:root {
  --ink: #081226;
  --ink-soft: #101d38;
  --panel: #10213f;
  --panel-light: #14294d;
  --line: rgba(170, 203, 242, .18);
  --muted: #9badc9;
  --text: #f2f6ff;
  --teal: #2ee6d6;
  --teal-dark: #119f9b;
  --gold: #f6d58b;
  --white: #fff;
  --max: 1180px;
  --radius: 18px;
  --shadow: 0 18px 48px rgba(0, 0, 0, .18);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
body.page-light { background: #f4f7fb; color: var(--ink); }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
img, svg { max-width: 100%; }
:focus-visible { outline: 3px solid var(--teal); outline-offset: 4px; }

.skip-link {
  position: fixed; left: 1rem; top: -4rem; z-index: 100;
  padding: .6rem .9rem; background: var(--teal); color: var(--ink); border-radius: 6px;
}
.skip-link:focus { top: 1rem; }
.site-header {
  position: fixed; inset: 0 0 auto; z-index: 20;
  transition: background .25s ease, border-color .25s ease, box-shadow .25s ease;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled, .page-light .site-header {
  background: rgba(8, 18, 38, .92); border-color: var(--line); box-shadow: 0 10px 30px rgba(0,0,0,.12);
  backdrop-filter: blur(16px);
}
.nav-wrap { max-width: var(--max); height: 78px; margin: auto; padding: 0 24px; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-mark { width: 35px; height: 35px; position: relative; display: grid; place-items: center; }
.brand-mark::before { content: ""; width: 20px; height: 20px; border: 1px solid var(--teal); transform: rotate(45deg); display: block; animation: compassSpin 6s ease-in-out infinite; }
.brand-mark::after { content: "✦"; position: absolute; color: var(--gold); font-size: 16px; animation: starSpin 6s ease-in-out infinite; }
.brand-name { font-weight: 800; letter-spacing: .12em; line-height: 1.1; }
.brand-sub { display: block; color: var(--muted); font-size: 8px; font-weight: 500; letter-spacing: .08em; margin-top: 3px; }
.main-nav { margin-left: auto; display: flex; gap: 25px; align-items: center; }
.main-nav a { color: #d5e0f4; font-size: 14px; padding: 10px 0; position: relative; }
.main-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 2px; height: 2px; background: var(--teal); transition: right .2s ease; }
.main-nav a:hover::after, .main-nav a[aria-current="page"]::after { right: 0; }
.main-nav a[aria-current="page"] { color: var(--teal); }
.nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; border: 1px solid transparent; border-radius: 8px; padding: 11px 18px; font-weight: 700; font-size: 14px; transition: transform .2s ease, background .2s ease, border-color .2s ease; cursor: pointer; }
.nav-cta, .button-primary { background: var(--teal); color: var(--ink); }
.nav-cta:hover, .button:hover { transform: translateY(-2px); }
.nav-cta:hover, .button-primary:hover { background: #7cf5e8; }
.button-outline { border-color: rgba(255,255,255,.34); color: var(--text); background: transparent; }
.button-outline:hover { border-color: var(--teal); color: var(--teal); }
.menu-toggle { display: none; margin-left: auto; border: 0; background: transparent; color: var(--text); padding: 8px; cursor: pointer; }
.menu-toggle svg { width: 25px; height: 25px; }

.hero { min-height: 700px; position: relative; overflow: hidden; display: flex; align-items: center; background: radial-gradient(circle at 78% 20%, rgba(46,230,214,.12), transparent 30%), radial-gradient(circle at 18% 86%, rgba(35,82,156,.3), transparent 36%), var(--ink); }
.hero::before { content: ""; position: absolute; inset: 0; opacity: .3; background-image: linear-gradient(rgba(105,151,211,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(105,151,211,.12) 1px, transparent 1px); background-size: 72px 72px; mask-image: linear-gradient(to bottom, #000, transparent 80%); animation: heroGridDrift 24s linear infinite; }
.hero::after { content: ""; position: absolute; width: 560px; height: 560px; right: -170px; top: -160px; border: 1px solid rgba(46,230,214,.2); border-radius: 50%; box-shadow: 0 0 0 42px rgba(46,230,214,.025), 0 0 0 84px rgba(46,230,214,.018); animation: heroRingDrift 38s linear infinite; }
.hero-inner { width: 100%; max-width: var(--max); padding: 150px 24px 90px; margin: auto; position: relative; z-index: 1; }
.eyebrow { color: var(--teal); letter-spacing: .18em; font-size: 12px; font-weight: 700; text-transform: uppercase; }
.hero h1 { max-width: 720px; margin: 22px 0 20px; font-size: clamp(40px, 6vw, 76px); line-height: 1.13; letter-spacing: .02em; }
.hero h1 span { color: var(--teal); }
.hero-copy { max-width: 630px; margin: 0; color: #c1d0e8; font-size: 18px; }
.hero-actions { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 13px; }
.hero-visual { position: absolute; right: clamp(4%, 8vw, 12%); top: 33%; width: 290px; height: 290px; border-radius: 50%; border: 1px solid rgba(46,230,214,.35); opacity: .7; animation: visualFloat 9s ease-in-out infinite; }
.hero-visual::before, .hero-visual::after { content: ""; position: absolute; inset: 26px; border: 1px solid rgba(246,213,139,.35); border-radius: 50%; }
.hero-visual::after { inset: 72px; border-color: rgba(46,230,214,.45); }
.orbit-dot { position: absolute; width: 8px; height: 8px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 18px var(--teal); top: 44px; right: 19px; }
.hero-visual .orbit-line { position: absolute; left: 50%; top: -20px; height: 330px; border-left: 1px dashed rgba(255,255,255,.24); transform: rotate(42deg); }
.starfield { position: absolute; inset: 0; pointer-events: none; }
.starfield i { position: absolute; width: 2px; height: 2px; background: #dff8ff; border-radius: 50%; opacity: .6; }
.starfield i:nth-child(1) { left: 12%; top: 24%; } .starfield i:nth-child(2) { left: 40%; top: 19%; } .starfield i:nth-child(3) { left: 70%; top: 14%; } .starfield i:nth-child(4) { left: 80%; top: 67%; } .starfield i:nth-child(5) { left: 28%; top: 76%; } .starfield i:nth-child(6) { left: 56%; top: 58%; }

.section { padding: 105px 24px; }
.section-tight { padding: 72px 24px; }
.section-inner { max-width: var(--max); margin: auto; }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 28px; margin-bottom: 40px; }
.section-kicker { color: var(--teal-dark); font-size: 12px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.dark .section-kicker, .section-dark .section-kicker { color: var(--teal); }
.section h2 { margin: 9px 0 0; font-size: clamp(28px, 4vw, 45px); line-height: 1.25; letter-spacing: .03em; }
.section-intro { max-width: 520px; color: #6b7b96; margin: 0; }
.dark { background: #0d1b35; }
.section-dark { background: #0d1b35; color: var(--text); }
.light { background: #f4f7fb; color: var(--ink); }

.trust-bar { background: #0a1730; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.trust-grid { max-width: var(--max); margin: auto; padding: 19px 24px; display: grid; grid-template-columns: repeat(5, 1fr); gap: 15px; }
.trust-item { display: flex; align-items: center; gap: 11px; color: #b9c8df; font-size: 13px; }
.trust-icon { width: 27px; height: 27px; display: grid; place-items: center; border: 1px solid rgba(46,230,214,.45); color: var(--teal); border-radius: 50%; font-size: 12px; }
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cards-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.service-card, .case-card, .info-card { border: 1px solid rgba(109,145,195,.2); background: rgba(255,255,255,.035); border-radius: var(--radius); padding: 29px; transition: transform .25s ease, border-color .25s ease, background .25s ease; }
.light .service-card, .light .case-card, .light .info-card { background: #fff; border-color: #dfe7f2; box-shadow: 0 10px 25px rgba(18,47,84,.04); }
.service-card:hover, .case-card:hover, .info-card:hover { transform: translateY(-5px); border-color: rgba(46,230,214,.55); }
.card-icon { width: 42px; height: 42px; display: grid; place-items: center; color: var(--teal); border: 1px solid rgba(46,230,214,.4); border-radius: 10px; margin-bottom: 20px; }
.service-card h3, .case-card h3, .info-card h3 { margin: 0 0 9px; font-size: 21px; }
.service-card p, .case-card p, .info-card p { margin: 0; color: var(--muted); font-size: 14px; }
.light .service-card p, .light .case-card p, .light .info-card p { color: #60708b; }
.card-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 20px; }
.tag { display: inline-flex; padding: 4px 9px; border-radius: 100px; border: 1px solid rgba(46,230,214,.3); color: var(--teal); font-size: 12px; }
.light .tag { color: var(--teal-dark); border-color: rgba(17,159,155,.28); }

.reason-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.reason-item { border-top: 1px solid #cbd8e8; padding-top: 17px; }
.reason-no { color: var(--teal-dark); font-weight: 800; letter-spacing: .08em; font-size: 14px; }
.reason-item h3 { margin: 12px 0 7px; font-size: 18px; }
.reason-item p { margin: 0; color: #63738c; font-size: 14px; }
.timeline { display: grid; grid-template-columns: repeat(4, 1fr); position: relative; gap: 24px; }
.timeline::before { content: ""; position: absolute; top: 19px; left: 8%; right: 8%; height: 1px; background: rgba(46,230,214,.36); }
.timeline-step { position: relative; z-index: 1; }
.step-dot { width: 38px; height: 38px; background: #0d1b35; border: 1px solid var(--teal); border-radius: 50%; display: grid; place-items: center; color: var(--teal); font-weight: 700; }
.timeline-step h3 { margin: 21px 0 7px; font-size: 18px; }
.timeline-step p { margin: 0; color: var(--muted); font-size: 13px; }
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.metric { padding: 29px; background: #10213f; }
.metric strong { display: block; color: var(--teal); font-size: 36px; line-height: 1.2; }
.metric span { color: #bdcbe0; display: block; margin-top: 5px; font-size: 14px; }
.cta-band { background: linear-gradient(105deg, #123265, #0d1b35 68%); border-top: 1px solid rgba(46,230,214,.2); border-bottom: 1px solid rgba(46,230,214,.2); }
.cta-inner { max-width: var(--max); padding: 68px 24px; margin: auto; display: flex; justify-content: space-between; align-items: center; gap: 25px; }
.cta-inner h2 { margin: 0; font-size: clamp(26px, 4vw, 40px); }
.cta-inner p { color: #b9c8df; margin: 10px 0 0; }

.page-hero { padding: 160px 24px 82px; background: radial-gradient(circle at 80% 20%, rgba(46,230,214,.1), transparent 32%), #0d1b35; }
.page-hero-inner { max-width: var(--max); margin: auto; }
.page-hero h1 { margin: 15px 0 13px; font-size: clamp(36px, 5vw, 62px); line-height: 1.2; }
.page-hero p { margin: 0; max-width: 660px; color: #b9c8df; font-size: 17px; }
.content-narrow { max-width: 840px; }
.prose p { color: #61718b; }
.prose p:first-child { font-size: 19px; color: #263b5b; }
.quote-line { border-left: 3px solid var(--teal-dark); padding: 4px 0 4px 21px; margin: 28px 0; color: #304766; font-size: 20px; }
.principles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 34px; }
.principle { padding: 22px; border: 1px solid #dfe7f2; background: #fff; }
.principle strong { display: block; margin-bottom: 4px; }
.principle span { color: #697990; font-size: 14px; }
.map-placeholder { min-height: 320px; border: 1px solid #dbe6f3; background: linear-gradient(135deg, #e8f3f4, #f5f8fc); position: relative; overflow: hidden; display: grid; place-items: center; color: #3e6681; }
.map-placeholder::before { content: ""; position: absolute; inset: -50% 30%; border: 1px dashed rgba(17,159,155,.35); transform: rotate(26deg); }
.map-marker { position: relative; text-align: center; }
.map-marker b { display: block; width: 22px; height: 22px; margin: auto auto 10px; background: var(--teal-dark); border-radius: 50% 50% 50% 0; transform: rotate(-45deg); }
.map-embed { min-height: 320px; border: 1px solid #dbe6f3; background: #e8f3f4; overflow: hidden; box-shadow: 0 12px 28px rgba(18,47,84,.08); }
.map-embed iframe { display: block; width: 100%; height: 320px; border: 0; }
.map-caption { margin: 12px 0 0; color: #687992; font-size: 13px; }
.map-caption a { color: var(--teal-dark); text-decoration: underline; text-underline-offset: 3px; }

.service-detail { display: grid; grid-template-columns: 1fr 1.5fr; gap: 42px; align-items: start; padding: 32px 0; border-bottom: 1px solid #dbe4ef; }
.service-detail:last-child { border-bottom: 0; }
.service-detail h2 { margin: 0; font-size: 28px; }
.service-detail .audience { color: var(--teal-dark); font-size: 13px; font-weight: 700; margin-top: 9px; }
.deliverables { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.deliverable { padding: 18px; background: #fff; border: 1px solid #e0e8f2; }
.deliverable strong { display: block; font-size: 14px; margin-bottom: 3px; }
.deliverable span { display: block; color: #687992; font-size: 13px; }
.feature-list { padding: 0; margin: 18px 0 0; list-style: none; display: grid; gap: 9px; }
.feature-list li { position: relative; padding-left: 22px; color: #5b6f89; }
.feature-list li::before { content: "→"; position: absolute; left: 0; color: var(--teal-dark); font-weight: 800; }
.steps-box { display: grid; gap: 10px; }
.steps-box div { padding: 16px 20px; border: 1px solid #dfe7f2; background: #fff; display: flex; gap: 16px; align-items: baseline; }
.steps-box b { color: var(--teal-dark); font-size: 13px; min-width: 55px; }
.faq { border-top: 1px solid #dbe4ef; }
.faq details { border-bottom: 1px solid #dbe4ef; padding: 21px 0; }
.faq summary { cursor: pointer; list-style: none; font-weight: 700; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--teal-dark); font-size: 20px; line-height: 1; }
.faq details[open] summary::after { content: "−"; }
.faq p { color: #61718b; margin: 13px 32px 0 0; }

.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.case-card { min-height: 245px; position: relative; overflow: hidden; }
.case-card::after { content: "示意"; position: absolute; top: 22px; right: -25px; background: var(--gold); color: #3e2b05; padding: 3px 30px; font-size: 11px; transform: rotate(35deg); }
.case-card .case-type { color: var(--teal-dark); font-size: 12px; letter-spacing: .12em; font-weight: 800; text-transform: uppercase; }
.case-card h3 { margin-top: 17px; }
.case-card .result { margin-top: 22px; color: #3b587e; }

.contact-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 64px; align-items: start; }
.contact-list { display: grid; gap: 24px; margin-top: 28px; }
.contact-item small { display: block; color: var(--teal-dark); font-weight: 800; letter-spacing: .1em; font-size: 11px; text-transform: uppercase; }
.contact-item strong, .contact-item a { display: block; margin-top: 4px; font-size: 18px; color: #203755; }
.contact-item p { margin: 3px 0 0; color: #697a91; font-size: 14px; }
.contact-form { background: #fff; border: 1px solid #dfe7f2; padding: 30px; box-shadow: var(--shadow); }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 17px; }
.field { display: grid; gap: 7px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 13px; font-weight: 700; color: #2e4666; }
.field input, .field select, .field textarea { width: 100%; border: 1px solid #cbd8e7; background: #fbfdff; color: var(--ink); border-radius: 7px; padding: 12px 13px; transition: border-color .2s ease, box-shadow .2s ease; }
.field textarea { min-height: 125px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: 0; border-color: var(--teal-dark); box-shadow: 0 0 0 3px rgba(17,159,155,.14); }
.form-hint { min-height: 24px; margin: 15px 0 0; color: var(--teal-dark); font-size: 14px; }
.form-hint.error { color: #b83f46; }
.address-block { padding: 35px; background: #10213f; color: var(--text); }
.address-block h2 { margin: 0 0 8px; }
.address-block p { color: #b9c8df; margin: 0; }

.site-footer { background: #071225; border-top: 1px solid var(--line); color: #a9b9d1; }
.footer-inner { max-width: var(--max); margin: auto; padding: 58px 24px 22px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 28px; }
.footer-brand p { max-width: 280px; color: #8093af; font-size: 13px; }
.footer-col h3 { margin: 4px 0 14px; color: #eff5ff; font-size: 14px; }
.footer-col a { display: block; color: #98aac4; font-size: 13px; margin: 8px 0; }
.footer-col a:hover { color: var(--teal); }
.footer-bottom { border-top: 1px solid rgba(174,201,235,.1); margin-top: 43px; padding-top: 18px; display: flex; justify-content: space-between; gap: 20px; font-size: 12px; color: #687b99; }
.footer-bottom span:last-child { text-align: right; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@keyframes compassSpin {
  0%, 28% { transform: rotate(45deg); }
  46%, 65% { transform: rotate(225deg); }
  83%, 100% { transform: rotate(405deg); }
}
@keyframes starSpin {
  0%, 28% { transform: rotate(0deg); }
  46%, 65% { transform: rotate(180deg); }
  83%, 100% { transform: rotate(360deg); }
}
@keyframes heroGridDrift { from { background-position: 0 0, 0 0; } to { background-position: 72px 72px, 72px 72px; } }
@keyframes heroRingDrift { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes visualFloat { 0%, 100% { transform: translate3d(0, 0, 0); } 50% { transform: translate3d(0, -12px, 0); } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; } .reveal { opacity: 1; transform: none; } }

@media (max-width: 900px) {
  .main-nav { position: absolute; top: 78px; left: 16px; right: 16px; display: none; flex-direction: column; align-items: stretch; gap: 4px; padding: 13px; background: #0b1933; border: 1px solid var(--line); border-radius: 10px; box-shadow: var(--shadow); }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 10px 12px; }
  .nav-cta { display: none; }
  .menu-toggle { display: block; }
  .hero-visual { right: -80px; top: 29%; opacity: .45; }
  .trust-grid { grid-template-columns: repeat(3, 1fr); }
  .reason-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-layout { grid-template-columns: 1fr; gap: 36px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .nav-wrap { height: 68px; padding: 0 18px; }
  .main-nav { top: 68px; }
  .brand-sub { display: none; }
  .hero { min-height: 680px; }
  .hero-inner { padding: 135px 20px 72px; }
  .hero h1 { font-size: 42px; }
  .hero-copy { font-size: 16px; }
  .hero-visual { width: 230px; height: 230px; top: 48%; right: -100px; }
  .section, .section-tight { padding: 70px 20px; }
  .section-head { display: block; margin-bottom: 28px; }
  .section-intro { margin-top: 13px; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); padding: 17px 20px; }
  .cards-3, .cards-2, .case-grid, .metrics { grid-template-columns: 1fr; }
  .reason-grid, .principles { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; gap: 24px; }
  .timeline::before { top: 19px; bottom: 19px; left: 19px; right: auto; width: 1px; height: auto; }
  .timeline-step { display: grid; grid-template-columns: 38px 1fr; column-gap: 16px; }
  .timeline-step h3 { margin: 0 0 4px; }
  .timeline-step p { grid-column: 2; }
  .cta-inner { display: block; padding: 55px 20px; }
  .cta-inner .button { margin-top: 23px; }
  .page-hero { padding: 135px 20px 62px; }
  .page-hero p { font-size: 16px; }
  .service-detail { grid-template-columns: 1fr; gap: 16px; padding: 28px 0; }
  .deliverables { grid-template-columns: 1fr; }
  .contact-form { padding: 22px 18px; }
  .form-grid { grid-template-columns: 1fr; }
  .field.full { grid-column: auto; }
  .address-block { padding: 26px 22px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 22px 17px; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
  .footer-bottom { display: block; line-height: 1.8; }
  .footer-bottom span:last-child { text-align: left; display: block; margin-top: 8px; }
}