/* styles.css 新增 */
.wallpaper-card img {
    image-rendering: -webkit-optimize-contrast; /* 优化WebP渲染速度 */
    will-change: transform, opacity; /* 提前通知浏览器准备渲染 */
    transform: translateZ(0); /* 启用GPU加速 */
}

/* 添加懒加载图片的样式 */
.lazy-image {
    opacity: 0;
    transition: opacity 0.5s ease;
    background-color: #f0f0f0;
}

.lazy-image.loaded {
    opacity: 1;
}

/* 基础变量定义 */
:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --header-bg: #f8f9fa;
    --card-bg: #ffffff;
    --card-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --ad-bg: #f0f0f0;
    --accent-color: #4a6fa5;
    --error-color: #e74c3c;
    --preview-bg: rgba(0, 0, 0, 0.9);
}

.dark-mode {
    --bg-color: #1a1a1a;
    --text-color: #f0f0f0;
    --header-bg: #2d2d2d;
    --card-bg: #2d2d2d;
    --card-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    --ad-bg: #333333;
    --accent-color: #5d8fd9;
    --preview-bg: rgba(20, 20, 20, 0.95);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

/* 页眉样式 */
header {
    background-color: var(--header-bg);
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

header h1 {
    font-size: 1.8rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

header h1 i {
    color: var(--accent-color);
}

/* 控制按钮区域 */
.controls {
    display: flex;
    gap: 15px;
    align-items: center;
}

.search-container {
    display: flex;
    align-items: center;
    background-color: var(--bg-color);
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid #ddd;
}

#searchInput {
    padding: 0.6rem;
    border: none;
    outline: none;
    background-color: transparent;
    color: var(--text-color);
    width: 200px;
}

#searchBtn {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 0.6rem;
    cursor: pointer;
    transition: all 0.2s;
}

#searchBtn:hover {
    background-color: #3a5a80;
}

button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

button:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

button:active {
    transform: translateY(0);
}

.info-btn {
    background: none;
    border: none;
    color: var(--accent-color);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0 10px;
    transition: transform 0.2s;
}

.info-btn:hover {
    transform: scale(1.2);
}

/* 广告轮播区 */
.ad-banner {
    background-color: var(--ad-bg);
    padding: 20px 0;
    margin: 20px 0;
    transition: background-color 0.3s;
}

.slideshow-container {
    width: 1200px;
    height: 400px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.slide {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
}

.slide.active {
    opacity: 1;
}

.slide-content {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: flex-end;
    padding: 30px;
}

.slide-text {
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 12px 25px;
    border-radius: 4px;
    font-size: 1.2rem;
    max-width: 80%;
}

/* 导航箭头 */
.prev,
.next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%) scale(0.8);
    font-size: 2rem;
    color: white;
    background-color: rgba(0, 0, 0, 0.5);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10;
    border: none;
    transition: all 0.3s;
    opacity: 0;
}

.slideshow-container:hover .prev,
.slideshow-container:hover .next {
    opacity: 1;
    transform: translateY(-50%) scale(1);
}

.prev:hover,
.next:hover {
    background-color: rgba(0, 0, 0, 0.8);
    transform: translateY(-50%) scale(1.1);
}

.prev {
    left: 20px;
}

.next {
    right: 20px;
}

/* 指示点 */
.dots-container {
    text-align: center;
    padding: 15px 0;
}

.dot {
    cursor: pointer;
    height: 12px;
    width: 12px;
    margin: 0 8px;
    background-color: #bbb;
    border-radius: 50%;
    display: inline-block;
    transition: background-color 0.3s;
}

.dot.active,
.dot:hover {
    background-color: var(--accent-color);
}

/* 壁纸网格布局 */
.wallpapers-grid {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.wallpaper-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    cursor: pointer;
}

.wallpaper-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.wallpaper-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.wallpaper-name {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 8px;
    text-align: center;
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 0.9rem;
}

.wallpaper-card:hover .wallpaper-name {
    opacity: 1;
}

/* 加载指示器 */
.loading-spinner {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    padding: 40px 0;
    color: var(--accent-color);
}

.loading-spinner i {
    font-size: 2.5rem;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* 页脚 */
footer {
    background-color: var(--header-bg);
    padding: 30px 0;
    margin-top: 40px;
    transition: background-color 0.3s;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding: 0 20px;
}

/* 弹窗样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    overflow: auto;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.show {
    opacity: 1;
}

.modal-content {
    background-color: var(--card-bg);
    margin: 5% auto;
    padding: 25px;
    border-radius: 12px;
    width: 80%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    transform: translateY(-20px);
    transition: transform 0.3s ease;
}

.modal.show .modal-content {
    transform: translateY(0);
}

.modal h2 {
    color: var(--accent-color);
    margin-bottom: 20px;
    text-align: center;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
}

.close:hover {
    color: var(--error-color);
}

.info-text {
    line-height: 1.8;
    margin-bottom: 15px;
}

/* 图片预览样式 */
.image-preview {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--preview-bg);
    z-index: 3000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.image-preview.active {
    opacity: 1;
    pointer-events: auto;
}

.image-preview img {
    max-width: 90%;
    max-height: 90%;
    border-radius: 12px;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.5);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.image-preview.active img {
    transform: scale(1);
}

.close-preview {
    position: absolute;
    top: 30px;
    right: 30px;
    color: white;
    font-size: 36px;
    cursor: pointer;
    transition: transform 0.3s, color 0.3s;
}

.close-preview:hover {
    color: var(--accent-color);
    transform: scale(1.2);
}

.image-name {
    position: absolute;
    bottom: 30px;
    left: 0;
    right: 0;
    text-align: center;
    color: white;
    font-size: 1.2rem;
    padding: 10px;
    background-color: rgba(0, 0, 0, 0.5);
    border-radius: 0 0 12px 12px;
}

/* 响应式设计 */
@media (max-width: 1240px) {
    .slideshow-container {
        width: 100%;
        height: 33.33vw;
        border-radius: 0;
    }

    .slide-text {
        font-size: 1rem;
        padding: 10px 20px;
        max-width: 90%;
    }

    .header-content {
        flex-direction: column;
        gap: 15px;
    }

    .wallpapers-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: 15px;
        padding: 15px;
    }
}

@media (max-width: 768px) {
    .slide-text {
        font-size: 0.9rem;
        padding: 8px 15px;
    }

    .wallpapers-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }

    button {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }

    .modal-content {
        width: 95%;
        padding: 15px;
    }

    .search-container {
        width: 150px;
    }

    #searchInput {
        width: 100px;
    }

    .close-preview {
        top: 15px;
        right: 15px;
        font-size: 28px;
    }

    .image-name {
        font-size: 1rem;
        bottom: 15px;
    }
}

/* 开关按钮样式 */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    -webkit-transition: .4s;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    -webkit-transition: .4s;
    transition: .4s;
}

input:checked + .slider {
    background-color: var(--accent-color);
}

input:focus + .slider {
    box-shadow: 0 0 1px var(--accent-color);
}

input:checked + .slider:before {
    -webkit-transform: translateX(26px);
    -ms-transform: translateX(26px);
    transform: translateX(26px);
}

/* Rounded sliders */
.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}