:root {
  --bg: #ffffff;
  --bg-soft: #f5f8ff;
  --ink: #0f1b2d;
  --ink-2: #4b5563;
  --ink-3: #6b7280;
  --primary: #2563eb;
  --primary-2: #1d4ed8;
  --accent: #06b6d4;
  --violet: #7c3aed;
  --teal: #0d9488;
  --line: #e5e9f0;
  --card: #ffffff;
  --shadow-sm: 0 1px 2px rgba(15, 27, 45, 0.05), 0 4px 12px rgba(15, 27, 45, 0.05);
  --shadow-md: 0 10px 30px rgba(15, 27, 45, 0.08);
  --radius: 16px;
  --radius-lg: 24px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* ============ 导航 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s, box-shadow .25s;
}
.site-header.scrolled { border-bottom-color: var(--line); box-shadow: var(--shadow-sm); }

.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; }

.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.brand-mark { display: inline-flex; }
.brand-text { letter-spacing: .5px; }

.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav a { font-size: 15px; color: var(--ink-2); font-weight: 500; transition: color .2s; }
.main-nav a:hover { color: var(--primary); }
.main-nav .nav-cta {
  color: #fff; background: var(--primary);
  padding: 9px 18px; border-radius: 999px; font-weight: 600;
  transition: background .2s, transform .2s;
}
.main-nav .nav-cta:hover { background: var(--primary-2); transform: translateY(-1px); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: .25s; }

/* ============ Hero ============ */
.hero { position: relative; overflow: hidden; background: linear-gradient(180deg, #eef4ff 0%, #ffffff 100%); }
.hero-grid {
  position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image: linear-gradient(rgba(37,99,235,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(37,99,235,.06) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 40%, transparent 100%);
}
.hero-inner {
  position: relative;
  display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 48px;
  padding: 72px 24px 80px;
}
.hero-copy { display: flex; flex-direction: column; align-items: flex-start; gap: 22px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; letter-spacing: 1px; color: var(--primary);
  text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--primary); border-radius: 2px; }

.hero h1 { font-size: 46px; line-height: 1.22; font-weight: 800; letter-spacing: -1px; }
.hero-sub { font-size: 18px; color: var(--ink-2); max-width: 520px; }

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn { display: inline-flex; align-items: center; justify-content: center; padding: 13px 26px; border-radius: 12px; font-size: 16px; font-weight: 600; transition: transform .2s, box-shadow .2s, background .2s; cursor: pointer; }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; box-shadow: 0 8px 20px rgba(37,99,235,.28); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(37,99,235,.34); }
.btn-ghost { background: #fff; color: var(--ink); border: 1px solid var(--line); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

.hero-trust { display: flex; gap: 20px; flex-wrap: wrap; font-size: 14px; color: var(--ink-3); }
.hero-trust li { display: flex; align-items: center; gap: 6px; }
.hero-trust li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }

.hero-art svg { width: 100%; height: auto; max-height: 440px; }

/* ============ 通用 section ============ */
.section { padding: 84px 0; }
.section-soft { background: var(--bg-soft); }

.section-head { max-width: 720px; margin: 0 auto 48px; text-align: center; }
.section-head .eyebrow { justify-content: center; }
.section-head .eyebrow::before { display: none; }
.section-head h2 { font-size: 34px; font-weight: 800; letter-spacing: -.5px; margin: 12px 0 14px; }
.section-sub { font-size: 17px; color: var(--ink-2); }

/* ============ 卡片网格 ============ */
.card-grid { display: grid; gap: 22px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.feature-card, .module-card, .cap-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; transition: transform .25s, box-shadow .25s, border-color .25s;
}
.feature-card:hover, .module-card:hover, .cap-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: #c7d8ff; }
.feature-card h3, .module-card h3 { font-size: 18px; margin: 16px 0 8px; }
.feature-card p, .module-card p { font-size: 15px; color: var(--ink-2); }

.icon-badge {
  width: 46px; height: 46px; border-radius: 12px; display: inline-flex; align-items: center; justify-content: center;
}
.icon-badge svg { width: 24px; height: 24px; }
.icon-badge.blue { background: #eaf1ff; color: var(--primary); }
.icon-badge.cyan { background: #e3f8fc; color: #0891b2; }
.icon-badge.violet { background: #f1ecff; color: var(--violet); }
.icon-badge.teal { background: #e0f6f3; color: var(--teal); }

/* ============ 痛点 ============ */
.pain-list { display: grid; gap: 0; max-width: 860px; margin: 0 auto; }
.pain-item { display: flex; gap: 22px; padding: 26px 8px; border-bottom: 1px solid var(--line); }
.pain-item:last-child { border-bottom: 0; }
.pain-num { font-size: 22px; font-weight: 800; color: #c7d8ff; line-height: 1.3; min-width: 40px; }
.pain-body h3 { font-size: 19px; margin-bottom: 6px; }
.pain-body p { color: var(--ink-2); font-size: 15px; }
.pain-conclusion {
  max-width: 860px; margin: 28px auto 0; text-align: center; font-size: 17px; font-weight: 600; color: var(--primary);
}

/* ============ 模块 / 能力 ============ */
.module-top { display: flex; align-items: center; justify-content: space-between; }
.module-tag { font-size: 12px; color: var(--ink-3); background: #f3f5f9; padding: 3px 10px; border-radius: 999px; }

.cap-head { text-align: center; margin: 52px 0 26px; }
.cap-head h3 { font-size: 24px; font-weight: 700; }
.cap-card { padding: 24px; }
.cap-icon { width: 42px; height: 42px; border-radius: 11px; background: #f3f6ff; color: var(--primary); display: flex; align-items: center; justify-content: center; margin-bottom: 14px; }
.cap-icon svg { width: 22px; height: 22px; }
.cap-card h4 { font-size: 16px; margin-bottom: 6px; }
.cap-card p { font-size: 14px; color: var(--ink-2); }

/* ============ 数据带 ============ */
.stats-band {
  margin-top: 52px; background: linear-gradient(135deg, #101f3c, #1b2f56);
  border-radius: var(--radius-lg); padding: 40px 32px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center;
}
.stat-num { font-size: 30px; font-weight: 800; color: #fff; letter-spacing: -.5px; }
.stat-label { font-size: 14px; color: #b9c8e8; margin-top: 4px; }

/* ============ 场景 ============ */
.scene-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.scene-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; }
.scene-head { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.scene-head h3 { font-size: 20px; }
.scene-list li { position: relative; padding: 8px 0 8px 24px; color: var(--ink-2); font-size: 15px; }
.scene-list li::before { content: ""; position: absolute; left: 4px; top: 16px; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }

/* ============ 案例 ============ */
.case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.case-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; transition: box-shadow .25s, transform .25s; }
.case-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.case-tag { display: inline-block; font-size: 12px; font-weight: 600; color: var(--primary); background: #eaf1ff; padding: 4px 12px; border-radius: 999px; margin-bottom: 14px; }
.case-card h3 { font-size: 18px; margin-bottom: 10px; }
.case-desc { font-size: 14.5px; color: var(--ink-2); margin-bottom: 18px; }
.case-metrics { display: flex; gap: 14px; flex-wrap: wrap; }
.metric {
  flex: 1; min-width: 150px; background: #f7faff; border: 1px solid #eaf1ff; border-radius: 12px;
  padding: 14px; display: flex; flex-direction: column; gap: 3px;
}
.metric em { font-style: normal; font-size: 12px; color: var(--ink-3); }
.m-before { font-size: 14px; color: var(--ink-3); text-decoration: line-through; }
.m-arrow { color: var(--accent); font-weight: 700; }
.m-after { font-size: 17px; font-weight: 700; color: var(--primary); }
.case-benefit { margin-top: 16px; font-size: 14.5px; font-weight: 600; color: var(--teal); }
.case-tasks { margin: 0 0 16px; padding: 0; list-style: none; }
.case-tasks li { position: relative; padding-left: 20px; margin-bottom: 8px; font-size: 14px; line-height: 1.7; color: var(--ink-2); }
.case-tasks li::before { content: ""; position: absolute; left: 2px; top: 9px; width: 7px; height: 7px; border-radius: 2px; background: var(--primary); opacity: .55; }
.case-human { display: flex; flex-wrap: wrap; gap: 8px; align-items: baseline; margin: 0 0 18px; padding: 10px 14px; font-size: 13.5px; line-height: 1.6; color: #92400e; background: #fffbeb; border-left: 3px solid #f59e0b; border-radius: 0 8px 8px 0; }
.case-human span { flex: none; font-weight: 700; color: #b45309; }
.case-card { display: flex; flex-direction: column; }
.case-card .case-metrics { margin-top: auto; }

/* ============ CTA ============ */
.cta { padding-bottom: 90px; }
.cta-inner {
  background: linear-gradient(135deg, #101f3c, #16306b 55%, #0f4a7a);
  border-radius: var(--radius-lg); padding: 60px 40px; text-align: center; color: #fff;
}
.cta-inner h2 { font-size: 32px; font-weight: 800; margin-bottom: 12px; }
.cta-inner > p { color: #c6d4ef; font-size: 17px; max-width: 560px; margin: 0 auto 34px; }
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.contact-item {
  display: flex; align-items: center; gap: 14px; text-align: left;
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12);
  border-radius: 14px; padding: 18px; transition: background .2s;
}
a.contact-item:hover { background: rgba(255,255,255,.12); }
.contact-item .icon-badge { background: rgba(255,255,255,.1); }
.contact-item .icon-badge.blue { color: #9cc0ff; }
.contact-item .icon-badge.cyan { color: #7fe3f5; }
.contact-item .icon-badge.violet { color: #c9b0ff; }
.contact-item em { display: block; font-style: normal; font-size: 12px; color: #b9c8e8; }
.contact-item strong { font-size: 15px; font-weight: 600; word-break: break-all; }

/* ============ 页脚 ============ */
.site-footer { background: #0b1729; color: #aab8cf; padding: 40px 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; gap: 30px; flex-wrap: wrap; }
.footer-brand .brand-text { color: #fff; font-size: 18px; font-weight: 700; }
.footer-brand p { margin-top: 6px; font-size: 14px; }
.footer-info { text-align: right; font-size: 13.5px; line-height: 1.9; }
.footer-info .icp { color: #7d8ba5; }

/* ============ 动画 ============ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ============ 响应式 ============ */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; padding: 48px 24px 56px; }
  .hero h1 { font-size: 36px; }
  .hero-art { order: -1; max-width: 420px; margin: 0 auto; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats-band { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .main-nav {
    position: fixed; top: 68px; left: 0; right: 0; flex-direction: column; align-items: flex-start;
    background: #fff; padding: 20px 24px; gap: 18px; border-bottom: 1px solid var(--line);
    transform: translateY(-12px); opacity: 0; pointer-events: none; transition: .25s;
  }
  .main-nav.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-toggle { display: flex; }
  .grid-4, .scene-grid, .case-grid { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .section-head h2 { font-size: 27px; }
  .hero h1 { font-size: 30px; }
  .stats-band { grid-template-columns: 1fr 1fr; }
  .footer-inner { flex-direction: column; }
  .footer-info { text-align: left; }
}

/* ============ 配图（图 1–4） ============ */
.figure-block {
  margin: 56px auto 0;
  max-width: 980px;
  background: linear-gradient(180deg, #f8fbff 0%, #ffffff 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 26px 22px;
  box-shadow: var(--shadow-sm);
}
.figure-cap {
  display: block;
  text-align: center;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .5px;
  color: var(--primary);
  margin-bottom: 14px;
}
.fig-svg { display: block; width: 100%; height: auto; }

.cap-sub { font-size: 14.5px; color: var(--ink-2); margin-top: 6px; }