:root {
  --ink: #071118;
  --ink-soft: #0d2029;
  --cyan: #153844;
  --mist: #a7b9b6;
  --ivory: #f3efe5;
  --paper: #fbf8f1;
  --titanium: #6f797b;
  --copper: #c68b53;
  --copper-light: #e1b87f;
  --cinnabar: #9d3f31;
  --line: rgba(198,139,83,.35);
  --shadow: 0 24px 70px rgba(2,10,14,.16);
  --max: 1200px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: #18272b; font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif; line-height: 1.75; }
body.nav-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font: inherit; }
.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.gnhsak-govcn { position: relative; }
.eyebrow { display: flex; align-items: center; gap: 12px; margin: 0 0 12px; color: var(--copper); font-size: .75rem; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 32px; height: 1px; background: currentColor; }
.section-head { display: grid; grid-template-columns: 1fr minmax(260px, 440px); gap: 50px; align-items: end; margin-bottom: 46px; }
.section-head h2, .page-title h1 { margin: 0; color: var(--ink); font-family: "Songti SC", SimSun, serif; font-size: clamp(2rem, 4vw, 3.8rem); font-weight: 500; line-height: 1.18; letter-spacing: -.035em; }
.section-head p { margin: 0; color: #627176; }
.site-header { position: fixed; inset: 0 0 auto; z-index: 100; color: white; border-bottom: 1px solid rgba(255,255,255,.12); transition: .35s ease; }
.site-header.scrolled, .inner-page .site-header { background: rgba(7,17,24,.94); box-shadow: 0 8px 35px rgba(0,0,0,.18); backdrop-filter: blur(18px); }
.header-inner { height: 82px; display: flex; align-items: center; justify-content: space-between; }
.brand img { width: 180px; height: 48px; object-fit: contain; }
.nav-list { display: flex; align-items: center; gap: 4px; margin: 0; padding: 0; list-style: none; }
.nav-list a { display: block; padding: 28px 16px 25px; color: rgba(255,255,255,.72); font-size: .9rem; border-bottom: 2px solid transparent; }
.nav-list a:hover, .nav-list a.active { color: white; border-color: var(--copper); }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 10px; color: white; background: transparent; border: 1px solid rgba(255,255,255,.25); }
.menu-toggle span { display: block; height: 1px; margin: 6px 0; background: currentColor; transition: .25s; }
.hero { min-height: 790px; color: white; background: var(--ink); overflow: hidden; }
.hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .9; }
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(4,13,19,.96) 0%, rgba(4,13,19,.88) 35%, rgba(4,13,19,.18) 72%, rgba(4,13,19,.15)); }
.hero-grid { position: relative; z-index: 2; min-height: 790px; display: grid; grid-template-columns: 55% 45%; align-items: center; padding-top: 94px; }
.hero-copy { max-width: 670px; padding-right: 40px; }
.hero-index { color: var(--copper-light); font: 700 .73rem/1.2 monospace; letter-spacing: .2em; }
.hero h1 { margin: 20px 0 24px; font-family: "Songti SC", SimSun, serif; font-size: clamp(2.8rem, 5.5vw, 5.3rem); font-weight: 500; line-height: 1.12; letter-spacing: -.055em; }
.hero-lead { max-width: 620px; margin: 0 0 32px; color: rgba(255,255,255,.68); font-size: 1.05rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 24px; border: 1px solid var(--copper); background: var(--copper); color: var(--ink); font-weight: 700; transition: .25s; }
.btn::after { content: "↗"; margin-left: 18px; }
.btn:hover { transform: translateY(-3px); background: var(--copper-light); }
.btn-ghost { color: white; background: transparent; border-color: rgba(255,255,255,.35); }
.hero-coordinates { align-self: end; justify-self: end; margin-bottom: 70px; padding: 18px 0 18px 24px; border-left: 1px solid var(--copper); color: rgba(255,255,255,.72); font: .7rem/1.9 monospace; letter-spacing: .12em; }
.hero-tags { position: absolute; z-index: 3; left: 0; bottom: 0; right: 0; border-top: 1px solid rgba(255,255,255,.16); }
.hero-tags .container { display: flex; overflow-x: auto; }
.hero-tags span { flex: 1 0 auto; padding: 17px 28px; color: rgba(255,255,255,.68); font-size: .77rem; border-left: 1px solid rgba(255,255,255,.12); }
.section { padding: 110px 0; }
.group-axis { background: var(--ivory); }
.axis-wrap { position: relative; display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid var(--copper); }
.axis-item { min-height: 230px; padding: 28px 24px 20px; border-right: 1px solid rgba(13,32,41,.13); transition: .25s; }
.axis-item:first-child { border-left: 1px solid rgba(13,32,41,.13); }
.axis-item:hover, .axis-item.is-active { color: white; background: var(--ink-soft); transform: translateY(-8px); }
.axis-no { display: block; margin-bottom: 42px; color: var(--copper); font: 700 .78rem monospace; }
.axis-item h3 { margin: 0 0 12px; font-size: 1.1rem; }
.axis-item p { margin: 0; color: #748085; font-size: .88rem; }
.axis-item:hover p, .axis-item.is-active p { color: rgba(255,255,255,.62); }
.axis-image { margin-top: 38px; height: 330px; overflow: hidden; clip-path: polygon(0 8%, 94% 0, 100% 85%, 8% 100%); }
.axis-image img { width: 100%; height: 100%; object-fit: cover; }
.service-section { color: white; background: var(--ink); }
.service-section .section-head h2 { color: white; }
.service-section .section-head p { color: rgba(255,255,255,.55); }
.matrix { display: grid; grid-template-columns: 1.25fr .75fr 1fr; grid-template-rows: 230px 260px; gap: 14px; }
.matrix-card { position: relative; overflow: hidden; padding: 30px; border: 1px solid rgba(198,139,83,.35); background: #0d222b; }
.matrix-card:first-child { grid-row: 1 / 3; }
.matrix-card:nth-child(2) { grid-column: 2 / 4; }
.matrix-card::after { content: attr(data-no); position: absolute; right: 18px; bottom: -18px; color: rgba(255,255,255,.045); font: 700 7rem/1 monospace; }
.matrix-card h3 { position: relative; z-index: 2; margin: 0 0 8px; font-size: 1.2rem; }
.matrix-card p { position: relative; z-index: 2; max-width: 400px; margin: 0; color: rgba(255,255,255,.55); }
.matrix-card.feature { display: flex; flex-direction: column; justify-content: flex-end; background: linear-gradient(0deg, rgba(4,13,18,.94), rgba(4,13,18,.12)), url('../images/tenglong-service-matrix.jpg') center/cover; }
.city-section { background: #e9e6dd; overflow: hidden; }
.city-feature { display: grid; grid-template-columns: 1.25fr .75fr; min-height: 560px; color: white; background: var(--ink-soft); box-shadow: var(--shadow); }
.city-visual { position: relative; min-height: 460px; overflow: hidden; }
.city-visual img { width: 100%; height: 100%; object-fit: cover; }
.city-visual::after { content: "CITY / MOUNTAIN / SEA"; position: absolute; left: 0; bottom: 0; padding: 16px 24px; color: var(--copper-light); background: var(--ink); font: .7rem monospace; letter-spacing: .16em; }
.city-copy { padding: 64px 48px; display: flex; flex-direction: column; justify-content: center; }
.city-copy h2 { margin: 0 0 20px; font: 500 clamp(2rem, 4vw, 3.6rem)/1.2 "Songti SC", serif; }
.city-copy p { color: rgba(255,255,255,.58); }
.topic-list { display: grid; grid-template-columns: 1fr 1fr; margin-top: 25px; border-top: 1px solid var(--line); }
.topic-list span { padding: 12px 0; border-bottom: 1px solid rgba(198,139,83,.2); color: var(--copper-light); font-size: .85rem; }
.gallery-grid { display: grid; grid-template-columns: 1.4fr .65fr .65fr; grid-template-rows: 260px 220px; gap: 16px; }
.gallery-main { grid-row: 1 / 3; position: relative; overflow: hidden; background: var(--ink); color: white; }
.gallery-main img { width: 100%; height: 100%; object-fit: cover; opacity: .75; transition: .5s; }
.gallery-main:hover img { transform: scale(1.03); opacity: .9; }
.gallery-caption { position: absolute; inset: auto 0 0; padding: 70px 30px 28px; background: linear-gradient(transparent, rgba(4,13,18,.93)); }
.gallery-caption h3 { margin: 0; font-size: 1.5rem; }
.gallery-small { padding: 26px; border-top: 2px solid var(--copper); background: #e4ded2; }
.gallery-small:nth-child(3) { background: var(--cyan); color: white; }
.gallery-small span { color: var(--copper); font: .7rem monospace; }
.gallery-small h3 { margin: 52px 0 8px; }
.gallery-small p { margin: 0; color: #6a7476; font-size: .86rem; }
.gallery-small:nth-child(3) p { color: rgba(255,255,255,.55); }
.gallery-index { grid-column: 2 / 4; display: grid; grid-template-columns: repeat(3, 1fr); background: var(--ink); color: white; }
.gallery-index div { padding: 28px; border-right: 1px solid rgba(255,255,255,.1); }
.gallery-index strong { display: block; color: var(--copper-light); font: 400 2.3rem/1 monospace; }
.gallery-index span { color: rgba(255,255,255,.5); font-size: .8rem; }
.guide { color: white; background: var(--cyan); }
.guide .section-head h2 { color: white; }
.guide .section-head p { color: rgba(255,255,255,.6); }
.steps { display: grid; grid-template-columns: repeat(5, 1fr); counter-reset: steps; }
.step { position: relative; min-height: 190px; padding: 24px 24px 24px 0; border-top: 1px solid var(--copper); counter-increment: steps; }
.step::before { content: "0" counter(steps); display: block; margin-bottom: 48px; color: var(--copper-light); font: .75rem monospace; }
.step:not(:last-child)::after { content: "→"; position: absolute; top: 20px; right: 20px; color: var(--copper); }
.step h3 { margin: 0 0 8px; }
.step p { margin: 0; color: rgba(255,255,255,.5); font-size: .82rem; }
.news-track { position: relative; max-width: 920px; margin-left: auto; }
.news-track::before { content: ""; position: absolute; left: 115px; top: 0; bottom: 0; width: 1px; background: var(--line); }
.news-row { display: grid; grid-template-columns: 90px 1fr; gap: 50px; padding: 0 0 42px; }
.news-date { color: var(--copper); font: .75rem/1.5 monospace; }
.news-body { position: relative; padding: 0 0 38px; border-bottom: 1px solid #ddd7ca; }
.news-body::before { content: ""; position: absolute; left: -55px; top: 7px; width: 9px; height: 9px; background: var(--paper); border: 2px solid var(--copper); transform: rotate(45deg); }
.news-body h3 { margin: 0 0 8px; font-size: 1.2rem; }
.news-body p { margin: 0; color: #69777a; }
.faq-list { max-width: 920px; margin-left: auto; border-top: 1px solid #cfc7b8; }
.faq-item { border-bottom: 1px solid #cfc7b8; }
.faq-question { width: 100%; display: grid; grid-template-columns: 64px 1fr 32px; align-items: center; padding: 22px 0; color: var(--ink); text-align: left; background: none; border: 0; cursor: pointer; }
.faq-question span:first-child { color: var(--copper); font: .74rem monospace; }
.faq-question i { font-style: normal; font-size: 1.4rem; transition: .25s; }
.faq-answer { max-height: 0; overflow: hidden; color: #647175; transition: max-height .3s ease; }
.faq-answer p { margin: 0; padding: 0 64px 24px; }
.faq-item.open .faq-answer { max-height: 180px; }
.faq-item.open .faq-question i { transform: rotate(45deg); }
.page-hero { padding: 176px 0 90px; color: white; background: radial-gradient(circle at 80% 20%, rgba(35,89,102,.55), transparent 35%), var(--ink); }
.breadcrumbs { display: flex; gap: 10px; margin-bottom: 36px; color: rgba(255,255,255,.5); font-size: .8rem; }
.breadcrumbs a:hover { color: var(--copper-light); }
.page-title { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: end; }
.page-title h1 { color: white; }
.page-title p { margin: 0; color: rgba(255,255,255,.56); }
.intro-panel { display: grid; grid-template-columns: .75fr 1.25fr; gap: 80px; }
.intro-aside { padding: 30px 0; border-top: 2px solid var(--copper); color: #69777a; }
.intro-content h2 { margin: 0 0 25px; font: 500 clamp(2rem,4vw,3.6rem)/1.2 "Songti SC", serif; color: var(--ink); }
.intro-content p { color: #607075; }
.pillar-grid { display: grid; grid-template-columns: repeat(3,1fr); border: 1px solid #d7d1c4; }
.pillar { min-height: 260px; padding: 32px; border-right: 1px solid #d7d1c4; border-bottom: 1px solid #d7d1c4; }
.pillar:nth-child(3n) { border-right: 0; }
.pillar .axis-no { margin-bottom: 52px; }
.pillar h3 { margin: 0 0 10px; }
.pillar p { margin: 0; color: #6a787b; }
.dark-band { background: var(--ink); color: white; }
.dark-band .section-head h2 { color: white; }
.dark-band .section-head p { color: rgba(255,255,255,.56); }
.feature-split { display: grid; grid-template-columns: 1fr 1fr; min-height: 480px; }
.feature-split img { width: 100%; height: 100%; object-fit: cover; }
.feature-copy { padding: 60px; background: var(--ink-soft); }
.feature-copy h2 { margin: 0 0 20px; font: 500 2.5rem/1.2 "Songti SC",serif; }
.feature-copy p { color: rgba(255,255,255,.6); }
.link-list { margin-top: 28px; border-top: 1px solid var(--line); }
.link-list a { display: flex; justify-content: space-between; padding: 14px 0; border-bottom: 1px solid rgba(198,139,83,.18); }
.link-list a:hover { color: var(--copper-light); }
.editorial-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 18px; }
.editorial-lead { grid-row: span 2; min-height: 570px; padding: 42px; display: flex; flex-direction: column; justify-content: end; color: white; background: linear-gradient(0deg, rgba(4,13,18,.96), rgba(4,13,18,.18)), url('../images/tenglong-city-landscape.jpg') center/cover; }
.editorial-lead h2 { margin: 12px 0; font: 500 2.6rem/1.2 "Songti SC",serif; }
.editorial-card { min-height: 276px; padding: 34px; background: #e8e2d7; border-top: 2px solid var(--copper); }
.editorial-card:nth-child(3) { background: var(--cyan); color: white; }
.editorial-card h2 { margin: 55px 0 10px; font-size: 1.5rem; }
.editorial-card p { color: #657276; }
.editorial-card:nth-child(3) p { color: rgba(255,255,255,.58); }
.news-list { display: grid; gap: 0; border-top: 1px solid #cec7b9; }
.news-card { display: grid; grid-template-columns: 140px 1fr 32px; gap: 30px; align-items: start; padding: 32px 0; border-bottom: 1px solid #cec7b9; }
.news-card time { color: var(--copper); font: .75rem monospace; }
.news-card h2 { margin: 0 0 8px; font-size: 1.3rem; }
.news-card p { margin: 0; color: #687679; }
.news-card .arrow { color: var(--copper); font-size: 1.4rem; }
.site-footer { padding: 70px 0 30px; color: rgba(255,255,255,.58); background: #040c10; }
.footer-top { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 70px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer-brand img { width: 180px; height: 48px; object-fit: contain; margin-bottom: 18px; }
.footer-brand p { max-width: 390px; }
.footer-title { margin: 0 0 18px; color: white; font-size: .85rem; }
.footer-links { display: grid; grid-template-columns: 1fr 1fr; gap: 7px 20px; }
.footer-links a:hover { color: var(--copper-light); }
.footer-meta { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 25px; padding-top: 26px; font-size: .76rem; }
.footer-meta p { margin: 0; }
.police-record { display: inline-flex; align-items: center; gap: 7px; }
.police-record img { width: 20px; height: 20px; }
.sitemap-link { color: var(--copper-light); }
.back-top { position: fixed; z-index: 90; right: 24px; bottom: 24px; width: 46px; height: 46px; color: white; background: var(--ink-soft); border: 1px solid var(--line); opacity: 0; pointer-events: none; transform: translateY(10px); transition: .25s; }
.back-top.show { opacity: 1; pointer-events: auto; transform: none; }
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (max-width: 920px) {
  .menu-toggle { display: block; }
  .site-nav { position: fixed; inset: 82px 0 0; padding: 25px 20px; background: rgba(7,17,24,.98); transform: translateX(100%); transition: .3s; }
  .nav-open .site-nav { transform: none; }
  .nav-list { display: block; }
  .nav-list a { padding: 16px 8px; font-size: 1.05rem; border-bottom: 1px solid rgba(255,255,255,.1); }
  .hero, .hero-grid { min-height: 720px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-coordinates { display: none; }
  .section-head, .page-title, .intro-panel { grid-template-columns: 1fr; gap: 20px; }
  .axis-wrap { grid-template-columns: repeat(2, 1fr); }
  .axis-item:last-child { grid-column: 1 / 3; }
  .matrix { grid-template-columns: 1fr 1fr; grid-template-rows: auto; }
  .matrix-card:first-child { grid-row: auto; }
  .matrix-card:nth-child(2) { grid-column: auto; }
  .matrix-card { min-height: 220px; }
  .city-feature { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr 1fr; }
  .gallery-main { grid-row: auto; grid-column: 1 / 3; min-height: 420px; }
  .gallery-index { grid-column: 1 / 3; }
  .steps { grid-template-columns: repeat(2,1fr); }
  .pillar-grid { grid-template-columns: 1fr 1fr; }
  .pillar:nth-child(3n) { border-right: 1px solid #d7d1c4; }
  .feature-split { grid-template-columns: 1fr; }
  .feature-split img { height: 400px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / 3; }
}
@media (max-width: 620px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .header-inner { height: 70px; }
  .brand img { width: 145px; height: 40px; }
  .site-nav { top: 70px; }
  .hero, .hero-grid { min-height: 690px; }
  .hero-copy { padding-right: 0; }
  .hero h1 { font-size: 2.65rem; }
  .hero-tags span { padding: 13px 18px; }
  .section { padding: 75px 0; }
  .section-head { margin-bottom: 30px; }
  .axis-wrap, .matrix, .pillar-grid { grid-template-columns: 1fr; }
  .axis-item, .axis-item:last-child { grid-column: auto; min-height: auto; }
  .axis-no { margin-bottom: 20px; }
  .axis-image { height: 220px; }
  .city-copy { padding: 38px 25px; }
  .gallery-grid { display: block; }
  .gallery-main { min-height: 400px; margin-bottom: 14px; }
  .gallery-small { min-height: 210px; margin-bottom: 14px; }
  .gallery-index { display: grid; margin-bottom: 14px; }
  .gallery-index div { padding: 20px 15px; }
  .steps { grid-template-columns: 1fr; }
  .step { min-height: auto; }
  .news-track::before { left: 76px; }
  .news-row { grid-template-columns: 62px 1fr; gap: 28px; }
  .news-body::before { left: -33px; }
  .faq-answer p { padding-left: 0; padding-right: 0; }
  .page-hero { padding: 130px 0 65px; }
  .feature-split img { height: 280px; }
  .feature-copy { padding: 35px 25px; }
  .editorial-grid { grid-template-columns: 1fr; }
  .editorial-lead { min-height: 460px; }
  .news-card { grid-template-columns: 1fr 24px; gap: 10px; }
  .news-card time { grid-column: 1 / 3; }
  .footer-top { grid-template-columns: 1fr; gap: 35px; }
  .footer-brand { grid-column: auto; }
  .footer-meta { display: grid; }
}
@media (prefers-reduced-motion: reduce) { *,*::before,*::after { scroll-behavior: auto !important; transition: none !important; } .reveal { opacity: 1; transform: none; } }