:root {
  --bg: #f7f8ff;
  --bg-alt: #eef2ff;
  --text: #1f2533;
  --muted: #5d6678;
  --line: #dbe1f7;
  --accent: #6a7bff;
  --accent-2: #55c2a3;
  --card: #ffffffcc;
  --radius: 20px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 20% 0%, #ffffff, var(--bg) 45%, #edf0ff 100%);
}

a {
  color: inherit;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: #f7f8ffd6;
  border-bottom: 1px solid #e6eaf8;
}

.nav-wrap {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.2px;
}

.nav-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 500;
}

.nav-links a[aria-current="page"] {
  color: var(--text);
}

.hero {
  padding: 72px 0 48px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 32px;
  align-items: center;
}

.pill {
  display: inline-block;
  margin: 0 0 10px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: #44506a;
  background: #ffffffbd;
  font-size: 14px;
}

h1 {
  margin: 0;
  font-size: clamp(34px, 4.2vw, 56px);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.hero-desc {
  margin-top: 16px;
  color: var(--muted);
  max-width: 620px;
  line-height: 1.72;
}

.cta-row {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
  border: 1px solid transparent;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.btn-ghost {
  border-color: var(--line);
  background: #ffffffcc;
}

.phone-mock {
  display: flex;
  justify-content: center;
}

.mock-card {
  width: min(360px, 100%);
  padding: 20px;
  border-radius: 28px;
  background: linear-gradient(180deg, #ffffff, #f5f7ff);
  border: 1px solid #dde4ff;
  box-shadow: 0 20px 45px #7d8cff2a;
}

.mock-card h3 {
  margin: 0 0 12px;
}

.mock-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mock-card li {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid #e7ebfb;
  color: var(--muted);
}

.mock-card li strong {
  color: var(--text);
}

.mock-card p {
  margin: 14px 0 0;
  color: var(--muted);
}

.section {
  padding: 56px 0;
}

.section-alt {
  background: linear-gradient(180deg, #f3f5ff80, #edf1ff80);
  border-top: 1px solid #e6ebfb;
  border-bottom: 1px solid #e6ebfb;
}

h2 {
  margin-top: 0;
  margin-bottom: 16px;
  font-size: clamp(24px, 2.2vw, 34px);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.feature-card,
.list-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  backdrop-filter: blur(8px);
}

.feature-card {
  transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease, background 260ms ease;
  transform-origin: center;
  cursor: pointer;
}

.feature-card:hover {
  transform: translateY(-2px) scale(1.01);
  border-color: #cfd8ff;
  box-shadow: 0 14px 30px #7182ff24;
  background: linear-gradient(135deg, #ffffff, #eef2ff);
}

.feature-card.card-pop,
.feature-card:active {
  transform: translateY(-2px) scale(1.03);
  border-color: #b9c6ff;
  box-shadow: 0 18px 36px #6f81ff38;
  background: linear-gradient(135deg, #f9fbff, #e7efff);
}

.feature-card h3 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 18px;
}

.feature-card p,
.lead,
.prose p,
.prose li {
  color: var(--muted);
  line-height: 1.7;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: start;
}

.list-card ul {
  margin: 0;
  padding-left: 20px;
}

.list-card li {
  margin: 10px 0;
}

.page-main h1 {
  font-size: clamp(32px, 3.2vw, 44px);
  margin-bottom: 8px;
}

.faq-list details {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
  margin-bottom: 10px;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 600;
}

.faq-list p {
  margin-top: 8px;
}

pre {
  margin: 8px 0 0;
  overflow-x: auto;
  padding: 12px;
  border-radius: 12px;
  background: #f4f6ff;
  border: 1px solid #e3e8fc;
  color: #42506b;
}

.prose {
  max-width: 860px;
}

.prose h2 {
  margin-top: 28px;
  margin-bottom: 10px;
  font-size: 24px;
}

.prose ul {
  padding-left: 20px;
}

.site-footer {
  border-top: 1px solid #e6ebfb;
  padding: 24px 0;
  background: #f8f9ffcc;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}

.footer-grid p {
  margin: 0;
  color: var(--muted);
}

.icp-note {
  font-size: 13px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
}

@media (max-width: 960px) {
  .hero-grid,
  .split,
  .card-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 44px;
  }
}