@import url("tokens.css");

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--body);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { color: var(--ink); text-wrap: balance; margin: 0; line-height: 1.2; }
::selection { background: var(--accent); color: #fff; }
:focus-visible { outline: 2px solid var(--accent-d); outline-offset: 3px; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 36px; }
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.skip {
  position: absolute; left: -9999px; top: 0; z-index: 400;
  background: var(--accent-d); color: #fff; padding: 10px 16px; font-size: 0.85rem;
}
.skip:focus { left: 12px; top: 12px; }

/* ── 页头 ───────────────────────────────────────────────── */
.util {
  background: var(--steel-deep); color: #AEB9C3; font-size: 0.76rem;
  letter-spacing: 0.04em; border-bottom: 1px solid var(--line-dark);
}
.util .wrap { display: flex; justify-content: space-between; gap: 18px; min-height: 32px; align-items: center; }
.util a:hover { color: #fff; }
.util .dot { color: var(--accent); margin: 0 8px; }

.site-header {
  position: sticky; top: 0; z-index: 120;
  background: rgba(44, 62, 80, 0.98);
  border-bottom: 1px solid var(--line-dark);
  backdrop-filter: saturate(1.2) blur(6px);
}
.site-header .wrap { display: flex; align-items: center; gap: 26px; min-height: var(--header-h); }
.logo { display: flex; align-items: baseline; gap: 9px; flex: none; }
.logo-mark {
  font-family: var(--sans); font-weight: 800; font-size: 1.62rem; letter-spacing: -0.03em;
  color: var(--accent); line-height: 1;
}
.logo-cn { color: #D7DEE5; font-size: 0.78rem; letter-spacing: 0.18em; }
.nav { display: flex; align-items: center; gap: 2px; margin-left: auto; }
.nav a {
  color: #D5DDE4; font-size: 0.9rem; padding: 8px 11px; border-radius: 2px;
  position: relative; white-space: nowrap;
}
.nav a:hover, .nav a[aria-current="page"] { color: #fff; background: rgba(255, 255, 255, 0.07); }
.nav a[aria-current="page"]::after {
  content: ""; position: absolute; left: 11px; right: 11px; bottom: 2px;
  height: 2px; background: var(--accent);
}
.header-tools { display: flex; align-items: center; gap: 10px; }
.icon-btn {
  width: 38px; height: 38px; display: grid; place-items: center;
  border: 1px solid var(--line-dark); background: transparent; color: #D5DDE4; border-radius: 2px;
}
.icon-btn:hover { color: #fff; border-color: rgba(255, 255, 255, 0.42); }
.menu-btn { display: none; }

/* ── 按钮 ───────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 46px; padding: 11px 22px; border: 1px solid transparent;
  font-size: 0.92rem; font-weight: 600; letter-spacing: 0.02em; border-radius: var(--radius);
  transition: background 160ms var(--ease), color 160ms var(--ease), border-color 160ms var(--ease);
}
.btn-primary { background: var(--accent-d); color: #fff; }
.btn-primary:hover { background: #9E2F24; }
.btn-ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--steel); background: #fff; }
.btn-on-dark { border-color: rgba(255, 255, 255, 0.36); color: #fff; background: transparent; }
.btn-on-dark:hover { background: rgba(255, 255, 255, 0.1); border-color: #fff; }
.btn-sm { min-height: 38px; padding: 7px 14px; font-size: 0.82rem; }
.arrow { font-family: var(--mono); font-size: 0.95em; }

/* ── 通用区块 ───────────────────────────────────────────── */
.section { padding: 82px 0; }
.section-tight { padding: 56px 0; }
.section-alt { background: var(--paper-2); }
.section-dark { background: var(--steel); color: #C7D0D8; }
.section-dark h1, .section-dark h2, .section-dark h3 { color: #fff; }

.kicker {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--accent-d); margin-bottom: 16px;
}
.kicker::before { content: ""; width: 30px; height: 2px; background: var(--accent); }
.section-dark .kicker { color: var(--accent-l); }

.section-head { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: 48px; align-items: end; margin-bottom: 38px; }
.section-head h2 { font-size: clamp(1.8rem, 2.9vw, 2.45rem); letter-spacing: -0.01em; }
.section-head .lead { font-size: 1rem; color: var(--muted); max-width: 46em; margin: 0; }
.section-dark .section-head .lead { color: #B9C4CD; }
.section-head.stack { display: block; }
.section-head.stack .lead { margin-top: 14px; }

/* ── 首页 Hero ──────────────────────────────────────────── */
.hero { background: var(--steel); color: #C8D2DA; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0.35) 70%, transparent 100%);
}
.hero .wrap { position: relative; z-index: 1; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: 54px; align-items: center; padding: 74px 0 52px; }
.hero-eyebrow {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.2em; color: var(--accent-l);
  text-transform: uppercase; margin-bottom: 20px;
}
.hero h1 {
  color: #fff; font-size: clamp(2.55rem, 5.4vw, 4.7rem); font-weight: 800;
  letter-spacing: -0.035em; line-height: 1.03; white-space: pre-line;
}
.hero h1 em { font-style: normal; color: var(--accent); }
.hero-sub { margin: 24px 0 0; max-width: 34em; font-size: 1.04rem; color: #C4CFD8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-stats {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line-dark); margin: 0; padding: 20px 0 26px;
}
.hero-stats div { padding-right: 14px; }
.hero-stats .n { color: #fff; font-family: var(--mono); font-size: 1.45rem; font-weight: 600; line-height: 1.2; }
.hero-stats .l { color: #A9B6C1; font-size: 0.76rem; line-height: 1.45; margin-top: 4px; }
.hero-art { position: relative; }
.hero-tiles { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.hero-tile {
  background: var(--paper); border: 1px solid rgba(255, 255, 255, 0.14);
  padding: 14px 14px 12px; position: relative;
}
.hero-tile img { width: 100%; height: 190px; object-fit: contain; }
.hero-tile .cap { display: flex; justify-content: space-between; gap: 8px; margin-top: 8px; font-size: 0.72rem; color: var(--muted); }
.hero-tile .cap b { font-family: var(--mono); color: var(--accent-d); font-weight: 600; }
.hero-tile:nth-child(2), .hero-tile:nth-child(3) { transform: translateY(18px); }
.hero-note { margin-top: 34px; font-family: var(--mono); font-size: 0.7rem; color: #8D9BA8; letter-spacing: 0.06em; }

/* ── 系列 / 分类卡片 ────────────────────────────────────── */
.series-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.series-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.series-card {
  background: #FBFAF6; border: 1px solid var(--line); display: flex; flex-direction: column;
  transition: border-color 160ms var(--ease), transform 160ms var(--ease), box-shadow 160ms var(--ease);
}
.series-card:hover { border-color: var(--steel); transform: translateY(-2px); box-shadow: 0 18px 36px -30px rgba(23, 33, 43, 0.6); }
.series-art { background: var(--paper-2); border-bottom: 1px solid var(--line); overflow: hidden; }
.series-art img { width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; }
.series-body { padding: 18px 18px 20px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.series-top { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }
.series-top h3 { font-size: 1.18rem; }
.series-top .count { font-family: var(--mono); font-size: 0.72rem; color: var(--muted); white-space: nowrap; }
.series-body p { margin: 0; font-size: 0.88rem; line-height: 1.65; color: var(--muted); }
.series-range { margin-top: auto; font-family: var(--mono); font-size: 0.72rem; color: var(--steel); border-top: 1px solid var(--line-soft); padding-top: 10px; }

/* ── 产品卡 ─────────────────────────────────────────────── */
.product-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.product-card {
  background: #FBFAF6; border: 1px solid var(--line); display: flex; flex-direction: column;
  transition: border-color 160ms var(--ease), transform 160ms var(--ease);
}
.product-card:hover { border-color: var(--steel); transform: translateY(-2px); }
.pc-media { background: var(--paper-2); aspect-ratio: 4 / 5; position: relative; overflow: hidden; }
.pc-media img { position: absolute; inset: 8px; width: calc(100% - 16px); height: calc(100% - 16px); object-fit: contain; }
.pc-body { padding: 13px 14px 15px; display: flex; flex-direction: column; gap: 5px; flex: 1; }
.pc-model { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.08em; color: var(--accent-d); }
.pc-name { font-size: 0.98rem; line-height: 1.4; color: var(--ink); }
.pc-tag { font-size: 0.76rem; color: var(--muted); line-height: 1.5; }
.pc-series { margin-top: auto; padding-top: 8px; font-size: 0.7rem; color: var(--muted); display: flex; justify-content: space-between; gap: 8px; }
.pc-series span:last-child { font-family: var(--mono); }

/* ── 表格 ───────────────────────────────────────────────── */
.table-scroll { overflow: visible; min-width: 0; max-width: 100%; }
.data-table { width: 100%; border-collapse: collapse; background: #FBFAF6; border: 1px solid var(--line); }
.data-table th, .data-table td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
.data-table thead th {
  position: sticky; top: calc(var(--header-h) + 1px); z-index: 30;
  background: var(--steel); color: #fff; font-size: 0.76rem; font-weight: 600;
  letter-spacing: 0.05em; border-bottom: 1px solid var(--steel-deep);
}
.data-table tbody tr:hover { background: #F2EEE6; }
.data-table td { font-size: 0.87rem; }
.data-table .model-cell { font-family: var(--mono); font-size: 0.82rem; color: var(--ink); white-space: nowrap; }
.data-table .num { font-family: var(--mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
.table-note { margin-top: 12px; font-size: 0.78rem; color: var(--muted); }

/* ── 筛选 ───────────────────────────────────────────────── */
.filter-bar {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  padding: 14px 0 22px; border-bottom: 1px solid var(--line); margin-bottom: 24px;
}
.chip {
  border: 1px solid var(--line); background: transparent; padding: 7px 13px;
  font-size: 0.82rem; color: var(--body); border-radius: 999px; white-space: nowrap;
}
.chip:hover { border-color: var(--steel); color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--steel); border-color: var(--steel); color: #fff; }
.filter-count { margin-left: auto; font-family: var(--mono); font-size: 0.76rem; color: var(--muted); }

.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 0.78rem; color: var(--muted); }
.field input, .field select, .field textarea {
  border: 1px solid var(--line); background: #fff; padding: 10px 12px; min-height: 44px;
  font-size: 0.9rem; border-radius: 2px; width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--steel); outline: none; }
.field textarea { min-height: 120px; resize: vertical; }

.selector-bar {
  display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 12px;
  background: var(--paper-2); border: 1px solid var(--line); padding: 18px; margin-bottom: 26px;
}
.selector-bar .wide { grid-column: span 2; }
.selector-bar .actions { display: flex; align-items: flex-end; gap: 8px; }
.selector-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.selector-head h2 { font-size: 1.15rem; }
.selector-head .count { font-family: var(--mono); font-size: 0.82rem; color: var(--muted); }

/* ── 产品详情 ───────────────────────────────────────────── */
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: 0.78rem; color: var(--muted); padding: 18px 0 0; }
.breadcrumb a:hover { color: var(--accent-d); }
.breadcrumb .sep { color: var(--line); }

.product-hero { display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr); gap: 46px; padding: 26px 0 56px; align-items: start; }
.gallery-main { background: var(--paper-2); border: 1px solid var(--line); aspect-ratio: 4 / 5; position: relative; }
.gallery-main img { position: absolute; inset: 14px; width: calc(100% - 28px); height: calc(100% - 28px); object-fit: contain; }
.gallery-thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: 8px; }
.thumb { background: var(--paper-2); border: 1px solid var(--line); aspect-ratio: 1; position: relative; }
.thumb img { position: absolute; inset: 4px; width: calc(100% - 8px); height: calc(100% - 8px); object-fit: contain; }
.thumb[aria-pressed="true"] { border-color: var(--accent-d); }
.gallery-note { margin-top: 10px; font-size: 0.74rem; color: var(--muted); }
.product-info .kicker { margin-bottom: 12px; }
.product-info h1 { font-size: clamp(1.8rem, 3.4vw, 2.7rem); letter-spacing: -0.015em; }
.product-info h1 .model { display: block; font-family: var(--mono); font-size: 0.44em; letter-spacing: 0.08em; color: var(--accent-d); margin-bottom: 8px; }
.product-lead { margin: 14px 0 0; font-size: 0.98rem; color: var(--muted); }
.key-specs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); margin: 24px 0; }
.key-spec { background: #FBFAF6; padding: 12px 14px; }
.key-spec dt { font-size: 0.72rem; color: var(--muted); margin: 0 0 3px; }
.key-spec dd { margin: 0; font-size: 0.9rem; color: var(--ink); font-weight: 500; }
.buy-row { display: flex; flex-wrap: wrap; gap: 10px; }
.source-line { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line); font-size: 0.76rem; color: var(--muted); line-height: 1.6; }
.source-line a { color: var(--accent-d); text-decoration: underline; text-underline-offset: 3px; }

.detail-grid { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: 46px; padding: 46px 0; border-top: 1px solid var(--line); }
.detail-grid > *, .product-hero > * { min-width: 0; }
.detail-grid h2 { font-size: 1.35rem; margin-bottom: 14px; }
.spec-list { display: grid; grid-template-columns: minmax(9em, 0.6fr) minmax(0, 1fr); border-top: 1px solid var(--line); }
.spec-list dt, .spec-list dd { margin: 0; padding: 10px 0; border-bottom: 1px solid var(--line-soft); font-size: 0.9rem; }
.spec-list dt { color: var(--muted); }
.spec-list dd { color: var(--ink); }
.prose p { margin: 0 0 1em; font-size: 0.96rem; }
.prose p:last-child { margin-bottom: 0; }

.notice {
  border-left: 3px solid var(--accent); background: var(--accent-soft);
  padding: 12px 16px; font-size: 0.82rem; color: #6B2C23; margin: 14px 0 0;
}
.notice-soft { border-left-color: var(--steel); background: var(--paper-2); color: var(--muted); }

/* ── CTA ────────────────────────────────────────────────── */
.cta-band { background: var(--steel); color: #C7D0D8; padding: 62px 0; }
.cta-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr); gap: 40px; align-items: center; }
.cta-band h2 { color: #fff; font-size: clamp(1.7rem, 3vw, 2.35rem); }
.cta-band p { margin: 12px 0 0; max-width: 40em; font-size: 0.96rem; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; }

/* ── 应用 ───────────────────────────────────────────────── */
.app-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.app-card { border: 1px solid var(--line); background: #FBFAF6; padding: 22px; display: flex; flex-direction: column; gap: 10px; min-height: 188px; }
.app-card:hover { border-color: var(--steel); }
.app-card .num { font-family: var(--mono); font-size: 0.72rem; color: var(--accent-d); }
.app-card h3 { font-size: 1.06rem; }
.app-card p { margin: 0; font-size: 0.83rem; color: var(--muted); line-height: 1.65; }
.app-card .more { margin-top: auto; font-size: 0.76rem; color: var(--steel); font-family: var(--mono); }

/* ── 资料 ───────────────────────────────────────────────── */
.doc-list { border-top: 1px solid var(--line); }
.doc-row { display: grid; grid-template-columns: 86px minmax(0, 1fr) auto; gap: 22px; align-items: center; padding: 20px 0; border-bottom: 1px solid var(--line); }
.doc-icon { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; color: #fff; background: var(--steel); padding: 8px 0; text-align: center; }
.doc-row h3 { font-size: 1rem; }
.doc-row p { margin: 3px 0 0; font-size: 0.8rem; color: var(--muted); }
.doc-meta { font-size: 0.74rem; color: var(--muted); font-family: var(--mono); text-align: right; white-space: nowrap; }
.lang-tag { display: inline-block; border: 1px solid var(--line); padding: 1px 6px; font-size: 0.68rem; font-family: var(--mono); color: var(--steel); margin-left: 6px; }

/* ── 知识 ───────────────────────────────────────────────── */
.article-list { display: grid; gap: 0; border-top: 1px solid var(--line); }
.article-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px; padding: 24px 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.article-row h3 { font-size: 1.2rem; }
.article-row h3 a:hover { color: var(--accent-d); }
.article-row p { margin: 5px 0 0; font-size: 0.86rem; color: var(--muted); }
.article-row .meta { font-family: var(--mono); font-size: 0.72rem; color: var(--muted); white-space: nowrap; }
.article { max-width: 50em; }
.article h1 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); }
.article .summary { font-size: 1.05rem; color: var(--muted); margin: 16px 0 30px; }
.article .body p { font-size: 1rem; margin: 0 0 1.25em; }
.article .related { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--line); }
.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary { cursor: pointer; padding: 18px 0; font-size: 1rem; color: var(--ink); font-weight: 500; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-family: var(--mono); color: var(--accent-d); }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { margin: 0 0 18px; font-size: 0.92rem; color: var(--muted); max-width: 54em; }

/* ── 页脚 ───────────────────────────────────────────────── */
.site-footer { background: var(--steel-deep); color: #9FADB8; padding: 58px 0 26px; font-size: 0.84rem; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.3fr; gap: 40px; padding-bottom: 38px; border-bottom: 1px solid var(--line-dark); }
.footer-brand .logo { margin-bottom: 12px; }
.footer-brand p { margin: 0; max-width: 30em; line-height: 1.7; }
.footer-col h4 { color: #fff; font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 12px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 7px; }
.footer-col a:hover { color: #fff; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; padding-top: 20px; font-size: 0.74rem; color: #7E8D99; }
.footer-bottom a { text-decoration: underline; text-underline-offset: 3px; }

/* ── 表单 / 联系 ────────────────────────────────────────── */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: 48px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-grid .full { grid-column: 1 / -1; }
.form-note { font-size: 0.76rem; color: var(--muted); margin-top: 10px; }
.form-msg { margin-top: 14px; font-size: 0.88rem; }
.form-msg.ok { color: var(--ok); }
.form-msg.err { color: var(--accent-d); }
.contact-card { background: var(--paper-2); border: 1px solid var(--line); padding: 26px; }
.contact-card dl { margin: 0; display: grid; grid-template-columns: 6em minmax(0, 1fr); gap: 10px 12px; font-size: 0.9rem; }
.contact-card dt { color: var(--muted); }
.contact-card dd { margin: 0; color: var(--ink); }
.contact-card a { color: var(--accent-d); }

/* ── 搜索 ───────────────────────────────────────────────── */
.search-box { display: flex; gap: 8px; max-width: 720px; }
.search-box input { flex: 1; min-height: 52px; border: 1px solid var(--line); background: #fff; padding: 0 16px; font-size: 1rem; }
.search-results { margin-top: 26px; display: grid; gap: 0; border-top: 1px solid var(--line); }
.sr-row { display: grid; grid-template-columns: 110px minmax(0, 1fr) auto; gap: 18px; padding: 15px 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.sr-type { font-family: var(--mono); font-size: 0.68rem; color: var(--accent-d); letter-spacing: 0.06em; }
.sr-row h3 { font-size: 1rem; }
.sr-row p { margin: 2px 0 0; font-size: 0.8rem; color: var(--muted); }
.sr-row .go { font-family: var(--mono); font-size: 0.72rem; color: var(--muted); }
.empty { padding: 34px 0; color: var(--muted); font-size: 0.9rem; }

/* ── 面包屑 / 页头区 ────────────────────────────────────── */
.page-head { padding: 42px 0 34px; border-bottom: 1px solid var(--line); }
.page-head h1 { font-size: clamp(2rem, 4vw, 3.1rem); letter-spacing: -0.02em; }
.page-head p { margin: 14px 0 0; max-width: 52em; color: var(--muted); font-size: 0.98rem; }
.page-head .meta { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }

/* ── 响应式 ─────────────────────────────────────────────── */
@media (max-width: 1180px) {
  .product-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .app-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .selector-bar { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .selector-bar .wide { grid-column: span 2; }
}

@media (max-width: 980px) {
  .wrap { padding: 0 24px; }
  .nav { display: none; }
  .menu-btn { display: grid; }
  .site-header .wrap { justify-content: space-between; }
  .nav.open {
    display: flex; position: absolute; left: 0; right: 0; top: var(--header-h);
    background: var(--steel-deep); flex-direction: column; align-items: stretch;
    padding: 10px 16px 18px; gap: 2px; border-bottom: 1px solid var(--line-dark);
  }
  .nav.open a { padding: 12px 10px; font-size: 0.98rem; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; padding-top: 52px; }
  .hero-tile:nth-child(2), .hero-tile:nth-child(3) { transform: none; }
  .hero-tile img { height: 160px; }
  .section-head { grid-template-columns: 1fr; gap: 16px; }
  .series-grid, .series-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .product-hero { grid-template-columns: minmax(0, 1fr); gap: 30px; }
  .detail-grid { grid-template-columns: minmax(0, 1fr); gap: 30px; }
  .cta-grid { grid-template-columns: 1fr; }
  .cta-actions { justify-content: flex-start; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .selector-bar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .selector-bar .wide { grid-column: span 2; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .section { padding: 58px 0; }
  .util .wrap { min-height: 30px; font-size: 0.7rem; }
  .util .hide-sm { display: none; }
  .hero h1 { font-size: clamp(2.2rem, 10vw, 3.1rem); }
  .hero-stats { grid-template-columns: 1fr 1fr; row-gap: 16px; }
  .product-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .pc-name { font-size: 0.9rem; }
  .series-grid, .series-grid.two { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: 1fr; }
  .data-table { min-width: 720px; }
  .table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .data-table thead th { position: static; }
  .doc-row { grid-template-columns: 64px minmax(0, 1fr); }
  .doc-meta { grid-column: 2; text-align: left; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .article-row { grid-template-columns: 1fr; gap: 6px; }
  .sr-row { grid-template-columns: 1fr; gap: 4px; }
  .spec-list { grid-template-columns: 1fr; }
  .spec-list dt { padding-bottom: 0; border-bottom: 0; }
  .spec-list dd { padding-top: 2px; }
  .gallery-thumbs { grid-template-columns: repeat(4, 1fr); }
  .hero-tile img { height: 128px; }
  .breadcrumb { font-size: 0.72rem; }
}

@media (max-width: 420px) {
  .wrap { padding: 0 16px; }
  .product-grid { grid-template-columns: 1fr; }
  .hero-tiles { grid-template-columns: 1fr 1fr; gap: 8px; }
  .hero-tile { padding: 8px; }
  .hero-tile img { height: 112px; }
  .logo-mark { font-size: 1.4rem; }
  .logo-cn { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}