/* ============ 序言 CRM 落地页样式 ============ */
:root {
  --primary: #4c6fff;
  --primary-dark: #3a56d4;
  --accent: #7c5cff;
  --grad: linear-gradient(120deg, #4c6fff, #7c5cff);
  --bg: #ffffff;
  --bg-alt: #f6f8fc;
  --bg-deep: #0e1230;
  --text: #1a2138;
  --text-muted: #5c6b8a;
  --text-faint: #8a93a6;
  --border: #e6eaf2;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow: 0 10px 40px rgba(76, 111, 255, 0.12);
  --shadow-lg: 0 24px 64px rgba(30, 41, 90, 0.16);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 22px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 6px 20px rgba(76, 111, 255, 0.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(76, 111, 255, 0.45); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: rgba(76, 111, 255, 0.08); }
.btn-light { background: #fff; color: var(--primary); }
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25); }
.btn-ghost-light { background: transparent; color: #fff; border-color: rgba(255, 255, 255, 0.5); }
.btn-ghost-light:hover { border-color: #fff; background: rgba(255, 255, 255, 0.1); }
.btn-lg { padding: 14px 32px; font-size: 16px; border-radius: 14px; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; height: 64px; gap: 32px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-logo {
  width: 30px; height: 30px;
  border-radius: 9px;
  background: var(--grad);
  color: #fff;
  font-size: 16px; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.brand-logo.sm { width: 22px; height: 22px; font-size: 12px; border-radius: 7px; }
.brand-name { font-size: 17px; font-weight: 700; color: var(--text); }
.nav-links { display: flex; gap: 26px; flex: 1; }
.nav-links a { color: var(--text-muted); text-decoration: none; font-size: 14.5px; font-weight: 500; transition: color 0.15s; }
.nav-links a:hover { color: var(--primary); }
.nav-actions { display: flex; gap: 10px; align-items: center; }
.nav-burger { display: none; flex-direction: column; gap: 4px; background: none; border: none; cursor: pointer; padding: 6px; }
.nav-burger span { width: 20px; height: 2px; background: var(--text); border-radius: 2px; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding: 88px 0 72px; }
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.orb { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.5; }
.orb-1 { width: 480px; height: 480px; background: #4c6fff; top: -160px; left: -120px; }
.orb-2 { width: 420px; height: 420px; background: #a78bfa; bottom: -180px; right: -100px; }
.grid-lines {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(76, 111, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(76, 111, 255, 0.06) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 30%, transparent 70%);
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px;
  background: rgba(76, 111, 255, 0.08);
  color: var(--primary);
  font-size: 13px; font-weight: 600;
  margin-bottom: 22px;
}
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: #34d399; animation: pulse 1.6s infinite; }
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.5); } 50% { box-shadow: 0 0 0 6px rgba(52, 211, 153, 0); } }
.hero-title { font-size: 54px; line-height: 1.18; font-weight: 800; letter-spacing: -1px; margin-bottom: 20px; }
.hero-title .grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { font-size: 17px; color: var(--text-muted); margin-bottom: 32px; }
.hero-cta { display: flex; gap: 14px; margin-bottom: 26px; flex-wrap: wrap; }
.hero-meta { display: flex; gap: 20px; flex-wrap: wrap; font-size: 13.5px; color: var(--text-faint); }
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }

/* ---------- Mockup ---------- */
.hero-shot { position: relative; }
.window {
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.window-bar {
  display: flex; align-items: center; gap: 7px;
  padding: 12px 16px;
  background: #fbfcff;
  border-bottom: 1px solid var(--border);
}
.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot.r { background: #ff5f57; } .dot.y { background: #febc2e; } .dot.g { background: #28c840; }
.window-title { margin-left: 10px; font-size: 12.5px; color: var(--text-faint); }
.window-body { display: flex; height: 420px; }
.side { width: 128px; background: #f8f9fe; border-right: 1px solid var(--border); padding: 12px 8px; }
.side-item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; border-radius: 10px;
  font-size: 12.5px; color: var(--text-muted);
  margin-bottom: 4px;
}
.side-item.active { background: rgba(76, 111, 255, 0.12); color: var(--primary); font-weight: 600; }
.side-icon { font-size: 13px; }
.main { flex: 1; display: flex; flex-direction: column; background: #fff; }
.entity-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 14px;
  background: linear-gradient(90deg, rgba(76, 111, 255, 0.1), rgba(76, 111, 255, 0.03));
  border-bottom: 1px solid rgba(76, 111, 255, 0.15);
  font-size: 12px; color: var(--text-muted);
}
.entity-tag {
  background: var(--grad); color: #fff;
  font-size: 11.5px; font-weight: 600;
  padding: 2px 10px; border-radius: 999px;
}
.chat { flex: 1; padding: 18px 16px; display: flex; flex-direction: column; gap: 14px; overflow: hidden; }
.msg { display: flex; }
.msg.user { justify-content: flex-end; }
.bubble {
  max-width: 82%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 12.5px;
  line-height: 1.65;
  background: #f3f5fb;
  border: 1px solid var(--border);
  color: var(--text);
  border-top-left-radius: 4px;
}
.bubble.user {
  background: var(--grad); color: #fff;
  border: none;
  border-bottom-right-radius: 4px;
  border-top-left-radius: 14px;
}
.tool-pill {
  display: inline-flex; align-items: center; gap: 6px;
  margin-bottom: 8px;
  font-size: 11px; color: var(--accent);
  background: rgba(124, 92, 255, 0.1);
  border: 1px solid rgba(124, 92, 255, 0.25);
  padding: 3px 10px; border-radius: 999px;
  width: fit-content;
}

/* ---------- Stats ---------- */
.stats { border-top: 1px solid var(--border); background: var(--bg-alt); }
.stats-inner {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 24px; padding: 40px 24px;
}
.stat { text-align: center; }
.stat-num { font-size: 36px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-label { margin-top: 6px; font-size: 13px; color: var(--text-muted); }

/* ---------- Section 通用 ---------- */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 56px; }
.section-head h2 { font-size: 36px; font-weight: 800; letter-spacing: -0.5px; margin-bottom: 14px; }
.section-head h2 em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.section-head p { font-size: 16px; color: var(--text-muted); }

/* ---------- AI 能力 ---------- */
.ai-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.ai-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px 28px;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}
.ai-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(76, 111, 255, 0.35); }
.ai-card.highlight { border-color: rgba(76, 111, 255, 0.45); box-shadow: var(--shadow); }
.ai-icon { font-size: 28px; margin-bottom: 16px; }
.ai-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.ai-card p { font-size: 14px; color: var(--text-muted); }

/* ---------- 功能 ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feature {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
  transition: all 0.25s ease;
}
.feature:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.feature h3 { font-size: 16.5px; font-weight: 700; margin-bottom: 8px; }
.feature h3::before { content: "✓ "; color: var(--primary); font-weight: 800; }
.feature p { font-size: 13.5px; color: var(--text-muted); }

/* ---------- 品牌代言人 ---------- */
.spokesperson {
  background: linear-gradient(135deg, #fff5f3 0%, #ffffff 50%, #fff7f4 100%);
  overflow: hidden;
}
.spokesperson-inner {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 64px;
  align-items: center;
}
.spokesperson-photo {
  position: relative;
}
.spokesperson-photo::before {
  content: "";
  position: absolute;
  inset: -18px;
  border-radius: 32px;
  background: radial-gradient(closest-side, rgba(200, 40, 30, 0.22), transparent 70%);
  z-index: 0;
}
.spokesperson-photo img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: auto;
  display: block;
  border-radius: 24px;
  border: 1px solid rgba(200, 50, 35, 0.2);
  box-shadow: 0 24px 64px rgba(180, 30, 20, 0.28);
}
.spokesperson-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(200, 50, 35, 0.1);
  color: #c0392b;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}
.spokesperson-copy h2 {
  font-size: 44px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 6px;
  color: var(--text);
}
.spokesperson-role {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 28px;
}
.spokesperson-copy blockquote {
  margin: 0 0 20px;
  padding: 22px 26px;
  font-size: 19px;
  line-height: 1.9;
  font-weight: 600;
  color: var(--text);
  background: #fff;
  border-left: 4px solid #c0392b;
  border-radius: 0 16px 16px 0;
  box-shadow: 0 8px 28px rgba(180, 30, 20, 0.1);
}
.spokesperson-note {
  font-size: 14px;
  color: var(--text-faint);
}

/* ---------- 对比表 ---------- */
.compare-table {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  box-shadow: 0 4px 24px rgba(30, 41, 90, 0.06);
}
.compare-table table { width: 100%; border-collapse: collapse; min-width: 680px; }
.compare-table th, .compare-table td { padding: 16px 20px; text-align: left; font-size: 14px; border-bottom: 1px solid var(--border); }
.compare-table thead th { background: #fbfcff; font-size: 15px; }
.compare-table thead th.us { color: var(--primary); }
.compare-table .us { font-weight: 600; }
.compare-table tbody tr:last-child td { border-bottom: none; }
.compare-table .dim { color: var(--text-faint); font-size: 13px; white-space: nowrap; }
.compare-table td b { color: var(--primary); }
.compare-table tbody tr:hover td { background: #fafbff; }

/* ---------- 多端 ---------- */
.multi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-bottom: 40px; }
.multi-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  text-align: center;
  transition: all 0.25s ease;
}
.multi-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.multi-icon { font-size: 34px; margin-bottom: 14px; }
.multi-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.multi-card p { font-size: 13.5px; color: var(--text-muted); }
.multi-link {
  display: inline-block;
  margin-top: 14px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
}
.multi-link:hover { text-decoration: underline; }
.multi-link.soon { color: var(--text-faint); cursor: default; text-decoration: none; }

.deploy-box { max-width: 720px; margin: 0 auto; }
.deploy-code {
  background: var(--bg-deep);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.deploy-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: #aab4d6;
  font-size: 13px;
}
.deploy-dot { width: 10px; height: 10px; border-radius: 50%; background: #28c840; }
.deploy-code pre {
  padding: 22px 24px;
  font-family: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  font-size: 13.5px;
  line-height: 1.8;
  color: #d6def7;
  overflow-x: auto;
}
.c-dim { color: #6b779f; }

/* ---------- CTA ---------- */
.cta {
  position: relative;
  padding: 88px 0;
  background: linear-gradient(135deg, #3a4fd8 0%, #6d4ff0 60%, #8b5cf6 100%);
  overflow: hidden;
  text-align: center;
}
.cta::before {
  content: "";
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.08) 1px, transparent 1px);
  background-size: 40px 40px;
}
.cta-inner { position: relative; }
.cta h2 { font-size: 38px; font-weight: 800; color: #fff; margin-bottom: 12px; letter-spacing: -0.5px; }
.cta p { color: rgba(255, 255, 255, 0.85); font-size: 16px; margin-bottom: 30px; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- FAQ ---------- */
.faq-container { max-width: 760px; }
.faq-item { border: 1px solid var(--border); border-radius: 14px; margin-bottom: 12px; overflow: hidden; background: #fff; }
.faq-q {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 22px;
  background: none; border: none;
  font-size: 15px; font-weight: 600;
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
  text-align: left;
}
.faq-q:hover { color: var(--primary); }
.faq-arrow { transition: transform 0.25s ease; color: var(--text-faint); }
.faq-item.open .faq-arrow { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-a p { padding: 0 22px 18px; font-size: 14px; color: var(--text-muted); }

/* ---------- Footer ---------- */
.footer { background: var(--bg-deep); color: #aab4d6; padding: 40px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-size: 14px; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { color: #aab4d6; text-decoration: none; font-size: 13.5px; }
.footer-links a:hover { color: #fff; }
.footer-copy { font-size: 12.5px; color: #6b779f; }

/* ---------- 动效 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 企业记忆引擎 ---------- */
.memory-layers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-bottom: 40px; }
.memory-layer {
  position: relative;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px 28px;
  transition: all 0.25s ease;
  overflow: hidden;
}
.memory-layer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--grad);
  opacity: 0.9;
}
.memory-layer:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(76, 111, 255, 0.35); }
.memory-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px;
  border-radius: 12px;
  background: rgba(76, 111, 255, 0.1);
  color: var(--primary);
  font-size: 15px; font-weight: 800;
  margin-bottom: 16px;
}
.memory-layer h3 { font-size: 20px; font-weight: 800; margin-bottom: 4px; }
.memory-role { font-size: 13px; color: var(--accent); font-weight: 600; margin-bottom: 12px; }
.memory-desc { font-size: 14px; color: var(--text-muted); margin-bottom: 18px; }
.memory-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text-faint);
  font-size: 12px;
  font-weight: 600;
}

.memory-tech {
  background: var(--bg-deep);
  border-radius: var(--radius-lg);
  padding: 40px 40px 36px;
  box-shadow: var(--shadow-lg);
  margin-bottom: 40px;
}
.memory-tech-head {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
  align-items: start;
  margin-bottom: 32px;
}
.tech-kicker {
  display: inline-block;
  font-size: 12px; font-weight: 700; letter-spacing: 0.08em;
  color: #9db4ff;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.memory-tech-head h3 { color: #fff; font-size: 24px; font-weight: 800; line-height: 1.4; }
.memory-tech-head p { color: #aab4d6; font-size: 14.5px; }
.tech-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.tech-item {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 22px 20px;
}
.tech-ico { font-size: 24px; display: block; margin-bottom: 12px; }
.tech-item h4 { color: #fff; font-size: 15.5px; font-weight: 700; margin-bottom: 8px; }
.tech-item p { color: #8f9cc4; font-size: 13px; }

.memory-search {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 22px;
  align-items: center;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px 32px;
  box-shadow: 0 4px 24px rgba(30, 41, 90, 0.06);
}
.memory-search-icon {
  width: 56px; height: 56px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 26px;
  border-radius: 16px;
  background: rgba(76, 111, 255, 0.1);
}
.memory-search-body h3 { font-size: 20px; font-weight: 800; margin-bottom: 6px; }
.memory-search-body p { font-size: 14px; color: var(--text-muted); max-width: 620px; }
.search-chips { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.search-chips span {
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 12.5px;
  font-weight: 600;
}

/* ---------- 复利价值（数据飞轮） ---------- */
.flywheel { text-align: center; }
.flywheel-formula {
  display: inline-flex; align-items: center; gap: 14px;
  margin: 0 auto 44px;
  padding: 18px 34px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid rgba(76, 111, 255, 0.25);
  box-shadow: var(--shadow);
  font-size: 22px; font-weight: 800;
  color: var(--text);
}
.flywheel-formula .eq { color: var(--text-faint); font-weight: 700; }
.flywheel-formula .op { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; font-size: 26px; }
.flywheel-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 34px;
}
.fw-step {
  flex: 1;
  max-width: 190px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 18px;
  transition: all 0.25s ease;
}
.fw-step:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(76, 111, 255, 0.35); }
.fw-ico {
  width: 46px; height: 46px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 22px;
  border-radius: 14px;
  background: rgba(76, 111, 255, 0.1);
  margin-bottom: 12px;
}
.fw-step h4 { font-size: 16.5px; font-weight: 800; margin-bottom: 6px; }
.fw-step p { font-size: 12.5px; color: var(--text-muted); }
.fw-arrow { font-size: 22px; color: var(--primary); font-weight: 800; flex-shrink: 0; }
.flywheel-note { max-width: 720px; margin: 0 auto; font-size: 14.5px; color: var(--text-muted); }

/* ---------- 企业级信任底座 ---------- */
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.trust-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: all 0.25s ease;
}
.trust-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(76, 111, 255, 0.35); }
.trust-icon { font-size: 28px; margin-bottom: 14px; }
.trust-item h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.trust-item p { font-size: 13.5px; color: var(--text-muted); }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-title { font-size: 40px; }
  .ai-grid, .feature-grid, .multi-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .spokesperson-inner { grid-template-columns: 1fr; gap: 36px; }
  .spokesperson-photo { max-width: 340px; margin: 0 auto; }
  .spokesperson-copy { text-align: center; }
  .spokesperson-copy blockquote { text-align: left; }
  .nav-links { display: none; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: #fff; padding: 16px 24px; border-bottom: 1px solid var(--border); gap: 14px; }
  .nav-burger { display: flex; }
  .section { padding: 72px 0; }
  .section-head h2, .cta h2 { font-size: 30px; }
  .memory-layers { grid-template-columns: 1fr; }
  .memory-tech-head { grid-template-columns: 1fr; gap: 18px; }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .memory-search { grid-template-columns: auto 1fr; }
  .search-chips { grid-column: 1 / -1; justify-content: flex-start; }
  .flywheel-steps { flex-wrap: wrap; }
  .fw-arrow { transform: rotate(90deg); }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .ai-grid, .feature-grid, .multi-grid { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 48px; }
  .hero-title { font-size: 33px; }
  .hero-cta .btn { width: 100%; }
  .nav-actions .btn-ghost { display: none; }
  .window-body { height: 340px; }
  .side { display: none; }
  .memory-tech { padding: 28px 20px; }
  .tech-grid { grid-template-columns: 1fr; }
  .memory-search { grid-template-columns: 1fr; }
  .memory-search-icon { width: 48px; height: 48px; }
  .flywheel-formula { font-size: 17px; padding: 14px 20px; gap: 8px; }
  .fw-step { max-width: none; flex: 1 1 100%; }
  .trust-grid { grid-template-columns: 1fr; }
}