:root {
  --text: #10233d;
  --text-soft: #5f7897;
  --primary: #1f77df;
  --primary-strong: #0f5ec7;
  --shadow-lg: 0 28px 80px rgba(38, 96, 168, 0.12);
  --shadow-md: 0 18px 42px rgba(38, 96, 168, 0.09);
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  color: var(--text);
  font-family: "Avenir Next", "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at 12% 10%, rgba(79, 169, 255, 0.16), transparent 26%),
    radial-gradient(circle at 88% 8%, rgba(31, 119, 223, 0.12), transparent 22%),
    linear-gradient(180deg, #f8fcff 0%, #eef7ff 48%, #f7fbff 100%);
}

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

.site-shell {
  position: relative;
  z-index: 1;
}

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

.topbar {
  position: absolute;
  inset: 0 0 auto 0;
  padding: 18px 0 0;
  z-index: 4;
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 52px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-logo {
  display: block;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
}

.brand-title {
  color: white;
  font-size: 30px;
  line-height: 1;
  font-weight: 900;
  letter-spacing: -0.05em;
  text-shadow: 0 10px 24px rgba(4, 32, 82, 0.18);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 16px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease, border-color 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  color: white;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-strong) 100%);
  box-shadow: 0 16px 34px rgba(31, 119, 223, 0.24);
}

.button-secondary {
  color: var(--primary);
  background: white;
  border-color: rgba(31, 119, 223, 0.14);
  box-shadow: 0 10px 24px rgba(31, 119, 223, 0.08);
}

.topbar .button {
  min-height: 44px;
  padding: 0 18px;
  border-radius: 14px;
  box-shadow: 0 12px 26px rgba(31, 119, 223, 0.16);
}

.hero {
  position: relative;
  min-height: 620px;
  padding: 118px 0 64px;
  overflow: hidden;
  isolation: isolate;
  background: linear-gradient(130deg, #0a4fa7 0%, #0d66d0 36%, #1184f2 72%, #0e62c4 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 16% 26%, rgba(255, 255, 255, 0.16), transparent 18%),
    radial-gradient(circle at 78% 22%, rgba(143, 225, 255, 0.24), transparent 20%),
    radial-gradient(circle at 68% 72%, rgba(255, 255, 255, 0.08), transparent 18%),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08), transparent 34%, transparent 68%, rgba(255, 255, 255, 0.04));
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.16), rgba(0, 0, 0, 0.72) 38%, rgba(0, 0, 0, 0.72) 72%, rgba(0, 0, 0, 0.22));
  opacity: 0.34;
  pointer-events: none;
}

.hero-shell {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  min-height: 460px;
}

.hero-shell::after {
  content: "$499";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255, 255, 255, 0.12);
  font-size: min(23vw, 300px);
  font-weight: 900;
  line-height: 0.82;
  letter-spacing: -0.1em;
  text-shadow: 0 18px 40px rgba(5, 44, 104, 0.12);
  pointer-events: none;
}

.hero-copy {
  position: relative;
  max-width: 660px;
  z-index: 1;
}

.hero h1 {
  margin: 0;
  font-size: clamp(42px, 6vw, 74px);
  line-height: 1.06;
  letter-spacing: -0.05em;
  color: white;
}

.hero h1 span {
  display: block;
  margin-top: 6px;
  color: rgba(255, 255, 255, 0.92);
}

.hero-price-inline {
  display: inline-block;
  margin: 18px 0 18px;
  padding: 14px 22px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(226, 242, 255, 0.94));
  color: #0d63ce;
  font-size: clamp(48px, 7vw, 78px);
  line-height: 0.92;
  font-weight: 800;
  letter-spacing: -0.06em;
  box-shadow: 0 24px 44px rgba(4, 32, 82, 0.18);
}

.hero-lead {
  margin: 0;
  display: block;
  color: #f5d68a;
  font-size: 24px;
  line-height: 1.3;
  font-weight: 700;
  text-shadow: 0 10px 24px rgba(118, 77, 2, 0.14);
}

.section {
  padding: 34px 0 42px;
}

.section-header {
  margin-bottom: 24px;
}

.section-title {
  margin: 0;
  font-size: clamp(32px, 4vw, 48px);
  letter-spacing: -0.05em;
}

.section-copy {
  max-width: none;
  margin: 12px 0 0;
  color: var(--text-soft);
  font-size: 17px;
  line-height: 1.8;
}

.comparison-shell,
.faq-shell {
  padding: 34px;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(244, 250, 255, 0.96));
  border: 1px solid rgba(31, 119, 223, 0.1);
  box-shadow: var(--shadow-lg);
}

.comparison-wrap {
  overflow: hidden;
  border-radius: 24px;
  border: 1px solid rgba(31, 119, 223, 0.1);
  background: white;
}

.comparison {
  width: 100%;
  border-collapse: collapse;
}

.comparison th,
.comparison td {
  padding: 22px 20px;
  text-align: left;
  vertical-align: middle;
  border-bottom: 1px solid rgba(31, 119, 223, 0.08);
}

.comparison th {
  background: #f1f8ff;
  color: #2d527e;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.comparison tr:last-child td {
  border-bottom: 0;
}

.comparison td:first-child,
.comparison th:first-child {
  width: 18%;
  font-weight: 800;
}

.comparison td:nth-child(3),
.comparison th:nth-child(3) {
  background: linear-gradient(180deg, rgba(220, 238, 255, 0.54), rgba(244, 250, 255, 0.82));
}

.tag-good {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 0 12px;
  margin-right: 8px;
  border-radius: 999px;
  color: white;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.04em;
  background: linear-gradient(135deg, #24b685, #0f9d6f);
}

.faq-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 24px;
}

.faq-side,
.faq-list {
  height: 100%;
  padding: 30px;
  border-radius: 22px;
  background: white;
  border: 1px solid rgba(31, 119, 223, 0.1);
  box-shadow: var(--shadow-md);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid rgba(31, 119, 223, 0.12);
  background: rgba(238, 247, 255, 0.9);
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.faq-side p {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.8;
}

.faq-side-title {
  margin: 18px 0 12px;
  font-size: 34px;
  letter-spacing: -0.05em;
}

.contact-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 24px 0 0;
  padding: 20px 22px;
  border-radius: 18px;
  background: linear-gradient(135deg, #eef7ff, #f7fbff);
  border: 1px solid rgba(31, 119, 223, 0.1);
}

.contact-banner strong {
  display: block;
  margin-bottom: 6px;
  font-size: 24px;
  color: #0f5ec7;
}

.contact-banner span {
  color: var(--text-soft);
  font-size: 15px;
}

.faq-side .button {
  width: 100%;
  margin-top: 22px;
}

details {
  border-bottom: 1px solid rgba(31, 119, 223, 0.1);
}

details:last-child {
  border-bottom: 0;
}

summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
  cursor: pointer;
  list-style: none;
  font-size: 17px;
  font-weight: 800;
  color: #163153;
}

summary::-webkit-details-marker {
  display: none;
}

.summary-icon {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  border-radius: 50%;
  border: 1px solid rgba(31, 119, 223, 0.14);
  background: #eef7ff;
  color: var(--primary);
  font-size: 18px;
  transition: transform 180ms ease;
}

details[open] .summary-icon {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 0 20px;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.82;
}

.footer {
  padding: 26px 0 48px;
  color: #6e88a7;
  font-size: 14px;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  animation: rise 640ms ease forwards;
}

.reveal-delay-1 { animation-delay: 90ms; }
.reveal-delay-2 { animation-delay: 180ms; }
.reveal-delay-3 { animation-delay: 270ms; }

@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1024px) {
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 112px;
  }
}

@media (max-width: 768px) {
  .container {
    width: min(calc(100% - 24px), var(--container));
  }

  .topbar {
    padding-top: 14px;
  }

  .topbar-inner {
    min-height: 48px;
    padding-bottom: 8px;
  }

  .brand-title {
    font-size: 24px;
  }

  .brand-logo {
    width: 36px;
    height: 36px;
  }

  .hero {
    min-height: auto;
    padding: 94px 0 34px;
  }

  .hero-shell,
  .comparison-shell,
  .faq-shell,
  .faq-side,
  .faq-list {
    padding: 22px;
    border-radius: 20px;
  }

  .hero h1 {
    font-size: clamp(38px, 12vw, 56px);
  }

  .hero-shell::after {
    right: -8px;
    font-size: min(34vw, 180px);
  }

  .hero-lead,
  .section-copy {
    font-size: 16px;
  }

  .hero-price-inline {
    font-size: clamp(44px, 12vw, 64px);
  }

  .comparison-shell {
    overflow: hidden;
  }

  .comparison-wrap {
    overflow-x: auto;
  }

  .comparison {
    min-width: 720px;
  }

  .contact-banner {
    align-items: start;
    flex-direction: column;
  }
}