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

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.logo {
    font-size: 3.5rem;
    font-weight: bold;
    color: white;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    margin-bottom: 10px;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4);
    background-size: 400% 400%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 4s ease-in-out infinite;
}

@keyframes gradientShift {

    0%,
    100% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }
}

.subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 20px;
}

.search-container {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.search-box {
    width: 100%;
    padding: 15px 50px 15px 20px;
    border: none;
    border-radius: 50px;
    font-size: 16px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.search-box:focus {
    outline: none;
    background: white;
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.search-btn {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: linear-gradient(45deg, #667eea, #764ba2);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.search-btn:hover {
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.category {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.category:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.15);
}

.category-title {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.category-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: white;
}

.frontend {
    background: linear-gradient(45deg, #ff6b6b, #ee5a24);
}

.backend {
    background: linear-gradient(45deg, #4ecdc4, #44bd32);
}

.database {
    background: linear-gradient(45deg, #45b7d1, #3742fa);
}

.devops {
    background: linear-gradient(45deg, #96ceb4, #00d2d3);
}

.mobile {
    background: linear-gradient(45deg, #feca57, #ff9ff3);
}

.ai {
    background: linear-gradient(45deg, #ff9ff3, #54a0ff);
}

.design {
    background: linear-gradient(45deg, #5f27cd, #00d2d3);
}

.tools {
    background: linear-gradient(45deg, #ff6348, #2f3542);
}

.cloud {
    background: linear-gradient(45deg, #74b9ff, #0984e3);
}

.community {
    background: linear-gradient(45deg, #fd79a8, #e84393);
}

.personal {
    background: linear-gradient(45deg, #fdcb6e, #f39c12);
}

.api {
    background: linear-gradient(45deg, #00cec9, #00b894);
}

.repository {
    background: linear-gradient(45deg, #6c5ce7, #a29bfe);
}

.links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    max-height: 300px;
    overflow-y: hidden;
    transition: max-height 0.3s ease;
}

.links.expanded {
    max-height: none;
    overflow-y: visible;
}

.link-item {
    display: block;
    padding: 12px 16px;
    background: rgba(0, 0, 0, 0.03);
    border-radius: 12px;
    text-decoration: none;
    color: #333;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.link-item:hover {
    background: rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.link-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.link-item:hover::before {
    left: 100%;
}

.expand-btn {
    display: block;
    width: 100%;
    padding: 12px;
    background: rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    color: #666;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 15px;
    font-size: 14px;
}

.expand-btn:hover {
    background: rgba(0, 0, 0, 0.1);
    color: #333;
    transform: translateY(-2px);
}

.expand-btn.collapse {
    background: rgba(0, 0, 0, 0.08);
    color: #333;
}

.category-footer {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin: 40px 0;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-item {
    text-align: center;
    color: white;
}

.stat-number {
    font-size: 2rem;
    font-weight: bold;
    display: block;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

footer {
    text-align: center;
    margin-top: 60px;
    padding: 30px;
    color: rgba(255, 255, 255, 0.8);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.icp-info {
    margin-top: 15px;
    font-size: 14px;
    opacity: 0.9;
}

.icp-info a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: all 0.3s ease;
    padding: 4px 8px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.1);
}

.icp-info a:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.icp-info a:active {
    transform: translateY(0);
}

.icp-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    align-items: center;
}

.icp-item {
    display: flex;
    align-items: center;
}

.beian-icon {
    width: 16px;
    height: 16px;
    vertical-align: text-bottom;
    margin-right: 6px;
    filter: brightness(0.9);
    transition: filter 0.3s ease;
    position: relative;
    top: -1px;
}

.icp-info a:hover .beian-icon {
    filter: brightness(1.2);
}

/* 移动端响应式样式 */
@media (max-width: 768px) {
    .icp-info {
        flex-direction: column;
        gap: 8px;
    }
    
    .icp-item {
        justify-content: center;
    }
    
    .logo {
        font-size: 2.5rem;
    }

    .categories {
        grid-template-columns: 1fr;
    }

    .stats {
        flex-direction: column;
        gap: 20px;
    }

    .links {
        grid-template-columns: 1fr;
    }
}

.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 25px;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
}

.filter-tab:hover,
.filter-tab.active {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}