/* zong industry - beiyang */:root{--stage:#1B2A41;--stage2:#243652;--ink:#1E2836;--ink-soft:#5C6B7A;--paper:#F8FAFC;--gold:#F26419;--gold-deep:#C74E0E;--line:rgba(27,42,65,.2);--line-soft:#DFE5EC;--font-display:"Noto Serif SC","Songti SC",serif;--font-body:"PingFang SC","Microsoft YaHei",sans-serif;--rad:6px;--sh1:0 6px 24px rgba(10,20,16,.08);--sh2:0 18px 48px rgba(10,20,16,.16)}body{margin:0;font-family:var(--font-body);font-size:15px;line-height:1.85;color:var(--ink);background:var(--paper)}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;margin:0;line-height:1.35}.wrap{max-width:1200px;margin:0 auto;padding-left:28px;padding-right:28px}.skip{position:fixed;top:-80px;left:10px;background:#fff;padding:10px;z-index:200}.skip:focus{top:10px}.utility{display:none}.site-header{position:sticky;top:0;z-index:90;background:rgba(250,250,248,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line-soft)}.site-header .wrap{display:flex;align-items:center;justify-content:space-between;min-height:72px;gap:22px}.brand-line strong{font-family:var(--font-display);font-size:21px;color:var(--stage);letter-spacing:.04em}.brand-line small{font-size:9px;letter-spacing:.28em;color:#8A9490}.brand-line{display:flex;align-items:baseline;gap:10px;white-space:nowrap}#main-nav{display:flex;gap:22px;font-size:13.5px;font-weight:600}#main-nav a{padding:26px 0;border-bottom:2px solid transparent}#main-nav a:hover{color:var(--gold-deep);border-bottom-color:var(--gold)}.header-cta{background:var(--stage);color:#fff;padding:9px 18px;font-size:12.5px;border-radius:2px}.header-cta:hover{background:var(--gold-deep)}.menu-toggle{display:none;border:1px solid var(--line-soft);background:#fff;padding:7px 14px;font-size:12.5px}.eyebrow{font-size:10.5px;letter-spacing:.3em;text-transform:uppercase;font-weight:700;color:#C74E0E;margin:0 0 12px}.breadcrumbs{padding:18px 0 0;font-size:11.5px;color:#9AA69E}.breadcrumbs ol{display:flex;gap:8px;list-style:none;margin:0;padding:0}.list-hero-band{position:relative;background:var(--stage) center 40%/cover no-repeat;padding:56px 34px 40px;border-radius:4px;overflow:hidden;margin-top:14px}.list-hero-band::before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,color-mix(in srgb,var(--stage) 88%,transparent) 30%,color-mix(in srgb,var(--stage) 45%,transparent))}.list-hero-band>*{position:relative;z-index:1}.list-hero-band .eyebrow{color:var(--gold)}.list-hero-band h1{color:#fff;font-size:clamp(26px,3vw,40px)}.list-hero-band p{color:rgba(255,255,255,.8);max-width:660px;margin:12px 0 0;font-size:14.5px}.section{padding:26px 0 56px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:22px}.section-heading h2{font-size:clamp(22px,2.2vw,30px);color:var(--stage)}.text-link{color:var(--gold-deep);font-weight:700;font-size:13px}.guide-grid{display:grid;grid-template-columns:1fr;gap:0}.guide-card{display:grid;grid-template-columns:minmax(210px,300px) 1fr;padding:0;background:#fff;border:1px solid var(--line-soft);border-radius:6px;overflow:hidden;margin:0 0 20px;box-shadow:var(--sh1);transition:box-shadow .25s,transform .25s}.guide-card:hover{box-shadow:var(--sh2);transform:translateY(-3px)}.guide-card .gc-img{min-height:200px;background:#EEE}.guide-card .gc-img img{width:100%;height:100%;object-fit:cover;transition:transform 3.5s ease}.guide-card:hover .gc-img img{transform:scale(1.045)}.guide-card .meta{padding:22px 28px 0;color:#C74E0E}.guide-card h3{padding:6px 28px 0;font-size:18px}.guide-card p{padding:10px 28px 0;font-size:14px;margin:0}.guide-card .text-link{padding:0 28px 22px;margin-top:10px;display:inline-block}
.lc-intro{background:var(--stage);border-bottom:2px solid var(--gold);padding:32px 0}
.lc-intro-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:40px;align-items:center}
.lc-lead{color:rgba(255,255,255,.85);font-size:14.5px;line-height:2;margin:0}
.lc-facts{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.lc-fact b{font-family:var(--font-display);font-size:23px;color:var(--gold);display:block;line-height:1.15}
.lc-fact span{font-size:11px;letter-spacing:.1em;opacity:.7}
.lc-adv{max-width:1200px;margin:6px auto 32px;padding:24px 30px;background:#fff;
  border-left:3px solid var(--gold);box-shadow:var(--sh1);border-radius:0 4px 4px 0}
.lc-adv p{color:var(--ink-soft);font-size:13.5px;margin:0 0 10px;line-height:2}
.article-detail{max-width:880px;margin:0 auto;padding:30px 0 6px}
.article-detail h1{font-size:clamp(25px,2.6vw,36px);color:var(--stage)}
.rich-text{font-size:15px;line-height:2;color:#33424E}
.rich-text h3{font-size:20px;color:var(--stage);margin:34px 0 12px;padding-left:12px;border-left:3px solid var(--gold)}
.rich-text li b{color:var(--stage)}
.site-footer{background:var(--stage);color:rgba(255,255,255,.72);margin-top:64px}
.site-footer .wrap{padding-top:48px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:36px}
.footer-title{font-family:var(--font-display);color:#fff;font-size:19px}
.site-footer h2{font-size:12.5px;color:var(--gold);letter-spacing:.14em}
.site-footer p,.footer-links a{font-size:13px;line-height:2.1}
.footer-links{display:flex;flex-direction:column;gap:8px}
.footer-bottom{display:flex;justify-content:space-between;border-top:1px solid rgba(255,255,255,.12);padding:15px 0 20px;font-size:11px}
.mobile-contact{display:none}
@media(max-width:960px){.guide-card{grid-template-columns:1fr}.guide-card .gc-img{min-height:190px}
  .footer-grid{grid-template-columns:1fr;gap:26px}#main-nav{display:none}
  #main-nav.is-open{display:flex;flex-direction:column;position:absolute;top:72px;left:0;right:0;
  background:var(--paper);padding:12px 28px;z-index:95}#main-nav.is-open a{padding:12px 0;border:0}
  .menu-toggle{display:block}.lc-intro-grid{grid-template-columns:1fr}}

/* arch D masthead array */
.hd-mast{background:var(--stage);color:#fff;padding:84px 0 58px;border-bottom:4px solid var(--gold)}
.hd-big{font-size:clamp(32px,4.6vw,60px);color:#fff;letter-spacing:.02em}
.hd-sub{color:rgba(255,255,255,.8);max-width:640px;margin-top:16px}
.hd-array{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:arr}
.hd-card{counter-increment:arr;background:#fff;border:1px solid var(--line-soft);border-radius:6px;
  overflow:hidden;position:relative;padding-bottom:16px;transition:.25s}
.hd-card:hover{transform:translateY(-3px);box-shadow:var(--sh2)}
.hd-card:before{content:counter(arr,decimal-leading-zero);position:absolute;top:10px;left:12px;z-index:2;
  font-family:ui-monospace;font-size:11px;background:var(--gold);color:#fff;padding:3px 8px;border-radius:2px}
.hd-card .gc-img{height:140px;background:#EEE;display:block}
.hd-card .gc-img img{width:100%;height:100%;object-fit:cover}
.hd-card h3{padding:14px 16px 0;font-size:14px}
.hd-card h3 a{color:var(--stage)}
.hd-card p{padding:8px 16px 0;font-size:12.5px;color:var(--ink-soft);margin:0}
.hd-toc .hd-tocrow{display:grid;grid-template-columns:1fr auto;gap:4px 20px;padding:17px 6px;
  border-bottom:1px solid var(--line-soft)}
.hd-tocrow b{font-size:14.5px;color:var(--stage)}
.hd-tocrow span{grid-column:1;font-size:12.5px;color:var(--ink-soft)}
.hd-tocrow em{grid-row:1/3;align-self:center;font-style:normal;font-size:12px;color:var(--gold-deep);font-weight:700}
.hd-tocrow:hover{background:rgba(0,0,0,.025)}
@media(max-width:960px){.hd-array{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.hd-array{grid-template-columns:1fr}}