:root {
  --red: #C41E3A;
  --red-dark: #9E1730;
  --bg: #F4F5F7;
  --bg2: #FBFBFC;
  --text: #1A1A1A;
  --muted: #5A5A5A;
  --line: #E2E4E8;
  --white: #FFFFFF;
  --radius: 10px;
  --wrap: 1100px;
  --shadow: 0 10px 28px rgba(26, 26, 26, 0.06);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

img, svg { max-width: 100%; height: auto; display: block; }

a { color: var(--red); }

.wrap {
  width: min(var(--wrap), calc(100% - 40px));
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 18px;
}

.brand svg { width: 32px; height: 32px; flex-shrink: 0; }

.nav {
  display: flex;
  gap: 6px;
  padding: 6px;
  border-radius: 999px;
  background: var(--bg);
}

.nav a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 18px;
  border-radius: 999px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
}

.nav a:hover { background: var(--white); }

.nav a[aria-current="page"] {
  background: var(--red);
  color: var(--white);
}

.hero {
  background: linear-gradient(180deg, var(--bg2), var(--bg));
  padding: 52px 0 32px;
}

.hero .wrap {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 44px;
  align-items: center;
}

.kicker {
  margin: 0 0 10px;
  color: var(--red);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.hero h1, .section h2 {
  margin: 0 0 14px;
  line-height: 1.35;
}

.hero h1 { font-size: 32px; }

.hero p, .section p { margin: 0 0 14px; }

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

.hero-actions, .cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: var(--radius);
  background: var(--red);
  color: var(--white);
  text-decoration: none;
  font-weight: 700;
  border: 1px solid var(--red);
}

.btn:hover { background: var(--red-dark); border-color: var(--red-dark); }

.btn-alt {
  background: var(--white);
  color: var(--red);
}

.btn-alt:hover { background: #fff4f6; }

.hero-visual {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
}

.section { padding: 50px 0; }

.section-alt { background: var(--bg2); }

.section h2 { font-size: 24px; }

.intro { max-width: 820px; margin-bottom: 22px; }

.grid-3, .grid-2, .platform, .reviews {
  display: grid;
  gap: 18px;
}

.grid-3, .reviews { grid-template-columns: repeat(3, 1fr); }

.grid-2, .platform { grid-template-columns: 1fr 1fr; }

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

.card h3, .news-item h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.icon { width: 36px; height: 36px; margin-bottom: 12px; color: var(--red); }

.icon svg { width: 36px; height: 36px; }

.platform .card, .dl-panel {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.platform .btn, .dl-panel .btn {
  margin-top: auto;
  align-self: flex-start;
}

.table-wrap { overflow-x: auto; border-radius: var(--radius); }

.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
}

.table th, .table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.table th { background: var(--red); color: var(--white); }

.table tbody tr:nth-child(even) { background: var(--bg2); }

.steps { margin: 0; padding: 0; list-style: none; display: grid; gap: 12px; }

.steps li {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px 18px 56px;
  position: relative;
}

.steps li::before {
  content: attr(data-step);
  position: absolute;
  left: 16px;
  top: 18px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--red);
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.news-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }

.news-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.news-date { margin: 0 0 8px; color: var(--muted); font-size: 13px; font-weight: 700; }

.faq details {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 4px 18px;
  margin-bottom: 10px;
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
  padding: 12px 0;
  list-style: none;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 10px;
  border-radius: 50%;
  background: var(--red);
  vertical-align: middle;
}

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

.footer {
  background: var(--white);
  border-top: 1px solid var(--line);
  padding: 28px 0;
  color: var(--muted);
  font-size: 13px;
}

.footer p { margin: 0 0 8px; }

.footer p:last-child { margin-bottom: 0; }

@media (max-width: 800px) {
  .header .wrap { flex-wrap: wrap; justify-content: center; padding: 12px 0; }
  .hero .wrap, .grid-3, .grid-2, .platform, .reviews { grid-template-columns: 1fr; }
  .hero h1 { font-size: 24px; }
  .nav { width: 100%; justify-content: center; flex-wrap: wrap; }
  .btn { width: 100%; }
}