/* ===== 全站共用样式 (assets/css/site.css) ===== */
:root{
  --brand:#0e86a4; --brand-dark:#0d3b59; --accent:#e8483e;
  --bg:#f7f8fa; --card:#ffffff; --ink:#182130; --muted:#6a7382; --line:#e7ebf0;
  --radius:14px; --shadow:0 1px 2px rgba(16,24,40,.04),0 10px 30px rgba(16,24,40,.06);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
.container{max-width:1120px;margin:0 auto;padding:0 20px}
.center{text-align:center}

/* ---- 顶部导航 ---- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-size:21px;font-weight:800;letter-spacing:-.01em}
.logo span{color:var(--brand)}
.nav{display:flex;align-items:center;gap:22px;font-weight:600}
.nav a:hover{color:var(--brand)}
.cart-link{position:relative;display:inline-flex;align-items:center;gap:6px}
.cart-badge{position:absolute;top:-8px;right:-12px;background:var(--accent);color:#fff;font-size:11px;font-weight:700;min-width:18px;height:18px;border-radius:10px;display:flex;align-items:center;justify-content:center;padding:0 5px}
.nav-toggle{display:none;background:none;border:none;font-size:22px}
@media(max-width:760px){
  .nav-toggle{display:block}
  .nav{position:fixed;inset:64px 0 auto 0;background:#fff;flex-direction:column;align-items:flex-start;padding:20px;gap:18px;border-bottom:1px solid var(--line);transform:translateY(-130%);transition:.25s;display:flex}
  .nav.open{transform:none}
}

/* ---- 按钮 ---- */
.btn{display:inline-block;background:var(--brand);color:#fff;padding:13px 26px;border-radius:999px;font-weight:600;border:none;font-size:15px;transition:.15s}
.btn:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn-accent{background:var(--accent)}
.btn-accent:hover{background:#c9382f}
.btn-outline{background:transparent;color:var(--brand);border:1.5px solid var(--brand)}
.btn-outline:hover{background:rgba(14,134,164,.08)}
.btn-lg{padding:15px 34px;font-size:16px}
.btn-block{width:100%;text-align:center}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}

/* ---- 商品卡 ---- */
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(235px,1fr));gap:22px}
.product-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.18s;position:relative}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.product-card .thumb{aspect-ratio:1/1;overflow:hidden;background:#eef1f5}
.product-card .thumb img{width:100%;height:100%;object-fit:cover;transition:.3s}
.product-card:hover .thumb img{transform:scale(1.05)}
.badge{position:absolute;top:12px;left:12px;background:var(--accent);color:#fff;font-size:12px;font-weight:700;padding:3px 9px;border-radius:6px;z-index:2}
.badge.new{background:var(--brand)}
.badge.sale{background:var(--accent)}
.pc-body{padding:14px 16px 16px}
.pc-body .pname{font-weight:600;font-size:15px;line-height:1.45;min-height:3em;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pc-meta{display:flex;align-items:center;gap:8px;margin-top:8px;font-size:12.5px;color:var(--muted)}
.rating{color:#f5a623}
.pc-price{display:flex;align-items:baseline;gap:8px;margin-top:6px;font-weight:700}
.pc-price .cur{font-size:20px;color:var(--ink)}
.pc-price .old{font-size:13px;color:var(--muted);text-decoration:line-through;font-weight:400}
.pc-btn{margin-top:12px;width:100%}

/* ---- 通用标题 ---- */
.sec-title{font-size:26px;font-weight:800;letter-spacing:-.01em;margin-bottom:6px}
.sec-sub{color:var(--muted);margin-bottom:24px}

/* ---- 页面头 ---- */
.page-head{background:linear-gradient(135deg,var(--brand-dark),var(--brand));color:#fff;padding:48px 0;text-align:center}
.page-head h1{font-size:30px}
.page-head p{opacity:.92;margin-top:6px}

/* ---- 表格/信息 ---- */
.tbl{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.tbl th,.tbl td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line);font-size:14.5px}
.tbl th{background:#f4f6f9;font-weight:600}
.tbl tr:last-child td{border-bottom:none}
@media(max-width:720px){.tbl .hide-m{display:none}}

/* ---- 表单 ---- */
.field{margin-bottom:16px}
.field label{display:block;font-weight:600;margin-bottom:6px;font-size:14px}
.field input,.field textarea,.field select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;background:#fff}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--brand)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:720px){.grid2{grid-template-columns:1fr}}

/* ---- 通知弹层 ---- */
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(30px);background:var(--ink);color:#fff;padding:12px 22px;border-radius:999px;font-size:14px;opacity:0;transition:.3s;z-index:99;pointer-events:none}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---- footer ---- */
.site-footer{background:var(--brand-dark);color:#cfe0ea;margin-top:60px}
.site-footer .container{padding-top:40px;padding-bottom:24px;display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}
.site-footer h4{color:#fff;margin-bottom:10px;font-size:15px}
.site-footer a{display:block;color:#cfe0ea;margin-bottom:6px;font-size:14px}
.site-footer a:hover{color:#fff}
.copyright{border-top:1px solid rgba(255,255,255,.12);text-align:center;padding:16px 0;font-size:13px}
@media(max-width:760px){.site-footer .container{grid-template-columns:1fr}}

/* ---- 空状态 ---- */
.empty{text-align:center;padding:60px 20px;color:var(--muted)}
.empty .big{font-size:46px;margin-bottom:10px}