/* 全局初始化 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 页面主体 */
body {
    background: #0A0A0F;
    color: #EAEAEA;
    font-family: sans-serif;
    overflow-x: hidden;
}

/* 居中容器 */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* 主题色 */
:root {
    --cyan: #00F0FF;
    --border: #222230;
    --card: #121218;
}

/*--------------------------*/
/* 鼠标光点 */
/*--------------------------*/
.light {
    position: fixed;
    width: 15px;
    height: 15px;
    background: #00F0FF;
    border-radius: 50%;
    box-shadow: 0 0 20px #00F0FF;
    pointer-events: none;
    z-index: 9999;
    transition: 0.05s;
}

/*--------------------------*/
/* 滚动进度条 */
/*--------------------------*/
.progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    background: var(--cyan);
    width: 0%;
    z-index: 999;
}

/*--------------------------*/
/* 首屏 */
/*--------------------------*/
.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 20px;
}
.hero h1 {
    font-size: 42px;
    color: #fff;
    text-shadow: 0 0 12px var(--cyan);
    margin: 10px 0;
}
.hero p {
    color: #ccc;
    margin-bottom: 20px;
}
.hero button {
    padding: 10px 26px;
    background: transparent;
    border: 1px solid var(--cyan);
    color: var(--cyan);
    cursor: pointer;
    transition: 0.3s;
}
.hero button:hover {
    background: var(--cyan);
    color: #000;
}

/*--------------------------*/
/* 关于我 & 发光头像 */
/*--------------------------*/
.about {
    padding: 70px 0;
}
.section-title {
    text-align: center;
    color: var(--cyan);
    font-size: 22px;
    margin-bottom: 40px;
}
.about-row {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    align-items: center;
    justify-content: center;
}

/* 圆形头像 + 旋转光环 */
.about-left {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
}
.about-left::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    background: conic-gradient(#00F0FF, #FFFFFF, #00F0FF);
    z-index: -1;
    animation: avatarRotate 6s linear infinite;
}
@keyframes avatarRotate {
    100% { transform: rotate(360deg); }
}

.about-right {
    max-width: 500px;
    line-height: 1.8;
    text-align: center;
}

/*--------------------------*/
/* 分类卡片 */
/*--------------------------*/
.categories {
    padding: 70px 0;
}
.card-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}
.card {
    background: var(--card);
    padding: 25px;
    text-align: center;
    border: 1px solid var(--border);
    transition: 0.3s;
}
.card:hover {
    border-color: var(--cyan);
    transform: translateY(-4px);
}
.card h3 {
    color: var(--cyan);
}

/*--------------------------*/
/* 文章列表 */
/*--------------------------*/
.posts {
    padding: 70px 0;
}
.post-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.post-item {
    background: var(--card);
    padding: 20px;
    border: 1px solid var(--border);
    transition: 0.3s;
}
.post-item:hover {
    border-color: var(--cyan);
    transform: translateY(-4px);
}

/*--------------------------*/
/* 底部 */
/*--------------------------*/
footer {
    text-align: center;
    padding: 30px 0;
    border-top: 1px solid var(--border);
    color: #888;
}
/* 原有样式不变，新增以下样式 */
/* 文章图片容器 */
.post-img {
    width: 100%;
    height: 200px;
    border-radius: 4px;
    background-size: cover;
    padding-top: 100%;
    /* /background-image: top; */
    background-position: center 30%;
    /* background-repeat: no-repeat; */
    margin-bottom: 10px;
}

/* 文章分类标签 */
.post-category {
    color: var(--cyan);
    font-size: 12px;
    margin: 5px 0;
}

/* 文章日期 */
.date {
    color: #888;
    font-size: 12px;
    margin: 5px 0;
}

/* 文章内容间距 */
.post-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* 响应式适配（可选） */
@media (max-width: 768px) {
    .post-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    .card-grid {
        grid-template-columns: 1fr !important;
    }
}
@media (max-width: 480px) {
    .post-grid {
        grid-template-columns: 1fr !important;
    }
}
/* 重置样式（解决浏览器兼容） */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 响应式布局 */
@media (max-width: 768px) {
  /* 移动端卡片改为1列 */
  .card-grid, .post-grid {
    grid-template-columns: 1fr !important;
    gap: 15px !important;
  }
  /* 首屏标题字体缩小 */
  .type-title {
    font-size: 28px !important;
  }
  /* 移动端按钮适配 */
  .btn {
    padding: 8px 16px !important;
    font-size: 14px !important;
  }
}

/* 分类卡片选中样式增强 */
.category-card.active {
  border-color: #409eff !important;
  background-color: #e6f7ff !important;
  color: #409eff !important;
  font-weight: bold;
}

/* 图片加载兜底样式 */
.post-item, .about-left {
  background-size: cover;
  background-position: center;
}
/* 图片加载失败时显示默认背景 */
.post-item::before, .about-left::before {
  content: '';
  display: block;
  width: 100%;
  height: 100%;
  background-color: #f5f5f5;
  background-image: url('./static/default-img.png') !important; /* 可自行添加默认图片 */
  background-size: 50px;
  background-repeat: no-repeat;
  background-position: center;
  opacity: 0;
}
.post-item:empty::before, .about-left:empty::before {
  opacity: 1;
}

/* 按钮点击反馈 */
.btn {
  transition: all 0.2s;
  cursor: pointer;
}
.btn:active {
  transform: scale(0.98);
  background-color: #337ecc !important;
}

/* 滚动进度条兼容 */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background-color: #409eff;
  z-index: 9999;
}
/*增加css样式*/
/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Microsoft Yahei", sans-serif;
    /* 确保body占满全屏 */
    min-height: 100vh;
    /* 相对定位，让星空容器绝对定位生效 */
    position: relative;
    /* 隐藏溢出的星星（避免滚动条） */
    overflow-x: hidden;
    /* 文字颜色适配星空背景 */
    color: #fff;
}

/* 星空背景 - 星星基础层 */
.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000 url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect width="100" height="100" fill="%23050210"/><circle cx="10" cy="10" r="1" fill="%23fff" opacity="0.8"/><circle cx="30" cy="40" r="0.8" fill="%23fff" opacity="0.6"/><circle cx="60" cy="20" r="1.2" fill="%23fff" opacity="0.7"/><circle cx="80" cy="70" r="0.9" fill="%23fff" opacity="0.5"/><circle cx="40" cy="80" r="1" fill="%23fff" opacity="0.8"/></svg>') repeat;
    /* 置于最底层 */
    z-index: -2;
    /* 星星大小缩放 */
    background-size: 300px 300px;
}

/* 星空背景 - 闪烁的星星层 */
.twinkling {
    position: fixed;
    top: 0;
    left: 0;
    width: 200%;
    height: 200%;
    background: transparent url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><circle cx="20" cy="20" r="0.5" fill="%23fff" opacity="0.4"/><circle cx="50" cy="50" r="0.7" fill="%23fff" opacity="0.5"/><circle cx="80" cy="30" r="0.6" fill="%23fff" opacity="0.3"/><circle cx="40" cy="70" r="0.8" fill="%23fff" opacity="0.6"/><circle cx="70" cy="80" r="0.5" fill="%23fff" opacity="0.4"/></svg>') repeat;
    z-index: -1;
    background-size: 200px 200px;
    /* 闪烁+移动动画 */
    animation: twinkle 20s linear infinite;
}

/* 星星闪烁动画 */
@keyframes twinkle {
    0% {
        transform: translate(0, 0);
        opacity: 0.2;
    }
    50% {
        opacity: 0.8;
    }
    100% {
        transform: translate(-50%, -50%);
        opacity: 0.2;
    }
}

/* 适配原有内容的样式（确保内容可见） */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 20px;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

.about-row {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.about-left {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background-size: cover;
    background-position: center;
}

.about-right {
    font-size: 1.2rem;
    line-height: 1.8;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.category-card {
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    transition: background 0.3s;
}

.category-card:hover {
    background: rgba(255, 255, 255, 0.2);
}

.posts {
    padding: 4rem 0;
}

footer {
    text-align: center;
    padding: 2rem 0;
    background: rgba(0, 0, 0, 0.5);
    margin-top: 2rem;
}

#enterBtn {
    margin-top: 2rem;
    padding: 0.8rem 2rem;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid #fff;
    color: #fff;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s;
}

#enterBtn:hover {
    background: rgba(255, 255, 255, 0.3);
}