/* ===================================
   泽丽威控股集团 - 官网样式
   =================================== */

/* ---- CSS变量 ---- */
:root {
  --primary: #0a3d7c;
  --primary-light: #1557a8;
  --primary-dark: #06285a;
  --accent: #e8a020;
  --accent-hover: #d4901a;
  --text-main: #1a1a2e;
  --text-sub: #555577;
  --text-light: #888;
  --bg-white: #ffffff;
  --bg-light: #f5f7fb;
  --bg-dark: #0d1b3e;
  --border: #e0e6f0;
  --shadow: 0 4px 24px rgba(10,61,124,0.10);
  --shadow-hover: 0 8px 40px rgba(10,61,124,0.18);
  --radius: 12px;
  --radius-sm: 6px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --header-height: 72px;
}

/* ---- 全局重置 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-main);
  background: var(--bg-white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; transition: color var(--transition); }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, select, textarea { font-family: inherit; }

/* ---- 容器 ---- */
.container {
  max-width: 1260px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ---- 通用按钮 ---- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: #fff;
  padding: 12px 28px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(232,160,32,0.35);
  color: #fff;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 2px solid var(--primary);
  color: var(--primary);
  padding: 11px 28px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 600;
  transition: all var(--transition);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}
.btn-full { width: 100%; justify-content: center; }
.mt-20 { margin-top: 20px; }

/* ---- Section 通用头部 ---- */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-header.light .section-tag,
.section-header.light .section-title,
.section-header.light .section-subtitle { color: rgba(255,255,255,0.9); }
.section-header.light .section-tag { color: var(--accent); }
.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.section-title {
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.3;
}
.section-header.light .section-title { color: #fff; }
.section-subtitle {
  font-size: 16px;
  color: var(--text-sub);
}
.section-header.light .section-subtitle { color: rgba(255,255,255,0.7); }


/* ============================
   导航
   ============================ */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-height);
  z-index: 1000;
  transition: background var(--transition), box-shadow var(--transition);
  background: transparent;
}
.header.scrolled {
  background: rgba(255,255,255,0.98);
  box-shadow: 0 2px 20px rgba(10,61,124,0.12);
}
.header.scrolled .nav-link { color: var(--text-main); }
.header.scrolled .nav-link:hover,
.header.scrolled .nav-link.active { color: var(--primary); }
.header.scrolled .logo-cn { color: var(--primary); }
.header.scrolled .logo-en { color: var(--primary-light); }
.header.scrolled .logo-icon { background: var(--primary); }
.header.scrolled .btn-call { color: var(--primary); border-color: var(--primary); }
.header.scrolled .logo-img { filter: none; /* 滚动后白背景恢复原色logo */ }
.header-inner {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 40px;
  gap: 32px;
}
.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  height: 100%;
}
.logo-img {
  height: 60px;
  width: auto;
  display: block;
  object-fit: contain;
  min-width: 200px;
  vertical-align: middle;
  filter: brightness(0) invert(1); /* 初始深色背景上显示白色logo */
}
/* Logo */
.logo-cn {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 1px;
  transition: color var(--transition);
}
.logo-en {
  font-size: 9px;
  font-weight: 600;
  color: rgba(255,255,255,0.7);
  letter-spacing: 2px;
  transition: color var(--transition);
}
.nav {
  display: flex;
  gap: 4px;
  margin-left: auto;
}
.nav-link {
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255,255,255,0.9);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px; left: 16px; right: 16px;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform var(--transition);
  border-radius: 1px;
}
.nav-link:hover::after,
.nav-link.active::after { transform: scaleX(1); }
.nav-link:hover, .nav-link.active { color: #fff; }
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.btn-call {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: rgba(255,255,255,0.9);
  border: 1px solid rgba(255,255,255,0.4);
  padding: 8px 16px;
  border-radius: 4px;
  transition: all var(--transition);
}
.btn-call svg { width: 14px; height: 14px; }
.btn-call:hover { background: rgba(255,255,255,0.1); }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  margin-left: auto;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all var(--transition);
}
.header.scrolled .hamburger span { background: var(--text-main); }


/* ============================
   Hero Banner
   ============================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
}
.hero-slider {
  position: absolute;
  inset: 0;
}
.hero-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 1s ease;
}
.hero-slide.active { opacity: 1; }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(6,40,90,0.82) 0%, rgba(10,61,124,0.55) 50%, rgba(0,0,0,0.25) 100%);
}
.hero-content {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: #fff;
  max-width: 800px;
  width: 100%;
  padding: 0 32px;
}
.hero-tag {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s 0.2s forwards;
}
.hero-title {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s 0.4s forwards;
}
.hero-desc {
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.8;
  color: rgba(255,255,255,0.85);
  margin-bottom: 36px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s 0.6s forwards;
}
.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.8s 0.8s forwards;
}
.btn-hero-primary {
  padding: 14px 36px;
  background: var(--accent);
  color: #fff;
  border-radius: 4px;
  font-size: 16px;
  font-weight: 600;
  transition: all var(--transition);
}
.btn-hero-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(232,160,32,0.4);
  color: #fff;
}
.btn-hero-outline {
  padding: 13px 36px;
  border: 2px solid rgba(255,255,255,0.7);
  color: #fff;
  border-radius: 4px;
  font-size: 16px;
  font-weight: 600;
  transition: all var(--transition);
}
.btn-hero-outline:hover {
  background: rgba(255,255,255,0.15);
  border-color: #fff;
  transform: translateY(-3px);
}
.hero-dots {
  position: absolute;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}
.dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  border: 2px solid transparent;
  transition: all var(--transition);
}
.dot.active {
  background: var(--accent);
  border-color: var(--accent);
  transform: scale(1.3);
}
.hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px; height: 48px;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(4px);
  color: #fff;
  font-size: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: all var(--transition);
  border: 1px solid rgba(255,255,255,0.3);
}
.hero-prev { left: 24px; }
.hero-next { right: 24px; }
.hero-arrow:hover { background: var(--accent); border-color: var(--accent); }
.scroll-hint {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: rgba(255,255,255,0.6);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  z-index: 10;
  animation: bounce 2s infinite;
}
.scroll-hint svg { width: 20px; height: 20px; }
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}


/* ============================
   核心数据
   ============================ */
.stats {
  background: var(--primary);
  padding: 56px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stat-item {
  text-align: center;
  padding: 32px 20px;
  border-right: 1px solid rgba(255,255,255,0.15);
  color: #fff;
}
.stat-item:last-child { border-right: none; }
.stat-num {
  font-size: clamp(40px, 4vw, 58px);
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.stat-unit {
  font-size: 20px;
  font-weight: 600;
  color: var(--accent);
}
.stat-label {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  margin-top: 10px;
  letter-spacing: 1px;
}


/* ============================
   关于我们
   ============================ */
.about {
  padding: 100px 0;
  background: var(--bg-white);
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}
.about-img-wrap {
  position: relative;
}
.about-img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  object-position: center 30%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
}
.about-badge {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: var(--primary);
  color: #fff;
  width: 110px; height: 110px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 30px rgba(10,61,124,0.35);
}
.badge-year {
  font-size: 26px;
  font-weight: 800;
  line-height: 1;
  color: var(--accent);
}
.badge-text {
  font-size: 11px;
  color: rgba(255,255,255,0.8);
  margin-top: 4px;
}
.about-heading {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
}
.about-text {
  font-size: 15px;
  color: var(--text-sub);
  margin-bottom: 14px;
  line-height: 1.85;
}
.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
  margin-bottom: 8px;
}
.tag {
  padding: 6px 18px;
  border: 1px solid var(--primary);
  color: var(--primary);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  transition: all var(--transition);
}
.tag:hover {
  background: var(--primary);
  color: #fff;
}


/* ============================
   核心业务
   ============================ */
.business {
  position: relative;
  padding: 100px 0;
  background: var(--bg-dark);
  overflow: hidden;
}
.business-bg {
  position: absolute;
  inset: 0;
  background: url('https://images.unsplash.com/photo-1486325212027-8081e485255e?w=1920&q=30') center/cover no-repeat;
  opacity: 0.06;
}
.biz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  position: relative;
}
.biz-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: all var(--transition);
  backdrop-filter: blur(4px);
}
.biz-card:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--accent);
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}
.biz-icon {
  width: 56px; height: 56px;
  background: rgba(232,160,32,0.15);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  transition: background var(--transition);
}
.biz-icon svg { width: 28px; height: 28px; stroke: var(--accent); }
.biz-card:hover .biz-icon { background: var(--accent); }
.biz-card:hover .biz-icon svg { stroke: #fff; }
.biz-title {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}
.biz-desc {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  line-height: 1.8;
  margin-bottom: 20px;
}
.biz-more {
  font-size: 13px;
  color: var(--accent);
  font-weight: 600;
  transition: gap var(--transition);
  display: inline-block;
}
.biz-more:hover { color: #f0c050; }


/* ============================
   旗下项目
   ============================ */
.projects {
  padding: 100px 0;
  background: var(--bg-light);
}
.proj-filter {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.filter-btn {
  padding: 8px 22px;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 14px;
  color: var(--text-sub);
  background: #fff;
  transition: all var(--transition);
}
.filter-btn.active, .filter-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.proj-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.proj-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}
.proj-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.proj-img-wrap {
  position: relative;
  overflow: hidden;
  height: 240px;
}
.proj-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  transition: transform 0.5s ease;
}
.proj-card:hover .proj-img { transform: scale(1.07); }
.proj-tag {
  position: absolute;
  top: 14px; left: 14px;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
}
.proj-info {
  padding: 22px 24px 28px;
}
.proj-name {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}
.proj-loc {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 12px;
}
.proj-loc svg { width: 14px; height: 14px; flex-shrink: 0; }
.proj-desc {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.75;
  margin-bottom: 18px;
}
.proj-btn {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  border-bottom: 1px solid var(--primary);
  padding-bottom: 2px;
  transition: all var(--transition);
}
.proj-btn:hover { color: var(--accent); border-color: var(--accent); }
.proj-more-wrap {
  text-align: center;
  margin-top: 48px;
}


/* ============================
   企业优势
   ============================ */
.advantage {
  padding: 100px 0;
  background: #fff;
}
.adv-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
  align-items: center;
}
.adv-title {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.3;
  margin: 12px 0 20px;
}
.adv-desc {
  font-size: 16px;
  color: var(--text-sub);
  line-height: 1.8;
  margin-bottom: 32px;
}
.adv-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 24px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.adv-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
  transform: translateX(4px);
}
.adv-icon {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  opacity: 0.2;
  line-height: 1;
  flex-shrink: 0;
  width: 44px;
  transition: opacity var(--transition);
}
.adv-item:hover .adv-icon { opacity: 1; }
.adv-text h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-main);
}
.adv-text p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
}


/* ============================
   新闻资讯
   ============================ */
.news {
  padding: 100px 0;
  background: var(--bg-light);
}
.news-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border);
  margin-bottom: 40px;
  justify-content: center;
}
.news-tab {
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-sub);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition);
}
.news-tab.active, .news-tab:hover {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 700;
}
.news-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.news-featured {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}
.news-featured:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.news-feat-img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}
.news-feat-info {
  padding: 24px 28px 30px;
}
.news-date {
  font-size: 12px;
  color: var(--text-light);
  letter-spacing: 1px;
  display: block;
  margin-bottom: 10px;
}
.news-feat-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.5;
  margin-bottom: 12px;
}
.news-feat-desc {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.75;
  margin-bottom: 18px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-read-more {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: color var(--transition);
}
.news-read-more:hover { color: var(--accent); }
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.news-item {
  display: flex;
  gap: 16px;
  background: #fff;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(10,61,124,0.06);
  transition: all var(--transition);
}
.news-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow);
}
.news-item-img {
  width: 100px;
  height: 80px;
  object-fit: cover;
  flex-shrink: 0;
}
.news-item-info {
  padding: 14px 16px 14px 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex: 1;
}
.news-item-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-item-link {
  font-size: 12px;
  color: var(--primary);
  font-weight: 600;
  transition: color var(--transition);
}
.news-item-link:hover { color: var(--accent); }
.news-more-wrap {
  text-align: center;
  margin-top: 48px;
}


/* ============================
   合作伙伴
   ============================ */
.partners {
  padding: 80px 0;
  background: #fff;
  overflow: hidden;
}
.partner-track {
  overflow: hidden;
  position: relative;
  mask-image: linear-gradient(to right, transparent, #fff 80px, #fff calc(100% - 80px), transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, #fff 80px, #fff calc(100% - 80px), transparent);
}
.partner-inner {
  display: flex;
  gap: 20px;
  width: max-content;
  animation: scroll-left 25s linear infinite;
}
.partner-inner:hover { animation-play-state: paused; }
.partner-logo {
  flex-shrink: 0;
  width: 160px; height: 60px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-sub);
  transition: all var(--transition);
}
.partner-logo:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: #fff;
}
@keyframes scroll-left {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}


/* ============================
   联系我们
   ============================ */
.contact {
  padding: 100px 0;
  background: var(--bg-light);
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  align-items: start;
}
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.contact-info-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.ci-icon {
  width: 46px; height: 46px;
  background: var(--primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.ci-icon svg { width: 20px; height: 20px; stroke: #fff; }
.contact-info-item h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}
.contact-info-item p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
}
.contact-form-wrap {
  background: #fff;
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
}
.form-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 24px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-group {
  margin-bottom: 16px;
}
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}
.required { color: #e84040; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-main);
  background: var(--bg-light);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(10,61,124,0.08);
  background: #fff;
}
.form-group textarea { resize: vertical; }
.form-tip {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 12px;
  text-align: center;
}
.form-tip a { color: var(--primary); text-decoration: underline; }


/* ============================
   页脚
   ============================ */
.footer { background: #0d1b3e; }
.footer-top { padding: 48px 0 32px; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.footer-logo {
  display: flex;
  align-items: center;
  margin-bottom: 12px;
}
.footer-logo .logo-img {
  height: 80px;
  width: auto;
  display: block;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.9;
}
.footer-slogan {
  font-size: 25px;
  color: var(--accent);
  margin: 16px 0 8px;
  letter-spacing: 1px;
}
.footer-desc {
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  line-height: 1.7;
  margin-bottom: 16px;
}
.social-links { display: flex; gap: 8px; margin-top: 4px; }
.social-link {
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.08);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  transition: all var(--transition);
}
.social-link svg { width: 16px; height: 16px; }
.social-link:hover { background: var(--accent); color: #fff; }
.footer-links-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 12px;
}
.footer-links-col h4::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 28px; height: 2px;
  background: var(--accent);
  border-radius: 1px;
}
.footer-links-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-links-col a {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  transition: color var(--transition);
}
.footer-links-col a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p, .footer-bottom a {
  font-size: 13px;
  color: rgba(255,255,255,0.35);
}
.footer-bottom a:hover { color: var(--accent); }


/* ============================
   浮动组件
   ============================ */
.back-top {
  position: fixed;
  bottom: 100px;
  right: 28px;
  width: 44px; height: 44px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(10,61,124,0.35);
  z-index: 900;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: all var(--transition);
}
.back-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-top:hover { background: var(--accent); transform: translateY(-3px); }
.back-top svg { width: 18px; height: 18px; }
.float-service {
  position: fixed;
  right: 28px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 900;
}
.float-item {
  position: relative;
  width: 44px; height: 44px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(10,61,124,0.25);
  cursor: pointer;
  transition: all var(--transition);
}
.float-item svg { width: 18px; height: 18px; }
.float-item:hover { background: var(--accent); transform: scale(1.1); }
.float-tooltip {
  position: absolute;
  right: 56px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--primary-dark);
  color: #fff;
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}
.float-tooltip::after {
  content: '';
  position: absolute;
  left: 100%;
  top: 50%;
  transform: translateY(-50%);
  border: 5px solid transparent;
  border-left-color: var(--primary-dark);
}
.float-item:hover .float-tooltip { opacity: 1; }

/* 微信二维码弹窗 */
.wechat-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}
.wechat-modal.show {
  opacity: 1;
  visibility: visible;
}
.wechat-modal-content {
  background: #fff;
  padding: 32px;
  border-radius: var(--radius);
  text-align: center;
  position: relative;
  max-width: 320px;
  width: 90%;
  transform: scale(0.9);
  transition: transform 0.3s ease;
}
.wechat-modal.show .wechat-modal-content {
  transform: scale(1);
}
.wechat-modal-content h3 {
  font-size: 18px;
  color: var(--text-main);
  margin-bottom: 20px;
}
.wechat-modal-content img {
  width: 200px;
  height: 200px;
  object-fit: contain;
  margin-bottom: 16px;
}
.wechat-modal-content p {
  font-size: 14px;
  color: var(--text-sub);
}
.wechat-close {
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 28px;
  color: var(--text-light);
  cursor: pointer;
  line-height: 1;
  transition: color 0.2s;
}
.wechat-close:hover {
  color: var(--text-main);
}

/* ============================
   滚动动画
   ============================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}
.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}


/* ============================
   响应式
   ============================ */
@media (max-width: 1100px) {
  .about-grid { gap: 48px; }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 900px) {
  :root { --header-height: 60px; }
  .nav, .header-actions .btn-call { display: none; }
  .hamburger { display: flex; }
  .hero-content { padding: 0 24px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .about-grid, .adv-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-img { height: 260px; }
  .about-badge { bottom: -10px; right: -10px; width: 80px; height: 80px; }
  .badge-year { font-size: 18px; }
  .biz-grid { grid-template-columns: repeat(2, 1fr); }
  .proj-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .float-service { display: none; }
  .adv-grid { gap: 32px; }
}
@media (max-width: 600px) {
  .container { padding: 0 20px; }
  .header-inner { padding: 0 20px; }
  .hero-title { font-size: 30px; }
  .hero-btns { flex-direction: column; align-items: center; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .biz-grid { grid-template-columns: 1fr; }
  .proj-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: 24px 20px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .about { padding: 64px 0; }
  .business, .projects, .advantage, .news, .contact { padding: 64px 0; }
  .section-header { margin-bottom: 36px; }
  .news-feat-title { font-size: 16px; }
}

/* 移动端菜单打开状态 */
.nav.open {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: var(--header-height);
  left: 0; right: 0;
  background: rgba(255,255,255,0.98);
  padding: 20px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.12);
  gap: 4px;
}
.nav.open .nav-link { color: var(--text-main); padding: 12px 16px; }
.nav.open .nav-link.active,
.nav.open .nav-link:hover { color: var(--primary); background: var(--bg-light); border-radius: var(--radius-sm); }

/* 表单提交成功提示 */
.form-success {
  text-align: center;
  padding: 40px 20px;
  color: #2e7d32;
}
.form-success svg { width: 56px; height: 56px; stroke: #4caf50; margin: 0 auto 16px; }
.form-success h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.form-success p { font-size: 14px; color: var(--text-sub); }

/* ===== 隐私政策弹窗 ===== */
.privacy-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10, 29, 62, 0.65);
  backdrop-filter: blur(4px);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.privacy-modal.active { display: flex; }
.privacy-modal-content {
  background: #fff;
  border-radius: 12px;
  width: 100%;
  max-width: 800px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
  overflow: hidden;
}
.privacy-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 28px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.privacy-modal-header h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  margin: 0;
}
.privacy-close {
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
  color: var(--text-sub);
  transition: color .2s;
  background: none;
  border: none;
}
.privacy-close:hover { color: var(--primary); }
.privacy-modal-body {
  padding: 24px 28px 32px;
  overflow-y: auto;
  flex: 1;
  font-size: 14px;
  color: var(--text-main);
  line-height: 1.85;
}
.privacy-modal-body .privacy-meta {
  background: var(--bg-light);
  border-radius: 6px;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 18px;
}
.privacy-modal-body h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  margin: 24px 0 10px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--bg-light);
}
.privacy-modal-body h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  margin: 16px 0 8px;
}
.privacy-modal-body p { margin-bottom: 10px; }
.privacy-modal-body ul,
.privacy-modal-body ol {
  padding-left: 20px;
  margin-bottom: 10px;
}
.privacy-modal-body li { margin-bottom: 6px; }
.privacy-modal-body a { color: var(--primary); text-decoration: underline; }
.privacy-modal-body a:hover { color: var(--accent); }
@media (max-width: 600px) {
  .privacy-modal-content { max-height: 95vh; border-radius: 8px; }
  .privacy-modal-header { padding: 16px 18px; }
  .privacy-modal-body { padding: 16px 18px 24px; }
}

/* ===== 在线客服聊天窗口 ===== */
.chat-widget {
  position: fixed;
  bottom: 100px;
  right: 24px;
  width: 380px;
  max-height: 520px;
  border-radius: 16px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.18);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 9998;
  background: #fff;
  transform: scale(0) translateY(20px);
  transform-origin: bottom right;
  opacity: 0;
  transition: transform .3s cubic-bezier(.34,1.56,.64,1), opacity .25s;
  pointer-events: none;
}
.chat-widget.open {
  transform: scale(1) translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.chat-toggle.active {
  background: var(--primary) !important;
  color: #fff;
}
.chat-header {
  background: linear-gradient(135deg, var(--primary), #1a3a6b);
  color: #fff;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}
.chat-header-info {
  display: flex;
  align-items: center;
  gap: 10px;
}
.chat-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
}
.chat-header-name {
  font-size: 14px;
  font-weight: 600;
}
.chat-header-status {
  font-size: 11px;
  opacity: 0.8;
}
.chat-header-status::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: #4ade80;
  border-radius: 50%;
  margin-right: 4px;
  vertical-align: middle;
}
.chat-close {
  background: none;
  border: none;
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  line-height: 1;
  opacity: 0.8;
  transition: opacity .2s;
}
.chat-close:hover { opacity: 1; }

/* 消息区域 */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  background: #f8f9fb;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 300px;
  max-height: 360px;
}
.chat-msg {
  display: flex;
  max-width: 85%;
}
.chat-msg.bot { align-self: flex-start; }
.chat-msg.user { align-self: flex-end; }
.chat-bubble {
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 13.5px;
  line-height: 1.6;
  word-break: break-word;
}
.chat-msg.bot .chat-bubble {
  background: #fff;
  color: var(--text-main);
  border-bottom-left-radius: 4px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.chat-msg.user .chat-bubble {
  background: var(--primary);
  color: #fff;
  border-bottom-right-radius: 4px;
}

/* 打字动画 */
.chat-typing {
  display: inline-flex;
  gap: 4px;
  padding: 12px 16px;
  background: #fff;
  border-radius: 14px;
  border-bottom-left-radius: 4px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.chat-typing span {
  width: 7px;
  height: 7px;
  background: #b0b8c8;
  border-radius: 50%;
  animation: typingBounce 1.2s infinite;
}
.chat-typing span:nth-child(2) { animation-delay: 0.2s; }
.chat-typing span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-5px); opacity: 1; }
}

/* 输入区域 */
.chat-input-wrap {
  display: flex;
  align-items: flex-end;
  padding: 10px 12px;
  border-top: 1px solid var(--border);
  background: #fff;
  gap: 8px;
  flex-shrink: 0;
}
.chat-input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 8px 14px;
  font-size: 13.5px;
  font-family: inherit;
  resize: none;
  outline: none;
  max-height: 80px;
  line-height: 1.5;
  transition: border-color .2s;
}
.chat-input:focus { border-color: var(--primary); }
.chat-send {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--primary);
  border: none;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background .2s, transform .15s;
}
.chat-send:hover { background: #1a3a6b; }
.chat-send:active { transform: scale(0.92); }
.chat-send svg { width: 18px; height: 18px; }
.chat-send:disabled {
  background: #c0c8d8;
  cursor: not-allowed;
}

@media (max-width: 480px) {
  .chat-widget {
    right: 0;
    bottom: 0;
    width: 100%;
    max-height: 100vh;
    border-radius: 0;
  }
}