* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #333;
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    overflow: hidden;
}

header {
    text-align: center;
    padding: 30px 20px;
    background: #ffffff;
}

h1 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 10px;
}

.subtitle {
    color: #7f8c8d;
    font-size: 1.1rem;
}

.upload-section {
    text-align: center;
}

.upload-area {
    border: 2px dashed #3498db;
    border-radius: 10px;
    padding: 40px 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: #fafafa;
    margin-bottom: 20px;
}

.upload-area:hover {
    background-color: #f0f8ff;
    border-color: #2980b9;
}

.upload-area.dragover {
    background-color: #e1f0fa;
    border-color: #2980b9;
}

.upload-icon {
    font-size: 3rem;
    color: #3498db;
    margin-bottom: 15px;
}

.upload-text {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: #555;
}

.upload-btn {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 12px 30px;
    font-size: 1rem;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.upload-btn:hover {
    background-color: #2980b9;
}

#fileInput {
    display: none;
}

.preview-section {
    padding: 30px 0;
    display: none;
}

.preview-container {
    position: relative;
    max-width: 100%;
    margin-bottom: 20px;
    overflow: hidden;
}

#image {
    max-width: 100%;
    display: block;
}

.toolbar {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
}

.ratio-btn {
    padding: 10px 15px;
    background: #ecf0f1;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.ratio-btn.active {
    background: #3498db;
    color: white;
}

.ratio-btn:hover:not(.active) {
    background: #d5dbdb;
}

.action-buttons {
    text-align: center;
    margin-top: 20px;
}

.crop-btn {
    background-color: #27ae60;
    color: white;
    border: none;
    padding: 12px 30px;
    font-size: 1rem;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.crop-btn:hover {
    background-color: #219653;
}

.instructions {
    border-radius: 10px;
    margin-top: 20px;
    padding: 30px;
    background: #f8f9fa;
    border: 1px solid #eee;
}

.instructions h2 {
    text-align: center;
    margin-bottom: 20px;
    color: #2c3e50;
}

.steps {
    max-width: 600px;
    margin: 0 auto;
}

.step {
    display: flex;
    margin-bottom: 20px;
}

.step-number {
    background: #3498db;
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-right: 15px;
    font-weight: bold;
}

.step-text {
    padding-top: 5px;
}

footer {
    text-align: center;
    padding: 20px;
    color: #7f8c8d;
    font-size: 0.9rem;
    background: #ffffff;
}

/* 语言切换器样式 */
#language-switcher {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.language-btn {
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 8px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    font-size: 14px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.language-btn:hover {
    background-color: #f5f5f5;
}

#current-flag {
    margin-right: 5px;
}

.dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    background-color: #fff;
    min-width: 200px;
    max-height: 300px;
    overflow-y: auto;
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
    z-index: 1001;
    border: 1px solid #ddd;
    border-radius: 4px;
    margin-top: 5px;
}

.dropdown-content a {
    color: #333;
    padding: 10px 15px;
    text-decoration: none;
    display: flex;
    align-items: center;
    border-bottom: 1px solid #eee;
}

.dropdown-content a:hover {
    background-color: #f5f5f5;
}

.dropdown-content .lang-flag {
    margin-right: 10px;
}

.dropdown-show {
    display: block;
}

/* 当前选中的语言样式 */
.current-lang {
    background-color: #e3f2fd;
    font-weight: bold;
}

@media (max-width: 600px) {
    .container {
        margin: 10px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .toolbar {
        flex-direction: column;
        align-items: center;
    }
    
    .ratio-btn {
        width: 80%;
    }
    
    #language-switcher {
        top: 10px;
        right: 10px;
    }
}