/* ===== 基础 ===== */
* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #1a5fb4; --primary-dark: #1c4e8a; --danger: #c01c28;
  --bg: #f6f7f9; --card: #fff; --text: #24292f; --muted: #6e7781;
  --border: #d8dee4; --radius: 8px;
}
body { font-family: -apple-system, "Segoe UI", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); }
h1 { font-size: 1.6rem; margin: 16px 0; }
h2 { font-size: 1.25rem; margin: 24px 0 12px; }

/* ===== 头部 / 导航 ===== */
.site-header { background: var(--card); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo { font-weight: 700; font-size: 1.15rem; color: var(--text); }
.main-nav { display: flex; gap: 18px; align-items: center; }
.main-nav a { color: var(--text); }
.lang-switch a.active { font-weight: 700; color: var(--primary); }
.nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; }

/* ===== 主区 ===== */
.main-content { padding: 24px 16px 48px; min-height: 60vh; }
.hero { text-align: center; padding: 40px 0 28px; }
.hero h1 { font-size: 2rem; }
.hero p { color: var(--muted); margin: 8px 0 20px; }
.search-bar { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin: 12px 0; }
.search-bar input[type=text] { flex: 1 1 320px; max-width: 560px; padding: 10px 14px; border: 1px solid var(--border); border-radius: var(--radius); }
.search-bar select { padding: 10px; border: 1px solid var(--border); border-radius: var(--radius); }
.result-info { margin: 8px 0; color: var(--muted); }
.empty { padding: 40px 0; text-align: center; color: var(--muted); }

/* ===== 卡片网格 ===== */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; margin: 16px 0; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px;
  color: var(--text); transition: box-shadow .15s; display: block; }
.card:hover { box-shadow: 0 4px 14px rgba(0,0,0,.08); text-decoration: none; }
.card h3 { font-size: 1.05rem; margin-bottom: 6px; }
.cat-card { position: relative; }
.badge { position: absolute; top: 12px; right: 12px; background: var(--primary); color: #fff;
  border-radius: 999px; padding: 2px 10px; font-size: .8rem; }
.product-card img, .img-placeholder { width: 100%; height: 160px; object-fit: cover; border-radius: 6px; margin-bottom: 10px; }
.img-placeholder { background: #e5e9ef; display: flex; align-items: center; justify-content: center;
  color: var(--muted); font-weight: 700; }
.img-placeholder.large { height: 320px; font-size: 1.4rem; }
.product-card .model { color: var(--muted); font-size: .9rem; }
.product-card .summary { font-size: .9rem; color: var(--muted);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ===== 按钮 ===== */
.btn { display: inline-block; padding: 8px 16px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--card); color: var(--text); cursor: pointer; font-size: .95rem; }
.btn:hover { background: #f0f2f5; text-decoration: none; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-sm { padding: 4px 10px; font-size: .85rem; }
.btn-block { width: 100%; }

/* ===== 表格 ===== */
.table-wrap { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; background: var(--card); margin: 12px 0; }
.data-table th, .data-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); text-align: left; font-size: .92rem; }
.data-table th { background: #f0f2f5; white-space: nowrap; }
.spec-table { width: 100%; border-collapse: collapse; margin-top: 8px; }
.spec-table th, .spec-table td { padding: 8px 12px; border: 1px solid var(--border); text-align: left; }
.spec-table th { background: #f0f2f5; width: 40%; }

/* ===== 详情页 ===== */
.breadcrumb { font-size: .9rem; color: var(--muted); margin-bottom: 12px; }
.product-layout { display: grid; grid-template-columns: 1fr 1.2fr; gap: 28px; margin: 16px 0; }
.main-img { border-radius: var(--radius); border: 1px solid var(--border); }
.thumb-row { display: flex; gap: 10px; margin-top: 10px; flex-wrap: wrap; }
.thumb-row img { width: 90px; height: 90px; object-fit: cover; border-radius: 6px; border: 1px solid var(--border); }
.perm { padding: 2px 8px; border-radius: 999px; font-size: .8rem; }
.perm-public { background: #dafbe1; color: #116329; }
.perm-admin { background: #ffebe9; color: #a40e26; }
.desc { background: var(--card); padding: 16px; border-radius: var(--radius); border: 1px solid var(--border); }
.price-table th { width: 220px; }
.price-msrp { color: var(--primary); font-weight: 700; }
.price-fieldset { border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; margin: 16px 0; }
.price-fieldset legend { font-weight: 600; padding: 0 8px; }
.price-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 12px; }
@media (max-width: 640px) { .price-grid { grid-template-columns: repeat(2, 1fr); } }

/* ===== 表单 ===== */
.auth-box { max-width: 420px; margin: 40px auto; background: var(--card); padding: 28px;
  border: 1px solid var(--border); border-radius: var(--radius); }
.auth-box label, .edit-form label { display: block; margin: 12px 0 4px; font-weight: 600; font-size: .9rem; }
.auth-box input, .edit-form input[type=text], .edit-form input[type=file], .edit-form select,
.edit-form textarea, .file-form input, .file-form select, .io-btns input {
  width: 100%; padding: 9px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: .95rem; }
.auth-box .btn { margin-top: 16px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 16px; }
.file-form { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin: 12px 0; }
.file-form input, .file-form select { width: auto; }
.inline-form { display: inline-flex; gap: 6px; align-items: center; }
.admin-thumb { max-width: 180px; border-radius: 6px; margin-bottom: 8px; }
.thumb-box { text-align: center; position: relative; }
.thumb-box .main-badge { position: absolute; top: 2px; left: 2px; background: var(--pri, #1a1a2e); color: #fff; font-size: 10px; padding: 1px 6px; border-radius: 8px; }
.thumb-edit { margin-top: 4px; display: flex; flex-direction: column; gap: 3px; width: 110px; }
.thumb-edit input[type="text"] { width: 100%; padding: 3px 5px; font-size: 11px; border: 1px solid var(--border); border-radius: 4px; }
.thumb-edit-row { display: flex; gap: 3px; justify-content: center; }
.thumb-edit-row .sort-input { width: 42px; padding: 3px 4px; font-size: 11px; border: 1px solid var(--border); border-radius: 4px; }

/* ===== 后台 ===== */
.admin-nav { display: flex; gap: 4px; margin: 16px 0 20px; border-bottom: 2px solid var(--border); flex-wrap: wrap; }
.admin-nav a { padding: 10px 16px; color: var(--muted); border-bottom: 2px solid transparent; margin-bottom: -2px; }
.admin-nav a.active, .admin-nav a:hover { color: var(--primary); border-bottom-color: var(--primary); text-decoration: none; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin: 16px 0; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; text-align: center; }
.stat .num { display: block; font-size: 1.8rem; font-weight: 700; color: var(--primary); }
.toolbar { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin: 12px 0; }
.io-btns { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.status { padding: 2px 8px; border-radius: 999px; font-size: .8rem; }
.status-published { background: #dafbe1; color: #116329; }
.status-draft { background: #eaeef2; color: var(--muted); }

/* ===== 提示 / 分页 / 错误 ===== */
.flash { padding: 12px 16px; border-radius: var(--radius); margin: 12px 0; }
.flash-success { background: #dafbe1; color: #116329; }
.flash-error { background: #ffebe9; color: #a40e26; }
.flash-warning { background: #fff8c5; color: #7d4e00; }
.pagination { display: flex; gap: 16px; justify-content: center; align-items: center; margin: 20px 0; }
.error-page { text-align: center; padding: 60px 0; }
.error-page h1 { font-size: 4rem; }
.site-footer { border-top: 1px solid var(--border); padding: 20px 0; text-align: center; color: var(--muted); font-size: .9rem; }

/* ===== 响应式：平板 ===== */
@media (max-width: 900px) {
  .product-layout, .form-grid { grid-template-columns: 1fr; }
}
/* ===== 响应式：手机 ===== */
@media (max-width: 640px) {
  .nav-toggle { display: block; }
  .main-nav { display: none; position: absolute; top: 60px; left: 0; right: 0; background: var(--card);
    flex-direction: column; align-items: stretch; padding: 12px 16px; border-bottom: 1px solid var(--border); gap: 12px; }
  .main-nav.open { display: flex; }
  .hero h1 { font-size: 1.5rem; }
  .card-grid { grid-template-columns: 1fr 1fr; }
  .search-bar input[type=text] { flex-basis: 100%; }
}
@media (max-width: 420px) {
  .card-grid { grid-template-columns: 1fr; }
}