:root {
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --bg: #f8f9fa;
  --card: #fff;
  --text: #202124;
  --muted: #5f6368;
  --border: #dadce0;
  --success: #34a853;
  --danger: #ea4335;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.08);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.5;
  min-height: 100vh; display: flex; flex-direction: column;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.header {
  background: var(--card); border-bottom: 1px solid var(--border);
  padding: 12px 16px; position: sticky; top: 0; z-index: 100; box-shadow: var(--shadow);
}
.header-inner {
  max-width: 1100px; margin: 0 auto; display: flex; align-items: center;
  justify-content: space-between; gap: 12px; flex-wrap: wrap;
}
.logo { font-size: 1.25rem; font-weight: 700; color: var(--primary); display: flex; align-items: center; gap: 8px; }
.logo span:first-child { font-size: 1.5rem; }
.nav { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.nav a, .nav button {
  padding: 8px 14px; border-radius: 8px; font-size: .9rem; border: none;
  background: transparent; cursor: pointer; color: var(--text); font-weight: 500;
}
.nav a:hover, .nav button:hover { background: #e8f0fe; color: var(--primary); text-decoration: none; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 18px; border-radius: 8px; font-size: .95rem; font-weight: 500;
  border: none; cursor: pointer; transition: background .15s, transform .1s;
}
.btn:active { transform: scale(.98); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { background: #f1f3f4; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 6px 12px; font-size: .85rem; }
.main { flex: 1; max-width: 1100px; width: 100%; margin: 0 auto; padding: 20px 16px 40px; }
.hero { text-align: center; padding: 30px 0 20px; }
.hero h1 { font-size: 1.75rem; margin-bottom: 8px; }
.hero p { color: var(--muted); margin-bottom: 24px; max-width: 500px; margin-left: auto; margin-right: auto; }
.search-box {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 20px; max-width: 640px; margin: 0 auto 30px;
}
.search-tabs { display: flex; gap: 4px; margin-bottom: 16px; background: #f1f3f4; border-radius: 8px; padding: 4px; }
.tab {
  flex: 1; padding: 10px; border: none; background: transparent; border-radius: 6px;
  cursor: pointer; font-weight: 500; color: var(--muted);
}
.tab.active { background: #fff; color: var(--primary); box-shadow: 0 1px 2px rgba(0,0,0,.1); }
.search-input-group { display: flex; gap: 8px; flex-wrap: wrap; }
.search-input-group input {
  flex: 1; min-width: 180px; padding: 12px 14px; border: 1px solid var(--border);
  border-radius: 8px; font-size: 1rem; outline: none;
}
.search-input-group input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,115,232,.2); }
.results { margin-top: 20px; }
.result-card {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 16px; margin-bottom: 12px; display: flex; gap: 16px; align-items: flex-start; flex-wrap: wrap;
}
.result-info { flex: 1; min-width: 200px; }
.result-info h3 { font-size: 1.05rem; margin-bottom: 4px; }
.result-info .oem { font-family: monospace; color: var(--primary); font-size: .95rem; }
.result-info .meta { color: var(--muted); font-size: .85rem; margin-top: 6px; }
.price { font-weight: 700; color: var(--success); font-size: 1.1rem; }
.card {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px;
}
.card h3 { margin-bottom: 8px; font-size: 1.1rem; }
.card p { color: var(--muted); font-size: .9rem; }
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: .85rem; font-weight: 500; margin-bottom: 4px; color: var(--muted); }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 1rem; outline: none;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,115,232,.2); }
.form-group textarea { min-height: 100px; resize: vertical; }
.auth-box {
  max-width: 380px; margin: 40px auto; background: var(--card); padding: 28px;
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.auth-box h2 { text-align: center; margin-bottom: 20px; }
.auth-toggle { text-align: center; margin-top: 16px; font-size: .9rem; color: var(--muted); }
.cabinet-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; flex-wrap: wrap; gap: 10px; }
.tabs-nav { display: flex; gap: 4px; margin-bottom: 20px; border-bottom: 1px solid var(--border); overflow-x: auto; }
.tabs-nav a, .tabs-nav button {
  padding: 10px 16px; border: none; background: none; cursor: pointer; font-weight: 500;
  color: var(--muted); border-bottom: 2px solid transparent; white-space: nowrap; text-decoration: none;
}
.tabs-nav a.active, .tabs-nav button.active { color: var(--primary); border-bottom-color: var(--primary); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
th, td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--border); font-size: .9rem; }
th { background: #f8f9fa; font-weight: 600; color: var(--muted); }
tr:last-child td { border-bottom: none; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin-bottom: 24px; }
.stat-card { background: var(--card); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); text-align: center; }
.stat-card .num { font-size: 1.8rem; font-weight: 700; color: var(--primary); }
.stat-card .label { font-size: .85rem; color: var(--muted); margin-top: 4px; }
.footer { background: var(--card); border-top: 1px solid var(--border); padding: 20px 16px; text-align: center; color: var(--muted); font-size: .85rem; }
.empty { text-align: center; padding: 40px 20px; color: var(--muted); }
.empty-icon { font-size: 2.5rem; margin-bottom: 12px; }
.rules-content { background: var(--card); padding: 24px; border-radius: var(--radius); box-shadow: var(--shadow); line-height: 1.7; }
.rules-content h2 { margin-bottom: 12px; }
.rules-content ul { margin: 12px 0 12px 20px; }
.rules-content p { margin-bottom: 10px; }
.hidden { display: none !important; }
@media (max-width: 600px) {
  .hero h1 { font-size: 1.4rem; }
  .search-input-group { flex-direction: column; }
  .search-input-group .btn { width: 100%; }
  .header-inner { flex-direction: column; align-items: flex-start; }
  .nav { width: 100%; }
}
.test-banner {
  position: sticky; bottom: 0; z-index: 90;
  background: #5f6368; color: #fff; text-align: center;
  padding: 8px 12px; font-size: .85rem; font-weight: 500;
}
.disclaimer-banner {
  background: #fef7e0; color: #5c4100; border: 1px solid #f9ab00;
  border-radius: 10px; padding: 12px 14px; margin: 0 0 16px; font-size: .9rem; line-height: 1.45;
}
.suggest-wrap { position: relative; flex: 1; min-width: 180px; }
.suggest-list {
  position: absolute; left: 0; right: 0; top: 100%; z-index: 50;
  background: #fff; border: 1px solid var(--border); border-radius: 8px;
  box-shadow: var(--shadow); max-height: 260px; overflow-y: auto; display: none;
}
.suggest-list.show { display: block; }
.suggest-item {
  padding: 10px 12px; cursor: pointer; border-bottom: 1px solid #f1f3f4; text-align: left;
}
.suggest-item:hover, .suggest-item.active { background: #e8f0fe; }
.suggest-item .s-oem { font-family: monospace; color: var(--primary); font-weight: 600; }
.suggest-item .s-meta { font-size: .8rem; color: var(--muted); margin-top: 2px; }