*{box-sizing:border-box}
:root{
  --bg:#f6f8fb;
  --text:#0c1725;
  --muted:#758296;
  --line:#e4e9ef;
  --blue:#2e6bff;
  --blue2:#5d8cff;
  --dark:#08111d;
}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--text);
  background:var(--bg);
}
a{text-decoration:none;color:inherit}
button{font:inherit}
.shell{width:min(1180px,calc(100% - 32px));margin:auto}

.header{
  position:sticky;top:0;z-index:50;
  border-bottom:1px solid rgba(228,233,239,.7);
  background:rgba(246,248,251,.86);
  backdrop-filter:blur(18px);
}
.nav{height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{
  width:58px;height:58px;object-fit:contain;display:block;
  filter:drop-shadow(0 8px 16px rgba(12,23,37,.14));
}
.brand strong,.brand span{display:block}
.brand strong{font-size:17px}
.brand span{margin-top:2px;color:var(--muted);font-size:12px}
.nav-links{display:flex;gap:30px;color:#566478;font-size:14px}
.nav-cta{padding:11px 18px;border-radius:12px;background:var(--dark);color:#fff;font-weight:750;font-size:14px}

.hero{
  position:relative;
  overflow:hidden;
  padding:78px 0 88px;
  background:
    linear-gradient(180deg,#fbfdff 0%,#f7faff 62%,#f6f8fb 100%);
}
.hero-light{
  position:absolute;border-radius:50%;filter:blur(60px);pointer-events:none;
}
.hero-light-a{width:580px;height:580px;right:8%;top:30px;background:rgba(76,138,255,.20)}
.hero-light-b{width:360px;height:360px;left:-90px;top:180px;background:rgba(88,150,255,.10)}
.hero-inner{
  position:relative;z-index:2;
  min-height:610px;
  display:grid;
  grid-template-columns:1.02fr .98fr;
  align-items:center;
  gap:60px;
}
.official-chip{
  display:inline-flex;align-items:center;gap:9px;
  padding:8px 12px;
  border-radius:999px;
  background:#fff;
  border:1px solid var(--line);
  box-shadow:0 8px 24px rgba(12,23,37,.05);
  font-size:12px;font-weight:750;color:#4e5d72;
}
.official-chip span{width:7px;height:7px;border-radius:50%;background:#32c887;box-shadow:0 0 0 5px rgba(50,200,135,.10)}
.hero h1{margin:24px 0 18px}
.hero h1 em{
  display:block;
  margin-bottom:13px;
  font-size:20px;
  font-style:normal;
  letter-spacing:4px;
  color:#3d6ecb;
  font-weight:850;
}
.hero h1 strong{
  display:block;
  font-size:clamp(54px,6vw,78px);
  line-height:1.05;
  letter-spacing:-3px;
  font-weight:850;
}
.hero-desc{
  max-width:590px;
  margin:0;
  color:#6d7a8e;
  font-size:16px;
  line-height:1.85;
}
.device-chip{
  display:inline-block;margin-top:23px;
  padding:10px 13px;
  border-radius:11px;
  background:#fff;
  border:1px solid var(--line);
  color:#6d7a8e;font-size:12px;
}
.download-block{margin-top:18px;max-width:540px}
.main-download{
  min-height:72px;padding:14px 22px;
  display:flex;align-items:center;gap:14px;
  border-radius:17px;color:#fff;
  background:linear-gradient(135deg,var(--blue),var(--blue2));
  box-shadow:0 18px 38px rgba(46,107,255,.22);
  transition:.2s ease;
}
.main-download:hover,.sub-downloads a:hover{transform:translateY(-2px)}
.download-icon{font-size:28px}
.main-download small,.main-download b,.sub-downloads small,.sub-downloads b{display:block}
.main-download small{font-size:11px;color:#dce7ff;margin-bottom:3px}
.main-download b{font-size:16px}
.sub-downloads{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}
.sub-downloads a{
  min-height:66px;padding:12px 16px;
  display:flex;align-items:center;gap:13px;
  border-radius:16px;background:#fff;
  border:1px solid var(--line);
  transition:.2s ease;
}
.platform{
  width:38px;height:38px;border-radius:12px;
  display:grid;place-items:center;
  background:#eef3fb;
  font-size:20px;font-weight:850;
}
.platform.android{font-size:15px}
.sub-downloads small{font-size:11px;color:#8491a3;margin-bottom:3px}
.sub-downloads b{font-size:15px}
.meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:18px;color:#8693a5;font-size:12px}
.meta b{color:#465469}.meta i{width:3px;height:3px;border-radius:50%;background:#b1bbc7}.verified{color:#348d68}

.hero-visual{position:relative;min-height:580px;display:flex;align-items:center;justify-content:center}
.phone-wrap{position:relative;z-index:2}
.phone-shadow{
  position:absolute;left:50%;bottom:-28px;transform:translateX(-50%);
  width:250px;height:44px;border-radius:50%;
  background:rgba(14,44,92,.18);filter:blur(22px);
}
.phone{
  width:314px;height:626px;
  padding:9px;
  border-radius:48px;
  background:linear-gradient(145deg,#1b2533,#03070c);
  border:1px solid rgba(255,255,255,.22);
  box-shadow:0 36px 82px rgba(29,60,111,.24);
  transform:rotate(4deg);
}
.speaker{
  width:106px;height:26px;
  margin:0 auto -14px;
  position:relative;z-index:3;
  background:#02060b;border-radius:0 0 17px 17px;
}
.screen{
  height:100%;border-radius:39px;
  padding:30px 24px;
  color:var(--text);
  background:
    radial-gradient(circle at 50% 24%,rgba(67,132,255,.14),transparent 28%),
    linear-gradient(180deg,#ffffff,#fbfcff);
}
.screen-brand{display:flex;align-items:center;gap:8px;color:#6d7a8e;font-size:11px}
.screen-brand img{width:24px;height:24px;object-fit:contain}
.screen-main{text-align:center;margin-top:88px}
.app-icon{
  width:142px;height:142px;
  object-fit:contain;
  display:block;
  margin:0 auto;
  filter:drop-shadow(0 20px 28px rgba(26,62,116,.22));
}
.screen-main h3{margin:22px 0 5px;font-size:27px}
.screen-main p{margin:0;color:#9aa6b6;font-size:12px}
.screen-button{
  margin-top:112px;
  padding:16px;
  border-radius:15px;
  text-align:center;
  color:#fff;
  font-size:14px;
  font-weight:800;
  background:linear-gradient(135deg,#2e6bff,#648fff);
}
.float-card{
  position:absolute;z-index:4;
  display:flex;align-items:center;gap:10px;
  padding:12px 14px;
  border-radius:15px;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(16px);
  box-shadow:0 18px 46px rgba(29,60,111,.16);
}
.float-card small,.float-card strong{display:block}
.float-card small{font-size:10px;color:#8793a3}
.float-card strong{font-size:13px;margin-top:2px}
.dot{
  width:30px;height:30px;border-radius:9px;
  display:grid;place-items:center;font-weight:850;
}
.dot.green{background:#ebfff6;color:#1d9d6a}
.dot.blue{background:#edf3ff;color:#2e6bff}
.float-card-one{left:3%;top:120px}
.float-card-two{right:0;bottom:95px}

.trust{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:20px}
.trust article{
  display:flex;gap:14px;align-items:flex-start;
  padding:22px;border-radius:18px;
  background:#fff;border:1px solid var(--line);
}
.trust article>span{font-size:11px;letter-spacing:1px;color:#2e6bff;font-weight:850;padding-top:2px}
.trust strong{font-size:14px}
.trust p{margin:5px 0 0;color:var(--muted);font-size:12px;line-height:1.65}

.section{padding-top:92px}
.section-kicker{color:#2e6bff;font-size:11px;letter-spacing:2.2px;font-weight:850}
.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;margin-top:8px}
.section-heading h2,.download-section h2{margin:0;font-size:clamp(32px,4vw,46px);letter-spacing:-1.4px}
.section-heading p,.download-section p{margin:10px 0 0;color:var(--muted);line-height:1.75}
.tabs{display:inline-flex;gap:5px;padding:5px;border-radius:13px;background:#e8edf4}
.tab{border:0;background:transparent;padding:10px 18px;border-radius:10px;color:#647287;font-weight:750;cursor:pointer}
.tab.active{background:#fff;color:var(--text);box-shadow:0 6px 18px rgba(12,23,37,.07)}
.tutorial{display:none}.tutorial.active{display:block}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:28px}
.step{padding:18px;border-radius:22px;background:#fff;border:1px solid var(--line);box-shadow:0 16px 40px rgba(12,23,37,.035)}
.step-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.step-top b{font-size:20px}.step-top span{font-size:9px;letter-spacing:1.6px;color:#8a96a6}
.shot{
  aspect-ratio:4/3;display:grid;place-items:center;
  border-radius:17px;
  background:linear-gradient(135deg,#f1f5fb,#f9fbfd);
  border:1px dashed #ccd6e3;
  color:#95a1b1;font-size:12px;
}
.step h3{margin:18px 0 7px;font-size:17px}
.step p{margin:0;color:var(--muted);font-size:13px;line-height:1.75}

.download-section{
  margin-top:88px;
  padding:48px 52px;
  display:flex;align-items:center;justify-content:space-between;gap:40px;
  border-radius:28px;
  color:#fff;
  background:
    radial-gradient(circle at 86% 16%,rgba(65,130,255,.24),transparent 26%),
    linear-gradient(135deg,#08111d,#10213a);
  box-shadow:0 26px 66px rgba(8,17,29,.12);
}
.download-section>div>span{font-size:10px;letter-spacing:2px;color:#91aff7;font-weight:850}
.download-section h2{margin-top:10px}
.download-section p{color:#c5cfdb;max-width:620px}
.download-section a{display:inline-block;margin-top:18px;color:#aac4ff;font-size:13px;font-weight:750}
.qr{
  width:166px;height:166px;
  display:grid;place-items:center;
  position:relative;
  border-radius:18px;background:#fff;
  flex:0 0 auto;
}
.qr-grid{
  position:absolute;inset:18px;opacity:.14;
  background-image:linear-gradient(90deg,#08111d 50%,transparent 50%),linear-gradient(#08111d 50%,transparent 50%);
  background-size:15px 15px;
}
.qr small{position:relative;z-index:2;padding:7px 9px;border-radius:8px;background:rgba(255,255,255,.92);color:#687587}

.faq{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:28px}
.faq details{padding:21px 22px;border-radius:17px;background:#fff;border:1px solid var(--line)}
.faq summary{cursor:pointer;font-weight:750}
.faq p{margin:13px 0 0;color:var(--muted);font-size:13px;line-height:1.75}

footer{margin-top:92px;border-top:1px solid var(--line)}
.footer{min-height:128px;display:flex;align-items:center;justify-content:space-between;gap:20px;color:#929eae;font-size:12px}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-brand img{width:44px;height:44px;object-fit:contain;filter:drop-shadow(0 6px 10px rgba(12,23,37,.10))}
.footer-brand strong,.footer-brand span{display:block}
.footer-brand strong{font-size:13px;color:#2b3747}.footer-brand span{margin-top:2px}

@media(max-width:980px){
  .nav-links{display:none}
  .hero-inner{grid-template-columns:1fr}
  .hero-showcase{display:none}
  .trust{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
}
@media(max-width:680px){
  .shell,.nav{width:min(100% - 20px,1180px)}
  .nav{height:68px}
  .brand img{width:48px;height:48px}
  .nav-cta{padding:10px 14px}
  .hero{padding:48px 0 58px}
  .hero-inner{min-height:auto}
  .hero h1 strong{font-size:45px;letter-spacing:-1.8px}
  .hero-desc{font-size:14px}
  .sub-downloads{grid-template-columns:1fr}
  .section{padding-top:68px}
  .section-heading{align-items:flex-start;flex-direction:column}
  .tabs{width:100%}.tab{flex:1}
  .download-section{margin-top:68px;padding:32px 22px;align-items:flex-start;flex-direction:column}
  .faq{grid-template-columns:1fr}
  .footer{align-items:flex-start;flex-direction:column;justify-content:center}
}

/* HD official logo rendering */
.brand img{
  width:60px;height:60px;object-fit:contain;
  border-radius:17px;
  filter:drop-shadow(0 10px 18px rgba(30,78,126,.16));
}
.app-icon{
  width:154px;height:154px;object-fit:contain;border-radius:36px;
  filter:drop-shadow(0 24px 34px rgba(30,78,126,.24));
}
.screen-brand img{width:25px;height:25px;border-radius:7px;object-fit:contain}
.footer-brand img{width:46px;height:46px;border-radius:13px;object-fit:contain}


/* === V6 Promotional banner hero === */
.banner-hero{
  margin-top:28px;
}
.banner-frame{
  overflow:hidden;
  border-radius:30px;
  background:#0f6fd8;
  box-shadow:0 24px 70px rgba(23,83,158,.18);
}
.promo-banner{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:16/10;
  object-fit:cover;
}
.download-dock{
  margin-top:18px;
  padding:24px 26px;
  display:grid;
  grid-template-columns:minmax(180px,.75fr) minmax(520px,1.8fr);
  gap:18px 28px;
  align-items:center;
  border-radius:22px;
  background:#fff;
  border:1px solid var(--line);
  box-shadow:0 16px 38px rgba(12,23,37,.055);
}
.download-dock-copy h2{
  margin:4px 0 5px;
  font-size:24px;
  letter-spacing:-.5px;
}
.download-dock-copy p{
  margin:0;
  color:var(--muted);
  font-size:12px;
}
.dock-kicker{
  color:#2e6bff;
  font-size:9px;
  letter-spacing:1.8px;
  font-weight:850;
}
.dock-actions{
  display:grid;
  grid-template-columns:1.15fr 1fr 1fr;
  gap:10px;
}
.dock-primary,.dock-platform{
  min-height:62px;
  display:flex;
  align-items:center;
  gap:11px;
  padding:11px 15px;
  border-radius:15px;
  transition:.2s ease;
}
.dock-primary:hover,.dock-platform:hover{
  transform:translateY(-2px);
}
.dock-primary{
  color:#fff;
  background:linear-gradient(135deg,#2e6bff,#5b8dff);
  box-shadow:0 14px 28px rgba(46,107,255,.18);
}
.dock-platform{
  background:#f8fafc;
  border:1px solid #e4e9ef;
}
.dock-arrow{
  font-size:24px;
}
.dock-platform-icon{
  width:34px;height:34px;
  display:grid;place-items:center;
  border-radius:10px;
  background:#eef3fb;
  font-size:18px;font-weight:850;
}
.dock-platform-icon.android{font-size:14px}
.dock-primary small,.dock-primary strong,
.dock-platform small,.dock-platform strong{
  display:block;
}
.dock-primary small{
  color:#dbe6ff;
  font-size:10px;
  margin-bottom:2px;
}
.dock-primary strong{font-size:14px}
.dock-platform small{
  color:#8b97a7;
  font-size:10px;
  margin-bottom:2px;
}
.dock-platform strong{font-size:14px}
.dock-meta{
  grid-column:1/-1;
  display:flex;
  align-items:center;
  gap:10px;
  color:#8995a5;
  font-size:11px;
  border-top:1px solid #edf0f4;
  padding-top:14px;
}
.dock-meta b{color:#4b586b}
.dock-meta i{
  width:3px;height:3px;border-radius:50%;
  background:#b9c2cd;
}

@media(max-width:980px){
  .download-dock{
    grid-template-columns:1fr;
  }
  .dock-actions{
    grid-template-columns:1fr;
  }
  .dock-meta{grid-column:auto}
}
@media(max-width:680px){
  .banner-hero{margin-top:14px}
  .banner-frame{border-radius:20px}
  .promo-banner{
    aspect-ratio:4/3;
    object-fit:cover;
    object-position:center;
  }
  .download-dock{
    padding:18px;
    border-radius:18px;
  }
}


/* === V7 Premium download suite === */
.download-suite{
  margin-top:20px;
  overflow:hidden;
  border-radius:26px;
  background:
    radial-gradient(circle at 8% 0%,rgba(46,107,255,.065),transparent 28%),
    #fff;
  border:1px solid #e3e9f1;
  box-shadow:
    0 22px 54px rgba(20,48,86,.08),
    inset 0 1px 0 rgba(255,255,255,.8);
}
.download-suite-top{
  min-height:102px;
  padding:22px 26px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.download-brand-block{
  display:flex;
  align-items:center;
  gap:15px;
}
.download-mini-logo{
  width:56px;
  height:56px;
  flex:0 0 auto;
  border-radius:17px;
  overflow:hidden;
  background:#f5f9ff;
  box-shadow:
    0 10px 24px rgba(43,104,255,.13),
    inset 0 0 0 1px rgba(74,126,210,.10);
}
.download-mini-logo img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.suite-kicker{
  display:block;
  margin-bottom:4px;
  color:#2e6bff;
  font-size:9px;
  font-weight:900;
  letter-spacing:2px;
}
.download-brand-block h2{
  margin:0;
  font-size:25px;
  letter-spacing:-.7px;
}
.download-brand-block p{
  margin:5px 0 0;
  color:#8090a4;
  font-size:12px;
}
.suite-badge{
  display:flex;
  align-items:center;
  gap:8px;
  padding:9px 12px;
  border-radius:999px;
  background:#f5fbf8;
  color:#377b5e;
  border:1px solid #dceee5;
  font-size:11px;
  font-weight:750;
}
.suite-badge-dot{
  width:7px;height:7px;
  border-radius:50%;
  background:#35bf80;
  box-shadow:0 0 0 5px rgba(53,191,128,.10);
}

.download-suite-main{
  padding:0 26px 22px;
  display:grid;
  grid-template-columns:1.35fr 1fr 1fr;
  gap:12px;
}
.suite-primary,.suite-platform{
  min-height:108px;
  position:relative;
  display:flex;
  align-items:center;
  gap:14px;
  border-radius:19px;
  transition:
    transform .22s ease,
    box-shadow .22s ease,
    border-color .22s ease;
}
.suite-primary:hover,.suite-platform:hover{
  transform:translateY(-3px);
}
.suite-primary{
  padding:20px 22px;
  color:#fff;
  background:
    radial-gradient(circle at 82% 20%,rgba(255,255,255,.18),transparent 25%),
    linear-gradient(135deg,#2465f5,#4f83ff);
  box-shadow:0 18px 34px rgba(46,107,255,.22);
}
.suite-primary:hover{
  box-shadow:0 22px 42px rgba(46,107,255,.28);
}
.suite-primary-icon{
  width:48px;height:48px;
  flex:0 0 auto;
  display:grid;place-items:center;
  border-radius:15px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.16);
  font-size:26px;
  font-weight:700;
}
.suite-primary-copy{
  min-width:0;
}
.suite-primary-copy small,
.suite-primary-copy strong,
.suite-primary-copy em{
  display:block;
}
.suite-primary-copy small{
  margin-bottom:3px;
  color:#dce7ff;
  font-size:10px;
  font-weight:650;
}
.suite-primary-copy strong{
  font-size:20px;
  letter-spacing:-.3px;
}
.suite-primary-copy em{
  margin-top:4px;
  color:#d4e1ff;
  font-size:10px;
  font-style:normal;
}
.suite-primary-arrow{
  margin-left:auto;
  padding-left:10px;
  font-size:22px;
  opacity:.8;
}

.suite-platform{
  padding:18px;
  background:
    linear-gradient(180deg,#fbfcfe,#f7f9fc);
  border:1px solid #e1e7ef;
  box-shadow:0 8px 20px rgba(23,45,75,.035);
}
.suite-platform:hover{
  border-color:#cfd9e7;
  box-shadow:0 14px 26px rgba(23,45,75,.07);
}
.suite-platform-icon{
  width:48px;height:48px;
  flex:0 0 auto;
  display:grid;place-items:center;
  border-radius:15px;
  background:#fff;
  border:1px solid #e5eaf1;
  box-shadow:0 7px 16px rgba(18,43,77,.055);
  color:#111d2d;
  font-size:22px;
  font-weight:850;
}
.suite-platform-icon.android{
  font-size:16px;
  color:#2d6a44;
}
.suite-platform-copy small,
.suite-platform-copy strong,
.suite-platform-copy em{
  display:block;
}
.suite-platform-copy small{
  margin-bottom:3px;
  color:#94a0b0;
  font-size:9px;
  letter-spacing:.3px;
}
.suite-platform-copy strong{
  color:#152236;
  font-size:15px;
}
.suite-platform-copy em{
  margin-top:4px;
  color:#8794a6;
  font-size:10px;
  font-style:normal;
}
.suite-card-arrow{
  margin-left:auto;
  align-self:flex-start;
  color:#9ba6b5;
  font-size:15px;
}

.download-suite-footer{
  min-height:54px;
  padding:0 26px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  border-top:1px solid #ebeff4;
  background:rgba(248,250,252,.72);
}
.suite-status{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
  color:#8491a2;
  font-size:11px;
}
.suite-status b{
  color:#445165;
}
.suite-status-item{
  display:flex;
  align-items:center;
  gap:5px;
  color:#5c7a69;
}
.status-icon{
  width:18px;height:18px;
  display:grid;place-items:center;
  border-radius:6px;
  background:#eaf9f1;
  color:#24a96c;
  font-style:normal;
  font-size:10px;
  font-weight:900;
}
.suite-divider{
  width:3px;height:3px;
  border-radius:50%;
  background:#bcc5d0;
}
.suite-guide-link{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  gap:7px;
  color:#2e6bff;
  font-size:11px;
  font-weight:750;
}
.suite-guide-link span{
  font-size:14px;
}

@media(max-width:980px){
  .download-suite-main{
    grid-template-columns:1fr;
  }
}
@media(max-width:680px){
  .download-suite{
    border-radius:20px;
  }
  .download-suite-top{
    padding:18px;
  }
  .download-mini-logo{
    width:48px;height:48px;border-radius:14px;
  }
  .download-brand-block h2{
    font-size:20px;
  }
  .suite-badge{
    display:none;
  }
  .download-suite-main{
    padding:0 18px 18px;
  }
  .suite-primary,.suite-platform{
    min-height:86px;
  }
  .download-suite-footer{
    padding:13px 18px;
    align-items:flex-start;
    flex-direction:column;
  }
}


/* === V9 clickable banner download hotspots === */
.interactive-banner{
  position:relative;
}
.banner-download-hotspot{
  position:absolute;
  z-index:5;
  display:block;
  border-radius:16px;
  cursor:pointer;
  transition:
    transform .22s ease,
    box-shadow .22s ease,
    background-color .22s ease;
  outline:none;
}

/* 对应 1536×1024 宣传图中两个白色下载按钮的位置 */
.ios-hotspot{
  left:14.7%;
  top:49.1%;
  width:22.4%;
  height:8.2%;
}
.android-hotspot{
  left:14.7%;
  top:59.0%;
  width:22.4%;
  height:8.2%;
}

.banner-download-hotspot:hover{
  transform:translateY(-2px) scale(1.015);
  background:rgba(255,255,255,.06);
  box-shadow:
    0 12px 30px rgba(0,41,110,.18),
    inset 0 0 0 2px rgba(255,255,255,.18);
}
.banner-download-hotspot:active{
  transform:translateY(0) scale(.995);
}
.banner-download-hotspot:focus-visible{
  box-shadow:
    0 0 0 3px rgba(255,255,255,.75),
    0 0 0 6px rgba(46,107,255,.55);
}

.hotspot-glow{
  position:absolute;
  inset:0;
  border-radius:inherit;
  opacity:0;
  background:linear-gradient(110deg,transparent 15%,rgba(255,255,255,.24) 48%,transparent 80%);
  transform:translateX(-120%);
  pointer-events:none;
}
.banner-download-hotspot:hover .hotspot-glow{
  opacity:1;
  animation:bannerShine .9s ease;
}
@keyframes bannerShine{
  from{transform:translateX(-120%)}
  to{transform:translateX(120%)}
}

@media(max-width:680px){
  /* 移动端维持与缩放后的整张宣传图同步 */
  .ios-hotspot,.android-hotspot{
    border-radius:10px;
  }
}

/* V11 - iPhone step-by-step tutorial */
.guide-alert{
  margin-top:28px;padding:18px 20px;display:flex;align-items:flex-start;gap:14px;
  border:1px solid #dce7ff;border-radius:18px;background:linear-gradient(135deg,#f5f8ff,#fff);
}
.guide-alert-icon{
  width:34px;height:34px;flex:0 0 auto;display:grid;place-items:center;border-radius:11px;
  background:#2e6bff;color:#fff;font-weight:900;font-size:18px;box-shadow:0 10px 24px rgba(46,107,255,.2)
}
.guide-alert strong{display:block;font-size:15px}.guide-alert p{margin:5px 0 0;color:var(--muted);font-size:13px;line-height:1.7}
.ios-steps{grid-template-columns:repeat(5,minmax(0,1fr));align-items:stretch}
.ios-steps .step{display:flex;flex-direction:column}
.ios-steps .shot{aspect-ratio:9/16;background:#f5f7fb;border-style:solid;overflow:hidden}
.shot-image img{width:100%;height:100%;display:block;object-fit:cover}
.ios-steps .portrait-shot img{object-position:center top}
.ios-steps .step h3{font-size:15px}.ios-steps .step p{font-size:12px}
.ios-keypoints{
  margin-top:18px;padding:18px 20px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  border-radius:18px;background:#0d1b2e;color:#dbe6f7;
}
.ios-keypoints strong{color:#fff;margin-right:6px}.ios-keypoints span{padding:8px 10px;border-radius:10px;background:rgba(255,255,255,.07);font-size:12px}
@media(max-width:1180px){.ios-steps{grid-template-columns:repeat(3,1fr)}}
@media(max-width:760px){
  .ios-steps{grid-template-columns:1fr}
  .ios-steps .step{padding:16px}
  .ios-steps .shot{aspect-ratio:auto;min-height:0}
  .shot-image img{height:auto;object-fit:contain}
  .ios-steps .step h3{font-size:18px}
  .ios-steps .step p{font-size:13px}
  .guide-alert{padding:16px}
  .ios-keypoints{align-items:flex-start;flex-direction:column}
}

/* V12 - show iOS tutorial screenshots completely, never crop */
.ios-steps .shot.shot-image{
  aspect-ratio:auto;
  min-height:0;
  background:#fff;
  display:flex;
  align-items:flex-start;
  justify-content:center;
}
.ios-steps .shot.shot-image img{
  width:100%;
  height:auto;
  max-height:none;
  object-fit:contain;
  object-position:center top;
}


/* V13 - all five iOS tutorial images use complete proportional display */
.ios-steps .shot.shot-image{
  aspect-ratio:auto !important;
  min-height:0 !important;
  height:auto !important;
  overflow:hidden;
  background:#fff;
  padding:0;
}
.ios-steps .shot.shot-image img{
  display:block;
  width:100%;
  height:auto !important;
  max-width:100%;
  max-height:none !important;
  object-fit:contain !important;
  object-position:center top !important;
}
@media(max-width:760px){
  .ios-steps .shot.shot-image img{width:100%;height:auto !important;}
}

/* === V14 Mobile trust cards: three compact cards in one row === */
@media (max-width:680px){
  .trust{
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:7px;
    margin-top:12px;
  }
  .trust article{
    min-width:0;
    min-height:82px;
    padding:12px 9px;
    gap:7px;
    border-radius:14px;
    align-items:flex-start;
  }
  .trust article>span{
    flex:0 0 auto;
    font-size:9px;
    letter-spacing:.3px;
    padding-top:1px;
  }
  .trust article>div{
    min-width:0;
  }
  .trust strong{
    display:block;
    font-size:12px;
    line-height:1.25;
    white-space:nowrap;
  }
  .trust p{
    margin-top:4px;
    font-size:9.5px;
    line-height:1.45;
  }
}

@media (max-width:390px){
  .trust{gap:5px;}
  .trust article{
    padding:10px 7px;
    gap:5px;
    border-radius:12px;
  }
  .trust article>span{font-size:8px;}
  .trust strong{font-size:11px;}
  .trust p{font-size:8.5px;line-height:1.35;}
}

/* V18 Android tutorial */
.android-steps .shot.shot-image{aspect-ratio:auto;min-height:0;padding:0;overflow:hidden;background:#fff;border-style:solid;display:block}
.android-steps .shot.shot-image img{display:block;width:100%;height:auto;object-fit:contain;object-position:center top}
.android-keypoints{margin-top:18px}
@media(max-width:760px){
  .android-steps{grid-template-columns:1fr}
  .android-steps .step{padding:16px}
  .android-steps .shot.shot-image img{width:100%;height:auto}
}

/* V19 - Android tutorial redesign */
.android-guide-head{
  margin-top:24px;padding:18px 20px;display:flex;align-items:center;gap:14px;
  border:1px solid #dbe7f7;border-radius:18px;background:linear-gradient(135deg,#f7fbff,#eef6ff);
}
.android-guide-icon{
  width:42px;height:42px;flex:0 0 42px;border-radius:13px;display:grid;place-items:center;
  background:#1f7ae0;color:#fff;font-size:18px;font-weight:900;box-shadow:0 10px 24px rgba(31,122,224,.22)
}
.android-guide-head strong{font-size:16px;color:#10223d}
.android-guide-head p{margin:4px 0 0;color:#6e7f96;font-size:13px}
.android-redesign{margin-top:18px;gap:18px}
.android-step-card{padding:0;overflow:hidden;border-radius:24px;border:1px solid #dbe4ef;box-shadow:0 18px 42px rgba(27,56,91,.08)}
.android-step-badge{display:flex;align-items:center;gap:10px;padding:15px 16px 12px;background:#fff}
.android-step-badge b{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:#1677df;color:#fff;font-size:15px;box-shadow:0 8px 20px rgba(22,119,223,.22)}
.android-step-badge span{font-size:14px;font-weight:800;color:#15243a}
.android-redesign .android-shot{border:0;border-radius:0;background:#f7f9fc;padding:0;overflow:hidden}
.android-redesign .android-shot img{width:100%;height:auto;display:block;object-fit:contain;object-position:center top}
.android-step-copy{padding:16px 17px 19px}
.android-step-copy h3{margin:0 0 7px;font-size:17px;color:#0d1d31}
.android-step-copy p{margin:0;color:#68788f;font-size:13px;line-height:1.7}
.android-step-copy p strong{color:#1677df}
.android-tipbar{margin-top:18px;padding:15px 17px;border-radius:16px;background:#0f1e33;color:#fff;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.android-tipbar strong{font-size:14px;margin-right:4px}.android-tipbar span{font-size:12px;color:#dce8f7}
@media(max-width:760px){
  .android-guide-head{padding:14px 15px;border-radius:16px}
  .android-redesign{grid-template-columns:1fr;gap:14px}
  .android-step-card{border-radius:18px}
  .android-step-badge{padding:12px 13px 10px}
  .android-step-badge b{width:34px;height:34px;border-radius:10px}
  .android-step-copy{padding:14px 14px 17px}
  .android-step-copy h3{font-size:16px}
  .android-tipbar{gap:8px;padding:13px 14px}
  .android-tipbar strong{width:100%}
}

/* V20 - phone: force the three trust cards into one compact horizontal row */
@media (max-width: 760px){
  .trust{
    display:grid !important;
    grid-template-columns:repeat(3,minmax(0,1fr)) !important;
    gap:6px !important;
    margin-top:12px !important;
  }
  .trust article{
    display:flex !important;
    flex-direction:column !important;
    justify-content:center !important;
    align-items:center !important;
    text-align:center !important;
    min-width:0 !important;
    min-height:68px !important;
    padding:9px 4px !important;
    gap:3px !important;
    border-radius:12px !important;
  }
  .trust article>span{
    font-size:9px !important;
    line-height:1 !important;
    padding:0 !important;
  }
  .trust article>div{min-width:0 !important;width:100% !important;}
  .trust strong{
    display:block !important;
    font-size:11px !important;
    line-height:1.2 !important;
    white-space:nowrap !important;
  }
  .trust p{display:none !important;}
}
@media (max-width: 360px){
  .trust{gap:4px !important;}
  .trust article{padding:8px 2px !important;min-height:62px !important;}
  .trust strong{font-size:10px !important;}
  .trust article>span{font-size:8px !important;}
}


/* === V27: remove top-right CTA and make hero download hotspots obvious === */
.nav{justify-content:flex-start}
.nav-links{margin-left:auto}

.banner-download-hotspot{
  border:2px solid rgba(255,255,255,.92);
  background:rgba(255,255,255,.07);
  box-shadow:0 0 0 0 rgba(255,255,255,.72),0 10px 28px rgba(4,54,135,.18);
  animation:downloadButtonBounce 1.45s ease-in-out infinite;
  transform-origin:center;
  will-change:transform,box-shadow;
}
.android-hotspot{animation-delay:.18s}
.banner-download-hotspot::before{
  content:"";
  position:absolute;
  inset:-5px;
  border:2px solid rgba(255,255,255,.72);
  border-radius:20px;
  opacity:.15;
  animation:downloadRing 1.45s ease-out infinite;
  pointer-events:none;
}
.banner-download-hotspot::after{
  content:"点这里下载";
  position:absolute;
  right:-8px;
  top:50%;
  transform:translate(100%,-50%);
  padding:5px 8px;
  border-radius:999px;
  white-space:nowrap;
  color:#fff;
  background:#ff4d3f;
  font-size:10px;
  line-height:1;
  font-weight:800;
  letter-spacing:.2px;
  box-shadow:0 7px 18px rgba(174,31,20,.24);
  pointer-events:none;
}
@keyframes downloadButtonBounce{
  0%,100%{transform:translateY(0) scale(1);box-shadow:0 0 0 0 rgba(255,255,255,.58),0 10px 28px rgba(4,54,135,.18)}
  50%{transform:translateY(-5px) scale(1.035);box-shadow:0 0 0 7px rgba(255,255,255,.12),0 16px 34px rgba(4,54,135,.30)}
}
@keyframes downloadRing{
  0%{transform:scale(.98);opacity:.52}
  72%,100%{transform:scale(1.12);opacity:0}
}
.banner-download-hotspot:hover{
  animation-play-state:paused;
  transform:translateY(-5px) scale(1.04);
  background:rgba(255,255,255,.13);
  box-shadow:0 16px 36px rgba(0,41,110,.30),inset 0 0 0 2px rgba(255,255,255,.24);
}
.banner-download-hotspot:active{animation:none;transform:scale(.98)}

@media(max-width:680px){
  .nav-links{margin-left:auto}
  .banner-download-hotspot{border-width:1.5px;animation-duration:1.35s}
  .banner-download-hotspot::before{inset:-3px;border-width:1px;border-radius:13px}
  .banner-download-hotspot::after{
    content:"下载";
    right:2px;
    top:-5px;
    transform:translateY(-100%);
    padding:3px 5px;
    font-size:7px;
  }
  @keyframes downloadButtonBounce{
    0%,100%{transform:translateY(0) scale(1);box-shadow:0 0 0 0 rgba(255,255,255,.52),0 5px 14px rgba(4,54,135,.16)}
    50%{transform:translateY(-3px) scale(1.045);box-shadow:0 0 0 4px rgba(255,255,255,.11),0 9px 20px rgba(4,54,135,.26)}
  }
}

@media (prefers-reduced-motion:reduce){
  .banner-download-hotspot,.banner-download-hotspot::before{animation:none}
}

/* === V28: mobile-visible animated download buttons ===
   V27 animated only the transparent click layer, so the baked button pixels did not move.
   V28 draws a real visible button over the two banner buttons and animates that surface. */
.banner-download-hotspot{
  overflow:visible;
  text-decoration:none;
}
.hotspot-face{
  position:absolute;
  inset:0;
  box-sizing:border-box;
  display:flex;
  align-items:center;
  gap:10px;
  padding:7px 14px;
  border-radius:inherit;
  background:#fff;
  color:#14233a;
  box-shadow:0 8px 20px rgba(5,48,112,.16);
  pointer-events:none;
}
.hotspot-icon{
  flex:0 0 auto;
  width:28px;height:28px;
  display:grid;place-items:center;
  font-size:18px;
  line-height:1;
  font-weight:900;
}
.apple-icon{color:#071a30;font-size:22px}
.apple-icon::before{content:"";font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
.apple-icon{font-size:0}
.android-icon{color:#16a34a;font-size:17px;transform:rotate(45deg)}
.hotspot-copy{display:flex;min-width:0;flex-direction:column;justify-content:center;line-height:1.08}
.hotspot-copy b{font-size:clamp(12px,1.3vw,18px);white-space:nowrap;font-weight:800;letter-spacing:-.2px}
.hotspot-copy small{margin-top:4px;font-size:clamp(8px,.75vw,11px);color:#7e8da2;white-space:nowrap}
.banner-download-hotspot::after{z-index:8}
.hotspot-glow{z-index:7}

@media(max-width:680px){
  /* Keep the clickable positions synced to the banner, but make the visible face strong enough to notice. */
  .banner-download-hotspot{
    border:0!important;
    background:transparent!important;
    box-shadow:none!important;
  }
  .hotspot-face{
    gap:5px;
    padding:3px 6px;
    border-radius:8px;
    box-shadow:0 5px 12px rgba(5,48,112,.25),0 0 0 1px rgba(255,255,255,.9);
  }
  .hotspot-icon{width:18px;height:18px;font-size:12px}
  .apple-icon{font-size:0}
  .apple-icon::before{font-size:15px}
  .android-icon{font-size:10px}
  .hotspot-copy b{font-size:8px;letter-spacing:-.15px}
  .hotspot-copy small{margin-top:2px;font-size:5.8px}
  .banner-download-hotspot::after{
    content:"点我下载";
    right:-4px;
    top:-2px;
    transform:translate(35%,-80%);
    padding:3px 5px;
    font-size:6px;
    box-shadow:0 4px 10px rgba(174,31,20,.28);
  }
  @keyframes downloadButtonBounce{
    0%,100%{transform:translateY(0) scale(1)}
    45%{transform:translateY(-4px) scale(1.07)}
    60%{transform:translateY(-2px) scale(1.04)}
  }
}

/* === V29: mobile download buttons match desktop emphasis === */
@media(max-width:680px){
  /* Keep the whole hero visible on phones so the button positions stay predictable. */
  .promo-banner{
    aspect-ratio:16/10 !important;
    object-fit:contain !important;
    object-position:center !important;
  }

  /* Make the two real HTML download buttons noticeably larger than the baked-in artwork. */
  .ios-hotspot{
    left:14.2% !important;
    top:48.0% !important;
    width:36.5% !important;
    height:10.2% !important;
  }
  .android-hotspot{
    left:14.2% !important;
    top:59.4% !important;
    width:36.5% !important;
    height:10.2% !important;
  }

  .banner-download-hotspot{
    border:0 !important;
    background:transparent !important;
    box-shadow:none !important;
    overflow:visible !important;
    animation:downloadButtonBounceMobile 1.25s ease-in-out infinite !important;
  }
  .android-hotspot{animation-delay:.16s !important}

  .hotspot-face{
    gap:6px !important;
    padding:4px 8px !important;
    border-radius:10px !important;
    background:#fff !important;
    box-shadow:0 5px 14px rgba(4,47,109,.28),0 0 0 2px rgba(79,155,255,.38) !important;
  }
  .hotspot-icon{
    width:20px !important;
    height:20px !important;
    font-size:12px !important;
  }
  .apple-icon::before{font-size:17px !important}
  .android-icon{font-size:11px !important}
  .hotspot-copy b{
    font-size:clamp(9px,2.65vw,12px) !important;
    letter-spacing:-.2px !important;
  }
  .hotspot-copy small{
    margin-top:2px !important;
    font-size:clamp(6px,1.7vw,8px) !important;
  }

  /* Same red hint badge placement as desktop. */
  .banner-download-hotspot::after{
    content:"点这里下载" !important;
    right:-5px !important;
    top:50% !important;
    transform:translate(100%,-50%) !important;
    padding:4px 6px !important;
    border-radius:999px !important;
    font-size:clamp(6px,1.65vw,8px) !important;
    line-height:1 !important;
    box-shadow:0 5px 12px rgba(174,31,20,.28) !important;
  }
  .banner-download-hotspot::before{
    inset:-3px !important;
    border-radius:13px !important;
  }

  @keyframes downloadButtonBounceMobile{
    0%,100%{transform:translateY(0) scale(1)}
    50%{transform:translateY(-4px) scale(1.045)}
  }
}