/* ============================================================
   VAYTRON .cn site — global stylesheet (static mirror)
   ============================================================ */
:root {
  --primary: #0e5a96;
  --primary-dark: #093f6b;
  --accent: #2f9e8f;
  --text: #333;
  --text-light: #6b7480;
  --bg: #ffffff;
  --bg-soft: #f4f7fa;
  --border: #e3e8ee;
  --max-w: 1200px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}

img { max-width: 100%; display: block; }

a { color: var(--primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent); }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 20px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 8px rgba(0,0,0,.05);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 74px; gap: 16px;
}
.logo img { height: 46px; width: auto; }

.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav a {
  color: var(--text); font-weight: 600; font-size: 15px;
  padding: 8px 2px; border-bottom: 2px solid transparent;
}
.main-nav a:hover, .main-nav a.active { color: var(--primary); border-bottom-color: var(--primary); }

.btn {
  display: inline-block; padding: 11px 26px; border-radius: 4px;
  font-weight: 700; font-size: 14px; cursor: pointer; border: none;
  transition: all .2s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.header-quote { padding: 9px 20px; white-space: nowrap; }

.nav-toggle {
  display: none; background: none; border: none; cursor: pointer;
  font-size: 26px; color: var(--primary); line-height: 1;
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, #eef4f9 0%, #dceaf5 100%);
  padding: 64px 0;
}
.hero-inner { display: flex; align-items: center; gap: 48px; }
.hero-text { flex: 1 1 480px; }
.hero-text h1 { font-size: 42px; color: var(--primary-dark); line-height: 1.2; margin-bottom: 18px; }
.hero-text p.lead { font-size: 18px; color: var(--text-light); margin-bottom: 28px; }
.hero-img { flex: 1 1 480px; }
.hero-img img { width: 100%; border-radius: 8px; box-shadow: 0 12px 32px rgba(9,63,107,.18); }

/* ---------- Section base ---------- */
.section { padding: 64px 0; }
.section-soft { background: var(--bg-soft); }
.section-head { text-align: center; margin-bottom: 40px; }
.section-head h2 { font-size: 30px; color: var(--primary-dark); }
.section-head h2::after {
  content: ""; display: block; width: 64px; height: 3px;
  background: var(--accent); margin: 12px auto 0; border-radius: 2px;
}
.section-head p { color: var(--text-light); margin-top: 14px; max-width: 760px; margin-left: auto; margin-right: auto; }

/* ---------- Product cards ---------- */
.product-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px;
}
.product-card {
  background: #fff; border: 1px solid var(--border); border-radius: 8px;
  overflow: hidden; display: flex; flex-direction: column;
  transition: box-shadow .25s, transform .25s;
}
.product-card:hover { box-shadow: 0 10px 26px rgba(9,63,107,.14); transform: translateY(-4px); }
.product-card .thumb { aspect-ratio: 1/1; background: #fff; }
.product-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.product-card .info { padding: 16px; flex: 1; display: flex; flex-direction: column; }
.product-card h3 { font-size: 15px; color: var(--text); margin-bottom: 12px; line-height: 1.4; }
.product-card h3 a { color: inherit; }
.product-card h3 a:hover { color: var(--primary); }
.product-card .more { margin-top: auto; font-size: 13px; font-weight: 700; letter-spacing: .5px; text-transform: uppercase; }
.grid-actions { text-align: center; margin-top: 36px; }

/* ---------- Certificates ---------- */
.cert-grid { display: flex; flex-wrap: wrap; gap: 24px; justify-content: center; align-items: center; }
.cert-grid img {
  max-height: 220px; width: auto; border: 1px solid var(--border);
  border-radius: 6px; background: #fff; padding: 8px;
  transition: transform .25s, box-shadow .25s;
}
.cert-grid img:hover { transform: scale(1.03); box-shadow: 0 8px 22px rgba(0,0,0,.10); }

/* ---------- Advantages ---------- */
.adv-intro { text-align: center; color: var(--text-light); max-width: 800px; margin: -20px auto 40px; }
.adv-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.adv-card {
  background: #fff; border: 1px solid var(--border); border-radius: 8px;
  padding: 28px 16px; text-align: center;
}
.adv-card img { height: 52px; margin: 0 auto 14px; }
.adv-card .num { font-size: 30px; font-weight: 800; color: var(--primary); }
.adv-card h4 { font-size: 15px; margin: 4px 0 8px; color: var(--primary-dark); }
.adv-card p { font-size: 13px; color: var(--text-light); }

/* ---------- News ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
  background: #fff; border: 1px solid var(--border); border-radius: 8px;
  padding: 24px; display: flex; flex-direction: column;
  transition: box-shadow .25s, transform .25s;
}
.news-card:hover { box-shadow: 0 10px 26px rgba(9,63,107,.12); transform: translateY(-3px); }
.news-card .meta { font-size: 12px; color: var(--text-light); margin-bottom: 10px; }
.news-card .meta b { color: var(--primary); }
.news-card h3 { font-size: 17px; line-height: 1.45; margin-bottom: 10px; }
.news-card p { font-size: 14px; color: var(--text-light); flex: 1; }
.news-card .more { margin-top: 14px; font-weight: 700; font-size: 13px; }

/* ---------- Footer ---------- */
.site-footer { background: #10243a; color: #b8c6d6; font-size: 14px; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1.4fr; gap: 40px; padding: 56px 0 40px; }
.footer-top h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.footer-top a { color: #b8c6d6; }
.footer-top a:hover { color: #fff; }
.footer-links li { list-style: none; margin-bottom: 8px; }
.footer-contact li { list-style: none; margin-bottom: 10px; }
.social-row { display: flex; gap: 12px; margin-top: 16px; }
.social-row img { width: 26px; height: 26px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12);
  padding: 18px 0; text-align: center; font-size: 13px; color: #7e93a9;
}
.footer-bottom a { color: #7e93a9; }

/* ---------- Page banner (sub pages) ---------- */
.page-banner {
  background: linear-gradient(rgba(14,90,150,.78), rgba(9,63,107,.85)),
              url("https://ecdn6-nc.globalso.com/upload/p/4481/image_other/2025-09/contact.jpg") center/cover;
  color: #fff; text-align: center; padding: 58px 20px;
}
.page-banner h1 { font-size: 34px; }
.page-banner p { color: #d7e6f3; margin-top: 10px; max-width: 820px; margin-left: auto; margin-right: auto; }
.breadcrumb { padding: 14px 0; font-size: 13px; color: var(--text-light); }
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--primary); }

/* ---------- About page ---------- */
.profile-img { border-radius: 8px; box-shadow: 0 10px 26px rgba(9,63,107,.15); margin-bottom: 32px; }
.profile p { margin-bottom: 16px; color: #4a5560; }
.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 34px; }
.stat-box {
  background: var(--primary); color: #fff; border-radius: 8px;
  padding: 26px; text-align: center; position: relative; overflow: hidden;
}
.stat-box .idx { position: absolute; top: 10px; left: 14px; font-size: 13px; opacity: .55; }
.stat-box .big { font-size: 32px; font-weight: 800; }
.stat-box p { margin: 6px 0 0; font-size: 14px; color: #d7e9f8; }
.why-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.why-card {
  background: #fff; border: 1px solid var(--border); border-radius: 8px;
  padding: 28px; display: flex; gap: 18px; align-items: flex-start;
}
.why-card img { width: 54px; flex-shrink: 0; }
.why-card h3 { font-size: 17px; color: var(--primary-dark); margin-bottom: 8px; }
.why-card p { font-size: 14px; color: var(--text-light); }
.gallery-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.gallery-grid img {
  width: 100%; aspect-ratio: 4/3; object-fit: cover;
  border-radius: 6px; transition: transform .25s;
}
.gallery-grid img:hover { transform: scale(1.03); }

/* ---------- Quality page ---------- */
.qc-flags { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 20px; }
.qc-flags span {
  background: #fff; border: 1px solid var(--border); border-radius: 999px;
  padding: 8px 18px; font-size: 14px; font-weight: 600; color: var(--primary-dark);
}
.qc-img-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.qc-figure { position: relative; }
.qc-figure img { width: 100%; border-radius: 8px; aspect-ratio: 4/3; object-fit: cover; }
.qc-figure figcaption {
  position: absolute; left: 0; bottom: 0; right: 0;
  background: linear-gradient(transparent, rgba(16,36,58,.82));
  color: #fff; padding: 34px 16px 12px; border-radius: 0 0 8px 8px; font-size: 14px;
}
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.step {
  background: #fff; border: 1px solid var(--border); border-top: 4px solid var(--primary);
  border-radius: 8px; padding: 22px 16px;
}
.step .no { font-size: 24px; font-weight: 800; color: var(--accent); }
.step h3 { font-size: 15px; margin: 8px 0; color: var(--primary-dark); }
.step p { font-size: 13px; color: var(--text-light); }
.step .tag { display: inline-block; margin-top: 10px; font-size: 12px; background: var(--bg-soft); color: var(--primary); padding: 3px 10px; border-radius: 999px; font-weight: 700; }
.equip-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.equip-card { background: #fff; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.equip-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.equip-card .body { padding: 18px; }
.equip-card h3 { font-size: 16px; color: var(--primary-dark); margin-bottom: 8px; }
.equip-card p { font-size: 13px; color: var(--text-light); }
.doc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.doc-card { background: #fff; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.doc-card .imgwrap { padding: 14px; background: var(--bg-soft); }
.doc-card .imgwrap img { width: 100%; aspect-ratio: 3/4; object-fit: contain; border: 1px solid var(--border); background: #fff; }
.doc-card .body { padding: 18px; }
.doc-card h3 { font-size: 15px; color: var(--primary-dark); margin-bottom: 8px; }
.doc-card p { font-size: 13px; color: var(--text-light); margin-bottom: 10px; }
.doc-card ul { margin: 0 0 10px 18px; font-size: 13px; color: #4a5560; }
.doc-card .scope { font-size: 12px; color: var(--text-light); border-top: 1px dashed var(--border); padding-top: 10px; }
.checklist { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 26px; }
.checklist li {
  list-style: none; background: #fff; border: 1px solid var(--border);
  border-radius: 6px; padding: 14px 16px; font-size: 14px; font-weight: 600; color: var(--primary-dark);
}
.checklist li::before { content: "✓ "; color: var(--accent); font-weight: 800; }
.qc-note {
  background: #fff8ec; border: 1px solid #f0dcb5; border-radius: 8px;
  padding: 18px 22px; font-size: 14px; color: #7a6238; margin-top: 30px;
}

/* ---------- Contact page ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 40px; }
.contact-card { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 30px; }
.contact-card h2 { font-size: 20px; color: var(--primary-dark); margin-bottom: 8px; }
.contact-card .sub { color: var(--text-light); font-size: 14px; margin-bottom: 24px; }
.contact-item { display: flex; gap: 14px; margin-bottom: 18px; align-items: flex-start; }
.contact-item .ico {
  width: 38px; height: 38px; flex-shrink: 0; border-radius: 50%;
  background: var(--bg-soft); color: var(--primary); font-size: 17px;
  display: flex; align-items: center; justify-content: center;
}
.contact-item b { display: block; color: var(--primary-dark); font-size: 14px; }
.contact-item span, .contact-item a { font-size: 14px; color: var(--text-light); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { margin-bottom: 16px; }
.form-field label { display: block; font-size: 13px; font-weight: 700; color: var(--primary-dark); margin-bottom: 6px; }
.form-field input, .form-field textarea {
  width: 100%; padding: 11px 14px; border: 1px solid var(--border); border-radius: 5px;
  font: inherit; font-size: 14px; background: #fff;
}
.form-field input:focus, .form-field textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(14,90,150,.12); }
.form-field textarea { min-height: 130px; resize: vertical; }
.form-note { font-size: 12px; color: var(--text-light); margin-top: 10px; }

/* ---------- Product detail ---------- */
.pd-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.pd-gallery img { width: 100%; border: 1px solid var(--border); border-radius: 8px; background: #fff; }
.pd-info h1 { font-size: 26px; color: var(--primary-dark); margin-bottom: 14px; }
.pd-info table { width: 100%; border-collapse: collapse; font-size: 14px; }
.pd-info td { border: 1px solid var(--border); padding: 9px 12px; }
.pd-info td:first-child { background: var(--bg-soft); width: 34%; font-weight: 700; color: var(--primary-dark); }
.pd-desc { margin-top: 26px; }
.pd-desc p { margin-bottom: 12px; color: #4a5560; font-size: 14px; }

/* ---------- Newsletter strip ---------- */
.newsletter { background: var(--primary); color: #fff; padding: 40px 0; }
.newsletter-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.newsletter h3 { font-size: 22px; }
.newsletter p { color: #cfe2f2; font-size: 14px; }
.newsletter .btn { background: #fff; color: var(--primary); }
.newsletter .btn:hover { background: #eaf3fa; color: var(--primary-dark); }

/* ---------- Responsive ---------- */
@media (max-width: 992px) {
  .product-grid { grid-template-columns: repeat(3, 1fr); }
  .adv-grid { grid-template-columns: repeat(3, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
  .news-grid, .equip-grid, .doc-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-text h1 { font-size: 34px; }
}
@media (max-width: 760px) {
  .main-nav {
    display: none; position: absolute; top: 74px; left: 0; right: 0;
    background: #fff; flex-direction: column; gap: 0;
    border-bottom: 1px solid var(--border); box-shadow: 0 8px 18px rgba(0,0,0,.08);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 14px 20px; width: 100%; border-bottom: 1px solid var(--border); }
  .nav-toggle { display: block; }
  .hero-inner { flex-direction: column; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid, .why-grid, .stat-row, .equip-grid, .doc-grid, .news-grid, .checklist { grid-template-columns: 1fr; }
  .qc-img-pair, .pd-grid, .contact-grid, .form-row { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
}