/* =========================================================
   优柯网站 · 设计系统
   风格来源：仿照 ucanbiotech.com 的配色与布局
   特点：深蓝主色 · 纯文字排版 · 极简边框卡片 · 无图标
   ========================================================= */

/* ---------- 1. 配色令牌 (来自参考站) ---------- */
:root {
  --c-primary:    #2C5282;   /* 深蓝主色 */
  --c-bg-banner:  #F7F9FC;   /* 横幅/页脚浅灰蓝背景 */
  --c-bg-white:   #FFFFFF;   /* 白色 */
  --c-text-dark:  #222222;   /* 标题深黑 */
  --c-text-main:  #333333;   /* 主要正文 */
  --c-text-sub:   #666666;   /* 次要文字 */
  --c-border:     #EEEEEE;   /* 边框线 */

  --font-family: "微软雅黑", "Microsoft YaHei", "PingFang SC", sans-serif;
}

/* ---------- 2. 基础重置 ---------- */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
body {
  font-family: var(--font-family);
  background: var(--c-bg-white);
  color: var(--c-text-main);
  line-height: 1.6;
}
html { scroll-behavior: smooth; -webkit-text-size-adjust:100%; }
a { text-decoration:none; transition:color .25s ease; }
img { max-width:100%; height:auto; }
ul, ol { list-style:none; }

/* ---------- 3. 布局容器 (与参考站一致) ---------- */
.wrap {
  width:90%;
  max-width:1200px;
  margin-left:auto;
  margin-right:auto;
}

/* ---------- 4. 导航栏 (仿参考站) ---------- */
.navbar {
  width:100%;
  height:100px;
  background:#fff;
  box-shadow:0 0 10px var(--c-border);
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 5%;
  position:sticky;
  top:0;
  z-index:99;
}
.nav-brand {
  display:flex;
  align-items:center;
  font-size:20px;
  font-weight:700;
  color:var(--c-text-dark);
}
.nav-brand .logo-img { height:60px; width:auto; object-fit:contain; }
.nav-links { display:flex; align-items:center; }
.nav-links a {
  margin-left:30px;
  color:var(--c-text-main);
  font-size:16px;
  text-decoration:none;
  transition:color .25s ease;
}
.nav-links a:hover,
.nav-links a.active { color:var(--c-primary); }

/* 汉堡菜单按钮 */
.nav-toggle {
  display:none;
  background:none;
  border:none;
  font-size:26px;
  color:var(--c-primary);
  cursor:pointer;
  padding:5px;
}

/* ---------- 5. Hero 横幅 (仿参考站) ---------- */
.banner {
  width:100%;
  background:var(--c-bg-banner);
  padding:40px 5%;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
}
.banner h1 {
  font-size:36px;
  color:var(--c-text-dark);
  margin-bottom:15px;
  line-height:1.3;
}
.banner p {
  font-size:18px;
  color:var(--c-text-sub);
}

/* 子页面横幅（稍小） */
.page-banner {
  width:100%;
  background:var(--c-bg-banner);
  padding:30px 5%;
  text-align:center;
}
.page-banner h1 { font-size:28px; color:var(--c-text-dark); margin-bottom:8px; }
.breadcrumb { font-size:14px; color:var(--c-text-sub); margin-bottom:10px; }
.breadcrumb a { color:var(--c-text-sub); }

/* ---------- 6. 区块通用 ---------- */
.section {
  width:90%;
  max-width:1200px;
  margin:80px auto;
}
.section-title {
  text-align:center;
  font-size:28px;
  color:var(--c-text-dark);
  margin-bottom:40px;
}

/* ---------- 7. 企业简介 (仿参考站) ---------- */
.intro h2 {
  font-size:28px;
  margin-bottom:14px;
  color:var(--c-text-dark);
  text-align:center;
}
.intro p {
  font-size:16px;
  color:var(--c-text-sub);
  max-width:800px;
  margin:0 auto 12px;
  text-align:left;
  text-indent:2em;
  line-height:1.7;
}

/* ---------- 8. 产品入口卡片 (仿参考站) ---------- */
.product-grid {
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:40px;
}
.product-card {
  border:1px solid var(--c-border);
  padding:40px;
  text-align:center;
  border-radius:8px;
  transition:box-shadow .3s ease, transform .25s ease;
  text-decoration:none;
  display:block;
  color:inherit;
}
.product-card:hover {
  box-shadow:0 5px 20px var(--c-border);
  transform:translateY(-3px);
}
.product-card h3 {
  font-size:20px;
  color:var(--c-text-dark);
  margin:15px 0 10px;
}
.product-card > p {
  font-size:15px;
  color:var(--c-text-sub);
  margin-bottom:18px;
}
.btn-primary {
  display:inline-block;
  padding:10px 25px;
  background:var(--c-primary);
  color:#fff;
  text-decoration:none;
  border-radius:4px;
  font-size:14px;
  transition:background .25s ease;
}
.btn-primary:hover { background:#234a70; color:#fff; }

/* ---------- 9. 核心优势 (仿参考站·纯文字4列) ---------- */
.adv-grid {
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  gap:30px;
}
.adv-item {
  padding:20px;
  text-align:center;
}
.adv-item h4 {
  font-size:18px;
  color:var(--c-text-dark);
  margin:10px 0 8px;
}
.adv-item p {
  font-size:14px;
  color:var(--c-text-sub);
}

/* ---------- 10. 时间轴 (关于页用) ---------- */
.timeline { max-width:700px; margin:0 auto; }
.timeline li {
  position:relative;
  padding-left:28px;
  padding-bottom:32px;
  border-left:2px solid var(--c-border);
  margin-left:12px;
}
.timeline li::before {
  content:"";
  position:absolute;
  left:-7px; top:6px;
  width:12px; height:12px;
  border-radius:50%;
  background:var(--c-primary);
  border:2px solid #fff;
  box-shadow:0 1px 3px rgba(0,0,0,.08);
}
.timeline .year { font-weight:700; font-size:16px; color:var(--c-text-dark); }
.timeline .desc { font-size:15px; color:var(--c-text-sub); margin-top:4px; }

/* ---------- 11. 表单 (联系页用) ---------- */
.form-wrap { max-width:600px; margin:0 auto; }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:16px; margin-bottom:16px; }
.form-group { margin-bottom:16px; }
.form-group label {
  display:block;
  margin-bottom:6px;
  font-size:14px;
  font-weight:600;
  color:var(--c-text-dark);
}
.form-group input,
.form-group textarea,
.form-group select {
  width:100%; padding:11px 13px;
  font-family:inherit; font-size:14px;
  color:var(--c-text-dark);
  border:1px solid var(--c-border);
  border-radius:4px;
  outline:none;
  transition:border-color .25s ease, box-shadow .25s ease;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(44,82,130,.08);
}
.form-group textarea { resize:vertical; min-height:110px; }
.error-msg { color:#C0392B; font-size:13px; margin-top:4px; display:none; }
.form-group.invalid .error-msg { display:block; }
.form-group.invalid input,
.form-group.invalid textarea { border-color:#C0392B; }
.form-note { font-size:13px; color:var(--c-text-sub); margin-top:10px; }
.success-msg {
  display:none; padding:14px; border-radius:4px;
  background:var(--c-bg-banner); color:var(--c-primary);
  font-weight:600; margin-top:16px; text-align:center;
}

/* ---------- 12. 页脚 (仿参考站·单行横排) ---------- */
.footer {
  width:100%;
  background:var(--c-bg-banner);
  padding:30px 5%;
  margin-top:80px;
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  align-items:center;
  gap:8px 24px;
}
.footer p {
  margin:0;
  color:var(--c-text-sub);
  font-size:14px;
}
.footer span.sep { color:var(--c-border); }

/* ---------- 12b. 搜索栏 (产品页用) ---------- */
.search-bar {
  display:flex;
  justify-content:center;
  align-items:center;
  gap:10px;
  margin-bottom:24px;
  flex-wrap:wrap;
}
.search-bar input {
  width:100%;
  max-width:460px;
  padding:10px 16px;
  border:1px solid var(--c-border);
  border-radius:4px;
  font-size:14px;
  font-family:inherit;
  color:var(--c-text-dark);
  outline:none;
  transition:border-color .25s ease, box-shadow .25s ease;
}
.search-bar input::placeholder { color:#aaa; }
.search-bar input:focus {
  border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(44,82,130,.08);
}
.search-bar button {
  padding:10px 22px;
  background:var(--c-primary);
  color:#fff;
  border:none;
  border-radius:4px;
  font-size:14px;
  cursor:pointer;
  font-family:inherit;
  transition:background .25s ease;
}
.search-bar button:hover { background:#234a70; }
.search-hint {
  width:100%;
  text-align:center;
  font-size:13px;
  color:var(--c-primary);
  font-weight:600;
}
.no-result {
  text-align:center;
  padding:50px 20px;
  color:var(--c-text-sub);
}
.no-result p { margin-bottom:0; }

/* ---------- 12c. 产品列表 (详情页用) ---------- */
.product-list {
  max-width:900px;
  margin:0 auto 20px;
  border:1px solid var(--c-border);
  border-radius:8px;
  overflow:hidden;
}
.product-item {
  display:flex;
  align-items:center;
  gap:16px;
  padding:15px 24px;
  border-bottom:1px solid var(--c-border);
  transition:background .2s ease;
}
.product-item:last-child { border-bottom:none; }
.product-item:hover { background:var(--c-bg-banner); }
.product-item .sku {
  flex:0 0 88px;
  font-weight:700;
  color:var(--c-primary);
  font-size:15px;
  letter-spacing:.5px;
}
.product-item .pname {
  flex:1;
  color:var(--c-text-main);
  font-size:15px;
}
.product-empty {}

/* ========== 产品列表表格样式 ========== */
.product-table-wrap {
  display: flex;
  justify-content: center;
  padding: 20px 0;
}
.product-table {
  width: 100%;
  max-width: 800px;
  border-collapse: collapse;
  border: 1px solid #d0d5dd;
  font-size: 14px;
  background: #fff;
}
.product-table thead { background-color: #f5f7fa; }
.product-table th {
  padding: 12px 24px; text-align: center; font-weight: 600; color: #333;
  border-bottom: 1px solid #d0d5dd; border-right: 1px solid #e8eaed;
  letter-spacing: 2px;
}
.product-table th:last-child { border-right: none; }
.product-table td {
  padding: 11px 24px; border-bottom: 1px solid #ebebeb;
  border-right: 1px solid #f0f0f0; color: #333; vertical-align: middle;
}
.product-table td:last-child { border-right: none; }
.product-table tbody tr:last-child td { border-bottom: none; }
.product-table tbody tr:hover { background-color: #f9fafb; }
.product-table td.sku-col { text-align: center; font-weight:600; color:#333; white-space:nowrap; }
.product-table td.cat-col {
  text-align:center;
  white-space:nowrap;
  color:#555;
  padding:11px 24px;
}
.product-table td.name-col { text-align:left; color:#222; }
/* 搜索结果面板（跨页产品匹配） */
.search-results-panel {
  max-width:900px;
  margin:30px auto 0;
  padding:24px;
  border:1px solid var(--c-border);
  border-radius:8px;
  background:#fff;
}
.search-results-panel h3 {
  font-size:17px;
  color:var(--c-text-dark);
  margin-bottom:14px;
}
.cat-tag {
  flex:0 0 auto;
  font-size:12px;
  color:var(--c-text-sub);
  background:var(--c-bg-banner);
  padding:2px 10px;
  border-radius:3px;
}

/* ---------- 13. 分类标签 (产品页用) ---------- */
.tag-bar { display:flex; justify-content:center; gap:12px; margin-bottom:36px; flex-wrap:wrap; }
.tag-btn {
  padding:8px 20px;
  border:1px solid var(--c-border);
  border-radius:4px;
  font-size:14px;
  color:var(--c-text-main);
  cursor:pointer;
  background:#fff;
  transition:all .25s ease;
}
.tag-btn:hover,
.tag-btn.on { background:var(--c-primary); color:#fff; border-color:var(--c-primary); }

/* ---------- 14. 两列内容区 (关于/联系页) ---------- */
.two-col {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:start;
}
.info-card {
  border:1px solid var(--c-border);
  padding:28px;
  border-radius:8px;
}
.info-card h3 { font-size:17px; color:var(--c-text-dark); margin-bottom:12px; }
.info-card ul li {
  padding:8px 0;
  font-size:14px; color:var(--c-text-sub);
  border-bottom:1px solid var(--c-border);
}
.info-card ul li:last-child { border-bottom:none; }

/* ---------- 15. 响应式 ≤768px (仿参考站断点) ---------- */
@media(max-width:768px){
  .navbar { height:80px; }
  .nav-toggle { display:block; }
  .nav-links {
    display:none;
    position:absolute; top:80px; left:0; width:100%;
    background:#fff;
    flex-direction:column;
    padding:10px 5%;
    box-shadow:0 4px 10px rgba(0,0,0,.08);
  }
  .nav-links.open { display:flex; }
  .nav-links a { margin:0 0 12px; font-size:16px; padding:8px 0; }

  .banner { padding:25px 10px; }
  .banner h1 { font-size:22px; }
  .banner p { font-size:14px; }

  .section { margin:40px auto; }
  .section-title, .intro h2 { font-size:22px; margin-bottom:20px; }
  .intro p { font-size:14px; }

  .product-grid { margin:40px auto 0; gap:20px; grid-template-columns:1fr !important; }
  .product-card { padding:24px; }
  .product-card h3 { font-size:17px; }

  .advantage, .section { margin:40px auto; }
  .adv-grid { grid-template-columns:repeat(2,1fr) !important; gap:15px; }
  .adv-item h4 { font-size:15px; }

  .footer { padding:20px 5%; gap:6px 18px; font-size:13px; }
  .footer p { font-size:13px; }
  .form-row { grid-template-columns:1fr; }
  .two-col { grid-template-columns:1fr; gap:24px; }
}
@media(max-width:480px){
  .navbar { height:70px; }
  .banner h1 { font-size:18px; }
  .banner p { font-size:13px; }
  .adv-grid { grid-template-columns:1fr !important; }
  .footer { flex-direction:row; flex-wrap:wrap; gap:4px 12px; }
  .footer p { font-size:12px; }
}