*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, sans-serif;
  background:
    radial-gradient(circle at 50% 0%, rgba(26, 115, 232, 0.1), transparent 22%),
    linear-gradient(180deg, #ffffff 0%, #f8fafd 100%);
  color: #202124;
}

.knowledge-page {
  width: min(1080px, 100%);
  margin: 0 auto;
  padding: 32px 24px 48px;
  box-sizing: border-box;
  overflow-x: clip;
}

.knowledge-back {
  display: inline-block;
  color: #1a73e8;
  text-decoration: none;
  font-size: 14px;
}

.knowledge-header {
  margin-top: 28px;
}

.knowledge-header h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 48px);
  line-height: 1.1;
  overflow-wrap: anywhere;
}

.knowledge-header p {
  max-width: 920px;
  margin: 16px 0 0;
  color: #4b5563;
  font-size: 18px;
  line-height: 1.7;
  text-wrap: pretty;
  overflow-wrap: anywhere;
}

.knowledge-card {
  margin-top: 22px;
  width: 100%;
  padding: 22px 24px;
  border: 1px solid #dfe1e5;
  border-radius: 24px;
  background: #ffffff;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.05);
}

.knowledge-card h2 {
  margin-top: 0;
  font-size: 22px;
  overflow-wrap: anywhere;
}

.knowledge-card p {
  margin: 0;
  color: #4b5563;
  font-size: 16px;
  line-height: 1.7;
  overflow-wrap: anywhere;
}

.knowledge-card p + p {
  margin-top: 14px;
}

.knowledge-card ul {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  line-height: 1.7;
  color: #334155;
}

.knowledge-card ol {
  margin: 0;
  padding-left: 22px;
  line-height: 1.7;
  color: #334155;
}

.knowledge-card ul li {
  position: relative;
  min-height: 28px;
  padding-left: 40px;
}

.knowledge-card ul li::before {
  content: "";
  position: absolute;
  top: 4px;
  left: 0;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  background: #63b556;
  box-shadow: 0 1px 2px rgba(76, 175, 80, 0.16);
}

.knowledge-card ul li::after {
  content: "";
  position: absolute;
  top: 10px;
  left: 7px;
  width: 6px;
  height: 3px;
  border-left: 2px solid #ffffff;
  border-bottom: 2px solid #ffffff;
  transform: rotate(-45deg);
}

.knowledge-card ol li + li {
  margin-top: 8px;
}

.knowledge-cta {
  display: inline-block;
  margin-top: 16px;
  padding: 12px 18px;
  border-radius: 999px;
  background: #1a73e8;
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
}

.knowledge-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.knowledge-links a {
  display: block;
  min-width: 0;
  padding: 16px 18px;
  border: 1px solid #e4e8ef;
  border-radius: 18px;
  background: #fbfcff;
  color: #202124;
  text-decoration: none;
}

.knowledge-links strong {
  display: block;
  overflow-wrap: anywhere;
}

.knowledge-links span {
  display: block;
  margin-top: 8px;
  color: #5f6368;
  font-size: 14px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.knowledge-intro-note {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 16px;
  background: #f6f9ff;
  border: 1px solid #d8e6ff;
  color: #41516b;
  font-size: 14px;
  line-height: 1.6;
}

.knowledge-accent {
  background:
    linear-gradient(180deg, rgba(26, 115, 232, 0.06), rgba(26, 115, 232, 0.02)),
    #ffffff;
  border-color: #d8e6ff;
}

.knowledge-accent h2 {
  color: #133a73;
}

.knowledge-compact-list {
  margin: 0;
}

.knowledge-compare-grid,
.knowledge-scenario-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.knowledge-compare-card,
.knowledge-scenario-card {
  min-width: 0;
  padding: 16px 18px;
  border-radius: 18px;
  border: 1px solid #e4e8ef;
  background: #fbfcff;
}

.knowledge-compare-card h3,
.knowledge-scenario-card h3 {
  margin: 0;
  font-size: 16px;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.knowledge-compare-card h3 span {
  display: block;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.knowledge-compare-card p,
.knowledge-scenario-card p {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.6;
}

.knowledge-compare-card--safe {
  border-color: #cfe7d3;
  background: #f5fbf6;
}

.knowledge-compare-card--risk {
  border-color: #f3d4cf;
  background: #fff7f5;
}

.knowledge-checklist {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.knowledge-checklist__item {
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid #e4e8ef;
  background: #fbfcff;
  color: #334155;
  font-size: 15px;
  line-height: 1.6;
}

.knowledge-source-note {
  margin-top: 16px;
  color: #5f6368;
  font-size: 14px;
  line-height: 1.6;
}

@media (max-width: 640px) {
  .knowledge-page {
    padding: 24px 16px 40px;
    overflow-x: clip;
  }

  .knowledge-card {
    padding: 18px 18px;
    border-radius: 20px;
  }

  .knowledge-card ul {
    gap: 12px;
  }

  .knowledge-card ul li {
    min-height: 26px;
    padding-left: 36px;
  }

  .knowledge-card ul li::before {
    top: 4px;
    width: 20px;
    height: 20px;
  }

  .knowledge-card ul li::after {
    top: 10px;
    left: 6px;
    width: 6px;
    height: 3px;
  }

  .knowledge-header h1 {
    font-size: 34px;
  }

  .knowledge-header p {
    font-size: 16px;
  }

  .knowledge-compare-grid,
  .knowledge-scenario-grid,
  .knowledge-links {
    grid-template-columns: minmax(0, 1fr);
  }
}