/* 公共CSS样式文件 - 佰创园科技（上海）有限公司 */

/* CSS变量定义 */
:root {
    --primary-color: #4A90E2;
    --secondary-color: #7B68EE;
    --bs-secondary-color: rgb(152 162 172 / 75%);
    --accent-color: #50C878;
    --text-color: #333;
    --light-gray: #f8f9fa;
    --border-color: #e9ecef;
}

/* 基础样式 */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    background-color: #ffffff;
}

/* 导航栏样式 */
.navbar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-weight: 600;
    color: white !important;
}

.nav-link {
    color: rgba(255,255,255,0.9) !important;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-link:hover {
    color: white !important;
    transform: translateY(-2px);
}

/* 按钮样式 */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    border-radius: 25px;
    padding: 10px 25px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(74, 144, 226, 0.4);
}

/* 卡片样式 */
.card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

/* 页脚样式 */
.footer {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    padding: 40px 0 20px;
}

/* 标题样式 */
.section-title {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 表单样式 */
.form-control {
    border-radius: 10px;
    border: 2px solid var(--border-color);
    padding: 12px 15px;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(74, 144, 226, 0.25);
}

.form-label {
    font-weight: 500;
    color: var(--text-color);
}

/* 输入组样式 */
.input-group-text {
    background: transparent;
    border: 2px solid var(--border-color);
    border-right: none;
    border-radius: 10px 0 0 10px;
}

.input-group .form-control {
    border-left: none;
    border-radius: 0 10px 10px 0;
}

/* 用户头像样式 */
.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
}

/* 侧边栏样式 */
.sidebar {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    padding: 20px 0;
    height: calc(100vh - 140px);
    position: sticky;
    top: 20px;
}

.sidebar .nav-link {
    color: var(--text-color) !important;
    padding: 12px 20px;
    border-radius: 10px;
    margin: 5px 15px;
    transition: all 0.3s ease;
}

.sidebar .nav-link:hover,
.sidebar .nav-link.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    transform: translateX(5px);
}

.sidebar .nav-link i {
    width: 20px;
    margin-right: 10px;
}

/* 主内容区域样式 */
.main-content {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    padding: 30px;
    min-height: calc(100vh - 140px);
}

/* 用户导航样式 */
.user-nav {
    background: white;
    border-bottom: 1px solid var(--border-color);
    padding: 10px 0;
}

/* 产品卡片样式 */
.product-card {
    border: none;
    border-radius: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.product-card .card-body {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-card .card-footer {
    background: none;
    border-top: 1px solid var(--border-color);
    padding-top: 15px;
}

.product-image {
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 48px;
}

.product-tag {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--accent-color);
    color: white;
    padding: 5px 10px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: 500;
}

/* 特性图标样式 */
.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 32px;
    margin: 0 auto 20px;
}

/* 统计区域样式 */
.stats-section {
    background: var(--light-gray);
    padding: 60px 0;
}

.stat-item {
    text-align: center;
    padding: 20px;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* CTA区域样式 */
.cta-section {
    background: linear-gradient(135deg, var(--accent-color), #2ECC71);
    color: white;
    padding: 80px 0;
}

/* 筛选区域样式 */
.filter-section {
    background: var(--light-gray);
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 30px;
}

/* 评分样式 */
.rating {
    color: #ffc107;
}

/* 价格样式 */
.price {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.price.free {
    color: var(--accent-color);
}

/* 登录页面样式 */
.login-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    overflow: hidden;
}

.login-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 40px;
    text-align: center;
}

.login-form {
    padding: 40px;
}

/* 社交登录样式 */
.social-login {
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    margin-top: 20px;
}

.social-btn {
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 10px 20px;
    background: white;
    color: var(--text-color);
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    margin-bottom: 10px;
}

.social-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* 浮动形状动画 */
.floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: -1;
}

.shape {
    position: absolute;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

.shape:nth-child(1) {
    width: 80px;
    height: 80px;
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.shape:nth-child(2) {
    width: 120px;
    height: 120px;
    top: 60%;
    right: 10%;
    animation-delay: 2s;
}

.shape:nth-child(3) {
    width: 60px;
    height: 60px;
    bottom: 20%;
    left: 20%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* 英雄区域样式 */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 100" fill="rgba(255,255,255,0.1)"><polygon points="0,100 1000,0 1000,100"/></svg>');
    background-size: cover;
}

.hero-content {
    position: relative;
    z-index: 2;
}

/* 头像上传样式 */
.avatar-upload {
    position: relative;
    display: inline-block;
}

.avatar-upload input[type=file] {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.avatar-preview {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 48px;
    font-weight: 600;
    margin: 0 auto 20px;
    position: relative;
    overflow: hidden;
}

.avatar-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .section-title {
        font-size: 2rem;
    }
    
    .page-title {
        font-size: 1.5rem;
    }
    
    .hero-section {
        padding: 80px 0 60px;
    }
    
    .sidebar {
        height: auto;
        position: static;
        margin-bottom: 20px;
    }
    
    .main-content {
        min-height: auto;
    }
}