:root{--theme:#0B3D91;--cyan:#19D3E6;--ink:#12213D;--muted:#60708C;--line:#DCE5F0;--pale:#F3F7FB;--white:#fff;--shadow:0 18px 48px rgba(17,47,91,.12)}
    *{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--pale);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.7}a{color:inherit;text-decoration:none}button{font:inherit}.container{width:min(1180px,calc(100% - 40px));margin:auto}
    .topbar{background:#0D2448;color:#DCEBFF;font-size:13px}.topbar-inner{min-height:36px;display:flex;align-items:center;justify-content:space-between}.topbar-links{display:flex;gap:22px}.topbar a:hover{color:var(--cyan)}
    .header{position:relative;z-index:20;background:var(--white);border-bottom:1px solid var(--line)}.header-inner{height:78px;display:flex;align-items:center;gap:28px}.logo{display:flex;align-items:center;gap:9px;white-space:nowrap;font-weight:800;font-size:18px}.logo img{width:30px;height:30px;object-fit:contain}.logo-mark{display:inline-grid;place-items:center;width:30px;height:30px;background:var(--theme);color:#fff;border-radius:7px;font-size:11px;letter-spacing:0}.main-nav{margin-left:auto}.nav-list{display:flex;align-items:stretch;gap:4px;margin:0;padding:0;list-style:none}.nav-item{position:relative}.nav-link{display:flex;align-items:center;height:78px;padding:0 13px;font-size:14px;font-weight:700;white-space:nowrap}.nav-link:not(.simple)::after{content:"";width:6px;height:6px;margin:0 0 3px 8px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg)}.nav-link:hover,.nav-link:focus{color:var(--theme)}.dropdown-panel,.mega-menu{position:absolute;top:calc(100% - 1px);left:50%;width:330px;padding:22px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translate(-50%,8px);transition:.2s;z-index:30}.mega-menu{width:680px}.nav-item:focus-within .dropdown-panel,.nav-item:hover .dropdown-panel,.nav-item:focus-within .mega-menu,.nav-item:hover .mega-menu{opacity:1;visibility:visible;transform:translate(-50%,0)}.dropdown-panel:before,.mega-menu:before{content:"";position:absolute;top:-10px;left:0;right:0;height:12px}.mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}.menu-heading{margin:0 0 12px;color:var(--theme);font-size:14px}.menu-list{padding:0;margin:0;list-style:none}.menu-list li+li{border-top:1px solid #edf2f8}.menu-list a{display:block;padding:8px 0;font-size:13px}.menu-list a:hover{color:var(--theme)}.broker-mega-card,.video-mega-card{display:flex;gap:10px;align-items:center;padding:9px 0;border-top:1px solid #edf2f8}.broker-mega-card img,.video-mega-card img{width:40px;height:32px;object-fit:contain}.video-mega-card img{object-fit:cover}.mega-title,.mega-meta{display:block}.mega-title{font-size:13px}.mega-meta{color:var(--muted);font-size:11px}.menu-list img{width:19px;height:19px;vertical-align:middle;object-fit:contain}.header-btns{display:flex;align-items:center;gap:12px}.header-btns>span{font-size:13px;color:var(--muted)}.account-link{padding:8px 15px;border:1px solid var(--theme);color:var(--theme);font-size:13px;font-weight:700}.hamburger{display:none;width:42px;height:40px;border:1px solid var(--line);background:#fff;padding:9px;cursor:pointer}.hamburger span{display:block;height:2px;margin:4px 0;background:var(--theme);transition:.2s}.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;background:rgba(9,25,52,.5);opacity:0;visibility:hidden;transition:.2s;z-index:40}.drawer-overlay.open{opacity:1;visibility:visible}.mobile-drawer{position:fixed;top:0;right:0;width:min(390px,88vw);height:100vh;padding:22px;background:#fff;transform:translateX(100%);transition:.25s;overflow:auto;z-index:41}.mobile-drawer.open{transform:translateX(0)}.drawer-head{display:flex;align-items:center;gap:13px;padding-bottom:20px;border-bottom:1px solid var(--line);color:var(--theme);font-weight:800}.drawer-head a{margin-left:auto;padding:5px 12px;background:var(--theme);color:#fff;font-size:13px}.drawer-close{border:0;background:none;font-size:27px;color:var(--muted);cursor:pointer}.drawer-menu{padding-top:12px}.drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid #edf2f8;background:none;text-align:left;color:var(--ink);font-weight:700;cursor:pointer}.drawer-toggle:after{content:"+";float:right;color:var(--theme);font-size:20px}.drawer-toggle.active:after{content:"-"}.drawer-submenu{display:none;padding:5px 0 8px 14px}.drawer-submenu.open{display:block}.drawer-submenu a{display:block;padding:7px 0;color:var(--muted);font-size:13px}
    .toolscontent-main{padding:46px 0 80px}.breadcrumb{display:flex;gap:8px;color:var(--muted);font-size:13px;margin-bottom:22px}.breadcrumb a:hover{color:var(--theme)}.detail-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;align-items:start}.tool-article,.related-tools{background:#fff;border:1px solid var(--line);box-shadow:0 10px 30px rgba(17,47,91,.05)}.tool-article{padding:clamp(24px,4vw,52px)}.tool-kicker{display:flex;align-items:center;gap:10px;color:var(--theme);font-weight:800;font-size:13px}.tool-kicker:before{content:"工具详情";padding:4px 9px;background:#E3FBFD;color:#087D8A;font-size:12px}.tool-article h1{margin:15px 0 10px;font-size:clamp(28px,4vw,46px);line-height:1.2;color:#0D2448}.tool-lead{max-width:760px;margin:0;color:var(--muted);font-size:17px}.tool-meta{display:flex;flex-wrap:wrap;gap:18px;margin:22px 0 0;padding-top:18px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}.tool-body{min-width:0;max-width:100%;overflow-x:auto;margin-top:34px;font-size:15px}.tool-body h2{margin:34px 0 12px;padding-left:13px;border-left:4px solid var(--cyan);font-size:24px}.tool-body h3{margin-top:26px;font-size:18px}.tool-body p{margin:12px 0}.tool-body ul{padding-left:22px}.tool-body img,.tool-body table{max-width:100%}.tool-body table{width:100%;border-collapse:collapse}.tool-body th,.tool-body td{padding:11px;border:1px solid var(--line);text-align:left}.tool-body th{background:#EFF7FC}.tool-callout{margin:26px 0;padding:18px 20px;background:#EAF9FB;border-left:4px solid var(--cyan);color:#174D61}.tool-action{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}.primary-btn,.outline-btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 20px;font-weight:700;font-size:14px;cursor:pointer}.primary-btn{background:var(--theme);color:#fff}.outline-btn{border:1px solid var(--theme);color:var(--theme);background:#fff}.related-tools{padding:22px;position:sticky;top:20px}.related-tools h2{margin:0 0 10px;font-size:18px}.related-card{display:block;padding:14px 0;border-top:1px solid var(--line)}.related-card strong,.related-card small{display:block}.related-card strong{font-size:14px}.related-card small{margin-top:3px;color:var(--muted);font-size:12px}.related-card:hover strong{color:var(--theme)}
    .footer{background:#0D2448;color:#DCEBFF}.footer-main{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:38px;padding:44px 0}.footer-brand>span{font-size:20px;color:#fff;font-weight:800}.footer p{margin:10px 0;color:#AFC2DF;font-size:13px}.footer h3{margin:0 0 12px;color:#fff;font-size:14px}.footer-links{padding:0;margin:0;list-style:none}.footer-links li{margin:7px 0;font-size:13px}.footer a:hover{color:var(--cyan)}.footer-contact{display:grid;gap:8px;color:#AFC2DF;font-size:13px}.footer-bottom{border-top:1px solid rgba(220,235,255,.16)}.footer-bottom-inner{display:flex;justify-content:space-between;gap:20px;padding:15px 0;color:#AFC2DF;font-size:12px}
    @media(max-width:960px){.main-nav{display:none}.hamburger{display:block}.header-btns{margin-left:auto}.header-inner{height:68px}.footer-main{grid-template-columns:1fr 1fr}.detail-layout{grid-template-columns:1fr}.related-tools{position:static}.nav-link{height:68px}}
    @media(max-width:600px){.container{width:min(100% - 28px,1180px)}.topbar-inner{min-height:42px;align-items:flex-start;flex-direction:column;justify-content:center;gap:1px}.topbar-links{gap:12px;font-size:11px}.header-btns>span{display:none}.account-link{padding:7px 10px}.toolscontent-main{padding:26px 0 54px}.tool-article{padding:23px 18px}.tool-article h1{font-size:30px}.tool-lead{font-size:15px}.detail-layout{gap:18px}.footer-main{grid-template-columns:1fr 1fr;gap:25px 18px;padding:32px 0}.footer-brand{grid-column:1/-1}.footer-bottom-inner{align-items:flex-start;flex-direction:column;gap:4px}.breadcrumb{overflow:hidden;white-space:nowrap}.tool-body h2{font-size:21px}}