:root {
  --primary: #1358c8;
  --primary-deep: #0b3f9c;
  --accent: #20b8ff;
  --ink: #111827;
  --muted: #5f6b85;
  --line: #dfe7f5;
  --surface: #f5f8ff;
  --white: #ffffff;
  --shadow: 0 20px 50px rgba(17, 36, 76, 0.12);
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: #eef4ff;
  line-height: 1.65;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.section {
  padding: 88px 0;
}

.section-kicker {
  margin: 0 0 12px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section-heading {
  text-align: center;
  margin-bottom: 42px;
}

.section-heading h2,
.about-copy h2,
.contact-box h2,
.brands-header h2 {
  margin: 0 0 12px;
  font-size: clamp(30px, 3vw, 42px);
  line-height: 1.2;
}

.section-heading p,
.about-copy p,
.contact-box p,
.hero-lead,
.product-card p,
.advantage-item p,
.application-card p,
.news-card p {
  margin: 0;
  color: var(--muted);
}

.topbar {
  background: linear-gradient(90deg, #0a2b70, #0c4ec2);
  color: rgba(255, 255, 255, 0.92);
  font-size: 13px;
}

.topbar-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
}

.topbar-inner p {
  margin: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 12px 32px rgba(33, 56, 110, 0.08);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  color: var(--white);
  font-weight: 800;
  letter-spacing: 0.08em;
  box-shadow: 0 14px 30px rgba(19, 88, 200, 0.24);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand-text strong {
  font-size: 20px;
}

.brand-text em {
  font-style: normal;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 22px;
  font-size: 15px;
  font-weight: 600;
}

.main-nav a {
  position: relative;
  padding-bottom: 2px;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.25s ease;
}

.main-nav a:hover::after {
  transform: scaleX(1);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 0 84px;
  background:
    radial-gradient(circle at right top, rgba(32, 184, 255, 0.28), transparent 24%),
    radial-gradient(circle at left bottom, rgba(19, 88, 200, 0.16), transparent 24%),
    linear-gradient(135deg, #f7fbff 0%, #edf4ff 50%, #dce8ff 100%);
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(10px);
}

.hero::before {
  width: 260px;
  height: 260px;
  right: -60px;
  top: 30px;
  background: rgba(32, 184, 255, 0.16);
}

.hero::after {
  width: 320px;
  height: 320px;
  left: -100px;
  bottom: -120px;
  background: rgba(19, 88, 200, 0.14);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 44px;
  align-items: center;
}

.hero-copy h1 {
  margin: 0 0 22px;
  font-size: clamp(40px, 5vw, 66px);
  line-height: 1.06;
}

.hero-lead {
  max-width: 640px;
  font-size: 17px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin: 30px 0 26px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 148px;
  padding: 14px 22px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: var(--white);
  background: linear-gradient(135deg, var(--primary), #2e7bff);
  box-shadow: 0 16px 30px rgba(19, 88, 200, 0.28);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(19, 88, 200, 0.15);
}

.hero-points {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-points li {
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--primary-deep);
  border: 1px solid rgba(19, 88, 200, 0.12);
  font-size: 14px;
  font-weight: 700;
}

.hero-visual {
  position: relative;
  min-height: 500px;
}

.disk {
  position: absolute;
  border-radius: 28px;
  box-shadow: var(--shadow);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(230, 239, 255, 0.94)),
    linear-gradient(135deg, rgba(16, 56, 140, 0.4), rgba(32, 184, 255, 0.2));
  border: 1px solid rgba(255, 255, 255, 0.8);
}

.disk::before,
.disk::after {
  content: "";
  position: absolute;
  border-radius: 50%;
}

.disk::before {
  width: 94px;
  height: 94px;
  top: 52px;
  left: 50%;
  transform: translateX(-50%);
  border: 12px solid #d4dceb;
  background: radial-gradient(circle, #ffffff 30%, #b9c6da 31%, #eef4ff 60%, #d1d9e8 100%);
}

.disk::after {
  width: 18px;
  height: 18px;
  top: 90px;
  left: 50%;
  transform: translateX(-50%);
  background: #a0b0c9;
}

.disk-a {
  inset: 34px 24px 120px 70px;
  transform: rotate(-8deg);
}

.disk-b {
  inset: 120px 80px 20px 30px;
  transform: rotate(7deg);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.96), rgba(238, 245, 255, 0.96)),
    linear-gradient(135deg, rgba(9, 44, 112, 0.32), rgba(40, 136, 255, 0.18));
}

.data-panel {
  position: absolute;
  right: 0;
  bottom: 56px;
  width: 250px;
  padding: 24px;
  border-radius: 24px;
  color: var(--white);
  background: linear-gradient(135deg, #07255f, #145bcb 70%, #1aa5ff);
  box-shadow: 0 24px 60px rgba(9, 44, 112, 0.34);
}

.data-panel span,
.data-panel small {
  display: block;
}

.data-panel span {
  opacity: 0.8;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.data-panel strong {
  display: block;
  margin: 10px 0 8px;
  font-size: 30px;
  line-height: 1.15;
}

.data-panel small {
  color: rgba(255, 255, 255, 0.82);
}

.brands {
  padding: 34px 0 30px;
  background: var(--white);
  border-bottom: 1px solid rgba(19, 88, 200, 0.08);
}

.brands-header {
  text-align: center;
  margin-bottom: 22px;
}

.brand-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.brand-list span {
  display: grid;
  place-items: center;
  min-height: 86px;
  border-radius: 18px;
  background: linear-gradient(180deg, #f9fbff, #eef4ff);
  border: 1px solid var(--line);
  font-size: 20px;
  font-weight: 700;
  color: #24448f;
}

.products {
  background: linear-gradient(180deg, #f7faff, #eef4ff);
}

.product-grid,
.advantage-grid,
.application-grid,
.news-grid {
  display: grid;
  gap: 24px;
}

.product-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card,
.advantage-item,
.application-card,
.news-card,
.contact-box {
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(19, 88, 200, 0.08);
  box-shadow: var(--shadow);
}

.product-card {
  padding: 30px;
}

.icon-circle {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  border-radius: 50%;
  color: var(--white);
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
}

.product-card h3,
.advantage-item h3,
.application-card h3,
.news-card h3 {
  margin: 0 0 12px;
  font-size: 22px;
  line-height: 1.3;
}

.advantage-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.advantage-item {
  padding: 28px;
  min-height: 220px;
  background:
    linear-gradient(180deg, rgba(11, 63, 156, 0.98), rgba(19, 88, 200, 0.9)),
    var(--white);
  color: var(--white);
}

.advantage-item p {
  color: rgba(255, 255, 255, 0.82);
}

.about {
  background:
    radial-gradient(circle at left top, rgba(32, 184, 255, 0.12), transparent 22%),
    linear-gradient(180deg, #ffffff, #f6f9ff);
}

.about-grid {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 34px;
  align-items: center;
}

.about-image {
  min-height: 470px;
  border-radius: 32px;
  background:
    linear-gradient(145deg, rgba(9, 44, 112, 0.9), rgba(23, 108, 230, 0.72)),
    linear-gradient(180deg, #d8e5ff, #f9fbff);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.about-image::before,
.about-image::after,
.about-frame::before,
.about-frame::after {
  content: "";
  position: absolute;
  border-radius: 24px;
}

.about-image::before {
  width: 250px;
  height: 150px;
  left: 48px;
  top: 88px;
  transform: rotate(-8deg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(227, 238, 255, 0.92));
  box-shadow: 0 18px 45px rgba(7, 37, 95, 0.24);
}

.about-image::after {
  width: 250px;
  height: 150px;
  right: 46px;
  bottom: 86px;
  transform: rotate(9deg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(227, 238, 255, 0.92));
  box-shadow: 0 18px 45px rgba(7, 37, 95, 0.24);
}

.about-frame {
  position: absolute;
  inset: 0;
}

.about-frame::before {
  width: 160px;
  height: 160px;
  left: 50%;
  top: 52%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 18px solid rgba(255, 255, 255, 0.76);
  background: rgba(255, 255, 255, 0.2);
}

.about-frame::after {
  width: 30px;
  height: 30px;
  left: 50%;
  top: 52%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
}

.about-copy {
  padding: 10px 0;
}

.about-copy p + p {
  margin-top: 16px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 30px;
}

.stats div {
  padding: 22px 20px;
  border-radius: 20px;
  background: rgba(19, 88, 200, 0.06);
  border: 1px solid rgba(19, 88, 200, 0.08);
}

.stats strong {
  display: block;
  font-size: 34px;
  color: var(--primary);
}

.stats span {
  color: var(--muted);
  font-weight: 600;
}

.applications {
  background: linear-gradient(180deg, #eef4ff, #f7faff);
}

.application-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.application-card {
  padding: 28px;
  min-height: 184px;
  position: relative;
  overflow: hidden;
}

.application-card::after {
  content: "";
  position: absolute;
  width: 96px;
  height: 96px;
  right: -20px;
  bottom: -20px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(19, 88, 200, 0.14), transparent 70%);
}

.news {
  background: #ffffff;
}

.news-grid {
  grid-template-columns: 1.2fr 1fr 1fr;
}

.news-card {
  padding: 28px;
  min-height: 280px;
}

.news-card.featured {
  background:
    linear-gradient(135deg, rgba(7, 37, 95, 0.98), rgba(19, 88, 200, 0.95)),
    var(--white);
  color: var(--white);
}

.news-card.featured p,
.news-card.featured a,
.news-card.featured .news-tag {
  color: rgba(255, 255, 255, 0.88);
}

.news-tag {
  display: inline-flex;
  margin-bottom: 18px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(19, 88, 200, 0.08);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
}

.news-card a {
  display: inline-block;
  margin-top: 22px;
  color: var(--primary);
  font-weight: 700;
}

.contact {
  padding-bottom: 100px;
  background: linear-gradient(180deg, #ffffff, #edf4ff);
}

.contact-box {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  padding: 40px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(241, 246, 255, 0.98)),
    var(--white);
}

.contact-details {
  padding: 28px;
  border-radius: 24px;
  color: var(--white);
  background: linear-gradient(135deg, #0c3d98, #1670f4);
}

.contact-details p {
  margin: 0 0 12px;
  color: rgba(255, 255, 255, 0.88);
}

.site-footer {
  background: #081e4d;
  color: rgba(255, 255, 255, 0.78);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 0;
  font-size: 14px;
}

.footer-inner p {
  margin: 0;
}

@media (max-width: 1080px) {
  .hero-grid,
  .about-grid,
  .contact-box,
  .news-grid {
    grid-template-columns: 1fr;
  }

  .product-grid,
  .advantage-grid,
  .application-grid,
  .brand-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-visual {
    min-height: 420px;
  }
}

@media (max-width: 820px) {
  .topbar {
    display: none;
  }

  .site-header {
    position: static;
  }

  .nav-wrap {
    flex-direction: column;
    align-items: flex-start;
  }

  .main-nav {
    justify-content: flex-start;
    gap: 14px 18px;
  }

  .section,
  .hero {
    padding: 72px 0;
  }

  .product-grid,
  .advantage-grid,
  .application-grid,
  .news-grid,
  .brand-list,
  .stats {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 360px;
  }

  .disk-a {
    inset: 20px 30px 110px 50px;
  }

  .disk-b {
    inset: 92px 50px 0 20px;
  }

  .data-panel {
    position: relative;
    width: auto;
    margin: 250px 12px 0;
    right: auto;
    bottom: auto;
  }

  .contact-box {
    padding: 28px;
  }

  .footer-inner {
    flex-direction: column;
  }
}