:root {
  --red: #C8161D;
  --red-dark: #A31218;
  --bg: #F5F6F8;
  --bg2: #FAFBFC;
  --text: #1B1B1B;
  --muted: #5C5C5C;
  --line: #E4E6EA;
  --white: #FFFFFF;
  --radius: 12px;
  --wrap: 1120px;
  --shadow: 0 8px 24px rgba(27, 27, 27, 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: 72px;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.02em;
}

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

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

.nav a {
  display: inline-flex;
  align-items: center;
  justify-content: 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) 0%, var(--bg) 100%);
  padding: 56px 0 36px;
}

.hero .wrap {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 48px;
  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;
}

.lead,
.hero p,
.section p {
  margin: 0 0 14px;
  color: var(--text);
}

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

.hero-actions,
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  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: #fff5f5;
}

.hero-visual {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}

.hero-visual svg {
  width: 100%;
  height: auto;
}

.section {
  padding: 52px 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: 20px;
}

.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: 24px;
  box-shadow: var(--shadow);
}

.card h3,
.news-item h3 {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.4;
}

.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);
  box-shadow: var(--shadow);
}

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

.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);
  font-weight: 700;
}

.table tr:last-child td {
  border-bottom: 0;
}

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

.steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.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: 14px;
}

.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 4px 16px;
  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: 1040px) {
  .hero .wrap {
    gap: 28px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .section h2 {
    font-size: 22px;
  }
}

@media (max-width: 800px) {
  .header .wrap {
    flex-wrap: wrap;
    justify-content: center;
    padding: 12px 0;
    min-height: 0;
  }

  .hero {
    padding: 36px 0 20px;
  }

  .hero .wrap,
  .grid-3,
  .grid-2,
  .platform,
  .reviews {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 40px 0;
  }
}

@media (max-width: 600px) {
  .wrap {
    width: calc(100% - 28px);
  }

  .nav {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }

  .hero h1 {
    font-size: 22px;
  }

  .section h2 {
    font-size: 20px;
  }

  .btn {
    width: 100%;
  }

  .table th,
  .table td {
    font-size: 13px;
    padding: 10px;
  }
}