/* =========================================
           1. 設計系統變數 (Design Tokens)
           ========================================= */
        :root {
            /* 顏色系統 */
            --sys-color-primary: #f5b939;
            --sys-color-primary-hover: #ffde99;
            --sys-color-secondary: #3498db;
            --sys-color-secondary-hover: #2980b9;
            
            --sys-color-text-main: #4a4a52;
            --sys-color-text-light: #cbcbcb;
            --sys-color-text-white: #ffffff;
            --sys-color-bg-body: #f2f2f2;
            --sys-color-bg-sidebar: #4a4a52;
            --sys-color-bg-sidebar-sub: #3e3e45;
            --sys-color-bg-card: #ffffff;
            --sys-color-border: #e0e0e0;

            /* 尺寸系統 */
            --sys-sidebar-width: 240px;
            --sys-radius-sm: 4px;
            --sys-radius-md: 8px;
            --sys-radius-lg: 16px;
            --sys-radius-full: 50px;
            
            /* 陰影系統 */
            --sys-shadow-card: 3px 3px 6px rgba(74, 74, 82, 0.2);
            --sys-shadow-dropdown: 0 4px 20px rgba(0, 0, 0, 0.15);
            --sys-shadow-modal: 0 10px 25px rgba(0,0,0,0.2);
            --sys-shadow-select: 0 4px 12px rgba(0,0,0,0.08);

            /* 動畫 */
            --sys-transition: all 0.2s ease-in-out;
        }

        /* =========================================
           2. 基礎設定 (Reset & Base)
           ========================================= */
        * { box-sizing: border-box; }
     
        a { text-decoration: none; color: inherit; transition: var(--sys-transition); cursor: pointer;}
        button, input { font-family: inherit; }

        /* =========================================
           3. 佈局系統 (Layout)
           ========================================= */
        .sys-app-shell {
            display: flex;
            width: 100%;
            min-height: 100vh;
        }

        /* 側邊欄 */
        .sys-sidebar {
            width: var(--sys-sidebar-width);
            background-color: var(--sys-color-bg-sidebar);
            flex-shrink: 0;
            display: flex;
            flex-direction: column;
            border-radius: 0 var(--sys-radius-lg) var(--sys-radius-lg) 0;
            z-index: 10;
        }

        .sys-sidebar-link {
            position: relative; 
            display: block;
            padding: 1rem 1.5rem 1rem 1rem; 
            font-size: 18px;
            color: var(--sys-color-text-white); 
            cursor: pointer;
            transition: background 0.2s;
        }
        .sys-sidebar-link:hover, .sys-sidebar-link.active {
            background: var(--sys-color-primary);
            color: var(--sys-color-text-main);
        }

        .sys-has-submenu::after {
            content: '';
            position: absolute;
            top: 50%; right: 20px;
            width: 0; height: 0;
            border-style: solid;
            border-width: 5px 0 5px 6px; 
            border-color: transparent transparent transparent currentColor;
            transform: translateY(-50%);
            transition: transform 0.3s ease;
        }
        .sys-has-submenu.active::after { transform: translateY(-50%) rotate(90deg); }

        .sys-submenu {
            max-height: 0;
            overflow: hidden;
            background-color: var(--sys-color-bg-sidebar-sub);
            transition: max-height 0.3s ease-out;
        }
        .sys-submenu-link {
            padding: 10px 10px 10px 2.5rem;
            font-size: 16px;
            color: #e0e0e0;
            display: block;
        }
        .sys-submenu-link:hover { background-color: #55555e; color: var(--sys-color-primary); }

        .sys-main-content {
            flex-grow: 1;
            padding: 30px 40px;
            display: flex;
            flex-direction: column;
            gap: 20px;
            overflow-x: hidden;
        }

        /* =========================================
           4. 元件系統 (Components)
           ========================================= */

        /* Header */
        .sys-page-header { display: flex; flex-direction: column; gap: 15px; margin-bottom: 10px; }
        .sys-header-top { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 15px; }

        .sys-breadcrumb { display: flex; align-items: center; flex-wrap: wrap; font-size: 24px; color: var(--sys-color-text-main); }
        .sys-breadcrumb-divider { padding: 0 1rem; color: var(--sys-color-text-light); }
        .sys-text-bold { font-weight: 700; }

        /* Nav & Links */
        .sys-quick-nav { display: flex; align-items: center; flex-wrap: wrap; gap: 0; font-size: 16px; padding-top: 5px; }
        .sys-quick-nav.sys-nav-right { margin-left: auto; }
        
        .sys-link-blue { color: var(--sys-color-secondary); }
        .sys-link-blue:hover { color: var(--sys-color-secondary-hover); }
        .sys-text-gray { color: #ccc; margin: 0 10px; }

        /* Cards */
        .sys-card {
            background-color: var(--sys-color-bg-card);
            border-radius: var(--sys-radius-lg);
            box-shadow: var(--sys-shadow-card);
            padding: 20px;
            width: 100%;
        }
        .sys-card-layout { 
            padding: 0; 
            min-height: 400px; 
            display: flex; 
            flex-direction: column; 
        }

        /* Buttons */
        .sys-btn {
            height: 42px; padding: 0 20px;
            border-radius: var(--sys-radius-md);
            border: none;
            font-size: 16px; font-weight: 500;
            cursor: pointer;
            display: inline-flex; align-items: center; justify-content: center;
            white-space: nowrap; transition: var(--sys-transition);
        }
        .sys-btn-sm { height: 36px; padding: 0 15px; font-size: 14px; }
        .sys-btn-lg { height: 52px; font-weight: 700; min-width: 200px; }
        
        .sys-btn-primary { background-color: var(--sys-color-primary); color: var(--sys-color-text-main); }
        .sys-btn-primary:hover { background-color: var(--sys-color-primary-hover); }
        
        .sys-btn-secondary { background-color: var(--sys-color-secondary); color: var(--sys-color-text-white); }
        .sys-btn-secondary:hover { background-color: var(--sys-color-secondary-hover); }

        /* Form Grid System */
        .sys-form-grid { display: flex; flex-wrap: wrap; gap: 20px; align-items: flex-end; }
        .sys-form-group { display: flex; flex-direction: column; gap: 8px; min-width: 120px; }
        
        /* Form Width Utilities (Replacing inline styles) */
        .sys-w-xs { width: 150px; }
        .sys-w-sm { width: 180px; }
        .sys-w-md { width: 200px; }
        .sys-ml-auto { margin-left: auto; }

        .sys-form-label { font-size: 16px; font-weight: bold; color: var(--sys-color-text-main); }
        
        /* Text Input */
        .sys-form-control {
            background-color: #fff;
            border: 1px solid var(--sys-color-text-light);
            border-radius: var(--sys-radius-md);
            height: 42px; padding: 0 12px;
            width: 100%;
            font-size: 16px; color: var(--sys-color-text-main);
            outline: none; transition: var(--sys-transition);
        }
        .sys-form-control:focus { border-color: var(--sys-color-primary); }

        /* ----------------------------------------------------
           自定義下拉選單 (Custom Select)
           ---------------------------------------------------- */
        .sys-select-container {
            position: relative;
            width: 100%;
            font-size: 16px;
        }

        /* 觸發按鈕 (外觀模仿 input) */
        .sys-select-trigger {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background-color: #fff;
            border: 1px solid var(--sys-color-text-light);
            border-radius: var(--sys-radius-md);
            height: 42px;
            padding: 0 12px;
            cursor: pointer;
            transition: var(--sys-transition);
            user-select: none;
        }
        
        /* 展開狀態的樣式 */
        .sys-select-container.is-open .sys-select-trigger {
            border-color: var(--sys-color-primary);
            border-bottom-left-radius: 0;
            border-bottom-right-radius: 0;
        }

        /* 箭頭 icon */
        .sys-select-arrow {
            width: 10px; height: 6px;
            background-color: var(--sys-color-text-main);
            clip-path: polygon(0 0, 100% 0, 50% 100%);
            transition: transform 0.3s ease;
        }
        .sys-select-container.is-open .sys-select-arrow {
            transform: rotate(180deg);
        }

        /* 下拉選單列表 */
        .sys-select-options {
            position: absolute;
            top: 100%; left: 0; right: 0;
            background-color: #fff;
            border: 1px solid var(--sys-color-primary);
            border-top: none;
            border-radius: 0 0 var(--sys-radius-md) var(--sys-radius-md);
            box-shadow: var(--sys-shadow-select);
            z-index: 100;
            max-height: 0;
            overflow-y: auto;
            opacity: 0;
            visibility: hidden;
            transition: all 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        /* 展開時顯示列表 */
        .sys-select-container.is-open .sys-select-options {
            max-height: 250px; /* 控制最大高度 */
            opacity: 1;
            visibility: visible;
        }

        /* 選項樣式 */
        .sys-select-option {
            padding: 10px 12px;
            cursor: pointer;
            transition: background 0.1s;
        }
        .sys-select-option:hover {
            background-color: #f0f7fc;
            color: var(--sys-color-secondary);
        }
        .sys-select-option.selected {
            background-color: var(--sys-color-primary);
            font-weight: 500;
        }


        /* Dropdown Menu (Nav Bar 用) */
        .sys-dropdown-wrapper {
            position: relative;
            display: inline-flex; align-items: center;
            height: 100%; cursor: pointer;
        }
        .sys-dropdown-menu {
            display: none;
            position: absolute;
            top: 100%; left: 50%; transform: translateX(-50%);
            margin-top: 12px;
            background-color: #fff;
            min-width: 140px;
            border-radius: 12px;
            box-shadow: var(--sys-shadow-dropdown);
            padding: 5px 0; z-index: 1000; text-align: center;
        }
        .sys-dropdown-menu::before {
            content: '';
            position: absolute; top: -8px; left: 50%; transform: translateX(-50%);
            width: 0; height: 0; 
            border-left: 8px solid transparent; border-right: 8px solid transparent; border-bottom: 8px solid #fff;
        }
        .sys-dropdown-menu::after {
            content: ''; position: absolute;
            top: -20px; left: 0; width: 100%; height: 20px;
            background-color: transparent; z-index: 1;
        }
        .sys-dropdown-wrapper:hover .sys-dropdown-menu {
            display: block; animation: sys-fadeIn 0.2s ease-in-out;
        }
        .sys-dropdown-item {
            display: block; padding: 12px 16px;
            color: var(--sys-color-secondary);
            font-size: 15px; font-weight: 500; text-decoration: none;
            transition: background 0.2s; border-bottom: 1px solid #f2f2f2;
        }
        .sys-dropdown-item:last-child { border-bottom: none; }
        .sys-dropdown-item:hover { background-color: #f7f9fc; color: var(--sys-color-secondary-hover); }

        @keyframes sys-fadeIn {
            from { opacity: 0; transform: translate(-50%, -10px); }
            to { opacity: 1; transform: translate(-50%, 0); }
        }

        /* Table Components */
        .sys-table-budget {
            /* 定義此特定表格的欄位寬度 */
            --table-columns: 80px 140px 80px 2fr 120px 2fr 80px; 
        }
        
        .sys-data-table {
            display: grid; 
            grid-template-columns: var(--table-columns, repeat(5, 1fr)); 
            gap: 15px; align-items: center; 
            padding: 15px 10px; 
            border-bottom: 1px solid #eee;
        }
        .sys-table-head {
            background-color: var(--sys-color-bg-sidebar); 
            color: var(--sys-color-text-white);
            border-radius: var(--sys-radius-lg) var(--sys-radius-lg) 0 0; 
            font-weight: bold; 
            border-bottom: none;
        }
        .sys-table-row:hover { background-color: #f0f9ff; }
        .sys-table-row:nth-child(even) { background-color: #fcfcfc; }
        
        .sys-cell { display: flex; align-items: center; word-break: break-word; line-height: 1.4; }
        .sys-cell-center { justify-content: center; }

        .sys-pagination { display: flex; justify-content: center; gap: 10px; padding: 20px 0; margin-top: auto; }
        .sys-page-item {
            width: 40px; height: 40px; 
            border-radius: var(--sys-radius-md); border: none;
            font-size: 18px; cursor: pointer; 
            display: flex; align-items: center; justify-content: center;
            transition: var(--sys-transition);
        }
        .sys-page-item.active { background-color: #bcd7e9; font-weight: bold; }
        .sys-page-item:not(.active) { background-color: #f0f9ff; }
        .sys-page-item:not(.active):hover { background-color: #e1f0fa; }

        /* Footer & Contact */
        .sys-footer-actions {
            display: flex; gap: 20px; padding-bottom: 20px; flex-wrap: wrap;
        }
        .sys-footer-contact-wrapper {
            display: flex; justify-content: flex-end; padding-bottom: 20px;
        }
        
        /* Modal System */
        .sys-modal {
            position: fixed; top: 0; left: 0; width: 100%; height: 100%;
            background-color: rgba(0, 0, 0, 0.6);
            display: flex; align-items: center; justify-content: center;
            z-index: 1000;
            opacity: 0; visibility: hidden;
            transition: opacity 0.3s, visibility 0.3s;
        }
        .sys-modal.is-open { opacity: 1; visibility: visible; }

        .sys-modal-dialog {
            background-color: #f8f8f8;
            width: 900px; max-width: 95%; max-height: 90vh;
            border-radius: 12px;
            box-shadow: var(--sys-shadow-modal);
            display: flex; flex-direction: column; overflow: hidden;
        }
        .sys-modal-header {
            padding: 20px 30px; display: flex; justify-content: space-between; align-items: center;
            background: #fff; border-bottom: 1px solid #eee;
        }
        .sys-modal-title { font-size: 24px; font-weight: bold; }
        .sys-modal-close-btn { background: none; border: none; font-size: 32px; color: #999; cursor: pointer; line-height: 1; }
        .sys-modal-close-btn:hover { color: #666; }
        
        .sys-modal-body {
            padding: 30px;
            overflow-y: auto;
            display: grid; grid-template-columns: 320px 1fr; gap: 40px;
        }
        @media (max-width: 768px) { .sys-modal-body { grid-template-columns: 1fr; } }
        
        .sys-modal-footer { 
            display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 20px; 
        }

        /* Modal Components */
        .sys-mb-2 { margin-bottom: 2rem; }
        .sys-section-heading {
            font-size: 16px; font-weight: bold; color: #d68b00;
            border-left: 4px solid var(--sys-color-primary);
            padding-left: 10px; margin-bottom: 15px;
        }

        .sys-file-link {
            display: inline-flex; align-items: center; gap: 5px;
            background-color: #eef6fc; color: var(--sys-color-secondary);
            padding: 5px 12px; border-radius: var(--sys-radius-sm);
            font-size: 15px; font-weight: 500; transition: var(--sys-transition); margin-left: 10px;
        }
        .sys-file-link:hover { background-color: var(--sys-color-secondary); color: white; transform: translateY(-1px); }

        .sys-contact-badge {
            display: flex; align-items: center;
            background-color: #fff; padding: 6px 16px;
            border-radius: var(--sys-radius-full);
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
            font-size: 15px; color: #666; border: 1px solid var(--sys-color-border);
        }
        .sys-contact-icon { margin-right: 8px; }
        .sys-contact-highlight { color: var(--sys-color-text-main); font-weight: bold; margin: 0 4px; }
        .sys-contact-divider { color: #ccc; margin: 0 5px; }

        .sys-info-card {
            background-color: #fff; border-radius: var(--sys-radius-md);
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
            padding: 25px; border-top: 6px solid var(--sys-color-primary);
            display: flex; flex-direction: column; gap: 15px; height: fit-content;
        }
        .sys-info-row { display: flex; flex-direction: column; gap: 5px; }
        .sys-info-label { font-size: 14px; font-weight: bold; color: var(--sys-color-text-main); }
        .sys-info-value { font-size: 15px; color: #666; line-height: 1.5; }

        .sys-radio-group { display: flex; flex-direction: column; gap: 10px; }
        .sys-radio-label { display: flex; align-items: center; gap: 8px; cursor: pointer; user-select: none; }
        
        .sys-keeper-select-box {
            background: #fff; padding: 15px; 
            border-radius: var(--sys-radius-md); 
            border: 1px solid var(--sys-color-border); 
            display: flex; flex-direction: column; gap: 10px;
        }