:root{--theme:#0B3D91;--deep:#071a36;--ice:#edf6ff;--line:#dbe7f3;--text:#15243a;--muted:#64748b;--white:#fff}
    *{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--text);background:#f5f9fd;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}.container{width:min(1180px,calc(100% - 40px));margin:auto}
    .topbar{background:var(--deep);color:#c9d8eb;font-size:13px}.topbar .container{height:38px;display:flex;align-items:center;justify-content:space-between}.topbar-info{display:flex;gap:22px}.topbar a:hover{color:#fff}
    .header{height:76px;background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:20}.header-inner{height:100%;display:flex;align-items:center;gap:34px}.logo{display:flex;align-items:center;gap:10px;white-space:nowrap;font-weight:800;font-size:19px;color:var(--deep)}.logo img{width:36px;height:36px;object-fit:contain}.main-nav{flex:1}.nav-list{display:flex;align-items:center;justify-content:center;gap:4px;padding:0;margin:0;list-style:none}.nav-item{position:relative}.nav-link{display:block;padding:25px 14px;font-size:15px;color:#263a55;white-space:nowrap}.nav-link:hover{color:var(--theme)}.has-arrow:after{content:"⌄";margin-left:6px;font-size:12px}.dropdown-panel,.mega-menu{position:absolute;top:calc(100% + 1px);left:50%;transform:translateX(-50%);background:#fff;border:1px solid var(--line);box-shadow:0 18px 45px #09254b1c;border-radius:0 0 12px 12px;opacity:0;visibility:hidden;transition:.2s;z-index:30}.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}.dropdown-panel{width:270px;padding:14px}.dropdown-panel a{display:block;padding:9px 12px;border-radius:7px;font-size:14px}.dropdown-panel a:hover{background:var(--ice);color:var(--theme)}.mega-menu{width:650px;padding:22px}.mega-title{font-weight:800;color:var(--deep);margin-bottom:13px}.mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.mega-card{display:flex;align-items:center;gap:10px;padding:10px;border:1px solid var(--line);border-radius:9px;background:#fbfdff}.mega-card:hover{border-color:#9bbbe3;background:var(--ice)}.mega-card img{width:38px;height:38px;object-fit:contain;border-radius:6px}.mega-card strong,.mega-card small{display:block}.mega-card strong{font-size:13px}.mega-card small{font-size:11px;line-height:1.45;color:var(--muted);margin-top:2px}.mega-links{display:flex;flex-wrap:wrap;gap:8px}.mega-links a{padding:5px 10px;background:var(--ice);color:var(--theme);border-radius:20px;font-size:12px}.mega-footer{display:block;color:var(--theme);font-weight:700;font-size:13px;margin-top:16px}.header-btns{display:flex;align-items:center;gap:10px}.member-link{font-size:13px;color:var(--theme)}.open-account{background:var(--theme);color:#fff;padding:8px 14px;border-radius:6px;font-size:13px}.hamburger{display:none;border:0;background:none;padding:6px;cursor:pointer}.hamburger span{display:block;width:23px;height:2px;background:var(--deep);margin:5px 0;transition:.2s}
    .drawer-overlay{display:none;position:fixed;inset:0;background:#06172d99;z-index:50}.drawer-overlay.open{display:block}.mobile-drawer{position:fixed;right:-360px;top:0;width:min(350px,88vw);height:100vh;background:#fff;z-index:60;transition:right .25s;overflow:auto;box-shadow:-10px 0 30px #071a3630}.mobile-drawer.open{right:0}.drawer-head{height:70px;padding:0 20px;display:flex;align-items:center;gap:14px;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:28px;color:var(--muted);cursor:pointer}.drawer-menu{padding:12px 20px}.drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid #edf2f7;background:none;text-align:left;color:var(--text);font-size:15px}.drawer-toggle{cursor:pointer}.drawer-toggle:after{content:"＋";float:right;color:var(--muted)}.drawer-toggle.active:after{content:"－"}.drawer-submenu{display:none;padding:5px 0 8px 15px}.drawer-submenu.open{display:block}.drawer-submenu a{display:block;padding:7px 0;color:var(--muted);font-size:13px}
    .footer{background:var(--deep);color:#c3d2e5;margin-top:70px;padding:48px 0 20px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px}.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:18px}.footer-brand img{width:34px;height:34px;object-fit:contain}.footer p{font-size:13px;color:#94a9c3;max-width:290px;margin-top:16px}.footer h3{font-size:15px;color:#fff;margin:0 0 13px}.footer-links{display:flex;flex-direction:column;gap:7px;font-size:13px;color:#aabdd5}.footer-links a:hover{color:#fff}.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #ffffff1c;margin-top:38px;padding-top:18px;color:#8197b2;font-size:12px}
    .tool-detail-page{padding:48px 0 20px}.crumbs{font-size:13px;color:var(--muted);margin-bottom:24px}.crumbs a{color:var(--theme)}.tool-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:28px;align-items:start}.tool-main,.tool-side{background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 10px 30px #12345d0a}.tool-main{padding:34px}.tool-heading{display:flex;align-items:flex-start;gap:20px;padding-bottom:25px;border-bottom:1px solid var(--line)}.tool-icon{width:76px;height:76px;object-fit:contain;padding:12px;border-radius:14px;background:var(--ice);border:1px solid #cfe1f5}.tool-heading h1{margin:0;color:var(--deep);font-size:30px;line-height:1.3}.tool-heading p{margin:8px 0 0;color:var(--muted);font-size:14px}.tool-meta{display:flex;flex-wrap:wrap;gap:18px;margin:20px 0;color:var(--muted);font-size:13px}.tool-meta b{color:var(--text);margin-left:4px}.tool-content{min-width:0;max-width:100%;overflow-x:auto;font-size:15px}.tool-content h2,.tool-content h3{color:var(--deep);margin:28px 0 12px}.tool-content img,.tool-content table{max-width:100%}.tool-content table{border-collapse:collapse}.tool-content td,.tool-content th{border:1px solid var(--line);padding:8px 12px}.tool-side{padding:24px;position:sticky;top:20px}.tool-side h2{font-size:18px;color:var(--deep);margin:0 0 17px}.related-tool{display:flex;gap:11px;padding:13px 0;border-bottom:1px solid #edf2f7}.related-tool:last-child{border-bottom:0}.related-tool img{width:42px;height:42px;object-fit:contain;border-radius:8px;background:var(--ice);padding:7px}.related-tool strong{display:block;font-size:14px}.related-tool span{display:block;font-size:12px;color:var(--muted);line-height:1.45;margin-top:2px}.tool-back{display:inline-flex;margin-top:22px;padding:10px 17px;border:1px solid #b8cde6;color:var(--theme);border-radius:7px;font-size:13px}
    @media(max-width:980px){.main-nav{display:none}.hamburger{display:block}.header-inner{justify-content:space-between}.header-btns{margin-left:auto}.tool-layout{grid-template-columns:1fr}.tool-side{position:static}.footer-grid{grid-template-columns:repeat(2,1fr)}}
    @media(max-width:600px){.container{width:min(100% - 28px,1180px)}.topbar .container{height:auto;min-height:38px;padding:8px 0;align-items:flex-start;gap:7px;flex-direction:column}.topbar-info{gap:12px;flex-wrap:wrap}.header{height:66px}.logo{font-size:16px}.logo img{width:30px;height:30px}.member-link{display:none}.open-account{padding:7px 10px}.mega-menu{display:none}.tool-detail-page{padding-top:28px}.tool-main{padding:22px 17px}.tool-heading{gap:13px}.tool-icon{width:58px;height:58px}.tool-heading h1{font-size:23px}.tool-meta{gap:8px 14px}.footer{padding-top:35px}.footer-grid{grid-template-columns:1fr;gap:25px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:5px}}