:root{
  --bg:#f4f7fb;
  --bg-soft:#edf4f9;
  --surface:#ffffff;
  --surface-2:#f8fbff;
  --text:#142238;
  --muted:#5f6d84;
  --primary:#0e2f50;
  --primary-2:#0b7c87;
  --accent:#f4b544;
  --line:#d8e4ef;
  --shadow:0 18px 48px rgba(14,47,80,.10);
  --shadow-soft:0 10px 24px rgba(14,47,80,.08);
  --radius:20px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:
radial-gradient(circle at top left,rgba(11,124,135,.10),transparent 32%),
radial-gradient(circle at top right,rgba(14,47,80,.08),transparent 28%),
linear-gradient(180deg,#f7fafc 0%,#eef4f7 100%);
}
body::before{content:"";position:fixed;inset:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.02) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.02) 1px,transparent 1px);background-size:24px 24px;opacity:.18}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
.container{width:min(1180px,calc(100% - 36px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.86);backdrop-filter:blur(14px);border-bottom:1px solid rgba(216,228,239,.86)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 0}
.brand{display:flex;align-items:center;gap:14px;min-width:0}
.brand-mark{width:50px;height:50px;border-radius:16px;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;font-weight:800;display:grid;place-items:center;box-shadow:var(--shadow-soft);letter-spacing:.04em}
.brand-text strong{display:block;font-size:18px;line-height:1.1}
.brand-text small{display:block;color:var(--muted);font-size:12px;margin-top:4px}
.main-nav{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.main-nav a{color:var(--muted);font-size:14px;padding:10px 14px;border-radius:999px;transition:.25s ease}
.main-nav a.active,.main-nav a:hover{color:var(--primary);background:rgba(14,47,80,.06)}
.nav-cta{padding:12px 18px !important;border-radius:999px;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff !important;font-weight:700;box-shadow:var(--shadow-soft)}
.nav-toggle{display:none;border:0;background:transparent;font-size:28px;color:var(--primary)}
.hero{padding:62px 0 30px}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:34px;align-items:center}
.hero-copy .eyebrow,.kicker{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:999px;background:rgba(11,124,135,.10);color:var(--primary-2);font-weight:700;font-size:13px;border:1px solid rgba(11,124,135,.14)}
.hero-copy h1{font-size:clamp(34px,5vw,54px);line-height:1.1;margin:18px 0 16px;color:var(--primary);letter-spacing:-.02em}
.hero-copy p{font-size:18px;line-height:1.9;color:var(--muted);margin:0;max-width:92%}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 22px;border-radius:14px;font-weight:700;transition:.25s ease}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:var(--shadow-soft)}
.btn-secondary{background:rgba(255,255,255,.88);border:1px solid var(--line);color:var(--primary)}
.hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:30px}
.hero-points div,.stat-card,.service-card,.adv-card,.faq-card,.contact-card,.content-card,.sidebar-card,.case-card,.article-card,.category-card{background:rgba(255,255,255,.88);border:1px solid rgba(216,228,239,.94);border-radius:var(--radius);box-shadow:var(--shadow-soft);backdrop-filter:blur(6px)}
.hero-points div{padding:18px}
.hero-points strong{display:block;font-size:18px;color:var(--primary);margin-bottom:6px}
.hero-points span{display:block;color:var(--muted);font-size:14px;line-height:1.7}
.hero-media,.banner-media,.card-cover,.case-cover,.category-cover{position:relative;overflow:hidden;border-radius:30px;box-shadow:var(--shadow);border:1px solid rgba(216,228,239,.9)}
.hero-media{height:620px}
.banner-media{height:360px}
.hero-media img,.banner-media img,.card-cover img,.case-cover img,.category-cover img{width:100%;height:100%;object-fit:cover;transform:scale(1.01)}
.media-overlay,.card-cover-text,.image-tag{position:absolute;inset:auto 0 0 0;padding:18px 20px;background:linear-gradient(180deg,rgba(5,10,30,0) 0%,rgba(5,10,30,.78) 100%);color:#fff;font-weight:800}
.media-overlay{inset:0;display:flex;align-items:center;justify-content:center;text-align:center;padding:28px;background:linear-gradient(180deg,rgba(14,47,80,.16),rgba(14,47,80,.56))}
.media-overlay span{font-size:clamp(28px,4vw,42px);line-height:1.2;max-width:78%;text-shadow:0 10px 24px rgba(0,0,0,.36)}
.section{padding:38px 0}
.section-heading{margin-bottom:24px}
.section-heading h2{font-size:clamp(28px,3vw,38px);line-height:1.24;margin:16px 0 10px;color:var(--primary);letter-spacing:-.02em}
.section-heading p{max-width:860px;color:var(--muted);line-height:1.85;font-size:16px;margin:0}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.service-card,.adv-card,.faq-card,.stat-card,.contact-card,.content-card,.sidebar-card{padding:24px}
.service-card h3,.adv-card h3,.faq-card h3,.contact-card h3,.content-card h3,.sidebar-card h3{margin:0 0 10px;color:var(--primary);font-size:22px}
.service-card p,.adv-card p,.faq-card p,.contact-card p,.content-card p,.sidebar-card p{margin:0;color:var(--muted);line-height:1.85}
.article-card,.case-card,.category-card{overflow:hidden;transition:.25s ease}
.article-card:hover,.case-card:hover,.category-card:hover,.mini-list a:hover{transform:translateY(-3px);box-shadow:0 22px 44px rgba(14,47,80,.12)}
.card-cover{display:block;height:230px}
.card-cover-text{font-size:22px;line-height:1.35}
.card-body{padding:22px}
.card-body h3{margin:0 0 10px;font-size:22px;line-height:1.5;color:var(--primary)}
.card-body p{margin:0 0 14px;color:var(--muted);line-height:1.85}
.tag-list{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0 0}
.tag-list span{padding:7px 12px;border-radius:999px;background:rgba(11,124,135,.10);color:var(--primary-2);font-size:12px;font-weight:700;border:1px solid rgba(11,124,135,.12)}
.text-link{display:inline-flex;gap:8px;align-items:center;margin-top:16px;color:var(--primary-2);font-weight:700}
.banner-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:28px;align-items:center}
.metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.stat-card{padding:22px}
.stat-card strong{display:block;font-size:34px;color:var(--primary);margin-bottom:6px}
.stat-card span{display:block;color:var(--muted);line-height:1.75}
.content-wrap{padding:28px 0 64px}
.page-hero{padding:40px 0 12px}
.page-title{font-size:clamp(32px,4vw,44px);line-height:1.18;color:var(--primary);margin:16px 0 12px;letter-spacing:-.02em}
.page-lead{font-size:18px;color:var(--muted);line-height:1.9;max-width:940px}
.breadcrumb{display:flex;gap:10px;align-items:center;flex-wrap:wrap;color:#6b7891;font-size:14px}
.breadcrumb a{color:#3f6284}
.page-main{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px}
.article-main{background:rgba(255,255,255,.94);border:1px solid rgba(216,228,239,.96);border-radius:28px;padding:30px;box-shadow:var(--shadow)}
.article-main h1{font-size:clamp(30px,4vw,40px);line-height:1.24;margin:0 0 18px;color:var(--primary)}
.article-main .meta{display:flex;gap:16px;flex-wrap:wrap;color:#60718b;font-size:14px;margin-bottom:18px}
.article-main .summary{font-size:18px;line-height:1.9;color:#425169;background:#f3f8fb;border:1px solid rgba(216,228,239,.95);padding:18px 20px;border-radius:18px;margin:0 0 24px}
.article-content h2{font-size:30px;line-height:1.35;margin:28px 0 14px;color:var(--primary)}
.article-content p{line-height:1.95;color:#39475f;font-size:17px;margin:0 0 16px}
.article-content ul{padding-left:20px;color:#39475f;line-height:1.9}
.article-cover{margin:18px 0 26px}
.article-cover .banner-media{height:390px;border-radius:24px}
.sidebar-card .btn{width:100%;margin-top:14px}
.sidebar-card + .sidebar-card{margin-top:18px}
.related-list a{display:block;padding:12px 0;border-top:1px dashed var(--line);color:#22345c;line-height:1.6}
.related-list a:first-child{border-top:0;padding-top:0}
.related-list small{display:block;color:#6d7894;margin-top:6px}
.faq-list details{background:rgba(255,255,255,.9);border:1px solid var(--line);border-radius:16px;padding:18px 20px;box-shadow:var(--shadow-soft)}
.faq-list details + details{margin-top:12px}
.faq-list summary{cursor:pointer;font-weight:700;color:var(--primary);list-style:none}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list p{margin:12px 0 0;color:var(--muted);line-height:1.85}
.cta-band{padding:30px;border-radius:30px;background:linear-gradient(135deg,#0d2f50,#0b7c87);color:#fff;box-shadow:var(--shadow);display:grid;grid-template-columns:1.2fr .8fr;gap:20px;align-items:center}
.cta-band h2{margin:0 0 10px;font-size:clamp(28px,3vw,36px)}
.cta-band p{margin:0;color:rgba(255,255,255,.88);line-height:1.85}
.cta-actions{display:flex;justify-content:flex-end;gap:12px;flex-wrap:wrap}
.cta-band .btn-secondary{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.22);color:#fff}
.list-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.case-cover{height:250px}
.case-card .card-body h3{font-size:24px}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.check-list{display:grid;gap:12px;margin-top:16px;padding-left:0}
.check-list li{position:relative;padding-left:28px;color:var(--muted);line-height:1.85;list-style:none}
.check-list li::before{content:"✓";position:absolute;left:0;top:0;color:var(--primary-2);font-weight:800}
.article-nav{display:flex;justify-content:space-between;gap:18px;margin-top:30px;padding-top:18px;border-top:1px solid var(--line)}
.article-nav a{flex:1;background:#f4f8fb;border:1px solid var(--line);padding:16px;border-radius:16px;color:#263a67;line-height:1.7}
.site-footer{margin-top:70px;background:#0b1d31;color:#eaf2fa}
.footer-grid{display:grid;grid-template-columns:1.25fr .8fr .8fr;gap:26px;padding:40px 0 24px}
.footer-brand{font-size:24px;font-weight:800;margin-bottom:10px}
.site-footer p{color:rgba(234,242,250,.76);line-height:1.9;margin:0}
.site-footer h3{margin:0 0 12px;font-size:18px}
.footer-links{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.footer-links a{color:rgba(234,242,250,.8)}
.footer-bottom{display:flex;justify-content:space-between;gap:14px;padding:16px 0 26px;border-top:1px solid rgba(255,255,255,.12);color:rgba(234,242,250,.68)}
.float-chat{position:fixed;right:18px;bottom:18px;z-index:110;display:inline-flex;align-items:center;justify-content:center;padding:14px 18px;border-radius:999px;background:linear-gradient(135deg,#f4b544,#ffd47c);color:#1d1a12;font-weight:800;box-shadow:0 18px 34px rgba(244,181,68,.32)}
.notice-strip{padding:14px 18px;border-radius:16px;background:#f6fbf8;border:1px solid rgba(11,124,135,.20);color:#20535a;line-height:1.85}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.muted{color:var(--muted)}
.center{text-align:center}
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.category-cover{height:210px}
.mini-list{display:grid;gap:10px;margin-top:16px}
.mini-list a{display:block;padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:#fff;line-height:1.7;color:#243b6d;transition:.25s ease}
.sticky-box{position:sticky;top:92px}
@media (max-width:1080px){
  .hero-grid,.banner-grid,.page-main,.contact-grid,.cta-band,.category-grid,.grid-3,.grid-4,.two-col,.list-grid,.footer-grid{grid-template-columns:1fr}
  .main-nav{display:none;position:absolute;top:76px;left:16px;right:16px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:var(--shadow);flex-direction:column;align-items:flex-start}
  .main-nav.open{display:flex}
  .nav-toggle{display:block}
  .hero-media{height:460px}
  .cta-actions{justify-content:flex-start}
}
@media (max-width:720px){
  .container{width:min(100% - 24px,1180px)}
  .hero-copy p{max-width:100%}
  .hero-points{grid-template-columns:1fr}
  .hero-media,.banner-media,.article-cover .banner-media{height:300px}
  .media-overlay span{font-size:28px;max-width:86%}
  .card-cover,.case-cover,.category-cover{height:210px}
  .article-main{padding:22px}
  .article-content p{font-size:16px}
}

.footer-grid-4{grid-template-columns:1.3fr .9fr .9fr .9fr}
.platform-card{background:linear-gradient(180deg,#ffffff,#f3f8fb)}
.hero-media,.banner-media,.card-cover,.case-cover,.category-cover{background:#dfe9f3}
.hero-media{height:auto;min-height:620px;aspect-ratio:5/6}
.banner-media{height:auto;min-height:360px;aspect-ratio:16/10}
.card-cover,.case-cover,.category-cover{height:auto;aspect-ratio:4/3}
.hero-media img,.banner-media img,.card-cover img,.case-cover img,.category-cover img{width:100%;height:100%;object-fit:cover;object-position:center center}
.notice-strip{font-size:15px}
.site-footer .footer-links a:hover{color:#fff}
@media (max-width:1080px){.footer-grid-4{grid-template-columns:1fr}}
@media (max-width:720px){.hero-media{min-height:300px}.banner-media{min-height:260px}}


/* Image ratio optimization for homepage core categories and content cards */
img{display:block;max-width:100%}
.category-grid{gap:24px;align-items:stretch}
.category-card{display:flex;flex-direction:column}
.category-card .card-body{flex:1;display:flex;flex-direction:column}
.category-card .mini-list{margin-top:auto;padding-top:16px}
.category-cover{display:block;aspect-ratio:16/10;min-height:230px;background:#dfe9f3}
.category-cover img{display:block;width:100%;height:100%;object-fit:cover;object-position:center 38%}
.card-cover,.case-cover{aspect-ratio:16/10;min-height:220px}
.card-cover img,.case-cover img{display:block;width:100%;height:100%;object-fit:cover;object-position:center 36%}
.card-cover-text{font-size:20px;line-height:1.35;padding:20px 22px}
.platform-site-note{margin:12px 0 0;color:var(--muted);line-height:1.85;font-size:15px}
.platform-site-note a{color:var(--primary-2);font-weight:700}
.site-footer a[target="_blank"]::after{content:"↗";font-size:12px;margin-left:4px;opacity:.75}
@media (max-width:720px){
  .category-cover,.card-cover,.case-cover{aspect-ratio:4/3;min-height:200px}
  .card-cover-text{font-size:18px;padding:18px}
}