:root{
  --theme:#0B3D91;
  --theme-dark:#072b68;
  --theme-light:#eaf1fc;
  --accent:#f2b705;
  --ink:#142033;
  --muted:#657186;
  --line:#dfe5ee;
  --surface:#fff;
  --soft:#f5f7fb;
  --success:#15803d;
  --shadow:0 18px 50px rgba(11,61,145,.12);
  --radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:#fff;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.7}
body,button,input{font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{color:inherit}
.container{width:min(1180px,calc(100% - 40px));margin:0 auto}
.topbar{background:var(--theme-dark);color:#dbe8ff;font-size:13px}
.topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.top-contact{display:flex;align-items:center;gap:22px}
.top-contact a{transition:color .2s ease}
.top-contact a:hover{color:#fff}
.header{position:relative;z-index:50;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 4px 20px rgba(17,32,58,.05)}
.header-inner{min-height:78px;display:flex;align-items:center;gap:25px}
.logo{display:flex;align-items:center;gap:11px;min-width:178px;font-weight:800;color:var(--theme);font-size:19px}
.logo img{width:42px;height:42px;object-fit:contain}
.main-nav{margin-left:auto;align-self:stretch}
.nav-list{height:100%;display:flex;align-items:stretch;list-style:none;margin:0;padding:0}
.nav-list>li{position:relative;display:flex;align-items:center}
.nav-link{height:100%;display:flex;align-items:center;padding:0 15px;font-size:15px;font-weight:700;white-space:nowrap;transition:color .2s ease}
.nav-link:hover,.nav-list>li:focus-within>.nav-link{color:var(--theme)}
.has-arrow:after{content:"";width:6px;height:6px;margin-left:7px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translateY(-2px)}
.dropdown-panel,.mega-menu{position:absolute;top:100%;left:0;visibility:hidden;opacity:0;transform:translateY(8px);pointer-events:none;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);transition:.2s ease}
.dropdown-panel{width:310px;padding:12px;border-radius:0 0 14px 14px}
.mega-menu{width:620px;padding:22px;border-radius:0 0 18px 18px}
.nav-list>li:nth-last-child(-n+3) .mega-menu{left:auto;right:0}
.nav-list>li:hover>.dropdown-panel,.nav-list>li:focus-within>.dropdown-panel,.nav-list>li:hover>.mega-menu,.nav-list>li:focus-within>.mega-menu{visibility:visible;opacity:1;transform:translateY(0);pointer-events:auto}
.dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-8px;height:8px}
.drop-item{display:block;padding:10px 12px;border-radius:9px;font-size:14px;color:#344258;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.drop-item:hover{color:var(--theme);background:var(--theme-light)}
.mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.mega-title{margin:0 0 10px;color:var(--theme);font-size:13px;font-weight:800;letter-spacing:.08em}
.mega-card{display:grid;grid-template-columns:auto 1fr;align-items:center;gap:8px;padding:9px 10px;margin:3px 0;border-radius:10px;color:#263650;font-size:14px}
.mega-card:hover{background:var(--theme-light);color:var(--theme)}
.mega-card img{grid-row:1/3;width:26px;height:26px;object-fit:contain}
.mega-card strong{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mega-card small{grid-column:1/-1;color:var(--muted);line-height:1.45}
.mega-card img+strong+small{grid-column:2}
.mega-menu .meta{color:var(--muted);font-size:14px;margin:0 0 14px}
.mega-footer{display:inline-flex;align-items:center;color:var(--theme);font-size:14px;font-weight:800;margin-top:8px}
.mega-footer:after{content:"→";margin-left:7px}
.header-btns{display:flex;align-items:center;gap:9px}
.member-btn,.account-btn{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 15px;border-radius:10px;font-size:14px;font-weight:700}
.member-btn{color:var(--theme);border:1px solid #bed0ec;background:#fff}
.account-btn{color:#fff;background:var(--theme);box-shadow:0 8px 20px rgba(11,61,145,.2)}
.member-btn:hover{background:var(--theme-light)}
.account-btn:hover{background:var(--theme-dark)}
.hamburger{display:none;width:42px;height:42px;border:0;border-radius:10px;background:var(--theme-light);cursor:pointer;padding:10px}
.hamburger span{display:block;width:21px;height:2px;margin:4px auto;background:var(--theme);transition:.2s ease}
.hamburger.active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.drawer-overlay{position:fixed;inset:0;z-index:90;background:rgba(7,21,44,.55);opacity:0;visibility:hidden;transition:.25s ease}
.drawer-overlay.open{opacity:1;visibility:visible}
.mobile-drawer{position:fixed;z-index:100;top:0;right:0;width:min(390px,90vw);height:100vh;background:#fff;transform:translateX(105%);transition:transform .25s ease;overflow-y:auto;box-shadow:-20px 0 50px rgba(7,21,44,.18)}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{min-height:68px;padding:12px 18px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--line);color:var(--theme);font-weight:700}
.drawer-head>a{padding:7px 12px;border-radius:8px;background:var(--theme-light)}
.drawer-close{margin-left:auto;width:38px;height:38px;border:0;border-radius:9px;background:#edf1f7;font-size:25px;line-height:1;cursor:pointer}
.drawer-menu{padding:14px 18px 30px}
.drawer-link,.drawer-toggle{display:flex;width:100%;align-items:center;justify-content:space-between;padding:13px 4px;border:0;border-bottom:1px solid var(--line);background:#fff;font-size:15px;font-weight:700;text-align:left;cursor:pointer}
.drawer-toggle:after{content:"+";color:var(--theme);font-size:20px}
.drawer-toggle.active:after{content:"−"}
.drawer-submenu{display:none;padding:7px 0 12px 14px;border-bottom:1px solid var(--line)}
.drawer-submenu.open{display:block}
.drawer-submenu a{display:block;padding:8px 4px;color:var(--muted);font-size:14px}
.drawer-submenu a:hover{color:var(--theme)}
.target-page-main{min-height:640px}
.download-page-main .download-hero{position:relative;overflow:hidden;padding:82px 0 72px;background:linear-gradient(145deg,#f8fbff 0%,#edf4ff 55%,#fff9e5 100%);border-bottom:1px solid var(--line)}
.download-page-main .download-hero:before,.download-page-main .download-hero:after{content:"";position:absolute;border-radius:50%;pointer-events:none}
.download-page-main .download-hero:before{width:420px;height:420px;right:-150px;top:-210px;background:rgba(11,61,145,.08)}
.download-page-main .download-hero:after{width:180px;height:180px;left:-80px;bottom:-100px;background:rgba(242,183,5,.18)}
.download-page-main .hero-inner{position:relative;z-index:1;text-align:center;max-width:860px;margin:0 auto}
.download-page-main .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 13px;border-radius:999px;background:#fff;border:1px solid #c9d8ef;color:var(--theme);font-size:13px;font-weight:800;box-shadow:0 8px 25px rgba(11,61,145,.08)}
.download-page-main .eyebrow:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--success);box-shadow:0 0 0 4px rgba(21,128,61,.12)}
.download-page-main h1{max-width:820px;margin:20px auto 16px;font-size:clamp(35px,5vw,60px);line-height:1.15;letter-spacing:-.04em;color:#102342}
.download-page-main .hero-copy{max-width:700px;margin:0 auto;color:#53637a;font-size:17px}
.download-page-main .hero-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:28px}
.download-page-main .primary-action,.download-page-main .secondary-action{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 22px;border-radius:12px;font-weight:800;transition:.2s ease}
.download-page-main .primary-action{background:var(--theme);color:#fff;box-shadow:0 13px 28px rgba(11,61,145,.22)}
.download-page-main .primary-action:hover{background:var(--theme-dark);transform:translateY(-2px)}
.download-page-main .secondary-action{background:#fff;color:var(--theme);border:1px solid #c4d3eb}
.download-page-main .secondary-action:hover{border-color:var(--theme);transform:translateY(-2px)}
.download-page-main .trust-row{display:flex;justify-content:center;flex-wrap:wrap;gap:10px 22px;margin-top:26px;color:#53637a;font-size:13px}
.download-page-main .trust-row span:before{content:"✓";display:inline-grid;place-items:center;width:18px;height:18px;margin-right:7px;border-radius:50%;background:#dff5e5;color:var(--success);font-weight:900}
.download-page-main .section{padding:76px 0}
.download-page-main .section-soft{background:var(--soft)}
.download-page-main .section-head{text-align:center;max-width:720px;margin:0 auto 36px}
.download-page-main .section-kicker{margin:0 0 7px;color:var(--theme);font-size:13px;font-weight:900;letter-spacing:.12em}
.download-page-main .section-head h2{margin:0 0 10px;color:#102342;font-size:clamp(27px,3.4vw,40px);line-height:1.25}
.download-page-main .section-head p{margin:0;color:var(--muted)}
.download-page-main .download-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.download-page-main .download-card{position:relative;display:flex;flex-direction:column;min-height:335px;padding:27px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:0 12px 35px rgba(28,47,78,.07);transition:.25s ease}
.download-page-main .download-card:hover{transform:translateY(-5px);border-color:#b9cae5;box-shadow:var(--shadow)}
.download-page-main .card-icon{display:grid;place-items:center;width:58px;height:58px;border-radius:16px;background:var(--theme-light);color:var(--theme);font-size:25px;font-weight:900}
.download-page-main .download-card:nth-child(2) .card-icon{background:#fff3c7;color:#9a6a00}
.download-page-main .download-card:nth-child(3) .card-icon{background:#e3f7ea;color:#13723a}
.download-page-main .download-card h3{margin:20px 0 8px;font-size:21px;color:#142847}
.download-page-main .download-card p{margin:0;color:var(--muted);font-size:14px}
.download-page-main .feature-list{list-style:none;margin:18px 0 24px;padding:0;color:#40516a;font-size:14px}
.download-page-main .feature-list li{padding:5px 0}
.download-page-main .feature-list li:before{content:"•";margin-right:9px;color:var(--theme);font-weight:900}
.download-page-main .card-action{display:inline-flex;align-items:center;justify-content:center;min-height:44px;margin-top:auto;border-radius:10px;background:var(--theme);color:#fff;font-weight:800}
.download-page-main .card-action:hover{background:var(--theme-dark)}
.download-page-main .card-note{display:block;margin-top:9px;text-align:center;color:#7a8596;font-size:12px}
.download-page-main .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}
.download-page-main .step{position:relative;padding:26px 22px 24px;border-radius:16px;background:#fff;border:1px solid var(--line);counter-increment:step}
.download-page-main .step:before{content:"0" counter(step);display:grid;place-items:center;width:42px;height:42px;margin-bottom:17px;border-radius:12px;background:var(--theme);color:#fff;font-weight:900;box-shadow:0 9px 18px rgba(11,61,145,.2)}
.download-page-main .step:not(:last-child):after{content:"→";position:absolute;right:-15px;top:34px;z-index:2;display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--accent);color:#493700;font-weight:900}
.download-page-main .step h3{margin:0 0 7px;color:#142847;font-size:18px}
.download-page-main .step p{margin:0;color:var(--muted);font-size:14px}
.download-page-main .security-panel{display:grid;grid-template-columns:1fr 1fr;gap:28px;padding:35px;border-radius:22px;background:var(--theme);color:#fff;box-shadow:0 22px 50px rgba(11,61,145,.22)}
.download-page-main .security-panel h2{margin:0 0 11px;font-size:30px;line-height:1.3}
.download-page-main .security-panel p{margin:0;color:#dce8ff}
.download-page-main .security-list{display:grid;gap:10px}
.download-page-main .security-item{padding:13px 15px;border:1px solid rgba(255,255,255,.2);border-radius:12px;background:rgba(255,255,255,.08);font-size:14px}
.download-page-main .security-item:before{content:"✓";margin-right:9px;color:#ffe36d;font-weight:900}
.download-page-main .faq-list{max-width:850px;margin:0 auto;display:grid;gap:12px}
.download-page-main .faq-list details{border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden}
.download-page-main .faq-list summary{position:relative;padding:18px 52px 18px 20px;cursor:pointer;color:#172c4b;font-weight:800;list-style:none}
.download-page-main .faq-list summary::-webkit-details-marker{display:none}
.download-page-main .faq-list summary:after{content:"+";position:absolute;right:20px;top:14px;color:var(--theme);font-size:24px}
.download-page-main .faq-list details[open] summary:after{content:"−"}
.download-page-main .faq-list details[open] summary{background:var(--theme-light)}
.download-page-main .faq-answer{padding:17px 20px 20px;color:var(--muted);font-size:14px}
.download-page-main .faq-answer p{margin:0}
.download-page-main .final-cta{padding:0 0 78px;background:var(--soft)}
.download-page-main .cta-box{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:38px 42px;border-radius:22px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}
.download-page-main .cta-box h2{margin:0 0 7px;color:#102342;font-size:28px}
.download-page-main .cta-box p{margin:0;color:var(--muted)}
.download-page-main .cta-box .primary-action{flex:0 0 auto}
.footer{padding:58px 0 0;background:#0a1d3b;color:#cbd7e9}
.footer-grid{display:grid;grid-template-columns:1.45fr 1fr 1fr 1fr;gap:42px}
.footer h3{margin:0 0 15px;color:#fff;font-size:17px}
.footer p{margin:0 0 13px;color:#aebdd3;font-size:14px}
.footer a{display:block;width:max-content;max-width:100%;margin:8px 0;color:#cbd7e9;font-size:14px;transition:color .2s ease}
.footer a:hover{color:#fff}
.footer-bottom{margin-top:42px;padding:20px 0;border-top:1px solid rgba(255,255,255,.12);color:#94a7c3;font-size:13px;text-align:center}
@media (max-width:1080px){
  .main-nav{display:none}
  .hamburger{display:block}
  .header-inner{min-height:70px}
  .header-btns{margin-left:auto}
  .download-page-main .download-grid{grid-template-columns:repeat(2,1fr)}
  .download-page-main .download-card:last-child{grid-column:1/-1}
  .download-page-main .steps{grid-template-columns:repeat(2,1fr)}
  .download-page-main .step:nth-child(2):after{display:none}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:720px){
  .container{width:min(100% - 28px,1180px)}
  .topbar .container{min-height:42px;justify-content:center}
  .topbar .container>span:first-child{display:none}
  .top-contact{width:100%;justify-content:space-between;gap:10px;font-size:12px}
  .logo{min-width:0;font-size:16px}
  .logo img{width:36px;height:36px}
  .member-btn{display:none}
  .account-btn{min-height:38px;padding:0 12px}
  .download-page-main .download-hero{padding:58px 0 54px}
  .download-page-main h1{font-size:37px}
  .download-page-main .hero-copy{font-size:15px}
  .download-page-main .hero-actions{display:grid}
  .download-page-main .section{padding:58px 0}
  .download-page-main .download-grid,.download-page-main .steps,.download-page-main .security-panel{grid-template-columns:1fr}
  .download-page-main .download-card:last-child{grid-column:auto}
  .download-page-main .step:after{display:none}
  .download-page-main .security-panel{padding:27px 22px}
  .download-page-main .security-panel h2{font-size:25px}
  .download-page-main .cta-box{align-items:stretch;flex-direction:column;padding:29px 23px}
  .download-page-main .cta-box .primary-action{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
}
@media (max-width:460px){
  .top-contact a:last-child{display:none}
  .header-btns{gap:6px}
  .account-btn{font-size:13px}
  .download-page-main h1{font-size:32px}
  .download-page-main .download-card{padding:22px}
}