/* ============================================================
   博枢知耀 GEO 官网 — 样式 V2（浅色科技风）
   近白底 × 科技蓝：AI 引擎 + 数据可信感；AI 卡片与页脚深蓝作对比焦点
   ============================================================ */

:root {
  --bg: #F6F8FC;
  --bg-deep: #EDF2F9;
  --surface: #FFFFFF;
  --surface-2: #F1F5FB;
  --border: #D9E2F0;
  --border-soft: #E4EAF4;
  --text: #24344D;
  --text-strong: #0C1626;
  --muted: #5B6E89;
  --muted-2: #8A99B0;
  --accent: #1B6BFF;
  --accent-strong: #3E86FF;
  --accent-deep: #1250D6;
  --accent-soft: rgba(27, 107, 255, 0.08);
  --accent-border: rgba(27, 107, 255, 0.22);
  --green: #16A34A;
  --dark: #0E1B33;
  --dark-2: #0A1424;
  --dark-border: #1D2F4E;
  --radius: 14px;
  --container: 1200px;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --shadow-card: 0 1px 2px rgba(12, 22, 38, 0.04), 0 8px 24px rgba(12, 22, 38, 0.05);
  --shadow-card-hover: 0 2px 4px rgba(12, 22, 38, 0.05), 0 16px 40px rgba(12, 22, 38, 0.09);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-soft);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  flex-shrink: 0;
}

.brand-text strong {
  display: block;
  font-size: 19px;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--text-strong);
  line-height: 1.25;
}

.brand-text small {
  display: block;
  font-size: 11.5px;
  color: var(--muted);
  letter-spacing: 0.14em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.site-nav > a {
  font-size: 15px;
  color: var(--muted);
  transition: color 0.2s var(--ease);
  white-space: nowrap;
}

.site-nav > a:hover,
.site-nav > a.active { color: var(--accent); }

.nav-cta {
  background: var(--accent);
  color: #FFFFFF !important;
  font-weight: 700;
  padding: 9px 18px;
  border-radius: 999px;
  transition: background 0.2s var(--ease);
}

.nav-cta:hover { background: var(--accent-strong); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 42px;
  height: 42px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-strong);
  transition: transform 0.25s var(--ease), opacity 0.2s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 视图切换 ---------- */
.view { display: none; }
.view.active { display: block; }

/* ---------- 通用区块 ---------- */
.section { padding: 96px 0; }
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 48px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.eyebrow-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}

h1, h2, h3 { color: var(--text-strong); line-height: 1.3; font-weight: 700; }
h1 { font-size: 44px; font-weight: 900; letter-spacing: 0.01em; }
h2 { font-size: 32px; font-weight: 900; margin-bottom: 18px; }
h3 { font-size: 18px; margin-bottom: 8px; }

.lead { font-size: 17.5px; color: var(--muted); max-width: 720px; }

.accent { color: var(--accent); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 15.5px;
  font-weight: 700;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.btn-accent {
  background: var(--accent);
  color: #FFFFFF;
  box-shadow: 0 8px 20px rgba(27, 107, 255, 0.22);
}

.btn-accent:hover { background: var(--accent-strong); transform: translateY(-1px); }

.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--surface);
}

.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 110px 0 96px;
  overflow: hidden;
  background:
    radial-gradient(1000px 520px at 88% -10%, rgba(27, 107, 255, 0.10), transparent 62%),
    radial-gradient(760px 420px at -8% 112%, rgba(14, 165, 233, 0.08), transparent 60%),
    linear-gradient(180deg, #FFFFFF 0%, var(--bg) 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(27, 107, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 107, 255, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(700px 430px at 75% 30%, rgba(0,0,0,0.9), transparent 72%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 64px;
  align-items: center;
}

.hero-copy h1 { font-size: 56px; line-height: 1.18; margin-bottom: 24px; }

.hero-sub {
  font-size: 18px;
  color: var(--muted);
  max-width: 540px;
  margin-bottom: 36px;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, auto);
  gap: 28px 48px;
  justify-content: start;
}

.hero-stats div { border-left: 1px solid var(--border); padding-left: 18px; }
.hero-stats dt { font-size: 26px; font-weight: 900; color: var(--text-strong); line-height: 1.25; }
.hero-stats dd { font-size: 13px; color: var(--muted); letter-spacing: 0.03em; margin-top: 2px; }

/* AI 对话卡片（深蓝对比焦点） */
.ai-card {
  background: linear-gradient(160deg, var(--dark), var(--dark-2));
  border: 1px solid var(--dark-border);
  border-radius: 20px;
  padding: 26px;
  box-shadow: 0 30px 80px rgba(12, 22, 38, 0.30);
  position: relative;
}

.ai-card::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 24px;
  right: 24px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.ai-card-head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: #9FB0C9;
  margin-bottom: 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--dark-border);
}

.ai-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 12px rgba(22, 163, 74, 0.6);
}

.ai-question {
  font-size: 16px;
  font-weight: 700;
  color: #E8EDF5;
  margin-bottom: 16px;
  padding: 12px 16px;
  background: var(--dark-2);
  border: 1px solid var(--dark-border);
  border-radius: 12px 12px 12px 4px;
}

.ai-answer {
  background: rgba(10, 20, 36, 0.72);
  border: 1px solid var(--dark-border);
  border-radius: 4px 12px 12px 12px;
  padding: 16px;
  font-size: 14px;
  color: #B7C4D8;
}

.ai-answer p + p { margin-top: 10px; }
.ai-answer strong { color: #8EC5FF; }

.ai-tag {
  display: flex;
  gap: 10px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.ai-tag span {
  font-size: 12px;
  color: #8EC5FF;
  background: rgba(27, 107, 255, 0.18);
  border: 1px solid rgba(27, 107, 255, 0.35);
  padding: 5px 12px;
  border-radius: 999px;
}

.ai-note {
  margin-top: 16px;
  font-size: 12px;
  color: #7E90AB;
}

/* ---------- 痛点区 ---------- */
.pain { background: var(--bg-deep); }

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow-card);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.card:hover {
  border-color: var(--accent-border);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  background: var(--accent-soft);
  margin-bottom: 20px;
}

.card p { color: var(--muted); font-size: 15px; }

/* ---------- GEO 介绍 ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.split p { color: var(--muted); margin-bottom: 14px; }
.split strong { color: var(--text-strong); }

.logic-stack { display: flex; flex-direction: column; gap: 16px; }

.logic-item {
  display: flex;
  gap: 20px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 22px 24px;
  box-shadow: var(--shadow-card);
}

.logic-num {
  font-size: 15px;
  font-weight: 900;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  padding-top: 2px;
}

.logic-item h3 { font-size: 17px; margin-bottom: 4px; }
.logic-item p { color: var(--muted); font-size: 14px; margin: 0; }

/* ---------- 结果区 / 行业区 ---------- */
.results,
.industries { background: var(--bg-deep); }

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-card);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.stat-card:hover {
  border-color: var(--accent-border);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}

.stat-num {
  font-size: 22px;
  font-weight: 900;
  color: var(--accent);
  margin-bottom: 12px;
}

.stat-card h3 { font-size: 16.5px; margin-bottom: 10px; }
.stat-card p { font-size: 13.5px; color: var(--muted); }

/* ---------- 案例预览 ---------- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.case-card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow-card);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.case-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}

.case-top { display: flex; gap: 8px; margin-bottom: 16px; flex-wrap: wrap; }

.case-city {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 4px 12px;
}

.case-dir {
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
}

.case-card h3 { font-size: 20px; margin-bottom: 6px; }
.case-meta { font-size: 13px; color: var(--muted-2); margin-bottom: 14px; }
.case-nums { font-size: 13.5px; color: var(--muted); }
.case-nums strong { color: var(--text-strong); font-size: 15px; }

.case-card-cta {
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-style: dashed;
  border-color: var(--border);
  background: transparent;
  box-shadow: none;
}

.case-card-cta h3 { margin-bottom: 10px; }
.case-card-cta p { color: var(--muted); font-size: 14px; margin-bottom: 20px; }
.case-card-cta .btn { align-self: flex-start; }

/* ---------- 方法四步 ---------- */
.method-strip { background: var(--bg-deep); }

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.step {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow-card);
}

.step-num {
  display: inline-flex;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 900;
  font-size: 17px;
  margin-bottom: 16px;
}

.step h3 { font-size: 17px; }
.step p { font-size: 13.5px; color: var(--muted); }

/* ---------- 区别区 ---------- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.card-line {
  border-left: 3px solid var(--accent);
  box-shadow: var(--shadow-card);
}

.card-line h3 { font-size: 17px; }
.card-line p { font-size: 14.5px; }

/* ---------- FAQ ---------- */
.faq-list { margin-top: 8px; }

.faq-item {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--surface);
  margin-bottom: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  background: none;
  border: none;
  color: var(--text-strong);
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}

.faq-q::after {
  content: "+";
  font-size: 22px;
  font-weight: 400;
  color: var(--accent);
  transition: transform 0.25s var(--ease);
  flex-shrink: 0;
}

.faq-item.open .faq-q::after { transform: rotate(45deg); }

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s var(--ease);
}

.faq-a-inner {
  padding: 0 24px 22px;
  color: var(--muted);
  font-size: 15px;
}

.faq-item.open .faq-a { max-height: 400px; }

/* ---------- CTA ---------- */
.cta-band {
  background:
    radial-gradient(700px 320px at 50% 0%, rgba(27, 107, 255, 0.08), transparent 65%),
    var(--bg-deep);
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
  text-align: center;
  padding: 88px 0;
}

.cta-band h2 { font-size: 34px; margin-bottom: 14px; }
.cta-band p { color: var(--muted); max-width: 640px; margin: 0 auto 32px; }

.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- 页面头 ---------- */
.page-head {
  padding: 84px 0 56px;
  background:
    radial-gradient(800px 320px at 82% 0%, rgba(27, 107, 255, 0.07), transparent 62%),
    linear-gradient(180deg, #FFFFFF 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border-soft);
}

.page-head h1 { margin-bottom: 18px; }

/* ---------- 服务流程 ---------- */
.process {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 40px;
}

.process-item {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 0;
  box-shadow: var(--shadow-card);
}

.process-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 8px;
}

.process-num {
  font-size: 30px;
  font-weight: 900;
  color: transparent;
  -webkit-text-stroke: 1px var(--accent);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  flex-shrink: 0;
}

.process-item h3 { font-size: 17px; margin-bottom: 0; }
.process-item p { font-size: 14px; color: var(--muted); }

/* ---------- 交付 ---------- */
.deliver { background: var(--bg-deep); }

.card-check {
  position: relative;
  padding-left: 56px;
}

.card-check::before {
  content: "";
  position: absolute;
  left: 24px;
  top: 30px;
  width: 20px;
  height: 10px;
  border-left: 3px solid var(--accent);
  border-bottom: 3px solid var(--accent);
  transform: rotate(-45deg);
}

.card-check h3 { font-size: 16.5px; }
.card-check p { font-size: 14px; }

.note-box {
  margin-top: 36px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
}

.note-box h3 { font-size: 18px; margin-bottom: 8px; }
.note-box p { color: var(--muted); font-size: 15px; }

/* ---------- 服务对象 ---------- */
.split-reverse { align-items: center; }

.scope-list { display: flex; flex-direction: column; gap: 14px; }

.scope-list li {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow-card);
}

.scope-list span {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 4px;
}

.scope-list p { font-size: 13.5px; color: var(--muted); margin: 0; }

/* ---------- 案例详情 ---------- */
.case-detail {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  padding: 40px;
  margin-bottom: 28px;
  box-shadow: var(--shadow-card);
}

.case-detail-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.case-detail h2 { font-size: 26px; margin-bottom: 8px; }
.case-detail .case-meta-line { font-size: 13.5px; color: var(--muted); }

.case-detail-section { margin-top: 26px; }

.case-detail-section h3 {
  font-size: 15px;
  color: var(--accent);
  letter-spacing: 0.06em;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-soft);
}

.case-detail-section p { color: var(--muted); font-size: 14.5px; margin-bottom: 8px; }
.case-detail-section strong { color: var(--text-strong); }

.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 18px;
}

.kpi {
  background: var(--bg-deep);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  padding: 18px;
}

.kpi b {
  display: block;
  font-size: 24px;
  font-weight: 900;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.kpi span { font-size: 12.5px; color: var(--muted); }

.scene-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.scene-list li {
  font-size: 13px;
  color: var(--text);
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
}

.scene-list li b { color: var(--accent); font-weight: 700; }

.case-conclusion {
  margin-top: 22px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  border-radius: 12px;
  padding: 18px 22px;
  font-size: 14.5px;
  color: var(--text);
}

.case-evidence {
  margin-top: 22px;
}

.case-evidence figure {
  background: var(--bg-deep);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  padding: 14px;
}

.case-evidence img {
  width: 100%;
  border-radius: 8px;
}

.case-evidence figcaption {
  font-size: 12.5px;
  color: var(--muted-2);
  margin-top: 10px;
  text-align: center;
  line-height: 1.6;
}

/* ---------- 结论 ---------- */
.conclusions { background: var(--bg-deep); }

/* ---------- 方法页 ---------- */
.check-list { margin-top: 28px; }

.check-list li {
  position: relative;
  padding-left: 34px;
  color: var(--muted);
  font-size: 15.5px;
  margin-bottom: 14px;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 9px;
  width: 16px;
  height: 8px;
  border-left: 2.5px solid var(--accent);
  border-bottom: 2.5px solid var(--accent);
  transform: rotate(-45deg);
}

/* ---------- 关于页 ---------- */
.about-facts {
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.fact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 22px;
  border-bottom: 1px solid var(--border-soft);
}

.fact:last-child { border-bottom: none; }

.fact span { font-size: 13px; color: var(--muted-2); }
.fact strong { font-size: 15px; color: var(--text-strong); font-weight: 700; text-align: right; }

.grid-5 {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-top: 36px;
}

.mini-card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-card);
}

.mini-card strong { display: block; font-size: 15.5px; color: var(--text-strong); margin-bottom: 6px; }
.mini-card span { font-size: 12.5px; color: var(--muted); }

.note-text { color: var(--muted-2); font-size: 13.5px; margin-top: 24px; }

/* ---------- 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.contact-card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-card);
}

.contact-label {
  display: block;
  font-size: 12.5px;
  color: var(--muted-2);
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.contact-value {
  display: block;
  font-size: 19px;
  font-weight: 700;
  color: var(--text-strong);
  word-break: break-all;
}

.contact-card a.contact-value:hover { color: var(--accent); }

.contact-sub {
  font-size: 12.5px;
  color: var(--muted-2);
  margin-top: 6px;
}

.contact-hint {
  margin-top: -8px;
  margin-bottom: 34px;
  background: var(--bg-deep);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  padding: 16px 22px;
  font-size: 14px;
  color: var(--text);
  text-align: center;
}

.contact-hint strong {
  color: var(--accent);
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--dark);
  border-top: 1px solid var(--dark-border);
  padding: 64px 0 32px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--dark-border);
}

.footer-brand { display: flex; gap: 14px; align-items: flex-start; }
.footer-brand .brand-logo { width: 40px; height: 40px; }
.footer-brand strong { font-size: 18px; color: #FFFFFF; display: block; margin-bottom: 6px; }
.footer-brand p { font-size: 13.5px; color: #93A5BD; }

.footer-nav { display: flex; flex-direction: column; gap: 10px; }
.footer-nav a { color: #93A5BD; font-size: 14.5px; transition: color 0.2s; }
.footer-nav a:hover { color: #8EC5FF; }

.footer-contact { display: flex; flex-direction: column; gap: 10px; }
.footer-contact a, .footer-contact span { color: #93A5BD; font-size: 14.5px; }
.footer-contact a:hover { color: #8EC5FF; }

.footer-bottom { padding-top: 24px; }
.footer-bottom p { font-size: 12.5px; color: #7E90AB; text-align: center; margin-bottom: 4px; }
.footer-bottom a { color: #7E90AB; }
.footer-bottom a:hover { color: #8EC5FF; }

/* ---------- 滚动揭示 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  h1 { font-size: 38px; }
  .hero-copy h1 { font-size: 46px; }
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-ai { max-width: 560px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .grid-5 { grid-template-columns: repeat(3, 1fr); }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  h1 { font-size: 30px; }
  h2 { font-size: 24px; }
  .hero { padding: 72px 0 64px; }
  .hero-copy h1 { font-size: 34px; }
  .hero-sub { font-size: 16px; }
  .hero-stats { grid-template-columns: 1fr; gap: 20px; }
  .grid-3, .grid-2, .split, .process, .kpi-row { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .grid-5 { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .section-head { flex-direction: column; align-items: flex-start; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }

  .site-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: var(--surface);
    border-bottom: 1px solid var(--border-soft);
    padding: 16px 24px 24px;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease), visibility 0.25s;
  }

  .site-nav.open { opacity: 1; transform: none; visibility: visible; }
  .site-nav > a { padding: 12px 8px; font-size: 16px; }
  .nav-cta { text-align: center; }
  .nav-toggle { display: flex; }
  .case-detail { padding: 24px; }
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
}