* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        }

        body {
            background-color: #f4f7fc;
            min-height: 100vh;
            display: flex;
			 flex-direction: column;
        }

        .container {
            max-width: 1200px;
            width: 100%;
			       margin-left: auto;
            margin-right: auto;
        }

        .estimator-header {
            margin-bottom: 28px;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
        }

        .estimator-header h1 {
            font-size: 2.4rem;
            font-weight: 700;
            color: #1A3A8F;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .estimator-header .sub {
            font-size: 1.1rem;
            color: #2C3E50;
            opacity: 0.8;
            margin-top: 8px;
            border-left: 5px solid #3A5FCD;
            padding-left: 18px;
        }

        .card {
            background: #ffffff;
            border-radius: 28px;
            padding: 28px 30px;
            box-shadow: 0 12px 30px rgba(0, 20, 50, 0.1);
            margin-bottom: 28px;
            border: 1px solid rgba(58, 95, 205, 0.15);
            transition: box-shadow 0.2s;
        }

        .card:hover {
            box-shadow: 0 18px 36px rgba(26, 58, 143, 0.08);
        }

        .card-title {
            font-size: 1.5rem;
            font-weight: 600;
            color: #1A3A8F;
            margin-bottom: 26px;
            display: flex;
            align-items: center;
            gap: 10px;
            border-bottom: 2px dashed #dde3ed;
            padding-bottom: 18px;
        }

        .card-title span {
            background: #E8F1FF;
            padding: 6px 20px;
            border-radius: 40px;
            font-size: 0.9rem;
            color: #1A3A8F;
            margin-left: auto;
            font-weight: 600;
        }

        .form-group {
            margin-bottom: 28px;
        }

        label {
            display: block;
            font-weight: 600;
            font-size: 1rem;
            color: #1e2b45;
            margin-bottom: 10px;
        }

        .label-extra {
            font-size: 0.85rem;
            color: #6c757d;
            font-weight: 400;
            margin-top: 4px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        select, input[type="range"] {
            width: 100%;
        }

        select {
            padding: 18px 22px;
            background-color: #f8fafd;
            border: 1.5px solid #d4deec;
            border-radius: 24px;
            font-size: 1.05rem;
            appearance: none;
            background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="%233A5FCD" stroke-width="2"><polyline points="6 9 12 15 18 9"/></svg>');
            background-repeat: no-repeat;
            background-position: right 22px center;
            background-size: 20px;
            color: #121926;
        }

        select:focus {
            outline: none;
            border-color: #1A3A8F;
            background-color: #ffffff;
        }

        .billing-tabs {
            display: flex;
            background: #eaedf2;
            border-radius: 50px;
            padding: 6px;
            margin: 16px 0 28px;
            gap: 6px;
        }

        .billing-tab {
            flex: 1;
            text-align: center;
            padding: 16px 4px;
            font-weight: 600;
            font-size: 1.05rem;
            border-radius: 40px;
            color: #2C3E50;
            background: transparent;
            transition: 0.2s;
            cursor: pointer;
            border: none;
        }

        .billing-tab.active {
            background: #ffffff;
            color: #1A3A8F;
            box-shadow: 0 6px 16px rgba(0,30,70,0.12);
            font-weight: 700;
        }

        .billing-content {
            display: none;
        }

        .billing-content.active {
            display: block;
        }

        .range-slider-container {
            background: #f2f6fb;
            padding: 22px 22px;
            border-radius: 28px;
            margin: 16px 0 12px;
        }

        .range-header {
            display: flex;
            justify-content: space-between;
            font-weight: 600;
            color: #1A3A8F;
            margin-bottom: 16px;
            font-size: 1.1rem;
        }

        .range-value {
            background: white;
            padding: 6px 20px;
            border-radius: 40px;
            font-size: 1.1rem;
            box-shadow: 0 2px 8px rgba(0,0,0,0.04);
        }

        .range-slider {
            -webkit-appearance: none;
            height: 10px;
            background: #cbd5e1;
            border-radius: 20px;
        }

        .range-slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            width: 28px;
            height: 28px;
            background: #1A3A8F;
            border-radius: 50%;
            box-shadow: 0 3px 10px rgba(26,58,143,0.4);
            border: 3px solid white;
            cursor: pointer;
            margin-top: -9px;
        }

        .range-slider::-moz-range-thumb {
            width: 28px;
            height: 28px;
            background: #1A3A8F;
            border-radius: 50%;
            border: 3px solid white;
            cursor: pointer;
        }

        .option-group {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 12px;
            margin: 18px 0 12px;
        }

        .option-item {
            position: relative;
        }

        .option-item input {
            position: absolute;
            opacity: 0;
        }

        .option-label {
            display: block;
            background: #f0f4fa;
            border-radius: 36px;
            padding: 16px 6px;
            text-align: center;
            font-weight: 500;
            border: 2px solid transparent;
            transition: 0.15s;
            color: #1e2b45;
            font-size: 1rem;
            cursor: pointer;
        }

        .option-item input:checked + .option-label {
            background: #1A3A8F;
            color: white;
            font-weight: 600;
            border-color: #1A3A8F;
        }

        .toggle-container {
            background: #f2f6fb;
            border-radius: 50px;
            padding: 20px 28px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin: 28px 0 16px;
        }

        .toggle-label {
            font-weight: 600;
            color: #0b1b3a;
            font-size: 1.1rem;
        }

        .toggle-switch {
            position: relative;
            display: inline-block;
            width: 70px;
            height: 34px;
        }

        .toggle-switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }

        .toggle-slider {
            position: absolute;
            cursor: pointer;
            top: 0; left: 0; right: 0; bottom: 0;
            background-color: #b0c0d0;
            border-radius: 34px;
            transition: 0.2s;
        }

        .toggle-slider:before {
            position: absolute;
            content: "";
            height: 26px;
            width: 26px;
            left: 4px;
            bottom: 4px;
            background-color: white;
            border-radius: 50%;
            transition: 0.2s;
        }

        input:checked + .toggle-slider {
            background-color: #1A3A8F;
        }

        input:checked + .toggle-slider:before {
            transform: translateX(36px);
        }

        .action-buttons {
            display: flex;
            gap: 16px;
            margin: 32px 0 16px;
        }

        .btn {
            flex: 1;
            padding: 18px 16px;
            border: none;
            border-radius: 40px;
            font-weight: 700;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            background: white;
            color: #1e2b45;
            border: 2px solid #dde3ed;
            cursor: pointer;
            transition: 0.2s;
        }

        .btn-primary {
            background: #1A3A8F;
            color: white;
            border: none;
            box-shadow: 0 12px 22px -10px #1A3A8F;
        }

        .btn-primary:hover {
            background: #132b63;
            transform: translateY(-2px);
        }

        .btn:hover {
            background: #48BF8F;
            border-color: #a0b5d0;
        }

        .btn i { font-style: normal; font-size: 1.3rem; }

        .results-card {
            display: none;
        }

        .cost-summary {
            background: linear-gradient(145deg, #1A3A8F, #132b63);
            border-radius: 32px;
            padding: 32px 28px;
            color: white;
            margin: 16px 0 28px;
        }

        .total-cost {
            font-size: 4rem;
            font-weight: 800;
            line-height: 1;
            margin-bottom: 12px;
        }

        .cost-range {
            font-size: 1.2rem;
            opacity: 0.9;
            border-bottom: 1px solid rgba(255,255,255,0.2);
            padding-bottom: 24px;
            margin-bottom: 24px;
        }

        .cost-breakdown {
            background: rgba(255,255,255,0.1);
            border-radius: 24px;
            padding: 12px 20px;
        }

        .cost-item {
            display: flex;
            justify-content: space-between;
            padding: 16px 0;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            font-size: 1.1rem;
        }

        .cost-item:last-child {
            border-bottom: none;
        }

        .cost-item.total {
            font-weight: 700;
            font-size: 1.5rem;
            border-top: 2px solid white;
            margin-top: 12px;
            padding-top: 22px;
        }

        .cost-label {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .cost-label i { font-size: 1.4rem; width: 28px; }

        .cost-amount { font-weight: 600; }

        .chart-container {
            background: white;
            border-radius: 28px;
            padding: 24px;
            box-shadow: 0 8px 22px rgba(0,0,0,0.02);
            margin: 28px 0;
        }

        .chart-title {
            font-weight: 700;
            color: #1A3A8F;
            margin-bottom: 24px;
            font-size: 1.2rem;
        }

        .chart-bar {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
        }

        .bar-label {
            width: 130px;
            font-size: 1rem;
            color: #2C3E50;
            font-weight: 500;
        }

        .bar-container {
            flex: 1;
            height: 40px;
            background: #e6ecf5;
            border-radius: 30px;
            overflow: hidden;
        }

        .bar-fill {
            height: 100%;
            background: linear-gradient(90deg, #1A3A8F, #5271c7);
            display: flex;
            align-items: center;
            justify-content: flex-end;
            padding-right: 18px;
            color: white;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: 30px;
            transition: width 0.3s ease;
        }

        .other-expenses-note {
            background: #E8F1FF;
            border-radius: 20px;
            padding: 20px 24px;
            margin: 24px 0 16px;
            color: #1A3A8F;
            font-size: 0.95rem;
            border-left: 8px solid #3A5FCD;
        }

        .other-expenses-note strong {
            display: block;
            margin-bottom: 10px;
            font-size: 1.1rem;
        }

        .other-expenses-note ul {
            margin-top: 10px;
            padding-left: 24px;
            color: #1e2b45;
            line-height: 1.6;
        }

        /* Modal for compare (enhanced for PC) */
        .modal-overlay {
            position: fixed;
            top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(0, 0, 0, 0.7);
            display: none;
            justify-content: center;
            align-items: center;
            z-index: 1000;
            padding: 24px;
            backdrop-filter: blur(4px);
        }

        .modal-overlay.active {
            display: flex;
            animation: fadeIn 0.3s ease;
        }

        .modal-content {
            background: white;
            border-radius: 40px;
            padding: 30px 36px;
            max-width: 1100px;
            width: 100%;
            max-height: 85vh;
            overflow-y: auto;
            box-shadow: 0 30px 60px rgba(0,0,0,0.4);
        }

        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 24px;
            padding-bottom: 16px;
            border-bottom: 3px solid #e0e7f0;
        }

        .modal-title {
            font-size: 1.9rem;
            font-weight: 700;
            color: #1A3A8F;
        }

        .close-modal {
            background: none;
            border: none;
            font-size: 2.8rem;
            cursor: pointer;
            color: #6c757d;
            line-height: 1;
            transition: 0.1s;
        }
        .close-modal:hover { color: #1A3A8F; }

        .comparison-section {
            margin-bottom: 36px;
        }

        .section-title {
            font-size: 1.4rem;
            font-weight: 700;
            color: #1e2b45;
            margin-bottom: 22px;
        }

        .comparison-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 24px;
        }

        .comparison-card {
            background: #f8fafd;
            border-radius: 28px;
            padding: 24px 20px;
            border: 2px solid transparent;
            transition: 0.2s;
        }

        .comparison-card.recommended {
            border-color: #1A3A8F;
            background: #E8F1FF;
        }

        .card-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 16px;
        }

        .card-header .card-title {
            font-weight: 700;
            color: #0b1b3a;
            margin: 0; border: none; padding: 0;
            font-size: 1.3rem;
        }

        .recommended-badge {
            background: #1A3A8F;
            color: white;
            padding: 5px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 700;
        }

        .card-stats {
            display: flex;
            justify-content: space-between;
            margin: 18px 0;
        }

        .stat-item {
            text-align: center;
        }

        .stat-value {
            font-weight: 800;
            color: #1A3A8F;
            font-size: 1.2rem;
        }

        .stat-label {
            font-size: 0.8rem;
            color: #6c757d;
        }

        .features-list {
            list-style: none;
            margin: 16px 0;
        }

        .features-list li {
            padding: 8px 0;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.95rem;
        }

        .features-list li::before {
            content: "✓";
            color: #28a745;
            font-weight: bold;
            font-size: 1.2rem;
        }

        .savings-summary {
            background: #E8F1FF;
            border-radius: 28px;
            padding: 24px 30px;
            margin: 28px 0 20px;
        }

        .savings-title {
            font-weight: 700;
            color: #1A3A8F;
            margin-bottom: 12px;
            font-size: 1.3rem;
        }

        .disclaimer-mini {
            font-size: 0.85rem;
            color: #6c757d;
            text-align: center;
            margin-top: 40px;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        /* ========= 移动端文字大小优化 ========= */
        @media (max-width: 768px) {
            body {
                padding: 12px 12px 30px;
            }

            .estimator-header h1 {
                font-size: 2rem;
            }

            .estimator-header .sub {
                font-size: 0.95rem;
                border-left-width: 4px;
                padding-left: 12px;
            }

            .card {
                padding: 18px 16px;
                border-radius: 24px;
            }

            .card-title {
                font-size: 1.25rem;
                margin-bottom: 18px;
                padding-bottom: 12px;
            }

            .card-title span {
                font-size: 0.8rem;
                padding: 4px 14px;
            }

            label {
                font-size: 0.9rem;
                margin-bottom: 6px;
            }

            .label-extra {
                font-size: 0.75rem;
            }

            select {
                padding: 14px 16px;
                font-size: 0.95rem;
                border-radius: 20px;
                background-position: right 14px center;
            }

            .billing-tab {
                padding: 12px 2px;
                font-size: 0.9rem;
            }

            .range-slider-container {
                padding: 16px 14px;
            }

            .range-header {
                font-size: 0.95rem;
                margin-bottom: 12px;
            }

            .range-value {
                font-size: 0.9rem;
                padding: 4px 12px;
            }

            .option-group {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }

            .option-label {
                padding: 12px 4px;
                font-size: 0.85rem;
                border-radius: 30px;
            }

            .toggle-container {
                padding: 16px 18px;
            }

            .toggle-label {
                font-size: 0.95rem;
            }

            .btn {
                padding: 14px 8px;
                font-size: 0.95rem;
            }

            .btn i {
                font-size: 1.1rem;
            }

            .total-cost {
                font-size: 2.8rem;
            }

            .cost-range {
                font-size: 1rem;
                padding-bottom: 16px;
            }

            .cost-item {
                font-size: 0.95rem;
                padding: 12px 0;
            }

            .cost-item.total {
                font-size: 1.2rem;
            }

            .cost-label i {
                font-size: 1.2rem;
                width: 24px;
            }

            .chart-title {
                font-size: 1rem;

                margin-bottom: 16px;
            }

            .bar-label {
                width: 85px;
                font-size: 0.85rem;
            }

            .bar-container {
                height: 32px;
            }

            .bar-fill {
                font-size: 0.75rem;
                padding-right: 8px;
            }

            .other-expenses-note {
                padding: 14px 16px;
                font-size: 0.85rem;
            }

            .other-expenses-note strong {
                font-size: 0.95rem;
            }

            .other-expenses-note ul {
                padding-left: 18px;
            }

            /* 模态框移动端适配 */
            .modal-content {
                padding: 20px 16px;
            }

            .modal-title {
                font-size: 1.4rem;
            }

            .close-modal {
                font-size: 2rem;
            }

            .section-title {
                font-size: 1.2rem;
                margin-bottom: 16px;
            }

            .comparison-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .card-header .card-title {
                font-size: 1.1rem;
            }

            .stat-value {
                font-size: 1rem;
            }

            .stat-label {
                font-size: 0.7rem;
            }

            .features-list li {
                font-size: 0.85rem;
            }

            .savings-summary {
                padding: 18px 16px;
            }

            .savings-title {
                font-size: 1.1rem;
            }

            .disclaimer-mini {
                font-size: 0.75rem;
            }
        }

        /* 超小屏幕 (小于400px) 进一步优化 */
        @media (max-width: 400px) {
            .estimator-header h1 {
                font-size: 1.7rem;
            }

            .billing-tab {
                font-size: 0.8rem;
                padding: 10px 1px;
            }

            .option-group {
                grid-template-columns: repeat(2, 1fr);
            }

            .option-label {
                font-size: 0.75rem;
                padding: 10px 2px;
            }

            .total-cost {
                font-size: 2.2rem;
            }

            .bar-label {
                width: 70px;
                font-size: 0.75rem;
            }
        }

        /* PC响应式保持不变 */
        @media (min-width: 992px) {
   body { padding: 0px; }
            .estimator-header h1 { font-size: 3rem; }
            .billing-tab { padding: 18px 8px; }
            .option-group { gap: 18px; }
        }