:root{--paper:#fbf8f2;--ink:#22313f;--route:#1f5fa8;--port:#c8962e;--fail:#b4412f;--muted:#5b6875;--rule:#e3dacb;--card:#fffdf8;--route-soft:#e6eef7;--port-soft:#f6ecd6;--fail-soft:#f5e3de;--unknown:#7a8591;--radius:10px;--font:"PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", "Microsoft YaHei", system-ui, sans-serif;--mono:"SF Mono", Menlo, Consolas, monospace}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--paper);color:var(--ink);font:16px/1.7 var(--font);background-image:linear-gradient(#1f5fa80b 1px,#0000 1px),linear-gradient(90deg,#1f5fa80b 1px,#0000 1px);background-size:32px 32px;margin:0}a{color:var(--route);text-underline-offset:3px}a:hover{color:var(--ink)}.wrap{width:100%;max-width:1080px;margin:0 auto;padding:0 16px}.narrow{max-width:820px}.top{border-bottom:1px solid var(--rule);background:#fbf8f2f0}.top .wrap{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 20px;padding-top:12px;padding-bottom:12px;display:flex}.brand{color:var(--ink);letter-spacing:.02em;align-items:center;gap:10px;font-weight:700;text-decoration:none;display:inline-flex}.brand-mark{align-items:center;gap:0;display:inline-flex}.brand-mark i{background:var(--route);border-radius:50%;width:8px;height:8px;display:block}.brand-mark b{background:var(--route);width:14px;height:2px;display:block}.brand-mark em{background:var(--port);width:10px;height:10px;margin:0 2px;display:block;transform:rotate(45deg)}.top nav{flex-wrap:wrap;gap:4px 18px;font-size:15px;display:flex}.top nav a{color:var(--ink);border-bottom:2px solid #0000;padding:2px 0;text-decoration:none}.top nav a:hover,.top nav a[aria-current=page]{border-bottom-color:var(--port)}.hero{padding:40px 0 20px}.hero h1{letter-spacing:.01em;margin:0 0 12px;font-size:clamp(28px,5vw,42px);line-height:1.25}.hero .lede{max-width:46em;margin:0 0 14px;font-size:17px}.basis{color:var(--muted);border-left:3px solid var(--port);flex-wrap:wrap;align-items:center;gap:4px 10px;padding:2px 0 2px 10px;font-size:14px;display:inline-flex}.basis strong{color:var(--ink)}.fence{border:1.5px solid var(--ink);border-radius:var(--radius);background:var(--card);margin:18px 0 8px;padding:14px 16px}.fence h2{letter-spacing:.05em;margin:0 0 6px;font-size:15px}.fence ul{grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:4px 20px;margin:0;padding:0;font-size:15px;list-style:none;display:grid}.fence li{padding-left:16px;position:relative}.fence li:before{content:"";background:var(--fail);width:7px;height:2px;position:absolute;top:.72em;left:0}.panel{background:var(--card);border:1px solid var(--rule);border-radius:var(--radius);margin:20px 0;padding:18px 16px}.panel>h2{margin:0 0 4px;font-size:20px}.panel .hint{color:var(--muted);margin:0 0 14px;font-size:14px}.presets{flex-wrap:wrap;gap:8px;margin:0 0 16px;display:flex}.presets button,.btn-ghost{font:inherit;color:var(--route);border:1px dashed var(--route);cursor:pointer;background:0 0;border-radius:999px;padding:4px 12px;font-size:14px}.presets button:hover,.btn-ghost:hover{background:var(--route-soft)}.fields{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 20px;display:grid}.field{flex-direction:column;gap:4px;min-width:0;display:flex}.field.full{grid-column:1/-1}.field label,.field .lab{font-size:14px;font-weight:600}.field .lab small,.field label small{color:var(--muted);font-weight:400}select,input[type=number],input[type=datetime-local]{font:inherit;color:var(--ink);background:#fff;border:1px solid #cfc4b1;border-radius:8px;width:100%;min-width:0;max-width:100%;padding:8px 10px;font-size:16px}select:focus,input:focus,button:focus-visible{outline:2px solid var(--route);outline-offset:1px}.row{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.row>select{flex:140px;width:auto}.btn{font:inherit;background:var(--route);color:#fff;cursor:pointer;border:0;border-radius:8px;padding:9px 18px;font-weight:600}.btn:hover{background:var(--ink)}.btn-sm{padding:8px 14px;font-size:15px}.chips{flex-wrap:wrap;gap:6px;min-height:8px;margin-top:6px;display:flex}.chip{background:var(--port-soft);border:1px solid var(--port);border-radius:999px;align-items:center;gap:6px;padding:1px 4px 1px 10px;font-size:14px;display:inline-flex}.chip button{font:inherit;color:var(--ink);cursor:pointer;background:0 0;border:0;padding:0 6px;font-size:16px;line-height:1}details.calc{margin-top:6px;font-size:14px}details.calc summary{cursor:pointer;color:var(--route)}.calc-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 12px;margin-top:8px;display:grid}.calc-grid label{color:var(--muted);flex-direction:column;gap:2px;min-width:0;font-size:13px;font-weight:400;display:flex}.calc-out{color:var(--muted);margin:6px 0 0;font-size:13px}.actions{flex-wrap:wrap;align-items:center;gap:10px;margin-top:18px;display:flex}.result{margin:8px 0 32px}.verdict{border-radius:var(--radius);border:1.5px solid var(--route);background:var(--route-soft);margin:0 0 16px;padding:14px 16px}.verdict h2{margin:0 0 4px;font-size:20px}.verdict p{margin:0}.verdict[data-code=blocked]{border-color:var(--fail);background:var(--fail-soft)}.verdict[data-code=incomplete]{border-color:var(--unknown);background:#eef0f1;border-style:dashed}.route{background:var(--card);border:1px solid var(--rule);border-radius:var(--radius);grid-template-columns:minmax(0,1fr) minmax(0,1.25fr) minmax(0,1fr);gap:0;margin:0 0 20px;padding:24px 12px 16px;list-style:none;display:grid;position:relative}.route:before{content:"";border-top:3px solid var(--route);z-index:0;height:0;position:absolute;top:44px;left:16.6%;right:16.6%}.route[data-third=fail]:before{border-top-color:var(--fail);border-top-style:dashed}.stop{z-index:1;text-align:center;min-width:0;padding:0 8px;position:relative}.stop .dot{background:var(--paper);border:3px solid var(--route);width:42px;height:42px;color:var(--route);border-radius:50%;place-items:center;margin:0 auto 8px;font-size:15px;font-weight:700;display:grid}.stop.port .dot{border-color:var(--port);background:var(--port-soft);width:36px;height:36px;color:var(--ink);border-radius:6px;margin-top:3px;margin-bottom:11px;transform:rotate(45deg)}.stop.port .dot span{transform:rotate(-45deg)}.stop[data-status=fail] .dot{border-color:var(--fail);color:var(--fail);background:var(--fail-soft)}.stop[data-status=unknown] .dot{border-style:dashed;border-color:var(--unknown);color:var(--unknown)}.stop .kind{color:var(--muted);font-size:13px;display:block}.stop .name{overflow-wrap:anywhere;margin:2px 0 6px;font-weight:700;line-height:1.4;display:block}.stop .sub{color:var(--muted);overflow-wrap:anywhere;font-size:13px;display:block}.mark{border-radius:4px;padding:0 7px;font-size:13px;font-weight:600;line-height:1.7;display:inline-block}.mark.pass{color:var(--route);background:var(--route-soft)}.mark.fail{color:#fff;background:var(--fail)}.mark.unknown{color:var(--unknown);border:1px dashed var(--unknown);background:0 0;line-height:1.55}.leg{flex-direction:column;align-items:center;gap:4px;margin-top:8px;display:flex}.leg .mark{max-width:100%}.checks{border-top:1px solid var(--rule);margin:0 0 20px;padding:0;list-style:none}.checks li{border-bottom:1px solid var(--rule);grid-template-columns:92px minmax(0,1fr);gap:4px 14px;padding:12px 0;display:grid}.checks .st{padding-top:2px}.checks h3{margin:0;font-size:16px}.checks p{margin:2px 0 0}.checks .cite{color:var(--muted);border-left:2px solid var(--port);overflow-wrap:anywhere;margin-top:6px;padding-left:8px;font-size:13px}.pending{background:var(--card);border:1px dashed var(--unknown);border-radius:var(--radius);padding:14px 16px}.pending h3{margin:0 0 6px;font-size:17px}.pending ol{margin:0;padding-left:1.4em}.pending li{margin:6px 0}.pending .cite{color:var(--muted);overflow-wrap:anywhere;font-size:13px;display:block}.prose{padding-top:32px;padding-bottom:48px}.prose h1{margin:0 0 12px;font-size:clamp(26px,4.4vw,36px);line-height:1.3}.prose h2{border-top:1px solid var(--rule);margin:32px 0 10px;padding-top:8px;font-size:21px}.prose h3{margin:20px 0 6px;font-size:17px}.prose p,.prose li{overflow-wrap:anywhere}.prose blockquote{border-left:3px solid var(--route);background:var(--route-soft);border-radius:0 8px 8px 0;margin:8px 0;padding:8px 14px}.src{background:var(--card);border:1px solid var(--rule);border-radius:var(--radius);margin:12px 0;padding:12px 16px}.src h3{margin:0 0 4px;font-size:16px}.src .meta{color:var(--muted);overflow-wrap:anywhere;margin:0 0 6px;font-size:13px}.banner{border:1.5px solid var(--port);background:var(--port-soft);border-radius:var(--radius);margin:12px 0 8px;padding:12px 16px}.nations{grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:12px;display:grid}.nations section{background:var(--card);border:1px solid var(--rule);border-radius:var(--radius);padding:10px 14px}.nations h3{margin:0 0 4px;font-size:15px}.nations p{margin:0;font-size:15px}.ports{grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:12px;display:grid}.prov{background:var(--card);border:1px solid var(--rule);border-radius:var(--radius);padding:10px 14px}.prov h3{flex-wrap:wrap;align-items:baseline;gap:4px 8px;margin:0;font-size:16px;display:flex}.prov h3 small{color:var(--muted);font-size:13px;font-weight:400}.prov ol{margin:6px 0 0;padding:0;font-size:14px;list-style:none}.prov li{gap:8px;display:flex}.prov li .no{font-family:var(--mono);color:var(--port);min-width:2.2em}.gaps li{margin:6px 0}footer{border-top:1px solid var(--rule);color:var(--muted);margin-top:32px;padding:18px 0 28px;font-size:14px}footer .wrap{flex-wrap:wrap;justify-content:space-between;gap:8px 20px;display:flex}@media (width<=720px){.fields,.calc-grid{grid-template-columns:minmax(0,1fr)}.route{grid-template-columns:minmax(0,1fr);gap:18px;padding:16px 14px}.route:before{border-top:0;border-left:3px solid var(--route);height:auto;inset:36px auto 36px 34px}.route[data-third=fail]:before{border-left-color:var(--fail);border-left-style:dashed}.stop{text-align:left;grid-template-columns:42px minmax(0,1fr);gap:0 14px;padding:0;display:grid}.stop .dot{grid-row:1/span 5;margin:0}.stop>:not(.dot){grid-column:2}.stop>.mark{justify-self:start}.stop.port .dot{margin:3px}.leg{align-items:flex-start}.checks li{grid-template-columns:minmax(0,1fr)}.hero{padding-top:28px}}