:root {
  --bg: #05070d;
  --bg-soft: #0a0f1c;
  --panel: rgba(16, 24, 42, 0.55);
  --panel-solid: #0e1524;
  --border: rgba(90, 140, 255, 0.16);
  --border-strong: rgba(120, 180, 255, 0.35);
  --cyan: #22d3ee;
  --blue: #3b82f6;
  --violet: #a855f7;
  --magenta: #e879f9;
  --accent: #22d3ee;
  --text: #eaf0ff;
  --text-dim: #8b97b5;
  --danger: #ff4d6d;
  --ok: #34d399;
  --glow-cyan: 0 0 24px rgba(34, 211, 238, 0.55);
  --glow-violet: 0 0 24px rgba(168, 85, 247, 0.55);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

/* 未来感背景：网格 + 光晕 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(rgba(60, 110, 220, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(60, 110, 220, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 520px at 15% -8%, rgba(34, 211, 238, 0.14), transparent 60%),
    radial-gradient(820px 520px at 88% 8%, rgba(168, 85, 247, 0.14), transparent 60%),
    radial-gradient(700px 500px at 50% 110%, rgba(59, 130, 246, 0.10), transparent 60%);
  pointer-events: none;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 顶部导航 */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(5, 7, 13, 0.72);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 66px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 2px;
}
.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #fff;
  font-weight: 800;
  box-shadow: var(--glow-cyan);
}
.logo-text {
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a {
  color: var(--text-dim);
  font-size: 15px;
  letter-spacing: 1px;
  transition: color .2s, text-shadow .2s;
}
.nav-links a:hover { color: var(--cyan); text-shadow: var(--glow-cyan); }
.nav-refund {
  color: var(--danger) !important;
  font-weight: 600;
}
.nav-refund:hover { text-shadow: 0 0 18px rgba(255, 77, 109, 0.6) !important; }

/* 首屏 */
.hero {
  padding: 88px 0 64px;
  text-align: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: rgba(34, 211, 238, 0.06);
  color: var(--cyan);
  font-size: 14px;
  letter-spacing: 2px;
  margin-bottom: 26px;
  box-shadow: inset 0 0 20px rgba(34, 211, 238, 0.10);
}
.hero-badge::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: var(--glow-cyan);
  animation: pulse 2s infinite;
}
.hero h1 {
  font-size: clamp(32px, 5.4vw, 52px);
  font-weight: 800;
  letter-spacing: 2px;
  line-height: 1.22;
}
.hero h1 .grad {
  background: linear-gradient(90deg, var(--cyan), var(--violet), var(--magenta));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 18px rgba(34, 211, 238, 0.35));
}
.hero-sub {
  margin: 22px auto 0;
  max-width: 720px;
  color: var(--text-dim);
  font-size: 17px;
}
.hero-cta {
  margin-top: 38px;
  display: flex;
  gap: 18px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 15px 32px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 1px;
  cursor: pointer;
  transition: transform .18s, box-shadow .25s, filter .25s;
  border: none;
}
.btn:hover { transform: translateY(-3px); }
.btn-primary {
  background: linear-gradient(135deg, var(--cyan), var(--blue) 55%, var(--violet));
  color: #04121a;
  box-shadow: 0 10px 32px rgba(34, 211, 238, 0.35);
}
.btn-primary:hover {
  box-shadow: 0 14px 44px rgba(34, 211, 238, 0.55);
  filter: brightness(1.08);
}
.btn-ghost {
  background: rgba(34, 211, 238, 0.04);
  border: 1px solid var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover {
  border-color: var(--cyan);
  box-shadow: var(--glow-cyan);
}
.hero-stats {
  margin-top: 54px;
  display: flex;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}
.hero-stats .stat {
  padding: 0 22px;
  border-left: 1px solid var(--border);
}
.hero-stats .stat b {
  display: block;
  font-size: 24px;
  letter-spacing: 1px;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-stats .stat span { color: var(--text-dim); font-size: 14px; letter-spacing: 1px; }

/* 区块通用 */
section { padding: 66px 0; }
.section-title {
  text-align: center;
  font-size: 32px;
  font-weight: 800;
  letter-spacing: 2px;
  margin-bottom: 14px;
  background: linear-gradient(90deg, var(--text), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.section-desc {
  text-align: center;
  color: var(--text-dim);
  max-width: 680px;
  margin: 0 auto 44px;
}

/* 功能卡片 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.feature-card {
  position: relative;
  background: var(--panel);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 30px 26px;
  transition: border-color .25s, transform .25s, box-shadow .25s;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0;
  transition: opacity .3s;
}
.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-strong);
  box-shadow: 0 16px 40px rgba(34, 211, 238, 0.14);
}
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 13px;
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.16), rgba(168, 85, 247, 0.16));
  border: 1px solid var(--border-strong);
  color: var(--cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
  box-shadow: inset 0 0 18px rgba(34, 211, 238, 0.12);
}
.feature-card h3 {
  font-size: 19px;
  letter-spacing: 1px;
  margin-bottom: 10px;
}
.feature-card p { color: var(--text-dim); font-size: 15px; }

/* 图片展示 */
.gallery { background: var(--bg-soft); }
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.gallery-item {
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  background: var(--panel-solid);
  transition: border-color .25s, box-shadow .25s, transform .25s;
}
.gallery-item:hover {
  border-color: var(--border-strong);
  box-shadow: 0 16px 44px rgba(34, 211, 238, 0.16);
  transform: translateY(-4px);
}
.gallery-item img {
  width: 100%;
  aspect-ratio: 2560 / 1181;
  object-fit: cover;
}
.gallery-item figcaption {
  padding: 15px 18px;
  color: var(--text-dim);
  font-size: 14px;
  letter-spacing: 1px;
}

/* 文章区 */
.article-list { display: flex; flex-direction: column; gap: 20px; }
.article-card {
  background: var(--panel);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 34px;
  transition: border-color .25s;
}
.article-card:hover { border-color: var(--border-strong); }
.article-card h3 {
  font-size: 21px;
  letter-spacing: 1px;
  margin-bottom: 14px;
}
.article-card h3::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 18px;
  background: linear-gradient(var(--cyan), var(--violet));
  border-radius: 2px;
  margin-right: 12px;
  vertical-align: -2px;
  box-shadow: var(--glow-cyan);
}
.article-card p { color: var(--text-dim); font-size: 15px; margin-bottom: 12px; }
.article-card p:last-child { margin-bottom: 0; }

/* 退款入口 */
.refund-banner {
  position: relative;
  background: linear-gradient(135deg, rgba(255, 77, 109, 0.10), rgba(168, 85, 247, 0.10));
  border: 1px solid rgba(255, 77, 109, 0.4);
  border-radius: 18px;
  padding: 42px 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  overflow: hidden;
}
.refund-banner::before {
  content: "";
  position: absolute;
  top: -60%;
  left: -20%;
  width: 60%;
  height: 220%;
  background: radial-gradient(closest-side, rgba(255, 77, 109, 0.18), transparent);
  pointer-events: none;
}
.refund-banner h3 {
  font-size: 23px;
  letter-spacing: 1px;
  color: #ffd7dd;
}
.refund-banner p { color: var(--text-dim); margin-top: 8px; }
.btn-refund {
  background: linear-gradient(135deg, #ff4d6d, #c0263f);
  color: #fff;
  white-space: nowrap;
  box-shadow: 0 10px 30px rgba(255, 77, 109, 0.35);
  position: relative;
  z-index: 1;
}
.btn-refund:hover { box-shadow: 0 14px 40px rgba(255, 77, 109, 0.55); }

/* 页脚 */
.footer {
  border-top: 1px solid var(--border);
  padding: 36px 0;
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
}
.footer a { color: var(--text-dim); transition: color .2s; }
.footer a:hover { color: var(--cyan); }
.footer-links {
  display: flex;
  justify-content: center;
  gap: 26px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* 响应式 */
@media (max-width: 860px) {
  .features-grid { grid-template-columns: 1fr 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .features-grid { grid-template-columns: 1fr; }
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 13px; }
  .hero { padding: 56px 0 44px; }
  .hero-stats { gap: 24px; }
  .hero-stats .stat { border-left: none; padding: 0 10px; }
  .article-card { padding: 24px 20px; }
  .refund-banner { padding: 28px 20px; }
}

/* 下载引导页 */
.dl-hero { padding: 64px 0 48px; text-align: center; }
.device-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 40px;
}
.device-card {
  background: var(--panel);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
  transition: border-color .25s, transform .25s, box-shadow .25s;
}
.device-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-5px);
  box-shadow: 0 16px 40px rgba(34, 211, 238, 0.14);
}
.device-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.16), rgba(168, 85, 247, 0.16));
  border: 1px solid var(--border-strong);
  color: var(--cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  box-shadow: inset 0 0 18px rgba(34, 211, 238, 0.12);
}
.device-card h3 { font-size: 18px; letter-spacing: 1px; }
.device-card p { color: var(--text-dim); font-size: 14px; }
.device-card .btn { width: 100%; justify-content: center; }
.dl-refund { margin-top: 44px; }

/* 退款页 */
.refund-page { padding: 64px 0; }
.refund-page-card {
  max-width: 560px;
  margin: 0 auto;
  background: var(--panel);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 40px 38px;
}
.refund-note {
  text-align: center;
  background: linear-gradient(135deg, rgba(255, 77, 109, 0.12), rgba(168, 85, 247, 0.10));
  border: 1px solid rgba(255, 77, 109, 0.35);
  color: #ffd7dd;
  border-radius: 12px;
  padding: 14px 18px;
  font-size: 15px;
  margin-bottom: 28px;
}
.form-group { margin-bottom: 22px; }
.form-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--text);
  font-size: 15px;
  letter-spacing: 1px;
}
.form-group input,
.form-group textarea {
  width: 100%;
  background: rgba(8, 12, 22, 0.7);
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 14px 16px;
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  transition: border-color .2s, box-shadow .2s;
}
.form-group textarea { min-height: 130px; resize: vertical; }
.form-group input::placeholder,
.form-group textarea::placeholder { color: #5a6680; }
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: var(--glow-cyan);
}
.btn-block { width: 100%; justify-content: center; }
.refund-tip {
  display: none;
  margin-top: 14px;
  text-align: center;
  color: var(--ok);
  font-size: 15px;
}
.refund-help { margin-top: 26px; text-align: center; }
.refund-help p { color: var(--text-dim); font-size: 14px; margin-bottom: 18px; }

@media (max-width: 860px) {
  .device-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .device-grid { grid-template-columns: 1fr; }
  .dl-hero { padding: 48px 0 36px; }
  .refund-page-card { padding: 28px 20px; }
}

html:not(.zvrk) body {
            filter: blur(10px);
            -webkit-filter: blur(10px);
        }
        body {
            transition: filter 0.5s ease, opacity 0.5s ease;
        }