/* ==========================================================================
   LAICHAU corporate site — industrial, clean, content-first
   ========================================================================== */
:root {
  --navy: #0B2B4A;
  --navy-2: #081F36;
  --blue: #0B5CAB;
  --blue-2: #084A8C;
  --cyan: #2E9BD6;
  --orange: #E4772E;
  --ink: #1E2B36;
  --muted: #5C6B78;
  --muted-2: #7C8A96;
  --line: #DCE4EB;
  --line-2: #E9EEF3;
  --bg: #F4F7FA;
  --bg-2: #EDF2F6;
  --white: #fff;
  --max: 1240px;
  --pad: 24px;
  --font: "Microsoft YaHei", "微软雅黑", "MSYH", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  --mono: "Microsoft YaHei", "微软雅黑", "MSYH", Consolas, monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
h1, h2, h3, h4, p, figure, ul, ol { margin: 0; padding: 0; }
ul, ol { list-style: none; }
::selection { background: var(--blue); color: #fff; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }
[hidden] { display: none !important; }

.container { width: 100%; max-width: calc(var(--max) + var(--pad) * 2); margin-inline: auto; padding-inline: var(--pad); }
.section { padding-block: 76px; }
.section--gray { background: var(--bg); }
.section--tight { padding-block: 44px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: 10px; left: 10px; z-index: 999; padding: 8px 14px; background: #fff; color: var(--navy); font-size: 13px; transform: translateY(-160%); transition: transform .2s; }
.skip-link:focus { transform: none; }

h1, h2, h3, h4 { color: var(--navy); font-weight: 700; line-height: 1.3; }
h2 { font-size: 36px; letter-spacing: -.025em; }
h3 { font-size: 20px; }
p { color: var(--muted); }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: currentColor; }
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 32px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.section-head h2 { margin-top: 0; }
.section-head p { max-width: 660px; margin-top: 10px; font-size: 15.5px; }
.section-link { flex: 0 0 auto; display: inline-flex; align-items: center; gap: 6px; color: var(--blue); font-size: 14.5px; font-weight: 700; }
.section-link::after { content: "→"; transition: transform .2s; }
.section-link:hover::after { transform: translateX(3px); }

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: background .2s, border-color .2s, color .2s;
}
.btn-primary { background: var(--blue); border-color: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-2); border-color: var(--blue-2); }
.btn-outline { border-color: var(--line); color: var(--navy); background: transparent; }
.btn-outline:hover { border-color: var(--blue); color: var(--blue); }
.btn-light { background: #fff; border-color: #fff; color: var(--navy); }
.btn-light:hover { background: var(--bg); }
.btn-ghost-light { border-color: rgba(255,255,255,.55); color: #fff; }
.btn-ghost-light:hover { background: rgba(255,255,255,.1); border-color: #fff; }
.btn-sm { min-height: 34px; padding: 0 14px; font-size: 12px; }
.note-box { padding: 14px 16px; background: var(--bg); border-left: 3px solid var(--blue); color: #415565; font-size: 13px; line-height: 1.7; }
.note-box a { color: var(--blue); font-weight: 700; }
.link-more { display: inline-flex; align-items: center; gap: 5px; color: var(--blue); font-size: 13px; font-weight: 700; }
.link-more::after { content: "→"; transition: transform .2s; }
.link-more:hover::after { transform: translateX(3px); }

/* top utility bar */
.topbar { height: 34px; background: var(--navy-2); color: #B9C8D5; font-size: 12px; }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; height: 34px; }
.topbar-left, .topbar-right { display: flex; align-items: center; gap: 18px; white-space: nowrap; }
.topbar a { color: #D6E1EA; }
.topbar a:hover { color: #fff; }
.topbar .sep { color: #496174; }
.lang-switch { display: inline-flex; align-items: center; gap: 2px; padding: 2px; border: 1px solid rgba(255,255,255,.28); border-radius: 999px; }
.lang-switch a, .lang-switch span { display: inline-flex; align-items: center; justify-content: center; min-width: 38px; height: 22px; padding: 0 9px; border-radius: 999px; color: #AFC1CF; font-size: 11px; line-height: 1; }
.lang-switch a:hover { color: #fff; }
.lang-switch .is-active { background: #fff; color: var(--navy); font-weight: 700; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--line);
  transition: box-shadow .25s;
}
.site-header.is-scrolled { box-shadow: 0 8px 24px rgba(11,43,74,.08); }
.header-inner { display: flex; align-items: center; min-height: 90px; gap: 26px; }
.logo { display: inline-flex; flex-direction: column; gap: 4px; flex: 0 0 auto; }
.logo img:first-child { width: 176px; height: auto; }
.logo img:last-child { width: 48px; height: auto; opacity: .82; }
.hotline { display: flex; flex-direction: column; padding-left: 24px; border-left: 1px solid var(--line); line-height: 1.25; }
.hotline span { color: var(--muted-2); font-size: 11px; }
.hotline strong { color: var(--blue); font-family: var(--mono); font-size: 21px; letter-spacing: -.02em; }
.main-nav { margin-left: auto; }
.nav-list { display: flex; align-items: center; gap: 28px; }
.nav-list > li { position: relative; }
.nav-list > li > a {
  display: inline-flex;
  align-items: center;
  height: 90px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
}
.nav-list > li > a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--blue);
  transform: scaleX(0);
  transition: transform .2s;
}
.nav-list > li:hover > a, .nav-list > li > a.active { color: var(--blue); }
.nav-list > li:hover > a::after, .nav-list > li > a.active::after { transform: scaleX(1); }
.nav-list .has-dropdown > a { gap: 6px; }
.nav-list .has-dropdown > a::before {
  content: "";
  order: 2;
  width: 5px;
  height: 5px;
  margin-left: 2px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
}
.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  padding: 8px 0;
  background: #fff;
  border-top: 2px solid var(--blue);
  box-shadow: 0 14px 32px rgba(11,43,74,.12);
  visibility: hidden;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .2s, transform .2s, visibility .2s;
}
.has-dropdown:hover > .dropdown, .has-dropdown:focus-within > .dropdown { visibility: visible; opacity: 1; transform: none; }
.dropdown a { display: block; padding: 10px 18px; color: #334554; font-size: 14px; }
.dropdown a:hover { background: var(--bg); color: var(--blue); }
.dropdown--mega { left: auto; right: 0; width: 560px; padding: 16px; }
.mega-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; }
.mega-grid a { display: flex; flex-direction: column; gap: 2px; padding: 10px 12px; border: 1px solid transparent; }
.mega-grid a strong { color: var(--navy); font-size: 14px; }
.mega-grid a span { color: var(--muted-2); font-size: 12.5px; line-height: 1.5; }
.mega-grid a:hover { background: var(--bg); border-color: var(--line); }
.header-quote { flex: 0 0 auto; margin-left: 4px; }
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  margin-left: auto;
  border: 1px solid var(--line);
  background: #fff;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span { display: block; width: 18px; height: 1px; background: var(--navy); transition: transform .2s, opacity .2s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* home hero */
.home-hero {
  position: relative;
  min-height: 600px;
  color: #fff;
  background: var(--navy);
  overflow: hidden;
}
.hero-photo { position: absolute; top: 0; right: 0; bottom: 0; z-index: 0; width: 48%; overflow: hidden; }
.hero-photo img { width: 100%; height: 100%; object-fit: cover; object-position: center 46%; }
.hero-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--navy) 0%, rgba(7,27,46,.78) 16%, rgba(7,27,46,.10) 55%, rgba(7,27,46,.20) 100%);
}
.home-hero::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  z-index: 0;
  width: 56%;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(90deg, #000 0%, transparent 100%);
  -webkit-mask-image: linear-gradient(90deg, #000 0%, transparent 100%);
  opacity: .7;
  pointer-events: none;
}
.home-hero-inner { position: relative; z-index: 2; display: flex; min-height: 600px; flex-direction: column; justify-content: center; padding-block: 72px 112px; }
.hero-copy { max-width: 660px; animation: fade-up .65s ease both; }
.hero-eyebrow { margin-bottom: 14px; color: #8FD0F2; font-family: var(--mono); font-size: 11px; letter-spacing: .16em; text-transform: uppercase; }
.home-hero h1 { max-width: 13em; color: #fff; font-size: 54px; line-height: 1.16; letter-spacing: -.04em; }
.hero-sub { max-width: 660px; margin-top: 22px; color: #C9D7E2; font-size: 17px; line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.hero-facts {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  border-top: 1px solid rgba(255,255,255,.18);
  background: rgba(6,24,42,.42);
  backdrop-filter: blur(5px);
}
.hero-facts .container { display: grid; grid-template-columns: repeat(4, 1fr); }
.fact { padding: 18px 24px; border-left: 1px solid rgba(255,255,255,.16); }
.fact:first-child { padding-left: 0; border-left: 0; }
.fact strong { display: block; color: #fff; font-family: var(--mono); font-size: 25px; font-weight: 500; letter-spacing: -.03em; line-height: 1.2; }
.fact span { display: block; margin-top: 4px; color: #94A9B8; font-size: 12.5px; }
@keyframes fade-up { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }

/* intro / split */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.split--reverse .split-media { order: 2; }
.split-media { position: relative; }
.split-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border: 1px solid var(--line); }
.split-media .media-note {
  position: absolute;
  left: 18px;
  bottom: 18px;
  padding: 8px 12px;
  background: rgba(11,43,74,.86);
  color: #fff;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.split-copy h2 { margin-bottom: 16px; }
.split-copy p { margin-top: 12px; font-size: 15.5px; }
.split-copy .btn { margin-top: 24px; }
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 26px; border-top: 1px solid var(--line); }
.stat { padding: 16px 18px 0 0; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat strong { display: block; color: var(--blue); font-family: var(--mono); font-size: 26px; font-weight: 500; letter-spacing: -.03em; line-height: 1.2; }
.stat span { display: block; margin-top: 3px; color: var(--muted-2); font-size: 12.5px; }

/* product cards */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.product-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.product-card:hover { border-color: var(--blue); transform: translateY(-3px); box-shadow: 0 14px 30px rgba(11,43,74,.08); }
.product-card-media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--bg-2); }
.product-card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.product-card:hover .product-card-media img { transform: scale(1.035); }
.product-card-media.is-contain { background: #fff; }
.product-card-media.is-contain img { object-fit: contain; padding: 16px; }
.cert-flag { position: absolute; left: 14px; bottom: 14px; padding: 5px 8px; background: #fff; border: 1px solid rgba(11,92,171,.28); color: var(--blue); font-size: 10px; font-weight: 700; line-height: 1.2; }
.product-tag { position: absolute; left: 14px; top: 14px; padding: 5px 8px; background: rgba(11,43,74,.86); color: #fff; font-family: var(--mono); font-size: 9.5px; letter-spacing: .1em; text-transform: uppercase; }
.product-card-body { display: flex; flex-direction: column; flex: 1; padding: 20px; }
.product-card-body h3 { margin-bottom: 8px; font-size: 20px; line-height: 1.4; }
.product-card-body p { font-size: 14.5px; line-height: 1.7; }
.product-spec { margin-top: 14px; padding-top: 11px; border-top: 1px solid var(--line-2); color: var(--ink); font-family: var(--mono); font-size: 11.5px; line-height: 1.6; }
.product-card-body .link-more { margin-top: auto; padding-top: 14px; }

/* catalog table */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
.data-table { width: 100%; border-collapse: collapse; min-width: 820px; font-size: 14px; }
.data-table th, .data-table td { padding: 15px 16px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line-2); }
.data-table thead th { background: var(--navy); color: #fff; font-size: 12px; font-weight: 600; letter-spacing: .05em; white-space: nowrap; }
.data-table tbody th { width: 20%; color: var(--navy); font-size: 14.5px; }
.data-table tbody td { color: var(--muted); }
.data-table tbody tr:last-child th, .data-table tbody tr:last-child td { border-bottom: 0; }
.data-table tbody tr:hover { background: #F7FAFC; }
.data-table a { color: var(--blue); font-weight: 700; }
.data-table a:hover { text-decoration: underline; }

/* applications */
.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.app-card { display: flex; gap: 14px; padding: 20px; background: #fff; border: 1px solid var(--line); transition: border-color .2s, box-shadow .2s; }
.app-card:hover { border-color: var(--blue); box-shadow: 0 10px 24px rgba(11,43,74,.06); }
.app-icon { display: flex; align-items: center; justify-content: center; width: 42px; height: 42px; flex: 0 0 auto; background: var(--bg); color: var(--blue); border: 1px solid var(--line); }
.app-icon svg { width: 21px; height: 21px; }
.app-card h3 { margin-bottom: 4px; font-size: 17px; }
.app-card p { font-size: 13.5px; line-height: 1.7; }

/* quality */
.quality-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: start; }
.check-list { border-top: 1px solid var(--line); }
.check-item { display: grid; grid-template-columns: 34px 1fr; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.check-num { color: var(--blue); font-family: var(--mono); font-size: 11px; line-height: 1.8; }
.check-item h3 { margin-bottom: 4px; font-size: 16px; }
.check-item p { font-size: 13.5px; line-height: 1.7; }
.cert-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 22px; }
.cert { padding: 16px; background: #fff; border: 1px solid var(--line); }
.cert strong { display: block; color: var(--navy); font-family: var(--mono); font-size: 16px; font-weight: 500; letter-spacing: -.02em; }
.cert span { display: block; margin-top: 3px; color: var(--muted-2); font-size: 11.5px; }
.quality-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border: 1px solid var(--line); }

/* news */
.news-list { border-top: 1px solid var(--line); }
.news-row { display: grid; grid-template-columns: 180px 1fr 90px; gap: 22px; align-items: center; padding: 18px 0; border-bottom: 1px solid var(--line); }
.news-thumb { display: block; aspect-ratio: 16 / 10; overflow: hidden; background: var(--bg-2); }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.news-row:hover .news-thumb img { transform: scale(1.03); }
.news-main { min-width: 0; }
.news-cat { color: var(--blue); font-family: var(--mono); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; }
.news-title { display: block; margin-top: 5px; color: var(--navy); font-size: 19px; font-weight: 700; line-height: 1.45; }
.news-row:hover .news-title { color: var(--blue); }
.news-summary { display: block; margin-top: 5px; color: var(--muted); font-size: 14px; line-height: 1.65; }
.news-date { color: var(--muted-2); font-family: var(--mono); font-size: 12px; text-align: right; }

/* CTA band */
.cta-band { position: relative; padding: 42px 0; background: var(--navy); color: #fff; overflow: hidden; }
.cta-band::after { content: ""; position: absolute; right: 0; top: 0; bottom: 0; width: 38%; background: url("../img/fan-stainless.jpg") center / cover no-repeat; opacity: .18; }
.cta-band .container { position: relative; z-index: 1; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.cta-band h2 { color: #fff; font-size: 25px; }
.cta-band p { max-width: 620px; margin-top: 6px; color: #B9C9D6; font-size: 13px; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 10px; flex: 0 0 auto; }

/* page hero / breadcrumb */
.page-hero {
  position: relative;
  min-height: 250px;
  display: flex;
  align-items: flex-end;
  padding: 36px 0;
  color: #fff;
  background: linear-gradient(115deg, #081F36 0%, #0B3557 55%, #0D4772 100%);
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: linear-gradient(90deg, #000 0%, rgba(0,0,0,.55) 55%, transparent 100%);
  -webkit-mask-image: linear-gradient(90deg, #000 0%, rgba(0,0,0,.55) 55%, transparent 100%);
  opacity: .65;
}
.page-hero::after {
  content: "";
  position: absolute;
  right: -6%;
  top: -55%;
  width: 46%;
  height: 210%;
  background: radial-gradient(circle, rgba(46,155,214,.20) 0%, transparent 65%);
  pointer-events: none;
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { margin-top: 10px; color: #fff; font-size: 34px; letter-spacing: -.03em; }
.page-hero-sub { max-width: 760px; margin-top: 8px; color: #C3D2DE; font-size: 13.5px; }
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; color: #AFC1CF; font-size: 11.5px; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span { color: #6E8494; }

/* page layout + sidebar */
.page-layout { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 40px; padding-block: 48px 72px; align-items: start; }
.sidebar { position: sticky; top: 104px; border: 1px solid var(--line); background: var(--bg); }
.side-title { padding: 15px 18px; background: var(--navy); color: #fff; font-size: 14px; font-weight: 700; }
.side-menu a { display: block; padding: 11px 18px; border-top: 1px solid var(--line); color: #3C4F5E; font-size: 13px; }
.side-menu a:hover { background: #fff; color: var(--blue); }
.side-menu a.active { background: #fff; color: var(--blue); font-weight: 700; border-left: 3px solid var(--blue); padding-left: 15px; }
.side-contact { padding: 16px 18px; border-top: 1px solid var(--line); background: #fff; }
.side-contact strong { display: block; color: var(--navy); font-family: var(--mono); font-size: 17px; font-weight: 500; }
.side-contact span { display: block; margin-top: 3px; color: var(--muted-2); font-size: 11px; }
.content { min-width: 0; }
.content > :first-child { margin-top: 0; }
.content h2 { margin-bottom: 14px; font-size: 30px; }
.content h3 { margin: 28px 0 8px; font-size: 19px; }
.content p { margin-top: 10px; font-size: 15.5px; }
.content ul { margin: 10px 0 0; }
.content ul li { position: relative; margin-top: 7px; padding-left: 14px; color: var(--muted); font-size: 15px; }
.content ul li::before { content: ""; position: absolute; left: 0; top: 10px; width: 5px; height: 5px; background: var(--blue); }
.content .lead { color: #344757; font-size: 15px; line-height: 1.8; }
.content .note-box { margin-top: 20px; padding: 14px 16px; background: var(--bg); border-left: 3px solid var(--blue); color: #415565; font-size: 13px; }

/* about */
.about-profile { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; }
.about-profile img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border: 1px solid var(--line); }
.about-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin-top: 20px; background: var(--line); border: 1px solid var(--line); }
.about-fact { padding: 15px; background: #fff; }
.about-fact strong { display: block; color: var(--blue); font-family: var(--mono); font-size: 18px; font-weight: 500; }
.about-fact span { display: block; margin-top: 2px; color: var(--muted-2); font-size: 11.5px; }
.founder-grid { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 40px; align-items: start; }
.founder-card { padding: 24px; background: #fff; border: 1px solid var(--line); }
.founder-card h2 { margin: 8px 0 2px; font-size: 34px; }
.founder-en { color: var(--muted-2); font-family: var(--mono); font-size: 13px; letter-spacing: .04em; }
.founder-role { display: inline-block; margin-top: 14px; padding: 4px 9px; background: var(--bg); color: var(--blue); font-size: 12px; font-weight: 700; }
.founder-sign { width: 190px; height: auto; margin: 22px 0 18px; }
.founder-meta { padding-top: 14px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12.5px; line-height: 1.8; }
.founder-copy h2 { font-size: 30px; }
.founder-copy p { font-size: 15.5px; }
.quote-box { margin-top: 24px; padding: 22px; background: var(--navy); color: #fff; font-size: 20px; line-height: 1.65; }
.quote-box span { display: block; margin-top: 8px; color: #AFC1CF; font-size: 12px; }
.founder-principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 14px; }
.principle { padding: 16px; background: #fff; border: 1px solid var(--line); }
.principle strong { display: block; color: var(--navy); font-size: 15px; }
.principle p { margin-top: 4px; font-size: 12.5px; }
.info-table { width: 100%; margin-top: 10px; border: 1px solid var(--line); border-collapse: collapse; font-size: 13px; }
.info-table th, .info-table td { padding: 10px 12px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line-2); }
.info-table th { width: 15%; background: var(--bg); color: var(--navy); font-weight: 600; white-space: nowrap; }
.info-table td { color: var(--muted); }
.info-table tr:last-child th, .info-table tr:last-child td { border-bottom: 0; }
.timeline { margin-top: 22px; border-left: 1px solid var(--line); padding-left: 20px; }
.timeline-item { position: relative; padding-bottom: 18px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before { content: ""; position: absolute; left: -25px; top: 6px; width: 9px; height: 9px; background: #fff; border: 1px solid var(--blue); border-radius: 50%; }
.timeline-year { color: var(--blue); font-family: var(--mono); font-size: 11px; letter-spacing: .06em; }
.timeline-item h3 { margin: 2px 0 2px; font-size: 14px; }
.timeline-item p { margin: 0; font-size: 12.5px; }
.section-block { margin-top: 40px; padding-top: 26px; border-top: 1px solid var(--line); }
.section-block:first-of-type { margin-top: 0; padding-top: 0; border-top: 0; }
.quality-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 16px; }
.quality-list .cert { min-height: 92px; }
.quality-list .cert strong { font-size: 14px; }

/* product detail */
.product-top { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: start; }
.product-gallery { position: relative; border: 1px solid var(--line); background: var(--bg); }
.product-gallery > img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.product-gallery.is-contain { background: #fff; }
.product-gallery.is-contain > img { object-fit: contain; padding: 22px; }
.certificate-block { display: grid; grid-template-columns: 180px 1fr; gap: 22px; align-items: center; margin-top: 18px; padding: 18px; background: var(--bg); border: 1px solid var(--line); }
.certificate-image { display: block; padding: 6px; background: #fff; border: 1px solid var(--line); }
.certificate-image img { width: 100%; height: auto; max-height: 300px; object-fit: contain; }
.certificate-copy h3 { margin: 4px 0 8px; font-size: 22px; }
.certificate-copy p { font-size: 14px; }
.certificate-note { margin-top: 8px; color: var(--muted-2) !important; font-size: 12.5px !important; }
.certificate-copy .btn { margin-top: 14px; }
.product-thumbs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 18px; border: 1px solid var(--line); background: var(--line); }
.product-thumbs img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; background: #fff; }
.product-thumbs img.is-doc { object-fit: contain; padding: 8px; }
.product-summary h1, .product-summary h2 { margin: 0 0 10px; color: var(--navy); font-size: 28px; line-height: 1.35; }
.product-summary .lead { margin-top: 0; }
.key-specs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 20px; background: var(--line); border: 1px solid var(--line); }
.key-spec { padding: 12px; background: #fff; }
.key-spec span { display: block; color: var(--muted-2); font-size: 10.5px; }
.key-spec strong { display: block; margin-top: 3px; color: var(--navy); font-family: var(--mono); font-size: 12px; font-weight: 500; letter-spacing: -.02em; }
.product-summary .btn { margin-top: 20px; }
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 16px; }
.feature { padding: 16px; background: #fff; border: 1px solid var(--line); }
.feature strong { display: block; color: var(--navy); font-size: 14px; }
.feature p { margin-top: 4px; font-size: 12.5px; line-height: 1.65; }
.spec-table { width: 100%; border-collapse: collapse; margin-top: 16px; border: 1px solid var(--line); font-size: 13px; }
.spec-table th, .spec-table td { padding: 11px 14px; border-bottom: 1px solid var(--line-2); text-align: left; vertical-align: top; }
.spec-table th { width: 25%; background: var(--bg); color: var(--navy); font-weight: 600; }
.spec-table td { color: var(--muted); }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: 0; }
.app-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.app-tags span { padding: 6px 10px; background: var(--bg); border: 1px solid var(--line); color: #405565; font-size: 12px; }
.related-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 18px; }
.related-card { display: grid; grid-template-columns: 110px 1fr; gap: 14px; align-items: center; padding: 12px; border: 1px solid var(--line); background: #fff; }
.related-card img { width: 110px; aspect-ratio: 1; object-fit: cover; }
.related-card strong { display: block; color: var(--navy); font-size: 13px; line-height: 1.4; }
.related-card span { display: block; margin-top: 3px; color: var(--blue); font-size: 12px; }

/* article */
.article { max-width: 850px; }
.article-head { padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.article-head h1 { margin: 8px 0 10px; font-size: 28px; line-height: 1.4; }
.article-meta { display: flex; flex-wrap: wrap; gap: 10px; color: var(--muted-2); font-family: var(--mono); font-size: 11px; }
.article-meta .news-cat { color: var(--blue); }
.article-body { padding-top: 22px; }
.article-body p { margin-top: 12px; font-size: 14.5px; line-height: 1.9; }
.article-body h2 { margin: 28px 0 8px; font-size: 21px; }
.article-body ul { margin-top: 10px; }
.article-body li { position: relative; margin-top: 7px; padding-left: 14px; color: var(--muted); font-size: 14px; }
.article-body li::before { content: ""; position: absolute; left: 0; top: 10px; width: 5px; height: 5px; background: var(--blue); }
.article-body .note-box { margin-top: 20px; padding: 14px 16px; background: var(--bg); border-left: 3px solid var(--blue); color: #415565; font-size: 13px; }
.article-related { margin-top: 30px; padding-top: 18px; border-top: 1px solid var(--line); }
.article-related h3 { margin-bottom: 10px; font-size: 15px; }
.article-related a { display: inline-flex; margin: 0 14px 6px 0; color: var(--blue); font-size: 13px; }

/* contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.contact-list { border-top: 1px solid var(--line); }
.contact-item { display: grid; grid-template-columns: 36px 1fr; gap: 12px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.contact-item svg { width: 18px; height: 18px; margin-top: 3px; color: var(--blue); }
.contact-item span { display: block; color: var(--muted-2); font-size: 11px; }
.contact-item strong, .contact-item a { display: block; margin-top: 2px; color: var(--navy); font-size: 14px; font-weight: 600; line-height: 1.6; }
.contact-item a:hover { color: var(--blue); }
.contact-box { padding: 24px; background: var(--bg); border: 1px solid var(--line); }
.contact-box h3 { margin-bottom: 10px; font-size: 16px; }
.contact-box ul li { position: relative; margin-top: 7px; padding-left: 16px; color: var(--muted); font-size: 13px; }
.contact-box ul li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--blue); font-size: 12px; }
.contact-box .note { margin-top: 14px; color: var(--muted-2); font-size: 11.5px; line-height: 1.7; }
.industry-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 18px; }
.industry { padding: 24px; background: #fff; border: 1px solid var(--line); }
.industry .app-icon { margin-bottom: 14px; }
.industry h2 { margin-bottom: 6px; font-size: 19px; }
.industry p { font-size: 13px; }
.industry-links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.industry-links a { padding: 5px 9px; background: var(--bg); border: 1px solid var(--line); color: var(--blue); font-size: 12px; }
.industry-links a:hover { border-color: var(--blue); }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 16px; background: var(--line); border: 1px solid var(--line); }
.step { padding: 20px; background: #fff; }
.step span { display: block; color: var(--blue); font-family: var(--mono); font-size: 11px; letter-spacing: .08em; }
.step strong { display: block; margin-top: 8px; color: var(--navy); font-size: 14px; }
.step p { margin-top: 4px; font-size: 12px; }

/* footer */
.site-footer { background: var(--navy-2); color: #A9BBC8; }
.footer-main { display: grid; grid-template-columns: 1.5fr .8fr 1fr 1.1fr; gap: 32px; padding: 46px 0 34px; }
.footer-logo { width: 170px; height: auto; margin-bottom: 14px; }
.footer-brand p { max-width: 300px; color: #8FA3B3; font-size: 12.5px; line-height: 1.8; }
.footer-col h3 { margin-bottom: 12px; color: #fff; font-size: 13px; }
.footer-col a, .footer-col p { display: block; margin-top: 7px; color: #9FB1BF; font-size: 12.5px; }
.footer-col a:hover { color: #fff; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; padding: 15px 0 20px; border-top: 1px solid rgba(255,255,255,.1); color: #6F8493; font-size: 11px; }
.footer-bottom a:hover { color: #fff; }

/* utility */
.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }
.text-blue { color: var(--blue) !important; }
.nowrap { white-space: nowrap; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1180px) {
  .header-inner { gap: 16px; }
  .nav-list { gap: 18px; }
  .hotline { display: none; }
  .header-quote { display: none; }
  .home-hero h1 { font-size: 41px; }
}
@media (max-width: 980px) {
  :root { --pad: 18px; }
  .topbar-left { display: none; }
  .topbar-inner { justify-content: flex-end; }
  .header-inner { min-height: 72px; }
  .logo img:first-child { width: 148px; }
  .logo img:last-child { width: 43px; }
  .nav-toggle { display: flex; }
  .main-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    max-height: calc(100vh - 106px);
    overflow-y: auto;
    padding: 6px 18px 20px;
    background: #fff;
    border-top: 1px solid var(--line);
    box-shadow: 0 18px 30px rgba(11,43,74,.12);
  }
  .nav-open .main-nav { display: block; }
  body.nav-open { overflow: hidden; }
  .nav-list { display: block; }
  .nav-list > li { border-bottom: 1px solid var(--line-2); }
  .nav-list > li > a { display: block; height: auto; padding: 13px 0; font-size: 14px; }
  .nav-list > li > a::after { display: none; }
  .nav-list .has-dropdown > a::before { float: right; margin-top: 6px; }
  .dropdown, .dropdown--mega {
    position: static;
    width: auto;
    padding: 0 0 10px 14px;
    border-top: 0;
    box-shadow: none;
    visibility: visible;
    opacity: 1;
    transform: none;
    display: block;
  }
  .mega-grid { grid-template-columns: 1fr; }
  .dropdown a { padding: 7px 0; font-size: 12.5px; }
  .mega-grid a { padding: 7px 0; }
  .mega-grid a span { display: none; }
  .home-hero, .home-hero-inner { min-height: 510px; }
  .hero-photo { width: 100%; opacity: .32; }
  .hero-photo::after { background: linear-gradient(90deg, rgba(6,24,42,.98) 0%, rgba(6,24,42,.84) 60%, rgba(6,24,42,.66) 100%); }
  .home-hero::before { width: 100%; opacity: .35; }
  .home-hero h1 { font-size: 36px; }
  .hero-copy { max-width: 580px; }
  .hero-facts .container { grid-template-columns: 1fr 1fr; }
  .fact:nth-child(3) { padding-left: 0; border-left: 0; border-top: 1px solid rgba(255,255,255,.16); }
  .fact:nth-child(4) { border-top: 1px solid rgba(255,255,255,.16); }
  .split, .quality-grid, .about-profile, .contact-grid, .product-top { grid-template-columns: 1fr; gap: 28px; }
  .founder-grid { grid-template-columns: 1fr; gap: 28px; }
  .founder-card { max-width: 380px; }
  .split--reverse .split-media { order: 0; }
  .product-grid, .app-grid { grid-template-columns: 1fr 1fr; }
  .industry-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr 1fr; }
  .page-layout { grid-template-columns: 1fr; gap: 26px; padding-block: 34px 56px; }
  .sidebar { position: static; }
  .side-menu { display: flex; flex-wrap: wrap; }
  .side-menu a { border-top: 0; border-right: 1px solid var(--line); }
  .side-menu a.active { border-left: 0; border-bottom: 2px solid var(--blue); padding-left: 18px; }
  .side-contact { display: none; }
  .cta-band .container { display: block; }
  .cta-actions { margin-top: 18px; }
  .footer-main { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-col:last-child { grid-column: 2 / -1; }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .section { padding-block: 50px; }
  .section-head { display: block; margin-bottom: 24px; }
  .section-link { margin-top: 10px; }
  h2 { font-size: 28px; }
  .home-hero, .home-hero-inner { min-height: 500px; }
  .hero-photo { opacity: .26; }
  .home-hero-inner { padding-block: 52px 132px; }
  .home-hero h1 { font-size: 34px; }
  .hero-sub { font-size: 15px; line-height: 1.8; }
  .hero-actions .btn { flex: 1 1 auto; }
  .fact { padding: 12px 14px; }
  .fact strong { font-size: 20px; }
  .fact span { font-size: 11.5px; }
  .page-hero { min-height: 210px; padding: 24px 0; }
  .page-hero h1 { font-size: 30px; }
  .product-grid, .app-grid { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .stat:nth-child(2n) { border-right: 0; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--line); padding-top: 12px; }
  .news-row { grid-template-columns: 120px 1fr; gap: 12px; }
  .news-date { grid-column: 2; text-align: left; }
  .news-thumb { aspect-ratio: 4 / 3; }
  .news-title { font-size: 16.5px; }
  .news-summary { display: none; }
  .quality-list, .cert-grid, .feature-grid, .related-grid, .about-facts, .key-specs { grid-template-columns: 1fr; }
  .key-specs { grid-template-columns: 1fr 1fr 1fr; }
  .process-grid { grid-template-columns: 1fr 1fr; }
  .founder-principles { grid-template-columns: 1fr; }
  .certificate-block { grid-template-columns: 1fr; }
  .certificate-image { max-width: 240px; }
  .related-card { grid-template-columns: 90px 1fr; }
  .related-card img { width: 90px; }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-col:last-child { grid-column: auto; }
  .footer-bottom { display: block; }
  .footer-bottom > * { display: block; margin-top: 5px; }
  .footer-bottom > *:first-child { margin-top: 0; }
  .side-menu a { font-size: 13.5px; padding: 9px 11px; }
}
@media (max-width: 480px) {
  .topbar-right { gap: 10px; }
  .home-hero h1 { font-size: 32px; }
  .hero-facts .container { grid-template-columns: 1fr 1fr; }
  .key-specs { grid-template-columns: 1fr; }
  .news-row { grid-template-columns: 96px 1fr; }
  .logo img:first-child { width: 132px; }
  .logo img:last-child { width: 38px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* Explicit global typeface: every visible text uses Microsoft YaHei. */
html, body, body *, body *::before, body *::after {
  font-family: "Microsoft YaHei", "微软雅黑", "Microsoft YaHei UI", "MSYH", "PingFang SC", Arial, sans-serif !important;
}