.top__in{display:flex;align-items:center;justify-content:space-between;
  padding:14px 5vw}
.brand{font-family:var(--head);font-weight:700;letter-spacing:.12em;
  font-size:20px;color:var(--snow);display:flex;align-items:center;gap:10px}
.brand .mk{display:inline-block;width:14px;height:14px;
  background:linear-gradient(135deg,var(--pine) 0 50%,var(--orange) 50% 100%);
  clip-path:polygon(50% 0,100% 100%,0 100%);transform:rotate(0)}
.top__nav{display:flex;gap:22px;font-family:var(--sans);font-size:12px;
  letter-spacing:.08em;text-transform:uppercase}
.top__nav a{opacity:.82;transition:opacity .2s}
.top__nav a:hover{opacity:1;color:var(--orange)}

/* ---------- Hero ---------- */
.hero{position:relative;height:78vh;min-height:520px;overflow:hidden;
  display:flex;align-items:flex-end}
.hero__img{position:absolute;inset:0;background-size:cover;background-position:center;
  animation:heroZoom 3s ease-out both}
@keyframes heroZoom{from{transform:scale(1.05)}to{transform:scale(1)}}
.hero__veil{position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(138,155,168,.55) 0%,rgba(138,155,168,.15) 35%,rgba(26,26,26,.55) 100%)}
.hero__cap{position:relative;z-index:2;color:var(--snow);padding:0 5vw 7vh;
  width:100%;animation:capUp 1.1s ease-out both}
@keyframes capUp{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}
.ridge{display:block;width:min(560px,80vw);height:26px;margin-bottom:18px;opacity:.95}
.hero__cap h1{font-family:var(--head);font-weight:700;letter-spacing:.04em;
  font-size:clamp(40px,8vw,82px);margin:0;line-height:1.02}
.hero__cap p{font-family:var(--serif);font-style:italic;font-size:clamp(16px,2.4vw,22px);
  margin:14px 0 0;opacity:.92}
.catnav{position:absolute;top:18px;left:5vw;z-index:3}
.catnav select{font-family:var(--sans);font-size:12px;letter-spacing:.06em;
  text-transform:uppercase;background:rgba(247,245,240,.9);color:var(--pine);
  border:1px solid var(--pine);border-radius:2px;padding:8px 12px;cursor:pointer}

/* ---------- 章节牌（分类） ---------- */
.chapters{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;
  padding:34px 5vw 8px}
.chap{position:relative;background:var(--wood);color:var(--pine);
  padding:26px 22px;border-radius:3px;cursor:pointer;overflow:hidden;
  transition:transform .25s ease,box-shadow .25s ease;min-height:104px;
  display:flex;flex-direction:column;justify-content:space-between}
.chap:hover{transform:translateY(-6px);box-shadow:0 12px 26px rgba(45,74,62,.22)}
.chap .n{font-family:var(--sans);font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;opacity:.7}
.chap .t{font-family:var(--head);font-weight:700;font-size:21px;margin-top:8px}
.chap .ar{position:absolute;right:16px;bottom:14px;font-size:20px;color:var(--orange);
  transition:transform .25s}
.chap:hover .ar{transform:translateX(6px)}

/* ---------- 文章网格（书脊） ---------- */
.streamhead{display:flex;align-items:center;gap:14px;padding:8px 5vw 0}
.streamhead .dot{width:34px;height:4px;background:var(--orange);border-radius:2px}
.streamhead h2{font-family:var(--head);font-weight:700;font-size:22px;
  letter-spacing:.03em;margin:0;color:var(--pine)}
.filterbar{display:flex;gap:8px;flex-wrap:wrap;padding:14px 5vw 0}
.pill{font-family:var(--sans);font-size:12px;letter-spacing:.05em;
  text-transform:uppercase;padding:7px 14px;border:1px solid var(--line);
  border-radius:30px;color:var(--pine);background:#fff;cursor:pointer;transition:.2s}
.pill:hover{border-color:var(--pine)}
.pill.on{background:var(--pine);color:var(--snow);border-color:var(--pine)}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:0;padding:18px 5vw 40px}
.acard{display:flex;gap:0;border-bottom:1px solid var(--line);padding:22px 0;
  cursor:pointer;transition:transform .25s ease,box-shadow .25s ease;
  animation:cardIn .5s ease-out both}
@keyframes cardIn{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
.acard:hover{transform:translateY(-4px)}
.acard .thumb{flex:0 0 64%;aspect-ratio:16/10;background-size:cover;background-position:center;
  border-radius:2px}
.acard .meta{padding:6px 0 6px 22px;display:flex;flex-direction:column;justify-content:center}
.acard .cat{display:inline-flex;align-items:center;gap:7px;font-family:var(--sans);
  font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--orange);margin-bottom:8px}
.acard .cat::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--orange)}
.acard h3{font-family:var(--head);font-weight:700;font-size:20px;line-height:1.22;margin:0;color:var(--pine)}
.acard .ex{font-size:14.5px;line-height:1.6;color:#4a443c;margin:9px 0 0}
.acard .rt{font-family:var(--sans);font-size:11px;letter-spacing:.06em;
  text-transform:uppercase;color:#8a8175;margin-top:10px}

/* ---------- 页脚 ---------- */
.foot{margin-top:30px;background:var(--pine);color:var(--snow)}
.foot__in{max-width:1180px;margin:0 auto;padding:40px 5vw;text-align:center}
.foot__in .big{font-family:var(--head);font-weight:700;letter-spacing:.1em;
  font-size:24px;margin-bottom:16px}
.foot__links{display:flex;justify-content:center;gap:26px;flex-wrap:wrap;
  font-family:var(--sans);font-size:12px;letter-spacing:.08em;text-transform:uppercase}
.foot__links a:hover{color:var(--orange)}
.foot__sub{margin-top:18px;font-family:var(--sans);font-size:12px;opacity:.7;letter-spacing:.04em}
.social{display:flex;justify-content:center;gap:18px;margin:16px 0 4px}
.social a{width:30px;height:30px;display:grid;place-items:center;border:1px solid rgba(247,245,240,.4);
  border-radius:50%;transition:.2s}
.social a:hover{border-color:var(--orange);color:var(--orange)}
.social svg{width:15px;height:15px;fill:currentColor}

/* ===================== 详情页 ===================== */
.det{display:grid;grid-template-columns:1fr 300px;gap:54px;
  max-width:1180px;margin:0 auto;padding:40px 5vw 70px;align-items:start}
.det__main{min-width:0}
.det h1{font-family:var(--head);font-weight:700;color:var(--pine);
  font-size:clamp(30px,4.6vw,52px);line-height:1.08;letter-spacing:.01em;margin:6px 0 0}
.det__meta{display:flex;gap:18px;flex-wrap:wrap;font-family:var(--sans);
  font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:#8a8175;
  border-bottom:1px solid var(--line);padding:14px 0 18px;margin-bottom:8px}
.det__meta .cat{color:var(--orange)}
.herofig{margin:18px 0 26px}
.herofig img{width:100%;border-radius:3px;border:1px solid var(--line)}
.herofig figcaption{font-family:var(--sans);font-size:12px;color:#8a8175;margin-top:8px}
.det__body{max-width:720px}
.det__body p{margin:0 0 1.15em;font-size:17px;line-height:1.85}
.det__body p.lead::first-letter{float:left;font-family:var(--head);font-weight:700;
  font-size:4em;line-height:.82;padding:6px 12px 0 0;color:var(--pine)}
.det__body p.cap{font-style:italic;color:#8a8175;font-size:14px}
.bleed{margin:26px 0;width:100%}
.bleed img{width:100%;border:1px solid var(--line);border-radius:3px}
.bleed figcaption{font-family:var(--sans);font-size:12px;color:#8a8175;margin-top:8px}
.det__side{position:sticky;top:80px;min-width:0}
.side__blk{margin-bottom:26px}
.side__blk h4{font-family:var(--sans);font-size:12px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--pine);margin:0 0 12px;
  border-left:4px solid var(--orange);padding-left:10px}
.side__card{display:flex;gap:12px;align-items:center;margin-bottom:12px;cursor:pointer}
.side__card .t{width:64px;height:48px;flex:0 0 64px;background-size:cover;background-position:center;
  border-radius:2px}
.side__card .ti{font-family:var(--head);font-size:14px;line-height:1.25;color:var(--pine)}
.side__pick{display:block;border:1px solid var(--orange);border-radius:3px;padding:12px;cursor:pointer;margin-bottom:16px}
.side__pick .ti{font-family:var(--head);font-size:15px;color:var(--pine);line-height:1.3}
.sub{background:var(--wood);border-radius:3px;padding:16px}
.sub p{font-family:var(--sans);font-size:12px;letter-spacing:.04em;text-transform:uppercase;margin:0 0 10px;color:var(--pine)}
.sub input{width:100%;padding:10px;border:1px solid var(--pine);border-radius:2px;
  font-family:var(--sans);font-size:13px;background:#fff}
.sub button{margin-top:8px;width:100%;padding:10px;border:0;background:var(--pine);
  color:var(--snow);font-family:var(--sans);font-size:12px;letter-spacing:.1em;
  text-transform:uppercase;cursor:pointer;border-radius:2px}
.sub button:hover{background:var(--orange)}
.sub .note{font-family:var(--sans);font-size:11px;color:#6b6457;margin:8px 0 0;text-transform:none;letter-spacing:0}
.det__back{font-family:var(--sans);font-size:12px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--orange)}

/* ===================== 三件套 ===================== */
.static{max-width:720px;margin:0 auto;padding:120px 5vw 80px}
.static h1{font-family:var(--head);font-weight:700;color:var(--pine);
  font-size:clamp(30px,5vw,46px);margin:0 0 6px;letter-spacing:.02em}
.static .sub2{font-style:italic;color:#8a8175;margin:0 0 30px;font-size:17px}
.static h2{font-family:var(--head);font-size:22px;color:var(--pine);margin:30px 0 8px}
.static p{font-size:16px;line-height:1.85}
.static a.mail{color:var(--orange)}

/* ===================== 动效 ===================== */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ===================== 响应式 ===================== */
@media(max-width:900px){
  .det{grid-template-columns:1fr;gap:30px}
  .det__side{position:static}
  .chapters{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:600px){
  html,body{overflow-x:hidden;width:100%}
  .hero{height:66vh;min-height:420px}
  .top__in{flex-wrap:wrap;gap:10px}
  .top__nav{gap:16px;font-size:10px}
  .chapters{grid-template-columns:1fr 1fr;gap:10px;padding:24px 6vw 4px}
  .chap .t{font-size:18px}
  .grid{grid-template-columns:1fr;padding:14px 6vw 30px}
  .acard{flex-direction:column;gap:12px}
  .acard .thumb{flex:none;width:100%;aspect-ratio:16/9}
  .acard .meta{padding-left:0;padding-top:2px}
  .acard h3{font-size:18px}
  .wrap{padding:0 6vw}
  .det{padding:30px 6vw 60px}
  .det__body p{font-size:16px}
  .static{padding:96px 6vw 60px}
}