/* ===================================================
   明升机械企业官网 - 主样式表
   简约大气工业风格
   =================================================== */

/* ---- CSS 变量 ---- */
:root {
  --primary: #1a3d6e;        /* 深蓝主色 */
  --primary-light: #2155a0;  /* 中蓝 */
  --primary-dark: #0f2540;   /* 深蓝深色 */
  --accent: #e8851a;         /* 橙色强调 */
  --accent-dark: #c96d0a;
  --text-dark: #1a1a2e;
  --text-mid: #4a5568;
  --text-light: #718096;
  --bg-white: #ffffff;
  --bg-light: #f7f8fc;
  --bg-dark: #0d1b2e;
  --border: #e2e8f0;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.10);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.15);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: 0.3s ease;
  --font: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

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

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- 导航栏 ---- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: transparent;
  transition: background 0.4s, box-shadow 0.4s;
  padding: 0;
}
.header.scrolled {
  background: rgba(13, 27, 46, 0.97);
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
  backdrop-filter: blur(10px);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-icon {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: white;
  font-size: 20px;
}
.logo-icon .fa-cog { animation: spin-slow 8s linear infinite; }
@keyframes spin-slow { to { transform: rotate(360deg); } }
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-name { font-size: 20px; font-weight: 700; color: white; letter-spacing: 2px; }
.logo-en { font-size: 10px; font-weight: 300; color: rgba(255,255,255,0.6); letter-spacing: 2px; }
.nav { display: flex; align-items: center; gap: 8px; }
.nav-link {
  padding: 8px 18px;
  color: rgba(255,255,255,0.85);
  font-size: 15px;
  font-weight: 400;
  border-radius: 6px;
  transition: var(--transition);
  letter-spacing: 0.5px;
}
.nav-link:hover, .nav-link.active {
  color: white;
  background: rgba(255,255,255,0.12);
}
.nav-link.active {
  color: var(--accent);
  background: rgba(232,133,26,0.15);
}

/* ---- 汉堡菜单 ---- */
.menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.menu-btn span {
  display: block;
  width: 24px; height: 2px;
  background: white;
  border-radius: 2px;
  transition: var(--transition);
}
.menu-btn.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-btn.open span:nth-child(2) { opacity: 0; }
.menu-btn.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 32px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
  cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: white;
  box-shadow: 0 4px 15px rgba(232,133,26,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(232,133,26,0.45);
  color: white;
}
.btn-outline {
  background: transparent;
  border: 2px solid rgba(255,255,255,0.7);
  color: white;
}
.btn-outline:hover {
  background: rgba(255,255,255,0.15);
  border-color: white;
  transform: translateY(-2px);
}
.btn-white {
  background: white;
  color: var(--primary);
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}
.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.15);
  color: var(--primary);
}
.btn-sm { padding: 9px 22px; font-size: 14px; }
.btn-block { width: 100%; justify-content: center; }

/* ---- 英雄区 ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--bg-dark);
}
.hero-bg {
  position: absolute;
  inset: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,27,46,0.98) 0%, rgba(26,61,110,0.85) 50%, rgba(10,20,40,0.95) 100%);
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: grid-move 20s linear infinite;
}
@keyframes grid-move {
  from { transform: translateY(0); }
  to { transform: translateY(60px); }
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 120px 24px 80px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(232,133,26,0.15);
  border: 1px solid rgba(232,133,26,0.4);
  color: var(--accent);
  padding: 6px 18px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 2px;
  margin-bottom: 28px;
  backdrop-filter: blur(5px);
}
.hero-title {
  font-size: clamp(42px, 7vw, 80px);
  font-weight: 900;
  color: white;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -1px;
}
.hero-title .highlight {
  color: var(--accent);
  position: relative;
}
.hero-title .highlight::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0; right: 0;
  height: 4px;
  background: var(--accent);
  border-radius: 2px;
  opacity: 0.4;
}
.hero-desc {
  font-size: 17px;
  color: rgba(255,255,255,0.7);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 640px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.4);
  font-size: 11px;
  letter-spacing: 2px;
  animation: bounce 2s infinite;
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ---- 数据统计条 ---- */
.stats-bar {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  padding: 48px 0;
  position: relative;
  overflow: hidden;
}
.stats-bar::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");
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}
.stat-item {
  text-align: center;
  padding: 20px;
  border-right: 1px solid rgba(255,255,255,0.1);
  position: relative;
}
.stat-item:last-child { border-right: none; }
.stat-num {
  font-size: clamp(40px, 5vw, 60px);
  font-weight: 900;
  color: white;
  line-height: 1;
  display: inline-block;
}
.stat-unit { font-size: 24px; font-weight: 700; color: var(--accent); }
.stat-label {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  margin-top: 8px;
  letter-spacing: 1px;
}

/* ---- 通用 Section ---- */
.section { padding: 100px 0; }
.section.bg-light { background: var(--bg-light); }
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
  display: inline-block;
  background: rgba(26,61,110,0.08);
  color: var(--primary);
  padding: 4px 16px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 2px;
  margin-bottom: 16px;
  border: 1px solid rgba(26,61,110,0.15);
}
.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.section-desc { font-size: 16px; color: var(--text-light); max-width: 560px; margin: 0 auto; }
.section-cta { text-align: center; margin-top: 48px; }

/* ---- 产品卡片（首页） ---- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.product-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 40px 32px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.product-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}
.product-card:hover::before { transform: scaleX(1); }
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.product-card.featured {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border: none;
}
.product-card.featured::before {
  background: linear-gradient(90deg, var(--accent), var(--accent-dark));
}
.product-card.featured h3,
.product-card.featured p { color: white; }
.product-icon {
  width: 64px; height: 64px;
  background: rgba(26,61,110,0.08);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
  color: var(--primary);
  margin-bottom: 24px;
}
.product-card.featured .product-icon {
  background: rgba(255,255,255,0.15);
  color: white;
}
.product-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; color: var(--text-dark); }
.product-card p { font-size: 14px; color: var(--text-mid); line-height: 1.7; margin-bottom: 24px; }
.featured-tag {
  position: absolute;
  top: 20px; right: 20px;
  background: var(--accent);
  color: white;
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 50px;
  font-weight: 500;
  letter-spacing: 1px;
}
.card-link { font-size: 14px; font-weight: 500; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.product-card.featured .card-link { color: rgba(255,255,255,0.9); }
.card-link:hover { gap: 10px; }

/* ---- 优势网格 ---- */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.advantage-item {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  transition: var(--transition);
}
.advantage-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}
.adv-icon {
  width: 52px; height: 52px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  color: white;
  margin-bottom: 20px;
}
.advantage-item h4 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.advantage-item p { font-size: 14px; color: var(--text-mid); line-height: 1.7; }

/* ---- 应用场景 ---- */
.scenarios { background: var(--bg-dark); }
.scenarios .section-header { padding-bottom: 0; }
.scenarios .section-tag { background: rgba(255,255,255,0.1); color: rgba(255,255,255,0.8); border-color: rgba(255,255,255,0.2); }
.scenarios .section-title { color: white; }
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  margin-top: 48px;
}
.scenario-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 32px 16px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
}
.scenario-card:hover {
  background: rgba(232,133,26,0.15);
  border-color: var(--accent);
  transform: translateY(-4px);
}
.scenario-icon { font-size: 36px; color: var(--accent); margin-bottom: 16px; }
.scenario-card span { font-size: 14px; color: rgba(255,255,255,0.75); font-weight: 500; letter-spacing: 1px; }

/* ---- CTA 区块 ---- */
.cta-section {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 60%);
}
.cta-content {
  text-align: center;
  position: relative;
  z-index: 1;
}
.cta-content h2 { font-size: 36px; font-weight: 800; color: white; margin-bottom: 16px; }
.cta-content p { font-size: 17px; color: rgba(255,255,255,0.75); margin-bottom: 36px; }

/* ---- 页脚 ---- */
.footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.6);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  padding: 72px 24px 48px;
}
.footer-brand .logo { margin-bottom: 20px; }
.footer-desc { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.5); max-width: 280px; }
.footer h5 { font-size: 15px; font-weight: 600; color: white; margin-bottom: 20px; letter-spacing: 0.5px; }
.footer-links a, .footer-products a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  margin-bottom: 10px;
  transition: var(--transition);
}
.footer-links a:hover, .footer-products a:hover { color: var(--accent); padding-left: 4px; }
.footer-contact p { font-size: 14px; margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.footer-contact .fas { color: var(--accent); width: 16px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 24px;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.3);
}

/* ====== 页面横幅（内页）====== */
.page-hero {
  position: relative;
  height: 300px;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  display: flex;
  align-items: center;
  overflow: hidden;
}
.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}
.page-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,20,40,0.5), rgba(26,61,110,0.3));
}
.page-hero-content {
  position: relative;
  z-index: 2;
  padding-top: 72px;
}
.page-hero-content h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 900;
  color: white;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
}
.breadcrumb a { color: rgba(255,255,255,0.7); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .fas { font-size: 10px; }

/* ====== 关于我们 ====== */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.about-text .section-tag { margin-bottom: 12px; }
.about-text h2 { font-size: clamp(26px, 3.5vw, 38px); font-weight: 800; margin-bottom: 20px; color: var(--text-dark); }
.about-text .lead { font-size: 18px; font-weight: 500; color: var(--primary); margin-bottom: 16px; line-height: 1.6; }
.about-text p { font-size: 15px; color: var(--text-mid); line-height: 1.8; margin-bottom: 14px; }
.about-tags { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.about-tags span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(26,61,110,0.07);
  color: var(--primary);
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid rgba(26,61,110,0.15);
}
.about-tags .fas { color: var(--accent); }

/* 工厂插图 */
.about-image-placeholder {
  width: 100%;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.ai-placeholder { width: 100%; height: 100%; position: relative; }
.factory-illustration {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
}
.factory-building {
  background: rgba(255,255,255,0.1);
  width: 70%;
  margin: 0 auto;
  border-radius: 4px 4px 0 0;
  position: relative;
}
.factory-roof {
  height: 50px;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), rgba(255,255,255,0.05));
  clip-path: polygon(0 100%, 50% 0%, 100% 100%);
  margin-bottom: -2px;
}
.factory-body {
  height: 120px;
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.factory-windows {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  width: 100%;
}
.fw {
  height: 28px;
  background: rgba(232,133,26,0.4);
  border-radius: 3px;
  animation: flicker 3s ease-in-out infinite alternate;
}
.fw:nth-child(2) { animation-delay: 0.5s; }
.fw:nth-child(3) { animation-delay: 1s; }
.fw:nth-child(4) { animation-delay: 1.5s; }
.fw:nth-child(5) { animation-delay: 0.8s; }
.fw:nth-child(6) { animation-delay: 0.3s; }
@keyframes flicker {
  from { background: rgba(232,133,26,0.4); }
  to { background: rgba(232,133,26,0.7); }
}
.factory-door {
  width: 30px; height: 40px;
  background: rgba(0,0,0,0.3);
  margin: 0 auto;
  border-radius: 3px 3px 0 0;
}
.factory-chimney {
  width: 20px; height: 60px;
  background: rgba(255,255,255,0.15);
  position: absolute;
  top: 20px; right: 25%;
  border-radius: 3px 3px 0 0;
}
.factory-ground {
  height: 8px;
  background: rgba(255,255,255,0.08);
  border-radius: 0 0 4px 4px;
}
.gear-deco {
  position: absolute;
  color: rgba(232,133,26,0.25);
}
.gear-1 { font-size: 80px; top: 15%; left: 5%; animation: spin-slow 6s linear infinite; }
.gear-2 { font-size: 50px; top: 30%; right: 5%; animation: spin-slow 4s linear infinite reverse; }
.about-stats-mini {
  display: flex;
  gap: 16px;
  margin-top: 20px;
}
.mini-stat {
  flex: 1;
  background: rgba(26,61,110,0.07);
  border: 1px solid rgba(26,61,110,0.12);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
}
.mini-stat strong { display: block; font-size: 28px; font-weight: 900; color: var(--primary); }
.mini-stat span { font-size: 13px; color: var(--text-mid); }

/* 时间线 */
.timeline { position: relative; max-width: 900px; margin: 0 auto; }
.timeline::before {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  left: 130px;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--primary-light));
}
.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: 0;
  margin-bottom: 48px;
  position: relative;
}
.timeline-year {
  width: 110px;
  min-width: 110px;
  font-size: 22px;
  font-weight: 900;
  color: var(--primary);
  text-align: right;
  padding-right: 20px;
  padding-top: 2px;
}
.timeline-dot {
  width: 16px; height: 16px;
  min-width: 16px;
  background: var(--accent);
  border: 3px solid var(--bg-light);
  border-radius: 50%;
  margin-top: 5px;
  box-shadow: 0 0 0 3px rgba(232,133,26,0.3);
  z-index: 1;
  position: relative;
}
.timeline-content {
  padding-left: 24px;
  flex: 1;
}
.timeline-content h4 { font-size: 18px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
.timeline-content p { font-size: 14px; color: var(--text-mid); line-height: 1.7; }

/* 企业文化 */
.culture-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.culture-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 36px 24px;
  text-align: center;
  transition: var(--transition);
}
.culture-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.culture-icon {
  width: 60px; height: 60px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  color: white;
  margin: 0 auto 20px;
}
.culture-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; color: var(--text-dark); }
.culture-card p { font-size: 14px; color: var(--text-mid); line-height: 1.7; }

/* 荣誉资质 */
.honors-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.honor-item {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 36px 24px;
  text-align: center;
  transition: var(--transition);
}
.honor-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--accent); }
.honor-icon { font-size: 40px; color: var(--accent); margin-bottom: 16px; }
.honor-item h4 { font-size: 16px; font-weight: 700; margin-bottom: 6px; color: var(--text-dark); }
.honor-item p { font-size: 13px; color: var(--text-light); }

/* ====== 产品页 ====== */
.filter-tabs {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.filter-btn {
  padding: 10px 24px;
  border: 2px solid var(--border);
  border-radius: 50px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-mid);
  background: white;
  transition: var(--transition);
  cursor: pointer;
}
.filter-btn:hover, .filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.product-section { margin-bottom: 72px; }
.product-category-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}
.product-category-title .fas { color: var(--accent); font-size: 20px; }

.product-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.product-detail-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}
.product-detail-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: transparent; }
.pd-visual {
  height: 180px;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  display: flex; align-items: center; justify-content: center;
  position: relative;
  overflow: hidden;
}
.pd-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 10px,
    rgba(255,255,255,0.03) 10px,
    rgba(255,255,255,0.03) 20px
  );
}
.pd-icon-wrap { font-size: 64px; color: rgba(255,255,255,0.2); position: relative; z-index: 1; }
.pd-badge {
  position: absolute;
  top: 16px; right: 16px;
  background: var(--accent);
  color: white;
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 50px;
  font-weight: 500;
}
.pd-badge-blue { background: var(--primary-light); }
.pd-info { padding: 28px; flex: 1; display: flex; flex-direction: column; }
.pd-info h4 { font-size: 20px; font-weight: 700; color: var(--text-dark); margin-bottom: 6px; }
.pd-model { font-size: 12px; color: var(--accent); font-weight: 500; letter-spacing: 1px; margin-bottom: 14px; }
.pd-desc { font-size: 14px; color: var(--text-mid); line-height: 1.7; margin-bottom: 20px; flex: 1; }
.pd-specs { margin-bottom: 24px; }
.pd-specs li {
  font-size: 13px;
  color: var(--text-mid);
  padding: 6px 0;
  border-bottom: 1px dashed var(--border);
  display: flex;
  gap: 6px;
}
.pd-specs li:last-child { border-bottom: none; }
.pd-specs li span { font-weight: 500; color: var(--text-dark); min-width: 80px; }

/* 简单产品卡片 */
.product-simple-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.product-simple-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition);
}
.product-simple-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--primary); }
.ps-icon { font-size: 36px; color: var(--primary); margin-bottom: 16px; }
.product-simple-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; color: var(--text-dark); }
.product-simple-card p { font-size: 13px; color: var(--text-mid); margin-bottom: 16px; }

/* 服务流程 */
.service-flow {
  display: flex;
  align-items: flex-start;
  gap: 0;
  overflow-x: auto;
  padding: 20px 0;
}
.flow-step {
  flex: 1;
  min-width: 140px;
  text-align: center;
  padding: 0 16px;
}
.flow-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.flow-icon {
  width: 64px; height: 64px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  color: white;
  margin: 0 auto 16px;
  box-shadow: 0 4px 15px rgba(26,61,110,0.3);
}
.flow-step h4 { font-size: 15px; font-weight: 700; margin-bottom: 8px; color: var(--text-dark); }
.flow-step p { font-size: 12px; color: var(--text-light); line-height: 1.6; }
.flow-arrow {
  display: flex;
  align-items: center;
  padding-top: 32px;
  color: var(--border);
  font-size: 18px;
}

/* ====== 联系我们 ====== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: flex-start;
}
.contact-info .section-tag { margin-bottom: 12px; }
.contact-info h2 { font-size: clamp(26px, 3.5vw, 36px); font-weight: 800; margin-bottom: 16px; color: var(--text-dark); }
.contact-info .lead { font-size: 16px; color: var(--text-mid); line-height: 1.7; margin-bottom: 32px; }

.contact-cards { display: flex; flex-direction: column; gap: 16px; margin-bottom: 32px; }
.contact-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  transition: var(--transition);
}
.contact-card:hover { border-color: var(--primary); background: white; box-shadow: var(--shadow-sm); }
.cc-icon {
  width: 44px; height: 44px;
  min-width: 44px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: white;
  font-size: 16px;
}
.cc-content h4 { font-size: 15px; font-weight: 600; margin-bottom: 4px; color: var(--text-dark); }
.cc-content p { font-size: 15px; font-weight: 500; color: var(--primary); margin-bottom: 2px; }
.cc-note { font-size: 12px; color: var(--text-light); }

.business-hours {
  background: rgba(26,61,110,0.06);
  border: 1px solid rgba(26,61,110,0.12);
  border-radius: var(--radius-sm);
  padding: 20px;
}
.business-hours h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.business-hours .fas { color: var(--primary); }
.hours-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid rgba(26,61,110,0.08);
  font-size: 14px;
  color: var(--text-mid);
}
.hours-row:last-child { border-bottom: none; }

/* 表单 */
.contact-form-wrap {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
}
.form-header { margin-bottom: 28px; }
.form-header h3 { font-size: 22px; font-weight: 700; color: var(--text-dark); margin-bottom: 6px; }
.form-header p { font-size: 14px; color: var(--text-light); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-dark);
  margin-bottom: 8px;
}
.required { color: var(--accent); }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: var(--font);
  color: var(--text-dark);
  background: var(--bg-white);
  transition: var(--transition);
  outline: none;
  appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,61,110,0.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-check label { display: flex; align-items: flex-start; gap: 10px; cursor: pointer; font-size: 13px; color: var(--text-mid); }
.form-check input { width: auto; margin-top: 2px; accent-color: var(--primary); }
.form-check a { color: var(--primary); }
.form-success {
  text-align: center;
  padding: 60px 20px;
}
.success-icon { font-size: 60px; color: #22c55e; margin-bottom: 20px; animation: pop-in 0.5s ease; }
@keyframes pop-in { from { transform: scale(0); } to { transform: scale(1); } }
.form-success h4 { font-size: 22px; font-weight: 700; margin-bottom: 12px; color: var(--text-dark); }
.form-success p { color: var(--text-mid); font-size: 15px; }

/* 地图区域 */
.map-section { height: 360px; position: relative; overflow: hidden; }
.map-placeholder {
  height: 100%;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.map-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
}
.map-overlay-text {
  text-align: center;
  position: relative;
  z-index: 2;
}
.map-pin-anim { font-size: 48px; color: var(--accent); margin-bottom: 16px; animation: pulse-pin 2s ease-in-out infinite; }
@keyframes pulse-pin {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
.map-overlay-text h3 { font-size: 24px; font-weight: 700; color: white; margin-bottom: 8px; }
.map-overlay-text p { font-size: 15px; color: rgba(255,255,255,0.7); margin-bottom: 24px; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--primary); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-dark);
}
.faq-question .fas { color: var(--primary); font-size: 14px; transition: var(--transition); flex-shrink: 0; }
.faq-item.open .faq-question .fas { transform: rotate(45deg); color: var(--accent); }
.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: all 0.3s ease;
}
.faq-item.open .faq-answer { max-height: 200px; padding: 0 24px 20px; }
.faq-answer p { font-size: 14px; color: var(--text-mid); line-height: 1.7; }

/* ====== 动画 ====== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-up:nth-child(2) { transition-delay: 0.1s; }
.fade-up:nth-child(3) { transition-delay: 0.2s; }
.fade-up:nth-child(4) { transition-delay: 0.3s; }

/* ====== 响应式 ====== */
@media (max-width: 1024px) {
  .products-grid, .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .scenarios-grid { grid-template-columns: repeat(3, 1fr); }
  .culture-grid, .honors-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2n) { border-right: none; }
  .stat-item:nth-child(1), .stat-item:nth-child(2) { border-bottom: 1px solid rgba(255,255,255,0.1); }
  .about-intro { grid-template-columns: 1fr; gap: 40px; }
  .contact-layout { grid-template-columns: 1fr; gap: 40px; }
  .product-detail-grid { grid-template-columns: 1fr; }
  .product-simple-grid { grid-template-columns: repeat(2, 1fr); }
  .service-flow { gap: 4px; }
  .flow-arrow { display: none; }
  .flow-step { padding: 0 8px; }
}

@media (max-width: 768px) {
  .nav { 
    display: none;
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: rgba(13,27,46,0.97);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
    backdrop-filter: blur(10px);
  }
  .nav.open { display: flex; }
  .nav-link { padding: 14px 20px; font-size: 16px; border-radius: var(--radius-sm); }
  .menu-btn { display: flex; }
  .products-grid { grid-template-columns: 1fr; }
  .advantages-grid { grid-template-columns: 1fr; }
  .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
  .culture-grid { grid-template-columns: 1fr; }
  .honors-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .hero-actions .btn { width: 100%; justify-content: center; max-width: 320px; }
  .form-row { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: 24px; }
  .timeline::before { left: 80px; }
  .timeline-year { width: 60px; font-size: 16px; }
  .service-flow {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .product-simple-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 64px 0; }
}

@media (max-width: 480px) {
  .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
  .honors-grid { grid-template-columns: 1fr; }
  .stat-item { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.1); }
  .stat-item:last-child { border-bottom: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .product-simple-grid { grid-template-columns: 1fr; }
  .cta-content h2 { font-size: 26px; }
  .service-flow { grid-template-columns: 1fr; }
}