:root {
  --bg: #06101d;
  --bg-soft: #0a1727;
  --surface: rgba(13, 31, 51, 0.78);
  --text: #f3f8ff;
  --muted: #9eb0c5;
  --line: rgba(151, 188, 223, 0.17);
  --blue: #28a9ff;
  --cyan: #49e3d0;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 75% 5%, rgba(25, 111, 180, .2), transparent 28rem),
    linear-gradient(180deg, #071321 0%, var(--bg) 44%, #040b13 100%);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }

.site-header {
  width: min(calc(100% - 40px), var(--max));
  height: 84px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 12px; font-size: 18px; font-weight: 700; letter-spacing: .04em; }
.brand-mark {
  width: 39px; height: 39px; display: grid; place-items: center;
  color: #06101d; background: linear-gradient(135deg, var(--cyan), var(--blue));
  border-radius: 8px 2px 8px 2px; font: 800 13px/1 system-ui; letter-spacing: -.04em;
}
nav { display: flex; align-items: center; gap: 34px; }
nav a { color: var(--muted); font-size: 14px; transition: color .2s; }
nav a:hover { color: white; }
nav .nav-contact { color: white; border: 1px solid rgba(73, 227, 208, .5); padding: 8px 18px; border-radius: 999px; }

.hero {
  width: min(calc(100% - 40px), var(--max));
  min-height: 650px;
  margin: auto;
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  align-items: center;
  gap: 50px;
  padding: 70px 0 80px;
}
.eyebrow, .section-no { color: var(--cyan); font: 700 12px/1.4 system-ui; letter-spacing: .18em; }
.eyebrow { display: flex; align-items: center; gap: 10px; }
.eyebrow span { width: 30px; height: 1px; background: var(--cyan); }
h1 { margin: 24px 0 24px; font-size: clamp(48px, 6vw, 78px); line-height: 1.13; letter-spacing: -.055em; }
h1 em { color: transparent; font-style: normal; -webkit-text-stroke: 1px #62d5ff; text-shadow: 0 0 28px rgba(40,169,255,.18); }
.lead { max-width: 660px; margin: 0; color: var(--muted); font-size: 18px; line-height: 1.9; }
.hero-actions { display: flex; gap: 14px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-width: 138px; padding: 12px 22px; border-radius: 5px; font-weight: 700; font-size: 15px; }
.button.primary { color: #03111c; background: linear-gradient(100deg, var(--cyan), #52b9ff); box-shadow: 0 12px 40px rgba(40, 169, 255, .2); }
.button.secondary { border: 1px solid var(--line); background: rgba(255,255,255,.025); }
.trust-row { display: flex; gap: 30px; margin-top: 36px; color: #b8c7d8; font-size: 13px; }
.trust-row span::before { content: "✓"; color: var(--cyan); margin-right: 8px; }

.hero-visual { position: relative; min-height: 450px; perspective: 900px; }
.orb { position: absolute; width: 280px; height: 280px; right: 30px; top: 60px; border-radius: 50%; background: radial-gradient(circle at 35% 30%, rgba(73,227,208,.55), rgba(26,115,196,.3) 35%, rgba(5,12,22,.1) 70%); filter: blur(1px); box-shadow: 0 0 85px rgba(40,169,255,.22); }
.panel { position: absolute; border: 1px solid rgba(104,198,255,.28); background: rgba(8, 22, 38, .72); backdrop-filter: blur(14px); box-shadow: 0 28px 90px rgba(0,0,0,.32); }
.panel-main { width: 330px; right: 60px; top: 105px; padding: 22px; transform: rotateY(-9deg) rotateX(4deg); }
.panel-top { display: flex; gap: 6px; margin-bottom: 28px; }
.panel-top i { width: 6px; height: 6px; border-radius: 50%; background: #3b566e; }
.panel-top i:first-child { background: var(--cyan); }
.code-line { height: 5px; margin: 14px 0; border-radius: 9px; background: linear-gradient(90deg, #2fb8ff, rgba(47,184,255,.08)); }
.code-line.wide { width: 88%; }.code-line.medium { width: 66%; }.code-line.short { width: 43%; }
.terminal-line { margin-top: 32px; padding: 13px; color: #92f3d6; border: 1px solid rgba(73,227,208,.14); background: rgba(73,227,208,.05); font: 600 12px/1.4 ui-monospace, monospace; }
.terminal-line span { color: var(--blue); margin-right: 8px; }
.mini-card { position: absolute; width: 150px; padding: 15px 18px; border: 1px solid var(--line); background: rgba(7, 20, 34, .88); box-shadow: 0 18px 50px rgba(0,0,0,.3); }
.mini-card b { display: block; color: var(--cyan); font: 700 11px/1.3 system-ui; letter-spacing: .1em; }
.mini-card span { font-size: 14px; }
.mini-one { left: 5px; top: 82px; }.mini-two { right: 0; bottom: 65px; }
.grid-plane { position: absolute; inset: 160px 0 0 60px; z-index: -1; opacity: .22; transform: rotateX(65deg); transform-origin: center; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 34px 34px; mask-image: linear-gradient(to bottom, #000, transparent 75%); }

.section { width: min(calc(100% - 40px), var(--max)); margin: auto; padding: 105px 0; }
.section-heading { display: grid; grid-template-columns: .55fr 1fr 1fr; align-items: end; gap: 30px; margin-bottom: 48px; }
.section-heading h2, .contact h2 { margin: 0; font-size: clamp(34px, 4vw, 52px); line-height: 1.25; letter-spacing: -.035em; }
.section-heading > p:last-child { margin: 0; color: var(--muted); }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.service-card { position: relative; min-height: 320px; padding: 30px; overflow: hidden; border: 1px solid var(--line); background: linear-gradient(145deg, rgba(15,34,54,.78), rgba(8,20,34,.66)); transition: transform .25s, border-color .25s; }
.service-card:hover { transform: translateY(-5px); border-color: rgba(73,227,208,.38); }
.service-card.featured::after { content: ""; position: absolute; inset: auto -60px -80px auto; width: 190px; height: 190px; border-radius: 50%; background: rgba(40,169,255,.12); filter: blur(14px); }
.card-index { position: absolute; right: 24px; top: 20px; color: #50677c; font: 700 12px/1 system-ui; }
.service-icon { width: 52px; height: 52px; display: grid; place-items: center; margin-bottom: 30px; color: var(--cyan); border: 1px solid rgba(73,227,208,.27); background: rgba(73,227,208,.06); font: 800 14px/1 ui-monospace, monospace; }
.service-card h3 { margin: 0 0 12px; font-size: 22px; }
.service-card p { color: var(--muted); font-size: 15px; }
.service-card a { position: absolute; bottom: 28px; left: 30px; color: #dcecff; font-size: 14px; }
.service-card a span { color: var(--cyan); margin-left: 7px; }

.process { border-top: 1px solid var(--line); }
.section-heading.compact { grid-template-columns: .55fr 2fr; }
.steps { margin: 60px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.steps li { display: grid; grid-template-columns: .55fr .7fr 1.3fr; align-items: baseline; padding: 27px 0; border-bottom: 1px solid var(--line); }
.steps > li > span { color: var(--cyan); font: 700 13px/1 system-ui; }
.steps h3 { margin: 0; font-size: 19px; }.steps p { margin: 0; color: var(--muted); }

.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: end; margin-bottom: 90px; padding: 70px; border: 1px solid rgba(73,227,208,.18); background: linear-gradient(135deg, rgba(18,49,74,.72), rgba(7,20,34,.85)); box-shadow: inset 0 1px 0 rgba(255,255,255,.03); }
.contact-copy > p:last-child { margin-top: 20px; color: var(--muted); }
.contact-list { display: grid; gap: 12px; }
.contact-item { width: 100%; padding: 20px 22px; display: grid; grid-template-columns: .65fr 1fr auto; align-items: center; color: var(--text); text-align: left; cursor: pointer; border: 1px solid var(--line); background: rgba(3,13,23,.5); transition: border-color .2s, background .2s; }
.contact-item:hover { border-color: rgba(73,227,208,.45); background: rgba(9,30,48,.75); }
.contact-type { color: var(--cyan); font: 700 11px/1.4 system-ui; letter-spacing: .08em; }
.contact-item strong { font-size: 17px; letter-spacing: .02em; }
.copy-label { color: var(--muted); font-size: 12px; }

footer { width: min(calc(100% - 40px), var(--max)); margin: auto; padding: 30px 0 38px; display: grid; grid-template-columns: 1fr auto; gap: 12px 30px; align-items: center; border-top: 1px solid var(--line); color: #71869b; font-size: 12px; }
footer > div { display: flex; align-items: center; gap: 10px; color: #c8d5e1; }
.brand-mark.small { width: 28px; height: 28px; font-size: 9px; }
footer p { margin: 0; }.disclaimer { grid-column: 1 / -1; max-width: 900px; }
.toast { position: fixed; left: 50%; bottom: 28px; translate: -50% 20px; padding: 9px 18px; color: #03111c; background: var(--cyan); border-radius: 999px; font-size: 14px; font-weight: 700; opacity: 0; pointer-events: none; transition: .2s; }
.toast.show { opacity: 1; translate: -50% 0; }

@media (max-width: 850px) {
  nav a:not(.nav-contact) { display: none; }
  .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 80px; }
  .hero-visual { min-height: 390px; }
  .section-heading { grid-template-columns: 1fr; gap: 10px; }
  .service-grid { grid-template-columns: 1fr; }
  .service-card { min-height: 285px; }
  .section-heading.compact { grid-template-columns: 1fr; }
  .steps li { grid-template-columns: 60px 1fr; }
  .steps li div { grid-column: 2; }
  .contact { grid-template-columns: 1fr; gap: 38px; padding: 40px; }
}
@media (max-width: 560px) {
  .site-header { width: min(calc(100% - 28px), var(--max)); height: 72px; }
  .brand { font-size: 16px; }.brand-mark { width: 35px; height: 35px; }
  .nav-contact { padding: 6px 13px !important; }
  .hero, .section, footer { width: min(calc(100% - 28px), var(--max)); }
  .hero { padding-top: 58px; gap: 18px; }
  h1 { font-size: 46px; }
  .lead { font-size: 16px; }
  .hero-actions { flex-direction: column; }.button { width: 100%; }
  .trust-row { flex-wrap: wrap; gap: 8px 20px; }
  .hero-visual { min-height: 350px; transform: scale(.9); transform-origin: top center; margin: 0 -20px -20px; }
  .panel-main { right: 16px; width: 300px; }
  .mini-one { left: 0; }.mini-two { right: -10px; }
  .section { padding: 76px 0; }
  .steps li { align-items: start; }.steps p { margin-top: 7px; }
  .contact { width: calc(100% - 28px); padding: 30px 20px; margin-bottom: 60px; }
  .contact-item { grid-template-columns: 1fr auto; gap: 5px 15px; }
  .contact-item strong { grid-column: 1; }.copy-label { grid-row: 1 / 3; grid-column: 2; }
  footer { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}