/* ==========================================================================
   内蒙古鑫和科技有限公司 · 官网首页
   设计令牌 + 组件样式 + 响应式
   ========================================================================== */

/* ---------- Design Tokens ---------- */
:root {
  /* 主色 —— 与 LOGO 一致：深藏青 #081848 + 亮青蓝 #0088C8 */
  --teal-700: #006A9E;
  --teal-600: #0088C8;   /* 主强调色 */
  --teal-500: #00A3E0;
  --teal-050: #E8F5FB;
  --teal-100: #C9E9F7;
  --teal-200: #9BD5F0;

  --navy-900: #081848;   /* 品牌深色 */
  --navy-800: #0D2E6B;
  --navy-700: #0B2E52;

  /* 蓝色系保留给数据可视化与状态 */
  --blue-600: #0088C8;
  --blue-500: #0088C8;
  --blue-050: #EDF3FE;
  --blue-100: #E8EFFC;
  --blue-200: #9BD5F0;
  --blue-300: #5FB8DF;

  /* 文字 */
  --text-900: #0B1E42;
  --text-700: #4A5A6C;
  --text-600: #6B7686;
  --text-500: #8A94A3;

  /* 表面 */
  --bg: #FFFFFF;
  --bg-soft: #F8FAFC;
  --bg-footer: #FBFCFE;

  /* 描边 */
  --line: #E5EBF2;
  --line-soft: #EFF3F6;
  --line-strong: #DCE5F2;
  --line-divider: #E4EAF2;

  /* 状态 */
  --green: #4FBF55;
  --cyan: #0088C8;

  /* 阴影 */
  --shadow-card: 0 4px 16px -4px rgba(8, 24, 72, 0.07);
  --shadow-panel: 0 6px 20px -5px rgba(8, 24, 72, 0.08);
  --shadow-btn: 0 8px 24px -6px rgba(0, 136, 200, 0.28);
  --shadow-glass: 0 10px 32px -8px rgba(13, 46, 107, 0.22);

  /* 字体 */
  --font-sans: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI",
               "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Geist Mono", "SF Mono", "Roboto Mono", ui-monospace, monospace;

  /* 布局 */
  --container: 1312px;
  --gutter: 64px;
  --radius: 10px;
  --radius-sm: 6px;
  --radius-xs: 4px;

  /* 动效 */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 0.28s;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-700);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p, dl, dd, dt, figure, blockquote { margin: 0; }
button, input, textarea { font: inherit; color: inherit; }

:focus-visible {
  outline: 2px solid var(--teal-600);
  outline-offset: 3px;
  border-radius: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 999;
  padding: 12px 20px;
  background: var(--teal-600);
  color: #fff;
  border-radius: 0 0 var(--radius-sm) 0;
  font-size: 14px;
}
.skip-link:focus { left: 0; }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: 96px; }
.section-services, .section-cases, .section-proof { background: var(--bg-soft); }
.section-process, .section-faq { background: var(--bg); }
.section-contact { background: var(--bg-soft); padding-block: 104px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  line-height: 1;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease),
              transform var(--dur) var(--ease);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn-primary { background: var(--teal-600); color: #fff; box-shadow: var(--shadow-btn); }
.btn-primary:hover { background: #006A9E; }

.btn-ghost { background: #fff; color: #33404F; border-color: #CFE6F4; }
.btn-ghost:hover { border-color: var(--teal-600); color: var(--teal-600); }

.btn-outline { background: #fff; color: var(--teal-600); border-color: var(--teal-200); }
.btn-outline:hover { background: var(--teal-050); border-color: var(--teal-600); }

.btn-sm { height: 38px; padding-inline: 20px; font-size: 14px; }
.btn-lg { height: 50px; padding-inline: 26px; }
.btn-block { width: 100%; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line-soft);
}

.header-inner {
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
  height: 72px;
  display: flex;
  align-items: center;
  gap: 40px;
}

.brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-logo { width: 38px; height: 38px; flex-shrink: 0; }
.brand-text { display: flex; flex-direction: column; gap: 1px; }
.brand-cn { font-size: 17px; font-weight: 700; color: var(--navy-900); letter-spacing: 1.2px; }
.brand-en { font-size: 9px; font-weight: 500; font-family: var(--font-mono); color: var(--text-500); letter-spacing: 1.6px; }

.nav { margin-left: auto; }
.nav-list { display: flex; align-items: center; gap: 34px; }
.nav-list a {
  font-size: 14px;
  color: #4A5A6C;
  transition: color var(--dur) var(--ease);
  position: relative;
  padding-block: 4px;
}
.nav-list a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%; bottom: 0;
  height: 1.5px;
  background: var(--teal-600);
  transition: right var(--dur) var(--ease);
}
.nav-list a:hover { color: var(--teal-600); }
.nav-list a:hover::after { right: 0; }

.header-right { display: flex; align-items: center; gap: 20px; margin-left: auto; }
.nav-list + .header-right { margin-left: 0; }
.header-phone {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: #637082;
  transition: color var(--dur) var(--ease);
}
.header-phone:hover { color: var(--teal-600); }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  padding: 0;
  background: none;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.nav-toggle span {
  display: block;
  width: 18px; height: 1.6px;
  background: var(--text-900);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(5.6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5.6px) rotate(-45deg); }
.nav-cta-mobile { display: none; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

.hero-mesh {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(620px 460px at 8% 6%, rgba(213, 228, 255, 0.85) 0%, rgba(255, 255, 255, 0) 68%),
    radial-gradient(520px 420px at 96% 62%, rgba(222, 241, 249, 0.8) 0%, rgba(255, 255, 255, 0) 70%);
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0 0 auto 0;
  height: 300px;
  pointer-events: none;
  opacity: 0.7;
  background-image:
    linear-gradient(to right, #E8EFF9 1px, transparent 1px),
    linear-gradient(to bottom, #E8EFF9 1px, transparent 1px);
  background-size: 240px 60px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,0.9), rgba(0,0,0,0));
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.9), rgba(0,0,0,0));
}

.hero-inner {
  position: relative;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding: 88px var(--gutter) 92px;
  display: flex;
  align-items: center;
  gap: 68px;
}

.hero-left {
  width: 624px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.eyebrow-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  align-self: flex-start;
  height: 30px;
  padding-inline: 14px;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.4px;
  color: var(--teal-600);
  background: rgba(0, 136, 200, 0.09);
  border: 1px solid var(--teal-200);
  border-radius: var(--radius-xs);
}

.hero-title {
  font-size: 50px;
  font-weight: 700;
  line-height: 68px;
  letter-spacing: -0.6px;
  color: var(--text-900);
  display: flex;
  flex-direction: column;
}
.hero-title-accent {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--teal-600);
}
.hero-title-accent::before {
  content: "";
  width: 4px;
  height: 46px;
  border-radius: 2px;
  background: var(--teal-600);
  flex-shrink: 0;
}

.hero-sub {
  font-size: 16px;
  line-height: 30px;
  color: #4A5A6C;
}

.hero-cta { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }

/* Hero 右侧监控视觉 */
.hero-right { flex: 1; min-width: 0; }

.hero-visual {
  position: relative;
  height: 500px;
  border-radius: var(--radius);
  overflow: hidden;
  background: #0B1220;
  border: 1px solid #D8E2EF;
}
.hero-image { width: 100%; height: 100%; object-fit: cover; }

.hero-scrim {
  position: absolute;
  inset: auto 0 0 0;
  height: 280px;
  background: linear-gradient(to bottom, rgba(5, 8, 15, 0), rgba(5, 8, 15, 0.55));
}

.status-chip {
  position: absolute;
  top: 26px; left: 28px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 30px;
  padding-inline: 12px;
  font-size: 12px;
  color: #212D41;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid #D8E2EF;
  border-radius: var(--radius-xs);
}

.ops-panel {
  position: absolute;
  left: 28px; bottom: 28px;
  width: calc(100% - 56px);
  max-width: 564px;
  padding: 16px 22px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--teal-200);
  border-radius: var(--radius);
  box-shadow: var(--shadow-glass);
  backdrop-filter: blur(26px);
  -webkit-backdrop-filter: blur(26px);
}

.ops-top { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }
.ops-top-label {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.6px;
  color: var(--teal-600);
}
.ops-top-right {
  margin-left: auto;
  font-size: 11px;
  color: #8593A6;
}

.ops-metrics { display: flex; justify-content: space-between; gap: 32px; }
.ops-metric { display: flex; flex-direction: column; gap: 4px; }
.ops-metric dt { font-size: 11.5px; color: #6B7789; white-space: nowrap; }
.ops-metric dd {
  font-family: var(--font-mono);
  font-size: 27px;
  font-weight: 600;
  letter-spacing: -0.5px;
  color: var(--text-900);
}

/* ---------- Section Head ---------- */
.section-head { margin-bottom: 52px; }
.section-head.split-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
}
.section-head-left { max-width: 760px; display: flex; flex-direction: column; gap: 18px; }
.section-head-right { display: flex; flex-direction: column; align-items: flex-end; gap: 8px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 2.4px;
  color: var(--teal-600);
}
.eyebrow-bar { width: 22px; height: 2px; background: var(--teal-600); flex-shrink: 0; }
.eyebrow-light { color: #6FD8A0; letter-spacing: 0.6px; }

.section-title {
  font-size: 40px;
  font-weight: 700;
  line-height: 56px;
  letter-spacing: -0.8px;
  color: var(--text-900);
}
.section-lead {
  font-size: 15.5px;
  line-height: 29px;
  color: #4A5A6C;
}

.stat-big {
  font-family: var(--font-mono);
  font-size: 46px;
  font-weight: 600;
  letter-spacing: -1.5px;
  color: var(--teal-600);
}
.stat-note { font-size: 12.5px; color: #6B7686; }

/* ---------- 企业 AI 板块 ---------- */
.section-ai { background: var(--bg-soft); }

.ai-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: minmax(196px, auto);
  gap: 20px;
}

/* 主卡：占左侧两列两行 */
.ai-card-feature {
  grid-column: span 2;
  grid-row: span 2;
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.ai-card-feature:hover {
  box-shadow: var(--shadow-panel);
  transform: translateY(-2px);
}
.ai-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  flex-shrink: 0;
}
.ai-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px 28px;
}
.ai-kicker {
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 1.8px;
  color: var(--teal-600);
  text-transform: uppercase;
}

/* 普通卡 */
.ai-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}
.ai-card:hover {
  border-color: var(--teal-200);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}
.ai-title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-900);
  line-height: 27px;
}
.ai-desc {
  font-size: 13.5px;
  line-height: 24px;
  color: #4A5A6C;
}

/* 落地路径 */
.ai-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 20px;
  padding-top: 44px;
  border-top: 1px solid var(--line);
}
.ai-step { display: flex; flex-direction: column; gap: 10px; }
.ai-step-num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 600;
  letter-spacing: -1px;
  color: var(--teal-600);
  line-height: 1;
}
.ai-step-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-900);
}
.ai-step-desc {
  font-size: 13.5px;
  line-height: 24px;
  color: #4A5A6C;
}

/* ---------- Bento / Cards ---------- */
.bento { display: flex; flex-direction: column; gap: 20px; }
.bento-row { display: flex; gap: 20px; align-items: stretch; }
.bento-row-a { height: 384px; }
.bento-row-b { height: 300px; }

.bento-row-a .card-feature { flex: 2.1 1 0; }
.bento-row-a .card-icon { flex: 1 1 0; }
.bento-row-b .card-media { flex: 1 1 0; }

.card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}
.card:hover {
  border-color: var(--teal-200);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.card-image { width: 100%; height: 186px; object-fit: cover; flex-shrink: 0; }
.card-media .card-image { height: 132px; }

.card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 28px;
}
.card-media .card-body { padding: 20px 24px; gap: 9px; }

.card-icon { padding: 26px; gap: 14px; justify-content: flex-start; }

.icon-box {
  width: 34px; height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--teal-100);
  border-radius: 7px;
  flex-shrink: 0;
}

.card-title {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-900);
}
.card-title-lg { font-size: 24px; }
.card-desc {
  font-size: 13.5px;
  line-height: 24px;
  color: #4A5A6C;
}
.card-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--teal-600);
  transition: color var(--dur) var(--ease);
}
.card-link:hover { color: #006A9E; text-decoration: underline; }

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  padding-top: 4px;
}
.card-icon .tag-list { margin-top: auto; }
.tag {
  font-size: 11.5px;
  line-height: 1;
  padding: 7px 10px;
  color: #4A5666;
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
  border-radius: 3px;
}

/* ---------- Process Steps ---------- */
.step-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.step-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 28px 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.step-card:hover { border-color: var(--teal-200); box-shadow: var(--shadow-card); }
.step-num {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -1px;
  color: var(--teal-600);
}
.step-title { font-size: 19px; font-weight: 700; color: var(--text-900); }
.step-desc { font-size: 13.5px; line-height: 24px; color: #4A5A6C; }
.step-output {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  padding-top: 4px;
  font-size: 12px;
  color: #6B7686;
}
.step-output-bar { width: 3px; height: 13px; background: var(--green); flex-shrink: 0; }

/* ---------- Cases ---------- */
[hidden] { display: none !important; }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.case-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid #E4EAF2;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.case-card:hover { transform: translateY(-3px); box-shadow: 0 10px 26px -8px rgba(20, 38, 77, 0.12); }
.case-image { width: 100%; height: 210px; object-fit: cover; }
.case-body { flex: 1; display: flex; flex-direction: column; gap: 11px; padding: 24px 26px; }
.case-meta { display: flex; align-items: center; gap: 9px; }
.case-tag {
  font-size: 11.5px;
  line-height: 1;
  padding: 6px 9px;
  color: var(--teal-600);
  background: rgba(0, 136, 200, 0.09);
  border: 1px solid var(--teal-200);
  border-radius: 3px;
}
.case-year,
.case-scope { font-family: var(--font-mono); font-size: 11.5px; color: #8C97A8; }
.case-title { font-size: 18px; font-weight: 700; line-height: 28px; color: var(--text-900); }
.case-desc { font-size: 13.5px; line-height: 24px; color: #4A5A6C; }
.case-result { display: flex; gap: 22px; margin-top: auto; padding-top: 4px; }
.case-result div { display: flex; flex-direction: column; gap: 2px; }
.case-result dd {
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 600;
  color: var(--teal-600);
}
.case-result dt { font-size: 11.5px; color: #6B7686; }

/* 交付范围标签 */
.case-scope-list {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: auto;
  padding-top: 6px;
}
.case-scope-list li {
  font-size: 12px;
  line-height: 1;
  color: var(--text-700);
  background: #F5F8FA;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 6px 10px;
}

/* ---------- 标杆案例 · 横版文字卡 ---------- */
.case-grid-wide { margin-top: 20px; }
.case-card-wide {
  background: #FAFCFD;
  border-color: var(--line);
  box-shadow: none;
}
.case-card-wide:hover {
  border-color: var(--teal-200);
  box-shadow: 0 8px 22px -14px rgba(20, 38, 77, 0.2);
}
.case-card-wide .case-body { padding: 22px 24px; gap: 10px; }
.case-card-wide .case-title { font-size: 17px; line-height: 26px; }
.case-card-wide .case-desc { font-size: 13px; line-height: 23px; }

/* ---------- 客户名录 ---------- */
.client-roster { margin-top: 56px; }
.roster-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
}
.roster-title { font-size: 19px; font-weight: 700; color: var(--text-900); }
.roster-note { font-family: var(--font-mono); font-size: 12.5px; color: #8C97A8; }

/* 行业筛选 */
.roster-filter { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 30px; }
.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: inherit;
  font-size: 13px;
  line-height: 1;
  color: var(--text-700);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 14px;
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.filter-chip:hover { color: var(--teal-600); border-color: var(--teal-200); }
.filter-chip.is-active { color: #fff; background: var(--teal-600); border-color: var(--teal-600); }
.filter-count { font-family: var(--font-mono); font-size: 11.5px; opacity: 0.75; }

/* 行业分组 —— 全部分组共用一个连续网格，分组标题横跨整行 */
.roster-groups {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.roster-group { display: contents; }
.roster-group-title {
  grid-column: 1 / -1;
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 22px 0 2px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-900);
}
.roster-group:first-child .roster-group-title { margin-top: 0; }
.roster-group-name { position: relative; padding-left: 13px; }
.roster-group-name::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 13px;
  border-radius: 2px;
  background: var(--teal-600);
}
.roster-group-count { font-family: var(--font-mono); font-size: 11.5px; font-weight: 400; color: #93A0B2; }
.roster-grid { display: contents; }
.roster-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.roster-item:hover {
  border-color: var(--teal-200);
  box-shadow: 0 6px 18px -10px rgba(20, 38, 77, 0.16);
  transform: translateY(-2px);
}
.roster-top { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.roster-name { font-size: 15px; font-weight: 600; line-height: 22px; color: var(--text-900); }
.roster-sector { font-family: var(--font-mono); font-size: 11px; color: #93A0B2; white-space: nowrap; }
.roster-tags { font-size: 12.5px; line-height: 21px; color: var(--text-700); }

/* ---------- Proof ---------- */
.proof-grid { display: grid; grid-template-columns: 700px 1fr; gap: 20px; align-items: start; }

.stats-col { display: flex; flex-direction: column; gap: 14px; }
.stats-header { display: flex; align-items: baseline; justify-content: space-between; padding-bottom: 2px; }
.stats-header-title { font-size: 13px; font-weight: 500; color: #6B7686; letter-spacing: 0.8px; }
.stats-header-en {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 1.6px;
  color: #99A3B2;
}

.stat-rows { display: flex; flex-direction: column; gap: 14px; }
.stat-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 22px 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.stat-row dd {
  width: 104px;
  font-family: var(--font-mono);
  font-size: 44px;
  font-weight: 600;
  letter-spacing: -1.5px;
  color: var(--teal-600);
  line-height: 1.1;
}
.stat-row dt { font-size: 13.5px; color: #6B7686; text-align: right; }

.quotes-col { display: flex; flex-direction: column; gap: 16px; }
.quote-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 26px 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.quote-mark { width: 26px; height: 20px; }
.quote-card blockquote {
  font-size: 15px;
  line-height: 28px;
  color: #3E4E60;
}
.quote-card figcaption { display: flex; align-items: center; gap: 12px; }
.avatar {
  width: 34px; height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: #081848;
  color: #E6EDF7;
  font-size: 14px;
  font-weight: 500;
  flex-shrink: 0;
}
.quote-meta { display: flex; flex-direction: column; gap: 2px; }
.quote-name { font-size: 13.5px; font-weight: 500; color: var(--text-900); }
.quote-role { font-size: 12px; color: #6B7686; }

/* ---------- FAQ ---------- */
.faq-grid { display: grid; grid-template-columns: 460px 1fr; gap: 64px; align-items: start; }
.faq-left { display: flex; flex-direction: column; gap: 18px; }
.faq-cta {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 14px;
  padding: 26px 28px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.faq-cta .icon-box { width: 30px; height: 30px; }
.faq-cta-title { font-size: 16px; font-weight: 700; color: var(--text-900); }
.faq-cta-desc { font-size: 13.5px; line-height: 24px; color: #4A5A6C; }
.faq-cta .btn { align-self: flex-start; }

.faq-right { display: flex; flex-direction: column; }
.faq-item { border-bottom: 1px solid var(--line-divider); }
.faq-item:first-child { border-top: 1px solid var(--line-divider); }
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 22px;
  cursor: pointer;
  list-style: none;
  font-size: 18px;
  font-weight: 500;
  line-height: 28px;
  color: var(--text-900);
  transition: color var(--dur) var(--ease);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--teal-600); }
.faq-plus { flex-shrink: 0; transition: transform var(--dur) var(--ease); }
.faq-item[open] .faq-plus { transform: rotate(45deg); }
.faq-answer { padding-bottom: 22px; }
.faq-answer p { font-size: 14px; line-height: 27px; color: #4A5A6C; max-width: 620px; }

/* ---------- Contact ---------- */
.contact-panel {
  display: flex;
  align-items: center;
  gap: 56px;
  padding: 56px 60px;
  border-radius: 14px;
  background: linear-gradient(135deg, #E8F5FB 0%, #F8FAFC 100%);
  border: 1px solid var(--teal-200);
}
.contact-left { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 20px; }
.contact-title {
  font-size: 38px;
  font-weight: 700;
  line-height: 54px;
  letter-spacing: -0.8px;
  color: var(--text-900);
}
.contact-desc { font-size: 15px; line-height: 29px; color: #4A5A6C; }

.contact-list { display: flex; flex-wrap: wrap; gap: 34px; margin-top: 4px; }
.contact-list li { display: flex; flex-direction: column; gap: 4px; }
.contact-label { font-size: 12px; color: #6B7686; }
.contact-value {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 600;
  color: var(--text-900);
}
.contact-value[href] { transition: color var(--dur) var(--ease); }
.contact-value[href]:hover { color: var(--teal-600); }

.contact-form {
  width: 480px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  box-shadow: var(--shadow-panel);
}
.form-title { font-size: 18px; font-weight: 700; color: var(--text-900); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.field { display: flex; flex-direction: column; gap: 7px; }
.field-label { font-size: 12.5px; color: #6B7686; }
.field-input {
  width: 100%;
  height: 44px;
  padding-inline: 14px;
  background: #FCFDFF;
  border: 1px solid #D3E7F3;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-900);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.field-input::placeholder { color: #A6B0BF; }
.field-input:hover { border-color: #9BD5F0; }
.field-input:focus {
  outline: none;
  border-color: var(--teal-600);
  box-shadow: 0 0 0 3px rgba(0, 136, 200, 0.12);
}
.field-textarea { height: 84px; padding: 12px 14px; resize: vertical; line-height: 24px; }
.field-input.is-invalid { border-color: #E5484D; }
.field-input.is-invalid:focus { box-shadow: 0 0 0 3px rgba(229, 72, 77, 0.12); }

.field-error {
  font-size: 12px;
  line-height: 1.5;
  color: #E5484D;
  min-height: 0;
  display: none;
}
.field-error.is-visible { display: block; }

.form-note { font-size: 12px; color: #8C97A8; }
.form-status {
  font-size: 13px;
  line-height: 1.6;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  display: none;
}
.form-status.is-visible { display: block; }
.form-status.is-success { background: #ECFDF3; color: #166534; border: 1px solid #BBF7D0; }
.form-status.is-error { background: #FEF2F2; color: #991B1B; border: 1px solid #FECACA; }

.btn.is-loading { opacity: 0.7; pointer-events: none; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-footer);
  border-top: 1px solid #E6EDF2;
}
.footer-top {
  display: flex;
  gap: 64px;
  padding-block: 64px 56px;
}
.footer-brand-col { width: 420px; flex-shrink: 0; display: flex; flex-direction: column; gap: 18px; }
.footer-brand-col .brand-cn { font-size: 15px; letter-spacing: 0.4px; }
.footer-desc { font-size: 13.5px; line-height: 25px; color: #6B7686; max-width: 420px; }

.cert-list { display: flex; flex-wrap: wrap; gap: 8px; }
.cert {
  font-size: 11.5px;
  line-height: 1;
  padding: 7px 10px;
  color: #6B7686;
  background: #fff;
  border: 1px solid #E4EAF2;
  border-radius: 3px;
}
/* 主线业务标签 —— 用品牌色区分于普通资质标签 */
.cert-core {
  background: var(--teal-050);
  border-color: var(--teal-200);
  color: var(--teal-700);
  font-weight: 500;
}

.footer-col { display: flex; flex-direction: column; gap: 14px; }
.footer-col-title { font-size: 13.5px; font-weight: 500; color: var(--text-900); }
.footer-col li { font-size: 13px; color: #616D7E; }
.footer-col a { transition: color var(--dur) var(--ease); }
.footer-col a:hover { color: var(--teal-600); }

.footer-contact-col { flex: 1; min-width: 0; }
.footer-contact { font-size: 13px; color: #616D7E; }
.footer-contact a { font-family: var(--font-mono); transition: color var(--dur) var(--ease); }
.footer-contact a:hover { color: var(--teal-600); }

.footer-chart {
  margin-top: 4px;
  padding: 18px 20px;
  background: #fff;
  border: 1px solid #E4EAF2;
  border-radius: var(--radius-sm);
}
.chart-bars {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 4px;
  height: 64px;
}
.chart-bars span {
  flex: 1;
  min-width: 0;
  border-radius: 2px 2px 0 0;
  background: #D6EDF8;
}
.chart-bars span:nth-child(4n+2) { background: #0088C8; }
.chart-bars span:nth-child(4n+3) { background: #5FB8DF; }
.chart-label {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-top: 10px;
  font-size: 11px;
  color: #808C9E;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-block: 20px 26px;
  border-top: 1px solid #E6EDF2;
}
.copyright { font-size: 12.5px; color: #808C9E; }
.copyright a { color: inherit; transition: color var(--dur) var(--ease); }
.copyright a:hover { color: var(--teal-600); }
.legal-list { display: flex; align-items: center; gap: 22px; }
.legal-list a { font-size: 12.5px; color: #808C9E; transition: color var(--dur) var(--ease); }
.legal-list a:hover { color: var(--teal-600); }

/* ==========================================================================
   Responsive
   ========================================================================== */

/* 大桌面收窄容器 */
@media (max-width: 1440px) {
  :root { --gutter: 48px; }
  .hero-title { font-size: 46px; line-height: 64px; }
  .hero-title-accent::before { height: 42px; }
  .section-title { font-size: 36px; line-height: 50px; }
  .contact-title { font-size: 34px; line-height: 48px; }
}

/* ---------- 企业 AI 响应式 ---------- */
@media (max-width: 1200px) {
  .ai-grid { grid-template-columns: repeat(2, 1fr); grid-auto-rows: auto; }
  .ai-card-feature { grid-column: span 2; grid-row: span 1; }
  .ai-steps { grid-template-columns: repeat(2, 1fr); gap: 28px 20px; }
}

@media (max-width: 900px) {
  .ai-image { height: 200px; }
}

@media (max-width: 600px) {
  .ai-grid { grid-template-columns: 1fr; }
  .ai-card-feature { grid-column: span 1; }
  .ai-steps { grid-template-columns: 1fr; }
  .ai-step-num { font-size: 26px; }
}

@media (max-width: 1200px) {
  :root { --gutter: 32px; }
  .hero-inner { flex-direction: column; align-items: stretch; gap: 44px; }
  .hero-left { width: 100%; }
  .hero-visual { height: 440px; }
  .bento-row { flex-wrap: wrap; height: auto !important; }
  .bento-row-a .card-feature { flex: 1 1 100%; }
  .bento-row-a .card-icon { flex: 1 1 calc(50% - 10px); }
  .bento-row-b .card-media,
  .bento-row-b .card-icon { flex: 1 1 calc(50% - 10px); }
  .card-feature .card-image { height: 240px; }
  .proof-grid { grid-template-columns: 1fr; }
  .faq-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-panel { flex-direction: column; align-items: stretch; gap: 36px; }
  .contact-form { width: 100%; }
  .footer-top { flex-wrap: wrap; gap: 40px; }
  .footer-brand-col { width: 100%; }
  .footer-contact-col { flex-basis: 100%; }
  .roster-groups { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
  :root { --gutter: 24px; }
  .section { padding-block: 64px; }
  .section-contact { padding-block: 72px; }

  .header-inner { height: 64px; gap: 16px; }
  .header-right { display: none; }
  .nav-toggle { display: flex; margin-left: auto; }

  .nav {
    position: fixed;
    inset: 64px 0 auto 0;
    margin: 0;
    padding: 20px var(--gutter) 28px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 28px -12px rgba(20, 38, 77, 0.14);
    display: none;
  }
  .nav.is-open { display: block; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-list li { border-bottom: 1px solid var(--line-soft); }
  .nav-list a { display: block; padding: 14px 0; font-size: 16px; }
  .nav-list a::after { display: none; }
  .nav-cta-mobile { display: block; margin-top: 20px; }
  .nav-cta-mobile .btn { width: 100%; height: 46px; }

  .hero-inner { padding-block: 56px 64px; gap: 36px; }
  .hero-left { gap: 22px; }
  .hero-title { font-size: 36px; line-height: 50px; letter-spacing: -0.4px; }
  .hero-title-accent { font-size: 30px; line-height: 44px; }
  .hero-title-accent::before { height: 36px; }
  .hero-sub { font-size: 15px; line-height: 28px; }
  .br-desktop { display: none; }
  .hero-visual { height: 380px; }
  .ops-panel { left: 16px; bottom: 16px; width: calc(100% - 32px); padding: 14px 18px; }
  .ops-metrics { gap: 16px; }
  .ops-metric dd { font-size: 21px; }
  .ops-metric dt { font-size: 10.5px; }
  .status-chip { top: 16px; left: 16px; }

  .section-head { margin-bottom: 36px; }
  .section-head.split-head { flex-direction: column; align-items: flex-start; gap: 24px; }
  .section-head-right { align-items: flex-start; }
  .section-title { font-size: 28px; line-height: 40px; }
  .section-lead { font-size: 15px; line-height: 28px; }
  .stat-big { font-size: 38px; }

  .bento-row { flex-direction: column; }
  .bento-row-a .card-feature,
  .bento-row-a .card-icon,
  .bento-row-b .card-media,
  .bento-row-b .card-icon { flex: 0 0 auto; width: 100%; }
  .card-feature .card-image { height: 200px; }
  .step-grid { grid-template-columns: 1fr 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .roster-groups { grid-template-columns: repeat(2, 1fr); }
  .stat-row { padding: 18px 20px; }
  .stat-row dd { font-size: 36px; width: 90px; }
  .contact-panel { padding: 32px 28px; }
  .contact-title { font-size: 27px; line-height: 38px; }
  .contact-list { gap: 22px; }
  .footer-top { padding-block: 48px 40px; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 12px; }
}

@media (max-width: 600px) {
  :root { --gutter: 20px; }
  .section { padding-block: 52px; }
  .section-contact { padding-block: 56px; }

  .hero-inner { padding-block: 44px 52px; }
  .hero-title { font-size: 29px; line-height: 42px; }
  .hero-title-accent { font-size: 24px; line-height: 38px; gap: 10px; }
  .hero-title-accent::before { height: 30px; }
  .hero-sub { font-size: 14.5px; line-height: 27px; }
  .eyebrow-badge { font-size: 11.5px; height: 28px; padding-inline: 11px; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { width: 100%; }
  .hero-visual { height: 320px; }
  .ops-metrics { flex-wrap: wrap; gap: 12px 20px; }
  .ops-metric { flex-basis: calc(50% - 10px); }

  .section-title { font-size: 24px; line-height: 35px; }
  .section-lead { font-size: 14.5px; line-height: 27px; }
  .card-body, .card-icon { padding: 20px; }
  .card-title-lg { font-size: 20px; }
  .card-image { height: 168px; }
  .card-media .card-image { height: 120px; }
  .step-grid { grid-template-columns: 1fr; }
  .step-card { padding: 22px 20px; }
  .client-roster { margin-top: 40px; }
  .roster-head { flex-direction: column; align-items: flex-start; gap: 6px; }
  .roster-groups { grid-template-columns: 1fr; gap: 10px; }
  .roster-item { padding: 14px 16px; }
  .stat-row { flex-direction: column; align-items: flex-start; gap: 6px; }
  .stat-row dt { text-align: left; }
  .quote-card { padding: 22px 20px; }
  .quote-card blockquote { font-size: 14.5px; line-height: 27px; }
  .faq-item summary { font-size: 16px; line-height: 25px; }
  .faq-answer p { font-size: 13.5px; line-height: 26px; }
  .contact-panel { padding: 26px 20px; border-radius: 12px; }
  .contact-title { font-size: 23px; line-height: 33px; }
  .contact-desc { font-size: 14px; line-height: 26px; }
  .contact-list { flex-direction: column; gap: 16px; }
  .contact-value { font-size: 16px; }
  .contact-form { padding: 22px 20px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-top { padding-block: 40px 32px; }
  .legal-list { flex-wrap: wrap; gap: 14px 18px; }
}

/* ---------- Motion & Print ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .card:hover, .case-card:hover, .btn:active { transform: none; }
  .reveal { opacity: 1; transform: none; }
}

@media print {
  .site-header, .nav-toggle, .hero-grid, .hero-mesh { display: none !important; }
  .contact-form, .faq-cta { display: none !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
  body { font-size: 12pt; }
  .section { padding-block: 24px; page-break-inside: avoid; }
}