:root {
  --ink: #eaf2f8;
  --muted: #9eb1c2;
  --navy: #071323;
  --navy-soft: #0b1d31;
  --line: rgba(153, 187, 211, 0.18);
  --teal: #2dd4bf;
  --teal-dark: #14b8a6;
  --white: #fff;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--navy);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; padding: 10px 16px; background: var(--teal); color: #031711; border-radius: 8px; }
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(7, 19, 35, 0.84);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}
.nav-wrap { min-height: 74px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 700; letter-spacing: .04em; }
.brand-mark { width: 38px; height: 38px; display: grid; place-items: center; border: 1px solid rgba(45,212,191,.5); border-radius: 10px; background: rgba(45,212,191,.1); color: var(--teal); font-family: Georgia, serif; }
nav { display: flex; align-items: center; gap: 30px; }
nav a { color: #bac9d5; font-size: .94rem; transition: color .2s ease; }
nav a:hover, nav a:focus-visible { color: var(--white); }
.nav-cta { padding: 8px 17px; border: 1px solid rgba(45,212,191,.45); border-radius: 999px; }
.menu-button { display: none; color: var(--ink); border: 1px solid var(--line); background: transparent; border-radius: 8px; padding: 6px 12px; }

.hero { position: relative; overflow: hidden; padding: 112px 0 102px; }
.hero::before { content: ""; position: absolute; width: 560px; height: 560px; right: -130px; top: -170px; background: radial-gradient(circle, rgba(45,212,191,.14), transparent 68%); pointer-events: none; }
.hero::after { content: ""; position: absolute; inset: 0; opacity: .12; pointer-events: none; background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px); background-size: 54px 54px; mask-image: linear-gradient(to bottom, #000, transparent 84%); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.15fr .85fr; gap: 80px; align-items: center; }
.hero-grid > *, .about-grid > *, .faq-grid > *, .contact-inner > * { min-width: 0; }
.eyebrow { margin: 0 0 14px; color: var(--teal); font-size: .82rem; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; }
h1, h2, h3 { margin-top: 0; line-height: 1.25; }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1 { max-width: 760px; margin-bottom: 24px; font-size: clamp(2.65rem, 5.7vw, 5.15rem); letter-spacing: -.045em; }
h2 { margin-bottom: 18px; font-size: clamp(2rem, 3.4vw, 3.15rem); letter-spacing: -.035em; }
h3 { margin-bottom: 12px; font-size: 1.15rem; }
.hero-lead { max-width: 690px; margin: 0; color: #aec0ce; font-size: 1.1rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: 10px 22px; border-radius: 9px; font-weight: 700; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button.primary { background: var(--teal); color: #041714; }
.button.primary:hover { background: #5eead4; }
.button.secondary { border: 1px solid var(--line); background: rgba(255,255,255,.035); }
.hero-points { display: flex; gap: 30px; margin: 32px 0 0; padding: 0; color: #9fb2c1; list-style: none; font-size: .92rem; }
.hero-points li::before { content: ""; display: inline-block; width: 5px; height: 5px; margin: 0 9px 2px 0; border-radius: 50%; background: var(--teal); }

.hero-panel { padding: 22px; border: 1px solid rgba(150,190,218,.2); border-radius: 18px; background: linear-gradient(145deg, rgba(16,42,66,.92), rgba(7,22,38,.95)); box-shadow: 0 28px 70px rgba(0,0,0,.28); }
.terminal-bar { display: flex; gap: 7px; padding-bottom: 19px; border-bottom: 1px solid var(--line); }
.terminal-bar span { width: 8px; height: 8px; border-radius: 50%; background: #345067; }
.terminal-bar span:first-child { background: var(--teal); }
.code-line { display: grid; grid-template-columns: 42px 1fr; gap: 10px; padding: 17px 4px; border-bottom: 1px solid rgba(153,187,211,.1); }
.code-line b { color: #4b718b; font: 500 .78rem ui-monospace, monospace; }
.code-line span { color: #c4d2dc; font-size: .94rem; }
.panel-result { margin-top: 22px; padding: 22px; border-radius: 12px; background: rgba(45,212,191,.08); }
.panel-result span { display: block; color: var(--teal); font: 600 .7rem ui-monospace, monospace; letter-spacing: .16em; }
.panel-result strong { display: block; margin-top: 6px; font-size: 1.25rem; }

.section { padding: 100px 0; border-top: 1px solid var(--line); }
.section-heading { max-width: 750px; margin-bottom: 46px; }
.section-heading.compact { margin-bottom: 36px; }
.section-heading > p:last-child, .about-copy > p { color: var(--muted); }
.service-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.service-card { min-height: 235px; padding: 32px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255,255,255,.025); transition: border-color .2s ease, transform .2s ease; }
.service-card:hover { transform: translateY(-3px); border-color: rgba(45,212,191,.42); }
.service-card p { max-width: 500px; margin: 0; color: var(--muted); }
.card-index { display: block; margin-bottom: 34px; color: var(--teal); font: 600 .76rem ui-monospace, monospace; }
.about { background: #091827; }
.about-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 90px; }
.about-copy > p { margin-top: 4px; font-size: 1.06rem; }
.values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 34px; }
.values div { padding: 20px 16px; border-left: 2px solid var(--teal); background: rgba(255,255,255,.025); }
.values strong, .values span { display: block; }
.values span { margin-top: 4px; color: #8fa5b6; font-size: .84rem; }
.process-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin: 0; padding: 0; background: var(--line); list-style: none; }
.process-list li { min-height: 225px; padding: 28px; background: var(--navy); }
.process-list > li > span { display: block; margin-bottom: 48px; color: var(--teal); font: 600 .78rem ui-monospace, monospace; }
.process-list p { margin: 0; color: var(--muted); font-size: .92rem; }
.faq { background: #091827; }
.faq-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; }
.faq-list details { border-top: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; padding: 22px 36px 22px 0; cursor: pointer; font-weight: 700; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 4px; color: var(--teal); font-size: 1.4rem; font-weight: 400; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list p { margin: -4px 0 22px; color: var(--muted); }
.contact { padding: 86px 0; background: var(--teal); color: #05201d; }
.contact .eyebrow { color: #075e54; }
.contact h2 { max-width: 720px; margin-bottom: 12px; }
.contact p { max-width: 690px; margin-bottom: 0; }
.contact-inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, 410px); gap: 54px; align-items: center; }
.contact-card { padding: 22px; border: 1px solid rgba(5,32,29,.22); border-radius: 14px; background: rgba(255,255,255,.18); box-shadow: 0 20px 48px rgba(5,32,29,.1); }
.contact-company strong, .contact-company span, .email-link span, .email-link strong, .qr-wrap span { display: block; }
.contact-company span { margin-top: 2px; font-size: .84rem; opacity: .7; }
.email-link { display: block; margin-top: 18px; padding: 14px 16px; border: 1px solid rgba(5,32,29,.18); border-radius: 9px; transition: background .2s ease, transform .2s ease; }
.email-link:hover { transform: translateY(-2px); background: rgba(255,255,255,.24); }
.email-link span { font-size: .78rem; opacity: .7; }
.email-link strong { margin-top: 1px; overflow-wrap: anywhere; font-size: 1rem; }
.address-block { margin-top: 16px; padding: 0 2px; }
.address-block span, .address-block strong { display: block; }
.address-block span { font-size: .78rem; opacity: .7; }
.address-block strong { margin-top: 1px; font-size: .94rem; }
.qr-wrap { display: grid; grid-template-columns: 112px 1fr; gap: 16px; align-items: center; margin-top: 18px; }
.qr-wrap img { display: block; width: 112px; height: auto; aspect-ratio: 520 / 547; padding: 5px; border-radius: 8px; background: #fff; }
.qr-wrap span { margin-top: 2px; font-size: .82rem; opacity: .68; }
footer { padding: 28px 0; color: #849bad; font-size: .84rem; }
.footer-inner { display: flex; justify-content: space-between; gap: 24px; }
.footer-inner a:hover, .footer-legal a:hover { color: var(--teal); }
.footer-legal { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px 24px; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--line); text-align: center; }

@media (max-width: 860px) {
  .menu-button { display: inline-flex; }
  nav { display: none; position: absolute; left: 20px; right: 20px; top: 68px; flex-direction: column; align-items: stretch; gap: 0; padding: 10px; border: 1px solid var(--line); border-radius: 12px; background: #0b1d31; box-shadow: 0 20px 50px rgba(0,0,0,.3); }
  nav.open { display: flex; }
  nav a { padding: 11px 12px; }
  .nav-cta { border: 0; border-radius: 6px; background: rgba(45,212,191,.1); color: var(--teal); }
  .hero { padding: 78px 0 80px; }
  .hero-grid, .about-grid, .faq-grid, .contact-inner { grid-template-columns: 1fr; gap: 44px; }
  .service-grid { grid-template-columns: 1fr; }
  .process-list { grid-template-columns: repeat(2, 1fr); }
  .values { grid-template-columns: 1fr; }
  .contact-card { width: min(100%, 420px); }
}

@media (max-width: 540px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .site-header .container { width: calc(100% - 28px); }
  .brand { font-size: .9rem; }
  .brand-mark { width: 34px; height: 34px; }
  h1 { font-size: clamp(2.25rem, 12vw, 3.2rem); line-height: 1.16; }
  h2 { font-size: 2rem; }
  .hero { padding-top: 62px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .hero-points { flex-wrap: wrap; gap: 8px 18px; }
  .section { padding: 76px 0; }
  .service-card { min-height: auto; padding: 25px; }
  .card-index { margin-bottom: 24px; }
  .process-list { grid-template-columns: 1fr; }
  .process-list li { min-height: auto; }
  .process-list > li > span { margin-bottom: 24px; }
  .footer-inner { flex-direction: column; gap: 4px; }
  .contact-card { width: 100%; padding: 18px; }
  .qr-wrap { grid-template-columns: 104px 1fr; }
  .qr-wrap img { width: 104px; }
}

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