/* ==========================================================================
   数苗科技企业官网 · 全局样式
   视觉基调：Apple 式极简（白底 / 大留白 / 墨黑标题 / 香槟金点睛）
   适配：桌面 1180 栅格，移动优先降级
   ========================================================================== */

:root {
  --ink: #101418;
  --ink-2: #39424d;
  --ink-3: #6c7683;
  --ink-4: #98a0ab;
  --line: #e7e7e2;
  --line-2: #f0f0eb;
  --bg: #ffffff;
  --soft: #f7f7f4;
  --soft-2: #fbfbf9;
  --gold: #a9803f;
  --gold-2: #c9a468;
  --gold-soft: #f5efe4;
  --max: 1180px;
  --radius: 8px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro SC", "SF Pro Text",
    "PingFang SC", "Helvetica Neue", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

::selection { background: var(--ink); color: #fff; }

/* ---------- 布局 ---------- */
.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 32px; }
.section { padding: 104px 0; }
.section--soft { background: var(--soft); }
.section--tight { padding: 72px 0; }
.divider { height: 1px; background: var(--line); border: 0; margin: 0; }

/* ---------- 顶部主体提示条 ---------- */
.topbar {
  background: var(--ink);
  color: #fff;
  font-size: 12.5px;
  letter-spacing: 0.02em;
}
.topbar .wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 38px;
  padding-top: 6px;
  padding-bottom: 6px;
  text-align: center;
  flex-wrap: wrap;
}
.topbar strong { font-weight: 600; color: #fff; }
.topbar span { color: rgba(255, 255, 255, 0.62); }
.topbar a {
  color: var(--gold-2);
  border-bottom: 1px solid rgba(201, 164, 104, 0.45);
  padding-bottom: 1px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.topbar a:hover { color: #e6c893; border-color: #e6c893; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid var(--line-2);
}
.nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 66px;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-mark {
  width: 26px; height: 26px;
  border-radius: 7px;
  background: var(--ink);
  display: grid; place-items: center;
  flex-shrink: 0;
}
.brand-mark svg { width: 14px; height: 14px; }
.brand-logo {
  width: 30px; height: 30px;
  object-fit: contain;
  flex-shrink: 0;
}
.brand-logo--light { filter: brightness(0) invert(1); opacity: 0.94; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text b { font-size: 15px; font-weight: 600; letter-spacing: 0.02em; }
.brand-text em {
  font-style: normal;
  font-size: 9.5px;
  letter-spacing: 0.14em;
  color: var(--ink-4);
  text-transform: uppercase;
  margin-top: 3px;
}

.menu { display: flex; align-items: center; gap: 2px; }
.menu a {
  position: relative;
  padding: 8px 13px;
  font-size: 14px;
  color: var(--ink-2);
  border-radius: 4px;
  transition: color 0.2s var(--ease);
  white-space: nowrap;
}
.menu a:hover { color: var(--ink); }
.menu a.active { color: var(--ink); font-weight: 600; }
.menu a.active::after {
  content: "";
  position: absolute;
  left: 13px; right: 13px; bottom: 2px;
  height: 1.5px;
  background: var(--gold);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 36px;
  padding: 0 17px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-size: 13.5px;
  font-weight: 500;
  white-space: nowrap;
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
}
.nav-cta:hover { opacity: 0.86; transform: translateY(-1px); }
.nav-cta svg { width: 13px; height: 13px; }

.burger {
  display: none;
  width: 40px; height: 40px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.burger span {
  display: block;
  width: 16px; height: 1.5px;
  background: var(--ink);
  position: relative;
}
.burger span::before, .burger span::after {
  content: ""; position: absolute; left: 0;
  width: 16px; height: 1.5px; background: var(--ink);
}
.burger span::before { top: -5px; }
.burger span::after { top: 5px; }

/* 移动菜单 */
.drawer {
  display: none;
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.drawer.open { display: block; }
.drawer a {
  display: block;
  padding: 14px 32px;
  font-size: 15px;
  border-bottom: 1px solid var(--line-2);
  color: var(--ink-2);
}
.drawer a.active { color: var(--ink); font-weight: 600; }

/* ---------- 通用排版 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 20px;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--gold-2);
}

h1, h2, h3, h4 { margin: 0; font-weight: 600; }
h1 { font-size: clamp(38px, 5.4vw, 66px); line-height: 1.08; letter-spacing: -0.028em; }
h2 { font-size: clamp(27px, 3.3vw, 40px); line-height: 1.2; letter-spacing: -0.02em; }
h3 { font-size: 19px; line-height: 1.45; letter-spacing: -0.008em; }
h4 { font-size: 15px; line-height: 1.5; }

p { margin: 0 0 1.1em; color: var(--ink-2); }
p.lead { font-size: 18px; line-height: 1.8; color: var(--ink-2); }
.muted { color: var(--ink-3); }
.small { font-size: 13.5px; line-height: 1.7; }
.tnum { font-variant-numeric: tabular-nums; }

/* 屏幕阅读器专用文本：补齐语义标题，不影响视觉呈现 */
.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;
}

.sec-head { max-width: 720px; margin-bottom: 56px; }
.sec-head p { font-size: 16.5px; color: var(--ink-3); margin: 18px 0 0; }
.sec-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-head--center .eyebrow { justify-content: center; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 26px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.22s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 14px; height: 14px; }
.btn--primary { background: var(--ink); color: #fff; }
.btn--primary:hover { background: #000; transform: translateY(-1px); box-shadow: 0 8px 22px rgba(16, 20, 24, 0.16); }
.btn--ghost { background: transparent; color: var(--ink); border-color: #d8d8d2; }
.btn--ghost:hover { border-color: var(--ink); transform: translateY(-1px); }
.btn--gold { background: var(--gold); color: #fff; }
.btn--gold:hover { background: #96702f; transform: translateY(-1px); }
.btn--sm { height: 40px; padding: 0 20px; font-size: 13.5px; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: border-color 0.2s var(--ease), gap 0.2s var(--ease);
}
.link-arrow:hover { border-color: var(--ink); gap: 10px; }
.link-arrow svg { width: 12px; height: 12px; }

/* ---------- Hero ---------- */
.hero { padding: 92px 0 88px; position: relative; overflow: hidden; }
.hero::after {
  content: "";
  position: absolute;
  top: -180px; right: -160px;
  width: 560px; height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(169, 128, 63, 0.07), rgba(169, 128, 63, 0) 68%);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; max-width: 880px; }
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 28px;
  padding: 0 13px;
  border-radius: 999px;
  background: var(--soft);
  border: 1px solid var(--line);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--ink-2);
  margin-bottom: 30px;
}
.hero-tag i {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: #2f9e6b;
  font-style: normal;
}
.hero h1 { margin-bottom: 26px; }
.hero h1.hero-name { font-size: clamp(34px, 4.6vw, 58px); }
.hero .lead { max-width: 660px; font-size: 17.5px; }
.hero .btn-row { margin-top: 38px; }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin-top: 52px;
  border-top: 1px solid var(--line);
  padding-top: 26px;
}
.hero-meta div {
  padding-right: 42px;
  margin-right: 42px;
  border-right: 1px solid var(--line);
}
.hero-meta div:last-child { border-right: 0; margin-right: 0; padding-right: 0; }
.hero-meta dt {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin-bottom: 5px;
}
.hero-meta dd { margin: 0; font-size: 14.5px; font-weight: 500; color: var(--ink); }

/* 页面内页头部 */
.page-head {
  padding: 78px 0 62px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--soft-2), #fff);
}
.page-head h1 { font-size: clamp(32px, 4.2vw, 52px); margin-bottom: 20px; }
.page-head p { max-width: 680px; font-size: 17px; margin: 0; }

/* ---------- 双站分流卡 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.split-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 40px 38px 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.split-card:hover {
  border-color: #cfcfc8;
  transform: translateY(-3px);
  box-shadow: 0 18px 40px -22px rgba(16, 20, 24, 0.28);
}
.split-card--here { background: var(--ink); border-color: var(--ink); color: #fff; }
.split-card--here:hover { border-color: var(--ink); box-shadow: 0 18px 40px -22px rgba(16, 20, 24, 0.5); }
.split-card .kicker {
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin-bottom: 18px;
}
.split-card h3 { font-size: 23px; margin-bottom: 14px; letter-spacing: -0.015em; }
.split-card ul { margin: 0 0 30px; padding: 0; list-style: none; }
.split-card li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  color: var(--ink-2);
  margin-bottom: 9px;
}
.split-card li::before {
  content: "";
  position: absolute;
  left: 0; top: 12px;
  width: 5px; height: 1px;
  background: var(--gold-2);
}
.split-card .foot { margin-top: auto; }
.split-card--here .kicker { color: rgba(255, 255, 255, 0.45); }
.split-card--here h3 { color: #fff; }
.split-card--here li { color: rgba(255, 255, 255, 0.72); }
.split-card--here li::before { background: var(--gold-2); }
.split-card--here .btn--primary { background: #fff; color: var(--ink); }
.split-card--here .btn--primary:hover { background: #f1f1ee; }

/* ---------- 数据条 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.stats div {
  padding: 34px 26px 32px 0;
  border-right: 1px solid var(--line);
}
.stats div:last-child { border-right: 0; }
.stats b {
  display: block;
  font-size: clamp(30px, 3.4vw, 42px);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.stats b span { font-size: 0.5em; font-weight: 400; margin-left: 4px; color: var(--ink-3); }
.stats p { margin: 12px 0 0; font-size: 13px; color: var(--ink-3); line-height: 1.6; }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.cell {
  background: #fff;
  padding: 34px 30px 32px;
  transition: background 0.25s var(--ease);
}
.cell:hover { background: var(--soft-2); }
.cell .num {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gold);
  font-weight: 600;
  display: block;
  margin-bottom: 16px;
}
.cell h3 { margin-bottom: 10px; }
.cell p { font-size: 14px; line-height: 1.75; color: var(--ink-3); margin: 0; }
.cell .tags { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 3px;
  background: var(--soft);
  border: 1px solid var(--line);
  font-size: 11.5px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}

/* ---------- 产品条目 ---------- */
.prod { border-top: 1px solid var(--line); padding: 46px 0; }
.prod:first-of-type { border-top: 0; padding-top: 4px; }
.prod-head { display: grid; grid-template-columns: 56px 1fr; gap: 18px; align-items: start; margin-bottom: 22px; }
.prod-head .p-id {
  font-size: 12px; font-weight: 600; letter-spacing: 0.12em;
  color: var(--gold); padding-top: 8px;
}
.prod-head h3 { font-size: 24px; margin: 0 0 9px; letter-spacing: -0.02em; }
.prod-claim { font-size: 15.5px; line-height: 1.7; color: var(--ink-3); margin: 0; }
.prod-body { padding-left: 74px; }
.prod-body > p { font-size: 15px; line-height: 1.85; color: var(--ink-2); margin-bottom: 24px; }
.prod-list {
  list-style: none; padding: 0; margin: 0 0 26px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 11px 36px;
}
.prod-list li {
  position: relative; padding-left: 17px;
  font-size: 14px; line-height: 1.72; color: var(--ink-2);
}
.prod-list li::before {
  content: ""; position: absolute; left: 0; top: 0.66em;
  width: 5px; height: 5px; border-radius: 50%; background: var(--gold-2);
}
.prod-meta {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1px; background: var(--line); border: 1px solid var(--line);
  border-radius: 6px; overflow: hidden; margin: 0;
}
.prod-meta div { background: #fff; padding: 16px 18px; }
.prod-meta dt {
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--ink-4); margin-bottom: 6px;
}
.prod-meta dd { margin: 0; font-size: 13.5px; line-height: 1.6; color: var(--ink); }

/* ---------- 首页产品线条带 ---------- */
.product-band { background: var(--ink); color: #fff; padding: 88px 0; }
.product-band .sec-head h2 { color: #fff; }
.product-band .sec-head p { color: rgba(255, 255, 255, 0.66); }
.product-band .eyebrow { color: var(--gold-2); }
.pb-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: rgba(255, 255, 255, 0.13);
  margin-top: 48px; border-top: 1px solid rgba(255, 255, 255, 0.13);
}
.pb-item { background: var(--ink); padding: 30px 24px 36px; display: flex; flex-direction: column; }
.pb-item .k { font-size: 10.5px; letter-spacing: 0.14em; color: var(--gold-2); font-weight: 600; }
.pb-item h3 { color: #fff; font-size: 17.5px; margin: 14px 0 10px; }
.pb-item p { color: rgba(255, 255, 255, 0.62); font-size: 13.5px; line-height: 1.78; margin: 0 0 18px; flex: 1; }
.pb-item a {
  align-self: flex-start;
  font-size: 12.5px; color: #fff; letter-spacing: 0.02em;
  border-bottom: 1px solid rgba(255, 255, 255, 0.35); padding-bottom: 2px;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.pb-item a:hover { color: var(--gold-2); border-color: var(--gold-2); }

/* ---------- 品牌标识卡 ---------- */
.brand-card {
  display: grid; grid-template-columns: 300px 1fr; gap: 42px; align-items: center;
  border: 1px solid var(--line); border-radius: 8px;
  padding: 38px 40px; background: #fff;
}
.brand-card > img { width: 100%; height: auto; }
.brand-facts { margin: 0; display: grid; gap: 11px; }
.brand-facts div { display: flex; gap: 14px; align-items: baseline; }
.brand-facts dt {
  flex-shrink: 0; width: 72px;
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-4);
}
.brand-facts dd { margin: 0; font-size: 14px; color: var(--ink); display: flex; align-items: center; flex-wrap: wrap; }
.swatch {
  display: inline-block; width: 11px; height: 11px; border-radius: 3px;
  margin-right: 6px; margin-left: 12px; vertical-align: -1px;
}
.swatch:first-child { margin-left: 0; }

/* ---------- 信息表 ---------- */
.info-table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.info-table th, .info-table td {
  text-align: left;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-2);
  vertical-align: top;
}
.info-table th {
  width: 190px;
  font-weight: 400;
  color: var(--ink-3);
  font-size: 13.5px;
  padding-right: 24px;
}
.info-table td { color: var(--ink); }
.info-table tr:last-child th, .info-table tr:last-child td { border-bottom: 0; }
.info-table--boxed { border: 1px solid var(--line); border-radius: var(--radius); border-collapse: separate; border-spacing: 0; }
.info-table--boxed th:first-child,
.info-table--boxed td:first-child { padding-left: 28px; }
.info-table--boxed th:last-child,
.info-table--boxed td:last-child { padding-right: 28px; }
.info-table--boxed tr:first-child th,
.info-table--boxed tr:first-child td { padding-top: 20px; }
.info-table--boxed tr:last-child th,
.info-table--boxed tr:last-child td { padding-bottom: 20px; }
.info-table--boxed th { width: 200px; }

/* ---------- 时间线 ---------- */
.timeline { position: relative; padding-left: 0; }
.timeline-item {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 32px;
  padding: 26px 0;
  border-top: 1px solid var(--line-2);
}
.timeline-item:first-child { border-top: 1px solid var(--line); }
.timeline-item .year {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--gold);
  padding-top: 3px;
  font-variant-numeric: tabular-nums;
}
.timeline-item h3 { margin-bottom: 6px; font-size: 16px; }
.timeline-item p { margin: 0; font-size: 14px; color: var(--ink-3); line-height: 1.7; }

/* ---------- 合作 / 客户 logo 墙 ---------- */
.logo-wall {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.logo-wall div {
  background: #fff;
  min-height: 100px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-2);
  letter-spacing: 0.02em;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}
.logo-wall div:hover { background: var(--soft-2); color: var(--ink); }
.logo-wall div small {
  display: block;
  font-size: 11px;
  font-weight: 400;
  color: var(--ink-4);
  margin-top: 5px;
  letter-spacing: 0.04em;
}

/* ---------- 案例卡 ---------- */
.case {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 44px 0;
  border-top: 1px solid var(--line);
}
.case:first-of-type { border-top: 1px solid var(--line); }
.case-body h3 { font-size: 24px; margin: 14px 0 14px; letter-spacing: -0.015em; }
.case-body p { font-size: 14.8px; margin-bottom: 18px; }
.case-visual {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  background: var(--soft);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
}
.case-visual::before {
  content: "";
  position: absolute; inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 34px 34px;
  opacity: 0.55;
}
.case-visual span {
  position: relative;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-4);
  background: #fff;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 3px;
}

/* 纯 CSS 界面骨架：替代占位图，示意系统形态 */
.ui-mock {
  position: relative;
  width: 80%;
  aspect-ratio: 16 / 10;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 7px;
  box-shadow: 0 22px 44px -28px rgba(16, 20, 24, 0.3);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.ui-bar {
  height: 24px;
  flex-shrink: 0;
  background: var(--soft-2);
  border-bottom: 1px solid var(--line-2);
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 0 12px;
}
.ui-bar i { width: 5px; height: 5px; border-radius: 50%; background: #dcdcd5; }
.ui-bar i:first-child { background: var(--gold-2); }
.ui-body { flex: 1; display: flex; min-height: 0; }
.ui-side {
  width: 27%;
  border-right: 1px solid var(--line-2);
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.ui-side span { display: block; height: 5px; border-radius: 3px; background: #efefea; }
.ui-side span:nth-child(1) { width: 70%; background: #e3e3dc; }
.ui-side span:nth-child(3) { width: 85%; }
.ui-side span:nth-child(4) { width: 55%; }
.ui-main { flex: 1; padding: 14px; display: flex; flex-direction: column; gap: 10px; }
.ui-row { display: flex; gap: 9px; }
.ui-row b { flex: 1; height: 34px; border-radius: 4px; background: var(--soft); border: 1px solid var(--line-2); }
.ui-row b:first-child { background: #f3ede2; border-color: #ece2ce; }
.ui-block { flex: 1; border-radius: 4px; background: linear-gradient(180deg, #fafaf8, #f5f5f1); border: 1px solid var(--line-2); position: relative; overflow: hidden; }
.ui-block::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px; bottom: 10px;
  height: 40%;
  background: linear-gradient(90deg, #e9e9e2 0%, #e9e9e2 18%, transparent 18%, transparent 26%, #e9e9e2 26%, #e9e9e2 48%, transparent 48%, transparent 56%, #e9e9e2 56%, #e9e9e2 72%, transparent 72%, transparent 80%, #e9e9e2 80%, #e9e9e2 100%);
  background-size: 100% 100%;
  opacity: 0.9;
  transform: skewY(-2deg);
  transform-origin: bottom left;
}

/* ---------- 侧栏布局（关于页等） ---------- */
.cols { display: grid; grid-template-columns: 240px 1fr; gap: 64px; align-items: start; }
.cols .side h2 { font-size: 12.5px; font-weight: 600; line-height: 1.5; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 14px; }
.cols .side p { font-size: 13.5px; color: var(--ink-3); line-height: 1.8; }

/* ---------- CTA 区块 ---------- */
.cta-band {
  background: var(--ink);
  color: #fff;
  padding: 84px 0;
  position: relative;
  overflow: hidden;
}
.cta-band::after {
  content: "";
  position: absolute;
  right: -140px; bottom: -220px;
  width: 520px; height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201, 164, 104, 0.16), rgba(201, 164, 104, 0) 70%);
}
.cta-band .wrap { position: relative; z-index: 1; display: flex; align-items: flex-end; justify-content: space-between; gap: 48px; flex-wrap: wrap; }
.cta-band h2 { color: #fff; max-width: 560px; }
.cta-band p { color: rgba(255, 255, 255, 0.6); margin: 18px 0 0; max-width: 560px; font-size: 15.5px; }
.cta-band .btn--primary { background: #fff; color: var(--ink); }
.cta-band .btn--primary:hover { background: #efefec; }
.cta-band .btn--ghost { color: #fff; border-color: rgba(255, 255, 255, 0.28); }
.cta-band .btn--ghost:hover { border-color: #fff; }

/* ---------- 招投标资料清单 ---------- */
.doc-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.doc-list li {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-2);
}
.doc-list li .d-main b { display: block; font-size: 15px; font-weight: 500; margin-bottom: 3px; }
.doc-list li .d-main span { font-size: 13px; color: var(--ink-3); }
.doc-list li .d-state {
  flex-shrink: 0;
  font-size: 11.5px;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--ink-3);
  background: var(--soft);
  letter-spacing: 0.02em;
  margin-top: 2px;
}
.doc-list li .d-state--ok { color: #2f7d5b; border-color: #cfe4d9; background: #f2f9f5; }
.doc-list li .d-state--todo { color: #a86a1f; border-color: #f0e0c8; background: #fdf8ef; }

/* ---------- 流程步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--line); }
.step { padding: 32px 28px 8px 0; position: relative; }
.step::before {
  content: "";
  position: absolute; top: -1px; left: 0;
  width: 0; height: 1px;
  background: var(--gold);
  transition: width 0.5s var(--ease);
}
.step:hover::before { width: 100%; }
.step .s-num {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
  font-weight: 600;
  display: block;
  margin-bottom: 16px;
}
.step h3 { font-size: 16px; margin-bottom: 8px; }
.step p { font-size: 13.5px; color: var(--ink-3); line-height: 1.7; margin: 0; }

/* ---------- 表单 ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 13px; color: var(--ink-2); font-weight: 500; }
.field label i { color: var(--gold); font-style: normal; margin-left: 3px; }
.field input, .field textarea, .field select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px 14px;
  font-size: 14.5px;
  font-family: inherit;
  color: var(--ink);
  background: #fff;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  appearance: none;
}
.field textarea { min-height: 118px; resize: vertical; line-height: 1.7; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(16, 20, 24, 0.06);
}
.field input::placeholder, .field textarea::placeholder { color: #b9bfc7; }

/* ---------- 联系卡片 ---------- */
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.contact-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px;
  background: #fff;
}
.contact-card .k { font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--gold); margin-bottom: 14px; display: block; }
.contact-card h3 { font-size: 17px; margin-bottom: 10px; }
.contact-card p { font-size: 13.8px; color: var(--ink-3); margin: 0 0 16px; line-height: 1.75; }
.contact-card .val { font-size: 15px; font-weight: 500; color: var(--ink); letter-spacing: 0.01em; }
.contact-card .val a:hover { color: var(--gold); }

/* ---------- 招聘 ---------- */
.job {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: center;
  padding: 28px 0;
  border-bottom: 1px solid var(--line-2);
}
.job:first-of-type { border-top: 1px solid var(--line); }
.job h3 { font-size: 18px; margin-bottom: 8px; }
.job .meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.job p { margin: 0; font-size: 14px; color: var(--ink-3); }

/* ---------- FAQ ---------- */
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line-2); }
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 22px 40px 22px 0;
  font-size: 16px;
  font-weight: 500;
  position: relative;
  transition: color 0.2s var(--ease);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 4px; top: 20px;
  font-size: 20px;
  font-weight: 300;
  color: var(--ink-3);
  transition: transform 0.25s var(--ease);
}
.faq details[open] summary::after { content: "−"; }
.faq details p { padding: 0 60px 24px 0; margin: 0; font-size: 14.5px; color: var(--ink-3); line-height: 1.85; }

/* ---------- 页脚 ---------- */
.footer { background: var(--soft); border-top: 1px solid var(--line); padding: 64px 0 34px; }
.footer-top {
  display: grid;
  grid-template-columns: 1.35fr 0.95fr 0.95fr 1.35fr;
  gap: 48px;
  padding-bottom: 44px;
  border-bottom: 1px solid var(--line);
}
.footer h2 {
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin: 0 0 16px;
  font-weight: 600;
}
.footer ul { list-style: none; margin: 0; padding: 0; }
.footer li { margin-bottom: 9px; }
.footer li a { font-size: 13.8px; color: var(--ink-2); transition: color 0.2s var(--ease); }
.footer li a:hover { color: var(--gold); }
.footer-brand p { font-size: 13.5px; color: var(--ink-3); line-height: 1.8; margin: 16px 0 0; max-width: 300px; }
.footer-bottom {
  padding-top: 26px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 12.5px;
  color: var(--ink-4);
  line-height: 1.9;
}
.footer-bottom a { color: var(--ink-3); }
.footer-bottom a:hover { color: var(--gold); }
.footer-legal { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }

/* ---------- 入场动效 ----------
   仅首屏做一次性 CSS 动画（自动完成，不依赖脚本观察器）。
   列表区块始终直接可见，保证任何渲染环境下内容都可读。 */
@keyframes riseIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: no-preference) {
  html.js .hero-inner > * { animation: riseIn 0.75s var(--ease) both; }
  html.js .hero-inner > *:nth-child(1) { animation-delay: 0.02s; }
  html.js .hero-inner > *:nth-child(2) { animation-delay: 0.08s; }
  html.js .hero-inner > *:nth-child(3) { animation-delay: 0.16s; }
  html.js .hero-inner > *:nth-child(4) { animation-delay: 0.24s; }
  html.js .hero-inner > *:nth-child(5) { animation-delay: 0.30s; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-top { grid-template-columns: 1fr 1fr; gap: 36px; }
  .cols { grid-template-columns: 1fr; gap: 36px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 1040px) and (min-width: 881px) {
  .menu a { padding: 8px 9px; font-size: 13.5px; }
  .menu a.active::after { left: 9px; right: 9px; }
  .nav-cta { padding-left: 12px; padding-right: 12px; font-size: 13px; }
}

@media (max-width: 880px) {
  .menu, .nav-cta { display: none; }
  .burger { display: flex; }
  .section { padding: 72px 0; }
  .hero { padding: 60px 0 64px; }
  .split { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stats div { padding: 26px 20px 24px 0; }
  .stats div:nth-child(2n) { border-right: 0; }
  .stats div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .case { grid-template-columns: 1fr; gap: 26px; }
  .case-visual { order: -1; }
  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .pb-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-band .wrap { flex-direction: column; align-items: flex-start; }
  .hero-meta div { padding-right: 24px; margin-right: 24px; }
  .page-head { padding: 52px 0 44px; }
}

@media (max-width: 640px) {
  .wrap { padding: 0 20px; }
  body { font-size: 15.5px; }
  .prod-head { grid-template-columns: 1fr; gap: 6px; margin-bottom: 18px; }
  .prod-head .p-id { padding-top: 0; }
  .prod-head h3 { font-size: 21px; }
  .prod-body { padding-left: 0; }
  .prod-list { grid-template-columns: 1fr; }
  .prod-meta { grid-template-columns: 1fr; }
  .brand-card { grid-template-columns: 1fr; gap: 26px; padding: 26px 22px; }
  .pb-grid { grid-template-columns: 1fr; }
  .product-band { padding: 60px 0; }
  .grid--3, .grid--2 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .timeline-item { grid-template-columns: 1fr; gap: 6px; padding: 22px 0; }
  .footer-top { grid-template-columns: 1fr; gap: 30px; }
  .info-table th { width: 112px; font-size: 13px; padding-right: 14px; }
  .info-table--boxed { padding: 4px 18px; }
  .hero-meta { gap: 18px; flex-direction: column; }
  .hero-meta div { border-right: 0; padding-right: 0; margin-right: 0; }
  .split-card { padding: 30px 24px 26px; }
  .cell { padding: 28px 24px 26px; }
  .doc-list li { flex-direction: column; gap: 8px; }
  .job { grid-template-columns: 1fr; gap: 16px; }
  .footer-bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ==========================================================================
   v5 · 整幅分区版式
   参考 tencent.com 的布局语汇：全幅首屏、居中大字陈述、整块分区、
   数字先行、极宽留白、发丝分隔线。组件全部使用独立类名，不影响旧页面。
   ========================================================================== */

:root {
  --deep: #090c0f;
  --deep-2: #12171d;
  --band: 152px;
}

/* ---------- 全幅深色首屏 ---------- */
.hero-full {
  position: relative;
  background: var(--deep);
  color: #fff;
  padding: 132px 0 0;
  overflow: hidden;
  isolation: isolate;
}
.hero-full::before {
  content: "";
  position: absolute; inset: 0; z-index: -2;
  background:
    radial-gradient(820px 460px at 80% -6%, rgba(42, 97, 179, 0.30), transparent 64%),
    radial-gradient(680px 460px at 6% 104%, rgba(237, 144, 41, 0.13), transparent 66%);
}
.hero-full::after {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.042) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.042) 1px, transparent 1px);
  background-size: 104px 104px;
  -webkit-mask-image: radial-gradient(circle at 50% 34%, #000 12%, transparent 76%);
  mask-image: radial-gradient(circle at 50% 34%, #000 12%, transparent 76%);
}
.hero-full .wrap { max-width: 1120px; }
.hero-center { text-align: center; padding-bottom: 84px; }
.hero-chip {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: 30px;
  padding: 0 15px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.05);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.78);
  text-transform: uppercase;
}
.hero-chip i {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--gold-2);
  box-shadow: 0 0 0 3px rgba(201, 164, 104, 0.18);
}
.hero-full h1 {
  margin: 34px auto 0;
  max-width: 15em;
  font-size: clamp(36px, 4.9vw, 68px);
  line-height: 1.16;
  letter-spacing: -0.022em;
  font-weight: 600;
}
.hero-full .lead {
  margin: 30px auto 0;
  max-width: 640px;
  font-size: 17px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.64);
}
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 40px;
}
.hero-full .btn--primary { background: #fff; color: var(--ink); border-color: #fff; }
.hero-full .btn--primary:hover { background: rgba(255, 255, 255, 0.88); border-color: rgba(255, 255, 255, 0.88); }
.hero-full .btn--ghost {
  color: rgba(255, 255, 255, 0.86);
  border-color: rgba(255, 255, 255, 0.26);
  background: transparent;
}
.hero-full .btn--ghost:hover { color: #fff; border-color: rgba(255, 255, 255, 0.55); background: rgba(255, 255, 255, 0.05); }

/* 首屏底部横向主体信息条 */
.hero-strip {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
}
.hero-strip div {
  padding: 26px 26px 30px 0;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
}
.hero-strip div:last-child { border-right: 0; }
.hero-strip dt {
  font-size: 11px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.42);
  margin-bottom: 9px;
}
.hero-strip dd {
  margin: 0;
  font-size: 14.5px;
  color: rgba(255, 255, 255, 0.94);
  letter-spacing: 0.01em;
}

/* ---------- 分区骨架 ---------- */
.band { padding: var(--band) 0; }
.band--soft { background: var(--soft-2); }
.band--wide { padding: 176px 0; }
.band--deep { background: var(--deep); color: #fff; }
.band--deep .statement h2 { color: #fff; }
.band--deep .statement p { color: rgba(255, 255, 255, 0.6); }

/* 居中大字陈述（腾讯式段首） */
.statement { max-width: 880px; margin: 0 auto 82px; text-align: center; }
.statement .eyebrow { justify-content: center; }
.statement h2 {
  margin: 0;
  font-size: clamp(28px, 3.1vw, 44px);
  line-height: 1.32;
  letter-spacing: -0.015em;
  font-weight: 600;
}
.statement p {
  margin: 24px auto 0;
  max-width: 660px;
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--ink-3);
}

/* ---------- 双站分流：左右整块 ---------- */
.dual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}
.dual-card {
  background: #fff;
  padding: 56px 48px 46px;
  display: flex;
  flex-direction: column;
  min-height: 400px;
  transition: background 0.3s var(--ease);
}
.dual-card:hover { background: var(--soft-2); }
.dual-card--dark {
  background: var(--deep-2);
  color: #fff;
}
.dual-card--dark:hover { background: #171d24; }
.dual-card .kicker {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 600;
}
.dual-card--dark .kicker { color: var(--gold-2); }
.dual-card h3 {
  margin: 20px 0 0;
  font-size: clamp(22px, 2.1vw, 28px);
  line-height: 1.42;
  letter-spacing: -0.01em;
  font-weight: 600;
}
.dual-card ul {
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  flex: 1;
}
.dual-card li {
  position: relative;
  padding: 13px 0 13px 20px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink-2);
  border-top: 1px solid var(--line-2);
}
.dual-card li:first-child { border-top: 0; }
.dual-card li::before {
  content: "";
  position: absolute; left: 0; top: 21px;
  width: 6px; height: 6px;
  border-radius: 50%;
  border: 1px solid var(--gold);
}
.dual-card--dark li { color: rgba(255, 255, 255, 0.66); border-color: rgba(255, 255, 255, 0.08); }
.dual-card--dark li::before { border-color: var(--gold-2); }
.dual-card .foot { margin-top: 34px; }
.dual-card--dark .btn--ghost {
  color: rgba(255, 255, 255, 0.92);
  border-color: rgba(255, 255, 255, 0.34);
}
.dual-card--dark .btn--ghost:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.72);
  background: rgba(255, 255, 255, 0.06);
}

/* ---------- 数字先行 ---------- */
.figures {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
}
.figures div {
  padding: 44px 40px 44px 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.figures div:nth-child(3n) { border-right: 0; }
.figures b {
  display: block;
  font-size: clamp(40px, 4.4vw, 60px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.figures b span { font-size: 0.42em; font-weight: 500; color: var(--ink-3); margin-left: 5px; letter-spacing: 0; }
.figures p {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-3);
}

/* ---------- 能力清单（发丝行） ---------- */
.rows { border-top: 1px solid var(--line); }
.row {
  display: grid;
  grid-template-columns: 76px 1fr 1.35fr 210px;
  gap: 32px;
  align-items: start;
  padding: 40px 8px 38px;
  border-bottom: 1px solid var(--line);
  transition: background 0.28s var(--ease), padding-left 0.28s var(--ease);
}
.row:hover { background: var(--soft-2); padding-left: 22px; }
.row .idx {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-4);
  padding-top: 6px;
}
.row h3 {
  margin: 0;
  font-size: 21px;
  line-height: 1.5;
  letter-spacing: -0.008em;
  font-weight: 600;
}
.row p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-3);
}
.row .tags { display: flex; flex-wrap: wrap; gap: 7px; justify-content: flex-end; }

/* ---------- 产品线整块 ---------- */
.slabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.12);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}
.slab {
  background: var(--deep);
  padding: 52px 30px 44px;
  display: flex;
  flex-direction: column;
  min-height: 330px;
  transition: background 0.3s var(--ease);
}
.slab:hover { background: var(--deep-2); }
.slab .k { font-size: 10.5px; letter-spacing: 0.16em; color: var(--gold-2); font-weight: 600; }
.slab h3 { color: #fff; font-size: 22px; margin: 22px 0 14px; letter-spacing: -0.01em; }
.slab p {
  color: rgba(255, 255, 255, 0.55);
  font-size: 13.5px;
  line-height: 1.85;
  margin: 0 0 26px;
  flex: 1;
}
.slab a {
  align-self: flex-start;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  padding-bottom: 3px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.slab a:hover { color: var(--gold-2); border-color: var(--gold-2); }

/* ---------- 三列方式卡 ---------- */
.trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.trio > div { background: #fff; padding: 44px 36px 42px; }
.trio .k { font-size: 11px; letter-spacing: 0.15em; text-transform: uppercase; color: var(--gold); font-weight: 600; }
.trio h3 { margin: 18px 0 12px; font-size: 20px; letter-spacing: -0.01em; }
.trio p { margin: 0; font-size: 14.5px; line-height: 1.85; color: var(--ink-3); }

/* ---------- 客户墙 ---------- */
.clients {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
}
.clients div {
  min-height: 118px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  padding: 26px 24px 26px 0;
  border-bottom: 1px solid var(--line);
  border-right: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
  letter-spacing: 0.005em;
}
.clients div:nth-child(3n) { border-right: 0; }
.clients small {
  font-size: 11.5px;
  color: var(--ink-4);
  letter-spacing: 0.04em;
}

/* ---------- 内页页头（与首页同一视觉家族） ---------- */
.page-head {
  position: relative;
  padding: 112px 0 84px;
  background: var(--deep);
  color: #fff;
  border-bottom: 0;
  overflow: hidden;
  isolation: isolate;
}
.page-head::before {
  content: "";
  position: absolute; inset: 0; z-index: -2;
  background:
    radial-gradient(760px 420px at 84% -10%, rgba(42, 97, 179, 0.26), transparent 64%),
    radial-gradient(620px 420px at 4% 108%, rgba(237, 144, 41, 0.10), transparent 66%);
}
.page-head::after {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 104px 104px;
  -webkit-mask-image: radial-gradient(circle at 30% 40%, #000 10%, transparent 72%);
  mask-image: radial-gradient(circle at 30% 40%, #000 10%, transparent 72%);
}
.page-head .eyebrow { color: var(--gold-2); }
.page-head .eyebrow::before { background: rgba(201, 164, 104, 0.6); }
.page-head h1 {
  font-size: clamp(32px, 4vw, 54px);
  line-height: 1.22;
  letter-spacing: -0.02em;
  font-weight: 600;
  margin: 0 0 22px;
  color: #fff;
}
.page-head p {
  max-width: 660px;
  font-size: 16.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.64);
  margin: 0;
}

/* ---------- 联系通道（大卡） ---------- */
.routes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.routes > div {
  background: #fff;
  padding: 46px 38px 42px;
  display: flex;
  flex-direction: column;
  min-height: 330px;
  transition: background 0.28s var(--ease);
}
.routes > div:hover { background: var(--soft-2); }
.routes .k { font-size: 11px; letter-spacing: 0.15em; text-transform: uppercase; color: var(--gold); font-weight: 600; }
.routes h3 { margin: 20px 0 14px; font-size: 22px; line-height: 1.45; letter-spacing: -0.01em; }
.routes p { margin: 0 0 28px; font-size: 14.5px; line-height: 1.85; color: var(--ink-3); flex: 1; }
.routes .val { font-size: 21px; font-weight: 600; letter-spacing: -0.01em; }
.routes .val a:hover { color: var(--gold); }
.routes .sub { margin-top: 10px; font-size: 13.5px; color: var(--ink-3); }

/* ---------- 地址双写 ---------- */
.addr-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; }
.addr {
  border-top: 1px solid var(--ink);
  padding-top: 26px;
}
.addr .k { font-size: 11px; letter-spacing: 0.15em; text-transform: uppercase; color: var(--gold); font-weight: 600; }
.addr h3 { margin: 14px 0 12px; font-size: 19px; }
.addr p { margin: 0; font-size: 15px; line-height: 1.95; color: var(--ink-2); }
.addr .note { margin-top: 12px; font-size: 13px; color: var(--ink-4); line-height: 1.8; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  :root { --band: 116px; }
  .band--wide { padding: 124px 0; }
  .row { grid-template-columns: 60px 1fr 1.2fr; gap: 24px; }
  .row .tags { grid-column: 2 / -1; justify-content: flex-start; margin-top: 4px; }
  .figures { grid-template-columns: repeat(2, 1fr); }
  .figures div:nth-child(3n) { border-right: 1px solid var(--line); }
  .figures div:nth-child(2n) { border-right: 0; }
  .slabs { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 880px) {
  .hero-full { padding-top: 88px; }
  .hero-strip { grid-template-columns: repeat(2, 1fr); }
  .hero-strip div { padding: 22px 20px 24px 0; }
  .hero-strip div:nth-child(2n) { border-right: 0; }
  .hero-strip div:last-child { grid-column: 1 / -1; border-right: 0; border-top: 1px solid rgba(255,255,255,0.08); }
  .dual, .trio, .routes, .addr-grid { grid-template-columns: 1fr; }
  .dual-card, .routes > div { min-height: 0; padding: 40px 30px 36px; }
  .dual-card .foot { margin-top: 26px; }
  .statement { margin-bottom: 56px; }
  .row { grid-template-columns: 1fr; gap: 12px; padding: 30px 4px 28px; }
  .row .idx { padding-top: 0; }
  .row:hover { padding-left: 4px; }
  .slabs { grid-template-columns: 1fr; }
  .slab { min-height: 0; padding: 38px 26px 34px; }
}

@media (max-width: 640px) {
  :root { --band: 84px; }
  .hero-full { padding-top: 64px; }
  .hero-center { padding-bottom: 56px; }
  .hero-full h1 { font-size: 32px; }
  .hero-full .lead { font-size: 15.5px; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .figures { grid-template-columns: 1fr; }
  .figures div { border-right: 0 !important; padding: 30px 0; }
  .clients { grid-template-columns: 1fr; }
  .clients div { border-right: 0 !important; min-height: 0; padding: 20px 0; }
  .trio > div, .routes > div { padding: 32px 24px 30px; }
}

/* 打印：便于投标资料打印 */
@media print {
  .topbar, .nav, .drawer, .cta-band .btn-row, .footer { display: none; }
  body { font-size: 12pt; }
  .section { padding: 24px 0; }
}