:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --bg: #f4f6f9;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --success: #16a34a;
  --warning: #d97706;
  --error: #dc2626;
  --info: #2563eb;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.mono { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 13px; }

.navbar { background: #fff; border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { font-size: 18px; font-weight: 700; color: var(--text); }
.brand:hover { text-decoration: none; }
.nav-links { display: flex; align-items: center; gap: 18px; font-size: 14px; }
.nav-links a { color: #374151; }
.nav-links a:hover { color: var(--primary); }
.nav-email { color: var(--muted); font-size: 13px; }

main.container { padding-top: 24px; padding-bottom: 48px; min-height: 70vh; }

.hero { text-align: center; padding: 32px 0 24px; }
.hero h1 { margin: 0 0 8px; font-size: 28px; }
.hero p { margin: 0; color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; margin-top: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 20px; }
.card-title { font-size: 18px; font-weight: 700; }
.card-meta { display: flex; justify-content: space-between; align-items: center; margin: 10px 0; }
.card-note { color: var(--muted); font-size: 13px; min-height: 20px; margin-bottom: 14px; }
.price { font-size: 20px; font-weight: 700; color: var(--error); }

.btn { display: inline-block; padding: 9px 18px; border: 1px solid transparent; border-radius: 6px; font-size: 14px; cursor: pointer; background: #e5e7eb; color: #111; }
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { background: #fff; border-color: var(--border); color: #374151; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-block { display: block; width: 100%; text-align: center; }
.btn-sm { padding: 5px 14px; background: var(--primary); color: #fff; border-radius: 6px; font-size: 13px; }
.btn-sm:hover { background: var(--primary-dark); color: #fff; text-decoration: none; }

.tag { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; }
.tag-success { background: #dcfce7; color: #15803d; }
.tag-warning { background: #fef3c7; color: #b45309; }
.tag-error { background: #fee2e2; color: #b91c1c; }
.tag-info { background: #dbeafe; color: #1d4ed8; }
.tag-muted { background: #f3f4f6; color: #6b7280; }

.alert { padding: 12px 14px; border-radius: 8px; margin: 12px 0; font-size: 14px; }
.alert-success { background: #dcfce7; color: #15803d; }
.alert-error { background: #fee2e2; color: #b91c1c; }
.alert-warning { background: #fef3c7; color: #b45309; }
.alert-info { background: #dbeafe; color: #1d4ed8; }
.empty { text-align: center; color: var(--muted); padding: 48px 0; }

.auth-wrap { display: flex; justify-content: center; padding: 24px 0; }
.auth-card { width: 100%; max-width: 420px; background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 28px; }
.auth-card h2 { margin: 0 0 18px; }
.auth-tabs { display: flex; border-bottom: 1px solid var(--border); margin-bottom: 18px; }
.auth-tabs .tab { flex: 1; padding: 10px; background: none; border: 0; cursor: pointer; font-size: 15px; color: var(--muted); border-bottom: 2px solid transparent; }
.auth-tabs .tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
.auth-link { text-align: center; color: var(--muted); font-size: 13px; margin-top: 16px; }

label { display: block; margin: 14px 0 6px; font-size: 14px; }
input[type="text"], input[type="email"], input[type="password"], input[type="number"], select, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; background: #fff;
}
textarea { font-family: inherit; resize: vertical; min-height: 96px; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); }
.input-row { display: flex; gap: 8px; align-items: center; }
.input-row input { flex: 1; }
.input-row .btn { flex-shrink: 0; }
.captcha-img { height: 42px; border: 1px solid var(--border); border-radius: 6px; cursor: pointer; flex-shrink: 0; }
.domain-suffix { font-size: 16px; color: var(--muted); flex-shrink: 0; }
.form-tip { font-size: 13px; margin-top: 4px; min-height: 18px; color: var(--muted); }
.tip-ok { color: var(--success); }
.tip-bad { color: var(--error); }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 16px; }
.form-grid-single { grid-template-columns: 1fr; }
.form-actions { margin-top: 16px; display: flex; gap: 10px; }
.order-total { margin: 16px 0; font-size: 15px; }
.order-total b { font-size: 22px; color: var(--error); }
.page-title { font-size: 20px; margin: 0 0 16px; }

.table-wrap { background: #fff; border: 1px solid var(--border); border-radius: 10px; overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { padding: 12px 14px; border-bottom: 1px solid var(--border); text-align: left; white-space: nowrap; }
.table th { background: #f9fafb; color: var(--muted); font-weight: 600; }
.table tr:last-child td { border-bottom: 0; }
.ops a, .link-btn { color: var(--primary); font-size: 13px; margin-right: 8px; background: none; border: 0; cursor: pointer; padding: 0; }
.link-btn.danger, .ops a.danger { color: var(--error); }
.filter-bar { margin-bottom: 14px; }

.footer { border-top: 1px solid var(--border); background: #fff; padding: 18px 0; text-align: center; color: var(--muted); font-size: 13px; }

.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar { width: 220px; background: linear-gradient(180deg, #1e40af, #3b82f6); color: #e0e7ff; display: flex; flex-direction: column; flex-shrink: 0; }
.admin-brand { padding: 20px 18px; font-size: 16px; font-weight: 700; color: #fff; border-bottom: 1px solid rgba(255,255,255,.15); }
.admin-sidebar nav { flex: 1; padding: 12px 0; }
.admin-sidebar nav a { display: block; padding: 11px 18px; color: #e0e7ff; font-size: 14px; }
.admin-sidebar nav a:hover { background: rgba(255,255,255,.12); color: #fff; text-decoration: none; }
.admin-sidebar nav a.active { background: #fff; color: #1e40af; font-weight: 600; }
.admin-sidebar-foot { padding: 14px 18px; border-top: 1px solid rgba(255,255,255,.15); display: flex; flex-direction: column; gap: 8px; }
.admin-sidebar-foot a { color: #dbeafe; font-size: 13px; }
.admin-sidebar-foot a:hover { color: #fff; }
.admin-main { flex: 1; padding: 24px; min-width: 0; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 14px; margin-bottom: 24px; }
.stat { background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 18px; }
.stat-num { font-size: 26px; font-weight: 700; }
.stat-label { color: var(--muted); font-size: 13px; margin-top: 4px; }

@media (max-width: 720px) {
  .form-grid { grid-template-columns: 1fr; }
  .admin-sidebar { width: 64px; }
  .admin-sidebar .admin-brand, .admin-sidebar nav a span, .admin-sidebar-foot a { font-size: 0; }
  .admin-sidebar nav a, .admin-sidebar-foot a { padding: 12px 10px; }
  .hero h1 { font-size: 26px; }
  .hero-stats { gap: 28px; }
  .section-head { flex-direction: column; align-items: stretch; }
  .search-input { max-width: none; }
}

/* 首页 Hero */
.hero { background: linear-gradient(135deg, #2563eb, #4f46e5); color: #fff; padding: 56px 0; }
.hero-inner { text-align: center; }
.hero h1 { margin: 0 0 12px; font-size: 34px; }
.hero-sub { margin: 0 0 28px; font-size: 16px; color: rgba(255,255,255,.85); }
.hero-actions { display: flex; gap: 12px; justify-content: center; margin-bottom: 32px; }
.btn-lg { padding: 12px 28px; font-size: 16px; border-radius: 8px; }
.btn-white { background: #fff; color: #2563eb; }
.btn-white:hover { background: #eef4ff; color: #2563eb; }
.btn-ghost { background: transparent; border: 1px solid rgba(255,255,255,.6); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.12); color: #fff; }
.hero-stats { display: flex; justify-content: center; gap: 48px; }
.hero-stat-num { font-size: 30px; font-weight: 700; }
.hero-stat-label { font-size: 13px; color: rgba(255,255,255,.75); margin-top: 4px; }

/* 首页分区 */
.section { padding: 40px 0; }
.section-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; gap: 16px; flex-wrap: wrap; }
.section-title { font-size: 22px; margin: 0; }
.search-input { max-width: 280px; padding: 9px 14px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; }

/* 域名卡片 */
.domain-card { display: flex; flex-direction: column; }
.domain-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.domain-name { font-size: 20px; font-weight: 700; }
.price small { font-size: 13px; color: var(--muted); }

/* 平台优势 */
.features { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; margin-top: 18px; }
.feature { background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 22px; }
.feature-icon { width: 44px; height: 44px; border-radius: 10px; background: #eef4ff; color: #2563eb; display: flex; align-items: center; justify-content: center; margin-bottom: 14px; }
.feature h3 { margin: 0 0 8px; font-size: 16px; }
.feature p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }

/* 支持的云解析平台 */
.platforms { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; margin-top: 18px; }
.platform { display: flex; gap: 14px; align-items: flex-start; background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 20px; }
.platform-icon { width: 46px; height: 46px; flex-shrink: 0; border-radius: 10px; background: #eef4ff; color: #2563eb; display: flex; align-items: center; justify-content: center; }
.platform h3 { margin: 0 0 6px; font-size: 16px; }
.platform p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
body.home-dark .platform { background: #111827; border-color: #1e293b; }
body.home-dark .platform-icon { background: rgba(34,211,238,.12); color: #22d3ee; }
body.home-dark .platform h3 { color: #f1f5f9; }
body.home-dark .platform p { color: #94a3b8; }

/* 首页深色科技风 */
body.home-dark { background: #0b1220; color: #e2e8f0; }
body.home-dark .navbar { background: rgba(11,18,32,.92); border-bottom: 1px solid #1e293b; }
body.home-dark .brand { color: #f1f5f9; }
body.home-dark .nav-links a { color: #cbd5e1; }
body.home-dark .nav-links a:hover { color: #22d3ee; }
body.home-dark .nav-email { color: #64748b; }
body.home-dark .btn-sm { background: #22d3ee; color: #06212b; }
body.home-dark .btn-sm:hover { background: #67e8f9; color: #06212b; }

body.home-dark .hero {
  background: radial-gradient(ellipse at 18% 0%, rgba(34,211,238,.16), transparent 52%),
              radial-gradient(ellipse at 82% 100%, rgba(59,130,246,.22), transparent 52%),
              #0b1220;
}
body.home-dark .hero-sub { color: #94a3b8; }
body.home-dark .hero-stat-label { color: #64748b; }
body.home-dark .btn-white { background: #22d3ee; color: #06212b; }
body.home-dark .btn-white:hover { background: #67e8f9; color: #06212b; }
body.home-dark .btn-ghost { border-color: rgba(34,211,238,.45); color: #e2e8f0; }
body.home-dark .btn-ghost:hover { background: rgba(34,211,238,.1); color: #fff; }

body.home-dark .section-title { color: #f1f5f9; }
body.home-dark .search-input { background: #111827; border-color: #1e293b; color: #e2e8f0; }
body.home-dark .search-input::placeholder { color: #64748b; }
body.home-dark .card { background: #111827; border-color: #1e293b; }
body.home-dark .domain-name { color: #f1f5f9; }
body.home-dark .card-note { color: #94a3b8; }
body.home-dark .price { color: #22d3ee; }
body.home-dark .price small { color: #64748b; }
body.home-dark .btn-outline { background: transparent; border-color: #334155; color: #cbd5e1; }
body.home-dark .btn-outline:hover { border-color: #22d3ee; color: #22d3ee; }
body.home-dark .btn-primary { background: #2563eb; color: #fff; }
body.home-dark .btn-primary:hover { background: #3b82f6; }
body.home-dark .empty { color: #64748b; }
body.home-dark .empty a { color: #22d3ee; }

body.home-dark .feature { background: #111827; border-color: #1e293b; }
body.home-dark .feature-icon { background: rgba(34,211,238,.12); color: #22d3ee; }
body.home-dark .feature h3 { color: #f1f5f9; }
body.home-dark .feature p { color: #94a3b8; }

body.home-dark .footer { background: #0b1220; border-top: 1px solid #1e293b; color: #64748b; }