/* 基础设置 */
:root {
  --bg: #0b1220;
  --surface: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.12);
  --text: #e6ebf3;
  --muted: #aab3c7;
  --primary: #22d3ee;
  --primary-600: #06b6d4;
  --accent: #60a5fa;
  --shadow: 0 10px 30px rgba(2, 8, 20, 0.35);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(96,165,250,.25), transparent 55%),
    radial-gradient(1000px 600px at 100% 10%, rgba(34,211,238,.2), transparent 60%),
    linear-gradient(180deg, #0b1220 0%, #0a1120 100%);
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
svg {
  display: block;
  max-width: 100%;
}

.nowrap { white-space: nowrap; }

.container {
  width: min(1160px, 92vw);
  margin: 0 auto;
}

/* 顶部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: saturate(180%) blur(12px);
  background: linear-gradient(180deg, rgba(7,12,22,.7), rgba(7,12,22,.35) 60%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
}
.brand-text { font-weight: 700; letter-spacing: .2px; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 16px;
}
.nav-links a {
  color: var(--text);
  text-decoration: none;
  opacity: .9;
}
.nav-links a:hover { opacity: 1; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: 12px;
  border: 1px solid var(--border);
  color: var(--text);
  text-decoration: none;
  transition: transform .12s ease, box-shadow .12s ease, background .2s ease, color .2s ease;
  will-change: transform;
}
.btn.small { padding: 8px 12px; border-radius: 10px; font-size: 14px; }
.btn.primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: #08101e;
  border-color: transparent;
  box-shadow: 0 8px 20px rgba(34, 211, 238, .25), inset 0 1px 0 rgba(255,255,255,.2);
}
.btn.primary:hover { transform: translateY(-1px); box-shadow: 0 10px 24px rgba(34, 211, 238, .30); }
.btn.ghost { background: transparent; }
.btn.ghost:hover { background: rgba(255,255,255,.06); }

/* 卡片与通用元素 */
.card {
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.04));
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
}
.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: 16px 0 0 0;
  list-style: none;
}
.badges li {
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,.06);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
}

/* 首屏 */
.hero {
  position: relative;
  padding: 64px 0 32px;
}
.hero-bg .blob {
  position: absolute;
  filter: blur(6px) saturate(120%);
  opacity: .18;
  pointer-events: none;
}
.hero-bg .b1 { width: 38vw; left: -8vw; top: -6vw; transform: rotate(-8deg); }
.hero-bg .b2 { width: 32vw; right: -6vw; top: -2vw; transform: rotate(12deg); }
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 24px;
  align-items: center;
}
.hero-copy {
  padding: 28px;
}
.hero-copy .domain {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 6px;
}
.hero-copy h1 {
  margin: 6px 0 10px;
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.2;
}
.hero-copy .subtitle {
  color: var(--muted);
  font-size: 16px;
  margin: 0 0 14px 0;
}
.hero-copy .cta { display: flex; gap: 12px; margin-top: 6px; }
.hero-media { padding: 10px; }
.hero-media img { border-radius: 12px; }

/* 通用分区 */
.section { padding: 56px 0; }
.section.alt { background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,0) 60%); }
.section-title {
  margin: 0 0 8px;
  font-size: clamp(22px, 3.8vw, 34px);
}
.section-desc { margin: 0 0 16px; color: var(--muted); }

/* 功能网格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}
.feature {
  padding: 18px;
  min-height: 180px;
}
.feature .icon {
  width: 28px; height: 28px;
  color: var(--primary);
  margin-bottom: 10px;
}
.feature h3 { margin: 4px 0 6px; font-size: 18px; }
.feature p { margin: 0; color: var(--muted); font-size: 14px; }

/* 画廊 */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.shot { padding: 10px; }
.shot img { border-radius: 12px; }

/* 场景 */
.usecases {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.uc { padding: 18px; }
.uc h3 { margin: 0 0 6px; }
.uc p { margin: 0; color: var(--muted); }

/* 下载区 */
.download-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 16px;
  align-items: center;
}
.dl-copy { padding: 22px; }
.dl-media { padding: 10px; }
.dl-media img { border-radius: 12px; }

/* 页脚 */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 40px;
  background: radial-gradient(700px 300px at 90% 0%, rgba(96,165,250,.2), transparent 60%);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr .6fr;
  gap: 16px;
  align-items: start;
}
.domain { color: var(--muted); margin: 4px 0; font-size: 14px; }
.fine { color: var(--muted); font-size: 13px; margin: 4px 0 0; }
.links { display: grid; gap: 8px; }
.links a { color: var(--text); text-decoration: none; opacity: .85; }
.links a:hover { opacity: 1; }

/* 过渡显现与倾斜动效 */
.reveal { opacity: 0; transform: translateY(10px) scale(.98); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: translateY(0) scale(1); }
.tilt { transform-style: preserve-3d; transition: transform .12s ease; will-change: transform; }
.tilt .tilt-inner { transform: translateZ(18px); }

/* 响应式 */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(3, 1fr); }
  .download-grid, .hero-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: 1fr; }
  .usecases { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .hero { padding: 44px 0 24px; }
  .section { padding: 44px 0; }
  .btn { padding: 10px 14px; }
}