:root {
  --plum: #581C87;
  --plum-2: #6B21A8;
  --wash: #FAF5FF;
  --card: #FFFFFF;
  --ink: #3B0764;
  --muted: #5B21B6;
  --line: #E9D5FF;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--wash);
  color: var(--ink);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
  font-size: 16px;
}

a {
  color: var(--plum-2);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  width: min(820px, calc(100% - 28px));
  margin: 0 auto;
}

.top {
  padding: 22px 0 10px;
}

.brand {
  font-weight: 700;
  color: var(--plum);
  font-size: 18px;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 12px;
  font-size: 14px;
}

.hero {
  padding: 10px 0 22px;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1.35;
  color: var(--plum);
}

.hero p {
  margin: 0 0 12px;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding-bottom: 28px;
}

.wide-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 22px 22px 18px;
  box-shadow: 0 10px 30px rgba(88, 28, 135, 0.06);
}

.wide-card h2 {
  margin: 0 0 12px;
  font-size: 20px;
  color: var(--plum);
}

.wide-card p {
  margin: 0 0 12px;
}

details {
  background: var(--wash);
  border-radius: 12px;
  padding: 10px 12px;
  margin: 8px 0;
}

summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--plum-2);
}

details p {
  margin: 10px 0 4px;
}

.svg-row {
  display: flex;
  gap: 10px;
  margin: 12px 0;
}

.svg-card {
  flex: 1;
  background: var(--wash);
  border-radius: 12px;
  padding: 12px;
  font-size: 13px;
}

.svg-card svg {
  display: block;
  margin-bottom: 8px;
}

.steps {
  margin: 12px 0;
  padding: 0;
}

.steps li {
  list-style: none;
  padding: 10px 0 10px 0;
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 12px;
}

.steps span {
  color: var(--plum);
  font-weight: 700;
  min-width: 2em;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 12px 0;
}

th,
td {
  border: 1px solid var(--line);
  padding: 8px;
  text-align: left;
}

th {
  background: #F3E8FF;
  color: var(--plum);
}

.faq h2 {
  color: var(--plum);
}

.faq article {
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.faq h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

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

.foot {
  padding: 18px 0 36px;
  color: var(--muted);
  font-size: 13px;
}

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

@media (max-width: 640px) {
  .svg-row {
    flex-direction: column;
  }
}