/* ==================== 学霸竞技场 科目PK系统样式 ==================== */

/* 基础变量定义 */
:root {
    /* 主色调 */
    --pk-primary: #4f46e5;
    --pk-primary-hover: #4338ca;
    --pk-primary-light: #a5b4fc;
    --pk-secondary: #7c3aed;
    --pk-secondary-hover: #6d28d9;
    --pk-accent: #06b6d4;
    --pk-accent-hover: #0891b2;
    
    /* 状态色 */
    --pk-success: #10b981;
    --pk-success-light: #6ee7b7;
    --pk-warning: #f59e0b;
    --pk-warning-light: #fcd34d;
    --pk-error: #ef4444;
    --pk-error-light: #fca5a5;
    --pk-info: #3b82f6;
    --pk-info-light: #93c5fd;
    
    /* 背景色 */
    --pk-background: #f8fafc;
    --pk-surface: #ffffff;
    --pk-surface-hover: #f1f5f9;
    --pk-surface-active: #e2e8f0;
    
    /* 文字色 */
    --pk-text: #1e293b;
    --pk-text-secondary: #64748b;
    --pk-text-muted: #94a3b8;
    --pk-text-inverse: #ffffff;
    
    /* 边框色 */
    --pk-border: #e2e8f0;
    --pk-border-hover: #cbd5e1;
    --pk-border-focus: #4f46e5;
    
    /* 阴影 */
    --pk-shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --pk-shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --pk-shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --pk-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --pk-shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* 圆角 */
    --pk-radius-sm: 4px;
    --pk-radius: 6px;
    --pk-radius-md: 8px;
    --pk-radius-lg: 12px;
    --pk-radius-xl: 16px;
    --pk-radius-full: 9999px;
    
    /* 间距 */
    --pk-space-xs: 4px;
    --pk-space-sm: 8px;
    --pk-space: 12px;
    --pk-space-md: 16px;
    --pk-space-lg: 20px;
    --pk-space-xl: 24px;
    --pk-space-2xl: 32px;
    --pk-space-3xl: 48px;
    
    /* 字体大小 */
    --pk-text-xs: 12px;
    --pk-text-sm: 14px;
    --pk-text-base: 16px;
    --pk-text-lg: 18px;
    --pk-text-xl: 20px;
    --pk-text-2xl: 24px;
    --pk-text-3xl: 30px;
    --pk-text-4xl: 36px;
    
    /* 动画时长 */
    --pk-duration-fast: 0.15s;
    --pk-duration: 0.2s;
    --pk-duration-slow: 0.3s;
    --pk-duration-slower: 0.5s;
    
    /* Z-index层级 */
    --pk-z-dropdown: 100;
    --pk-z-sticky: 200;
    --pk-z-fixed: 300;
    --pk-z-modal: 1000;
    --pk-z-popover: 1100;
    --pk-z-tooltip: 1200;
    --pk-z-toast: 1300;
}

/* 暗色主题 */
[data-theme="dark"] {
    --pk-background: #0f172a;
    --pk-surface: #1e293b;
    --pk-surface-hover: #334155;
    --pk-surface-active: #475569;
    --pk-text: #f1f5f9;
    --pk-text-secondary: #cbd5e1;
    --pk-text-muted: #94a3b8;
    --pk-border: #334155;
    --pk-border-hover: #475569;
}

/* ==================== 基础样式重置 ==================== */

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

.pk-system {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--pk-text);
    background: var(--pk-background);
    min-height: 100vh;
}

/* ==================== 布局组件 ==================== */

/* 主容器 */
.pk-container {
    display: flex;
    min-height: 100vh;
    background: var(--pk-background);
}

/* 头部 */
.pk-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: var(--pk-surface);
    border-bottom: 1px solid var(--pk-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--pk-space-lg);
    z-index: var(--pk-z-fixed);
    box-shadow: var(--pk-shadow-sm);
}

.pk-header-left {
    display: flex;
    align-items: center;
    gap: var(--pk-space-md);
}

.pk-header-center {
    flex: 1;
    display: flex;
    justify-content: center;
}

.pk-header-right {
    display: flex;
    align-items: center;
    gap: var(--pk-space-sm);
}

/* Logo */
.pk-logo {
    display: flex;
    align-items: center;
    gap: var(--pk-space-sm);
    font-size: var(--pk-text-xl);
    font-weight: 700;
    color: var(--pk-primary);
    text-decoration: none;
}

.pk-logo-icon {
    font-size: var(--pk-text-2xl);
}

/* 侧边栏 */
.pk-sidebar {
    position: fixed;
    top: 64px;
    left: 0;
    width: 280px;
    height: calc(100vh - 64px);
    background: var(--pk-surface);
    border-right: 1px solid var(--pk-border);
    overflow-y: auto;
    z-index: var(--pk-z-sticky);
    transition: transform var(--pk-duration);
}

.pk-sidebar.collapsed {
    transform: translateX(-100%);
}

.pk-sidebar-content {
    padding: var(--pk-space-lg);
}

/* 主内容区 */
.pk-main {
    flex: 1;
    margin-top: 64px;
    margin-left: 280px;
    padding: var(--pk-space-lg);
    transition: margin-left var(--pk-duration);
}

.pk-sidebar.collapsed + .pk-main {
    margin-left: 0;
}

/* 底部 */
.pk-footer {
    background: var(--pk-surface);
    border-top: 1px solid var(--pk-border);
    padding: var(--pk-space-lg);
    text-align: center;
    color: var(--pk-text-secondary);
    font-size: var(--pk-text-sm);
}

/* ==================== 导航组件 ==================== */

/* 标签导航 */
.pk-tabs {
    display: flex;
    background: var(--pk-surface);
    border-radius: var(--pk-radius-lg);
    padding: var(--pk-space-xs);
    box-shadow: var(--pk-shadow-sm);
}

.pk-tab {
    flex: 1;
    padding: var(--pk-space-sm) var(--pk-space-md);
    border: none;
    background: transparent;
    color: var(--pk-text-secondary);
    font-size: var(--pk-text-sm);
    font-weight: 500;
    border-radius: var(--pk-radius);
    cursor: pointer;
    transition: all var(--pk-duration);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--pk-space-xs);
}

.pk-tab:hover {
    background: var(--pk-surface-hover);
    color: var(--pk-text);
}

.pk-tab.active {
    background: var(--pk-primary);
    color: var(--pk-text-inverse);
    box-shadow: var(--pk-shadow-sm);
}

.pk-tab-icon {
    font-size: var(--pk-text-base);
}

/* 菜单导航 */
.pk-nav {
    list-style: none;
}

.pk-nav-item {
    margin-bottom: var(--pk-space-xs);
}

.pk-nav-link {
    display: flex;
    align-items: center;
    gap: var(--pk-space);
    padding: var(--pk-space) var(--pk-space-md);
    color: var(--pk-text-secondary);
    text-decoration: none;
    border-radius: var(--pk-radius);
    transition: all var(--pk-duration);
    font-size: var(--pk-text-sm);
    font-weight: 500;
}

.pk-nav-link:hover {
    background: var(--pk-surface-hover);
    color: var(--pk-text);
}

.pk-nav-link.active {
    background: var(--pk-primary-light);
    color: var(--pk-primary);
}

.pk-nav-icon {
    font-size: var(--pk-text-base);
    width: 20px;
    text-align: center;
}

.pk-nav-badge {
    margin-left: auto;
    background: var(--pk-error);
    color: var(--pk-text-inverse);
    font-size: var(--pk-text-xs);
    padding: 2px 6px;
    border-radius: var(--pk-radius-full);
    min-width: 18px;
    text-align: center;
}

/* ==================== 按钮组件 ==================== */

.pk-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--pk-space-xs);
    padding: var(--pk-space-sm) var(--pk-space-md);
    border: 1px solid transparent;
    border-radius: var(--pk-radius);
    font-size: var(--pk-text-sm);
    font-weight: 500;
    line-height: 1;
    cursor: pointer;
    transition: all var(--pk-duration);
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
}

.pk-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 按钮尺寸 */
.pk-btn-xs {
    padding: 4px 8px;
    font-size: var(--pk-text-xs);
}

.pk-btn-sm {
    padding: 6px 12px;
    font-size: var(--pk-text-sm);
}

.pk-btn-lg {
    padding: 12px 20px;
    font-size: var(--pk-text-base);
}

.pk-btn-xl {
    padding: 16px 24px;
    font-size: var(--pk-text-lg);
}

/* 按钮变体 */
.pk-btn-primary {
    background: var(--pk-primary);
    color: var(--pk-text-inverse);
    border-color: var(--pk-primary);
}

.pk-btn-primary:hover {
    background: var(--pk-primary-hover);
    border-color: var(--pk-primary-hover);
}

.pk-btn-secondary {
    background: var(--pk-secondary);
    color: var(--pk-text-inverse);
    border-color: var(--pk-secondary);
}

.pk-btn-secondary:hover {
    background: var(--pk-secondary-hover);
    border-color: var(--pk-secondary-hover);
}

.pk-btn-success {
    background: var(--pk-success);
    color: var(--pk-text-inverse);
    border-color: var(--pk-success);
}

.pk-btn-warning {
    background: var(--pk-warning);
    color: var(--pk-text-inverse);
    border-color: var(--pk-warning);
}

.pk-btn-error {
    background: var(--pk-error);
    color: var(--pk-text-inverse);
    border-color: var(--pk-error);
}

.pk-btn-outline {
    background: transparent;
    color: var(--pk-primary);
    border-color: var(--pk-primary);
}

.pk-btn-outline:hover {
    background: var(--pk-primary);
    color: var(--pk-text-inverse);
}

.pk-btn-ghost {
    background: transparent;
    color: var(--pk-text);
    border-color: transparent;
}

.pk-btn-ghost:hover {
    background: var(--pk-surface-hover);
}

/* 按钮图标 */
.pk-btn-icon {
    padding: var(--pk-space-sm);
    width: 36px;
    height: 36px;
}

.pk-btn-icon-sm {
    width: 28px;
    height: 28px;
    padding: 4px;
}

.pk-btn-icon-lg {
    width: 44px;
    height: 44px;
    padding: var(--pk-space);
}

/* ==================== 卡片组件 ==================== */

.pk-card {
    background: var(--pk-surface);
    border: 1px solid var(--pk-border);
    border-radius: var(--pk-radius-lg);
    box-shadow: var(--pk-shadow-sm);
    overflow: hidden;
    transition: all var(--pk-duration);
}

.pk-card:hover {
    box-shadow: var(--pk-shadow-md);
    border-color: var(--pk-border-hover);
}

.pk-card-header {
    padding: var(--pk-space-lg);
    border-bottom: 1px solid var(--pk-border);
}

.pk-card-title {
    font-size: var(--pk-text-lg);
    font-weight: 600;
    color: var(--pk-text);
    margin-bottom: var(--pk-space-xs);
}

.pk-card-subtitle {
    font-size: var(--pk-text-sm);
    color: var(--pk-text-secondary);
}

.pk-card-content {
    padding: var(--pk-space-lg);
}

.pk-card-footer {
    padding: var(--pk-space-lg);
    border-top: 1px solid var(--pk-border);
    background: var(--pk-surface-hover);
}

/* ==================== 表单组件 ==================== */

.pk-form-group {
    margin-bottom: var(--pk-space-md);
}

.pk-label {
    display: block;
    font-size: var(--pk-text-sm);
    font-weight: 500;
    color: var(--pk-text);
    margin-bottom: var(--pk-space-xs);
}

.pk-input {
    width: 100%;
    padding: var(--pk-space-sm) var(--pk-space);
    border: 1px solid var(--pk-border);
    border-radius: var(--pk-radius);
    font-size: var(--pk-text-sm);
    background: var(--pk-surface);
    color: var(--pk-text);
    transition: all var(--pk-duration);
}

.pk-input:focus {
    outline: none;
    border-color: var(--pk-border-focus);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.pk-input::placeholder {
    color: var(--pk-text-muted);
}

.pk-textarea {
    resize: vertical;
    min-height: 80px;
}

.pk-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 8px center;
    background-repeat: no-repeat;
    background-size: 16px;
    padding-right: 32px;
}

/* ==================== 状态组件 ==================== */

/* 徽章 */
.pk-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    font-size: var(--pk-text-xs);
    font-weight: 500;
    border-radius: var(--pk-radius-full);
    white-space: nowrap;
}

.pk-badge-primary {
    background: var(--pk-primary-light);
    color: var(--pk-primary);
}

.pk-badge-success {
    background: var(--pk-success-light);
    color: var(--pk-success);
}

.pk-badge-warning {
    background: var(--pk-warning-light);
    color: var(--pk-warning);
}

.pk-badge-error {
    background: var(--pk-error-light);
    color: var(--pk-error);
}

/* 进度条 */
.pk-progress {
    width: 100%;
    height: 8px;
    background: var(--pk-border);
    border-radius: var(--pk-radius-full);
    overflow: hidden;
}

.pk-progress-bar {
    height: 100%;
    background: var(--pk-primary);
    border-radius: var(--pk-radius-full);
    transition: width var(--pk-duration-slow);
}

/* 加载器 */
.pk-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--pk-border);
    border-top: 2px solid var(--pk-primary);
    border-radius: 50%;
    animation: pk-spin 1s linear infinite;
}

@keyframes pk-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ==================== 响应式设计 ==================== */

@media (max-width: 1024px) {
    .pk-sidebar {
        transform: translateX(-100%);
    }
    
    .pk-main {
        margin-left: 0;
    }
    
    .pk-sidebar.show {
        transform: translateX(0);
    }
}

@media (max-width: 768px) {
    .pk-header {
        padding: 0 var(--pk-space-md);
    }
    
    .pk-main {
        padding: var(--pk-space-md);
    }
    
    .pk-tabs {
        flex-direction: column;
    }
    
    .pk-card-header,
    .pk-card-content,
    .pk-card-footer {
        padding: var(--pk-space-md);
    }
}

@media (max-width: 480px) {
    .pk-header {
        height: 56px;
        padding: 0 var(--pk-space);
    }
    
    .pk-sidebar {
        top: 56px;
        height: calc(100vh - 56px);
    }
    
    .pk-main {
        margin-top: 56px;
        padding: var(--pk-space);
    }
    
    .pk-btn {
        padding: var(--pk-space-xs) var(--pk-space-sm);
        font-size: var(--pk-text-xs);
    }
}

/* ==================== 动画效果 ==================== */

/* 淡入动画 */
@keyframes pk-fade-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.pk-fade-in {
    animation: pk-fade-in var(--pk-duration-slow) ease-out;
}

/* 滑入动画 */
@keyframes pk-slide-in-left {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.pk-slide-in-left {
    animation: pk-slide-in-left var(--pk-duration-slow) ease-out;
}

/* 缩放动画 */
@keyframes pk-scale-in {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.pk-scale-in {
    animation: pk-scale-in var(--pk-duration) ease-out;
}

/* 脉冲动画 */
@keyframes pk-pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.pk-pulse {
    animation: pk-pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* ==================== 工具类 ==================== */

/* 文本对齐 */
.pk-text-left { text-align: left; }
.pk-text-center { text-align: center; }
.pk-text-right { text-align: right; }

/* 文本颜色 */
.pk-text-primary { color: var(--pk-primary); }
.pk-text-secondary { color: var(--pk-text-secondary); }
.pk-text-muted { color: var(--pk-text-muted); }
.pk-text-success { color: var(--pk-success); }
.pk-text-warning { color: var(--pk-warning); }
.pk-text-error { color: var(--pk-error); }

/* 背景颜色 */
.pk-bg-primary { background-color: var(--pk-primary); }
.pk-bg-surface { background-color: var(--pk-surface); }
.pk-bg-success { background-color: var(--pk-success); }
.pk-bg-warning { background-color: var(--pk-warning); }
.pk-bg-error { background-color: var(--pk-error); }

/* 间距 */
.pk-m-0 { margin: 0; }
.pk-m-1 { margin: var(--pk-space-xs); }
.pk-m-2 { margin: var(--pk-space-sm); }
.pk-m-3 { margin: var(--pk-space); }
.pk-m-4 { margin: var(--pk-space-md); }
.pk-m-5 { margin: var(--pk-space-lg); }

.pk-p-0 { padding: 0; }
.pk-p-1 { padding: var(--pk-space-xs); }
.pk-p-2 { padding: var(--pk-space-sm); }
.pk-p-3 { padding: var(--pk-space); }
.pk-p-4 { padding: var(--pk-space-md); }
.pk-p-5 { padding: var(--pk-space-lg); }

/* 显示/隐藏 */
.pk-hidden { display: none !important; }
.pk-visible { display: block !important; }

/* 弹性布局 */
.pk-flex { display: flex; }
.pk-flex-col { flex-direction: column; }
.pk-flex-wrap { flex-wrap: wrap; }
.pk-items-center { align-items: center; }
.pk-justify-center { justify-content: center; }
.pk-justify-between { justify-content: space-between; }
.pk-flex-1 { flex: 1; }

/* 网格布局 */
.pk-grid { display: grid; }
.pk-grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.pk-grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.pk-grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.pk-grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.pk-gap-1 { gap: var(--pk-space-xs); }
.pk-gap-2 { gap: var(--pk-space-sm); }
.pk-gap-3 { gap: var(--pk-space); }
.pk-gap-4 { gap: var(--pk-space-md); }
.pk-gap-5 { gap: var(--pk-space-lg); }

/* 圆角 */
.pk-rounded { border-radius: var(--pk-radius); }
.pk-rounded-lg { border-radius: var(--pk-radius-lg); }
.pk-rounded-full { border-radius: var(--pk-radius-full); }

/* 阴影 */
.pk-shadow { box-shadow: var(--pk-shadow-sm); }
.pk-shadow-md { box-shadow: var(--pk-shadow-md); }
.pk-shadow-lg { box-shadow: var(--pk-shadow-lg); }

/* 过渡效果 */
.pk-transition { transition: all var(--pk-duration); }
.pk-transition-fast { transition: all var(--pk-duration-fast); }
.pk-transition-slow { transition: all var(--pk-duration-slow); }

/* ==================== 时间轴组件 ==================== */

.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--pk-primary), var(--pk-success), var(--pk-warning));
}

.timeline-item {
    position: relative;
    margin-bottom: var(--pk-space-lg);
}

.timeline-marker {
    position: absolute;
    left: -22px;
    top: 5px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid var(--pk-surface);
    box-shadow: var(--pk-shadow-sm);
}

.timeline-content {
    background: rgba(255, 255, 255, 0.05);
    padding: var(--pk-space-sm) var(--pk-space-md);
    border-radius: var(--pk-radius);
    border-left: 3px solid var(--pk-primary);
    backdrop-filter: blur(10px);
}

/* ==================== 增强卡片样式 ==================== */

.bg-light-success {
    background: linear-gradient(135deg, rgba(40, 167, 69, 0.15) 0%, rgba(25, 135, 84, 0.15) 100%);
    border: 1px solid rgba(40, 167, 69, 0.3);
    color: white !important;
}

.bg-light-warning {
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.15) 0%, rgba(255, 143, 0, 0.15) 100%);
    border: 1px solid rgba(255, 193, 7, 0.3);
    color: white !important;
}

.bg-light-primary {
    background: linear-gradient(135deg, rgba(13, 110, 253, 0.15) 0%, rgba(0, 123, 255, 0.15) 100%);
    border: 1px solid rgba(13, 110, 253, 0.3);
    color: white !important;
}

.bg-light-info {
    background: linear-gradient(135deg, rgba(13, 202, 240, 0.15) 0%, rgba(32, 201, 151, 0.15) 100%);
    border: 1px solid rgba(13, 202, 240, 0.3);
    color: white !important;
}

.bg-light-danger {
    background: linear-gradient(135deg, rgba(220, 53, 69, 0.15) 0%, rgba(214, 51, 132, 0.15) 100%);
    border: 1px solid rgba(220, 53, 69, 0.3);
    color: white !important;
}

/* 确保卡片内的所有文字都是白色 */
.bg-light-success *,
.bg-light-warning *,
.bg-light-primary *,
.bg-light-info * {
    color: white !important;
}

/* 列表组样式优化 */
.list-group-item.bg-transparent {
    color: white !important;
}

.list-group-item.bg-transparent * {
    color: white !important;
}

/* ==================== 手风琴组件优化 ==================== */

.accordion-button {
    background-color: rgba(255, 255, 255, 0.05);
    color: white !important;
    border: 1px solid var(--pk-border);
    backdrop-filter: blur(10px);
    transition: all var(--pk-duration);
}

.accordion-button:not(.collapsed) {
    background-color: rgba(0, 123, 255, 0.15);
    color: white !important;
    box-shadow: none;
    border-color: var(--pk-primary);
}

.accordion-button:focus {
    box-shadow: 0 0 0 0.25rem rgba(0, 123, 255, 0.25);
    border-color: var(--pk-primary);
    color: white !important;
}

.accordion-button:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: white !important;
}

.accordion-item {
    background-color: transparent;
    border: 1px solid var(--pk-border);
    margin-bottom: var(--pk-space-xs);
    border-radius: var(--pk-radius);
    overflow: hidden;
}

.accordion-body {
    background-color: rgba(255, 255, 255, 0.02);
    color: white !important;
    border-top: 1px solid var(--pk-border);
}

/* 确保手风琴内的所有文字都是白色 */
.accordion-button *,
.accordion-body * {
    color: white !important;
}

/* ==================== 友谊主题增强 ==================== */

.friendship-highlight {
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.1), rgba(78, 205, 196, 0.1));
    border: 1px solid rgba(255, 107, 107, 0.2);
    border-radius: var(--pk-radius);
    padding: var(--pk-space-md);
    margin: var(--pk-space-sm) 0;
}

.friendship-icon {
    color: var(--pk-accent);
    animation: heartbeat 2s ease-in-out infinite;
}

@keyframes heartbeat {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}