/* ============================================================
   ezt.cc 2026 新版模板 — 工程蓝白
   ============================================================ */

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

:root {
  --navy: #0D2B45;
  --navy-2: #12395B;
  --blue: #1B5E96;
  --blue-light: #3E86C0;
  --sky: #EAF3FB;
  --ink: #14283B;
  --text: #4B6072;
  --muted: #7E90A2;
  --line: #E2EAF2;
  --bg: #F5F8FB;
  --white: #fff;
  --accent: #D99B3E;
  --radius: 10px;
  --shadow: 0 18px 40px rgba(13, 43, 69, .08);
  --container: 1240px;
}

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; transition: color .25s; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5 { color: var(--ink); font-weight: 700; line-height: 1.35; }
button { font-family: inherit; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 48px; padding: 0 28px; border-radius: 4px;
  font-size: 15px; font-weight: 600; letter-spacing: .5px;
  border: 1px solid transparent; cursor: pointer; transition: all .25s;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-light); color: #fff; transform: translateY(-2px); box-shadow: 0 12px 24px rgba(27, 94, 150, .28); }
.btn-ghost { border-color: rgba(255, 255, 255, .55); color: #fff; }
.btn-ghost:hover { background: #fff; color: var(--navy); }
.btn-outline { border-color: var(--line); color: var(--blue); background: #fff; }
.btn-outline:hover { border-color: var(--blue); background: var(--blue); color: #fff; }
.btn-sm { height: 40px; padding: 0 20px; font-size: 14px; }

/* ---------- 顶部信息条 ---------- */
.topbar { background: var(--navy); color: #B9CBDC; font-size: 13px; }
.topbar-in { display: flex; align-items: center; justify-content: space-between; height: 38px; }
.topbar-left { display: flex; align-items: center; gap: 18px; }
.topbar-left .sep { width: 1px; height: 12px; background: rgba(255, 255, 255, .18); }
.topbar-right { display: flex; align-items: center; gap: 8px; color: #8FA9BF; }

/* ---------- 主头部 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 900; background: #fff;
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s;
}
.site-header.is-stuck { box-shadow: 0 8px 26px rgba(13, 43, 69, .1); }
.nav-in { display: flex; align-items: center; justify-content: space-between; height: 82px; }
.logo { display: flex; align-items: center; gap: 10px; flex: none; }
.logo img { height: 46px; width: auto; }

.main-nav { margin-left: 24px; }
.main-nav > ul { display: flex; align-items: center; }
.main-nav > ul > li { position: relative; }
.main-nav > ul > li > a {
  display: flex; align-items: center; height: 82px; padding: 0 17px;
  font-size: 15.5px; font-weight: 500; color: var(--ink); white-space: nowrap;
}
.main-nav > ul > li > a::after {
  content: ""; position: absolute; left: 17px; right: 17px; bottom: 18px; height: 2px;
  background: var(--blue); transform: scaleX(0); transform-origin: left; transition: transform .3s;
}
.main-nav > ul > li:hover > a,
.main-nav > ul > li.current > a { color: var(--blue); }
.main-nav > ul > li:hover > a::after,
.main-nav > ul > li.current > a::after { transform: scaleX(1); }
.main-nav .has-child > a .caret {
  display: inline-block; width: 6px; height: 6px; margin-left: 6px;
  border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
}
.sub-menu {
  position: absolute; top: 100%; left: 8px; min-width: 190px;
  background: #fff; border-top: 3px solid var(--blue); border-radius: 0 0 6px 6px;
  box-shadow: 0 18px 36px rgba(13, 43, 69, .14);
  padding: 8px 0; opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all .25s;
}
.main-nav li:hover > .sub-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.sub-menu li a { display: block; padding: 9px 20px; font-size: 14px; color: var(--text); }
.sub-menu li a:hover { background: var(--sky); color: var(--blue); }

.nav-actions { display: flex; align-items: center; gap: 14px; flex: none; }
.icon-btn {
  width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 50%;
  background: #fff; color: var(--navy); display: flex; align-items: center; justify-content: center; cursor: pointer;
  transition: all .25s;
}
.icon-btn:hover { background: var(--sky); border-color: var(--blue-light); color: var(--blue); }
.nav-phone { display: flex; align-items: center; gap: 10px; }
.nav-phone .txt { line-height: 1.2; text-align: right; }
.nav-phone .txt small { display: block; font-size: 11px; color: var(--muted); letter-spacing: 1px; }
.nav-phone .txt b { font-size: 17px; color: var(--navy); letter-spacing: .5px; }

.hamburger { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 4px; background: #fff; cursor: pointer; }
.hamburger span { display: block; width: 20px; height: 2px; background: var(--navy); margin: 4px auto; transition: .3s; }

/* 搜索层 */
.search-layer {
  position: fixed; inset: 0; background: rgba(9, 27, 45, .94); z-index: 1200;
  display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transition: .3s;
}
.search-layer.open { opacity: 1; visibility: visible; }
.search-layer form { width: min(680px, 86vw); display: flex; border-bottom: 2px solid rgba(255, 255, 255, .6); }
.search-layer input {
  flex: 1; background: transparent; border: 0; outline: 0; color: #fff;
  font-size: 20px; padding: 14px 4px;
}
.search-layer input::placeholder { color: rgba(255, 255, 255, .5); }
.search-layer button { background: transparent; border: 0; color: #fff; font-size: 20px; cursor: pointer; padding: 0 12px; }
.search-close {
  position: absolute; top: 40px; right: 52px; width: 44px; height: 44px;
  border: 1px solid rgba(255, 255, 255, .4); border-radius: 50%;
  background: transparent; color: #fff; font-size: 20px; cursor: pointer;
}

/* ---------- 首屏 ---------- */
.hero {
  position: relative; min-height: 600px; display: flex; align-items: center;
  background: #0D2B45 url(../img/hero-b4.jpg) center center / cover no-repeat; color: #fff; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(6, 24, 41, .94) 0%, rgba(7, 28, 48, .82) 42%, rgba(8, 30, 52, .38) 100%);
}
.hero::after {
  content: ""; position: absolute; right: -80px; bottom: -120px; width: 520px; height: 520px;
  border: 1px solid rgba(255, 255, 255, .12); border-radius: 50%;
}
.hero-in { position: relative; z-index: 2; padding-top: 96px; padding-bottom: 120px; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 12px; letter-spacing: 3px; color: #8DB7D6; text-transform: uppercase;
}
.hero-eyebrow::before { content: ""; width: 34px; height: 1px; background: var(--accent); }
.hero h1 {
  margin: 22px 0 22px; max-width: 900px;
  font-size: 48px; line-height: 1.28; color: #fff; font-weight: 800; letter-spacing: 1px;
}
.hero h1 em { font-style: normal; color: #7FB6DF; }
.hero-lead { max-width: 660px; font-size: 16px; line-height: 1.9; color: rgba(255, 255, 255, .78); }
.hero-actions { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }
.hero-facts {
  display: flex; flex-wrap: wrap; gap: 0; margin-top: 54px;
  border-top: 1px solid rgba(255, 255, 255, .16); padding-top: 26px; max-width: 760px;
}
.hero-facts li { padding-right: 46px; margin-right: 46px; border-right: 1px solid rgba(255, 255, 255, .14); }
.hero-facts li:last-child { border-right: 0; margin-right: 0; padding-right: 0; }
.hero-facts b { display: block; font-size: 26px; color: #fff; font-weight: 700; letter-spacing: .5px; }
.hero-facts span { font-size: 13px; color: rgba(255, 255, 255, .62); }

/* ---------- 数据条 ---------- */
.stats { position: relative; z-index: 5; margin-top: -58px; }
.stats-card {
  background: #fff; border-radius: 8px; box-shadow: 0 20px 50px rgba(13, 43, 69, .12);
  display: grid; grid-template-columns: repeat(4, 1fr); overflow: hidden;
}
.stat { padding: 30px 20px; text-align: center; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat b { display: block; font-size: 38px; line-height: 1.2; font-weight: 800; color: var(--navy-2); font-family: "DIN Alternate", Arial, sans-serif; }
.stat b i { font-style: normal; font-size: 20px; color: var(--blue); margin-left: 2px; }
.stat span { font-size: 13.5px; color: var(--muted); letter-spacing: 1px; }

/* ---------- 区块标题 ---------- */
.section { padding: 88px 0; }
.section.tight { padding: 66px 0; }
.sec-head { margin-bottom: 46px; }
.sec-head .eyebrow {
  display: inline-block; font-size: 12px; letter-spacing: 3px; color: var(--blue);
  text-transform: uppercase; font-weight: 600; margin-bottom: 12px;
}
.sec-head h2 { font-size: 32px; letter-spacing: .5px; }
.sec-head p { margin-top: 14px; max-width: 640px; color: var(--muted); }
.sec-head.center { text-align: center; }
.sec-head.center p { margin-left: auto; margin-right: auto; }
.sec-head.row { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; }
.sec-head.row .more { font-size: 14px; color: var(--blue); white-space: nowrap; padding-bottom: 6px; }
.sec-head.row .more::after { content: " →"; }

/* ---------- 产品体系 ---------- */
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.pcard {
  position: relative; display: block; padding: 28px 26px 24px; background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  transition: all .3s;
}
.pcard::before {
  content: ""; position: absolute; left: 0; top: 0; width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--blue-light)); transform: scaleX(0); transform-origin: left; transition: transform .3s;
}
.pcard:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: #C9DCEE; }
.pcard:hover::before { transform: scaleX(1); }
.pcard .no { font-size: 13px; font-weight: 700; color: #B7C9D9; letter-spacing: 2px; font-family: Arial, sans-serif; }
.pcard h3 { font-size: 19px; margin: 10px 0 10px; }
.pcard p { font-size: 13.8px; color: var(--muted); line-height: 1.75; min-height: 48px; }
.pcard .go { display: inline-block; margin-top: 14px; font-size: 13.5px; color: var(--blue); font-weight: 500; }
.pcard .go::after { content: " →"; transition: margin .25s; }
.pcard:hover .go::after { margin-left: 4px; }
.pcard.feature { background: var(--navy-2); border-color: var(--navy-2); }
.pcard.feature h3 { color: #fff; }
.pcard.feature p { color: rgba(255, 255, 255, .6); }
.pcard.feature .no { color: rgba(255, 255, 255, .3); }
.pcard.feature .go { color: #8FC4EA; }
.pcard.feature:hover { background: #16476F; }

/* ---------- 标准与质量（深色） ---------- */
.standards { position: relative; background: var(--navy); color: #fff; overflow: hidden; }
.standards::before {
  content: "STANDARD"; position: absolute; right: -40px; top: 30px;
  font-size: 150px; font-weight: 800; letter-spacing: 10px; color: rgba(255, 255, 255, .03);
  font-family: Arial, sans-serif; line-height: 1;
}
.standards .sec-head h2 { color: #fff; }
.standards .sec-head p { color: rgba(255, 255, 255, .6); }
.standards .sec-head .eyebrow { color: #7FB6DF; }
.std-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; position: relative; }
.std {
  border: 1px solid rgba(255, 255, 255, .14); border-radius: 8px; padding: 24px 22px;
  background: rgba(255, 255, 255, .03); transition: all .3s;
}
.std:hover { border-color: rgba(255, 255, 255, .32); background: rgba(255, 255, 255, .06); }
.std .code { font-size: 15px; font-weight: 700; color: #8FC4EA; letter-spacing: .5px; }
.std h4 { color: #fff; font-size: 16px; margin: 10px 0 8px; font-weight: 600; }
.std p { font-size: 13px; line-height: 1.7; color: rgba(255, 255, 255, .55); }
.qc-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 40px; padding-top: 34px; border-top: 1px solid rgba(255, 255, 255, .12); }
.qc { display: flex; gap: 16px; }
.qc .idx { flex: none; width: 38px; height: 38px; border-radius: 50%; border: 1px solid rgba(255, 255, 255, .3); display: flex; align-items: center; justify-content: center; font-size: 13px; color: #8FC4EA; }
.qc h4 { color: #fff; font-size: 15.5px; font-weight: 600; margin-bottom: 4px; }
.qc p { font-size: 13px; color: rgba(255, 255, 255, .55); }

/* ---------- 案例 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case {
  display: block; position: relative; border-radius: var(--radius); overflow: hidden; background: #0D2B45;
}
.case .ph { position: relative; height: 260px; overflow: hidden; }
.case .ph img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s; }
.case:hover .ph img { transform: scale(1.06); }
.case .mask {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(6, 24, 41, 0) 35%, rgba(6, 24, 41, .88) 100%);
}
.case .info { position: absolute; left: 0; right: 0; bottom: 0; padding: 22px 24px; color: #fff; }
.case .tag { display: inline-block; font-size: 12px; color: #9CCBEC; border: 1px solid rgba(156, 203, 236, .4); padding: 1px 8px; border-radius: 2px; margin-bottom: 10px; }
.case h3 { color: #fff; font-size: 17.5px; font-weight: 600; }
.case .meta { font-size: 12.5px; color: rgba(255, 255, 255, .6); margin-top: 6px; }

/* ---------- 流程 ---------- */
.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; margin-top: 10px; }
.step { position: relative; padding: 0 18px; text-align: left; }
.step::before {
  content: ""; position: absolute; top: 25px; left: 50%; right: -50%; height: 1px;
  background: linear-gradient(90deg, var(--blue-light), var(--line));
}
.step:last-child::before { display: none; }
.step .num {
  position: relative; z-index: 2; width: 50px; height: 50px; border-radius: 50%;
  background: #fff; border: 1px solid var(--line); color: var(--blue);
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 700; font-family: Arial, sans-serif; margin-bottom: 18px;
}
.step:hover .num { background: var(--blue); border-color: var(--blue); color: #fff; }
.step h4 { font-size: 16px; margin-bottom: 6px; }
.step p { font-size: 13px; color: var(--muted); line-height: 1.7; }

/* ---------- 关于 ---------- */
.about-band { display: grid; grid-template-columns: 1.05fr 1fr; gap: 60px; align-items: center; }
.about-media { position: relative; }
.about-media img { border-radius: var(--radius); width: 100%; height: 440px; object-fit: cover; object-position: 50% 65%; }
.about-media .badge {
  position: absolute; right: -18px; bottom: 26px; background: var(--blue); color: #fff;
  padding: 18px 22px; border-radius: 6px; text-align: center; box-shadow: 0 16px 32px rgba(27, 94, 150, .3);
}
.about-media .badge b { display: block; font-size: 30px; line-height: 1.1; font-family: Arial, sans-serif; }
.about-media .badge span { font-size: 12px; opacity: .85; }
.about-text h2 { font-size: 30px; margin: 10px 0 18px; }
.about-text p { margin-bottom: 12px; font-size: 14.5px; line-height: 1.9; }
.about-points { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 22px; margin: 24px 0 28px; }
.about-points li { font-size: 14px; color: var(--ink); display: flex; gap: 9px; align-items: flex-start; }
.about-points li::before { content: "✓"; color: var(--blue); font-weight: 700; }

/* ---------- 资讯 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.news-item {
  display: block; padding: 26px 24px; border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff; transition: all .3s;
}
.news-item:hover { border-color: #C9DCEE; box-shadow: var(--shadow); transform: translateY(-4px); }
.news-item .date { font-size: 12.5px; color: var(--muted); letter-spacing: 1px; }
.news-item h3 { font-size: 17px; line-height: 1.6; margin: 10px 0 10px; }
.news-item p { font-size: 13.5px; color: var(--muted); line-height: 1.75; }
.news-item .cat { display: inline-block; margin-top: 16px; font-size: 12px; color: var(--blue); background: var(--sky); padding: 2px 10px; border-radius: 2px; }

/* ---------- FAQ ---------- */
.faq-wrap { max-width: 900px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 22px 4px; cursor: pointer; list-style: none; font-size: 16.5px; color: var(--ink); font-weight: 600;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 22px; font-weight: 300; color: var(--blue); transition: transform .3s; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .ans { padding: 0 4px 22px; font-size: 14px; color: var(--muted); line-height: 1.9; max-width: 780px; }

/* ---------- CTA ---------- */
.cta { background: linear-gradient(115deg, var(--navy) 0%, var(--navy-2) 55%, #1B5E96 100%); color: #fff; }
.cta-in { display: flex; align-items: center; justify-content: space-between; gap: 40px; padding-top: 52px; padding-bottom: 52px; }
.cta h2 { color: #fff; font-size: 28px; }
.cta p { color: rgba(255, 255, 255, .65); margin-top: 8px; font-size: 14.5px; }
.cta-right { display: flex; align-items: center; gap: 26px; flex: none; }
.cta-phone small { display: block; font-size: 12px; color: rgba(255, 255, 255, .55); letter-spacing: 2px; }
.cta-phone b { font-size: 30px; letter-spacing: .5px; }

/* ---------- 页脚 ---------- */
.site-footer { background: #0A2237; color: #93A9BD; font-size: 13.5px; }
.footer-main { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 46px; padding: 64px 0 46px; }
.footer-brand img { height: 44px; background: #fff; padding: 6px 10px; border-radius: 4px; }
.footer-brand p { margin-top: 18px; line-height: 1.9; color: #8398AC; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 18px; letter-spacing: 1px; }
.footer-col li { margin-bottom: 10px; }
.footer-col a:hover { color: #fff; }
.footer-contact li { display: flex; gap: 10px; margin-bottom: 14px; line-height: 1.7; }
.footer-contact .k { color: #6E8599; flex: none; }
.footer-contact b { color: #fff; font-size: 16px; font-weight: 600; }
.footer-links { border-top: 1px solid rgba(255, 255, 255, .08); padding: 18px 0; font-size: 13px; }
.footer-links a { margin-right: 16px; color: #8398AC; }
.footer-links a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .08); padding: 18px 0 22px; display: flex; justify-content: space-between; gap: 20px; color: #6E8599; font-size: 12.5px; flex-wrap: wrap; }
.footer-bottom a:hover { color: #fff; }

/* ---------- 返回顶部 ---------- */
.to-top {
  position: fixed; right: 26px; bottom: 90px; width: 44px; height: 44px; z-index: 800;
  background: var(--navy-2); color: #fff; border: 0; border-radius: 4px; cursor: pointer;
  display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transition: .3s;
}
.to-top.show { opacity: 1; visibility: visible; }
.to-top:hover { background: var(--blue); }

/* ============================================================
   内页：面包屑 / 文章详情
   ============================================================ */
.page-strip { background: var(--bg); border-bottom: 1px solid var(--line); padding: 18px 0; }
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.breadcrumb a:hover { color: var(--blue); }
.breadcrumb .sep { color: #B9C7D4; }

.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: 46px; padding: 46px 0 80px; }

.article-head { border-bottom: 1px solid var(--line); padding-bottom: 26px; margin-bottom: 30px; }
.article-head .cat {
  display: inline-block; font-size: 12.5px; color: var(--blue); background: var(--sky);
  padding: 3px 10px; border-radius: 2px; margin-bottom: 14px;
}
.article-head h1 { font-size: 30px; line-height: 1.45; letter-spacing: .3px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 22px; margin-top: 16px; font-size: 13px; color: var(--muted); }

.article-lead {
  background: var(--sky); border-left: 3px solid var(--blue); padding: 18px 22px;
  font-size: 14.5px; color: var(--ink); line-height: 1.9; margin-bottom: 30px;
}

.article-body { font-size: 15.5px; line-height: 1.95; color: #3D5265; }
.article-body h2 {
  font-size: 21px; margin: 40px 0 16px; padding-left: 14px; border-left: 4px solid var(--blue);
  line-height: 1.5;
}
.article-body h3 { font-size: 17.5px; margin: 30px 0 12px; color: var(--navy-2); }
.article-body p { margin-bottom: 16px; }
.article-body strong { color: var(--ink); }
.article-body a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
.article-body img { border-radius: 6px; margin: 20px 0; }
.article-body ul, .article-body ol { margin: 0 0 18px 22px; }
.article-body ul li { list-style: disc; margin-bottom: 8px; }
.article-body ol li { list-style: decimal; margin-bottom: 8px; }
.article-body table { width: 100%; border-collapse: collapse; margin: 22px 0; font-size: 14px; }
.article-body th, .article-body td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; }
.article-body th { background: var(--bg); color: var(--navy-2); font-weight: 600; }
.article-body blockquote {
  border-left: 3px solid var(--accent); background: #FBF7EF; padding: 14px 18px;
  color: #6B5B3E; font-size: 14px; margin: 22px 0;
}

.article-foot { margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--line); font-size: 13.5px; color: var(--muted); }
.kw-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.kw-links a { display: inline-block; padding: 4px 12px; border: 1px solid var(--line); border-radius: 3px; color: var(--text); font-size: 13px; }
.kw-links a:hover { border-color: var(--blue); color: var(--blue); }

/* 侧栏 */
.sidebar { position: sticky; top: 106px; align-self: start; }
.widget { border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; margin-bottom: 20px; background: #fff; }
.widget h3 { font-size: 16px; padding-bottom: 12px; margin-bottom: 14px; border-bottom: 1px solid var(--line); position: relative; }
.widget h3::after { content: ""; position: absolute; left: 0; bottom: -1px; width: 36px; height: 2px; background: var(--blue); }
.widget ul li { border-bottom: 1px dashed var(--line); }
.widget ul li:last-child { border-bottom: 0; }
.widget ul li a { display: block; padding: 9px 0; font-size: 13.8px; color: var(--text); }
.widget ul li a:hover { color: var(--blue); padding-left: 4px; }
.widget .hot a { display: flex; gap: 12px; padding: 10px 0; }
.widget .hot .n { flex: none; width: 20px; height: 20px; border-radius: 2px; background: #EDF2F7; color: var(--muted); font-size: 12px; display: flex; align-items: center; justify-content: center; font-family: Arial, sans-serif; }
.widget .hot li:nth-child(-n+3) .n { background: var(--blue); color: #fff; }
.widget .hot a { font-size: 13.5px; line-height: 1.6; color: var(--text); }
.widget-contact { background: var(--navy); border-color: var(--navy); color: #fff; text-align: center; }
.widget-contact h3 { color: #fff; border-color: rgba(255, 255, 255, .15); }
.widget-contact h3::after { background: var(--accent); }
.widget-contact p { font-size: 13px; color: rgba(255, 255, 255, .6); }
.widget-contact b { display: block; font-size: 26px; color: #fff; margin: 8px 0 14px; letter-spacing: .5px; }
.widget-contact .btn { width: 100%; }

/* 相关文章 / 上下篇 */
.related { margin-top: 46px; }
.related h3 { font-size: 19px; margin-bottom: 18px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.related-grid a { display: block; padding: 16px 18px; background: var(--bg); border-radius: 6px; font-size: 14px; line-height: 1.6; color: var(--ink); transition: .25s; }
.related-grid a:hover { background: var(--sky); color: var(--blue); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1200px) {
  .hero h1 { font-size: 40px; }
  .main-nav > ul > li > a { padding: 0 12px; font-size: 14.5px; }
  .product-grid { grid-template-columns: repeat(3, 1fr); }
  .nav-phone { display: none; }
}

@media (max-width: 992px) {
  .topbar-right { display: none; }
  .hamburger { display: block; }
  .main-nav {
    position: fixed; top: 0; right: 0; width: 300px; height: 100vh; margin: 0;
    background: #fff; z-index: 1100; padding: 80px 24px 24px; overflow-y: auto;
    transform: translateX(100%); transition: transform .3s; box-shadow: -10px 0 40px rgba(0, 0, 0, .12);
  }
  .main-nav.open { transform: translateX(0); }
  .main-nav > ul { flex-direction: column; align-items: stretch; }
  .main-nav > ul > li > a { height: auto; padding: 14px 0; border-bottom: 1px solid var(--line); justify-content: space-between; }
  .main-nav > ul > li > a::after { display: none; }
  .sub-menu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: 0; padding: 0 0 8px 14px; display: none; }
  .main-nav li.open > .sub-menu { display: block; }
  .nav-mask { position: fixed; inset: 0; background: rgba(9, 27, 45, .5); z-index: 1000; opacity: 0; visibility: hidden; transition: .3s; }
  .nav-mask.show { opacity: 1; visibility: visible; }

  .hero { min-height: 520px; }
  .hero h1 { font-size: 34px; }
  .stats-card { grid-template-columns: repeat(2, 1fr); }
  .stat { border-bottom: 1px solid var(--line); }
  .stat:nth-child(2n) { border-right: 0; }
  .std-grid { grid-template-columns: repeat(2, 1fr); }
  .qc-row { grid-template-columns: 1fr; gap: 24px; }
  .case-grid, .news-grid, .related-grid { grid-template-columns: 1fr 1fr; }
  .flow { grid-template-columns: repeat(2, 1fr); gap: 30px 0; }
  .step::before { display: none; }
  .about-band { grid-template-columns: 1fr; gap: 40px; }
  .article-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .cta-in { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 640px) {
  .container { padding: 0 18px; }
  .topbar-left .hide-sm, .topbar-left .sep { display: none; }
  .topbar-in { justify-content: center; }
  .nav-in { height: 68px; }
  .logo img { height: 38px; }
  .hero { min-height: 460px; }
  .hero-in { padding-top: 66px; padding-bottom: 80px; }
  .hero h1 { font-size: 26px; }
  .hero-lead { font-size: 14px; }
  .hero-facts { gap: 18px 0; }
  .hero-facts li { padding-right: 24px; margin-right: 24px; }
  .hero-facts b { font-size: 20px; }
  .section { padding: 58px 0; }
  .sec-head h2 { font-size: 24px; }
  .sec-head.row { flex-direction: column; align-items: flex-start; }
  .product-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .pcard { padding: 20px 18px; }
  .pcard h3 { font-size: 16.5px; }
  .pcard p { font-size: 12.5px; min-height: 60px; }
  .std-grid { grid-template-columns: 1fr; }
  .case-grid, .news-grid, .related-grid { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr; gap: 32px; padding: 44px 0 30px; }
  .article-head h1 { font-size: 22px; }
  .article-body { font-size: 15px; }
  .cta h2 { font-size: 22px; }
  .cta-phone b { font-size: 24px; }
  .footer-bottom { flex-direction: column; }
}

/* ============================================================
   内页补充：分页 / 列表 / 视频 / 标签 / 表单 / 404
   ============================================================ */
.page-main { padding: 46px 0 80px; }

/* 分页 */
.pagination { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 34px; }
.pagination .page-item { list-style: none; }
.pagination .page-link { display: flex; align-items: center; justify-content: center; min-width: 38px; height: 38px; padding: 0 12px; border: 1px solid var(--line); border-radius: 4px; font-size: 14px; color: var(--text); background: #fff; transition: .25s; }
.pagination .page-item.active .page-link,
.pagination .page-link:hover { background: var(--blue); border-color: var(--blue); color: #fff; }

/* 栏目标签 */
.tab-btns { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.tab-btns a { padding: 7px 20px; border: 1px solid var(--line); border-radius: 20px; font-size: 14px; color: var(--text); background: #fff; transition: .25s; }
.tab-btns a:hover,
.tab-btns a.active { background: var(--blue); border-color: var(--blue); color: #fff; }

/* 新闻列表 */
.nlist { display: flex; flex-direction: column; gap: 18px; }
.nitem { display: flex; gap: 22px; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; transition: .3s; }
.nitem:hover { box-shadow: var(--shadow); border-color: #C9DCEE; }
.nitem-img { flex: none; width: 240px; height: 160px; border-radius: 6px; overflow: hidden; }
.nitem-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.nitem:hover .nitem-img img { transform: scale(1.05); }
.nitem-body { flex: 1; min-width: 0; }
.nitem-body h3 { font-size: 18px; line-height: 1.5; margin-bottom: 8px; }
.nitem-body p { font-size: 13.5px; color: var(--muted); line-height: 1.8; }
.nitem-meta { display: flex; gap: 18px; margin-top: 12px; font-size: 12.5px; color: var(--muted); }

/* 视频 */
.vgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.vcard .vph { position: relative; display: block; height: 200px; border-radius: var(--radius); overflow: hidden; }
.vcard .vph img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.vcard .vph:hover img { transform: scale(1.05); }
.vcard .play { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; background: rgba(9, 27, 45, .35); color: #fff; font-size: 32px; transition: .3s; }
.vcard .vph:hover .play { background: rgba(27, 94, 150, .5); }
.vcard h3 { font-size: 15.5px; margin-top: 12px; }

/* 标签云 */
.tagcloud { display: flex; flex-wrap: wrap; gap: 10px; }
.tagcloud a { padding: 6px 16px; border: 1px solid var(--line); border-radius: 3px; font-size: 13.5px; color: var(--text); background: #fff; transition: .25s; }
.tagcloud a:hover { border-color: var(--blue); color: var(--blue); }

/* 联系页 */
.contact-info .ci { display: flex; gap: 16px; padding: 18px 0; border-bottom: 1px dashed var(--line); align-items: baseline; }
.contact-info .ci .k { flex: none; width: 76px; color: var(--muted); font-size: 14px; }
.contact-info .ci b { color: var(--ink); font-size: 16.5px; font-weight: 600; }
.cform { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; }
.cform input, .cform textarea { width: 100%; border: 1px solid var(--line); border-radius: 4px; padding: 12px 14px; font-size: 14px; font-family: inherit; margin-bottom: 14px; color: var(--ink); }
.cform input:focus, .cform textarea:focus { outline: 0; border-color: var(--blue-light); box-shadow: 0 0 0 3px rgba(62, 134, 192, .12); }
.cmap iframe { width: 100%; height: 420px; border: 0; display: block; }

/* 404 */
.p404 { text-align: center; padding: 110px 0; }
.p404 .code { font-size: 110px; font-weight: 800; color: var(--navy); line-height: 1; letter-spacing: 4px; }
.p404 p { color: var(--muted); margin: 16px 0 28px; }

/* 六步流程 */
.flow-6 { grid-template-columns: repeat(6, 1fr); }

@media (max-width: 992px) {
  .nitem { flex-direction: column; }
  .nitem-img { width: 100%; height: 180px; }
  .vgrid { grid-template-columns: 1fr 1fr; }
  .flow-6 { grid-template-columns: repeat(2, 1fr); gap: 30px 0; }
}
@media (max-width: 640px) {
  .vgrid { grid-template-columns: 1fr; }
  .flow-6 { grid-template-columns: 1fr; }
  .cform { padding: 22px; }
  .p404 .code { font-size: 72px; }
}