:root {
        --bg1: #0b1120;
        --bg2: #172033;
        --panel: #121a2b;
        --line: #2d3c5e;
        --text: #e8eefc;
        --muted: #9aaccd;
        --tab: rgba(255,255,255,.05);
        --tab-active-1: #1e5cff;
        --tab-active-2: #44a2ff;
    }

    body {
        background: radial-gradient(circle at 20% 20%, rgba(255,255,255,.05) 0 1px, transparent 2px) 0 0 / 90px 90px, linear-gradient(180deg, var(--bg1), var(--bg2));
        color: var(--text);
    }

    .season-wrap {
        max-width: 98%;
        margin: 0 auto;
        padding: 20px;
    }

    .season-title {
        font-size: 30px;
        font-weight: 800;
        margin-bottom: 8px;
    }

    .panel-box {
        background: rgba(18,26,43,.92);
        border: 1px solid var(--line);
        border-radius: 18px;
        overflow: hidden;
        box-shadow: 0 10px 30px rgba(0,0,0,.25);
    }

    .panel-body {
        padding: 16px;
    }

    .chapter-tabs {
        display: flex;
        gap: 10px;
        flex-wrap: wrap;
        margin-bottom: 16px;
    }

    .chapter-tab {
        border: 1px solid var(--line);
        background: var(--tab);
        color: var(--text);
        border-radius: 12px;
        padding: 9px 14px;
        font-size: 14px;
        font-weight: 700;
        cursor: pointer;
        transition: .2s ease;
        user-select: none;
    }

        .chapter-tab:hover {
            transform: translateY(-1px);
            border-color: rgba(255,255,255,.25);
        }

        .chapter-tab.active {
            background: linear-gradient(135deg, var(--tab-active-1), var(--tab-active-2));
            border-color: transparent;
            box-shadow: 0 8px 20px rgba(36,112,255,.28);
        }

    .chapter-panel {
        display: none;
    }

        .chapter-panel.active {
            display: block;
        }

    .chapter-title {
        font-size: 20px;
        font-weight: 800;
        margin-bottom: 6px;
    }

    .chapter-sub {
        font-size: 12px;
        color: var(--muted);
        margin-bottom: 10px;
    }

    .graph-wrap {
        position: relative;
        overflow: auto;
        background: rgba(255,255,255,.02);
        border: 1px solid var(--line);
        border-radius: 18px;
        padding: 12px;
        cursor: grab;
        touch-action: pan-x pan-y;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
    }

        .graph-wrap.dragging {
            cursor: grabbing;
            user-select: none;
        }

    .graph-canvas {
        position: relative;
        background: linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px) 0 0 / 100% 150px, linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px) 0 0 / 230px 100%;
        border-radius: 12px;
    }

    .lane-label {
        position: absolute;
        width: 160px;
        height: 88px;
        border-radius: 12px;
        border: 2px solid rgba(145,232,255,.35);
        background: linear-gradient(135deg, rgba(93,125,126,.8), rgba(38,58,57,.95));
        box-shadow: 0 8px 16px rgba(0,0,0,.22);
        display: flex;
        align-items: flex-end;
        padding: 10px 12px;
        font-size: 16px;
        font-weight: 800;
        white-space: pre-line;
        line-height: 1.2;
        pointer-events: none;
    }

    .task-node {
        position: absolute;
        width: 190px;
        min-height: 88px;
        padding: 10px 12px 10px;
        border-radius: 12px;
        background: linear-gradient(135deg, rgba(58,104,69,.68), rgba(28,55,38,.95));
        border: 1px solid rgba(104,181,124,.35);
        box-shadow: 0 8px 16px rgba(0,0,0,.22);
        cursor: pointer;
        transition: transform .12s ease, box-shadow .12s ease, border-color .12s ease;
    }

    .task-node.backward-node {
        background: linear-gradient(135deg, rgba(145,58,89,.68), rgba(75,28,45,.95));
        border: 1px solid rgba(255,124,182,.45);
    }

        .task-node:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 22px rgba(0,0,0,.28);
            border-color: rgba(255,255,255,.2);
        }

        .task-node.cross {
            background: linear-gradient(135deg, rgba(105,96,46,.68), rgba(70,58,23,.95));
            border-color: rgba(209,183,79,.3);
        }

    .task-id {
        font-size: 11px;
        color: var(--muted);
        margin-bottom: 4px;
    }

    .task-name {
        font-size: 15px;
        font-weight: 800;
        margin-bottom: 6px;
        padding-right: 8px;
        line-height: 1.2;
    }

    .task-meta {
        display: flex;
        gap: 6px;
        flex-wrap: wrap;
        margin-bottom: 6px;
    }

    .task-tag {
        font-size: 11px;
        padding: 3px 7px;
        border-radius: 999px;
        background: rgba(255,255,255,.12);
        color: #e4eefb;
    }

    .task-desc {
        font-size: 11px;
        line-height: 1.4;
        color: #dce8df;
        white-space: pre-line;
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .task-pre {
        margin-top: 6px;
        font-size: 11px;
        line-height: 1.35;
        color: #ffd9a1;
        white-space: pre-line;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .muted {
        color: var(--muted);
    }

    .empty-note {
        color: var(--muted);
        font-size: 14px;
    }

    .edge-glow {
        opacity: 0.28;
        filter: blur(2px);
    }

    .edge-flow {
        stroke-dasharray: 8 10;
        animation: flowAnimation 0.8s linear infinite;
        opacity: 0.9;
    }

    .task-edge-group {
        transition: opacity .2s ease;
    }

        .task-edge-group:hover .edge-flow {
            animation: flowAnimation 0.45s linear infinite;
            filter: brightness(1.2);
        }

    @@keyframes flowAnimation {
        from

    {
        stroke-dashoffset: 18;
    }

    to {
        stroke-dashoffset: 0;
    }

    }

    .task-modal-mask {
        position: fixed;
        inset: 0;
        background: rgba(3, 8, 20, .72);
        display: none;
        align-items: center;
        justify-content: center;
        z-index: 9999;
        padding: 20px;
    }

        .task-modal-mask.show {
            display: flex;
        }

    .task-modal {
        width: min(980px, 96vw);
        max-height: 90vh;
        overflow: auto;
        background: rgba(16, 24, 40, .98);
        border: 1px solid rgba(255,255,255,.12);
        border-radius: 18px;
        box-shadow: 0 20px 50px rgba(0,0,0,.45);
    }

    .task-modal-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 16px 18px;
        border-bottom: 1px solid var(--line);
        position: sticky;
        top: 0;
        background: rgba(16, 24, 40, .98);
        z-index: 1;
    }

    .task-modal-title {
        font-size: 22px;
        font-weight: 800;
        margin: 0;
    }

    .task-modal-close {
        border: 0;
        background: rgba(255,255,255,.08);
        color: white;
        width: 36px;
        height: 36px;
        border-radius: 10px;
        font-size: 18px;
        cursor: pointer;
    }

    .task-modal-body {
        padding: 18px;
    }

    .modal-grid {
        display: grid;
        grid-template-columns: 240px 1fr;
        gap: 14px;
        margin-bottom: 14px;
    }

    .modal-box {
        border: 1px solid var(--line);
        border-radius: 14px;
        background: rgba(255,255,255,.03);
        padding: 14px;
    }

    .modal-box-title {
        font-size: 13px;
        color: var(--muted);
        margin-bottom: 8px;
    }

    .modal-box-value {
        font-size: 16px;
        font-weight: 700;
        line-height: 1.5;
        white-space: pre-line;
        word-break: break-word;
    }

    .task-desc-title {
        font-size: 18px;
        font-weight: 800;
        color: var(--text);
        margin-bottom: 8px;
    }

    .task-desc-value {
        font-size: 14px;
        line-height: 1.5;
        white-space: pre-line;
        word-break: break-word;
        color: var(--muted);
    }

    .target-row {
        display: grid;
        grid-template-columns: 1fr 140px;
        gap: 10px;
        border: 1px solid var(--line);
        border-radius: 14px;
        background: rgba(255,255,255,.03);
        margin-bottom: 10px;
        overflow: hidden;
    }

    .target-desc {
        padding: 14px;
        font-size: 15px;
        line-height: 1.55;
        white-space: pre-line;
    }

    .target-progress {
        border-left: 1px solid var(--line);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 22px;
        font-weight: 800;
        color: #dff2ff;
        background: rgba(255,255,255,.03);
        text-align: center;
        padding: 14px;
    }

    @@media (max-width: 900px) {
        .season-wrap {
            padding: 14px;
        }

        .season-title {
            font-size: 26px;
        }

        .lane-label {
            width: 140px;
            height: 80px;
            font-size: 14px;
        }

        .task-node {
            width: 180px;
        }

        .modal-body-grid {
            grid-template-columns: 1fr !important;
        }

        .target-row {
            grid-template-columns: 1fr;
        }

        .target-progress {
            border-left: 0;
            border-top: 1px solid var(--line);
        }
    }

    .target-desc-secondary {
        display: block;
        font-size: 0.85em;
        opacity: 0.5;
        margin-top: 6px;
        padding-top: 4px;
        border-top: 1px dashed rgba(255,255,255,0.1);
    }

    /* 獎勵組件樣式 */
    .reward-container {
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
        margin-top: 8px;
    }

    .reward-box {
        position: relative;
        width: 80px;
        height: 80px;
        background: rgba(0,0,0,.4);
        border: 1px solid rgba(255,255,255,.1);
        border-radius: 8px;
        overflow: hidden;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: transform .1s, border-color .1s;
    }
    .reward-box:hover {
        transform: scale(1.05);
        border-color: rgba(255,255,255,.3);
        z-index: 2;
    }

    .reward-box img {
        max-width: 90%;
        max-height: 90%;
        object-fit: contain;
    }

    .reward-box .exp-text {
        font-size: 18px;
        font-weight: 900;
        color: #ffda6a;
    }

    .reward-label-name {
        position: absolute;
        top: 2px;
        left: 4px;
        font-size: 10px;
        color: rgba(255,255,255,.7);
        pointer-events: none;
        max-width: 90%;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .reward-label-count {
        position: absolute;
        bottom: 2px;
        right: 4px;
        font-size: 12px;
        font-weight: 800;
        color: #fff;
        text-shadow: 0 0 4px rgba(0,0,0,.8);
        pointer-events: none;
    }

    /* 懸浮說明 */
    #rewardTooltip {
        position: fixed;
        background: rgba(10, 20, 35, .95);
        border: 1px solid #4a6785;
        padding: 8px 12px;
        border-radius: 6px;
        color: #eee;
        font-size: 13px;
        pointer-events: none;
        display: none;
        z-index: 10000;
        max-width: 250px;
        box-shadow: 0 10px 25px rgba(0,0,0,.5);
    }

    /* 節點小圖示 */
    .node-reward-icons {
        margin-top: 8px;
        display: flex;
        gap: 4px;
        flex-wrap: wrap;
        border-top: 1px solid rgba(255,255,255,.05);
        padding-top: 6px;
    }
    .node-reward-icon {
        width: 24px;
        height: 24px;
        background: rgba(0,0,0,.3);
        border-radius: 4px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 7px;
        overflow: hidden;
    }
    .node-reward-icon img {
        width: 80%;
        height: 80%;
        object-fit: contain;
    }
    .node-reward-icon .exp-tag {
        color: #ffda6a;
        font-weight: 900;
        transform: scale(0.8);
    }

    .modal-body-grid {
        display: grid;
        grid-template-columns: 320px 1fr;
        gap: 20px;
    }
    .modal-side-left {
        display: flex;
        flex-direction: column;
        gap: 14px;
    }