/* ===== 全局样式 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --primary: #00BCD4;
  --primary-dark: #0097A7;
  --primary-light: #4DD0E1;
  --accent: #FF6B6B;
  --dark: #0D1B2A;
  --dark-2: #1B263B;
  --gray: #F5F7FA;
  --gray-2: #E8ECF0;
  --text: #1A1A2E;
  --text-light: #555;
  --text-lighter: #999;
  --white: #FFFFFF;
  --shadow: 0 2px 20px rgba(0,0,0,0.06);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.12);
  --radius: 12px;
  --max-width: 1200px;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--white);
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(13,27,42,0.95);
  backdrop-filter: blur(10px);
  padding: 18px 0;
  transition: all 0.3s;
}
.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.navbar .logo { display: flex; align-items: center; gap: 10px; }
.navbar .logo-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 20px; font-weight: bold;
}
.navbar .logo-text { color: white; font-size: 22px; font-weight: bold; letter-spacing: 1px; }
.navbar .nav-links { display: flex; gap: 35px; align-items: center; list-style: none; }
.navbar .nav-links a {
  color: rgba(255,255,255,0.85); font-size: 15px;
  transition: color 0.2s; position: relative;
}
.navbar .nav-links a:hover { color: white; }
.navbar .nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 2px; background: var(--primary); transition: width 0.3s;
}
.navbar .nav-links a:hover::after { width: 100%; }
.navbar .mobile-menu-btn { display: none; color: white; font-size: 24px; background: none; border: none; cursor: pointer; }
.nav-links.mobile-open {
  display: flex !important; flex-direction: column;
  position: absolute; top: 100%; left: 0; right: 0;
  background: var(--dark); padding: 20px; gap: 16px;
}

/* ===== Hero 区 ===== */
.hero {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 100%);
  min-height: 100vh; display: flex; align-items: center;
  position: relative; overflow: hidden; padding-top: 80px;
}
.hero::before {
  content: ''; position: absolute; top: -200px; right: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(0,188,212,0.15) 0%, transparent 70%);
  border-radius: 50%;
}
.hero::after {
  content: ''; position: absolute; bottom: -150px; left: -150px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(255,107,107,0.08) 0%, transparent 70%);
  border-radius: 50%;
}
.hero .container { display: flex; align-items: center; gap: 40px; position: relative; z-index: 2; }
.hero .hero-content { flex: 1; }
.hero .hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(0,188,212,0.15); border: 1px solid rgba(0,188,212,0.3);
  color: var(--primary-light); padding: 6px 16px; border-radius: 20px; font-size: 13px; margin-bottom: 24px;
}
.hero .hero-badge .dot { width: 6px; height: 6px; background: var(--primary-light); border-radius: 50%; animation: pulse 1.5s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }
.hero h1 { color: white; font-size: 52px; font-weight: 800; line-height: 1.2; margin-bottom: 20px; }
.hero h1 .highlight {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero .hero-sub { color: rgba(255,255,255,0.7); font-size: 18px; margin-bottom: 36px; max-width: 550px; line-height: 1.8; }
.hero .hero-actions { display: flex; gap: 16px; }
.hero .btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white; padding: 14px 36px; border-radius: 8px; font-size: 16px; font-weight: 600;
  transition: all 0.3s; border: none; cursor: pointer; display: inline-block;
}
.hero .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(0,188,212,0.4); }
.hero .btn-outline {
  background: transparent; color: white; padding: 14px 36px; border-radius: 8px; font-size: 16px; font-weight: 600;
  border: 2px solid rgba(255,255,255,0.2); transition: all 0.3s; cursor: pointer; display: inline-block;
}
.hero .btn-outline:hover { border-color: white; background: rgba(255,255,255,0.05); }
.hero .hero-visual { flex: 1; display: flex; justify-content: center; }
.hero .hero-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.hero .hero-mini-card {
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px; padding: 24px 20px; text-align: center;
  backdrop-filter: blur(20px); transition: all 0.3s;
}
.hero .hero-mini-card:hover { background: rgba(0,188,212,0.1); border-color: rgba(0,188,212,0.3); transform: translateY(-4px); }
.hero .hero-mini-card .emoji { font-size: 36px; display: block; margin-bottom: 10px; }
.hero .hero-mini-card span:last-child { color: rgba(255,255,255,0.85); font-size: 13px; font-weight: 600; }

/* ===== 数据统计区 ===== */
.stats { background: var(--gray); padding: 60px 0; }
.stats .container { display: flex; justify-content: space-around; flex-wrap: wrap; gap: 30px; }
.stats .stat-item { text-align: center; }
.stats .stat-item .num { font-size: 42px; font-weight: 800; color: var(--primary); margin-bottom: 8px; }
.stats .stat-item .label { font-size: 14px; color: var(--text-light); }

/* ===== 通用 Section Header ===== */
.section-header { text-align: center; margin-bottom: 60px; }
.section-header .badge { display: inline-block; background: var(--primary); color: white; padding: 4px 14px; border-radius: 20px; font-size: 12px; margin-bottom: 16px; }
.section-header h2 { font-size: 36px; font-weight: 800; color: var(--text); margin-bottom: 12px; }
.section-header p { font-size: 16px; color: var(--text-light); max-width: 600px; margin: 0 auto; }

/* ===== 产品中心 ===== */
.products { padding: 80px 0; background: white; }
.products .product-list { display: flex; flex-direction: column; gap: 60px; }
.products .product-item { display: flex; gap: 40px; align-items: center; }
.products .product-item.reverse { flex-direction: row-reverse; }
.products .product-visual {
  flex: 0 0 320px; height: 240px; border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow);
}
.products .product-visual .product-emoji { font-size: 80px; }
.products .product-detail { flex: 1; }
.products .product-detail h3 { font-size: 24px; font-weight: 800; margin-bottom: 12px; }
.products .product-detail .product-desc { color: var(--text-light); font-size: 15px; line-height: 1.8; margin-bottom: 20px; }
.products .product-tags { display: flex; flex-wrap: wrap; gap: 10px; list-style: none; }
.products .product-tags li {
  background: rgba(0,188,212,0.08); color: var(--primary-dark);
  padding: 6px 16px; border-radius: 20px; font-size: 13px; font-weight: 500;
}

/* ===== 解决方案 ===== */
.solutions { padding: 80px 0; background: var(--gray); }
.solutions .solution-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.solutions .solution-card { background: white; border-radius: var(--radius); padding: 36px; box-shadow: var(--shadow); transition: all 0.3s; }
.solutions .solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.solutions .solution-icon { font-size: 40px; margin-bottom: 16px; }
.solutions .solution-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.solutions .solution-card p { color: var(--text-light); font-size: 14px; line-height: 1.8; }

/* ===== 核心优势 ===== */
.advantages { padding: 80px 0; background: white; }
.advantages .advantage-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.advantages .advantage-card {
  background: white; border: 1px solid var(--gray-2); border-radius: var(--radius);
  padding: 32px; transition: all 0.3s; position: relative; overflow: hidden;
}
.advantages .advantage-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  transform: scaleX(0); transition: transform 0.3s;
}
.advantages .advantage-card:hover { border-color: transparent; box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.advantages .advantage-card:hover::before { transform: scaleX(1); }
.advantages .adv-icon {
  width: 56px; height: 56px; border-radius: 14px;
  background: linear-gradient(135deg, rgba(0,188,212,0.1), rgba(77,208,225,0.1));
  display: flex; align-items: center; justify-content: center; font-size: 28px; margin-bottom: 20px;
}
.advantages .advantage-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.advantages .advantage-card p { color: var(--text-light); font-size: 14px; line-height: 1.8; }

/* ===== 关于我们 ===== */
.about { padding: 80px 0; background: var(--gray); }
.about .about-content { display: flex; gap: 60px; align-items: center; }
.about .about-text { flex: 1; }
.about .about-text .badge { display: inline-block; background: var(--primary); color: white; padding: 4px 14px; border-radius: 20px; font-size: 12px; margin-bottom: 16px; }
.about .about-text h2 { font-size: 36px; font-weight: 800; margin-bottom: 20px; }
.about .about-text p { color: var(--text-light); font-size: 15px; line-height: 1.8; margin-bottom: 16px; }
.about .about-text .btn-primary { margin-top: 20px; }
.about .about-stats { flex: 0 0 200px; display: flex; flex-direction: column; gap: 30px; }
.about .about-stat { text-align: center; background: white; border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.about .about-stat .num { font-size: 36px; font-weight: 800; color: var(--primary); }
.about .about-stat .label { font-size: 14px; color: var(--text-light); }

/* ===== CTA 区 ===== */
.cta {
  padding: 80px 0; background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 100%);
  text-align: center; position: relative; overflow: hidden;
}
.cta::before {
  content: ''; position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(0,188,212,0.1) 0%, transparent 60%);
  border-radius: 50%;
}
.cta .container { position: relative; z-index: 2; }
.cta h2 { color: white; font-size: 36px; font-weight: 800; margin-bottom: 16px; }
.cta p { color: rgba(255,255,255,0.7); font-size: 18px; margin-bottom: 32px; }
.cta .btn-primary {
  display: inline-block; background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white; padding: 16px 48px; border-radius: 8px; font-size: 18px; font-weight: 600; transition: all 0.3s;
}
.cta .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 40px rgba(0,188,212,0.4); }

/* ===== 页脚 ===== */
.footer { background: var(--dark); padding: 60px 0 0; }
.footer .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer .footer-col h4 { color: white; font-size: 16px; margin-bottom: 20px; }
.footer .footer-col p { color: rgba(255,255,255,0.5); font-size: 14px; line-height: 1.8; margin-bottom: 16px; }
.footer .footer-col ul { list-style: none; }
.footer .footer-col ul li { margin-bottom: 10px; }
.footer .footer-col ul a { color: rgba(255,255,255,0.5); font-size: 14px; transition: color 0.2s; }
.footer .footer-col ul a:hover { color: white; }
.footer .footer-col .contact-item { display: flex; align-items: center; gap: 10px; color: rgba(255,255,255,0.5); font-size: 14px; margin-bottom: 12px; }
.footer .footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; text-align: center; }
.footer .footer-bottom p { color: rgba(255,255,255,0.4); font-size: 13px; }
.footer .footer-bottom .icp { color: rgba(255,255,255,0.3); font-size: 12px; margin-top: 4px; }

/* ===== 滚动动画 ===== */
.fade-in { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== 响应式 ===== */
@media (max-width: 968px) {
  .navbar .nav-links { display: none; }
  .navbar .mobile-menu-btn { display: block; }
  .hero .container { flex-direction: column; text-align: center; }
  .hero .hero-content { order: 2; }
  .hero .hero-visual { order: 1; }
  .hero h1 { font-size: 36px; }
  .hero .hero-sub { font-size: 16px; }
  .hero .hero-actions { justify-content: center; }
  .hero .hero-cards { grid-template-columns: repeat(2, 1fr); }
  .products .product-item, .products .product-item.reverse { flex-direction: column; }
  .products .product-visual { flex: none; width: 100%; }
  .solutions .solution-grid { grid-template-columns: 1fr; }
  .advantages .advantage-grid { grid-template-columns: 1fr; }
  .about .about-content { flex-direction: column; }
  .about .about-stats { flex: none; flex-direction: row; justify-content: space-around; }
  .footer .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .stats .stat-item .num { font-size: 32px; }
}