:root{--theme:#0B3D91;--ink:#142033;--muted:#667085;--line:#e5eaf1;--soft:#f5f8fc;--white:#fff;--radius:16px;--shadow:0 16px 45px rgba(18,35,63,.08)}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f7f9fc;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans TC",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:#101a2b;color:#dce5f2;font-size:13px}
    .topbar-inner{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-contact{display:flex;gap:22px}.topbar a:hover{color:#fff}
    .header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}
    .header-inner{height:76px;display:flex;align-items:center;gap:26px}
    .logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;white-space:nowrap;color:var(--ink)}
    .logo img{width:34px;height:34px;object-fit:contain}.logo span{font-size:18px}
    .main-nav{margin-left:auto}.nav-list{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}.nav-link{display:block;padding:25px 12px;font-size:14px;font-weight:650;white-space:nowrap}
    .nav-link:hover{color:var(--theme)}.has-arrow:after{content:"⌄";font-size:12px;margin-left:6px}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%);width:330px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:0 0 16px 16px;box-shadow:var(--shadow);opacity:0;visibility:hidden;pointer-events:none;transition:.2s;z-index:40}
    .mega-menu-wide{width:min(760px,calc(100vw - 30px))}
    .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}
    .dropdown-title,.mega-head{display:flex;justify-content:space-between;gap:15px;align-items:center;margin-bottom:14px}
    .dropdown-title span,.mega-head strong{font-weight:800}.dropdown-title a,.mega-head span{font-size:12px;color:var(--theme)}
    .dropdown-article{display:grid;grid-template-columns:62px 1fr;gap:10px;padding:9px 0;border-top:1px solid var(--line);font-size:13px}
    .dropdown-article img{width:62px;height:45px;border-radius:7px;object-fit:cover}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{display:block;padding:12px;border:1px solid var(--line);border-radius:11px;background:#fff;transition:.2s}
    .mega-card:hover{border-color:var(--theme);transform:translateY(-2px)}
    .mega-card-top{display:flex;align-items:center;gap:8px}.mega-card-top img{width:30px;height:30px;object-fit:contain}
    .mega-card strong{font-size:13px}.mega-card p{margin:7px 0 0;color:var(--muted);font-size:12px;line-height:1.5}
    .mega-stats{display:flex;flex-wrap:wrap;gap:5px;margin-top:9px;color:var(--muted);font-size:11px}
    .broker-rating{display:block;color:#d07a19;font-size:11px}.mega-video img,.mega-product img{width:100%;height:68px;object-fit:cover;border-radius:7px;margin-bottom:7px}
    .mega-duration{display:block;color:var(--theme);font-size:11px;margin-top:5px}
    .mega-categories{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:14px}.mega-categories a{padding:4px 9px;border-radius:20px;background:var(--soft);color:var(--theme);font-size:12px}
    .mega-footer{display:block;margin-top:15px;padding-top:13px;border-top:1px solid var(--line);font-size:13px;color:var(--theme);font-weight:700}
    .header-btns{display:flex;align-items:center;gap:11px}.account-entry{font-size:13px;color:var(--theme);white-space:nowrap}
    .open-account{padding:9px 14px;border-radius:8px;background:var(--theme);color:#fff;font-size:13px;font-weight:700}
    .hamburger{display:none;border:0;background:none;padding:8px;cursor:pointer}.hamburger span{display:block;width:23px;height:2px;margin:5px 0;background:var(--ink);transition:.2s}
    .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;background:rgba(5,13,27,.45);opacity:0;visibility:hidden;z-index:50;transition:.25s}
    .drawer-overlay.open{opacity:1;visibility:visible}.mobile-drawer{position:fixed;right:0;top:0;bottom:0;width:min(390px,88vw);background:#fff;z-index:51;transform:translateX(105%);transition:.3s;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}body.drawer-locked{overflow:hidden}
    .drawer-head{display:flex;align-items:center;gap:13px;padding:20px;border-bottom:1px solid var(--line);font-weight:700}
    .drawer-head>a{margin-left:auto;color:var(--theme);font-size:14px}.drawer-close{border:0;background:none;font-size:27px;cursor:pointer}
    .drawer-menu{padding:12px 20px}.drawer-link,.drawer-toggle{width:100%;display:block;padding:13px 0;text-align:left;border:0;border-bottom:1px solid var(--line);background:none;font-weight:650;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right}.drawer-toggle.active:after{content:"－"}.drawer-submenu{display:none;padding:4px 0 7px 14px}.drawer-submenu.open{display:block}.drawer-submenu a{display:block;padding:7px 0;color:var(--muted);font-size:14px}
    .footer{background:#101a2b;color:#dce5f2;margin-top:70px}.footer-main{padding:55px 0 42px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:42px}.footer .logo{color:#fff}.footer-brand p{max-width:360px;color:#aebbd0;font-size:14px}.footer h3{margin:0 0 15px;color:#fff;font-size:15px}.footer-links{display:grid;gap:9px;color:#aebbd0;font-size:13px}.footer-links a:hover{color:#fff}.footer-contact{display:grid;gap:5px;color:#c6d2e2;font-size:13px}.footer-social{margin-top:15px;color:#9cb7e5}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:17px 0;color:#9daac0;font-size:12px}.footer-bottom-inner{display:flex;justify-content:space-between;gap:20px}
    .tool-detail-page{padding:65px 0 10px}.tool-breadcrumb{font-size:13px;color:var(--muted);margin-bottom:25px}.tool-breadcrumb a{color:var(--theme)}
    .tool-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:28px;align-items:start}
    .tool-main-card,.related-tools{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .tool-main-card{padding:clamp(24px,5vw,52px)}.tool-heading{display:flex;gap:22px;align-items:flex-start;border-bottom:1px solid var(--line);padding-bottom:25px;margin-bottom:26px}
    .tool-icon{width:76px;height:76px;object-fit:contain;border-radius:15px;background:var(--soft);padding:13px;flex:0 0 auto}
    .tool-heading h1{margin:0 0 8px;font-size:clamp(27px,4vw,42px);line-height:1.2}.tool-intro{margin:0;color:var(--muted);font-size:16px}
    .tool-meta{display:flex;flex-wrap:wrap;gap:10px 20px;margin-top:15px;color:var(--muted);font-size:13px}.tool-meta strong{color:var(--ink)}
    .tool-content{min-width:0;max-width:100%;overflow-x:auto;color:#273449}.tool-content img,.tool-content table{max-width:100%}.tool-content table{border-collapse:collapse}.tool-content th,.tool-content td{border:1px solid var(--line);padding:8px 12px}
    .tool-content h2,.tool-content h3{color:var(--ink);margin-top:28px}.tool-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px;padding-top:24px;border-top:1px solid var(--line)}
    .tool-actions a{display:inline-flex;padding:11px 18px;border-radius:9px;background:var(--theme);color:#fff;font-weight:700;font-size:14px}.tool-actions a.secondary{background:#eaf0fa;color:var(--theme)}
    .related-tools{padding:22px;position:sticky;top:98px}.related-tools h2{margin:0 0 14px;font-size:19px}.related-item{display:grid;grid-template-columns:43px 1fr;gap:11px;padding:13px 0;border-top:1px solid var(--line)}.related-item img{width:43px;height:43px;object-fit:contain;border-radius:9px;background:var(--soft);padding:7px}.related-item strong{display:block;font-size:14px}.related-item span{display:block;color:var(--muted);font-size:12px;line-height:1.45;margin-top:3px}
    @media(max-width:1120px){.main-nav{display:none}.hamburger{display:block}.footer-grid{grid-template-columns:repeat(2,1fr)}}
    @media(max-width:760px){.container{width:min(100% - 28px,600px)}.topbar-inner{padding:8px 0;align-items:flex-start}.topbar-contact{gap:10px;flex-direction:column;text-align:right}.header-inner{height:68px;gap:10px}.account-entry{display:none}.open-account{padding:8px 10px}.tool-detail-page{padding:38px 0 0}.tool-layout{grid-template-columns:1fr}.related-tools{position:static}.tool-heading{gap:14px}.tool-icon{width:58px;height:58px}.tool-heading h1{font-size:29px}.footer-grid{grid-template-columns:1fr;gap:28px}.footer-bottom-inner{display:block}.footer-bottom-inner span{display:block;margin:4px 0}.mega-grid{grid-template-columns:1fr 1fr}}