/* 在线留言样式 */
.liuyan-container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 50px 30px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.form-main-container {
    max-width: 900px;
    margin: 0 auto;
}

.form-row {
    display: flex;
    margin-bottom: 28px;
    align-items: flex-start;
}

.form-label {
    flex: 0 0 160px;
    padding: 12px 20px 12px 0;
    font-weight: 600;
    color: #2d3748;
    text-align: right;
    font-size: 15px;
    line-height: 1.5;
}

.form-input-group {
    flex: 1;
    max-width: 600px;
    margin-left: -5px;
}

.liuyan-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s ease;
    background: #f8fafc;
}

.liuyan-input:focus {
    border-color: #4299e1;
    box-shadow: 0 0 0 3px rgba(66,153,225,0.2);
    background: #fff;
    outline: none;
}

.liuyan-input.error {
    border-color: #fc8181;
    background: #fff5f5;
}

.liuyan-info {
    color: #fc8181;
    font-size: 12px;
    line-height: 1.4;
    margin-top: 6px;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.liuyan-info.show {
    opacity: 1;
}

.liuyan-success {
    background: #c6f6d5;
    color: #22543d;
    padding: 16px;
    border-radius: 8px;
    margin: 25px 0;
    border: 1px solid #9ae6b4;
    text-align: center;
    font-size: 15px;
}

.liuyan-submit-btn {
    background: #4299e1;
    color: white;
    padding: 14px 40px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 15px;
    font-weight: 500;
    display: block;
    margin: 30px auto 0;
}

.liuyan-submit-btn:hover:not(:disabled) {
    background: #3182ce;
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(66,153,225,0.3);
}

.liuyan-submit-btn:disabled {
    background: #a0aec0;
    cursor: not-allowed;
    opacity: 0.9;
}

@keyframes liuyan-spin {
    to { transform: rotate(360deg); }
}

.liuyan-submit-btn.loading::after {
    content: "";
    position: absolute;
    right: 20px;
    top: 50%;
    width: 18px;
    height: 18px;
    border: 3px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    transform: translateY(-50%);
    animation: liuyan-spin 0.8s linear infinite;
}

/* 响应式适配 */
@media (max-width: 1200px) {
    .liuyan-container {
        margin: 30px 20px;
        padding: 40px 25px;
    }

    .form-label {
        padding-right: 15px;
    }
}

@media (max-width: 992px) {
    .form-main-container {
        max-width: 700px;
    }

    .form-label {
        flex: 0 0 140px;
        padding-right: 15px;
    }

    .form-input-group {
        max-width: 550px;
    }
}

@media (max-width: 768px) {
    .liuyan-container {
        padding: 30px 20px;
        margin: 20px 15px;
        border-radius: 10px;
    }

    .form-row {
        flex-direction: column;
        margin-bottom: 24px;
    }

    .form-label {
        flex: none;
        text-align: left;
        padding: 0 0 8px 5px;
        width: 100%;
        font-size: 14px;
    }

    .form-input-group {
        max-width: 100%;
        margin-left: 0;
    }

    .liuyan-submit-btn {
        width: 100%;
        padding: 14px;
        margin-top: 20px;
    }
}

@media (max-width: 480px) {
    .liuyan-container {
        padding: 25px 15px;
        margin: 15px 10px;
    }

    .liuyan-input {
        padding: 10px 14px;
        font-size: 13px;
    }

    .liuyan-success {
        padding: 12px;
        font-size: 14px;
    }
}