:root {
  --bg: #f4f2ee;
  --surface: #ffffff;
  --ink: #1b1e23;
  --muted: #5e6570;
  --line: #d8d4cc;
  --steel: #2d323c;
  --header: #16181c;
  --cta: #b5471d;
  --cta-hover: #933914;
  --placeholder: #e6e2db;
  --max: 1180px;
  --nav-h: 72px;
}

* { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
}
body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3 { font-weight: 650; letter-spacing: -0.02em; line-height: 1.2; }

.container { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--header);
  color: #fff;
  border-bottom: 1px solid #2a2e35;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--nav-h);
  gap: 16px;
}
.logo {
  font-weight: 750;
  letter-spacing: 0.08em;
  font-size: 20px;
}
.logo span { color: #c9c4bb; font-weight: 500; font-size: 12px; letter-spacing: 0.04em; margin-left: 8px; }

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid #4a4f58;
  color: #fff;
  padding: 8px 12px;
  cursor: pointer;
}

.nav { display: flex; align-items: center; gap: 4px; }
.nav-item { position: relative; }
.nav-link {
  display: block;
  padding: 10px 12px;
  font-size: 14px;
  color: #d7dbe2;
}
.nav-link:hover, .nav-item:hover > .nav-link { color: #fff; }
.dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 280px;
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
  box-shadow: 0 12px 32px rgba(0,0,0,.12);
  padding: 8px 0;
}
.nav-item:hover > .dropdown,
.nav-item:focus-within > .dropdown { display: block; }
.dropdown a {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--steel);
}
.dropdown a:hover { background: var(--bg); }

.header-cta { display: flex; gap: 8px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary { background: var(--cta); color: #fff; }
.btn-primary:hover { background: var(--cta-hover); }
.btn-ghost { background: transparent; color: #fff; border-color: #5a616c; }
.btn-ghost.dark { color: var(--ink); border-color: var(--line); }
.btn-ghost.dark:hover { background: var(--bg); }

.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 32px;
  align-items: center;
  padding: 56px 0 40px;
}
.hero h1 { font-size: clamp(32px, 4vw, 48px); margin: 0 0 12px; }
.lead { font-size: 18px; color: var(--muted); margin: 0 0 24px; max-width: 36em; }
.hero p.lead { font-size: 18px; color: var(--muted); margin: 0 0 24px; max-width: 36em; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.kicker { font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }

.ph {
  background: var(--placeholder);
  border: 1px dashed #b9b3a8;
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 20px;
  font-size: 13px;
}
.ph-hero { min-height: 340px; }
.ph-card { min-height: 160px; }
.ph-gallery { min-height: 180px; }

.section { padding: 40px 0; }
.section h2 { margin: 0 0 8px; font-size: 28px; }
.section .intro { color: var(--muted); margin: 0 0 24px; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 0 0 16px;
}
.card-body { padding: 16px 16px 0; }
.card h3 { margin: 0 0 6px; font-size: 18px; }
.card p { margin: 0 0 12px; color: var(--muted); font-size: 14px; }
.card .meta { font-size: 12px; color: var(--muted); }

.page-hero {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  padding: 36px 0;
}
.page-hero h1 { margin: 0 0 8px; font-size: clamp(28px, 3.5vw, 40px); }
.breadcrumb { font-size: 13px; color: var(--muted); margin-bottom: 10px; }
.breadcrumb a { text-decoration: underline; text-underline-offset: 3px; }

.product-hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: start;
}
.product-layout { padding: 32px 0 56px; }
.block { background: var(--surface); border: 1px solid var(--line); padding: 24px; margin-bottom: 16px; }
.block h2 { margin: 0 0 12px; font-size: 22px; }
.muted { color: var(--muted); }
.note {
  background: #f0eee8;
  border-left: 3px solid var(--steel);
  padding: 10px 12px;
  font-size: 14px;
  color: var(--steel);
  margin: 12px 0 0;
}

table.params { width: 100%; border-collapse: collapse; }
table.params th, table.params td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}
table.params th { width: 40%; color: var(--muted); font-weight: 600; }

.feature-list, .faq { margin: 0; padding: 0; list-style: none; }
.feature-list li, .ol-process li { padding: 8px 0; border-bottom: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); padding: 12px 0; }
.faq-item strong { display: block; margin-bottom: 4px; }

.flow {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: stretch;
}
.flow-step {
  flex: 1 1 110px;
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 14px 12px;
  min-height: 96px;
}
.flow-step .n { font-size: 11px; letter-spacing: 0.1em; color: var(--muted); }
.flow-step strong { display: block; margin-top: 6px; }
.flow-step span { display: block; font-size: 13px; color: var(--muted); }
.flow-arrow {
  display: flex;
  align-items: center;
  color: var(--muted);
  font-size: 20px;
  flex: 0 0 auto;
}

/* 首页 Process Flow */
.process-section { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.flow--home {
  flex-wrap: nowrap;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 8px;
  align-items: stretch;
}
.flow-card {
  flex: 1 1 0;
  min-width: 148px;
  max-width: 180px;
  background: var(--bg);
  border: 1px solid var(--line);
  color: inherit;
  display: flex;
  flex-direction: column;
  transition: border-color .15s ease, transform .15s ease;
}
.flow-card:hover {
  border-color: #9a948a;
  transform: translateY(-2px);
}
.flow-card--core {
  border-color: #8a8378;
  box-shadow: 0 0 0 1px #8a8378;
  background: #fff;
}
.flow-card--core .flow-stage { color: var(--cta); }
.ph-flow {
  min-height: 96px;
  font-size: 12px;
  border: 0;
  border-bottom: 1px dashed #b9b3a8;
}
.flow-card-body { padding: 12px 12px 14px; display: flex; flex-direction: column; flex: 1; }
.flow-card .n { font-size: 11px; letter-spacing: 0.1em; color: var(--muted); }
.flow-stage { display: block; margin-top: 4px; font-size: 15px; }
.flow-equip { display: block; margin-top: 4px; font-size: 13px; font-weight: 600; color: var(--steel); }
.flow-purpose { margin: 8px 0 12px; font-size: 12px; color: var(--muted); line-height: 1.4; flex: 1; }
.flow-link {
  font-size: 12px;
  font-weight: 600;
  color: var(--cta);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.process-cta { margin-top: 28px; text-align: center; }
.process-cta .btn { margin-bottom: 12px; }
.process-note { margin: 0; font-size: 14px; color: var(--muted); }

/* Complete Line Solutions — 比普通产品卡更大 */
.grid-solutions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.card--solution { display: block; }
.ph-solution { min-height: 240px; }
.card--solution h3 { font-size: 22px; }
.card--solution .card-body { padding: 20px 20px 24px; }

.cta-band {
  background: var(--steel);
  color: #fff;
  padding: 36px 0;
  margin-top: 8px;
}
.cta-band h2 { margin: 0 0 8px; }
.cta-band p { color: #c9cdd4; margin: 0 0 16px; }

.site-footer {
  background: var(--header);
  color: #b7bcc4;
  padding: 36px 0 20px;
  font-size: 14px;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 24px; margin-bottom: 24px; }
.site-footer h4 { color: #fff; margin: 0 0 10px; font-size: 14px; }
.site-footer a { display: block; padding: 3px 0; color: #b7bcc4; }
.site-footer a:hover { color: #fff; }
.copyright { border-top: 1px solid #2a2e35; padding-top: 14px; font-size: 12px; }

.placeholder-page { padding: 48px 0 72px; }

@media (max-width: 960px) {
  .hero, .product-hero { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-solutions { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .ph-hero { min-height: 220px; }
  .ph-solution { min-height: 200px; }
  .flow--home { flex-wrap: wrap; }
  .flow-card { max-width: none; flex: 1 1 42%; }
}

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .header-cta { display: none; }
  .nav {
    display: none;
    position: absolute;
    left: 0; right: 0;
    top: var(--nav-h);
    background: #1c1f25;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 0 16px;
    border-bottom: 1px solid #2a2e35;
  }
  .nav.open { display: flex; }
  .dropdown {
    position: static;
    display: none;
    min-width: 0;
    background: #111317;
    color: #fff;
    border: 0;
    box-shadow: none;
  }
  .nav-item.open > .dropdown { display: block; }
  .dropdown a { color: #d7dbe2; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .flow { flex-direction: column; }
  .flow-arrow { transform: rotate(90deg); justify-content: center; }
  .flow--home {
    flex-direction: column;
    flex-wrap: nowrap;
    overflow: visible;
  }
  .flow--home .flow-card {
    max-width: none;
    width: 100%;
    flex: 1 1 auto;
  }
  .container { width: min(var(--max), calc(100% - 28px)); }
}