:root {
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --accent-color: #4cc9f0;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --success-color: #4ade80;
    --warning-color: #facc15;
    --danger-color: #f87171;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --transition-all: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    color: var(--gray-700);
    line-height: 1.6;
}

/* 头部导航栏美化 (优化后的样式) */
.layui-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
}

.navbar-item {
    color: var(--gray-700);
    transition: var(--transition-all);
    font-weight: 500;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
}

.navbar-item:hover {
    color: var(--primary-color);
    background-color: rgba(67, 97, 238, 0.1);
    transform: translateY(-2px);
}

.navbar-item.layui-font-deep-blue {
    color: var(--primary-color);
    background-color: rgba(67, 97, 238, 0.1);
}

/* 搜索框美化 (优化后的样式) */
.searchFormDiv .search-input {
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 50px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-all);
    display: flex;
    align-items: center;
    padding: 0.25rem 1rem;
}

.searchFormDiv .search-input:hover {
    background: rgba(255, 255, 255, 1);
    border: 1px solid rgba(0, 0, 0, 0.2);
    box-shadow: var(--shadow-md);
}

.searchFormDiv .search-input input {
    color: var(--gray-800);
    background: transparent;
    border: none;
    outline: none;
    flex: 1;
    padding: 0.5rem 0;
}

.searchFormDiv .search-input input::placeholder {
    color: var(--gray-500);
}

.searchFormDiv .search-input img {
    width: 1.25rem;
    height: 1.25rem;
    opacity: 0.7;
}

/* 响应式菜单按钮美化 */
.layui-icon-shrink-right {
    color: var(--gray-700);
    font-size: 20px;
}

/* 用户信息区域美化 */
.user-info .user-name {
    color: var(--gray-800);
    font-weight: 500;
}

.user-info .layui-icon-triangle-d {
    color: var(--gray-700);
}

.avatar-a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar {
    border-radius: 50%;
    transition: var(--transition-all);
}

.avatar:hover {
    transform: scale(1.05);
}

/* 移动端菜单美化 (优化后的样式) */
.header-more-container {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 1rem;
    border-radius: 0 0 1rem 1rem;
}

.header-more-container .layui-btn {
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 0.5rem;
    margin-bottom: 0.5rem;
    transition: var(--transition-all);
}

.header-more-container .layui-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

/* Logo美化 */
.navbar-item .logo {
    height: 2.5rem;
    transition: var(--transition-all);
}

.navbar-item .logo:hover {
    filter: drop-shadow(0 0 1em var(--accent-color));
    transform: scale(1.05);
}

/* 分类容器美化 */
.category-container {
    background: rgba(255, 255, 255, 0.7);
    border-radius: 1rem;
    margin: 1rem;
    padding: 1rem;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

.layui-btn-container .layui-btn {
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
    border-radius: 2rem;
    border: none;
    transition: var(--transition-all);
}

.layui-btn-container .layui-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.layui-btn-container .layui-bg-deep-blue {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

/* 主要内容区域美化 */
.home-container {
    margin-top: 1.5rem;
}

.left-container {
    margin-top: 20px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    padding: 1.5rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

/* 话题过滤器美化 */
.left-container .topic-filter {
    background: rgba(255, 255, 255, 0.7);
    border-radius: 0.75rem;
    padding: 1rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.left-container .topic-filter .layui-text {
    color: var(--gray-700);
    transition: var(--transition-all);
    border-radius: 2rem;
    cursor: pointer;
    text-align: center;
}

.left-container .topic-filter .layui-text:hover {
    background: rgba(67, 97, 238, 0.1);
    color: var(--primary-color);
}

.left-container .topic-filter .layui-text.layui-font-deep-blue {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: #fff !important;
}

/* 话题列表项美化 */
.left-container .topic-item {
    border: none;
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: var(--transition-all);
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
}

/*.left-container .topic-item:hover {*/
/*    transform: translateY(-3px);*/
/*    box-shadow: var(--shadow-lg);*/
/*    background: rgba(255, 255, 255, 1);*/
/*}*/

.left-container .topic-item .title {
    color: var(--gray-900);
    font-weight: 700;
    transition: var(--transition-all);
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    display: block;
}

.left-container .topic-item .title:hover {
    color: var(--primary-color);
}

.topic-item-main .layui-btn {
    margin-right: 0.25rem;
    margin-bottom: 0.25rem;
}

.topic-item-main .layui-btn-xs {
    border-radius: 0.25rem;
}

/* 话题统计信息美化 */
.topic-item .layui-row {
    margin-top: 1rem;
}

.topic-item .layui-row .layui-col-xs5 {
    display: flex;
    align-items: center;
}

.topic-item .layui-row .layui-col-xs7 {
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

.topic-item .layui-icon {
    color: var(--gray-500);
}

.topic-item .layui-badge {
    background: rgba(67, 97, 238, 0.1);
    color: var(--primary-color);
    border-radius: 0.5rem;
    border: none;
}

.avatar-stack {
    display: flex;
    margin-left: 1rem;
}

.avatar-stack .avatar {
    width: 1.5rem;
    height: 1.5rem;
    border: 2px solid white;
}

.avatar-stack .avatar:not(:first-child) {
    margin-left: -0.5rem;
}

/* 右侧容器美化 */
.right-container .right-item {
    background: rgba(255, 255, 255, 0.8);
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    padding: 0.5rem;
    margin-bottom: 1.5rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.right-container .title {
    color: var(--gray-800);
    font-weight: 700;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--gray-200);
}

/* 按钮美化 */
.layui-btn {
    border-radius: 0.5rem;
    border: none;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-all);
    font-weight: 500;
}

.layui-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.layui-btn.layui-bg-deep-blue {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.layui-btn.layui-bg-gray {
    background: var(--gray-200);
    color: var(--gray-700) !important;
}

/* 分页美化 */
.page {
    margin-top: 1.5rem;
    text-align: center;
}

.page .layui-laypage a, .page .layui-laypage span {
    border-radius: 0.5rem;
    margin: 0 0.25rem;
    border: none;
    background: rgba(255, 255, 255, 0.7);
}

.page .layui-laypage a:hover {
    background: var(--primary-color);
    color: white;
}

.page .layui-laypage .layui-laypage-curr .layui-laypage-em {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 0.5rem;
}

.page .layui-laypage .layui-laypage-curr em {
    color: white;
}

/* 响应式改进 */
@media screen and (max-width: 768px) {
    .category-container {
        margin: 0.75rem 0;
        padding: 0.75rem;
    }

    .left-container {
        padding: 1rem;
    }

    .left-container .topic-item {
        padding: 1rem;
    }

    .right-container .right-item {
        padding: 1rem;
        margin-bottom: 1rem;
    }

    .navbar {
        padding: 0.5rem;
    }

    .navbar-item {
        padding: 0.25rem 0.5rem;
    }

    .left-container .topic-filter {
        padding: 0.75rem;
    }

    .topic-item-main .layui-row {
        flex-direction: column;
        gap: 1rem;
    }

    .topic-item-main .layui-col-xs5, .topic-item-main .layui-col-xs7 {
        width: 100%;
        justify-content: space-between;
    }

    padding: 15px;
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}