:root {
    --bs-card-bg: transparent !important;
    --primary-color: #6366f1;
    --secondary-color: #22d3ee;
    --glass-bg: rgba(255, 255, 255, 0.18);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
    --card-border: 1px solid rgba(255, 255, 255, 0.3);
    --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

/* 基础布局 */
.container {
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 1.25rem;
    margin: 2rem auto;
    padding: 2rem;
}

/* 头部设计 */
.header {
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
}

.header::after {
    content: '';
    position: absolute;
    bottom: -30px;
    left: -50px;
    width: 150px;
    height: 150px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.header h1,
.header h3 {
    color: var(--primary-color);
    text-align: center;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: relative;
    z-index: 1;
    text-align: center;
}

/* 分类筛选器 */
.category-filter {
    backdrop-filter: blur(8px);
    border-radius: 1rem;
    padding: 1.25rem;
    margin: 1.5rem 0;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.category-badge {
    border: 1px solid rgba(99, 102, 241, 0.2);
    transition: all 0.2s ease;
    margin: 0.25rem;
    padding: 0.5rem 1.25rem;
    border-radius: 0.75rem;
}

.category-badge:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(99, 102, 241, 0.15);
}

/* 留言卡片 */
.message-card {
    background: var(--glass-bg);
    border: var(--card-border);
    border-radius: 1.25rem;
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.message-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.message-card-header {
    background: linear-gradient(90deg, rgba(99, 102, 241, 0.1), transparent);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: 1.25rem;
}

/* 信息项 */
.info-item {
    border-radius: 15px;
    padding: 8px 15px;
    margin: 10px 0;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9em;
    transition: background 0.2s ease;
}

.info-item i {
    color: #0d6efd;
    font-size: 1.1em;
}

.info-item:hover {
    background: rgba(226, 232, 240, 0.6);
}

/* 内容区块 */
.content-box {
    background: linear-gradient(to bottom right, rgba(241, 243, 245, 0.6), rgba(226, 232, 240, 0.4));
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 1rem;
    padding: 1.5rem;
    line-height: 1.7;
    backdrop-filter: blur(4px);
    margin-top: 0.5rem;
}

/* 按钮样式 */
.btn-outline-primary {
    --bs-btn-hover-bg: var(--primary-color);
    --bs-btn-active-bg: var(--primary-color);
    --bs-btn-hover-border-color: var(--primary-color);
}

.report-btn {
    --bs-btn-hover-bg: #ef4444;
    --bs-btn-hover-border-color: #ef4444;
}

.like-btn {
    transition: transform 0.2s, background-color 0.2s;
}

.like-btn.liked {
    animation: likeAnimation 0.6s ease;
    background-color: #28a745 !important;
    border-color: #28a745 !important;
}

@keyframes likeAnimation {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

/* 分页导航 */
.pagination {
    margin: 2rem 0;
}

.pagination .page-link {
    border-radius: 0.75rem;
    margin: 0 0.25rem;
    min-width: 40px;
    text-align: center;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.page-item.active .page-link {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    border-color: transparent;
}

/* 多媒体元素 */
.image-wrapper {
    margin: 1rem 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.image-wrapper img {
    width: 100%;
    height: auto;
    max-width: 1600px;
    display: block;
    margin: 0 auto;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    margin: 1rem 0;
    border-radius: 8px;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* 代码区块 */
.code-block {
    background: #f8f9fa;
    border-radius: 6px;
    padding: 1rem;
    margin: 1rem 0;
    overflow-x: auto;
    font-family: 'Fira Code', Consolas, Monaco, 'Andale Mono', monospace;
    font-size: 0.9em;
    line-height: 1.5;
    border: 1px solid #e9ecef;
}

/* 页脚 */
.footer {
    backdrop-filter: blur(8px);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    margin-top: 3rem;
    padding: 2rem 0;
    font-size: 0.875em;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        margin: 1rem;
        border-radius: 1rem;
        backdrop-filter: blur(4px);
    }
    
    .message-card {
        border-radius: 1rem;
        margin: 0 -1rem 1rem;
    }
    
    .category-badge {
        width: 100%;
        text-align: center;
    }
    
    .header {
        padding: 1.5rem;
    }
    
    h1.display-5 {
        font-size: 2.2rem;
    }
    
    .footer {
        padding: 1.5rem 0;
        font-size: 0.8em;
    }
}

/* 加密容器响应式处理 */
.encrypted-content {
  max-width: 100%;
  overflow: hidden;
}

.encrypted-content .input-group {
  flex-wrap: nowrap; /* 防止移动端换行 */
}

@media (max-width: 576px) {
  .encrypted-content .form-control {
    min-width: 180px; /* 移动端最小宽度 */
  }
}
.message-card {
  position: relative;
  z-index: 1;
}

.encrypted-content {
  z-index: 2;
}

.message-card.active {
  z-index: 3;
  box-shadow: 0 0.5rem 1rem rgba(0,0,0,0.15) !important;
}
.password-input.form-control {
  width: 220px !important;  /* 固定宽度 */
  border-radius: 20px 0 0 20px !important;  /* 左侧圆角 */
  padding: 0.5rem 1.2rem;
  transition: all 0.3s ease;
}

.verify-btn {
  width: 80px !important;  /* 固定按钮宽度 */
  border-radius: 0 20px 20px 0 !important;  /* 右侧圆角 */
  transition: background 0.3s ease;
}

/* 输入组容器约束 */
.encrypted-content .input-group {
  max-width: 300px;  /* 整体宽度限制 */
  margin: 0 auto;     /* 水平居中 */
}

/* 移动端适配 */
@media (max-width: 576px) {
  .password-input.form-control {
    width: 180px !important;
    padding: 0.4rem 1rem;
  }
  
  .verify-btn {
    width: 70px !important;
  }
  
  .encrypted-content .input-group {
    max-width: 250px;
  }
}
.alert.alert-warning.d-flex.align-items-center {
  max-width: 320px;          /* 限制最大宽度 */
  margin: 0 auto 1rem;       /* 居中显示 */
  padding: 0.8rem 1.5rem;    /* 内边距调整 */
  border-radius: 12px;       /* 圆角效果 */
  border: none;              /* 移除默认边框 */
  box-shadow: 0 2px 8px rgba(255, 193, 7, 0.2); /* 柔和阴影 */
  transition: all 0.3s ease; /* 过渡动画 */
}

/* 图标样式 */
.alert-warning .bi-lock {
  font-size: 1.4em;          /* 放大图标 */
  color: #ffc107;            /* 强调色 */
  margin-right: 0.75rem;    /* 间距调整 */
}

/* 文字样式 */
.alert-warning span {
  font-size: 0.95em;
  letter-spacing: 0.3px;
}

/* 悬停效果 */
.alert-warning:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 193, 7, 0.25);
}

/* 移动端适配 */
@media (max-width: 576px) {
  .alert.alert-warning.d-flex.align-items-center {
    max-width: 280px;
    padding: 0.7rem 1.2rem;
  }
  
  .alert-warning .bi-lock {
    font-size: 1.2em;
  }
  
  .alert-warning span {
    font-size: 0.9em;
  }
}
/* 添加昵称输入提示样式 */
#nicheng:required:invalid {
    border-color: #dc3545;
    box-shadow: 0 0 0 0.25rem rgba(220,53,69,.25);
}

#nicheng:required:valid {
    border-color: #198754;
    box-shadow: 0 0 0 0.25rem rgba(25,135,84,.25);
}
/* 换行样式优化 */
.rich-text br:not(.multi-break) {
    content: " ";
    display: block;
    margin-bottom: 0.8em;
}

.rich-text br.multi-break {
    margin-bottom: 1.5em;
    display: block;
    content: "";
}

/* 移动端优化 */
@media (max-width: 768px) {
    .rich-text br {
        margin-bottom: 0.5em;
    }
}
.loading-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* 加载指示器 */
.loading-spinner {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 9999;
}
/* B站播放器安全样式 */
.video-container iframe.bilibili-iframe {
  border: none;
  background: #000;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.bg-light {
  --bs-bg-opacity: 1;
  background-color: unset !important;
}