/* ============================================================
   潍坊桥德网络科技有限公司 - 企业网站样式
   主色调：深蓝 #1a3a6e  强调色：橙色 #f5821f
   ============================================================ */

/* ---------- CSS 变量 ---------- */
:root {
  --color-primary:   #1a3a6e;
  --color-primary-dark: #122d56;
  --color-accent:    #f5821f;
  --color-accent-dark: #d96e10;
  --color-text:      #2c3e50;
  --color-text-light:#6b7a8d;
  --color-bg:        #f8f9fb;
  --color-white:     #ffffff;
  --color-border:    #e0e6ef;
  --shadow-sm: 0 2px 8px rgba(26,58,110,.08);
  --shadow-md: 0 6px 24px rgba(26,58,110,.13);
  --shadow-lg: 0 12px 40px rgba(26,58,110,.18);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: .3s ease;
  --font-main: 'PingFang SC','Microsoft YaHei','Segoe UI',sans-serif;
  --max-width: 1200px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; border: none; outline: none; }

/* ---------- 通用工具 ---------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: 12px;
}
.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-light);
  text-align: center;
  max-width: 560px;
  margin: 0 auto 56px;
}
.section-tag {
  display: inline-block;
  background: rgba(245,130,31,.12);
  color: var(--color-accent);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: 30px;
  margin-bottom: 14px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 32px;
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-weight: 600;
  transition: var(--transition);
}
.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
}
.btn-primary:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245,130,31,.35);
}
.btn-outline {
  background: transparent;
  border: 2px solid var(--color-white);
  color: var(--color-white);
}
.btn-outline:hover {
  background: var(--color-white);
  color: var(--color-primary);
  transform: translateY(-2px);
}
.btn-outline-dark {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}
.btn-outline-dark:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* ============================================================
   导航栏
   ============================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition);
}
.navbar.scrolled {
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
}
.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.navbar__logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.navbar__logo-icon {
  width: 38px; height: 38px;
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: 1.2rem;
  font-weight: 800;
  flex-shrink: 0;
}
.navbar__logo-text {
  font-size: .95rem;
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.2;
  transition: color var(--transition);
}
.navbar.scrolled .navbar__logo-text { color: var(--color-primary); }
.navbar__nav { display: flex; align-items: center; gap: 6px; }
.navbar__link {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: .92rem;
  font-weight: 500;
  color: rgba(255,255,255,.9);
  transition: var(--transition);
}
.navbar__link:hover, .navbar__link.active {
  color: var(--color-white);
  background: rgba(255,255,255,.18);
}
.navbar.scrolled .navbar__link { color: var(--color-text); }
.navbar.scrolled .navbar__link:hover,
.navbar.scrolled .navbar__link.active {
  color: var(--color-primary);
  background: rgba(26,58,110,.08);
}
.navbar__cta {
  background: var(--color-accent);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
}
.navbar__cta:hover {
  background: var(--color-accent-dark) !important;
  color: #fff !important;
}
.navbar.scrolled .navbar__cta { background: var(--color-accent); color: #fff !important; }

/* 汉堡菜单 */
.navbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  padding: 6px;
}
.navbar__hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: var(--transition);
}
.navbar.scrolled .navbar__hamburger span { background: var(--color-primary); }
.navbar__hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.navbar__hamburger.open span:nth-child(2) { opacity: 0; }
.navbar__hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端菜单 */
.navbar__mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--color-white);
  padding: 16px 24px;
  border-top: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}
.navbar__mobile-menu.open { display: flex; }
.navbar__mobile-menu .navbar__link {
  color: var(--color-text);
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}
.navbar__mobile-menu .navbar__link:last-child { border-bottom: none; }
.navbar__mobile-menu .navbar__link:hover { color: var(--color-primary); background: none; }
.navbar__mobile-menu .navbar__cta {
  margin-top: 8px;
  text-align: center;
  background: var(--color-accent);
  color: #fff !important;
  border-radius: var(--radius-sm);
}

/* ============================================================
   英雄区 (Hero)
   ============================================================ */
.hero {
  min-height: 100vh;
  background: linear-gradient(135deg, var(--color-primary) 0%, #2356a8 60%, #1a3a6e 100%);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero::after {
  content: '';
  position: absolute;
  top: -30%; right: -10%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(245,130,31,.18) 0%, transparent 70%);
  border-radius: 50%;
}
.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(245,130,31,.2);
  border: 1px solid rgba(245,130,31,.4);
  color: #ffb066;
  font-size: .82rem;
  font-weight: 600;
  padding: 5px 16px;
  border-radius: 30px;
  margin-bottom: 20px;
}
.hero__badge::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
}
.hero__title {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.25;
  margin-bottom: 20px;
}
.hero__title span { color: var(--color-accent); }
.hero__desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,.8);
  margin-bottom: 36px;
  max-width: 480px;
}
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero__stats {
  display: flex;
  gap: 32px;
  margin-top: 48px;
}
.hero__stat { text-align: center; }
.hero__stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-white);
}
.hero__stat-num span { color: var(--color-accent); }
.hero__stat-label {
  font-size: .82rem;
  color: rgba(255,255,255,.65);
  margin-top: 2px;
}
/* 右侧装饰卡片 */
.hero__visual {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.hero__card {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
}
.hero__card:hover {
  background: rgba(255,255,255,.14);
  transform: translateX(6px);
}
.hero__card-icon {
  width: 48px; height: 48px;
  background: rgba(245,130,31,.25);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.hero__card-title {
  font-size: .95rem;
  font-weight: 600;
  color: var(--color-white);
}
.hero__card-desc {
  font-size: .8rem;
  color: rgba(255,255,255,.6);
}

/* ============================================================
   服务区 (Services)
   ============================================================ */
.services {
  padding: 96px 0;
  background: var(--color-bg);
}
.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 28px;
}
.service-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  border: 1px solid var(--color-border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}
.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.service-card:hover::before { transform: scaleX(1); }
.service-card__icon {
  width: 60px; height: 60px;
  background: linear-gradient(135deg, rgba(26,58,110,.1), rgba(26,58,110,.04));
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 20px;
  transition: var(--transition);
}
.service-card:hover .service-card__icon {
  background: linear-gradient(135deg, var(--color-primary), #2356a8);
}
.service-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}
.service-card__desc {
  font-size: .9rem;
  color: var(--color-text-light);
  line-height: 1.7;
}
.service-card__features {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.service-card__feature {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .84rem;
  color: var(--color-text-light);
}
.service-card__feature::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ============================================================
   优势区 (Advantages)
   ============================================================ */
.advantages {
  padding: 96px 0;
  background: var(--color-white);
}
.advantages__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 28px;
}
.advantage-item {
  text-align: center;
  padding: 36px 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.advantage-item:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.advantage-item:hover .advantage-item__title,
.advantage-item:hover .advantage-item__desc { color: var(--color-white); }
.advantage-item:hover .advantage-item__icon-wrap {
  background: rgba(245,130,31,.2);
}
.advantage-item__icon-wrap {
  width: 72px; height: 72px;
  background: rgba(26,58,110,.07);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
  font-size: 2rem;
  transition: var(--transition);
}
.advantage-item__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
  transition: var(--transition);
}
.advantage-item__desc {
  font-size: .88rem;
  color: var(--color-text-light);
  transition: var(--transition);
}

/* ============================================================
   客户案例 (Cases)
   ============================================================ */
.cases {
  padding: 96px 0;
  background: var(--color-bg);
}
.cases__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}
.case-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.case-card__header {
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}
.case-card__body { padding: 24px; }
.case-card__industry {
  font-size: .78rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 8px;
}
.case-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}
.case-card__desc {
  font-size: .88rem;
  color: var(--color-text-light);
  line-height: 1.65;
}
.case-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.case-card__tag {
  font-size: .76rem;
  background: rgba(26,58,110,.07);
  color: var(--color-primary);
  padding: 3px 10px;
  border-radius: 30px;
}

/* ============================================================
   CTA Banner
   ============================================================ */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, #2356a8 100%);
  padding: 80px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.cta-banner__content { position: relative; z-index: 1; }
.cta-banner__title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 14px;
}
.cta-banner__desc {
  font-size: 1rem;
  color: rgba(255,255,255,.75);
  margin-bottom: 36px;
}
.cta-banner__actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ============================================================
   页脚 (Footer)
   ============================================================ */
.footer {
  background: #0d1f3c;
  color: rgba(255,255,255,.7);
  padding: 64px 0 0;
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer__brand .navbar__logo-text { color: var(--color-white); font-size: 1rem; }
.footer__brand-desc {
  font-size: .88rem;
  margin-top: 14px;
  line-height: 1.8;
  color: rgba(255,255,255,.55);
}
.footer__col-title {
  font-size: .92rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 18px;
}
.footer__links { display: flex; flex-direction: column; gap: 10px; }
.footer__links a {
  font-size: .88rem;
  color: rgba(255,255,255,.55);
  transition: var(--transition);
}
.footer__links a:hover { color: var(--color-accent); }
.footer__contact { display: flex; flex-direction: column; gap: 12px; }
.footer__contact-item {
  display: flex;
  gap: 10px;
  font-size: .88rem;
  color: rgba(255,255,255,.55);
  align-items: flex-start;
}
.footer__contact-item strong {
  color: rgba(255,255,255,.75);
  flex-shrink: 0;
}
.footer__bottom {
  text-align: center;
  padding: 20px 0;
  font-size: .82rem;
  color: rgba(255,255,255,.35);
}
.footer__bottom a { color: rgba(255,255,255,.5); }
.footer__bottom a:hover { color: var(--color-accent); }

/* ============================================================
   关于我们页面
   ============================================================ */
.page-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, #2356a8 100%);
  padding: 140px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.page-hero__content { position: relative; z-index: 1; }
.page-hero__title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 14px;
}
.page-hero__desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,.75);
  max-width: 560px;
  margin: 0 auto;
}

/* 公司简介 */
.about-intro {
  padding: 96px 0;
  background: var(--color-white);
}
.about-intro__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.about-intro__visual {
  background: linear-gradient(135deg, rgba(26,58,110,.06), rgba(245,130,31,.06));
  border-radius: var(--radius-lg);
  height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 6rem;
  border: 1px solid var(--color-border);
}
.about-intro__text .section-tag { text-align: left; display: inline-block; }
.about-intro__title {
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
  line-height: 1.4;
}
.about-intro__desc {
  color: var(--color-text-light);
  line-height: 1.85;
  margin-bottom: 28px;
}
.about-intro__stats {
  display: flex;
  gap: 32px;
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}
.about-intro__stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-primary);
}
.about-intro__stat-num span { color: var(--color-accent); }
.about-intro__stat-label {
  font-size: .8rem;
  color: var(--color-text-light);
}

/* 发展历程 */
.timeline {
  padding: 96px 0;
  background: var(--color-bg);
}
.timeline__list {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}
.timeline__list::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-accent));
  transform: translateX(-50%);
}
.timeline__item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
  position: relative;
}
.timeline__item::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 20px;
  width: 14px; height: 14px;
  background: var(--color-accent);
  border: 3px solid var(--color-white);
  border-radius: 50%;
  transform: translateX(-50%);
  box-shadow: 0 0 0 3px rgba(245,130,31,.25);
}
.timeline__item:nth-child(odd) .timeline__content { grid-column: 1; text-align: right; padding-right: 32px; }
.timeline__item:nth-child(odd) .timeline__year { grid-column: 2; padding-left: 32px; }
.timeline__item:nth-child(even) .timeline__year { grid-column: 1; text-align: right; padding-right: 32px; }
.timeline__item:nth-child(even) .timeline__content { grid-column: 2; padding-left: 32px; }
.timeline__year {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  display: flex;
  align-items: flex-start;
  padding-top: 4px;
}
.timeline__content-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}
.timeline__content-desc {
  font-size: .88rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* 团队介绍 */
.team {
  padding: 96px 0;
  background: var(--color-white);
}
.team__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 28px;
}
.team-card {
  text-align: center;
  padding: 36px 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.team-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-6px);
  border-color: var(--color-primary);
}
.team-card__avatar {
  width: 80px; height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #2356a8);
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem;
  margin: 0 auto 16px;
  color: var(--color-white);
  font-weight: 700;
}
.team-card__name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}
.team-card__role {
  font-size: .82rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 10px;
}
.team-card__desc {
  font-size: .84rem;
  color: var(--color-text-light);
  line-height: 1.65;
}

/* 企业文化 */
.culture {
  padding: 96px 0;
  background: var(--color-bg);
}
.culture__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}
.culture-item {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.culture-item:hover {
  background: linear-gradient(135deg, var(--color-primary), #2356a8);
  border-color: transparent;
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.culture-item:hover .culture-item__title,
.culture-item:hover .culture-item__desc { color: var(--color-white); }
.culture-item__icon { font-size: 2.4rem; margin-bottom: 16px; }
.culture-item__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
  transition: var(--transition);
}
.culture-item__desc {
  font-size: .85rem;
  color: var(--color-text-light);
  transition: var(--transition);
}

/* ============================================================
   联系我们页面
   ============================================================ */
.contact {
  padding: 96px 0;
  background: var(--color-white);
}
.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 48px;
  align-items: start;
}
.contact__info { display: flex; flex-direction: column; gap: 20px; }
.contact__info-card {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.contact__info-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}
.contact__info-icon {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--color-primary), #2356a8);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.contact__info-label {
  font-size: .78rem;
  font-weight: 600;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: 4px;
}
.contact__info-value {
  font-size: .95rem;
  font-weight: 600;
  color: var(--color-primary);
}

/* 地图占位 */
.map-placeholder {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, rgba(26,58,110,.06), rgba(245,130,31,.06));
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 10px;
  color: var(--color-text-light);
  font-size: .9rem;
}
.map-placeholder__icon { font-size: 2.4rem; }

/* 联系表单 */
.contact__form-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid var(--color-border);
}
.contact__form-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}
.contact__form-sub {
  font-size: .88rem;
  color: var(--color-text-light);
  margin-bottom: 28px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 18px; }
.form-group label {
  font-size: .85rem;
  font-weight: 600;
  color: var(--color-text);
}
.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: .92rem;
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-white);
  transition: var(--transition);
  width: 100%;
  resize: vertical;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26,58,110,.1);
}
.form-group textarea { min-height: 120px; }
.form__submit {
  width: 100%;
  padding: 14px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}
.form__submit:hover {
  background: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245,130,31,.35);
}

/* 成功消息 */
.form__success {
  display: none;
  background: #e8f5e9;
  border: 1px solid #a5d6a7;
  color: #2e7d32;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: .9rem;
  margin-top: 16px;
  text-align: center;
}
.form__success.show { display: block; }

/* ============================================================
   通用动画
   ============================================================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .navbar__nav { display: none; }
  .navbar__hamburger { display: flex; }

  .hero__inner { grid-template-columns: 1fr; text-align: center; }
  .hero__desc { max-width: 100%; }
  .hero__actions { justify-content: center; }
  .hero__stats { justify-content: center; }
  .hero__visual { display: none; }

  .about-intro__inner { grid-template-columns: 1fr; }
  .about-intro__visual { height: 200px; font-size: 4rem; }
  .about-intro__stats { gap: 20px; }

  .timeline__list::before { left: 20px; }
  .timeline__item { grid-template-columns: 1fr; padding-left: 50px; }
  .timeline__item::after { left: 20px; top: 14px; }
  .timeline__item:nth-child(odd) .timeline__content { grid-column: 1; text-align: left; padding-right: 0; }
  .timeline__item:nth-child(odd) .timeline__year { grid-column: 1; padding-left: 0; order: -1; }
  .timeline__item:nth-child(even) .timeline__year { grid-column: 1; text-align: left; padding-right: 0; order: -1; }
  .timeline__item:nth-child(even) .timeline__content { grid-column: 1; padding-left: 0; }

  .contact__inner { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .contact__form-card { padding: 24px; }

  .footer__grid { grid-template-columns: 1fr; gap: 28px; }
  .cta-banner__actions { flex-direction: column; align-items: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .services__grid, .advantages__grid, .cases__grid,
  .team__grid, .culture__grid { grid-template-columns: 1fr; }
  .hero__stats { flex-wrap: wrap; gap: 20px; }
}