:root {
  --ink: #0a1b31;
  --ink-soft: #41516a;
  --navy: #07182f;
  --navy-light: #0b2548;
  --blue: #1a84e8;
  --blue-bright: #48b9ff;
  --blue-pale: #eaf5ff;
  --line: #dbe4ee;
  --surface: #f4f8fc;
  --white: #ffffff;
  --content: 1180px;
  --shadow: 0 28px 80px rgba(4, 24, 49, 0.14);
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body.menu-open { overflow: hidden; }

a { color: inherit; text-decoration: none; }
button { font: inherit; }
svg { display: block; }

.container {
  width: min(calc(100% - 48px), var(--content));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 999;
  top: 8px;
  left: 8px;
  padding: 10px 16px;
  color: var(--white);
  background: var(--blue);
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  right: 0;
  left: 0;
  height: 76px;
  color: var(--white);
  border-bottom: 1px solid rgba(255,255,255,.12);
  transition: background .25s ease, box-shadow .25s ease, color .25s ease;
}

.site-header.scrolled {
  color: var(--ink);
  background: rgba(255,255,255,.96);
  border-bottom-color: var(--line);
  box-shadow: 0 8px 30px rgba(7,24,47,.08);
  backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: space-between;
}

.brand { display: inline-flex; align-items: center; gap: 13px; font-weight: 700; letter-spacing: .02em; }
.brand-name { white-space: nowrap; }

.brand-mark {
  position: relative;
  display: inline-flex;
  width: 34px;
  height: 34px;
  align-items: flex-end;
  gap: 3px;
  padding: 7px;
  border: 1px solid rgba(72,185,255,.8);
  border-radius: 8px;
  transform: skew(-7deg);
}
.brand-mark i { display: block; width: 5px; background: var(--blue-bright); border-radius: 1px; }
.brand-mark i:nth-child(1) { height: 9px; }
.brand-mark i:nth-child(2) { height: 17px; }
.brand-mark i:nth-child(3) { height: 13px; }
.brand-mark.small { width: 30px; height: 30px; }

.site-nav { display: flex; align-items: center; gap: 42px; height: 100%; }
.site-nav a {
  position: relative;
  display: flex;
  height: 100%;
  align-items: center;
  color: rgba(255,255,255,.78);
  font-size: .94rem;
  transition: color .2s ease;
}
.site-nav a::after {
  position: absolute;
  bottom: -1px;
  left: 50%;
  width: 0;
  height: 2px;
  content: "";
  background: var(--blue-bright);
  transform: translateX(-50%);
  transition: width .2s ease;
}
.site-nav a:hover, .site-nav a.active { color: var(--white); }
.site-nav a.active::after, .site-nav a:hover::after { width: 22px; }
.site-header.scrolled .site-nav a { color: var(--ink-soft); }
.site-header.scrolled .site-nav a:hover, .site-header.scrolled .site-nav a.active { color: var(--blue); }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 0;
  color: inherit;
  background: transparent;
  cursor: pointer;
}
.nav-toggle span { display: block; width: 23px; height: 2px; margin: 5px auto; background: currentColor; transition: .2s ease; }

.hero {
  position: relative;
  min-height: 740px;
  overflow: hidden;
  color: var(--white);
  background: linear-gradient(126deg, #061529 0%, #0a2344 56%, #071a33 100%);
}

.hero-grid, .contact-grid {
  position: absolute;
  inset: 0;
  opacity: .16;
  background-image: linear-gradient(rgba(113,190,255,.18) 1px, transparent 1px), linear-gradient(90deg, rgba(113,190,255,.18) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, transparent, black 15%, black 80%, transparent);
}

.hero::before {
  position: absolute;
  top: -130px;
  right: -160px;
  width: 610px;
  height: 610px;
  border: 1px solid rgba(72,185,255,.15);
  border-radius: 50%;
  content: "";
}

.hero-glow { position: absolute; border-radius: 50%; filter: blur(1px); pointer-events: none; }
.hero-glow-one { right: 18%; bottom: 11%; width: 260px; height: 260px; background: rgba(24,129,231,.14); box-shadow: 0 0 130px 70px rgba(24,129,231,.1); }
.hero-glow-two { top: 10%; left: -120px; width: 280px; height: 280px; background: rgba(72,185,255,.06); box-shadow: 0 0 110px 50px rgba(72,185,255,.05); }

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  min-height: 690px;
  align-items: center;
  gap: 80px;
  grid-template-columns: 1.05fr .95fr;
  padding-top: 106px;
  padding-bottom: 64px;
}

.eyebrow { display: flex; margin: 0 0 20px; align-items: center; gap: 12px; color: #8dccff; font-size: .78rem; letter-spacing: .2em; }
.eyebrow span { width: 32px; height: 1px; background: var(--blue-bright); }

.hero h1 {
  max-width: 620px;
  margin: 0;
  font-size: clamp(3rem, 5.6vw, 5.1rem);
  font-weight: 650;
  line-height: 1.14;
  letter-spacing: -.045em;
}

.hero-intro { max-width: 610px; margin: 26px 0 0; color: #c3d2e5; font-size: 1.06rem; line-height: 1.9; }
.hero-actions { display: flex; margin-top: 38px; gap: 14px; }

.button { display: inline-flex; min-width: 138px; min-height: 50px; align-items: center; justify-content: center; gap: 12px; padding: 10px 22px; border: 1px solid transparent; font-size: .94rem; transition: transform .2s ease, background .2s ease, border-color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #07182f; background: var(--blue-bright); }
.button-primary:hover { background: #72c9ff; }
.button-ghost { color: var(--white); border-color: rgba(255,255,255,.28); }
.button-ghost:hover { border-color: rgba(255,255,255,.55); background: rgba(255,255,255,.06); }

.hero-panel {
  position: relative;
  min-height: 440px;
  overflow: hidden;
  border: 1px solid rgba(150,208,255,.25);
  background: linear-gradient(145deg, rgba(16,49,85,.78), rgba(6,27,53,.68));
  box-shadow: 0 35px 100px rgba(0,0,0,.2);
  backdrop-filter: blur(12px);
}

.hero-panel::before { position: absolute; inset: 0; content: ""; background: linear-gradient(115deg, transparent 25%, rgba(72,185,255,.06) 25%, rgba(72,185,255,.06) 55%, transparent 55%); }
.panel-topline { position: relative; display: flex; padding: 21px 24px; align-items: center; justify-content: space-between; border-bottom: 1px solid rgba(150,208,255,.16); color: #bfd4e9; font-size: .8rem; letter-spacing: .08em; }
.status { display: flex; align-items: center; gap: 8px; }
.status i { width: 7px; height: 7px; border-radius: 50%; background: #5ed7b1; box-shadow: 0 0 12px #5ed7b1; }

.panel-core { position: relative; display: flex; min-height: 250px; align-items: center; justify-content: center; gap: 28px; }
.panel-core > p { margin: 0; color: #95b2ce; font-size: .9rem; line-height: 1.8; }
.panel-core strong { color: var(--white); font-size: 1.05rem; font-weight: 600; }

.core-orbit { position: relative; display: grid; width: 168px; height: 168px; place-items: center; }
.orbit { position: absolute; border: 1px solid rgba(72,185,255,.42); border-radius: 50%; }
.orbit-one { inset: 0; }
.orbit-one::before, .orbit-two::before { position: absolute; top: -4px; left: 50%; width: 8px; height: 8px; border-radius: 50%; content: ""; background: var(--blue-bright); box-shadow: 0 0 14px var(--blue-bright); }
.orbit-two { inset: 18px; border-style: dashed; opacity: .65; transform: rotate(35deg); }
.orbit-center { display: grid; width: 82px; height: 82px; place-items: center; border: 1px solid rgba(72,185,255,.65); border-radius: 50%; color: var(--white); background: rgba(15,87,151,.38); font-size: 1.3rem; font-weight: 700; letter-spacing: .14em; box-shadow: 0 0 40px rgba(72,185,255,.15); }

.panel-items { position: relative; display: grid; grid-template-columns: repeat(3,1fr); border-top: 1px solid rgba(150,208,255,.16); }
.panel-items div { display: grid; min-height: 116px; align-content: center; padding: 15px 20px; border-right: 1px solid rgba(150,208,255,.16); }
.panel-items div:last-child { border-right: 0; }
.panel-items span { color: var(--blue-bright); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .7rem; }
.panel-items strong { margin-top: 4px; font-size: .9rem; font-weight: 600; }
.panel-items small { color: #7894b0; font-size: .72rem; }

.hero-foot { position: relative; z-index: 2; display: flex; height: 50px; align-items: flex-start; justify-content: space-between; color: rgba(183,205,229,.52); font-size: .67rem; letter-spacing: .13em; }
.hero-foot i { margin-left: 8px; color: var(--blue-bright); font-style: normal; }

.section { padding: 112px 0; }
.section-grid { display: grid; gap: 110px; grid-template-columns: .68fr 1.32fr; }
.section-index { margin: 0 0 22px; color: var(--blue); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .76rem; font-weight: 700; letter-spacing: .14em; }
.section-heading h2, .contact h2 { margin: 0; font-size: clamp(2.3rem, 4vw, 3.7rem); line-height: 1.18; letter-spacing: -.04em; }
.section-heading h2::after { display: block; width: 46px; height: 3px; margin-top: 25px; content: ""; background: linear-gradient(90deg, var(--blue), var(--blue-bright)); }

.about-content { padding-top: 5px; }
.about-content > p { max-width: 760px; margin: 0; color: var(--ink-soft); }
.about-content .lead { margin-bottom: 20px; color: var(--ink); font-size: clamp(1.4rem, 2vw, 1.8rem); font-weight: 550; line-height: 1.65; }
.principles { display: grid; margin-top: 52px; grid-template-columns: repeat(3,1fr); border-top: 1px solid var(--line); }
.principle { position: relative; min-height: 170px; padding: 27px 23px 0 0; }
.principle + .principle { padding-left: 23px; border-left: 1px solid var(--line); }
.principle span { color: var(--blue); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .72rem; }
.principle h3 { margin: 12px 0 6px; font-size: 1.1rem; }
.principle p { margin: 0; color: #66758a; font-size: .9rem; line-height: 1.7; }

.business { background: var(--surface); }
.business-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 50px; }
.business-head > p { max-width: 420px; margin: 0 0 2px; color: var(--ink-soft); }
.business-list { display: grid; margin-top: 62px; grid-template-columns: repeat(3,1fr); border: 1px solid var(--line); background: var(--white); box-shadow: 0 18px 60px rgba(7,24,47,.07); }
.business-card { position: relative; min-height: 360px; padding: 38px; overflow: hidden; }
.business-card + .business-card { border-left: 1px solid var(--line); }
.business-card::before { position: absolute; top: 0; left: 0; width: 0; height: 3px; content: ""; background: linear-gradient(90deg, var(--blue), var(--blue-bright)); transition: width .35s ease; }
.business-card:hover::before { width: 100%; }
.business-icon { display: grid; width: 62px; height: 62px; place-items: center; color: var(--blue); background: var(--blue-pale); }
.business-icon svg { width: 32px; height: 32px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.business-number { position: absolute; top: 40px; right: 35px; color: #a8b6c6; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .75rem; }
.business-card h3 { margin: 31px 0 14px; font-size: 1.25rem; }
.business-card p { margin: 0; color: var(--ink-soft); font-size: .94rem; line-height: 1.85; }
.card-line { position: absolute; right: 38px; bottom: 37px; left: 38px; height: 1px; background: var(--line); }
.card-line::after { position: absolute; right: 0; bottom: 0; width: 8px; height: 8px; border-top: 1px solid var(--blue); border-right: 1px solid var(--blue); content: ""; }

.contact { position: relative; overflow: hidden; color: var(--white); background: #081b35; }
.contact::after { position: absolute; right: -140px; bottom: -280px; width: 600px; height: 600px; border: 1px solid rgba(72,185,255,.12); border-radius: 50%; content: ""; box-shadow: 0 0 100px rgba(25,130,228,.05); }
.contact-grid { opacity: .11; mask-image: linear-gradient(90deg, black, transparent 72%); }
.contact-layout { position: relative; z-index: 2; display: grid; gap: 100px; grid-template-columns: .9fr 1.1fr; }
.section-index.light { color: var(--blue-bright); }
.contact-intro > p:not(.section-index) { max-width: 470px; margin: 24px 0 0; color: #aebfd3; }
.contact-call { position: relative; display: inline-flex; margin-top: 50px; flex-direction: column; padding-right: 60px; }
.contact-call span { color: #8ea7c1; font-size: .8rem; }
.contact-call strong { margin-top: 3px; color: var(--white); font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 500; letter-spacing: .04em; }
.contact-call i { position: absolute; right: 0; bottom: 6px; display: grid; width: 40px; height: 40px; place-items: center; border: 1px solid rgba(72,185,255,.5); color: var(--blue-bright); font-style: normal; transition: background .2s ease, color .2s ease; }
.contact-call:hover i { color: var(--navy); background: var(--blue-bright); }

.contact-card { margin: 0; padding: 0 40px 10px; border: 1px solid rgba(138,190,235,.25); background: rgba(12,42,76,.66); font-style: normal; box-shadow: var(--shadow); backdrop-filter: blur(8px); }
.contact-card-head { display: flex; height: 72px; align-items: center; justify-content: space-between; border-bottom: 1px solid rgba(138,190,235,.18); color: #b7cadc; font-size: .83rem; }
.contact-card-head i { width: 8px; height: 8px; border-radius: 50%; background: var(--blue-bright); box-shadow: 0 0 13px var(--blue-bright); }
.contact-card dl { margin: 0; }
.contact-card dl > div { display: grid; min-height: 70px; align-items: center; grid-template-columns: 105px 1fr; border-bottom: 1px solid rgba(138,190,235,.12); }
.contact-card dl > div:last-child { border-bottom: 0; }
.contact-card dt { color: #819bb6; font-size: .82rem; }
.contact-card dd { min-width: 0; margin: 0; color: #eef7ff; font-size: .94rem; overflow-wrap: anywhere; }
.contact-card a { transition: color .2s ease; }
.contact-card a:hover { color: var(--blue-bright); }

.site-footer { color: #8596aa; background: #051326; font-size: .83rem; }
.footer-main { display: flex; min-height: 112px; align-items: center; justify-content: space-between; gap: 30px; border-bottom: 1px solid rgba(142,166,194,.14); }
.footer-brand { display: flex; align-items: center; gap: 13px; color: #e3edf8; }
.footer-contact { display: flex; gap: 35px; }
.footer-contact a:hover, .footer-bottom a:hover { color: var(--blue-bright); }
.footer-bottom { display: flex; min-height: 68px; align-items: center; justify-content: space-between; gap: 25px; }
.footer-bottom p { margin: 0; }

.reveal { opacity: 1; transform: none; }
.reveal.visible { animation: reveal-in .65s ease both; }

@keyframes reveal-in {
  from { opacity: .01; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 980px) {
  .hero-inner { gap: 40px; grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: clamp(3rem, 6vw, 4.2rem); }
  .panel-core { flex-direction: column; gap: 8px; }
  .panel-core > p { text-align: center; }
  .core-orbit { width: 145px; height: 145px; }
  .section-grid { gap: 55px; grid-template-columns: .55fr 1.45fr; }
  .business-card { min-height: 390px; padding: 30px; }
  .card-line { right: 30px; left: 30px; }
  .contact-layout { gap: 50px; }
}

@media (max-width: 760px) {
  .container { width: min(calc(100% - 36px), var(--content)); }
  .site-header { height: 68px; }
  .brand-name { font-size: .93rem; }
  .nav-toggle { display: block; }
  .site-nav {
    position: fixed;
    z-index: -1;
    top: 68px;
    right: 0;
    bottom: 0;
    left: 0;
    display: grid;
    height: auto;
    padding: 45px 28px;
    align-content: start;
    gap: 0;
    color: var(--white);
    background: #07182f;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .2s ease, transform .2s ease, visibility .2s;
  }
  .site-nav.open { opacity: 1; visibility: visible; transform: translateY(0); }
  .site-nav a, .site-header.scrolled .site-nav a { height: auto; padding: 17px 3px; border-bottom: 1px solid rgba(255,255,255,.11); color: rgba(255,255,255,.85); font-size: 1.1rem; }
  .site-nav a::after { display: none; }
  .site-nav a.active { color: var(--blue-bright); }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .hero { min-height: auto; }
  .hero-inner { min-height: auto; padding-top: 132px; padding-bottom: 80px; gap: 60px; grid-template-columns: 1fr; }
  .hero h1 { font-size: clamp(2.75rem, 12vw, 4rem); }
  .hero-intro { font-size: 1rem; }
  .hero-panel { min-height: 390px; }
  .panel-core { min-height: 220px; }
  .panel-items div { min-height: 96px; padding: 12px; }
  .panel-items small { display: none; }
  .hero-foot { display: none; }

  .section { padding: 82px 0; }
  .section-grid { gap: 45px; grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr; }
  .principle { min-height: 130px; padding: 23px 0; }
  .principle + .principle { padding-left: 0; border-top: 1px solid var(--line); border-left: 0; }
  .business-head { display: block; }
  .business-head > p { margin-top: 35px; }
  .business-list { grid-template-columns: 1fr; }
  .business-card { min-height: 310px; }
  .business-card + .business-card { border-top: 1px solid var(--line); border-left: 0; }
  .contact-layout { grid-template-columns: 1fr; }
  .contact-card { padding-inline: 25px; }
  .contact-card dl > div { padding: 17px 0; align-items: start; gap: 4px; grid-template-columns: 1fr; }
  .footer-main { padding: 32px 0; align-items: flex-start; flex-direction: column; }
  .footer-contact { flex-direction: column; gap: 5px; }
  .footer-bottom { padding: 22px 0; align-items: flex-start; flex-direction: column; gap: 4px; }
}

@media (max-width: 420px) {
  .brand-name { font-size: .84rem; letter-spacing: 0; }
  .brand-mark { width: 30px; height: 30px; padding: 6px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .hero-panel { min-height: 360px; }
  .panel-topline { padding-inline: 17px; }
  .core-orbit { width: 135px; height: 135px; }
  .panel-items strong { font-size: .8rem; }
  .business-card { padding: 28px 25px; }
  .card-line { right: 25px; left: 25px; }
  .contact-call strong { font-size: 1.75rem; }
}