:root {
  --bg-1: #0c1024;
  --bg-2: #1b1148;
  --bg-3: #08234a;
  --text: #f4f6ff;
  --text-soft: rgba(244, 246, 255, 0.72);
  --text-mute: rgba(244, 246, 255, 0.55);
  --glass-bg: rgba(255, 255, 255, 0.10);
  --glass-bg-strong: rgba(255, 255, 255, 0.16);
  --glass-border: rgba(255, 255, 255, 0.22);
  --glass-shadow: 0 20px 60px rgba(8, 12, 35, 0.45),
                  inset 0 1px 0 rgba(255, 255, 255, 0.18);
  --primary: #0a84ff;
  --primary-2: #5ac8fa;
  --primary-glow: 0 12px 32px rgba(10, 132, 255, 0.45);
  --warn: #ffd166;
  --radius-lg: 22px;
  --radius-md: 14px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Helvetica Neue", "Microsoft YaHei", "Source Han Sans CN",
    "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 800px at 10% -10%, #2a2070 0%, transparent 60%),
    radial-gradient(1000px 700px at 110% 10%, #0b4ea8 0%, transparent 55%),
    radial-gradient(900px 600px at 50% 120%, #00b3a4 0%, transparent 60%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-2) 50%, var(--bg-3) 100%);
  background-attachment: fixed;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.bg-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
  pointer-events: none;
  z-index: 0;
  animation: float 18s ease-in-out infinite alternate;
}
.orb-a { width: 520px; height: 520px; top: -160px; left: -120px;
  background: radial-gradient(circle, #6c5ce7, transparent 65%); }
.orb-b { width: 440px; height: 440px; top: 30%; right: -120px;
  background: radial-gradient(circle, #00b3a4, transparent 65%);
  animation-duration: 22s; }
.orb-c { width: 480px; height: 480px; bottom: -180px; left: 30%;
  background: radial-gradient(circle, #ff6b9a, transparent 65%);
  animation-duration: 26s; }

@keyframes float {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  100% { transform: translate3d(40px, -30px, 0) scale(1.08); }
}

.bg-grain {
  position: fixed; inset: 0;
  background-image:
    radial-gradient(rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 3px 3px;
  opacity: 0.25;
  mix-blend-mode: overlay;
  pointer-events: none;
  z-index: 0;
}

.page {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 24px 48px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
  box-shadow: var(--glass-shadow);
}

.hero {
  padding: 36px 36px 32px;
  text-align: left;
}
.hero-badge {
  display: inline-block;
  padding: 6px 12px;
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--text-soft);
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  margin-bottom: 14px;
}
.hero h1 {
  margin: 0 0 8px;
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 600;
  letter-spacing: -0.5px;
  background: linear-gradient(120deg, #ffffff, #c9d8ff 60%, #93e0ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .subtitle {
  margin: 0;
  color: var(--text-soft);
  font-size: clamp(14px, 1.6vw, 16px);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.card {
  position: relative;
  padding: 28px 26px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform .35s ease, box-shadow .35s ease, background .35s ease;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.10), transparent 40%);
  pointer-events: none;
}
.card:hover {
  transform: translateY(-4px);
  background: var(--glass-bg-strong);
  box-shadow:
    0 28px 70px rgba(8, 12, 35, 0.55),
    inset 0 1px 0 rgba(255, 255, 255, 0.22);
}
.card.featured {
  border-color: rgba(120, 200, 255, 0.45);
  box-shadow:
    0 20px 60px rgba(10, 132, 255, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.22);
}
.card-icon {
  width: 56px; height: 56px;
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(255,255,255,0.18), rgba(255,255,255,0.04));
  border: 1px solid var(--glass-border);
  color: #cfe7ff;
}
.card h2 {
  margin: 4px 0 0;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.2px;
}
.card p {
  margin: 0;
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.6;
  min-height: 2.6em;
}
.card-meta {
  display: flex; gap: 8px;
  color: var(--text-mute);
  font-size: 12px;
  margin-top: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.22);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.2px;
  text-decoration: none;
  cursor: pointer;
  color: #fff;
  background: linear-gradient(135deg, rgba(255,255,255,0.18), rgba(255,255,255,0.06));
  transition: transform .2s ease, box-shadow .25s ease, background .25s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn.primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-2) 100%);
  border-color: rgba(255,255,255,0.35);
  box-shadow: var(--primary-glow);
}
.btn.primary:hover {
  box-shadow: 0 16px 40px rgba(10, 132, 255, 0.55);
}

.ewt-button {
  display: block;
}

.hint {
  display: inline-block;
  font-size: 12.5px;
  line-height: 1.55;
  padding: 8px 12px;
  border-radius: 12px;
  background: rgba(255, 209, 102, 0.10);
  border: 1px solid rgba(255, 209, 102, 0.4);
  color: #ffe7a8;
}
.hint.warn { color: #ffe7a8; }

.tips {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  padding: 22px 26px;
  gap: 18px;
}
.tips .tip strong {
  display: block;
  margin-bottom: 4px;
  color: #cfe7ff;
  font-weight: 600;
  font-size: 13.5px;
  letter-spacing: 0.2px;
}
.tips .tip p {
  margin: 0;
  color: var(--text-soft);
  font-size: 13px;
  line-height: 1.65;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-mute);
  font-size: 12px;
  padding: 12px 0 24px;
}
.footer .dot { opacity: .55; }

@media (max-width: 960px) {
  .cards { grid-template-columns: 1fr 1fr; }
  .tips  { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .page { padding: 32px 16px 24px; gap: 20px; }
  .hero { padding: 24px; border-radius: 18px; }
  .cards { grid-template-columns: 1fr; gap: 16px; }
  .tips  { grid-template-columns: 1fr; padding: 18px; }
  .card  { padding: 22px 20px; border-radius: 18px; }
  .card p { min-height: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .bg-orb { animation: none; }
  .card, .btn { transition: none; }
}