:root {
  --bg: #f5f5f7;
  --panel: #ffffff;
  --ink: #1d1d1f;
  --muted: #62666d;
  --line: #dedfe3;
  --accent: #0a7a75;
  --accent-2: #255f9c;
  --dark: #18201f;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  margin: 0;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { display: block; height: auto; max-width: 100%; }
.site-header {
  align-items: center;
  background: rgba(255, 255, 255, .86);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 22px;
  min-height: 72px;
  padding: 12px clamp(20px, 5vw, 72px);
  position: sticky;
  top: 0;
  z-index: 20;
}
.brand { align-items: center; display: flex; gap: 10px; font-weight: 700; }
.logo-mark {
  align-items: center;
  background: #1d1d1f;
  border-radius: 8px;
  color: #fff;
  display: inline-flex;
  font-size: 13px;
  height: 34px;
  justify-content: center;
  letter-spacing: 0;
  width: 34px;
}
nav { display: flex; gap: 20px; justify-content: center; }
nav a { color: var(--muted); font-size: 14px; font-weight: 600; white-space: nowrap; }
nav a:hover, .text-link { color: var(--accent); }
.header-phone { color: var(--muted); display: grid; font-size: 12px; text-align: right; }
.header-phone strong { color: var(--ink); font-size: 14px; font-weight: 700; }
.hero {
  align-items: center;
  display: grid;
  gap: 36px;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
  min-height: calc(86vh - 72px);
  padding: clamp(36px, 5vw, 72px) clamp(20px, 5vw, 72px) clamp(30px, 5vw, 56px);
}
.hero-copy, .product-hero-copy { display: grid; gap: 18px; }
.kicker { color: var(--accent); font-size: 13px; font-weight: 800; letter-spacing: 0; margin: 0; }
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(42px, 6vw, 76px); letter-spacing: 0; line-height: 1.05; margin-bottom: 0; max-width: 100%; overflow-wrap: anywhere; word-break: break-word; }
h1 span { display: block; }
h2 { font-size: clamp(28px, 4vw, 46px); letter-spacing: 0; line-height: 1.15; margin-bottom: 12px; }
h3 { font-size: 21px; line-height: 1.25; margin-bottom: 8px; }
.lead { color: var(--muted); font-size: clamp(18px, 2vw, 24px); margin-bottom: 0; max-width: 760px; overflow-wrap: anywhere; word-break: break-word; }
.lead span { display: block; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button {
  border: 1px solid var(--line);
  border-radius: 8px;
  display: inline-flex;
  font-weight: 700;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
}
.button.primary { background: var(--ink); border-color: var(--ink); color: #fff; }
.button.secondary { background: #fff; color: var(--ink); }
.hero-visual, .product-hero-image, .about-visual {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  margin: 0;
  overflow: hidden;
}
.hero-visual img { aspect-ratio: 16 / 10; object-fit: cover; width: 100%; }
.section { padding: clamp(54px, 8vw, 100px) clamp(20px, 5vw, 72px); }
.section-heading { margin: 0 auto 28px; max-width: 920px; text-align: center; }
.section-intro, .section-heading p { color: var(--muted); }
.section-intro span { display: block; }
.entity-section { background: #fff; }
.about-profile {
  align-items: stretch;
  display: grid;
  gap: 24px;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  margin: 0 auto;
  max-width: 1120px;
}
.about-visual img { aspect-ratio: 16 / 10; object-fit: cover; width: 100%; }
.about-copy {
  align-content: center;
  background: #f5f5f7;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  padding: clamp(24px, 4vw, 42px);
}
.about-copy span, .product-copy span, .news-item span, .process-step span, .application-cards span, .contact-card span {
  color: var(--accent-2);
  display: block;
  font-size: 12px;
  font-weight: 800;
  margin-bottom: 8px;
}
.about-copy p, .product-copy p, .news-item p, .process-step p, .application-cards p { color: var(--muted); margin-bottom: 0; }
.about-proof, .feature-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.about-proof span, .feature-chips em {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  font-size: 13px;
  font-style: normal;
  padding: 7px 10px;
}
.visual-section { background: #f9f9fb; }
.product-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0 auto;
  max-width: 1120px;
}
.product-tile, .news-item, .process-step, .spec-card-grid article, .feature-list-detail div, .related-model-list article {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.product-image img { aspect-ratio: 16 / 10; object-fit: cover; width: 100%; }
.product-copy { padding: 22px; }
.product-detail-link { display: inline-flex; font-weight: 700; margin: 0 22px 22px; }
.dark-section { background: var(--dark); color: #fff; }
.dark-section .section-heading p, .application-cards p { color: rgba(255, 255, 255, .72); }
.application-cards, .service-process, .spec-card-grid, .feature-list-detail {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0 auto;
  max-width: 1120px;
}
.application-cards article {
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 8px;
  padding: 22px;
}
.process-step, .spec-card-grid article, .feature-list-detail div { padding: 22px; }
.news-list { display: grid; gap: 12px; margin: 0 auto; max-width: 920px; }
.news-item { display: grid; gap: 16px; grid-template-columns: 52px 1fr; padding: 22px; }
.news-item time { color: var(--muted); font-size: 13px; }
.contact-band {
  align-items: start;
  background: #18201f;
  color: #fff;
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  grid-template-columns: minmax(280px, .72fr) minmax(420px, 1.28fr);
}
.contact-band p { color: rgba(255, 255, 255, .72); }
.contact-intro {
  display: grid;
  gap: 16px;
  max-width: 560px;
}
.contact-highlight {
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 8px;
  display: grid;
  gap: 4px;
  margin-top: 8px;
  padding: 20px;
  width: min(100%, 360px);
}
.contact-highlight span,
.contact-row span { color: #aadbd1; font-size: 13px; font-weight: 700; }
.contact-highlight strong {
  color: #fff;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.1;
  overflow-wrap: anywhere;
}
.contact-panel {
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1fr);
}
.contact-group {
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 8px;
  padding: clamp(18px, 3vw, 26px);
}
.contact-group h3 {
  color: #fff;
  font-size: 20px;
  margin-bottom: 14px;
}
.contact-list {
  display: grid;
  gap: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.contact-list-address { grid-template-columns: 1fr; }
.contact-row {
  border-top: 1px solid rgba(255, 255, 255, .13);
  display: grid;
  gap: 4px;
  min-height: 74px;
  padding: 14px 16px 14px 0;
}
.contact-row:nth-child(1),
.contact-row:nth-child(2) { border-top: 0; }
.contact-list-address .contact-row:nth-child(2) { border-top: 1px solid rgba(255, 255, 255, .13); }
.contact-row strong {
  color: #fff;
  display: block;
  font-size: 17px;
  line-height: 1.34;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.site-footer {
  align-items: start;
  background: #fff;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr auto;
  padding: 30px clamp(20px, 5vw, 72px);
}
.site-footer p { color: var(--muted); margin-bottom: 0; max-width: 620px; }
.product-page, .article-page { background: #f5f5f7; }
.product-hero-detail {
  align-items: center;
  display: grid;
  gap: 36px;
  grid-template-columns: minmax(0, 1fr) minmax(320px, .9fr);
  padding: clamp(54px, 8vw, 104px) clamp(20px, 5vw, 72px);
}
.product-hero-copy h1 { font-size: clamp(38px, 5vw, 64px); }
.product-hero-image img { aspect-ratio: 16 / 10; object-fit: cover; width: 100%; }
.product-detail-section { margin: 0 auto; max-width: 1180px; padding: 34px clamp(20px, 5vw, 72px); }
.spec-card-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.feature-list-detail { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.feature-list-detail span {
  background: var(--accent);
  border-radius: 999px;
  display: block;
  height: 8px;
  margin-top: 8px;
  width: 8px;
}
.feature-list-detail div { display: grid; gap: 12px; grid-template-columns: auto 1fr; }
.related-model-list {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0 auto;
  max-width: 1120px;
}
.related-model-list article { padding: 18px; }
.related-model-list span {
  color: var(--accent-2);
  display: block;
  font-size: 12px;
  font-weight: 800;
  margin-bottom: 8px;
}
.related-model-list strong { display: block; font-size: 16px; line-height: 1.45; }
.parameter-table {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  margin: 0 auto;
  max-width: 920px;
  overflow: hidden;
}
.parameter-table div { display: grid; gap: 16px; grid-template-columns: 180px 1fr; padding: 16px 20px; }
.parameter-table div + div { border-top: 1px solid var(--line); }
.parameter-table span { color: var(--muted); }
.article-shell { margin: 0 auto; max-width: 860px; padding: clamp(46px, 7vw, 90px) 20px; }
.article-shell h1 { font-size: clamp(34px, 5vw, 58px); margin-bottom: 14px; }
.article-shell > p:not(.kicker):not(.lead) { color: #34363a; font-size: 18px; }
.breadcrumb { justify-content: flex-start; margin-bottom: 22px; }
.article-cta {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  margin: 34px auto 0;
  max-width: 920px;
  padding: 28px;
}
.article-cta p { color: var(--muted); }
@media (max-width: 900px) {
  .site-header { align-items: stretch; grid-template-columns: 1fr; }
  nav { justify-content: flex-start; overflow-x: auto; padding-bottom: 4px; }
  .header-phone { text-align: left; }
  .hero, .about-profile, .product-grid, .contact-band, .product-hero-detail, .site-footer { grid-template-columns: 1fr; }
  .application-cards, .service-process, .spec-card-grid, .feature-list-detail, .related-model-list, .contact-panel, .contact-list { grid-template-columns: 1fr; }
  .contact-row:nth-child(2) { border-top: 1px solid rgba(255, 255, 255, .13); }
  .hero { min-height: auto; padding-top: 42px; }
  h1 { font-size: 30px; line-height: 1.14; word-break: break-all; }
  .product-hero-copy h1 { font-size: 28px; line-height: 1.16; }
  .hero-copy, .product-hero-copy, .hero-visual, .product-hero-image, .about-copy, .section-heading { min-width: 0; max-width: 100%; width: 100%; }
  .hero-copy, .product-hero-copy { max-width: calc(100vw - 32px); }
  .lead, .section-intro, .about-copy p, .section-heading p, .product-copy p, .news-item p {
    max-width: 100%;
    overflow-wrap: anywhere;
    white-space: normal;
    word-break: break-all;
  }
  .hero, .section, .product-hero-detail, .product-detail-section, .article-shell, .site-footer { padding-left: 16px; padding-right: 16px; }
  .parameter-table div { grid-template-columns: 1fr; gap: 6px; }
}