:root {
  --primary: #8B4513;
  --primary-light: #A0522D;
  --bg: #FDF6EC;
  --bg-card: #FFFBF5;
  --bg-reader: #FFFEF9;
  --text: #2C1810;
  --text-light: #5C4033;
  --text-muted: #8B7355;
  --border: #E8D5C0;
  --shadow: rgba(139,69,19,0.08);
  --accent-gold: #D4A574;
  --tag-bg: #F5E6D3;
  --toc-width: 220px;
  --toc-bg: #F9F0E6;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent;overflow-scroll:touch}
body{font-family:'Georgia','Noto Serif SC','Source Han Serif SC','SimSun',serif;background:var(--bg);color:var(--text);line-height:1.8;min-height:100vh;padding-top:var(--safe-top);padding-bottom:var(--safe-bottom);-webkit-overflow-scrolling:touch}

/* 禁止微信内长按保存/选择图片干扰阅读 */
img{-webkit-user-select:none;user-select:none;pointer-events:none}

/* ===== 头部 ===== */
.header{background:linear-gradient(135deg,#3E2723 0%,#5D4037 50%,#4E342E 100%);color:#F5E6D3;padding:30px 20px 20px;text-align:center;position:relative;overflow:hidden}
.header::before{content:'';position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none'%3E%3Cg fill='%23D4A574' fill-opacity='0.06'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");opacity:.5}
.header-inner{position:relative;max-width:800px;margin:0 auto}
.header h1{font-size:2.2em;font-weight:700;letter-spacing:6px;margin-bottom:8px}
.header h1 span{color:var(--accent-gold)}
.header p{font-size:.95em;color:#C4A882;letter-spacing:2px}

/* 用户面板 */
.user-panel{position:absolute;right:0;top:4px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.user-info{display:flex;align-items:center;gap:6px}
.user-role{background:rgba(212,165,116,0.2);padding:2px 8px;border-radius:10px;font-size:12px;color:var(--accent-gold)}
.user-name{color:#F5E6D3;font-size:13px}
.guest-label{color:#C4A882;font-size:13px}
.auth-btn{background:rgba(212,165,116,0.15);border:1px solid rgba(212,165,116,0.3);color:var(--accent-gold);padding:4px 12px;border-radius:16px;font-size:12px;cursor:pointer;font-family:inherit;transition:background .2s;-webkit-appearance:none}
.auth-btn:hover{background:rgba(212,165,116,0.3)}

/* ===== 搜索 ===== */
.search-bar{max-width:560px;margin:-22px auto 0;position:relative;z-index:10;padding:0 16px}
.search-bar input{width:100%;padding:14px 20px 14px 48px;border:2px solid var(--border);border-radius:50px;background:var(--bg-card);font-size:16px;font-family:inherit;color:var(--text);box-shadow:0 4px 20px var(--shadow);outline:none;transition:border-color .3s,box-shadow .3s;-webkit-appearance:none}
.search-bar input:focus{border-color:var(--primary);box-shadow:0 4px 24px rgba(139,69,19,0.15)}
.search-bar .icon{position:absolute;left:34px;top:50%;transform:translateY(-50%);font-size:18px;color:var(--text-muted)}

/* ===== 分类标签 ===== */
.nav-tabs{display:flex;justify-content:center;gap:8px;padding:28px 12px 12px;flex-wrap:wrap;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.nav-tabs::-webkit-scrollbar{display:none}
.nav-tabs button{padding:8px 20px;border:2px solid var(--border);border-radius:24px;background:var(--bg-card);color:var(--text-light);font-size:14px;font-family:inherit;cursor:pointer;transition:all .25s;letter-spacing:1px;white-space:nowrap;-webkit-appearance:none;flex-shrink:0}
.nav-tabs button:hover{border-color:var(--primary-light);color:var(--primary)}
.nav-tabs button.active{background:var(--primary);color:#FFF;border-color:var(--primary)}
.nav-tabs button.bazi-entry-btn{background:linear-gradient(135deg,#c0392b,#e67e22);color:#FFF;border-color:#c0392b;font-weight:600;position:relative;overflow:hidden}
.nav-tabs button.bazi-entry-btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(192,57,43,0.3);color:#FFF}

/* ===== 书籍卡片 ===== */
.container{max-width:1100px;margin:0 auto;padding:20px 16px 60px}

.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:20px}
.book-card{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;overflow:hidden;cursor:pointer;transition:transform .25s,box-shadow .25s}
.book-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px var(--shadow)}
.book-card:active{transform:translateY(-1px)}
.book-cover{height:170px;display:flex;flex-direction:column;align-items:center;justify-content:center;position:relative;overflow:hidden}
.book-cover .cover-title{position:relative;z-index:1;font-size:1.3em;font-weight:700;color:#FFF;text-shadow:0 2px 8px rgba(0,0,0,0.3);text-align:center;padding:0 14px;line-height:1.4}
.book-cover .cover-author{position:relative;z-index:1;font-size:.85em;color:rgba(255,255,255,0.7);margin-top:6px}
.cover-lock{position:absolute;top:8px;right:8px;font-size:14px;z-index:2}
.book-info{padding:12px 14px 16px}
.book-info h3{font-size:15px;margin-bottom:4px;color:var(--text);line-height:1.4}
.book-info .author{font-size:13px;color:var(--text-muted);margin-bottom:8px}
.book-info .tags{display:flex;gap:6px;flex-wrap:wrap}
.book-info .tag{font-size:11px;padding:2px 8px;border-radius:10px;background:var(--tag-bg);color:var(--text-muted)}
.progress-badge{font-size:11px;color:var(--primary);margin-top:6px}
.copyright-badge{color:var(--primary);font-size:12px}

/* 文章列表 */
.article-list{display:flex;flex-direction:column;gap:14px}
.article-card{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:18px 20px;cursor:pointer;transition:transform .2s,box-shadow .2s}
.article-card:hover{transform:translateY(-2px);box-shadow:0 6px 20px var(--shadow)}
.article-card:active{transform:translateY(0)}
.article-card h3{font-size:17px;margin-bottom:6px;color:var(--text)}
.article-card .meta{font-size:13px;color:var(--text-muted);margin-bottom:8px}
.article-card .excerpt{font-size:14px;color:var(--text-light);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ===== 阅读器 ===== */
.reader-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.6);z-index:1000;justify-content:center;align-items:flex-start;overflow-y:auto;padding:0}
.reader-overlay.open{display:flex}
.reader-panel{background:var(--bg-reader);border-radius:16px;width:100%;max-width:1000px;min-height:100vh;box-shadow:0 20px 60px rgba(0,0,0,0.2);position:relative;margin:0}
.reader-header{padding:16px 20px 12px;border-bottom:1px solid var(--border);display:flex;align-items:flex-start;justify-content:space-between;position:sticky;top:0;background:var(--bg-reader);border-radius:16px 16px 0 0;z-index:2;padding-top:calc(12px + var(--safe-top))}
.reader-header-left{flex:1}
.reader-header h2{font-size:20px;color:var(--text)}
.reader-header .author{font-size:14px;color:var(--text-muted);margin-top:4px}
.close-btn{width:36px;height:36px;border:none;background:var(--tag-bg);border-radius:50%;font-size:18px;cursor:pointer;color:var(--text-muted);display:flex;align-items:center;justify-content:center;transition:background .2s;flex-shrink:0;margin-left:16px}
.close-btn:hover{background:var(--border)}

/* 工具栏 */
.reader-toolbar{display:flex;align-items:center;gap:10px;padding:8px 20px;border-bottom:1px solid var(--border);background:var(--bg-card);flex-wrap:wrap}
.reader-toolbar label{font-size:12px;color:var(--text-muted)}
.reader-toolbar select{font-family:inherit;font-size:12px;color:var(--text);cursor:pointer;padding:4px 8px;border:1px solid var(--border);border-radius:6px;background:#FFF;-webkit-appearance:none}
.toolbar-divider{width:1px;height:20px;background:var(--border);margin:0 4px}
.toolbar-btn{width:32px;height:32px;border:1px solid var(--border);border-radius:6px;background:#FFF;font-size:16px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s;opacity:.6;-webkit-appearance:none}
.toolbar-btn:hover{opacity:1;border-color:var(--primary)}
.toolbar-btn.active{background:var(--primary);color:#FFF;border-color:var(--primary);opacity:1}
.edition-selector{display:inline-flex;gap:4px}
.edition-btn{padding:3px 10px;border:1px solid var(--border);border-radius:4px;background:#FFF;font-size:12px;cursor:pointer;font-family:inherit;color:var(--text-light);transition:all .2s;-webkit-appearance:none}
.edition-btn.active{background:var(--primary);color:#FFF;border-color:var(--primary)}

/* 目录+内容布局 */
.reader-body-wrapper{display:flex;min-height:calc(100vh - 140px)}

/* 目录面板 */
.toc-panel{width:var(--toc-width);background:var(--toc-bg);border-right:1px solid var(--border);flex-shrink:0;transition:width .3s,opacity .3s;overflow:hidden;display:none}
.toc-panel.has-toc{display:block}
.toc-panel.collapsed{width:0;opacity:0;border-right:none}
.toc-header{padding:12px 16px 8px;font-size:14px;font-weight:700;color:var(--primary);border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}
.toc-toggle{background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:12px;padding:4px}
.toc-toggle:hover{color:var(--primary)}
.toc-list{overflow-y:auto;max-height:calc(100vh - 200px);padding:8px 0;-webkit-overflow-scrolling:touch}
.toc-item{padding:8px 16px;font-size:13px;color:var(--text-light);cursor:pointer;transition:background .2s;border-left:3px solid transparent;line-height:1.5}
.toc-item:hover{background:rgba(139,69,19,0.06);border-left-color:var(--primary)}
.toc-item:active{background:rgba(139,69,19,0.12)}
.toc-item.active{background:rgba(139,69,19,0.1);border-left-color:var(--primary);color:var(--primary);font-weight:600}
.toc-list::-webkit-scrollbar{width:4px}
.toc-list::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}

/* 阅读内容 */
.reader-body{flex:1;padding:24px 20px;max-height:calc(100vh - 200px);overflow-y:auto;line-height:2;font-size:18px;color:var(--text);-webkit-overflow-scrolling:touch;padding-bottom:calc(20px + var(--safe-bottom))}
.reader-body p{margin-bottom:.8em;text-indent:2em}
.reader-body h3{font-size:1.2em;margin:1.5em 0 .6em;text-indent:0;color:var(--primary)}
.reader-body .verse{text-indent:0;text-align:center;margin:.3em 0}

/* 内容区域 */
.content-section{position:relative;padding-bottom:1em;margin-bottom:1em;border-bottom:1px dashed var(--border)}
.content-section:last-child{border-bottom:none}
.chapter-title{display:inline-block;margin-right:8px}
.chapter-author{font-size:.85em;font-weight:400;color:var(--text-muted)}
.poem-title{font-size:1.1em;color:var(--primary-light);margin:.8em 0 .4em;text-indent:0;font-style:italic}

/* 书签按钮 */
.bookmark-btn{position:absolute;top:4px;right:4px;width:32px;height:32px;border:none;background:none;font-size:18px;cursor:pointer;opacity:.4;transition:opacity .2s}
.bookmark-btn:hover{opacity:1}

/* 注释区域 */
.annotation-text{margin-top:.8em;padding:12px 16px;background:#FFF8E7;border-radius:8px;border-left:3px solid var(--accent-gold);font-size:.9em;line-height:1.8;color:var(--text-light)}
.annotation-text.hidden{display:none}
.annotation-label{font-size:.8em;color:var(--primary);margin-bottom:4px;font-weight:600}

/* 英译区域 — 隔行双语样式 */
.english-text{margin-top:.8em;padding:12px 16px;background:#F0F7FF;border-radius:8px;border-left:3px solid #5B9BD5;font-size:.88em;line-height:1.9;color:#2C3E50;font-style:italic}
.english-text.hidden{display:none}
.english-label{font-size:.8em;color:#3D7AB5;margin-bottom:4px;font-weight:600;font-style:normal}

/* 字号 */
.reader-body.size-sm{font-size:16px}
.reader-body.size-md{font-size:18px}
.reader-body.size-lg{font-size:21px}
.reader-body.size-xl{font-size:24px}

/* 主题 */
.reader-body.theme-light{background:var(--bg-reader);color:var(--text)}
.reader-body.theme-sepia{background:#F4ECD8;color:#5C4033}
.reader-body.theme-dark{background:#1A1A2E;color:#D4C5A9}
.reader-body.theme-dark .annotation-text{background:#2A2A4E;border-left-color:#8B7355;color:#C4A882}
.reader-body.theme-dark .english-text{background:#2A2A4E;border-left-color:#5B9BD5;color:#A0B8D0}

/* ===== 认证弹窗 ===== */
.auth-modal{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.5);z-index:2000;justify-content:center;align-items:center}
.auth-modal.open{display:flex}
.auth-panel{background:var(--bg-card);border-radius:16px;padding:32px;width:340px;max-width:90vw;box-shadow:0 20px 60px rgba(0,0,0,0.3);position:relative}
.auth-panel h2{font-size:22px;color:var(--primary);margin-bottom:20px;text-align:center}
.auth-panel input{width:100%;padding:12px 16px;border:2px solid var(--border);border-radius:8px;font-size:16px;font-family:inherit;margin-bottom:12px;outline:none;transition:border-color .2s;-webkit-appearance:none}
.auth-panel input:focus{border-color:var(--primary)}
.auth-submit{width:100%;padding:12px;background:var(--primary);color:#FFF;border:none;border-radius:8px;font-size:16px;font-family:inherit;cursor:pointer;transition:background .2s;-webkit-appearance:none}
.auth-submit:hover{background:var(--primary-light)}
.auth-switch{font-size:13px;color:var(--text-muted);text-align:center;margin-top:12px}
.auth-switch a{color:var(--primary);cursor:pointer;text-decoration:underline}
.auth-error{color:#C0392B;font-size:13px;text-align:center;margin-top:8px;display:none}
.auth-close{position:absolute;top:12px;right:12px;width:28px;height:28px;border:none;background:var(--tag-bg);border-radius:50%;font-size:14px;cursor:pointer;color:var(--text-muted)}

/* ===== 书签列表 ===== */
.bookmark-list{display:flex;flex-direction:column;gap:10px}
.bookmark-item{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:var(--bg-card);border:1px solid var(--border);border-radius:8px}
.bookmark-info{flex:1;cursor:pointer}
.bookmark-book{font-size:15px;color:var(--text);font-weight:600}
.bookmark-chapter{font-size:13px;color:var(--text-muted);margin-top:2px}
.bookmark-del{width:28px;height:28px;border:none;background:none;font-size:16px;cursor:pointer;color:var(--text-muted)}
.bookmark-del:hover{color:#C0392B}

/* ===== 移动端目录抽屉 ===== */
.mobile-toc-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.4);z-index:1100}
.mobile-toc-overlay.open{display:block}
.mobile-toc-drawer{position:fixed;left:0;top:0;bottom:0;width:75vw;max-width:300px;background:var(--bg-reader);box-shadow:4px 0 20px rgba(0,0,0,0.2);transform:translateX(-100%);transition:transform .3s ease;overflow-y:auto;-webkit-overflow-scrolling:touch;padding-bottom:var(--safe-bottom)}
.mobile-toc-overlay.open .mobile-toc-drawer{transform:translateX(0)}
.mobile-toc-header{padding:16px 20px 12px;font-size:16px;font-weight:700;color:var(--primary);border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;padding-top:calc(12px + var(--safe-top))}
.mobile-toc-header button{background:none;border:none;font-size:18px;color:var(--text-muted);cursor:pointer}
.mobile-toc-list{padding:8px 0}
.mobile-toc-list .toc-item{padding:10px 20px;font-size:15px;line-height:1.6}

/* ===== 移动端阅读器底部工具栏 ===== */
.reader-mobile-bar{display:none;position:sticky;bottom:0;background:var(--bg-card);border-top:1px solid var(--border);padding:8px 12px;padding-bottom:calc(8px + var(--safe-bottom));gap:4px;justify-content:space-around;z-index:3}
.reader-mobile-bar button{background:none;border:none;font-size:20px;padding:8px 12px;cursor:pointer;color:var(--text-muted);border-radius:8px;-webkit-appearance:none;transition:background .2s}
.reader-mobile-bar button:hover,.reader-mobile-bar button:active{background:var(--tag-bg)}
.reader-mobile-bar button.active{color:var(--primary)}

/* ===== 底部 ===== */
.footer{text-align:center;padding:30px 20px;color:var(--text-muted);font-size:13px;border-top:1px solid var(--border);margin-top:40px;padding-bottom:calc(30px + var(--safe-bottom))}

/* ===== 滚动条 ===== */
.reader-body::-webkit-scrollbar{width:6px}
.reader-body::-webkit-scrollbar-track{background:transparent}
.reader-body::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}

/* ============================================ */
/* ===== 响应式：平板（768px-1024px） ===== */
/* ============================================ */
@media(min-width:768px) and (max-width:1024px){
  .book-grid{grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px}
  .toc-panel{width:180px}
  .reader-body{padding:24px 28px}
}

/* ============================================ */
/* ===== 响应式：手机（<768px） ===== */
/* ============================================ */
@media(max-width:767px){
  .header{padding:20px 16px 16px}
  .header h1{font-size:1.6em;letter-spacing:3px}
  .user-panel{position:static;margin-top:10px;justify-content:center;flex-wrap:wrap}
  .search-bar{margin:-18px auto 0;padding:0 12px}
  .search-bar input{padding:12px 16px 12px 44px;font-size:15px}
  .search-bar .icon{left:28px}
  .nav-tabs{padding:24px 8px 8px;gap:6px;justify-content:flex-start}
  .nav-tabs button{padding:6px 14px;font-size:13px}

  .container{padding:16px 12px 40px}
  .book-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
  .book-cover{height:130px}
  .book-cover .cover-title{font-size:1.1em}
  .book-info{padding:10px 12px 14px}
  .book-info h3{font-size:14px}
  .book-info .author{font-size:12px}
  .book-info .tag{font-size:10px;padding:1px 6px}

  /* 阅读器全屏 */
  .reader-panel{border-radius:0;max-width:100%;min-height:100vh}
  .reader-overlay{padding:0}
  .reader-header{padding:12px 16px 10px;border-radius:0}
  .reader-header h2{font-size:18px}
  .reader-toolbar{padding:6px 12px;gap:8px}
  .reader-toolbar label{font-size:11px}

  /* 手机端隐藏左侧目录，用抽屉代替 */
  .toc-panel{display:none !important}
  .reader-body-wrapper{min-height:calc(100vh - 120px)}

  /* 手机端内容区 */
  .reader-body{padding:20px 16px;font-size:17px;line-height:2;max-height:none;overflow-y:visible;padding-bottom:calc(60px + var(--safe-bottom))}
  .reader-body.size-sm{font-size:15px}
  .reader-body.size-md{font-size:17px}
  .reader-body.size-lg{font-size:20px}
  .reader-body.size-xl{font-size:23px}

  /* 显示移动端工具栏 */
  .reader-mobile-bar{display:flex}

  /* 文章卡片 */
  .article-card{padding:14px 16px}
  .article-card h3{font-size:16px}
}

/* ===== 超小屏（<380px，如iPhone SE） ===== */
@media(max-width:380px){
  .header h1{font-size:1.4em}
  .book-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .book-cover{height:110px}
  .book-cover .cover-title{font-size:1em}
  .reader-toolbar{gap:6px}
  .toolbar-divider{display:none}
  .edition-btn{font-size:11px;padding:2px 6px}
}

/* ===== 横屏平板优化 ===== */
@media(min-width:768px) and (orientation:landscape){
  .reader-body{max-height:calc(100vh - 180px)}
  .toc-list{max-height:calc(100vh - 180px)}
}

/* ===== 微信Webview特殊处理 ===== */
/* 微信内字体大小会被系统放大，需重置 */
body.wx-webkit{font-size:16px !important}
.wx-webkit .reader-body{font-size:17px !important}
.wx-webkit .reader-body.size-md{font-size:17px !important}