:root {
  --graphite: #2B2B2B;
  --panel: #3A3A3A;
  --line: #7A7A7A;
  --paper: #EFEFEF;
  --mute: #B5B5B5;
  --ink: #F3F3F3;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--graphite);
  color: var(--ink);
  line-height: 1.7;
}

a {
  color: #D4D4D4;
}

.wrap {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  background: #1F1F1F;
  border-bottom: 1px solid #4A4A4A;
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.06em;
}

.site-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  font-size: 13px;
}

.site-header nav a {
  text-decoration: none;
  color: var(--mute);
}

.hero {
  padding: 40px 0 18px;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(26px, 3.6vw, 36px);
  line-height: 1.35;
}

.hero p {
  margin: 0;
  max-width: 46em;
  color: var(--mute);
}

.compare-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0;
  margin: 10px 0 36px;
  border: 1px solid var(--line);
}

.compare-3 article {
  padding: 20px 18px 22px;
  background: var(--panel);
}

.compare-3 article + article {
  border-left: 1px solid var(--line);
}

.compare-3 .kicker {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mute);
}

.compare-3 h3 {
  margin: 8px 0 10px;
  font-size: 20px;
}

.compare-3 p {
  margin: 0;
  color: #D8D8D8;
  font-size: 14px;
}

section {
  margin: 0 0 46px;
}

section h2 {
  margin: 0 0 12px;
  font-size: 22px;
  font-weight: 650;
}

.card-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 18px 0;
}

.svg-card {
  background: #323232;
  border: 1px solid #555;
  padding: 14px;
}

.svg-card svg {
  width: 100%;
  height: 90px;
  display: block;
}

.svg-card h3 {
  margin: 10px 0 6px;
  font-size: 16px;
}

.svg-card p {
  margin: 0;
  color: var(--mute);
  font-size: 14px;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.panel {
  background: #323232;
  padding: 16px 18px;
  border-top: 2px solid var(--line);
}

.panel h3 {
  margin: 0 0 8px;
}

.steps {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  counter-reset: pstep;
}

.steps li {
  counter-increment: pstep;
  padding: 12px 0;
  border-bottom: 1px solid #4A4A4A;
}

.steps li::before {
  content: "0" counter(pstep);
  display: inline-block;
  width: 36px;
  color: var(--mute);
  margin-right: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: #323232;
}

th, td {
  border: 1px solid #555;
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

th {
  background: #1F1F1F;
  color: #E5E5E5;
}

.faq dt {
  margin: 18px 0 6px;
  font-weight: 700;
}

.faq dd {
  margin: 0;
  color: var(--mute);
}

.site-footer {
  background: #1F1F1F;
  color: #A3A3A3;
  padding: 28px 0 36px;
  font-size: 14px;
  border-top: 1px solid #4A4A4A;
}

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

@media (max-width: 900px) {
  .compare-3,
  .card-row,
  .two-col {
    grid-template-columns: 1fr;
  }

  .compare-3 article + article {
    border-left: 0;
    border-top: 1px solid var(--line);
  }
}