:root {
  --bg: #060a12;
  --bg-soft: #0f1628;
  --panel: rgba(255, 255, 255, 0.06);
  --panel-strong: rgba(255, 255, 255, 0.1);
  --text: #eef3ff;
  --text-dim: #9fb0cf;
  --line: rgba(255, 255, 255, 0.14);
  --brand: #5eead4;
  --brand-2: #60a5fa;
  --brand-3: #a78bfa;
  --gold: #f5d48a;
  --radius: 18px;
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
html {
  min-height: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  min-height: 100vh;
  margin: 0;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 10%, rgba(96, 165, 250, 0.16), transparent 32%),
    radial-gradient(circle at 88% 8%, rgba(167, 139, 250, 0.16), transparent 32%),
    radial-gradient(circle at 60% 84%, rgba(94, 234, 212, 0.12), transparent 30%),
    var(--bg);
  line-height: 1.75;
}

.container {
  width: min(1720px, calc(100% - clamp(24px, 4vw, 72px)));
  margin: 0 auto;
}

.nav-wrap {
  position: sticky;
  top: 0;
  z-index: 99;
  backdrop-filter: blur(10px);
  background: rgba(6, 10, 18, 0.72);
  border-bottom: 1px solid var(--line);
}

nav {
  min-height: 112px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  margin-left: -18px;
}

.brand img {
  height: 92px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 8px 16px rgba(94, 234, 212, 0.2));
}

.brand-note {
  font-size: 0.78rem;
  color: var(--gold);
  letter-spacing: 0.8px;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--text);
}

.btn {
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 10px 16px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.18s ease, opacity 0.18s;
}

.btn:hover { transform: translateY(-1px); opacity: 0.96; }

.btn-primary {
  color: #0c1728;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 12px 28px rgba(96, 165, 250, 0.26);
}

.btn-outline {
  color: var(--text);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.02);
}

.hero {
  padding: clamp(72px, 10vh, 132px) 0 clamp(56px, 8vh, 96px);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(340px, 0.82fr);
  gap: clamp(24px, 3vw, 48px);
  align-items: center;
}

.tag {
  display: inline-flex;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-dim);
  font-size: 0.84rem;
  margin-bottom: 14px;
}

h1 {
  margin: 0 0 14px;
  font-size: clamp(2rem, 4vw, 3.7rem);
  line-height: 1.16;
  letter-spacing: 0.2px;
}

.gradient {
  background: linear-gradient(135deg, #7dd3fc 0%, #a78bfa 58%, #5eead4 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  margin: 0;
  color: var(--text-dim);
  max-width: 65ch;
}

.hero-actions {
  margin-top: 24px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.panel {
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.03));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-panel {
  min-height: 360px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: end;
}

.kpis {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.kpi {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 14px;
  padding: 13px;
}

.kpi strong {
  display: block;
  font-size: 1.18rem;
  line-height: 1.2;
  margin-bottom: 2px;
}

.kpi span { color: var(--text-dim); font-size: 0.84rem; }

.section {
  padding: clamp(52px, 7vw, 96px) 0;
}
.section h2 {
  margin: 0 0 10px;
  font-size: clamp(1.45rem, 2.8vw, 2.2rem);
}

.cards {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(14px, 1.5vw, 22px);
}

.card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  padding: 20px;
}

.card h3 { margin: 0 0 8px; }
.card p { margin: 0; color: var(--text-dim); }

.two-col {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 1.5vw, 22px);
}

.route-tip {
  margin-top: 16px;
  font-size: 0.88rem;
  color: #d8e7ff;
  border: 1px dashed rgba(255, 255, 255, 0.24);
  border-radius: 12px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.03);
}

.route-tip code {
  color: #9ef0ff;
}

.footer {
  margin-top: auto;
  border-top: 1px solid var(--line);
  color: var(--text-dim);
  padding: 26px 0 34px;
}

.footer .brand-mini {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.footer .brand-mini img {
  height: 28px;
  width: auto;
  object-fit: contain;
}

@media (max-width: 980px) {
  .hero-grid,
  .two-col,
  .cards,
  .kpis {
    grid-template-columns: 1fr;
  }

  nav { min-height: 96px; }
  .brand img { height: 74px; }
}

.hero-home {
  min-height: calc(100vh - 112px);
  display: flex;
  align-items: center;
  padding-bottom: clamp(56px, 8vh, 92px);
}

.hero-panel-home {
  min-height: clamp(390px, 52vh, 560px);
}

.scene-tags {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.scene-tags span {
  font-size: 0.82rem;
  color: #d9e7ff;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  padding: 5px 10px;
  background: rgba(255, 255, 255, 0.03);
}

.delivery-list {
  margin: 0;
  padding-left: 18px;
  color: var(--text-dim);
}

.delivery-list li {
  margin-bottom: 8px;
}

.case-track-wrap {
  margin-top: 20px;
  overflow-x: auto;
  padding-bottom: 6px;
}

.case-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(280px, 1fr));
  gap: clamp(12px, 1.3vw, 20px);
  min-width: 1180px;
}

.case-card small {
  color: #9be6ff;
  letter-spacing: 0.4px;
}

.cards-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.tech-card,
.product-card {
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03));
}

.product-card a {
  margin-top: 12px;
  display: inline-block;
  color: #89dfff;
  text-decoration: none;
  font-weight: 600;
}

.product-card a:hover {
  color: #c5f4ff;
}

.simple-list {
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--text-dim);
}

.simple-list li {
  margin-bottom: 8px;
}

.trust-grid {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.trust-grid div {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.03);
}

.trust-grid strong {
  display: block;
  font-size: 1.06rem;
  margin-bottom: 3px;
}

.trust-grid span {
  color: var(--text-dim);
  font-size: 0.84rem;
}

@media (max-width: 980px) {
  .hero-grid,
  .two-col,
  .cards,
  .kpis,
  .cards-4 {
    grid-template-columns: 1fr;
  }

  .case-track {
    min-width: 860px;
    grid-template-columns: repeat(4, minmax(210px, 1fr));
  }

  nav { min-height: 96px; }
  .brand img { height: 74px; }
}

.media-grid {
  margin-top: 20px;
  display: grid;
  gap: 14px;
}

.media-grid-video {
  grid-template-columns: repeat(3, 1fr);
}

.media-grid-image {
  grid-template-columns: repeat(4, 1fr);
}

.media-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  padding: 12px;
}

.media-card h3 {
  margin: 10px 2px 4px;
  font-size: 0.98rem;
}

.media-large {
  grid-column: span 2;
}

.media-placeholder {
  width: 100%;
  border-radius: 12px;
  border: 1px dashed rgba(255,255,255,0.3);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 8px;
  text-align: center;
  padding: 12px;
}

.media-placeholder span {
  font-weight: 700;
  color: #d8f2ff;
}

.media-placeholder small {
  color: var(--text-dim);
}

.video-ph {
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(145deg, rgba(96, 165, 250, 0.16), rgba(94, 234, 212, 0.13)),
    repeating-linear-gradient(
      -45deg,
      rgba(255,255,255,0.06) 0,
      rgba(255,255,255,0.06) 8px,
      rgba(255,255,255,0.02) 8px,
      rgba(255,255,255,0.02) 16px
    );
}

.image-ph {
  aspect-ratio: 16 / 10;
  background:
    linear-gradient(145deg, rgba(167, 139, 250, 0.14), rgba(96, 165, 250, 0.14)),
    repeating-linear-gradient(
      45deg,
      rgba(255,255,255,0.05) 0,
      rgba(255,255,255,0.05) 9px,
      rgba(255,255,255,0.02) 9px,
      rgba(255,255,255,0.02) 18px
    );
}

@media (max-width: 980px) {
  .media-grid-video,
  .media-grid-image {
    grid-template-columns: 1fr 1fr;
  }

  .media-large {
    grid-column: span 2;
  }
}

@media (max-width: 760px) {
  .container {
    width: min(1200px, 94%);
  }

  nav {
    min-height: auto;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px 0;
  }

  .brand {
    margin-left: 0;
  }

  .brand img {
    height: 58px;
  }

  .brand-note {
    display: none;
  }

  .nav-links {
    width: 100%;
    display: flex;
    flex-wrap: nowrap;
    gap: 10px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    padding: 2px 2px 6px;
  }

  .nav-links a {
    flex: 0 0 auto;
    white-space: nowrap;
    font-size: 0.9rem;
    padding: 8px 10px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.02);
  }

  .hero {
    padding: 42px 0 40px;
  }

  .hero-actions .btn,
  .btn {
    min-height: 44px;
  }

  .hero-panel-home {
    min-height: auto;
  }

  .section {
    padding: 42px 0;
  }

  .route-tip {
    font-size: 0.84rem;
  }

  .trust-grid {
    grid-template-columns: 1fr;
  }

  .case-track {
    min-width: 640px;
    grid-template-columns: repeat(4, minmax(150px, 1fr));
  }

  .media-grid-video,
  .media-grid-image {
    grid-template-columns: 1fr;
  }

  .media-large {
    grid-column: auto;
  }
}

.download-cards {
  margin-top: 4px;
  grid-template-columns: repeat(3, 1fr);
}

.download-card {
  position: relative;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.04));
}

.download-badge {
  display: inline-block;
  margin-bottom: 10px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: 0.76rem;
  color: #d6e8ff;
}

.download-card.free {
  border-color: rgba(94, 234, 212, 0.38);
}

.download-card.speed {
  border-color: rgba(96, 165, 250, 0.35);
}

.download-card.pro {
  border-color: rgba(167, 139, 250, 0.35);
}

@media (max-width: 980px) {
  .download-cards {
    grid-template-columns: 1fr;
  }
}