/* ===== 弹窗 ===== */
        .modal-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.55);
            z-index: 1000;
            justify-content: center;
            align-items: center;
            backdrop-filter: blur(4px);
            padding: 20px;
        }
        .modal-overlay.active {
            display: flex;
        }
        .modal-box {
            background: #fff;
            border-radius: 16px;
            max-width: 420px;
            width: 100%;
            padding: 36px 32px 32px;
            position: relative;
            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
            animation: modalFadeIn 0.3s ease;
        }
        @keyframes modalFadeIn {
            from { opacity: 0; transform: scale(0.92) translateY(20px); }
            to { opacity: 1; transform: scale(1) translateY(0); }
        }
        .modal-close {
            position: absolute;
            top: 12px;
            right: 16px;
            background: none;
            border: none;
            font-size: 24px;
            color: #999;
            cursor: pointer;
            transition: color 0.2s;
            line-height: 1;
        }
        .modal-close:hover { color: #333; }
        .modal-box .modal-icon {
            text-align: center;
            font-size: 48px;
            margin-bottom: 8px;
        }
        .modal-box h3 {
            font-size: 20px;
            font-weight: 700;
            color: #222;
            text-align: center;
            margin-bottom: 4px;
        }
        .modal-box .modal-sub {
            font-size: 14px;
            color: #888;
            text-align: center;
            margin-bottom: 20px;
        }
        .modal-box .form-group {
            margin-bottom: 16px;
        }
        .modal-box .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 500;
            color: #333;
            margin-bottom: 4px;
        }
        .modal-box .form-group label .required {
            color: var(--primary);
        }
        .modal-box .form-group input {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 14px;
            transition: border-color 0.2s;
            outline: none;
            font-family: inherit;
        }
        .modal-box .form-group input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(198,40,40,0.1);
        }
        .modal-box .form-group input::placeholder {
            color: #bbb;
        }
        .modal-box .btn-submit {
            width: 100%;
            padding: 12px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            margin-top: 4px;
        }
        .modal-box .btn-submit:hover { background: var(--primary-dark); }
        .modal-box .btn-submit:disabled {
            opacity: 0.6;
            cursor: not-allowed;
        }
        .modal-box .form-tip {
            font-size: 12px;
            color: #999;
            text-align: center;
            margin-top: 12px;
            line-height: 1.6;
        }
        .modal-box .form-tip .highlight {
            color: var(--primary);
            font-weight: 500;
        }
        .modal-box .success-state {
            display: none;
            text-align: center;
            padding: 16px 0 8px;
        }
        .modal-box .success-state .check {
            font-size: 56px;
            margin-bottom: 8px;
        }
        .modal-box .success-state h4 {
            font-size: 20px;
            color: #222;
            margin-bottom: 4px;
        }
        .modal-box .success-state p {
            font-size: 14px;
            color: #888;
            line-height: 1.6;
        }
        .modal-box .success-state .phone-highlight {
            color: var(--primary);
            font-weight: 600;
            font-size: 16px;
        }
        .modal-box.success .form-content { display: none; }
        .modal-box.success .success-state { display: block; }