:root{
  --theme:#0B3D91;
  --theme-deep:#07285f;
  --amber:#d89b32;
  --sand:#f5efe4;
  --ink:#201a16;
  --muted:#6c665f;
  --line:#e8e0d5;
  --white:#fff;
  --shadow:0 18px 50px rgba(32,26,22,.11);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#fcfaf7;color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.7}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit}
.container{width:min(1180px,calc(100% - 40px));margin:auto}


.topbar{background:var(--ink);color:#eee4d5;font-size:13px}
.topbar .container{height:36px;display:flex;align-items:center;justify-content:space-between}
.topbar a{color:#f3c878}
.contact{white-space:nowrap}


.header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
.header-inner{min-height:76px;display:flex;align-items:center;gap:28px}
.logo{display:flex;align-items:center;gap:10px;min-width:190px;color:var(--theme-deep);font-weight:800;font-size:19px}
.logo img{width:38px;height:38px;object-fit:contain}
.main-nav{flex:1}
.nav-list{display:flex;align-items:center;justify-content:center;gap:2px;list-style:none;margin:0;padding:0}
.nav-item{position:relative}
.nav-link{display:flex;align-items:center;gap:5px;padding:25px 12px;font-size:14px;white-space:nowrap}
.nav-link:hover,.nav-link:focus{color:var(--theme)}
.has-arrow:after{content:"⌄";font-size:12px;color:#9c8b76}
.dropdown-panel,.mega-menu{position:absolute;top:calc(100% + 1px);left:50%;transform:translate(-50%,8px);width:310px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.22s;z-index:30}
.mega-menu{width:700px}
.nav-item:hover .dropdown-panel,.nav-item:focus-within .dropdown-panel,
.nav-item:hover .mega-menu,.nav-item:focus-within .mega-menu{opacity:1;visibility:visible;transform:translate(-50%,0)}
.dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
.panel-title{font-weight:800;color:var(--theme-deep);margin-bottom:12px;border-bottom:2px solid var(--amber);padding-bottom:8px}
.dropdown-panel>a,.mega-list>a:not(.mega-card){display:block;padding:8px 0;border-bottom:1px solid #f0ebe4;font-size:13px}
.dropdown-panel>a:hover,.mega-list>a:hover{color:var(--theme)}
.mega-grid{display:grid;grid-template-columns:1.5fr .8fr;gap:22px}
.mega-list{display:grid;gap:8px}
.mega-card{display:flex;gap:10px;padding:8px;border-radius:8px}
.mega-card:hover{background:#faf6ef}
.mega-card img{width:42px;height:42px;border-radius:7px;object-fit:cover;background:#eee}
.mega-card span{min-width:0}
.mega-card b,.mega-card small{display:block}
.mega-card b{font-size:13px}
.mega-card small{font-size:11px;color:var(--muted);line-height:1.5}
.mega-grid>div>p{font-size:13px;color:var(--muted);margin-top:0}
.mega-footer{display:inline-block;margin-top:10px;color:var(--theme);font-weight:700;font-size:13px}
.header-btns{display:flex;align-items:center;gap:10px;white-space:nowrap}
.member-link{font-size:13px;color:var(--theme)}
.open-link{padding:8px 15px;background:var(--theme);color:#fff;border-radius:5px;font-size:13px}
.hamburger{display:none;border:0;background:transparent;padding:7px;cursor:pointer}
.hamburger span{display:block;width:23px;height:2px;margin:5px 0;background:var(--ink);transition:.2s}


.drawer-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.48);z-index:60}
.drawer-overlay.open{display:block}
.mobile-drawer{position:fixed;right:0;top:0;bottom:0;width:min(380px,88vw);background:#fff;z-index:70;transform:translateX(100%);transition:.28s;overflow:auto}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{height:70px;display:flex;align-items:center;gap:14px;padding:0 20px;border-bottom:1px solid var(--line);font-weight:700}
.drawer-head>a{margin-left:auto;color:var(--theme)}
.drawer-close{border:0;background:transparent;font-size:29px;line-height:1;cursor:pointer;color:var(--muted)}
.drawer-menu{padding:12px 20px 40px}
.drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid var(--line);background:transparent;text-align:left;font-size:15px;color:var(--ink);cursor:pointer}
.drawer-group .drawer-toggle:after{content:"＋";float:right;color:var(--theme)}
.drawer-group .drawer-toggle.active:after{content:"－"}
.drawer-submenu{display:none;padding:7px 12px;background:#faf7f1}
.drawer-submenu.open{display:block}
.drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:13px;border-bottom:1px solid #eee7dc}


.download-page-main{background:linear-gradient(180deg,#fbf4e8 0,#fff 370px)}
.download-hero{text-align:center;padding:78px 20px 55px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--theme);font-size:13px;font-weight:800;letter-spacing:1px}
.eyebrow:before{content:"";width:25px;height:2px;background:var(--amber)}
.download-hero h1{max-width:820px;margin:14px auto 12px;color:var(--ink);font-size:clamp(32px,5vw,58px);line-height:1.15;letter-spacing:-1px}
.download-hero p{max-width:650px;margin:0 auto;color:var(--muted);font-size:16px}
.download-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:28px}
.primary-btn,.secondary-btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 23px;border-radius:5px;font-weight:700;font-size:14px}
.primary-btn{background:var(--theme);color:#fff;box-shadow:0 8px 20px rgba(11,61,145,.2)}
.secondary-btn{border:1px solid #cfc2b2;background:#fff;color:var(--theme)}
.download-badges{display:flex;justify-content:center;gap:18px;flex-wrap:wrap;margin-top:25px;color:#7c7268;font-size:12px}
.download-badges span{display:inline-flex;align-items:center;gap:6px}
.download-badges i{width:7px;height:7px;border-radius:50%;background:var(--amber)}
.download-wrap{padding:20px 0 85px}
.download-section-title{text-align:center;margin:0 auto 35px;max-width:650px}
.download-section-title h2{font-size:30px;margin:0 0 8px}
.download-section-title p{color:var(--muted);margin:0}
.download-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:78px}
.step-card{position:relative;background:#fff;border:1px solid var(--line);padding:29px 25px;border-radius:12px;box-shadow:0 8px 24px rgba(32,26,22,.045)}
.step-no{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;background:#f5e4c7;color:#865b1b;font-weight:800;margin-bottom:18px}
.step-card h3{margin:0 0 8px;font-size:18px}
.step-card p{margin:0;color:var(--muted);font-size:14px}
.step-card:not(:last-child):after{content:"→";position:absolute;right:-18px;top:39px;color:var(--amber);font-size:25px;z-index:2}
.platform-panel{display:grid;grid-template-columns:1fr 1fr;gap:25px;background:var(--ink);color:#fff;border-radius:16px;padding:35px;margin-bottom:78px}
.platform-panel h2{margin:0 0 10px;font-size:27px}
.platform-panel p{color:#d8cec0;margin:0 0 20px}
.platform-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.platform-item{display:flex;align-items:center;gap:12px;padding:15px;border:1px solid rgba(255,255,255,.16);border-radius:9px;background:rgba(255,255,255,.05)}
.platform-icon{width:35px;height:35px;border-radius:8px;background:var(--amber);color:var(--ink);display:grid;place-items:center;font-weight:900}
.platform-item strong{display:block;font-size:14px}
.platform-item small{display:block;color:#c5bbaf;font-size:11px}
.download-faq{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}
.faq-item{background:#fff;border:1px solid var(--line);padding:20px 22px;border-radius:9px}
.faq-item h3{font-size:15px;margin:0 0 6px;color:var(--theme-deep)}
.faq-item p{font-size:13px;color:var(--muted);margin:0}
.notice{margin-top:30px;padding:16px 20px;background:#fff8e9;border-left:3px solid var(--amber);color:#766348;font-size:13px}


.footer{background:#211b17;color:#d9d0c5;padding:52px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:38px}
.footer strong{font-size:20px;color:#fff}
.footer h3{font-size:14px;color:#fff;margin:0 0 14px}
.footer p{font-size:12px;color:#aaa096;margin:12px 0;line-height:1.8}
.footer-grid>div:not(.footer-brand) a{display:block;color:#aaa096;font-size:12px;padding:3px 0}
.footer-grid a:hover{color:#f0c36b}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:35px;padding:18px 0;font-size:12px;color:#92877c}


@media(max-width:1050px){
  .main-nav{display:none}
  .hamburger{display:block}
  .header-btns{margin-left:auto}
  .mega-menu{width:min(700px,calc(100vw - 30px))}
}
@media(max-width:760px){
  .container{width:min(100% - 28px,1180px)}
  .topbar .container{height:auto;min-height:36px;padding:7px 0;align-items:flex-start;gap:4px;flex-direction:column}
  .contact{white-space:normal}
  .logo{min-width:0;font-size:16px}
  .logo img{width:32px;height:32px}
  .open-link,.member-link{display:none}
  .download-hero{padding:52px 10px 38px}
  .download-hero h1{font-size:35px}
  .download-hero p{font-size:14px}
  .download-steps,.platform-panel,.download-faq{grid-template-columns:1fr}
  .step-card:not(:last-child):after{content:"↓";right:50%;top:auto;bottom:-25px}
  .download-steps{gap:28px;margin-bottom:55px}
  .platform-panel{padding:25px 20px}
  .platform-list{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:25px}
}
@media(max-width:450px){
  .footer-grid{grid-template-columns:1fr}
  .download-actions>*{width:100%}
}