/* ===================== 考试题库程序 前台样式 ===================== */
:root{
  --blue:#1e63d0; --blue-d:#1a55b4; --blue-l:#eef5ff;
  --red:#e23c3c; --green:#2f9e5f; --orange:#e88c1a;
  --t1:#1f2a3d; --t2:#5b6b83; --t3:#93a1b6;
  --bd:#e6ecf5; --bg:#f4f7fb; --card:#fff;
  --radius:10px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font:14px/1.75 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--t1);background:var(--bg);-webkit-font-smoothing:antialiased}
a{color:var(--t1);text-decoration:none;transition:.16s}
a:hover{color:var(--blue)}
ul,ol{list-style:none}
img{max-width:100%;vertical-align:middle;border:0}
input,button,select,textarea{font-family:inherit;font-size:14px;outline:none}
.container{max-width:1200px;margin:0 auto;padding:0 16px}
.muted{color:var(--t3)}
.clearfix:after{content:"";display:block;clear:both}

/* ---------------- 头部 ---------------- */
.site-header{background:#fff;box-shadow:0 1px 0 var(--bd);position:relative;z-index:50}
.header-inner{display:flex;align-items:center;gap:22px;height:76px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,#1e63d0,#4a97ea);color:#fff;font-size:20px;font-weight:700;display:flex;align-items:center;justify-content:center}
.logo-text{font-size:19px;font-weight:700;color:var(--t1);letter-spacing:.5px}
.logo img{max-height:46px}
.top-search{flex:1;display:flex;max-width:520px;margin:0 auto;border:2px solid var(--blue);border-radius:24px;overflow:hidden;height:44px}
.top-search input{flex:1;border:0;padding:0 18px;background:#fff}
.top-search button{width:96px;border:0;background:var(--blue);color:#fff;font-size:15px;cursor:pointer;font-weight:600}
.top-search button:hover{background:var(--blue-d)}
.top-user{display:flex;align-items:center;gap:10px;flex-shrink:0}
.btn-line{border:1px solid var(--bd);border-radius:6px;padding:7px 15px;color:var(--t2);background:#fff}
.btn-line:hover{border-color:var(--blue);color:var(--blue)}
.btn-line.gray{color:var(--t3)}
.btn-solid{background:var(--blue);color:#fff;border-radius:6px;padding:8px 18px;font-weight:600}
.btn-solid:hover{background:var(--blue-d);color:#fff}
.points{color:var(--t2);font-size:13px}
.points b{color:var(--red)}

.main-nav{background:#fff;border-top:1px solid var(--bd)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:48px}
.nav-list{display:flex;gap:4px;flex-wrap:wrap}
.nav-list>li>a{display:block;padding:0 16px;line-height:48px;font-size:15.5px;color:var(--t1);font-weight:500}
.nav-list>li>a:hover,.nav-list>li>a.active{color:var(--blue);box-shadow:inset 0 -2px 0 var(--blue)}
.nav-side{font-size:13px;color:var(--t3);display:flex;gap:16px}
.nav-side a{color:var(--t2)}
.nav-side a:hover{color:var(--blue)}

.flash-msg{background:#eaf7ef;border:1px solid #c7e8d4;color:#21794a;padding:11px 18px;border-radius:8px;margin:16px 0 0;font-size:13.5px}

/* ---------------- 通用块 ---------------- */
.wrap-main{padding:22px 0 40px}
.layout{display:flex;gap:22px;align-items:flex-start}
.main-col{flex:1;min-width:0}
.side-col{width:320px;flex-shrink:0}
.card{background:var(--card);border-radius:var(--radius);box-shadow:0 2px 10px rgba(30,80,160,.05);padding:20px 22px;margin-bottom:20px}
.card-hd{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--bd);padding-bottom:12px;margin-bottom:16px}
.card-hd h3{font-size:17px;font-weight:700;padding-left:11px;border-left:4px solid var(--blue);line-height:1.1}
.card-hd h3 small{font-weight:400;font-size:12.5px;color:var(--t3);margin-left:8px}
.card-hd .more{font-size:13px;color:var(--t3)}
.card-hd .more:hover{color:var(--blue)}

/* 首页 hero */
.hero{background:linear-gradient(120deg,#1e63d0 0%,#3c86df 55%,#5aa5ee 100%);border-radius:14px;padding:38px 40px;color:#fff;margin-bottom:20px;position:relative;overflow:hidden}
.hero:after{content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;background:rgba(255,255,255,.08);border-radius:50%}
.hero h2{font-size:26px;font-weight:700;margin-bottom:10px}
.hero p{opacity:.92;font-size:14.5px;max-width:660px}
.hero-tags{margin-top:16px;display:flex;gap:8px;flex-wrap:wrap}
.hero-tags a{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);color:#fff;padding:5px 14px;border-radius:20px;font-size:13px}
.hero-tags a:hover{background:#fff;color:var(--blue)}

/* 分类宫格 */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(178px,1fr));gap:12px}
.cat-item{display:block;border:1px solid var(--bd);border-radius:10px;padding:14px 16px;background:#fbfcfe}
.cat-item:hover{border-color:var(--blue);background:var(--blue-l);transform:translateY(-2px)}
.cat-item b{display:block;font-size:15px;font-weight:600;margin-bottom:4px}
.cat-item span{font-size:12.5px;color:var(--t3);display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 试卷列表 */
.paper-list li{display:flex;align-items:flex-start;gap:14px;padding:16px 0;border-bottom:1px dashed var(--bd)}
.paper-list li:last-child{border-bottom:0}
.paper-list li:hover{background:#fafcff}
.paper-ico{width:44px;height:44px;flex-shrink:0;border-radius:9px;background:var(--blue-l);color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;text-transform:uppercase}
.paper-ico.ext-pdf{background:#fdecec;color:#d93a3a}
.paper-ico.ext-doc{background:#eaf0fd;color:#2b5fd0}
.paper-ico.ext-zip,.paper-ico.ext-rar,.paper-ico.ext-7z{background:#fff4e6;color:#d98218}
.paper-main{flex:1;min-width:0}
.paper-main h4{font-size:15.5px;font-weight:600;line-height:1.5;margin-bottom:6px}
.paper-main h4 a{color:var(--t1)}
.paper-main h4 a:hover{color:var(--blue)}
.paper-meta{font-size:12.5px;color:var(--t3);display:flex;gap:14px;flex-wrap:wrap}
.paper-meta em{font-style:normal}
.paper-desc{font-size:13px;color:var(--t2);margin-top:6px;line-height:1.6}
.paper-side{flex-shrink:0;text-align:right;display:flex;flex-direction:column;align-items:flex-end;gap:8px}
.tag{display:inline-block;font-size:12px;padding:2px 9px;border-radius:4px;background:#f0f4fa;color:var(--t2);line-height:1.6}
.tag.blue{background:var(--blue-l);color:var(--blue)}
.tag.red{background:#fdecec;color:var(--red)}
.tag.green{background:#eaf7ef;color:var(--green)}
.tag.orange{background:#fff4e6;color:var(--orange)}
.btn-down{background:var(--blue);color:#fff;border-radius:6px;padding:7px 16px;font-size:13px;white-space:nowrap}
.btn-down:hover{background:var(--blue-d);color:#fff}
.btn-down.ghost{background:#fff;border:1px solid var(--blue);color:var(--blue)}
.btn-down.ghost:hover{background:var(--blue-l)}

/* 筛选条 */
.filter-bar{display:flex;flex-direction:column;gap:0}
.filter-row{display:flex;gap:12px;padding:9px 0;border-bottom:1px dashed var(--bd);align-items:flex-start;font-size:13.5px}
.filter-row:last-child{border-bottom:0}
.filter-row .lb{width:74px;flex-shrink:0;color:var(--t3);line-height:26px}
.filter-row .opts{flex:1;display:flex;flex-wrap:wrap;gap:6px}
.filter-row .opts a{padding:2px 12px;border-radius:14px;color:var(--t2);line-height:22px}
.filter-row .opts a:hover{color:var(--blue);background:var(--blue-l)}
.filter-row .opts a.on{background:var(--blue);color:#fff}

/* 侧栏 */
.side-card{background:#fff;border-radius:var(--radius);box-shadow:0 2px 10px rgba(30,80,160,.05);padding:18px 20px;margin-bottom:20px}
.side-card h3{font-size:16px;font-weight:700;border-bottom:1px solid var(--bd);padding-bottom:11px;margin-bottom:14px;position:relative}
.side-card h3:after{content:"";position:absolute;left:0;bottom:-1px;width:48px;height:2px;background:var(--blue)}
.rank-list li{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1px dashed var(--bd);font-size:13.5px}
.rank-list li:last-child{border-bottom:0}
.rank-no{width:20px;height:20px;line-height:20px;text-align:center;border-radius:5px;background:#f0f4fa;color:var(--t3);font-size:12px;flex-shrink:0;font-weight:700}
.rank-list li:nth-child(1) .rank-no{background:#e23c3c;color:#fff}
.rank-list li:nth-child(2) .rank-no{background:#f0932b;color:#fff}
.rank-list li:nth-child(3) .rank-no{background:#e8b41a;color:#fff}
.rank-list li a{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.rank-list li .n{color:var(--t3);font-size:12px;flex-shrink:0}

.notice-list li{padding:9px 0;border-bottom:1px dashed var(--bd);font-size:13.5px;display:flex;gap:8px}
.notice-list li:last-child{border-bottom:0}
.notice-list li:before{content:"•";color:var(--blue);font-weight:700}
.notice-list li a{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 面包屑 */
.crumb{font-size:13px;color:var(--t3);padding:14px 0 4px}
.crumb a{color:var(--t2)}
.crumb span{margin:0 6px;color:#c6d0de}

/* 详情页 */
.detail-hd h1{font-size:23px;line-height:1.45;font-weight:700;margin-bottom:14px}
.detail-meta{display:flex;flex-wrap:wrap;gap:8px 22px;font-size:13px;color:var(--t2);padding-bottom:16px;border-bottom:1px solid var(--bd);margin-bottom:18px}
.detail-meta b{color:var(--t1);font-weight:600}
.file-box{display:flex;align-items:center;gap:18px;background:#f8fbff;border:1px dashed #c8dcf5;border-radius:10px;padding:18px 20px;margin-bottom:20px;flex-wrap:wrap}
.file-box .fi{flex:1;min-width:200px}
.file-box .fi p{font-size:13px;color:var(--t2)}
.file-box .fi strong{font-size:15px;display:block;margin-bottom:4px}
.price-tip{font-size:13px;color:var(--orange);margin-top:6px}
.btn-big{background:var(--blue);color:#fff;padding:12px 34px;border-radius:8px;font-size:15.5px;font-weight:600;border:0;cursor:pointer;display:inline-block}
.btn-big:hover{background:var(--blue-d);color:#fff}
.btn-big.green{background:var(--green)}
.btn-big.green:hover{background:#268a51;color:#fff}
.btn-big.gray{background:#8b9bb4}
.content-body{font-size:15px;line-height:2;color:#2c3a52;word-wrap:break-word}
.content-body p{margin-bottom:14px}
.content-body h3{font-size:17px;margin:20px 0 10px}
.content-body img{max-width:100%;height:auto}
.content-body table{width:100%;border-collapse:collapse;margin:12px 0}
.content-body table td,.content-body table th{border:1px solid var(--bd);padding:8px 10px}

/* 表格 */
.table{width:100%;border-collapse:collapse;font-size:13.5px}
.table th,.table td{padding:11px 12px;border-bottom:1px solid var(--bd);text-align:left}
.table th{background:#f7f9fc;color:var(--t2);font-weight:600;white-space:nowrap}
.table tr:hover td{background:#fafcff}
.table .num{color:var(--t2)}

/* 分页 */
.pager{margin:26px 0 6px;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.pager a,.pager span{display:inline-block;min-width:34px;height:34px;line-height:32px;text-align:center;padding:0 10px;border:1px solid var(--bd);border-radius:7px;background:#fff;color:var(--t2);font-size:13.5px}
.pager a:hover{border-color:var(--blue);color:var(--blue)}
.pager .cur{background:var(--blue);border-color:var(--blue);color:#fff;font-weight:600}
.pager .disabled{color:#c6d0de;background:#f7f9fc}
.pager .dots{border:0;background:none;color:var(--t3)}
.pager .info{margin-left:auto;border:0;background:none;color:var(--t3);font-size:13px;min-width:auto}

/* 表单 */
.form-box{background:#fff;border-radius:var(--radius);box-shadow:0 2px 10px rgba(30,80,160,.05);padding:30px 34px}
.form-box.narrow{max-width:460px;margin:0 auto}
.form-title{font-size:20px;font-weight:700;text-align:center;margin-bottom:8px}
.form-sub{text-align:center;color:var(--t3);font-size:13px;margin-bottom:24px}
.field{margin-bottom:17px}
.field label{display:block;font-size:13.5px;font-weight:600;margin-bottom:7px;color:var(--t1)}
.field label .tip{font-weight:400;color:var(--t3);font-size:12.5px;margin-left:6px}
.field input[type=text],.field input[type=password],.field input[type=email],.field input[type=number],.field input[type=search],.field select,.field textarea{width:100%;padding:10px 13px;border:1px solid #d8e0ec;border-radius:8px;background:#fbfcfe}
.field input:focus,.field select:focus,.field textarea:focus{border-color:#3f8ae0;background:#fff;box-shadow:0 0 0 3px rgba(63,138,224,.12)}
.field textarea{min-height:110px;resize:vertical;line-height:1.7}
.field .hint{font-size:12.5px;color:var(--t3);margin-top:6px}
.field-row{display:flex;gap:14px}
.field-row>.field{flex:1}
.form-btn{width:100%;background:var(--blue);color:#fff;border:0;border-radius:8px;padding:12px;font-size:15.5px;font-weight:600;cursor:pointer}
.form-btn:hover{background:var(--blue-d)}
.form-foot{text-align:center;margin-top:18px;font-size:13.5px;color:var(--t3)}
.form-foot a{color:var(--blue)}
.alert{padding:11px 15px;border-radius:8px;font-size:13.5px;margin-bottom:18px}
.alert.err{background:#fdecec;color:#c53030;border:1px solid #f8cfcf}
.alert.ok{background:#eaf7ef;color:#21794a;border:1px solid #c7e8d4}
.alert.info{background:var(--blue-l);color:#1f5fbf;border:1px solid #cfe1fb}

/* 会员中心 */
.user-layout{display:flex;gap:20px;align-items:flex-start}
.user-menu{width:200px;flex-shrink:0;background:#fff;border-radius:var(--radius);box-shadow:0 2px 10px rgba(30,80,160,.05);overflow:hidden}
.user-menu .um-hd{padding:18px;background:linear-gradient(135deg,#1e63d0,#4a97ea);color:#fff}
.user-menu .um-hd b{display:block;font-size:15px}
.user-menu .um-hd span{font-size:12.5px;opacity:.9}
.user-menu a{display:block;padding:11px 18px;font-size:14px;color:var(--t2);border-left:3px solid transparent}
.user-menu a:hover{background:#f7faff;color:var(--blue)}
.user-menu a.on{background:var(--blue-l);color:var(--blue);border-left-color:var(--blue);font-weight:600}
.user-content{flex:1;min-width:0}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin-bottom:20px}
.stat-box{background:#fff;border-radius:var(--radius);padding:18px 20px;box-shadow:0 2px 10px rgba(30,80,160,.05)}
.stat-box span{font-size:13px;color:var(--t3);display:block;margin-bottom:6px}
.stat-box b{font-size:24px;font-weight:700;color:var(--blue)}
.stat-box b.r{color:var(--red)}

/* 文章 */
.art-list li{padding:16px 0;border-bottom:1px dashed var(--bd)}
.art-list li:last-child{border-bottom:0}
.art-list h4{font-size:16px;font-weight:600;margin-bottom:6px}
.art-list p{font-size:13.5px;color:var(--t2);line-height:1.7}
.art-list .am{font-size:12.5px;color:var(--t3);margin-top:8px;display:flex;gap:16px}

/* 页脚 */
.site-footer{background:#1d2839;color:#9fb0c7;margin-top:36px;font-size:13.5px}
.footer-top{display:flex;gap:30px;padding:38px 16px 28px;flex-wrap:wrap}
.f-col{flex:1;min-width:170px}
.f-col h4{color:#fff;font-size:15px;margin-bottom:14px;font-weight:600}
.f-col ul li{padding:4px 0}
.f-col ul li a{color:#9fb0c7}
.f-col ul li a:hover{color:#fff}
.f-about p{line-height:1.9;margin-bottom:12px}
.f-contact li{color:#7f90a8}
.footer-bottom{border-top:1px solid #2b384c;padding:16px 0;text-align:center;font-size:12.5px;color:#7f90a8}
.footer-bottom p{padding:3px 0}
.f-meta span,.f-meta a{margin:0 8px;color:#7f90a8}
.f-meta a:hover{color:#fff}

.back-top{position:fixed;right:22px;bottom:30px;width:42px;height:42px;line-height:42px;text-align:center;background:#fff;border:1px solid var(--bd);border-radius:50%;color:var(--t2);box-shadow:0 4px 14px rgba(30,80,160,.12);display:none;z-index:60;font-size:16px}
.back-top.show{display:block}

/* 弹窗公告 */
.popup-mask{position:fixed;inset:0;background:rgba(20,32,52,.5);z-index:200;display:flex;align-items:center;justify-content:center;padding:20px}
.popup-box{background:#fff;border-radius:12px;max-width:520px;width:100%;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.popup-head{padding:16px 22px;font-size:16px;font-weight:700;border-bottom:1px solid var(--bd);background:#f8fbff}
.popup-body{padding:20px 22px;max-height:52vh;overflow:auto;font-size:14px;line-height:1.9}
.popup-foot{padding:14px 22px;text-align:right;border-top:1px solid var(--bd)}
.popup-foot button{background:var(--blue);color:#fff;border:0;border-radius:6px;padding:9px 24px;cursor:pointer;font-size:14px}

/* 空状态 */
.empty{text-align:center;padding:50px 20px;color:var(--t3)}
.empty .ico{font-size:40px;margin-bottom:10px}
.hl{color:var(--red);font-style:normal;font-weight:600}

/* 响应式 */
@media(max-width:980px){
  .layout{flex-direction:column}
  .side-col{width:100%}
  .header-inner{flex-wrap:wrap;height:auto;padding:12px 0;gap:12px}
  .top-search{order:3;max-width:100%;width:100%;margin:0}
  .top-user{margin-left:auto}
  .user-layout{flex-direction:column}
  .user-menu{width:100%;display:flex;flex-wrap:wrap}
  .user-menu .um-hd{width:100%}
  .user-menu a{border-left:0;border-bottom:3px solid transparent;padding:10px 14px;font-size:13.5px}
  .user-menu a.on{border-left:0;border-bottom-color:var(--blue)}
  .hero{padding:26px 22px}
  .hero h2{font-size:20px}
  .footer-top{gap:20px}
}
@media(max-width:640px){
  .logo-text{font-size:16px}
  .nav-list>li>a{padding:0 10px;font-size:14px;line-height:44px}
  .nav-list{overflow-x:auto;flex-wrap:nowrap;width:100%}
  .nav-side{display:none}
  .paper-list li{flex-wrap:wrap}
  .paper-side{width:100%;flex-direction:row;justify-content:space-between;align-items:center;margin-top:8px}
  .filter-row .lb{width:56px}
  .form-box{padding:22px 18px}
  .field-row{flex-direction:column;gap:0}
  .pager .info{display:none}
}