:root {
  --navy: #0d2b4e;
  --navy-2: #143a63;
  --blue: #1b6ec2;
  --blue-light: #e8f1fb;
  --orange: #ff6b35;
  --ink: #1f2933;
  --gray: #5b6b7b;
  --line: #e3e9f0;
  --bg: #f5f7fa;
  --white: #ffffff;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(13, 43, 78, 0.08);
  --shadow-hover: 0 10px 30px rgba(13, 43, 78, 0.16);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  font-size: 16px;
}

a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--orange); }

.container { max-width: 1120px; margin: 0 auto; padding: 0 20px; }

/* ===== 顶部导航 ===== */
.topbar {
  background: var(--navy);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,.18);
}
.topbar .container {
  display: flex;
  align-items: center;
  height: 62px;
  gap: 22px;
}
.logo {
  font-size: 21px;
  font-weight: 800;
  color: #fff;
  white-space: nowrap;
  letter-spacing: .5px;
}
.logo span { color: var(--orange); }
.topnav { display: flex; gap: 20px; margin-left: auto; }
.topnav a { color: #cdd9e8; font-size: 15px; font-weight: 500; }
.topnav a:hover { color: #fff; }

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 55%, #1d4f86 100%);
  color: #fff;
  padding: 56px 0 64px;
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  right: -80px; top: -80px;
  width: 320px; height: 320px;
  background: radial-gradient(circle, rgba(255,107,53,.22), transparent 70%);
  border-radius: 50%;
}
.hero h1 { font-size: 40px; font-weight: 800; letter-spacing: 1px; margin-bottom: 12px; }
.hero .sub { font-size: 18px; color: #c9d8ec; margin-bottom: 30px; max-width: 640px; }

/* ===== 搜索框 ===== */
.search-wrap { position: relative; max-width: 680px; z-index: 2; }
.search-box {
  display: flex;
  background: #fff;
  border-radius: 999px;
  box-shadow: var(--shadow-hover);
  overflow: hidden;
}
.search-box input {
  flex: 1;
  border: none;
  outline: none;
  padding: 17px 24px;
  font-size: 16px;
  color: var(--ink);
  background: transparent;
}
.search-box button {
  border: none;
  background: var(--orange);
  color: #fff;
  padding: 0 30px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: background .2s;
}
.search-box button:hover { background: #e85a26; }
.hot-tags { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.hot-tags .label { color: #9fb6d4; font-size: 14px; }
.hot-tags a {
  background: rgba(255,255,255,.12);
  color: #e6eefb;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 14px;
  border: 1px solid rgba(255,255,255,.15);
}
.hot-tags a:hover { background: var(--orange); color: #fff; border-color: var(--orange); }

/* ===== 搜索结果下拉 ===== */
.search-results {
  position: absolute;
  top: calc(100% + 8px);
  left: 0; right: 0;
  background: #fff;
  border-radius: 14px;
  box-shadow: var(--shadow-hover);
  max-height: 420px;
  overflow-y: auto;
  display: none;
  z-index: 50;
  padding: 8px;
}
.search-results.show { display: block; }
.sr-item {
  display: block;
  padding: 12px 16px;
  border-radius: 10px;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}
.sr-item:last-child { border-bottom: none; }
.sr-item:hover { background: var(--blue-light); }
.sr-item .name { font-weight: 700; font-size: 15px; }
.sr-item .meta { font-size: 13px; color: var(--gray); margin-top: 2px; }
.sr-item .tag {
  display: inline-block;
  background: var(--blue-light);
  color: var(--blue);
  font-size: 12px;
  padding: 1px 8px;
  border-radius: 6px;
  margin-right: 6px;
}
.sr-empty { padding: 18px; color: var(--gray); text-align: center; }

/* ===== 区块 ===== */
.section { padding: 48px 0; }
.section.alt { background: #fff; }
.section h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.section h2::before {
  content: "";
  width: 5px; height: 22px;
  background: var(--orange);
  border-radius: 3px;
}
.section .sec-sub { color: var(--gray); margin-bottom: 24px; font-size: 15px; }

/* ===== 卡片网格 ===== */
.grid { display: grid; gap: 18px; }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  transition: transform .18s, box-shadow .18s, border-color .18s;
  display: block;
  color: var(--ink);
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); border-color: #c7d6ea; }
.card .ico {
  width: 44px; height: 44px;
  border-radius: 11px;
  background: var(--blue-light);
  color: var(--blue);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 800;
  margin-bottom: 12px;
}
.card h3 { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
.card .desc { font-size: 14px; color: var(--gray); }
.card .tags { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 6px; }
.card .tags span {
  background: #eef2f7;
  color: #46586b;
  font-size: 12px;
  padding: 3px 9px;
  border-radius: 6px;
}

/* ===== 数据看板 ===== */
.stats { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.stat {
  background: linear-gradient(135deg, var(--navy-2), #1d4f86);
  color: #fff;
  border-radius: var(--radius);
  padding: 26px 20px;
  text-align: center;
}
.stat .num { font-size: 32px; font-weight: 800; color: var(--orange); }
.stat .txt { font-size: 14px; color: #c9d8ec; margin-top: 4px; }

/* ===== 厂家卡片（首页推荐） ===== */
.factory {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  transition: transform .18s, box-shadow .18s;
}
.factory:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.factory .f-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.factory h3 { font-size: 18px; font-weight: 800; }
.factory .town {
  background: var(--blue-light);
  color: var(--blue);
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  white-space: nowrap;
}
.factory .f-desc { color: var(--gray); font-size: 14px; margin: 10px 0 14px; }
.factory .f-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.factory .f-tags span {
  background: #eef2f7; color: #46586b; font-size: 12px; padding: 3px 9px; border-radius: 6px;
}
.factory .f-foot { display: flex; justify-content: space-between; align-items: center; }
.factory .tel { font-size: 14px; color: var(--ink); font-weight: 600; }
.factory .tel::before { content: "📞 "; }
.factory .more {
  background: var(--navy); color: #fff; padding: 7px 16px; border-radius: 8px; font-size: 14px; font-weight: 600;
}
.factory .more:hover { background: var(--orange); color: #fff; }

/* ===== 面包屑 ===== */
.crumb { font-size: 14px; color: var(--gray); margin: 18px 0 0; }
.crumb a { color: var(--blue); }

/* ===== 详情页 ===== */
.detail-hero { background: #fff; border-bottom: 1px solid var(--line); padding: 34px 0 30px; }
.detail-hero h1 { font-size: 30px; font-weight: 800; }
.detail-hero .dh-sub { color: var(--gray); margin-top: 6px; }
.badge-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.badge {
  background: var(--blue-light); color: var(--blue);
  font-size: 13px; padding: 5px 12px; border-radius: 999px; font-weight: 600;
}
.info-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 22px; }
.info-box { background: var(--bg); border-radius: 12px; padding: 16px 18px; }
.info-box .k { font-size: 13px; color: var(--gray); }
.info-box .v { font-size: 16px; font-weight: 700; margin-top: 3px; }
.prod-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.prod-list .p {
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
  padding: 10px 14px; font-size: 14px;
}
.prod-list .p b { color: var(--navy); }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; margin-bottom: 12px; }
.faq-item h3 { font-size: 16px; color: var(--navy); margin-bottom: 6px; }
.faq-item p { color: #3c4a59; font-size: 15px; }
.contact-bar {
  background: var(--navy); color: #fff; border-radius: 14px;
  padding: 22px 26px; margin-top: 24px;
  display: flex; flex-wrap: wrap; gap: 20px; align-items: center;
}
.contact-bar .cb-item { font-size: 15px; }
.contact-bar .cb-item b { color: var(--orange); }
.btn {
  display: inline-block; background: var(--orange); color: #fff;
  padding: 11px 26px; border-radius: 10px; font-weight: 700; border: none; cursor: pointer;
}
.btn:hover { background: #e85a26; color: #fff; }

/* ===== 页脚 ===== */
.footer { background: var(--navy); color: #9fb6d4; padding: 40px 0 28px; margin-top: 20px; }
.footer .f-cols { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 30px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 12px; }
.footer a { color: #9fb6d4; font-size: 14px; display: block; margin-bottom: 7px; }
.footer a:hover { color: #fff; }
.footer .copy { border-top: 1px solid rgba(255,255,255,.1); margin-top: 24px; padding-top: 18px; font-size: 13px; color: #6f87a8; }

.no-results { text-align: center; padding: 50px 0; color: var(--gray); }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
  .grid.cols-3 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .footer .f-cols { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .topnav { display: none; }
  .hero { padding: 38px 0 44px; }
  .hero h1 { font-size: 28px; }
  .hero .sub { font-size: 15px; }
  .search-box button { padding: 0 18px; }
  .grid.cols-4, .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr; }
  .info-grid { grid-template-columns: 1fr; }
  .section { padding: 34px 0; }
  .section h2 { font-size: 21px; }
}