/* ============================================================
   示例集团 · 商务专业风格站点样式
   主色：深藏青 #16263f / 点缀金 #c19a5b
   ============================================================ */

:root {
  --navy: #ffffff;
  --navy-deep: #0a0f0c;
  --navy-soft: #101a14;
  --gold: #23ac3d;
  --gold-light: #4fbe63;
  --bg: #0a0f0c;
  --bg-card: #121915;
  --text: #e8ebe9;
  --text-light: rgba(232,235,233,.62);
  --line: rgba(255,255,255,.12);
  --serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: auto;
  overflow-anchor: none;
}

body {
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: min(1160px, 92%);
  margin: 0 auto;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background .35s ease, box-shadow .35s ease;
  background: rgba(10, 15, 12, .88);
  box-shadow: 0 1px 14px rgba(0,0,0,.3);
  backdrop-filter: blur(10px);
}
.site-header.scrolled {
  background: rgba(8, 12, 10, .96);
  box-shadow: 0 2px 18px rgba(0,0,0,.4);
  backdrop-filter: blur(10px);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
}
.logo-img {
  height: 96px;
  width: auto;
  display: block;
  margin: 0;
}
.logo-text { font-family: var(--serif); font-size: 24px; letter-spacing: 6px; color: #fff; font-weight: 700; line-height: 1; padding-top: 2px; }

/* 语言切换按钮 · 胶囊分段样式 */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 999px;
  padding: 3px;
  cursor: pointer;
  font-family: var(--sans);
  transition: border-color .25s ease, background .25s ease;
}
.lang-toggle:hover {
  border-color: rgba(35,172,61,.6);
  background: rgba(255,255,255,.1);
}
.lang-toggle [data-lang] {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 12.5px;
  letter-spacing: 1px;
  line-height: 1;
  color: rgba(255,255,255,.55);
  transition: color .25s ease, background .25s ease;
}
.lang-toggle [data-lang].active {
  background: var(--gold);
  color: #07130b;
  font-weight: 600;
}
.nav-links .lang-item { list-style: none; margin-left: 8px; }
.nav-links {
  display: flex;
  gap: 38px;
  list-style: none;
}
.nav-links a {
  color: rgba(255,255,255,.85);
  font-size: 15px;
  letter-spacing: 1px;
  padding: 6px 0;
  position: relative;
  transition: color .25s;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--gold);
  transition: width .3s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--gold-light); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-toggle {
  display: none;
  background: none; border: none;
  width: 40px; height: 40px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: #fff;
  margin: 5px auto;
  transition: .3s;
}

/* ---------- 首页 Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(115deg, rgba(8,12,10,.93) 0%, rgba(8,12,10,.80) 55%, rgba(8,12,10,.55) 100%),
    url("https://images.unsplash.com/photo-1451187580459-43490279c0fa?auto=format&fit=crop&w=1800&q=70") center/cover no-repeat;
  color: #fff;
  padding: 140px 0 80px;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 54px 54px;
  -webkit-mask-image: radial-gradient(1200px 700px at 72% 30%, #000 25%, transparent 78%);
  mask-image: radial-gradient(1200px 700px at 72% 30%, #000 25%, transparent 78%);
}
.hero::after {
  content: "";
  position: absolute;
  right: -170px;
  top: 6%;
  width: 580px;
  height: 580px;
  border-radius: 50%;
  border: 1px solid rgba(35,172,61,.16);
  pointer-events: none;
}
.hero h1 em { color: var(--gold-light); font-style: normal; }
.hero .container { position: relative; z-index: 1; }
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--gold-light);
  letter-spacing: 4px;
  font-size: 14px;
  margin-bottom: 26px;
}
.hero-tag::before {
  content: "";
  width: 46px; height: 1px;
  background: var(--gold);
}
.hero h1 {
  font-family: var(--serif);
  font-size: clamp(34px, 5.2vw, 58px);
  line-height: 1.3;
  letter-spacing: 3px;
  max-width: 720px;
}
.hero p {
  margin: 26px 0 42px;
  max-width: 560px;
  color: rgba(255,255,255,.78);
  font-size: 17px;
}
.btn {
  display: inline-block;
  padding: 14px 42px;
  font-size: 15px;
  letter-spacing: 3px;
  transition: all .3s ease;
  border: 1px solid transparent;
}
.btn-gold {
  background: var(--gold);
  color: var(--navy-deep);
  font-weight: 600;
}
.btn-gold:hover { background: var(--gold-light); transform: translateY(-2px); }
.btn-ghost {
  border-color: rgba(255,255,255,.5);
  color: #fff;
  margin-left: 16px;
}
.btn-ghost:hover { border-color: var(--gold); color: var(--gold-light); }

/* ---------- 通用区块 ---------- */
.section { padding: 96px 0; }
.section-dark { background: #060a07; color: #fff; }
.section-head { text-align: center; margin-bottom: 60px; }
.section-head .en {
  color: var(--gold);
  letter-spacing: 5px;
  font-size: 13px;
  text-transform: uppercase;
}
.section-head h2 {
  font-family: var(--serif);
  font-size: clamp(26px, 3.4vw, 38px);
  letter-spacing: 4px;
  margin-top: 10px;
  color: var(--navy);
}
.section-dark .section-head h2 { color: #fff; }
.section-head .divider {
  width: 54px; height: 3px;
  background: var(--gold);
  margin: 18px auto 0;
}

/* 首页 · 关于我们摘要 */
.about-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 64px;
  align-items: center;
}
.about-text h3 {
  font-family: var(--serif);
  font-size: 30px;
  color: var(--navy);
  letter-spacing: 2px;
  margin-bottom: 22px;
  line-height: 1.5;
}
.about-text h3 em { color: var(--gold); font-style: normal; }
.about-text p { color: var(--text-light); margin-bottom: 16px; }
.about-img {
  position: relative;
}
.about-img img { box-shadow: 18px 18px 0 rgba(193,154,91,.25); }
.about-img .years {
  position: absolute;
  left: -28px; bottom: -28px;
  background: #050807;
  color: #fff;
  padding: 26px 32px;
  text-align: center;
  border: 1px solid rgba(255,255,255,.12);
}
.about-img .years b {
  font-family: var(--serif);
  font-size: 40px;
  color: var(--gold);
  display: block;
  line-height: 1.1;
}
.about-img .years span { font-size: 13px; letter-spacing: 2px; color: rgba(255,255,255,.75); }
.link-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--navy);
  font-weight: 600;
  letter-spacing: 2px;
  margin-top: 10px;
  border-bottom: 2px solid var(--gold);
  padding-bottom: 4px;
  transition: color .25s;
}
.link-more:hover { color: var(--gold); }

/* 首页 · 数据带 */
.stats-band {
  background: linear-gradient(120deg, var(--navy-deep), var(--navy-soft));
  color: #fff;
  padding: 70px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}
.stat b {
  font-family: var(--serif);
  font-size: 30px;
  color: var(--gold);
  line-height: 1.2;
}
.stat b small { font-size: 16px; }
.stat span { display: block; margin-top: 6px; color: rgba(255,255,255,.7); letter-spacing: 2px; font-size: 14px; }

/* 业务 / 服务卡片 */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  padding: 44px 34px;
  position: relative;
  transition: all .35s ease;
}
.service-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s ease;
}
.service-card:hover { transform: translateY(-8px); box-shadow: 0 18px 40px rgba(22,38,63,.12); }
.service-card:hover::before { transform: scaleX(1); }
.service-card .icon {
  width: 56px; height: 56px;
  border: 1px solid var(--gold);
  color: var(--gold);
  display: grid;
  place-items: center;
  font-size: 26px;
  margin-bottom: 24px;
}
.service-card h3 {
  font-family: var(--serif);
  color: var(--navy);
  font-size: 21px;
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.service-card p { color: var(--text-light); font-size: 15px; }

/* 案例卡片 */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.cases-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.case-card {
  background: var(--bg-card);
  overflow: hidden;
  border: 1px solid var(--line);
  transition: all .35s ease;
  display: flex;
  flex-direction: column;
}
.case-card:hover { transform: translateY(-8px); box-shadow: 0 18px 44px rgba(22,38,63,.14); }
.case-thumb {
  height: 220px;
  overflow: hidden;
  position: relative;
}
.case-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .6s ease;
}
.case-card:hover .case-thumb img { transform: scale(1.06); }
.case-thumb .tag {
  position: absolute;
  top: 18px; left: 18px;
  background: rgba(14,26,45,.88);
  color: var(--gold-light);
  font-size: 14px;
  letter-spacing: 2px;
  padding: 7px 18px;
  font-weight: 600;
}
.case-body { padding: 28px 26px 30px; flex: 1; display: flex; flex-direction: column; }
.case-body h3 {
  font-family: var(--serif);
  color: var(--navy);
  font-size: 19px;
  letter-spacing: 1px;
  margin-bottom: 10px;
}
.case-body p { color: var(--text-light); font-size: 14.5px; flex: 1; }
.case-meta {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  color: var(--text-light);
  font-size: 13px;
  letter-spacing: 1px;
}

/* CTA 带 */
.cta-band {
  background:
    linear-gradient(rgba(8,12,10,.92), rgba(8,12,10,.92)),
    url("https://images.unsplash.com/photo-1466611653911-95081537e5b7?auto=format&fit=crop&w=1600&q=70") center/cover fixed;
  color: #fff;
  text-align: center;
  padding: 100px 0;
}
.cta-band h2 {
  font-family: var(--serif);
  font-size: clamp(26px, 3.4vw, 36px);
  letter-spacing: 4px;
  margin-bottom: 18px;
}
.cta-band p { color: rgba(255,255,255,.72); margin-bottom: 36px; }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--navy-deep);
  color: rgba(255,255,255,.62);
  padding: 64px 0 0;
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 44px;
  padding-bottom: 48px;
}
.footer-grid h4 {
  color: #fff;
  font-size: 15px;
  letter-spacing: 3px;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 12px;
}
.footer-grid h4::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 28px; height: 2px;
  background: var(--gold);
}
.footer-grid ul { list-style: none; }
.footer-grid li { margin-bottom: 10px; }
.footer-grid a:hover { color: var(--gold-light); }
.footer-brand .logo { margin-bottom: 18px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,.4);
}
.footer-bottom a { color: rgba(255,255,255,.55); text-decoration: none; }
.footer-bottom a:hover { color: #fff; text-decoration: underline; }

/* ---------- 内页 Banner ---------- */
.page-banner {
  background:
    linear-gradient(rgba(8,12,10,.88), rgba(8,12,10,.88)),
    url("https://images.unsplash.com/photo-1451187580459-43490279c0fa?auto=format&fit=crop&w=1800&q=70") center/cover;
  color: #fff;
  padding: 180px 0 90px;
  text-align: center;
}
.page-banner h1 {
  font-family: var(--serif);
  font-size: clamp(30px, 4vw, 44px);
  letter-spacing: 6px;
}
.page-banner .en {
  color: var(--gold-light);
  letter-spacing: 5px;
  font-size: 14px;
  text-transform: uppercase;
  margin-top: 12px;
}
.breadcrumb {
  margin-top: 22px;
  font-size: 13px;
  color: rgba(255,255,255,.6);
  letter-spacing: 1px;
}
.breadcrumb a:hover { color: var(--gold-light); }

/* ---------- 关于页 ---------- */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.intro-grid .text h3 {
  font-family: var(--serif);
  color: var(--navy);
  font-size: 28px;
  letter-spacing: 2px;
  margin-bottom: 20px;
}
.intro-grid .text p { color: var(--text-light); margin-bottom: 14px; }

.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
}
.value-card {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.1);
  padding: 36px 26px;
  text-align: center;
  transition: all .3s ease;
}
.value-card:hover { border-color: var(--gold); transform: translateY(-6px); }
.value-card .num {
  font-family: var(--serif);
  color: var(--gold);
  font-size: 20px;
  letter-spacing: 2px;
}
.value-card h3 {
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 4px;
  margin: 12px 0 10px;
}
.value-card p { color: rgba(255,255,255,.6); font-size: 13.5px; }

/* 发展历程时间轴 */
.timeline { position: relative; max-width: 820px; margin: 0 auto; }
.timeline::before {
  content: "";
  position: absolute;
  left: 50%; top: 0; bottom: 0;
  width: 2px;
  background: var(--line);
  transform: translateX(-50%);
}
.tl-item {
  display: flex;
  justify-content: flex-end;
  width: 50%;
  padding: 0 46px 52px 0;
  position: relative;
}
.tl-item:nth-child(even) {
  margin-left: 50%;
  justify-content: flex-start;
  padding: 0 0 52px 46px;
}
.tl-item::before {
  content: "";
  position: absolute;
  top: 8px;
  right: -7px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(193,154,91,.25);
}
.tl-item:nth-child(even)::before { right: auto; left: -7px; }
.tl-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  padding: 26px 30px;
}
.tl-card .year {
  font-family: var(--serif);
  color: var(--gold);
  font-size: 24px;
}
.tl-card h3 {
  color: var(--navy);
  font-size: 17px;
  margin: 6px 0 8px;
  letter-spacing: 1px;
}
.tl-card p { color: var(--text-light); font-size: 14px; }

/* ---------- 案例页筛选 ---------- */
.case-filter {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}
.case-filter button {
  background: none;
  border: 1px solid var(--line);
  padding: 10px 28px;
  font-size: 14px;
  letter-spacing: 2px;
  color: var(--text-light);
  cursor: pointer;
  transition: all .3s;
  font-family: var(--sans);
}
.case-filter button:hover { border-color: var(--gold); color: var(--gold); }
.case-filter button.active {
  background: var(--gold);
  border-color: var(--gold);
  color: #050807;
}

/* ---------- 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 60px;
}
.contact-info h3 {
  font-family: var(--serif);
  color: var(--navy);
  font-size: 26px;
  letter-spacing: 2px;
  margin-bottom: 14px;
}
.contact-info > p { color: var(--text-light); margin-bottom: 34px; }
.info-item {
  display: flex;
  gap: 18px;
  margin-bottom: 26px;
}
.info-item .ic {
  width: 48px; height: 48px;
  flex-shrink: 0;
  border: 1px solid var(--gold);
  color: var(--gold);
  display: grid;
  place-items: center;
  font-size: 20px;
}
.info-item h4 { color: var(--navy); font-size: 16px; letter-spacing: 1px; }
.info-item p { color: var(--text-light); font-size: 14px; }
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--line);
  padding: 44px 40px;
}
.contact-form h3 {
  font-family: var(--serif);
  color: var(--navy);
  font-size: 22px;
  letter-spacing: 2px;
  margin-bottom: 28px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 13px;
  color: var(--text-light);
  letter-spacing: 1px;
  margin-bottom: 8px;
}
.form-group input,
.form-group textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--bg);
  padding: 12px 14px;
  font-size: 14px;
  font-family: var(--sans);
  color: var(--text);
  transition: border-color .25s;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--gold);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-submit {
  width: 100%;
  border: none;
  cursor: pointer;
  font-family: var(--sans);
}
.form-tip {
  margin-top: 14px;
  font-size: 12.5px;
  color: var(--text-light);
  text-align: center;
}

/* ---------- 业绩列表 ---------- */
.perf-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
}
.perf-col {
  background: var(--bg-card);
  border: 1px solid var(--line);
  padding: 30px 28px;
}
.perf-col h3 {
  font-family: var(--serif);
  color: var(--navy);
  font-size: 19px;
  letter-spacing: 2px;
  padding-bottom: 14px;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--gold);
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.perf-col h3 span {
  font-family: var(--sans);
  font-size: 12px;
  color: var(--gold);
  letter-spacing: 1px;
}
.perf-col ul { list-style: none; }
.perf-col li {
  font-size: 13.5px;
  color: var(--text-light);
  padding: 8px 0 8px 16px;
  border-bottom: 1px dashed var(--line);
  position: relative;
  line-height: 1.6;
}
.perf-col li:last-child { border-bottom: none; }
.perf-col li::before {
  content: "";
  position: absolute;
  left: 0; top: 16px;
  width: 6px; height: 6px;
  background: var(--gold);
}

/* ---------- 荣誉资质 ---------- */
.honor-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.honor-col {
  background: var(--bg-card);
  border: 1px solid var(--line);
  padding: 40px 38px;
}
.honor-col h3 {
  font-family: var(--serif);
  color: var(--navy);
  font-size: 21px;
  letter-spacing: 3px;
  margin-bottom: 26px;
  position: relative;
  padding-bottom: 14px;
}
.honor-col h3::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 34px; height: 2px;
  background: var(--gold);
}
.honor-list { list-style: none; }
.honor-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
  color: var(--text-light);
  font-size: 14.5px;
}
.honor-list li:last-child { border-bottom: none; }
.honor-list li::before {
  content: "";
  width: 7px; height: 7px;
  background: var(--gold);
  margin-top: 8px;
  flex-shrink: 0;
}
.honor-list li b { color: var(--navy); font-weight: 600; margin-right: 4px; flex-shrink: 0; }

/* ---------- 行业业绩 ---------- */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
}
.industry-col {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.1);
  padding: 34px 28px;
  transition: all .3s ease;
}
.industry-col:hover { border-color: var(--gold); transform: translateY(-6px); }
.industry-col .ic {
  width: 50px; height: 50px;
  border: 1px solid var(--gold);
  color: var(--gold);
  display: grid;
  place-items: center;
  font-size: 22px;
  margin-bottom: 20px;
}
.industry-col h3 {
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 4px;
  margin-bottom: 8px;
  color: #fff;
}
.industry-col .count {
  font-size: 13px;
  color: var(--gold-light);
  letter-spacing: 2px;
  margin-bottom: 18px;
}
.industry-col ul { list-style: none; }
.industry-col li {
  color: rgba(255,255,255,.68);
  font-size: 13.5px;
  padding: 8px 0 8px 14px;
  position: relative;
  border-top: 1px dashed rgba(255,255,255,.1);
  line-height: 1.6;
}
.industry-col li:first-child { border-top: none; }
.industry-col li::before {
  content: "";
  position: absolute;
  left: 0; top: 16px;
  width: 5px; height: 5px;
  background: var(--gold);
}

/* ---------- 单页案例详解 ---------- */
.case-detail {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  padding: 40px 42px;
  margin-bottom: 28px;
}
.case-detail h3 {
  font-family: var(--serif);
  font-size: 22px;
  color: #fff;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 18px;
}
.case-detail p {
  color: var(--text-light);
  font-size: 15px;
  margin-bottom: 10px;
  line-height: 1.8;
}
.case-detail p strong {
  color: #fff;
  font-weight: 700;
  margin-right: 8px;
}

/* ---------- 锚点与标题统一 ---------- */
section { scroll-margin-top: 84px; }
.section-head h2,
.about-text h3,
.service-card h3,
.case-body h3,
.tl-card h3,
.honor-col h3,
.contact-form h3,
.contact-info h3,
.info-item h4 {
  font-weight: 700;
}

/* ---------- 动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity .8s ease, transform .8s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
/* ---------- 公众号二维码 ---------- */
.footer-wechat {
  margin-top: 18px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.footer-wechat img {
  width: 78px;
  height: 78px;
  background: #fff;
  padding: 4px;
  border-radius: 4px;
}
.footer-wechat span {
  font-size: 13px;
  color: rgba(255,255,255,.55);
  letter-spacing: 2px;
}
.contact-wechat {
  margin-top: 28px;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 18px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
}
.contact-wechat img {
  width: 96px;
  height: 96px;
  flex-shrink: 0;
}
.contact-wechat-text h4 {
  font-size: 15px;
  margin-bottom: 4px;
}
.contact-wechat-text p {
  color: var(--text-light);
  font-size: 13px;
}
.contact-map h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: 1px;
}
.contact-map iframe.map-frame {
  display: block;
  width: 100%;
  height: 460px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #0d1410;
}
.map-addr { margin-top: 16px; font-size: 15px; line-height: 1.8; color: var(--text); }
.map-fallback { margin-top: 8px; font-size: 13px; }
.map-fallback a { color: var(--gold); text-decoration: none; }
.map-fallback a:hover { color: var(--gold-light); text-decoration: underline; }

/* ---------- 首页固定背景（第一屏以下滚动时背景不动） ---------- */
body.page-home { background: transparent; }
body.page-home::before {
  content: "";
  position: fixed;
  inset: -8px;
  z-index: -1;
  background:
    linear-gradient(rgba(8,12,10,.82), rgba(8,12,10,.82)),
    url("../images/city-night.jpg") center/cover no-repeat;
  filter: blur(6px);
}
body.page-home .section { background: transparent; }
body.page-home .section-dark { background: rgba(6,10,7,.58); }
body.page-home .stats-band { background: rgba(6,10,7,.52); }
body.page-home .site-footer { background: rgba(5,9,7,.9); }

@media (max-width: 960px) {
  .about-grid, .intro-grid, .contact-grid { grid-template-columns: 1fr; gap: 44px; }
  .services-grid, .cases-grid, .cases-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
  .stats-grid, .values-grid, .perf-grid, .industry-grid { grid-template-columns: repeat(2, 1fr); gap: 40px; }
  .honor-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .about-img .years { left: 0; }
}
@media (max-width: 640px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed;
    top: 72px; right: 0;
    flex-direction: column;
    background: rgba(8,12,10,.98);
    width: min(280px, 78vw);
    padding: 30px 34px 40px;
    gap: 22px;
    transform: translateX(100%);
    transition: transform .35s ease;
    height: calc(100vh - 72px);
  }
  .nav-links.open { transform: none; }
  .services-grid, .cases-grid, .cases-grid.cols-2 { grid-template-columns: 1fr; }
  .perf-grid, .industry-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .timeline::before { left: 8px; }
  .tl-item, .tl-item:nth-child(even) {
    width: 100%;
    margin-left: 0;
    justify-content: flex-start;
    padding: 0 0 40px 34px;
  }
  .tl-item::before, .tl-item:nth-child(even)::before { left: 2px; right: auto; }
  .btn-ghost { margin-left: 0; margin-top: 14px; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
}