/* AI同桌 资讯门户 —— 参考 kedagh.com 结构，重制为现代响应式静态站 */
:root{
  --brand:#2f6fe0;          /* 品牌蓝 */
  --brand-dark:#1f56b8;
  --brand-soft:#eef3fd;
  --accent:#fb941c;         /* 强调橙(参考原站按钮/标题竖条) */
  --ink:#1c2430;
  --muted:#65718a;
  --line:#e6ebf3;
  --bg:#f6f8fc;
  --card:#ffffff;
  --radius:12px;
  --shadow:0 2px 14px rgba(31,86,184,.07);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;color:var(--ink);background:var(--bg);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:15px;line-height:1.7;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.icon{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:0 0 auto}

/* 顶部服务条 */
.topbar{background:var(--brand);color:#fff;font-size:13px}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:36px}
.topbar .left{display:flex;align-items:center;gap:8px;opacity:.95}
.topbar .right{display:flex;align-items:center;gap:6px;font-weight:600}
.topbar .icon{width:15px;height:15px}

/* 头部/导航 */
.header{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.header .wrap{display:flex;align-items:center;gap:24px;height:70px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{height:40px;width:auto}
.brand .name{font-size:19px;font-weight:800;letter-spacing:.5px}
.brand .sub{font-size:11px;color:var(--muted);letter-spacing:2px}
.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav a{padding:8px 16px;border-radius:8px;font-size:15px;font-weight:600;color:#33415c;transition:.2s}
.nav a:hover{background:var(--brand-soft);color:var(--brand)}
.nav a.active{color:var(--brand)}
.btn-cta{margin-left:12px;background:var(--accent);color:#fff;padding:9px 20px;border-radius:22px;font-weight:700;font-size:14px;box-shadow:0 4px 12px rgba(251,148,28,.28);transition:.2s}
.btn-cta:hover{filter:brightness(1.05);transform:translateY(-1px)}
.menu-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:8px;padding:8px;cursor:pointer}

/* 通用区块标题 */
.sec-title{display:flex;align-items:center;gap:12px;margin:0 0 20px}
.sec-title h2{margin:0;font-size:22px;font-weight:800;padding-left:14px;border-left:5px solid var(--accent);line-height:1.1}
.sec-title .en{color:var(--muted);font-size:13px;letter-spacing:1px;text-transform:uppercase}
.sec-title .more{margin-left:auto;color:var(--muted);font-size:13px;display:flex;align-items:center;gap:4px}
.sec-title .more:hover{color:var(--brand)}

/* Hero */
.hero{background:linear-gradient(120deg,var(--brand) 0%,#4b86f0 60%,#5f9bff 100%);color:#fff;padding:60px 0}
.hero .wrap{display:flex;align-items:center;gap:40px;flex-wrap:wrap}
.hero .col{flex:1 1 340px}
.hero h1{font-size:34px;line-height:1.35;margin:0 0 16px;font-weight:800}
.hero p{font-size:16px;opacity:.92;margin:0 0 26px;max-width:520px}
.hero .actions{display:flex;gap:14px;flex-wrap:wrap}
.hero .a1{background:#fff;color:var(--brand);padding:12px 26px;border-radius:26px;font-weight:700}
.hero .a2{background:rgba(255,255,255,.15);color:#fff;padding:12px 26px;border-radius:26px;font-weight:700;border:1px solid rgba(255,255,255,.4)}
.hero .a1:hover,.hero .a2:hover{transform:translateY(-1px)}
.hero .stats{display:flex;gap:30px;margin-top:34px}
.hero .stat b{font-size:26px;font-weight:800;display:block}
.hero .stat span{font-size:13px;opacity:.85}

section{padding:52px 0}
section.alt{background:var(--card)}

/* 置顶/资讯卡片网格 */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.2s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px);box-shadow:0 10px 26px rgba(31,86,184,.14)}
.card .thumb{height:150px;background:var(--brand-soft);display:flex;align-items:center;justify-content:center;color:var(--brand)}
.card .thumb .icon{width:44px;height:44px;stroke-width:1.4;opacity:.8}
.card .body{padding:16px 16px 18px;flex:1;display:flex;flex-direction:column}
.card h3{margin:0 0 8px;font-size:16px;font-weight:700;line-height:1.4}
.card p{margin:0 0 14px;color:var(--muted);font-size:13.5px;flex:1}
.card .foot{display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--muted)}
.tag{display:inline-block;background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:600;padding:2px 10px;border-radius:20px}
.price{color:var(--accent);font-weight:700}

/* 特色服务 */
.feat{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feat .item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;box-shadow:var(--shadow)}
.feat .ico{width:48px;height:48px;border-radius:12px;background:var(--brand-soft);color:var(--brand);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.feat .ico .icon{width:24px;height:24px}
.feat h4{margin:0 0 8px;font-size:16px;font-weight:700}
.feat p{margin:0;color:var(--muted);font-size:14px}

/* 关于我们 */
.about{display:flex;gap:44px;align-items:center;flex-wrap:wrap}
.about .txt{flex:1 1 380px}
.about .txt p{color:#3a4763;margin:0 0 14px}
.about .side{flex:1 1 300px;background:linear-gradient(135deg,var(--brand),#5f9bff);border-radius:16px;color:#fff;padding:34px}
.about .side h4{margin:0 0 18px;font-size:18px}
.about .side ul{list-style:none;margin:0;padding:0}
.about .side li{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.18);font-size:15px}
.about .side li:last-child{border-bottom:none}

/* 资讯列表 */
.news-list{display:flex;flex-direction:column;gap:2px}
.news-item{display:flex;align-items:center;gap:16px;padding:16px 0;border-bottom:1px dashed var(--line);cursor:pointer;background:none;border-left:none;border-right:none;border-top:none;width:100%;text-align:left;font:inherit;color:inherit}
.news-item .date{flex:0 0 auto;text-align:center;background:var(--brand-soft);color:var(--brand);border-radius:8px;padding:8px 12px;min-width:64px}
.news-item .date b{display:block;font-size:20px;font-weight:800;line-height:1}
.news-item .date span{font-size:11px}
.news-item .info{flex:1;min-width:0}
.news-item .info h3{margin:0 0 4px;font-size:16px;font-weight:600}
.news-item:hover .info h3{color:var(--brand)}
.news-item .info p{margin:0;color:var(--muted);font-size:13.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.news-item .amount{flex:0 0 auto;display:flex;flex-direction:column;align-items:flex-end;gap:2px}
.news-item .amount .fee{color:var(--accent);font-size:18px;font-weight:800;line-height:1}
.news-item .amount .buy{display:inline-flex;align-items:center;gap:3px;font-size:12px;color:var(--muted)}
.news-item:hover .amount .buy{color:var(--brand)}
.news-item .arrow{color:var(--muted)}

/* 收款码弹窗 */
.pay-mask{position:fixed;top:0;left:0;right:0;bottom:0;width:100%;height:100%;background:rgba(18,26,42,.62);display:none;align-items:center;justify-content:center;z-index:60;padding:20px;overflow-y:auto;-webkit-overflow-scrolling:touch}
.pay-mask.show{display:flex}
.pay-box{background:#fff;border-radius:16px;width:100%;max-width:340px;padding:26px 24px 22px;text-align:center;position:relative;box-shadow:0 18px 50px rgba(18,26,42,.35);animation:payIn .22s ease}
@keyframes payIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.pay-close{position:absolute;top:12px;right:14px;width:30px;height:30px;border:none;background:#f2f5fa;border-radius:50%;color:#65718a;font-size:20px;line-height:1;cursor:pointer}
.pay-close:hover{background:#e6ebf3;color:var(--ink)}
.pay-box .pay-title{font-size:15px;font-weight:700;line-height:1.5;margin:2px 22px 14px;color:var(--ink)}
.pay-box .pay-price{font-size:14px;color:var(--muted);margin-bottom:16px}
.pay-box .pay-price b{color:var(--accent);font-size:26px;font-weight:800;margin-left:4px}
.pay-box .pay-qr{width:220px;height:220px;margin:0 auto;border:1px solid var(--line);border-radius:12px;padding:10px;background:#fff}
.pay-box .pay-qr img{width:100%;height:100%;object-fit:contain}
.pay-box .qr-fallback{width:100%;height:100%;align-items:center;justify-content:center;text-align:center;color:var(--muted);font-size:13px;line-height:1.7}
.pay-box .pay-methods{display:flex;align-items:center;justify-content:center;gap:14px;margin:14px 0 6px;color:var(--muted);font-size:13px;font-weight:600}
.pay-box .pay-methods span{display:inline-flex;align-items:center;gap:5px}
.pay-box .pay-tip{color:var(--muted);font-size:12.5px;line-height:1.6;margin:8px 4px 0}
@media(max-width:520px){
  .pay-mask{align-items:flex-start;padding:16px}
  .pay-box{max-width:none;padding:22px 18px 18px;margin:auto}
  .pay-box .pay-qr{width:200px;height:200px}
}

/* 联系 */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.contact-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);display:flex;gap:16px;align-items:flex-start}
.contact-card .ico{width:46px;height:46px;border-radius:12px;background:var(--brand-soft);color:var(--brand);display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.contact-card h4{margin:0 0 6px;font-size:16px}
.contact-card p{margin:0;color:var(--muted);font-size:14px}
.page-head{background:linear-gradient(120deg,var(--brand),#5f9bff);color:#fff;padding:46px 0}
.page-head h1{margin:0 0 8px;font-size:28px;font-weight:800}
.page-head .crumb{font-size:13px;opacity:.9}

/* 页脚 */
.footer{background:#1b2536;color:#aeb8cc;font-size:13.5px;padding:40px 0 24px}
.footer .cols{display:flex;gap:50px;flex-wrap:wrap;margin-bottom:26px}
.footer .col h5{color:#fff;font-size:15px;margin:0 0 14px}
.footer .col a{display:block;color:#aeb8cc;padding:4px 0}
.footer .col a:hover{color:#fff}
.footer .col p{margin:6px 0;display:flex;gap:8px;align-items:flex-start}
.footer .bottom{border-top:1px solid #2c3852;padding-top:18px;text-align:center;color:#7d89a3;line-height:1.9}
.footer .bottom a{color:#7d89a3}
.footer .bottom a:hover{color:#fff}

@media(max-width:860px){
  .grid,.feat{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .nav{display:none}
  .btn-cta{display:none}
  .menu-toggle{display:inline-flex}
  .nav.open{display:flex;position:absolute;top:70px;left:0;right:0;flex-direction:column;background:#fff;border-bottom:1px solid var(--line);padding:10px 20px;gap:2px;box-shadow:var(--shadow)}
  .nav.open a{padding:12px}
  .hero h1{font-size:26px}
  .header .wrap{gap:12px}
}
@media(max-width:520px){
  .grid,.feat{grid-template-columns:1fr}
  .topbar .left span.hide{display:none}
  .hero .stats{gap:20px}
}

/* ══════════════ 商城 / 商家入驻 / 注册登录（新增栏目） ══════════════ */

/* 头部购物车按钮 */
.cart-btn{position:relative;display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;color:#33415c;transition:.2s;margin-left:6px}
.cart-btn:hover{background:var(--brand-soft);color:var(--brand)}
.cart-btn .icon{width:21px;height:21px}
.cart-btn .badge{position:absolute;top:2px;right:2px;min-width:17px;height:17px;padding:0 4px;background:var(--accent);color:#fff;border-radius:9px;font-size:11px;font-weight:700;line-height:17px;text-align:center;box-shadow:0 2px 6px rgba(251,148,28,.4)}

/* 分类筛选条 */
.cat-bar{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 26px}
.cat-bar button{border:1px solid var(--line);background:var(--card);color:#33415c;padding:8px 18px;border-radius:22px;font-size:14px;font-weight:600;cursor:pointer;transition:.2s}
.cat-bar button:hover{border-color:var(--brand);color:var(--brand)}
.cat-bar button.on{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 4px 12px rgba(47,111,224,.25)}

/* 商品网格 */
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.prod{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:.2s}
.prod:hover{transform:translateY(-4px);box-shadow:0 10px 26px rgba(31,86,184,.14)}
.prod .thumb{height:170px;background:linear-gradient(135deg,var(--brand-soft),#f4f8ff);display:flex;align-items:center;justify-content:center;color:var(--brand);position:relative}
.prod .thumb .icon{width:56px;height:56px;stroke-width:1.3;opacity:.85}
.prod .thumb .badge-hot{position:absolute;top:12px;left:12px;background:var(--accent);color:#fff;font-size:11px;font-weight:700;padding:3px 9px;border-radius:20px}
.prod .body{padding:15px 15px 16px;flex:1;display:flex;flex-direction:column}
.prod h3{margin:0 0 6px;font-size:15px;font-weight:700;line-height:1.45;min-height:43px}
.prod .spec{margin:0 0 12px;color:var(--muted);font-size:12.5px;flex:1}
.prod .price-row{display:flex;align-items:baseline;gap:8px;margin-bottom:12px}
.prod .price-row .now{color:#e23b3b;font-weight:800;font-size:20px}
.prod .price-row .now small{font-size:13px;font-weight:700}
.prod .price-row .was{color:#b7c0d0;font-size:13px;text-decoration:line-through}
.prod .acts{display:flex;gap:8px}
.prod .acts button{flex:1;border:none;border-radius:8px;padding:9px 0;font-size:13.5px;font-weight:700;cursor:pointer;transition:.2s;display:inline-flex;align-items:center;justify-content:center;gap:5px}
.prod .acts .add{background:var(--brand-soft);color:var(--brand)}
.prod .acts .add:hover{background:#e0eaff}
.prod .acts .buy{background:var(--accent);color:#fff;box-shadow:0 4px 12px rgba(251,148,28,.28)}
.prod .acts .buy:hover{filter:brightness(1.04)}
.prod .acts .icon{width:15px;height:15px}

/* 轻提示 toast */
.toast{position:fixed;left:50%;bottom:40px;transform:translateX(-50%) translateY(20px);background:rgba(28,36,48,.94);color:#fff;padding:12px 22px;border-radius:26px;font-size:14px;font-weight:600;z-index:90;opacity:0;pointer-events:none;transition:.28s;display:flex;align-items:center;gap:8px;box-shadow:0 10px 30px rgba(0,0,0,.25)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast .icon{width:18px;height:18px;color:#5fe08a}

/* 商城说明条 */
.mall-tip{background:var(--brand-soft);border:1px solid #dce7fb;border-radius:12px;padding:14px 18px;display:flex;gap:10px;align-items:flex-start;color:#33507e;font-size:13.5px;margin-bottom:26px}
.mall-tip .icon{width:19px;height:19px;flex:0 0 auto;color:var(--brand);margin-top:1px}

/* ── 注册登录页 ── */
.auth-wrap{display:flex;gap:44px;align-items:stretch;flex-wrap:wrap}
.auth-side{flex:1 1 320px;background:linear-gradient(135deg,var(--brand),#5f9bff);border-radius:16px;color:#fff;padding:40px 36px;display:flex;flex-direction:column;justify-content:center}
.auth-side h2{margin:0 0 14px;font-size:24px;font-weight:800;line-height:1.4}
.auth-side p{margin:0 0 26px;opacity:.92;font-size:14.5px}
.auth-side ul{list-style:none;margin:0;padding:0}
.auth-side li{display:flex;align-items:center;gap:10px;padding:9px 0;font-size:14.5px;border-bottom:1px solid rgba(255,255,255,.18)}
.auth-side li:last-child{border-bottom:none}
.auth-side li .icon{width:18px;height:18px;flex:0 0 auto}
.auth-card{flex:1 1 360px;background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:8px 34px 34px}
.auth-tabs{display:flex;border-bottom:1px solid var(--line);margin:0 -34px 26px;padding:0 34px}
.auth-tabs button{flex:1;background:none;border:none;padding:20px 0 16px;font-size:16px;font-weight:700;color:var(--muted);cursor:pointer;position:relative}
.auth-tabs button.on{color:var(--brand)}
.auth-tabs button.on::after{content:"";position:absolute;left:50%;bottom:-1px;transform:translateX(-50%);width:44px;height:3px;background:var(--brand);border-radius:3px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;color:#33415c;margin-bottom:6px}
.field input{width:100%;border:1px solid var(--line);border-radius:9px;padding:11px 14px;font-size:14.5px;color:var(--ink);background:#fafbfe;transition:.2s;font-family:inherit}
.field input:focus{outline:none;border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(47,111,224,.12)}
.field .with-code{display:flex;gap:10px}
.field .with-code input{flex:1}
.field .with-code button{flex:0 0 auto;border:1px solid var(--brand);background:var(--brand-soft);color:var(--brand);border-radius:9px;padding:0 16px;font-size:13px;font-weight:700;cursor:pointer;white-space:nowrap}
.auth-row{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted);margin:-4px 0 18px}
.auth-row label{display:flex;align-items:center;gap:6px;cursor:pointer}
.auth-row a{color:var(--brand)}
.btn-submit{width:100%;border:none;background:var(--brand);color:#fff;border-radius:26px;padding:13px 0;font-size:15.5px;font-weight:700;cursor:pointer;transition:.2s;box-shadow:0 6px 16px rgba(47,111,224,.28)}
.btn-submit:hover{background:var(--brand-dark);transform:translateY(-1px)}
.auth-alt{text-align:center;color:var(--muted);font-size:13px;margin-top:16px}
.auth-alt a{color:var(--brand);font-weight:600}
.auth-agree{font-size:12px;color:var(--muted);text-align:center;margin-top:16px;line-height:1.7}
.auth-agree a{color:var(--brand)}

/* ── 商家入驻页 ── */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;position:relative}
.steps .step{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px 16px;text-align:center;box-shadow:var(--shadow);position:relative}
.steps .step .num{width:44px;height:44px;margin:0 auto 12px;border-radius:50%;background:var(--brand);color:#fff;font-size:19px;font-weight:800;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(47,111,224,.3)}
.steps .step h4{margin:0 0 6px;font-size:15px;font-weight:700}
.steps .step p{margin:0;color:var(--muted);font-size:12.5px}
.steps .step .arrow{position:absolute;top:44px;right:-11px;color:#c7d3e8;z-index:2}
.steps .step:last-child .arrow{display:none}

.guide{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.guide .g{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.guide .g .head{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.guide .g .head .ico{width:46px;height:46px;border-radius:12px;background:var(--brand-soft);color:var(--brand);display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.guide .g .head h4{margin:0;font-size:17px;font-weight:700}
.guide .g ul{list-style:none;margin:0;padding:0}
.guide .g li{display:flex;gap:10px;padding:8px 0;color:#3a4763;font-size:14px;border-bottom:1px dashed var(--line)}
.guide .g li:last-child{border-bottom:none}
.guide .g li .icon{width:17px;height:17px;flex:0 0 auto;color:var(--brand);margin-top:3px}

.fee-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.fee-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;box-shadow:var(--shadow);text-align:center}
.fee-card.hot{border-color:var(--brand);box-shadow:0 10px 26px rgba(31,86,184,.14)}
.fee-card .t{font-size:17px;font-weight:800;margin-bottom:8px}
.fee-card .amt{color:var(--accent);font-size:30px;font-weight:800;line-height:1.2}
.fee-card .amt small{font-size:14px;font-weight:700;color:var(--muted)}
.fee-card .desc{color:var(--muted);font-size:13px;margin-top:8px}

.apply-cta{background:linear-gradient(120deg,var(--brand),#5f9bff);border-radius:16px;color:#fff;padding:38px;text-align:center}
.apply-cta h3{margin:0 0 8px;font-size:22px;font-weight:800}
.apply-cta p{margin:0 0 22px;opacity:.92}
.apply-cta a{display:inline-block;background:#fff;color:var(--brand);padding:12px 34px;border-radius:26px;font-weight:700;font-size:15px}
.apply-cta a:hover{transform:translateY(-1px)}

@media(max-width:860px){
  .prod-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .steps .step .arrow{display:none}
  .guide,.fee-grid{grid-template-columns:1fr}
  .auth-tabs{margin-left:-20px;margin-right:-20px;padding:0 20px}
  .auth-card{padding:8px 22px 26px}
}
@media(max-width:520px){
  .prod-grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .prod .thumb{height:130px}
  .prod h3{font-size:14px;min-height:40px}
  .steps{grid-template-columns:1fr}
}