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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f8f8;
}

a {
    text-decoration: none;
    color: #333;
    transition: all 0.3s ease;
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: #ff6b81;
    color: #fff;
    border-radius: 4px;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
}

.btn:hover {
    background-color: #ff4757;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 107, 129, 0.3);
}

.btn-small {
    padding: 8px 15px;
    font-size: 14px;
}

.more {
    color: #ff6b81;
    font-size: 14px;
    font-weight: 600;
    display: flex;
    align-items: center;
}

.more:hover {
    color: #ff4757;
}

.more:after {
    content: "→";
    margin-left: 5px;
    transition: all 0.3s ease;
}

.more:hover:after {
    transform: translateX(3px);
}

/* 导航栏样式 */
header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo a {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: 700;
    color: #ff6b81;
}

.logo svg {
    margin-right: 10px;
}

nav ul {
    display: flex;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    font-size: 16px;
    font-weight: 500;
    padding: 10px 0;
    position: relative;
}

nav ul li a:hover {
    color: #ff6b81;
}

nav ul li a:after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #ff6b81;
    transition: all 0.3s ease;
}

nav ul li a:hover:after {
    width: 100%;
}

/* 主横幅样式 */
.banner {
    background-image: linear-gradient(135deg, #ff9a9e 0%, #fad0c4 100%);
    padding: 80px 0;
    margin-bottom: 40px;
    position: relative;
    overflow: hidden;
}

.banner:before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../picture/c21.jpg');
    background-size: cover;
    background-position: center;
    opacity: 0.2;
    z-index: 0;
}

.banner-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: #fff;
    max-width: 700px;
    margin: 0 auto;
}

.banner-content h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.banner-content p {
    font-size: 18px;
    margin-bottom: 30px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* 通用部分样式 */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.section-header h2 {
    font-size: 28px;
    font-weight: 700;
    color: #333;
    position: relative;
    padding-left: 15px;
}

.section-header h2:before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 5px;
    height: 25px;
    background-color: #ff6b81;
    border-radius: 3px;
}

/* 卡片容器样式 */
.card-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

/* 卡片样式 */
.card {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.card-img {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all 0.5s ease;
}

.card:hover .card-img img {
    transform: scale(1.05);
}

.update-tag {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: #ff6b81;
    color: #fff;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.card-content {
    padding: 15px;
}

.card-content h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}

.card-content p {
    font-size: 14px;
    color: #666;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 分类浏览样式 */
.category-section {
    padding: 40px 0;
}

.category-container {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 15px;
}

.category-item {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

.category-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.category-item img {
    width: 100%;
    height: 120px;
    object-fit: cover;
}

.category-item h3 {
    font-size: 16px;
    font-weight: 600;
    margin: 10px 0;
}

.category-link {
    display: block;
    padding: 8px 0;
    background-color: #f8f8f8;
    color: #ff6b81;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.category-link:hover {
    background-color: #ff6b81;
    color: #fff;
}

/* APP下载模块样式 */
.app-section {
    background-color: #fff;
    padding: 60px 0;
    margin: 40px 0;
    position: relative;
    overflow: hidden;
}

.app-section:before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(135deg, #fad0c4 0%, #ff9a9e 100%);
    opacity: 0.05;
    z-index: 0;
}

.app-content {
    display: flex;
    align-items: center;
    position: relative;
    z-index: 1;
}

.app-info {
    flex: 1;
    padding-right: 50px;
}

.app-info h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 15px;
    color: #333;
}

.app-info p {
    font-size: 18px;
    color: #666;
    margin-bottom: 25px;
}

.app-features {
    margin-bottom: 30px;
}

.app-features li {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    font-size: 16px;
    color: #555;
}

.icon-check {
    display: inline-block;
    width: 20px;
    height: 20px;
    background-color: #ff6b81;
    border-radius: 50%;
    margin-right: 10px;
    position: relative;
}

.icon-check:before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
    width: 5px;
    height: 10px;
    border-bottom: 2px solid #fff;
    border-right: 2px solid #fff;
}

.app-buttons {
    display: flex;
    gap: 15px;
}

.btn-app {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 25px;
    border-radius: 4px;
    font-weight: 600;
    color: #fff;
    transition: all 0.3s ease;
}

.android {
    background-color: #3ddc84;
}

.android:hover {
    background-color: #32b96c;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(61, 220, 132, 0.3);
}

.ios {
    background-color: #000;
}

.ios:hover {
    background-color: #333;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.icon-android, .icon-apple {
    margin-right: 8px;
    font-size: 18px;
}

.app-image {
    flex: 1;
    text-align: center;
}

.app-image img {
    max-width: 300px;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* 漫画资讯样式 */
.news-section {
    padding: 40px 0;
}

.news-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.news-item {
    display: flex;
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.news-img {
    width: 300px;
    height: 200px;
    overflow: hidden;
}

.news-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all 0.5s ease;
}

.news-item:hover .news-img img {
    transform: scale(1.05);
}

.news-content {
    flex: 1;
    padding: 20px;
}

.news-content h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
}

.news-meta {
    font-size: 14px;
    color: #888;
    margin-bottom: 10px;
}

.news-excerpt {
    font-size: 14px;
    color: #666;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.read-more {
    color: #ff6b81;
    font-size: 14px;
    font-weight: 600;
}

.read-more:hover {
    color: #ff4757;
}

/* 排行榜样式 */
.ranking-section {
    padding: 40px 0;
}

.ranking-tabs {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.tab-header {
    display: flex;
    border-bottom: 1px solid #eee;
}

.tab {
    flex: 1;
    text-align: center;
    padding: 15px 0;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab.active {
    color: #ff6b81;
    border-bottom: 2px solid #ff6b81;
}

.tab-content {
    padding: 20px;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

.ranking-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.ranking-item {
    display: flex;
    align-items: center;
    padding: 10px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.ranking-item:hover {
    background-color: #f8f8f8;
}

.rank {
    width: 24px;
    height: 24px;
    background-color: #f0f0f0;
    color: #888;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin-right: 10px;
}

.ranking-item:nth-child(1) .rank,
.ranking-item:nth-child(2) .rank,
.ranking-item:nth-child(3) .rank {
    background-color: #ff6b81;
    color: #fff;
}

.ranking-item img {
    width: 50px;
    height: 70px;
    object-fit: cover;
    border-radius: 4px;
    margin-right: 10px;
}

.ranking-info {
    flex: 1;
}

.ranking-info h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 5px;
}

.ranking-info p {
    font-size: 12px;
    color: #888;
}

.hot-value {
    font-size: 14px;
    color: #ff6b81;
    font-weight: 600;
}

/* 页脚样式 */
footer {
    background-color: #2c3e50;
    color: #fff;
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    margin-bottom: 30px;
}

.footer-logo {
    display: flex;
    align-items: center;
    margin-bottom: 30px;
}

.footer-logo svg {
    margin-right: 10px;
}

.footer-logo span {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
}

.footer-nav {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.footer-column {
    width: 25%;
    margin-bottom: 20px;
}

.footer-column h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #fff;
}

.footer-column ul li {
    margin-bottom: 10px;
}

.footer-column ul li a {
    color: #bdc3c7;
    font-size: 14px;
    transition: all 0.3s ease;
}

.footer-column ul li a:hover {
    color: #ff6b81;
}

.social-links {
    display: flex;
    margin-bottom: 20px;
}

.social-link {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 10px;
    transition: all 0.3s ease;
}

.social-link:hover {
    background-color: #ff6b81;
    transform: translateY(-3px);
}

.btn-footer {
    display: inline-block;
    padding: 10px 20px;
    background-color: #ff6b81;
    color: #fff;
    border-radius: 4px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-footer:hover {
    background-color: #ff4757;
    transform: translateY(-2px);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright {
    font-size: 14px;
    color: #bdc3c7;
}

.copyright p {
    margin-bottom: 5px;
}

.footer-links a {
    color: #bdc3c7;
    font-size: 14px;
    margin-left: 20px;
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: #ff6b81;
}

.friend-links {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.friend-links h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #fff;
}

.friend-links ul {
    display: flex;
    flex-wrap: wrap;
}

.friend-links ul li {
    margin-right: 15px;
    margin-bottom: 10px;
}

.friend-links ul li a,
.friend-links a {
    color: #bdc3c7;
    font-size: 14px;
    transition: all 0.3s ease;
}

.friend-links ul li a:hover,
.friend-links a:hover {
    color: #ff6b81;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .card-container {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .category-container {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .app-content {
        flex-direction: column;
    }
    
    .app-info {
        padding-right: 0;
        margin-bottom: 30px;
    }
}

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        height: auto;
        padding: 15px;
    }
    
    .logo {
        margin-bottom: 15px;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    nav ul li {
        margin: 5px 10px;
    }
    
    .banner-content h1 {
        font-size: 32px;
    }
    
    .card-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .category-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-item {
        flex-direction: column;
    }
    
    .news-img {
        width: 100%;
    }
    
    .ranking-list {
        grid-template-columns: 1fr;
    }
    
    .footer-column {
        width: 50%;
    }
}

@media (max-width: 480px) {
    .card-container {
        grid-template-columns: 1fr;
    }
    
    .category-container {
        grid-template-columns: 1fr;
    }
    
    .footer-column {
        width: 100%;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .copyright {
        margin-bottom: 15px;
    }
    
    .footer-links a {
        margin: 0 10px;
    }
}

/* 图标样式 */
.icon-weibo, .icon-wechat, .icon-qq, .icon-douyin {
    display: inline-block;
    width: 20px;
    height: 20px;
    background-color: #fff;
    border-radius: 50%;
    position: relative;
}

.icon-weibo:before {
    content: "微";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 12px;
    color: #ff6b81;
}

.icon-wechat:before {
    content: "微";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 12px;
    color: #ff6b81;
}

.icon-qq:before {
    content: "Q";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 12px;
    color: #ff6b81;
}

.icon-douyin:before {
    content: "抖";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 12px;
    color: #ff6b81;
}

/* 透明轮播背景 */
.banner {
    position: relative;
    animation: gradientBG 15s ease infinite;
    background-size: 400% 400%;
}

@keyframes gradientBG {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* 卡片悬浮效果增强 */
.card {
    position: relative;
    overflow: hidden;
}

.card:before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(to right, #ff9a9e, #fad0c4);
    transform: translateY(-100%);
    transition: all 0.3s ease;
}

.card:hover:before {
    transform: translateY(0);
}

/* 页面加载动画 */
.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: #ff9a9e;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: #ff6b81;
}

/* 页面背景图案 */
body {
    background-image: 
        radial-gradient(#ff9a9e 1px, transparent 1px),
        radial-gradient(#ff9a9e 1px, transparent 1px);
    background-size: 50px 50px;
    background-position: 0 0, 25px 25px;
    background-color: #f8f8f8;
    background-attachment: fixed;
    background-blend-mode: overlay;
}

/* 卡片内容渐变边框效果 */
.card-content {
    position: relative;
    z-index: 1;
}

.card-content:before {
    content: "";
    position: absolute;
    top: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(to right, #ff9a9e, #fad0c4);
    opacity: 0;
    transition: all 0.3s ease;
}

.card:hover .card-content:before {
    opacity: 1;
}

/* 导航栏动画效果增强 */
nav ul li {
    position: relative;
    overflow: hidden;
}

nav ul li a:before {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 0;
    background-color: rgba(255, 107, 129, 0.1);
    transition: all 0.3s ease;
    z-index: -1;
}

nav ul li a:hover:before {
    height: 100%;
}

/* 页脚波浪效果 */
footer {
    position: relative;
}

footer:before {
    content: "";
    position: absolute;
    top: -20px;
    left: 0;
    width: 100%;
    height: 20px;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%232c3e50" fill-opacity="1" d="M0,224L60,213.3C120,203,240,181,360,181.3C480,181,600,203,720,213.3C840,224,960,224,1080,208C1200,192,1320,160,1380,144L1440,128L1440,320L1380,320C1320,320,1200,320,1080,320C960,320,840,320,720,320C600,320,480,320,360,320C240,320,120,320,60,320L0,320Z"></path></svg>') no-repeat;
    background-size: cover;
}

/* 按钮脉冲效果 */
.btn, .btn-small, .btn-app, .btn-footer {
    position: relative;
    overflow: hidden;
}

.btn:after, .btn-small:after, .btn-app:after, .btn-footer:after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }
    100% {
        transform: scale(20, 20);
        opacity: 0;
    }
}

.btn:focus:not(:active)::after,
.btn-small:focus:not(:active)::after,
.btn-app:focus:not(:active)::after,
.btn-footer:focus:not(:active)::after {
    animation: ripple 1s ease-out;
}

/* 排行榜数字样式增强 */
.rank {
    position: relative;
    overflow: hidden;
}

.rank:after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0) 50%);
}

/* 卡片图片悬停缩放效果优化 */
.card-img {
    overflow: hidden;
}

.card-img img {
    transition: transform 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.card:hover .card-img img {
    transform: scale(1.08);
}

/* 分类项目悬停效果增强 */
.category-item {
    transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.category-item:hover {
    transform: translateY(-8px) scale(1.02);
}

.category-item:after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.category-item:hover:after {
    opacity: 1;
}

/* 新闻项目悬停效果增强 */
.news-item {
    transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.news-item:hover {
    transform: translateY(-8px) scale(1.01);
}

/* APP下载区域视觉增强 */
.app-section {
    position: relative;
}

.app-section:after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('data:image/svg+xml;utf8,<svg width="20" height="20" xmlns="http://www.w3.org/2000/svg"><g fill="%23ff9a9e" fill-opacity="0.05"><circle cx="3" cy="3" r="1"/><circle cx="13" cy="13" r="1"/></g></svg>');
    pointer-events: none;
}

/* 友情链接样式优化 */
.friend-links ul {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.friend-links ul li a,
.friend-links a {
    display: inline-block;
    padding: 5px 10px;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    transition: all 0.3s ease;
}

.friend-links ul li a:hover,
.friend-links a:hover {
    background-color: rgba(255, 107, 129, 0.2);
    transform: translateY(-2px);
}

/* 标题文字渐变效果 */
.section-header h2 {
    background: linear-gradient(to right, #ff6b81, #ff9a9e);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

/* 图片加载失败占位样式 */
img {
    min-height: 100px;
    background-color: #f0f0f0;
    position: relative;
}

img:before {
    content: " ";
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background-color: #f0f0f0;
    border-radius: 4px;
}

img:after {
    content: "\2639 图片加载失败";
    display: block;
    font-size: 14px;
    color: #888;
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    text-align: center;
    transform: translateY(-50%);
}