* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
:root {
  --bg-dark: #0b101f;
  --bg-card: #121a2e;
  --bg-light: #151d32;
  --primary: #36c9f5;
  --secondary: #1d72f3;
  --text: #e9edf7;
  --text-soft: #9cb8e7;
  --border: rgba(54, 201, 245, 0.15);
}

/* 全屏高科技动态光点背景 blingbling */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background:
  radial-gradient(circle at 20% 30%, rgba(54,201,245,0.07), transparent 25%),
  radial-gradient(circle at 80% 70%, rgba(29,114,243,0.07), transparent 25%);
  animation: bg-float 20s linear infinite;
  z-index: -2;
}
body::after {
  content: '';
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background:
  radial-gradient(circle at 40% 60%, rgba(54,201,245,0.04), transparent 18%),
  radial-gradient(circle at 60% 20%, rgba(29,114,243,0.04), transparent 18%);
  animation: bg-float-rev 26s linear infinite;
  z-index: -3;
}
@keyframes bg-float {
  0% { transform: translate(0,0) scale(1); }
  50% { transform: translate(20px,-20px) scale(1.05); }
  100% { transform: translate(0,0) scale(1); }
}
@keyframes bg-float-rev {
  0% { transform: translate(0,0) scale(1); }
  50% { transform: translate(-20px,20px) scale(1.05); }
  100% { transform: translate(0,0) scale(1); }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--bg-dark);
  color: var(--text);
  line-height: 1.75;
  overflow-x: hidden;
  position: relative;
}

/* 流光扫过按钮/卡片边框效果 */
.adv-card::before,
.biz-item:hover,
.product-img {
  position: relative;
  overflow: hidden;
}
.adv-card::after,
.biz-item::after,
.product-img::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(54,201,245,0.08), transparent);
  animation: light-sweep 8s infinite linear;
  z-index: 1;
}
@keyframes light-sweep {
  0% { left: -100%; }
  50% { left: 100%; }
  100% { left: 100%; }
}

.container {
  width: 92%;
  max-width: 1200px;
  margin: 0 auto;
  position: relative; z-index: 2;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { width: 100%; display: block; border-radius: 12px; object-fit: cover; }

/* 导航 */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  background: rgba(11, 16, 31, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 999;
}
.nav {
  height: 72px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  font-size: 20px;
  font-weight: 600;
  color: var(--primary);
}
.menu {
  display: flex;
  gap: 42px;
}
.menu a {
  font-size: 15px;
  color: var(--text-soft);
  transition: 0.25s ease;
}
.menu a:hover {
  color: var(--primary);
}
.hamburger { display: none; font-size: 22px; }

/* 首屏 */
.hero {
  padding: 180px 0 110px;
  text-align: center;
  background: radial-gradient(circle at top right, rgba(29, 114, 243, 0.12), transparent 60%),
              radial-gradient(circle at bottom left, rgba(54, 201, 245, 0.08), transparent 60%);
  position: relative; z-index: 2;
}
.hero h1 {
  font-size: 48px;
  font-weight: 500;
  margin-bottom: 20px;
  background: linear-gradient(90deg, #fff, var(--primary));
  -webkit-background-clip: text;
  color: transparent;
  animation: text-glow 4s infinite alternate;
}
@keyframes text-glow {
  0% { filter: brightness(1); }
  100% { filter: brightness(1.15); }
}
.hero p {
  font-size: 18px;
  color: var(--text-soft);
  max-width: 680px;
  margin: 0 auto;
}

/* 标题 */
.section { padding: 100px 0; position: relative; z-index: 2; }
.section-title {
  font-size: 32px;
  font-weight: 500;
  text-align: center;
  margin-bottom: 55px;
}
.title-gradient {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  color: transparent;
  animation: text-glow 4s infinite alternate;
}

/* 关于我们 */
.about-row {
  display: flex;
  gap: 60px;
  align-items: center;
}
.about-text { flex: 1; }
.about-text h3 {
  font-size: 26px;
  margin-bottom: 20px;
  font-weight: 500;
}
.about-text p {
  color: var(--text-soft);
  margin-bottom: 14px;
}
.about-img { flex: 1; }

/* 核心业务 —— 大图大卡片 */
.business-section {
  background: var(--bg-light);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.biz-item {
  display: flex;
  align-items: center;
  gap: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 40px;
  margin-bottom: 30px;
  transition: 0.3s;
  position: relative;
  overflow: hidden;
}
.biz-item:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
}
.biz-img {
  width: 240px;
  height: 160px;
  flex-shrink: 0;
}
.biz-content h3 {
  font-size: 24px;
  color: var(--primary);
  margin-bottom: 12px;
}
.biz-content p {
  color: var(--text-soft);
  font-size: 16px;
  line-height: 1.8;
}

/* 元来有伴 —— 旗舰产品 + 大图科技感 */
.product-section {
  background: linear-gradient(135deg, #10182b, #0c1222);
  padding: 100px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  position: relative; z-index: 2;
}
.product-wrap {
  display: flex;
  align-items: center;
  gap: 50px;
  max-width: 1000px;
  margin: 0 auto;
}
.product-img {
  flex: 1;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(54,201,245,0.15);
  animation: img-pulse 6s infinite alternate;
  position: relative;
}
@keyframes img-pulse {
  0% { box-shadow: 0 10px 40px rgba(54,201,245,0.15); }
  100% { box-shadow: 0 15px 50px rgba(54,201,245,0.25); }
}
.product-content {
  flex: 1;
}
.product-content h2 {
  font-size: 36px;
  color: var(--primary);
  margin-bottom: 22px;
  animation: text-glow 4s infinite alternate;
}
.product-content p {
  font-size: 17px;
  color: var(--text-soft);
  line-height: 1.9;
  margin-bottom: 14px;
}

/* 核心优势 —— 高端排版 */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.adv-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 50px 36px;
  text-align: center;
  transition: 0.3s;
  overflow: hidden;
}
.adv-card::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 50px; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 0 0 4px 4px;
  animation: top-light 3s infinite alternate;
}
@keyframes top-light {
  0% { opacity: 0.6; }
  100% { opacity: 1; }
}
.adv-card:hover {
  border-color: var(--primary);
  transform: translateY(-6px);
}
.adv-card h4 {
  font-size: 20px;
  color: var(--primary);
  margin-bottom: 16px;
}
.adv-card p {
  color: var(--text-soft);
  line-height: 1.8;
}

/* 联系我们 */
.contact-box {
  max-width: 720px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 55px 45px;
  font-size: 16px;
  line-height: 2.3;
  color: var(--text-soft);
  position: relative; z-index: 2;
}
.contact-box strong {
  color: var(--text);
  font-weight: 500;
}

/* 页脚 */
footer {
  background: #080c18;
  padding: 35px 0;
  text-align: center;
  font-size: 14px;
  color: var(--text-soft);
  border-top: 1px solid var(--border);
  position: relative; z-index: 2;
}

/* 自适应 */
@media (max-width: 992px) {
  .about-row, .product-wrap { flex-direction: column; gap: 40px; }
  .biz-item { flex-direction: column; padding: 30px; }
  .biz-img { width: 100%; height: auto; }
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .menu { display: none; }
  .hamburger { display: block; }
  .hero h1 { font-size: 34px; }
  .advantage-grid { grid-template-columns: 1fr; }
}