/* ===== 基础样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Helvetica Neue', Arial, sans-serif;
}

html {
    font-size: 15px;
}

body {
    background-color: #ffffff;
    color: #000000;
    line-height: 1.6;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ===== 页面布局 ===== */
.classes-section {
    padding: 120px 0 60px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

/* 页面头部 */
.page-header {
    text-align: center;
    margin-bottom: 80px;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 300;
    letter-spacing: 6px;
    margin-bottom: 15px;
    text-transform: uppercase;
}

.subtitle {
    font-size: 1rem;
    color: #666;
    font-weight: 300;
    letter-spacing: 2px;
}

/* 简介部分 */
.intro-section {
    text-align: center;
    margin-bottom: 80px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.intro-text {
    font-size: 1rem;
    line-height: 1.8;
    color: #666;
    letter-spacing: 0.5px;
}

/* 对比部分 */
.comparison-section {
    margin-bottom: 80px;
}

.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    max-width: 800px;
    margin: 0 auto;
}

.comparison-card {
    padding: 40px 30px;
    border: 1px solid #e5e5e5;
    text-align: center;
    transition: all 0.3s ease;
}

.comparison-card:hover {
    border-color: #000;
}

.card-header {
    margin-bottom: 20px;
}

.card-header i {
    font-size: 2.2rem;
    margin-bottom: 15px;
    color: #000;
}

.card-header h3 {
    font-size: 1.3rem;
    font-weight: 400;
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.card-subtitle {
    color: #666;
    font-size: 0.9rem;
    font-weight: 400;
    margin-bottom: 25px;
    letter-spacing: 0.5px;
}

.feature-list {
    text-align: left;
    list-style: none;
}

.feature-list li {
    padding: 6px 0;
    color: #666;
    font-size: 0.9rem;
    position: relative;
    padding-left: 16px;
    letter-spacing: 0.3px;
}

.feature-list li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: #000;
}

/* 特色部分 */
.features-section {
    margin-bottom: 80px;
    text-align: center;
}

.features-section h2 {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: 50px;
    letter-spacing: 2px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
}

.feature-item {
    padding: 25px 20px;
}

.feature-item i {
    font-size: 2rem;
    margin-bottom: 15px;
    color: #000;
}

.feature-item h4 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    font-weight: 400;
    letter-spacing: 1px;
}

.feature-item p {
    color: #666;
    line-height: 1.6;
    font-size: 0.9rem;
    letter-spacing: 0.3px;
}

/* 私教课程 */
.private-section {
    margin-bottom: 60px;
    text-align: center;
}

.private-section h2 {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: 12px;
    letter-spacing: 2px;
}

.section-subtitle {
    color: #666;
    margin-bottom: 50px;
    font-size: 0.9rem;
    letter-spacing: 1px;
}

.private-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    max-width: 800px;
    margin: 0 auto;
}

.private-card {
    padding: 25px 20px;
    border: 1px solid #e5e5e5;
    transition: all 0.3s ease;
}

.private-card:hover {
    border-color: #000;
}

.private-card i {
    font-size: 2rem;
    margin-bottom: 15px;
    color: #000;
}

.private-card h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    font-weight: 400;
    letter-spacing: 1px;
}

.private-card p {
    color: #666;
    line-height: 1.6;
    font-size: 0.9rem;
    letter-spacing: 0.3px;
}

/* 休息信息 */
.rest-section {
    text-align: center;
    padding: 30px;
    border-top: 1px solid #e5e5e5;
}

.rest-section p {
    color: #666;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}

.moon-link {
    color: #000;
    text-decoration: underline;
    transition: all 0.3s ease;
}

.moon-link:hover {
    opacity: 0.7;
}

/* 梵语页面专用样式 */
.private-card .step-number {
    width: 40px;
    height: 40px;
    border: 2px solid #000;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    font-weight: 500;
    background: white;
    font-size: 0.9rem;
}

/* 教师信息全宽布局 */
.features-grid[style*="max-width: 600px"] .feature-item {
    padding: 30px;
}

.features-grid[style*="max-width: 600px"] .feature-item i {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

/* 费用页面专用调整 */
.private-grid {
    display: flex;
    justify-content: center;
    gap: 25px;
    max-width: 1000px;
    margin: 0 auto;
    flex-wrap: wrap;
}

.private-card {
    padding: 25px 20px;
    border: 1px solid #e5e5e5;
    transition: all 0.3s ease;
    text-align: center;
    min-width: 180px;
    flex: 1;
}

.private-card:hover {
    border-color: #000;
}

.private-card i {
    font-size: 2rem;
    margin-bottom: 15px;
    color: #000;
}

.private-card h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    font-weight: 400;
    letter-spacing: 1px;
}

.private-card p {
    color: #666;
    line-height: 1.6;
    font-size: 0.9rem;
    letter-spacing: 0.3px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .private-grid {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .private-card {
        min-width: 250px;
        max-width: 300px;
    }
}

/* 页脚 */
.footer {
    background: #000;
    color: #fff;
    padding: 30px 0;
    text-align: center;
}

.footer-content p {
    font-size: 0.8rem;
    letter-spacing: 0.5px;
    color: #999;
}

/* ===== 导航栏样式 ===== */
.navbar {
    position: fixed;
    top: 20px;
    right: 20px;
    width: auto;
    background: transparent;
    border: none;
    padding: 0;
    z-index: 1000;
}

.nav-container {
    position: relative;
}

.nav-menu {
    position: fixed;
    top: 0;
    right: -300px;
    width: 280px;
    height: 100vh;
    background: #ffffff;
    display: flex;
    flex-direction: column;
    gap: 0;
    padding: 80px 30px 30px;
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
    transition: right 0.3s ease;
    z-index: 999;
}

.nav-menu.active {
    right: 0;
}

.menu-overlay.active {
    display: block;
}

.nav-menu li {
    width: 100%;
    border-bottom: 1px solid #f0f0f0;
}

.nav-menu a {
    display: block;
    padding: 15px 0;
    font-size: 14px;
    width: 100%;
}

.nav-menu a.active {
    font-weight: 500;
}

.hamburger {
    display: block;
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: #ffffff;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    cursor: pointer;
}

.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
    display: none;
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 20px;
        max-width: 100%;
    }
    
    .classes-section {
        padding: 100px 0 40px;
    }
    
    .comparison-grid,
    .features-grid,
    .private-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .page-header h1 {
        font-size: 2rem;
        letter-spacing: 4px;
    }
    
    .comparison-card,
    .feature-item,
    .private-card {
        padding: 25px 20px;
    }
}

/* 亮色主题（默认） */
.light-theme {
    background-color: #ffffff;
    color: #000000;
}

.light-theme .sanskrit {
    color: #000000;
}

.light-theme .transliteration {
    color: #666666;
}

.light-theme .sanskrit-item,
.light-theme .content-item,
.light-theme .vowel-item,
.light-theme .support-item,
.light-theme .consonant-item,
.light-theme .compound-item,
.light-theme .example-item,
.light-theme .weight-item,
.light-theme .sandhi-item {
    border-color: #e5e5e5;
    background: white;
}

/* 暗色主题 */
.dark-theme {
    background-color: #1a1a1a;
    color: #ffffff;
}

.dark-theme .sanskrit {
    color: #ffffff;
}

.dark-theme .transliteration {
    color: #cccccc;
}

.dark-theme .sanskrit-item,
.dark-theme .content-item,
.dark-theme .vowel-item,
.dark-theme .support-item,
.dark-theme .consonant-item,
.dark-theme .compound-item,
.dark-theme .example-item,
.dark-theme .weight-item,
.dark-theme .sandhi-item {
    border-color: #444444;
    background: #2a2a2a;
    color: #ffffff;
}

.dark-theme .nav-menu.left {
    background: #2a2a2a;
    border-color: #444444;
}

.dark-theme .nav-item {
    color: #cccccc;
}

.dark-theme .nav-item:hover,
.dark-theme .nav-item.active {
    background-color: #3a3a3a;
    color: #ffffff;
}

.dark-theme .footer {
    background: #000000;
    color: #ffffff;
}

/* ===== 暗色主题样式 ===== */
.dark-theme {
    background-color: #1a1a1a;
    color: #ffffff;
}

/* 导航栏暗色主题 */
.dark-theme .navbar {
    background-color: #1a1a1a;
}

.dark-theme .nav-menu {
    background: #2a2a2a;
}

.dark-theme .nav-menu a {
    color: #ffffff;
}

.dark-theme .nav-menu a:hover {
    color: #cccccc;
}

.dark-theme .nav-menu a.active {
    color: #ffffff;
    border-color: #ffffff;
}

.dark-theme .hamburger {
    background: #2a2a2a;
    color: #ffffff;
}

/* ===== 基础样式 - 使用CSS变量 ===== */
:root {
    --bg-color: #ffffff;
    --text-color: #000000;
    --border-color: #e5e5e5;
    --card-bg: #ffffff;
    --muted-text: #666666;
    --hover-color: #000000;
}

.dark-theme {
    --bg-color: #1a1a1a;
    --text-color: #ffffff;
    --border-color: #444444;
    --card-bg: #2a2a2a;
    --muted-text: #cccccc;
    --hover-color: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Helvetica Neue', Arial, sans-serif;
}

html {
    font-size: 14px;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ===== 文章布局 ===== */
.article-section {
    padding: 100px 0 60px;
    min-height: 100vh;
    background-color: var(--bg-color);
}

/* 文章头部 */
.article-header {
    text-align: center;
    margin-bottom: 60px;
}

.article-header h1 {
    font-size: 2rem;
    font-weight: 300;
    letter-spacing: 4px;
    margin-bottom: 10px;
    text-transform: uppercase;
    color: var(--text-color);
}

.subtitle {
    font-size: 0.9rem;
    color: var(--muted-text);
    font-weight: 300;
    letter-spacing: 1px;
}

/* 文章内容 */
.article-content {
    max-width: 700px;
    margin: 0 auto;
}

.chapter {
    margin-bottom: 60px;
    scroll-margin-top: 80px;
}

.chapter h2 {
    font-size: 1.3rem;
    font-weight: 300;
    margin-bottom: 15px;
    letter-spacing: 1px;
    color: var(--text-color);
}

.sanskrit-subtitle {
    color: var(--muted-text);
    font-size: 0.8rem;
    margin-bottom: 20px;
    font-style: italic;
    letter-spacing: 0.5px;
}

.article-content p {
    margin-bottom: 15px;
    color: var(--muted-text);
    line-height: 1.6;
    letter-spacing: 0.2px;
    font-size: 0.85rem;
}

/* 梵语文字样式 */
.sanskrit {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-color);
    letter-spacing: 0.5px;
}

.transliteration {
    font-size: 0.8rem;
    color: var(--muted-text);
    font-style: italic;
    margin-left: 0.3rem;
}

/* 网格布局和项样式 */
.sanskrit-item,
.content-item,
.vowel-item,
.support-item,
.consonant-item,
.compound-item,
.example-item,
.weight-item,
.sandhi-item,
.feature-item,
.detail-item {
    padding: 15px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all 0.3s ease;
    font-size: 0.85rem;
    background: var(--card-bg);
    color: var(--text-color);
}

.sanskrit-item:hover,
.content-item:hover,
.vowel-item:hover,
.support-item:hover,
.consonant-item:hover,
.compound-item:hover,
.example-item:hover,
.weight-item:hover,
.sandhi-item:hover,
.feature-item:hover,
.detail-item:hover {
    border-color: var(--hover-color);
}

.content-item h4,
.support-item h4,
.consonant-item h4 {
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 10px;
    letter-spacing: 0.5px;
    color: var(--text-color);
}

/* 左侧章节导航 */
.chapter-nav .nav-menu.left {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
}

.nav-menu.left .nav-item {
    color: var(--muted-text);
}

.nav-menu.left .nav-item:hover,
.nav-menu.left .nav-item.active {
    background-color: var(--bg-color);
    color: var(--text-color);
}

/* 顶部导航栏 */
.navbar .nav-menu.top {
    background: var(--card-bg);
}

.nav-menu a {
    color: var(--text-color);
}

.nav-menu a:hover {
    color: var(--muted-text);
}

.hamburger {
    background: var(--card-bg);
    color: var(--text-color);
}

/* 页脚 */
.footer {
    background: var(--text-color);
    color: var(--bg-color);
}

.footer-content p {
    color: var(--muted-text);
}

/* 按钮 */
.cta-button {
    background: var(--text-color);
    color: var(--bg-color);
    border-color: var(--text-color);
}

.cta-button:hover {
    background: transparent;
    color: var(--text-color);
}

.cta-button.outline {
    background: transparent;
    color: var(--text-color);
    border-color: var(--text-color);
}

.cta-button.outline:hover {
    background: var(--text-color);
    color: var(--bg-color);
}

/* 返回链接 */
.back-link {
    color: var(--muted-text);
}

.back-link:hover {
    color: var(--text-color);
    background-color: var(--card-bg);
}

/* 图标 */
.method-icon,
.benefit-icon,
.feature-item i,
.private-card i,
.comparison-card i {
    color: var(--text-color);
}

/* 分隔线 */
.rest-section,
.back-section {
    border-top-color: var(--border-color);
}

.rest-section p {
    color: var(--muted-text);
}

/* 咒语页面专用样式 */
.mantra-section {
    border: 1px solid var(--border-color);
    background: var(--card-bg);
}

.mantra-section .sanskrit-text p {
    color: var(--text-color);
}

.mantra-section .transliteration-text p {
    color: var(--muted-text);
}

.mantra-item {
    border: 1px solid var(--border-color);
    background: var(--card-bg);
}

/* 瑜伽经页面专用样式 */
.sutra-section:not(:last-child)::after {
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.sutra-number {
    background: var(--text-color);
    color: var(--bg-color);
}

.sutra-title {
    color: var(--text-color);
}

.sutra-content .sanskrit-text p {
    color: var(--text-color);
}

.sutra-content .transliteration-text p {
    color: var(--muted-text);
}

.sutra-content .translation-text p {
    color: var(--muted-text);
}

/* 八支体系页面专用样式 */
.limb-item {
    border: 1px solid var(--border-color);
    background: var(--card-bg);
}

.limb-item h4 {
    color: var(--text-color);
}

.limb-item .sanskrit {
    color: var(--muted-text);
}

.limb-item p {
    color: var(--muted-text);
}

.sutra-reference {
    background: var(--card-bg);
    border-left: 3px solid var(--text-color);
}

.sutra-reference .sanskrit {
    color: var(--text-color);
}

.sutra-reference p {
    color: var(--muted-text);
}