/* ===== 基础 ===== */
:root {
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-bg-strong: rgba(255, 255, 255, 0.14);
  --glass-border: rgba(255, 255, 255, 0.22);
  --glass-hi: rgba(255, 255, 255, 0.55);
  --text: #eef1ff;
  --text-dim: #b9bfe6;
  --accent: #8b7bff;
  --accent-2: #4fd1ff;
  --accent-3: #ff7eb6;
  --radius: 22px;
  --blur: 22px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--text);
  background: #0a0a1f;
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

/* ===== 流动极光背景 ===== */
.aurora {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  background:
    radial-gradient(120% 120% at 50% 0%, #1a1140 0%, #0a0a1f 55%, #050510 100%);
}

.blob {
  position: absolute;
  width: 46vw;
  height: 46vw;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
  mix-blend-mode: screen;
  animation: float 18s ease-in-out infinite;
}

.blob-1 { background: #6d5cff; top: -10%; left: -8%; }
.blob-2 { background: #00c2ff; top: 20%; right: -12%; animation-delay: -4s; }
.blob-3 { background: #ff5fa2; bottom: -15%; left: 15%; animation-delay: -8s; }
.blob-4 { background: #2bd9b4; bottom: 5%; right: 10%; animation-delay: -12s; }

@keyframes float {
  0%   { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(6%, 8%) scale(1.12); }
  66%  { transform: translate(-5%, 4%) scale(0.95); }
  100% { transform: translate(0, 0) scale(1); }
}

.grain {
  position: absolute;
  inset: 0;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ===== 玻璃通用 ===== */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur)) saturate(160%);
  -webkit-backdrop-filter: blur(var(--blur)) saturate(160%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.37),
    inset 0 1px 0 var(--glass-hi);
  position: relative;
  overflow: hidden;
}

/* 顶部高光描边 */
.glass::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(255,255,255,0.5), rgba(255,255,255,0) 40%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0.6;
}

/* ===== 导航 ===== */
.nav-wrap {
  position: sticky;
  top: 16px;
  z-index: 50;
  display: flex;
  justify-content: center;
  padding: 0 16px;
}

.nav {
  width: min(1120px, 100%);
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 12px 20px;
  border-radius: 18px;
}

.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.brand-mark {
  width: 26px; height: 26px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 18px rgba(139,123,255,0.6);
}

.nav-links {
  display: flex;
  gap: 26px;
  list-style: none;
  margin-left: auto;
  font-size: 15px;
  color: var(--text-dim);
}
.nav-links a { transition: color .2s; }
.nav-links a:hover { color: var(--text); }

.nav-cta {
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  border-radius: 14px;
  transition: transform .2s, background .2s;
}
.nav-cta:hover { transform: translateY(-2px); background: var(--glass-bg-strong); }

/* ===== 首屏 ===== */
.hero {
  display: flex;
  justify-content: center;
  padding: 90px 16px 40px;
}
.hero-inner {
  width: min(880px, 100%);
  padding: 56px 44px;
  text-align: center;
}
.eyebrow {
  letter-spacing: 4px;
  font-size: 12px;
  color: var(--accent-2);
  text-transform: uppercase;
  margin-bottom: 18px;
}
.hero-title {
  font-size: clamp(40px, 8vw, 76px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -1px;
  margin-bottom: 22px;
}
.grad-text {
  background: linear-gradient(120deg, var(--accent-3), var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  font-size: clamp(15px, 2.4vw, 19px);
  color: var(--text-dim);
  margin-bottom: 28px;
}
.hero-sub b { color: var(--text); }

.hero-chips { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 32px; }
.chip { padding: 8px 16px; border-radius: 999px; font-size: 14px; }

.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn-primary {
  padding: 13px 28px;
  border-radius: 14px;
  font-weight: 700;
  color: #0a0a1f;
  background: linear-gradient(120deg, #fff, #cfe0ff);
  box-shadow: 0 8px 24px rgba(139,123,255,0.45);
  transition: transform .2s, box-shadow .2s;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(139,123,255,0.6); }
.btn-ghost { padding: 13px 26px; border-radius: 14px; font-weight: 600; transition: background .2s, transform .2s; }
.btn-ghost:hover { background: var(--glass-bg-strong); transform: translateY(-2px); }

/* ===== 区块通用 ===== */
.section { padding: 64px 16px; max-width: 1160px; margin: 0 auto; }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head h2 { font-size: clamp(26px, 4.5vw, 40px); font-weight: 800; margin-bottom: 12px; }
.section-head p { color: var(--text-dim); font-size: 16px; }

/* ===== 产品卡片 ===== */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  transition: transform .3s cubic-bezier(.2,.8,.2,1), box-shadow .3s;
}
.card.feature {
  background: linear-gradient(160deg, rgba(139,123,255,0.22), rgba(79,209,255,0.10));
  border-color: rgba(180,170,255,0.45);
}
.card:hover { transform: translateY(-8px); box-shadow: 0 18px 50px rgba(0,0,0,0.5), inset 0 1px 0 var(--glass-hi); }

.card-glow {
  position: absolute;
  width: 220px; height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.25), transparent 70%);
  top: var(--my, 50%); left: var(--mx, 50%);
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity .3s;
  pointer-events: none;
}
.card:hover .card-glow { opacity: 1; }

.card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.card-icon {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  font-size: 26px;
  border-radius: 16px;
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border);
}
.card-icon svg { width: 26px; height: 26px; fill: var(--text); }
.badge {
  font-size: 12px;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(255,126,182,0.18);
  border: 1px solid rgba(255,126,182,0.4);
  color: #ffc6e0;
}
.badge-fw {
  background: rgba(79,209,255,0.18);
  border-color: rgba(79,209,255,0.45);
  color: #bdf0ff;
}
.card h3 { font-size: 24px; font-weight: 800; margin-bottom: 10px; }
.card-desc { color: var(--text-dim); font-size: 14.5px; margin-bottom: 18px; }

.feat { list-style: none; display: flex; flex-direction: column; gap: 10px; margin-bottom: 20px; }
.feat li { font-size: 14px; color: var(--text); padding-left: 22px; position: relative; }
.feat li::before {
  content: "";
  position: absolute; left: 4px; top: 9px;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent-2);
}
.feat b { color: #fff; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; }
.tag {
  font-size: 12px;
  padding: 5px 11px;
  border-radius: 999px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-dim);
}

.card-dl-btn {
  margin-top: 16px;
  display: block;
  text-align: center;
  padding: 11px 16px;
  border-radius: 14px;
  font-weight: 600;
  color: var(--text);
  transition: background .2s, transform .2s;
}
.card-dl-btn:hover { background: var(--glass-bg-strong); transform: translateY(-2px); }

/* ===== 对比表 ===== */
.table-wrap { padding: 8px; overflow-x: auto; }
.compare { width: 100%; border-collapse: collapse; min-width: 560px; }
.compare th, .compare td { padding: 16px 18px; text-align: center; font-size: 14.5px; }
.compare thead th {
  font-size: 15px;
  color: var(--text);
  border-bottom: 1px solid var(--glass-border);
}
.compare thead th:first-child { text-align: left; }
.compare tbody td:first-child { text-align: left; color: var(--text-dim); }
.compare tbody tr { border-bottom: 1px solid rgba(255,255,255,0.08); }
.compare tbody tr:last-child { border-bottom: none; }
.compare .ok { font-weight: 700; font-size: 17px; }
.compare .ok::before {
  content: "";
  display: inline-block;
  width: 8px; height: 14px;
  border: solid #7dffb0;
  border-width: 0 2.5px 2.5px 0;
  transform: rotate(45deg);
  margin-right: 8px;
  vertical-align: middle;
  margin-bottom: 3px;
}
.compare .no { color: rgba(255,255,255,0.28); }

/* ===== 关于 ===== */
.about { padding: 44px; text-align: center; max-width: 820px; margin: 0 auto; }
.about h2 { font-size: 28px; margin-bottom: 16px; }
.about p { color: var(--text-dim); font-size: 16px; }
.about b { color: var(--text); }

/* ===== 页脚 ===== */
.footer { padding: 40px 16px 56px; display: flex; justify-content: center; }
.footer-inner {
  width: min(1120px, 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 20px 26px;
  border-radius: 18px;
}
.brand-footer { font-weight: 700; letter-spacing: 1px; }
.copy { color: var(--text-dim); font-size: 13px; }

/* ===== 滚动入场 ===== */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.8,.2,1); }
.reveal.in { opacity: 1; transform: none; }

/* ===== 下载 ===== */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.dl-card { padding: 30px 26px; display: flex; flex-direction: column; align-items: flex-start; transition: transform .3s cubic-bezier(.2,.8,.2,1), box-shadow .3s; }
.dl-card:hover { transform: translateY(-8px); box-shadow: 0 18px 50px rgba(0,0,0,0.5), inset 0 1px 0 var(--glass-hi); }
.dl-top { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.dl-top h3 { font-size: 22px; font-weight: 800; }
.dl-desc { color: var(--text-dim); font-size: 14.5px; margin-bottom: 22px; }
.dl-btn {
  margin-top: auto;
  align-self: stretch;
  text-align: center;
  padding: 12px 18px;
  border-radius: 14px;
  font-weight: 600;
  color: var(--text);
  transition: background .2s, transform .2s;
}
.dl-btn:hover { background: var(--glass-bg-strong); transform: translateY(-2px); }

/* ===== 定价 ===== */
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 28px; }
.price-card { padding: 30px 26px; transition: transform .3s cubic-bezier(.2,.8,.2,1), box-shadow .3s; }
.price-card:hover { transform: translateY(-8px); box-shadow: 0 18px 50px rgba(0,0,0,0.5), inset 0 1px 0 var(--glass-hi); }
.price-card h3 { font-size: 22px; font-weight: 800; margin-bottom: 18px; }
.price-row { display: flex; align-items: center; justify-content: space-between; padding: 11px 0; border-bottom: 1px solid rgba(255,255,255,0.08); font-size: 15px; }
.price-row:last-child { border-bottom: none; }
.price-row span { color: var(--text-dim); }
.price-row b { color: #fff; font-size: 17px; }

.extra { padding: 36px 40px; max-width: 880px; margin: 0 auto; }
.extra h3 { font-size: 22px; margin-bottom: 18px; text-align: center; }
.extra .feat { max-width: 640px; margin: 0 auto; }

/* ===== 响应式 ===== */
@media (max-width: 880px) {
  .cards, .dl-grid, .price-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .hero-inner { padding: 44px 24px; }
}

@media (prefers-reduced-motion: reduce) {
  .blob { animation: none; }
  .reveal { transition: none; opacity: 1; transform: none; }
}