/* 基础设置 */
:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --text-color: #333;
    --white: #fff;
    --max-width: 1200px;
    --header-height: 60px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    overflow-x: hidden;
}

/* 导航栏样式 */
header {
    background-color: rgba(0, 0, 0, 0.9);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    height: var(--header-height);
}

nav {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

nav .logo h1 {
    color: var(--white);
    font-size: 1.5rem;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    color: var(--white);
    text-decoration: none;
    transition: color 0.3s;
}

nav a:hover {
    color: var(--primary-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-direction: row-reverse; /* 改变方向，让图标在右边 */
}

.cat-icon {
    width: 20px;
    height: 20px;
    background-color: #ffffff;
    border-radius: 50%;
    position: relative;
    margin: 0 0 0 5px; /* 修改边距：上 右 下 左 */
    z-index: 1;
}

/* 耳朵容器 */
.cat-icon::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 0;
    width: 10px;
    height: 10px;
    background-color: #ffffff;
    clip-path: polygon(0 100%, 50% 0, 100% 100%);
    z-index: 2;
    transform: rotate(-30deg);
}

.cat-icon::after {
    content: '';
    position: absolute;
    top: -6px;
    right: 0;
    width: 10px;
    height: 10px;
    background-color: #ffffff;
    clip-path: polygon(0 100%, 50% 0, 100% 100%);
    z-index: 2;
    transform: rotate(30deg);
}

/* 胡须样式 */
.whiskers::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 50%;
    width: 8px;
    height: 1px;
    background-color: #ffffff;
    box-shadow: 
        0 -3px 0 #ffffff,
        0 3px 0 #ffffff;
    transform: rotate(-10deg);
}

.whiskers::after {
    content: '';
    position: absolute;
    right: -8px;
    top: 50%;
    width: 8px;
    height: 1px;
    background-color: #ffffff;
    box-shadow: 
        0 -3px 0 #ffffff,
        0 3px 0 #ffffff;
    transform: rotate(10deg);
}

.whiskers {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

/* 英雄区样式 */
.hero {
    min-height: 100vh; /* 使用最小高度 */
    width: 100vw; /* 使用视口宽度 */
    position: relative;
    overflow: hidden;
    margin: 0;
    padding: 0;
    left: 0;
    top: 0;
}

/* 太空背景 */
.space-background {
    position: absolute;
    width: 100vw;
    height: 100vh;
    background: radial-gradient(ellipse at bottom, #1B2735 0%, #090A0F 100%);
    left: 0;
    top: 0;
    margin: 0;
    padding: 0;
}

/* 星星效果 */
.stars {
    position: absolute;
    width: 100%;
    height: 100%;
}

.stars::before,
.stars::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, #fff, rgba(0,0,0,0)),
        radial-gradient(2px 2px at 40px 70px, #fff, rgba(0,0,0,0)),
        radial-gradient(2px 2px at 50px 160px, #fff, rgba(0,0,0,0)),
        radial-gradient(2px 2px at 90px 40px, #fff, rgba(0,0,0,0)),
        radial-gradient(2px 2px at 130px 80px, #fff, rgba(0,0,0,0)),
        radial-gradient(2px 2px at 160px 120px, #fff, rgba(0,0,0,0));
    background-repeat: repeat;
    background-size: 200px 200px;
    animation: twinkle 4s ease-in-out infinite;
}

.stars::after {
    background-position: 100px 100px;
    animation-delay: 2s;
}
/* 太阳系容器 */
.solar-system {
    position: absolute;
    width: 100%;
    height: 100%;
    transform: scale(0.7);
    left: 10%;
    top: 0;
}

/* 太阳 */
.sun {
    position: absolute;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle at center,
        #fff 0%,
        #ffd200 20%,
        #f7971e 40%,
        #ff4e50 100%
    );
    border-radius: 50%;
    left: 20%;
    top: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 
        0 0 120px #ff4e50,
        0 0 60px #ff4e50,
        0 0 30px #ff4e50;
    animation: sunGlow 4s ease-in-out infinite alternate;
}

/* 轨道基础样式 */
.orbit {
    position: absolute;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    left: 20%;
    top: 50%;
    transform: translate(-50%, -50%);
}

/* 各个轨道大小和动画 */
.mercury-orbit {
    width: 350px;
    height: 350px;
    animation: rotate 4s linear infinite;
}

.venus-orbit {
    width: 550px;
    height: 550px;
    animation: rotate 6.5s linear infinite;
}

.earth-orbit {
    width: 750px;
    height: 750px;
    animation: rotate 10s linear infinite;
}

.mars-orbit {
    width: 950px;
    height: 950px;
    animation: rotate 15s linear infinite;
}

.jupiter-orbit {
    width: 1200px;
    height: 1200px;
    animation: rotate 25s linear infinite;
}

.saturn-orbit {
    width: 1500px;
    height: 1500px;
    animation: rotate 35s linear infinite;
}

/* 行星基础样式 */
.planet {
    position: absolute;
    border-radius: 50%;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
}

/* 各个行星样式 */
.mercury {
    width: 25px;
    height: 25px;
    background: linear-gradient(45deg, #727272, #a8a8a8);
}

.venus {
    width: 45px;
    height: 45px;
    background: linear-gradient(45deg, #e6b980, #eacda3);
}

.earth {
    width: 50px;
    height: 50px;
    background: radial-gradient(circle at 30% 30%,
        #4b9fe1 0%,
        #1a4e95 50%,
        #0a2d5c 100%
    );
}

.mars {
    width: 40px;
    height: 40px;
    background: linear-gradient(45deg, #c1440e, #d36f39);
}

.jupiter {
    width: 100px;
    height: 100px;
    background: linear-gradient(
        to bottom,
        #c1440e 0%,
        #d36f39 20%,
        #bf8456 40%,
        #d36f39 60%,
        #c1440e 100%
    );
    position: relative;
    overflow: hidden;
}

.jupiter::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 8px,
        rgba(255, 255, 255, 0.1) 8px,
        rgba(255, 255, 255, 0.1) 16px
    );
}

.saturn {
    width: 90px;
    height: 90px;
    background: linear-gradient(45deg, #e6c588, #b69c6f);
    position: relative;
}

/* 土星环 */
.rings {
    position: absolute;
    width: 200%;
    height: 10px;
    background: linear-gradient(
        90deg,
        rgba(230, 197, 136, 0),
        rgba(230, 197, 136, 0.5) 15%,
        rgba(230, 197, 136, 0.5) 85%,
        rgba(230, 197, 136, 0)
    );
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(20deg);
    border-radius: 50%;
    box-shadow: 
        0 2px 0 rgba(230, 197, 136, 0.3),
        0 -2px 0 rgba(230, 197, 136, 0.3);
}

/* 动画定义 */
@keyframes rotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes twinkle {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.8; }
}

@keyframes sunGlow {
    from { box-shadow: 0 0 120px #ff4e50, 0 0 60px #ff4e50, 0 0 30px #ff4e50; }
    to { box-shadow: 0 0 150px #ff4e50, 0 0 80px #ff4e50, 0 0 40px #ff4e50; }
}
/* 英雄区内容 */
.hero-content {
    position: absolute;
    right: 10%;
    top: 50%;
    transform: translateY(-50%);
    color: var(--white);
    text-align: center;
    z-index: 1;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
    
    /* 添加渐变色文字效果 */
    background: linear-gradient(
        45deg,
        #ff6b6b,
        #4ecdc4,
        #45b7d1,
        #a06cd5
    );
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    background-size: 300% 300%;
    animation: gradient 6s ease-in-out infinite;
}
/* 添加渐变动画定义 */
@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.hero-content p {
    font-size: 1.5rem;  /* 增大字体 */
    opacity: 0.9;     /* 增加不透明度 */
    font-weight: 500; /* 稍微加粗 */
    color: #F5F5DC;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
    animation: textPulse 2s ease-in-out infinite;
}
@keyframes textPulse {
    0%, 100% {
        transform: scale(1);
        text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
    }
    50% {
        transform: scale(1.05);
        text-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
    }
}

/* 通用区域样式 */
section {
    padding: 4rem 2rem;
}

section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--secondary-color);
}

/* 文章区域 */
.posts-section {
    background: #f9f9f9;
    max-width: var(--max-width);
    margin: 0 auto;
}

.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.post-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.post-card:hover {
    transform: translateY(-5px);
}

.post-image {
    height: 200px;
    overflow: hidden;
}

.post-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.post-card:hover .post-image img {
    transform: scale(1.1);
}

.post-content {
    padding: 1.5rem;
}

.post-content h3 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.post-meta {
    display: flex;
    gap: 1rem;
    color: #666;
    font-size: 0.9rem;
    margin-top: 1rem;
}

.post-meta i {
    margin-right: 0.5rem;
}

/* 视频区域 */
.videos-section {
    background: var(--white);
    max-width: var(--max-width);
    margin: 0 auto;
}

.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.video-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.video-card:hover {
    transform: translateY(-5px);
}

.video-thumbnail {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    transition: background 0.3s;
}

.video-card:hover .play-button {
    background: var(--primary-color);
}

.video-info {
    padding: 1.5rem;
}

.video-info h3 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

/* 查看全部按钮 */
.view-all {
    text-align: center;
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background: var(--primary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 5px;
    transition: background 0.3s;
}

.btn:hover {
    background: #2980b9;
}
/* 联系方式区域 */
.contact-section {
    background: #f9f9f9;
    text-align: center;
    padding: 4rem 2rem;
}

.contact-content {
    max-width: var(--max-width);
    margin: 0 auto;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-top: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 2rem;
    background: var(--white);
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.contact-item:hover {
    transform: translateY(-5px);
}

.contact-item i {
    font-size: 2rem;
    color: var(--primary-color);
}

.contact-item p {
    font-size: 1.1rem;
    color: var(--secondary-color);
}

/* 页脚 */
footer {
    background: var(--secondary-color);
    color: var(--white);
    text-align: center;
    padding: 2rem;
}

.footer-bottom {
    max-width: var(--max-width);
    margin: 0 auto;
    opacity: 0.8;
}

/* 动画效果 */
@keyframes textGlow {
    from { text-shadow: 0 0 10px rgba(255, 255, 255, 0.5); }
    to { text-shadow: 0 0 20px rgba(255, 255, 255, 0.8); }
}
@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}
/* 响应式设计 */
@media (max-width: 1200px) {
    .solar-system {
        transform: scale(0.6);
        left: -10%;
    }

    .hero-content {
        right: 5%;
    }
}

@media (max-width: 768px) {
    /* 导航栏响应式 */
    nav {
        padding: 0 1rem;
    }

    nav .logo h1 {
        color: var(--white);
        font-size: 1.5rem;
        margin: 0; /* 确保标题没有额外的边距 */
    }

    nav ul {
        gap: 1rem;
    }

    /* 英雄区响应式 */
    .solar-system {
        transform: scale(0.4);
        left: -20%;
    }

    .hero-content {
        right: 50%;
        transform: translate(50%, -50%);
        width: 90%;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    /* 文章和视频网格响应式 */
    .posts-grid,
    .videos-grid {
        grid-template-columns: 1fr;
        padding: 0 1rem;
    }

    /* 联系方式响应式 */
    .contact-info {
        flex-direction: column;
        gap: 2rem;
    }

    .contact-item {
        width: 100%;
        justify-content: center;
    }

    /* 区域标题响应式 */
    section h2 {
        font-size: 2rem;
        margin-bottom: 2rem;
    }
}

@media (max-width: 480px) {
    /* 超小屏幕适配 */
    .hero {
        height: 60vh;
    }

    .solar-system {
        transform: scale(0.35);
        left: -30%;
    }

    nav ul {
        display: none; /* 可以添加汉堡菜单替代 */
    }

.hero-content h1 {
    font-size: 3rem;
}

    .post-card,
    .video-card {
        margin: 0 1rem;
    }

    .btn {
        padding: 0.6rem 1.5rem;
        font-size: 0.9rem;
    }
}

/* 打印样式 */
@media print {
    .hero,
    .videos-section,
    nav,
    footer {
        display: none;
    }

    .posts-section {
        padding: 0;
    }

    .post-card {
        break-inside: avoid;
        box-shadow: none;
    }
}