:root {
  --text: #101114;
  --muted: rgba(16, 17, 20, 0.68);
  --line: rgba(16, 17, 20, 0.1);
  --soft: #f5f6fb;
  --brand: linear-gradient(93deg, #ff6225 0%, #ff06a2 100%);
  --accent: #2455e6;
  --shadow: 0 22px 60px rgba(80, 82, 130, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background: #fff;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
}

.header-inner,
.inner {
  width: min(1080px, calc(100% - 44px));
  margin: 0 auto;
}

.header-inner {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  width: 120px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: rgba(16, 17, 20, 0.72);
  font-size: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 24px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}

.btn-primary {
  color: #fff;
  background: var(--brand);
  box-shadow: 0 16px 36px rgba(255, 44, 111, 0.2);
}

.btn-secondary {
  border: 1px solid var(--line);
  background: #fff;
}

.hero {
  padding: 86px 0 72px;
  background: linear-gradient(180deg, #fff 0%, #f3f5ff 100%);
}

.breadcrumb {
  margin-bottom: 24px;
  font-size: 13px;
  color: rgba(16, 17, 20, 0.58);
}

.breadcrumb a {
  color: var(--accent);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 52px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(36px, 5vw, 60px);
  line-height: 1.08;
  letter-spacing: 0;
  font-weight: 650;
}

.lead {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.hero-card {
  padding: 20px;
  border-radius: 22px;
  background: #fff;
  box-shadow: var(--shadow);
}

.section {
  padding: 82px 0;
}

.section-soft {
  background: var(--soft);
}

.section h2 {
  margin: 0;
  font-size: clamp(28px, 3.5vw, 42px);
  line-height: 1.2;
  font-weight: 620;
}

.section-intro {
  max-width: 780px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 30px;
}

.card,
.article-card,
.faq-item {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}

.card {
  padding: 24px;
}

.card h3,
.article-card h3,
.faq-item h3 {
  margin: 0 0 10px;
  font-size: 19px;
  line-height: 1.45;
}

.card p,
.article-card p,
.faq-item p,
.step-list li {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.article-card {
  padding: 22px;
}

.article-card a {
  color: var(--accent);
  font-weight: 600;
}

.step-list {
  display: grid;
  gap: 14px;
  margin: 28px 0 0;
  padding-left: 22px;
}

.faq-list {
  display: grid;
  gap: 14px;
  margin-top: 30px;
}

.faq-item {
  padding: 22px 24px;
}

.link-band {
  padding: 44px 0;
  background: #101114;
  color: #fff;
}

.link-band .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.link-band p {
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.68);
  line-height: 1.7;
}

.link-band .btn-secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.08);
}

footer {
  padding: 26px 22px;
  text-align: center;
  color: rgba(16, 17, 20, 0.52);
  font-size: 13px;
}

@media (max-width: 860px) {
  .nav {
    display: none;
  }

  .hero-grid,
  .grid,
  .link-band .inner {
    grid-template-columns: 1fr;
  }

  .link-band .inner {
    display: grid;
  }

  .hero {
    padding: 56px 0 54px;
  }

  .section {
    padding: 62px 0;
  }
}