/* 南海诸岛与九段线采用本地 GeoJSON 绘制为完整插图，避免压缩主图。 */
#layer-south-china-sea-inset{pointer-events:none}
.south-sea-frame{fill:rgba(248,252,255,.97);stroke:rgba(14,116,144,.62);stroke-width:1.2;rx:10;ry:10;filter:drop-shadow(0 5px 12px rgba(15,23,42,.16))}
.south-sea-title{font-family:"Microsoft YaHei","PingFang SC",sans-serif;font-size:12px;font-weight:800;letter-spacing:.08em;fill:#0c4a6e;text-anchor:middle}
.south-sea-grid{stroke:rgba(100,116,139,.22);stroke-width:.6;stroke-dasharray:3 4;vector-effect:non-scaling-stroke}
.south-sea-land{fill:#fef3c7;stroke:#0f766e;stroke-width:.85;vector-effect:non-scaling-stroke}
.south-sea-nine-dash{fill:#dc2626;stroke:#991b1b;stroke-width:.35;vector-effect:non-scaling-stroke}
.south-sea-label{font-family:"Microsoft YaHei","PingFang SC",sans-serif;font-size:9px;font-weight:700;fill:#075985;paint-order:stroke fill;stroke:#fff;stroke-width:2px;text-anchor:middle}
.south-sea-note{font-family:"Microsoft YaHei","PingFang SC",sans-serif;font-size:8px;font-weight:700;fill:#b91c1c;text-anchor:middle}