/* ==========================================================
   瑞安市华东锻造有限公司 官网统一样式
   主色调：工业蓝 + 银灰
   ========================================================== */
:root {
  --blue-dark: #0e2f52;
  --blue-primary: #1b4f8a;
  --blue-mid: #2a6cb5;
  --blue-light: #e8f0f9;
  --silver-dark: #6b7684;
  --silver: #9aa4b0;
  --silver-light: #dfe4ea;
  --silver-bg: #f4f6f9;
  --text-main: #22303f;
  --text-sub: #5a6675;
  --white: #ffffff;
  --shadow: 0 6px 24px rgba(14, 47, 82, 0.10);
  --shadow-hover: 0 12px 32px rgba(14, 47, 82, 0.18);
  --radius: 10px;
  --nav-h: 68px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text-main);
  background: var(--white);
  line-height: 1.7;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

/* ---------------- 导航栏（固定置顶） ---------------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 12px rgba(14, 47, 82, 0.08);
  z-index: 1000;
  transition: box-shadow .3s;
}
.navbar .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-logo {
  width: 42px; height: 42px;
  flex: 0 0 42px;
}
.brand-text .brand-cn {
  font-size: 18px;
  font-weight: 700;
  color: var(--blue-dark);
  letter-spacing: 1px;
  line-height: 1.3;
}
.brand-text .brand-en {
  font-size: 10px;
  color: var(--silver-dark);
  letter-spacing: .5px;
  text-transform: uppercase;
  line-height: 1.2;
}
.nav-links {
  display: flex;
  gap: 8px;
}
.nav-links a {
  padding: 7px 15px;
  font-size: 15px;
  color: var(--text-main);
  border-radius: 6px;
  transition: color .25s, background .25s;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  line-height: 1.18;
}
.nav-links a:hover { color: var(--blue-primary); background: var(--blue-light); }
.nav-links a.active {
  color: var(--blue-primary);
  font-weight: 600;
}
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 18px; right: 18px; bottom: 1px;
  height: 3px;
  border-radius: 2px;
  background: var(--blue-primary);
}
.nav-links a .nav-cn { font-size: 15px; }
.nav-links a .nav-en {
  font-size: 10px;
  color: var(--silver);
  letter-spacing: .3px;
  text-transform: uppercase;
  margin-top: 2px;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--blue-primary); background: var(--blue-light); }
.nav-links a:hover .nav-en { color: var(--blue-mid); }
.nav-links a.active .nav-en { color: var(--blue-mid); }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2.5px;
  background: var(--blue-dark);
  margin: 5px 0;
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ---------------- 页面头部 Banner ---------------- */
.page-hero {
  margin-top: var(--nav-h);
  padding: 72px 0 64px;
  background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue-primary) 55%, #33639c 100%);
  position: relative;
  overflow: hidden;
  color: var(--white);
  text-align: center;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(45deg, rgba(255,255,255,0.03) 0 2px, transparent 2px 22px);
}
.page-hero h1 {
  font-size: 34px;
  letter-spacing: 4px;
  position: relative;
}
.page-hero p {
  margin-top: 10px;
  color: rgba(255,255,255,.75);
  letter-spacing: 2px;
  position: relative;
}

/* ---------------- 通用板块 ---------------- */
.section { padding: 72px 0; }
.section.gray { background: var(--silver-bg); }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head .en {
  font-size: 13px;
  color: var(--silver);
  letter-spacing: 4px;
  text-transform: uppercase;
}
.section-head h2 {
  font-size: 30px;
  color: var(--blue-dark);
  margin-top: 6px;
  letter-spacing: 2px;
}
.section-head .bar {
  width: 56px; height: 4px;
  background: linear-gradient(90deg, var(--blue-primary), var(--silver));
  margin: 14px auto 0;
  border-radius: 2px;
}

.btn {
  display: inline-block;
  padding: 12px 34px;
  border-radius: 6px;
  font-size: 15px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all .3s;
  border: none;
}
.btn-primary {
  background: var(--blue-primary);
  color: var(--white);
}
.btn-primary:hover { background: var(--blue-mid); transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.btn-outline {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,.7);
}
.btn-outline:hover { background: rgba(255,255,255,.15); }

/* 滚动渐入动画 */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------------- 首页 Hero 轮播 ---------------- */
.hero {
  margin-top: var(--nav-h);
  position: relative;
  height: min(560px, 72vh);
  overflow: hidden;
}
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1s ease;
  display: flex;
  align-items: center;
}
.hero-slide.active { opacity: 1; z-index: 1; }
.hero-slide .hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-content {
  position: relative;
  z-index: 2;
  color: var(--white);
  width: min(1200px, 92%);
  margin: 0 auto;
}
.hero-content .tag {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid rgba(255,255,255,.5);
  border-radius: 30px;
  font-size: 13px;
  letter-spacing: 2px;
  margin-bottom: 18px;
  background: rgba(255,255,255,.08);
}
.hero-content h1 {
  font-size: clamp(28px, 4.6vw, 48px);
  letter-spacing: 4px;
  line-height: 1.35;
  text-shadow: 0 2px 12px rgba(0,0,0,.3);
}
.hero-content p {
  margin: 16px 0 30px;
  font-size: clamp(14px, 1.6vw, 18px);
  color: rgba(255,255,255,.85);
  letter-spacing: 1px;
  max-width: 620px;
}
.hero-dots {
  position: absolute;
  bottom: 26px; left: 0; right: 0;
  display: flex;
  justify-content: center;
  gap: 10px;
  z-index: 5;
}
.hero-dots button {
  width: 34px; height: 4px;
  border: none;
  border-radius: 2px;
  background: rgba(255,255,255,.4);
  cursor: pointer;
  transition: background .3s;
}
.hero-dots button.active { background: var(--white); }
.hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
  width: 46px; height: 46px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,.18);
  color: var(--white);
  font-size: 20px;
  cursor: pointer;
  transition: background .3s;
}
.hero-arrow:hover { background: rgba(255,255,255,.35); }
.hero-arrow.prev { left: 24px; }
.hero-arrow.next { right: 24px; }

/* ---------------- 首页 公司简介 ---------------- */
.intro-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
}
.intro-text h3 {
  font-size: 24px;
  color: var(--blue-dark);
  margin-bottom: 18px;
}
.intro-text p {
  color: var(--text-sub);
  margin-bottom: 14px;
  text-align: justify;
}
.intro-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 28px;
}
.intro-stats .stat {
  text-align: center;
  padding: 16px 6px;
  background: var(--blue-light);
  border-radius: var(--radius);
}
.intro-stats .num {
  font-size: 26px;
  font-weight: 700;
  color: var(--blue-primary);
}
.intro-stats .num small { font-size: 14px; margin-left: 2px; }
.intro-stats .label { font-size: 13px; color: var(--text-sub); }
.intro-figure {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.intro-figure svg { width: 100%; height: auto; display: block; }

/* ---------------- 核心业务卡片 ---------------- */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.biz-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform .35s, box-shadow .35s;
  display: flex;
  flex-direction: column;
}
.biz-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-hover); }
.biz-card .biz-img { height: 150px; }
.biz-card .biz-img svg { width: 100%; height: 100%; display: block; }
.biz-card .biz-body { padding: 22px 20px 26px; flex: 1; }
.biz-card h3 {
  font-size: 18px;
  color: var(--blue-dark);
  margin-bottom: 10px;
}
.biz-card p { font-size: 14px; color: var(--text-sub); }
.biz-card .more {
  display: inline-block;
  margin-top: 14px;
  font-size: 13px;
  color: var(--blue-primary);
  font-weight: 600;
}
.biz-card .more:hover { text-decoration: underline; }

/* ---------------- 企业优势 ---------------- */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.adv-item {
  background: var(--white);
  border-top: 4px solid var(--blue-primary);
  border-radius: var(--radius);
  padding: 30px 24px;
  box-shadow: var(--shadow);
  transition: transform .3s;
}
.adv-item:hover { transform: translateY(-6px); }
.adv-item .adv-icon {
  width: 58px; height: 58px;
  border-radius: 14px;
  background: var(--blue-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.adv-item .adv-icon svg { width: 32px; height: 32px; }
.adv-item h3 { font-size: 17px; color: var(--blue-dark); margin-bottom: 8px; }
.adv-item p { font-size: 14px; color: var(--text-sub); }

/* ---------------- 新闻轮播 ---------------- */
.news-carousel { position: relative; overflow: hidden; }
.news-track {
  display: flex;
  transition: transform .55s ease;
}
.news-item { flex: 0 0 33.3333%; padding: 0 12px; }
.news-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: transform .3s;
}
.news-card:hover { transform: translateY(-6px); }
.news-card .news-date {
  background: linear-gradient(135deg, var(--blue-primary), var(--blue-mid));
  color: var(--white);
  padding: 14px 20px;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.news-card .news-date .d { font-size: 26px; font-weight: 700; }
.news-card .news-date .ym { font-size: 13px; opacity: .85; }
.news-card .news-body { padding: 20px; flex: 1; }
.news-card h3 { font-size: 16px; color: var(--blue-dark); margin-bottom: 10px; line-height: 1.5; }
.news-card p { font-size: 13.5px; color: var(--text-sub); }
.news-nav {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 30px;
}
.news-nav button {
  width: 42px; height: 42px;
  border-radius: 50%;
  border: 1.5px solid var(--silver-light);
  background: var(--white);
  color: var(--blue-primary);
  font-size: 18px;
  cursor: pointer;
  transition: all .3s;
}
.news-nav button:hover { background: var(--blue-primary); color: var(--white); border-color: var(--blue-primary); }

/* ---------------- CTA 条 ---------------- */
.cta-band {
  background: linear-gradient(120deg, var(--blue-dark), var(--blue-primary));
  color: var(--white);
  padding: 52px 0;
  text-align: center;
}
.cta-band h2 { font-size: 26px; letter-spacing: 2px; margin-bottom: 10px; }
.cta-band p { color: rgba(255,255,255,.8); margin-bottom: 26px; }

/* ---------------- 关于我们：发展历程 ---------------- */
.timeline {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  padding-left: 0;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 3px;
  background: linear-gradient(var(--blue-primary), var(--silver-light));
  transform: translateX(-50%);
}
.tl-item {
  position: relative;
  width: 50%;
  padding: 0 40px 44px;
}
.tl-item:nth-child(odd) { left: 0; text-align: right; }
.tl-item:nth-child(even) { left: 50%; }
.tl-item::before {
  content: "";
  position: absolute;
  top: 6px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--white);
  border: 3px solid var(--blue-primary);
  box-shadow: 0 0 0 4px rgba(27,79,138,.15);
}
.tl-item:nth-child(odd)::before { right: -10px; }
.tl-item:nth-child(even)::before { left: -10px; }
.tl-item .year {
  font-size: 22px;
  font-weight: 700;
  color: var(--blue-primary);
}
.tl-item h3 { font-size: 16px; color: var(--blue-dark); margin: 4px 0 6px; }
.tl-item p { font-size: 14px; color: var(--text-sub); }

/* ---------------- 企业文化 ---------------- */
.culture-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.culture-card {
  background: linear-gradient(160deg, var(--white) 0%, var(--blue-light) 100%);
  border: 1px solid var(--silver-light);
  border-radius: var(--radius);
  padding: 34px 24px;
  text-align: center;
  transition: transform .3s, box-shadow .3s;
}
.culture-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.culture-card .cul-icon {
  width: 64px; height: 64px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--blue-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}
.culture-card .cul-icon svg { width: 30px; height: 30px; }
.culture-card h3 { font-size: 18px; color: var(--blue-dark); margin-bottom: 8px; }
.culture-card p { font-size: 14px; color: var(--text-sub); }

/* ---------------- 团队介绍 ---------------- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.team-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  text-align: center;
  transition: transform .3s;
}
.team-card:hover { transform: translateY(-6px); }
.team-card .avatar {
  height: 170px;
  background: linear-gradient(150deg, var(--blue-light), var(--silver-light));
  display: flex;
  align-items: center;
  justify-content: center;
}
.team-card .avatar svg { width: 90px; height: 90px; }
.team-card .team-body { padding: 18px 16px 24px; }
.team-card h3 { font-size: 17px; color: var(--blue-dark); }
.team-card .role {
  display: inline-block;
  font-size: 12.5px;
  color: var(--blue-primary);
  background: var(--blue-light);
  border-radius: 20px;
  padding: 3px 14px;
  margin: 8px 0 10px;
}
.team-card p { font-size: 13.5px; color: var(--text-sub); }

/* ---------------- 资质证书 ---------------- */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.cert-card {
  background: var(--white);
  border: 1px solid var(--silver-light);
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
  transition: transform .3s, box-shadow .3s;
}
.cert-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.cert-card .cert-img {
  border: 1px solid var(--silver-light);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 14px;
  background: var(--silver-bg);
}
.cert-card .cert-img svg { width: 100%; height: auto; display: block; }
.cert-card h3 { font-size: 15px; color: var(--blue-dark); }
.cert-card p { font-size: 12.5px; color: var(--silver-dark); margin-top: 4px; }

/* ---------------- 产品服务 ---------------- */
.prod-tabs {
  position: sticky;
  top: var(--nav-h);
  z-index: 500;
  background: var(--white);
  box-shadow: 0 4px 12px rgba(14,47,82,.06);
}
.prod-tabs .container {
  display: flex;
  gap: 6px;
  overflow-x: auto;
}
.prod-tabs a {
  flex-shrink: 0;
  padding: 16px 22px;
  font-size: 15px;
  color: var(--text-sub);
  border-bottom: 3px solid transparent;
  transition: color .25s, border-color .25s;
}
.prod-tabs a:hover, .prod-tabs a.active {
  color: var(--blue-primary);
  border-bottom-color: var(--blue-primary);
  font-weight: 600;
}
.prod-section { padding: 72px 0 20px; scroll-margin-top: calc(var(--nav-h) + 56px); }
.prod-section:last-of-type { padding-bottom: 72px; }
.prod-detail {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 44px;
  align-items: center;
  margin-bottom: 44px;
}
.prod-detail.reverse .prod-figure { order: 2; }
.prod-figure {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.prod-figure svg { width: 100%; height: auto; display: block; }
.prod-info .cat-tag {
  display: inline-block;
  font-size: 12.5px;
  letter-spacing: 2px;
  color: var(--blue-primary);
  background: var(--blue-light);
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
}
.prod-info h3 { font-size: 24px; color: var(--blue-dark); margin-bottom: 14px; }
.prod-info > p { color: var(--text-sub); margin-bottom: 16px; text-align: justify; }
.prod-feats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 18px; }
.prod-feats li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  color: var(--text-main);
}
.prod-feats li::before {
  content: "";
  position: absolute;
  left: 0; top: 7px;
  width: 9px; height: 9px;
  border-radius: 2px;
  background: var(--blue-primary);
}
.prod-items {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.prod-item-card {
  background: var(--white);
  border: 1px solid var(--silver-light);
  border-radius: var(--radius);
  padding: 20px 18px;
  transition: transform .3s, box-shadow .3s;
}
.prod-item-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: var(--blue-mid); }
.prod-item-card h4 { font-size: 15.5px; color: var(--blue-dark); margin-bottom: 6px; }
.prod-item-card p { font-size: 13px; color: var(--text-sub); }

/* 一站式流程 */
.flow-band { background: var(--silver-bg); padding: 60px 0; }
.flow-steps {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}
.flow-step {
  flex: 1;
  min-width: 150px;
  max-width: 220px;
  text-align: center;
  padding: 0 10px;
  position: relative;
}
.flow-step .num {
  width: 52px; height: 52px;
  margin: 0 auto 12px;
  border-radius: 50%;
  background: var(--blue-primary);
  color: var(--white);
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 6px rgba(27,79,138,.12);
}
.flow-step h4 { font-size: 16px; color: var(--blue-dark); margin-bottom: 6px; }
.flow-step p { font-size: 13px; color: var(--text-sub); }
.flow-step:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -8px; top: 14px;
  color: var(--silver);
  font-size: 20px;
}

/* ---------------- 电子目录 ---------------- */
.cat-intro { max-width: 880px; margin: 0 auto 8px; text-align: center; }
.cat-intro p { font-size: 15px; color: var(--text-sub); margin-bottom: 4px; }
.cat-intro .en { color: var(--silver); font-size: 13px; }
.cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  margin-top: 40px;
}
.cat-card {
  background: var(--white);
  border: 1px solid var(--silver-light);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform .3s, box-shadow .3s, border-color .3s;
  display: flex;
  flex-direction: column;
}
.cat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--blue-mid); }
.cat-fig { height: 160px; background: var(--blue-light); display: flex; align-items: center; justify-content: center; }
.cat-fig svg { width: 100%; height: 100%; display: block; }
.cat-body { padding: 22px 22px 26px; flex: 1; }
.cat-body h3 {
  font-size: 19px;
  color: var(--blue-dark);
  margin-bottom: 12px;
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}
.cat-body h3 .cat-en { font-size: 13px; color: var(--silver-dark); font-weight: 500; letter-spacing: .5px; }
.cat-body p.zh { font-size: 14px; color: var(--text-main); margin-bottom: 8px; text-align: justify; }
.cat-body p.en { font-size: 13px; color: var(--text-sub); margin-bottom: 14px; text-align: justify; }
.cat-spec { margin-top: 6px; border-top: 1px dashed var(--silver-light); padding-top: 12px; }
.cat-spec li {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 8px;
  font-size: 13px;
  padding: 5px 0;
  border-bottom: 1px solid var(--silver-bg);
  align-items: center;
}
.cat-spec li .lbl-zh { color: var(--text-sub); }
.cat-spec li .lbl-en { color: var(--silver); font-size: 11px; letter-spacing: .3px; }
.cat-spec li b { color: var(--blue-primary); font-weight: 600; text-align: right; }
@media (max-width: 992px) { .cat-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .cat-grid { grid-template-columns: 1fr; } }

/* ---------------- 联系我们 ---------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 40px;
  align-items: start;
}
.contact-info-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 34px 30px;
}
.contact-info-card h3 {
  font-size: 20px;
  color: var(--blue-dark);
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--blue-light);
}
.contact-line {
  display: flex;
  gap: 14px;
  margin-bottom: 20px;
}
.contact-line .c-icon {
  width: 44px; height: 44px;
  flex: 0 0 44px;
  border-radius: 10px;
  background: var(--blue-light);
  display: flex;
  align-items: center;
  justify-content: center;
}
.contact-line .c-icon svg { width: 22px; height: 22px; }
.contact-line .c-label { font-size: 13px; color: var(--silver-dark); }
.contact-line .c-value { font-size: 15px; color: var(--text-main); font-weight: 600; word-break: break-all; }

.form-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 34px 30px;
}
.form-card h3 {
  font-size: 20px;
  color: var(--blue-dark);
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--blue-light);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 14px;
  color: var(--text-main);
  margin-bottom: 6px;
  font-weight: 600;
}
.form-group label .req { color: #d64545; }
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--silver-light);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text-main);
  background: var(--white);
  transition: border-color .25s, box-shadow .25s;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--blue-primary);
  box-shadow: 0 0 0 3px rgba(27,79,138,.12);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-msg {
  display: none;
  margin-top: 14px;
  padding: 12px 16px;
  border-radius: 6px;
  font-size: 14px;
}
.form-msg.success { display: block; background: #e6f6ec; color: #1e7a43; border: 1px solid #b7e2c8; }
.form-msg.error { display: block; background: #fdecec; color: #c03030; border: 1px solid #f3c1c1; }

.map-wrap {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.map-wrap iframe {
  width: 100%;
  height: 420px;
  border: none;
  display: block;
}

/* ---------------- 页脚 ---------------- */
.footer {
  background: var(--blue-dark);
  color: rgba(255,255,255,.75);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 36px;
  padding-bottom: 40px;
}
.footer h4 {
  color: var(--white);
  font-size: 16px;
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.footer .f-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer .f-brand svg { width: 38px; height: 38px; }
.footer .f-brand .cn { color: var(--white); font-size: 17px; font-weight: 700; }
.footer p, .footer li { font-size: 14px; line-height: 2; }
.footer a:hover { color: var(--white); text-decoration: underline; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12);
  padding: 18px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,.5);
}
.footer-bottom a { color: inherit; text-decoration: none; }
.footer-bottom a:hover { color: var(--white); text-decoration: underline; }

/* ---------------- 返回顶部 ---------------- */
.back-top {
  position: fixed;
  right: 26px; bottom: 30px;
  width: 46px; height: 46px;
  border-radius: 50%;
  border: none;
  background: var(--blue-primary);
  color: var(--white);
  font-size: 18px;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s, transform .3s;
  box-shadow: var(--shadow);
  z-index: 900;
}
.back-top.show { opacity: 1; pointer-events: auto; }
.back-top:hover { transform: translateY(-4px); }

/* ==========================================================
   响应式适配
   ========================================================== */
@media (max-width: 992px) {
  .biz-grid, .adv-grid, .culture-grid, .team-grid, .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-items { grid-template-columns: repeat(2, 1fr); }
  .news-item { flex: 0 0 50%; }
  .intro-grid, .prod-detail, .contact-grid { grid-template-columns: 1fr; }
  .prod-detail.reverse .prod-figure { order: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    background: var(--white);
    flex-direction: column;
    gap: 0;
    padding: 8px 0 16px;
    box-shadow: 0 12px 24px rgba(14,47,82,.12);
    transform: translateY(-130%);
    transition: transform .35s ease;
    z-index: 999;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { padding: 14px 8%; border-radius: 0; }
  .nav-links a.active::after { display: none; }
  .nav-links a.active { background: var(--blue-light); }

  .hero { height: 480px; }
  .hero-arrow { display: none; }
  .news-item { flex: 0 0 100%; }
  .intro-stats { grid-template-columns: repeat(2, 1fr); }

  .timeline::before { left: 10px; }
  .tl-item { width: 100%; left: 0 !important; text-align: left !important; padding: 0 0 36px 40px; }
  .tl-item::before { left: 3px !important; right: auto !important; }

  .form-row { grid-template-columns: 1fr; }
  .flow-step:not(:last-child)::after { display: none; }
  .flow-step { flex: 0 0 46%; margin-bottom: 26px; }
  .section { padding: 52px 0; }
  .page-hero h1 { font-size: 26px; }
  .section-head h2 { font-size: 24px; }
}

@media (max-width: 480px) {
  .biz-grid, .adv-grid, .culture-grid, .team-grid, .cert-grid, .prod-items { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .brand-text .brand-en { display: none; }
}