/* css/style_purple.css - Future Purple (未来紫) */

/* =========================================
   1. 核心变量 (紫色系)
   ========================================= */
:root {
    --primary-color: #6f42c1;       /* 核心紫 (Bootstrap Indigo) */
    --primary-dark: #563d7c;        /* 深紫 (悬停态) */
    --primary-light: #e0cffc;       /* 浅紫 (背景点缀) */
    
    --text-main: #2d2a32;           /* 深灰紫 (比纯黑柔和) */
    --text-light: #6c757d;          /* 辅助灰 */
    
    --bg-body: #fbfbfe;             /* 极淡的紫白背景 */
    --bg-light: #f3f0ff;            /* 浅淡紫色背景块 */
    
    --border-color: #dee2e6;
    
    --font-stack: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    --transition-base: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

body {
    font-family: var(--font-stack);
    color: var(--text-main);
    background-color: var(--bg-body);
    -webkit-font-smoothing: antialiased;
    line-height: 1.6;
}

a { text-decoration: none; transition: var(--transition-base); }

/* =========================================
   2. 导航栏 (深紫磨砂)
   ========================================= */
.navbar {
    background-color: rgba(45, 10, 90, 0.9) !important; /* 深邃紫 */
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 20px rgba(111, 66, 193, 0.2); /* 紫色光晕投影 */
    padding: 0.8rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.nav-link {
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85) !important;
    position: relative;
    padding: 0.5rem 1rem;
}

.nav-link:hover, .nav-link.active {
    color: #ffffff !important;
    text-shadow: 0 0 10px rgba(160, 100, 255, 0.5); /* 文字发光 */
}

/* 导航下划线 */
.nav-link::after {
    content: ''; position: absolute; bottom: 0; left: 50%; width: 0; height: 3px;
    background-color: #a370f7; /* 亮紫色线条 */
    transition: var(--transition-base); transform: translateX(-50%);
    box-shadow: 0 0 8px #a370f7;
}
.nav-link:hover::after, .nav-link.active::after { width: 60%; }

/* =========================================
   3. 卡片与通用组件
   ========================================= */
.card {
    border: none;
    background: #fff;
    border-radius: 12px; /* 更圆润 */
    box-shadow: 0 5px 15px rgba(45, 10, 90, 0.03);
    transition: var(--transition-base);
}

.card:hover {
    transform: translateY(-6px);
    /* 悬停时出现紫色投影 */
    box-shadow: 0 15px 35px rgba(111, 66, 193, 0.15); 
}

.card-img-top-wrapper { overflow: hidden; }
.card img { transition: transform 0.6s ease; }
.card:hover img { transform: scale(1.06); }

.card-title a { color: var(--text-main); font-weight: 700; transition: color 0.2s; }
.card-title a:hover { color: var(--primary-color); }

.bg-light { background-color: var(--bg-light) !important; }
.text-primary { color: var(--primary-color) !important; }

/* =========================================
   4. 按钮 (渐变紫)
   ========================================= */
.btn {
    border-radius: 50px; /* 胶囊按钮 */
    font-weight: 600; padding: 0.6rem 1.6rem; border: none;
    transition: var(--transition-base);
}

.btn-primary {
    /* 渐变背景 */
    background: linear-gradient(135deg, #6f42c1, #512da8);
    box-shadow: 0 4px 10px rgba(111, 66, 193, 0.3);
    color: #fff;
}
.btn-primary:hover {
    background: linear-gradient(135deg, #7e57c2, #5e35b1);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(111, 66, 193, 0.4);
}

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}
.btn-outline-primary:hover {
    background-color: var(--primary-color);
    color: #fff;
    box-shadow: 0 4px 10px rgba(111, 66, 193, 0.2);
}

/* 表单聚焦 */
.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(111, 66, 193, 0.15);
}

/* =========================================
   5. 侧边栏与列表
   ========================================= */
.list-group-item {
    border: none; border-bottom: 1px solid rgba(0,0,0,0.05);
    color: var(--text-main); transition: var(--transition-base);
}
.list-group-item:hover {
    background-color: var(--bg-light);
    color: var(--primary-color);
    padding-left: 1.25rem;
}
/* 选中状态：紫底白字 */
.list-group-item.active {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    color: #ffffff !important;
    box-shadow: 0 4px 12px rgba(111, 66, 193, 0.3);
}
/* 产品页侧边栏特殊处理 */
#product-cat-list .list-group-item:hover { padding-left: 0; }

/* =========================================
   6. 详情页专项 (Tab & Breadcrumb)
   ========================================= */
.breadcrumb-item a { color: var(--text-light); }
.breadcrumb-item a:hover { color: var(--primary-color); }

/* Tab 选项卡 */
.nav-tabs { border-bottom: 1px solid var(--border-color); }
.nav-tabs .nav-link {
    color: var(--text-light); border: none; font-weight: 500;
    padding: 1rem 1.5rem; transition: all 0.2s;
}
.nav-tabs .nav-link:hover {
    color: var(--primary-color); background-color: var(--bg-light);
}
/* 选中状态：顶部紫线 */
.nav-tabs .nav-link.active {
    color: var(--primary-color) !important;
    background-color: #fff !important;
    border-bottom: 2px solid #fff;
    border-top: 3px solid var(--primary-color) !important;
    font-weight: bold;
}

/* =========================================
   7. 底部 Footer
   ========================================= */
footer {
    background-color: #120821 !important; /* 极深的紫黑色 */
    color: #b0a4c5; /* 浅紫灰 */
    font-size: 0.9rem;
}
footer h5 {
    color: #fff; font-weight: 600; margin-bottom: 1.2rem;
    padding-bottom: 10px; border-bottom: 2px solid var(--primary-color);
    display: inline-block;
}
footer a { color: #b0a4c5; }
footer a:hover { color: #fff; text-decoration: none; padding-left: 5px; }
footer .bi:hover { color: #a370f7; transform: scale(1.1); }