:root {
  --ink: #162128;
  --muted: #5d6b73;
  --line: #dce4e8;
  --paper: #f7f9f9;
  --white: #ffffff;
  --teal: #0d756f;
  --blue: #235b8c;
  --steel: #667782;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, "Microsoft YaHei", "Noto Sans TC", sans-serif; color: var(--ink); background: var(--white); line-height: 1.6; }
a { color: inherit; text-decoration: none; }
.site-header { position: sticky; top: 0; z-index: 10; display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 16px clamp(18px, 4vw, 64px); background: rgba(255,255,255,.94); border-bottom: 1px solid var(--line); backdrop-filter: blur(10px); }
.brand { font-weight: 800; color: var(--ink); }
nav { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; font-size: 14px; color: var(--muted); }
nav a:hover { color: var(--teal); }
.language { padding: 6px 10px; border: 1px solid var(--line); border-radius: 6px; color: var(--ink); }
.nav-model-search { position: relative; display: grid; grid-template-columns: 150px auto; gap: 6px; align-items: center; }
.nav-model-search input { min-height: 34px; padding: 7px 9px; border-radius: 6px; font-size: 13px; text-transform: uppercase; background: var(--white); }
.nav-model-search button { min-height: 34px; padding: 7px 10px; border-radius: 6px; font-size: 13px; }
.nav-model-search .search-message { position: absolute; top: calc(100% + 6px); left: 0; width: 230px; min-height: 0; padding: 6px 8px; border: 1px solid #f0c9c3; border-radius: 6px; background: #fff7f5; color: #b33b2e; font-size: 12px; line-height: 1.35; box-shadow: 0 8px 18px rgba(18,32,38,.08); }
.nav-model-search .search-message:empty { display: none; }
.hero { position: relative; min-height: 620px; display: grid; align-items: center; overflow: hidden; background: #111b20; }
.hero img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .68; }
.hero:after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(10,18,22,.88), rgba(10,18,22,.44), rgba(10,18,22,.08)); }
.hero-copy { position: relative; z-index: 1; max-width: 740px; padding: 72px clamp(22px, 6vw, 90px); color: white; }
.eyebrow { margin: 0 0 12px; color: #76d3cb; font-size: 13px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
h1 { margin: 0; font-size: clamp(38px, 6vw, 72px); line-height: 1.04; letter-spacing: 0; }
h2 { margin: 0 0 16px; font-size: clamp(26px, 4vw, 38px); line-height: 1.16; letter-spacing: 0; }
p { margin: 0 0 18px; }
.hero-copy p:not(.eyebrow) { max-width: 620px; font-size: 19px; color: rgba(255,255,255,.88); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.button, button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 12px 18px; border-radius: 6px; border: 1px solid transparent; font-weight: 800; cursor: pointer; }
.primary, button { background: var(--teal); color: white; }
.secondary { background: rgba(255,255,255,.14); color: white; border-color: rgba(255,255,255,.4); }
.section { padding: 70px clamp(20px, 5vw, 72px); }
.intro { display: grid; grid-template-columns: minmax(240px, .7fr) minmax(0, 1.3fr); gap: 38px; align-items: start; }
.model-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.model-card { min-height: 150px; padding: 20px; border: 1px solid var(--line); border-radius: 8px; background: var(--white); transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease; }
.model-card:hover { transform: translateY(-3px); border-color: #9fc9c5; box-shadow: 0 12px 28px rgba(18,32,38,.08); }
.series { display: block; color: var(--blue); font-size: 12px; font-weight: 800; text-transform: uppercase; }
.model-card strong { display: block; margin: 8px 0; font-size: 20px; line-height: 1.25; }
.model-card small { color: var(--muted); font-size: 14px; }
.band { background: var(--paper); }
.pill-row { display: flex; flex-wrap: wrap; gap: 10px; }
.pill-row span { padding: 9px 12px; border-radius: 6px; background: var(--white); border: 1px solid var(--line); color: var(--ink); }
.model-search-section { display: grid; grid-template-columns: minmax(240px, .8fr) minmax(280px, 1.2fr); gap: 28px; align-items: center; background: var(--paper); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.model-search-section h2 { margin-bottom: 8px; }
.model-search-section p { color: var(--muted); }
.model-search { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; align-items: start; }
.model-search input { min-height: 50px; background: var(--white); font-weight: 700; text-transform: uppercase; }
.model-search button { min-height: 50px; white-space: nowrap; }
.search-message { grid-column: 1 / -1; min-height: 24px; margin: 0; color: #b33b2e; font-weight: 700; }
.bearing-filter { background: var(--paper); border-top: 1px solid var(--line); }
.filter-head { display: flex; justify-content: space-between; gap: 18px; align-items: end; margin-bottom: 18px; }
.filter-head h2 { margin: 0; }
.filter-count { margin: 0; color: var(--muted); font-weight: 800; white-space: nowrap; }
.dimension-filter-controls { display: grid; grid-template-columns: repeat(3, minmax(180px, 1fr)) auto; gap: 14px; align-items: end; margin-bottom: 18px; }
.range-field { display: grid; gap: 8px; padding: 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--white); }
.range-label { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; color: var(--steel); font-size: 13px; font-weight: 800; }
.range-label output { color: var(--ink); white-space: nowrap; }
.range-pair { display: grid; gap: 4px; }
.range-pair input { width: 100%; min-height: 24px; padding: 0; border: 0; accent-color: var(--teal); background: transparent; }
.dimension-filter-controls button { min-height: 42px; white-space: nowrap; }
.filter-results [hidden] { display: none; }
.inquiry { display: grid; grid-template-columns: minmax(240px, .8fr) minmax(280px, 1.2fr); gap: 36px; align-items: start; }
.contact-methods { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin: 18px 0 0; }
.contact-card { display: grid; gap: 8px; align-content: start; min-height: 92px; padding: 14px; border: 1px solid var(--line); border-radius: 8px; background: var(--white); color: var(--ink); overflow: hidden; }
.contact-card strong { color: var(--teal); font-size: 14px; }
.contact-card span { color: var(--muted); overflow-wrap: anywhere; }
.wechat-card img { width: min(180px, 100%); aspect-ratio: 1 / 1; object-fit: contain; border: 1px solid var(--line); border-radius: 6px; background: var(--white); }
form { display: grid; gap: 12px; }
input, textarea { width: 100%; min-height: 44px; padding: 12px; border: 1px solid var(--line); border-radius: 6px; font: inherit; }
textarea { min-height: 120px; resize: vertical; }
.page-head { padding: 78px clamp(20px, 5vw, 72px) 30px; background: var(--paper); }
.page-head p { max-width: 760px; color: var(--muted); }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; padding: 18px clamp(20px, 5vw, 72px); border-bottom: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.breadcrumb a { color: var(--blue); }
.model-hero { display: grid; grid-template-columns: minmax(280px, .9fr) minmax(280px, 1.1fr); gap: 38px; align-items: center; padding: 68px clamp(20px, 5vw, 72px); background: var(--paper); }
.model-hero h1 { color: var(--ink); font-size: clamp(36px, 5vw, 64px); }
.model-hero p:not(.eyebrow) { max-width: 680px; color: var(--muted); }
.model-hero img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; border-radius: 8px; }
.product-photo-slot { border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--white); }
.product-photo-slot h2 { margin: 16px 18px 8px; font-size: 22px; line-height: 1.25; }
.product-photo-slot p { margin: 0 18px 18px; color: var(--muted); }
.product-photo-slot .hero-photo { aspect-ratio: 4 / 3; border-bottom: 1px solid var(--line); font-size: 18px; }
.product-photo-img { display: block; width: 100%; object-fit: cover; background: var(--paper); }
.drawing-wrap { position: relative; background: var(--white); border: 1px solid var(--line); border-radius: 8px; padding: 14px; overflow: hidden; }
.dimension-summary { display: flex; flex-wrap: wrap; gap: 8px; margin: -8px 0 14px; }
.dimension-summary span { display: inline-flex; align-items: baseline; gap: 6px; min-height: 34px; padding: 7px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--white); color: var(--muted); font-size: 13px; }
.dimension-summary strong { color: var(--ink); font-size: 14px; }
.dimension-drawing { display: block; width: 100%; max-width: 100%; height: auto; object-fit: contain; background: var(--white); border: 0; padding: 0; }
.drawing-placeholder { min-height: 260px; display: grid; place-items: center; color: var(--steel); font-weight: 800; background: repeating-linear-gradient(45deg, #f4f7f7, #f4f7f7 10px, #eef3f3 10px, #eef3f3 20px); }
.drawing-label { position: absolute; padding: 3px 7px; border-radius: 5px; background: rgba(255,255,255,.94); border: 1px solid #9fb3bd; color: var(--ink); font-size: 12px; font-weight: 800; line-height: 1.2; box-shadow: 0 2px 7px rgba(18,32,38,.08); white-space: nowrap; }
.label-d { top: 7%; left: 27%; }
.label-D { top: 39%; left: 27%; }
.label-B { top: 23%; left: 45%; }
.label-dp { bottom: 16%; left: 45%; }
.label-ds { bottom: 38%; left: 24%; }
.label-Dh { bottom: 8%; left: 24%; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: start; }
.info-panel { padding: 24px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); }
.info-panel p { margin-bottom: 14px; }
.info-panel p:last-child { margin-bottom: 0; }
.faq-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.faq-grid article { padding: 18px; border: 1px solid var(--line); border-radius: 8px; background: var(--white); }
.faq-grid h3 { margin: 0 0 8px; font-size: 18px; line-height: 1.3; }
.section-lead { max-width: 820px; margin-bottom: 24px; }
.product-intro { background: var(--white); border-bottom: 1px solid var(--line); }
.intro-points { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; }
.intro-points article { min-height: 118px; padding: 18px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); }
.intro-points p { margin: 0; color: var(--muted); }
.photo-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.photo-grid article { border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--white); }
.photo-grid img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; display: block; background: var(--paper); }
.photo-placeholder { display: grid; place-items: center; aspect-ratio: 4 / 3; background: repeating-linear-gradient(45deg, #f4f7f7, #f4f7f7 10px, #eef3f3 10px, #eef3f3 20px); border-bottom: 1px solid var(--line); color: var(--steel); font-weight: 800; }
.photo-grid h3 { margin: 16px 16px 8px; font-size: 18px; line-height: 1.3; }
.photo-grid p { margin: 0 16px 18px; color: var(--muted); }
table { width: 100%; border-collapse: collapse; border: 1px solid var(--line); }
th, td { text-align: left; padding: 13px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { width: 34%; background: var(--paper); color: var(--steel); }
.site-footer { padding: 28px clamp(20px, 5vw, 72px); border-top: 1px solid var(--line); color: var(--muted); display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.site-footer p { margin: 0; }
@media (max-width: 760px) {
  .site-header { position: static; align-items: flex-start; flex-direction: column; }
  nav, .nav-model-search { width: 100%; }
  .nav-model-search { grid-template-columns: minmax(0, 1fr) auto; }
  .nav-model-search .search-message { position: static; grid-column: 1 / -1; width: auto; }
  .hero { min-height: 560px; }
  .hero-copy { padding-top: 52px; padding-bottom: 52px; }
  .intro, .inquiry, .model-hero, .two-col, .model-search-section, .model-search-section .model-search, .dimension-filter-controls { grid-template-columns: 1fr; }
  .filter-head { align-items: start; flex-direction: column; }
  .model-hero { padding-top: 42px; }
  h1 { font-size: 38px; }
}