/* =====================================================================
   试卷资源库 · 前台样式
   前缀 tk-（试卷库），与站内 lele.css / 其他模块类名完全隔离
   设计基调：延续站内蓝色（--ba）与纸感，列表高密度，预览区做真实试卷纸
   ===================================================================== */

.tk-wrap{background:var(--bg);padding-bottom:56px}

/* ------------------------------------------------------------ 顶部搜索区 */
.tk-hero{position:relative;overflow:hidden;background:
  radial-gradient(1200px 380px at 82% -10%, rgba(59,108,246,.14), transparent 60%),
  radial-gradient(900px 300px at 8% 0%, rgba(232,131,58,.10), transparent 55%),
  linear-gradient(180deg,#fbfdff,#f2f6ff);
  border-bottom:1px solid var(--line)}
.tk-hero-in{display:grid;grid-template-columns:1fr 348px;gap:34px;padding:38px 0 34px;align-items:start}
.tk-eyebrow{display:inline-flex;align-items:center;gap:7px;height:26px;padding:0 12px;border-radius:20px;
  background:#fff;border:1px solid #d8e3fb;color:#3f5a86;font-size:12.5px;letter-spacing:.3px}
.tk-eyebrow i{width:6px;height:6px;border-radius:50%;background:#18b26b;box-shadow:0 0 0 4px rgba(24,178,107,.14)}
.tk-h1{margin:16px 0 10px;font-size:38px;line-height:1.24;font-weight:800;color:var(--ink);letter-spacing:-.6px}
.tk-h1 em{font-style:normal;color:#1f3f8f;background:linear-gradient(rgba(59,108,246,.22),rgba(59,108,246,.22)) 0 88%/100% 11px no-repeat;
  padding:0 2px;border-radius:2px}
.tk-h1-sub{color:var(--muted);font-size:14.5px;line-height:1.7;max-width:600px;margin:0 0 20px}

.tk-search{display:flex;gap:0;flex-wrap:wrap;max-width:780px;background:#fff;border:1.5px solid var(--ink);
  border-radius:10px;box-shadow:5px 5px 0 rgba(30,42,68,.10);overflow:hidden}
.tk-search input{flex:1;height:50px;border:0;padding:0 16px;font-size:15px;font-family:inherit;
  color:var(--ink);background:transparent;outline:0}
.tk-search input::placeholder{color:#9aa7bd}
.tk-search button{width:112px;border:0;background:var(--ink);color:#fff;font-size:14.5px;
  font-family:inherit;cursor:pointer;font-weight:600;letter-spacing:.5px}
.tk-search button:hover{background:#2a3b5e}

.tk-stages{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 12px}
.tk-stage{height:30px;padding:0 14px;display:inline-flex;align-items:center;border-radius:20px;
  background:#fff;border:1px solid var(--line);color:#42536e;font-size:13px;text-decoration:none;transition:.16s}
.tk-stage:hover{border-color:#b9cdf5;color:var(--ba)}
.tk-stage.on{background:var(--ink);border-color:var(--ink);color:#fff}
.tk-hot{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:12.5px;color:var(--muted)}
.tk-hot a{color:#4a5d7c;text-decoration:none;border-bottom:1px dashed #c3d2e8;padding-bottom:1px}
.tk-hot a:hover{color:var(--ba);border-color:var(--ba)}

.tk-hstats{display:flex;gap:26px;margin-top:24px}
.tk-hstat b{display:block;font-size:23px;font-weight:750;color:var(--ink);letter-spacing:-.5px;
  font-variant-numeric:tabular-nums}
.tk-hstat span{font-size:12px;color:var(--muted)}

/* 今日上新流水 */
.tk-flow{background:#fffdf7;border:1px solid #ece3cf;border-radius:12px;overflow:hidden;
  box-shadow:0 10px 26px rgba(60,48,20,.08)}
.tk-flow-h{display:flex;align-items:center;gap:8px;padding:12px 14px;border-bottom:1px dashed #e4d8bd;
  background:linear-gradient(180deg,#fff9ea,#fffdf7)}
.tk-flow-h b{font-size:13.5px;color:#5a4620}
.tk-flow-h .tk-live{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;color:#c2413a}
.tk-flow-h .tk-live i{width:6px;height:6px;border-radius:50%;background:#e0492f;animation:tkPulse 1.6s infinite}
@keyframes tkPulse{0%,100%{opacity:1;box-shadow:0 0 0 0 rgba(224,73,47,.4)}50%{opacity:.55;box-shadow:0 0 0 5px rgba(224,73,47,0)}}
.tk-flow-list{padding:6px 0;max-height:330px;overflow:hidden}
.tk-flow-row{display:flex;gap:9px;padding:9px 14px;text-decoration:none;color:inherit;transition:.15s}
.tk-flow-row:hover{background:#fff7e4}
.tk-flow-row .tk-bar{width:3px;border-radius:3px;background:#e8b06a;flex:0 0 3px}
.tk-flow-row .tk-ft{min-width:0;flex:1}
.tk-flow-row .tk-t{font-size:13px;color:#2a3a55;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;
  -webkit-box-orient:vertical;overflow:hidden}
.tk-flow-row .tk-m{font-size:11.5px;color:#a2906d;margin-top:3px}
.tk-flow-foot{padding:9px 14px;border-top:1px dashed #e4d8bd;font-size:12px;color:#8a7852;text-align:center;background:#fffdf7}

/* --------------------------------------------------------------- 通用区块 */
.tk-sec{padding:34px 0 0}
.tk-sec-h{display:flex;align-items:flex-end;gap:12px;margin-bottom:16px}
.tk-sec-h .tk-t1{font-size:20px;font-weight:750;color:var(--ink);letter-spacing:-.3px;display:flex;align-items:center;gap:9px}
.tk-sec-h .tk-t1::before{content:"";width:4px;height:17px;border-radius:2px;background:var(--ba)}
.tk-sec-h .tk-t2{font-size:12.5px;color:var(--muted);padding-bottom:2px}
.tk-sec-h .tk-more{margin-left:auto;font-size:12.5px;color:#5d7291;text-decoration:none}
.tk-sec-h .tk-more:hover{color:var(--ba)}

/* 学科九宫格 */
.tk-subj-grid{display:grid;grid-template-columns:repeat(9,1fr);gap:10px}
.tk-subj{display:flex;flex-direction:column;align-items:center;gap:7px;padding:14px 6px 12px;background:#fff;
  border:1px solid var(--line);border-radius:10px;text-decoration:none;transition:.18s;position:relative;overflow:hidden}
.tk-subj:hover{transform:translateY(-2px);border-color:#c7d8f7;box-shadow:0 8px 20px rgba(40,70,140,.1)}
.tk-subj i{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;color:#fff;
  font-style:normal;font-size:15px;font-weight:700}
.tk-subj b{font-size:13.5px;color:var(--ink);font-weight:600}
.tk-subj span{font-size:11px;color:var(--muted)}

/* 专区卡：两列等高，条件 + 年级 + 样本统一结构 */
.tk-zone-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;align-items:stretch}
/* 专区数量为奇数时，最后一张横跨两列，避免右下留空位 */
.tk-zone-grid .tk-zone:last-child:nth-child(odd){grid-column:1/-1}
.tk-zone{position:relative;display:flex;flex-direction:column;padding:16px 18px 14px;border-radius:12px;background:#fff;
  border:1px solid var(--line);text-decoration:none;color:inherit;overflow:hidden;transition:.2s}
.tk-zone:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(30,55,110,.12);border-color:#c7d8f7}
.tk-zhead{display:flex;align-items:center;gap:10px;text-decoration:none;color:inherit}
.tk-zone .tk-zico{width:36px;height:36px;flex:0 0 36px;border-radius:9px;display:grid;place-items:center;color:#fff;
  font-size:15px;font-weight:700}
.tk-zhead-tx{min-width:0}
.tk-zhead-tx b{display:block;font-size:15.5px;color:var(--ink);font-weight:700;line-height:1.3}
.tk-zone .tk-zslog{font-size:12px;color:var(--muted);margin-top:2px;display:block}
.tk-znum{margin-left:auto;text-align:right;flex:0 0 auto}
.tk-zone .tk-zcount{font-variant-numeric:tabular-nums;font-weight:750;font-size:16px;color:#3f5a86;display:block;line-height:1.2}
.tk-znum span{font-size:10.5px;color:#98a7bd}
.tk-zrow-line{display:flex;align-items:flex-start;gap:10px;margin-top:12px}
.tk-zlab{flex:0 0 52px;font-size:11px;color:#98a7bd;line-height:24px;letter-spacing:.3px}
.tk-zconds,.tk-zgrades{display:flex;flex-wrap:wrap;gap:6px;min-width:0}
.tk-zcond{height:24px;padding:0 10px;display:inline-flex;align-items:center;border-radius:6px;
  background:#f2f6fd;font-size:12px;color:#3d5a8f;border:1px solid #e3ecfb}
.tk-zgrade{height:24px;padding:0 10px;display:inline-flex;align-items:center;gap:4px;border-radius:6px;
  background:#fff;border:1px solid var(--line);font-size:12px;color:#42536e;text-decoration:none;transition:.15s}
.tk-zgrade:hover{border-color:#b9cdf5;color:var(--ba);background:#f6faff}
.tk-zgrade em{font-style:normal;font-size:10.5px;color:#98a7bd}
.tk-zsamples{display:flex;flex-direction:column;gap:2px;min-width:0;flex:1}
.tk-zs{display:flex;align-items:baseline;gap:8px;padding:4px 0;text-decoration:none;min-width:0}
.tk-zs .tk-zs-t{font-size:12.5px;color:#2a3a55;line-height:1.45;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}
.tk-zs .tk-zs-m{flex:0 0 auto;font-size:10.5px;color:#98a7bd}
.tk-zs:hover .tk-zs-t{color:var(--ba)}
.tk-znone{font-size:12px;color:#b0bccd;line-height:24px}
.tk-zenter{margin-top:10px;padding-top:10px;border-top:1px dashed var(--line);font-size:12.5px;
  color:#1f4fc4;text-decoration:none;font-weight:600}
.tk-zenter:hover{color:#1743a8}
.tk-zenter::after{content:" →"}
.tk-zone.feature{background:linear-gradient(120deg,#101c33,#1d3459 62%,#243d68);border:0;color:#dbe6f8}
.tk-zone.feature .tk-zhead-tx b{color:#fff}
.tk-zone.feature .tk-zslog{color:#9fb4d6}
.tk-zone.feature .tk-zcount{color:#ffd79a}
.tk-zone.feature .tk-znum span{color:#8ba0c4}
.tk-zone.feature .tk-zcond{background:rgba(255,255,255,.09);color:#cfdcf2;border-color:rgba(255,255,255,.16)}
.tk-zone.feature .tk-zgrade{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.18);color:#cfdcf2}
.tk-zone.feature .tk-zgrade em{color:#8ba0c4}
.tk-zone.feature .tk-zgrade:hover{background:rgba(255,255,255,.14);color:#fff}
.tk-zone.feature .tk-zs .tk-zs-t{color:#cfdcf2}
.tk-zone.feature .tk-zs .tk-zs-m{color:#8ba0c4}
.tk-zone.feature .tk-zs:hover .tk-zs-t{color:#fff}
.tk-zone.feature .tk-zlab{color:#7e93b8}
.tk-zone.feature .tk-zenter{color:#ffd79a;border-top-color:rgba(255,255,255,.16)}
.tk-zone.feature::after{content:"题";position:absolute;right:-8px;bottom:-30px;font-size:120px;
  color:rgba(255,255,255,.04);font-weight:800;pointer-events:none}

/* 搜索框内专区下拉 */
.tk-search select{width:132px;height:50px;border:0;border-right:1px solid #e6ebf3;padding:0 8px 0 14px;
  font-size:13.5px;font-family:inherit;color:var(--ink);background:#f7f9fd;outline:0;cursor:pointer;
  appearance:none;-webkit-appearance:none;
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%238494ac' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 10px center}
.tk-search select:hover{background-color:#eef3fb}

/* 列表页工具栏的专区下拉 */
.tk-zsel{display:inline-flex;align-items:center;gap:6px}
.tk-zsel>span{font-size:12.5px;color:#8494ac}
.tk-zsel select{height:30px;padding:0 26px 0 10px;border:1px solid var(--line);border-radius:6px;
  font-size:12.5px;font-family:inherit;color:#42536e;background:#fff;outline:0;cursor:pointer;
  appearance:none;-webkit-appearance:none;
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%238494ac' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 9px center}
.tk-zsel select:hover{border-color:#b9cdf5}
.tk-zsel select:focus{border-color:#7ea4ee}

/* 双栏：最新 + 榜单 */
.tk-two{display:grid;grid-template-columns:1.32fr 1fr;gap:16px;align-items:stretch}
.tk-panel{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.tk-panel-h{display:flex;align-items:center;gap:9px;padding:13px 16px;border-bottom:1px solid var(--line)}
.tk-panel-h b{font-size:14.5px;color:var(--ink);font-weight:700}
.tk-panel-h .tk-sub{font-size:12px;color:var(--muted)}
.tk-panel-h .tk-more{margin-left:auto;font-size:12.5px;color:#5d7291;text-decoration:none}

/* 试卷行（列表通用） */
.tk-row{display:flex;gap:12px;padding:13px 16px;border-bottom:1px solid #eef2f9;text-decoration:none;color:inherit;transition:.14s}
.tk-row:last-child{border-bottom:0}
.tk-row:hover{background:#f8fbff}
.tk-row-i{width:38px;flex:0 0 38px;text-align:center}
.tk-row-i b{display:block;font-size:15px;font-weight:800;color:#c2cede;font-variant-numeric:tabular-nums;line-height:1.1}
.tk-row-i b.top{color:#e0492f}
.tk-row-b{min-width:0;flex:1}
.tk-row-t{display:flex;align-items:center;gap:7px}
.tk-row-t a{font-size:13.8px;color:#23334e;text-decoration:none;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;flex:1}
.tk-row-t a:hover{color:var(--ba)}
.tk-row-m{display:flex;flex-wrap:wrap;gap:7px;margin-top:6px;font-size:11.5px;color:#8494ac;align-items:center}
.tk-row-m span{white-space:nowrap}
.tk-row-m .tk-dot{width:3px;height:3px;border-radius:50%;background:#c9d5e6;display:inline-block}
.tk-row-a{display:flex;align-items:center;gap:8px;flex:0 0 auto}

/* 标签 */
.tk-tag{display:inline-flex;align-items:center;height:20px;padding:0 7px;border-radius:4px;
  font-size:11px;background:#eef3fd;color:#41639b;white-space:nowrap}
.tk-tag.new{background:#fdecea;color:#c2413a;font-weight:600}
.tk-tag.ans{background:#e9f7f0;color:#0f8f6f}
.tk-tag.hot{background:#fff3e3;color:#b26a00}
.tk-tag.gray{background:#f0f2f6;color:#7b8aa5}

/* 按钮 */
.tk-btn{display:inline-flex;align-items:center;justify-content:center;height:34px;padding:0 16px;
  border-radius:8px;border:1px solid var(--line);background:#fff;color:#2f4059;font-size:13px;
  text-decoration:none;cursor:pointer;font-family:inherit;transition:.15s;white-space:nowrap}
.tk-btn:hover{border-color:#b9cdf5;color:var(--ba)}
.tk-btn.pri{background:var(--ba);border-color:var(--ba);color:#fff;font-weight:600}
.tk-btn.pri:hover{background:#2a58d8;border-color:#2a58d8;color:#fff}
.tk-btn.dark{background:var(--ink);border-color:var(--ink);color:#fff}
.tk-btn.dark:hover{background:#2a3b5e;color:#fff}
.tk-btn.sm{height:29px;padding:0 11px;font-size:12px;border-radius:7px}
.tk-btn:disabled,.tk-btn.off{opacity:.5;cursor:not-allowed}
.tk-btn.ghost{background:transparent}

/* --------------------------------------------------------------- 列表页 */
.tk-list-head{background:#fff;border-bottom:1px solid var(--line);padding:16px 0}
.tk-crumb{font-size:12.5px;color:var(--muted);margin-bottom:10px}
.tk-crumb a{color:#5d7291;text-decoration:none}
.tk-crumb a:hover{color:var(--ba)}
.tk-chips{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.tk-chip{height:28px;padding:0 12px;display:inline-flex;align-items:center;border-radius:6px;
  background:#f4f7fd;border:1px solid transparent;color:#42536e;font-size:12.5px;text-decoration:none}
.tk-chip:hover{background:#e9f0fd;color:var(--ba)}
.tk-chip.on{background:#e5eefd;border-color:#b9cdf5;color:#1f4fc4;font-weight:600}

.tk-body{display:grid;grid-template-columns:236px 1fr;gap:18px;padding-top:18px;align-items:start}
.tk-side{background:#fff;border:1px solid var(--line);border-radius:12px;padding:6px 0;position:sticky;top:80px}
.tk-side-g{padding:10px 14px 12px;border-bottom:1px dashed var(--line)}
.tk-side-g:last-child{border-bottom:0}
.tk-side-t{font-size:12px;color:#8494ac;margin-bottom:8px;letter-spacing:.3px}
.tk-side-opts{display:flex;flex-wrap:wrap;gap:6px}
.tk-side-opts a{font-size:12.5px;color:#42536e;text-decoration:none;padding:3px 9px;border-radius:5px;background:#f5f8fd}
.tk-side-opts a:hover{background:#e9f0fd;color:var(--ba)}
.tk-side-opts a.on{background:var(--ba);color:#fff;font-weight:600}
.tk-side-opts a em{font-style:normal;color:#98a7bd;font-size:11px;margin-left:3px}
.tk-side-opts a.on em{color:#cfe0ff}

.tk-main{min-width:0}
.tk-bar{display:flex;align-items:center;gap:12px;padding:11px 14px;background:#fff;
  border:1px solid var(--line);border-radius:10px;margin-bottom:12px;flex-wrap:wrap}
.tk-bar .tk-count{font-size:13px;color:#42536e}
.tk-bar .tk-count b{color:var(--ink);font-size:15px;font-variant-numeric:tabular-nums}
.tk-sorts{display:flex;gap:4px;margin-left:auto}
.tk-sort{padding:5px 11px;border-radius:6px;font-size:12.5px;color:#5d7291;text-decoration:none}
.tk-sort:hover{background:#f2f6fd}
.tk-sort.on{background:#e5eefd;color:#1f4fc4;font-weight:600}

.tk-rows{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.tk-rows .tk-row{padding:15px 16px}
.tk-pager{display:flex;align-items:center;justify-content:center;gap:6px;padding:18px 0}
.tk-pager a,.tk-pager span{min-width:32px;height:32px;padding:0 9px;display:inline-flex;align-items:center;
  justify-content:center;border-radius:7px;background:#fff;border:1px solid var(--line);color:#42536e;
  font-size:13px;text-decoration:none;font-variant-numeric:tabular-nums}
.tk-pager a:hover{border-color:#b9cdf5;color:var(--ba)}
.tk-pager .on{background:var(--ba);border-color:var(--ba);color:#fff;font-weight:600}
.tk-pager .dis{color:#b6c1d2;background:#f7f9fc}

.tk-empty{background:#fff;border:1px solid var(--line);border-radius:12px;padding:60px 20px;text-align:center;color:var(--muted)}
.tk-empty b{display:block;color:var(--ink);font-size:15px;margin-bottom:6px}

/* --------------------------------------------------------------- 详情页 */
.tk-detail{display:grid;grid-template-columns:1fr 320px;gap:18px;padding-top:18px;align-items:start}
.tk-paper{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.tk-paper-h{padding:18px 20px 14px;border-bottom:1px solid var(--line)}
.tk-paper-h h1{margin:0 0 10px;font-size:21px;line-height:1.42;color:var(--ink);font-weight:750;letter-spacing:-.2px}
.tk-meta-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:14px 0 0}
.tk-meta-grid div{background:#fff;padding:9px 12px}
.tk-meta-grid small{display:block;font-size:11.5px;color:#8494ac;margin-bottom:2px}
.tk-meta-grid b{font-size:13px;color:#2a3a55;font-weight:600;word-break:break-all}

/* 试卷纸预览 */
.tk-preview{position:relative;padding:26px 30px 76px;background:
  repeating-linear-gradient(0deg,rgba(210,196,170,.16) 0 1px,transparent 1px 26px),
  linear-gradient(180deg,#fffdf7,#fffdf7)}
.tk-preview::before{content:"";position:absolute;left:64px;top:0;bottom:0;width:0;
  border-left:1px dashed #e3d6bd}
.tk-paper-title{text-align:center;margin-bottom:18px;position:relative}
.tk-paper-title b{display:block;font-size:17px;color:#2a2418;letter-spacing:.5px;
  font-family:"Songti SC","SimSun",serif}
.tk-paper-title span{font-size:12px;color:#9a8b6d}
.tk-para{position:relative;font-size:13.6px;line-height:2.05;color:#332c20;margin-bottom:9px;
  font-family:"Songti SC","SimSun",serif;text-align:justify}
.tk-para.hl{background:rgba(59,108,246,.05)}
.tk-watermark{position:absolute;inset:0;pointer-events:none;overflow:hidden;
  background-image:repeating-linear-gradient(-32deg,rgba(120,100,70,.055) 0 1px,transparent 1px 74px)}
.tk-watermark span{position:absolute;font-size:12px;color:rgba(120,100,70,.13);white-space:nowrap;
  transform:rotate(-32deg)}
.tk-fade{position:absolute;left:0;right:0;bottom:0;height:88px;
  background:linear-gradient(180deg,rgba(255,253,247,0),#fffdf7 72%);pointer-events:none}
.tk-block{position:relative;margin:0 30px 22px;padding:20px;border:1px dashed #d9cbae;border-radius:10px;
  background:#fffaf0;text-align:center}
.tk-block b{display:block;color:#6b5830;font-size:14.5px;margin-bottom:6px}
.tk-block p{margin:0 0 12px;font-size:12.5px;color:#93835f;line-height:1.7}

/* 右侧下载卡 */
.tk-aside{display:flex;flex-direction:column;gap:14px;position:sticky;top:80px}
.tk-dl{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;box-shadow:0 8px 24px rgba(30,55,110,.06)}
.tk-dl-who{display:flex;align-items:center;gap:9px;padding-bottom:12px;border-bottom:1px dashed var(--line)}
.tk-dl-who i{width:32px;height:32px;border-radius:8px;background:#eef3fd;color:#41639b;display:grid;
  place-items:center;font-style:normal;font-size:12px;font-weight:700}
.tk-dl-who b{display:block;font-size:13.5px;color:var(--ink)}
.tk-dl-who span{font-size:11.5px;color:var(--muted)}
.tk-dl-num{display:flex;align-items:baseline;gap:6px;margin:14px 0 6px}
.tk-dl-num b{font-size:26px;font-weight:800;color:var(--ink);font-variant-numeric:tabular-nums;letter-spacing:-.5px}
.tk-dl-num span{font-size:12.5px;color:var(--muted)}
.tk-dl-bar{height:7px;background:#eef2f9;border-radius:20px;overflow:hidden;margin-bottom:14px}
.tk-dl-bar i{display:block;height:100%;background:linear-gradient(90deg,#3b6cf6,#6f96ff);border-radius:20px}
.tk-dl .tk-btn{width:100%;height:42px;font-size:14.5px;border-radius:9px}
.tk-dl-note{font-size:11.5px;color:#8b99b0;line-height:1.8;margin-top:10px}
.tk-dl-alt{display:flex;gap:8px;margin-top:9px}
.tk-dl-alt .tk-btn{height:33px;font-size:12.5px;flex:1}

/* 权益对照 */
.tk-benefit{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.tk-benefit-h{padding:12px 14px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:8px}
.tk-benefit-h b{font-size:13.5px;color:var(--ink)}
.tk-benefit table{width:100%;border-collapse:collapse;font-size:12px}
.tk-benefit th{background:#f8fafd;color:#7b8aa5;font-weight:600;padding:7px 8px;text-align:left;border-bottom:1px solid var(--line)}
.tk-benefit td{padding:7px 8px;border-bottom:1px solid #f0f4fa;color:#42536e;font-variant-numeric:tabular-nums}
.tk-benefit tr.cur td{background:#eef5ff;color:#1f4fc4;font-weight:600}
.tk-benefit tr:last-child td{border-bottom:0}

/* 相似试卷 */
.tk-sim{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.tk-sim-h{padding:12px 14px;border-bottom:1px solid var(--line);font-size:13.5px;font-weight:700;color:var(--ink)}
.tk-sim a{display:block;padding:9px 14px;border-bottom:1px solid #f0f4fa;text-decoration:none;color:#2a3a55;font-size:12.5px;line-height:1.5}
.tk-sim a:last-child{border-bottom:0}
.tk-sim a:hover{background:#f8fbff;color:var(--ba)}
.tk-sim a span{display:block;font-size:11px;color:#8b99b0;margin-top:2px}

/* 会员横幅 */
.tk-vip{display:flex;align-items:center;gap:18px;margin-top:30px;padding:20px 24px;border-radius:12px;
  background:linear-gradient(100deg,#1a2740,#25406b 58%,#33507f);color:#dce7f8;position:relative;overflow:hidden}
.tk-vip::after{content:"卷";position:absolute;right:18px;bottom:-40px;font-size:130px;font-weight:800;
  color:rgba(255,255,255,.045)}
.tk-vip b{font-size:16px;color:#fff;display:block;margin-bottom:4px}
.tk-vip p{margin:0;font-size:12.5px;color:#a8bcdb;line-height:1.6}
.tk-vip .tk-btn{margin-left:auto;background:#e8833a;border-color:#e8833a;color:#fff;height:38px;padding:0 22px}
.tk-vip .tk-btn:hover{background:#d97327;color:#fff}

/* 骨架/加载 */
.tk-skel{padding:40px 0;text-align:center;color:var(--muted);font-size:13px}
.tk-spin{display:inline-block;width:18px;height:18px;border:2px solid #d5e1f5;border-top-color:var(--ba);
  border-radius:50%;animation:tkSpin .8s linear infinite;vertical-align:-3px;margin-right:8px}
@keyframes tkSpin{to{transform:rotate(360deg)}}

/* 下载成功提示条 */
.tk-toast{position:fixed;left:50%;bottom:36px;transform:translateX(-50%) translateY(14px);z-index:9999;
  background:#101c33;color:#fff;padding:11px 20px;border-radius:9px;font-size:13px;opacity:0;
  transition:.24s;pointer-events:none;max-width:80vw;text-align:center}
.tk-toast.on{opacity:1;transform:translateX(-50%) translateY(0)}

/* 响应式 */
@media(max-width:1180px){
  .tk-hero-in{grid-template-columns:1fr}
  .tk-flow{order:2}
  .tk-subj-grid{grid-template-columns:repeat(5,1fr)}
  .tk-zone-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:980px){
  .tk-body{grid-template-columns:1fr}
  .tk-side{position:static}
  .tk-detail{grid-template-columns:1fr}
  .tk-aside{position:static}
  .tk-two{grid-template-columns:1fr}
  .tk-h1{font-size:29px}
}
@media(max-width:640px){
  .tk-subj-grid{grid-template-columns:repeat(3,1fr)}
  .tk-zone-grid{grid-template-columns:1fr}
  .tk-search select{width:100%;height:42px;border-right:0;border-bottom:1px solid #e6ebf3}
  .tk-search input{width:100%;flex:1 1 auto}
  .tk-search button{flex:1}
  .tk-zrow-line{flex-direction:column;gap:6px}
  .tk-zlab{line-height:1.2}
  .tk-hstats{gap:16px;flex-wrap:wrap}
  .tk-meta-grid{grid-template-columns:repeat(2,1fr)}
  .tk-preview{padding:20px 16px 0}
  .tk-preview::before{left:36px}
}

/* =====================================================================
   试题篮 / 组卷中心（题库增值功能）
   ===================================================================== */
.tk-bk{display:grid;grid-template-columns:1fr 336px;gap:22px;padding:22px 0 10px}
.tk-bk-card{background:#fff;border:1px solid var(--line);border-radius:13px;overflow:hidden}
.tk-bk-h{display:flex;align-items:center;gap:10px;padding:14px 18px;border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#fbfdff,#f5f8ff)}
.tk-bk-h b{font-size:15.5px;color:var(--ink)}
.tk-bk-h .tk-bk-cnt{font-size:12.5px;color:var(--muted)}
.tk-bk-h .tk-bk-ops{margin-left:auto;display:flex;gap:8px}
.tk-bk-body{padding:6px 0}
.tk-bk-row{display:flex;align-items:flex-start;gap:11px;padding:12px 18px;border-bottom:1px dashed #eef2f9;transition:.14s}
.tk-bk-row:last-child{border-bottom:0}
.tk-bk-row:hover{background:#f8fbff}
.tk-bk-row .tk-bk-chk{width:17px;height:17px;flex:0 0 17px;margin-top:2px;accent-color:var(--ba);cursor:pointer}
.tk-bk-row .tk-bk-idx{width:26px;flex:0 0 26px;font-size:12.5px;font-weight:700;color:#9aa7bd;
  text-align:center;line-height:21px;font-variant-numeric:tabular-nums}
.tk-bk-row .tk-bk-mn{flex:1;min-width:0}
.tk-bk-row .tk-bk-t{font-size:14px;color:var(--ink);line-height:1.55;text-decoration:none;display:block;
  overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.tk-bk-row .tk-bk-t:hover{color:var(--ba)}
.tk-bk-row .tk-bk-m{display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin-top:5px;font-size:12px;color:var(--muted)}
.tk-bk-row .tk-bk-x{flex:0 0 auto;border:0;background:transparent;color:#b6c1d4;font-size:16px;line-height:1;
  cursor:pointer;padding:2px 4px;border-radius:5px;font-family:inherit}
.tk-bk-row .tk-bk-x:hover{color:#d33b30;background:#fff1f0}

.tk-bk-empty{padding:56px 20px;text-align:center;color:var(--muted)}
.tk-bk-empty b{display:block;font-size:15px;color:var(--ink);margin-bottom:8px}

/* 右侧组卷面板 */
.tk-bk-side{position:sticky;top:78px;align-self:start;display:flex;flex-direction:column;gap:16px}
.tk-bk-panel{background:#fff;border:1px solid var(--line);border-radius:13px;padding:16px 16px 18px;
  box-shadow:0 8px 22px rgba(38,60,110,.06)}
.tk-bk-panel h4{margin:0 0 12px;font-size:14px;color:var(--ink)}
.tk-bk-field{margin-bottom:12px}
.tk-bk-field small{display:block;font-size:12px;color:var(--muted);margin-bottom:6px}
.tk-bk-input{width:100%;height:38px;border:1px solid #dbe4f2;border-radius:8px;padding:0 11px;
  font-size:13.5px;font-family:inherit;color:var(--ink);background:#fbfdff;outline:0;box-sizing:border-box}
.tk-bk-input:focus{border-color:var(--ba);background:#fff;box-shadow:0 0 0 3px rgba(47,107,246,.10)}
.tk-bk-sum{display:flex;align-items:baseline;gap:6px;padding:10px 12px;border-radius:9px;
  background:#f5f8ff;border:1px solid #e2eafb;margin-bottom:12px}
.tk-bk-sum b{font-size:22px;font-weight:750;color:#1f4fc4;font-variant-numeric:tabular-nums;line-height:1}
.tk-bk-sum span{font-size:12.5px;color:#5a6d8c}
.tk-bk-note{font-size:11.5px;line-height:1.75;color:#8b99b0;margin-top:10px}
.tk-bk-btns{display:flex;flex-direction:column;gap:8px}
.tk-bk-btns .tk-btn{width:100%;height:40px}
.tk-bk-tip{background:#fffaf0;border:1px solid #f2e3c4;border-radius:10px;padding:12px 14px;
  font-size:12px;line-height:1.8;color:#7a5f2c}
.tk-bk-tip b{color:#5a4620}

/* 组卷中心列表 */
.tk-cz-list{padding:8px 0}
.tk-cz-item{display:flex;align-items:center;gap:14px;padding:14px 18px;border-bottom:1px dashed #eef2f9}
.tk-cz-item:last-child{border-bottom:0}
.tk-cz-item .tk-cz-mn{flex:1;min-width:0}
.tk-cz-item .tk-cz-t{font-size:14.5px;font-weight:600;color:var(--ink);margin-bottom:5px;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tk-cz-item .tk-cz-m{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:12px;color:var(--muted)}
.tk-cz-item .tk-cz-a{display:flex;gap:6px;flex:0 0 auto}
.tk-cz-papers{padding:0 18px 14px;background:#fafcff;border-bottom:1px dashed #eef2f9}
.tk-cz-papers a{display:flex;gap:8px;padding:7px 0;font-size:12.5px;color:#43567a;text-decoration:none;
  border-bottom:1px dashed #edf1f8}
.tk-cz-papers a:last-child{border-bottom:0}
.tk-cz-papers a:hover{color:var(--ba)}
.tk-cz-papers i{flex:0 0 22px;color:#9aa7bd;font-style:normal;font-variant-numeric:tabular-nums}

@media(max-width:980px){
  .tk-bk{grid-template-columns:1fr}
  .tk-bk-side{position:static}
}

/* 无法提取文字的老格式试卷：给一块说明占位，别让用户看到空白 */
.tk-notext{padding:52px 34px;text-align:center;background:
  repeating-linear-gradient(180deg,#fffdf7 0 27px,#f6f1e4 27px 28px)}
.tk-notext b{display:block;font-size:17px;color:#3a3020;margin-bottom:10px}
.tk-notext p{margin:0 auto;max-width:440px;font-size:13px;line-height:2;color:#7a6a4a}

/* =====================================================================
   资料下载 · 模块统一页签（学科试卷 / 赛事真题）
   题库首页、试卷列表、资料下载三处共用，让两类资源看起来是一个模块
   ===================================================================== */
.zx-tabs{background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:6}
.zx-tabs-in{display:flex;align-items:center;gap:16px;padding:14px 20px;flex-wrap:wrap}
.zx-tabs-lead{display:flex;align-items:baseline;gap:10px;min-width:0;flex-wrap:wrap}
.zx-tabs-lead b{font-size:16.5px;color:#1f2b45;letter-spacing:-.2px}
.zx-tabs-lead span{font-size:12.5px;color:#8494ac}
.zx-tablist{display:flex;gap:6px;margin-left:auto;background:#f4f7fd;border:1px solid #e8eefa;border-radius:13px;padding:4px}
.zx-tab{display:flex;align-items:center;gap:9px;padding:7px 14px 7px 9px;border-radius:10px;color:#54637f;transition:.16s}
.zx-tab-ico{width:28px;height:28px;border-radius:8px;background:#fff;border:1px solid #e3ecfb;display:grid;place-items:center;font-size:12.5px;font-weight:700;color:#3b6cf6;flex-shrink:0;transition:.16s}
.zx-tab-tx{display:flex;flex-direction:column;line-height:1.3;min-width:0}
.zx-tab-tx b{font-size:13.5px;font-weight:600}
.zx-tab-tx em{font-style:normal;font-size:11.5px;color:#93a1b9}
.zx-tab:hover{background:#fff;color:#1f4fc4}
.zx-tab.on{background:#fff;color:#1f4fc4;box-shadow:0 8px 20px -14px rgba(59,108,246,.75),inset 0 0 0 1px #dbe6fb}
.zx-tab.on .zx-tab-ico{background:linear-gradient(135deg,#3b6cf6,#6d8ffb);border-color:transparent;color:#fff}
.zx-tab.on .zx-tab-tx em{color:#7f92b3}
@media(max-width:760px){
  .zx-tabs-in{padding:12px 12px;gap:10px}
  .zx-tabs-lead span{display:none}
  .zx-tablist{margin-left:0;width:100%}
  .zx-tab{flex:1;justify-content:center;padding:7px 8px}
  .zx-tab-tx em{display:none}
}