/* ===== 设计变量：取自 Halo TV 图标（深海军蓝 + 蓝青渐变）与 launcher 紫蓝背景 ===== */
:root {
  --bg: #050b24;
  --bg-2: #0a1438;
  --bg-3: #101d4d;
  --surface: rgba(255, 255, 255, 0.05);
  --surface-2: rgba(255, 255, 255, 0.08);
  --line: rgba(255, 255, 255, 0.10);
  --ink: #f3f6ff;
  --ink-2: #b7c2e3;
  --ink-3: #7f8bb3;
  --blue: #1f6bff;
  --cyan: #3fd8f7;
  --violet: #6b4bd8;
  --grad: linear-gradient(120deg, #1f6bff 0%, #2aa8ff 55%, #3fd8f7 100%);
  --radius: 18px;
  --container: 1160px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", "Noto Sans TC", "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--cyan); text-decoration: none; }
a:hover { color: #fff; }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3 { margin: 0 0 .5em; line-height: 1.15; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.6rem, 6vw, 4.6rem); font-weight: 800; }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.8rem); font-weight: 800; }
h3 { font-size: 1.15rem; font-weight: 700; }
p { margin: 0 0 1em; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 110px 0; position: relative; }
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.eyebrow {
  display: inline-block;
  font-size: .78rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase;
  color: var(--cyan); margin-bottom: 14px;
}
.lead { font-size: 1.15rem; color: var(--ink-2); }
.center { text-align: center; }
.narrow { max-width: 640px; margin-left: auto; margin-right: auto; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 26px; border-radius: 999px;
  font-weight: 700; font-size: 1rem;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 10px 30px rgba(31, 107, 255, .45); }
.btn-primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 14px 38px rgba(42, 168, 255, .55); }
.btn-ghost { background: var(--surface); color: var(--ink); border: 1px solid var(--line); }
.btn-ghost:hover { background: var(--surface-2); color: #fff; }
.btn svg { width: 20px; height: 20px; flex: none; }

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(5, 11, 36, .72);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 12px; color: #fff; font-weight: 800; font-size: 1.15rem; }
.brand:hover { color: #fff; }
.brand img { width: 36px; height: 36px; border-radius: 9px; }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: var(--ink-2); font-weight: 500; font-size: .95rem; }
.nav-links a:hover { color: #fff; }
.nav-right { display: flex; align-items: center; gap: 12px; }
.lang-btn {
  font: inherit; font-size: .85rem; font-weight: 600;
  color: var(--ink); background: var(--surface); border: 1px solid var(--line);
  border-radius: 999px; padding: 7px 14px; cursor: pointer;
}
.lang-btn:hover { background: var(--surface-2); }
.nav-cta { padding: 9px 18px; font-size: .9rem; }

/* ===== Hero ===== */
.hero {
  position: relative; overflow: hidden;
  padding: 90px 0 40px;
  background:
    radial-gradient(60% 50% at 20% 10%, rgba(107, 75, 216, .35), transparent 70%),
    radial-gradient(50% 45% at 85% 20%, rgba(31, 107, 255, .35), transparent 70%),
    linear-gradient(180deg, var(--bg-2) 0%, var(--bg) 100%);
}
.hero-inner { text-align: center; position: relative; z-index: 2; }
.hero-icon {
  width: 104px; height: 104px; margin: 0 auto 26px; border-radius: 24px;
  box-shadow: 0 20px 60px rgba(31, 107, 255, .5), 0 0 0 1px rgba(255, 255, 255, .08);
}
.hero h1 { margin-bottom: .2em; }
.hero .lead { font-size: clamp(1.1rem, 2vw, 1.35rem); max-width: 620px; margin: 0 auto 34px; }
.hero-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; }
.hero-meta {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 8px 26px;
  margin-top: 22px; font-size: .85rem; color: var(--ink-3);
}

/* 电视样机 */
.tv-stage { position: relative; margin: 70px auto 0; max-width: 980px; perspective: 1800px; }
.tv {
  position: relative; z-index: 2;
  padding: 14px; border-radius: 22px;
  background: linear-gradient(180deg, #1a1f33, #0b0e1a);
  box-shadow: 0 50px 120px rgba(0, 0, 0, .6), 0 0 0 1px rgba(255, 255, 255, .08), inset 0 1px 0 rgba(255, 255, 255, .12);
  transform: rotateX(8deg);
  transform-origin: 50% 100%;
  transition: transform .8s cubic-bezier(.2, .8, .2, 1);
}
.tv-stage:hover .tv { transform: rotateX(0deg); }
.tv img { border-radius: 10px; width: 100%; height: auto; }
.tv-stand {
  width: 34%; height: 22px; margin: 0 auto;
  background: linear-gradient(180deg, #151a2b, #0a0d18);
  clip-path: polygon(8% 0, 92% 0, 100% 100%, 0 100%);
}
.tv-glow {
  position: absolute; inset: 20% 5% -8%; z-index: 1;
  background: radial-gradient(closest-side, rgba(42, 168, 255, .45), transparent);
  filter: blur(40px);
}
.float-chip {
  position: absolute; z-index: 3;
  display: flex; align-items: center; gap: 10px;
  padding: 12px 18px; border-radius: 14px;
  background: rgba(16, 29, 77, .78); border: 1px solid rgba(255, 255, 255, .14);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  font-weight: 600; font-size: .92rem; white-space: nowrap;
  box-shadow: 0 16px 40px rgba(0, 0, 0, .4);
  animation: bob 6s ease-in-out infinite;
}
.float-chip .dot { width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center; background: var(--grad); }
.float-chip .dot svg { width: 17px; height: 17px; color: #fff; }
.chip-1 { left: -40px; top: 18%; }
.chip-2 { right: -46px; top: 42%; animation-delay: -2s; }
.chip-3 { left: 6%; bottom: -6px; animation-delay: -4s; }
@keyframes bob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* ===== 卖点区：左右交替 ===== */
.feature-row {
  display: grid; grid-template-columns: 1fr 1.15fr; align-items: center; gap: 70px;
  margin-top: 120px;
}
.feature-row:first-of-type { margin-top: 0; }
.feature-row.reverse .feature-copy { order: 2; }
.feature-copy h2 { margin-bottom: .45em; }
.feature-copy p { color: var(--ink-2); font-size: 1.05rem; }
.pill-list { list-style: none; padding: 0; margin: 26px 0 0; display: grid; gap: 12px; }
.pill-list li {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 18px; border-radius: 14px;
  background: var(--surface); border: 1px solid var(--line);
  color: var(--ink); font-weight: 500;
}
.pill-list svg { width: 20px; height: 20px; color: var(--cyan); flex: none; }
.feature-visual {
  position: relative; border-radius: var(--radius); overflow: hidden;
  background: linear-gradient(150deg, #3a2a7a 0%, #26306e 50%, #1a3a8a 100%);
  border: 1px solid var(--line);
  box-shadow: 0 30px 80px rgba(0, 0, 0, .45);
}
.feature-visual img { width: 100%; }
.feature-visual.padded { padding: 36px; display: grid; place-items: center; }
.feature-visual.padded img { border-radius: 12px; box-shadow: 0 18px 50px rgba(0, 0, 0, .4); }

/* 局部截图组合 */
.tiles-combo { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; width: 100%; max-width: 440px; }
.tiles-combo img { width: 100%; }

/* ===== 功能网格 ===== */
.section-alt { background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 50%, var(--bg) 100%); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 56px; }
.card {
  padding: 30px 26px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line);
  transition: transform .25s ease, border-color .25s ease, background .25s ease;
}
.card:hover { transform: translateY(-4px); border-color: rgba(63, 216, 247, .4); background: var(--surface-2); }
.card-icon {
  width: 52px; height: 52px; border-radius: 14px; margin-bottom: 20px;
  display: grid; place-items: center; background: var(--grad);
  box-shadow: 0 10px 26px rgba(31, 107, 255, .4);
}
.card-icon svg { width: 26px; height: 26px; color: #fff; }
.card p { color: var(--ink-2); font-size: .95rem; margin: 0; }

/* ===== 下载 CTA ===== */
.cta-band {
  position: relative; overflow: hidden; text-align: center;
  padding: 80px 32px; border-radius: 28px;
  background:
    radial-gradient(70% 90% at 15% 0%, rgba(107, 75, 216, .55), transparent 70%),
    radial-gradient(60% 90% at 90% 100%, rgba(63, 216, 247, .35), transparent 70%),
    linear-gradient(120deg, #0e1c5a, #13277a);
  border: 1px solid rgba(255, 255, 255, .12);
}
.cta-band img { width: 88px; height: 88px; margin: 0 auto 24px; border-radius: 20px; box-shadow: 0 16px 44px rgba(0, 0, 0, .4); }
.cta-band p { color: var(--ink-2); max-width: 520px; margin: 0 auto 30px; }

.disclaimer { margin-top: 40px; font-size: .8rem; color: var(--ink-3); text-align: center; }

/* ===== 页脚 ===== */
.site-footer { border-top: 1px solid var(--line); padding: 48px 0 40px; font-size: .9rem; color: var(--ink-3); }
.footer-grid { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 28px; }
.footer-brand { display: flex; align-items: center; gap: 12px; color: #fff; font-weight: 700; margin-bottom: 10px; }
.footer-brand img { width: 32px; height: 32px; border-radius: 8px; }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-links a { color: var(--ink-2); }
.footer-links a:hover { color: #fff; }
.copyright { margin-top: 28px; }

/* ===== 法务页 ===== */
.legal { padding: 70px 0 100px; }
.legal .container { max-width: 820px; }
.legal h1 { font-size: clamp(2rem, 4vw, 2.8rem); }
.legal h2 { font-size: 1.3rem; margin: 2.2em 0 .7em; }
.legal p, .legal li { color: var(--ink-2); }
.legal ul { padding-left: 1.3em; }
.legal li { margin-bottom: .5em; }
.legal strong { color: var(--ink); }
.legal .updated { color: var(--ink-3); font-size: .9rem; }
.legal table { width: 100%; border-collapse: collapse; margin: 1em 0 1.5em; font-size: .92rem; }
.legal th, .legal td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.legal th { color: var(--ink); background: var(--surface); font-weight: 600; }
.legal td { color: var(--ink-2); }
.legal address { font-style: normal; color: var(--ink-2); line-height: 1.8; }

/* ===== 滚动进入动画 ===== */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s ease, transform .8s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .float-chip { animation: none; }
  .tv { transform: none; }
}

/* ===== 响应式 ===== */
@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .feature-row, .feature-row.reverse { grid-template-columns: 1fr; gap: 40px; margin-top: 90px; }
  .feature-row.reverse .feature-copy { order: 0; }
  .chip-1 { left: -8px; }
  .chip-2 { right: -8px; }
}
@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .section { padding: 80px 0; }
  .container { padding: 0 16px; }
  .hero { padding-top: 60px; }
  .float-chip { font-size: .78rem; padding: 8px 12px; }
  .float-chip .dot { width: 24px; height: 24px; }
  .chip-1 { top: -18px; left: 4px; }
  .chip-2 { top: auto; bottom: 30px; right: 4px; }
  .chip-3 { display: none; }
  .grid-4 { grid-template-columns: 1fr; }
  .cta-band { padding: 56px 20px; }
  .feature-visual.padded { padding: 20px; }
  .legal table { font-size: .85rem; }
  .legal th, .legal td { padding: 10px 8px; }
}