:root{
  --theme:#0B3D91;
  --theme-dark:#072b68;
  --theme-soft:#eaf1ff;
  --ink:#111827;
  --muted:#64748b;
  --line:#dce4ef;
  --surface:#ffffff;
  --page:#f5f7fb;
  --success:#138a5b;
  --radius:18px;
  --shadow:0 18px 48px rgba(15,23,42,.09);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--ink);
  background:var(--page);
  font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC",Arial,sans-serif;
  line-height:1.65;
}
body.drawer-open{overflow:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
.container{width:min(1180px,calc(100% - 40px));margin-inline:auto}
.topbar{
  position:relative;
  z-index:80;
  color:#dbeafe;
  background:#071c3e;
  font-size:13px;
}
.topbar .container{
  min-height:38px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}
.topbar .contact{display:flex;align-items:center;gap:22px}
.topbar a{transition:color .2s ease}
.topbar a:hover{color:#fff}
.header{
  position:relative;
  z-index:70;
  background:rgba(255,255,255,.98);
  border-bottom:1px solid rgba(220,228,239,.9);
  box-shadow:0 4px 18px rgba(15,23,42,.04);
}
.header-inner{
  min-height:78px;
  display:flex;
  align-items:center;
  gap:24px;
}
.logo{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  gap:11px;
  color:var(--theme);
  font-size:19px;
  font-weight:800;
  letter-spacing:.02em;
}
.logo img{
  width:42px;
  height:42px;
  object-fit:contain;
  border-radius:10px;
}
.main-nav{margin-left:auto;height:78px}
.nav-list{
  height:100%;
  display:flex;
  align-items:stretch;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
}
.nav-item{
  position:relative;
  display:flex;
  align-items:center;
}
.nav-link{
  height:100%;
  display:flex;
  align-items:center;
  padding:0 13px;
  font-size:15px;
  font-weight:650;
  white-space:nowrap;
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover,
.nav-item:focus-within>.nav-link{
  color:var(--theme);
  background:var(--theme-soft);
}
.has-arrow::after{
  width:6px;
  height:6px;
  margin:-4px 0 0 8px;
  border-right:1.5px solid currentColor;
  border-bottom:1.5px solid currentColor;
  content:"";
  transform:rotate(45deg);
}
.dropdown-panel,
.mega-menu{
  position:absolute;
  top:100%;
  right:0;
  z-index:90;
  visibility:hidden;
  opacity:0;
  transform:translateY(8px);
  background:#fff;
  border:1px solid var(--line);
  border-radius:0 0 16px 16px;
  box-shadow:0 24px 50px rgba(15,23,42,.16);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
}
.nav-item:hover>.dropdown-panel,
.nav-item:hover>.mega-menu,
.nav-item:focus-within>.dropdown-panel,
.nav-item:focus-within>.mega-menu{
  visibility:visible;
  opacity:1;
  transform:translateY(0);
}
.dropdown-panel::before,
.mega-menu::before{
  position:absolute;
  right:0;
  bottom:100%;
  left:0;
  height:10px;
  content:"";
}
.dropdown-panel{
  width:330px;
  padding:12px;
}
.dropdown-panel>a:not(.mega-footer){
  display:flex;
  flex-direction:column;
  gap:2px;
  padding:11px 12px;
  border-radius:10px;
}
.dropdown-panel>a:not(.mega-footer):hover{background:var(--theme-soft)}
.dropdown-panel strong{
  overflow:hidden;
  font-size:14px;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.dropdown-panel small{color:var(--muted)}
.mega-menu{
  width:min(760px,calc(100vw - 32px));
  padding:18px;
}
.nav-item:nth-last-child(-n+3) .mega-menu{right:0}
.mega-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:10px;
}
.mega-grid+.mega-grid{
  margin-top:12px;
  padding-top:12px;
  border-top:1px solid var(--line);
}
.mega-grid>a{
  min-width:0;
  padding:11px;
  color:#334155;
  border-radius:11px;
  transition:background .2s ease,color .2s ease;
}
.mega-grid>a:hover{color:var(--theme);background:var(--theme-soft)}
.mega-card{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  align-items:center;
  gap:5px 10px;
  border:1px solid #edf1f6;
}
.mega-card img{
  grid-row:1/3;
  width:34px;
  height:34px;
  object-fit:contain;
  border-radius:8px;
}
.mega-card strong{
  min-width:0;
  overflow:hidden;
  color:#172033;
  font-size:14px;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.mega-card small{
  grid-column:2;
  color:var(--muted);
  font-size:12px;
  line-height:1.45;
}
.mega-footer{
  display:block;
  margin-top:14px;
  padding:11px 14px;
  color:var(--theme);
  background:var(--theme-soft);
  border-radius:10px;
  text-align:center;
  font-size:14px;
  font-weight:750;
}
.header-btns{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  gap:9px;
}
.member-btn,
.account-btn{
  display:inline-flex;
  min-height:40px;
  align-items:center;
  justify-content:center;
  padding:0 15px;
  border-radius:10px;
  font-size:14px;
  font-weight:750;
}
.member-btn{color:var(--theme);border:1px solid #b9cae8;background:#fff}
.account-btn{color:#fff;background:var(--theme)}
.hamburger{
  width:44px;
  height:42px;
  display:none;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
  padding:0;
  color:var(--ink);
  background:#fff;
  border:1px solid var(--line);
  border-radius:10px;
  cursor:pointer;
}
.hamburger span{
  width:20px;
  height:2px;
  display:block;
  background:currentColor;
  transition:transform .2s ease,opacity .2s ease;
}
.hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.drawer-overlay{
  position:fixed;
  inset:0;
  z-index:110;
  visibility:hidden;
  opacity:0;
  background:rgba(2,8,23,.58);
  backdrop-filter:blur(3px);
  transition:opacity .25s ease,visibility .25s ease;
}
.drawer-overlay.open{visibility:visible;opacity:1}
.mobile-drawer{
  position:fixed;
  top:0;
  right:0;
  bottom:0;
  z-index:120;
  width:min(410px,90vw);
  overflow-y:auto;
  background:#fff;
  box-shadow:-18px 0 60px rgba(2,8,23,.22);
  transform:translateX(105%);
  transition:transform .28s ease;
}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{
  position:sticky;
  top:0;
  z-index:2;
  min-height:72px;
  display:flex;
  align-items:center;
  gap:12px;
  padding:14px 18px;
  color:#fff;
  background:var(--theme);
}
.drawer-head strong{margin-right:auto}
.drawer-head>a{
  padding:7px 12px;
  border:1px solid rgba(255,255,255,.42);
  border-radius:8px;
}
.drawer-close{
  width:36px;
  height:36px;
  padding:0;
  color:#fff;
  background:rgba(255,255,255,.12);
  border:0;
  border-radius:50%;
  font-size:26px;
  line-height:1;
  cursor:pointer;
}
.drawer-menu{padding:12px 18px 28px}
.drawer-link,
.drawer-toggle{
  width:100%;
  min-height:49px;
  display:flex;
  align-items:center;
  padding:11px 4px;
  color:#172033;
  background:none;
  border:0;
  border-bottom:1px solid #edf1f6;
  text-align:left;
  font-weight:750;
  cursor:pointer;
}
.drawer-toggle::after{
  width:8px;
  height:8px;
  margin-left:auto;
  border-right:2px solid #64748b;
  border-bottom:2px solid #64748b;
  content:"";
  transform:rotate(45deg);
  transition:transform .2s ease;
}
.drawer-toggle.active::after{transform:rotate(225deg)}
.drawer-submenu{
  max-height:0;
  overflow:hidden;
  padding:0 10px;
  background:#f7f9fc;
  border-radius:0 0 10px 10px;
  transition:max-height .3s ease,padding .3s ease;
}
.drawer-submenu.open{max-height:720px;padding:8px 10px}
.drawer-submenu a{
  display:block;
  padding:9px 6px;
  color:#526177;
  border-bottom:1px dashed #dfe5ee;
  font-size:14px;
}
.drawer-submenu a:last-child{border-bottom:0}
.footer{
  color:#cbd5e1;
  background:#07152e;
}
.footer .container{padding-top:58px}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:44px;
}
.footer-brand{
  margin-bottom:13px;
  color:#fff;
  font-size:22px;
  font-weight:850;
}
.footer h3{
  margin:0 0 16px;
  color:#fff;
  font-size:16px;
}
.footer p{margin:0 0 12px;color:#94a3b8}
.footer-grid>div>a{
  display:block;
  width:max-content;
  max-width:100%;
  margin:0 0 9px;
  color:#cbd5e1;
}
.footer-grid>div>a:hover{color:#fff}
.footer-bottom{
  margin-top:42px;
  padding:21px 0;
  color:#8290a6;
  border-top:1px solid rgba(148,163,184,.18);
  font-size:13px;
  text-align:center;
}
.target-page-main.download-page-main{overflow:hidden}
.download-page-main .download-hero{
  position:relative;
  isolation:isolate;
  padding:84px 0 108px;
  color:#fff;
  background:
    radial-gradient(circle at 15% 22%,rgba(80,145,255,.35),transparent 27%),
    radial-gradient(circle at 88% 80%,rgba(31,196,151,.2),transparent 28%),
    linear-gradient(135deg,#071b40 0%,#0B3D91 56%,#102f67 100%);
}
.download-page-main .download-hero::before,
.download-page-main .download-hero::after{
  position:absolute;
  z-index:-1;
  content:"";
  border:1px solid rgba(255,255,255,.15);
  border-radius:50%;
}
.download-page-main .download-hero::before{
  width:420px;
  height:420px;
  top:-240px;
  right:8%;
}
.download-page-main .download-hero::after{
  width:250px;
  height:250px;
  bottom:-155px;
  left:9%;
}
.download-page-main .hero-copy{
  max-width:820px;
  margin:auto;
  text-align:center;
}
.download-page-main .eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-bottom:18px;
  padding:7px 13px;
  color:#dbeafe;
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.2);
  border-radius:999px;
  font-size:13px;
  font-weight:750;
  letter-spacing:.08em;
}
.download-page-main .eyebrow::before{
  width:7px;
  height:7px;
  background:#63e6be;
  border-radius:50%;
  content:"";
  box-shadow:0 0 0 5px rgba(99,230,190,.13);
}
.download-page-main .download-hero h1{
  margin:0;
  font-size:clamp(36px,6vw,68px);
  line-height:1.1;
  letter-spacing:-.04em;
}
.download-page-main .download-hero p{
  max-width:710px;
  margin:22px auto 0;
  color:#dbe7f8;
  font-size:18px;
}
.download-page-main .hero-actions{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:12px;
  margin-top:32px;
}
.download-page-main .primary-action,
.download-page-main .secondary-action{
  min-height:50px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:0 22px;
  border-radius:12px;
  font-weight:800;
}
.download-page-main .primary-action{color:var(--theme);background:#fff}
.download-page-main .secondary-action{
  color:#fff;
  border:1px solid rgba(255,255,255,.38);
  background:rgba(255,255,255,.08);
}
.download-page-main .security-strip{
  position:relative;
  z-index:2;
  width:min(980px,calc(100% - 40px));
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1px;
  margin:-37px auto 0;
  overflow:hidden;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:18px;
  box-shadow:var(--shadow);
}
.download-page-main .security-item{
  min-height:76px;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:11px;
  padding:16px;
  background:#fff;
  font-weight:750;
}
.download-page-main .security-item b{
  width:34px;
  height:34px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--theme);
  background:var(--theme-soft);
  border-radius:50%;
}
.download-page-main .section{padding:88px 0}
.download-page-main .section-white{background:#fff}
.download-page-main .section-heading{
  max-width:720px;
  margin:0 auto 40px;
  text-align:center;
}
.download-page-main .section-heading span{
  color:var(--theme);
  font-size:13px;
  font-weight:850;
  letter-spacing:.12em;
}
.download-page-main .section-heading h2{
  margin:8px 0 10px;
  font-size:clamp(28px,4vw,42px);
  line-height:1.2;
}
.download-page-main .section-heading p{margin:0;color:var(--muted)}
.download-page-main .download-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}
.download-page-main .download-card{
  position:relative;
  min-width:0;
  padding:28px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:0 10px 28px rgba(15,23,42,.05);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.download-page-main .download-card:hover{
  border-color:#b7c9ea;
  box-shadow:var(--shadow);
  transform:translateY(-5px);
}
.download-page-main .platform-icon{
  width:52px;
  height:52px;
  display:grid;
  place-items:center;
  margin-bottom:23px;
  color:#fff;
  background:var(--theme);
  border-radius:15px;
  font-size:20px;
  font-weight:900;
}
.download-page-main .download-card:nth-child(2) .platform-icon{background:#176b58}
.download-page-main .download-card:nth-child(3) .platform-icon{background:#6d3cb4}
.download-page-main .download-card h3{margin:0 0 8px;font-size:21px}
.download-page-main .download-card p{min-height:78px;margin:0;color:var(--muted)}
.download-page-main .card-action{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:21px;
  color:var(--theme);
  font-weight:800;
}
.download-page-main .card-action::after{content:"→";transition:transform .2s ease}
.download-page-main .card-action:hover::after{transform:translateX(4px)}
.download-page-main .steps{
  position:relative;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:18px;
}
.download-page-main .steps::before{
  position:absolute;
  top:28px;
  right:10%;
  left:10%;
  height:2px;
  background:#cedaf0;
  content:"";
}
.download-page-main .step{
  position:relative;
  z-index:1;
  padding:0 12px;
  text-align:center;
}
.download-page-main .step-number{
  width:58px;
  height:58px;
  display:grid;
  place-items:center;
  margin:0 auto 18px;
  color:#fff;
  background:var(--theme);
  border:7px solid var(--page);
  border-radius:50%;
  box-shadow:0 0 0 1px #b9cae8;
  font-weight:900;
}
.download-page-main .step h3{margin:0 0 7px;font-size:18px}
.download-page-main .step p{margin:0;color:var(--muted);font-size:14px}
.download-page-main .product-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}
.download-page-main .product-card{
  min-width:0;
  overflow:hidden;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:0 10px 30px rgba(15,23,42,.05);
}
.download-page-main .product-card img{
  width:100%;
  height:190px;
  object-fit:cover;
  background:#e8eef8;
}
.download-page-main .product-card-body{padding:22px}
.download-page-main .product-card h3{
  margin:0 0 8px;
  overflow:hidden;
  font-size:19px;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.download-page-main .product-card p{
  min-height:52px;
  display:-webkit-box;
  overflow:hidden;
  margin:0;
  color:var(--muted);
  -webkit-box-orient:vertical;
  -webkit-line-clamp:2;
}
.download-page-main .product-meta{
  display:flex;
  justify-content:space-between;
  gap:10px;
  margin-top:17px;
  color:#7b8799;
  font-size:13px;
}
.download-page-main .faq-list{
  max-width:900px;
  display:grid;
  gap:14px;
  margin:auto;
}
.download-page-main details{
  overflow:hidden;
  background:#fff;
  border:1px solid var(--line);
  border-radius:14px;
}
.download-page-main summary{
  position:relative;
  padding:20px 56px 20px 22px;
  cursor:pointer;
  font-weight:800;
  list-style:none;
}
.download-page-main summary::-webkit-details-marker{display:none}
.download-page-main summary::after{
  position:absolute;
  top:50%;
  right:22px;
  color:var(--theme);
  content:"+";
  font-size:25px;
  transform:translateY(-50%);
}
.download-page-main details[open] summary::after{content:"−"}
.download-page-main details p{
  margin:0;
  padding:0 22px 22px;
  color:var(--muted);
}
.download-page-main .final-cta{
  padding:0 0 88px;
  background:#fff;
}
.download-page-main .cta-panel{
  position:relative;
  overflow:hidden;
  padding:52px;
  color:#fff;
  background:linear-gradient(125deg,#082d6b,#0B3D91 62%,#185cae);
  border-radius:24px;
  text-align:center;
  box-shadow:0 22px 54px rgba(11,61,145,.22);
}
.download-page-main .cta-panel::after{
  position:absolute;
  width:220px;
  height:220px;
  right:-90px;
  bottom:-135px;
  border:32px solid rgba(255,255,255,.08);
  border-radius:50%;
  content:"";
}
.download-page-main .cta-panel h2{
  position:relative;
  z-index:1;
  margin:0 0 12px;
  font-size:clamp(27px,4vw,40px);
}
.download-page-main .cta-panel p{
  position:relative;
  z-index:1;
  max-width:680px;
  margin:0 auto 25px;
  color:#dbeafe;
}
.download-page-main .cta-panel a{
  position:relative;
  z-index:1;
  min-height:48px;
  display:inline-flex;
  align-items:center;
  padding:0 22px;
  color:var(--theme);
  background:#fff;
  border-radius:11px;
  font-weight:850;
}
@media (max-width:1100px){
  .main-nav{display:none}
  .hamburger{display:flex}
  .header-inner{min-height:70px}
  .member-btn{display:none}
}
@media (max-width:820px){
  .container{width:min(100% - 28px,1180px)}
  .topbar .container{justify-content:center}
  .topbar .container>span:first-child{display:none}
  .topbar .contact{width:100%;justify-content:space-between;gap:10px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:34px}
  .download-page-main .download-hero{padding:68px 0 92px}
  .download-page-main .download-hero p{font-size:16px}
  .download-page-main .security-strip{grid-template-columns:1fr}
  .download-page-main .download-grid,
  .download-page-main .product-grid{grid-template-columns:1fr}
  .download-page-main .download-card p{min-height:0}
  .download-page-main .steps{grid-template-columns:repeat(2,minmax(0,1fr));gap:34px 14px}
  .download-page-main .steps::before{display:none}
  .download-page-main .section{padding:68px 0}
}
@media (max-width:560px){
  .topbar .contact{font-size:12px}
  .topbar .contact a:last-child{display:none}
  .logo span{max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .account-btn{display:none}
  .footer-grid{grid-template-columns:1fr}
  .footer .container{padding-top:45px}
  .download-page-main .download-hero h1{font-size:38px}
  .download-page-main .hero-actions{flex-direction:column}
  .download-page-main .primary-action,
  .download-page-main .secondary-action{width:100%}
  .download-page-main .security-strip{width:calc(100% - 28px)}
  .download-page-main .steps{grid-template-columns:1fr}
  .download-page-main .step{display:grid;grid-template-columns:58px 1fr;text-align:left;column-gap:16px}
  .download-page-main .step-number{grid-row:1/3;margin:0}
  .download-page-main .step h3{align-self:end}
  .download-page-main .cta-panel{padding:38px 22px}
}