/* ==================== 头部样式 ==================== */
.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo h1 {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo span {
    font-size: 12px;
    color: var(--text-lighter);
    display: none;
}

@media (min-width: 768px) {
    .logo span {
        display: block;
    }
}

/* 搜索框 */
.search-box {
    display: flex;
    flex: 1;
    max-width: 500px;
    margin: 0 40px;
}

.search-box input {
    flex: 1;
    padding: 10px 16px;
    border: 2px solid var(--border-color);
    border-right: none;
    border-radius: var(--radius) 0 0 var(--radius);
    font-size: 14px;
    outline: none;
    transition: border-color 0.3s;
}

.search-box input:focus {
    border-color: var(--primary-color);
}

.search-box button {
    padding: 10px 24px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 0 var(--radius) var(--radius) 0;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: background 0.3s;
}

.search-box button:hover {
    background: var(--secondary-color);
}

.header-right {
    display: flex;
    gap: 20px;
}

.header-right .nav-link {
    color: var(--text-color);
    font-weight: 500;
}

.header-right .nav-link:hover {
    color: var(--primary-color);
}

/* 导航菜单 */
.nav {
    display: flex;
    gap: 8px;
    padding: 12px 0;
    border-top: 1px solid var(--border-color);
    overflow-x: auto;
}

.nav a {
    padding: 8px 16px;
    border-radius: var(--radius);
    white-space: nowrap;
    font-weight: 500;
    transition: all 0.3s;
}

.nav a:hover {
    background: var(--bg-color);
}

.nav a.active {
    background: var(--primary-color);
    color: var(--white);
}

/* ==================== 横幅区域 ==================== */
.banner {
    background: var(--white);
    padding: 24px 0;
}

.banner-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 992px) {
    .banner-content {
        grid-template-columns: 1fr 280px;
    }
}

/* 轮播 */
.banner-carousel {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 360px;
}

.carousel-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s;
}

.carousel-item.active {
    opacity: 1;
}

.carousel-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.carousel-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 40px 24px 24px;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    color: var(--white);
}

.carousel-caption h3 {
    font-size: 24px;
    margin-bottom: 8px;
}

.carousel-caption p {
    font-size: 14px;
    opacity: 0.9;
}

.carousel-indicators {
    position: absolute;
    bottom: 16px;
    right: 24px;
    display: flex;
    gap: 8px;
}

.carousel-indicators span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    cursor: pointer;
    transition: all 0.3s;
}

.carousel-indicators span.active {
    background: var(--white);
    transform: scale(1.2);
}

/* 最新更新侧边栏 */
.update-card {
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    padding: 20px;
}

.update-card h3 {
    font-size: 16px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-color);
}

.update-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.update-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    border-bottom: 1px dashed var(--border-color);
}

.update-list li:last-child {
    border-bottom: none;
}

.update-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.update-info {
    flex: 1;
    min-width: 0;
}

.update-info .name {
    font-weight: 500;
    color: var(--text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.update-info .version {
    font-size: 12px;
    color: var(--text-lighter);
}

/* ==================== 精选推荐 ==================== */
.recommend-section {
    background: var(--white);
}

.recommend-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

@media (min-width: 768px) {
    .recommend-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 992px) {
    .recommend-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.recommend-item {
    background: var(--white);
    border-radius: var(--radius);
    padding: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
    cursor: pointer;
}

.recommend-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.recommend-item .icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 12px;
    border-radius: var(--radius);
    background: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
}

.recommend-item .name {
    font-weight: 600;
    text-align: center;
    margin-bottom: 4px;
}

.recommend-item .desc {
    font-size: 12px;
    color: var(--text-lighter);
    text-align: center;
    margin-bottom: 12px;
}

.recommend-item .actions {
    display: flex;
    gap: 8px;
}

.recommend-item .btn {
    flex: 1;
    text-align: center;
    padding: 6px 12px;
    font-size: 13px;
}

/* ==================== 排行榜 ==================== */
.ranking-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 992px) {
    .ranking-content {
        grid-template-columns: 1fr 280px;
    }
}

.ranking-tabs {
    display: flex;
    gap: 16px;
}

.ranking-tabs span {
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.ranking-tabs span.active {
    background: var(--primary-color);
    color: var(--white);
}

.ranking-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ranking-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    background: var(--white);
    border-radius: var(--radius);
    transition: all 0.3s;
}

.ranking-item:hover {
    box-shadow: var(--shadow);
}

.ranking-item .rank {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}

.ranking-item .rank.top1 { background: #f59e0b; color: var(--white); }
.ranking-item .rank.top2 { background: #94a3b8; color: var(--white); }
.ranking-item .rank.top3 { background: #d97706; color: var(--white); }
.ranking-item .rank.default { background: var(--bg-color); color: var(--text-lighter); }

.ranking-item .icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    background: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.ranking-item .info {
    flex: 1;
}

.ranking-item .name {
    font-weight: 600;
    margin-bottom: 2px;
}

.ranking-item .meta {
    font-size: 12px;
    color: var(--text-lighter);
}

.ranking-item .download-btn {
    padding: 6px 16px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: var(--radius-sm);
    font-size: 13px;
}

.ranking-item .download-btn:hover {
    background: var(--secondary-color);
}

/* 排行榜侧边栏 */
.ranking-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.quick-download, .hot-tags {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 20px;
}

.quick-download h3, .hot-tags h3 {
    font-size: 16px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.quick-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.quick-list a {
    padding: 8px 12px;
    background: var(--bg-color);
    border-radius: var(--radius-sm);
    text-align: center;
    transition: all 0.3s;
}

.quick-list a:hover {
    background: var(--primary-color);
    color: var(--white);
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    padding: 6px 12px;
    background: var(--bg-color);
    border-radius: 20px;
    font-size: 13px;
    transition: all 0.3s;
}

.tag:hover {
    background: var(--primary-color);
    color: var(--white);
}

/* ==================== 软件分类 ==================== */
.category-section {
    background: var(--white);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

@media (min-width: 576px) {
    .category-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 768px) {
    .category-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.category-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px 16px;
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    transition: all 0.3s;
}

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

.category-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    color: var(--white);
}

.category-card h4 {
    font-size: 16px;
    margin-bottom: 4px;
}

.category-card p {
    font-size: 12px;
    color: var(--text-lighter);
}

/* ==================== 热门软件 ==================== */
.hot-software {
    background: var(--bg-color);
}

.software-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

@media (min-width: 768px) {
    .software-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

.software-card {
    display: flex;
    gap: 16px;
    padding: 16px;
    background: var(--white);
    border-radius: var(--radius);
    transition: all 0.3s;
}

.software-card:hover {
    box-shadow: var(--shadow);
}

.software-card .icon {
    width: 72px;
    height: 72px;
    border-radius: var(--radius);
    background: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    flex-shrink: 0;
}

.software-card .content {
    flex: 1;
    min-width: 0;
}

.software-card .name {
    font-weight: 600;
    font-size: 16px;
    margin-bottom: 4px;
}

.software-card .desc {
    font-size: 13px;
    color: var(--text-lighter);
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.software-card .meta {
    display: flex;
    gap: 16px;
    font-size: 12px;
    color: var(--text-lighter);
}

.software-card .btn {
    padding: 8px 16px;
    font-size: 13px;
    align-self: center;
}

/* ==================== 合作伙伴 ==================== */
.partner-section {
    background: var(--white);
    padding: 30px 0;
}

.partner-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
    opacity: 0.7;
}

.partner-logo {
    width: 120px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.partner-logo img {
    max-width: 100%;
    max-height: 100%;
}

/* ==================== 底部 ==================== */
.footer {
    background: #1a1a2e;
    color: #a0a0a0;
    padding: 50px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}

.footer h3 {
    color: var(--white);
    font-size: 16px;
    margin-bottom: 16px;
}

.footer p {
    line-height: 1.8;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

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

.footer-qrcode .qrcode-box {
    text-align: center;
}

.qrcode {
    width: 100px;
    height: 100px;
    background: var(--white);
    border-radius: var(--radius);
    margin: 0 auto 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-lighter);
    font-size: 12px;
}

.footer-bottom {
    margin-top: 40px;
    padding: 20px 0;
    border-top: 1px solid #333;
    text-align: center;
    font-size: 13px;
}

.footer-bottom a {
    color: #a0a0a0;
}

.footer-bottom a:hover {
    color: var(--white);
}

/* ==================== 返回顶部 ==================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    box-shadow: var(--shadow);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}