/* =====================================================================
   山东潍坊正东盐化有限公司  PBootCMS 模板样式表
   主色 #0a5c7a / 强调色 #d97706 / 工业化工专业风格 / 响应式
   ===================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root {
  --primary: #0a5c7a;          /* 深蓝青 主色 */
  --primary-dark: #084862;
  --primary-light: #0e7da3;
  --primary-soft: #e6f1f6;
  --accent: #d97706;           /* 琥珀橙 强调色 */
  --accent-dark: #b85f00;
  --accent-soft: #fdf2e2;

  --bg: #ffffff;
  --bg-alt: #f7fafc;
  --bg-dark: #0c2630;

  --text: #1a2a3a;             /* 主文字 */
  --text-muted: #5a6a7a;       /* 次文字 */
  --border: #e2e8f0;
  --border-strong: #cbd5e1;

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;

  --shadow-sm: 0 2px 8px rgba(10, 92, 122, .06);
  --shadow: 0 8px 28px rgba(10, 92, 122, .10);
  --shadow-lg: 0 18px 50px rgba(10, 92, 122, .16);

  --container: 1200px;
  --gap: 24px;
  --header-h: 72px;

  --font: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  --transition: .28s cubic-bezier(.4, 0, .2, 1);
}

/* ---------- 2. 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; border: 0; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, h6 { margin: 0 0 .6em; font-weight: 700; line-height: 1.3; color: var(--text); }
p { margin: 0 0 1em; }
button { font-family: inherit; cursor: pointer; }

/* ---------- 3. 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}
.section { padding: 72px 0; }
.section--alt { background: var(--bg-alt); }
.section--dark { background: var(--bg-dark); color: #e8f1f6; }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 48px; }
.section-head .eyebrow {
  display: inline-block;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 3px;
  font-size: 13px;
  margin-bottom: 12px;
}
.section-head h2 { font-size: 32px; }
.section-head p { color: var(--text-muted); margin: 0; }

/* ---------- 4. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 700;
  border: 2px solid transparent;
  transition: all var(--transition);
  cursor: pointer;
  white-space: nowrap;
}
.btn .ico { width: 18px; height: 18px; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,.5); }
.btn-outline:hover { background: #fff; color: var(--primary); border-color: #fff; }
.btn-ghost { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-ghost:hover { background: var(--primary); color: #fff; }

/* ---------- 5. 图标 ---------- */
.ico { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; display: inline-block; vertical-align: middle; flex: none; }

/* ---------- 6. 顶部联系条 ---------- */
.topbar { background: var(--bg-dark); color: #c4d6de; font-size: 13px; }
.topbar .container { display: flex; justify-content: space-between; align-items: center; min-height: 40px; flex-wrap: wrap; gap: 8px; }
.topbar a { color: #c4d6de; }
.topbar a:hover { color: #fff; }
.topbar-left { display: flex; gap: 24px; flex-wrap: wrap; }
.topbar-left span { display: inline-flex; align-items: center; gap: 6px; }
.topbar-left .ico { width: 15px; height: 15px; color: var(--accent); }
.topbar-right { display: flex; gap: 14px; align-items: center; }

/* ---------- 7. 导航 / 头部 ---------- */
.site-header { position: sticky; top: 0; z-index: 1000; background: #fff; box-shadow: var(--shadow-sm); transition: box-shadow var(--transition), background var(--transition); }
.site-header.is-stuck { box-shadow: var(--shadow); }
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }

.logo { display: flex; align-items: center; gap: 12px; }
.logo-mark {
  display: flex; flex-direction: column; justify-content: center;
  width: 46px; height: 46px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff; font-weight: 800; font-size: 15px; line-height: 1; text-align: center;
  box-shadow: var(--shadow-sm);
}
.logo-text { display: flex; flex-direction: column; }
.logo-title { font-size: 19px; font-weight: 800; color: var(--text); letter-spacing: 1px; }
.logo-sub { font-size: 11px; color: var(--text-muted); letter-spacing: 1px; }

.main-nav > ul { display: flex; align-items: center; gap: 4px; }
.main-nav > ul > li { position: relative; }
.main-nav > ul > li > a {
  display: flex; align-items: center; gap: 4px;
  padding: 10px 16px; color: var(--text); font-weight: 600; font-size: 15px;
  border-radius: var(--radius-sm); transition: all var(--transition); position: relative;
}
.main-nav > ul > li > a::after {
  content: ""; position: absolute; left: 16px; right: 16px; bottom: 4px; height: 2px;
  background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform var(--transition);
}
.main-nav > ul > li:hover > a,
.main-nav > ul > li.active > a { color: var(--primary); }
.main-nav > ul > li:hover > a::after,
.main-nav > ul > li.active > a::after { transform: scaleX(1); }

/* 二级下拉 */
.sub-nav {
  position: absolute; top: 100%; left: 0; min-width: 180px;
  background: #fff; border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 8px 0; opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all var(--transition); border: 1px solid var(--border);
}
.main-nav > ul > li:hover .sub-nav { opacity: 1; visibility: visible; transform: translateY(0); }
.sub-nav li a {
  display: block; padding: 9px 20px; color: var(--text-muted); font-size: 14px; font-weight: 500;
  transition: all var(--transition);
}
.sub-nav li a:hover { background: var(--primary-soft); color: var(--primary); padding-left: 26px; }

/* 汉堡菜单 */
.nav-toggle { display: none; width: 44px; height: 44px; border: 0; background: transparent; position: relative; }
.nav-toggle span { position: absolute; left: 10px; right: 10px; height: 2px; background: var(--primary); border-radius: 2px; transition: all var(--transition); }
.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 21px; }
.nav-toggle span:nth-child(3) { top: 28px; }
.nav-toggle.open span:nth-child(1) { top: 21px; transform: rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { top: 21px; transform: rotate(-45deg); }

/* ---------- 8. Hero 横幅 ---------- */
.hero { position: relative; background: linear-gradient(135deg, #07384a 0%, #0a5c7a 55%, #0e7da3 100%); color: #fff; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(circle at 80% 20%, rgba(217,119,6,.25), transparent 40%),
                    radial-gradient(circle at 10% 90%, rgba(14,125,163,.45), transparent 45%);
}
.hero::after {
  content: ""; position: absolute; inset: 0; opacity: .08;
  background-image: linear-gradient(0deg, transparent 24px, #fff 25px, transparent 26px),
                    linear-gradient(90deg, transparent 24px, #fff 25px, transparent 26px);
  background-size: 48px 48px;
}
.hero .container { position: relative; z-index: 2; display: grid; grid-template-columns: 1.5fr 1fr; gap: 48px; align-items: center; padding: 84px 20px; }
.hero-content { max-width: 620px; }
.hero h1 { font-size: 44px; line-height: 1.2; margin-bottom: 14px; }
.hero h1 .accent { color: var(--accent); }
.hero-sub { font-size: 18px; color: #cfe3ec; margin-bottom: 20px; }
.hero-desc { color: #b9d4de; margin-bottom: 24px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
.hero-tags .tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 16px; border-radius: 30px; font-size: 13px; font-weight: 600;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.25); color: #fff;
}
.hero-tags .tag::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

/* Hero 数据卡片 */
.hero-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.hero-card {
  background: rgba(255,255,255,.10); backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,.18); border-radius: var(--radius-lg);
  padding: 24px 20px; text-align: center; transition: transform var(--transition);
}
.hero-card:hover { transform: translateY(-6px); background: rgba(255,255,255,.16); }
.hero-card .num { font-size: 34px; font-weight: 800; color: #fff; line-height: 1; }
.hero-card .num small { font-size: 16px; color: var(--accent); font-weight: 700; margin-left: 2px; }
.hero-card .label { font-size: 13px; color: #cfe3ec; margin-top: 8px; }

/* ---------- 9. 关于我们 ---------- */
.about-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center; }
.about-text h2 { font-size: 30px; margin-bottom: 18px; }
.about-text p { color: var(--text-muted); }
.about-media {
  position: relative; border-radius: var(--radius-lg); overflow: hidden; min-height: 360px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex; align-items: center; justify-content: center; color: #fff; box-shadow: var(--shadow);
}
.about-media .ph-icon { width: 72px; height: 72px; opacity: .85; margin-bottom: 12px; }
.about-media .ph-text { font-size: 15px; letter-spacing: 2px; }
.about-media::after {
  content: ""; position: absolute; inset: 0; opacity: .12;
  background-image: repeating-linear-gradient(45deg, #fff 0 2px, transparent 2px 22px);
}
.feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 30px; }
.feature-item { display: flex; gap: 14px; align-items: flex-start; }
.feature-icon {
  flex: none; width: 50px; height: 50px; border-radius: 12px;
  background: var(--primary-soft); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
}
.feature-icon .ico { width: 26px; height: 26px; }
.feature-item h4 { margin: 2px 0 4px; font-size: 16px; }
.feature-item p { margin: 0; font-size: 13px; color: var(--text-muted); }

/* ---------- 10. 产品中心 ---------- */
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); }
/* 列表页 3 列变体（内联样式会压掉响应式规则，故改用类） */
.product-grid--3 { grid-template-columns: repeat(3, 1fr); }
.product-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex; flex-direction: column; position: relative;
}
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
.product-media {
  position: relative; aspect-ratio: 4 / 3; overflow: hidden;
  background: linear-gradient(135deg, var(--primary-soft), #d4e8f0);
  display: flex; align-items: center; justify-content: center; color: var(--primary);
}
.product-media img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition); }
.product-card:hover .product-media img { transform: scale(1.06); }
.product-media .ph-icon { width: 56px; height: 56px; opacity: .8; }
.product-badge {
  position: absolute; top: 12px; left: 12px; z-index: 2;
  padding: 4px 12px; border-radius: 30px; font-size: 12px; font-weight: 700; color: #fff;
}
.product-badge--hot { background: var(--accent); }
.product-badge--rec { background: var(--primary); }
.product-body { padding: 18px; display: flex; flex-direction: column; flex: 1; }
.product-cat { font-size: 12px; color: var(--accent); font-weight: 700; margin-bottom: 6px; }
.product-body h3 { font-size: 17px; margin: 0 0 8px; }
.product-body h3 a { color: var(--text); }
.product-body h3 a:hover { color: var(--primary); }
.product-body p { font-size: 13px; color: var(--text-muted); margin: 0 0 14px; flex: 1; }
.product-more { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 600; color: var(--primary); }
.product-more .ico { width: 16px; height: 16px; transition: transform var(--transition); }
.product-card:hover .product-more .ico { transform: translateX(4px); }

/* ---------- 11. 荣誉资质条 ---------- */
.honor-bar { background: var(--primary); color: #fff; }
.honor-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding: 40px 0; text-align: center; }
.honor-item { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.honor-item .ico { width: 44px; height: 44px; color: var(--accent); }
.honor-item h4 { margin: 0; font-size: 18px; }
.honor-item p { margin: 0; font-size: 13px; color: #bcd6e0; }

/* ---------- 12. 新闻中心 ---------- */
.news-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap); }
.news-item { display: flex; gap: 18px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; transition: all var(--transition); }
.news-item:hover { box-shadow: var(--shadow); transform: translateY(-4px); border-color: var(--primary-light); }
.news-thumb { flex: none; width: 130px; height: 96px; border-radius: var(--radius-sm); overflow: hidden; background: linear-gradient(135deg, var(--primary-soft), #d4e8f0); display: flex; align-items: center; justify-content: center; color: var(--primary); }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-thumb .ico { width: 34px; height: 34px; }
.news-body { display: flex; flex-direction: column; }
.news-date { font-size: 12px; color: var(--accent); font-weight: 700; }
.news-body h3 { font-size: 16px; margin: 4px 0 6px; line-height: 1.4; }
.news-body h3 a { color: var(--text); }
.news-body h3 a:hover { color: var(--primary); }
.news-body p { font-size: 13px; color: var(--text-muted); margin: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ---------- 13. 客户案例 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap); }
.case-card { position: relative; border-radius: var(--radius); overflow: hidden; min-height: 280px; box-shadow: var(--shadow-sm); transition: transform var(--transition); }
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.case-bg { position: absolute; inset: 0; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); }
.case-bg::after { content: ""; position: absolute; inset: 0; opacity: .14; background-image: repeating-linear-gradient(45deg, #fff 0 2px, transparent 2px 24px); }
/* 图片背景模式：铺满 + 居中裁切，去掉斜纹装饰（渐变压暗由行内 background-image 控制） */
.case-bg--img { background-size: cover; background-position: center; }
.case-bg--img::after { display: none; }
.case-content { position: relative; z-index: 2; padding: 28px; height: 100%; display: flex; flex-direction: column; justify-content: flex-end; color: #fff; }
.case-content h3 { color: #fff; font-size: 20px; margin-bottom: 8px; }
.case-desc {
  font-size: 14px; color: #d7e8ef; max-height: 0; opacity: 0; overflow: hidden;
  transition: all var(--transition);
}
.case-card:hover .case-desc { max-height: 140px; opacity: 1; margin-top: 6px; }
.case-tag { align-self: flex-start; background: var(--accent); color: #fff; font-size: 12px; font-weight: 700; padding: 3px 12px; border-radius: 30px; margin-bottom: auto; }

/* ---------- 14. CTA 横幅 ---------- */
.cta-band { background: linear-gradient(135deg, var(--accent), var(--accent-dark)); color: #fff; text-align: center; }
.cta-band .container { padding: 56px 20px; }
.cta-band h2 { color: #fff; font-size: 30px; margin-bottom: 10px; }
.cta-band p { color: #fde9d4; margin-bottom: 22px; }
.cta-phone { display: inline-flex; align-items: center; gap: 12px; font-size: 36px; font-weight: 800; color: #fff; }
.cta-phone .ico { width: 38px; height: 38px; }

/* ---------- 15. 页脚 ---------- */
.site-footer { background: var(--bg-dark); color: #aac3ce; font-size: 14px; }
.footer-cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding: 56px 0 40px; }
.footer-col h4 { color: #fff; font-size: 17px; margin-bottom: 18px; position: relative; padding-left: 14px; }
.footer-col h4::before { content: ""; position: absolute; left: 0; top: 4px; bottom: 4px; width: 4px; border-radius: 2px; background: var(--accent); }
.footer-col p { color: #aac3ce; font-size: 13px; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: #aac3ce; font-size: 14px; }
.footer-links a:hover { color: var(--accent); padding-left: 4px; }
.footer-contact li { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 14px; color: #aac3ce; font-size: 13px; }
.footer-contact .ico { width: 18px; height: 18px; color: var(--accent); flex: none; margin-top: 3px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 20px 0; }
.footer-bottom .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; font-size: 13px; color: #8aa3ad; }
.footer-bottom a { color: #8aa3ad; }
.footer-bottom a:hover { color: var(--accent); }

/* ---------- 16. 面包屑 ---------- */
.breadcrumb { background: var(--bg-alt); border-bottom: 1px solid var(--border); }
.breadcrumb .container { padding: 14px 20px; font-size: 13px; color: var(--text-muted); }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { margin: 0 8px; color: var(--border-strong); }

/* ---------- 17. 内页通用布局 ---------- */
.page-hero { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; }
.page-hero .container { padding: 56px 20px; }
.page-hero h1 { color: #fff; font-size: 32px; margin: 0; }
.page-hero .sub { color: #cfe3ec; margin: 8px 0 0; font-size: 15px; }

.layout { display: grid; grid-template-columns: 1fr 320px; gap: 40px; padding: 56px 0; align-items: start; }
.layout--list { grid-template-columns: 260px 1fr; }

/* ---------- 18. 列表页 ---------- */
.filter-bar { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; position: sticky; top: 100px; }
.filter-bar h4 { font-size: 16px; margin-bottom: 14px; padding-bottom: 10px; border-bottom: 1px solid var(--border); }
.filter-list li { margin-bottom: 4px; }
.filter-list a { display: block; padding: 9px 14px; border-radius: var(--radius-sm); color: var(--text-muted); font-size: 14px; transition: all var(--transition); }
.filter-list a:hover, .filter-list a.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }

.list-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--gap); }
.list-card { display: flex; gap: 18px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; transition: all var(--transition); }
.list-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); border-color: var(--primary-light); }
.list-thumb { flex: none; width: 150px; height: 120px; border-radius: var(--radius-sm); overflow: hidden; background: linear-gradient(135deg, var(--primary-soft), #d4e8f0); display: flex; align-items: center; justify-content: center; color: var(--primary); }
.list-thumb img { width: 100%; height: 100%; object-fit: cover; }
.list-thumb .ico { width: 38px; height: 38px; }
.list-info { display: flex; flex-direction: column; }
.list-cat { font-size: 12px; color: var(--accent); font-weight: 700; }
.list-info h3 { font-size: 17px; margin: 4px 0 8px; }
.list-info h3 a { color: var(--text); }
.list-info h3 a:hover { color: var(--primary); }
.list-info p { font-size: 13px; color: var(--text-muted); margin: 0 0 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; flex: 1; }
.list-meta { display: flex; justify-content: space-between; align-items: center; font-size: 12px; color: var(--text-muted); }
.list-meta .read { color: var(--primary); font-weight: 600; display: inline-flex; align-items: center; gap: 4px; }
.list-meta .read .ico { width: 14px; height: 14px; }

/* 分页 */
.pagination { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; margin-top: 36px; }
.pagination a, .pagination span, .pagination info { }
.pagination a, .pagination .this, .pagination .no {
  display: inline-flex; align-items: center; justify-content: center; min-width: 40px; height: 40px;
  padding: 0 12px; border-radius: var(--radius-sm); border: 1px solid var(--border); color: var(--text);
  font-size: 14px; transition: all var(--transition);
}
.pagination a:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-soft); }
.pagination .this { background: var(--primary); border-color: var(--primary); color: #fff; font-weight: 700; }
.pagination .no { color: var(--border-strong); cursor: not-allowed; }
.pagination .omit { padding: 0 6px; color: var(--text-muted); }

/* ---------- 19. 详情页 ---------- */
.article { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 36px; }
.article h1 { font-size: 28px; margin-bottom: 16px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 18px; font-size: 13px; color: var(--text-muted); padding-bottom: 18px; margin-bottom: 22px; border-bottom: 1px dashed var(--border); }
.article-meta span { display: inline-flex; align-items: center; gap: 5px; }
.article-meta .ico { width: 15px; height: 15px; color: var(--accent); }
.article-content { font-size: 15px; line-height: 1.9; color: #2b3a48; }
.article-content img { max-width: 100%; border-radius: var(--radius-sm); margin: 16px 0; }
.article-content p { margin: 0 0 1.1em; }
.article-tags { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--border); display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.article-tags .label { font-weight: 700; color: var(--text); }
.tag-chip { display: inline-block; padding: 5px 14px; border-radius: 30px; background: var(--primary-soft); color: var(--primary); font-size: 13px; transition: all var(--transition); }
.tag-chip:hover { background: var(--primary); color: #fff; }

.pre-next { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 28px; }
.pre-next a { display: flex; flex-direction: column; gap: 4px; padding: 16px 20px; border: 1px solid var(--border); border-radius: var(--radius); transition: all var(--transition); }
.pre-next a:hover { border-color: var(--primary); background: var(--primary-soft); }
.pre-next .pn-label { font-size: 12px; color: var(--text-muted); }
.pre-next .pn-title { font-weight: 600; color: var(--text); }
.pre-next a:last-child { text-align: right; }

/* 侧边栏 */
.sidebar { display: flex; flex-direction: column; gap: 24px; position: sticky; top: 100px; }
.side-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.side-card .side-head { background: var(--primary); color: #fff; padding: 14px 18px; font-weight: 700; font-size: 16px; }
.side-card .side-body { padding: 18px; }
.side-list li { margin-bottom: 12px; padding-bottom: 12px; border-bottom: 1px dashed var(--border); }
.side-list li:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: 0; }
.side-list a { display: flex; gap: 10px; font-size: 14px; color: var(--text); align-items: center; }
.side-list a:hover { color: var(--primary); }
.side-list .ico { width: 14px; height: 14px; color: var(--accent); flex: none; }
.side-contact li { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 14px; font-size: 13px; color: var(--text-muted); }
.side-contact .ico { width: 18px; height: 18px; color: var(--primary); flex: none; margin-top: 2px; }
.side-contact strong { color: var(--text); display: block; }

/* ---------- 20. 单页(about) ---------- */
.single-content { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 40px; font-size: 15px; line-height: 1.95; }
.single-content img { max-width: 100%; border-radius: var(--radius-sm); margin: 16px 0; }
.single-content h2, .single-content h3 { margin-top: 1.2em; }

/* ---------- 21. 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: start; }
.contact-form { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; }
.form-row { margin-bottom: 18px; }
.form-row label { display: block; font-weight: 600; margin-bottom: 8px; font-size: 14px; }
.form-row label .req { color: var(--accent); }
.form-control {
  width: 100%; padding: 12px 14px; border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  font-size: 14px; font-family: inherit; color: var(--text); background: #fff; transition: all var(--transition);
}
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
textarea.form-control { resize: vertical; min-height: 130px; }
.form-row.half { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-hint { font-size: 12px; color: var(--accent); margin-top: 6px; min-height: 16px; }
.form-success { display: none; padding: 14px 16px; border-radius: var(--radius-sm); background: #e7f6ec; color: #1f7a3d; border: 1px solid #b6e3c4; margin-bottom: 18px; }
.form-success.show { display: block; }

.contact-info { display: flex; flex-direction: column; gap: 20px; }
.info-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; }
.info-card h3 { font-size: 18px; margin-bottom: 16px; }
.info-card ul li { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 14px; font-size: 14px; color: var(--text-muted); }
.info-card ul li .ico { width: 20px; height: 20px; color: var(--primary); flex: none; margin-top: 2px; }
.info-card ul li strong { color: var(--text); }
.map-placeholder {
  border-radius: var(--radius); overflow: hidden; min-height: 240px; position: relative;
  background: linear-gradient(135deg, #0a5c7a, #0e7da3); color: #fff;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px;
}
.map-placeholder .ico { width: 48px; height: 48px; opacity: .9; }
.map-placeholder span { font-size: 14px; letter-spacing: 1px; }

/* ---------- 22. 搜索页 ---------- */
.search-box { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; margin-bottom: 30px; }
.search-form { display: flex; gap: 12px; }
.search-form input { flex: 1; }
.search-result-meta { font-size: 14px; color: var(--text-muted); margin-bottom: 20px; }
.search-result-meta strong { color: var(--accent); }
.search-empty { text-align: center; padding: 60px 20px; color: var(--text-muted); }
.search-empty .ico { width: 56px; height: 56px; color: var(--border-strong); margin-bottom: 14px; }

/* ---------- 23. 留言成功页 ---------- */
.msg-wrap { max-width: 560px; margin: 0 auto; text-align: center; padding: 80px 20px; }
.msg-icon { width: 90px; height: 90px; border-radius: 50%; background: #e7f6ec; color: #1f7a3d; display: flex; align-items: center; justify-content: center; margin: 0 auto 24px; }
.msg-icon .ico { width: 46px; height: 46px; }
.msg-wrap h1 { font-size: 28px; }
.msg-wrap p { color: var(--text-muted); }
.msg-wrap .btn { margin-top: 18px; }

/* ---------- 24. 返回顶部 ---------- */
.back-top {
  position: fixed; right: 24px; bottom: 24px; width: 48px; height: 48px; border-radius: 50%;
  background: var(--primary); color: #fff; border: 0; display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translateY(12px); transition: all var(--transition); z-index: 900;
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--accent); }
.back-top .ico { width: 22px; height: 22px; }

/* ---------- 25. 滚动揭示动画 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ---------- 26. 滚动条美化 ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #eef3f6; }
::-webkit-scrollbar-thumb { background: #9fb6c2; border-radius: 10px; border: 2px solid #eef3f6; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

::selection { background: var(--accent); color: #fff; }

/* ---------- 27. 响应式：平板 ---------- */
@media (max-width: 992px) {
  :root { --header-h: 64px; }
  .hero .container { grid-template-columns: 1fr; gap: 36px; padding: 64px 20px; }
  .hero h1 { font-size: 36px; }
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .product-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-cols { grid-template-columns: 1fr 1fr; gap: 30px; }
  .layout, .layout--list, .contact-grid { grid-template-columns: 1fr; }
  .sidebar, .filter-bar { position: static; }
  .case-grid { grid-template-columns: 1fr 1fr; }
}

/* ---------- 28. 响应式：手机 ---------- */
@media (max-width: 768px) {
  .section { padding: 52px 0; }
  .section-head h2 { font-size: 26px; }
  .topbar-left { gap: 14px; font-size: 12px; }
  .topbar-right { display: none; }

  /* 移动端导航 */
  .nav-toggle { display: block; }
  .main-nav {
    position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0;
    background: #fff; transform: translateX(100%); transition: transform var(--transition);
    overflow-y: auto; z-index: 999; padding: 10px 0;
  }
  .main-nav.open { transform: translateX(0); }
  .main-nav > ul { flex-direction: column; align-items: stretch; gap: 0; }
  .main-nav > ul > li { border-bottom: 1px solid var(--border); }
  .main-nav > ul > li > a { padding: 14px 20px; border-radius: 0; }
  .main-nav > ul > li > a::after { display: none; }
  .sub-nav { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: 0; border-top: 1px dashed var(--border); background: var(--bg-alt); padding: 0; }
  .sub-nav li a { padding: 10px 36px; }
  .sub-nav li a:hover { padding-left: 42px; }

  .hero h1 { font-size: 30px; }
  .hero-sub { font-size: 16px; }
  .hero-cards { grid-template-columns: 1fr 1fr; }

  .product-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  /* 产品列表页：手机端保持 2 列，隐藏长描述 */
  .product-grid--3 .product-body p { display: none; }
  .product-grid--3 .product-body { padding: 14px; }
  .product-grid--3 .product-body h3 { font-size: 15px; }

  /* 产品分类侧栏：手机端折叠，点击标题展开 */
  .filter-bar { padding: 14px 18px; }
  .filter-bar h4 {
    cursor: pointer; margin-bottom: 0; padding-bottom: 0; border-bottom: 0;
    display: flex; justify-content: space-between; align-items: center;
  }
  .filter-bar h4::after {
    content: ""; width: 8px; height: 8px; margin-right: 4px;
    border-right: 2px solid var(--primary); border-bottom: 2px solid var(--primary);
    transform: rotate(45deg); transition: transform var(--transition);
  }
  .filter-bar.open h4::after { transform: rotate(225deg); margin-top: 6px; }
  .filter-list { display: none; margin-top: 12px; padding-top: 8px; border-top: 1px solid var(--border); }
  .filter-bar.open .filter-list { display: block; }
  .feature-list { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .news-item { flex-direction: column; }
  .news-thumb { width: 100%; height: 160px; }
  .honor-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .case-grid { grid-template-columns: 1fr; }
  .list-grid { grid-template-columns: 1fr; }
  .list-card { flex-direction: column; }
  .list-thumb { width: 100%; height: 180px; }
  .footer-cols { grid-template-columns: 1fr; gap: 28px; }
  .pre-next { grid-template-columns: 1fr; }
  .form-row.half { grid-template-columns: 1fr; }
  .search-form { flex-direction: column; }
  .cta-phone { font-size: 28px; }
}

@media (max-width: 480px) {
  .product-grid { grid-template-columns: 1fr; }
  /* 产品列表页在窄屏仍保持 2 列 */
  .product-grid--3 { grid-template-columns: repeat(2, 1fr); }
  .hero-cards { grid-template-columns: 1fr; }
  .container { padding: 0 16px; }
  .article, .single-content, .contact-form { padding: 22px; }
}

/* ---------- 29. 打印样式 ---------- */
@media print {
  .topbar, .site-header, .back-top, .cta-band, .site-footer, .sidebar, .pre-next, .pagination { display: none !important; }
  body { font-size: 12px; color: #000; }
  .article, .single-content { border: 0; padding: 0; }
  a { color: #000; text-decoration: underline; }
}