/* 导航栏 */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    font-size: 2rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 2px;
    cursor: pointer;
}
.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
}
.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    cursor: pointer;
}
.nav-links a.active {
    color: var(--primary-color);
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}
.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}
.nav-cta {
    display: flex;
    gap: 1rem;
    align-items: center;
}
.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid var(--primary-color);
    transition: all 0.3s ease;
}
.user-avatar:hover {
    transform: scale(1.1);
    box-shadow: 0 0 20px rgba(0, 204, 128, 0.5);
}
.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 用户菜单容器 */
.user-menu-wrapper {
    position: relative;
}

/* 用户名按钮 - 添加伪元素桥接间隙 */
#user-name-btn {
    position: relative;
}
#user-name-btn::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: 0.5rem;
    background: transparent;
    pointer-events: auto;
}

/* 用户菜单下拉菜单 */
.user-menu-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    width: 360px;
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    margin-top: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    pointer-events: none;
}
.user-menu-wrapper:hover .user-menu-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}
.user-menu-dropdown:hover {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}
.user-menu-header {
    padding: 1.2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: 0.8rem;
}
.user-menu-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 900;
    color: #000;
    flex-shrink: 0;
}
.user-menu-name {
    font-size: 1rem;
    font-weight: 700;
}
.user-menu-list {
    padding: 0.5rem 0;
}
.user-menu-item {
    padding: 0.75rem 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
}
.user-menu-item:hover {
    background: rgba(0, 204, 128, 0.1);
}
.user-menu-item .icon {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}
.user-menu-item .title {
    font-weight: 500;
    font-size: 0.95rem;
}
.user-menu-footer {
    padding: 0.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* ??????????? */
.academic-panel {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 998;
    background: #0a0a0a;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
    overflow: hidden;
}
.academic-panel.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
/* 通过负偏移将嵌入站点自带的顶部导航栏推出可视区域 */
.academic-panel iframe {
    width: 100%;
    height: calc(100% + 65px);
    border: none;
    margin-top: -65px;
    display: block;
}

/* ??????????? */
.dashboard-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 2rem;
    margin-top: 2rem;
}
.sidebar {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 2rem;
    height: fit-content;
    position: sticky;
    top: 120px;
}
.sidebar-menu {
    list-style: none;
}
.sidebar-menu li {
    margin-bottom: 0.5rem;
}
.sidebar-menu a {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 10px;
    transition: all 0.3s ease;
    cursor: pointer;
}
.sidebar-menu a:hover,
.sidebar-menu a.active {
    background: rgba(0, 204, 128, 0.1);
    color: var(--primary-color);
}
.sidebar-menu .icon {
    font-size: 1.2rem;
}
.main-content {
    flex: 1;
}

/* 页脚 */
footer {
    background: #000;
    padding: 3rem 2rem 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
    color: var(--text-secondary);
}
.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1.2rem;
}
.footer-logo-img {
    width: 72px;
    height: auto;
    opacity: 0.9;
}
.footer-logo-text {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 2px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.footer-copy {
    font-size: 0.8rem;
    color: rgba(160, 165, 180, 0.5);
    letter-spacing: 0.02em;
}

/* AI 助手 */
/* 响应式布局 */
@media (max-width: 1024px) {
    .dashboard-layout {
        grid-template-columns: 1fr;
    }
    .sidebar {
        position: static;
    }
}
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .user-menu-dropdown {
        right: -1rem;
        width: 320px;
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* 图表响应式 */
@media (max-width: 900px) {
    div[style*="grid-template-columns: 1fr 1fr"] {
        grid-template-columns: 1fr !important;
    }
}
@media (max-width: 968px) {
    .news-item {
        grid-template-columns: 1fr !important;
    }
    .news-item .news-image {
        order: -1;
    }
}

/* 导航登录/用户按钮区 */
#login-buttons {
    display: flex;
    gap: 1rem;
    align-items: center;
}
#user-menu {
    display: none;
    gap: 1rem;
    align-items: center;
}
/* 用户名按钮 */
#user-name-btn {
    cursor: pointer;
    padding: 0.5rem 1rem;
    color: var(--text-primary);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    transition: all 0.3s;
}
#user-name-btn:hover { color: var(--primary-color); }
#user-name-btn .caret { font-size: 0.8rem; }
/* 用户头像（导航栏内联版） */
#user-avatar-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 700;
    color: #000;
    flex-shrink: 0;
}
/* 用户菜单 Token 区域 */
#user-menu-token {
    padding: 1rem;
    background: rgba(0, 102, 255, 0.05);
    border-radius: 8px;
    margin: 1rem 1rem 0;
    border: 1px solid rgba(0, 102, 255, 0.2);
    display: none;
}
.token-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.token-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
#user-menu-token-display {
    flex: 1;
    background: rgba(0, 0, 0, 0.4);
    padding: 0.5rem 0.7rem;
    border-radius: 5px;
    font-size: 0.7rem;
    color: var(--secondary-color);
    font-family: 'Courier New', monospace;
    word-break: break-all;
    line-height: 1.4;
}
.token-copy-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.3rem;
    color: var(--text-secondary);
    opacity: 0.6;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    flex-shrink: 0;
}
.token-copy-btn:hover {
    opacity: 1;
    color: var(--secondary-color);
}
/* 用户菜单 License Key 区域 */
#user-menu-license-key {
    padding: 1rem;
    background: rgba(0, 204, 128, 0.05);
    border-radius: 8px;
    margin: 1rem;
    border: 1px solid rgba(0, 204, 128, 0.2);
    display: none;
}
.key-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.key-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
#user-menu-key-display {
    flex: 1;
    background: rgba(0, 0, 0, 0.4);
    padding: 0.5rem 0.7rem;
    border-radius: 5px;
    font-size: 0.75rem;
    color: var(--primary-color);
    font-family: 'Courier New', monospace;
    word-break: break-all;
    line-height: 1.4;
}
.key-copy-btn-nav {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.3rem;
    color: var(--text-secondary);
    opacity: 0.6;
    transition: all 0.2s;
    display: flex;
    align-items: center;
}
.key-copy-btn-nav:hover {
    opacity: 1;
    color: var(--primary-color);
}
/* 退出登录按钮 */
.logout-btn {
    width: 100%;
    border-color: var(--danger-color) !important;
    color: var(--danger-color) !important;
    padding: 0.6rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}
.logout-btn:hover {
    background: var(--danger-color) !important;
    color: #fff !important;
}
/* 用户菜单 header 分割线 */
.user-menu-header-border {
    padding: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
/* logo 图片 */
.logo-img { height: 42px; width: auto; }

/* Dashboard License Key 卡片 */
#license-key-card {
    background: linear-gradient(135deg, rgba(0, 204, 128, 0.05), rgba(0, 102, 255, 0.05));
    border: 1px solid rgba(0, 204, 128, 0.2);
    display: none;
}
.card-title-flex {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}
.license-key-body { padding: 1.5rem; }
.license-key-desc {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.8;
}
.license-key-box {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    padding: 1.5rem;
    text-align: center;
}
.license-key-box-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}
#dashboard-license-key {
    font-size: 1.3rem;
    font-weight: 900;
    color: var(--primary-color);
    font-family: 'Courier New', monospace;
    letter-spacing: 2px;
    margin-bottom: 1rem;
    word-break: break-all;
}
.license-key-copy-btn { padding: 0.5rem 1.5rem; }
.license-key-warning {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(255, 170, 0, 0.1);
    border-left: 3px solid var(--warning-color);
    border-radius: 5px;
}
.license-key-warning-title {
    color: var(--warning-color);
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 0.3rem;
}
.license-key-warning-text {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
}

/* Dashboard 表格操作按钮 */
.table-action-btn {
    padding: 0.4rem 0.8rem;
    font-size: 0.9rem;
}
.table-select-btn { padding: 0.5rem 1rem; }

/* Dashboard 搜索栏 */
.dashboard-search-bar {
    display: flex;
    gap: 1rem;
}
.dashboard-search-input {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    color: white;
}

/* 用户菜单 GitHub 认证区域 */
#user-menu-github {
    padding: 1rem;
    background: rgba(36, 41, 46, 0.05);
    border-radius: 8px;
    margin: 1rem;
    border: 1px solid rgba(36, 41, 46, 0.2);
    display: none;
}

.github-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.github-status-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

#github-status {
    flex: 1;
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 0.3rem 0;
}

.github-manage-btn {
    background: rgba(36, 41, 46, 0.3);
    border: 1px solid rgba(36, 41, 46, 0.5);
    color: #fff;
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    font-size: 0.7rem;
    cursor: pointer;
    transition: all 0.2s;
}

.github-manage-btn:hover {
    background: rgba(36, 41, 46, 0.5);
    border-color: rgba(36, 41, 46, 0.7);
}

/* GitHub认证状态样式 */
.github-status.connected {
    color: var(--success-color);
}

.github-status.disconnected {
    color: var(--text-tertiary);
}