:root {
  --bg: #0f1115;
  --panel: #1a1d24;
  --ink: #eceef2;
  --mute: #9aa1ad;
  --line: #2b303a;
  --key: #2a2f38;
  --key-top: #3a404c;
  --accent: #8ab4ff;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "SF Pro Text", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}
img { max-width:100%;height:auto; display: block; }
a { color: inherit; text-decoration: none; }
.wrap { width: min(1060px, calc(100% - 40px)); margin-inline: auto; }
nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(15,17,21,0.92);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 56px;
}
.brand { font-weight: 700; letter-spacing: -0.03em; }
.links { display: flex; gap: 18px; font-size: 0.88rem; color: var(--mute); }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--ink);
  color: #111;
  font-weight: 700;
  padding: 8px 14px;
  border-radius: 8px;
}
.ghost { color: var(--mute); padding: 8px 10px; }
.hero { padding: 64px 0 40px; }
.kicker { font-size: 0.8rem; letter-spacing: 0.12em; color: var(--accent); margin-bottom: 10px; }
.hero h1, .page-head h1 {
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  letter-spacing: -0.04em;
  line-height: 1.15;
}
.lead { color: var(--mute); margin: 12px 0; }
.keys {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 28px 0 22px;
  flex-wrap: wrap;
}
kbd {
  display: inline-flex;
  min-width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, var(--key-top), var(--key));
  border: 1px solid #4a5160;
  border-radius: 8px;
  box-shadow: 0 3px 0 #0a0c10;
  font-size: 1rem;
}
.keys em { color: var(--mute); font-style: normal; margin-left: 6px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; }
.section { padding: 76px 0; }
.head { margin-bottom: 26px; max-width: 38em; }
.head p, .card p, .section p, details, .person, .scene { color: var(--mute); }
.grid6, .cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.card, .download-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px;
}
.icon { color: var(--accent); font-size: 0.75rem; margin-bottom: 6px; }
.card h3, .download-card h3, .section h2, .visual h2, .cta h2, .article h2 { color: var(--ink); }
.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 28px;
  align-items: center;
}
.split img, .shot img, .cta img {
  width: 100%;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid var(--line);
}
.scene-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 16px 0 18px;
}
.scene {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  display: flex;
  gap: 8px;
  color: var(--ink);
}
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.review { background: var(--panel); border-radius: 10px; padding: 16px; }
.review p { color: var(--ink); }
.person { margin-top: 12px; display: flex; flex-direction: column; }
.visual { padding: 0 0 76px; }
.metrics { display: flex; gap: 22px; margin: 16px 0; }
.metrics b { display: block; font-size: 1.5rem; color: var(--accent); }
.metrics small { color: var(--mute); }
.faq-layout {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 28px;
}
details { border-bottom: 1px solid var(--line); padding: 12px 0; }
summary { cursor: pointer; font-weight: 700; color: var(--ink); }
details p { margin-top: 8px; }
.cta { background: var(--panel); padding: 36px 0; border-top: 1px solid var(--line); }
.cta-in {
  display: grid;
  grid-template-columns: 0.7fr 1.1fr auto;
  gap: 20px;
  align-items: center;
}
.cta img { height: 110px; object-fit: cover; }
footer {
  padding: 36px 0 18px;
  color: var(--mute);
}
.footer {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}
.footer h4 { color: var(--accent); margin-bottom: 8px; }
.footer a { display: block; margin: 6px 0; }
.copy { border-top: 1px solid var(--line); padding-top: 12px; font-size: 0.82rem; }
.page-head { padding: 48px 0 12px; }
.help-layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 28px;
}
.side a { display: block; padding: 8px 0; border-bottom: 1px solid var(--line); color: var(--mute); }
.article { margin-bottom: 36px; }
.article .shot { margin: 14px 0; }
.policy { margin-top: 14px; padding: 14px; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; }
@media (max-width: 900px) {
  .grid6, .cards, .review-grid, .split, .faq-layout, .footer, .help-layout, .cta-in {
    grid-template-columns: 1fr;
  }
  .links { display: none; }
}
@media (max-width: 640px) {
  .scene-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}