/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #2c3e50;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8eb 100%);
    min-height: 100vh;
}

/* 导航栏样式 */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    font-size: 2rem;
    font-weight: 800;
    text-decoration: none;
    background: linear-gradient(45deg, #2980b9, #3498db, #2980b9);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradient 3s ease infinite;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-menu a {
    color: #34495e;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #3498db;
    transition: width 0.3s ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

/* 登录按钮样式 */
.nav-auth {
    display: flex;
    align-items: center;
}

.nav-auth a {
    display: inline-flex;
    align-items: center;
    padding: 0.6rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    color: white;
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.2);
    transition: all 0.3s ease;
}

.nav-auth a:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(52, 152, 219, 0.3);
}

/* 主容器样式 */
.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

h1 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.usage-count {
    text-align: center;
    color: #7f8c8d;
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

/* 工具容器样式 */
.tool-container {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

/* 编辑器布局 */
.editor-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

/* 工具栏样式 */
.toolbar {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.tool-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    color: #4a5568;
    background: #f7fafc;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tool-btn:hover {
    background: #edf2f7;
    transform: translateY(-2px);
}

.tool-btn.primary {
    color: white;
    background: linear-gradient(135deg, #4299e1 0%, #3182ce 100%);
}

.tool-btn.primary:hover {
    background: linear-gradient(135deg, #3182ce 0%, #2c5282 100%);
    box-shadow: 0 4px 15px rgba(66, 153, 225, 0.3);
}

/* 输入区域样式 */
.input-section {
    display: flex;
    flex-direction: column;
}

#inputText {
    flex: 1;
    min-height: 500px;
    padding: 1.5rem;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 16px;
    line-height: 1.8;
    resize: none;
    transition: all 0.3s ease;
}

#inputText:focus {
    outline: none;
    border-color: #4299e1;
    box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.1);
}

/* 预览区域样式 */
.preview-section {
    display: flex;
    flex-direction: column;
}

.style-toolbar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
    padding: 1rem;
    background: #f8fafc;
    border-radius: 12px;
}

.style-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.style-group label {
    font-weight: 500;
    color: #4a5568;
}

.style-group select {
    flex: 1;
    padding: 0.5rem;
    border: 2px solid #e2e8f0;
    border-radius: 6px;
    font-size: 0.95rem;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.style-group select:focus {
    outline: none;
    border-color: #4299e1;
    box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.1);
}

.preview-content {
    flex: 1;
    min-height: 500px;
    padding: 1.5rem;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    background: white;
    overflow-y: auto;
}

/* 使用说明样式 */
.notice-box {
    margin-top: 4rem;
    padding: 2.5rem;
    background: linear-gradient(135deg, #fff8e1 0%, #fffdf7 100%);
    border-radius: 20px;
    border-left: 5px solid #f39c12;
    box-shadow: 0 10px 30px rgba(243, 156, 18, 0.1);
}

.notice-box h3 {
    color: #f39c12;
    font-size: 1.6rem;
    margin-bottom: 2rem;
    text-align: center;
    font-weight: 800;
}

.notice-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.notice-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 12px;
    transition: transform 0.3s ease;
}

.notice-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(243, 156, 18, 0.1);
}

.notice-icon {
    font-size: 2rem;
    line-height: 1;
    padding: 1rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.notice-text h4 {
    color: #2c3e50;
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.notice-text p {
    color: #7f8c8d;
    font-size: 0.95rem;
    line-height: 1.5;
}

/* 底部版权样式 */
.footer {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 2rem 0;
    margin-top: 4rem;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

.footer p {
    color: #7f8c8d;
    font-size: 0.95rem;
    margin: 0.5rem 0;
}

.footer a {
    color: #3498db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: #2980b9;
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        padding: 1rem;
        flex-wrap: wrap;
    }

    .nav-menu {
        order: 3;
        width: 100%;
        gap: 1rem;
        margin-top: 1rem;
        overflow-x: auto;
        padding-bottom: 0.5rem;
        -webkit-overflow-scrolling: touch;
    }

    .editor-wrapper {
        grid-template-columns: 1fr;
    }

    .style-toolbar {
        grid-template-columns: 1fr;
    }

    .notice-content {
        grid-template-columns: 1fr;
    }
}

/* 动画效果 */
@keyframes gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}