:root {
  --brand: #1677ff;
  --brand-2: #0958d9;
  --brand-3: #003eb3;
  --accent: #1677ff;
  --ink: #0f2233;
  --text: #334155;
  --text-2: #62748a;
  --muted: #94a3b8;
  --bg: #f4f8fc;
  --surface: #ffffff;
  --surface-2: #eef4fb;
  --border: #e1ebf4;
  --radius: 20px;
  --radius-sm: 14px;
  --shadow-sm: 0 1px 3px rgba(15,37,64,.06), 0 1px 2px rgba(15,37,64,.05);
  --shadow: 0 14px 38px -16px rgba(15,37,64,.22);
  --shadow-lg: 0 30px 70px -24px rgba(15,37,64,.34);
  --max-width: 1200px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text); background: var(--bg); line-height: 1.72;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
::selection { background: rgba(22,119,255,.18); }

.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section--tight { padding: 72px 0; }
.section-head { text-align: center; max-width: 800px; margin: 0 auto 56px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(22,119,255,.08); color: var(--brand-3);
  padding: 7px 16px; border-radius: 999px; font-size: 13px; font-weight: 600;
  margin-bottom: 18px; border: 1px solid rgba(22,119,255,.2);
}
.eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); animation: pulse 1.8s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1);} 50% { opacity: .4; transform: scale(.6);} }
.section-title { font-size: clamp(28px, 4.5vw, 42px); font-weight: 800; letter-spacing: -0.02em; color: var(--ink); margin-bottom: 14px; line-height: 1.22; }
.section-subtitle { font-size: 16px; color: var(--text-2); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 15px 32px; border-radius: 999px; font-weight: 600; font-size: 16px;
  transition: all .22s cubic-bezier(.4,0,.2,1); border: none; cursor: pointer; white-space: nowrap; position: relative; overflow: hidden;
}
.btn-primary { background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #fff; box-shadow: 0 10px 26px -10px rgba(22,119,255,.5); }
.btn-primary:hover { background: linear-gradient(135deg, var(--brand-2), var(--brand-3)); transform: translateY(-2px); box-shadow: 0 16px 34px -10px rgba(9,88,217,.55); }
.btn-primary::after { content: ""; position: absolute; top: 0; left: -70%; width: 50%; height: 100%; background: linear-gradient(120deg, transparent, rgba(255,255,255,.45), transparent); transform: skewX(-20deg); transition: left .6s; }
.btn-primary:hover::after { left: 130%; }
.btn-ghost { background: #fff; color: var(--brand); border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.btn-ghost:hover { border-color: var(--brand); background: #f4f7fb; transform: translateY(-2px); }

/* Scroll progress */
.scroll-progress { position: fixed; top: 0; left: 0; height: 3px; width: 0; background: linear-gradient(90deg, var(--brand), #36a2ff); z-index: 200; transition: width .1s linear; }

/* Top bar */
.topbar { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.82); backdrop-filter: blur(16px) saturate(160%); -webkit-backdrop-filter: blur(16px) saturate(160%); border-bottom: 1px solid var(--border); }
.topbar .container { display: flex; align-items: center; justify-content: space-between; height: 35px; }
.topbar-logo { height: 28px; width: auto; }
.nav-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--border); border-radius: 10px; background: #fff; cursor: pointer; flex-direction: column; gap: 5px; align-items: center; justify-content: center; }
.nav-toggle span { width: 20px; height: 2px; background: var(--brand); border-radius: 2px; transition: .25s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Sub bar */
.subbar { position: sticky; top: 35px; z-index: 98; height: 60px; background: rgba(255,255,255,.7); backdrop-filter: blur(18px) saturate(170%); -webkit-backdrop-filter: blur(18px) saturate(170%); border-bottom: 1px solid rgba(225,235,244,.9); box-shadow: 0 6px 24px rgba(22,119,255,.06); }
.subbar .container { display: flex; align-items: center; justify-content: space-between; height: 100%; gap: 16px; }
.subbar-left { display: flex; align-items: center; gap: 10px; }
.subbar-logo { height: 26px; width: auto; }
.subbar-name { font-size: 15px; font-weight: 600; color: var(--ink); white-space: nowrap; }
.subbar-nav { display: flex; gap: 26px; font-size: 15px; font-weight: 500; color: var(--text-2); }
.subbar-nav a { position: relative; padding: 10px 0; transition: color .2s; white-space: nowrap; }
.subbar-nav a::after { content: ""; position: absolute; left: 0; bottom: 4px; width: 0; height: 2px; background: var(--brand); transition: width .25s; border-radius: 2px; }
.subbar-nav a:hover { color: var(--brand-3); }
.subbar-nav a:hover::after, .subbar-nav a.active::after { width: 100%; }
.subbar-nav a.active { color: var(--brand-3); font-weight: 700; }

.mobile-menu { display: none; position: fixed; top: 95px; left: 0; right: 0; z-index: 99; background: #fff; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); padding: 12px 24px 20px; flex-direction: column; gap: 4px; }
.mobile-menu.show { display: flex; }
.mobile-menu a { padding: 13px 8px; font-size: 15px; font-weight: 500; color: var(--text); border-bottom: 1px solid var(--surface-2); }
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a.active { color: var(--brand-3); font-weight: 700; }

/* Sub hero */
.sub-hero { position: relative; overflow: hidden; min-height: 420px; padding: 100px 0 80px; color: #fff; }
.sub-hero::before { content: ""; position: absolute; inset: 0; z-index: 0; background: linear-gradient(135deg, #0b3a8f 0%, #1677ff 58%, #3a9bff 100%); }
/* Image-based hero: hide gradient, use dark overlay for readability */
.sub-hero--img::before { display: none; }
.sub-hero--img .sub-hero__grid,
.sub-hero--img .sub-hero__orb { display: none; }
.sub-hero--dark { color: #0e1726; }
.sub-hero--dark h1 { color: #0e1726; text-shadow: none; }
.sub-hero--dark p { color: #0e1726 !important; text-shadow: none !important; }
.sub-hero--dark .sub-hero__badges span { background: rgba(14,23,38,.07); color: #0e1726; border-color: rgba(14,23,38,.16); }
.sub-hero--img.sub-hero--dark::after { display: none; }
.sub-hero--img::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 46%; z-index: 1; background: linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(0,0,0,.5) 100%); pointer-events: none; }
.sub-hero--brand::before { background: linear-gradient(135deg, #2e1a72 0%, #6d28d9 55%, #9b6bff 100%); }
.sub-hero--advantages::before { background: linear-gradient(135deg, #064e63 0%, #0ea5e9 55%, #34d3ee 100%); }
.sub-hero--news::before { background: linear-gradient(135deg, #15296b 0%, #2563eb 55%, #5a8cff 100%); }
.sub-hero__grid { position: absolute; inset: 0; z-index: 0; opacity: .35; background-image: linear-gradient(rgba(255,255,255,.18) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.18) 1px, transparent 1px); background-size: 60px 60px; -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 35%, #000 30%, transparent 78%); mask-image: radial-gradient(ellipse 80% 70% at 50% 35%, #000 30%, transparent 78%); }
.sub-hero__orb { position: absolute; border-radius: 50%; filter: blur(60px); opacity: .55; z-index: 0; animation: floaty 12s ease-in-out infinite; }
.sub-hero__orb.o1 { width: 320px; height: 320px; background: #7dd3fc; top: 6%; left: 4%; }
.sub-hero__orb.o2 { width: 260px; height: 260px; background: #bae6fd; bottom: 8%; right: 8%; animation-delay: -4s; }
@keyframes floaty { 0%,100% { transform: translate(0,0);} 50% { transform: translate(26px,-30px);} }
.sub-hero .container { position: relative; z-index: 2; }
.sub-hero .eyebrow { background: rgba(255,255,255,.14); color: #fff; border-color: rgba(255,255,255,.4); }
.sub-hero .eyebrow::before { background: #fff; }
.sub-hero h1 { font-size: 50px; line-height: 1.1; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 18px; text-shadow: none; }
.sub-hero p { font-size: 18px; color: rgba(255,255,255,.92); max-width: 640px; text-shadow: 0 1px 10px rgba(0,20,60,.3); }
.sub-hero__badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.sub-hero__badges span { font-size: 13px; color: #fff; background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.32); padding: 7px 14px; border-radius: 999px; backdrop-filter: blur(4px); }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .7s cubic-bezier(.22,1,.36,1), transform .7s cubic-bezier(.22,1,.36,1); }
.reveal.in { opacity: 1; transform: none; }

/* Generic content card */
.card-shine { position: relative; overflow: hidden; }
.card-shine::after { content: ""; position: absolute; top: 0; left: -70%; width: 50%; height: 100%; background: linear-gradient(120deg, transparent, rgba(255,255,255,.55), transparent); transform: skewX(-20deg); transition: left .65s; pointer-events: none; }
.card-shine:hover::after { left: 130%; }

.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 40px; box-shadow: var(--shadow-sm); }
.lead { font-size: 17px; color: var(--text); line-height: 1.85; }
.lead + .lead { margin-top: 18px; }

/* Split layout */
.split { display: grid; grid-template-columns: 1.5fr 1fr; gap: 48px; align-items: center; }
.split--rev { grid-template-columns: 1fr 1.5fr; }
.info-card { background: linear-gradient(160deg, #eef5ff, #ffffff); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow-sm); }
.info-card h4 { color: var(--ink); font-size: 18px; margin-bottom: 16px; }
.chip-row { display: flex; flex-direction: column; gap: 12px; }
.chip-row .chip { display: flex; align-items: center; gap: 12px; background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; transition: all .2s; }
.chip-row .chip:hover { border-color: var(--brand); transform: translateX(4px); box-shadow: var(--shadow-sm); }
.chip .dot { width: 38px; height: 38px; border-radius: 10px; background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #fff; display: grid; place-items: center; font-weight: 800; font-size: 15px; flex: 0 0 auto; }
.chip b { color: var(--ink); font-size: 15px; }
.chip small { display: block; color: var(--text-2); font-size: 13px; }

/* Feature grid (business platforms / services) */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
/* 六大企业赋能服务 - 向下平铺列表 */
.slist { display: flex; flex-direction: column; }
.sitem { display: grid; grid-template-columns: 220px 1fr; gap: 28px; padding: 28px 0; border-bottom: 1px solid var(--border); align-items: start; transition: background .25s; }
.sitem:last-child { border-bottom: none; }
.sitem .svc-img { width: 100%; height: auto; border-radius: 12px; object-fit: cover; box-shadow: var(--shadow-sm); }
.sitem h3 { color: var(--ink); font-size: 20px; margin-bottom: 10px; transition: color .25s; }
.sitem p { color: var(--text); font-size: 14.5px; line-height: 1.8; margin: 0; }
.sitem:hover h3 { color: var(--brand); }
@media (max-width: 560px) {
  .sitem { grid-template-columns: 1fr; gap: 16px; }
  .sitem .svc-img { width: 100%; max-height: 200px; object-fit: cover; }
}

/* Vertical text list (三大业务平台 etc.) */
.biz-list { display: flex; flex-direction: column; max-width: 920px; margin: 0 auto; }
.biz-item { display: grid; grid-template-columns: 340px 1fr; gap: 32px; padding: 30px 0; border-top: 1px solid var(--border); align-items: center; }
.biz-item:last-child { border-bottom: 1px solid var(--border); }
.biz-media { width: 100%; }
.biz-content { display: flex; flex-direction: column; }
.biz-item h3 { color: var(--ink); font-size: 21px; margin-bottom: 10px; line-height: 1.3; }
.biz-item p { color: var(--text); font-size: 15px; line-height: 1.88; margin: 0; }
.biz-img { width: 100%; height: auto; border-radius: 12px; transition: transform .35s, box-shadow .35s; }
.biz-media:hover .biz-img { transform: scale(1.03); box-shadow: var(--shadow-md); }
.company-building-img { width: 100%; border-radius: 16px; box-shadow: var(--shadow-lg); transition: transform .4s; }
.company-building-img:hover { transform: scale(1.03); }

/* Advantages vertical list (八大优势) */
.adv-list { display: flex; flex-direction: column; gap: 18px; max-width: 960px; margin: 0 auto; }
.adv-item { position: relative; display: grid; grid-template-columns: 200px 1fr; gap: 0; align-items: stretch; padding: 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-sm); overflow: hidden; transition: transform .3s cubic-bezier(.4,0,.2,1), box-shadow .3s, border-color .3s; }
.adv-item::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 5px; background: linear-gradient(180deg, var(--brand), var(--brand-2)); transform: scaleY(0); transform-origin: top; transition: transform .4s cubic-bezier(.4,0,.2,1); }
.adv-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--brand); }
.adv-item:hover::before { transform: scaleY(1); }
.adv-item .adv-img { width: 200px; height: 100%; min-height: 170px; object-fit: cover; display: block; flex: 0 0 auto; }
.adv-item > :last-child { padding: 24px 26px; }
.adv-item h3 { font-size: 19px; color: var(--ink); margin-bottom: 8px; }
.adv-item p { font-size: 14.5px; line-height: 1.85; color: var(--text); margin: 0; }

/* Brand page special */
.brand-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.bcard { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 0; box-shadow: var(--shadow-sm); transition: transform .25s, box-shadow .25s, border-color .25s; overflow: hidden; }
.bcard .bcard-img { width: 100%; height: auto; display: block; }
.bcard .bnum { padding: 24px 32px 0; font-size: 30px; font-weight: 900; color: #1677ff; line-height: 1; margin-bottom: 10px; }
.bcard h3 { padding: 0 32px; color: var(--ink); font-size: 19px; margin-bottom: 12px; }
.bcard p { padding: 0 32px 32px; color: var(--text); font-size: 14.5px; line-height: 1.8; margin: 0; }
.bcard:hover { transform: translateY(-8px); box-shadow: 0 18px 40px -12px rgba(37,99,235,.35); border-color: #2563eb; }

/* Timeline (company history) */
.timeline { position: relative; max-width: 860px; margin: 0 auto; padding-left: 36px; }
.timeline::before { content: ""; position: absolute; left: 18px; top: 6px; bottom: 6px; width: 3px; background: linear-gradient(var(--brand), #9ec5ff); border-radius: 3px; transform: scaleY(0); transform-origin: top; transition: transform 1.1s ease; }
.timeline.in::before { transform: scaleY(1); }
.tl { position: relative; padding: 0 0 34px 28px; }
.tl:last-child { padding-bottom: 0; }
.tl::before { content: ""; position: absolute; left: -29px; top: 4px; width: 18px; height: 18px; border-radius: 50%; background: #fff; border: 4px solid var(--brand); box-shadow: 0 0 0 4px rgba(22,119,255,.15); }
.tl .date { display: inline-block; font-weight: 800; color: var(--brand-3); font-size: 15px; margin-bottom: 6px; letter-spacing: .5px; }
.tl p { color: var(--text); font-size: 15px; line-height: 1.8; margin: 0; }

/* News list */
.news-list { display: flex; flex-direction: column; gap: 22px; max-width: 920px; margin: 0 auto; }
.news-item { display: grid; grid-template-columns: 240px 1fr; gap: 26px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); transition: transform .25s, box-shadow .25s, border-color .25s; }
.news-item:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--brand); }
.news-thumb { height: 100%; min-height: 180px; overflow: hidden; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.news-item:hover .news-thumb img { transform: scale(1.07); }
.news-body { padding: 24px 28px 24px 0; display: flex; flex-direction: column; justify-content: center; }
.news-body h3 { color: var(--ink); font-size: 19px; line-height: 1.45; margin-bottom: 10px; }
.news-body p { color: var(--text-2); font-size: 14.5px; line-height: 1.75; margin: 0 0 14px; }
.news-meta { display: flex; align-items: center; gap: 14px; font-size: 13px; color: var(--muted); }
.news-meta .src { color: var(--brand-3); font-weight: 600; }

/* CTA banner */
.cta { background: linear-gradient(135deg, #0b3a8f, #1677ff); border-radius: 26px; padding: 56px 48px; text-align: center; color: #fff; position: relative; overflow: hidden; }
.cta h2 { font-size: clamp(26px, 4vw, 38px); margin-bottom: 14px; }
.cta p { color: rgba(255,255,255,.9); margin-bottom: 26px; font-size: 16px; }

/* Footer */
footer { background: #eef4fb; color: var(--text-2); padding: 64px 0 30px; font-size: 14px; border-top: 1px solid var(--border); }
footer .f-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px; padding-bottom: 36px; border-bottom: 1px solid var(--border); }
footer .f-brand b { color: var(--ink); font-size: 18px; font-weight: 800; display: block; margin-bottom: 12px; }
footer .f-brand p { color: var(--text-2); max-width: 320px; }
footer .f-col h5 { color: var(--ink); font-size: 14px; font-weight: 700; margin-bottom: 16px; }
footer .f-col a { display: block; color: var(--text-2); padding: 6px 0; transition: color .2s; }
footer .f-col a:hover { color: var(--brand-3); }
footer .f-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; padding-top: 24px; color: var(--muted); font-size: 13px; }

.to-top { position: fixed; right: 24px; bottom: 24px; width: 46px; height: 46px; border-radius: 50%; background: var(--brand); color: #fff; border: none; font-size: 20px; cursor: pointer; box-shadow: var(--shadow); opacity: 0; pointer-events: none; transition: opacity .3s, transform .3s; z-index: 90; }
.to-top.show { opacity: 1; pointer-events: auto; }
.to-top:hover { transform: translateY(-3px); }

@media (max-width: 980px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .split, .split--rev { grid-template-columns: 1fr; gap: 28px; }
  .brand-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .subbar-nav { display: none; }
  .nav-toggle { display: flex; }
  .mobile-menu { top: 95px; }
  .section { padding: 72px 0; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .biz-item { grid-template-columns: 1fr; gap: 16px; padding: 24px 0; }
  .biz-media { max-width: 420px; }
  .adv-item { grid-template-columns: 1fr; }
  .adv-item .adv-img { width: 100%; height: 200px; }
  .adv-item > :last-child { padding: 18px; }
  .adv-item .aicon svg { width: 24px; height: 24px; }
  .news-item { grid-template-columns: 1fr; }
  .news-thumb { min-height: 200px; }
  .news-body { padding: 22px 24px 26px; }
  .biz-img { max-width: 100%; }
  .company-building-img { margin-top: 28px; }
  .company-split { grid-template-columns: 1fr; gap: 28px; }
  footer .f-top { grid-template-columns: 1fr; gap: 28px; }
  .panel { padding: 26px; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}
/* Page variants and reusable utilities */
.sub-hero--advantages { background: url("../images/advantages/hero.jpg") center / cover no-repeat; }
.sub-hero--brand { background: url("../images/brand/hero.jpg") center / cover no-repeat; }
.sub-hero--business { background: url("../images/business/hero.jpg") center / cover no-repeat; }
.sub-hero--company { background: url("../images/company/hero.jpg") center / cover no-repeat; }
.sub-hero--news { background: url("../images/news/hero.jpg") center / cover no-repeat; }
.section-bg-muted { background: var(--surface-2); }
.section-bg-white { background: #fff; }
.split--single { grid-template-columns: 1fr; max-width: 880px; margin: 0 auto; }
.split--company { grid-template-columns: 1fr 1.5fr; }
.lead--spaced { margin-top: 16px; }
.btn-light--inverse { background: #fff; color: var(--brand); }
.delay-0 { transition-delay: 0ms; }
.delay-60 { transition-delay: 60ms; }
.delay-70 { transition-delay: 70ms; }
.delay-80 { transition-delay: 80ms; }
.delay-90 { transition-delay: 90ms; }
.delay-120 { transition-delay: 120ms; }
.delay-140 { transition-delay: 140ms; }
.delay-180 { transition-delay: 180ms; }
.delay-240 { transition-delay: 240ms; }
.delay-300 { transition-delay: 300ms; }
.delay-360 { transition-delay: 360ms; }
.delay-420 { transition-delay: 420ms; }