:root {
  --ink: #122033;
  --muted: #5c6875;
  --line: #dce5ed;
  --blue: #0b5cab;
  --cyan: #0f9fc6;
  --green: #2d7d59;
  --amber: #f4a51c;
  --bg: #f5f8fb;
  --dark: #071725;
  --panel: #fff;
  --max: 1180px;
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--bg); line-height: 1.72; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.wrap { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.topbar { background: var(--dark); color: rgba(255,255,255,.78); font-size: 13px; }
.topbar .wrap, footer .wrap { min-height: 38px; display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.nav { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.97); border-bottom: 1px solid rgba(18,32,51,.08); backdrop-filter: blur(12px); }
.nav-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; min-width: 280px; }
.brand-mark { width: 42px; height: 42px; border-radius: 8px; display: grid; place-items: center; color: #fff; background: linear-gradient(135deg, var(--blue), var(--cyan)); font-weight: 900; }
.brand small { display: block; color: var(--muted); font-size: 12px; font-weight: 500; line-height: 1.25; }
.nav-links { display: flex; align-items: center; gap: 24px; color: #314357; font-size: 15px; white-space: nowrap; }
.nav-links a:hover { color: var(--blue); }
.nav-cta, .btn { border-radius: 6px; font-weight: 800; }
.nav-cta { padding: 10px 16px; color: #fff; background: var(--blue); }
.hero { position: relative; min-height: 640px; color: #fff; overflow: hidden; background: var(--dark); }
.hero-bg { position: absolute; inset: 0; background: linear-gradient(105deg, rgba(7,23,37,.96) 0%, rgba(7,23,37,.84) 42%, rgba(7,23,37,.28) 100%), url("articles/controlled-atmosphere/image2.png") center right / cover no-repeat; }
.hero::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 90px; background: linear-gradient(0deg, var(--bg), rgba(245,248,251,0)); }
.hero-inner { position: relative; z-index: 1; min-height: 640px; display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 48px; align-items: center; padding: 74px 0 108px; }
.hero-copy h1 { max-width: 780px; margin: 12px 0 22px; font-size: clamp(42px, 5.4vw, 72px); line-height: 1.08; letter-spacing: 0; }
.hero-copy p { max-width: 710px; margin: 0 0 32px; color: rgba(255,255,255,.82); font-size: 19px; }
.kicker { color: var(--blue); font-size: 13px; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 8px; }
.kicker.light { color: #7cdbff; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.btn { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: 0 22px; border: 1px solid transparent; }
.btn.primary { background: var(--amber); color: #17202a; }
.btn.ghost { border-color: rgba(255,255,255,.38); color: #fff; }
.hero-panel { display: grid; border: 1px solid rgba(255,255,255,.2); background: rgba(8,28,45,.72); backdrop-filter: blur(12px); }
.hero-panel div { padding: 20px; border-bottom: 1px solid rgba(255,255,255,.16); }
.hero-panel div:last-child { border-bottom: 0; }
.hero-panel b { display: block; font-size: 21px; }
.hero-panel span { color: rgba(255,255,255,.7); font-size: 14px; }
section { display: flow-root; padding: 88px 0; }
.soft { background: #fff; }
.dark { background: var(--dark); color: #fff; }
.dark .section-head p { color: rgba(255,255,255,.68); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 34px; }
h1, h2, h3, p { margin-top: 0; }
h2 { margin-bottom: 0; font-size: clamp(30px, 4vw, 44px); line-height: 1.2; letter-spacing: 0; }
.section-head p { max-width: 560px; margin: 0; color: var(--muted); }
.business-grid, .product-layout { display: grid; grid-template-columns: 1.05fr .95fr; gap: 24px; align-items: stretch; }
.feature-panel { position: relative; min-height: 460px; overflow: hidden; border-radius: 8px; color: #fff; background: #111; }
.feature-panel img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; }
.feature-panel::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(4,17,30,.9), rgba(4,17,30,.14)); }
.feature-panel div { position: absolute; z-index: 1; left: 30px; right: 30px; bottom: 28px; }
.feature-panel h3 { margin-bottom: 8px; font-size: 28px; }
.feature-panel p { margin: 0; color: rgba(255,255,255,.78); }
.service-list, .product-list { display: grid; gap: 14px; }
.service-list article, .product-list article { padding: 23px; border-radius: 8px; background: var(--panel); border: 1px solid var(--line); }
.product-list { grid-template-rows: repeat(3, minmax(0, 1fr)); }
.product-list article { display: flex; flex-direction: column; justify-content: center; min-height: 128px; }
.service-list b, .product-list h3 { display: block; margin: 0 0 6px; font-size: 19px; }
.service-list p, .product-list p { margin: 0; color: var(--muted); font-size: 14px; }
.product-layout { align-items: start; }
.image-link { position: relative; display: block; overflow: hidden; align-self: start; min-height: 0; border-radius: 8px; border: 1px solid var(--line); background: #fff; box-shadow: 0 18px 54px rgba(18,32,51,.12); }
.image-link img { width: 100%; aspect-ratio: 16 / 11; height: auto; object-fit: contain; background: #fff; }
.image-link span { position: absolute; left: 18px; bottom: 18px; padding: 9px 12px; border-radius: 6px; color: #fff; background: rgba(7,23,37,.78); font-weight: 800; }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.case-card { overflow: hidden; border-radius: 8px; background: var(--panel); border: 1px solid var(--line); box-shadow: 0 16px 42px rgba(18,32,51,.08); }
.case-card:hover { transform: translateY(-3px); transition: transform .18s ease; }
.case-card img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; background: #e9eef3; }
.case-card div { padding: 22px; }
.case-card h3 { margin-bottom: 8px; font-size: 21px; }
.case-card p { margin-bottom: 14px; color: var(--muted); font-size: 14px; }
.case-card span { color: var(--blue); font-weight: 900; }
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.16); }
.steps article { min-height: 190px; padding: 24px; background: #0b2034; }
.steps span { display: grid; place-items: center; width: 38px; height: 38px; margin-bottom: 22px; border-radius: 50%; background: var(--amber); color: #17202a; font-weight: 900; }
.steps b { display: block; margin-bottom: 8px; font-size: 18px; }
.steps p { margin: 0; color: rgba(255,255,255,.68); font-size: 14px; }
.article-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.article-list a { padding: 22px; border-radius: 8px; border: 1px solid var(--line); background: #fff; }
.article-list b { display: block; margin-bottom: 4px; font-size: 18px; }
.article-list span { color: var(--muted); font-size: 14px; }
#contact { padding: 104px 0 96px; overflow: hidden; background: var(--bg); }
.contact-box { position: relative; display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr); gap: 0; overflow: hidden; clear: both; border-radius: 8px; background: var(--blue); color: #fff; }
.contact-box > div { padding: 48px; background: linear-gradient(135deg, #0b5cab, #2d7d59); }
.contact-box h2 { margin-bottom: 14px; }
.contact-box p { max-width: 620px; color: rgba(255,255,255,.78); }
.contact-box ul { margin: 20px 0 0; padding-left: 18px; font-weight: 700; }
.contact-box img { width: 100%; height: 100%; min-height: 360px; object-fit: contain; background: #fff; }
footer { padding: 26px 0; background: var(--dark); color: rgba(255,255,255,.72); font-size: 14px; }
.article-page { background: #fff; }
.article-hero { padding: 74px 0 38px; background: #eef5f9; border-bottom: 1px solid var(--line); }
.article-hero h1 { max-width: 900px; margin: 8px 0 14px; font-size: clamp(34px, 5vw, 58px); line-height: 1.15; letter-spacing: 0; }
.article-hero p { max-width: 760px; color: var(--muted); font-size: 18px; }
.article-shell { display: grid; grid-template-columns: minmax(0, 760px) 300px; gap: 56px; align-items: start; padding: 54px 0 88px; }
.article-content h2 { margin: 34px 0 12px; font-size: 28px; }
.article-content h3 { margin: 26px 0 8px; font-size: 21px; }
.article-content p { color: #334255; }
.article-content figure { margin: 28px 0; }
.article-content figure img { width: 100%; border-radius: 8px; border: 1px solid var(--line); }
.article-content figcaption { margin-top: 8px; color: var(--muted); font-size: 13px; }
.info-table { width: 100%; border-collapse: collapse; margin: 18px 0 28px; font-size: 15px; }
.info-table th, .info-table td { padding: 12px 14px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.info-table th { width: 150px; background: #f3f7fb; }
.side-card { position: sticky; top: 98px; padding: 22px; border-radius: 8px; border: 1px solid var(--line); background: #f8fafc; }
.side-card a { display: block; padding: 10px 0; color: var(--blue); font-weight: 800; border-bottom: 1px solid var(--line); }
.side-card a:last-child { border-bottom: 0; }
@media (max-width: 980px) {
  .topbar .wrap, .nav-inner { align-items: flex-start; flex-direction: column; padding: 10px 0; }
  .nav-links { width: 100%; overflow-x: auto; gap: 18px; padding-bottom: 4px; }
  .hero, .hero-inner { min-height: auto; }
  .hero-inner, .business-grid, .product-layout, .contact-box, .article-shell { grid-template-columns: 1fr; }
  .hero-inner { padding: 70px 0 96px; }
  .hero-panel { grid-template-columns: repeat(2, 1fr); }
  .product-list { grid-template-rows: none; }
  .product-list article { min-height: 0; }
  .image-link { min-height: 0; }
  .image-link img { height: auto; object-fit: contain; }
  .case-grid, .article-list { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .side-card { position: static; }
}
@media (max-width: 560px) {
  .wrap { width: min(var(--max), calc(100% - 28px)); }
  .brand { min-width: 0; }
  .brand span:last-child { max-width: 260px; }
  .hero-copy h1 { font-size: 38px; }
  section { padding: 62px 0; }
  .section-head { display: block; }
  .section-head p { margin-top: 12px; }
  .hero-panel { grid-template-columns: 1fr; }
  .contact-box > div { padding: 34px 24px; }
}