* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #f4f4f5;
  color: #334155;
  font-family: system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

.app-wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 40px 22px 96px;
}

.top-bar {
  height: 7px;
  margin: -40px -22px 36px;
  background: linear-gradient(90deg, #3730a3 0%, #0284c7 100%);
  border-radius: 0 0 18px 18px;
}

.brand-block {
  text-align: center;
  padding: 12px 0 28px;
}

.brand-tile {
  width: 64px;
  height: 64px;
  margin: 0 auto 14px;
  display: grid;
  place-items: center;
  background: #3730a3;
  border-radius: 22px;
  box-shadow: 0 12px 28px rgba(55, 48, 163, 0.22);
}

.brand-tile svg {
  display: block;
}

.brand-block strong {
  display: block;
  font-size: 28px;
  letter-spacing: 0.14em;
  color: #3730a3;
}

.brand-block span {
  display: block;
  margin-top: 6px;
  color: #0284c7;
  font-size: 13px;
  font-weight: 600;
}

.pill {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px;
  width: fit-content;
  max-width: 100%;
  margin: 0 auto 64px;
  padding: 6px;
  background: #ffffff;
  border-radius: 999px;
  box-shadow: 0 10px 32px rgba(51, 65, 85, 0.08);
}

.pill a {
  display: inline-block;
  padding: 11px 26px;
  border-radius: 999px;
  color: #3730a3;
  text-decoration: none;
  font-weight: 700;
}

.pill a.active {
  background: #3730a3;
  color: #ffffff;
}

.hero {
  text-align: center;
  padding: 8px 8px 56px;
}

.kicker {
  margin: 0 0 14px;
  color: #0284c7;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.hero h1,
section h2 {
  color: #1e1b4b;
  line-height: 1.35;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: 2.05rem;
}

.stamp {
  display: inline-block;
  margin: 0 0 22px;
  color: #0284c7;
  font-size: 13px;
  font-weight: 700;
}

.hero p,
.prose p {
  margin: 0 0 16px;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin: 28px 0 12px;
}

.big-btn {
  display: inline-block;
  padding: 18px 42px;
  border-radius: 999px;
  background: #3730a3;
  color: #ffffff;
  text-decoration: none;
  font-size: 18px;
  font-weight: 700;
  box-shadow: 0 14px 30px rgba(55, 48, 163, 0.24);
}

.big-btn.sky {
  background: #0284c7;
  box-shadow: 0 14px 30px rgba(2, 132, 199, 0.2);
}

.big-btn.ghost {
  background: #ffffff;
  color: #3730a3;
  box-shadow: 0 0 0 2px #3730a3 inset;
}

.hint {
  margin: 10px 0 0;
  color: #64748b;
  font-size: 14px;
}

section {
  padding: 56px 0;
}

section h2 {
  margin: 0 0 22px;
  font-size: 1.45rem;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.soft-card {
  background: #ffffff;
  border-radius: 22px;
  padding: 28px 26px;
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.05);
}

.dl-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.glyph {
  flex: 0 0 52px;
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  background: #eef2ff;
  border-radius: 16px;
}

.glyph.sky {
  background: #e0f2fe;
}

.soft-card h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
  color: #1e1b4b;
}

.soft-card .big-btn {
  margin-top: 10px;
  font-size: 16px;
  padding: 14px 28px;
  box-shadow: none;
}

.defs {
  margin: 0;
}

.defs dt {
  margin: 26px 0 8px;
  color: #3730a3;
  font-size: 1.05rem;
  font-weight: 700;
}

.defs dt:first-child {
  margin-top: 0;
}

.defs dd {
  margin: 0;
  padding: 0 0 4px 18px;
  border-left: 3px solid #0284c7;
}

.pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.stack + .pair {
  margin-top: 18px;
}

.pair .soft-card {
  padding: 22px 20px;
}

.pair h3 {
  color: #0284c7;
}

.risk {
  background: #fee2e2;
  color: #9f1239;
  border-radius: 22px;
  padding: 30px 26px;
}

.risk h2,
.risk p {
  color: #9f1239;
}

.qa {
  padding: 20px 0;
  border-bottom: 1px solid #e4e4e7;
}

.qa:last-child {
  border-bottom: 0;
}

.qa h3 {
  margin: 0 0 8px;
  font-size: 1.02rem;
  color: #3730a3;
}

.qa p {
  margin: 0;
}

.news-item {
  padding: 18px 0;
  border-bottom: 1px dashed #d4d4d8;
}

.news-item:last-child {
  border-bottom: 0;
}

.news-item time {
  display: block;
  margin-bottom: 4px;
  color: #0284c7;
  font-size: 13px;
  font-weight: 700;
}

.news-item h3 {
  margin: 0 0 8px;
  font-size: 1.02rem;
  color: #1e1b4b;
}

.news-item p {
  margin: 0;
}

.steps {
  margin: 0;
  padding-left: 22px;
}

.steps li {
  margin: 0 0 14px;
}

.site-foot {
  margin-top: 72px;
  padding-top: 28px;
  border-top: 1px solid #e4e4e7;
  color: #64748b;
  font-size: 14px;
}

.site-foot p {
  margin: 0 0 10px;
}

@media (max-width: 640px) {
  .hero h1 {
    font-size: 1.55rem;
  }

  .pair {
    grid-template-columns: 1fr;
  }

  .pill a {
    padding: 10px 16px;
  }

  .dl-head {
    flex-direction: column;
  }
}