/* ============================================================
   试卷大全 · 前台样式（基于已定稿蓝色版 UI）
   主色 #1a73e8 / 深色 #0d47a1 / 浅底 #f5f7fa / 页脚 #1f2937
   ============================================================ */
:root{
  --brand:#1a73e8;
  --brand-dark:#0d47a1;
  --brand-light:#e8f0fe;
  --bg:#f5f7fa;
  --card:#ffffff;
  --text:#1f2937;
  --text-gray:#6b7280;
  --border:#e5e7eb;
  --radius:8px;
  --shadow:0 1px 4px rgba(0,0,0,.06);
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.6}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-dark)}
img{max-width:100%}
.container{max-width:1200px;margin:0 auto;padding:0 16px}

/* ---- 顶部导航 ---- */
.header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;box-shadow:0 1px 4px rgba(0,0,0,.04)}
.header .inner{display:flex;align-items:center;height:64px;gap:12px}
.logo{display:flex;align-items:center;gap:6px;font-size:22px;font-weight:700;color:var(--brand);white-space:nowrap}
.logo img{height:60px;width:auto;object-fit:contain}
.search-box{flex:1;max-width:520px;display:flex}
.search-box input{flex:1;height:36px;border:2px solid var(--brand);border-right:none;border-radius:18px 0 0 18px;padding:0 16px;font-size:14px;outline:none}
.search-box button{width:64px;height:36px;background:var(--brand);color:#fff;border:none;border-radius:0 18px 18px 0;cursor:pointer;font-size:14px}
.search-box button:hover{background:var(--brand-dark)}
.nav-menu{display:flex;list-style:none;gap:18px;align-items:center;flex-wrap:wrap}
.nav-menu a{color:var(--text);font-size:14px;padding:4px 0;border-bottom:2px solid transparent}
.nav-menu a:hover,.nav-menu a.active{color:var(--brand);border-color:var(--brand)}

/* ---- 首页 Banner ---- */
.banner{background:linear-gradient(120deg,#0d47a1 0%,#1a73e8 55%,#64b5f6 100%);color:#fff;border-radius:12px;margin:20px 0;padding:36px 40px;display:flex;align-items:center;justify-content:space-between;overflow:hidden;position:relative}
.banner h1{font-size:28px;margin-bottom:10px;font-weight:700}
.banner p{font-size:15px;opacity:.92;margin-bottom:18px}
.banner .btn{display:inline-block;background:#fff;color:var(--brand-dark);font-weight:600;padding:10px 28px;border-radius:24px;font-size:15px;box-shadow:0 2px 8px rgba(0,0,0,.15)}
.banner .btn:hover{background:var(--brand-light)}

/* ---- 区块标题 ---- */
.section{margin:28px 0 12px;display:flex;align-items:center;flex-wrap:wrap}
.section h2{font-size:20px;font-weight:700;display:flex;align-items:center;gap:8px}
.section h2::before{content:"";width:4px;height:18px;background:var(--brand);border-radius:2px}
.section .more{margin-left:auto;font-size:15px;color:var(--text-gray)}

/* ---- 学科卡片（11 学科一行） ---- */
.subject-grid{display:grid;grid-template-columns:repeat(11,1fr);gap:8px}
.subject-card{background:#fff;border-radius:var(--radius);padding:12px 6px;text-align:center;box-shadow:var(--shadow);transition:.2s}
.subject-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(26,115,232,.15)}
.subject-card .icon{width:44px;height:44px;margin:0 auto;border-radius:12px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--ic1,#2563eb),var(--ic2,#60a5fa));box-shadow:0 3px 8px rgba(37,99,235,.18)}
.subject-card .icon svg{width:26px;height:26px}
.subject-card .name{font-weight:600;margin-top:6px;color:var(--text);font-size:13px;white-space:nowrap}
.subject-card .count{color:var(--brand);font-size:11px;margin-top:2px}
@media (max-width:960px){
  .subject-grid{grid-template-columns:repeat(auto-fill,minmax(88px,1fr));gap:10px}
}
/* 学科图标个性化配色（与效果图一致） */
.subject-card.icon-1 .icon{--ic1:#1e40af;--ic2:#3b82f6}  /* 语文-墨蓝 */
.subject-card.icon-2 .icon{--ic1:#1e3a8a;--ic2:#2563eb}  /* 数学-深蓝 */
.subject-card.icon-3 .icon{--ic1:#2563eb;--ic2:#38bdf8}  /* 英语-宝蓝 */
.subject-card.icon-4 .icon{--ic1:#6d28d9;--ic2:#8b5cf6}  /* 物理-蓝紫 */
.subject-card.icon-5 .icon{--ic1:#059669;--ic2:#34d399}  /* 化学-翠绿 */
.subject-card.icon-6 .icon{--ic1:#16a34a;--ic2:#4ade80}  /* 生物-草绿 */
.subject-card.icon-7 .icon{--ic1:#1e3a8a;--ic2:#3b82f6}  /* 政治-藏蓝 */
.subject-card.icon-8 .icon{--ic1:#92400e;--ic2:#f59e0b}  /* 历史-赭石棕 */
.subject-card.icon-9 .icon{--ic1:#0f766e;--ic2:#2dd4bf}  /* 地理-青绿 */
.subject-card.icon-10 .icon{--ic1:#d97706;--ic2:#fbbf24} /* 科学-橙黄 */
.subject-card.icon-11 .icon{--ic1:#4338ca;--ic2:#7c3aed} /* 信息技术-靛紫 */

/* ---- 年级导航（12 年级一行，组间自动撑满） ---- */
.grade-nav{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:14px 18px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.grade-group{flex:0 0 auto;display:flex;align-items:center;gap:10px}
.grade-label{flex:0 0 auto;font-weight:600;font-size:13px;color:var(--text);background:#eef5ff;border-radius:8px;padding:5px 10px;white-space:nowrap}
.grade-tag{background:#eaf2ff;color:#2563eb;font-size:13px;padding:6px 12px;border-radius:999px;white-space:nowrap;transition:.2s}
.grade-tag:hover{background:var(--brand);color:#fff}

/* ---- 试卷卡片 ---- */
.paper-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.paper-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:.2s;display:flex;flex-direction:column}
.paper-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,.08)}
.paper-card .thumb{height:120px;background:linear-gradient(135deg,#e8f0fe,#f8fafc);display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--border);color:var(--brand);font-weight:700;font-size:14px;padding:8px;text-align:center}
.paper-card .thumb img{width:100%;height:100%;object-fit:cover;object-position:center;background:#fff}
.paper-card .body{padding:12px 14px;flex:1}
.paper-card .title{font-size:14px;font-weight:600;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:42px}
.paper-card .title:hover{color:var(--brand)}
.paper-card .tags{margin-top:8px;display:flex;flex-wrap:wrap;gap:6px}
.tag{font-size:11px;padding:2px 8px;border-radius:10px;background:var(--brand-light);color:var(--brand-dark)}
.tag.gray{background:#f3f4f6;color:var(--text-gray)}
/* ---- 详情页 AI 试卷分析区块 ---- */
.ai-panel{margin-top:18px;border:1px solid var(--border);border-radius:var(--radius);background:#fff;padding:16px 18px;box-shadow:var(--shadow)}
.ai-panel .ai-head{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:700;color:var(--text);margin-bottom:12px;padding-bottom:10px;border-bottom:1px solid var(--border)}
.ai-panel .ai-head-icon{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:7px;background:linear-gradient(135deg,#7c3aed,#a855f7);color:#fff}
.ai-row{display:flex;gap:12px;margin-bottom:10px;font-size:14px;line-height:1.8}
.ai-row:last-child{margin-bottom:0}
.ai-row .ai-label{flex-shrink:0;width:72px;color:var(--text-gray);font-size:13px;padding-top:1px}
.ai-row .ai-value{flex:1;min-width:0;color:var(--text);word-break:break-word}
.ai-row .ai-title{font-weight:600;color:var(--brand-dark)}
.ai-tags{flex:1;min-width:0;display:flex;flex-wrap:wrap;gap:6px}
.ai-tag{font-size:12px;padding:2px 10px;border-radius:12px;background:var(--brand-light);color:var(--brand-dark);white-space:nowrap}
.ai-table{border-collapse:collapse;min-width:220px;font-size:13px}
.ai-table th,.ai-table td{border:1px solid var(--border);padding:5px 14px;text-align:center}
.ai-table th{background:#f8fafc;color:var(--text-gray);font-weight:600}
.ai-diff{display:flex;flex-direction:column;gap:6px;max-width:420px}
.ai-diff-item{display:flex;align-items:center;gap:10px;font-size:13px}
.ai-diff-label{flex-shrink:0;width:36px;color:var(--text-gray)}
.ai-diff-track{flex:1;height:10px;border-radius:5px;background:#f1f5f9;overflow:hidden}
.ai-diff-fill{display:block;height:100%;border-radius:5px;background:linear-gradient(90deg,#34d399,#10b981)}
.ai-diff-item:nth-child(2) .ai-diff-fill{background:linear-gradient(90deg,#fbbf24,#f59e0b)}
.ai-diff-item:nth-child(3) .ai-diff-fill{background:linear-gradient(90deg,#f87171,#ef4444)}
.ai-diff-val{flex-shrink:0;width:44px;text-align:right;color:var(--text-gray)}
/* 详情页相关/最新试卷：纯文字列表 */
.related-list{display:flex;flex-direction:column;margin-bottom:16px}
.related-item{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:9px 2px;border-bottom:1px dashed var(--border);color:var(--text);font-size:14px;transition:color .2s,background .2s}
.related-item:last-child{border-bottom:none}
.related-item:hover{background:#f8fafc;color:var(--brand-dark)}
.related-item .r-title{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.related-item:hover .r-title{color:var(--brand-dark)}
.related-item .r-tags{flex-shrink:0;display:flex;gap:6px}
.paper-card .foot{margin-top:10px;display:flex;justify-content:space-between;align-items:center;color:var(--text-gray);font-size:12px}
.paper-card .dl{background:var(--brand);color:#fff;font-size:12px;padding:3px 12px;border-radius:14px}
.paper-card .dl:hover{background:var(--brand-dark);color:#fff}

/* ---- 新版首页试卷卡片（3 列：左A4缩略图 + 右文字） ---- */
.paper-grid-new{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.pc-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:.2s;display:flex;min-height:148px}
.pc-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(26,115,232,.15)}
.pc-thumb{position:relative;flex:0 0 auto;width:104px;aspect-ratio:210/297;background:linear-gradient(135deg,#e8f0fe,#dbeafe);display:flex;align-items:center;justify-content:center;overflow:hidden;color:var(--brand);font-weight:700;font-size:13px;padding:3px;text-align:center}
.pc-thumb img{width:100%;height:100%;object-fit:cover;object-position:center;background:#fff;display:block}
.pc-badge{position:absolute;top:3px;left:3px;z-index:2;font-size:10px;line-height:1;padding:2.5px 7px;border-radius:8px;color:#fff;font-weight:600;letter-spacing:.3px;box-shadow:0 1px 3px rgba(0,0,0,.25);pointer-events:none}
/* 有「高分推荐」角标时，类型角标下移一行，避免左上角重叠 */
.pc-thumb .pc-topbadge ~ .pc-badge{top:22px}
.pc-badge-unit{background:#317ace}
.pc-badge-month{background:#ea580c}
.pc-badge-mid{background:#16a34a}
.pc-badge-final{background:#0f766e}
.pc-badge-hui{background:#7c3aed}
.pc-badge-zk{background:#dc2626}
.pc-badge-gk{background:#b91c1c}
.pc-badge-jing{background:#db2777}
.pc-badge-moni{background:#6b7280}
.pc-badge-paper{background:#276749}
.pc-thumb-fallback{line-height:1.4;word-break:break-all}
.pc-body{flex:1;min-width:0;padding:12px 14px;display:flex;flex-direction:column;gap:6px}
.pc-title{font-size:14px;font-weight:600;color:var(--text);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pc-card:hover .pc-title{color:var(--brand)}
.pc-desc{font-size:12px;color:var(--text-gray);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pc-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap}
.pc-tags{display:flex;gap:6px;min-width:0;overflow:hidden}
.pc-tag{flex-shrink:0;font-size:11px;padding:2px 9px;border-radius:11px;background:var(--brand-light);color:var(--brand-dark);white-space:nowrap}
.pc-tag-grade{background:#eef2ff;color:#4f46e5}
.pc-stat{flex-shrink:0;font-size:12px;color:var(--text-gray);white-space:nowrap}

/* 高分推荐角标（评分 ≥4.5 且 ≥5 人） */
.pc-topbadge{position:absolute;top:3px;left:3px;z-index:2;font-size:10px;line-height:1;padding:2.5px 7px;border-radius:8px;background:linear-gradient(135deg,#f59e0b,#ef4444);color:#fff;font-weight:700;letter-spacing:.3px;box-shadow:0 1px 3px rgba(0,0,0,.25);pointer-events:none}

/* 卡片评分行：金色星条 + 分数 + 人数 */
.pc-rating{display:inline-flex;align-items:center;gap:4px;margin-right:8px;vertical-align:middle}
.pc-stars{position:relative;display:inline-block;font-size:13px;line-height:1;color:#e5e7eb;letter-spacing:1px;white-space:nowrap}
.pc-stars-fill{position:absolute;left:0;top:0;overflow:hidden;color:#f59e0b;white-space:nowrap}
.pc-rating-num{font-size:12px;color:#f59e0b;font-weight:700}
.pc-rating-cnt{font-style:normal;font-size:11px;color:#9ca3af}

/* 列表页排序条：综合（评分优先）/ 评分最高 / 最新上传 / 下载最多 */
.sort-bar{display:flex;gap:6px;margin:14px 0 10px;flex-wrap:wrap}
.sort-bar a{padding:5px 14px;border-radius:16px;font-size:13px;color:#4b5563;background:#fff;border:1px solid #e5e7eb;transition:.2s}
.sort-bar a:hover{color:var(--brand);border-color:#bfdbfe}
.sort-bar a.active{background:var(--brand);color:#fff;border-color:var(--brand);font-weight:600}

/* 详情页星级评分面板 */
.rating-panel .rp-head{font-weight:700;margin-bottom:12px}
.rp-score{display:flex;align-items:baseline;gap:8px;margin-bottom:14px}
.rp-stars{position:relative;display:inline-block;font-size:22px;line-height:1;color:#e5e7eb;letter-spacing:2px}
.rp-stars-fill{position:absolute;left:0;top:0;overflow:hidden;color:#f59e0b;white-space:nowrap}
.rp-num{font-size:30px;font-weight:800;color:#f59e0b;line-height:1}
.rp-count{font-size:12px;color:#9ca3af}
.rp-dist{margin-bottom:14px}
.rp-dist-row{display:flex;align-items:center;gap:8px;margin-bottom:5px;font-size:12px;color:#4b5563}
.rp-dist-label{width:28px;flex-shrink:0;color:#f59e0b;font-weight:600}
.rp-dist-track{flex:1;height:6px;background:#f3f4f6;border-radius:3px;overflow:hidden}
.rp-dist-fill{display:block;height:100%;background:linear-gradient(90deg,#fbbf24,#f59e0b);border-radius:3px}
.rp-dist-val{width:22px;text-align:right;color:#9ca3af}
.rp-empty{color:#9ca3af;font-size:13px;margin-bottom:12px}
.rp-act{display:flex;flex-direction:column;gap:8px;align-items:flex-start}
.rp-act .btn{padding:8px 18px;font-size:13px;border-radius:8px}
.rp-pick{display:flex;align-items:center;gap:6px;background:#fffbeb;border:1px solid #fde68a;border-radius:8px;padding:8px 12px}
.rp-pick-label{font-size:12px;color:#92400e}
.rp-pick-star{font-size:22px;color:#d1d5db;cursor:pointer;transition:.15s;line-height:1}
.rp-pick-star.on,.rp-pick-star:hover{color:#f59e0b}
.rp-hint{font-size:12px;color:#16a34a}
@media (max-width:960px){.paper-grid-new{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.paper-grid-new{grid-template-columns:1fr}.pc-thumb{width:96px}}

/* ---- 列表页 ---- */
.crumbs{padding:14px 0;color:var(--text-gray);font-size:13px}
.crumbs a{color:var(--text-gray)}
.crumbs a:hover{color:var(--brand)}
.page-head{display:flex;align-items:baseline;gap:14px;margin-bottom:16px;flex-wrap:wrap}
.page-title{font-size:24px;font-weight:700;margin-bottom:4px}
.page-sub{color:var(--text-gray);font-size:13px}
.page-head .page-title{margin-bottom:0}
.page-head .page-sub{margin-bottom:0}
.filter-bar{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:14px 16px;margin-bottom:16px;display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.filter-item{display:flex;align-items:center;gap:6px}
.filter-item label{color:var(--text-gray);font-size:13px;white-space:nowrap}
.filter-item select{height:32px;border:1px solid var(--border);border-radius:6px;padding:0 8px;background:#fff;color:var(--text);outline:none}
.filter-item a{font-size:13px;color:var(--text-gray);padding:4px 8px;border-radius:6px}
.filter-item a.active{background:var(--brand-light);color:var(--brand-dark);font-weight:600}
.layout{display:grid;grid-template-columns:1fr 300px;gap:16px;align-items:start}
.paper-list{background:transparent;box-shadow:none;border-radius:0}
.paper-list .paper-grid-new{grid-template-columns:repeat(2,1fr);gap:16px;margin-bottom:18px}
.paper-list .pc-card{border:1px solid #dbeafe;box-shadow:0 1px 4px rgba(37,99,235,.06)}
.paper-list .pagination{padding:8px 0 16px}
@media (max-width:560px){.paper-list .paper-grid-new{grid-template-columns:1fr}}
.paper-row{display:flex;align-items:center;gap:14px;padding:14px 16px;border-bottom:1px solid var(--border)}
.paper-row:last-child{border-bottom:none}
.paper-row .t{width:96px;height:64px;background:linear-gradient(135deg,#e8f0fe,#f8fafc);border-radius:6px;flex-shrink:0;display:flex;align-items:center;justify-content:center;color:var(--brand);font-size:12px;font-weight:700;text-align:center;overflow:hidden}
.paper-row .t img{width:100%;height:100%;object-fit:cover;object-position:center;background:#fff}
.paper-row .info{flex:1;min-width:0}
.paper-row .info .t2{font-size:14px;font-weight:600}
.paper-row .info .t2:hover{color:var(--brand)}
.paper-row .info .meta{color:var(--text-gray);font-size:12px;margin-top:4px}
.paper-row .btn-dl{background:var(--brand);color:#fff;padding:6px 18px;border-radius:16px;font-size:13px;flex-shrink:0}
.paper-row .btn-dl:hover{background:var(--brand-dark);color:#fff}
.sidebar .card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;margin-bottom:16px}
.sidebar .card h3{font-size:15px;margin-bottom:12px;display:flex;align-items:center;gap:6px}
.sidebar .card h3::before{content:"";width:3px;height:14px;background:var(--brand);border-radius:2px}
.hot-list li{list-style:none;display:flex;gap:8px;padding:8px 0;border-bottom:1px dashed var(--border);font-size:13px}
.hot-list li:last-child{border-bottom:none}
.hot-list .no{width:20px;height:20px;border-radius:4px;background:#f3f4f6;color:var(--text-gray);text-align:center;line-height:20px;font-size:12px;flex-shrink:0}
.hot-list li:nth-child(-n+3) .no{background:var(--brand);color:#fff}
.hot-list a{color:var(--text);display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.hot-list a:hover{color:var(--brand)}
.ad-box{border:1px dashed #d1d5db;border-radius:6px;min-height:120px;display:flex;align-items:center;justify-content:center;color:#9ca3af;font-size:12px}
/* ---- M4 商业化 · 真实广告 ---- */
.ad-real{display:block;text-align:center;overflow:hidden;line-height:0}
.ad-real img{max-width:100%;border-radius:6px;display:inline-block;line-height:0}
.home-ad{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:10px;margin-bottom:18px;text-align:center}
.sidebar .ad-wrap{padding:12px}
.sidebar .ad-wrap .ad-real img{border-radius:6px}
.detail-side .ad-real{margin-bottom:14px}
.footer-ad{text-align:center;padding:10px 0 2px;background:#fff;border-top:1px solid var(--border)}

/* ---- 详情页 ---- */
.detail-layout{display:grid;grid-template-columns:1fr 320px;gap:16px;align-items:start}
.detail-main{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}
.detail-title{font-size:22px;font-weight:700;margin-bottom:10px}
.detail-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}
.detail-meta{color:var(--text-gray);font-size:13px;margin-bottom:20px}
.preview-area{border:1px solid var(--border);border-radius:8px;padding:16px;background:#fafbfc;min-height:420px;display:flex;align-items:center;justify-content:center;color:var(--text-gray);font-size:13px}
.detail-side .ad-box{margin-bottom:14px}
.dl-panel{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:16px}
.dl-panel .big-btn{display:block;text-align:center;background:var(--brand);color:#fff;padding:12px 0;border-radius:8px;font-size:16px;font-weight:600;margin-bottom:14px}
.dl-panel .big-btn:hover{background:var(--brand-dark);color:#fff}
.info-list{font-size:13px}
.info-list li{list-style:none;display:flex;padding:6px 0;border-bottom:1px dashed var(--border)}
.info-list li:last-child{border-bottom:none}
.info-list .k{color:var(--text-gray);width:84px;flex-shrink:0}
.related{margin-top:20px}

/* ---- 分页 ---- */
.pagination{display:flex;gap:6px;justify-content:center;padding:20px 0;flex-wrap:wrap;list-style:none}
.pagination a,.pagination span{display:inline-block;min-width:32px;height:32px;line-height:32px;text-align:center;border-radius:6px;background:#fff;border:1px solid var(--border);color:var(--text);font-size:13px}
.pagination a:hover{border-color:var(--brand);color:var(--brand)}
.pagination .active span{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.pagination .disabled span{color:#cbd5e1;cursor:default}
.pagination .current{background:var(--brand);border-color:var(--brand);color:#fff}

/* ---- M5 用户中心 ---- */
.auth-box{max-width:420px;margin:40px auto;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:32px 36px}
.auth-title{font-size:22px;font-weight:700;text-align:center;margin-bottom:6px}
.auth-sub{font-size:13px;color:var(--text-gray);text-align:center;margin-bottom:22px}
.form-item{margin-bottom:16px}
.form-item label{display:block;font-size:13px;color:var(--text);margin-bottom:6px;font-weight:600}
.form-item input{width:100%;height:38px;border:1px solid var(--border);border-radius:6px;padding:0 12px;font-size:14px;outline:none}
.form-item input:focus{border-color:var(--brand)}
.auth-btn{width:100%;height:40px;background:var(--brand);color:#fff;border:none;border-radius:6px;font-size:15px;font-weight:600;cursor:pointer}
.auth-btn:hover{background:var(--brand-dark)}
.auth-link{text-align:center;font-size:13px;color:var(--text-gray);margin-top:16px}
.user-layout{display:grid;grid-template-columns:260px 1fr;gap:16px;align-items:start}
.user-side .user-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;text-align:center}
.user-side .avatar{width:64px;height:64px;line-height:64px;border-radius:50%;background:var(--brand);color:#fff;font-size:26px;font-weight:700;margin:0 auto 10px;overflow:hidden}
.user-side .avatar img{width:100%;height:100%;object-fit:cover;display:block}
.user-side .u-name{font-size:16px;font-weight:700}
.user-side .u-meta{font-size:12px;color:var(--text-gray);margin:4px 0 10px}
.user-side .u-stat{font-size:13px;color:var(--text-gray);margin-bottom:14px}
.user-side .u-stat span{color:var(--brand);font-weight:700;font-size:18px}
.user-main{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;min-height:300px}
.q-grid.q-grid3{grid-template-columns:220px 1fr 1fr;}
.user-mini-card{text-align:center;align-self:stretch;display:flex;flex-direction:column;align-items:center;}
.user-mini-card .avatar{width:64px;height:64px;line-height:64px;border-radius:50%;background:var(--brand);color:#fff;font-size:26px;font-weight:700;margin:0 auto 10px;overflow:hidden;flex:none}
.user-mini-card .avatar img{width:100%;height:100%;object-fit:cover;display:block}
.user-mini-card .u-name{font-size:16px;font-weight:700;margin-bottom:2px}
.user-mini-card .u-meta{font-size:12px;color:var(--text-gray);margin-bottom:10px}
.user-mini-card .u-stat{font-size:13px;color:var(--text-gray);margin-bottom:10px}
.user-mini-card .u-stat span{color:var(--brand);font-weight:700;font-size:18px}
.user-mini-card .btn{margin-top:auto}
@media(max-width:900px){.q-grid.q-grid3{grid-template-columns:1fr 1fr}.user-mini-card{grid-column:1/-1}}
@media(max-width:768px){.q-grid.q-grid3{grid-template-columns:1fr}.user-layout{grid-template-columns:1fr}.auth-box{margin:20px auto;padding:24px 20px}}
.card-list .dl-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 18px;margin-bottom:10px;background:#f8faff;border:1px solid #eef2ff;border-radius:12px;transition:.15s}
.card-list .dl-row:hover{border-color:#c3d5f7;box-shadow:0 2px 8px rgba(30,111,255,.06)}
.card-list .dl-row:last-child{margin-bottom:0}
.dl-title{font-size:14px;font-weight:600;color:var(--text)}
.dl-title:hover{color:var(--brand)}
.dl-meta{font-size:12px;color:var(--text-gray);margin-top:4px}
.btn-dl.sm{padding:6px 14px;font-size:12px}
@media(max-width:768px){.user-layout{grid-template-columns:1fr}.auth-box{margin:20px auto;padding:24px 20px}}

/* ---- 页脚 ---- */
.footer{background:#1f2937;color:#9ca3af;margin-top:40px;padding:32px 0 20px;font-size:13px}
.footer .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:24px;margin-bottom:24px}
.footer h4{color:#fff;font-size:14px;margin-bottom:12px}
.footer a{display:block;color:#9ca3af;padding:3px 0}
.footer a:hover{color:#fff}
/* 每栏内容左右两栏排布（降低整体高度） */
.footer .col-cols{display:grid;grid-template-columns:1fr 1fr;column-gap:20px;align-content:start}
.footer .col-half{min-width:0}
.footer .copy{text-align:center;border-top:1px solid #374151;padding-top:16px;font-size:12px;white-space:nowrap}
.footer .copy a{display:inline;padding:0 4px}

/* ============================================================
   M3 移动端响应式适配
   ============================================================ */
@media (max-width: 768px){
  .header .inner{flex-wrap:wrap;height:auto;padding:10px 0;gap:10px}
  .logo{width:100%;text-align:center;justify-content:center}
  .search-box{max-width:none;order:3;width:100%}
  .nav-menu{width:100%;order:4;gap:10px;overflow-x:auto;white-space:nowrap;padding-bottom:4px}
  .banner{padding:22px 20px;flex-direction:column;align-items:flex-start;gap:14px}
  .banner h1{font-size:20px}
  .banner p{font-size:13px}
  .banner .btn{padding:8px 20px;font-size:14px}
  .cols{grid-template-columns:1fr 1fr !important}
  .detail-wrap{grid-template-columns:1fr !important}
  .paper-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr)) !important}
  .dl-panel{order:-1}
  .breadcrumb{font-size:12px}
}
@media (max-width: 480px){
  .cols{grid-template-columns:1fr !important}
  .paper-grid{grid-template-columns:1fr 1fr !important}
  .section h2{font-size:17px}
  .container{padding:0 10px}
  .search-box button{width:54px}
  .dl-btn{width:100%}
  .tags .tag{font-size:12px}
}

/* ---- 热搜词 ---- */
.hot-words{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:8px}
.hot-word{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:5px 14px;font-size:13px;color:var(--text-gray)}
.hot-word:hover{background:var(--brand-light);color:var(--brand);border-color:var(--brand)}

/* ---- PDF 在线预览 ---- */
.pdf-frame{width:100%;height:720px;border:1px solid #e5e7eb;border-radius:8px;background:#f9fafb}
@media(max-width:768px){.pdf-frame{height:480px}}
@media(max-width:480px){.pdf-frame{height:360px}}

/* ============================================================
   专题聚合页（2026-10 新版设计：横幅+Tab+精品大卡+4列卡片）
   ============================================================ */
.tp-banner{position:relative;margin:16px 0 0;padding:34px 40px;border-radius:16px;background:linear-gradient(120deg,#eaf2ff 0%,#f7fbff 60%,#ffffff 100%);display:flex;align-items:center;justify-content:space-between;gap:24px;border:1px solid #e3edff}
.tp-banner h1{font-size:30px;color:var(--brand-dark);margin:0;font-weight:700}
.tp-banner .sub{color:var(--text-gray);margin-top:8px;font-size:14px}
.tp-banner .btn{display:inline-block;background:var(--brand);color:#fff;padding:10px 26px;border-radius:24px;font-weight:600;white-space:nowrap;transition:.2s}
.tp-banner .btn:hover{background:var(--brand-dark);color:#fff}

.tp-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0 4px}
.tp-tabs a{display:inline-block;padding:6px 16px;border-radius:16px;background:#fff;border:1px solid var(--border);color:var(--text);font-size:13px;transition:.15s}
.tp-tabs a:hover{color:var(--brand);border-color:var(--brand)}
.tp-tabs a.active{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}

/* 精品推荐大卡 */
.tp-featured{position:relative;margin:20px 0 6px;border-radius:18px;overflow:hidden;display:flex;background:linear-gradient(105deg,var(--brand) 0%,#3d8bfd 55%,#6ba6ff 100%);box-shadow:0 10px 28px rgba(26,115,232,.25);transition:.2s;text-decoration:none}
.tp-featured:hover{box-shadow:0 14px 34px rgba(26,115,232,.35)}
.tp-featured .fp-left{flex:1;padding:32px 40px;color:#fff}
.tp-featured .fp-tag{display:inline-block;background:#ffb300;color:#7a4d00;font-size:12px;font-weight:700;padding:3px 12px;border-radius:12px;margin-bottom:12px}
.tp-featured .fp-title{font-size:26px;font-weight:700;margin:0 0 8px;color:#fff}
.tp-featured .fp-desc{font-size:14px;color:rgba(255,255,255,.92);margin-bottom:14px}
.tp-featured .fp-meta{font-size:13px;color:rgba(255,255,255,.82);margin-bottom:18px}
.tp-featured .fp-btn{display:inline-block;background:#fff;color:var(--brand);font-weight:700;padding:10px 30px;border-radius:24px;font-size:15px;transition:.2s}
.tp-featured:hover .fp-btn{color:var(--brand-dark)}
.tp-featured .fp-art{width:36%;min-height:190px;position:relative;background:rgba(255,255,255,.10)}
.tp-featured .fp-art .book{position:absolute;border-radius:8px;background:rgba(255,255,255,.22);box-shadow:inset 0 0 0 1px rgba(255,255,255,.25)}
.tp-featured .fp-art .book b{position:absolute;left:12px;right:12px;top:16px;bottom:16px;background:rgba(255,255,255,.16);border-radius:5px}

/* 专题小卡网格 */
.tp-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:14px 0 24px}
.tp-card{background:#fff;border-radius:14px;padding:16px;box-shadow:var(--shadow);transition:.2s;display:block;border:1px solid transparent}
.tp-card:hover{transform:translateY(-3px);box-shadow:0 8px 20px rgba(0,0,0,.08);border-color:var(--brand-light);text-decoration:none}
.tp-card .ic{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--ic1,#2563eb),var(--ic2,#60a5fa));color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;margin-bottom:10px}
.tp-card .nm{font-size:15px;font-weight:600;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tp-card .ds{font-size:12px;color:var(--text-gray);margin-top:4px;height:34px;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.tp-card .ct{font-size:12px;color:var(--brand);margin-top:8px}
@media(max-width:900px){.tp-grid{grid-template-columns:repeat(2,1fr)}.tp-featured{flex-direction:column}.tp-featured .fp-art{display:none}.tp-banner{flex-direction:column;align-items:flex-start}.tp-banner h1{font-size:24px}}

/* ============================================================
   专题详情页（2026-10 新版设计：头部蓝渐变大卡+两栏列表）
   ============================================================ */
.td-head{position:relative;margin:16px 0 6px;border-radius:18px;overflow:hidden;display:flex;background:linear-gradient(105deg,var(--brand) 0%,#3d8bfd 55%,#6ba6ff 100%);box-shadow:0 10px 28px rgba(26,115,232,.25)}
.td-head-left{flex:1;padding:32px 40px;color:#fff}
.td-tag{display:inline-block;background:#ffb300;color:#7a4d00;font-size:12px;font-weight:700;padding:3px 12px;border-radius:12px;margin-bottom:12px}
.td-title{font-size:28px;font-weight:700;margin:0 0 8px;color:#fff}
.td-desc{font-size:14px;color:rgba(255,255,255,.92);margin-bottom:12px}
.td-meta{font-size:13px;color:rgba(255,255,255,.82);margin-bottom:18px}
.td-btns{display:flex;gap:12px;align-items:center}
.td-btn-primary{display:inline-block;background:#fff;color:var(--brand);font-weight:700;padding:10px 30px;border-radius:24px;font-size:15px;transition:.2s}
.td-btn-primary:hover{color:var(--brand-dark)}
.td-btn-ghost{background:transparent;border:1px solid rgba(255,255,255,.75);color:#fff;padding:9px 26px;border-radius:24px;font-size:14px;cursor:pointer;transition:.2s}
.td-btn-ghost:hover{background:rgba(255,255,255,.15)}
.td-btn-ghost.fav-on{background:rgba(255,255,255,.22);border-color:#fff}
.td-art{width:34%;min-height:190px;position:relative;background:rgba(255,255,255,.10)}
.td-art .book{position:absolute;border-radius:8px;background:rgba(255,255,255,.22);box-shadow:inset 0 0 0 1px rgba(255,255,255,.25)}
.td-art .book b{position:absolute;left:12px;right:12px;top:16px;bottom:16px;background:rgba(255,255,255,.16);border-radius:5px}

.td-layout{display:grid;grid-template-columns:1fr 300px;gap:20px;margin:18px 0 24px}
.td-sec-title{font-size:20px;font-weight:700;color:var(--brand-dark);margin:0 0 12px;padding-left:10px;border-left:4px solid var(--brand)}
.td-list{display:flex;flex-direction:column;gap:10px}
.td-row{display:flex;align-items:center;gap:14px;background:#fff;border-radius:12px;padding:14px 18px;box-shadow:var(--shadow);transition:.2s}
.td-row:hover{box-shadow:0 6px 16px rgba(0,0,0,.08)}
.td-idx{width:30px;height:30px;border-radius:8px;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;flex-shrink:0}
.td-info{flex:1;min-width:0}
.td-name{font-size:15px;font-weight:600;color:var(--text);display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.td-name:hover{color:var(--brand)}
.td-sub{font-size:12px;color:var(--text-gray);margin-top:3px}
.td-right{display:flex;align-items:center;gap:14px;flex-shrink:0}
.td-dl{font-size:12px;color:var(--text-gray)}
.td-btn-dl{display:inline-block;background:var(--brand);color:#fff;padding:6px 20px;border-radius:18px;font-size:13px;font-weight:600;transition:.2s}
.td-btn-dl:hover{background:var(--brand-dark);color:#fff}

.td-side{display:flex;flex-direction:column;gap:14px}
.td-panel{background:#fff;border-radius:14px;padding:16px;box-shadow:var(--shadow)}
.td-panel-title{font-size:15px;font-weight:700;color:var(--text);margin-bottom:12px;padding-bottom:10px;border-bottom:1px solid var(--border)}
.td-rel{display:flex;align-items:center;gap:10px;padding:8px 6px;border-radius:10px;transition:.15s}
.td-rel:hover{background:var(--brand-light);text-decoration:none}
.td-rel-ic{width:28px;height:28px;border-radius:8px;background:linear-gradient(135deg,var(--brand),#60a5fa);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;flex-shrink:0}
.td-rel-nm{flex:1;min-width:0;font-size:13px;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.td-rel-cn{font-size:12px;color:var(--text-gray);flex-shrink:0}
.td-types{display:flex;flex-wrap:wrap;gap:8px}
.td-types a{display:inline-block;padding:5px 14px;border-radius:16px;background:var(--brand-light);color:var(--brand);font-size:12px;transition:.15s}
.td-types a:hover{background:var(--brand);color:#fff}

@media(max-width:900px){.td-layout{grid-template-columns:1fr}.td-head{flex-direction:column}.td-art{display:none}.td-title{font-size:22px}.td-right{gap:8px}.td-dl{display:none}}
/* ===== M7 下载配额与积分 ===== */
.q-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:16px;margin-bottom:20px;}
.q-card{border-radius:14px;padding:20px;box-shadow:0 2px 10px rgba(30,111,255,.06);}
.points-card{background:linear-gradient(135deg,#1e6fff,#4f8fff);color:#fff;}
.points-card .q-card-title{color:#fff;font-size:16px;letter-spacing:.5px;}
.q-card-title{font-weight:700;color:#1b2a4a;}
.q-balance{display:flex;align-items:center;gap:12px;font-size:52px;font-weight:800;margin:10px 0 4px;color:#fff;line-height:1;}
.q-balance .pt-badge{display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;color:#fff;background:linear-gradient(135deg,#34d76a,#1fb257);border-radius:20px;padding:5px 12px;box-shadow:0 2px 6px rgba(16,120,50,.35);letter-spacing:0;}
.q-actions{display:flex;gap:14px;margin-top:14px;}
.q-actions .btn{background:#fff;color:#1e6fff;border:none;font-size:14px;padding:9px 24px;border-radius:22px;font-weight:600;box-shadow:0 2px 8px rgba(15,60,150,.25);transition:.2s;}
.q-actions .btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(15,60,150,.3);}
.q-actions .btn.ghost{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.55);box-shadow:none;}
.q-actions .btn.ghost:hover{background:rgba(255,255,255,.24);transform:translateY(-1px);box-shadow:none;}
.q-note{font-size:12.5px;color:rgba(255,255,255,.92);margin-top:16px;display:flex;align-items:center;gap:6px;}
.q-note .ni{flex:0 0 auto;opacity:.9;}
.q-note2{font-size:12.5px;color:rgba(255,255,255,.82);margin-top:6px;display:flex;align-items:center;gap:6px;}
.q-note2 .ni{flex:0 0 auto;opacity:.8;}
.vip-card{background:linear-gradient(135deg,#14264a,#1e3a6e);color:#fff;border:none;position:relative;overflow:hidden;}
.vip-card::after{content:"";position:absolute;right:-30px;top:-30px;width:120px;height:120px;border-radius:50%;background:rgba(255,255,255,.05);}
.vip-head{display:flex;align-items:center;gap:6px;margin-bottom:8px;}
.vip-crown{font-size:22px;line-height:1;}
.vip-card .q-card-title{color:#fff;font-size:16px;}
.vip-card .vip-sub{font-size:13px;color:rgba(255,255,255,.8);margin:6px 0 10px;}
.vip-card .vip-expire{color:#ffd76a;font-weight:700;font-size:15px;}
.vip-card .vip-note{font-size:12px;color:rgba(255,255,255,.7);}
.vip-card .vip-badge{background:linear-gradient(135deg,#f7b500,#ff9f00);color:#fff;font-size:12px;font-weight:700;padding:2px 10px;border-radius:10px;}
.q-tabs{display:flex;gap:4px;border-bottom:2px solid #e5e7eb;margin-bottom:16px;}
.q-tabs a{padding:10px 18px;color:#6b7280;font-weight:600;border-bottom:2px solid transparent;margin-bottom:-2px;}
.q-tabs a.active{color:#1e6fff;border-bottom-color:#1e6fff;}
.q-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;font-size:13px;color:#9ca3af;}
.q-badge{display:inline-block;font-size:12px;padding:3px 10px;border-radius:10px;font-weight:600;}
.q-badge-wait{background:#fef3c7;color:#b45309;}
.q-badge-ok{background:#d1fae5;color:#047857;}
.q-badge-no{background:#fee2e2;color:#b91c1c;}
.q-point-in{color:#059669;font-weight:700;}
.q-point-out{color:#dc2626;font-weight:700;}
.q-page-sub{color:#6b7280;margin:-6px 0 18px;font-size:14px;}
.q-panel{background:#fff;border-radius:14px;padding:24px;box-shadow:0 2px 10px rgba(30,111,255,.06);}
.q-form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.q-form-item{margin-bottom:16px;}
.q-form-item label{display:block;font-size:14px;font-weight:600;color:#1b2a4a;margin-bottom:6px;}
.q-form-item label i{color:#dc2626;font-style:normal;}
.q-form-item input[type=text],.q-form-item select,.q-form-item textarea{width:100%;border:1px solid #e5e7eb;border-radius:8px;padding:9px 12px;font-size:14px;box-sizing:border-box;}
.q-upload-zone{border:2px dashed #c3d5f7;border-radius:12px;padding:28px;text-align:center;cursor:pointer;background:#f8faff;transition:.2s;}
.q-upload-zone.drag{border-color:#1e6fff;background:#eef4ff;}
.q-upload-icon{font-size:26px;color:#1e6fff;}
.q-upload-text{font-weight:600;color:#1b2a4a;margin:8px 0 4px;}
.q-upload-sub{font-size:12px;color:#9ca3af;}
.q-upload-name{margin-top:8px;font-size:13px;color:#1e6fff;word-break:break-all;}
.q-form-foot{display:flex;justify-content:space-between;align-items:center;margin-top:6px;}
.q-recharge-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.q-plan{position:relative;background:#fff;border-radius:14px;padding:24px 16px;text-align:center;border:1px solid #e5e7eb;box-shadow:0 2px 10px rgba(30,111,255,.06);}
.q-plan.hot{border-color:#1e6fff;}
.q-plan-tag{position:absolute;top:-10px;left:50%;transform:translateX(-50%);background:#f97316;color:#fff;font-size:11px;padding:2px 10px;border-radius:8px;font-weight:600;}
.q-plan-points{font-size:20px;font-weight:700;color:#1b2a4a;}
.q-plan-amount{font-size:30px;font-weight:800;color:#1e6fff;margin:6px 0 14px;}
.q-recharge-note{font-size:13px;color:#9ca3af;margin-top:14px;text-align:center;}
.q-quota-card{background:#fff;border-radius:16px;box-shadow:0 4px 20px rgba(30,111,255,.08);padding:48px 32px;text-align:center;margin-top:40px;}
.q-quota-icon{font-size:44px;}
.q-quota-title{font-size:24px;font-weight:800;color:#1b2a4a;margin:16px 0 8px;}
.q-quota-sub{color:#6b7280;margin:4px 0;}
.q-quota-actions{display:flex;justify-content:center;gap:12px;margin-top:24px;}
.q-quota-note{font-size:12px;color:#9ca3af;margin-top:16px;}
@media (max-width:768px){.q-grid,.q-form-row,.q-recharge-grid{grid-template-columns:1fr;}}