:root {
  color-scheme: light;
  --ink: #111113;
  --muted: #6e6e73;
  --soft: #f5f5f7;
  --panel: rgba(255, 255, 255, 0.78);
  --line: rgba(0, 0, 0, 0.1);
  --blue: #0071e3;
  --blue-dark: #005bbf;
  --green: #27a367;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 50% -10%, rgba(0, 113, 227, 0.12), transparent 34rem),
    linear-gradient(180deg, #fbfbfd 0%, #f5f5f7 56%, #ffffff 100%);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Hiragino Sans GB", sans-serif;
  letter-spacing: 0;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  width: min(1120px, calc(100% - 32px));
  margin: 14px auto 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 10px 34px rgba(0, 0, 0, 0.05);
  backdrop-filter: blur(22px) saturate(1.3);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
}

.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  color: #fff;
  background:
    radial-gradient(circle at 34% 28%, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.08) 19%, transparent 20%),
    linear-gradient(145deg, #111113, #2c2c2e 58%, #0071e3);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.2),
    0 10px 24px rgba(0, 113, 227, 0.22);
}

.brand-orbit {
  position: absolute;
  width: 20px;
  height: 13px;
  border: 2px solid rgba(255, 255, 255, 0.9);
  border-top-color: transparent;
  border-left-color: transparent;
  border-radius: 50%;
  transform: rotate(-26deg);
}

.brand-star {
  position: absolute;
  right: 8px;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.9);
}

.brand-mark::after {
  content: "";
  position: absolute;
  left: 9px;
  bottom: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.82);
}

.brand strong,
.brand small {
  display: block;
  white-space: nowrap;
}

.brand strong {
  font-size: 16px;
  font-weight: 700;
}

.brand small {
  margin-top: 1px;
  color: var(--muted);
  font-size: 12px;
}

.nav-links {
  display: flex;
  gap: 6px;
}

.nav-links a {
  padding: 8px 12px;
  border-radius: 999px;
  color: #424245;
  font-size: 14px;
}

.nav-links a:hover {
  background: rgba(0, 0, 0, 0.05);
}

.header-action,
.primary-button,
.secondary-button,
.price-row a,
.plan-card a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 999px;
  font-weight: 600;
  transition:
    transform 180ms ease,
    background 180ms ease,
    box-shadow 180ms ease;
}

.header-action,
.primary-button,
.price-row a,
.plan-card a {
  color: #fff;
  background: var(--blue);
}

.header-action {
  justify-self: end;
  min-height: 38px;
  padding: 0 16px;
  font-size: 14px;
}

.primary-button {
  padding: 0 24px;
  box-shadow: 0 16px 38px rgba(0, 113, 227, 0.24);
}

.secondary-button {
  padding: 0 22px;
  color: var(--blue);
  background: rgba(0, 113, 227, 0.09);
}

.text-button {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: #1d1d1f;
  font-weight: 600;
}

.text-button::after {
  content: ">";
  margin-left: 6px;
  color: var(--blue);
}

.header-action:hover,
.primary-button:hover,
.price-row a:hover,
.plan-card a:hover {
  background: var(--blue-dark);
  transform: translateY(-1px);
}

.secondary-button:hover {
  background: rgba(0, 113, 227, 0.14);
  transform: translateY(-1px);
}

.hero {
  width: min(1120px, calc(100% - 32px));
  min-height: calc(100vh - 74px);
  margin: 0 auto;
  padding: 118px 0 82px;
  text-align: center;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 920px;
  margin: 0 auto 24px;
  font-size: clamp(46px, 7vw, 88px);
  line-height: 1.02;
  font-weight: 700;
}

.hero-lede {
  max-width: 760px;
  margin: 0 auto;
  color: var(--muted);
  font-size: clamp(19px, 2.3vw, 26px);
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin: 34px 0 42px;
}

.quick-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  max-width: 850px;
  margin: 0 auto;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--line);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.quick-facts div {
  padding: 24px 18px;
  background: rgba(255, 255, 255, 0.8);
}

.quick-facts dt {
  color: var(--muted);
  font-size: 13px;
}

.quick-facts dd {
  margin: 8px 0 0;
  font-size: 20px;
  font-weight: 700;
}

.section {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 84px 0;
}

.section-heading {
  max-width: 760px;
  margin: 0 auto 34px;
  text-align: center;
}

.section-heading h2,
.guarantee h2 {
  margin-bottom: 14px;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.08;
  font-weight: 700;
}

.section-heading p,
.guarantee p {
  color: var(--muted);
  font-size: 19px;
  line-height: 1.65;
}

.price-section {
  width: 100%;
  padding-right: max(16px, calc((100% - 1120px) / 2));
  padding-left: max(16px, calc((100% - 1120px) / 2));
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.seo-intro {
  padding-top: 40px;
}

.benefit-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.benefit-grid article {
  min-height: 190px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 14px 38px rgba(0, 0, 0, 0.04);
}

.benefit-grid h3 {
  margin-bottom: 10px;
  font-size: 24px;
}

.benefit-grid p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.65;
}

.topic-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  max-width: 920px;
  margin: 28px auto 0;
}

.topic-links a,
.inline-links a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid rgba(0, 113, 227, 0.18);
  border-radius: 999px;
  color: var(--blue);
  background: rgba(0, 113, 227, 0.06);
  font-weight: 600;
}

.page-hero {
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
  padding: 96px 0 56px;
  text-align: center;
}

.page-hero h1 {
  max-width: 900px;
  font-size: clamp(42px, 6vw, 72px);
}

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

.content-card,
.article-card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 14px 38px rgba(0, 0, 0, 0.04);
}

.content-card h2,
.article-card h2 {
  margin-bottom: 12px;
  font-size: 30px;
}

.content-card p,
.article-card p,
.content-card li {
  color: var(--muted);
  line-height: 1.7;
}

.content-card ul {
  margin: 0;
  padding-left: 20px;
}

.inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.price-table {
  display: grid;
  gap: 10px;
}

.price-row {
  display: grid;
  grid-template-columns: 1.12fr 0.72fr 0.78fr 0.86fr 1.18fr 126px;
  align-items: center;
  gap: 18px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 14px 38px rgba(0, 0, 0, 0.04);
}

.price-head {
  padding-top: 0;
  padding-bottom: 0;
  border: 0;
  color: var(--muted);
  background: transparent;
  box-shadow: none;
  font-size: 13px;
  font-weight: 700;
}

.price-row.featured {
  border-color: rgba(0, 113, 227, 0.34);
  background: linear-gradient(180deg, rgba(0, 113, 227, 0.06), #fff 58%);
}

.price-row b,
.price-row small {
  display: block;
}

.price-row b {
  margin-bottom: 4px;
  font-size: 20px;
}

.price-row small {
  color: var(--muted);
  font-size: 13px;
}

.price-row span:nth-child(2),
.final-price {
  font-size: 22px;
  font-weight: 700;
}

.price-row span:nth-child(3),
.price-row span:nth-child(5) {
  color: #424245;
  line-height: 1.55;
}

.final-price {
  color: var(--blue);
}

.price-row a {
  min-height: 40px;
  font-size: 14px;
}

.source-note {
  max-width: 920px;
  margin: 18px auto 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
  text-align: center;
}

.source-note a {
  color: var(--blue);
  font-weight: 600;
}

.compare-section {
  padding-top: 56px;
}

.compare-table {
  display: grid;
  gap: 10px;
}

.compare-row {
  display: grid;
  grid-template-columns: 1fr 0.85fr 1fr 0.8fr 1.25fr;
  align-items: center;
  gap: 18px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.78);
}

.compare-head {
  padding-top: 0;
  padding-bottom: 0;
  border: 0;
  color: var(--muted);
  background: transparent;
  font-size: 13px;
  font-weight: 700;
}

.compare-row.recommended {
  border-color: rgba(0, 113, 227, 0.3);
  background: rgba(0, 113, 227, 0.06);
}

.compare-row span:first-child {
  font-weight: 700;
}

.plans-section {
  padding-bottom: 56px;
}

.plans-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.plan-card {
  display: flex;
  flex-direction: column;
  min-height: 310px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.84);
  box-shadow: var(--shadow);
}

.plan-card.featured {
  background: #111113;
  color: #fff;
}

.plan-card.featured p {
  color: rgba(255, 255, 255, 0.72);
}

.plan-card.featured .plan-badge {
  color: #fff;
  background: rgba(255, 255, 255, 0.16);
}

.plan-badge {
  align-self: flex-start;
  margin-bottom: 26px;
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--blue);
  background: rgba(0, 113, 227, 0.1);
  font-size: 13px;
  font-weight: 700;
}

.plan-card h3 {
  margin-bottom: 14px;
  font-size: 27px;
  line-height: 1.18;
}

.plan-card p {
  color: var(--muted);
  line-height: 1.65;
}

.plan-card a {
  margin-top: auto;
}

.process-section {
  padding-top: 56px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.step {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.72);
}

.step span {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 24px;
  border-radius: 50%;
  color: #fff;
  background: #111113;
  font-size: 13px;
  font-weight: 700;
}

.step h3 {
  margin-bottom: 8px;
  font-size: 23px;
}

.step p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.65;
}

.faq-section {
  padding-top: 56px;
}

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 900px;
  margin: 0 auto;
}

.faq-list details {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.78);
  overflow: hidden;
}

.faq-list summary {
  cursor: pointer;
  padding: 20px 22px;
  font-size: 19px;
  font-weight: 700;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list p {
  margin: 0;
  padding: 0 22px 22px;
  color: var(--muted);
  line-height: 1.65;
}

.guarantee {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 34px;
  padding: 42px;
  border-radius: 32px;
  color: #fff;
  background:
    linear-gradient(135deg, rgba(0, 113, 227, 0.36), transparent 46%),
    #111113;
  box-shadow: var(--shadow);
}

.guarantee p {
  max-width: 760px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.74);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 10px 0 42px;
  color: var(--muted);
  font-size: 14px;
}

.site-footer p {
  margin-bottom: 0;
}

.site-footer a {
  color: var(--blue);
  font-weight: 600;
}

@media (max-width: 920px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .nav-links {
    display: none;
  }

  .quick-facts,
  .benefit-grid,
  .content-grid,
  .plans-grid,
  .steps {
    grid-template-columns: 1fr;
  }

  .price-row,
  .compare-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .price-head,
  .compare-head {
    display: none;
  }
}

@media (max-width: 640px) {
  .site-header {
    width: calc(100% - 20px);
    margin-top: 10px;
    padding: 8px;
  }

  .brand small {
    display: none;
  }

  .brand strong {
    font-size: 15px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
    font-size: 17px;
  }

  .header-action {
    min-height: 36px;
    padding: 0 12px;
    font-size: 13px;
  }

  .hero,
  .page-hero,
  .section,
  .site-footer {
    width: calc(100% - 20px);
  }

  .hero {
    min-height: auto;
    padding: 82px 0 60px;
  }

  .hero-lede,
  .section-heading p,
  .guarantee p {
    font-size: 16px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .quick-facts {
    border-radius: 22px;
  }

  .quick-facts div {
    padding: 20px 16px;
  }

  .price-section {
    width: 100%;
  }

  .price-row,
  .plan-card,
  .step {
    border-radius: 22px;
  }

  .guarantee {
    align-items: stretch;
    flex-direction: column;
    padding: 28px;
    border-radius: 26px;
  }

  .site-footer {
    flex-direction: column;
  }
}