@charset "utf-8";
/* ==========================================================================
   上清科技官网 · 设计系统
   视觉基线对齐同行站(霍尔德)：主色 #005bac 科技蓝 / 深藏青 #141b60 / 点缀金 #fbcc30
   白色固定头部 + 横向导航 + 全宽 Mega 菜单，1600px 容器
   ========================================================================== */

:root {
  --primary: #005bac;
  --primary-d: #00458a;
  --primary-l: #e8f1fa;
  --navy: #141b60;
  --navy-l: #1e2878;
  --accent: #fbcc30;
  --text: #1f2430;
  --text-2: #555c6b;
  --text-3: #8a93a6;
  --line: #e8ecf2;
  --bg: #ffffff;
  --bg-soft: #f5f7fb;
  --bg-dark: #10163f;
  --radius: 6px;
  --radius-lg: 10px;
  --shadow: 0 6px 24px rgba(20, 27, 96, 0.08);
  --shadow-hover: 0 14px 34px rgba(20, 27, 96, 0.16);
  --container: 1600px;
  --header-h: 90px;
  --font: "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, "PingFang SC", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  padding-top: var(--header-h);
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color .25s, background-color .25s; }
a:hover { color: var(--primary); }
img { max-width: 100%; border: 0; vertical-align: middle; }
ul, ol { list-style: none; }
input, textarea, select, button { font-family: inherit; font-size: inherit; outline: none; }
h1, h2, h3, h4, h5 { font-weight: 700; line-height: 1.35; color: var(--text); }
.clearfix::after { content: ""; display: table; clear: both; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 72px 0; }
.section--soft { background: var(--bg-soft); }
.section--dark { background: var(--navy); color: #fff; }
.section--dark h1, .section--dark h2, .section--dark h3 { color: #fff; }

/* ---------- 通用标题 ---------- */
.sec-head { text-align: center; margin-bottom: 44px; }
.sec-head .en {
  display: block; font-size: 14px; letter-spacing: 3px; color: var(--primary);
  text-transform: uppercase; font-weight: 600; margin-bottom: 8px; opacity: .8;
}
.sec-head h2 { font-size: 34px; letter-spacing: 1px; }
.sec-head p { color: var(--text-3); margin-top: 12px; font-size: 15px; }
.sec-head--left { text-align: left; }
.sec-head--light .en { color: var(--accent); }
.sec-head--light h2 { color: #fff; }
.sec-head--light p { color: rgba(255, 255, 255, .7); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 46px; padding: 0 30px; border-radius: var(--radius);
  background: var(--primary); color: #fff; font-size: 15px; font-weight: 600;
  border: 1px solid var(--primary); cursor: pointer; transition: all .25s; white-space: nowrap;
}
.btn:hover { background: var(--primary-d); border-color: var(--primary-d); color: #fff; transform: translateY(-2px); box-shadow: 0 10px 20px rgba(0, 91, 172, .25); }
.btn--ghost { background: transparent; border-color: rgba(255, 255, 255, .6); color: #fff; }
.btn--ghost:hover { background: #fff; color: var(--primary); border-color: #fff; }
.btn--outline { background: #fff; color: var(--primary); }
.btn--outline:hover { background: var(--primary); color: #fff; }
.btn--accent { background: var(--accent); border-color: var(--accent); color: #3a2c00; }
.btn--accent:hover { background: #f5c000; border-color: #f5c000; color: #3a2c00; }
.btn--sm { height: 38px; padding: 0 20px; font-size: 14px; }

/* ==========================================================================
   头部
   ========================================================================== */
.site-header { position: fixed; top: 0; left: 0; right: 0; height: var(--header-h); background: #fff; z-index: 9997; box-shadow: 0 1px 0 var(--line); transition: box-shadow .3s; }
.site-header.is-scrolled { box-shadow: var(--shadow); }
.topbar { display: none; }
.header-inner { display: flex; align-items: center; height: var(--header-h); gap: 28px; }

.logo { flex: 0 0 auto; display: flex; align-items: center; gap: 12px; white-space: nowrap; }
.logo img { height: 46px; width: 46px; flex: 0 0 46px; }
.logo .logo-text strong { display: block; font-size: 19px; color: var(--navy); letter-spacing: .3px; line-height: 1.25; white-space: nowrap; }
.logo .logo-text span { display: block; font-size: 10.5px; color: var(--text-3); letter-spacing: .4px; white-space: nowrap; }

/* 主导航 */
.main-nav { flex: 1 1 auto; display: flex; justify-content: flex-start; min-width: 0; }
.nav-list { display: flex; align-items: center; }
.nav-list > li { position: relative; flex: 0 0 auto; }
.nav-list > li > a { display: block; padding: 0 18px; height: var(--header-h); line-height: var(--header-h); font-size: 16px; font-weight: 600; color: var(--text); position: relative; white-space: nowrap; }
.nav-list > li > a::after { content: ""; position: absolute; left: 50%; bottom: 26px; width: 0; height: 3px; background: var(--primary); border-radius: 2px; transform: translateX(-50%); transition: width .3s; }
.nav-list > li:hover > a, .nav-list > li.active > a { color: var(--primary); }
.nav-list > li:hover > a::after, .nav-list > li.active > a::after { width: 26px; }

/* Mega 菜单 */
.mega { position: absolute; top: var(--header-h); left: 0; min-width: 320px; background: #fff; box-shadow: var(--shadow); border-top: 3px solid var(--primary); border-radius: 0 0 var(--radius) var(--radius); padding: 18px 8px; opacity: 0; visibility: hidden; transform: translateY(12px); transition: all .28s; z-index: 9999; }
.nav-list > li:hover .mega { opacity: 1; visibility: visible; transform: translateY(0); }
.mega a { display: block; padding: 9px 22px; font-size: 15px; color: var(--text-2); border-radius: 4px; }
.mega a:hover { background: var(--primary-l); color: var(--primary); }
.mega--wide { width: 980px; display: flex; flex-wrap: wrap; padding: 14px; }
.mega--wide .col { width: 25%; padding: 6px 10px; }
.mega--wide .col h4 { font-size: 15px; color: var(--navy); padding: 8px 10px; border-bottom: 1px solid var(--line); margin-bottom: 6px; }
.mega--wide .col h4 a { padding: 0; background: none !important; color: var(--navy); }
.mega--wide .col a { padding: 7px 10px; }

/* 右侧搜索 & 电话 */
.header-right { flex: 0 0 auto; display: flex; align-items: center; gap: 16px; }
.header-search { flex: 0 0 auto; display: flex; align-items: center; height: 42px; border: 1px solid var(--line); border-radius: 21px; overflow: hidden; background: var(--bg-soft); }
.header-search input { width: 168px; height: 100%; border: 0; background: transparent; padding: 0 16px; font-size: 14px; }
.header-search input::placeholder { color: var(--text-3); }
.header-search button { width: 46px; height: 100%; border: 0; background: transparent; cursor: pointer; color: var(--primary); font-size: 16px; }
.header-search button:hover { background: var(--primary-l); }
.header-tel { display: flex; align-items: center; gap: 10px; }
.header-tel .ico { width: 38px; height: 38px; border-radius: 50%; background: var(--primary-l); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 17px; }
.header-tel .txt small { display: block; font-size: 12px; color: var(--text-3); line-height: 1.2; }
.header-tel .txt b { font-size: 18px; color: var(--primary); letter-spacing: .5px; }

.nav-toggle { display: none; width: 44px; height: 44px; border: 0; background: transparent; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text); margin: 5px auto; transition: .3s; }

/* ==========================================================================
   Hero 轮播
   ========================================================================== */
.hero { position: relative; height: 620px; overflow: hidden; background: var(--navy); }
.hero-slides { position: absolute; inset: 0; }
.hero-slide { position: absolute; inset: 0; opacity: 0; transition: opacity .8s ease; background-size: cover; background-position: center; }
.hero-slide.active { opacity: 1; }
.hero-slide::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(10,16,56,.92) 0%, rgba(10,16,56,.72) 45%, rgba(10,16,56,.15) 100%); }
.hero-inner { position: relative; z-index: 3; height: 100%; display: flex; align-items: center; }
.hero-copy { max-width: 720px; color: #fff; }
.hero-copy .en { display: inline-block; font-size: 14px; letter-spacing: 4px; color: var(--accent); font-weight: 600; margin-bottom: 16px; }
.hero-copy h1 { font-size: 52px; line-height: 1.2; color: #fff; margin-bottom: 20px; letter-spacing: 1px; }
.hero-copy p { font-size: 18px; color: rgba(255, 255, 255, .82); margin-bottom: 34px; max-width: 620px; }
.hero-copy .hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-dots { position: absolute; left: 50%; bottom: 34px; transform: translateX(-50%); display: flex; gap: 12px; z-index: 4; }
.hero-dots button { width: 38px; height: 5px; border: 0; border-radius: 3px; background: rgba(255,255,255,.4); cursor: pointer; transition: .3s; }
.hero-dots button.active { background: var(--accent); width: 52px; }
.hero-arrow { position: absolute; top: 50%; transform: translateY(-50%); width: 54px; height: 54px; border: 1px solid rgba(255,255,255,.35); background: rgba(0,0,0,.15); color: #fff; border-radius: 50%; cursor: pointer; z-index: 4; font-size: 20px; transition: .3s; }
.hero-arrow:hover { background: var(--primary); border-color: var(--primary); }
.hero-arrow.prev { right: 104px; }
.hero-arrow.next { right: 34px; }

/* 快捷入口条 */
.quick-bar { background: var(--navy); position: relative; z-index: 5; }
.quick-bar .container { display: grid; grid-template-columns: repeat(4, 1fr); }
.quick-item { display: flex; align-items: center; gap: 16px; padding: 26px 20px; color: #fff; border-right: 1px solid rgba(255,255,255,.1); transition: background .3s; }
.quick-item:last-child { border-right: 0; }
.quick-item:hover { background: var(--navy-l); }
.quick-item .ico { width: 52px; height: 52px; flex: 0 0 52px; border-radius: 50%; background: rgba(255,255,255,.1); display: flex; align-items: center; justify-content: center; font-size: 24px; }
.quick-item h4 { font-size: 17px; color: #fff; margin-bottom: 3px; }
.quick-item p { font-size: 13px; color: rgba(255,255,255,.62); margin: 0; }

/* ==========================================================================
   产品卡片 / 网格
   ========================================================================== */
.grid { display: grid; gap: 26px; }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

.p-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; transition: all .32s; display: flex; flex-direction: column; }
.p-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: transparent; }
.p-card__img { position: relative; aspect-ratio: 1 / 1; background: #fff; display: flex; align-items: center; justify-content: center; padding: 16px; overflow: hidden; }
.p-card__img img { max-width: 100%; max-height: 100%; object-fit: contain; transition: transform .5s; }
.p-card:hover .p-card__img img { transform: scale(1.06); }
.p-card__badge { position: absolute; left: 12px; top: 12px; background: var(--accent); color: #4a3800; font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 3px; }
.p-card__body { padding: 18px 20px 22px; border-top: 1px solid var(--line); flex: 1; display: flex; flex-direction: column; }
.p-card__title { font-size: 16px; font-weight: 600; color: var(--text); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 46px; }
.p-card__title:hover { color: var(--primary); }
.p-card__meta { margin-top: 10px; font-size: 13px; color: var(--text-3); display: flex; align-items: center; justify-content: space-between; }
.p-card__cat { color: var(--primary); background: var(--primary-l); padding: 2px 10px; border-radius: 12px; font-size: 12px; }
.p-card__btn { margin-top: 14px; }

/* 产品分类导航（左侧栏 + 内容） */
.cat-layout { display: grid; grid-template-columns: 260px 1fr; gap: 34px; align-items: start; }
.cat-side { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; position: sticky; top: calc(var(--header-h) + 20px); }
.cat-side__head { background: var(--primary); color: #fff; padding: 18px 22px; font-size: 18px; font-weight: 700; }
.cat-side ul li { border-bottom: 1px solid var(--line); }
.cat-side ul li:last-child { border-bottom: 0; }
.cat-side ul li > a { display: flex; align-items: center; justify-content: space-between; padding: 14px 22px; font-size: 15px; color: var(--text-2); }
.cat-side ul li > a:hover, .cat-side ul li.active > a { background: var(--primary-l); color: var(--primary); font-weight: 600; }
.cat-side ul li .children { background: var(--bg-soft); }
.cat-side ul li .children a { padding-left: 40px; font-size: 14px; }
.cat-side .cnt { font-size: 12px; color: var(--text-3); }

/* 产品中心顶部横向分类 */
.cat-tabs { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 34px; }
.cat-tabs a { padding: 10px 22px; border: 1px solid var(--line); border-radius: 30px; font-size: 15px; color: var(--text-2); background: #fff; }
.cat-tabs a:hover { border-color: var(--primary); color: var(--primary); }
.cat-tabs a.active { background: var(--primary); color: #fff; border-color: var(--primary); font-weight: 600; }

/* ==========================================================================
   关于我们 / 数据
   ========================================================================== */
.about-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
.about-media { position: relative; }
.about-media img { width: 100%; border-radius: var(--radius-lg); display: block; }
.about-collage { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.about-collage a { display: flex; align-items: center; justify-content: center; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); aspect-ratio: 1/1; padding: 14px; box-shadow: var(--shadow); transition: .35s; }
.about-collage a:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); border-color: var(--primary); }
.about-collage img { width: 100%; height: auto; max-height: 100%; object-fit: contain; border-radius: 0; }
.about-media .badge { position: absolute; left: -18px; bottom: 28px; background: var(--primary); color: #fff; padding: 18px 26px; border-radius: var(--radius); box-shadow: var(--shadow-hover); }
.about-media .badge b { display: block; font-size: 30px; line-height: 1; }
.about-media .badge span { font-size: 13px; opacity: .85; }
.about-copy h2 { font-size: 32px; margin-bottom: 8px; }
.about-copy .en-sub { color: var(--primary); font-size: 14px; letter-spacing: 2px; font-weight: 600; margin-bottom: 20px; }
.about-copy p { color: var(--text-2); margin-bottom: 16px; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 34px; }
.stat { text-align: center; padding: 22px 10px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); transition: .3s; }
.stat:hover { border-color: var(--primary); box-shadow: var(--shadow); transform: translateY(-4px); }
.stat b { display: block; font-size: 34px; color: var(--primary); line-height: 1.1; font-weight: 800; }
.stat b i { font-size: 18px; font-style: normal; }
.stat span { font-size: 14px; color: var(--text-3); }

/* 企业文化卡片 */
.culture-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.culture { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius-lg); padding: 26px 22px; transition: .3s; }
.culture:hover { background: rgba(255,255,255,.12); transform: translateY(-4px); }
.culture h4 { font-size: 17px; color: var(--accent) !important; margin-bottom: 10px; }
.culture p { font-size: 14px; color: rgba(255,255,255,.72); margin: 0; }

/* ==========================================================================
   新闻 / 资讯
   ========================================================================== */
.news-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.news-col { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; display: flex; flex-direction: column; }
.news-col__head { display: flex; align-items: center; justify-content: space-between; padding: 18px 24px; border-bottom: 1px solid var(--line); }
.news-col__head h3 { font-size: 19px; border-left: 4px solid var(--primary); padding-left: 12px; }
.news-col__head a { font-size: 13px; color: var(--text-3); }
.news-col__head a:hover { color: var(--primary); }
.news-col__list { padding: 10px 24px 18px; flex: 1; }
.news-item { padding: 14px 0; border-bottom: 1px dashed var(--line); display: flex; gap: 12px; align-items: baseline; }
.news-item:last-child { border-bottom: 0; }
.news-item time { flex: 0 0 auto; color: var(--text-3); font-size: 13px; }
.news-item a { flex: 1; font-size: 15px; color: var(--text-2); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-item a:hover { color: var(--primary); }

/* 新闻列表页(左图右文) */
.art-list { display: grid; gap: 0; }
.art-row { display: grid; grid-template-columns: 220px 1fr; gap: 26px; padding: 26px 0; border-bottom: 1px solid var(--line); }
.art-row:hover h3 { color: var(--primary); }
.art-row__img { aspect-ratio: 4/3; border-radius: var(--radius); overflow: hidden; background: var(--bg-soft); display: flex; align-items: center; justify-content: center; }
.art-row__img img { width: 100%; height: 100%; object-fit: cover; }
.art-row__img .ph { color: var(--text-3); font-size: 26px; font-weight: 800; letter-spacing: 2px; }
.art-row h3 { font-size: 20px; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.art-row p { color: var(--text-2); font-size: 14.5px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 12px; }
.art-row time { font-size: 13px; color: var(--text-3); }

/* 分类切换 */
.chips { display: flex; gap: 12px; margin-bottom: 10px; flex-wrap: wrap; }
.chips a { padding: 8px 20px; border: 1px solid var(--line); border-radius: 30px; font-size: 14px; color: var(--text-2); }
.chips a.active, .chips a:hover { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer { background: var(--bg-dark); color: rgba(255,255,255,.68); padding-top: 60px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.1fr; gap: 40px; padding-bottom: 44px; }
.foot-col h4 { color: #fff; font-size: 17px; margin-bottom: 20px; position: relative; padding-bottom: 12px; }
.foot-col h4::after { content: ""; position: absolute; left: 0; bottom: 0; width: 30px; height: 3px; background: var(--primary); border-radius: 2px; }
.foot-col ul li { margin-bottom: 11px; font-size: 14px; }
.foot-col ul li a:hover { color: #fff; }
.foot-contact li { display: flex; gap: 10px; margin-bottom: 14px; font-size: 14px; line-height: 1.6; }
.foot-contact li .k { color: rgba(255,255,255,.45); flex: 0 0 62px; }
.foot-contact li b { color: var(--accent); font-size: 18px; }
.foot-qr { display: flex; gap: 18px; margin-top: 18px; }
.foot-qr .qr { text-align: center; }
.foot-qr .qr img { width: 96px; height: 96px; background: #fff; border-radius: 6px; padding: 5px; }
.foot-qr .qr span { display: block; font-size: 12px; margin-top: 6px; }
.foot-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 22px 0; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 13.5px; color: rgba(255,255,255,.5); }
.foot-bottom a:hover { color: #fff; }

/* 友情链接 */
.links-bar { background: #0b1030; padding: 18px 0; border-top: 1px solid rgba(255,255,255,.07); }
.links-bar .container { display: flex; flex-wrap: wrap; gap: 8px 22px; align-items: center; font-size: 13.5px; }
.links-bar strong { color: #fff; }
.links-bar a { color: rgba(255,255,255,.55); }
.links-bar a:hover { color: var(--accent); }

/* 右侧悬浮 */
.float-bar { position: fixed; right: 18px; bottom: 90px; z-index: 999; display: flex; flex-direction: column; gap: 10px; }
.float-bar a, .float-bar button { width: 54px; height: 54px; border-radius: 10px; background: #fff; box-shadow: var(--shadow); display: flex; flex-direction: column; align-items: center; justify-content: center; font-size: 11px; color: var(--text-2); border: 0; cursor: pointer; transition: .3s; }
.float-bar a:hover, .float-bar button:hover { background: var(--primary); color: #fff; }
.float-bar .ico { font-size: 19px; line-height: 1; }
.float-bar .qr-pop { position: absolute; right: 64px; bottom: 0; background: #fff; padding: 10px; border-radius: 8px; box-shadow: var(--shadow); display: none; }
.float-bar .qr-pop img { width: 120px; height: 120px; display: block; }
.float-bar .qr-wrap:hover .qr-pop { display: block; }

/* ==========================================================================
   内页通用
   ========================================================================== */
.page-banner { background: linear-gradient(120deg, var(--navy) 0%, var(--primary) 100%); color: #fff; padding: 62px 0 56px; position: relative; overflow: hidden; }
.page-banner::after { content: ""; position: absolute; right: -60px; top: -60px; width: 320px; height: 320px; border-radius: 50%; background: rgba(255,255,255,.06); }
.page-banner h1 { font-size: 38px; color: #fff; margin-bottom: 8px; }
.page-banner .en { font-size: 14px; letter-spacing: 3px; color: rgba(255,255,255,.7); text-transform: uppercase; }
.page-banner p { color: rgba(255,255,255,.75); margin-top: 10px; max-width: 760px; }

.crumbs { background: var(--bg-soft); border-bottom: 1px solid var(--line); }
.crumbs .container { display: flex; align-items: center; gap: 8px; height: 52px; font-size: 14px; color: var(--text-3); flex-wrap: wrap; }
.crumbs a:hover { color: var(--primary); }
.crumbs .sep { color: #c3cad8; }
.crumbs .cur { color: var(--text-2); }

/* 分页 */
.pager { display: flex; justify-content: center; gap: 10px; margin-top: 48px; flex-wrap: wrap; }
.pager a, .pager span { min-width: 42px; height: 42px; padding: 0 14px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--line); border-radius: var(--radius); font-size: 14px; color: var(--text-2); background: #fff; }
.pager a:hover { border-color: var(--primary); color: var(--primary); }
.pager .active { background: var(--primary); border-color: var(--primary); color: #fff; }
.pager .disabled { opacity: .45; pointer-events: none; }

/* 产品详情 */
.pd-top { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start; }
.pd-gallery__main { border: 1px solid var(--line); border-radius: var(--radius-lg); aspect-ratio: 4/3; display: flex; align-items: center; justify-content: center; padding: 24px; background: #fff; }
.pd-gallery__main img { max-width: 100%; max-height: 100%; object-fit: contain; }
.pd-thumbs { display: flex; gap: 12px; margin-top: 14px; flex-wrap: wrap; }
.pd-thumbs button { width: 86px; height: 86px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; padding: 6px; cursor: pointer; transition: .25s; }
.pd-thumbs button:hover, .pd-thumbs button.active { border-color: var(--primary); }
.pd-thumbs img { width: 100%; height: 100%; object-fit: contain; }
.pd-info h1 { font-size: 30px; margin-bottom: 14px; }
.pd-info .model { display: inline-block; background: var(--primary-l); color: var(--primary); padding: 4px 14px; border-radius: 4px; font-size: 14px; font-weight: 700; margin-bottom: 16px; }
.pd-summary { color: var(--text-2); padding: 16px 18px; background: var(--bg-soft); border-radius: var(--radius); border-left: 4px solid var(--primary); margin-bottom: 22px; }
.pd-points { display: grid; gap: 12px; margin-bottom: 26px; }
.pd-point { display: flex; gap: 12px; font-size: 15px; color: var(--text-2); }
.pd-point .dot { flex: 0 0 20px; height: 20px; border-radius: 50%; background: var(--primary-l); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 12px; margin-top: 2px; }
.pd-actions { display: flex; gap: 14px; flex-wrap: wrap; padding-top: 22px; border-top: 1px solid var(--line); }
.pd-contact { display: flex; align-items: center; gap: 14px; font-size: 15px; color: var(--text-2); }
.pd-contact b { color: var(--primary); font-size: 22px; }

.pd-tabs { display: flex; gap: 0; border-bottom: 2px solid var(--line); margin: 54px 0 30px; flex-wrap: wrap; }
.pd-tabs button { padding: 14px 30px; border: 0; background: transparent; font-size: 17px; font-weight: 700; color: var(--text-2); cursor: pointer; position: relative; }
.pd-tabs button.active { color: var(--primary); }
.pd-tabs button.active::after { content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px; background: var(--primary); }
.pd-panel { display: none; }
.pd-panel.active { display: block; }
.rich { color: var(--text-2); font-size: 15.5px; line-height: 1.9; }
.rich img { max-width: 100%; height: auto; margin: 12px 0; border-radius: 6px; }
.rich p { margin: 12px 0; }
.rich table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14.5px; }
.rich table td, .rich table th { border: 1px solid var(--line); padding: 9px 12px; }
.rich table tr:nth-child(even) { background: var(--bg-soft); }
.rich strong { color: var(--text); }

/* 联系页 */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 44px; align-items: start; }
.contact-cards { display: grid; gap: 18px; }
.contact-card { display: flex; gap: 16px; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; }
.contact-card .ico { width: 50px; height: 50px; flex: 0 0 50px; border-radius: 12px; background: var(--primary-l); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 22px; }
.contact-card h4 { font-size: 16px; margin-bottom: 4px; }
.contact-card p { color: var(--text-2); margin: 0; font-size: 15px; }
.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 32px; box-shadow: var(--shadow); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 14px; color: var(--text-2); margin-bottom: 7px; }
.field label .req { color: #e23b3b; }
.field input, .field textarea { width: 100%; height: 46px; border: 1px solid var(--line); border-radius: var(--radius); padding: 0 14px; background: var(--bg-soft); transition: .25s; }
.field textarea { height: 130px; padding: 12px 14px; resize: vertical; }
.field input:focus, .field textarea:focus { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(0,91,172,.1); }
.form-tip { font-size: 13px; color: var(--text-3); margin-top: 10px; }
.alert { padding: 12px 16px; border-radius: var(--radius); margin-bottom: 18px; font-size: 14.5px; }
.alert--ok { background: #e8f7ee; color: #1a7f45; border: 1px solid #b7e6c9; }
.alert--err { background: #fdecec; color: #c0392b; border: 1px solid #f5c2c2; }

/* 文章详情 */
.article-body { max-width: 900px; margin: 0 auto; }
.article-head { text-align: center; padding-bottom: 26px; border-bottom: 1px solid var(--line); margin-bottom: 30px; }
.article-head h1 { font-size: 30px; margin-bottom: 14px; }
.article-head .meta { color: var(--text-3); font-size: 14px; display: flex; gap: 20px; justify-content: center; }
.article-nav { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--line); display: grid; gap: 10px; font-size: 14.5px; color: var(--text-2); }
.article-nav a:hover { color: var(--primary); }

/* 搜索空态 */
.empty { text-align: center; padding: 70px 20px; color: var(--text-3); }
.empty .big { font-size: 54px; margin-bottom: 14px; }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1400px) {
  .nav-list > li > a { padding: 0 15px; font-size: 15px; }
  .header-search input { width: 140px; }
}
@media (max-width: 1200px) {
  .header-tel { display: none; }
  .grid--4 { grid-template-columns: repeat(3, 1fr); }
  .culture-grid { grid-template-columns: repeat(3, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
}
@media (max-width: 992px) {
  :root { --header-h: 68px; }
  .header-search { display: none; }
  .nav-toggle { display: block; }
  .main-nav { position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0; background: #fff; display: block; padding: 20px; overflow-y: auto; transform: translateX(-100%); transition: transform .35s; }
  body.nav-open .main-nav { transform: translateX(0); }
  .nav-list { display: block; }
  .nav-list > li > a { height: auto; line-height: 1.4; padding: 14px 6px; border-bottom: 1px solid var(--line); }
  .nav-list > li > a::after { display: none; }
  .mega, .mega--wide { position: static; width: 100% !important; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: 0; border-left: 3px solid var(--primary-l); border-radius: 0; margin-left: 12px; padding: 4px 0 10px; display: none; }
  .nav-list > li.open .mega { display: block; }
  .mega--wide .col { width: 100%; }
  .hero { height: 480px; }
  .hero-copy h1 { font-size: 34px; }
  .hero-copy p { font-size: 16px; }
  .quick-bar .container { grid-template-columns: 1fr 1fr; }
  .cat-layout { grid-template-columns: 1fr; }
  .cat-side { position: static; }
  .about-grid, .contact-grid, .pd-top { grid-template-columns: 1fr; gap: 30px; }
  .grid--4, .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .news-cols { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .art-row { grid-template-columns: 150px 1fr; gap: 18px; }
}
@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .section { padding: 46px 0; }
  .logo img { height: 36px; }
  .logo .logo-text strong { font-size: 16px; }
  .logo .logo-text span { display: none; }
  .hero { height: 420px; }
  .hero-copy h1 { font-size: 26px; }
  .hero-copy p { font-size: 15px; margin-bottom: 22px; }
  .hero-arrow { display: none; }
  .sec-head h2 { font-size: 24px; }
  .grid--4, .grid--3, .grid--2 { grid-template-columns: 1fr 1fr; gap: 14px; }
  .quick-bar .container { grid-template-columns: 1fr; }
  .quick-item { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.1); }
  .stats, .culture-grid { grid-template-columns: 1fr 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .page-banner h1 { font-size: 26px; }
  .pd-info h1 { font-size: 22px; }
  .art-row { grid-template-columns: 1fr; }
  .art-row__img { max-width: 100%; }
}