/* ========== 页面加载动画 ========== */
        .page-loader {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, #eef0f3, #dce0e6);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            z-index: 99999;
            transition: opacity 0.6s ease, visibility 0.6s ease;
        }
        .page-loader.hidden {
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
        }
        .loader-icon {
            font-size: 3.5rem;
            margin-bottom: 16px;
            animation: pulse 1.5s ease-in-out infinite;
        }
        .loader-text {
            font-size: 1.1rem;
            color: #2c5a6e;
            font-weight: 500;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }
        .loader-dots {
            display: inline-block;
            animation: dotPulse 1.4s steps(4, end) infinite;
            content: '...';
        }
        .loader-dots::after {
            content: '...';
            animation: dotPulse 1.4s steps(4, end) infinite;
        }
        @keyframes pulse {
            0%, 100% { transform: scale(1); opacity: 0.8; }
            50% { transform: scale(1.08); opacity: 1; }
        }
        @keyframes dotPulse {
            0% { opacity: 0; }
            50% { opacity: 1; }
            100% { opacity: 0; }
        }
        .loader-progress {
            margin-top: 12px;
            width: 200px;
            height: 3px;
            background: rgba(44, 90, 110, 0.15);
            border-radius: 4px;
            overflow: hidden;
        }
        .loader-progress-bar {
            height: 100%;
            width: 0%;
            background: linear-gradient(90deg, #2c5a6e, #5b8ea0);
            border-radius: 4px;
            transition: width 0.3s ease;
        }
        .loader-sub {
            margin-top: 8px;
            font-size: 0.75rem;
            color: #9aaebf;
        }

        /* ========== 登录弹窗专用样式 ========== */
        .input-field {
            width: 100%;
            padding: 10px 12px;
            font-size: 1rem;
            border: 1px solid #ccc;
            border-radius: 30px;
            box-sizing: border-box;
            height: 44px;
            margin: 8px 0;
        }
        .captcha-row {
            display: flex !important;
            gap: 10px;
            align-items: center;
            margin: 10px 0;
            flex-wrap: nowrap !important;
        }
        .captcha-row img {
            height: 44px;
            width: 140px;
            border-radius: 8px;
            border: 1px solid #ddd;
            cursor: pointer;
            background: #fafafa;
            flex-shrink: 0;
        }
        .captcha-row input {
            flex: 1;
            height: 44px;
            min-width: 80px;
            padding: 8px 12px;
            border: 1px solid #ccc;
            border-radius: 30px;
            font-size: 1rem;
            box-sizing: border-box;
            outline: none;
        }
        .captcha-row input:focus {
            border-color: #2c5a6e;
        }
        .captcha-hint {
            text-align: center;
            margin-top: 8px;
            font-size: 0.7rem;
            color: #999;
        }
        .modal-content button {
            width: 100%;
            padding: 12px;
            background-color: #2c5a6e;
            color: white;
            border: none;
            border-radius: 44px;
            font-size: 1rem;
            font-weight: 600;
            margin-top: 16px;
            cursor: pointer;
            transition: 0.2s;
        }
        .modal-content button:hover {
            background-color: #1e3f4f;
        }
        footer {
            text-align: center;
            font-size: 0.7rem;
            color: #bbccdd;
            margin-top: 32px;
        }
        .modal-content {
            min-width: 300px;
        }
        @media (max-width: 480px) {
            .captcha-row img {
                width: 100px;
                height: 38px;
            }
            .captcha-row input {
                height: 38px;
                font-size: 0.85rem;
            }
            .modal-content {
                min-width: auto;
                padding: 16px;
            }
        }