:root {
  --navy-950: #071f35;
  --navy-900: #0b2b49;
  --navy-800: #123f66;
  --teal-600: #0f8f92;
  --teal-500: #18a7a6;
  --teal-100: #dff5f3;
  --ice: #f3f8fa;
  --line: #dce7eb;
  --text: #183044;
  --muted: #617585;
  --white: #ffffff;
  --orange: #f2a640;
  --shadow: 0 18px 50px rgba(9, 42, 68, 0.12);
  --radius: 22px;
  --container: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--white);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 1000; padding: 10px 16px; background: var(--white); color: var(--navy-950); }
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  color: var(--white);
  background: rgba(7, 31, 53, 0.96);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand-mark { position: relative; width: 40px; height: 40px; transform: rotate(45deg); }
.brand-mark i { position: absolute; width: 15px; height: 15px; border-radius: 3px; }
.brand-mark i:nth-child(1) { left: 0; top: 12px; background: #2c87d1; }
.brand-mark i:nth-child(2) { left: 12px; top: 0; background: #3fa9e8; }
.brand-mark i:nth-child(3) { right: 0; top: 12px; background: var(--teal-500); }
.brand-mark i:nth-child(4) { left: 12px; bottom: 0; background: #4fc5bd; }
.brand-copy { display: grid; line-height: 1.15; }
.brand-copy strong { font-size: 20px; letter-spacing: .04em; }
.brand-copy span { margin-top: 4px; color: #9fc3d5; font-size: 10px; letter-spacing: .09em; text-transform: uppercase; }
.site-nav { display: flex; align-items: center; gap: 30px; }
.site-nav a { position: relative; padding: 26px 0 22px; color: #d8e7ee; font-size: 15px; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 16px; height: 2px; background: var(--teal-500); transition: right .25s ease; }
.site-nav a:hover, .site-nav a.active { color: var(--white); }
.site-nav a:hover::after, .site-nav a.active::after { right: 0; }
.nav-download { padding: 10px 16px !important; background: var(--teal-600); border-radius: 999px; color: var(--white) !important; }
.nav-download::after { display: none; }
.language-switch { display: inline-flex; align-items: center; gap: 7px; padding: 8px 12px !important; border: 1px solid rgba(255,255,255,.2); border-radius: 999px; color: var(--white) !important; background: rgba(255,255,255,.07); font-size: 13px !important; white-space: nowrap; }
.language-switch::before { content: "文/A"; font-weight: 800; letter-spacing: -.04em; }
.language-switch::after { display: none; }
.language-switch:hover { border-color: rgba(102,221,210,.65); background: rgba(24,167,166,.16); }
.nav-toggle { display: none; width: 44px; height: 44px; padding: 10px; border: 0; border-radius: 12px; color: var(--white); background: rgba(255,255,255,.08); cursor: pointer; }
.nav-toggle span { display: block; height: 2px; margin: 5px 0; background: currentColor; }

.hero {
  position: relative;
  overflow: hidden;
  min-height: 690px;
  color: var(--white);
  background: linear-gradient(115deg, var(--navy-950) 0%, var(--navy-900) 58%, #0f5b69 100%);
}
.hero::before, .page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .13;
  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: 64px 64px;
  mask-image: linear-gradient(90deg, #000, transparent 70%);
}
.hero-grid { position: relative; z-index: 2; display: grid; grid-template-columns: 1.03fr .97fr; align-items: center; gap: 66px; min-height: 690px; padding-block: 86px; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; color: var(--teal-500); font-size: 14px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 32px; height: 2px; background: currentColor; }
.hero h1 { max-width: 680px; margin: 22px 0 24px; font-size: clamp(42px, 5.2vw, 72px); line-height: 1.12; letter-spacing: -.035em; }
.hero h1 span { color: #66ddd2; }
.hero-lead { max-width: 650px; margin: 0 0 34px; color: #c3d9e4; font-size: 18px; }
.button-row { display: flex; flex-wrap: wrap; gap: 14px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 0 22px; border: 1px solid transparent; border-radius: 999px; font-weight: 700; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--teal-500); color: var(--white); box-shadow: 0 12px 28px rgba(24, 167, 166, .28); }
.button-light { border-color: rgba(255,255,255,.3); background: rgba(255,255,255,.07); color: var(--white); }
.button-outline { border-color: var(--navy-800); color: var(--navy-800); }
.hero-visual { position: relative; }
.hero-image { overflow: hidden; border-radius: 30px 8px 30px 8px; box-shadow: 0 28px 70px rgba(0,0,0,.32); transform: perspective(1200px) rotateY(-4deg); }
.hero-image img { width: 100%; aspect-ratio: 1.22; object-fit: cover; }
.hero-note { position: absolute; left: -38px; bottom: 28px; max-width: 260px; padding: 18px 20px; border-left: 4px solid var(--teal-500); border-radius: 8px; background: rgba(255,255,255,.96); color: var(--navy-900); box-shadow: var(--shadow); }
.hero-note strong { display: block; font-size: 20px; }
.hero-note span { color: var(--muted); font-size: 13px; }

.stats { position: relative; z-index: 3; margin-top: -46px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); overflow: hidden; border-radius: 18px; background: var(--white); box-shadow: var(--shadow); }
.stat { padding: 26px 30px; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat strong { display: block; color: var(--navy-900); font-size: 30px; line-height: 1.2; }
.stat span { color: var(--muted); font-size: 14px; }

.section { padding: 96px 0; }
.section-soft { background: var(--ice); }
.section-dark { color: var(--white); background: var(--navy-950); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 42px; }
.section-head h2 { margin: 12px 0 0; font-size: clamp(32px, 4vw, 48px); line-height: 1.2; }
.section-head p { max-width: 500px; margin: 0; color: var(--muted); }
.section-dark .section-head p { color: #a9c0cc; }
.text-link { color: var(--teal-600); font-weight: 700; white-space: nowrap; }

.category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.category-card { position: relative; min-height: 350px; overflow: hidden; border-radius: var(--radius); color: var(--white); background: var(--navy-900); box-shadow: var(--shadow); }
.category-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.category-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 20%, rgba(4, 25, 42, .92) 100%); }
.category-card:hover img { transform: scale(1.04); }
.category-content { position: absolute; z-index: 2; left: 26px; right: 26px; bottom: 24px; }
.category-number { color: #66ddd2; font-size: 13px; font-weight: 700; letter-spacing: .12em; }
.category-content h3 { margin: 6px 0 4px; font-size: 25px; }
.category-content p { margin: 0; color: #c9dae2; font-size: 14px; }

.advantages { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.advantage-panel { position: relative; overflow: hidden; min-height: 500px; border-radius: var(--radius); background: linear-gradient(145deg, var(--navy-900), #107c82); }
.advantage-panel::before { content: "DFD"; position: absolute; right: -20px; bottom: -70px; color: rgba(255,255,255,.07); font-size: 200px; font-weight: 900; letter-spacing: -.08em; }
.advantage-copy { position: relative; z-index: 2; padding: 64px 54px; color: var(--white); }
.advantage-copy h2 { margin: 12px 0 20px; font-size: 44px; line-height: 1.2; }
.advantage-copy p { color: #c5dce3; }
.feature-list { display: grid; gap: 18px; }
.feature-item { display: grid; grid-template-columns: 54px 1fr; gap: 18px; padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: var(--white); }
.feature-icon { display: grid; place-items: center; width: 54px; height: 54px; border-radius: 16px; color: var(--teal-600); background: var(--teal-100); font-size: 22px; font-weight: 800; }
.feature-item h3 { margin: 0 0 4px; font-size: 19px; }
.feature-item p { margin: 0; color: var(--muted); font-size: 14px; }

.industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.industry-card { min-height: 220px; padding: 28px; border: 1px solid rgba(255,255,255,.12); border-radius: 18px; background: rgba(255,255,255,.055); }
.industry-card span { color: #67d9d2; font-size: 30px; }
.industry-card h3 { margin: 22px 0 8px; font-size: 20px; }
.industry-card p { margin: 0; color: #a9c0cc; font-size: 14px; }

.brochure-band { padding: 72px 0; background: linear-gradient(110deg, #e5f5f3, #f7fafb); }
.brochure-wrap { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 50px; }
.brochure-wrap h2 { margin: 0 0 12px; font-size: 34px; }
.brochure-wrap p { max-width: 650px; margin: 0; color: var(--muted); }
.brochure-preview { display: flex; align-items: center; }
.brochure-preview img { width: 150px; border: 5px solid var(--white); border-radius: 10px; box-shadow: var(--shadow); }
.brochure-preview img + img { margin-left: -55px; transform: translateY(12px); }

.page-hero { position: relative; overflow: hidden; padding: 92px 0 80px; color: var(--white); background: linear-gradient(115deg, var(--navy-950), var(--navy-800)); }
.page-hero .container { position: relative; z-index: 2; }
.breadcrumbs { color: #9fc1d2; font-size: 14px; }
.page-hero h1 { max-width: 760px; margin: 18px 0 16px; font-size: clamp(40px, 5vw, 62px); line-height: 1.16; }
.page-hero p { max-width: 730px; margin: 0; color: #bfd3dd; font-size: 17px; }

.product-toolbar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 34px; }
.filter-button { padding: 10px 18px; border: 1px solid var(--line); border-radius: 999px; color: var(--navy-800); background: var(--white); cursor: pointer; }
.filter-button.active, .filter-button:hover { border-color: var(--teal-600); background: var(--teal-600); color: var(--white); }
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.product-card { overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: var(--white); transition: transform .2s ease, box-shadow .2s ease; }
.product-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.product-image { overflow: hidden; background: #f9fbfc; }
.product-image img { width: 100%; aspect-ratio: 4/3; object-fit: cover; transition: transform .4s ease; }
.product-card:hover img { transform: scale(1.04); }
.product-copy { padding: 19px 20px 22px; }
.product-tag { color: var(--teal-600); font-size: 12px; font-weight: 700; }
.product-copy h2, .product-copy h3 { margin: 6px 0 8px; color: var(--navy-900); font-size: 18px; line-height: 1.45; }
.product-copy p { margin: 0; color: var(--muted); font-size: 13px; }

.content-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 70px; align-items: start; }
.content-grid h2 { margin: 0 0 20px; font-size: 40px; line-height: 1.25; }
.content-grid p { color: var(--muted); }
.info-card { padding: 36px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--ice); }
.info-card h3 { margin-top: 0; }
.info-list { display: grid; gap: 14px; margin: 0; padding: 0; list-style: none; }
.info-list li { display: flex; justify-content: space-between; gap: 20px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.info-list li:last-child { padding-bottom: 0; border-bottom: 0; }
.info-list span { color: var(--muted); }
.value-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 48px; }
.value-card { padding: 30px; border-top: 3px solid var(--teal-500); border-radius: 0 0 16px 16px; background: var(--white); box-shadow: 0 12px 32px rgba(8,44,70,.08); }
.value-card h3 { margin: 0 0 8px; }
.value-card p { margin: 0; color: var(--muted); font-size: 14px; }

.solution-list { display: grid; gap: 24px; }
.solution-row { display: grid; grid-template-columns: 1fr 1.15fr; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
.solution-row:nth-child(even) .solution-image { order: 2; }
.solution-image img { width: 100%; height: 100%; min-height: 330px; object-fit: cover; }
.solution-copy { padding: 46px; }
.solution-copy h2 { margin: 10px 0 14px; font-size: 30px; }
.solution-copy p { color: var(--muted); }
.check-list { margin: 20px 0 0; padding: 0; list-style: none; }
.check-list li { position: relative; padding-left: 24px; margin: 7px 0; }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--teal-600); font-weight: 800; }

.contact-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 36px; }
.contact-card { padding: 38px; border-radius: var(--radius); background: var(--navy-900); color: var(--white); }
.contact-card h2 { margin-top: 0; font-size: 32px; }
.contact-card p { color: #bfd3dd; }
.contact-lines { margin: 30px 0 0; padding: 0; list-style: none; }
.contact-lines li { padding: 16px 0; border-top: 1px solid rgba(255,255,255,.13); }
.contact-lines small { display: block; color: #84a9bb; }
.contact-lines a { color: var(--white); }
.contact-lines a:hover { color: #66ddd2; }
.contact-note { padding: 38px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--ice); }
.contact-note h2 { margin-top: 0; }
.contact-note p { color: var(--muted); }

.site-footer { color: #afc5d0; background: #061b2d; }
.footer-main { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 54px; padding: 70px 0 50px; }
.footer-brand p { max-width: 360px; margin: 22px 0 0; color: #87a4b3; font-size: 14px; }
.footer-col h3 { margin: 0 0 18px; color: var(--white); font-size: 16px; }
.footer-col a { display: block; margin: 9px 0; color: #9db6c2; font-size: 14px; }
.footer-col a:hover { color: #66ddd2; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding: 22px 0; border-top: 1px solid rgba(255,255,255,.08); color: #6f8d9b; font-size: 13px; }
.footer-contact-strip { border-top: 1px solid rgba(255,255,255,.08); }
.footer-contact-inner { display: flex; flex-wrap: wrap; align-items: center; gap: 18px 34px; padding: 20px 0; }
.footer-contact-inner strong { color: var(--white); }
.footer-contact-inner a { color: #b8ced8; }
.footer-contact-inner a:hover { color: #66ddd2; }

.reveal { opacity: 0; transform: translateY(22px); transition: opacity .65s ease, transform .65s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 1000px) {
  .site-nav { position: fixed; inset: 76px 16px auto; display: none; padding: 18px; border: 1px solid rgba(255,255,255,.12); border-radius: 18px; background: var(--navy-950); box-shadow: var(--shadow); }
  .site-nav.open { display: grid; gap: 0; }
  .site-nav a { padding: 12px; }
  .site-nav a::after { display: none; }
  .language-switch { justify-content: center; margin: 6px 0; }
  .nav-toggle { display: block; }
  .hero-grid { grid-template-columns: 1fr; padding-block: 74px 110px; }
  .hero-visual { max-width: 720px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .category-grid, .product-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages, .content-grid { grid-template-columns: 1fr; }
  .industry-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-main { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-col:last-child { grid-column: 2 / 4; }
}

@media (max-width: 680px) {
  .container { width: min(calc(100% - 28px), var(--container)); }
  .brand-copy strong { font-size: 17px; }
  .brand-copy span { display: none; }
  .hero { min-height: auto; }
  .hero-grid { min-height: auto; gap: 44px; }
  .hero-note { left: 14px; bottom: -28px; }
  .stats { margin-top: 0; padding-top: 14px; background: var(--ice); }
  .stats-grid { grid-template-columns: 1fr 1fr; box-shadow: none; border: 1px solid var(--line); }
  .stat { padding: 20px; }
  .section { padding: 70px 0; }
  .section-head { display: block; }
  .section-head p { margin-top: 14px; }
  .category-grid, .product-grid, .industry-grid, .value-cards { grid-template-columns: 1fr; }
  .category-card { min-height: 310px; }
  .advantage-copy { padding: 44px 28px; }
  .advantage-copy h2 { font-size: 34px; }
  .feature-item { grid-template-columns: 44px 1fr; padding: 20px; }
  .feature-icon { width: 44px; height: 44px; }
  .brochure-wrap { grid-template-columns: 1fr; }
  .brochure-preview { justify-content: center; }
  .solution-row, .contact-layout { grid-template-columns: 1fr; }
  .solution-row:nth-child(even) .solution-image { order: 0; }
  .solution-copy { padding: 30px; }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 34px; }
  .footer-brand { grid-column: 1 / 3; }
  .footer-col:last-child { grid-column: auto; }
  .footer-bottom { display: block; }
}