/* 全局样式 */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --text: #1a1a1a;
    --text-light: #666666;
    --border: #e5e5e5;
    --background: #f8f9fa;
    --surface: #ffffff;
    --surface-light: #F8F9FA;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 16px;
    --container: 1200px;
    --header-height: 64px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: var(--background);
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* 头部导航 */
.header {
    height: 60px;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo {
    font-size: 20px;
    font-weight: 500;
    color: var(--text);
    text-decoration: none;
}

.member-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: #666;
    text-decoration: none;
    font-size: 13px;
    padding: 4px 8px;
    border-radius: 4px;
    background: rgba(0, 0, 0, 0.04);
}

.member-link i {
    font-size: 10px;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.search-wrapper {
    position: relative;
}

.search-bar {
    position: relative;
    width: 180px;
}

.search-bar input {
    width: 100%;
    height: 32px;
    padding: 0 32px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: rgba(0, 0, 0, 0.03);
    font-size: 13px;
    color: var(--text);
    transition: all 0.2s;
}

.search-bar input:focus {
    outline: none;
    background: #fff;
    border-color: var(--primary);
    width: 220px;
}

.search-bar i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
    font-size: 13px;
}

.btn-login {
    height: 32px;
    padding: 0 16px;
    background: var(--primary);
    color: #fff;
    border-radius: 16px;
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    transition: all 0.2s;
}

.btn-login:hover {
    background: var(--primary-dark);
}

/* 左侧分类导航 */
.category-nav {
    position: fixed;
    left: 50%;
    transform: translateX(-50%);
    top: 60px;
    bottom: 0;
    width: var(--container);
    padding: 24px 0;
    overflow: visible;
    pointer-events: none;
    z-index: 10;
}

.category-nav ul {
    list-style: none;
    padding: 24px;
    width: 200px;
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    position: relative;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    pointer-events: auto;
}

.category-nav ul::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.2));
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: -1;
}

.category-nav li {
    margin-bottom: 4px;
}

.category-nav a {
    color: var(--text);
    text-decoration: none;
    display: flex;
    align-items: center;
    padding: 12px 16px;
    font-size: 14px;
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.category-nav a::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
}

.category-nav a:hover {
    background: rgba(0, 0, 0, 0.03);
    transform: translateX(4px);
}

.category-nav a:hover::before {
    opacity: 0.05;
}

.category-nav a.active {
    background: rgba(76, 175, 80, 0.1);
    color: var(--primary);
    font-weight: 500;
}

.category-nav a.active::before {
    opacity: 0.1;
}

.category-nav a i {
    width: 20px;
    margin-right: 12px;
    font-size: 15px;
    color: var(--text-light);
    position: relative;
    z-index: 1;
    transition: all 0.3s ease;
}

.category-nav a:hover i,
.category-nav a.active i {
    color: var(--primary);
    transform: scale(1.1);
}

/* 主内容区域 */
.main-content {
    max-width: var(--container);
    margin: 0 auto;
    margin-top: 60px;
    padding: 24px 24px 24px 224px;
    width: 100%;
    box-sizing: border-box;
}

/* 应用卡片网格 */
.app-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    width: 100%;
    margin: 0 auto;
}

.app-card {
    background: var(--surface);
    border-radius: 12px;
    overflow: hidden;
    text-decoration: none;
    transition: all 0.2s;
    border: 1px solid var(--border);
    height: 100%;
    display: flex;
    flex-direction: column;
    width: 100%;
}

.app-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.app-image {
    aspect-ratio: 2/1;
    background: var(--surface);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px;
    position: relative;
    width: 100%;
    overflow: hidden;
}

.app-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, var(--gradient-from), var(--gradient-to));
    opacity: 0.95;
    transition: opacity 0.3s ease;
}

.app-image img {
    width: 64px;
    height: 64px;
    object-fit: contain;
    position: relative;
    z-index: 1;
    border-radius: 12px;
    filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
    transition: all 0.3s ease;
    opacity: 0;
    transform: scale(0.95) translateY(10px);
}

.app-image img.loaded {
    opacity: 1;
    transform: scale(1) translateY(0);
}

/* 懒加载占位动画 */
.app-image::after {
    content: '';
    position: absolute;
    width: 64px;
    height: 64px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.1);
    z-index: 1;
    animation: pulse 1.5s ease-in-out infinite;
}

.app-image img.loaded + .app-image::after {
    display: none;
}

@keyframes pulse {
    0% {
        opacity: 0.6;
    }
    50% {
        opacity: 0.3;
    }
    100% {
        opacity: 0.6;
    }
}

/* 鼠标悬停效果 */
.app-card:hover .app-image img {
    transform: scale(1.1) translateY(-5px);
    filter: drop-shadow(0 8px 12px rgba(0, 0, 0, 0.15));
}

.app-card:hover .app-image::before {
    opacity: 1;
}

.app-info {
    padding: 16px;
    background: #fff;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.app-info h3 {
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 8px;
    line-height: 1.4;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.app-info .description {
    font-size: 13px;
    color: var(--text-light);
    margin: 0;
    line-height: 1.5;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 移除特定软件类型的固定渐变色 */
.app-card[data-type] .app-image::before {
    background: linear-gradient(45deg, var(--gradient-from), var(--gradient-to));
}

/* 分类标题 */
.category-section {
    margin-bottom: 32px;
}

.category-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.category-title h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text);
    margin: 0;
}

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-light);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s ease;
}

.text-link:hover {
    color: var(--text);
}

.text-link i {
    font-size: 12px;
    transition: transform 0.2s ease;
}

.text-link:hover i {
    transform: translateX(4px);
}

/* 分类区域 */
.categories {
    padding: 6rem 0;
    background: var(--surface);
    position: relative;
    overflow: hidden;
}

.categories::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(to right, 
        transparent 0%, 
        var(--primary) 50%, 
        transparent 100%);
    opacity: 0.2;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 3rem;
    position: relative;
}

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text);
    position: relative;
    padding-left: 1rem;
}

.section-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 24px;
    background: var(--primary);
    border-radius: 2px;
}

.view-all {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: #666666;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.view-all:hover {
    color: #333333;
    background: rgba(0, 0, 0, 0.05);
    border-color: #999999;
}

.view-all i {
    transition: transform 0.3s;
}

.view-all:hover i {
    transform: translateX(4px);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.category-card {
    background: var(--surface-light);
    border-radius: var(--radius);
    overflow: hidden;
    text-decoration: none;
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.category-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

.card-content {
    padding: 2.5rem 2rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.category-card i {
    font-size: 2.5rem;
    color: var(--primary);
    transition: transform 0.3s;
}

.category-card:hover i {
    transform: scale(1.1);
}

.category-card h3 {
    color: var(--text);
    font-size: 1.1rem;
    margin: 0;
    font-weight: 600;
}

.category-card .count {
    color: var(--text-light);
    font-size: 0.9rem;
    padding: 0.25rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
}

/* 应用卡片样式 */
.featured,
.new-releases {
    padding: 6rem 0;
    background: var(--background);
}

/* 响应式调整 */
@media (max-width: 1400px) {
    .app-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 1200px) {
    .category-nav,
    .main-content {
        max-width: 100%;
    }
    
    .category-nav {
        left: 0;
        transform: none;
        width: 200px;
    }
    
    .category-nav ul {
        margin-left: 24px;
        width: 176px;
    }
    
    .main-content {
        padding-left: 224px;
}

    .app-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .category-nav {
        display: none;
    }

    .main-content {
        padding: 24px;
    }

    .app-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 16px;
    }
}

@media (max-width: 576px) {
    .app-grid {
        grid-template-columns: 1fr;
    }
    
    .main-content {
        padding: 16px;
    }
}

/* 页脚 */
.footer {
    background: var(--surface);
    padding: 2rem 0;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer p {
    color: var(--text-light);
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--primary);
}

.btn-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--primary);
    color: var(--background);
    padding: 1rem 2.5rem;
    border-radius: var(--radius);
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid var(--primary);
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.btn-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        120deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    transition: 0.5s;
}

.btn-cta:hover {
    transform: translateY(-2px);
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.4);
}

.btn-cta:hover::before {
    left: 100%;
}

.btn-cta i {
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.btn-cta:hover i {
    transform: translateX(4px);
}