:root {
  --ink: #0a2442;
  --ink-soft: #173b61;
  --paper: #f5f8fc;
  --white: #ffffff;
  --blue: #2878e8;
  --sky: #dcecff;
  --mint: #8eead8;
  --line: rgba(10, 36, 66, 0.14);
  --muted: #63788e;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: linear-gradient(180deg, #fbfdff 0%, #f1f6fb 100%);
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Segoe UI", Arial, sans-serif;
  font-weight: 400;
  letter-spacing: 0.01em;
}

.noise {
  position: fixed;
  inset: 0;
  z-index: 99;
  pointer-events: none;
  opacity: 0.014;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.8'/%3E%3C/svg%3E");
}

.site-header {
  position: absolute;
  inset: 0 0 auto;
  z-index: 20;
  height: 86px;
  padding: 0 5vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.brand { display: flex; align-items: center; gap: 12px; color: inherit; text-decoration: none; }
.brand-mark { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid currentColor; border-radius: 50%; font-size: 12px; font-weight: 800; }
.brand-copy { display: flex; flex-direction: column; line-height: 1.05; }
.brand-copy strong { font-size: 15px; font-weight: 700; letter-spacing: 0.08em; }
.brand-copy small { margin-top: 6px; font-size: 8px; letter-spacing: 0.2em; opacity: 0.66; }
.site-header nav { display: flex; gap: 36px; }
.site-header nav a, .header-cta { color: #fff; font-size: 13px; text-decoration: none; }
.site-header nav a { opacity: 0.72; transition: opacity 0.2s; }
.site-header nav a:hover { opacity: 1; }
.header-cta { padding: 12px 18px; display: flex; gap: 22px; border: 1px solid rgba(255, 255, 255, 0.45); border-radius: 30px; }
.menu-button { display: none; background: none; border: 0; }

.hero {
  position: relative;
  min-height: 760px;
  height: 100vh;
  padding: 180px 5vw 50px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  color: #fff;
  background: radial-gradient(circle at 78% 32%, rgba(64,155,255,.24), transparent 34%), radial-gradient(circle at 15% 85%, rgba(142,234,216,.12), transparent 35%), linear-gradient(135deg, #07182d 0%, #0a294a 52%, #0b3456 100%);
}
.hero::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px); background-size: 54px 54px; mask-image: linear-gradient(to right, transparent, black 70%); }
.hero-copy { position: relative; z-index: 2; max-width: 880px; }
.eyebrow, .section-kicker { font-size: 11px; font-weight: 700; letter-spacing: 0.24em; }
.eyebrow { margin: 0 0 24px; color: var(--mint); }
.hero h1 { margin: 0; font-size: clamp(44px, 6.1vw, 88px); line-height: 1.06; letter-spacing: -0.045em; font-weight: 700; }
.hero h1 em { color: #a9f1e3; font-style: normal; }
.hero-description { max-width: 610px; margin: 30px 0; color: rgba(255,255,255,.69); font-size: 16px; line-height: 1.9; }
.hero-actions { display: flex; gap: 12px; }
.button { padding: 15px 22px; display: inline-flex; align-items: center; gap: 36px; border-radius: 40px; font-size: 13px; font-weight: 600; text-decoration: none; }
.button-primary { color: var(--ink); background: var(--mint); box-shadow: 0 12px 36px rgba(0,0,0,.18); }
.button-ghost { color: #fff; border: 1px solid rgba(255,255,255,.28); }
.hero-orbit { position: absolute; top: 50%; right: -40px; width: 640px; height: 640px; transform: translateY(-48%); opacity: 0.7; }
.orbit { position: absolute; inset: 8%; border: 1px solid rgba(169,241,227,.3); border-radius: 50%; }
.orbit-one { transform: rotate(28deg) scaleY(.38); }
.orbit-two { transform: rotate(-36deg) scaleY(.52); }
.globe-grid { position: absolute; inset: 24%; border: 1px solid rgba(169,241,227,.4); border-radius: 50%; background: repeating-radial-gradient(circle at 50% 50%,transparent 0 34px,rgba(169,241,227,.09) 35px 36px),repeating-linear-gradient(90deg,transparent 0 38px,rgba(169,241,227,.07) 39px 40px); }
.glow { position: absolute; inset: 28%; border-radius: 50%; background: #75bfff; filter: blur(90px); opacity: .19; }
.hero-index { position: absolute; left: 5vw; bottom: 42px; display: flex; align-items: center; gap: 13px; color: rgba(255,255,255,.5); font-size: 9px; letter-spacing: .18em; }
.hero-index i { width: 3px; height: 3px; border-radius: 50%; background: var(--mint); }
.hero-note { position: absolute; right: 5vw; bottom: 42px; display: grid; grid-template-columns: auto auto; column-gap: 14px; align-items: end; }
.hero-note span { grid-column: 1/3; margin-bottom: 6px; color: rgba(255,255,255,.48); font-size: 10px; }
.hero-note b { font-size: 30px; }
.hero-note small { margin-bottom: 6px; color: rgba(255,255,255,.48); font-size: 9px; }

.section-pad { padding: 120px 7vw; }
.section-kicker { margin: 0 0 24px; color: #6b87a3; }
.intro { background: linear-gradient(135deg, #edf5ff 0%, #f9fbfe 70%); }
.intro-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 10vw; }
.intro h2, .section-heading h2, .advantages h2, .faq h2 { margin: 0; font-size: clamp(34px, 4.3vw, 62px); line-height: 1.14; letter-spacing: -.035em; font-weight: 700; }
.intro-copy { padding-top: 10px; color: #4f6680; font-size: 15px; line-height: 1.95; }
.intro-copy p { margin: 0 0 20px; }

.services { background: #fff; }
.section-heading { margin-bottom: 70px; display: grid; grid-template-columns: 1fr 390px; gap: 40px; align-items: end; }
.service-intro { padding: 24px; border: 1px solid rgba(40,120,232,.16); border-radius: 18px; background: linear-gradient(135deg, #f4f8ff, #eef8f8); }
.service-intro p { margin: 0 0 18px; color: #4e6780; font-size: 14px; line-height: 1.75; }
.service-path { display: flex; align-items: center; justify-content: space-between; gap: 7px; }
.service-path span { min-width: 48px; padding: 7px 10px; color: #17466f; background: #fff; border: 1px solid #d6e5f4; border-radius: 20px; font-size: 11px; font-weight: 700; text-align: center; }
.service-path i { color: #74a7d9; font-size: 11px; font-style: normal; }
.service-list { border-top: 1px solid var(--line); }
.service-card { position: relative; padding: 42px 0; display: grid; grid-template-columns: 90px 1fr 1.15fr; gap: 24px; border-bottom: 1px solid var(--line); transition: .35s; }
.service-card:hover { padding-left: 14px; background: linear-gradient(90deg, rgba(220,236,255,.4), transparent 65%); }
.service-number { padding-top: 8px; color: var(--muted); font-size: 12px; }
.service-name h3 { margin: 0 0 10px; font-size: 28px; letter-spacing: -.02em; }
.service-name p { margin: 0; color: var(--muted); font-size: 13px; }
.service-detail > p { margin: 0 0 20px; color: #536b82; font-size: 14px; line-height: 1.75; }
.platform-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.platform-tags span { padding: 7px 12px; border: 1px solid #d6e3ef; border-radius: 30px; background: #f8fbff; font-size: 11px; }
.deliverables { max-height: 0; overflow: hidden; opacity: 0; transition: .35s; }
.service-card.open .deliverables { max-height: 120px; margin-top: 22px; opacity: 1; }
.deliverables ul { margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; list-style: none; }
.deliverables li { color: #526b82; font-size: 11px; }
.deliverables li::before { content: "↳"; margin-right: 7px; color: var(--service-accent); }
.service-toggle { position: absolute; top: 43px; right: 0; width: 34px; height: 34px; border: 1px solid var(--line); border-radius: 50%; color: var(--ink); background: #fff; font-size: 17px; cursor: pointer; transition: .25s; }
.service-card.open .service-toggle { color: #fff; background: var(--ink); transform: rotate(45deg); }

.platform-marquee { padding: 22px 0; overflow: hidden; background: linear-gradient(90deg, #8eead8, #9adfff); transform: rotate(-1.1deg) scale(1.02); }
.marquee-track { width: max-content; display: flex; align-items: center; gap: 32px; animation: marquee 26s linear infinite; }
.marquee-track span { font-size: 13px; font-weight: 800; letter-spacing: .14em; }
.marquee-track b { font-size: 12px; }
@keyframes marquee { to { transform: translateX(-50%); } }

.process { padding-top: 150px; background: var(--paper); }
.process-grid { display: grid; grid-template-columns: repeat(4,1fr); border-top: 1px solid var(--line); }
.process-card { min-height: 235px; padding: 26px 24px 16px 0; display: flex; flex-direction: column; border-right: 1px solid var(--line); }
.process-card:not(:first-child) { padding-left: 24px; }
.process-card:last-child { border-right: 0; }
.process-card span { color: var(--blue); font-size: 11px; font-weight: 700; }
.process-card h3 { margin: auto 0 12px; font-size: 21px; }
.process-card p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.7; }

.advantages { display: grid; grid-template-columns: .85fr 1.15fr; gap: 10vw; color: #fff; background: linear-gradient(135deg, #07182d 0%, #0b3157 100%); }
.advantage-lead > p:not(.section-kicker) { max-width: 420px; color: rgba(255,255,255,.58); font-size: 14px; line-height: 1.8; }
.section-kicker.light { color: var(--mint); }
.advantage-lead > a { margin-top: 30px; padding-bottom: 8px; display: inline-flex; gap: 50px; color: var(--mint); border-bottom: 1px solid rgba(142,234,216,.35); font-size: 13px; text-decoration: none; }
.advantage-list { border-top: 1px solid rgba(255,255,255,.16); }
.advantage-item { padding: 30px 0; display: grid; grid-template-columns: 46px 1fr; border-bottom: 1px solid rgba(255,255,255,.16); }
.advantage-icon { color: var(--mint); font-size: 24px; }
.advantage-item h3 { margin: 0 0 10px; font-size: 19px; }
.advantage-item p { margin: 0; color: rgba(255,255,255,.54); font-size: 13px; line-height: 1.7; }

.faq { display: grid; grid-template-columns: .85fr 1.15fr; gap: 10vw; background: #fff; }
.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-question { width: 100%; padding: 23px 0; display: flex; justify-content: space-between; color: var(--ink); border: 0; background: none; font: 600 15px inherit; text-align: left; cursor: pointer; }
.faq-question span { font-size: 20px; font-weight: 400; }
.faq-answer { max-height: 0; overflow: hidden; color: var(--muted); font-size: 13px; line-height: 1.8; transition: .3s; }
.faq-item.open .faq-answer { max-height: 110px; padding-bottom: 22px; }
.faq-item.open .faq-question span { transform: rotate(45deg); }

.contact { position: relative; padding: 110px 7vw; display: grid; grid-template-columns: 1fr 440px; gap: 8vw; overflow: hidden; background: linear-gradient(135deg, #8eead8 0%, #b9e5ff 100%); }
.contact-main, .contact-card { position: relative; z-index: 1; }
.contact h2 { margin: 0; font-size: clamp(48px, 6vw, 82px); line-height: 1.08; letter-spacing: -.045em; }
.contact-main > p:last-child { max-width: 520px; font-size: 14px; line-height: 1.8; }
.contact-card { padding: 34px; background: rgba(255,255,255,.86); border: 1px solid rgba(255,255,255,.7); border-radius: 20px; box-shadow: 0 24px 60px rgba(20,70,110,.14); backdrop-filter: blur(12px); }
.contact-label { color: var(--muted); font-size: 10px; letter-spacing: .2em; }
.contact-row { padding: 22px 0; display: flex; justify-content: space-between; gap: 20px; border-bottom: 1px solid var(--line); }
.contact-row small { color: var(--muted); }
.contact-row strong { font-size: 15px; text-align: right; }
.call-contact { width: 100%; margin-top: 26px; padding: 16px 18px; display: flex; justify-content: space-between; color: #fff; background: var(--ink); border-radius: 10px; font-size: 13px; text-decoration: none; }
.contact-shape { position: absolute; top: 40%; left: 35%; width: 420px; height: 420px; border: 1px solid rgba(10,36,66,.16); border-radius: 50%; transform: translate(-50%,-50%); }
.contact-shape::before, .contact-shape::after { content: ""; position: absolute; inset: 12%; border: 1px solid rgba(10,36,66,.13); border-radius: 50%; transform: scaleY(.4) rotate(28deg); }
.contact-shape::after { transform: scaleY(.4) rotate(-28deg); }

footer { padding: 45px 5vw; display: flex; align-items: center; justify-content: space-between; color: #fff; background: #07182d; }
footer p { color: rgba(255,255,255,.45); font-size: 10px; letter-spacing: .08em; }
.footer-brand .brand-mark { width: 34px; height: 34px; }
.footer-brand .brand-copy strong { font-size: 13px; }
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .site-header { height: 74px; }
  .site-header nav, .header-cta { display: none; }
  .menu-button { width: 40px; height: 40px; padding: 10px; display: block; }
  .menu-button span { height: 1px; margin: 7px 0; display: block; background: #fff; }
  .site-header.menu-open nav { position: absolute; top: 74px; left: 0; right: 0; padding: 30px 5vw; display: flex; flex-direction: column; background: #07182d; }
  .hero { min-height: 700px; padding-top: 140px; }
  .hero-orbit { width: 480px; height: 480px; right: -220px; }
  .hero-note { display: none; }
  .intro-grid, .section-heading, .advantages, .faq, .contact { grid-template-columns: 1fr; }
  .service-card { grid-template-columns: 55px 1fr; }
  .service-detail { grid-column: 2; }
  .process-grid { grid-template-columns: 1fr 1fr; }
  .process-card:nth-child(2) { border-right: 0; }
  .service-intro { max-width: 520px; }
  .contact { gap: 55px; }
  .contact-card { max-width: 540px; }
  footer { flex-wrap: wrap; gap: 22px; }
}

@media (max-width: 600px) {
  .brand-copy strong { font-size: 13px; }
  .hero { min-height: 740px; padding-left: 6vw; padding-right: 6vw; }
  .hero h1 { font-size: 42px; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .hero-index { right: 6vw; flex-wrap: wrap; }
  .section-pad { padding: 85px 6vw; }
  .intro-grid { gap: 35px; }
  .section-heading { margin-bottom: 45px; }
  .service-intro { padding: 18px; }
  .service-path { gap: 4px; }
  .service-path span { min-width: 42px; padding: 6px; }
  .service-card { grid-template-columns: 40px 1fr; padding: 32px 0; }
  .service-card:hover { padding-left: 0; }
  .service-name h3 { font-size: 23px; }
  .service-detail { grid-column: 1/3; padding-left: 40px; }
  .service-toggle { top: 29px; }
  .deliverables ul { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .process-card, .process-card:not(:first-child) { min-height: 170px; padding: 25px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .advantages, .faq { gap: 60px; }
  .contact { padding: 85px 6vw; }
  .contact h2 { font-size: 44px; }
  .contact-card { padding: 25px; }
  .contact-row { flex-direction: column; gap: 7px; }
  .contact-row strong { text-align: left; }
  footer { align-items: flex-start; flex-direction: column; }
}