* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Segoe UI', 'Roboto', 'Noto Sans', system-ui, -apple-system, sans-serif;
    background: #f0f2f5;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}
.toolbar {
    background: linear-gradient(135deg, #1a2740 0%, #2c3e66 100%);
    padding: 10px 20px;
    display: flex;
    gap: 14px;
    align-items: center;
    justify-content: center;
    z-index: 10;
    border-bottom: 2px solid #3a5a8c;
    position: relative;
}
.toolbar-title {
    color: #fff;
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 1px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}
.toolbar-sub {
    color: rgba(255,255,255,0.65);
    font-size: 12px;
    font-weight: 400;
    letter-spacing: 0.5px;
}
.toolbar .status {
    margin-left: auto;
    font-size: 12px;
    color: rgba(255,255,255,0.8);
    font-weight: 500;
    background: rgba(255,255,255,0.1);
    padding: 4px 12px;
    border-radius: 12px;
}
.map-selector-label {
    color: rgba(255,255,255,0.75);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
}
.map-selector {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background: rgba(255,255,255,0.95);
    color: #1a2740;
    border: 2px solid rgba(255,255,255,0.6);
    padding: 6px 32px 6px 12px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    outline: none;
    transition: 0.2s;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235a6c7e' stroke-width='2' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    box-shadow: 0 1px 4px rgba(0,0,0,0.12);
}
.map-selector:hover, .map-selector:focus {
    border-color: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.18);
}
.map-selector option {
    background: #fff;
    color: #1a2740;
    padding: 8px;
}
#container {
    flex: 1;
    background: #fefefe;
    position: relative;
    overflow: hidden;
}
svg {
    background-color: #fafcfd;
    cursor: grab;
    width: 100%;
    height: 100%;
    display: block;
}
svg:active {
    cursor: grabbing;
}

/* 缩放控制按钮 */
.zoom-controls {
    position: absolute;
    bottom: 20px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 5;
}
.zoom-controls button {
    width: 57px;
    height: 57px;
    border: none;
    border-radius: 10px;
    background: rgba(255,255,255,0.92);
    color: #333;
    font-size: 30px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0,0,0,0.18);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, box-shadow 0.15s;
    line-height: 1;
    padding: 0;
}
.zoom-controls button:hover {
    background: #e8f0fe;
    box-shadow: 0 3px 14px rgba(0,0,0,0.22);
}
.zoom-controls button:active {
    background: #d2e3fc;
}

/* 节点悬浮提示样式 */
.station-circle, .station-rect {
    transition: stroke-width 0.1s, filter 0.1s;
    cursor: pointer;
}
.station-circle:hover, .station-rect:hover {
    stroke-width: 3;
    filter: drop-shadow(0 0 4px rgba(0,0,0,0.3));
}
.station-label {
    font-size: 11px;
    font-weight: normal;
    dominant-baseline: middle;
    pointer-events: none;
    text-shadow: 0 0 2px white, 0 0 2px white;
    user-select: none;
}
.station-label-en {
    font-size: 7.5px;
    fill: #7a8a9a;
    letter-spacing: 0.2px;
}
.tooltip-dive {
    position: fixed;
    background: rgba(0,0,0,0.75);
    color: white;
    padding: 5px 10px;
    border-radius: 8px;
    font-size: 12px;
    pointer-events: none;
    z-index: 1000;
    white-space: nowrap;
    font-family: monospace;
    backdrop-filter: blur(4px);
    transition: 0.05s linear;
}
.legend-text, .misc-text {
    pointer-events: none;
    user-select: none;
}
.facility-icon {
    pointer-events: none;
}
@keyframes fadein {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 欢迎弹窗 */
.welcome-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.45);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadein 0.25s ease;
}
.welcome-modal {
    background: #fff;
    border-radius: 16px;
    max-width: 540px;
    width: 92%;
    padding: 36px 32px 28px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.28);
    position: relative;
}
.welcome-close {
    position: absolute;
    top: 12px;
    right: 16px;
    width: 32px;
    height: 32px;
    border: none;
    background: #f0f2f5;
    border-radius: 50%;
    font-size: 17px;
    color: #666;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, color 0.15s;
    line-height: 1;
    padding: 0;
}
.welcome-close:hover {
    background: #e0e3e8;
    color: #333;
}
.welcome-modal p {
    font-size: 16px;
    line-height: 1.9;
    color: #2c3e50;
    margin: 0 0 22px 0;
}
.welcome-confirm {
    display: block;
    width: 100%;
    padding: 11px 0;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, #1a2740, #2c3e66);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.15s;
}
.welcome-confirm:hover {
    opacity: 0.85;
}
.welcome-link {
    color: #2c6fbb;
    text-decoration: none;
    font-weight: 600;
    border-bottom: 1.5px solid rgba(44,111,187,0.3);
    transition: border-color 0.15s, color 0.15s;
}
.welcome-link:hover {
    color: #1a4f8b;
    border-bottom-color: #1a4f8b;
}
.info-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1.5px solid rgba(255,255,255,0.4);
    background: rgba(255,255,255,0.12);
    color: rgba(255,255,255,0.85);
    font-size: 16px;
    font-weight: 700;
    font-style: italic;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, border-color 0.15s;
    padding: 0;
    line-height: 1;
    flex-shrink: 0;
}
.info-btn:hover {
    background: rgba(255,255,255,0.25);
    border-color: rgba(255,255,255,0.6);
}

/* 左下角时钟组件 */
.clock-widget {
    position: absolute;
    bottom: 20px;
    left: 20px;
    z-index: 5;
    background: rgba(18, 25, 45, 0.82);
    backdrop-filter: blur(12px);
    border-radius: 1.2rem;
    padding: 14px 14px 12px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.25), inset 0 1px 0 rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.15);
    text-align: center;
    user-select: none;
}
.clock-widget canvas {
    display: block;
    width: 330px;
    height: 330px;
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(0,0,0,0.25), inset 0 0 0 2px rgba(255,255,240,0.15);
    background: radial-gradient(circle at 30% 30%, #fffcf0, #f7f2e0);
    cursor: pointer;
    margin: 0 auto;
}
.clock-tz-bar {
    background: rgba(0,0,0,0.4);
    border-radius: 2rem;
    padding: 3px 10px;
    margin: 8px 0 6px;
    display: inline-block;
}
.clock-tz-label {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    font-family: 'Consolas', 'Courier New', monospace;
    color: #f9f3d9;
}
.clock-select-label {
    display: block;
    font-size: 0.6rem;
    color: rgba(255,255,255,0.5);
    margin-bottom: 3px;
}
.clock-select {
    width: 100%;
    background: rgba(30,42,58,0.9);
    border: 1px solid rgba(95,127,158,0.6);
    color: #f0f3fa;
    padding: 5px 10px;
    border-radius: 1.5rem;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    outline: none;
    transition: 0.2s;
    font-family: inherit;
}
.clock-select:hover {
    border-color: rgba(138,173,204,0.8);
}
.clock-select:focus {
    border-color: #6d9eff;
    box-shadow: 0 0 0 2px rgba(109,158,255,0.3);
}
.clock-select option {
    background: #1e2a3a;
    color: #f0f3fa;
}

/* ========== 移动端适配 ========== */

@media (max-width: 768px) {
    .toolbar {
        padding: 8px 12px;
        gap: 8px;
        flex-wrap: wrap;
        justify-content: flex-start;
    }
    .toolbar-title {
        position: static;
        transform: none;
        font-size: 14px;
        width: 100%;
        text-align: center;
        order: -1;
        margin-bottom: 2px;
    }
    .toolbar .status {
        font-size: 10px;
        padding: 3px 8px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 120px;
    }
    .map-selector-label {
        font-size: 12px;
    }
    .map-selector {
        font-size: 12px;
        padding: 5px 28px 5px 10px;
    }
    .info-btn {
        width: 28px;
        height: 28px;
        font-size: 14px;
    }

    /* 时钟缩小 */
    .clock-widget {
        bottom: 12px;
        left: 12px;
        padding: 8px 10px 8px;
        border-radius: 1rem;
    }
    .clock-widget canvas {
        width: 130px;
        height: 130px;
    }
    .clock-tz-label {
        font-size: 1rem;
        letter-spacing: 1px;
    }
    .clock-tz-bar {
        padding: 2px 8px;
        margin: 5px 0 4px;
    }
    .clock-select {
        font-size: 0.75rem;
        padding: 3px 6px;
    }

    /* 缩放按钮缩小 */
    .zoom-controls {
        bottom: 12px;
        right: 12px;
        gap: 6px;
    }
    .zoom-controls button {
        width: 44px;
        height: 44px;
        font-size: 24px;
        border-radius: 8px;
    }
}

@media (max-width: 480px) {
    .toolbar {
        padding: 6px 10px;
        gap: 6px;
    }
    .toolbar-title {
        font-size: 13px;
    }
    .toolbar .status {
        max-width: 90px;
        font-size: 9px;
        padding: 2px 6px;
    }
    .map-selector {
        font-size: 11px;
        padding: 4px 24px 4px 8px;
    }

    .clock-widget canvas {
        width: 100px;
        height: 100px;
    }
    .clock-tz-label {
        font-size: 0.85rem;
    }
    .clock-select {
        font-size: 0.7rem;
    }

    .zoom-controls button {
        width: 38px;
        height: 38px;
        font-size: 20px;
    }

    .welcome-modal {
        padding: 24px 20px 20px;
    }
    .welcome-modal p {
        font-size: 14px;
        line-height: 1.7;
        margin-bottom: 16px;
    }
    .welcome-confirm {
        padding: 10px 0;
        font-size: 14px;
    }
}