/*
 * ===================================================================
 *  Main Stylesheet for Web3 Navigation Portal
 *  Author: YourName
 *  Version: 1.0
 *
 *  STRUCTURE:
 *  1. 全局与通用 (Global & Commons)
 *  2. 头部与页脚 (Header & Footer)
 *  3. 首页专属 (Homepage Specific)
 *  4. 关于页面专属 (About Page Specific)
 *  5. 品牌落地页专属 (Brand Landing Page Specific)
 *  6. 响应式设计 (Responsive Design)
 * ===================================================================
*/


/* --- 1. 全局与通用 (Global & Commons) --- */
:root {
    --bg-color: #141a21;
    --card-color: #1a222c;
    --border-color: #2c3a4a;
    --brand-color: #f0b90b;
    --text-primary: #e6edf3;
    --text-secondary: #8493a6;
    --link-hover-bg: rgba(240, 185, 11, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.7;
}

* { 
    box-sizing: border-box; 
}

a { 
    color: var(--brand-color); 
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: #ffe68a;
}

.container { 
    max-width: 1100px; 
    margin: 0 auto; 
    padding: 0 20px; 
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
}

.section-title h2 {
    font-size: 2.2rem;
    margin: 0 0 10px;
    color: #fff;
}

.section-title p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin: 0;
}

.cta-button {
    display: inline-block;
    background-color: var(--brand-color);
    color: #111;
    padding: 15px 35px;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.cta-button:hover { 
    transform: scale(1.05); 
    background-color: #ffe68a;
	color: #111;
}


/* --- 2. 头部与页脚 (Header & Footer) --- */
.header {
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    background-color: rgba(20, 26, 33, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo { 
    font-size: 1.5rem; 
    font-weight: bold; 
}

.logo a {
    color: var(--text-primary);
}

.logo span { 
    color: var(--brand-color); 
}

.main-nav a { 
    margin-left: 25px; 
    color: var(--text-primary); 
    font-weight: 500; 
}

.main-nav a:hover,
.main-nav a.active { 
    color: var(--brand-color); 
}
.main-nav a.active {
    font-weight: bold;
}

.footer {
    margin-top: 80px;
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer p { 
    margin: 5px 0; 
}


/* --- 3. 首页专属 (Homepage Specific) --- */
.hero { 
    padding: 80px 0; 
    text-align: center; 
}

.hero h1 {
    font-size: 3rem;
    margin: 0 0 20px;
    line-height: 1.2;
    color: #fff;
}

.hero .subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 30px;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 40px;
}

.feature-item { 
    color: var(--text-secondary); 
}

.platform-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.platform-card {
    background-color: var(--card-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.platform-card:hover {
    border-color: var(--brand-color);
    background-color: #1e2732;
}

.platform-logo { 
    flex-shrink: 0; 
}

.platform-logo img { 
    width: 50px; 
    height: 50px; 
    display: block; 
    border-radius: 50%;
} 

.platform-info { 
    flex-grow: 1; 
}

.platform-info h3 { 
    margin: 0; 
    font-size: 1.3rem; 
}

.platform-info .description { 
    color: var(--text-secondary); 
    margin: 5px 0 10px; 
}

.platform-tags .tag {
    display: inline-block;
    background-color: var(--bg-color);
    padding: 4px 10px;
    border-radius: 5px;
    font-size: 0.8rem;
    margin-right: 8px;
    border: 1px solid var(--border-color);
}

.platform-action { 
    flex-shrink: 0; 
}

.platform-action .action-button {
    display: block;
    background-color: var(--brand-color);
    color: #111;
    padding: 12px 25px;
    border-radius: 8px;
    font-weight: bold;
    text-align: center;
    white-space: nowrap;
}

.guides-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.guide-card {
    background-color: var(--card-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.guide-card:hover {
    transform: translateY(-5px);
    border-color: var(--brand-color);
}

.guide-card h3 { 
    margin: 0 0 10px; 
    font-size: 1.2rem; 
}

.guide-card p { 
    margin: 0 0 15px; 
    color: var(--text-secondary); 
}

.guide-card .read-more { 
    font-weight: bold; 
}


/* --- 4. 关于页面专属 (About Page Specific) --- */
.about-page-main {
    padding: 60px 0;
}

.about-header {
    text-align: center;
    margin-bottom: 60px;
}

.about-header h1 {
    font-size: 2.5rem;
    margin: 0 0 15px;
    color: #fff;
}

.about-header .subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.about-intro {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 50px;
    align-items: center;
    margin-bottom: 80px;
}

.intro-text h2 {
    font-size: 2rem;
    margin-top: 0;
    color: #fff;
    border-left: 4px solid var(--brand-color);
    padding-left: 15px;
}

.intro-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.intro-image img {
    border-radius: 12px;
}

.our-mission {
    margin-bottom: 80px;
}

.our-mission h2 {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 40px;
    color: #fff;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.value-card {
    background-color: var(--card-color);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.value-card h3 {
    font-size: 1.3rem;
    margin: 0 0 10px;
    color: var(--text-primary);
}

.value-card p {
    margin: 0;
    color: var(--text-secondary);
}

.call-to-action {
    text-align: center;
    background-color: var(--card-color);
    padding: 50px;
    border-radius: 12px;
}

.call-to-action h2 {
    font-size: 2rem;
    margin: 0 0 15px;
    color: #fff;
}

.call-to-action p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin: 0 auto 30px;
    max-width: 600px;
}


/* --- 5. 品牌落地页专属 (Brand Landing Page Specific) --- */
.landing-page-main {
    padding: 40px 0;
}

.landing-hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 50px;
    padding: 60px 0;
}

.hero-content h1 {
    font-size: 1.8rem;
    line-height: 1.2;
    margin: 0 0 20px;
    color: #fff;
}

.hero-content .subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.hero-content .cta-button.primary {
    font-size: 1.2rem;
    padding: 18px 40px;
}

.hero-content .arrow {
    transition: transform 0.2s ease;
    display: inline-block;
}

.hero-content .cta-button.primary:hover .arrow {
    transform: translateX(5px);
}

.hero-content .cta-note {
    margin-top: 15px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.hero-image img {
    border-radius: 12px;
}

.landing-section {
    padding: 80px 0;
    border-top: 1px solid var(--border-color);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.step-card {
    background-color: var(--card-color);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.step-number {
    width: 50px;
    height: 50px;
    line-height: 50px;
    border-radius: 50%;
    background-color: var(--brand-color);
    color: #111;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 20px;
}

.step-card h3 {
    font-size: 1.3rem;
    margin: 0 0 10px;
}

.step-card p {
    color: var(--text-secondary);
    margin: 0;
}

.landing-section-split {
    padding: 80px 0;
    border-top: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    align-items: center;
    gap: 60px;
}

.split-content h2 {
    font-size: 2.2rem;
    margin: 0 0 20px;
    color: #fff;
}

.split-content p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.split-content ul {
    list-style: none;
    padding: 0;
    margin: 20px 0 30px;
}

.split-content ul li {
    padding-left: 25px;
    position: relative;
    margin-bottom: 10px;
}

.split-content ul li::before {
    content: '✓';
    color: var(--brand-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.split-content .cta-button.secondary {
    background-color: transparent;
    border: 2px solid var(--brand-color);
    color: var(--brand-color);
}

.split-content .cta-button.secondary:hover {
    background-color: var(--link-hover-bg);
}

.faq-container {
    max-width: 800px;
    margin: 40px auto 0;
}

.faq-item {
    background-color: var(--card-color);
    margin-bottom: 10px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.faq-item summary {
    padding: 20px;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    outline: none;
}

.faq-item p {
    padding: 0 20px 20px;
    margin: 0;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}

.faq-item[open] summary {
    color: var(--brand-color);
}


/* --- 6. 响应式设计 (Responsive Design) --- */
@media (max-width: 992px) {
    .guides-grid,
    .values-grid,
    .steps-grid {
        grid-template-columns: 1fr;
    }

    .platform-card,
    .about-intro,
    .landing-hero, 
    .landing-section-split {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .platform-action {
        margin-top: 15px;
    }

    .intro-image {
        order: -1; /* 图片在移动端显示在上方 */
        margin-bottom: 30px;
    }

    .hero-image { 
        order: -1; 
        margin-bottom: 40px; 
    }
}

@media (max-width: 768px) {
    .main-nav { 
        display: none; 
    }

    .hero { 
        padding: 60px 0; 
    }

    .hero h1 { 
        font-size: 2.2rem; 
    }
    
    .hero-features { 
        flex-direction: column; 
        gap: 15px; 
    }

    .section-title h2 { 
        font-size: 1.8rem; 
    }

    .about-header h1 {
        font-size: 2rem;
    }

    .landing-hero h1 { 
        font-size: 2rem; 
    }
}
/*
 * ===================================================================
 *  Styles for NEW Landing Page Content Modules
 * ===================================================================
*/

/* --- "为什么选择" 特性模块 --- */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    margin-top: 50px;
}

.feature-card {
    background-color: var(--card-color);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid transparent; /* 初始边框透明 */
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-color);
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.2rem;
    margin: 0 0 10px;
}

.feature-card p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 0.9rem;
}

/* --- 调整左右分栏模块，增加反向布局 --- */
.landing-section-split.reverse {
    grid-template-columns: 1.2fr 1fr;
}

.landing-section-split.reverse .split-image {
    order: 2;
}

.landing-section-split.reverse .split-content {
    order: 1;
}


/* --- 落地页增强模块的响应式设计 --- */
@media (max-width: 992px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .landing-section-split.reverse {
        grid-template-columns: 1fr;
    }

    .landing-section-split.reverse .split-image {
        order: -1; /* 移动端统一图片在上 */
    }
}

@media (max-width: 768px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }
}
/*
 * ===================================================================
 *  Theme Override for OKX Landing Page (.theme-okx)
 * ===================================================================
*/

/* --- 定义OKX主题色变量 --- */
.theme-okx {
    /* OKX的品牌主色是一种充满科技感的蓝色 */
    --brand-color: #1263ff; 
    --link-hover-bg: rgba(18, 99, 255, 0.1);
}

/* --- 覆盖通用按钮和元素的颜色 --- */
.theme-okx .cta-button,
.theme-okx .platform-action .action-button {
    background-color: var(--brand-color);
    color: #fff; /* 蓝色背景配白色文字更佳 */
}

.theme-okx .cta-button:hover,
.theme-okx .platform-action .action-button:hover {
    background-color: #418aff; /* 蓝色悬浮变亮 */
}

/* --- 覆盖特定组件的品牌色 --- */
.theme-okx .logo span,
.theme-okx .step-number,
.theme-okx .split-content ul li::before,
.theme-okx .faq-item[open] summary,
.theme-okx .main-nav a.active {
    color: var(--brand-color);
}
.theme-okx .step-number {
    background-color: var(--brand-color);
    color: #fff;
}

/* --- 覆盖次要按钮的边框和文字颜色 --- */
.theme-okx .split-content .cta-button.secondary {
    border-color: var(--brand-color);
    color: var(--brand-color);
}
.theme-okx .split-content .cta-button.secondary:hover {
    background-color: var(--link-hover-bg);
}
/*
 * ===================================================================
 *  Styles for Content/Article Pages (e.g., /news/...)
 * ===================================================================
*/

.article-page-main {
    padding: 40px 0;
}

.article-container {
    max-width: 800px; /* 文章内容区宽度适中，易于阅读 */
    margin: 0 auto;
}

.article-header {
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 30px;
    margin-bottom: 30px;
}

.article-header h1 {
    font-size: 2.5rem;
    line-height: 1.3;
    margin: 0 0 15px;
    color: #fff;
}

.article-meta {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.article-content {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.article-content h2 {
    font-size: 1.8rem;
    color: #fff;
    margin: 40px 0 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

.article-content h3 {
    font-size: 1.4rem;
    color: #fff;
    margin: 30px 0 15px;
    padding-left: 15px;
    border-left: 4px solid var(--brand-color);
}

.article-content p {
    margin: 0 0 20px;
}

.article-content ul,
.article-content ol {
    margin: 0 0 20px;
    padding-left: 25px;
}

.article-content li {
    margin-bottom: 10px;
}

.article-content strong {
    color: var(--brand-color);
}

.article-content blockquote {
    margin: 20px 0;
    padding: 20px;
    background-color: var(--card-color);
    border-left: 5px solid var(--brand-color);
    font-style: italic;
    color: var(--text-secondary);
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    margin: 30px 0;
    display: block;
}