/* ==========================================================================
   三奥电气有限公司 · 纯静态官网
   1. 设计令牌
   2. 基础 / 排版
   3. 通用组件（按钮/容器/sec-head/卡片/徽章）
   4. 头部导航（含下拉、移动端抽屉）
   5. 首页 Hero 轮播
   6. 首页各分区（about 四宫格 / 产品网格 / 新闻 / 优势 / CTA）
   7. 内页 Page-Hero + 面包屑
   8. 关于 / 文化 / 服务页样式
   9. 产品中心页（目录 + 系列区）
   10. 新闻页
   11. 人力资源页
   12. 联系我们页
   13. 页脚
   14. 滚动入场动画（渐进增强）
   15. 响应式
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  /* 色板：主色为电力行业藏青蓝 */
  --clr-primary: #0b3d91;
  --clr-primary-600: #0a3480;
  --clr-primary-700: #08295f;
  --clr-primary-050: #eef3fb;
  --clr-primary-100: #dde8f7;
  --clr-blue: #1a63c7;
  --clr-accent: #f5a81f;
  --clr-accent-600: #e09212;
  --clr-text: #1f2a3a;
  --clr-muted: #5b6b7e;
  --clr-bg: #f4f6fa;
  --clr-surface: #ffffff;
  --clr-border: #e2e8f0;
  --clr-dark: #0b2545;
  --clr-dark-2: #123356;
  --clr-success: #178a4b;
  --clr-danger: #c0392b;

  /* 间距刻度 4/8/12/16/24/32/48/64/96 */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 48px;
  --sp-8: 64px;
  --sp-9: 96px;

  /* 圆角 / 阴影 */
  --rd-sm: 6px;
  --rd-md: 10px;
  --rd-lg: 16px;
  --sh-1: 0 2px 10px rgba(15, 35, 70, 0.07);
  --sh-2: 0 12px 30px rgba(15, 35, 70, 0.12);

  /* 字体 */
  --font: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  --fs-xs: 13px;
  --fs-sm: 14px;
  --fs-base: 16px;
  --fs-md: 18px;
  --fs-lg: 22px;
  --fs-xl: 28px;
  --fs-2xl: 36px;

  /* 栅格断点（移动优先，仅 min-width） */
  --bp-sm: 640px;
  --bp-md: 768px;
  --bp-lg: 1024px;
  --bp-xl: 1280px;

  --container: 1120px;
}

/* ---------- 2. 基础 / 排版 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-base);
  line-height: 1.75;
  color: var(--clr-text);
  background: var(--clr-bg);
}
img { max-width: 100%; display: block; }
a { color: var(--clr-primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--clr-accent-600); }
h1, h2, h3, h4, h5 { margin: 0 0 .6em; line-height: 1.35; color: var(--clr-text); font-weight: 700; }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.3em; }
.container { width: min(100% - 40px, var(--container)); margin-inline: auto; }
section { scroll-margin-top: 90px; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--clr-accent); outline-offset: 2px; }

/* ---------- 3. 通用组件 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font: 600 15px/1 var(--font);
  padding: 13px 26px; border-radius: var(--rd-md);
  border: 1px solid transparent; cursor: pointer;
  transition: background .2s, color .2s, transform .15s, box-shadow .2s;
}
.btn svg { width: 17px; height: 17px; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: linear-gradient(135deg, var(--clr-primary), var(--clr-blue)); color: #fff; box-shadow: var(--sh-1); }
.btn-primary:hover { background: linear-gradient(135deg, var(--clr-primary-600), var(--clr-primary)); color: #fff; box-shadow: var(--sh-2); }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .65); }
.btn-ghost:hover { background: rgba(255, 255, 255, .12); color: #fff; border-color: #fff; }
.btn-accent { background: var(--clr-accent); color: #08295f; }
.btn-accent:hover { background: var(--clr-accent-600); color: #08295f; }
.btn-outline { background: #fff; color: var(--clr-primary); border-color: var(--clr-primary); }
.btn-outline:hover { background: var(--clr-primary); color: #fff; }

.sec { padding: var(--sp-8) 0; }
.sec.sec-alt { background: #fff; }
.sec-head { max-width: 760px; margin: 0 auto var(--sp-7); text-align: center; }
.sec-head .sec-kicker {
  display: inline-block; font-size: var(--fs-xs); letter-spacing: 3px;
  color: var(--clr-primary); background: var(--clr-primary-050);
  border: 1px solid var(--clr-primary-100); padding: 5px 14px; border-radius: 999px;
  text-transform: uppercase; margin-bottom: var(--sp-3);
}
.sec-head h2 { font-size: var(--fs-xl); }
.sec-head p { color: var(--clr-muted); margin: var(--sp-2) 0 0; }
.sec-kicker em { font-style: normal; text-transform: none; letter-spacing: 0; }

.card { background: var(--clr-surface); border: 1px solid var(--clr-border); border-radius: var(--rd-lg); box-shadow: var(--sh-1); overflow: hidden; transition: transform .25s, box-shadow .25s; }
.card:hover { transform: translateY(-4px); box-shadow: var(--sh-2); }

.badge { display: inline-block; font-size: 12px; line-height: 1; padding: 5px 10px; border-radius: 999px; background: var(--clr-primary-050); color: var(--clr-primary); border: 1px solid var(--clr-primary-100); }

/* 分区标题行（左右排） */
.sec-row { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--sp-4); margin-bottom: var(--sp-6); }
.sec-row .sec-head { margin: 0; text-align: left; }
.sec-more { white-space: nowrap; font-weight: 600; font-size: var(--fs-sm); display: inline-flex; align-items: center; gap: 6px; }
.sec-more svg { width: 15px; height: 15px; }

/* ---------- 4. 头部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--clr-border);
}
.site-header.is-scrolled { box-shadow: 0 4px 18px rgba(11, 61, 145, .10); }
.header-in { display: flex; align-items: center; gap: var(--sp-5); min-height: 76px; }
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-logo { width: 44px; height: 44px; flex-shrink: 0; }
.brand-name { font-weight: 800; font-size: 21px; color: var(--clr-primary-700); letter-spacing: 1px; line-height: 1.1; }
.brand-sub { display: block; font-size: 10px; font-weight: 600; letter-spacing: 2.5px; color: var(--clr-muted); text-transform: uppercase; margin-top: 2px; }
.site-nav { margin-left: auto; }
.site-nav > ul { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.site-nav > ul > li { position: relative; }
.site-nav a { display: block; }
.site-nav > ul > li > a {
  padding: 10px 15px; font-size: 15px; font-weight: 600; color: var(--clr-text); border-radius: var(--rd-sm);
}
.site-nav > ul > li > a:hover,
.site-nav > ul > li.is-active > a { color: var(--clr-primary); background: var(--clr-primary-050); }
.site-nav .has-sub > a::after {
  content: ""; display: inline-block; width: 6px; height: 6px; margin-left: 6px;
  border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-2px); vertical-align: middle;
}
.site-nav .sub {
  position: absolute; left: 0; top: calc(100% + 10px); min-width: 200px;
  background: #fff; border: 1px solid var(--clr-border); border-radius: var(--rd-md);
  box-shadow: var(--sh-2); list-style: none; margin: 0; padding: 8px;
  opacity: 0; visibility: hidden; transform: translateY(6px);
  transition: opacity .18s, transform .18s, visibility .18s; z-index: 90;
}
.site-nav .sub.sub-wide { min-width: 620px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; padding: 12px; }
.site-nav .sub.sub-links { min-width: 150px; }
.site-nav .has-sub:hover > .sub, .site-nav .has-sub:focus-within > .sub { opacity: 1; visibility: visible; transform: translateY(0); }
.site-nav .sub a { padding: 8px 12px; font-size: 14px; color: var(--clr-muted); border-radius: var(--rd-sm); }
.site-nav .sub a:hover { color: var(--clr-primary); background: var(--clr-primary-050); }
.header-tel { display: flex; align-items: center; gap: 10px; flex-shrink: 0; font-style: normal; margin-left: var(--sp-3); }
.header-tel svg { width: 36px; height: 36px; color: var(--clr-accent); }
.header-tel b { display: block; font-size: 18px; letter-spacing: .5px; color: var(--clr-primary-700); line-height: 1.15; }
.header-tel span { font-size: 11px; color: var(--clr-muted); }
.nav-toggle { display: none; margin-left: auto; background: none; border: 0; cursor: pointer; padding: 8px; color: var(--clr-primary-700); }
.nav-toggle svg { width: 26px; height: 26px; display: block; }

/* 移动端抽屉（.js 类启用后可开合） */
html.js .site-nav { display: none; }
html.js .site-header.nav-open .site-nav { display: block; }
@media (min-width: 1024px) {
  html.js .site-nav { display: block; }
}

/* ---------- 5. 首页 Hero 轮播 ---------- */
.hero-slider { position: relative; overflow: hidden; background: var(--clr-primary-700); color: #fff; }
.slide {
  position: relative; min-height: clamp(420px, 60vh, 560px);
  display: none; align-items: center;
  background: linear-gradient(118deg, var(--clr-primary-700) 0%, var(--clr-primary) 58%, #14509f 100%);
  color: #fff;
}
.slide.is-active { display: flex; animation: slideIn .6s ease both; }
@keyframes slideIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.slide::before, .slide::after { content: ""; position: absolute; border-radius: 50%; pointer-events: none; }
.slide::before { width: 520px; height: 520px; right: -140px; top: 50%; transform: translateY(-50%); background: radial-gradient(circle, rgba(255, 255, 255, .14), transparent 65%); }
.slide::after { width: 300px; height: 300px; right: 300px; bottom: -120px; border: 1px solid rgba(255, 255, 255, .18); }
.slide.slide-2 { background: linear-gradient(120deg, #0a2f68 0%, var(--clr-primary-600) 55%, #10509f 100%); }
.slide.slide-3 { background: linear-gradient(120deg, #08295f 0%, var(--clr-primary) 50%, #1a63c7 100%); }
.slide-inner { position: relative; z-index: 2; padding: var(--sp-8) 0; max-width: 640px; }
.slide-tag { display: inline-block; font-size: 13px; letter-spacing: 2px; border: 1px solid rgba(255, 255, 255, .4); padding: 4px 14px; border-radius: 999px; margin-bottom: var(--sp-4); }
.slide h1 { color: #fff; font-size: clamp(26px, 4vw, 42px); margin-bottom: var(--sp-4); }
.slide h1 strong { color: var(--clr-accent); }
.slide p { color: rgba(255, 255, 255, .85); font-size: var(--fs-md); margin-bottom: var(--sp-6); }
.slide-actions { display: flex; flex-wrap: wrap; gap: var(--sp-3); }
.hero-arrow {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 5;
  width: 46px; height: 46px; border-radius: 50%; border: 1px solid rgba(255, 255, 255, .35);
  background: rgba(255, 255, 255, .08); color: #fff; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}
.hero-arrow:hover { background: rgba(255, 255, 255, .2); }
.hero-arrow svg { width: 20px; height: 20px; }
.hero-arrow.prev { left: 18px; }
.hero-arrow.next { right: 18px; }
.hero-dots { position: absolute; left: 50%; bottom: 22px; transform: translateX(-50%); display: flex; gap: 8px; z-index: 6; }
.hero-dots button { width: 10px; height: 10px; border-radius: 999px; border: 0; padding: 0; background: rgba(255, 255, 255, .4); cursor: pointer; transition: width .2s, background .2s; }
.hero-dots button.is-active { width: 26px; background: var(--clr-accent); }

/* 首页快捷入口条 */
.quick-bar { position: relative; z-index: 8; }
.quick-bar .container { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-4); background: #fff; border-radius: var(--rd-lg); box-shadow: var(--sh-2); padding: var(--sp-5); margin-top: -34px; }
.quick-item { display: flex; align-items: center; gap: var(--sp-3); color: var(--clr-text); }
.quick-item:hover { color: var(--clr-primary); }
.quick-item svg { width: 40px; height: 40px; padding: 8px; border-radius: var(--rd-sm); background: var(--clr-primary-050); color: var(--clr-primary); flex-shrink: 0; }
.quick-item b { display: block; font-size: 15px; line-height: 1.4; }
.quick-item span { font-size: 12px; color: var(--clr-muted); }

/* ---------- 6. 首页分区 ---------- */
/* 关于 四宫格（还原原站 Floor002059） */
.about-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-5); }
.ab-card {
  position: relative; border-radius: var(--rd-lg); overflow: hidden; min-height: 210px;
  display: flex; flex-direction: column; justify-content: flex-end; padding: var(--sp-5);
  color: #fff; isolation: isolate;
}
.ab-card::before { content: ""; position: absolute; inset: 0; z-index: -1; opacity: .92; }
.ab-card h4 { color: #fff; font-size: var(--fs-md); margin-bottom: 4px; }
.ab-card p { color: rgba(255, 255, 255, .82); font-size: 13px; margin: 0; }
.ab-card .ab-icon { position: absolute; top: var(--sp-5); right: var(--sp-5); width: 54px; height: 54px; padding: 12px; border-radius: var(--rd-md); background: rgba(255, 255, 255, .16); }
.ab-card .ab-icon svg { width: 30px; height: 30px; }
.ab-1::before { background: linear-gradient(135deg, var(--clr-blue), var(--clr-primary-700)); }
.ab-2::before { background: linear-gradient(135deg, var(--clr-primary), #08295f); }
.ab-3::before { background: linear-gradient(135deg, #14509f, #0a2f68); }
.ab-4::before { background: linear-gradient(135deg, var(--clr-accent), #c9750a); }
.ab-card.ab-4 p { color: rgba(255, 255, 255, .9); }
a.ab-card:hover { color: #fff; }

/* 首页关于简介 */
.intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-7); align-items: center; }
.intro-media { position: relative; }
.intro-media .im-bg { border-radius: var(--rd-lg); aspect-ratio: 4 / 3; background: linear-gradient(135deg, var(--clr-primary-100), var(--clr-primary-050)); display: flex; align-items: center; justify-content: center; color: var(--clr-primary); }
.intro-media .im-bg svg { width: 46%; max-width: 220px; height: auto; opacity: .9; }
.intro-media::after { content: ""; position: absolute; right: -14px; bottom: -14px; width: 55%; height: 55%; border: 2px dashed var(--clr-accent); border-radius: var(--rd-lg); z-index: -1; }
.intro-txt .sec-head { text-align: left; margin-bottom: var(--sp-4); }
.intro-points { display: grid; gap: var(--sp-3); margin-top: var(--sp-5); }
.intro-point { display: flex; gap: var(--sp-3); align-items: flex-start; }
.intro-point svg { width: 22px; height: 22px; flex-shrink: 0; color: var(--clr-accent-600); margin-top: 3px; }
.intro-point b { display: block; margin-bottom: 2px; }

/* 首页产品网格（还原原站 19 系列） */
.prod-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-5); }
.prod-card { position: relative; display: block; padding: var(--sp-5); border-radius: var(--rd-lg); background: #fff; border: 1px solid var(--clr-border); box-shadow: var(--sh-1); transition: transform .25s, box-shadow .25s, border-color .25s; }
.prod-card:hover { transform: translateY(-4px); box-shadow: var(--sh-2); border-color: var(--clr-primary-100); }
.prod-card .pc-ico { width: 50px; height: 50px; padding: 10px; margin-bottom: var(--sp-4); border-radius: var(--rd-sm); background: linear-gradient(135deg, var(--clr-primary-050), var(--clr-primary-100)); color: var(--clr-primary); }
.prod-card .pc-ico svg { width: 100%; height: 100%; }
.prod-card h3 { font-size: 16px; margin-bottom: 4px; }
.prod-card p { font-size: 13px; color: var(--clr-muted); margin: 0 0 var(--sp-3); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.prod-card .pc-more { font-size: 13px; font-weight: 600; color: var(--clr-primary); display: inline-flex; align-items: center; gap: 4px; }
.prod-card .pc-more svg { width: 13px; height: 13px; transition: transform .2s; }
.prod-card:hover .pc-more svg { transform: translateX(3px); }

/* 首页新闻 */
.news-home { display: grid; grid-template-columns: 1.1fr .9fr; gap: var(--sp-6); }
.news-feature { display: flex; gap: var(--sp-5); background: #fff; border: 1px solid var(--clr-border); border-radius: var(--rd-lg); box-shadow: var(--sh-1); overflow: hidden; transition: box-shadow .25s; }
.news-feature:hover { box-shadow: var(--sh-2); }
.news-feature .nf-pic { width: 210px; flex-shrink: 0; background: linear-gradient(150deg, var(--clr-primary-050), var(--clr-primary-100)); display: flex; align-items: center; justify-content: center; color: var(--clr-primary); }
.news-feature .nf-pic svg { width: 60px; height: 60px; }
.news-feature .nf-body { padding: var(--sp-5); }
.news-feature time, .news-item time, .news-row time { font-size: 12px; color: var(--clr-muted); }
.news-feature h3 { font-size: 17px; line-height: 1.5; margin: 6px 0 8px; }
.news-feature p { font-size: 13.5px; color: var(--clr-muted); margin: 0; }
.news-list-h { display: grid; gap: var(--sp-3); }
.news-row { background: #fff; border: 1px solid var(--clr-border); border-radius: var(--rd-md); padding: var(--sp-3) var(--sp-4); display: flex; align-items: center; gap: var(--sp-4); transition: border-color .2s; }
.news-row:hover { border-color: var(--clr-primary-100); }
.news-row a { flex: 1; color: var(--clr-text); font-size: 14.5px; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
.news-row a:hover { color: var(--clr-primary); }

/* 首页优势 / 数据带 */
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-5); }
.why-card { text-align: center; padding: var(--sp-6) var(--sp-5); }
.why-card svg { width: 52px; height: 52px; padding: 11px; border-radius: var(--rd-md); color: #fff; margin: 0 auto var(--sp-4); background: linear-gradient(135deg, var(--clr-blue), var(--clr-primary-700)); }
.why-card h3 { font-size: 16px; }
.why-card p { font-size: 13.5px; color: var(--clr-muted); margin: 0; }
.stat-band { background: linear-gradient(115deg, var(--clr-primary-700), var(--clr-blue)); color: #fff; padding: var(--sp-7) 0; }
.stat-band .container { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-6); text-align: center; }
.stat-item b { display: block; font-size: clamp(24px, 3vw, 34px); color: var(--clr-accent); }
.stat-item span { font-size: 14px; color: rgba(255, 255, 255, .8); }

/* CTA 横幅 */
.cta-band { background: linear-gradient(115deg, var(--clr-primary-700), var(--clr-blue)); color: #fff; padding: var(--sp-7) 0; }
.cta-band .container { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-6); flex-wrap: wrap; }
.cta-band h2 { color: #fff; margin: 0 0 6px; font-size: var(--fs-lg); }
.cta-band p { color: rgba(255, 255, 255, .82); margin: 0; }
.cta-actions { display: flex; gap: var(--sp-3); flex-wrap: wrap; }

/* ---------- 7. 内页 Page-Hero ---------- */
.page-hero { background: linear-gradient(115deg, var(--clr-primary-700), var(--clr-blue)); color: #fff; padding: clamp(44px, 7vw, 84px) 0 var(--sp-7); position: relative; overflow: hidden; }
.page-hero::after { content: ""; position: absolute; right: -120px; top: -160px; width: 480px; height: 480px; border-radius: 50%; background: radial-gradient(circle, rgba(255, 255, 255, .12), transparent 65%); }
.page-hero h1 { color: #fff; font-size: clamp(24px, 3.4vw, 34px); position: relative; }
.page-hero p { color: rgba(255, 255, 255, .8); margin: var(--sp-2) 0 0; position: relative; max-width: 720px; }
.breadcrumb { margin-top: var(--sp-3); position: relative; font-size: 13px; color: rgba(255, 255, 255, .65); }
.breadcrumb a { color: rgba(255, 255, 255, .85); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb i { font-style: normal; margin: 0 6px; color: rgba(255, 255, 255, .5); }

/* ---------- 8. 关于 / 文化 / 服务 ---------- */
.rich { max-width: 860px; }
.rich h2 { font-size: var(--fs-lg); margin-top: var(--sp-6); }
.rich h3 { font-size: var(--fs-md); }
.rich p { color: #39465a; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-5); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-5); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-5); }
.tile { background: #fff; border: 1px solid var(--clr-border); border-radius: var(--rd-lg); padding: var(--sp-5); box-shadow: var(--sh-1); }
.tile svg.ic { width: 46px; height: 46px; padding: 9px; border-radius: var(--rd-sm); background: linear-gradient(135deg, var(--clr-primary-050), var(--clr-primary-100)); color: var(--clr-primary); margin-bottom: var(--sp-4); }
.tile h3 { font-size: 17px; }
.tile p { font-size: 14px; color: var(--clr-muted); margin: 0; }

/* 关于：图文段落 */
.about-story { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-7); align-items: center; margin-bottom: var(--sp-8); }
.about-story + .about-story .story-media { order: 2; }
.story-media .sm-box { aspect-ratio: 4 / 3; border-radius: var(--rd-lg); background: linear-gradient(135deg, var(--clr-primary-100), #eaf0fb 60%, #f7e7c9); display: flex; align-items: center; justify-content: center; color: var(--clr-primary); }
.story-media .sm-box svg { width: 55%; height: auto; }

/* 文化价值观卡（大） */
.value-card { text-align: center; padding: var(--sp-6) var(--sp-5); }
.value-card .vc-num { font-size: 13px; font-weight: 700; color: var(--clr-accent-600); letter-spacing: 2px; }
.value-card svg { width: 54px; height: 54px; padding: 11px; margin: var(--sp-3) auto; border-radius: var(--rd-md); color: var(--clr-primary); background: var(--clr-primary-050); }
.value-card h3 { font-size: 17px; }
.value-card p { font-size: 13.5px; color: var(--clr-muted); }

/* 服务流程 step */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-5); counter-reset: st; }
.step { position: relative; background: #fff; border: 1px solid var(--clr-border); border-radius: var(--rd-lg); padding: var(--sp-5); box-shadow: var(--sh-1); }
.step::before { counter-increment: st; content: "0" counter(st); position: absolute; top: var(--sp-4); right: var(--sp-4); font-size: 34px; font-weight: 800; color: var(--clr-primary-100); }
.step svg { width: 42px; height: 42px; padding: 8px; border-radius: var(--rd-sm); color: var(--clr-accent-600); background: #fdf3e0; margin-bottom: var(--sp-4); }
.step h3 { font-size: 16px; }
.step p { font-size: 13.5px; color: var(--clr-muted); margin: 0; }

/* ---------- 9. 产品中心页 ---------- */
.prod-layout { display: grid; grid-template-columns: 250px 1fr; gap: var(--sp-6); align-items: start; }
.dir-box { position: sticky; top: 96px; background: #fff; border: 1px solid var(--clr-border); border-radius: var(--rd-lg); box-shadow: var(--sh-1); padding: var(--sp-4); max-height: calc(100vh - 120px); overflow: auto; }
.dir-box h3 { font-size: 15px; padding: 4px 8px var(--sp-3); margin: 0; border-bottom: 1px solid var(--clr-border); }
.dir-box ol { list-style: none; margin: var(--sp-2) 0 0; padding: 0; }
.dir-box li a { display: block; padding: 6px 8px; font-size: 13.5px; color: var(--clr-muted); border-radius: var(--rd-sm); }
.dir-box li a:hover { color: var(--clr-primary); background: var(--clr-primary-050); }
.prod-sec { background: #fff; border: 1px solid var(--clr-border); border-radius: var(--rd-lg); box-shadow: var(--sh-1); padding: var(--sp-5); margin-bottom: var(--sp-5); scroll-margin-top: 96px; }
.prod-sec h2 { font-size: 19px; display: flex; align-items: center; gap: 10px; }
.prod-sec h2 .ps-no { width: 30px; height: 30px; flex-shrink: 0; border-radius: 8px; background: linear-gradient(135deg, var(--clr-primary), var(--clr-blue)); color: #fff; font-size: 14px; display: inline-flex; align-items: center; justify-content: center; }
.prod-sec .ps-lead { color: var(--clr-muted); font-size: 14px; margin: var(--sp-2) 0 var(--sp-4); }
.ps-items { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4); }
.ps-item { border: 1px solid var(--clr-border); border-radius: var(--rd-md); padding: var(--sp-4); background: var(--clr-bg); transition: border-color .2s; }
.ps-item:hover { border-color: var(--clr-primary-100); }
.ps-item h4 { font-size: 14.5px; margin-bottom: 4px; }
.ps-item p { font-size: 13px; color: var(--clr-muted); margin: 0; }
.ps-item .ps-tag { display: inline-block; margin-bottom: var(--sp-2); }

/* ---------- 10. 新闻页 ---------- */
.filter-bar { display: flex; gap: var(--sp-2); flex-wrap: wrap; margin-bottom: var(--sp-5); }
.filter-bar button { border: 1px solid var(--clr-border); background: #fff; color: var(--clr-muted); font: 600 14px/1 var(--font); padding: 9px 18px; border-radius: 999px; cursor: pointer; transition: all .2s; }
.filter-bar button.is-active { background: var(--clr-primary); color: #fff; border-color: var(--clr-primary); }
.news-list { display: grid; gap: var(--sp-5); }
.news-list .news-card { display: grid; grid-template-columns: 96px 1fr; gap: var(--sp-4); align-items: start; }
.news-date { text-align: center; background: var(--clr-primary-050); border-radius: var(--rd-md); padding: var(--sp-3) var(--sp-2); }
.news-date b { display: block; font-size: 22px; color: var(--clr-primary); line-height: 1.2; }
.news-date span { font-size: 11px; color: var(--clr-muted); }
.news-card h3 { font-size: 17px; line-height: 1.5; margin: 0 0 4px; }
.news-card h3 a { color: var(--clr-text); }
.news-card h3 a:hover { color: var(--clr-primary); }
.news-card .nc-sum { font-size: 13.5px; color: var(--clr-muted); margin: 0 0 var(--sp-2); }
.news-card details { margin-top: 4px; }
.news-card details summary { cursor: pointer; font-size: 13px; font-weight: 600; color: var(--clr-primary); list-style: none; display: inline-flex; align-items: center; gap: 5px; }
.news-card details summary::-webkit-details-marker { display: none; }
.news-card details summary::after { content: ""; width: 6px; height: 6px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: rotate(45deg); transition: transform .2s; }
.news-card details[open] summary::after { transform: rotate(-135deg); }
.news-card details .nd-body { background: var(--clr-bg); border-radius: var(--rd-sm); padding: var(--sp-4); margin-top: var(--sp-3); font-size: 14px; color: #39465a; }
.news-empty { text-align: center; color: var(--clr-muted); padding: var(--sp-8) 0; }

/* ---------- 11. 人力资源 ---------- */
.job-list { display: grid; gap: var(--sp-4); }
.job-item { background: #fff; border: 1px solid var(--clr-border); border-radius: var(--rd-md); padding: var(--sp-5); box-shadow: var(--sh-1); }
.job-item details summary { cursor: pointer; list-style: none; }
.job-item details summary::-webkit-details-marker { display: none; }
.job-item details summary::-webkit-details-marker { display: none; }
.job-item .job-head { display: flex; align-items: center; gap: var(--sp-4); flex-wrap: wrap; }
.job-item .job-head b { font-size: 17px; }
.job-item .job-head .job-meta { display: flex; gap: var(--sp-4); margin-left: auto; font-size: 13px; color: var(--clr-muted); }
.job-item .job-head svg.arrow { width: 20px; height: 20px; margin-left: auto; color: var(--clr-primary); transition: transform .2s; }
.job-item details[open] .job-head svg.arrow { transform: rotate(180deg); }
.job-body { margin-top: var(--sp-4); padding-top: var(--sp-4); border-top: 1px dashed var(--clr-border); font-size: 14px; color: #39465a; }
.job-body h4 { font-size: 14px; margin: 0 0 4px; }

/* ---------- 12. 联系我们 ---------- */
.contact-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-5); }
.ct-card { text-align: center; padding: var(--sp-6) var(--sp-4); }
.ct-card svg { width: 54px; height: 54px; padding: 11px; margin: 0 auto var(--sp-3); border-radius: var(--rd-md); color: var(--clr-primary); background: var(--clr-primary-050); display: block; }
.ct-card h3 { font-size: 15px; margin-bottom: 2px; }
.ct-card p { color: var(--clr-muted); font-size: 13.5px; margin: 0; }
.ct-card a { color: var(--clr-text); }
.contact-split { display: grid; grid-template-columns: 1fr 1.2fr; gap: var(--sp-6); align-items: start; }
.contact-form { background: #fff; border: 1px solid var(--clr-border); border-radius: var(--rd-lg); box-shadow: var(--sh-1); padding: var(--sp-6); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-4); }
.form-group { margin-bottom: var(--sp-4); }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 11px 13px; border: 1px solid var(--clr-border); border-radius: var(--rd-sm);
  font: 14px/1.5 var(--font); color: var(--clr-text); background: #fff;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { border-color: var(--clr-primary); outline: none; box-shadow: 0 0 0 3px rgba(11, 61, 145, .1); }
.form-group textarea { min-height: 130px; resize: vertical; }
.form-tip { font-size: 12px; color: var(--clr-muted); }
.form-ok { margin-top: var(--sp-3); padding: var(--sp-3) var(--sp-4); border-radius: var(--rd-sm); background: #e7f5ec; color: var(--clr-success); font-size: 14px; display: none; }
.form-ok.show { display: block; }
.contact-aside { display: grid; gap: var(--sp-5); }
.qr-box { text-align: center; padding: var(--sp-5); }
.qr-box .qr { width: 150px; height: 150px; margin: 0 auto var(--sp-3); border-radius: var(--rd-md); border: 1px dashed var(--clr-border); background: #f8fafc; display: flex; align-items: center; justify-content: center; color: var(--clr-muted); }
.qr-box .qr svg { width: 64px; height: 64px; opacity: .5; }
.qr-box p { font-size: 13px; color: var(--clr-muted); margin: 0; }
.map-placeholder { border-radius: var(--rd-lg); border: 1px dashed var(--clr-border); background: #fff; padding: var(--sp-6); display: flex; gap: var(--sp-4); align-items: center; justify-content: center; color: var(--clr-muted); font-size: 14px; text-align: center; }
.map-placeholder svg { width: 34px; height: 34px; flex-shrink: 0; }

/* ---------- 13. 页脚 ---------- */
.site-footer { background: var(--clr-dark); color: rgba(255, 255, 255, .72); }
.footer-main { padding: var(--sp-8) 0 var(--sp-6); display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr 1.3fr; gap: var(--sp-6); }
.footer-main h3 { color: #fff; font-size: 15px; margin-bottom: var(--sp-4); letter-spacing: 1px; }
.footer-main ul { list-style: none; margin: 0; padding: 0; }
.footer-main li { margin-bottom: 8px; }
.footer-main li a { color: rgba(255, 255, 255, .66); font-size: 13.5px; }
.footer-main li a:hover { color: var(--clr-accent); }
.f-brand .brand-name { color: #fff; }
.f-brand .brand-sub { color: rgba(255, 255, 255, .5); }
.f-brand p { font-size: 13.5px; margin: var(--sp-3) 0 0; }
.f-contact p { margin: 0 0 8px; font-size: 13.5px; }
.f-contact .fc { display: flex; gap: 8px; align-items: flex-start; }
.f-contact svg { width: 16px; height: 16px; flex-shrink: 0; margin-top: 3px; color: var(--clr-accent); }
.f-contact a { color: rgba(255, 255, 255, .66); }
.f-contact a:hover { color: var(--clr-accent); }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .1); padding: var(--sp-4) 0; }
.footer-bottom .container { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-3); flex-wrap: wrap; font-size: 13px; }
.footer-bottom a { color: rgba(255, 255, 255, .66); }
.footer-bottom a:hover { color: var(--clr-accent); }
.f-icp { display: flex; gap: var(--sp-4); flex-wrap: wrap; }

/* 回到顶部 */
.to-top { position: fixed; right: 22px; bottom: 22px; z-index: 60; width: 44px; height: 44px; border-radius: 50%; border: 0; background: var(--clr-primary); color: #fff; cursor: pointer; display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transition: opacity .25s, visibility .25s; box-shadow: var(--sh-2); }
.to-top.show { opacity: 1; visibility: visible; }
.to-top svg { width: 18px; height: 18px; }

/* ---------- 14. 滚动入场动画（渐进增强） ---------- */
html.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
html.js .reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html.js .reveal { opacity: 1; transform: none; transition: none; }
  .slide.is-active { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; }
  .site-header .header-tel { display: none; }
  html.js .site-nav {
    position: fixed; top: 76px; left: 0; right: 0; bottom: auto; background: #fff; border-top: 1px solid var(--clr-border);
    box-shadow: var(--sh-2); padding: 16px; max-height: calc(100vh - 76px); overflow: auto;
  }
  html.js .site-nav > ul { display: grid; gap: 4px; }
  html.js .site-nav .has-sub > a::after { float: right; margin-top: 6px; }
  html.js .site-nav .sub { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: 0; display: none; padding: 0 0 0 12px; }
  html.js .site-nav .has-sub.open .sub { display: grid; }
  html.js .site-nav .sub.sub-wide { grid-template-columns: 1fr; min-width: 0; }
  .quick-bar .container { grid-template-columns: repeat(2, 1fr); }
  .about-cards { grid-template-columns: repeat(2, 1fr); }
  .prod-grid { grid-template-columns: repeat(3, 1fr); }
  .news-home { grid-template-columns: 1fr; }
  .why-grid, .grid-4, .contact-cards, .stat-band .container { grid-template-columns: repeat(2, 1fr); }
  .intro-grid, .about-story, .contact-split { grid-template-columns: 1fr; }
  .about-story + .about-story .story-media { order: 0; }
  .grid-3, .steps { grid-template-columns: repeat(2, 1fr); }
  .prod-layout { grid-template-columns: 1fr; }
  .dir-box { position: static; max-height: 320px; }
  .footer-main { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 640px) and (max-width: 1023px) { .footer-main { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 639px) {
  .container { width: calc(100% - 28px); }
  .sec { padding: var(--sp-7) 0; }
  .grid-2, .grid-3, .grid-4, .prod-grid, .steps, .ps-items, .about-cards { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .news-feature { flex-direction: column; }
  .news-feature .nf-pic { width: 100%; padding: var(--sp-6) 0; }
  .quick-bar .container { grid-template-columns: 1fr 1fr; gap: var(--sp-3); padding: var(--sp-4); }
  .slide { min-height: 460px; }
  .hero-arrow.prev { left: 8px; }
  .hero-arrow.next { right: 8px; }
  .ps-items { grid-template-columns: 1fr 1fr; }
  .footer-main { grid-template-columns: 1fr; }
  .footer-bottom .container { justify-content: center; text-align: center; }
}

/* ==========================================================================
   16. 独立收录页扩展（产品详情 / 新闻详情 / 工程案例）
   移动优先，min-width 断点
   ========================================================================== */

/* ---------- 首页产品卡图文变体 ---------- */
.prod-card.pcard-img { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.prod-card.pcard-img .pc-thumb { display: block; aspect-ratio: 16 / 10; overflow: hidden; background: #fff; border-bottom: 1px solid var(--clr-border); }
.prod-card.pcard-img .pc-thumb img { width: 100%; height: 100%; object-fit: contain; padding: 10px; transition: transform .35s; }
.prod-card.pcard-img:hover .pc-thumb img { transform: scale(1.07); }
.prod-card.pcard-img .pc-ico { display: none; }
.prod-card.pcard-img h3 { padding: 16px 16px 0; margin: 0 0 4px; }
.prod-card.pcard-img p { padding: 0 16px; margin: 0 0 10px; }
.prod-card.pcard-img .pc-more { padding: 0 16px 16px; }
/* 首页新闻头条换真实图 */
.news-feature .nf-pic { overflow: hidden; padding: 0; align-items: stretch; background: var(--clr-primary-050); }
.news-feature .nf-pic img { width: 100%; height: 100%; min-height: 210px; object-fit: cover; }

/* ---------- 通用面板 / 正文 ---------- */
.panel { background: #fff; border: 1px solid var(--clr-border); border-radius: var(--rd-lg); box-shadow: var(--sh-1); padding: var(--sp-6); margin-bottom: var(--sp-5); }
.panel .panel-tit { display: flex; align-items: center; gap: 10px; font-size: 18px; margin: 0 0 var(--sp-4); padding-bottom: var(--sp-3); border-bottom: 1px solid var(--clr-border); }
.panel .panel-tit svg { width: 22px; height: 22px; color: var(--clr-primary); flex-shrink: 0; }
.art-body { font-size: 15px; line-height: 2; color: #39465a; }
.art-body p { margin: 0 0 1.1em; }
.art-body h3 { font-size: 17px; margin: 1.4em 0 .6em; color: var(--clr-primary-700); }
.art-body ul, .art-body ol { color: #39465a; }
.art-body img { border-radius: var(--rd-md); margin: 4px 0 var(--sp-4); }
.art-body table { width: 100%; border-collapse: collapse; margin: 0 0 var(--sp-4); font-size: 14px; }
.art-body th, .art-body td { border: 1px solid var(--clr-border); padding: 8px 10px; text-align: left; }
.art-body th { background: var(--clr-primary-050); color: var(--clr-primary-700); font-weight: 600; }
.note-box { display: flex; gap: var(--sp-3); background: #fff8ec; border: 1px solid #f6dfae; border-radius: var(--rd-md); padding: var(--sp-4) var(--sp-5); font-size: 14px; color: #7a5b16; line-height: 1.8; }
.note-box svg { width: 22px; height: 22px; flex-shrink: 0; color: var(--clr-accent-600); margin-top: 3px; }

/* ---------- 产品系列总览（product.html） ---------- */
.p-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-5); }
.p-card { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--clr-border); border-radius: var(--rd-lg); overflow: hidden; box-shadow: var(--sh-1); transition: transform .25s, box-shadow .25s, border-color .25s; }
.p-card:hover { transform: translateY(-4px); box-shadow: var(--sh-2); border-color: var(--clr-primary-100); }
.p-thumb { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: #fff; border-bottom: 1px solid var(--clr-border); display: flex; align-items: center; justify-content: center; }
.p-thumb img { width: 100%; height: 100%; object-fit: contain; padding: 14px; transition: transform .35s; }
.p-card:hover .p-thumb img { transform: scale(1.06); }
.p-body { display: flex; flex-direction: column; flex: 1; padding: 16px 18px 14px; }
.p-body .p-no { font-size: 11px; letter-spacing: 2px; color: var(--clr-accent-600); font-weight: 700; margin: 0 0 6px; }
.p-body h3 { font-size: 16px; margin: 0 0 6px; }
.p-body p { font-size: 13px; color: var(--clr-muted); margin: 0 0 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; line-height: 1.7; }
.p-more { margin-top: auto; font-size: 13px; font-weight: 600; color: var(--clr-primary); display: inline-flex; align-items: center; gap: 5px; }
.p-more svg { width: 14px; height: 14px; transition: transform .2s; }
.p-card:hover .p-more svg { transform: translateX(3px); }

/* ---------- 产品详情页（pd-*.html） ---------- */
.pd-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--sp-5); align-items: start; }
.pd-top { display: grid; grid-template-columns: 1fr; gap: var(--sp-6); }
.pd-shot { background: #fff; border: 1px solid var(--clr-border); border-radius: var(--rd-md); padding: var(--sp-5); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.pd-shot img { width: 100%; max-width: 320px; aspect-ratio: 1; object-fit: contain; }
.pd-info .pd-name-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 6px; }
.pd-info h1 { font-size: 24px; margin: 0; }
.pd-info .pd-lead { color: var(--clr-muted); font-size: 15px; margin: 0 0 var(--sp-4); line-height: 1.9; }
.pd-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: var(--sp-4); }
.pd-chips span { font-size: 12px; color: var(--clr-primary); background: var(--clr-primary-050); border: 1px solid var(--clr-primary-100); padding: 4px 12px; border-radius: 999px; }
.pd-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.mdl-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: var(--sp-4); }
.mdl-card { background: #fff; border: 1px solid var(--clr-border); border-radius: var(--rd-md); overflow: hidden; display: flex; flex-direction: column; transition: box-shadow .2s, border-color .2s; }
.mdl-card:hover { border-color: var(--clr-primary-100); box-shadow: var(--sh-1); }
.mdl-card .mdl-pic { aspect-ratio: 4 / 3; background: #fff; display: flex; align-items: center; justify-content: center; border-bottom: 1px solid var(--clr-border); overflow: hidden; }
.mdl-card .mdl-pic img { width: 100%; height: 100%; object-fit: contain; padding: 10px; }
.mdl-card h4 { font-size: 14px; margin: 0; padding: 12px 14px 4px; }
.mdl-card p { font-size: 12.5px; color: var(--clr-muted); margin: 0; padding: 0 14px 14px; }
.pd-aside { display: grid; gap: var(--sp-5); align-content: start; }
.pd-side { background: #fff; border: 1px solid var(--clr-border); border-radius: var(--rd-lg); box-shadow: var(--sh-1); padding: var(--sp-5); }
.pd-side h3 { font-size: 15px; margin: 0 0 var(--sp-3); padding-bottom: var(--sp-2); border-bottom: 1px solid var(--clr-border); }
.pd-side ul { list-style: none; margin: 0; padding: 0; }
.pd-side li a { display: block; padding: 7px 4px; font-size: 13.5px; color: var(--clr-muted); border-bottom: 1px dashed var(--clr-border); }
.pd-side li:last-child a { border-bottom: 0; }
.pd-side li a:hover { color: var(--clr-primary); }
.pd-side .tel-lg { font-size: 22px; font-weight: 800; color: var(--clr-accent-600); display: block; line-height: 1.3; }
.pd-nav { display: grid; grid-template-columns: 1fr auto 1fr; gap: var(--sp-4); align-items: center; }
.pd-nav a { font-size: 14px; font-weight: 600; }
.pd-nav .prev-x { text-align: left; }
.pd-nav .next-x { text-align: right; }
.pd-nav .to-list { color: var(--clr-muted); font-weight: 400; }

/* ---------- 新闻列表页（news.html）缩略卡 ---------- */
.news-item { display: grid; grid-template-columns: 1fr; background: #fff; border: 1px solid var(--clr-border); border-radius: var(--rd-lg); overflow: hidden; box-shadow: var(--sh-1); transition: transform .25s, box-shadow .25s, border-color .25s; }
.news-item:hover { transform: translateY(-3px); box-shadow: var(--sh-2); border-color: var(--clr-primary-100); }
.news-item .ni-pic { aspect-ratio: 16 / 9; overflow: hidden; background: var(--clr-primary-050); }
.news-item .ni-pic img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.news-item:hover .ni-pic img { transform: scale(1.05); }
.news-item .ni-body { padding: var(--sp-5); }
.news-item .ni-meta { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 6px; font-size: 12.5px; color: var(--clr-muted); }
.news-item h3 { font-size: 18px; margin: 0 0 8px; line-height: 1.5; }
.news-item h3 a { color: var(--clr-text); }
.news-item h3 a:hover { color: var(--clr-primary); }
.news-item .nc-sum { font-size: 13.5px; color: var(--clr-muted); margin: 0 0 12px; line-height: 1.8; }
.news-item .ni-more { font-size: 13px; font-weight: 600; color: var(--clr-primary); display: inline-flex; align-items: center; gap: 5px; }
.news-item .ni-more svg { width: 14px; height: 14px; }

/* ---------- 新闻详情页（news-art-*.html） ---------- */
.art-wrap { max-width: 880px; margin-inline: auto; }
.art-head { text-align: center; padding: var(--sp-6) 0 var(--sp-5); }
.art-head h1 { font-size: 26px; line-height: 1.5; margin: 0 0 var(--sp-3); }
.art-head .art-meta { display: inline-flex; align-items: center; gap: 14px; flex-wrap: wrap; justify-content: center; font-size: 13px; color: var(--clr-muted); }
.art-head .art-hero { margin: var(--sp-4) 0 0; border-radius: var(--rd-lg); overflow: hidden; }
.art-head .art-hero img { width: 100%; max-height: 380px; object-fit: cover; }
.art-foot { display: flex; justify-content: space-between; gap: var(--sp-4); border-top: 1px solid var(--clr-border); padding-top: var(--sp-4); margin-top: var(--sp-4); font-size: 13.5px; flex-wrap: wrap; }
.art-rel { margin-top: var(--sp-6); }
.art-rel h3 { font-size: 16px; margin-bottom: var(--sp-3); }
.art-rel ul { list-style: none; margin: 0; padding: 0; }
.art-rel li a { display: flex; justify-content: space-between; gap: var(--sp-4); padding: 10px 4px; border-bottom: 1px dashed var(--clr-border); font-size: 14px; color: var(--clr-text); }
.art-rel li a:hover { color: var(--clr-primary); }
.art-rel time { color: var(--clr-muted); font-size: 12.5px; flex-shrink: 0; }

/* ---------- 案例（case.html / case-*.html） ---------- */
.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-6); }
.case-card { background: #fff; border: 1px solid var(--clr-border); border-radius: var(--rd-lg); overflow: hidden; box-shadow: var(--sh-1); transition: transform .25s, box-shadow .25s; color: var(--clr-text); display: flex; flex-direction: column; }
.case-card:hover { transform: translateY(-4px); box-shadow: var(--sh-2); color: var(--clr-text); }
.case-card .cc-pic { aspect-ratio: 16 / 9; overflow: hidden; background: var(--clr-primary-050); }
.case-card .cc-pic img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.case-card:hover .cc-pic img { transform: scale(1.05); }
.case-card .cc-body { padding: var(--sp-5); display: flex; flex-direction: column; flex: 1; }
.case-card .cc-tag { font-size: 11px; letter-spacing: 2px; color: var(--clr-accent-600); font-weight: 700; }
.case-card h3 { font-size: 18px; margin: 6px 0 8px; }
.case-card p { font-size: 13.5px; color: var(--clr-muted); margin: 0 0 14px; line-height: 1.8; }
.case-card .cc-more { margin-top: auto; font-size: 13px; font-weight: 600; color: var(--clr-primary); display: inline-flex; align-items: center; gap: 5px; }
.case-card .cc-more svg { width: 14px; height: 14px; transition: transform .2s; }
.case-card:hover .cc-more svg { transform: translateX(3px); }
.case-detail-hero { border-radius: var(--rd-lg); overflow: hidden; margin-bottom: var(--sp-5); box-shadow: var(--sh-1); }
.case-detail-hero img { width: 100%; max-height: 420px; object-fit: cover; }
.case-facts { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-4); margin-bottom: var(--sp-4); }
.case-fact { background: var(--clr-primary-050); border-radius: var(--rd-md); padding: var(--sp-3) var(--sp-4); }
.case-fact b { display: block; font-size: 12px; color: var(--clr-muted); font-weight: 400; }
.case-fact span { font-size: 15px; font-weight: 600; color: var(--clr-primary-700); }

/* ---------- v2 响应式 ---------- */
@media (min-width: 640px) {
  .news-item { grid-template-columns: 260px 1fr; }
  .news-item .ni-pic { aspect-ratio: auto; }
}
@media (min-width: 768px) {
  .pd-top { grid-template-columns: 300px 1fr; }
  .pd-layout { grid-template-columns: minmax(0, 1fr) 300px; }
  .pd-aside { position: sticky; top: 96px; }
  .case-facts { grid-template-columns: repeat(4, 1fr); }
}
@media (min-width: 1024px) {
  .p-grid { grid-template-columns: repeat(3, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1200px) {
  .p-grid { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 1023px) {
  .case-grid { grid-template-columns: 1fr; }
  .p-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 767px) {
  .p-grid { grid-template-columns: repeat(2, 1fr); }
  .art-head h1 { font-size: 21px; }
  .panel { padding: var(--sp-5); }
}
@media (max-width: 479px) {
  .p-grid { grid-template-columns: 1fr; }
  .case-facts { grid-template-columns: repeat(2, 1fr); }
  .news-feature { flex-direction: column; }
  .news-feature .nf-pic img { min-height: 0; }
}

/* ---------- 站点地图列表 ---------- */
.sm-list { list-style: none; margin: 0; padding: 0; }
.sm-list li a { display: block; padding: 6px 2px; font-size: 13.5px; color: var(--clr-muted); border-bottom: 1px dashed var(--clr-border); line-height: 1.6; }
.sm-list li a:hover { color: var(--clr-primary); }
.sm-list li:last-child a { border-bottom: 0; }