:root{--wood:#1A1410;--gold:#C9A96E;--parch:#F5F0E8;--ink:#2a2118;--mut:#9b8c74;
  --serif:'Playfair Display',Georgia,serif;--sans:'Inter',system-ui,sans-serif}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--parch);color:var(--ink);font-family:var(--sans);line-height:1.65;
  -webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}

.topbar{position:fixed;top:0;left:0;right:0;z-index:60;height:56px;display:flex;
  align-items:center;justify-content:space-between;padding:0 5vw;
  background:rgba(245,240,232,.8);backdrop-filter:blur(16px);border-bottom:1px solid rgba(26,20,16,.14)}
.brand{font-family:var(--serif);font-weight:800;font-size:17px;color:var(--wood);letter-spacing:.04em}
.brand b{color:var(--gold)}
.topnav{display:flex;gap:24px;font-size:12px;letter-spacing:.2em;text-transform:uppercase}
.topnav a{color:var(--ink);opacity:.7;transition:.3s}.topnav a:hover{opacity:1;color:var(--gold)}

.hero{padding:120px 5vw 60px}
.hero .kicker{font-size:11px;letter-spacing:.3em;text-transform:uppercase;color:var(--gold)}
.hero h1{font-family:var(--serif);font-weight:800;font-size:clamp(34px,5.6vw,74px);color:var(--wood);
  line-height:1.02;margin-top:14px}
.hero p{margin-top:16px;max-width:48ch;color:#6a5c47}

/* 镇馆之宝 3 列非对称 */
.vault{display:grid;grid-template-columns:1.5fr 1fr 1fr;grid-template-rows:repeat(2,210px);
  gap:18px;padding:0 5vw 60px}
.vault a{position:relative;overflow:hidden;display:block}
.vault a:nth-child(1){grid-column:1;grid-row:1/3}
.vault a .ph{position:absolute;inset:0;background-size:cover;background-position:center;transition:.6s}
.vault a:hover .ph{transform:scale(1.07)}
.vault a .ov{position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(26,20,16,.85))}
.vault a .cap{position:absolute;left:0;right:0;bottom:0;padding:20px;color:var(--parch)}
.vault a .cap .cat{font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--gold)}
.vault a .cap .tt{font-family:var(--serif);font-weight:600;font-size:18px;line-height:1.16;margin-top:7px}
.vault a:nth-child(1) .cap .tt{font-size:28px}

.sec{padding:80px 5vw}
.sec__hd{display:flex;align-items:baseline;gap:16px;margin-bottom:40px}
.sec__hd h2{font-family:var(--serif);font-weight:600;font-size:clamp(24px,3.6vw,42px);color:var(--wood)}
.sec__hd span{font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--mut)}
.rule{height:1px;background:rgba(26,20,16,.16);flex:1}

/* 纪年墙 竖向时间轴 */
.wall{display:grid;grid-template-columns:120px 1fr;gap:0;max-width:900px}
.wall .yr{font-family:var(--serif);font-size:30px;color:var(--gold);border-right:2px solid var(--gold);
  padding:10px 18px 10px 0;text-align:right}
.wall .ev{padding:14px 0 14px 26px;border-left:2px solid rgba(26,20,16,.2);position:relative}
.wall .ev:before{content:"";position:absolute;left:-7px;top:24px;width:12px;height:12px;border-radius:50%;
  background:var(--gold)}
.wall .ev a{display:block;font-family:var(--serif);font-size:18px;color:var(--wood)}
.wall .ev a:hover{color:var(--gold)}
.wall .ev .m{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--mut);margin-top:4px}

/* 书架网格 */
.shelf{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
.book{position:relative;overflow:hidden;display:block;background:var(--wood);
  border:1px solid rgba(26,20,16,.2);transition:.35s}
.book:hover{transform:translateY(-5px);box-shadow:0 20px 44px rgba(26,20,16,.2)}
.book .ph{height:100%;min-height:200px;background-size:cover;background-position:center;opacity:.92}
.book .cap{position:absolute;left:0;right:0;bottom:0;padding:16px;color:var(--parch);
  background:linear-gradient(180deg,transparent,rgba(26,20,16,.92))}
.book .cap .cat{font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--gold)}
.book .cap .tt{font-family:var(--serif);font-weight:600;font-size:16px;line-height:1.18;margin-top:6px}
.book.s2{grid-column:span 2}.book.s3{grid-column:span 3}.book.s6{grid-column:span 6}
.book.tall{grid-row:span 2}

/* 读者引言墙 */
.quotes{background:var(--wood);color:var(--parch);padding:90px 5vw}
.quotes .qwrap{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.quotes q{font-family:var(--serif);font-style:italic;font-size:22px;line-height:1.4;display:block}
.quotes .by{margin-top:16px;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--gold)}

.foot{background:var(--wood);color:rgba(245,240,232,.7);padding:50px 5vw;display:flex;
  justify-content:space-between;flex-wrap:wrap;gap:14px;border-top:1px solid rgba(201,169,110,.3)}
.foot .brand{color:#fff}.foot .social{display:flex;gap:18px;font-size:12px;letter-spacing:.18em;text-transform:uppercase}
.foot .social a:hover{color:var(--gold)}

.detail{max-width:1120px;margin:0 auto;padding:120px 5vw 100px}
.dback{position:fixed;top:16px;left:5vw;z-index:60;border:1px solid var(--wood);background:var(--parch);
  padding:9px 15px;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--wood);transition:.3s}
.dback:hover{background:var(--wood);color:var(--parch)}
.dgrid{display:grid;grid-template-columns:42% 58%}
.dleft{position:sticky;top:84px;align-self:start}
.dleft img{width:100%;border:1px solid rgba(26,20,16,.25)}
.dleft .cap{margin-top:14px;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--gold)}
.dright{padding-left:52px}
.dright h1{font-family:var(--serif);font-weight:800;font-size:clamp(30px,4.6vw,56px);line-height:1.04;color:var(--wood)}
.dbody{margin-top:28px;font-size:17px;line-height:1.95;color:var(--ink)}
.dbody p:first-of-type::first-letter{font-family:var(--serif);font-size:64px;float:left;line-height:.8;
  padding:6px 12px 0 0;color:var(--gold)}
.dbody p{margin-bottom:22px}
.dbody blockquote{margin:32px 0;padding-left:22px;border-left:3px solid var(--gold);
  font-family:var(--serif);font-style:italic;font-size:22px;color:var(--wood)}
.dfoot{margin-top:60px;border-top:1px solid rgba(26,20,16,.18);padding-top:20px;
  display:flex;justify-content:space-between;font-size:12px;letter-spacing:.14em;text-transform:uppercase}
.dfoot a:hover{color:var(--gold)}
@media(max-width:920px){.vault{grid-template-columns:1fr 1fr;grid-template-rows:none}
  .vault a{grid-column:auto!important;grid-row:auto!important;height:220px}
  .shelf{grid-template-columns:repeat(2,1fr)}.book.s3,.book.s6{grid-column:span 2}
  .quotes .qwrap{grid-template-columns:1fr}.dgrid{grid-template-columns:1fr}
  .dleft{position:static}.dright{padding-left:0;margin-top:24px}.topnav{display:none}}
@media(max-width:560px){.vault{grid-template-columns:1fr}.shelf{grid-template-columns:1fr}
  .book.s2,.book.s3,.book.s6{grid-column:span 1}.sec{padding:60px 5vw}
  .topbar{height:auto;padding:14px 5vw}.wall{grid-template-columns:80px 1fr}
  .foot{flex-direction:column;align-items:flex-start;gap:10px}
  .detail{padding:108px 5vw 80px}.dleft img{width:100%}}