:root {
  --ink: #edf6f0;
  --muted: #9cb2aa;
  --deep: #06120f;
  --panel: #0b1e19;
  --panel-soft: #102720;
  --line: rgba(218, 238, 228, 0.14);
  --acid: #b7f34a;
  --mint: #49deb0;
  --orange: #ff7b45;
  --radius: 28px;
  --font-sans: Inter, "Avenir Next", "Helvetica Neue", "PingFang SC", "Noto Sans CJK SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 77% 4%, rgba(73, 222, 176, 0.11), transparent 30rem),
    var(--deep);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
}

body[data-lang="zh"] .lang-en,
body[data-lang="en"] .lang-zh { display: none !important; }

a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; padding: 10px 16px; background: var(--acid); color: #102017; border-radius: 8px; }
.skip-link:focus { top: 16px; }
.page-noise {
  position: fixed; inset: 0; pointer-events: none; z-index: 10; opacity: 0.035;
  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='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.9'/%3E%3C/svg%3E");
}
.section-shell { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }

.site-header { position: fixed; z-index: 50; left: 0; right: 0; top: 0; padding: 18px 24px; transition: padding .25s ease; }
.site-header.scrolled { padding-top: 10px; }
.nav-shell { width: min(1180px, 100%); margin-inline: auto; min-height: 64px; padding: 10px 14px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; background: rgba(7, 22, 18, .74); border: 1px solid var(--line); border-radius: 18px; backdrop-filter: blur(18px); box-shadow: 0 12px 48px rgba(0, 0, 0, .18); }
.brand { display: inline-flex; align-items: center; gap: 12px; width: max-content; }
.brand-mark { display: grid; place-items: center; width: 42px; aspect-ratio: 1; color: #0b1d17; background: var(--acid); border-radius: 11px; font-size: 14px; font-weight: 900; letter-spacing: -.08em; transform: rotate(-3deg); }
.brand-copy { display: flex; flex-direction: column; line-height: 1.1; }
.brand-copy strong { font-size: 15px; letter-spacing: .04em; }
.brand-copy small { margin-top: 5px; color: var(--muted); font-size: 9px; letter-spacing: .16em; }
.desktop-nav { display: flex; align-items: center; gap: 30px; }
.desktop-nav a { color: var(--muted); font-size: 13px; transition: color .2s ease; }
.desktop-nav a:hover, .desktop-nav a:focus-visible { color: var(--ink); }
.language-toggle { justify-self: end; display: inline-flex; gap: 8px; align-items: center; padding: 8px 10px; color: var(--ink); background: transparent; border: 0; cursor: pointer; font: 700 11px/1 var(--font-sans); }
.toggle-option { opacity: .38; transition: opacity .2s ease; }
body[data-lang="zh"] .toggle-zh, body[data-lang="en"] .toggle-en { opacity: 1; }
.toggle-track { position: relative; display: block; width: 34px; height: 18px; background: rgba(255,255,255,.13); border: 1px solid rgba(255,255,255,.1); border-radius: 20px; }
.toggle-track span { position: absolute; top: 3px; left: 3px; width: 10px; height: 10px; background: var(--acid); border-radius: 50%; transition: transform .24s ease; }
body[data-lang="en"] .toggle-track span { transform: translateX(16px); }

.hero { min-height: 100vh; padding-top: 180px; padding-bottom: 70px; display: grid; grid-template-columns: 1.05fr .95fr; grid-template-rows: 1fr auto; align-items: center; gap: 56px 30px; }
.eyebrow, .kicker { margin: 0 0 22px; color: var(--mint); font-size: 11px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.eyebrow { display: flex; align-items: center; gap: 10px; }
.eyebrow-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--acid); box-shadow: 0 0 0 5px rgba(183,243,74,.09); }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 30px; font-size: clamp(52px, 6.3vw, 92px); line-height: .98; letter-spacing: -.065em; font-weight: 690; }
h1 em { color: var(--acid); font-style: normal; }
.hero-summary { max-width: 620px; color: var(--muted); font-size: clamp(17px, 1.6vw, 21px); line-height: 1.75; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 38px; }
.button { min-height: 52px; padding: 0 22px; display: inline-flex; align-items: center; justify-content: center; gap: 28px; border: 1px solid var(--line); border-radius: 14px; font-size: 14px; font-weight: 760; transition: transform .2s ease, background .2s ease, border-color .2s ease; }
.button:hover, .button:focus-visible { transform: translateY(-2px); }
.button-primary { color: #102017; background: var(--acid); border-color: var(--acid); }
.button-secondary { background: rgba(255,255,255,.025); }

.hero-visual { position: relative; width: min(480px, 100%); aspect-ratio: 1; justify-self: end; border: 1px solid var(--line); border-radius: 50%; background: radial-gradient(circle, rgba(73,222,176,.15), rgba(73,222,176,.025) 47%, transparent 48%), linear-gradient(135deg, rgba(255,255,255,.025), transparent); box-shadow: inset 0 0 80px rgba(73,222,176,.05), 0 50px 120px rgba(0,0,0,.2); }
.hero-visual::before, .hero-visual::after { content: ""; position: absolute; background: var(--line); }
.hero-visual::before { width: 1px; top: 6%; bottom: 6%; left: 50%; }
.hero-visual::after { height: 1px; left: 6%; right: 6%; top: 50%; }
.orbit { position: absolute; inset: 14%; border: 1px solid rgba(183,243,74,.24); border-radius: 50%; }
.orbit-two { inset: 27%; border-color: rgba(73,222,176,.3); }
.orbit-three { inset: 4%; border-color: rgba(255,255,255,.08); border-style: dashed; animation: spin 32s linear infinite; }
.visual-core { position: absolute; inset: 36%; display: grid; place-content: center; text-align: center; color: #112018; background: var(--acid); border-radius: 50%; box-shadow: 0 0 80px rgba(183,243,74,.24); }
.visual-core span { font-size: clamp(36px, 5vw, 58px); font-weight: 900; letter-spacing: -.09em; line-height: .9; }
.visual-core small { margin-top: 7px; font-size: 8px; font-weight: 900; letter-spacing: .27em; }
.orbit-tag { position: absolute; padding: 7px 10px; color: var(--deep); background: var(--ink); border-radius: 8px; font-size: 9px; font-weight: 900; letter-spacing: .08em; box-shadow: 0 10px 35px rgba(0,0,0,.23); }
.tag-app { left: 6%; top: 36%; transform: rotate(-7deg); }
.tag-kol { right: 5%; top: 26%; transform: rotate(6deg); background: var(--orange); }
.tag-global { right: 13%; bottom: 18%; transform: rotate(-4deg); background: var(--mint); }
.visual-coordinate { position: absolute; color: rgba(237,246,240,.35); font: 700 8px/1 var(--font-sans); letter-spacing: .12em; }
.coordinate-top { top: 10%; left: 43%; }
.coordinate-bottom { bottom: 8%; left: 26%; }
@keyframes spin { to { transform: rotate(360deg); } }

.hero-facts { grid-column: 1 / -1; display: grid; grid-template-columns: .7fr .7fr 1.5fr; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.fact { padding: 22px 30px 22px 0; display: flex; flex-direction: column; gap: 3px; }
.fact + .fact { border-left: 1px solid var(--line); padding-left: 30px; }
.fact strong { color: var(--ink); font-size: clamp(24px, 2.5vw, 38px); letter-spacing: -.04em; }
.fact span { color: var(--muted); font-size: 12px; }

.about, .services, .process { padding-top: 140px; padding-bottom: 140px; }
.section-index { display: flex; justify-content: flex-end; padding-bottom: 20px; border-bottom: 1px solid var(--line); color: rgba(237,246,240,.4); font-size: 10px; letter-spacing: .16em; }
.about-grid, .process-grid { margin-top: 74px; display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(60px, 10vw, 150px); }
.section-heading h2 { margin: 0; font-size: clamp(38px, 4.7vw, 66px); line-height: 1.08; letter-spacing: -.055em; font-weight: 650; }
.about-copy { padding-top: 5px; }
.about-copy p { color: var(--muted); font-size: 16px; line-height: 1.9; }
.about-copy .lead { color: var(--ink); font-size: clamp(20px, 2.2vw, 27px); line-height: 1.6; }
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 45px; }
.principles div { min-height: 110px; padding: 15px; display: flex; flex-direction: column; justify-content: space-between; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.018); }
.principles span { color: var(--mint); font-size: 9px; }
.principles strong { font-size: 14px; }

.services { width: 100%; max-width: none; padding-inline: max(24px, calc((100vw - 1180px) / 2)); background: #e8efe9; color: #0b1c17; }
.services .section-index { border-color: rgba(10,30,23,.17); color: rgba(10,30,23,.45); }
.services .kicker { color: #208868; }
.services-heading { margin: 72px 0; }
.service-card { position: relative; min-height: 580px; padding: clamp(30px, 5vw, 65px); display: grid; grid-template-columns: 58px 1fr 1fr; gap: 28px; overflow: hidden; border-radius: var(--radius); }
.service-card + .service-card { margin-top: 24px; }
.app-card { color: var(--ink); background: var(--panel); }
.kol-card { color: #101c18; background: var(--acid); }
.service-number { font-size: 11px; font-weight: 800; letter-spacing: .1em; opacity: .55; }
.service-content { align-self: center; z-index: 2; }
.service-label { margin-bottom: 18px; font-size: 10px; font-weight: 850; letter-spacing: .17em; opacity: .55; }
.service-content h3 { margin-bottom: 26px; font-size: clamp(37px, 4.5vw, 62px); line-height: 1; letter-spacing: -.055em; }
.service-content > p:not(.service-label) { max-width: 560px; color: inherit; opacity: .7; line-height: 1.85; }
.service-content ul { padding: 0; margin: 38px 0 0; list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.service-content li { padding: 8px 12px; border: 1px solid currentColor; border-radius: 999px; font-size: 11px; opacity: .75; }
.phone-stage, .network-stage { position: relative; min-width: 0; }
.phone-stage::before { content: ""; position: absolute; width: 400px; height: 400px; top: 50%; left: 50%; transform: translate(-50%, -50%); background: radial-gradient(circle, rgba(183,243,74,.22), transparent 66%); }
.phone { position: absolute; width: 230px; height: 464px; left: 50%; top: 54%; transform: translate(-50%, -50%) rotate(7deg); padding: 8px; background: #1b2925; border: 1px solid rgba(255,255,255,.18); border-radius: 42px; box-shadow: 0 45px 80px rgba(0,0,0,.32); }
.phone-island { position: absolute; z-index: 2; top: 16px; left: 50%; transform: translateX(-50%); width: 65px; height: 18px; background: #07100d; border-radius: 20px; }
.phone-screen { height: 100%; padding: 50px 22px 28px; display: flex; flex-direction: column; justify-content: flex-end; background: radial-gradient(circle at 80% 12%, rgba(183,243,74,.32), transparent 32%), linear-gradient(145deg, #16372d, #091713); border-radius: 35px; }
.mini-mark { display: grid; place-items: center; margin-bottom: auto; width: 39px; aspect-ratio: 1; color: #112018; background: var(--acid); border-radius: 10px; font-weight: 900; font-size: 11px; }
.phone-screen p { margin-bottom: 5px; color: var(--mint); font-size: 9px; font-weight: 800; letter-spacing: .16em; }
.phone-screen strong { font-size: 26px; letter-spacing: -.04em; }
.loading-line { height: 3px; margin-top: 22px; overflow: hidden; background: rgba(255,255,255,.12); border-radius: 5px; }
.loading-line span { display: block; width: 58%; height: 100%; background: var(--acid); }
.network-stage { align-self: stretch; }
.network-stage::before { content: ""; position: absolute; width: min(430px, 90%); aspect-ratio: 1; top: 50%; left: 50%; transform: translate(-50%,-50%); border: 1px solid rgba(8,27,20,.17); border-radius: 50%; }
.globe-line { position: absolute; width: min(430px, 90%); aspect-ratio: 1; top: 50%; left: 50%; border: 1px solid rgba(8,27,20,.17); border-radius: 50%; }
.globe-line-a { transform: translate(-50%,-50%) rotateY(66deg); }
.globe-line-b { transform: translate(-50%,-50%) rotateX(66deg); }
.globe-axis { position: absolute; width: min(430px, 90%); height: 1px; top: 50%; left: 50%; transform: translate(-50%,-50%) rotate(-25deg); background: rgba(8,27,20,.2); }
.network-node { position: absolute; z-index: 2; display: grid; place-items: center; width: 62px; aspect-ratio: 1; color: var(--ink); background: var(--deep); border: 6px solid var(--acid); border-radius: 50%; font-size: 9px; font-weight: 900; box-shadow: 0 12px 30px rgba(0,0,0,.15); }
.node-a { left: 10%; top: 34%; }
.node-b { right: 12%; top: 17%; }
.node-c { left: 37%; bottom: 9%; }
.node-d { right: 2%; bottom: 29%; width: 82px; }

.process-list { list-style: none; margin: 0; padding: 0; }
.process-list li { padding: 28px 0; display: grid; grid-template-columns: 58px 1fr; border-top: 1px solid var(--line); }
.process-list li:last-child { border-bottom: 1px solid var(--line); }
.process-list > li > span { color: var(--mint); font-size: 10px; font-weight: 800; }
.process-list strong { font-size: 21px; }
.process-list p { margin: 7px 0 0; color: var(--muted); font-size: 14px; }

.contact { padding-bottom: 70px; }
.contact-panel { position: relative; padding: clamp(38px, 7vw, 88px); display: grid; grid-template-columns: 1fr 1fr; gap: 80px; overflow: hidden; color: #0a1b16; background: var(--acid); border-radius: var(--radius); }
.contact-panel::after { content: "BL"; position: absolute; right: -28px; bottom: -128px; color: rgba(5,20,14,.055); font-size: 340px; line-height: 1; font-weight: 950; letter-spacing: -.13em; pointer-events: none; }
.contact-heading, .contact-details { position: relative; z-index: 2; }
.contact-heading .kicker { color: #277454; }
.contact-heading h2 { margin: 0; font-size: clamp(44px, 5vw, 70px); line-height: 1.04; letter-spacing: -.06em; }
.contact-details { display: flex; flex-direction: column; justify-content: center; }
.contact-item { padding: 20px 0; border-top: 1px solid rgba(7,24,17,.18); }
.contact-item:last-child { border-bottom: 1px solid rgba(7,24,17,.18); }
.contact-item > span { display: block; margin-bottom: 8px; color: rgba(5,23,16,.58); font-size: 9px; font-weight: 850; letter-spacing: .15em; }
.contact-item strong, .contact-item address { font-size: 15px; font-style: normal; font-weight: 700; line-height: 1.65; }
.email-link { display: inline-flex; align-items: center; gap: 9px; border-bottom: 1px solid rgba(7,24,17,.35); transition: border-color .2s ease, opacity .2s ease; }
.email-link:hover, .email-link:focus-visible { border-color: currentColor; opacity: .68; }

.site-footer { padding-top: 34px; padding-bottom: 34px; display: flex; align-items: flex-end; justify-content: space-between; border-top: 1px solid var(--line); }
.footer-brand { display: flex; align-items: center; gap: 15px; }
.footer-brand p { margin: 0; line-height: 1.4; }
.footer-brand strong { font-size: 12px; }
.footer-brand p > span { color: var(--muted); font-size: 8px; letter-spacing: .13em; }
.footer-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 7px; color: var(--muted); font-size: 9px; letter-spacing: .1em; }

.reveal { opacity: 0; transform: translateY(22px); transition: opacity .75s ease, transform .75s cubic-bezier(.2,.7,.2,1); }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 900px) {
  .nav-shell { grid-template-columns: 1fr auto; }
  .desktop-nav { display: none; }
  .hero { padding-top: 150px; grid-template-columns: 1fr; }
  .hero-visual { width: min(500px, 88vw); justify-self: center; }
  .hero-facts { grid-template-columns: 1fr 1fr; }
  .fact-wide { grid-column: 1/-1; border-top: 1px solid var(--line); border-left: 0 !important; padding-left: 0 !important; }
  .about-grid, .process-grid { grid-template-columns: 1fr; gap: 55px; }
  .service-card { grid-template-columns: 38px 1fr; min-height: 830px; }
  .phone-stage, .network-stage { grid-column: 1/-1; min-height: 360px; }
  .phone { width: 200px; height: 404px; }
  .contact-panel { grid-template-columns: 1fr; gap: 50px; }
}

@media (max-width: 600px) {
  .section-shell { width: min(100% - 32px, 1180px); }
  .site-header { padding: 10px; }
  .nav-shell { padding: 8px 10px; min-height: 58px; border-radius: 15px; }
  .brand-copy { display: none; }
  .brand-mark { width: 39px; }
  .hero { padding-top: 128px; gap: 42px; }
  h1 { font-size: clamp(45px, 14vw, 68px); }
  .hero-summary { font-size: 16px; }
  .hero-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .button { padding: 0 14px; gap: 12px; font-size: 12px; }
  .hero-visual { width: 90vw; transform: translateX(calc((100vw - (100vw - 32px)) / -2 + 5vw)); }
  .hero-facts { grid-template-columns: 1fr 1fr; }
  .fact { padding: 18px 15px 18px 0; }
  .fact + .fact { padding-left: 15px; }
  .about, .services, .process { padding-top: 100px; padding-bottom: 100px; }
  .about-grid, .process-grid { margin-top: 50px; }
  .principles { grid-template-columns: 1fr; }
  .principles div { min-height: 86px; }
  .services { padding-inline: 16px; }
  .services-heading { margin: 50px 0; }
  .service-card { min-height: 790px; padding: 28px 22px; grid-template-columns: 1fr; gap: 12px; border-radius: 22px; }
  .service-number { margin-bottom: 14px; }
  .service-content h3 { font-size: 42px; }
  .phone-stage, .network-stage { grid-column: 1; min-height: 340px; }
  .network-stage { margin-inline: -20px; }
  .network-node { width: 52px; border-width: 5px; }
  .node-d { width: 70px; }
  .contact { width: calc(100% - 32px); }
  .contact-panel { padding: 34px 24px; border-radius: 22px; }
  .contact-panel::after { font-size: 230px; bottom: -80px; }
  .site-footer { align-items: flex-start; gap: 28px; }
  .footer-brand .brand-mark, .footer-brand p > span { display: none; }
  .footer-meta { align-items: flex-end; flex-shrink: 0; }
}