:root {
    --primary-color: #4285f4;
    --primary-hover: #3367d6;
    --secondary-color: #34a853;
    --secondary-hover: #2d8e47;
    --accent-color: #fbbc05;
    --danger-color: #ea4335;
    --light-gray: #f8f9fa;
    --medium-gray: #e9ecef;
    --dark-gray: #6c757d;
    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
}

.tool-content {
    padding: 30px;
    background-color: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 30px;
}

.tool-header {
    text-align: center;
    margin-bottom: 30px;
}

.tool-header h1 {
    font-size: 2.2rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.tool-header p {
    font-size: 1.1rem;
    color: var(--dark-gray);
}

/* 布局优化 */
.qr-generator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.qr-form-container {
    grid-column: 1;
}

.qr-preview-wrapper {
    grid-column: 2;
    position: sticky;
    top: 20px;
}

/* 表单样式优化 */
.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 15px;
    color: #333;
}

.form-textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--medium-gray);
    border-radius: var(--border-radius);
    font-size: 15px;
    resize: vertical;
    transition: var(--transition);
    min-height: 100px;
}

.form-textarea:focus, .form-select:focus, .form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(66, 133, 244, 0.2);
}

.form-select, .form-input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--medium-gray);
    border-radius: var(--border-radius);
    font-size: 15px;
    transition: var(--transition);
    background-color: white;
}

.form-help {
    font-size: 13px;
    color: var(--dark-gray);
    margin-top: 6px;
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 24px;
}

/* 按钮样式优化 */
.btn {
    padding: 14px 28px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn i {
    font-size: 18px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(66, 133, 244, 0.3);
}

.btn-secondary {
    background-color: var(--light-gray);
    color: #333;
}

.btn-secondary:hover {
    background-color: var(--medium-gray);
    transform: translateY(-2px);
}

.btn-success {
    background-color: var(--secondary-color);
    color: white;
}

.btn-success:hover {
    background-color: var(--secondary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(52, 168, 83, 0.3);
}

/* 结果区域样式 */
.result-section {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 25px;
    height: 100%;
}

.result-title {
    margin-bottom: 20px;
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
    text-align: center;
}

.qr-preview-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 25px;
    background-color: white;
    border-radius: var(--border-radius);
    border: 2px dashed var(--medium-gray);
}

.qr-image {
    max-width: 100%;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.result-actions {
    margin-top: 25px;
    display: flex;
    gap: 15px;
    justify-content: center;
}

/* 字符计数器 */
.char-count {
    font-size: 13px;
    color: var(--dark-gray);
    text-align: right;
    margin-top: 6px;
    transition: var(--transition);
}

.char-count.warning {
    color: var(--danger-color);
    font-weight: 600;
}

/* 分区标题 */
.section-title {
    margin-bottom: 20px;
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title i {
    font-size: 20px;
}

.form-section {
    margin-top: 35px;
    border-top: 1px solid var(--medium-gray);
    padding-top: 25px;
}

/* 颜色预览 */
.color-preview {
    display: inline-block;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    margin-left: 10px;
    vertical-align: middle;
    border: 1px solid #ddd;
    transition: var(--transition);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

/* Logo预览 */
.logo-preview-container {
    margin-top: 15px;
    text-align: center;
}

.logo-preview {
    max-width: 120px;
    max-height: 120px;
    margin-top: 10px;
    border: 2px solid var(--medium-gray);
    border-radius: var(--border-radius);
    padding: 5px;
    background-color: white;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    display: none;
}

/* 底部推荐工具样式 */
.bottom-recommendations {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--medium-gray);
}

/* 加载动画 */
.loading-spinner {
    display: inline-block;
    width: 50px;
    height: 50px;
    border: 4px solid rgba(66, 133, 244, 0.2);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
    margin: 30px auto;
}

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

/* 提示和帮助 */
.tip-box {
    background-color: rgba(66, 133, 244, 0.1);
    border-left: 4px solid var(--primary-color);
    padding: 15px;
    margin-bottom: 25px;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.tip-box p {
    margin: 0;
    color: #333;
}

/* 响应式调整 */
@media (max-width: 992px) {
    .qr-generator-container {
        grid-template-columns: 1fr;
    }
    
    .qr-form-container, .qr-preview-wrapper {
        grid-column: 1;
    }
    
    .qr-preview-wrapper {
        position: static;
    }
}

@media (max-width: 768px) {
    .settings-grid {
        grid-template-columns: 1fr;
    }
    
    .result-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .tool-content {
        padding: 20px;
    }
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 工具提示 */
.tooltip {
    position: relative;
    display: inline-block;
    cursor: help;
}

.tooltip .tooltip-text {
    visibility: hidden;
    width: 200px;
    background-color: #333;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 8px;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -100px;
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 13px;
    font-weight: normal;
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

/* 添加抖动动画 */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.shake {
    animation: shake 0.5s cubic-bezier(.36,.07,.19,.97) both;
}

/* 添加脉冲动画 */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.pulse {
    animation: pulse 1s infinite;
}

/* 添加渐变背景 */
.gradient-btn {
    background: linear-gradient(45deg, var(--primary-color), #5c6bc0);
    transition: all 0.3s ease;
}

.gradient-btn:hover {
    background: linear-gradient(45deg, #5c6bc0, var(--primary-color));
    transform: translateY(-3px);
    box-shadow: 0 7px 14px rgba(50, 50, 93, 0.1), 0 3px 6px rgba(0, 0, 0, 0.08);
}

/* 警告样式 */
.warning {
    color: var(--danger-color);
}

.input-tip {
    margin-top: 8px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 5px;
}

/* 原始的 qr-generator 样式 */
:root {
    --primary-color: #4285f4;
    --primary-hover: #3367d6;
    --secondary-color: #34a853;
    --secondary-hover: #2d8e47;
    --accent-color: #fbbc05;
    --danger-color: #ea4335;
    --light-gray: #f8f9fa;
    --medium-gray: #e9ecef;
    --dark-gray: #6c757d;
    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
}

.tool-content {
    padding: 30px;
    background-color: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 30px;
}

.tool-header {
    text-align: center;
    margin-bottom: 30px;
}

.tool-header h1 {
    font-size: 2.2rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.tool-header p {
    font-size: 1.1rem;
    color: var(--dark-gray);
}

/* 布局优化 */
.qr-generator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.qr-form-container {
    grid-column: 1;
}

.qr-preview-wrapper {
    grid-column: 2;
    position: sticky;
    top: 20px;
}

/* 表单样式优化 */
.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 15px;
    color: #333;
}

.form-textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--medium-gray);
    border-radius: var(--border-radius);
    font-size: 15px;
    resize: vertical;
    transition: var(--transition);
    min-height: 100px;
}

.form-textarea:focus, .form-select:focus, .form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(66, 133, 244, 0.2);
}

.form-select, .form-input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--medium-gray);
    border-radius: var(--border-radius);
    font-size: 15px;
    transition: var(--transition);
    background-color: white;
}

.form-help {
    font-size: 13px;
    color: var(--dark-gray);
    margin-top: 6px;
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 24px;
}

/* 按钮样式优化 */
.btn {
    padding: 14px 28px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn i {
    font-size: 18px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(66, 133, 244, 0.3);
}

.btn-secondary {
    background-color: var(--light-gray);
    color: #333;
}

.btn-secondary:hover {
    background-color: var(--medium-gray);
    transform: translateY(-2px);
}

.btn-success {
    background-color: var(--secondary-color);
    color: white;
}

.btn-success:hover {
    background-color: var(--secondary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(52, 168, 83, 0.3);
}

/* 结果区域样式 */
.result-section {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 25px;
    height: 100%;
}

.result-title {
    margin-bottom: 20px;
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
    text-align: center;
}

.qr-preview-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 25px;
    background-color: white;
    border-radius: var(--border-radius);
    border: 2px dashed var(--medium-gray);
}

.qr-image {
    max-width: 100%;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.result-actions {
    margin-top: 25px;
    display: flex;
    gap: 15px;
    justify-content: center;
}

/* 字符计数器 */
.char-count {
    font-size: 13px;
    color: var(--dark-gray);
    text-align: right;
    margin-top: 6px;
    transition: var(--transition);
}

.char-count.warning {
    color: var(--danger-color);
    font-weight: 600;
}

/* 分区标题 */
.section-title {
    margin-bottom: 20px;
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title i {
    font-size: 20px;
}

.form-section {
    margin-top: 35px;
    border-top: 1px solid var(--medium-gray);
    padding-top: 25px;
}

/* 颜色预览 */
.color-preview {
    display: inline-block;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    margin-left: 10px;
    vertical-align: middle;
    border: 1px solid #ddd;
    transition: var(--transition);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

/* Logo预览 */
.logo-preview-container {
    margin-top: 15px;
    text-align: center;
}

.logo-preview {
    max-width: 120px;
    max-height: 120px;
    margin-top: 10px;
    border: 2px solid var(--medium-gray);
    border-radius: var(--border-radius);
    padding: 5px;
    background-color: white;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    display: none;
}

/* 底部推荐工具样式 */
.bottom-recommendations {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--medium-gray);
}

/* 加载动画 */
.loading-spinner {
    display: inline-block;
    width: 50px;
    height: 50px;
    border: 4px solid rgba(66, 133, 244, 0.2);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
    margin: 30px auto;
}

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

/* 提示和帮助 */
.tip-box {
    background-color: rgba(66, 133, 244, 0.1);
    border-left: 4px solid var(--primary-color);
    padding: 15px;
    margin-bottom: 25px;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.tip-box p {
    margin: 0;
    color: #333;
}

/* 响应式调整 */
@media (max-width: 992px) {
    .qr-generator-container {
        grid-template-columns: 1fr;
    }
    
    .qr-form-container, .qr-preview-wrapper {
        grid-column: 1;
    }
    
    .qr-preview-wrapper {
        position: static;
    }
}

@media (max-width: 768px) {
    .settings-grid {
        grid-template-columns: 1fr;
    }
    
    .result-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .tool-content {
        padding: 20px;
    }
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 工具提示 */
.tooltip {
    position: relative;
    display: inline-block;
    cursor: help;
}

.tooltip .tooltip-text {
    visibility: hidden;
    width: 200px;
    background-color: #333;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 8px;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -100px;
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 13px;
    font-weight: normal;
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

/* 添加抖动动画 */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.shake {
    animation: shake 0.5s cubic-bezier(.36,.07,.19,.97) both;
}

/* 添加脉冲动画 */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.pulse {
    animation: pulse 1s infinite;
}

/* 添加渐变背景 */
.gradient-btn {
    background: linear-gradient(45deg, var(--primary-color), #5c6bc0);
    transition: all 0.3s ease;
}

.gradient-btn:hover {
    background: linear-gradient(45deg, #5c6bc0, var(--primary-color));
    transform: translateY(-3px);
    box-shadow: 0 7px 14px rgba(50, 50, 93, 0.1), 0 3px 6px rgba(0, 0, 0, 0.08);
}

/* 警告样式 */
.warning {
    color: var(--danger-color);
}

.input-tip {
    margin-top: 8px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 5px;
}