:root{
      --theme:#0B3D91;
      --ink:#14233d;
      --muted:#66758c;
      --line:#dce5f0;
      --soft:#f4f8fc;
      --white:#fff;
      --shadow:0 18px 50px rgba(24,53,96,.12);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;background:#fff;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:#10284d;color:#dce9fb;font-size:13px}
    .topbar .container{height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-links{display:flex;gap:22px;flex-wrap:wrap}
    .topbar a:hover{color:#fff}
    .header{position:relative;background:#fff;border-bottom:1px solid #e9eef5;z-index:20}
    .header-inner{height:78px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;font-size:20px;font-weight:800;color:var(--theme)}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:center;justify-content:center;gap:4px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:block;padding:26px 14px;font-size:15px;font-weight:600;color:#30435e;white-space:nowrap}
    .nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--theme)}
    .nav-link.has-arrow:after{content:"⌄";font-size:13px;margin-left:6px}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% - 1px);left:50%;transform:translateX(-50%);opacity:0;visibility:hidden;pointer-events:none;background:#fff;border:1px solid #e3ebf4;box-shadow:var(--shadow);border-radius:0 0 16px 16px;transition:.2s ease}
    .dropdown-panel{width:300px;padding:18px}
    .mega-menu{width:min(850px,calc(100vw - 30px));padding:24px}
    .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;pointer-events:auto}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;top:-12px;left:0;right:0;height:12px}
    .panel-title{font-size:13px;color:var(--theme);font-weight:800;margin:0 0 12px}
    .panel-list{display:grid;gap:8px}
    .panel-list a{padding:8px 10px;border-radius:8px;font-size:14px}
    .panel-list a:hover{background:var(--soft);color:var(--theme)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .mega-card{display:flex;gap:10px;padding:10px;border:1px solid #edf1f6;border-radius:12px}
    .mega-card:hover{border-color:#b9cbea;background:#f8fbff}
    .mega-card img{width:42px;height:42px;object-fit:cover;border-radius:9px;background:#eef4fb}
    .mega-card strong{display:block;font-size:13px;line-height:1.35}
    .mega-card small{display:block;color:var(--muted);font-size:11px;line-height:1.4;margin-top:3px}
    .mega-footer{display:block;text-align:right;color:var(--theme);font-size:13px;font-weight:700;margin-top:16px}
    .header-btns{display:flex;align-items:center;gap:10px;white-space:nowrap}
    .member-link{padding:9px 15px;color:var(--theme);font-size:14px;font-weight:700}
    .open-link,.hero-button{background:var(--theme);color:#fff;border-radius:10px;padding:10px 17px;font-weight:700;font-size:14px}
    .open-link:hover,.hero-button:hover{background:#082e70}
    .hamburger{display:none;border:0;background:none;padding:8px;cursor:pointer}
    .hamburger span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0;border-radius:2px}
    .drawer-overlay{display:none}
    .mobile-drawer{position:fixed;top:0;right:-360px;width:min(360px,90vw);height:100vh;background:#fff;z-index:100;box-shadow:-10px 0 30px rgba(0,0,0,.16);transition:right .25s;overflow:auto}
    .mobile-drawer.open{right:0}
    .drawer-overlay.open{display:block;position:fixed;inset:0;background:rgba(12,28,54,.48);z-index:90}
    .drawer-head{display:flex;align-items:center;gap:12px;padding:20px;border-bottom:1px solid var(--line);color:var(--theme);font-weight:800}
    .drawer-head a{margin-left:auto;background:var(--theme);color:#fff;padding:5px 11px;border-radius:7px;font-size:13px}
    .drawer-close{border:0;background:none;font-size:28px;color:#78879c;cursor:pointer}
    .drawer-menu{padding:12px 20px 35px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid #edf1f5;background:none;text-align:left;color:var(--ink);font-weight:700;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:var(--theme)}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:6px 0 8px 15px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:7px 0;color:var(--muted);font-size:14px}
    .hero{background:linear-gradient(135deg,#f8fbff 0%,#eef5ff 55%,#fff8ed 100%);padding:64px 0 76px;overflow:hidden}
    .hero-layout-37{text-align:center}
    .hero-kicker{display:inline-flex;align-items:center;gap:8px;padding:6px 13px;border-radius:30px;background:#fff;border:1px solid #dbe6f3;color:var(--theme);font-size:13px;font-weight:800}
    .hero h1{max-width:780px;margin:18px auto 10px;font-size:clamp(34px,5vw,64px);line-height:1.15;letter-spacing:-2px;color:#122746}
    .hero-intro{max-width:680px;margin:0 auto;color:var(--muted);font-size:17px}
    .puzzle-stage{position:relative;margin:45px auto 0;width:min(980px,100%);min-height:360px;padding:22px;border-radius:28px;background:rgba(255,255,255,.7);box-shadow:var(--shadow);border:1px solid rgba(210,224,241,.9)}
    .puzzle-board{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;max-width:760px;margin:auto}
    .puzzle-piece{position:relative;min-height:125px;border-radius:18px;display:flex;align-items:center;justify-content:center;padding:18px;color:#fff;font-weight:800;font-size:17px;box-shadow:inset 0 -5px 0 rgba(0,0,0,.08),0 8px 14px rgba(20,50,90,.1);transform:rotate(var(--r,0deg))}
    .puzzle-piece:after{content:"";position:absolute;width:22px;height:22px;border-radius:50%;background:inherit;right:-10px;top:calc(50% - 11px)}
    .puzzle-piece:before{content:"";position:absolute;width:22px;height:22px;border-radius:50%;background:inherit;bottom:-10px;left:calc(50% - 11px)}
    .piece-blue{background:#2f75c8}.piece-yellow{background:#f2b544;color:#553d0a}.piece-coral{background:#e97865}.piece-green{background:#64aa7a}.piece-purple{background:#8176c9}.piece-sky{background:#55b9c8}.piece-navy{background:#315285}.piece-mint{background:#91c6b0;color:#173f48}
    .puzzle-gap{min-height:125px;border:3px dashed #ff9e3d;background:#fff5e8;border-radius:18px;display:flex;align-items:center;justify-content:center;padding:14px;position:relative}
    .gap-mark{width:54px;height:54px;border:2px dashed #f19a34;border-radius:14px;color:#e58a20;font-size:29px;display:grid;place-items:center}
    .gap-callout{position:absolute;right:5%;bottom:25px;background:#fff;border:1px solid #ffd9a8;border-radius:16px;padding:15px 18px;text-align:left;box-shadow:0 12px 30px rgba(190,113,25,.14);max-width:230px}
    .gap-callout strong{display:block;color:#c66f12;font-size:15px}
    .gap-callout span{display:block;color:var(--muted);font-size:12px;margin:4px 0 10px}
    .gap-callout .hero-button{display:inline-block;background:#ef8f2f;padding:7px 12px;font-size:12px}
    .puzzle-label{display:flex;justify-content:center;gap:24px;flex-wrap:wrap;margin-top:22px;color:#61728b;font-size:13px}
    .puzzle-label b{color:var(--ink)}
    .section{padding:72px 0}
    .section.soft{background:var(--soft)}
    .section-head{text-align:center;max-width:700px;margin:0 auto 34px}
    .section-head h2{font-size:32px;margin:0 0 8px;color:#132b4d}
    .section-head p{margin:0;color:var(--muted)}
    .feature-grid,.tool-grid,.product-grid,.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .feature-card,.tool-card,.product-card,.video-card,.faq-item{border:1px solid var(--line);border-radius:16px;background:#fff;padding:22px;box-shadow:0 8px 24px rgba(37,67,109,.05)}
    .feature-card .icon{width:44px;height:44px;display:grid;place-items:center;border-radius:12px;background:#e9f1ff;color:var(--theme);font-size:23px;margin-bottom:14px}
    .feature-card h3,.tool-card h3,.product-card h3,.video-card h3{margin:0 0 7px;font-size:18px}
    .feature-card p,.tool-card p,.product-card p,.video-card p{color:var(--muted);font-size:14px;margin:0}
    .broker-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .broker-card{border:1px solid var(--line);background:#fff;border-radius:15px;padding:19px;display:flex;align-items:center;gap:14px}
    .broker-card img{width:50px;height:50px;border-radius:12px;background:#f1f5fa;object-fit:contain}
    .broker-card strong{display:block}
    .broker-card small{color:var(--muted);font-size:12px}
    .article-list{display:grid;gap:14px}
    .article-row{display:grid;grid-template-columns:180px 1fr auto;align-items:center;gap:18px;padding:15px;background:#fff;border:1px solid var(--line);border-radius:14px}
    .article-row img{width:180px;height:105px;object-fit:cover;border-radius:10px;background:#edf3fa}
    .article-row h3{margin:0 0 5px;font-size:17px}
    .article-row p{margin:0;color:var(--muted);font-size:13px}
    .article-meta{color:#8290a2;font-size:12px;white-space:nowrap}
    .text-link{color:var(--theme);font-weight:700;font-size:13px}
    .faq-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .faq-item summary{font-weight:800;cursor:pointer;color:#243a5b}
    .faq-item p{color:var(--muted);font-size:14px;margin:12px 0 0}
    .footer{background:#10284d;color:#c6d6eb;padding:52px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1.2fr;gap:35px}
    .footer h3{color:#fff;font-size:16px;margin:0 0 15px}
    .footer-brand{font-size:20px;color:#fff;font-weight:800;margin-bottom:10px}
    .footer p,.footer a{font-size:13px;color:#b9cbe2}
    .footer a:hover{color:#fff}
    .footer-links{display:grid;gap:7px}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.14);margin-top:35px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:12px;color:#9eb3ce}
    @media(max-width:980px){
      .main-nav{display:none}.hamburger{display:block}.header-btns{margin-left:auto}
      .feature-grid,.tool-grid,.product-grid,.video-grid{grid-template-columns:repeat(2,1fr)}
      .puzzle-board{grid-template-columns:repeat(4,1fr)}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{height:auto;min-height:36px;padding:7px 0;align-items:flex-start;flex-direction:column;gap:2px}
      .topbar-links{gap:10px}
      .header-inner{height:68px}.logo{min-width:0;font-size:16px}.logo img{width:31px;height:31px}
      .member-link,.open-link{display:none}
      .hero{padding:42px 0 48px}.hero h1{font-size:38px;letter-spacing:-1px}.hero-intro{font-size:15px}
      .puzzle-stage{padding:12px;margin-top:30px;min-height:0}.puzzle-board{gap:5px}.puzzle-piece,.puzzle-gap{min-height:74px;border-radius:10px;padding:7px;font-size:11px}.puzzle-piece:after,.puzzle-piece:before{display:none}
      .gap-callout{position:static;max-width:none;margin:15px auto 0;text-align:center;padding:12px}
      .puzzle-label{gap:10px;font-size:11px}
      .section{padding:48px 0}.section-head h2{font-size:26px}
      .feature-grid,.tool-grid,.product-grid,.video-grid,.broker-strip,.faq-list{grid-template-columns:1fr}
      .article-row{grid-template-columns:90px 1fr;gap:12px}.article-row img{width:90px;height:75px}.article-meta{grid-column:2}.article-row .text-link{display:none}
      .footer-grid{grid-template-columns:1fr;gap:25px}
    }