:root {
  --navy: #061731;
  --navy-2: #0a2855;
  --blue: #1359a5;
  --gold: #d6a642;
  --gold-light: #f2d786;
  --ink: #152238;
  --muted: #66758a;
  --line: #dfe6ef;
  --soft: #f4f7fb;
  --white: #fff;
  --shadow: 0 16px 45px rgba(8, 31, 64, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 112px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.container { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; left: 12px; top: -70px; z-index: 999; padding: 10px 16px; background: #fff; color: #061731; border-radius: 6px; }
.skip-link:focus { top: 12px; }

.notice { background: #031128; color: #bfcbe0; font-size: 13px; }
.notice-inner { min-height: 36px; display: flex; justify-content: space-between; align-items: center; gap: 20px; }

.site-header { position: sticky; top: 0; z-index: 90; background: rgba(255,255,255,.97); border-bottom: 1px solid rgba(6,23,49,.09); box-shadow: 0 5px 18px rgba(5,25,54,.05); backdrop-filter: blur(12px); }
.header-inner { min-height: 75px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 0; }
.brand-mark { width: 46px; height: 46px; flex: 0 0 46px; display: grid; place-items: center; border-radius: 12px 4px 12px 4px; color: #fff; font: 800 17px/1 Georgia, serif; letter-spacing: 1px; background: linear-gradient(145deg, #d9aa42, #8c6215); box-shadow: 0 7px 18px rgba(178,125,25,.22); }
.brand strong { display: block; color: var(--navy); font-size: 19px; line-height: 1.3; }
.brand small { display: block; margin-top: 3px; color: #7c899a; font-size: 9px; line-height: 1.2; letter-spacing: 1.1px; }
.header-service { display: inline-flex; min-height: 42px; align-items: center; justify-content: center; padding: 0 20px; color: #fff; background: var(--navy-2); border-radius: 5px; font-weight: 700; transition: transform .2s, background .2s; }
.header-service:hover { transform: translateY(-2px); background: var(--blue); }
.site-nav { border-top: 1px solid #edf1f6; }
.nav-scroll { min-height: 42px; display: flex; justify-content: center; align-items: center; gap: clamp(16px, 3vw, 38px); overflow-x: auto; scrollbar-width: none; }
.nav-scroll::-webkit-scrollbar { display: none; }
.nav-scroll a { flex: none; color: #435167; font-size: 14px; font-weight: 650; }
.nav-scroll a:hover { color: var(--blue); }

.hero { position: relative; min-height: 600px; display: grid; align-items: center; overflow: hidden; color: #fff; background: #071a38 url("images/banner-preview.jpg") center 17% / cover no-repeat; isolation: isolate; }
.hero::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(2,13,33,.98) 0%, rgba(4,27,61,.94) 43%, rgba(4,30,68,.68) 72%, rgba(4,25,55,.72) 100%); }
.hero::after { content: ""; position: absolute; inset: auto 0 0; height: 120px; z-index: -1; background: linear-gradient(transparent, rgba(3,18,40,.55)); }
.hero-inner { padding-block: 76px 90px; }
.hero-copy { max-width: 690px; }
.eyebrow, .section-kicker { margin: 0 0 9px; color: var(--gold); font-size: 13px; line-height: 1.4; font-weight: 800; letter-spacing: 2.4px; }
.hero h1 { margin: 0; color: var(--gold-light); font-size: clamp(45px, 6vw, 76px); line-height: 1.05; letter-spacing: .04em; text-shadow: 0 4px 28px rgba(0,0,0,.28); }
.hero h2 { margin: 16px 0 0; max-width: 650px; font-size: clamp(25px, 3vw, 40px); line-height: 1.3; letter-spacing: .02em; }
.hero-desc { max-width: 630px; margin: 21px 0 0; color: #d9e3f2; font-size: 17px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 24px; }
.hero-tags span { padding: 6px 13px; border: 1px solid rgba(242,215,134,.42); border-radius: 999px; color: #f5e6b8; background: rgba(255,255,255,.07); font-size: 13px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 31px; }
.button { min-height: 49px; display: inline-flex; align-items: center; justify-content: center; padding: 0 25px; border: 1px solid transparent; border-radius: 6px; font-weight: 800; line-height: 1.2; transition: transform .2s, box-shadow .2s, background .2s; }
.button:hover { transform: translateY(-2px); }
.button-gold { color: #261b06; background: linear-gradient(135deg, #f6df92, #d6a43b); box-shadow: 0 10px 28px rgba(219,169,67,.25); }
.button-ghost { color: #fff; border-color: rgba(255,255,255,.4); background: rgba(255,255,255,.06); }

.quick-info { position: relative; z-index: 3; margin-top: -45px; }
.quick-grid { display: grid; grid-template-columns: repeat(4, 1fr); padding: 22px 24px; background: #fff; border-radius: 12px; box-shadow: var(--shadow); }
.quick-grid > div { min-width: 0; display: flex; align-items: center; gap: 14px; padding: 5px 22px; border-right: 1px solid var(--line); }
.quick-grid > div:last-child { border-right: 0; }
.quick-icon { width: 39px; height: 39px; flex: 0 0 39px; display: grid; place-items: center; border-radius: 50%; color: var(--gold); background: #0a244b; font-weight: 900; }
.quick-grid p { margin: 0; line-height: 1.35; }
.quick-grid strong { display: block; color: var(--navy); font-size: 15px; }
.quick-grid small { display: block; margin-top: 4px; color: var(--muted); font-size: 12px; }

.section { padding: 96px 0; }
.section-soft { background: var(--soft); }
.section-dark { color: #fff; background: linear-gradient(135deg, #05152e, #0a2d60); }
.split { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(320px, .8fr); gap: 60px; align-items: center; }
.intro-grid h2, .area-copy h2, .environment-grid h2, .faq-intro h2 { margin: 0 0 20px; color: var(--navy); font-size: clamp(28px, 3vw, 40px); line-height: 1.25; }
.intro-grid > div > p:not(.section-kicker), .area-copy > p:not(.section-kicker), .environment-grid > div > p:not(.section-kicker), .faq-intro > p:not(.section-kicker) { color: var(--muted); }
.info-card { overflow: hidden; border: 1px solid #dce4ee; border-radius: 10px; background: #fff; box-shadow: 0 16px 35px rgba(11,41,79,.09); }
.info-card > span { display: block; padding: 15px 22px; color: #fff; background: var(--navy-2); font-weight: 800; }
.info-card dl { margin: 0; padding: 8px 22px; }
.info-card dl div { display: flex; justify-content: space-between; gap: 20px; padding: 13px 0; border-bottom: 1px solid #edf1f5; }
.info-card dl div:last-child { border: 0; }
.info-card dt { color: var(--muted); }
.info-card dd { margin: 0; color: var(--navy); font-weight: 750; text-align: right; }

.section-heading { max-width: 700px; margin: 0 auto 42px; text-align: center; }
.section-heading h2 { margin: 0; color: var(--navy); font-size: clamp(30px, 3.3vw, 42px); line-height: 1.25; }
.section-heading > p:last-child { margin: 13px 0 0; color: var(--muted); }
.section-heading.light h2 { color: #fff; }
.section-heading.light > p:last-child { color: #b8c7db; }
.service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.service-grid article { min-height: 210px; position: relative; overflow: hidden; padding: 28px 24px; border: 1px solid #dfe6ef; border-radius: 10px; background: #fff; transition: transform .2s, box-shadow .2s, border-color .2s; }
.service-grid article:hover { transform: translateY(-5px); border-color: #d4b05a; box-shadow: 0 15px 32px rgba(11,42,82,.1); }
.service-grid article b { position: absolute; right: 16px; top: 5px; color: rgba(16,69,128,.07); font: 800 58px/1 Georgia, serif; }
.service-grid h3 { position: relative; margin: 38px 0 10px; color: var(--navy); font-size: 18px; }
.service-grid h3::before { content: ""; position: absolute; left: 0; top: -19px; width: 34px; height: 3px; background: var(--gold); }
.service-grid p { margin: 0; color: var(--muted); font-size: 14px; }

.area-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(360px, .95fr); align-items: center; gap: 70px; }
.area-cards { display: grid; gap: 12px; }
.area-cards > div { position: relative; padding: 18px 22px 18px 28px; border: 1px solid var(--line); border-radius: 8px; background: #fff; box-shadow: 0 9px 23px rgba(8,34,69,.06); }
.area-cards > div::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 5px; border-radius: 8px 0 0 8px; background: var(--gold); }
.area-cards strong { display: block; color: var(--navy); font-size: 17px; }
.area-cards span { color: var(--muted); font-size: 14px; }

.steps { counter-reset: none; list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin: 0; padding: 0; }
.steps li { min-height: 225px; padding: 27px 23px; border: 1px solid rgba(255,255,255,.13); border-radius: 10px; background: rgba(255,255,255,.06); }
.steps li > span { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 50%; color: #07162f; background: var(--gold-light); font: 800 18px/1 Georgia, serif; }
.steps h3 { margin: 23px 0 8px; color: #fff; font-size: 18px; }
.steps p { margin: 0; color: #b9c8da; font-size: 14px; }

.environment-grid { display: grid; grid-template-columns: minmax(350px, .95fr) minmax(0, 1fr); align-items: center; gap: 66px; }
.environment-media { overflow: hidden; aspect-ratio: 1.1 / 1; border: 8px solid #fff; border-radius: 11px; box-shadow: var(--shadow); background: #e8edf4; }
.environment-media img { width: 100%; height: 100%; object-fit: cover; object-position: top center; }
.check-list { list-style: none; margin: 27px 0 0; padding: 0; }
.check-list li { position: relative; margin: 12px 0; padding-left: 31px; color: #3e4d62; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 1px; width: 21px; height: 21px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--blue); font-size: 12px; font-weight: 900; }

.advantage-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.advantage-grid article { padding: 28px 22px; border: 1px solid #dfe6ee; border-radius: 10px; background: #fff; text-align: center; }
.advantage-grid span { width: 50px; height: 50px; display: grid; place-items: center; margin: 0 auto 18px; border-radius: 50%; color: var(--gold-light); background: var(--navy-2); font-size: 19px; font-weight: 900; }
.advantage-grid h3 { margin: 0 0 8px; color: var(--navy); font-size: 17px; }
.advantage-grid p { margin: 0; color: var(--muted); font-size: 14px; }

.faq-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 70px; align-items: start; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; cursor: pointer; list-style: none; padding: 20px 42px 20px 0; color: var(--navy); font-weight: 750; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 4px; top: 17px; width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; color: var(--blue); background: #edf3fa; font-size: 20px; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: -3px 0 20px; padding-right: 30px; color: var(--muted); }

.contact-section { padding: 0 0 90px; }
.contact-card { display: flex; align-items: center; justify-content: space-between; gap: 35px; padding: 42px 50px; border-radius: 12px; color: #fff; background: linear-gradient(120deg, #071a38, #0c3975); box-shadow: var(--shadow); }
.contact-card h2 { margin: 0; font-size: clamp(26px, 3vw, 38px); line-height: 1.25; }
.contact-card p:not(.section-kicker) { margin: 8px 0 0; color: #c4d1e3; }

.site-footer { color: #aab8cb; background: #031027; }
.footer-grid { display: flex; justify-content: space-between; gap: 50px; padding-block: 48px 38px; }
.footer-grid strong { color: #fff; font-size: 18px; }
.footer-grid p { max-width: 500px; margin: 7px 0 0; font-size: 14px; }
.footer-links { display: flex; flex-wrap: wrap; align-content: start; justify-content: flex-end; gap: 12px 25px; }
.footer-links a { color: #d6dfeb; font-size: 14px; }
.copyright { padding: 15px 20px; border-top: 1px solid rgba(255,255,255,.08); text-align: center; font-size: 12px; }
.floating-service { position: fixed; right: 24px; bottom: 28px; z-index: 80; min-height: 48px; display: inline-flex; align-items: center; gap: 8px; padding: 0 18px; border: 1px solid rgba(255,255,255,.22); border-radius: 999px; color: #fff; background: #0b4d93; box-shadow: 0 12px 30px rgba(3,27,58,.3); font-weight: 750; }
.floating-service span { color: #80e5b0; }
.mobile-dock { display: none; }

@media (max-width: 980px) {
  .service-grid, .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .split, .area-layout, .environment-grid, .faq-layout { gap: 40px; }
  .quick-grid > div { padding-inline: 12px; }
}

@media (max-width: 767px) {
  html { scroll-padding-top: 102px; }
  body { padding-bottom: calc(68px + env(safe-area-inset-bottom)); font-size: 15px; }
  .container { width: min(100% - 28px, 680px); }
  .notice-inner { min-height: 32px; justify-content: center; text-align: center; }
  .notice-inner span:last-child { display: none; }
  .site-header { top: 0; }
  .header-inner { min-height: 64px; gap: 10px; }
  .brand { gap: 9px; }
  .brand-mark { width: 39px; height: 39px; flex-basis: 39px; font-size: 14px; }
  .brand strong { max-width: 180px; font-size: 15px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .brand small { display: none; }
  .header-service { min-height: 40px; padding: 0 14px; font-size: 13px; }
  .site-nav { background: #fff; }
  .nav-scroll { width: 100%; min-height: 40px; justify-content: flex-start; padding: 0 14px; gap: 24px; }
  .nav-scroll a { font-size: 13px; }
  .hero { min-height: 525px; background-position: center top; }
  .hero::before { background: linear-gradient(90deg, rgba(2,13,33,.97), rgba(4,28,63,.86)); }
  .hero-inner { padding-block: 58px 84px; }
  .eyebrow, .section-kicker { font-size: 11px; letter-spacing: 1.8px; }
  .hero h1 { font-size: clamp(40px, 13vw, 57px); }
  .hero h2 { margin-top: 13px; font-size: 24px; }
  .hero-desc { margin-top: 17px; font-size: 15px; line-height: 1.75; }
  .hero-tags { margin-top: 20px; gap: 7px; }
  .hero-tags span { padding: 5px 10px; font-size: 12px; }
  .hero-actions { margin-top: 25px; gap: 10px; }
  .hero-actions .button { flex: 1 1 calc(50% - 5px); min-width: 132px; padding-inline: 13px; }
  .quick-info { margin-top: -40px; }
  .quick-grid { grid-template-columns: repeat(2, 1fr); padding: 10px; border-radius: 10px; }
  .quick-grid > div { gap: 9px; padding: 13px 10px; border-right: 0; border-bottom: 1px solid var(--line); }
  .quick-grid > div:nth-last-child(-n+2) { border-bottom: 0; }
  .quick-grid > div:nth-child(odd) { border-right: 1px solid var(--line); }
  .quick-icon { width: 32px; height: 32px; flex-basis: 32px; font-size: 13px; }
  .quick-grid strong { font-size: 13px; }
  .quick-grid small { font-size: 10px; }
  .section { padding: 68px 0; }
  .split, .area-layout, .environment-grid, .faq-layout { grid-template-columns: 1fr; gap: 30px; }
  .intro-grid h2, .area-copy h2, .environment-grid h2, .faq-intro h2 { margin-bottom: 14px; font-size: 27px; }
  .info-card { order: 2; }
  .section-heading { margin-bottom: 28px; text-align: left; }
  .section-heading h2 { font-size: 29px; }
  .service-grid, .advantage-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .service-grid article { min-height: 185px; padding: 21px 16px; }
  .service-grid article b { right: 10px; font-size: 45px; }
  .service-grid h3 { margin-top: 34px; font-size: 16px; }
  .service-grid p { font-size: 13px; line-height: 1.65; }
  .area-cards > div { padding: 15px 17px 15px 22px; }
  .steps { grid-template-columns: 1fr; gap: 12px; }
  .steps li { min-height: 0; display: flex; gap: 16px; padding: 20px 18px; }
  .steps li > span { width: 38px; height: 38px; flex: 0 0 38px; }
  .steps h3 { margin: 0 0 5px; font-size: 16px; }
  .environment-media { aspect-ratio: 1.15 / 1; border-width: 5px; }
  .environment-grid > div:last-child { order: -1; }
  .advantage-grid article { padding: 22px 13px; }
  .advantage-grid span { width: 42px; height: 42px; margin-bottom: 13px; }
  .advantage-grid h3 { font-size: 15px; }
  .advantage-grid p { font-size: 12px; line-height: 1.6; }
  .faq-intro p:last-child { margin-bottom: 0; }
  .faq-list summary { padding-block: 17px; font-size: 15px; }
  .faq-list details p { font-size: 14px; }
  .contact-section { padding: 0 0 62px; }
  .contact-card { display: block; padding: 29px 22px; }
  .contact-card h2 { font-size: 26px; }
  .contact-card .button { width: 100%; margin-top: 22px; }
  .footer-grid { display: block; padding-block: 37px 30px; }
  .footer-links { justify-content: flex-start; margin-top: 25px; }
  .floating-service { display: none; }
  .mobile-dock { position: fixed; left: 0; right: 0; bottom: 0; z-index: 110; display: grid; grid-template-columns: repeat(3, 1fr); padding-bottom: env(safe-area-inset-bottom); border-top: 1px solid #dbe3ed; background: rgba(255,255,255,.98); box-shadow: 0 -8px 25px rgba(6,31,64,.12); }
  .mobile-dock a { min-height: 62px; display: grid; place-items: center; align-content: center; gap: 1px; color: #526176; font-size: 11px; line-height: 1.2; }
  .mobile-dock a span { font-size: 19px; }
  .mobile-dock .dock-service { color: #fff; background: linear-gradient(135deg, #0b4f98, #082f61); font-weight: 800; }
}

@media (max-width: 380px) {
  .brand strong { max-width: 145px; font-size: 14px; }
  .header-service { padding-inline: 10px; }
  .hero-actions { display: grid; grid-template-columns: 1fr; }
  .service-grid, .advantage-grid { grid-template-columns: 1fr; }
  .service-grid article { min-height: 165px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}