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

html, body {
    overflow-x: hidden;
    width: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* 头部样式 */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 0.2rem;
}

.logo p {
    font-size: 0.9rem;
    color: #666;
    font-weight: 400;
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav a:hover {
    color: #667eea;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #667eea;
    transition: width 0.3s ease;
}

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

.nav a.active {
    color: #667eea;
    font-weight: 600;
}

.nav a.active::after {
    width: 100%;
}

/* 主要内容区域 */
.main {
    background: white;
    margin-top: 0;
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero h2 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}



/* 所有名字区域 */
.all-names {
    padding: 4rem 0;
    background: #f8f9fa;
}

.all-names h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

/* 名字分类模块 */
.name-category {
    background: white;
    margin-bottom: 3rem;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.name-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

.name-category h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: #333;
    font-weight: 600;
}

.name-category p {
    color: #666;
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    max-width: 800px;
}


/* 名字网格 */
.names-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.name-card {
    background: white;
    padding: 1rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    border: 2px solid transparent;
}

.name-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: #667eea;
}

.name-card .name {
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
}

.name-card .category {
    font-size: 0.9rem;
    color: #666;
    background: #f1f3f4;
    padding: 4px 12px;
    border-radius: 15px;
    display: inline-block;
}


/* 小贴士区域 */
.tips {
    padding: 4rem 0;
    background: #f8f9fa;
}

.tips h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.tip-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.tip-card:hover {
    transform: translateY(-5px);
}

.tip-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #333;
}

.tip-card p {
    color: #666;
    line-height: 1.6;
}

/* 关于区域 */
.about {
    padding: 4rem 0;
    background: white;
    text-align: center;
}

.about h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #333;
}

.about p {
    font-size: 1.1rem;
    color: #666;
    max-width: 800px;
    margin: 0 auto 1.5rem;
    line-height: 1.8;
}

/* 页脚 */
.footer {
    background: #333;
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.footer p {
    margin-bottom: 0.5rem;
}

.footer a {
    color: #667eea;
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}


/* 响应式设计 */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav a {
        font-size: 0.9rem;
        padding: 0.5rem 0.8rem;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .names-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 0.8rem;
    }
    
    .tips-grid {
        grid-template-columns: 1fr;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 2rem 0;
    }
    
    .hero h2 {
        font-size: 1.8rem;
    }
    
    .nav {
        gap: 0.5rem;
    }
    
    .nav a {
        font-size: 0.8rem;
        padding: 0.4rem 0.6rem;
    }
    
    .names-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 0.6rem;
    }
    
    .name-card {
        padding: 0.8rem;
    }
    
    .name-card .name {
        font-size: 1rem;
    }
    
    .back-to-top {
        bottom: 15px;
        right: 15px;
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}

@media (max-width: 360px) {
    .container {
        padding: 0 10px;
    }
    
    .hero h2 {
        font-size: 1.5rem;
    }
    
    .nav a {
        font-size: 0.75rem;
        padding: 0.3rem 0.5rem;
    }
    
    .names-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
        gap: 0.5rem;
    }
    
    .name-card {
        padding: 0.6rem;
    }
    
    .name-card .name {
        font-size: 0.9rem;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.name-card {
    animation: fadeInUp 0.6s ease forwards;
}

.name-card:nth-child(even) {
    animation-delay: 0.1s;
}

.name-card:nth-child(3n) {
    animation-delay: 0.2s;
}

/* 加载动画 */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.loading::after {
    content: '';
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #667eea;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #5a67d8;
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 1000;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: #5a67d8;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.back-to-top:active {
    transform: translateY(-1px);
}