@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
  --bg: #ffffff;
  --ink: #0b0b0f;
  --muted: #5a5f69;
  --line: #e6e8ee;
  --card: #ffffff;
  --shadow: 0 20px 50px rgba(15, 23, 42, 0.08);
  --accent: #2563eb;
  --accent-soft: #e8f0ff;
  --accent-deep: #1e40af;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Manrope", "Space Grotesk", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, #f8f9fb 0%, #ffffff 45%, #f7f8fa 100%);
}

main {
  position: relative;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  opacity: 0.5;
  z-index: 0;
  filter: blur(6px);
}

.orb.one {
  width: 280px;
  height: 280px;
  background: radial-gradient(circle at 30% 30%, #e1e4ea, transparent 65%);
  top: -120px;
  left: -40px;
}

.orb.two {
  width: 240px;
  height: 240px;
  background: radial-gradient(circle at 40% 40%, #e9edf3, transparent 65%);
  top: 80px;
  right: -70px;
}

.orb.three {
  width: 200px;
  height: 200px;
  background: radial-gradient(circle at 50% 50%, #e6e9ef, transparent 70%);
  bottom: 120px;
  right: 12%;
}

header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 1;
}

.logo {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: 20px;
  letter-spacing: 0.2px;
}

nav a {
  margin-left: 24px;
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
}

.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 72px 24px 56px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  border-radius: 999px;
  background: #f2f4f8;
  color: #2f343c;
  font-weight: 600;
  font-size: 14px;
  border: 1px solid #e6e8ee;
}

h1 {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(34px, 5vw, 56px);
  margin: 0 0 16px;
  line-height: 1.1;
}

p {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.cta {
  margin-top: 28px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn.primary {
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  color: #ffffff;
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.25);
}

.btn.secondary {
  border-color: #d9dde5;
  color: #1e40af;
  background: #ffffff;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.hero-card {
  background: var(--card);
  border-radius: 28px;
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid #e8ebf2;
  position: relative;
}

.hero-card::after {
  content: "";
  position: absolute;
  inset: 10px;
  border-radius: 20px;
  border: 1px dashed #dfe4ee;
  pointer-events: none;
}

.hero-card .metric {
  display: flex;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px dashed #e3e7ef;
  font-weight: 600;
}

.hero-card .metric:last-child {
  border-bottom: none;
}

.spark {
  margin-top: 20px;
  height: 140px;
  border-radius: 18px;
  background: linear-gradient(120deg, #f0f4ff, #ffffff);
  display: flex;
  align-items: flex-end;
  justify-content: space-around;
  padding: 20px;
}

.spark span {
  width: 18px;
  border-radius: 10px 10px 0 0;
  background: linear-gradient(180deg, #1e40af, #60a5fa);
  animation: rise 3s ease-in-out infinite;
}

.spark span:nth-child(2) {
  height: 60%;
  animation-delay: 0.2s;
}

.spark span:nth-child(3) {
  height: 80%;
  animation-delay: 0.4s;
}

.spark span:nth-child(4) {
  height: 50%;
  animation-delay: 0.6s;
}

.spark span:nth-child(5) {
  height: 90%;
  animation-delay: 0.8s;
}

@keyframes rise {
  0%,
  100% {
    transform: scaleY(1);
  }
  50% {
    transform: scaleY(1.1);
  }
}

.section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px 64px;
  position: relative;
  z-index: 1;
}

.section h2 {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(24px, 3vw, 36px);
  margin-bottom: 12px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.card {
  background: var(--card);
  border-radius: 20px;
  padding: 24px;
  border: 1px solid #e8ebf2;
  box-shadow: 0 14px 30px rgba(15, 23, 42, 0.06);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.step {
  background: #f7f8fa;
  border-radius: 18px;
  padding: 20px;
  border: 1px solid #e6e8ee;
}

.step span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
  margin-bottom: 12px;
}

.pricing {
  margin-top: 40px;
}

.pricing-title {
  margin: 0 0 8px;
  font-size: 22px;
}

.pricing-subtitle {
  margin: 0;
}

.pricing-grid {
  margin-top: 24px;
}

.pricing-card {
  display: grid;
  gap: 12px;
}

.plan-price {
  font-size: 28px;
  font-weight: 700;
  color: var(--ink);
}

.plan-list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.6;
}

.plan-list li {
  margin-bottom: 6px;
}

.cta-band {
  margin-top: 48px;
  padding: 32px;
  border-radius: 28px;
  background: linear-gradient(135deg, #111827, #1e3a8a);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.cta-band p {
  color: #c9ced8;
}

.stats {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.stat-card {
  background: var(--card);
  border-radius: 22px;
  padding: 20px;
  border: 1px solid #e8ebf2;
  display: grid;
  gap: 12px;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
}

.stat-card img {
  width: 100%;
  border-radius: 16px;
  border: 1px solid #e6e8ee;
}

.stat-card strong {
  font-size: 20px;
}

.badge {
  display: inline-flex;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-weight: 600;
  font-size: 13px;
  border: 1px solid #d7e3ff;
}

.paper-layout {
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 24px 80px;
  position: relative;
  z-index: 1;
}

.paper-hero {
  background: var(--card);
  border-radius: 28px;
  padding: 32px;
  box-shadow: var(--shadow);
  border: 1px solid #e8ebf2;
  display: grid;
  gap: 18px;
}

.paper-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
  font-size: 14px;
}

.paper-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}

.paper-grid .card {
  background: #f7f8fa;
}

.paper-chart {
  margin-top: 18px;
  width: 100%;
  border-radius: 20px;
  border: 1px solid #e6e8ee;
}

.faq-list {
  margin-top: 24px;
  display: grid;
  gap: 16px;
}

.faq-item {
  border: 1px solid #e8ebf2;
  border-radius: 18px;
  padding: 16px 20px;
  background: var(--card);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}

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

.faq-item[open] summary {
  color: var(--accent-deep);
}

.faq-item p {
  margin-top: 10px;
  color: var(--muted);
  font-size: 16px;
}

.disclaimer {
  padding-top: 0;
}

.disclaimer-card {
  margin-top: 20px;
  padding: 24px;
  border-radius: 20px;
  border: 1px solid #dbe4ff;
  background: linear-gradient(135deg, #f8fafc, #eef2ff);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
  display: grid;
  gap: 12px;
  position: relative;
}

.disclaimer-card::before {
  content: "重要事項";
  position: absolute;
  top: -12px;
  left: 20px;
  padding: 4px 10px;
  border-radius: 999px;
  background: #1e40af;
  color: #ffffff;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.4px;
  box-shadow: 0 10px 22px rgba(30, 64, 175, 0.25);
}

.disclaimer-card p {
  margin: 0;
  font-size: 16px;
  color: #475569;
  line-height: 1.7;
}

footer {
  text-align: center;
  padding: 32px 24px 48px;
  color: var(--muted);
  font-size: 14px;
}

footer .footer-links {
  margin-bottom: 8px;
  display: flex;
  justify-content: center;
  gap: 16px;
}

footer a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
}

footer a:hover {
  color: var(--accent-deep);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 720px) {
  nav {
    display: none;
  }

  .hero {
    padding-top: 40px;
  }

  .cta-band {
    flex-direction: column;
    align-items: flex-start;
  }
}