/* ==========================================================================
   信息发布平台样式
   ========================================================================== */
:root{
  --if-primary:#7C4DFF;--if-primary-d:#5A2FD8;--if-primary-l:#F3EFFF;
  --if-line:#E8E3F7;--if-text:#1B1733;--if-text2:#5A5478;--if-sub:#7A7495;
  --if-radius:14px;--if-shadow:0 1px 3px rgba(45,27,105,.05),0 6px 20px rgba(45,27,105,.05);
  --if-shadow-h:0 8px 18px rgba(45,27,105,.11),0 16px 36px rgba(45,27,105,.08);
}
body{background:#F5F4FA}

/* 顶部横幅 */
.if-hero{position:relative;overflow:hidden;background:linear-gradient(120deg,#5A2FD8,#7C4DFF 55%,#8B5CFF);color:#fff;padding:44px 0}
.if-hero::before,.if-hero::after{content:'';position:absolute;border-radius:50%;background:rgba(255,255,255,.09)}
.if-hero::before{width:260px;height:260px;right:-80px;top:-110px}
.if-hero::after{width:170px;height:170px;right:110px;bottom:-110px;background:rgba(255,255,255,.06)}
.if-hero .container{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.if-hero h1{margin:0;font-size:30px;font-weight:800;letter-spacing:.5px}
.if-hero p{margin:9px 0 0;opacity:.9;font-size:14.5px}
.if-hero-stat{display:flex;gap:26px;flex-wrap:wrap}
.if-hero-stat div{text-align:center}
.if-hero-stat b{display:block;font-size:26px;font-weight:800;line-height:1.2}
.if-hero-stat span{font-size:12.5px;opacity:.85}

/* 分类导航条 */
.if-catnav{background:#fff;border-radius:var(--if-radius);box-shadow:var(--if-shadow);padding:14px 18px;margin:-26px 0 22px;position:relative;z-index:2;display:flex;gap:9px;flex-wrap:wrap;align-items:center}
.if-catnav .lb{font-size:13px;color:var(--if-sub);margin-right:4px;font-weight:600}
.if-catnav a{padding:8px 18px;border-radius:999px;font-size:13.5px;color:var(--if-text2);background:#F7F6FF;font-weight:600;transition:all .18s}
.if-catnav a:hover{background:var(--if-primary-l);color:var(--if-primary-d)}
.if-catnav a.on{background:linear-gradient(135deg,#8B5CFF,var(--if-primary-d));color:#fff;box-shadow:0 4px 12px rgba(47,158,82,.28)}

/* 分类区块 */
.if-block{margin-bottom:34px}
.if-block-hd{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.if-block-hd h2{margin:0;font-size:19px;font-weight:800;color:var(--if-text);display:flex;align-items:center;gap:10px}
.if-block-hd h2::before{content:'';width:5px;height:19px;border-radius:3px;background:linear-gradient(#8B5CFF,var(--if-primary-d))}
.if-block-hd .cnt{font-size:12.5px;color:var(--if-sub);font-weight:500}
.if-block-hd a.more{font-size:13px;color:var(--if-primary);font-weight:700}
.if-block-hd a.more:hover{color:var(--if-primary-d);text-decoration:underline}

/* 信息卡片 */
.if-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.if-card{display:block;background:#fff;border:1px solid var(--if-line);border-radius:var(--if-radius);overflow:hidden;box-shadow:var(--if-shadow);transition:transform .2s,box-shadow .2s,border-color .2s}
.if-card:hover{transform:translateY(-4px);box-shadow:var(--if-shadow-h);border-color:#CFC4FF}
.if-card .thumb{height:158px;background:#F3F2F9;overflow:hidden}
.if-card .thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .35s}
.if-card:hover .thumb img{transform:scale(1.06)}
.if-card .bd{padding:13px 15px 15px}
.if-card .bd h3{margin:0;font-size:14px;font-weight:600;line-height:1.55;color:var(--if-text);height:44px;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.if-card .bd .meta{margin-top:9px;font-size:12px;color:var(--if-sub);display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap}

/* 分类页布局 */
.if-crumb{background:#fff;border-bottom:1px solid var(--if-line);padding:14px 0;font-size:13px;color:var(--if-sub)}
.if-crumb .container{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.if-crumb a{color:var(--if-sub)}
.if-crumb a:hover{color:var(--if-primary-d)}
.if-crumb b{color:var(--if-text)}
.if-crumb i{font-style:normal;opacity:.45}
.if-side{background:#fff;border:1px solid var(--if-line);border-radius:var(--if-radius);box-shadow:var(--if-shadow);padding:16px;margin-bottom:18px}
.if-side h4{margin:0 0 12px;font-size:15px;font-weight:800;color:var(--if-text);padding-bottom:10px;border-bottom:2px solid var(--if-primary-l)}
.if-side ul{margin:0;padding:0;list-style:none}
.if-side li a{display:flex;justify-content:space-between;align-items:center;padding:10px 12px;border-radius:9px;font-size:13.5px;color:var(--if-text2);font-weight:600}
.if-side li a:hover{background:var(--if-primary-l);color:var(--if-primary-d)}
.if-side li a.on{background:linear-gradient(135deg,#8B5CFF,var(--if-primary-d));color:#fff}
.if-side li a em{font-style:normal;font-size:11.5px;opacity:.75}
.if-panel{background:#fff;border:1px solid var(--if-line);border-radius:var(--if-radius);box-shadow:var(--if-shadow);padding:20px 22px;margin-bottom:18px}
.if-panel-hd{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:14px;margin-bottom:6px;border-bottom:1px solid var(--if-line);flex-wrap:wrap}
.if-panel-hd h2{margin:0;font-size:17px;font-weight:800;color:var(--if-text)}

/* 分类页列表条目 */
.if-row{display:flex;gap:15px;padding:16px 0;border-bottom:1px solid var(--if-line)}
.if-row:last-child{border-bottom:none}
.if-row .thumb{width:168px;height:118px;flex:0 0 168px;border-radius:11px;overflow:hidden;background:#F3F2F9}
.if-row .thumb img{width:100%;height:100%;object-fit:cover;display:block}
.if-row .bd{flex:1;min-width:0;display:flex;flex-direction:column}
.if-row .bd h3{margin:0 0 8px;font-size:15.5px;font-weight:700;line-height:1.5;color:var(--if-text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.if-row .bd h3 a:hover{color:var(--if-primary-d)}
.if-row .bd p{margin:0;font-size:13px;color:var(--if-text2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.if-row .bd .meta{margin-top:auto;padding-top:10px;font-size:12.5px;color:var(--if-sub);display:flex;gap:16px;flex-wrap:wrap}
.if-row .bd .meta b{color:var(--if-primary-d);font-weight:700}

/* 详情页 */
.if-article{background:#fff;border:1px solid var(--if-line);border-radius:var(--if-radius);box-shadow:var(--if-shadow);padding:30px 34px}
.if-article h1{margin:0 0 14px;font-size:23px;font-weight:800;line-height:1.5;color:var(--if-text)}
.if-article .meta{display:flex;gap:18px;flex-wrap:wrap;font-size:13px;color:var(--if-sub);padding-bottom:16px;border-bottom:1px solid var(--if-line);margin-bottom:20px}
.if-article .meta b{color:var(--if-primary-d)}
.if-article .content{font-size:14.5px;line-height:2;color:#2E2A4A;word-break:break-word}
.if-article .content img{max-width:100%;height:auto;border-radius:9px;margin:8px 0}
.if-article .content p{margin:0 0 12px}

/* 空状态 / 分页 */
.if-empty{text-align:center;padding:64px 20px;color:var(--if-sub)}
.if-empty .ic{font-size:46px;margin-bottom:12px;opacity:.8}
.if-page{text-align:center;margin-top:20px}
.if-page .pagination{display:inline-flex;gap:6px;flex-wrap:wrap;justify-content:center;padding:0;margin:0}
.if-page .pagination li a,.if-page .pagination li span{display:block;padding:8px 14px;border:1px solid var(--if-line);border-radius:9px;color:var(--if-text2);font-size:13px;background:#fff}
.if-page .pagination li a:hover{border-color:var(--if-primary);color:var(--if-primary-d);background:var(--if-primary-l)}
.if-page .pagination li.active span{background:linear-gradient(135deg,#8B5CFF,var(--if-primary-d));border-color:transparent;color:#fff;font-weight:700}

/* 发布入口 */
.if-cta{background:linear-gradient(120deg,var(--if-primary-l),#fff);border:1px solid #DCD2FF;border-radius:var(--if-radius);padding:20px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:26px}
.if-cta b{font-size:15.5px;color:var(--if-primary-d);display:block}
.if-cta span{font-size:13px;color:var(--if-text2)}
.if-btn{display:inline-block;padding:10px 24px;border-radius:10px;background:linear-gradient(135deg,#8B5CFF,var(--if-primary-d));color:#fff;font-size:13.5px;font-weight:700;box-shadow:0 4px 14px rgba(47,158,82,.26);transition:transform .18s,box-shadow .18s}
.if-btn:hover{transform:translateY(-1px);box-shadow:0 8px 20px rgba(47,158,82,.34);color:#fff}
.if-btn-ghost{background:#fff;color:var(--if-primary-d);border:1px solid #DCD2FF;box-shadow:none}
.if-btn-ghost:hover{background:var(--if-primary-l);color:var(--if-primary-d);box-shadow:none}

@media (max-width:1199px){ .if-grid{grid-template-columns:repeat(3,1fr)} }
@media (max-width:991px){
  .if-grid{grid-template-columns:repeat(2,1fr)}
  .if-hero h1{font-size:24px}
  .if-article{padding:22px 18px}
}
@media (max-width:575px){
  .if-grid{grid-template-columns:1fr}
  .if-row{flex-direction:column}
  .if-row .thumb{width:100%;height:170px;flex:none}
  .if-hero{padding:30px 0}
  .if-hero-stat{gap:18px}
}