/* Anaconda风格 - 财务Python讲师网站样式 */
:root {
    --primary-color: #28A745; /* Anaconda绿色 - 更深更专业 */
    --primary-dark: #218838;
    --secondary-color: #000000;
    --text-dark: #333333;
    --text-light: #666666;
    --text-white: #FFFFFF;
    --bg-white: #FFFFFF;
    --bg-light: #F8F9FA;
    --bg-dark: #1A1A1A;
    --bg-footer: #2C3E50;
    --border-light: #E0E0E0;
    /* 固定顶栏高度（用于给页面内容预留顶部空间） */
    --site-navbar-height: 60px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, 'Microsoft YaHei', '微软雅黑', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 通知栏样式 */
.announcement-bar {
    background: linear-gradient(90deg, #7E57C2 0%, #00A4EF 100%);
    color: white;
}

/* ========== 导航栏 ========== */
.site-navbar {
    padding: 0.5rem 0;
    background-color: var(--bg-white) !important;
    box-shadow: none;
    border-bottom: 1px solid var(--border-light);
    /* 固定顶栏：滚动时保持不动 */
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1030;
    width: 100%;
}

/* 手机端标题两行时，顶栏更高一些 */
@media (max-width: 576px) {
    :root {
        --site-navbar-height: 92px;
    }
}

/* 页面内容整体下移，避免被固定顶栏遮挡 */
.page-container {
    padding-top: var(--site-navbar-height);
}

.site-navbar .container {
    padding-left: 4rem;
    padding-right: 4rem;
}

@media (max-width: 1200px) {
    .site-navbar .container {
        padding-left: 3rem;
        padding-right: 3rem;
    }
}

@media (max-width: 768px) {
    .site-navbar .container {
        padding-left: 2rem;
        padding-right: 2rem;
    }
}

@media (max-width: 576px) {
    .site-navbar .container {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }
}

.site-navbar .navbar-brand {
    font-size: 1.5rem !important;
    font-weight: 700 !important;
    color: var(--text-dark) !important;
    font-family: 'Segoe UI', 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif !important;
    letter-spacing: 1px;
    background: linear-gradient(135deg, #333333 0%, #28A745 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.site-navbar .navbar-brand .brand-stack {
    display: flex;
    flex-direction: column;
    line-height: 1.05;
}

.site-navbar .navbar-brand .brand-cn {
    font-size: 1.5rem;
    font-weight: 700;
}

/* 英文副标题：小字体，确保不被父级“透明填充”影响 */
.site-navbar .navbar-brand .brand-en {
    margin-top: 2px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 1.6px;
    text-transform: uppercase;
    color: rgba(51, 51, 51, 0.75) !important;
    -webkit-text-fill-color: rgba(51, 51, 51, 0.75) !important;
    background: none !important;
    -webkit-background-clip: initial !important;
    background-clip: initial !important;
}

.site-navbar .navbar-brand {
    min-width: 0; /* 允许在窄屏下收缩 */
}

.site-navbar .navbar-brand .brand-stack {
    min-width: 0; /* 允许子项在 flex 下收缩 */
}

/* 手机端：顶部标题一行显示，适应窄屏宽度 */
@media (max-width: 576px) {
    .site-navbar .navbar-brand .brand-stack {
        flex-direction: column; /* 中文上、英文下 */
        align-items: flex-start;
        gap: 0.1rem;
        white-space: normal;
    }

    .site-navbar .navbar-brand {
        max-width: calc(100vw - 78px); /* 预留汉堡按钮空间 */
        overflow: hidden;
    }

    .site-navbar .navbar-brand .brand-cn {
        font-size: 1.15rem;
        white-space: nowrap;
    }

    .site-navbar .navbar-brand .brand-en {
        margin-top: 0;
        font-size: 0.62rem;
        letter-spacing: 1.2px;
        overflow: hidden;
        text-overflow: ellipsis; /* 超窄屏自动省略，仍保持一行 */
        white-space: nowrap;
        max-width: 100%;
    }
}

/* 汉堡按钮样式微调（保持简洁、贴合配色） */
.site-navbar .navbar-toggler {
    border: 1px solid rgba(0, 0, 0, 0.12);
    padding: 0.35rem 0.5rem;
    border-radius: 10px;
}

.site-navbar .navbar-toggler:focus {
    box-shadow: 0 0 0 0.2rem rgba(40, 167, 69, 0.18);
}

.site-navbar .nav-link {
    color: var(--text-dark) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    transition: color 0.3s ease;
}

.site-navbar .nav-link:hover {
    color: var(--primary-color) !important;
}

/* 导航栏：当前选中项高亮 */
.site-navbar .nav-link.active,
.site-navbar .nav-link[aria-current="page"] {
    color: var(--primary-color) !important;
    font-weight: 700;
    background: rgba(40, 167, 69, 0.10);
    border: 1px solid rgba(40, 167, 69, 0.22);
    border-radius: 999px;
}

.site-navbar .nav-link.active:hover,
.site-navbar .nav-link[aria-current="page"]:hover {
    color: var(--primary-dark) !important;
    background: rgba(40, 167, 69, 0.14);
    border-color: rgba(40, 167, 69, 0.30);
}

/* 课程对比表格：课程名称高亮 + 可点击 */
.course-compare-link {
    color: var(--primary-color) !important;
    text-decoration: underline !important;
    background: none !important;
    border: none !important;
    padding: 0 !important;
}

.course-compare-link:hover {
    color: var(--primary-dark) !important;
    text-decoration: underline !important;
}

.btn-nav-primary {
    background-color: var(--primary-color);
    color: var(--text-white);
    border: none;
    padding: 8px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 4px;
    transition: background-color 0.3s ease;
    margin-left: 10px;
}

.btn-nav-primary:hover {
    background-color: var(--primary-dark);
    color: var(--text-white);
}

.btn-nav-link {
    color: var(--text-dark) !important;
    background: none;
    border: none;
    padding: 8px 16px;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
}

.btn-nav-link:hover {
    color: var(--primary-color) !important;
}

/* ========== 次要导航栏 ========== */
.secondary-navbar {
    background-color: #000000;
    width: 100%;
    margin-top: 0; /* 导航栏改为 sticky 后无需预留空间 */
    display: flex;
    align-items: center;
    min-height: 50px;
}

.secondary-navbar .container-fluid {
    display: flex;
    align-items: center;
    min-height: 50px;
}

.secondary-navbar .text-center {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 50px;
    padding: 0;
    line-height: 50px;
}

/* 次级横条：窄屏按“|”换行显示 */
@media (max-width: 576px) {
    .secondary-navbar {
        min-height: auto;
    }

    .secondary-navbar .text-center {
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 0.35rem;
        padding: 10px 0;
        line-height: 1.35;
        text-align: center;
    }

    /* 隐藏中间原始“|”，改为在第一行末尾显示“|” */
    .secondary-navbar .secondary-sep {
        display: none;
    }

    .secondary-navbar .secondary-link-left::after {
        content: " |";
        color: #666;
        margin-left: 0.6rem;
    }
}

/* ========== Hero区域 ========== */
.hero-section {
    background-color: var(--bg-white);
    color: var(--text-dark);
    padding: 100px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* Hero区域科技感装饰 - 网格背景 */
.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(40, 167, 69, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(40, 167, 69, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.5;
    pointer-events: none;
}

/* Hero区域科技感装饰 - 渐变光效 */
.hero-section::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(40, 167, 69, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

/* Hero区域内容容器，确保内容在装饰层之上 */
.hero-section > * {
    position: relative;
    z-index: 1;
}

/* 额外的科技装饰元素 - 使用伪元素在容器内部 */
.hero-section .container::before {
    content: '';
    position: absolute;
    bottom: -100px;
    left: 10%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(40, 167, 69, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}

/* 几何图形装饰 */
.hero-section .container::after {
    content: '';
    position: absolute;
    top: 50px;
    right: 15%;
    width: 150px;
    height: 150px;
    border: 2px solid rgba(40, 167, 69, 0.1);
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    transform: rotate(45deg);
    pointer-events: none;
    z-index: 0;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    color: var(--text-dark);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    color: var(--text-light);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.btn-hero-primary {
    background-color: var(--primary-color);
    color: var(--text-white);
    border: none;
    display: inline-flex;           /* 避免移动端换行时 padding 造成重叠 */
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    padding: 14px 32px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 4px;
    transition: background-color 0.3s ease;
    margin: 0 10px;
}

.btn-hero-primary:hover {
    background-color: var(--primary-dark);
    color: var(--text-white);
}

.btn-hero-secondary {
    background-color: transparent;
    border: 1px solid var(--border-light);
    color: var(--text-dark);
    display: inline-flex;           /* 避免移动端换行时 padding 造成重叠 */
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    padding: 14px 32px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 4px;
    transition: all 0.3s ease;
    margin: 0 10px;
}

/* 课程页底部 CTA：移动端按钮不重叠、自动换行 */
.cta-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}

.cta-actions .btn-hero-primary,
.cta-actions .btn-hero-secondary {
    margin: 0 !important; /* 用 gap 控制间距，避免叠加 */
}

@media (max-width: 576px) {
    .cta-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .cta-actions a {
        width: 100%;
        text-align: center;
    }
}

.btn-hero-secondary:hover {
    background-color: var(--text-dark);
    color: var(--text-white);
    border-color: var(--text-dark);
}

/* ========== 统计数据区域 ========== */
.stats-section {
    background-color: var(--bg-white);
    padding: 80px 0;
}

.stats-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.stats-container {
    position: relative;
}

.stat-item {
    text-align: center;
    padding: 1rem;
    position: relative;
}

.stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 60%;
    background-color: var(--border-light);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    line-height: 1;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ========== 功能卡片 ========== */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-align: center;
    color: var(--text-dark);
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    text-align: center;
    margin-bottom: 3rem;
}

.feature-card {
    padding: 2.5rem;
    background: var(--bg-white);
    border-radius: 8px;
    height: 100%;
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

/* ========== 核心课程区域（黑色背景） ========== */
.core-course-section {
    background-color: #000000;
    color: #FFFFFF;
    padding: 100px 0;
    position: relative;
}

/* ========== 暗色科技感头图（解决方案页顶部专用） ========== */
.dark-hero-section {
    position: relative;
    overflow: hidden;
}

/* 网格背景（更轻微，避免喧宾夺主） */
.dark-hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(40, 167, 69, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(40, 167, 69, 0.06) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.35;
    pointer-events: none;
}

/* 右上光晕 */
.dark-hero-section::after {
    content: '';
    position: absolute;
    top: -45%;
    right: -12%;
    width: 560px;
    height: 560px;
    background: radial-gradient(circle, rgba(40, 167, 69, 0.20) 0%, rgba(40, 167, 69, 0.06) 35%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.dark-hero-section > * {
    position: relative;
    z-index: 1;
}

/* 顶部介绍区域 */
.core-course-intro {
    text-align: center;
    margin-bottom: 80px;
}

.core-course-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: #FFFFFF;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1.5rem;
    text-align: center;
}

.core-course-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #FFFFFF;
    margin-bottom: 1.5rem;
    text-align: center;
}

.core-course-description {
    font-size: 1.1rem;
    color: #FFFFFF;
    line-height: 1.8;
    max-width: 900px;
    margin: 0 auto 2rem;
    text-align: center;
}

.core-course-learn-more {
    display: inline-block;
    background-color: #1A1A1A;
    color: #FFFFFF;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 4px;
    text-decoration: none;
    transition: background-color 0.3s ease;
    margin-top: 1rem;
}

.core-course-learn-more:hover {
    background-color: #2A2A2A;
    color: #FFFFFF;
}

/* 两栏内容区域 */
.core-course-content {
    margin-top: 60px;
}

.core-course-item {
    padding-right: 3rem;
}

.core-course-subtitle {
    font-size: 2rem;
    font-weight: 700;
    color: #FFFFFF;
    margin-bottom: 1.5rem;
}

.core-course-subtext {
    font-size: 1rem;
    color: #FFFFFF;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.core-course-link {
    color: var(--primary-color);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: color 0.3s ease;
}

.core-course-link:hover {
    color: var(--primary-dark);
}

/* 左侧分隔线样式在HTML结构中处理，这里不添加伪元素 */

/* ========== 内容区域 ========== */
.content-section {
    padding: 80px 0;
    background-color: var(--bg-white);
}

.bg-light-section {
    background-color: var(--bg-light);
    padding: 80px 0;
}

/* ========== 页脚 ========== */
.footer {
    background-color: #000000 !important;
    color: var(--text-white);
    padding: 4rem 0 2rem;
}

.footer h5, .footer h6 {
    color: var(--text-white);
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.footer a {
    color: #CCCCCC;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: var(--primary-color);
}

.footer ul {
    list-style: none;
    padding: 0;
}

.footer li {
    margin-bottom: 0.75rem;
}

.footer hr {
    border-color: #444;
    margin: 2rem 0 1rem;
}

/* ========== 按钮样式 ========== */
.btn-custom-green {
    background-color: var(--primary-color);
    color: var(--text-white);
    border: none;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.btn-custom-green:hover {
    background-color: var(--primary-dark);
    color: var(--text-white);
}

.btn-custom-dark {
    background-color: var(--text-dark);
    color: var(--text-white);
    border: none;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.btn-custom-dark:hover {
    background-color: #000;
    color: var(--text-white);
}

/* ========== 响应式设计 ========== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .stat-item:not(:last-child)::after {
        display: none;
    }
}