/* OMG移动端 CSS v2.4 — 奶油白 + 鹅黄 + 薄荷绿（绘本童趣风） */
:root {
  --primary: #FDB827;           /* 鹅黄（主色） */
  --primary-dark: #E8A71B;
  --primary-light: #FFF1C7;     /* 鹅黄浅（标签底） */
  --mint: #2EC4B6;              /* 薄荷绿（辅色：清新） */
  --mint-light: #D9F5F0;
  --coral: #FF6B6B;             /* 珊瑚红（强调色备用） */
  --bg: #FFE9A8;                /* 深蛋黄背景（温暖浓郁） */
  --card: #FFFFFF;
  --text: #1A1A1A;
  --text2: #6B6B6B;
  --text3: #B0B0B0;
  --border: #F0EBE0;            /* 温暖的浅边框 */
  --shadow: 0 4px 16px rgba(180,140,60,.08);  /* 带一点点黄的暖阴影 */
  --shadow-md: 0 10px 32px rgba(180,140,60,.12);
  --shadow-lg: 0 20px 48px rgba(180,140,60,.16);
  --radius: 18px;
  --radius-lg: 24px;
  --radius-sm: 12px;
  --tab-h: 60px;
  --safe-b: env(safe-area-inset-bottom, 0px);
}
* { margin:0; padding:0; box-sizing:border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Helvetica Neue', sans-serif; background: var(--bg); color: var(--text); -webkit-tap-highlight-color: transparent; -webkit-font-smoothing: antialiased; overflow-x: hidden; }

.page { display:none; min-height:100vh; padding-bottom: calc(var(--tab-h) + var(--safe-b) + 16px); }
.page.active { display:block; }
.page-header { display:flex; align-items:center; gap:10px; padding:12px 16px; position:sticky; top:0; background:var(--bg); z-index:10; }
.page-header h2 { font-size:1.1rem; font-weight:700; flex:1; }
.btn-back { width:36px; height:36px; border-radius:50%; background:var(--card); border:none; box-shadow:var(--shadow); display:flex; align-items:center; justify-content:center; font-size:1.2rem; cursor:pointer; flex-shrink:0; }

/* Tab */
.tab-bar { position:fixed; bottom:0; left:0; right:0; height:calc(var(--tab-h)+var(--safe-b)); padding-bottom:var(--safe-b); background:var(--card); border-top:1px solid var(--border); display:flex; z-index:100; }
.tab-item { flex:1; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:4px; font-size:0.68rem; font-weight:500; color:var(--text2); cursor:pointer; border:none; background:none; transition:color .15s; }
.tab-item.active { color:var(--primary); font-weight:600; }
.tab-item .tab-icon { width:24px; height:24px; stroke:currentColor; fill:none; stroke-width:2; stroke-linecap:round; stroke-linejoin:round; transition:transform .15s; }
.tab-item.active .tab-icon { transform:scale(1.08); }
#page-detail.active ~ .tab-bar { display:none; }

/* Hero */
.hero { text-align:center; padding:44px 24px 24px; position:relative; overflow:hidden; }
.hero::before { content:''; position:absolute; top:-10%; left:50%; transform:translateX(-50%); width:280px; height:280px; background:radial-gradient(circle, rgba(253,184,39,.18) 0%, rgba(253,184,39,.05) 40%, transparent 70%); pointer-events:none; z-index:0; }
.hero::after { content:''; position:absolute; bottom:-30%; right:-20%; width:240px; height:240px; background:radial-gradient(circle, rgba(46,196,182,.12) 0%, transparent 70%); pointer-events:none; z-index:0; }
.hero > * { position:relative; z-index:1; }
.hero .hero-logo { width:100px; height:100px; border-radius:50%; box-shadow:0 0 0 10px rgba(253,184,39,.08), 0 0 0 20px rgba(253,184,39,.04), 0 14px 34px rgba(253,184,39,.28); object-fit:cover; margin-bottom:20px; }
.hero h1 { font-size:2rem; font-weight:800; color:var(--text); letter-spacing:-0.03em; line-height:1.1; }
.hero h1 .hero-accent { color:var(--primary); font-style:italic; }
.hero p { color:var(--text2); font-size:0.92rem; margin-top:10px; font-weight:500; letter-spacing:.02em; }

/* Search (奶油底 + 胶囊) */
.search-bar { padding:8px 20px 28px; }
.search-wrap { position:relative; }
.search-wrap::before { content:''; position:absolute; left:20px; top:50%; transform:translateY(-50%); width:18px; height:18px; background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236B6B6B' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E") center/contain no-repeat; pointer-events:none; opacity:.8; z-index:1; }
.search-bar input { width:100%; padding:16px 20px 16px 48px; border:1px solid var(--border); border-radius:999px; background:var(--card); box-shadow:var(--shadow); font-size:0.92rem; font-weight:500; color:var(--text); transition:all .2s; }
.search-bar input::placeholder { color:var(--text2); font-weight:400; }
.search-bar input:focus { outline:none; border-color:var(--primary); box-shadow:0 0 0 4px rgba(253,184,39,.18), 0 6px 20px rgba(180,140,60,.12); }
.search-input-full { flex:1; padding:10px 16px; border:1px solid var(--border); border-radius:999px; font-size:0.88rem; background:var(--card); color:var(--text); }
.search-btn { padding:10px 18px; background:var(--primary); color:var(--text); border:none; border-radius:999px; font-size:0.85rem; font-weight:700; flex-shrink:0; box-shadow:0 4px 14px rgba(253,184,39,.38); }

/* 一级分类（奶油底 + 圆角大卡 + 鹅黄渐变图标） */
.top-cats { padding:8px 20px 20px; display:flex; flex-direction:column; gap:14px; }
.top-cat-card { background:var(--card); border-radius:var(--radius-lg); padding:18px; box-shadow:var(--shadow); cursor:pointer; display:flex; align-items:center; gap:16px; border:1px solid var(--border); transition:all .18s; }
.top-cat-card:active { transform:scale(.985); box-shadow:0 2px 8px rgba(180,140,60,.06); }
.top-cat-card .tc-icon { width:64px; height:64px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:1.75rem; flex-shrink:0; background:linear-gradient(135deg, #FFD469 0%, var(--primary) 100%); }
.top-cat-card .tc-info { flex:1; min-width:0; }
.top-cat-card .tc-name { font-size:1.1rem; font-weight:700; color:var(--text); letter-spacing:-0.01em; }
.top-cat-card .tc-count { font-size:0.82rem; color:var(--text2); margin-top:4px; font-weight:500; }
.top-cat-card .tc-arrow { color:var(--text3); font-size:1.4rem; font-weight:300; flex-shrink:0; padding-right:4px; }

/* 二级分类网格 */
.cats-grid { padding:0 16px; display:grid; grid-template-columns:1fr 1fr; gap:12px; }
.cat-card { background:var(--card); border-radius:var(--radius); padding:20px 16px; text-align:center; box-shadow:var(--shadow); cursor:pointer; transition:transform .15s; }
.cat-card:active { transform:scale(.97); }
.cat-card .cc-icon { font-size:1.8rem; margin-bottom:8px; }
.cat-card .cc-name { font-size:0.9rem; font-weight:700; }
.cat-card .cc-count { font-size:0.72rem; color:var(--text2); margin-top:4px; }

/* 资料列表 */
.res-list { padding:0 16px; display:flex; flex-direction:column; gap:10px; }
.res-card { background:var(--card); border-radius:var(--radius); box-shadow:var(--shadow); display:flex; overflow:hidden; cursor:pointer; transition:transform .15s; }
.res-card:active { transform:scale(.98); }
.res-card .rc-cover { width:80px; height:100px; object-fit:cover; flex-shrink:0; background:#F0F0F0; }
.res-card .rc-info { flex:1; padding:12px; min-width:0; }
.res-card .rc-title { font-size:0.85rem; font-weight:600; line-height:1.3; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.res-card .rc-code { display:inline-block; padding:2px 8px; margin-right:6px; background:linear-gradient(135deg,#FF8A4F,#FF5E62); color:#fff; font-size:.68rem; font-weight:700; border-radius:6px; letter-spacing:.5px; vertical-align:middle; box-shadow:0 2px 6px rgba(255,94,98,.28); }
.res-card .rc-meta { font-size:0.72rem; color:var(--text2); margin-top:6px; }
.res-card .rc-tags { display:flex; gap:4px; flex-wrap:wrap; margin-top:6px; }
.res-card .rc-tag { padding:3px 9px; border-radius:6px; font-size:0.7rem; font-weight:600; background:#FFEFCE; color:#8B5A00; }

/* 详情页 */
#page-detail { padding-bottom:0; background:#000; }
.detail-topbar { position:fixed; top:0; left:0; right:0; z-index:50; display:flex; align-items:center; gap:8px; padding:10px 14px; background:linear-gradient(180deg,rgba(0,0,0,.6),transparent); }
.detail-topbar .btn-back { background:rgba(255,255,255,.2); color:#fff; backdrop-filter:blur(8px); }
.detail-nav-title { flex:1; color:#fff; font-size:.78rem; font-weight:600; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.detail-counter { color:rgba(255,255,255,.7); font-size:.75rem; flex-shrink:0; }
.detail-body { width:100%; min-height:100vh; overflow-y:auto; overflow-x:hidden; -webkit-overflow-scrolling:touch; }
.detail-info { background:var(--card); padding:60px 16px 16px; border-bottom:8px solid var(--bg); }

/* 封面卡片：左右留边、可水平滑动切换 book */
.detail-cover-wrap { position:relative; padding:18px 24px 8px; background:var(--bg); }
.detail-cover-card { position:relative; background:#fff; border:1px solid var(--border); border-radius:14px; box-shadow:0 6px 18px rgba(0,0,0,.08); overflow:hidden; touch-action:pan-y; will-change:transform; }
.detail-cover-card img { width:100%; display:block; }
.detail-cover-card.swiping { transition:none; }
.detail-cover-card.animating { transition:transform .28s ease-out, opacity .28s ease-out; }

/* 浮在封面图上的提示标签：明显颜色 + 白文字 */
.cover-hint { position:absolute; top:50%; transform:translateY(-50%); padding:8px 14px; font-size:.78rem; font-weight:600; color:#fff; background:linear-gradient(135deg,#FF6B9D,#C04FE0); border:none; border-radius:18px; box-shadow:0 4px 14px rgba(192,79,224,.4); cursor:pointer; z-index:10; letter-spacing:.5px; -webkit-tap-highlight-color:transparent; transition:transform .15s, box-shadow .15s; }
.cover-hint:active { transform:translateY(-50%) scale(.92); }
.cover-hint.left { left:14px; background:linear-gradient(135deg,#4FA3FF,#3B6BD9); box-shadow:0 4px 14px rgba(59,107,217,.45); }
.cover-hint.right { right:14px; }
.cover-hint.disabled { opacity:.3; filter:grayscale(.5); pointer-events:none; }

/* 浮在封面图底部的「看内容 ↓」提示 */
.cover-scroll-tip { position:absolute; left:50%; transform:translateX(-50%); bottom:18px; padding:8px 18px; font-size:.78rem; font-weight:600; color:#fff; background:rgba(0,0,0,.65); border-radius:18px; backdrop-filter:blur(6px); z-index:10; animation:bounce 1.4s infinite; pointer-events:none; }
@keyframes bounce { 0%,100%{transform:translate(-50%,0)} 50%{transform:translate(-50%,5px)} }

/* 内页：每张独立卡片,上下左右带边距 */
.detail-content { padding:8px 24px 40px; background:var(--bg); display:flex; flex-direction:column; gap:14px; }
.detail-content .page-card { background:#fff; border:1px solid var(--border); border-radius:12px; overflow:hidden; box-shadow:0 2px 8px rgba(0,0,0,.05); }
.detail-content .page-card img { width:100%; display:block; }
.detail-content .pc-empty { padding:40px 12px; text-align:center; color:var(--text3); font-size:.82rem; }
.detail-info .di-title { font-size:1.1rem; font-weight:700; line-height:1.4; }
.detail-info .di-desc { font-size:.82rem; color:var(--text2); line-height:1.6; margin-top:8px; white-space:pre-line; }
.detail-info .di-meta { display:flex; flex-wrap:wrap; gap:8px; margin-top:12px; }
.detail-info .di-badge { padding:4px 10px; border-radius:8px; font-size:.72rem; background:#FFEFCE; color:#8B5A00; font-weight:600; }
.detail-info .di-title { display:flex; align-items:center; gap:8px; flex-wrap:wrap; }
.detail-info .di-code { display:inline-flex; align-items:center; padding:4px 10px; background:linear-gradient(135deg,#FF8A4F,#FF5E62); color:#fff; font-size:.78rem; font-weight:700; border-radius:8px; box-shadow:0 2px 8px rgba(255,94,98,.4); letter-spacing:.5px; flex-shrink:0; }
.detail-info .di-badge.di-rtype { background:#FFEFD5; color:#C57100; font-weight:600; }
.detail-info .di-tags { display:flex; flex-wrap:wrap; gap:6px; margin-top:10px; }
.detail-info .di-tag { padding:3px 10px; border-radius:12px; font-size:.7rem; background:#FFEFCE; color:#8B5A00; border:1px solid #F0D58A; font-weight:600; }

/* 折叠区开关 */
.detail-info .di-fold-toggle { display:flex; align-items:center; justify-content:space-between; width:100%; margin-top:14px; padding:8px 12px; background:#F4F7FB; border:1px solid var(--border); border-radius:10px; font-size:.78rem; color:var(--primary); font-weight:600; cursor:pointer; }
.detail-info .di-fold-toggle:active { background:#E8EFF8; }
.detail-info .di-fold { margin-top:10px; padding-top:10px; border-top:1px dashed var(--border); }
.detail-info .di-fold[hidden] { display:none; }
.detail-info .di-section-title { font-size:.78rem; font-weight:700; color:var(--text); margin-top:14px; margin-bottom:6px; }
.detail-info .di-books { list-style:none; padding:0; margin:0; }
.detail-info .di-book { display:flex; flex-direction:column; gap:2px; padding:8px 10px; border-radius:8px; background:#FAFBFC; margin-bottom:6px; border:1px solid var(--border); }
.detail-info .di-book .dib-name { font-size:.82rem; color:var(--text); word-break:break-all; }
.detail-info .di-book .dib-meta { font-size:.7rem; color:var(--text3); }

/* 搜索结果按书展示 */
.search-summary { padding:8px 14px; font-size:.78rem; color:var(--text2); }
.book-card { background:var(--card); border-radius:var(--radius); box-shadow:var(--shadow); display:flex; overflow:hidden; cursor:pointer; margin-bottom:10px; transition:transform .15s; }
.book-card:active { transform:scale(.98); }
.book-card .bc-cover { width:80px; height:108px; object-fit:cover; flex-shrink:0; background:#F0F0F0; }
.book-card .bc-info { flex:1; padding:10px 12px; min-width:0; display:flex; flex-direction:column; gap:4px; }
.book-card .bc-name { font-size:.86rem; font-weight:600; color:var(--text); line-height:1.3; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.book-card .bc-from { font-size:.74rem; color:var(--text2); display:flex; align-items:center; gap:6px; flex-wrap:wrap; }
.book-card .bc-from .bc-from-title { color:var(--primary); font-weight:600; }
.book-card .bc-code { display:inline-block; padding:3px 8px; background:linear-gradient(135deg,#FF8A4F,#FF5E62); color:#fff; font-size:.7rem; font-weight:700; border-radius:6px; box-shadow:0 2px 6px rgba(255,94,98,.35); letter-spacing:.5px; }
.book-card .bc-meta { font-size:.7rem; color:var(--text3); margin-top:auto; }
.swipe-arrow { position:fixed; top:50%; z-index:40; width:32px; height:56px; display:flex; align-items:center; justify-content:center; font-size:1.3rem; color:rgba(255,255,255,.5); background:rgba(0,0,0,.3); border-radius:6px; pointer-events:none; opacity:0; transition:opacity .2s; transform:translateY(-50%); }
.swipe-arrow.left { left:4px; }
.swipe-arrow.right { right:4px; }
.swipe-arrow.show { opacity:1; }
.detail-body.swiping { transition:none; }
.detail-body.animating { transition:transform .3s ease-out; }

/* Toast */
.toast { position:fixed; top:50%; left:50%; transform:translate(-50%,-50%) scale(.8); background:rgba(0,0,0,.75); color:#fff; padding:12px 24px; border-radius:12px; font-size:.85rem; z-index:999; opacity:0; transition:all .3s; pointer-events:none; }
.toast.show { opacity:1; transform:translate(-50%,-50%) scale(1); }

.loading { text-align:center; padding:60px 20px; color:var(--text3); font-size:.85rem; }
.loading::before { content:''; display:block; width:28px; height:28px; margin:0 auto 12px; border:3px solid var(--border); border-top-color:var(--primary); border-radius:50%; animation:spin .8s linear infinite; }
@keyframes spin { to { transform:rotate(360deg); } }