/**
 * 518.plus 红色主题样式
 * 社区风格设计
 */

:root {
    /* 红色主题色系 - 中国红 */
    --primary-red: #DE2910;
    --primary-red-dark: #b5220c;
    --primary-red-light: #ea503a;
    --primary-red-lighter: #fdedeb;
    
    /* 渐变红色 */
    --gradient-red-start: #DE2910;
    --gradient-red-end: #C8102E;
    
    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-dark: #1a1a1a;
    --bg-red-light: #fff5f5;
    
    /* 文字颜色 */
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    --text-white: #ffffff;
    
    /* 边框颜色 */
    --border-color: #dee2e6;
    --border-red: #dc3545;
    
    /* 阴影 */
    --shadow-sm: 0 2px 4px rgba(220, 53, 69, 0.1);
    --shadow-md: 0 4px 6px rgba(220, 53, 69, 0.15);
    --shadow-lg: 0 10px 20px rgba(220, 53, 69, 0.2);
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* 过渡动画 */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ==================== 全局样式 ==================== */
body {
    background: linear-gradient(135deg, #fff5f5 0%, #ffffff 100%);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* ==================== 导航栏 ==================== */
.navbar-518 {
    background: linear-gradient(135deg, var(--gradient-red-start) 0%, var(--gradient-red-end) 100%);
    box-shadow: var(--shadow-md);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all var(--transition-base);
}

.navbar-518.scrolled {
    box-shadow: var(--shadow-lg);
    padding: 0.75rem 0;
}

.navbar-brand-518 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-white) !important;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: transform var(--transition-base);
}

.navbar-brand-518:hover {
    transform: scale(1.05);
    color: var(--text-white) !important;
}

.navbar-brand-518::before {
    content: "518";
    background: var(--text-white);
    color: var(--primary-red);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-weight: 800;
    margin-right: 0.25rem;
}

.nav-link-518 {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.nav-link-518::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transition: left var(--transition-base);
}

.nav-link-518:hover::before {
    left: 0;
}

.nav-link-518:hover,
.nav-link-518.active {
    color: var(--text-white) !important;
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

/* ==================== 按钮样式 ==================== */
.btn-518 {
    background: linear-gradient(135deg, var(--gradient-red-start) 0%, var(--gradient-red-end) 100%);
    color: var(--text-white);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.btn-518::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-518:hover::before {
    width: 300px;
    height: 300px;
}

.btn-518:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: var(--text-white);
}

.btn-518:active {
    transform: translateY(0);
}

.btn-outline-518 {
    background: transparent;
    color: var(--primary-red);
    border: 2px solid var(--primary-red);
}

.btn-outline-518:hover {
    background: var(--primary-red);
    color: var(--text-white);
}

/* ==================== 卡片样式 ==================== */
.card-518 {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
    overflow: hidden;
    position: relative;
}

.card-518::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--gradient-red-start) 0%, var(--gradient-red-end) 100%);
    transition: width var(--transition-base);
}

.card-518:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-red);
}

.card-518:hover::before {
    width: 6px;
}

.card-header-518 {
    background: linear-gradient(135deg, #fff5f5 0%, #ffffff 100%);
    padding: 1.25rem;
    border-bottom: 2px solid var(--primary-red-lighter);
    font-weight: 600;
    color: var(--primary-red);
}

.card-body-518 {
    padding: 1.5rem;
}

/* ==================== 社区讨论卡片 ==================== */
.discussion-card-518 {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-red);
    transition: all var(--transition-base);
    cursor: pointer;
}

.discussion-card-518:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
    border-left-width: 6px;
}

.discussion-title-518 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.discussion-meta-518 {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.discussion-stats-518 {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.stat-item-518 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.stat-item-518 .icon {
    color: var(--primary-red);
    font-size: 1.1rem;
}

/* ==================== 标签样式 ==================== */
.badge-518 {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    background: var(--primary-red-lighter);
    color: var(--primary-red);
    transition: all var(--transition-base);
}

.badge-518:hover {
    background: var(--primary-red);
    color: var(--text-white);
    transform: scale(1.05);
}

.badge-hot-518 {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%);
    color: var(--text-white);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.8;
    }
}

/* ==================== 输入框样式 ==================== */
.form-control-518 {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    transition: all var(--transition-base);
    background: var(--bg-primary);
}

.form-control-518:focus {
    border-color: var(--primary-red);
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
    outline: none;
}

/* ==================== 加载动画 ==================== */
.loading-518 {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--primary-red-lighter);
    border-top-color: var(--primary-red);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    .navbar-brand-518 {
        font-size: 1.25rem;
    }
    
    .discussion-card-518 {
        padding: 1rem;
    }
    
    .discussion-meta-518 {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .card-body-518 {
        padding: 1rem;
    }
}

/* ==================== 动画效果 ==================== */
.fade-in-518 {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-up-518 {
    animation: slideUp 0.4s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== 滚动条样式 ==================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-red);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-red-dark);
}

/* ==================== 工具类 ==================== */
.text-red-518 {
    color: var(--primary-red) !important;
}

.bg-red-light-518 {
    background: var(--bg-red-light) !important;
}

.border-red-518 {
    border-color: var(--primary-red) !important;
}

.shadow-red-518 {
    box-shadow: var(--shadow-md) !important;
}