/* ===========================================
   劉一明文化陳列館 · 主樣式
   宣紙底 · 墨色字 · 朱砂點 · 茶褐線
   =========================================== */

@font-face{
  font-family:"Noto Serif SC";font-style:normal;font-weight:400;font-display:swap;
  src:url("/fonts/NotoSerifSC-Regular.woff2") format("woff2");
}
@font-face{
  font-family:"Noto Serif SC";font-style:normal;font-weight:700;font-display:swap;
  src:url("/fonts/NotoSerifSC-Bold.woff2") format("woff2");
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

:root{
  --paper:#f5f0e6;
  --paper2:#ede6d6;
  --ink:#2c2218;
  --ink-light:#5a4a3a;
  --ink-faint:#8a7a68;
  --cinnabar:#b5342e;
  --tea:#6b4226;
  --tea-light:#8b6914;
  --gold:#c9a84c;
  --line:rgba(107,66,38,.16);
  --card:rgba(250,245,235,.92);
  --font:"Noto Serif SC","PingFang SC","Microsoft YaHei",serif;
}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  background:var(--paper);
  color:var(--ink);
  line-height:1.9;
  overflow-x:hidden;
}
/* 宣紙纖維噪點 */
body::before{
  content:'';position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:url("data:image/svg+xml,%3Csvg width='300' height='300' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='.65' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='.035'/%3E%3C/svg%3E");
}
a{color:var(--tea);text-decoration:none;transition:color .25s}
a:hover{color:var(--cinnabar)}
img{max-width:100%;height:auto;display:block}

/* ===== 頂欄 ===== */
.site-header{
  position:sticky;top:0;z-index:900;
  background:rgba(245,240,230,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(12px);
}
.header-inner{
  max-width:1180px;margin:0 auto;padding:0 20px;
  height:60px;display:flex;align-items:center;gap:20px;
}
.brand{
  font-size:19px;font-weight:700;letter-spacing:3px;color:var(--ink);
  white-space:nowrap;flex-shrink:0;
}
.brand:hover{color:var(--ink)}
.brand .seal{
  display:inline-block;background:var(--cinnabar);color:#fff;
  font-size:13px;padding:1px 6px;border-radius:3px;
  letter-spacing:1px;margin-right:8px;vertical-align:2px;font-weight:400;
}

/* 主導航 */
.main-nav{display:flex;gap:2px;flex:1;overflow-x:auto;scrollbar-width:none}
.main-nav::-webkit-scrollbar{display:none}
.main-nav a{
  padding:6px 13px;font-size:14.5px;letter-spacing:1.5px;
  color:var(--ink-light);white-space:nowrap;border-radius:4px;
  transition:all .25s;
}
.main-nav a:hover{background:rgba(107,66,38,.07);color:var(--tea)}
.main-nav a.active{background:var(--tea);color:#fff}

.nav-toggle{display:none;background:none;border:1px solid var(--line);
  border-radius:5px;padding:5px 10px;font-family:var(--font);font-size:14px;
  color:var(--tea);cursor:pointer}

/* ===== 容器 ===== */
.wrap{max-width:1180px;margin:0 auto;padding:0 20px;position:relative;z-index:1}
.wrap-narrow{max-width:840px;margin:0 auto;padding:0 20px;position:relative;z-index:1}

/* ===== 首頁 ===== */
.hero{
  text-align:center;padding:70px 20px 54px;position:relative;z-index:1;
  border-bottom:1px solid var(--line);
}
.hero h1{
  font-size:clamp(30px,5.2vw,46px);letter-spacing:clamp(4px,1.6vw,12px);
  font-weight:700;color:var(--ink);line-height:1.4;
}
.hero .sub{
  margin-top:16px;font-size:15px;letter-spacing:3px;color:var(--ink-faint);
}
.hero .rule{
  width:60px;height:2px;background:var(--cinnabar);
  margin:26px auto 0;opacity:.75;
}

/* 欄目卡片 */
.sections-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(268px,1fr));
  gap:22px;padding:52px 0 30px;
}
.sec-card{
  background:var(--card);border:1px solid var(--line);border-radius:10px;
  padding:28px 26px 24px;position:relative;overflow:hidden;
  transition:transform .3s,box-shadow .3s,border-color .3s;
  display:flex;flex-direction:column;
}
.sec-card::before{
  content:'';position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--cinnabar);opacity:0;transition:opacity .3s;
}
.sec-card:hover{
  transform:translateY(-3px);
  box-shadow:0 10px 28px rgba(44,34,24,.09);
  border-color:rgba(107,66,38,.3);
}
.sec-card:hover::before{opacity:1}
.sec-num{
  font-size:12px;letter-spacing:2px;color:var(--gold);margin-bottom:8px;
}
.sec-card h2{
  font-size:23px;letter-spacing:4px;font-weight:700;color:var(--ink);
  margin-bottom:12px;
}
.sec-card .intro{
  font-size:14px;color:var(--ink-light);line-height:1.85;flex:1;
  margin-bottom:16px;
}
.sec-meta{
  font-size:12.5px;color:var(--ink-faint);letter-spacing:1px;
  padding-top:14px;border-top:1px dashed var(--line);
  display:flex;justify-content:space-between;
}

/* ===== 欄目頁 ===== */
.sec-head{
  padding:46px 0 34px;border-bottom:1px solid var(--line);position:relative;z-index:1;
}
.sec-head .eyebrow{font-size:12.5px;letter-spacing:3px;color:var(--gold);margin-bottom:10px}
.sec-head h1{font-size:clamp(26px,4vw,36px);letter-spacing:6px;font-weight:700}
.sec-head .desc{
  margin-top:16px;font-size:15px;color:var(--ink-light);max-width:720px;line-height:1.95;
}

/* 章列表 */
.ch-list{padding:30px 0 60px}
.ord-note{
  font-size:12.5px;color:var(--ink-faint);letter-spacing:.8px;
  padding:0 4px 16px;border-bottom:1px solid var(--line);
}
.ch-item{
  display:block;padding:22px 4px;border-bottom:1px solid var(--line);
  transition:padding-left .25s,background .25s;
}
.ch-item:hover{background:rgba(107,66,38,.03);padding-left:14px}
.ch-item .ch-top{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}
.ch-item .ch-no{
  font-size:12px;color:var(--gold);letter-spacing:2px;
  border:1px solid var(--gold);border-radius:3px;padding:0 6px;
  opacity:.85;flex-shrink:0;
}
.ch-item h3{
  font-size:19px;font-weight:700;letter-spacing:2px;color:var(--ink);
  flex:1;min-width:180px;
}
.ch-item .ch-stat{font-size:12.5px;color:var(--ink-faint);letter-spacing:1px;white-space:nowrap}
.ch-item .ch-excerpt{
  margin-top:9px;font-size:14px;color:var(--ink-light);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
  overflow:hidden;line-height:1.85;
}

/* ===== 章頁 ===== */
.crumb{
  padding:20px 0 0;font-size:13px;color:var(--ink-faint);letter-spacing:1px;
  position:relative;z-index:1;
}
.crumb a{color:var(--ink-faint)}
.crumb a:hover{color:var(--cinnabar)}
.crumb span{margin:0 7px;opacity:.5}

.ch-head{padding:26px 0 32px;border-bottom:1px solid var(--line);position:relative;z-index:1}
.ch-head h1{
  font-size:clamp(24px,3.8vw,34px);letter-spacing:4px;font-weight:700;line-height:1.5;
}
.ch-head .ch-meta{
  margin-top:14px;font-size:13px;color:var(--ink-faint);letter-spacing:1.5px;
}

/* 正文流 */
.article{padding:38px 0 20px;position:relative;z-index:1}
.article p{
  font-size:17px;line-height:2.1;margin-bottom:1.25em;
  text-align:justify;letter-spacing:.3px;
}
.article p.lead{
  font-size:17.5px;color:var(--ink-light);
}
/* 小標題 */
.article h3.sub-h{
  font-size:20px;line-height:1.65;margin:2.4em 0 1em;
  font-weight:600;letter-spacing:1.2px;color:var(--ink);
  padding-left:14px;border-left:3px solid var(--cinnabar);
  text-align:left;
}
.article h4.sub-h2{
  font-size:18.5px;line-height:1.75;margin:1.9em 0 .7em;
  font-weight:600;letter-spacing:.6px;color:var(--ink);
  padding-left:11px;border-left:2px solid rgba(181,52,46,.35);
  text-align:left;
}
.article h3.sub-h:first-child,
.article h4.sub-h2:first-child{margin-top:0}
.article h3.sub-h + p,
.article h4.sub-h2 + p{margin-top:0}
/* 圖 */
.figure{margin:34px 0;text-align:center}
.figure img{
  margin:0 auto;border-radius:4px;
  box-shadow:0 4px 18px rgba(44,34,24,.11);
  background:var(--paper2);
}
.figure figcaption{
  margin-top:12px;font-size:13.5px;color:var(--ink-faint);
  letter-spacing:.5px;line-height:1.7;text-align:center;
  padding:0 10px;
}
.figure.wide img{width:100%}

/* 上一章 / 下一章 */
.ch-nav{
  display:flex;justify-content:space-between;gap:16px;
  padding:34px 0 70px;border-top:1px solid var(--line);margin-top:40px;
  position:relative;z-index:1;
}
.ch-nav a{
  flex:1;padding:16px 20px;background:var(--card);border:1px solid var(--line);
  border-radius:8px;transition:all .25s;
}
.ch-nav a:hover{border-color:var(--tea);background:#fff}
.ch-nav .dir{font-size:12px;color:var(--gold);letter-spacing:2px;display:block;margin-bottom:5px}
.ch-nav .t{font-size:15px;color:var(--ink);letter-spacing:1px}
.ch-nav .next{text-align:right}
.ch-nav .ph{flex:1}

/* ===== 頁腳 ===== */
.site-footer{
  border-top:1px solid var(--line);background:rgba(237,230,214,.5);
  padding:44px 0 34px;position:relative;z-index:1;
}
.footer-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));
  gap:32px;margin-bottom:32px;
}
.footer-block h4{
  font-size:13px;letter-spacing:3px;color:var(--tea);margin-bottom:12px;
  font-weight:700;
}
.footer-block .slot{
  font-size:13.5px;color:var(--ink-faint);line-height:2;
  border-left:2px solid var(--line);padding-left:12px;
}
.footer-block .slot em{font-style:normal;opacity:.65}
.footer-bottom{
  text-align:center;font-size:12.5px;color:var(--ink-faint);
  letter-spacing:1px;padding-top:24px;border-top:1px dashed var(--line);
}

/* ===== 響應式 ===== */
@media(max-width:900px){
  .header-inner{height:auto;padding:10px 16px;flex-wrap:wrap;gap:10px}
  .brand{font-size:17px;letter-spacing:2px}
  .nav-toggle{display:block;margin-left:auto}
  .main-nav{
    display:none;width:100%;flex-wrap:wrap;gap:4px;
    padding-bottom:8px;
  }
  .main-nav.open{display:flex}
  .main-nav a{padding:5px 10px;font-size:13.5px;letter-spacing:1px}
  .hero{padding:48px 16px 38px}
  .sections-grid{padding:32px 0 20px;gap:16px}
  .article p{font-size:16.5px;line-height:2.05}
  .ch-nav{flex-direction:column}
  .ch-nav .next{text-align:left}
}
@media(max-width:520px){
  .sec-card{padding:22px 20px 18px}
  .sec-card h2{font-size:21px}
  .ch-item h3{font-size:17px}
  .figure{margin:26px 0}
  .figure figcaption{font-size:12.5px}
}

/* ===== 簡繁切換 ===== */
.lang-toggle{
  flex:0 0 auto;margin-left:14px;
  width:30px;height:30px;padding:0;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font);font-size:14px;line-height:1;
  color:var(--cinnabar);background:transparent;
  border:1px solid rgba(181,52,46,.42);border-radius:3px;
  cursor:pointer;transition:all .2s;
}
.lang-toggle:hover{background:var(--cinnabar);color:#fff;border-color:var(--cinnabar)}
@media(max-width:900px){
  .lang-toggle{margin-left:8px}
}

/* ===== 圖片兜底 / 放大 ===== */
.img-fallback{
  display:flex;align-items:center;justify-content:center;
  min-height:140px;padding:28px 16px;
  font-size:13.5px;letter-spacing:1px;color:var(--ink-faint);
  background:var(--paper2);border:1px dashed var(--line);border-radius:3px;
}
.figure img{cursor:zoom-in}
.lightbox{
  position:fixed;inset:0;z-index:9999;
  display:flex;align-items:center;justify-content:center;
  padding:3vmin;background:rgba(28,22,16,.94);
  cursor:zoom-out;animation:fadeIn .18s ease;
}
.lightbox img{
  max-width:100%;max-height:100%;
  object-fit:contain;box-shadow:0 8px 48px rgba(0,0,0,.6);
}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}