:root{
  --primary:#1e3a8a;
  --primary-light:#2563eb;
  --primary-dark:#172554;
  --accent:#f59e0b;
  --danger:#dc2626;
  --text:#1e293b;
  --text-light:#64748b;
  --bg:#f1f5f9;
  --card:#ffffff;
  --border:#e2e8f0;
  --radius:16px;
  --shadow-sm:0 1px 3px rgba(15,23,42,.06);
  --shadow:0 4px 20px rgba(15,23,42,.08);
  --shadow-lg:0 12px 40px rgba(15,23,42,.14);
}
*{margin:0;padding:0;box-sizing:border-box;}
body{font-family:-apple-system,"PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;}
a{text-decoration:none;color:var(--primary-light);transition:.2s;}
a:hover{color:var(--primary);}
img{display:block;max-width:100%;}
.container{max-width:1200px;margin:0 auto;padding:0 20px;}

/* 导航 */
.navbar{background:linear-gradient(100deg,#0f172a 0%,#1e3a8a 55%,#1e40af 100%);position:sticky;top:0;z-index:1000;box-shadow:0 4px 24px rgba(15,23,42,.18);}
.nav-inner{display:flex;align-items:center;height:68px;gap:26px;}
.logo{color:#fff;font-size:23px;font-weight:800;letter-spacing:1px;white-space:nowrap;}
.logo span{color:#fbbf24;}
.nav-links{display:flex;gap:2px;flex:1;flex-wrap:wrap;}
.nav-links a{color:#cbd5e1;padding:8px 14px;border-radius:10px;font-size:14.5px;font-weight:500;transition:.25s;}
.nav-links a:hover,.nav-links a.active{background:rgba(255,255,255,.12);color:#fff;transform:translateY(-1px);}
.nav-user{display:flex;gap:10px;align-items:center;}
.nav-user a{color:#fff;padding:8px 18px;border-radius:10px;background:rgba(255,255,255,.1);font-size:14px;border:1px solid rgba(255,255,255,.15);}
.nav-user a:hover{background:rgba(255,255,255,.2);color:#fff;}
.nav-user a.btn-nav{background:linear-gradient(135deg,#f59e0b,#f97316);border:none;font-weight:600;box-shadow:0 4px 14px rgba(245,158,11,.4);}

/* 横幅 */
.hero{background:linear-gradient(135deg,#1e3a8a 0%,#2563eb 60%,#3b82f6 100%);color:#fff;padding:90px 0 100px;text-align:center;position:relative;overflow:hidden;}
.hero::before{content:"";position:absolute;top:-60%;right:-10%;width:600px;height:600px;background:radial-gradient(circle,rgba(255,255,255,.12),transparent 70%);border-radius:50%;}
.hero::after{content:"";position:absolute;bottom:-50%;left:-5%;width:500px;height:500px;background:radial-gradient(circle,rgba(251,191,36,.18),transparent 70%);border-radius:50%;}
.hero .container{position:relative;z-index:2;}
.hero h1{font-size:44px;font-weight:800;margin-bottom:18px;letter-spacing:2px;text-shadow:0 2px 12px rgba(0,0,0,.15);}
.hero p{font-size:19px;opacity:.92;margin-bottom:32px;}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}
.hero-btns a{padding:13px 34px;border-radius:12px;font-size:16px;font-weight:600;transition:.25s;}
.hero-btns .btn-white{background:#fff;color:var(--primary);box-shadow:0 8px 28px rgba(0,0,0,.18);}
.hero-btns .btn-white:hover{transform:translateY(-3px);box-shadow:0 12px 36px rgba(0,0,0,.25);color:var(--primary);}
.hero-btns .btn-ghost{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.35);}
.hero-btns .btn-ghost:hover{background:rgba(255,255,255,.24);color:#fff;}

/* 区块 */
.section{padding:60px 0;}
.section-title{font-size:26px;font-weight:800;color:var(--text);margin-bottom:28px;display:flex;align-items:center;gap:14px;}
.section-title::before{content:"";width:5px;height:28px;border-radius:4px;background:linear-gradient(180deg,#2563eb,#f59e0b);}
.section-title small{margin-left:auto;font-size:14px;font-weight:400;color:var(--text-light);}

/* 网格卡片 */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:24px;}
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden;transition:.3s cubic-bezier(.4,0,.2,1);display:flex;flex-direction:column;border:1px solid var(--border);}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-6px);border-color:transparent;}
.card-img{width:100%;height:190px;object-fit:cover;transition:.4s;}
.card:hover .card-img{transform:scale(1.04);}
.card-body{padding:20px;flex:1;display:flex;flex-direction:column;}
.card-title{font-size:16.5px;font-weight:700;margin-bottom:10px;color:var(--text);line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:48px;}
.card-meta{font-size:13px;color:var(--text-light);margin:3px 0;}
.price{color:var(--danger);font-size:23px;font-weight:800;margin:10px 0;}
.price::before{content:'¥';font-size:15px;font-weight:600;margin-right:2px;}

/* 按钮 */
.btn{display:inline-block;padding:10px 22px;border-radius:11px;border:none;cursor:pointer;font-size:14.5px;font-weight:600;transition:.25s;text-align:center;}
.btn-primary{background:linear-gradient(135deg,#2563eb,#1d4ed8);color:#fff;box-shadow:0 4px 14px rgba(37,99,235,.3);}
.btn-primary:hover{background:linear-gradient(135deg,#1d4ed8,#1e40af);color:#fff;transform:translateY(-2px);box-shadow:0 8px 22px rgba(37,99,235,.4);}
.btn-outline{background:#fff;color:var(--primary-light);border:1.5px solid #bfdbfe;}
.btn-outline:hover{background:#eff6ff;border-color:#2563eb;color:var(--primary);}
.btn-danger{background:linear-gradient(135deg,#ef4444,#dc2626);color:#fff;}
.btn-danger:hover{color:#fff;transform:translateY(-1px);}
.btn-sm{padding:6px 14px;font-size:13px;border-radius:8px;}
.btn-block{display:block;width:100%;}
.btn-link{background:none;border:none;color:var(--primary-light);cursor:pointer;font-size:14px;}

/* 表单 */
.form-box{background:#fff;border-radius:22px;padding:42px;max-width:500px;margin:48px auto;box-shadow:var(--shadow-lg);border:1px solid var(--border);}
.form-box h2{text-align:center;margin-bottom:30px;color:var(--text);font-size:26px;font-weight:800;}
.form-group{margin-bottom:20px;}
.form-group label{display:block;margin-bottom:8px;font-size:14px;color:#334155;font-weight:600;}
.form-control{width:100%;padding:13px 16px;border:1.5px solid var(--border);border-radius:11px;font-size:15px;transition:.25s;background:#f8fafc;}
.form-control:focus{outline:none;border-color:#3b82f6;background:#fff;box-shadow:0 0 0 4px rgba(59,130,246,.12);}
textarea.form-control{min-height:130px;resize:vertical;}
.checkbox-row{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--text-light);margin:6px 0 18px;}
.checkbox-row input[type=checkbox]{width:18px;height:18px;margin-top:3px;accent-color:#2563eb;cursor:pointer;flex-shrink:0;}
.checkbox-row label{cursor:pointer;font-weight:400;color:var(--text-light);margin:0;line-height:1.6;}

/* 提示 */
.alert{padding:14px 18px;border-radius:12px;margin-bottom:20px;font-size:14.5px;font-weight:500;}
.alert-success{background:#dcfce7;color:#15803d;border:1px solid #bbf7d0;}
.alert-error{background:#fee2e2;color:#b91c1c;border:1px solid #fecaca;}
.alert-info{background:#dbeafe;color:#1d4ed8;border:1px solid #bfdbfe;}

/* 表格 */
table.table{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border-radius:14px;overflow:hidden;box-shadow:var(--shadow-sm);}
table.table th,table.table td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--border);font-size:14px;}
table.table th{background:#f8fafc;color:#475569;font-weight:700;font-size:13.5px;text-transform:uppercase;letter-spacing:.3px;}
table.table tr:last-child td{border-bottom:none;}
table.table tr:hover td{background:#f8fafc;}

/* 徽章 */
.badge{display:inline-block;padding:4px 12px;border-radius:20px;font-size:12px;font-weight:600;}
.badge-green{background:#dcfce7;color:#15803d;}
.badge-red{background:#fee2e2;color:#b91c1c;}
.badge-yellow{background:#fef3c7;color:#b45309;}
.badge-blue{background:#dbeafe;color:#1d4ed8;}

/* 详情 */
.detail-box{background:#fff;border-radius:22px;padding:40px;box-shadow:var(--shadow);border:1px solid var(--border);}
.detail-title{font-size:28px;font-weight:800;margin-bottom:20px;color:var(--text);line-height:1.4;}
.detail-meta{display:flex;flex-wrap:wrap;gap:24px;font-size:14px;color:var(--text-light);padding:20px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);margin-bottom:26px;background:#f8fafc;border-radius:12px;padding:18px 22px;}
.detail-content{font-size:15.5px;line-height:2;color:#334155;}
.detail-content p{margin-bottom:14px;}
.detail-img{width:100%;max-width:640px;border-radius:16px;margin:24px 0;box-shadow:var(--shadow);}

/* 二维码 */
.qrcode-box{text-align:center;padding:36px;background:linear-gradient(180deg,#f8fafc,#fff);border-radius:18px;margin:24px 0;border:1px dashed #cbd5e1;}
.qrcode-box img{width:220px;height:220px;border:6px solid #fff;border-radius:16px;margin:0 auto;box-shadow:var(--shadow);}

/* 底部 */
.footer{background:linear-gradient(135deg,#0f172a,#1e293b);color:#94a3b8;padding:44px 0;margin-top:70px;text-align:center;font-size:14px;}
.footer-links{display:flex;gap:30px;justify-content:center;margin-bottom:16px;flex-wrap:wrap;}
.footer-links a{color:#cbd5e1;font-weight:500;}
.footer-links a:hover{color:#fbbf24;}
.footer a{color:#60a5fa;}

/* 分类筛选 */
.filter-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px;}
.filter-tabs a{padding:9px 20px;border-radius:11px;background:#fff;border:1.5px solid var(--border);font-size:14px;font-weight:600;color:#475569;transition:.2s;}
.filter-tabs a:hover{border-color:#3b82f6;color:#2563eb;}
.filter-tabs a.active{background:linear-gradient(135deg,#2563eb,#1d4ed8);color:#fff;border-color:transparent;box-shadow:0 4px 14px rgba(37,99,235,.3);}

/* 空状态 */
.empty{text-align:center;padding:60px 20px;color:var(--text-light);font-size:15px;}

@media(max-width:768px){
  .nav-links{display:none;}
  .hero h1{font-size:30px;}
  .hero p{font-size:16px;}
  .grid{grid-template-columns:1fr;}
  .form-box{padding:28px 22px;margin:28px auto;}
  .detail-box{padding:24px;}
}