:root {
  --blue: #1677ff;
  --deep-blue: #0b56d9;
  --ink: #102a43;
  --muted: #5d7387;
  --pale: #f5faff;
  --line: #ddebf7;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: #fff; font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif; }
a { color: inherit; text-decoration: none; }
main { overflow: hidden; }

.site-header { height: 78px; max-width: 1440px; margin: 0 auto; padding: 0 40px; display: flex; align-items: center; justify-content: space-between; gap: 36px; background: rgba(255,255,255,.95); }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { width: 48px; height: 48px; border-radius: 14px 5px 14px 5px; display: grid; place-items: center; color: white; font-size: 15px; font-weight: 800; letter-spacing: .7px; background: linear-gradient(135deg, #0b56d9, #39b6ff); box-shadow: 0 8px 20px rgba(22,119,255,.2); }
.brand strong { display: block; font-size: 17px; letter-spacing: 1.5px; }
.brand small { display: block; color: #88a0b5; font-size: 8px; letter-spacing: 1.8px; margin-top: 3px; }
nav { display: flex; align-items: center; gap: 38px; font-size: 14px; color: #405b72; }
nav a { position: relative; padding: 28px 0; }
nav a::after { content: ""; position: absolute; left: 50%; right: 50%; bottom: 17px; height: 2px; background: var(--blue); transition: .25s; }
nav a:hover::after { left: 0; right: 0; }
.header-cta { padding: 12px 19px; border: 1px solid #cfe4f6; border-radius: 8px; color: var(--deep-blue); font-size: 13px; font-weight: 700; }

.hero { min-height: 650px; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(480px, .95fr); background: linear-gradient(105deg, #fff 0%, #f7fbff 48%, #e8f5ff 100%); }
.hero-copy { padding: 76px max(50px, calc((100vw - 1360px) / 2)); padding-right: 36px; }
.eyebrow { margin: 0 0 20px; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: 3px; display: flex; align-items: center; gap: 10px; }
.eyebrow span { display: inline-block; width: 26px; height: 2px; background: currentColor; }
h1 { margin: 0; font-size: clamp(48px, 5vw, 74px); line-height: 1.12; letter-spacing: -3px; font-weight: 800; }
h1 em { color: var(--blue); font-style: normal; }
.hero-lead { max-width: 690px; margin: 28px 0 0; font-size: 19px; line-height: 1.9; color: var(--muted); }
.hero-actions { display: flex; gap: 16px; margin: 34px 0 42px; }
.primary-button, .secondary-button { display: inline-flex; align-items: center; justify-content: center; min-width: 170px; padding: 15px 24px; border-radius: 10px; font-size: 15px; font-weight: 700; transition: .25s; }
.primary-button { color: white; background: linear-gradient(135deg, var(--blue), var(--deep-blue)); box-shadow: 0 12px 26px rgba(22,119,255,.23); }
.primary-button span { margin-left: 18px; font-size: 20px; }
.secondary-button { border: 1px solid #cbdff0; background: white; color: #274c69; }
.primary-button:hover, .secondary-button:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(22,119,255,.2); }
.hero-stats { display: flex; align-items: stretch; gap: 0; }
.hero-stats div { padding: 0 36px; border-left: 1px solid #d7e6f2; }
.hero-stats div:first-child { padding-left: 0; border-left: 0; }
.hero-stats strong { display: block; font-size: 27px; color: #123d61; }
.hero-stats sup { color: var(--blue); font-size: 15px; }
.hero-stats span { display: block; margin-top: 7px; color: #7890a3; font-size: 12px; }

.network-visual { position: relative; min-height: 650px; overflow: hidden; }
.network-grid { position: absolute; inset: 0; opacity: .32; background-image: linear-gradient(rgba(22,119,255,.13) 1px, transparent 1px), linear-gradient(90deg, rgba(22,119,255,.13) 1px, transparent 1px); background-size: 54px 54px; mask-image: radial-gradient(circle at center, #000, transparent 76%); }
.orbit { position: absolute; border: 1px solid rgba(22,119,255,.18); border-radius: 50%; left: 50%; top: 50%; transform: translate(-50%, -50%) rotate(-12deg); }
.orbit-one { width: 510px; height: 310px; }
.orbit-two { width: 660px; height: 430px; }
.service-core { position: absolute; left: 50%; top: 50%; width: 180px; height: 180px; transform: translate(-50%, -50%) rotate(45deg); display: grid; place-content: center; text-align: center; color: white; border-radius: 48px; background: linear-gradient(135deg, #5ba8ff, #76d4f3); box-shadow: 0 30px 60px rgba(22,119,255,.2); }
.service-core strong, .service-core span { transform: rotate(-45deg); }
.service-core strong { font-size: 30px; }
.service-core span { font-size: 21px; font-weight: 700; margin-top: -22px; }
.node { position: absolute; width: 122px; height: 100px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 9px; border: 1px solid rgba(255,255,255,.8); border-radius: 24px; background: rgba(255,255,255,.66); backdrop-filter: blur(14px); color: #6c91ad; box-shadow: 0 18px 50px rgba(29,93,140,.1); animation: float 4.2s ease-in-out infinite; }
.node b { color: var(--blue); font-size: 25px; }
.node span { font-size: 13px; font-weight: 700; }
.node-one { left: 13%; top: 16%; }
.node-two { right: 5%; top: 18%; animation-delay: -1s; }
.node-three { right: 2%; bottom: 14%; animation-delay: -2s; }
.node-four { left: 20%; bottom: 12%; animation-delay: -3s; }
@keyframes float { 50% { transform: translateY(-9px); } }

.section { max-width: 1440px; margin: 0 auto; padding: 100px 40px; }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; margin-bottom: 48px; }
.section-heading h2, .about h2, .contact h2 { margin: 0; font-size: clamp(34px, 3.4vw, 50px); line-height: 1.25; letter-spacing: -1.5px; }
.section-heading > p { color: #7890a3; font-size: 15px; }
.service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.service-card { position: relative; min-height: 390px; padding: 34px 28px; border: 1px solid var(--line); border-radius: 18px; background: white; box-shadow: 0 12px 40px rgba(44,90,126,.06); transition: .3s; overflow: hidden; }
.service-card::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 4px; background: var(--accent); transform: scaleX(0); transition: .3s; transform-origin: left; }
.service-card:hover { transform: translateY(-6px); box-shadow: 0 22px 55px rgba(44,90,126,.13); }
.service-card:hover::after { transform: scaleX(1); }
.service-card.blue { --accent: #1677ff; --soft: #e9f3ff; }
.service-card.cyan { --accent: #1098ad; --soft: #e7f9fb; }
.service-card.orange { --accent: #e98a1c; --soft: #fff3e3; }
.service-card.red { --accent: #e35d5d; --soft: #fff0f0; }
.card-code { position: absolute; right: 20px; top: 18px; font-size: 50px; font-weight: 800; color: #edf4fa; }
.card-icon { position: relative; width: 56px; height: 56px; border-radius: 15px; display: grid; place-items: center; margin-bottom: 28px; background: var(--soft); color: var(--accent); font-size: 27px; font-weight: 800; }
.service-card h3 { margin: 0 0 16px; font-size: 21px; }
.service-card p { color: var(--muted); font-size: 14px; line-height: 1.85; }
.service-card ul { padding: 0; margin: 24px 0 0; list-style: none; display: grid; gap: 10px; font-size: 13px; color: #4a657a; }
.service-card li::before { content: ""; display: inline-block; width: 5px; height: 5px; margin: 0 10px 2px 0; border-radius: 50%; background: var(--accent); }

.about { max-width: none; padding: 0 40px 100px; }
.about-panel { max-width: 1360px; margin: 0 auto; display: grid; grid-template-columns: 1.05fr .95fr; gap: 70px; padding: 76px; border-radius: 30px; color: white; background: linear-gradient(120deg, #0d3a6b, #0e5da8); position: relative; overflow: hidden; }
.about-panel::after { content: ""; position: absolute; width: 460px; height: 460px; border-radius: 50%; right: -130px; top: -180px; border: 80px solid rgba(255,255,255,.04); }
.eyebrow.light { color: #8edcff; }
.about-copy > p:not(.eyebrow) { max-width: 640px; color: #c7dded; font-size: 16px; line-height: 1.9; }
.values { display: flex; gap: 10px; margin-top: 28px; }
.values span { padding: 8px 16px; border: 1px solid rgba(255,255,255,.18); border-radius: 999px; color: #d9ecf9; font-size: 13px; }
.about-capabilities { display: grid; gap: 15px; position: relative; z-index: 1; }
.about-capabilities div { position: relative; padding: 24px 24px 24px 76px; border: 1px solid rgba(255,255,255,.12); border-radius: 16px; background: rgba(255,255,255,.07); }
.about-capabilities span { position: absolute; left: 22px; top: 25px; color: #80d6ff; font-weight: 800; }
.about-capabilities strong { font-size: 17px; }
.about-capabilities p { margin: 7px 0 0; color: #bcd6e8; font-size: 13px; }

.section-heading.centered { justify-content: center; text-align: center; }
.section-heading.centered .eyebrow { justify-content: center; }
.process-line { display: grid; grid-template-columns: repeat(5, 1fr); margin-bottom: 60px; }
.process-line div { position: relative; text-align: center; }
.process-line span { width: 42px; height: 42px; margin: 0 auto 13px; border-radius: 50%; display: grid; place-items: center; color: var(--blue); background: #edf6ff; border: 1px solid #d7eaff; font-size: 12px; font-weight: 800; }
.process-line strong { font-size: 14px; }
.process-line i { position: absolute; top: 21px; left: calc(50% + 30px); width: calc(100% - 60px); height: 1px; background: #dceaf5; }
.process-line div:last-child i { display: none; }
.advantage-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.advantage-grid article { padding: 29px; border-radius: 16px; background: var(--pale); border: 1px solid #e6f0f7; }
.advantage-grid b { color: var(--blue); font-size: 24px; }
.advantage-grid h3 { margin: 22px 0 8px; font-size: 17px; }
.advantage-grid p { margin: 0; color: var(--muted); line-height: 1.75; font-size: 13px; }

.qualifications { padding-top: 80px; }
.certificate-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.certificate-grid figure { margin: 0; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; background: #fff; }
.certificate-image { height: 310px; padding: 18px; background: #f6f9fc; overflow: hidden; }
.certificate-image img { width: 100%; height: 100%; object-fit: contain; transition: transform .35s; }
.certificate-grid figure:hover img { transform: scale(1.035); }
.certificate-grid figcaption { padding: 20px; display: flex; justify-content: space-between; gap: 10px; align-items: center; }
.certificate-grid figcaption strong { font-size: 14px; }
.certificate-grid figcaption span { color: var(--blue); font-size: 11px; font-weight: 800; }
.copyrights { margin-top: 30px; display: grid; grid-template-columns: 250px 1fr; gap: 35px; align-items: center; padding: 28px 34px; border-radius: 16px; color: white; background: linear-gradient(120deg, #0d3a6b, #0e5da8); }
.copyrights > div strong { display: block; font-size: 20px; }
.copyrights > div span { display: block; margin-top: 6px; color: #a9cde7; font-size: 12px; }
.copyrights ul { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px 30px; padding: 0; margin: 0; list-style: none; font-size: 13px; color: #d7ebf8; }
.copyrights li span { color: #6ee0cb; margin-right: 9px; }

.contact { max-width: 1360px; margin: 30px auto 0; padding: 56px 62px; border-radius: 24px 24px 0 0; color: white; background: linear-gradient(120deg, var(--blue), #0b56d9); display: flex; justify-content: space-between; align-items: center; gap: 30px; }
.contact p { margin: 0 0 8px; color: #cfe8ff; }
.contact a { flex: 0 0 auto; padding: 16px 24px; border: 1px solid rgba(255,255,255,.36); border-radius: 10px; font-weight: 700; }
.contact a span { margin-left: 20px; }
footer { padding: 50px max(40px, calc((100vw - 1360px) / 2)); display: flex; justify-content: space-between; gap: 50px; align-items: center; color: #9ab0c1; background: #071c2e; }
.footer-brand { display: flex; align-items: center; gap: 16px; }
.footer-brand strong { color: white; }
.footer-brand p, .footer-info p { margin: 5px 0; font-size: 12px; }
.footer-info { text-align: right; }

@media (max-width: 1050px) {
  nav { display: none; }
  .hero { grid-template-columns: 1fr; }
  .hero-copy { padding: 64px 40px 34px; }
  .network-visual { min-height: 480px; }
  .service-grid, .advantage-grid, .certificate-grid { grid-template-columns: repeat(2, 1fr); }
  .about-panel { grid-template-columns: 1fr; padding: 55px; }
}

@media (max-width: 650px) {
  .site-header { padding: 0 20px; }
  .brand small, .header-cta { display: none; }
  .hero-copy { padding: 52px 22px 26px; }
  h1 { font-size: 43px; letter-spacing: -2px; }
  .hero-lead { font-size: 16px; }
  .hero-actions { flex-direction: column; }
  .hero-stats div { padding: 0 14px; }
  .hero-stats strong { font-size: 21px; }
  .network-visual { min-height: 400px; transform: scale(.86); margin: -20px; }
  .section { padding: 72px 20px; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .service-grid, .advantage-grid, .certificate-grid { grid-template-columns: 1fr; }
  .about { padding: 0 20px 72px; }
  .about-panel { padding: 38px 24px; }
  .values { flex-wrap: wrap; }
  .process-line { grid-template-columns: 1fr; gap: 18px; }
  .process-line div { display: flex; align-items: center; gap: 14px; text-align: left; }
  .process-line span { margin: 0; }
  .process-line i { left: 21px; top: 42px; width: 1px; height: 26px; }
  .copyrights { grid-template-columns: 1fr; }
  .copyrights ul { grid-template-columns: 1fr; }
  .contact { margin: 0 20px; padding: 40px 24px; flex-direction: column; align-items: flex-start; border-radius: 20px 20px 0 0; }
  footer { flex-direction: column; align-items: flex-start; padding: 42px 22px; }
  .footer-info { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}