:root {
  /* 汽车用品主题：深空灰蓝 + 动感红 */
  --primary: #1E293B;
  --primary-dark: #0F172A;
  --secondary: #334155;
  --muted: #64748B;
  --accent: #DC2626;
  --accent-dark: #B91C1C;
  --accent-light: #FEF2F2;
  --bg: #F8FAFC;
  --card: #FFFFFF;
  --text: #0F172A;
  --text-light: #64748B;
  --border: #E2E8F0;
  --radius: 16px;
  --shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-hover: 0 14px 34px rgba(15, 23, 42, 0.16);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Arial, sans-serif; background: var(--bg); color: var(--text); line-height: 1.7; min-height: 100vh; display: flex; flex-direction: column; }
img { max-width: 100%; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* 顶部导航 */
.site-nav { background: var(--primary-dark); position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 10px rgba(0,0,0,.25); }
.site-nav .container { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.site-nav .brand { color: #fff; text-decoration: none; font-size: 1.3rem; font-weight: 700; letter-spacing: 1px; display: flex; align-items: center; gap: 8px; }
.site-nav .brand span { color: var(--accent); }
.nav-links { display: flex; gap: 24px; list-style: none; }
.nav-links a { color: #CBD5E1; text-decoration: none; font-size: .95rem; padding: 6px 2px; border-bottom: 2px solid transparent; transition: color .2s, border-color .2s; }
.nav-links a:hover { color: #fff; border-bottom-color: var(--accent); }

/* Hero 横幅 */
.hero { position: relative; overflow: hidden; background: linear-gradient(120deg, var(--primary-dark) 0%, #16202F 55%, #243147 100%); color: #fff; padding: 96px 0 72px; }
.hero::before { content: ""; position: absolute; inset: 0; background-image:
  linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
  linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 44px 44px; pointer-events: none; }
.hero::after { content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(circle at 82% 12%, rgba(220,38,38,.25), transparent 42%),
    linear-gradient(115deg, transparent 76%, rgba(220,38,38,.4) 76%, rgba(220,38,38,.4) 77.8%, transparent 77.8%),
    linear-gradient(115deg, transparent 80.5%, rgba(255,255,255,.07) 80.5%, rgba(255,255,255,.07) 81.8%, transparent 81.8%); }
.hero .container { position: relative; z-index: 1; }
.hero-eyebrow { display: inline-flex; align-items: center; gap: 10px; font-size: .88rem; letter-spacing: 3px; color: #94A3B8; font-weight: 500; }
.hero-eyebrow::before { content: ""; width: 28px; height: 2px; background: var(--accent); }
.hero h1 { font-size: 3rem; line-height: 1.2; margin: 14px 0 14px; letter-spacing: 1px; }
.hero-tagline { font-size: 1.05rem; opacity: .85; max-width: 620px; color: #CBD5E1; }
.hero-actions { margin-top: 30px; display: flex; gap: 14px; flex-wrap: wrap; }
.btn.ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.45); }
.btn.ghost:hover { border-color: #fff; background: rgba(255,255,255,.1); }

/* Hero 联系信息面板 */
.hero-panel { margin-top: 56px; display: flex; align-items: stretch; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border-radius: var(--radius); overflow: hidden; }
.contact-item { flex: 1 1 0; display: flex; align-items: center; gap: 14px; padding: 20px 24px; text-decoration: none; color: inherit; transition: background .2s; }
.contact-item:hover { background: rgba(255,255,255,.05); }
.contact-item + .contact-item { border-left: 1px solid rgba(255,255,255,.1); }
.contact-item .c-icon { flex: none; width: 42px; height: 42px; border-radius: 11px; background: rgba(220,38,38,.18); color: #F87171; display: flex; align-items: center; justify-content: center; }
.contact-item .c-icon svg { width: 21px; height: 21px; }
.contact-item .c-text small { display: block; font-size: .78rem; letter-spacing: 1px; color: #94A3B8; margin-bottom: 2px; }
.contact-item .c-text strong { display: block; font-size: .95rem; font-weight: 600; color: #fff; line-height: 1.5; }
.contact-item.address { flex: 1.5 1 0; }

/* 区块 */
.section { padding: 64px 0; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 32px; flex-wrap: wrap; }
.section-head .section-title { text-align: left; font-size: 1.7rem; margin-bottom: 4px; }
.section-head .section-sub { text-align: left; color: var(--text-light); margin: 0; }
.section-title { text-align: center; font-size: 1.7rem; margin-bottom: 8px; }
.section-sub { text-align: center; color: var(--text-light); margin-bottom: 36px; }
.section-link { color: var(--accent); text-decoration: none; font-size: .95rem; font-weight: 600; white-space: nowrap; transition: color .2s; }
.section-link:hover { color: var(--accent-dark); }

/* 服务保障 */
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 20px; }
.feature-item { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 22px; box-shadow: var(--shadow); transition: transform .25s, box-shadow .25s, border-color .25s; }
.feature-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: #CBD5E1; }
.feature-item .icon { width: 44px; height: 44px; border-radius: 12px; background: var(--accent-light); color: var(--accent); display: flex; align-items: center; justify-content: center; }
.feature-item .icon svg { width: 24px; height: 24px; }
.feature-item h4 { margin: 12px 0 4px; font-size: 1.05rem; color: var(--text); }
.feature-item p { color: var(--text-light); font-size: .9rem; }

/* 卡片网格 */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 24px; }
.card { background: var(--card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: transform .25s, box-shadow .25s; display: flex; flex-direction: column; }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
/* 整个卡片可点击（全部商品/搜索页） */
a.card { text-decoration: none; color: inherit; cursor: pointer; }
a.card h3 { color: var(--text); }
.card > a { display: block; overflow: hidden; }
.card img { width: 100%; height: 190px; object-fit: cover; display: block; transition: transform .35s ease; }
a.card:hover img, .card > a:hover img { transform: scale(1.05); }
.card-body { padding: 18px; display: flex; flex-direction: column; flex: 1; gap: 10px; }
.card h3 { font-size: 1.15rem; margin-bottom: 2px; }
.card .price { color: var(--accent); font-weight: 700; font-size: 1.05rem; }
.card .tags { display: flex; flex-wrap: wrap; gap: 6px; }

/* 标签 / 筛选 chip */
.tag { display: inline-block; padding: 3px 12px; border-radius: 999px; background: #F1F5F9; color: var(--secondary); font-size: .8rem; text-decoration: none; transition: background .2s, color .2s; }
a.tag:hover { background: var(--primary); color: #fff; }

/* 按钮 */
.btn { display: inline-block; padding: 11px 26px; border-radius: 999px; background: var(--primary); color: #fff; text-decoration: none; font-size: .92rem; transition: background .2s, transform .2s; border: none; cursor: pointer; font-family: inherit; }
.btn:hover { background: var(--secondary); }
.btn.accent { background: var(--accent); }
.btn.accent:hover { background: var(--accent-dark); }

/* 店铺信息 */
.store-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.store-item { background: var(--card); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.store-item .icon { font-size: 1.6rem; }
.store-item h4 { margin: 8px 0 4px; color: var(--primary); }
.store-item p { color: var(--text-light); font-size: .95rem; }
.map-wrap { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); margin-top: 24px; }
.map-wrap iframe { display: block; width: 100%; height: 320px; border: 0; }

/* 底部 CTA 条 */
.cta-band { background: linear-gradient(120deg, var(--primary-dark), var(--primary)); color: #fff; text-align: center; padding: 56px 20px; margin-top: 24px; }
.cta-band h2 { font-size: 1.6rem; margin-bottom: 8px; }
.cta-band p { color: #CBD5E1; margin-bottom: 24px; }

/* 详情页 */
.breadcrumb { width: min(860px, 100%); margin: 24px auto 0; padding: 0 20px; font-size: .9rem; color: var(--text-light); text-align: left; }
.breadcrumb a { color: var(--secondary); text-decoration: none; transition: color .2s; }
.breadcrumb a:hover { color: var(--accent); }
.single { max-width: 860px; margin: 24px auto 40px; background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.single img.cover { width: 100%; max-height: 420px; object-fit: cover; }
.single-body { padding: 36px; }
.single-body h1 { font-size: 1.9rem; margin-bottom: 10px; }
.single-body .meta { color: var(--text-light); font-size: .9rem; margin-bottom: 16px; }
.single-body .content { margin-top: 24px; }
.single-body .content h2 { margin: 24px 0 10px; font-size: 1.3rem; border-left: 4px solid var(--accent); padding-left: 12px; }
.single-body .content p { margin-bottom: 14px; }
.single-body .content ul { margin: 0 0 14px 22px; }
.single-body .content img { max-width: 100%; border-radius: 10px; }

/* 搜索页 */
.search-box { max-width: 720px; margin: 0 auto 12px; position: relative; }
.search-input { width: 100%; padding: 14px 20px; font-size: 1rem; border: 2px solid var(--border); border-radius: 999px; outline: none; transition: border-color .2s, box-shadow .2s; background: var(--card); color: var(--text); font-family: inherit; }
.search-input:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(30, 41, 59, .08); }
.search-input::placeholder { color: var(--text-light); }

/* 筛选气泡 */
.filter-bubbles { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; max-width: 720px; margin: 0 auto 18px; }
.bubble { display: inline-flex; align-items: center; gap: 6px; padding: 5px 7px 5px 13px; border-radius: 999px; background: var(--card); border: 1px solid var(--border); font-size: .85rem; box-shadow: var(--shadow); }
.bubble-tag { border-color: #CBD5E1; background: #F8FAFC; }
.bubble .b-type { color: var(--muted); font-size: .75rem; }
.bubble .b-value { font-weight: 600; color: var(--text); }
.bubble .b-remove { width: 18px; height: 18px; border: none; border-radius: 50%; background: #F1F5F9; color: var(--muted); cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 10px; line-height: 1; padding: 0; transition: background .2s, color .2s, transform .2s; }
.bubble .b-remove:hover { background: var(--accent); color: #fff; transform: scale(1.1); }

/* 联想下拉框 */
.search-dropdown { position: absolute; top: calc(100% + 6px); left: 0; right: 0; background: var(--card); border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow-hover); z-index: 50; max-height: 340px; overflow-y: auto; text-align: left; }
.suggest-group { padding: 12px 18px 4px; font-size: .74rem; letter-spacing: 2px; color: var(--muted); }
.suggest-item { display: flex; align-items: center; gap: 12px; padding: 10px 18px; cursor: pointer; transition: background .15s; }
.suggest-item:hover, .suggest-item.active { background: #F1F5F9; }
.suggest-item img { width: 42px; height: 42px; object-fit: cover; border-radius: 9px; flex: none; }
.suggest-item .s-icon { width: 34px; height: 34px; border-radius: 9px; background: var(--accent-light); color: var(--accent); display: flex; align-items: center; justify-content: center; flex: none; }
.suggest-item .s-main { font-size: .92rem; color: var(--text); line-height: 1.4; }
.suggest-item .s-sub { font-size: .78rem; color: var(--muted); }
.search-stats { text-align: center; color: var(--text-light); margin-bottom: 20px; font-size: .9rem; scroll-margin-top: 76px; }
.empty { text-align: center; color: var(--text-light); padding: 60px 0; }

/* 分页导航 */
.pagination { display: flex; justify-content: center; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 36px; }
.page-btn { min-width: 42px; height: 42px; padding: 0 14px; border: 1px solid var(--border); border-radius: 12px; background: var(--card); color: var(--secondary); font-size: .92rem; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; transition: border-color .2s, color .2s, background .2s, transform .2s; font-family: inherit; }
.page-btn:hover:not(:disabled):not(.active) { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }
.page-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 700; }
.page-btn:disabled { opacity: .4; cursor: default; }
.page-ellipsis { color: var(--muted); padding: 0 2px; }

/* 页脚 */
.site-footer { background: var(--primary-dark); color: #94A3B8; text-align: center; padding: 28px 20px; margin-top: auto; font-size: .9rem; }
.site-footer a { color: #E2E8F0; text-decoration: none; transition: color .2s; }
.site-footer a:hover { color: #fff; }

@media (max-width: 900px) {
  .hero::after { background: radial-gradient(circle at 85% 0%, rgba(220,38,38,.2), transparent 45%); }
}

@media (max-width: 640px) {
  .hero { padding: 64px 0 52px; }
  .hero h1 { font-size: 2rem; }
  .nav-links { gap: 14px; }
  .single-body { padding: 24px; }
  .section { padding: 48px 0; }
  .hero-actions .btn { flex: 1; text-align: center; }
  .hero-panel { flex-direction: column; }
  .contact-item { padding: 16px 18px; }
  .contact-item + .contact-item { border-left: none; border-top: 1px solid rgba(255,255,255,.1); }
}