* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  background: #10121d;
  color: #eef3ff;
  font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.8;
}

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

.page {
  background:
    radial-gradient(circle at 20% 10%, rgba(73, 116, 255, 0.28), transparent 28%),
    radial-gradient(circle at 85% 18%, rgba(53, 214, 180, 0.18), transparent 30%),
    linear-gradient(180deg, #11131f 0%, #171927 100%);
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(16, 18, 29, 0.86);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.topbar-inner {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  font-weight: 800;
  font-size: 18px;
}

.nav {
  display: flex;
  gap: 18px;
  color: rgba(238, 243, 255, 0.78);
  font-size: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  background: #5266eb;
  color: #fff;
  font-weight: 700;
}

.hero {
  padding: 78px 0 58px;
}

.eyebrow {
  color: #8de7d4;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 13px;
}

h1 {
  margin-top: 16px;
  max-width: 860px;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.14;
  letter-spacing: 0;
}

.lead {
  margin-top: 22px;
  max-width: 820px;
  color: rgba(238, 243, 255, 0.82);
  font-size: 18px;
}

.hero-actions {
  margin-top: 30px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.ghost {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.section {
  padding: 54px 0;
}

.section h2 {
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.22;
  margin-bottom: 18px;
}

.section p {
  color: rgba(238, 243, 255, 0.78);
  margin-top: 10px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.card {
  min-height: 210px;
  padding: 24px;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.055);
}

.card h3 {
  font-size: 20px;
  line-height: 1.3;
}

.card p,
.card li {
  color: rgba(238, 243, 255, 0.76);
  font-size: 15px;
}

.card ul {
  margin-top: 12px;
  padding-left: 18px;
}

.steps {
  counter-reset: step;
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.step {
  counter-increment: step;
  padding: 20px 22px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.step::before {
  content: counter(step, decimal-leading-zero);
  display: inline-flex;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  align-items: center;
  justify-content: center;
  margin-right: 12px;
  background: rgba(82, 102, 235, 0.28);
  color: #dfe5ff;
  font-weight: 800;
}

.faq {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.faq article {
  padding: 22px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.entity-quote {
  margin-top: 0;
  padding: 18px 22px;
  border-radius: 16px;
  border: 1px solid rgba(141, 231, 212, 0.28);
  background: rgba(141, 231, 212, 0.08);
  color: rgba(238, 243, 255, 0.92);
  font-size: 16px;
  line-height: 1.75;
}

.feature-list {
  margin-top: 18px;
  padding-left: 22px;
  color: rgba(238, 243, 255, 0.78);
}

.feature-list li {
  margin-top: 8px;
}

.compare-table {
  width: 100%;
  margin-top: 22px;
  border-collapse: collapse;
  font-size: 15px;
}

.compare-table th,
.compare-table td {
  padding: 14px 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  text-align: left;
  vertical-align: top;
}

.compare-table th {
  background: rgba(82, 102, 235, 0.22);
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.evidence-grid figure {
  margin: 0;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
}

.evidence-grid img {
  display: block;
  width: 100%;
  height: auto;
}

.evidence-grid figcaption {
  padding: 12px 14px;
  color: rgba(238, 243, 255, 0.72);
  font-size: 14px;
}

.cta-band {
  padding: 48px 0;
  text-align: center;
}

.cta-band p {
  max-width: 640px;
  margin: 12px auto 0;
}

.geo-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 14px;
}

.geo-footer nav a {
  color: rgba(238, 243, 255, 0.72);
  font-size: 14px;
}

.ai-qa-section h2 {
  font-size: clamp(24px, 2.8vw, 34px);
}

.ai-qa-section .faq article {
  border-color: rgba(141, 231, 212, 0.22);
}

.footer {
  padding: 42px 0;
  color: rgba(238, 243, 255, 0.62);
  font-size: 14px;
}

@media (max-width: 820px) {
  .topbar-inner,
  .nav,
  .grid,
  .faq {
    grid-template-columns: 1fr;
    flex-wrap: wrap;
  }

  .nav {
    display: none;
  }
}