/* ===== v2 · 暖金纸色画册风 =====
 * 设计语言取自长图本身：
 * 米纸底 / 金棕主色 / 深棕黑标题 / 「金竖条+黑标题+金英文」章节头体系 */

:root{
  --paper:#f4f0e5;        /* 米纸底 */
  --paper-deep:#ebe4d0;   /* 深一档米色 */
  --card:#ffffff;
  --gold:#b3924f;         /* 金棕主色 */
  --gold-deep:#8f7038;
  --gold-soft:#e5d6b2;
  --ink:#221d14;          /* 深棕黑标题 */
  --text:#6b6353;         /* 暖灰棕正文 */
  --line:#ddd2b6;
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
html,body{height:100%;}
body{
  font-family:"Noto Serif SC","Songti SC","SimSun",serif;
  background:#1e1911;
  color:var(--ink);
}
.sans{font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;}

/* 章节头体系：金竖条 + 黑标题 + 金英文（长图同款） */
.sec-head{display:flex;align-items:stretch;gap:14px;text-align:left;}
.sec-head i{width:7px;background:var(--gold);flex-shrink:0;}
.sec-head h2{font-size:24px;letter-spacing:4px;color:var(--ink);line-height:1.25;}
.sec-head .en{
  font-size:10px;letter-spacing:3px;color:var(--gold);
  margin-top:6px;text-transform:uppercase;
}

/* 手机容器：桌面端居中模拟手机宽 */
.phone{
  position:relative;
  max-width:430px;
  margin:0 auto;
  height:100vh;
  height:100dvh;
  background:var(--paper);
  box-shadow:0 0 60px rgba(0,0,0,.55);
  overflow:hidden;
}
@media(min-width:480px){
  .phone{height:92dvh;margin-top:4dvh;border-radius:24px;}
}

.page{
  position:absolute;inset:0;
  display:none;
  flex-direction:column;
  background:var(--paper);
}
.page.active{display:flex;}

/* ===== 封面：刊头照片 + 米色排版区 ===== */
#cover{padding:0;}
.cover-photo{
  height:52%;
  min-height:280px;
  position:relative;
  overflow:hidden;
  background:var(--gold-soft);
}
.cover-photo::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:4px;
  background:linear-gradient(90deg,var(--gold),var(--gold-soft) 60%,var(--gold));
}
.cover-photo img{width:100%;height:100%;object-fit:cover;object-position:top;display:block;}
.cover-panel{
  flex:1;
  display:flex;flex-direction:column;align-items:center;text-align:center;
  padding:26px 30px 24px;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(179,146,79,.12), transparent 62%),
    var(--paper);
}
.cover-eyebrow{
  font-size:10.5px;letter-spacing:5px;color:var(--gold);
  text-transform:uppercase;
}
.cover-title{
  margin-top:12px;
  font-size:38px;font-weight:700;letter-spacing:6px;line-height:1.3;color:var(--ink);
}
.cover-title .accent{color:var(--gold);display:block;margin-top:2px;}
.cover-rule{display:flex;align-items:center;gap:10px;margin:16px 0 12px;width:180px;}
.cover-rule::before,.cover-rule::after{content:"";flex:1;height:1px;background:var(--line);}
.cover-rule i{flex:0 0 26px;height:2px;background:var(--gold);}
.cover-slogan{font-size:12.5px;letter-spacing:4px;color:var(--text);font-style:italic;}
.cover-issue{
  display:inline-block;margin-top:14px;
  font-size:10.5px;letter-spacing:2px;color:var(--gold-deep);
  border:1px solid var(--gold-soft);padding:6px 16px;background:rgba(255,255,255,.5);
}
.enter-btn{
  margin-top:auto;
  background:var(--gold);color:#fff;
  border:none;padding:13px 46px;
  font-size:14px;letter-spacing:4px;cursor:pointer;
  font-family:inherit;
}
.enter-btn:active{transform:scale(.97);}
.cover-bottom{
  margin-top:16px;
  font-size:10.5px;color:var(--text);letter-spacing:1.5px;line-height:1.8;
}

/* ===== 顶栏（目录 / 详情通用，浅色） ===== */
.topbar{
  position:relative;z-index:10;
  display:flex;align-items:center;gap:10px;
  padding:12px 16px;
  background:rgba(244,240,229,.97);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px);
}
.back-btn{
  width:34px;height:34px;border-radius:50%;
  background:transparent;
  border:1px solid var(--gold);
  color:var(--gold-deep);font-size:18px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  flex-shrink:0;
}
.back-btn:active{background:var(--gold-soft);}
.bar-issue{font-size:10.5px;letter-spacing:2px;color:var(--gold);}
.bar-title{
  font-size:14px;letter-spacing:2px;color:var(--ink);
  margin-left:auto;
}
.bar-title-art{
  margin-left:0;flex:1;min-width:0;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  text-align:left;
}
.topbar .bar-issue:last-child{margin-left:auto;flex-shrink:0;}

/* ===== 目录 ===== */
.toc-scroll{flex:1;overflow-y:auto;padding:24px 22px 30px;-webkit-overflow-scrolling:touch;}
.toc-head{
  padding-bottom:18px;margin-bottom:18px;
  border-bottom:1px solid var(--line);
  display:flex;align-items:flex-end;justify-content:space-between;gap:12px;
}
.toc-issue{font-size:10px;letter-spacing:2px;color:var(--gold-deep);padding-bottom:6px;white-space:nowrap;}
.toc-item{
  display:flex;align-items:stretch;gap:0;
  background:var(--card);
  margin-bottom:14px;
  box-shadow:0 1px 10px rgba(90,70,30,.07);
  cursor:pointer;
  transition:transform .15s;
}
.toc-item:active{transform:scale(.98);}
.toc-item::before{content:"";width:6px;background:var(--gold);flex-shrink:0;}
.toc-item .info{flex:1;min-width:0;padding:16px 14px 15px;}
.toc-item .cat{
  display:inline-block;font-size:9px;letter-spacing:2px;color:var(--gold);
  border:1px solid var(--gold-soft);padding:2px 8px;margin-bottom:8px;
  text-transform:uppercase;
}
.toc-item .t{font-size:15px;line-height:1.55;color:var(--ink);}
.toc-item .d{font-size:10.5px;color:var(--text);margin-top:7px;line-height:1.5;}
.toc-item .cell{
  flex-shrink:0;width:44px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;
  border-left:1px dashed var(--line);
}
.toc-item .no{font-size:20px;font-style:italic;color:var(--gold);}
.toc-item .arrow{color:var(--gold);font-size:16px;}
.toc-foot{
  text-align:center;margin-top:20px;
  font-size:10px;color:var(--text);letter-spacing:1px;
}

/* ===== 详情（长图） ===== */
.progress{
  position:absolute;top:0;left:0;right:0;height:3px;z-index:20;
}
.progress-bar{height:100%;width:0;background:var(--gold);transition:width .1s linear;}
.art-caption{
  padding:20px 22px 16px;
  border-bottom:1px solid var(--line);
}
.art-caption .art-meta{
  margin-top:10px;font-size:10.5px;color:var(--text);letter-spacing:1px;
}
.art-scroll{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;}
.art-body{padding:18px 16px 34px;}
.art-img-wrap{
  position:relative;background:var(--paper-deep);
  min-height:320px;
  box-shadow:0 2px 14px rgba(90,70,30,.1);
}
.art-loading{
  position:absolute;inset:0;
  display:flex;align-items:center;justify-content:center;
  font-size:12px;letter-spacing:3px;color:var(--text);
}
.art-loading .dots::after{content:"…";}
#art-img{
  display:block;width:100%;height:auto;
  opacity:0;transition:opacity .4s ease;
}
#art-img.loaded{opacity:1;}
.art-end{text-align:center;margin-top:26px;}
.art-end-line{font-size:11px;letter-spacing:3px;color:var(--text);margin-bottom:16px;}
.back-toc-btn{
  background:var(--ink);color:var(--paper);
  border:none;padding:12px 38px;
  font-size:13px;letter-spacing:3px;cursor:pointer;
  font-family:inherit;
}
.back-toc-btn:active{transform:scale(.97);}
.art-foot{
  text-align:center;padding-top:18px;margin-top:24px;
  font-size:10px;color:var(--text);letter-spacing:2px;
  border-top:1px solid var(--line);
}
.to-top{
  position:absolute;right:16px;bottom:24px;z-index:15;
  width:40px;height:40px;border-radius:50%;
  background:var(--gold);color:#fff;
  border:none;
  font-size:16px;cursor:pointer;
  display:none;align-items:center;justify-content:center;
  box-shadow:0 4px 12px rgba(90,70,30,.35);
}
.to-top.show{display:flex;}

/* ===== 加载失败 ===== */
.load-error{
  position:absolute;inset:0;z-index:50;
  background:var(--paper);color:var(--ink);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;text-align:center;font-size:18px;letter-spacing:2px;
  padding:0 30px;
}
.load-error .sans{font-size:12px;color:var(--text);letter-spacing:1px;line-height:2;}
.hidden{display:none !important;}