:root {
  --ink: #09252c;
  --ink-soft: #365158;
  --navy: #061b24;
  --teal: #0b4b4f;
  --jade: #2b7a70;
  --gold: #bf9150;
  --gold-light: #e6c991;
  --paper: #f5f3ed;
  --line: rgba(9, 37, 44, .14);
  --white: #fff;
  --container: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "PingFang SC", "Microsoft YaHei", sans-serif; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; }
button { font: inherit; }
.container { width: min(calc(100% - 48px), var(--container)); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 1000; left: 16px; top: -60px; padding: 12px 18px; background: white; color: var(--ink); transition: top .2s; }
.skip-link:focus { top: 16px; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 100; color: #fff; border-bottom: 1px solid rgba(255,255,255,.15); transition: .3s ease; }
.site-header.is-scrolled { background: rgba(6, 27, 36, .94); backdrop-filter: blur(16px); box-shadow: 0 12px 40px rgba(0,0,0,.12); }
.nav-wrap { height: 86px; display: flex; align-items: center; justify-content: space-between; gap: 36px; }
.brand { display: inline-flex; align-items: center; gap: 13px; flex: 0 0 auto; }
.brand img { width: 100px; height: 41px; object-fit: contain; background: #fff; }
.brand span { display: grid; gap: 2px; }
.brand strong { font-family: "Songti SC", "STSong", serif; font-size: 18px; letter-spacing: .08em; }
.brand small { color: rgba(255,255,255,.55); font-size: 8px; letter-spacing: .17em; }
.main-nav { display: flex; align-items: center; gap: 34px; font-size: 14px; }
.main-nav > a { position: relative; color: rgba(255,255,255,.75); transition: color .2s; }
.main-nav > a:not(.nav-contact)::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -12px; height: 1px; background: var(--gold-light); transition: right .25s; }
.main-nav > a:hover, .main-nav > a:focus-visible { color: #fff; }
.main-nav > a:hover::after, .main-nav > a:focus-visible::after { right: 0; }
.nav-contact { padding: 11px 18px; border: 1px solid rgba(230,201,145,.55); color: var(--gold-light) !important; }
.menu-button { display: none; width: 44px; height: 44px; padding: 10px; border: 0; color: #fff; background: transparent; }
.menu-button i { display: block; height: 1px; margin: 6px 0; background: currentColor; }

.hero { min-height: 900px; position: relative; isolation: isolate; display: flex; align-items: center; color: #fff; overflow: hidden; background: var(--navy) url("assets/hero-bg.png") center/cover no-repeat; }
.hero::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(4,23,31,.99) 0%, rgba(4,23,31,.9) 38%, rgba(4,23,31,.38) 68%, rgba(4,23,31,.62) 100%), radial-gradient(circle at 70% 42%, rgba(36,131,117,.3), transparent 45%); }
.hero::after { content: ""; position: absolute; inset: auto 0 0; height: 180px; background: linear-gradient(transparent, rgba(3,21,28,.75)); z-index: -1; }
.hero-grid { position: absolute; z-index: -1; inset: 0; opacity: .1; background-image: linear-gradient(rgba(255,255,255,.2) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.2) 1px, transparent 1px); background-size: 90px 90px; mask-image: linear-gradient(90deg, black, transparent 62%); }
.hero-content { padding-top: 120px; }
.eyebrow, .kicker { margin: 0 0 22px; color: var(--gold); font-size: 11px; font-weight: 600; letter-spacing: .23em; }
.eyebrow { display: flex; align-items: center; color: var(--gold-light); }
.eyebrow span { width: 38px; height: 1px; margin-right: 14px; background: currentColor; }
.hero h1, .section h2, .quality h2, .contact h2 { margin: 0; font-family: "Songti SC", "STSong", serif; font-weight: 600; }
.hero h1 { max-width: 800px; font-size: clamp(48px, 6vw, 82px); line-height: 1.25; letter-spacing: .025em; }
.hero h1 em { color: var(--gold-light); font-style: normal; }
.hero-lead { max-width: 620px; margin: 30px 0 0; color: rgba(255,255,255,.68); font-size: 17px; font-weight: 300; line-height: 2; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 42px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 24px; border: 1px solid transparent; font-size: 14px; transition: .25s; }
.button-primary { gap: 40px; color: #0a282c; background: var(--gold-light); }
.button-primary:hover { background: #f1dbb0; transform: translateY(-2px); }
.button-ghost { color: rgba(255,255,255,.8); border-color: rgba(255,255,255,.25); }
.button-ghost:hover { border-color: rgba(255,255,255,.6); background: rgba(255,255,255,.06); }
.hero-meta { display: flex; gap: 62px; margin-top: 78px; }
.hero-meta div { display: grid; gap: 3px; }
.hero-meta strong { color: var(--gold-light); font-family: "Songti SC", "STSong", serif; font-size: 20px; font-weight: 600; }
.hero-meta span { color: rgba(255,255,255,.45); font-size: 11px; letter-spacing: .08em; }
.hero-note { position: absolute; right: 30px; bottom: 110px; margin: 0; color: rgba(255,255,255,.28); font-size: 9px; letter-spacing: .28em; writing-mode: vertical-rl; }

.section { padding: 140px 0; }
.section-heading h2, .title-row h2, .quality h2, .contact h2 { font-size: clamp(36px, 4.2vw, 56px); line-height: 1.35; letter-spacing: .03em; }
.about { background: #fff; }
.about-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 100px; }
.section-heading { position: relative; }
.section-heading::after { content: ""; position: absolute; top: 8px; right: -44px; width: 1px; height: 160px; background: var(--line); }
.about-copy { padding-top: 34px; }
.about-copy > p { max-width: 720px; margin: 0; color: var(--ink-soft); font-size: 15px; line-height: 2.15; }
.about-copy .lead { margin-bottom: 22px; color: var(--ink); font-family: "Songti SC", "STSong", serif; font-size: 22px; line-height: 1.85; }
.principles { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 54px; border-top: 1px solid var(--line); }
.principles div { position: relative; display: grid; gap: 5px; padding: 26px 20px 0 0; }
.principles span { position: absolute; top: 28px; right: 26px; color: rgba(9,37,44,.18); font-size: 11px; }
.principles strong { font-family: "Songti SC", "STSong", serif; font-size: 19px; }
.principles small { color: #7f9195; font-size: 12px; }

.services { background: var(--paper); }
.title-row { display: flex; align-items: end; justify-content: space-between; gap: 50px; margin-bottom: 62px; }
.title-row > p { max-width: 410px; margin: 0 0 8px; color: var(--ink-soft); font-size: 14px; line-height: 1.9; }
.service-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 14px; }
.service-card { min-height: 390px; position: relative; display: flex; flex-direction: column; justify-content: space-between; padding: 34px; border: 1px solid var(--line); background: rgba(255,255,255,.55); transition: .3s; overflow: hidden; }
.service-card::after { content: ""; position: absolute; width: 180px; height: 180px; right: -90px; top: -90px; border-radius: 50%; border: 1px solid rgba(191,145,80,.25); transition: .3s; }
.service-card:hover { border-color: rgba(191,145,80,.55); transform: translateY(-7px); box-shadow: 0 24px 50px rgba(20,51,54,.1); }
.service-card:hover::after { transform: scale(1.25); }
.service-featured { color: #fff; border: 0; background: var(--teal); }
.service-featured p { color: rgba(255,255,255,.65) !important; }
.card-index { color: var(--gold); font-size: 11px; letter-spacing: .1em; }
.service-icon { width: 58px; height: 58px; display: grid; place-items: center; margin-top: auto; margin-bottom: 36px; border-radius: 50%; background: rgba(191,145,80,.1); }
.service-icon svg { width: 30px; fill: none; stroke: var(--gold); stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.service-card h3 { margin: 0 0 14px; font-family: "Songti SC", "STSong", serif; font-size: 25px; font-weight: 600; }
.service-card p { margin: 0; color: var(--ink-soft); font-size: 13px; line-height: 1.95; }

.quality { position: relative; color: #fff; background: #082b31; overflow: hidden; }
.quality::after { content: ""; position: absolute; inset: 0; opacity: .12; background-image: radial-gradient(circle at 1px 1px, white 1px, transparent 0); background-size: 38px 38px; mask-image: linear-gradient(90deg, black, transparent 60%); }
.quality-layout { position: relative; z-index: 1; min-height: 760px; display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 90px; }
.quality-visual { min-height: 540px; position: relative; display: grid; place-items: center; }
.quality-visual::before, .quality-visual::after { content: ""; position: absolute; border: 1px solid rgba(230,201,145,.2); border-radius: 50%; }
.quality-visual::before { width: 430px; height: 430px; }
.quality-visual::after { width: 320px; height: 320px; border-style: dashed; animation: rotate 24s linear infinite; }
.quality-seal { width: 250px; aspect-ratio: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; border: 1px solid rgba(255,255,255,.25); border-radius: 50%; text-align: center; background: rgba(255,255,255,.04); backdrop-filter: blur(10px); box-shadow: 0 0 70px rgba(50,153,138,.18); }
.quality-seal span { color: var(--gold-light); font-size: 9px; letter-spacing: .3em; }
.quality-seal strong { margin: 13px 0; font-family: "Songti SC", "STSong", serif; font-size: 32px; line-height: 1.35; }
.quality-seal small { color: rgba(255,255,255,.45); font-size: 10px; }
.orb { position: absolute; border-radius: 50%; filter: blur(2px); background: radial-gradient(circle at 35% 30%, rgba(255,255,255,.35), rgba(40,150,131,.22) 35%, rgba(10,50,52,.05) 70%); }
.orb-one { width: 80px; height: 80px; left: 15%; top: 17%; }
.orb-two { width: 38px; height: 38px; right: 15%; bottom: 20%; }
.kicker-light { color: var(--gold-light); }
.quality-copy > p:not(.kicker) { max-width: 540px; margin: 28px 0 40px; color: rgba(255,255,255,.6); font-size: 14px; line-height: 2; }
.quality ul { margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.12); }
.quality li { display: flex; gap: 24px; padding: 20px 0; border-bottom: 1px solid rgba(255,255,255,.12); }
.quality li > span { padding-top: 3px; color: var(--gold); font-size: 10px; }
.quality li div { display: grid; gap: 5px; }
.quality li strong { font-family: "Songti SC", "STSong", serif; font-size: 16px; }
.quality li small { color: rgba(255,255,255,.43); font-size: 12px; }

.honors { background: #fff; }
.honor-list { border-top: 1px solid var(--line); }
.honor-item { display: grid; grid-template-columns: 120px 1fr auto; align-items: center; gap: 30px; min-height: 150px; border-bottom: 1px solid var(--line); transition: .25s; }
.honor-item:hover { padding-inline: 20px; background: #f6f3eb; }
.honor-item > span { color: var(--gold); font-family: "Songti SC", "STSong", serif; font-size: 22px; }
.honor-item small { color: #8a9a9d; font-size: 10px; letter-spacing: .18em; }
.honor-item h3 { margin: 9px 0 0; font-family: "Songti SC", "STSong", serif; font-size: 24px; font-weight: 600; }
.honor-item b { color: rgba(9,37,44,.22); font-size: 10px; letter-spacing: .17em; }

.contact { padding: 100px 0; background: linear-gradient(135deg, #0c4b4f, #071e27); }
.contact-card { display: grid; grid-template-columns: 1.2fr 1fr; align-items: end; gap: 80px; color: #fff; }
.contact-details { border-left: 1px solid rgba(255,255,255,.16); padding-left: 70px; }
.contact-details a, .contact-details address { display: grid; gap: 8px; padding: 23px 0; font-style: normal; border-bottom: 1px solid rgba(255,255,255,.13); }
.contact-details small { color: var(--gold-light); font-size: 10px; letter-spacing: .15em; }
.contact-details strong { font-family: "Songti SC", "STSong", serif; font-size: 30px; font-weight: 500; }
.contact-details span { color: rgba(255,255,255,.72); font-size: 14px; line-height: 1.8; }

.site-footer { color: rgba(255,255,255,.52); background: #061820; }
.footer-top { display: flex; align-items: center; justify-content: space-between; gap: 70px; padding-block: 52px; border-bottom: 1px solid rgba(255,255,255,.1); }
.brand-footer { color: #fff; }
.footer-top > p { max-width: 580px; margin: 0; font-size: 11px; line-height: 1.9; }
.footer-bottom { min-height: 74px; display: flex; align-items: center; justify-content: space-between; font-size: 11px; }
.footer-bottom a:hover { color: var(--gold-light); }

.reveal { opacity: 1; transform: none; }
@keyframes rotate { to { transform: rotate(360deg); } }

@media (max-width: 960px) {
  .nav-wrap { height: 74px; }
  .menu-button { display: block; }
  .main-nav { position: absolute; top: 74px; left: 0; right: 0; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 15px 24px 26px; background: rgba(6,27,36,.98); }
  .main-nav.is-open { display: flex; }
  .main-nav a { padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,.08); }
  .nav-contact { margin-top: 10px; text-align: center; border: 1px solid rgba(230,201,145,.45) !important; }
  .hero { min-height: 820px; }
  .about-layout, .quality-layout, .contact-card { grid-template-columns: 1fr; gap: 60px; }
  .section-heading::after { display: none; }
  .service-grid { grid-template-columns: 1fr 1fr; }
  .service-featured { grid-column: 1 / -1; min-height: 330px; }
  .quality-layout { padding: 100px 0; }
  .quality-visual { min-height: 450px; }
  .contact-details { padding-left: 0; border-left: 0; }
}

@media (max-width: 640px) {
  .container { width: min(calc(100% - 32px), var(--container)); }
  .brand strong { font-size: 15px; }
  .brand small { font-size: 6px; }
  .brand img { width: 78px; height: 32px; }
  .hero { min-height: 760px; }
  .hero-content { padding-top: 100px; }
  .hero h1 { font-size: 42px; }
  .hero-lead { font-size: 14px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-meta { gap: 26px; margin-top: 50px; }
  .hero-meta strong { font-size: 16px; }
  .hero-note { display: none; }
  .section { padding: 92px 0; }
  .about-layout { gap: 20px; }
  .about-copy { padding-top: 10px; }
  .about-copy .lead { font-size: 18px; }
  .principles { grid-template-columns: 1fr; gap: 8px; }
  .principles div { padding: 18px 0; border-bottom: 1px solid var(--line); }
  .title-row { display: block; margin-bottom: 40px; }
  .title-row > p { margin-top: 20px; }
  .service-grid { grid-template-columns: 1fr; }
  .service-featured { grid-column: auto; }
  .service-card { min-height: 330px; }
  .quality-visual { min-height: 360px; transform: scale(.82); }
  .quality-copy { margin-top: -40px; }
  .honor-item { grid-template-columns: 70px 1fr; gap: 14px; min-height: 130px; }
  .honor-item b { display: none; }
  .honor-item h3 { font-size: 18px; }
  .contact { padding: 80px 0; }
  .footer-top, .footer-bottom { align-items: flex-start; flex-direction: column; gap: 24px; }
  .footer-bottom { justify-content: center; padding-block: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}