/* 君笑堂·易经文化典籍库 —— 国风书卷视觉（宣纸·朱砂·墨韵 · 移动优先 · 零外部依赖） */
:root{
  --paper:#f6f1e5; --paper2:#efe6d2; --ink:#2b2620; --ink2:#5b5347;
  --red:#8a1f1f; --red2:#a83232; --line:#d9cdb2; --gold:#a9834c;
  --shadow:0 2px 10px rgba(96,74,44,.08), 0 10px 30px rgba(96,74,44,.06);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Serif SC","Songti SC","STSong","SimSun","Kaiti SC",serif;
  color:var(--ink); line-height:1.75;
  -webkit-text-size-adjust:100%;
  /* 宣纸底色：暖白 + 细密纸纹（纯 CSS 渐变模拟，无图片） */
  background:
    repeating-linear-gradient(0deg, rgba(160,130,80,.028) 0 1px, transparent 1px 3px),
    repeating-linear-gradient(90deg, rgba(160,130,80,.02) 0 1px, transparent 1px 4px),
    linear-gradient(180deg,#f8f3e8 0%,#f4eedf 100%);
  background-attachment:fixed;
}
::selection{background:rgba(138,31,31,.18)}
a{color:var(--red);text-decoration:none}
a:hover{color:var(--red2)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--paper2)}
::-webkit-scrollbar-thumb{background:#c9b28a;border-radius:6px;border:2px solid var(--paper2)}
::-webkit-scrollbar-thumb:hover{background:var(--gold)}

/* ── 顶栏：朱线界栏 + 印记 ── */
.topbar{
  position:sticky;top:0;z-index:20;
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  padding:10px 18px;background:rgba(248,243,232,.9);
  backdrop-filter:blur(8px);
  border-bottom:3px double var(--red);   /* 传统双线界栏 */
}
.brand{
  font-size:19px;font-weight:700;color:var(--red);cursor:pointer;
  letter-spacing:2px;display:flex;align-items:center;gap:8px;white-space:nowrap;
}
/* 白文印章「君」 */
.seal{
  display:inline-flex;align-items:center;justify-content:center;
  width:26px;height:26px;border-radius:4px;flex:none;
  background:var(--red);color:#f8f3e8;
  font-size:15px;font-weight:700;line-height:1;
  box-shadow:inset 0 0 0 1.5px rgba(248,243,232,.55);
  font-family:"Kaiti SC","STKaiti","KaiTi",serif;
}
.brand:hover .seal{transform:rotate(-4deg)}
.seal,.nav a{transition:transform .18s,color .18s}
.nav{display:flex;gap:16px;font-size:15px}
.nav a{color:var(--ink2);padding:2px 0;border-bottom:2px solid transparent}
.nav a:hover{color:var(--red);border-bottom-color:var(--red)}
.searchbox{margin-left:auto;display:flex;gap:6px}
.searchbox input{
  width:170px;max-width:42vw;padding:6px 12px;
  border:1px solid var(--line);border-radius:3px;background:rgba(255,255,252,.85);
  font-family:inherit;font-size:14px;color:var(--ink);outline:none;
  transition:border-color .15s, box-shadow .15s;
}
.searchbox input:focus{border-color:var(--gold);box-shadow:0 0 0 3px rgba(169,131,76,.15)}
.searchbox button{
  padding:6px 14px;border:none;border-radius:3px;background:var(--red);
  color:#f8f3e8;cursor:pointer;font-family:inherit;font-size:14px;letter-spacing:2px;
  transition:background .15s;
}
.searchbox button:hover{background:var(--red2)}

/* ── 主体 ── */
#app{max-width:1080px;margin:0 auto;padding:20px 16px 60px}

/* 首页 hero：卷轴横披 + 竖排引言 */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(ellipse at 85% 20%, rgba(169,131,76,.10), transparent 55%),
    linear-gradient(135deg,#fff9ee 0%,#f3e8cf 100%);
  border:1px solid var(--line);border-radius:6px;
  padding:30px 26px;margin-bottom:26px;
  box-shadow:var(--shadow);
}
.hero::before{            /* 天头装饰细线 */
  content:'';position:absolute;left:0;right:0;top:0;height:4px;
  background:linear-gradient(90deg,var(--red) 0 18%,var(--gold) 18% 22%,transparent 22%);
  opacity:.85;
}
.hero h1{margin:0 0 8px;font-size:27px;color:var(--red);letter-spacing:4px}
.hero p{margin:5px 0;color:var(--ink2);font-size:15px}
.hero .meta{font-size:13px;color:var(--gold);margin-top:10px;letter-spacing:1px}
.hero .motto{             /* 竖排引言：观乎人文，以化成天下 */
  position:absolute;right:22px;top:26px;
  writing-mode:vertical-rl;font-family:"Kaiti SC","STKaiti","KaiTi",serif;
  font-size:15px;letter-spacing:6px;color:rgba(138,31,31,.5);
  border-right:1px solid rgba(138,31,31,.25);padding-right:8px;height:118px;
  user-select:none;pointer-events:none;
}
.hero .stats{margin-top:12px;font-size:14px;color:var(--ink)}
.hero .stats b{color:var(--red);font-size:17px}

/* 区块标题：朱线 + 云纹尾饰 */
.section-title{
  display:flex;align-items:baseline;gap:10px;margin:30px 0 14px;
}
.section-title h2{
  margin:0;font-size:20px;color:var(--ink);letter-spacing:2px;position:relative;
  padding-left:12px;
}
.section-title h2::before{
  content:'';position:absolute;left:0;top:6px;bottom:6px;width:4px;
  background:var(--red);border-radius:2px;
}
.section-title span{font-size:13px;color:var(--ink2)}
.section-title::after{
  content:'❖';flex:1;text-align:right;font-size:11px;color:rgba(169,131,76,.55);
  letter-spacing:6px;overflow:hidden;white-space:nowrap;
}

/* 类目卡：折扇面式 */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.cat-card{
  position:relative;background:rgba(255,255,251,.92);
  border:1px solid var(--line);border-radius:4px;
  padding:15px 14px 12px;cursor:pointer;transition:.18s;overflow:hidden;
}
.cat-card::before{        /* 角饰 */
  content:'';position:absolute;right:-1px;top:-1px;width:16px;height:16px;
  background:linear-gradient(225deg,rgba(169,131,76,.4) 0 50%,transparent 50%);
  opacity:0;transition:.18s;
}
.cat-card:hover{
  transform:translateY(-3px);box-shadow:var(--shadow);
  border-color:var(--gold);background:#fffdf6;
}
.cat-card:hover::before{opacity:1}
.cat-card .cname{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:1px}
.cat-card .ccount{font-size:13px;color:var(--ink2);margin-top:5px}
.cat-card .ccount::before{content:'— ';color:var(--gold)}

/* 书卡：书脊式 */
.book-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}
.book-card{
  position:relative;background:rgba(255,255,251,.92);
  border:1px solid var(--line);border-radius:4px;
  padding:14px 14px 14px 20px;cursor:pointer;transition:.18s;
}
.book-card::before{       /* 书脊 */
  content:'';position:absolute;left:0;top:0;bottom:0;width:5px;
  background:linear-gradient(180deg,var(--red) 0%,#6d1818 100%);
  border-radius:4px 0 0 4px;opacity:.75;transition:.18s;
}
.book-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--gold)}
.book-card:hover::before{opacity:1}
.book-card .bt{font-size:16px;font-weight:700;color:var(--ink)}
.book-card .bm{font-size:13px;color:var(--ink2);margin-top:5px}
.book-card .badge{
  display:inline-block;font-size:12px;color:#f8f3e8;background:var(--gold);
  border-radius:2px;padding:1px 8px;margin-right:6px;letter-spacing:1px;
}

/* ── 阅读页 ── */
.reader-wrap{max-width:780px;margin:0 auto}
.reader-head{margin-bottom:14px}
.reader-head .rt{font-size:23px;font-weight:700;color:var(--red);letter-spacing:2px}
.reader-head .rm{font-size:13px;color:var(--ink2);margin-top:4px}
.reader{
  position:relative;
  background:
    repeating-linear-gradient(0deg, rgba(160,130,80,.02) 0 1px, transparent 1px 4px),
    linear-gradient(180deg,#fffdf6,#fbf6e9);
  border:1px solid var(--line);border-radius:6px;
  box-shadow:var(--shadow);
  padding:30px 34px;white-space:pre-wrap;word-break:break-word;
  font-size:17.5px;line-height:2.15;color:#332c22;
  font-family:"Noto Serif SC","Songti SC","Kaiti SC",serif;
}
.loading{color:var(--ink2);padding:30px;text-align:center}
.back{
  display:inline-block;margin:10px 0;font-size:14px;color:var(--red);
}
.back::before{content:'← '}

/* ── 关于页 ── */
.about{
  max-width:780px;margin:0 auto;background:rgba(255,255,251,.94);
  border:1px solid var(--line);border-radius:6px;padding:26px;box-shadow:var(--shadow);
}
.about h2{color:var(--red);margin-top:0;letter-spacing:2px}
.about h3{color:var(--ink);border-left:4px solid var(--gold);padding-left:10px}
.about .disc{
  background:var(--paper2);border-left:3px solid var(--red);
  padding:12px 14px;border-radius:4px;font-size:14px;color:var(--ink2);line-height:2;
}

/* ── 页脚 ── */
.foot{
  text-align:center;color:var(--ink2);font-size:12px;
  padding:26px 16px;margin-top:34px;
  border-top:3px double var(--red);
  background:linear-gradient(180deg,transparent,rgba(169,131,76,.06));
}

/* ── 全文检索 ── */
.sub-title{
  font-size:15px;font-weight:700;color:var(--red);margin:20px 0 10px;
  padding-left:10px;border-left:3px solid var(--red);letter-spacing:1px;
}
.hl-bar{
  max-width:780px;margin:0 auto 12px;font-size:13px;color:var(--ink2);
  background:rgba(249,233,168,.4);border:1px dashed var(--gold);
  border-radius:4px;padding:8px 12px;
}
.hl-bar b{color:var(--red)}
.reader mark,.d-abs mark{
  background:linear-gradient(180deg,transparent 55%,#f5d97e 55%);
  color:#6b3f10;padding:1px 0;border-radius:2px;font-weight:700;
}

/* ── 书籍详情页 ── */
.detail{
  max-width:780px;margin:0 auto;
  background:
    repeating-linear-gradient(0deg, rgba(160,130,80,.02) 0 1px, transparent 1px 4px),
    linear-gradient(180deg,#fffdf6,#fbf6e9);
  border:1px solid var(--line);border-radius:6px;
  box-shadow:var(--shadow);padding:26px 26px 22px;
}
.d-head{border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:16px;position:relative}
.d-head .dt{font-size:25px;font-weight:700;color:var(--red);letter-spacing:2px}
.d-head .dm{font-size:13px;color:var(--ink2);margin:9px 0 16px}
.d-head .badge{
  display:inline-block;font-size:12px;color:#f8f3e8;background:var(--gold);
  border-radius:2px;padding:1px 8px;margin-right:6px;letter-spacing:1px;
}
.d-head .badge-trad{background:#4a7a6b}
.d-trad-hint{
  margin-top:12px;padding:9px 13px;font-size:13px;line-height:1.7;color:#33544a;
  background:rgba(74,122,107,.07);border:1px dashed rgba(74,122,107,.45);border-radius:4px;
}
.btn-read{
  display:inline-block;background:var(--red);color:#f8f3e8;text-decoration:none;
  padding:10px 30px;border-radius:3px;font-size:15px;letter-spacing:4px;
  box-shadow:0 2px 8px rgba(138,31,31,.3);transition:.15s;
}
.btn-read:hover{background:var(--red2);color:#fff;transform:translateY(-1px)}
.btn-read:active{transform:none}
.d-abs{font-size:15px;line-height:2;color:#4a4237;margin:4px 0 20px;text-align:justify}
.d-abs.dim{color:var(--ink2)}
.toc-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:4px 18px;margin-bottom:8px}
.toc-item{
  font-size:14px;color:#332c22;padding:7px 10px;
  border-bottom:1px dashed var(--line);cursor:pointer;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:.12s;
}
.toc-item::before{content:'·';color:var(--gold);margin-right:6px}
.toc-item:hover{color:var(--red);background:rgba(169,131,76,.09);border-radius:4px}

/* ── 阅读页：分段段落 + 翻页栏 + 书签 ── */
.reader-head .bm-add{
  position:absolute;right:0;top:0;
  padding:6px 14px;border:1px solid var(--gold);border-radius:3px;
  background:rgba(255,255,251,.9);color:var(--red);cursor:pointer;
  font-family:inherit;font-size:13px;letter-spacing:1px;transition:.15s;
}
.reader-head .bm-add:hover{background:var(--red);color:#f8f3e8;border-color:var(--red)}
/* 繁简显示切换：默认「简」，开启后变「繁」并置为朱砂实心 */
.reader-head .simp-btn{
  position:absolute;right:104px;top:0;
  padding:6px 14px;border:1px solid var(--gold);border-radius:3px;
  background:rgba(255,255,251,.9);color:var(--red);cursor:pointer;
  font-family:inherit;font-size:13px;letter-spacing:1px;transition:.15s;
}
.reader-head .simp-btn:hover{background:var(--red);color:#f8f3e8;border-color:var(--red)}
.reader-head .simp-btn.on{background:var(--red);color:#f8f3e8;border-color:var(--red)}
.reader-head{position:relative;padding-right:178px}
.r-para{margin:0 0 1.15em;text-indent:0}
.r-para:first-child{margin-top:0}
/* 段落译文：段落下「今译」「英文」按钮 + 展开面板 */
.r-trans-bar{margin:-.7em 0 1.15em;display:flex;gap:8px}
.r-tbtn{
  padding:2px 12px;border:1px solid var(--gold);border-radius:12px;
  background:#fffdf6;color:var(--red);font-family:inherit;font-size:12px;
  cursor:pointer;user-select:none;transition:.15s;
}
.r-tbtn:hover{background:var(--gold);color:#fffdf6}
.r-tbtn.on{background:var(--gold);color:#fffdf6}
.r-trans{
  margin:0 0 1.2em;padding:10px 14px;
  border-left:3px solid var(--gold);border-radius:0 5px 5px 0;
  background:rgba(255,253,246,.7);font-size:.94em;line-height:1.8;color:var(--ink2);
}
.r-trans-e{color:#5a6b7a;font-style:italic}
.r-trans-tag{
  font-style:normal;font-size:11px;color:#fff;background:var(--red);
  border-radius:3px;padding:1px 6px;margin-right:8px;vertical-align:1px;
}
.r-trans-e .r-trans-tag{background:#5a6b7a}
/* 繁体现代版对照：青绿系，与今译（朱金）、英文（黛蓝）三色可辨 */
.r-modern{border-left-color:#4a7a6b;color:#33544a}
.r-modern .r-trans-tag{background:#4a7a6b}
/* 全书级译文声明：阅读页头部一行， subtle 不抢读 */
.r-trans-note{
  margin-top:10px;padding:8px 12px;
  border:1px dashed var(--line);border-radius:4px;
  background:rgba(250,246,236,.6);
  font-size:12px;line-height:1.7;color:var(--ink2);
}
.pager{
  position:sticky;bottom:0;z-index:5;
  display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;
  margin-top:18px;padding:12px 14px;
  background:rgba(248,243,232,.96);backdrop-filter:blur(6px);
  border:1px solid var(--line);border-radius:6px;box-shadow:var(--shadow);
}
.pg-btn{
  padding:7px 16px;border:1px solid var(--line);border-radius:3px;
  background:#fffdf6;color:var(--ink);cursor:pointer;
  font-family:inherit;font-size:14px;transition:.15s;
}
.pg-btn:hover:not([disabled]){border-color:var(--gold);color:var(--red)}
.pg-btn[disabled]{opacity:.4;cursor:not-allowed}
.pg-info{font-size:14px;color:var(--ink2)}
.pg-info b{color:var(--red);font-size:16px}
.pg-jump{
  width:64px;padding:6px 8px;text-align:center;
  border:1px solid var(--line);border-radius:3px;background:#fffdf6;
  font-family:inherit;font-size:14px;color:var(--ink);outline:none;
}
.pg-jump:focus{border-color:var(--gold);box-shadow:0 0 0 3px rgba(169,131,76,.15)}

/* 书签列表 */
.bm-list{display:flex;flex-direction:column;gap:10px;max-width:780px;margin:0 auto}
.bm-item{
  display:flex;align-items:center;gap:12px;
  background:rgba(255,255,251,.92);border:1px solid var(--line);border-radius:5px;
  padding:12px 14px;transition:.15s;
}
.bm-item:hover{box-shadow:var(--shadow);border-color:var(--gold)}
.bm-main{flex:1;cursor:pointer}
.bm-main:hover .bm-title{color:var(--red)}
.bm-title{font-size:16px;font-weight:700;color:var(--ink)}
.bm-meta{font-size:13px;color:var(--ink2);margin-top:3px}
.bm-time{font-size:12px;color:var(--gold);margin-top:2px}
.bm-del{
  flex:none;padding:6px 14px;border:1px solid var(--line);border-radius:3px;
  background:#fffdf6;color:var(--red2);cursor:pointer;font-family:inherit;font-size:13px;transition:.15s;
}
.bm-del:hover{background:var(--red2);color:#f8f3e8;border-color:var(--red2)}

/* 轻提示 */
#toast{
  position:fixed;left:50%;bottom:42px;transform:translateX(-50%) translateY(20px);
  background:var(--ink);color:#f8f3e8;padding:10px 20px;border-radius:6px;
  font-size:14px;letter-spacing:1px;box-shadow:var(--shadow);
  opacity:0;pointer-events:none;transition:.25s;z-index:60;max-width:90vw;text-align:center;
}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ── 手机适配 ── */
@media (max-width:560px){
  .brand{font-size:17px;letter-spacing:1px}
  .nav{font-size:14px;gap:12px}
  .searchbox input{width:118px}
  .hero{padding:22px 18px}
  .hero h1{font-size:22px;letter-spacing:2px}
  .hero .motto{display:none}
  .reader{font-size:16px;line-height:1.95;padding:18px 16px}
  .reader-head{padding-right:0}
  .reader-head .bm-add{position:static;display:block;margin-top:10px}
  .pager{gap:6px;padding:10px 8px}
  .pg-btn{padding:6px 11px;font-size:13px}
  .pg-jump{width:52px}
  #app{padding:14px 12px 50px}
  .section-title h2{font-size:18px}
}

/* ── 古籍图册（彩绘原图） ── */
.btn-gallery{
  display:inline-block;margin-top:10px;margin-left:8px;
  padding:9px 18px;border:1px solid var(--gold);border-radius:6px;
  background:linear-gradient(180deg,#f3e9d4,#e9dcbe);
  color:#6b4f22;font-size:15px;letter-spacing:1px;
}
.btn-gallery:hover{background:linear-gradient(180deg,#f8f0dd,#eee1c4);color:var(--red)}

/* 阅读页「看图」按钮 */
.r-gallery-bar{margin:2px 0 14px}
.r-gbtn{
  padding:7px 15px;font-size:14px;letter-spacing:.5px;cursor:pointer;
  border:1px solid var(--line);border-radius:20px;
  background:linear-gradient(180deg,#fbf6ea,#f0e7d3);color:var(--ink2);
  font-family:inherit;
}
.r-gbtn:hover{border-color:var(--gold);color:var(--red)}

/* 图册页 */
.g-page{padding-bottom:20px}
.g-page-h{margin:6px 0 12px}
.g-page-h .dt{font-size:21px;font-weight:700;letter-spacing:2px;color:var(--red)}
.g-note{
  font-size:13px;line-height:1.9;color:var(--ink2);
  background:rgba(169,131,76,.09);border-left:3px solid var(--gold);
  padding:11px 14px;border-radius:0 6px 6px 0;margin:0 0 16px;
}
.g-cards{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px;
}
.g-card{
  margin:0;background:var(--paper);border:1px solid var(--line);
  border-radius:6px;overflow:hidden;cursor:pointer;
  box-shadow:var(--shadow);transition:transform .16s ease,border-color .16s ease;
}
.g-card:hover{transform:translateY(-3px);border-color:var(--gold)}
.g-card img{display:block;width:100%;height:206px;object-fit:cover;object-position:center top}
.g-card figcaption{
  font-size:13px;color:var(--ink2);text-align:center;
  padding:8px 4px;letter-spacing:.5px;border-top:1px solid var(--line);background:var(--paper2);
}

/* 原图灯箱 */
.g-box{
  position:fixed;inset:0;z-index:200;display:none;
  background:rgba(28,22,16,.9);padding:20px;
}
.g-box.on{display:flex;align-items:center;justify-content:center}
.g-inner{position:relative;display:flex;align-items:center;gap:10px;max-width:100%;max-height:100%}
.g-fig{margin:0;display:flex;flex-direction:column;align-items:center;gap:10px;max-height:94vh}
.g-img{
  display:block;max-width:min(92vw,820px);max-height:82vh;object-fit:contain;
  border-radius:4px;box-shadow:0 10px 40px rgba(0,0,0,.5);background:#f6f1e5;
}
.g-cap{font-size:15px;color:#efe6d2;letter-spacing:1px;text-align:center}
.g-cap .g-dim{color:#a08f72;font-size:13px}
.g-close{
  position:absolute;top:-6px;right:-6px;width:36px;height:36px;
  border-radius:50%;border:1px solid rgba(255,255,255,.3);
  background:rgba(60,48,36,.9);color:#f0e6d2;font-size:17px;cursor:pointer;line-height:1;
}
.g-close:hover{background:var(--red)}
.g-nav{
  flex:none;width:44px;height:64px;border-radius:6px;
  border:1px solid rgba(255,255,255,.22);background:rgba(60,48,36,.7);
  color:#f0e6d2;font-size:30px;cursor:pointer;line-height:1;
}
.g-nav:hover{background:var(--red);border-color:var(--red)}

@media (max-width:560px){
  .g-cards{grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:10px}
  .g-card img{height:158px}
  .g-cap{font-size:13px}
  .g-nav{width:34px;height:52px;font-size:24px}
  .g-img{max-width:78vw;max-height:74vh}
}
.d-gallery-hint{
  margin-top:10px;padding:9px 13px;border-left:3px solid var(--gold);
  background:rgba(169,131,76,.09);font-size:13px;line-height:1.85;color:var(--ink2);
}
.g-cap .g-src{display:block;margin-top:4px;font-size:12px;color:#a08f72;font-style:normal}