:root {
  --accent: #fa731e;
  --accent-2: #fc9f47;
  --gold: #f7c056;
  --ink: #1c1916;
  --muted: #6b645c;
  --paper: #f7f5f2;
  --sky: #edf3fa;
  --card: rgba(255,255,255,.86);
  --line: rgba(250,115,30,.16);
  --shadow: 0 16px 40px rgba(80,40,10,.08);
  --radius: 22px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Segoe UI", sans-serif;
  background:
    radial-gradient(900px 420px at 90% -10%, rgba(250,115,30,.18), transparent 55%),
    linear-gradient(160deg, var(--paper), var(--sky));
  line-height: 1.65;
}
a { color: var(--accent); }
.wrap { width: min(1080px, calc(100% - 32px)); margin: 0 auto; }

header.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(247,245,242,.92);
  border-bottom: 1px solid rgba(255,255,255,.5);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  gap: 16px;
  min-height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
  font-weight: 800;
  letter-spacing: .02em;
  flex-shrink: 0;
}
.brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  box-shadow: 0 8px 16px rgba(250,115,30,.28);
  object-fit: cover;
  display: block;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}
.nav-toggle {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}
.nav-extra { display: none; }
.nav-burger {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  margin-left: auto;
}
.nav-burger span,
.nav-burger::before,
.nav-burger::after {
  content: "";
  display: block;
  width: 16px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: .92rem;
}
.nav-links a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
  white-space: nowrap;
}
.nav-links a:hover,
.nav-links a.active { color: var(--accent); }

.hero { padding: 48px 0 24px; }
.hero-home {
  padding: 56px 0 28px;
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 40px;
  align-items: center;
}
.kicker { color: var(--accent); font-weight: 700; letter-spacing: .08em; font-size: .82rem; }
h1 { font-size: clamp(1.9rem, 4vw, 3.2rem); line-height: 1.18; margin: 10px 0 16px; }
.lead, .sub, .muted { color: var(--muted); }
.lead { font-size: 1.12rem; max-width: 40em; }
.sub { margin: 0 0 22px; }
.muted { margin: 0 0 22px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 26px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 14px;
  font-weight: 700;
  text-decoration: none;
  border: 0;
  cursor: pointer;
}
.btn-ios { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; box-shadow: 0 10px 22px rgba(250,115,30,.28); }
.btn-android { background: #fff; color: var(--ink); border: 1px dashed #c9c1b8; }
.btn small { display: block; font-weight: 500; font-size: .72rem; opacity: .85; }
.btn-stack { display: flex; flex-direction: column; align-items: flex-start; line-height: 1.15; }
.note { margin-top: 12px; font-size: .88rem; color: var(--muted); }
.beian { color: var(--muted); text-decoration: none; }
.beian:hover { color: var(--accent); text-decoration: underline; }
.breadcrumb { font-size: .85rem; color: var(--muted); margin: 18px 0 0; }
.breadcrumb a { text-decoration: none; }

.phone {
  background: var(--card);
  border: 1px solid rgba(255,255,255,.8);
  border-radius: 32px;
  box-shadow: var(--shadow);
  padding: 22px;
}
.status { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.pill { background: #1c1916; color: #fff; border-radius: 999px; padding: 4px 10px; font-size: .78rem; }
.pill.on { background: #2f7d4a; }
.row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: .95rem; }
.tag { display: inline-block; background: #fff4ea; color: #c45c12; border-radius: 8px; padding: 2px 8px; font-size: .78rem; font-weight: 700; }

section { padding: 28px 0 8px; }
h2 { font-size: 1.7rem; margin: 0 0 8px; }
.grid, .steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.scenes, .split { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255,255,255,.7);
}
.icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: #fff4ea;
  margin-bottom: 12px;
  font-size: 1.2rem;
}
.card h3 { margin: 0 0 8px; font-size: 1.08rem; }
.card p { margin: 0; color: var(--muted); }
.step-num { font-weight: 800; color: var(--accent); font-size: 1.4rem; }
.scene h3 { margin: 0 0 6px; }
.who { font-size: .82rem; font-weight: 700; color: var(--accent); letter-spacing: .04em; }

.faq details {
  background: var(--card);
  border-radius: 16px;
  padding: 14px 18px;
  margin-bottom: 10px;
  box-shadow: var(--shadow);
}
summary { cursor: pointer; font-weight: 700; }
.faq p { margin: 8px 0 0; color: var(--muted); }

footer {
  margin-top: 40px;
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: .9rem;
  border-top: 1px solid rgba(255,255,255,.6);
}
.foot { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.foot-links { display: flex; flex-wrap: wrap; gap: 8px 14px; max-width: 520px; justify-content: flex-end; }
.foot-links a { text-decoration: none; color: var(--muted); font-weight: 600; }
.foot-links a:hover { color: var(--accent); }

@media (max-width: 860px) {
  .hero-home, .grid, .steps, .scenes, .split { grid-template-columns: 1fr; }
  .nav-burger { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    right: 16px;
    left: 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    background: #fff;
    border-radius: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--line);
  }
  .nav-links a { padding: 12px 10px; border-radius: 10px; }
  .nav-toggle:checked ~ .nav-links { display: flex; }
  .nav-extra { display: block; }
  .foot-links { justify-content: flex-start; }
}