/* =========================================================================
   唬哈优选 · 前台视觉主题（PC 宽屏 / 学习用品）
   设计说明：与参考站（gaode.cn）完全独立，采用「靛蓝学术 + 荧光橙高亮」
   配色与字标式分类图标，全宽首屏 Banner + 1280 宽屏栅格。
   ========================================================================= */

:root{
    --ink:#16203a; --primary:#2f54eb; --primary-d:#1d3bb8;
    --accent:#ff7a18; --accent-soft:#fff1e6;
    --paper:#eef2fb; --card:#ffffff; --line:#e3e8f3;
    --muted:#6b7689; --radius:14px; --wrap:1280px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;
    background:var(--paper); color:var(--ink); font-size:14px; line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.wrap{width:var(--wrap);margin:0 auto}
.del,.card-price del{color:var(--muted);text-decoration:line-through;font-size:12px;margin-left:6px}

/* 顶部工具条 */
.topbar{background:var(--ink);color:#c9d2e8;font-size:12px}
.topbar-inner{display:flex;justify-content:space-between;height:34px;align-items:center}
.topbar-right a{color:#c9d2e8;margin-left:16px}
.topbar-right a:hover{color:#fff}
.topbar b{color:#fff}

/* 主头部（去掉与分类导航之间的分隔线） */
.masthead{background:var(--card)}
.masthead-inner{display:flex;align-items:center;gap:28px;height:84px}
.logo{display:flex;align-items:center;gap:12px}
.logo-mark{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,var(--primary),#5b7bff);
    color:#fff;font-size:24px;font-weight:800;display:flex;align-items:center;justify-content:center}
.logo-text{font-size:24px;font-weight:800;color:var(--ink);line-height:1;display:flex;flex-direction:column}
.logo-text i{font-style:normal;font-size:11px;letter-spacing:2px;color:var(--primary);font-weight:600}
.search{flex:1;display:flex;max-width:560px;height:44px;border:2px solid var(--primary);border-radius:24px;overflow:hidden}
.search input{flex:1;border:0;outline:0;padding:0 18px;font-size:14px}
.search button{border:0;background:var(--primary);color:#fff;padding:0 26px;font-size:15px;cursor:pointer}
.search button:hover{background:var(--primary-d)}
.masthead-tip{color:var(--muted);font-size:13px;white-space:nowrap}

/* 分类导航（无边框，用柔和投影与页面分隔，上下留足呼吸感） */
.catnav{background:var(--card);box-shadow:0 6px 16px rgba(22,32,58,.06);position:relative;z-index:2}
.catnav-inner{display:flex;gap:8px;height:78px;align-items:center}
.catnav-item{flex:1;display:flex;flex-direction:column;align-items:center;gap:6px;padding:8px 0;border-radius:10px;transition:.2s}
.catnav-item:hover{background:var(--paper)}
.cat-badge{width:42px;height:42px;border-radius:12px;color:#fff;font-size:18px;font-weight:800;
    display:flex;align-items:center;justify-content:center;box-shadow:0 6px 14px rgba(47,84,235,.18)}
.cat-name{font-size:13px;color:var(--ink)}
.cat-1{background:#2f54eb}.cat-2{background:#00a3a3}.cat-3{background:#f06595}
.cat-4{background:#f59f00}.cat-5{background:#7048e8}.cat-6{background:#0ca678}

/* 首屏全宽 Banner（与分类导航留出间距，避免贴死） */
.hero{position:relative;height:420px;overflow:hidden;margin-top:24px}
.hero-slide{position:absolute;inset:0;height:420px;opacity:0;transition:opacity .6s;pointer-events:none}
.hero-slide:first-child{opacity:1}
.hero-slide.active{opacity:1;pointer-events:auto}
/* 实物图 Banner：底层铺图 + 左侧暗渐变保证文字可读 */
.hero-img{position:absolute;inset:0;background-size:cover;background-position:center}
.hero-slide.has-img::before{content:'';position:absolute;inset:0;
    background:linear-gradient(90deg,rgba(22,32,58,.55) 0%,rgba(22,32,58,.28) 45%,rgba(22,32,58,0) 80%)}
.hero-inner{position:relative;z-index:1;height:100%;display:flex;align-items:center}
/* 标题改用深色底卡：无论图片亮暗都保证白字可读 */
.hero-text h1{display:block;width:fit-content;color:#fff;font-size:38px;font-weight:800;line-height:1.4;
    background:linear-gradient(92deg,rgba(29,59,184,.94) 0%,rgba(47,84,235,.86) 100%);
    padding:16px 30px;border-radius:14px;box-shadow:0 12px 30px rgba(22,32,58,.28)}
.hero-cta{display:inline-block;margin-top:16px;color:#fff;background:rgba(22,32,58,.62);
    padding:10px 22px;border-radius:24px;font-size:15px;backdrop-filter:blur(4px)}
.hero-1{background:linear-gradient(120deg,#2f54eb,#5b7bff)}
.hero-2{background:linear-gradient(120deg,#7048e8,#f06595)}
.hero-default{background:linear-gradient(120deg,#1d3bb8,#0ca678)}

/* 公告条 */
.notice-bar{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);
    border-radius:10px;padding:10px 16px;margin-top:18px}
.notice-tag{background:var(--accent);color:#fff;font-size:12px;padding:2px 10px;border-radius:6px}
.notice-text{color:var(--ink);font-weight:600}

/* 通用区块 */
.block{margin-top:30px}
.block-head{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:16px;
    border-left:5px solid var(--primary);padding-left:12px}
.block-head h2{font-size:22px}
.more{color:var(--muted);font-size:13px}

/* 商品网格 */
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
    transition:.2s;display:flex}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(22,32,58,.10);border-color:var(--primary)}
.card a{display:block;width:100%}
.card-cover{height:200px;background:linear-gradient(135deg,#eaf0ff,#dfe7ff);display:flex;align-items:center;
    justify-content:center;font-size:60px;font-weight:800;color:var(--primary)}
.card-cover.no-cover{background:linear-gradient(135deg,#eaf0ff,#dfe7ff);color:var(--primary)}
.card-cover.has-img{background-size:cover;background-position:center;transition:transform .3s}
.card:hover .card-cover.has-img{transform:scale(1.04)}
.card-body{padding:14px 14px 16px}
.card-title{font-size:15px;font-weight:600;height:22px;overflow:hidden}
.card-sub{font-size:12px;color:var(--muted);height:18px;overflow:hidden;margin:4px 0}
.card-price{color:var(--accent);font-size:20px;font-weight:800;margin-top:6px}
.card-meta{font-size:12px;color:var(--muted);margin-top:4px}

/* 列表页布局 */
.list-layout{display:flex;gap:20px;margin-top:20px;align-items:flex-start}
.side{width:210px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;flex:none}
.side-title{font-size:16px;font-weight:700;margin-bottom:10px}
.side-cats{list-style:none}
.side-cats li{margin:2px 0}
.side-cats a{display:block;padding:9px 12px;border-radius:8px;color:var(--ink)}
.side-cats li.active a,.side-cats a:hover{background:var(--primary);color:#fff}
.list-main{flex:1;min-width:0}
.list-bar{display:flex;justify-content:space-between;align-items:center;background:var(--card);
    border:1px solid var(--line);border-radius:10px;padding:12px 16px;margin-bottom:16px}
.list-count{color:var(--muted)}
.sort a{margin-left:14px;color:var(--muted);font-size:13px}
.sort a.on{color:var(--primary);font-weight:700}
.pager{margin:24px 0;text-align:center}
.pager ul.pagination{list-style:none;margin:0;padding:0;display:flex;justify-content:center;gap:6px}
.pager ul.pagination li{display:inline-block}
.pager ul.pagination li a,.pager ul.pagination li span{display:inline-block;padding:6px 13px;border:1px solid var(--line);border-radius:6px;color:var(--ink);background:#fff;text-decoration:none}
.pager ul.pagination li a:hover{border-color:var(--primary);color:var(--primary)}
.pager ul.pagination li.active span{background:var(--primary);color:#fff;border-color:var(--primary)}
.pager ul.pagination li.disabled span{color:#b6bdcb;background:#f5f7fa;cursor:not-allowed}

/* 详情页 */
.detail{margin-top:20px}
.detail-main{display:flex;gap:30px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.detail-cover{width:420px;height:420px;flex:none;border-radius:12px;background:linear-gradient(135deg,#eaf0ff,#dfe7ff);
    display:flex;align-items:center;justify-content:center;font-size:120px;font-weight:800;color:var(--primary)}
.detail-cover.no-cover-lg{background:linear-gradient(135deg,#eaf0ff,#dfe7ff)}
.detail-cover.has-img{background-size:cover;background-position:center}
.detail-info{flex:1;min-width:0}
.detail-info h1{font-size:26px;margin-bottom:8px}
.detail-sub{color:var(--muted)}
.detail-price{margin:18px 0;display:flex;align-items:center;gap:14px}
.detail-price .now{color:var(--accent);font-size:34px;font-weight:800}
.detail-price .stock{color:var(--muted);font-size:13px}
.detail-sku{margin:14px 0;display:flex;gap:10px;align-items:center}
.sku-label{color:var(--muted)}
.sku-list{display:flex;flex-wrap:wrap;gap:8px}
.sku-item{border:1px solid var(--line);border-radius:8px;padding:6px 12px;font-size:13px}
.detail-actions{display:flex;gap:14px;margin:22px 0 12px}
.btn-buy,.btn-cart{border:0;border-radius:26px;padding:13px 34px;font-size:16px;cursor:pointer;font-weight:700}
.btn-buy{background:var(--accent);color:#fff}
.btn-cart{background:var(--primary);color:#fff}
.detail-extra{color:var(--muted);font-size:13px}
.detail-shop{margin-top:18px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px}
.shop-name{font-size:18px;font-weight:700}
.shop-meta{display:flex;gap:24px;color:var(--muted);font-size:13px;margin:8px 0}
.shop-desc{color:var(--muted)}
.detail-content{margin-top:18px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.detail-content h3{margin-bottom:10px}
.detail-desc{color:#3a4459;line-height:1.9}

/* 表单页（登录/注册/入驻） */
.form-page{display:flex;justify-content:center;padding:40px 0}
.form-card{width:560px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:32px 36px}
.form-title{font-size:24px;margin-bottom:6px}
.form-tip{color:var(--muted);margin-bottom:18px}
.form-error{background:var(--accent-soft);color:#c2410c;border:1px solid #ffd0a8;padding:10px 14px;border-radius:8px;margin-bottom:16px}
.form-row{margin-bottom:16px}
.form-row.two{display:flex;gap:16px}
.form-row.two>div{flex:1}
.form-row label{display:block;font-size:13px;margin-bottom:6px;color:var(--ink);font-weight:600}
.form-row label i{color:var(--accent);font-style:normal}
.form-row input,.form-row textarea{width:100%;border:1px solid var(--line);border-radius:8px;padding:11px 13px;font-size:14px;outline:0}
.form-row input:focus,.form-row textarea:focus{border-color:var(--primary)}
.check-group{display:flex;flex-wrap:wrap;gap:10px}
.check{display:flex;align-items:center;gap:6px;font-weight:400;font-size:13px;color:var(--ink)}
.form-actions{margin-top:8px}
.btn-primary{width:100%;border:0;background:var(--primary);color:#fff;padding:13px;border-radius:10px;font-size:16px;cursor:pointer;font-weight:700}
.btn-primary:hover{background:var(--primary-d)}
.form-foot{text-align:center;margin-top:16px;color:var(--muted)}
.form-foot a{color:var(--primary);margin-left:4px}

/* 页脚 */
.site-footer{background:var(--ink);color:#aeb8d0;margin-top:50px;padding:36px 0 22px}
.footer-inner{display:flex;gap:40px}
.foot-col{flex:1}
.foot-col h4{color:#fff;font-size:15px;margin-bottom:12px}
.foot-col a,.foot-col p{display:block;color:#aeb8d0;margin-bottom:8px;font-size:13px}
.foot-col a:hover{color:#fff}
.foot-copy{text-align:center;color:#7e8aa8;font-size:12px;margin-top:24px;border-top:1px solid #2a3654;padding-top:16px}

/* 页脚规则链接行 + 备案行（仿示例站结构） */
.foot-links{text-align:center;margin-top:20px;font-size:13px}
.foot-links a{color:#aeb8d0;margin:0 2px}
.foot-links a:hover{color:#fff;text-decoration:underline}
.foot-links i{display:inline-block;margin:0 8px;color:#3d4a6b;font-style:normal}
.foot-icp{text-align:center;color:#7e8aa8;font-size:12px;margin-top:6px}
.foot-icp a{color:#aeb8d0;text-decoration:none}
.foot-icp a:hover{color:#fff;text-decoration:underline}

/* 平台规则单页面 */
.doc-page{max-width:960px;margin:30px auto 10px;background:#fff;border-radius:10px;padding:36px 44px;box-shadow:0 4px 18px rgba(22,32,58,.06)}
.doc-title{font-size:24px;color:var(--ink);text-align:center;margin-bottom:6px}
.doc-updated{text-align:center;color:var(--muted);font-size:13px;margin-bottom:22px;padding-bottom:16px;border-bottom:1px solid #eef1f7}
.doc-h3{font-size:16px;color:var(--ink);margin:22px 0 10px}
.doc-p{font-size:14px;line-height:1.9;color:#4a5568;margin-bottom:8px}

/* 注册页协议勾选行 */
.agree-row{margin-top:4px}
.agree{display:flex;align-items:flex-start;gap:6px;font-size:13px;color:var(--muted);line-height:1.7}
.agree input{margin-top:3px}
.agree a{color:var(--primary)}