:root {
  --ink: #12181a;
  --text: #37474c;
  --mute: #71837f;
  --line: #dfe7e3;
  --paper: #f7faf8;
  --white: #ffffff;
  --pri: #2b3a42;
  --pri-deep: #1d2a30;
  --accent: #8bc34a;
  --soft: #eaf2ec;
  --soft-2: #f1f8e3;
}

/* 双栏：左侧半透明目录页 + 右侧手机 + 左下圆章 + 底部胶囊 */
.hv-dual .hero-visual { min-height: 512px; }
.hv-dual .hero-visual::before {
  content: ""; position: absolute; left: 5%; top: 9%; width: 45%; height: 74%;
  border-radius: 14px; border: 1px solid #dfe7e3;
  background:
    repeating-linear-gradient(180deg, #ffffff 0 38px, #eef3f0 38px 41px);
  rotate: -5deg; box-shadow: 0 20px 40px rgba(15,35,30,.16);
}
.hv-dual .hero-visual::after {
  content: "双栏浏览"; position: absolute; left: 3%; top: 5%;
  padding: 8px 13px; border-radius: 999px; background: #1d2a30; color: #eaf5d8;
  font-size: 12px; font-weight: 800; rotate: -2deg; box-shadow: 0 12px 26px rgba(15,35,30,.2);
}
.hv-dual .hero-glow { width: 64%; opacity: .34; }
.hv-dual .stage-phone {
  width: min(198px, 47%); justify-self: end; align-self: center; margin-right: 5%; margin-top: 10px;
  padding: 7px; border-radius: 26px; background: #0f1a18; border-color: rgba(43,58,66,.2);
  rotate: 2.5deg; animation: none; box-shadow: 0 26px 56px rgba(15,35,30,.34);
}
.hv-dual .stage-phone img { border-radius: 20px; }
.hv-dual .hero-badge {
  left: 5%; right: auto; top: auto; bottom: 9%; width: 86px; height: 86px;
  border-radius: 50%; background: #fff; color: var(--pri-deep); border: 1px solid #dfe7e3;
  rotate: -5deg; box-shadow: 0 14px 30px rgba(15,35,30,.16);
}
.hv-dual .hero-badge strong { font-size: 19px; }
.hv-dual .hero-badge span { color: var(--mute); }
.hv-dual .hero-strip {
  left: 4%; right: 4%; bottom: 2%; justify-content: center; gap: 6px; padding: 7px 10px;
  border-radius: 999px; background: #fff; border: 1px solid #dfe7e3;
  box-shadow: 0 12px 26px rgba(15,35,30,.12);
}
.hv-dual .hero-strip span:first-child { background: var(--pri); color: #fff; }

@media (max-width: 640px) {
  .hv-dual .hero-grid { grid-template-columns: 1fr; gap: 16px; }
  .hv-dual .hero-visual { min-height: 404px; }
  .hv-dual .hero-visual::before { display: none; }
  .hv-dual .hero-visual::after { display: none; }
  .hv-dual .stage-phone { width: min(158px, 46%); justify-self: center; margin-right: 0; margin-top: 0; }
  .hv-dual .hero-badge { display: grid; left: 8px; right: auto; bottom: 76px; width: 58px; height: 58px; }
  .hv-dual .hero-badge strong { font-size: 14px; }
  .hv-dual .hero-strip { left: 8px; right: 8px; bottom: 6px; padding: 6px 8px; gap: 4px; }
  .hv-dual .hero-strip span { padding: 3px 7px; font-size: 10px; }
}