* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: linear-gradient(180deg, #06101d 0%, #081426 100%);
  color: #eef5ff;
  line-height: 1.7;
}

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

nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(4, 12, 24, 0.55);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 18px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  object-fit: cover;
  display: block;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.brand {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
}

.nav-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
}

.nav-links a {
  color: rgba(238, 245, 255, 0.92);
  font-size: 15px;
}

.nav-links a.active {
  color: #ffffff;
  font-weight: 700;
}

.nav-download {
  padding: 12px 22px;
  border-radius: 999px;
  background: linear-gradient(180deg, #a9d2ff 0%, #7ab7f4 100%);
  color: #0a1830;
  font-weight: 700;
}

.home-main,
.page-main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 28px 80px;
}

.hero-image {
  min-height: 860px;
  border-radius: 0 0 28px 28px;
  overflow: hidden;
  background:
    linear-gradient(rgba(4, 12, 24, 0.12), rgba(4, 12, 24, 0.36)),
    url("hero-bg.png") center center / cover no-repeat;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
}

.hero-overlay {
  min-height: 860px;
  padding: 120px 64px 90px;
  display: flex;
  align-items: flex-start;
}

.hero-left {
  max-width: 620px;
}

.hero-left h1 {
  margin: 0 0 24px;
  font-size: 78px;
  line-height: 1.08;
  letter-spacing: 1px;
  color: #ffffff;
  text-shadow: 0 8px 30px rgba(0, 0, 0, 0.28);
}

.hero-left p {
  margin: 0;
  font-size: 20px;
  line-height: 1.8;
  color: rgba(245, 250, 255, 0.94);
  text-shadow: 0 4px 16px rgba(0, 0, 0, 0.24);
}

.hero-actions {
  margin-top: 34px;
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.button {
  display: inline-block;
  padding: 16px 34px;
  border-radius: 999px;
  font-size: 17px;
  font-weight: 700;
  transition: 0.2s ease;
}

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

.button.primary {
  background: linear-gradient(180deg, #a9d2ff 0%, #78b5f2 100%);
  color: #0b1830;
  box-shadow: 0 12px 28px rgba(73, 128, 190, 0.30);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.05);
  color: #f4f8ff;
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(10px);
}

.button.gold {
  background: linear-gradient(180deg, #f4d78d 0%, #ddb25a 100%);
  color: #2f2107;
  width: 100%;
  text-align: center;
}

.hero-tags {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  color: rgba(238, 245, 255, 0.9);
  font-size: 16px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
}

.stats-row {
  margin: -72px auto 0;
  max-width: 1120px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  position: relative;
  z-index: 5;
}

.stat-card {
  padding: 26px 20px;
  text-align: center;
  border-radius: 24px;
  background: rgba(134, 166, 210, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.10);
  backdrop-filter: blur(14px);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.24);
}

.stat-big {
  font-size: 28px;
  font-weight: 800;
  color: #ffffff;
}

.stat-small {
  margin-top: 8px;
  font-size: 16px;
  color: rgba(235, 243, 255, 0.84);
}

.card,
.membership-card {
  margin-top: 28px;
  padding: 28px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.22);
  backdrop-filter: blur(14px);
}

.intro-card {
  margin-top: 34px;
  text-align: center;
}

.intro-card h2 {
  margin: 0 0 10px;
  font-size: 44px;
}

.intro-card p {
  margin: 0;
  font-size: 20px;
  color: rgba(235, 243, 255, 0.82);
}

.feature-grid {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.feature-card h3 {
  margin: 16px 0 10px;
  font-size: 28px;
}

.feature-card p {
  margin: 0;
  color: rgba(235, 243, 255, 0.82);
}

.feature-no {
  width: 42px;
  height: 42px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  background: rgba(127, 176, 229, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.10);
  color: #dcecff;
}

.membership-card {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 24px;
  align-items: center;
  background:
    radial-gradient(circle at left center, rgba(76, 119, 177, 0.20), transparent 35%),
    rgba(255, 255, 255, 0.05);
}

.membership-left h2 {
  margin: 0 0 12px;
  font-size: 38px;
}

.membership-left p {
  margin: 0;
  font-size: 18px;
  color: rgba(235, 243, 255, 0.82);
}

.membership-tags {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.membership-tags span {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: #dcecff;
  font-size: 14px;
}

.membership-right {
  padding: 22px;
  border-radius: 22px;
  background: rgba(8, 21, 40, 0.42);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.price {
  font-size: 56px;
  font-weight: 800;
  color: #ffe8a8;
  line-height: 1;
}

.price span {
  font-size: 24px;
  font-weight: 600;
  color: rgba(255, 236, 180, 0.9);
}

.price-note {
  margin: 14px 0 20px;
  color: rgba(236, 243, 255, 0.74);
}

.bottom-links h2 {
  margin-top: 0;
}

.quick-links {
  display: grid;
  gap: 14px;
}

.quick-links a {
  display: block;
  padding: 16px 18px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #dcecff;
}

.page-hero {
  padding-top: 56px;
  max-width: 900px;
}

.page-hero h1 {
  margin: 0 0 16px;
  font-size: 48px;
  color: #ffffff;
}

.page-hero p {
  margin: 0;
  font-size: 18px;
  color: rgba(235, 243, 255, 0.82);
}

footer {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 28px 44px;
  color: rgba(235, 243, 255, 0.56);
  font-size: 14px;
}

@media (max-width: 1100px) {
  .hero-left h1 {
    font-size: 58px;
  }

  .stats-row,
  .feature-grid,
  .membership-card {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 820px) {
  .nav-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-links {
    gap: 12px;
  }

  .hero-image,
  .hero-overlay {
    min-height: auto;
  }

  .hero-overlay {
    padding: 80px 28px 70px;
  }

  .hero-left h1,
  .page-hero h1 {
    font-size: 42px;
  }

  .hero-left p,
  .page-hero p {
    font-size: 17px;
  }

  .stats-row,
  .feature-grid,
  .membership-card {
    grid-template-columns: 1fr;
  }

  .intro-card h2 {
    font-size: 32px;
  }
}