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

:root {
  --bg-main: #07111f;
  --bg-top: #112848;
  --bg-card: rgba(10, 20, 40, 0.82);
  --bg-card-2: rgba(18, 34, 62, 0.86);
  --line: rgba(122, 199, 255, 0.16);
  --line-strong: rgba(122, 199, 255, 0.28);
  --accent: #7dc9ff;
  --accent-2: #8ef0e2;
  --accent-deep: #163a63;
  --text: #f5f9ff;
  --muted: #d9e8ff;
  --soft: #8ea9c8;
  --shadow: 0 18px 42px rgba(0, 0, 0, 0.34);
  --shadow-soft: 0 12px 28px rgba(4, 14, 28, 0.3);
  --radius-xl: 28px;
  --radius-lg: 22px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top center, rgba(142, 240, 226, 0.13), transparent 20%),
    radial-gradient(circle at 50% -10%, rgba(125, 201, 255, 0.18), transparent 28%),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg-main) 55%, #050c16 100%);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.5), rgba(0,0,0,0));
  opacity: .22;
}

.container {
  width: 100%;
  max-width: 430px;
  margin: 0 auto;
  padding: 20px 14px 120px;
}

.hero {
  text-align: center;
  padding: 18px 10px 8px;
  margin-bottom: 14px;
}

.hero h1 {
  font-size: 1.95rem;
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: 0.3px;
  margin-bottom: 18px;
  color: var(--text);
  text-shadow: 0 0 24px rgba(125, 201, 255, 0.18);
}

.hero h1::after {
  content: "";
  display: block;
  width: 84px;
  height: 4px;
  margin: 14px auto 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 16px rgba(125, 201, 255, 0.28);
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin: 0 0 16px;
}

.pill {
  min-width: 148px;
  padding: 14px 20px;
  border-radius: 16px;
  border: 1px solid rgba(142, 240, 226, 0.22);
  background: linear-gradient(180deg, rgba(142, 240, 226, 0.96) 0%, rgba(125, 201, 255, 0.96) 100%);
  color: #06233f;
  text-decoration: none;
  font-weight: 900;
  font-size: 0.96rem;
  text-align: center;
  box-shadow: 0 10px 24px rgba(77, 177, 214, 0.24);
  transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
}

.pill:hover,
.pill:active {
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(77, 177, 214, 0.28);
  filter: saturate(1.05);
}

.tagline {
  margin-top: 12px;
  display: inline-block;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(14, 29, 54, 0.78);
  color: #dff6ff;
  font-size: 0.81rem;
  font-weight: 700;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.02);
}

.notice,
.section {
  position: relative;
  overflow: hidden;
}

.notice::before,
.section::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(255,255,255,0.045), transparent 35%, transparent 65%, rgba(125, 201, 255, 0.04));
}

.notice {
  background: linear-gradient(180deg, rgba(18, 34, 62, 0.84), rgba(10, 20, 40, 0.9));
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  padding: 16px 17px;
  margin-bottom: 24px;
  color: #e5f5ff;
  font-size: 0.89rem;
  line-height: 1.75;
  box-shadow: var(--shadow-soft);
}

.section {
  margin-top: 20px;
  background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-card-2) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: 22px 18px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.section h2 {
  color: #ffffff;
  font-size: 1.24rem;
  margin-bottom: 14px;
  line-height: 1.35;
}

.section p {
  color: var(--muted);
  line-height: 1.95;
  font-size: 0.96rem;
  margin-bottom: 12px;
}

.section ul {
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.95;
}

.section li::marker {
  color: var(--accent-2);
}

.footer {
  margin-top: 24px;
  text-align: center;
  color: var(--soft);
  font-size: 0.84rem;
  line-height: 1.75;
  padding-bottom: 8px;
}

.floating-btn-wrap {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  width: calc(100% - 28px);
  max-width: 402px;
  z-index: 9999;
  pointer-events: none;
}

.floating-btn {
  width: 100%;
  border: 1px solid rgba(142, 240, 226, 0.18);
  border-radius: 18px;
  padding: 16px 20px;
  font-size: 1rem;
  font-weight: 900;
  color: #06233f;
  background: linear-gradient(180deg, rgba(142, 240, 226, 0.98) 0%, rgba(125, 201, 255, 0.98) 100%);
  box-shadow:
    0 14px 28px rgba(41, 119, 156, 0.28),
    0 0 22px rgba(125, 201, 255, 0.14);
  cursor: pointer;
  pointer-events: auto;
  transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
}

.floating-btn:hover,
.floating-btn:active {
  transform: translateY(-1px);
  box-shadow:
    0 16px 30px rgba(41, 119, 156, 0.32),
    0 0 26px rgba(125, 201, 255, 0.18);
  filter: saturate(1.05);
}

@media (max-width: 360px) {
  .container {
    padding-left: 12px;
    padding-right: 12px;
  }

  .hero h1 {
    font-size: 1.7rem;
  }

  .pill {
    min-width: 136px;
    padding: 13px 14px;
    font-size: 0.92rem;
  }

  .tagline {
    font-size: 0.76rem;
    padding: 8px 12px;
  }

  .section {
    padding: 20px 16px;
  }
}