/* ========================================
   收款码推广平台 - 全局样式表
   设计风格: Apple 苹果官网风格
   配色方案: 简洁黑白灰 + Apple Blue
======================================== */

/* 字体导入 - 使用系统字体栈 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* CSS变量定义 - Apple风格配色 */
:root {
    /* 主题色 - Apple Blue */
    --color-primary: #0071E3;
    --color-primary-dark: #0077ED;
    --color-secondary: #86868b;
    --color-cta: #0071E3;
    --color-cta-hover: #0077ED;
    
    /* 背景色 - 黑白灰 */
    --color-bg-dark: #ffffff;
    --color-bg-card: #f5f5f7;
    --color-bg-card-hover: #f0f0f0;
    --color-bg-dark-section: #000000;
    
    /* 文字色 */
    --color-text: #1d1d1f;
    --color-text-muted: #86868b;
    --color-text-light: #f5f5f7;
    
    /* 边框色 */
    --color-border: #d2d2d7;
    --color-border-light: #e8e8ed;
    
    /* 功能色 */
    --color-success: #34c759;
    --color-danger: #ff3b30;
    --color-warning: #ff9500;
    
    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* 圆角 - Apple风格小圆角 */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.25rem;
    
    /* 阴影 - Apple风格微妙阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.16);
    
    /* 过渡 */
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* 宽度 */
    --max-width: 1200px;
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg-dark: #000000;
        --color-bg-card: #1d1d1f;
        --color-bg-card-hover: #2d2d2f;
        --color-text: #f5f5f7;
        --color-text-muted: #86868b;
        --color-border: #424245;
        --color-border-light: #2d2d2f;
    }
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'SF Pro Display', sans-serif;
    font-size: 16px;
    line-height: 1.5;
    color: var(--color-text);
    background-color: #f2f0ec;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 网站容器 */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0px auto 0; /* 这里修改了：顶部距离 50px */
    padding: 0 var(--spacing-lg);
}

/* 高分辨率适配 */
@media (min-width: 1920px) {
    :root {
        --max-width: 1440px;
    }
}

@media (min-width: 2560px) {
    :root {
        --max-width: 1600px;
    }
}

/* ========================================
   顶部栏
======================================== */
.top-bar {
    background-color: #000000;
    border-bottom: 1px solid #333333;
    padding: var(--spacing-sm) 0;
    width: 100%;
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.top-bar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.top-bar-brand svg {
    width: 18px;
    height: 18px;
    color: #ffffff;
    opacity: 0.8;
}

.top-bar-brand span {
    font-size: 0.75rem;
    color: #ffffff;
    letter-spacing: -0.01em;
    opacity: 0.8;
}

.top-bar-contact {
    font-size: 0.75rem;
    color: #ffffff;
}

.top-bar-contact strong {
    color: #ffffff;
    font-weight: 600;
}

/* ========================================
   导航栏
======================================== */
.navbar {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(0, 50, 150, 0.5);
    padding: var(--spacing-md) 0;
    position: static;
    max-width: 100%;
}

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

.navbar-logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.navbar-logo svg {
    width: 28px;
    height: 28px;
    color: var(--color-primary);
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    list-style: none;
}

.navbar-nav a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 400;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
    padding: var(--spacing-sm) 0;
}

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

.navbar-cta {
    background: var(--color-primary) !important;
    color: white !important;
    padding: var(--spacing-sm) var(--spacing-lg) !important;
    border-radius: var(--radius-lg);
    font-weight: 500 !important;
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.navbar-cta:hover {
    background: var(--color-primary-dark) !important;
    transform: scale(1.02);
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text);
    cursor: pointer;
    padding: var(--spacing-sm);
}

.menu-toggle svg {
    width: 24px;
    height: 24px;
}

/* ========================================
   Banner区
======================================== */
.banner {
    position: relative;
    max-width: 1200px;
    margin: 20px auto 0;
    border-radius: 1rem;
    overflow: hidden;
    min-height: 380px;
    display: flex;
    align-items: center;
}

.banner-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.banner-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.banner-content {
    position: relative;
    z-index: 1;
    padding: 3rem 4rem;
    max-width: 600px;
}

.banner-title {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.banner-title .highlight {
    color: #fab909;
}

.banner-subtitle {
    font-size: 1.25rem;
    color: #fff;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.banner-features {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.banner-features span {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.875rem;
}

.banner-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: #0071E3;
    color: #fff;
    font-size: 1rem;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border-radius: 2rem;
    text-decoration: none;
    transition: background 0.2s ease;
}

.banner-btn:hover {
    background: #0077ED;
}

@media (max-width: 768px) {
    .banner {
        min-height: 320px;
    }
    
    .banner-content {
        padding: 2rem;
        max-width: 100%;
    }
    
    .banner-title {
        font-size: 1.5rem;
    }
    
    .banner-features {
        gap: 0.75rem;
    }
    
    .banner-features span {
        font-size: 0.75rem;
    }
}

/* ========================================
   品牌介绍
======================================== */
.brand-intro {
    display: flex;
    align-items: center;
    gap: 3rem;
    padding: 2rem;
    background: #fff;
    border-radius: 1rem;
}

.brand-intro-logo {
    flex-shrink: 0;
    width: 200px;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 1rem;
}

.brand-intro-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 1rem;
}

.brand-intro-content h3 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.brand-intro-content p {
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.brand-intro-content ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.brand-intro-content li {
    color: var(--color-text);
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .brand-intro {
        flex-direction: column;
        text-align: center;
    }
    
    .brand-intro-content ul {
        justify-content: center;
    }
}

/* ========================================
   产品卡片
======================================== */
.chanpin-card {
    display: flex;
    gap: 2rem;
    padding: 1.5rem;
    background: #fff;
    border: 1px solid #99cfec;
}

.chanpin-card-image {
    flex-shrink: 0;
    width: 280px;
    height: 210px;
    border-radius: 0.75rem;
    overflow: hidden;
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chanpin-card-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.chanpin-card-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.chanpin-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #99cfec;
}

.chanpin-card-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
}

.chanpin-card-links {
    display: flex;
    gap: 1rem;
}

.chanpin-card-links a {
    color: #0071E3;
    font-size: 0.875rem;
    text-decoration: none;
}

.chanpin-card-links a:hover {
    text-decoration: underline;
}

.chanpin-card-tags {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.chanpin-tag {
    padding: 0.25rem 0.75rem;
    background: rgba(0, 113, 227, 0.1);
    color: #0071E3;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 500;
}

.chanpin-card-info p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.chanpin-card-features {
    display: flex;
    gap: 2rem;
}

.feature-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.feature-item strong {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.feature-item span {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
}

@media (max-width: 768px) {
    .chanpin-card {
        flex-direction: column;
    }
    
    .chanpin-card-image {
        width: 100%;
        height: 200px;
    }
}

/* ========================================
   品牌卡片区
======================================== */
.section {
    padding: var(--spacing-2xl) 0;
    max-width: 1200px;
    margin: 20px auto 0;
    background-color: #ffffff;
    border-radius: 1rem;
    border: 1px solid rgba(75, 108, 151, 0.5);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    padding-top: 0;
}

.section-title h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.section-title p {
    color: var(--color-text-muted);
    font-size: 1.125rem;
}

.brand-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

@media (max-width: 1024px) {
    .brand-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .brand-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .brand-grid {
        grid-template-columns: 1fr;
    }
}

.brand-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    border: 1px solid var(--color-border-light);
    text-decoration: none;
}

.brand-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.brand-card:hover .brand-icon {
    transform: scale(1.05);
}

.brand-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-normal);
    border: 1px solid rgba(128, 128, 128, 0.25);
}

.brand-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--radius-lg);
}

.brand-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.brand-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
    color: #1d1d1f;
}

.brand-card .btn {
    background: transparent;
    border: 1.5px solid var(--color-primary);
    color: var(--color-primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.brand-card .btn:hover {
    background: var(--color-primary);
    color: white;
}

/* ========================================
   合作银行区
======================================== */
.bank-section {
    background-color: #ffffff;
    padding: var(--spacing-3xl) 0;
    max-width: 1200px;
    margin: 20px auto 0;
    border-radius: 1rem;
    border: 1px solid rgba(75, 108, 151, 0.5);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.bank-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

@media (max-width: 768px) {
    .bank-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.bank-card {
    background: var(--color-bg-dark);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    border: 1px solid var(--color-border-light);
}

.bank-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.bank-icon {
    width: 52px;
    height: 52px;
    margin: 0 auto var(--spacing-md);
    background: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.bank-icon svg {
    width: 26px;
    height: 26px;
    color: white;
}

.bank-card h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.bank-card .fee-badge {
    display: inline-block;
    background: var(--color-success);
    color: white;
    font-size: 0.75rem;
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

/* ========================================
   申请区
======================================== */
.apply-section {
    background-color: #ffffff;
    text-align: center;
    padding: var(--spacing-3xl) 0;
    max-width: 1200px;
    margin: 20px auto 0;
    border-radius: 1rem;
    border: 1px solid rgba(75, 108, 151, 0.5);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.apply-content {
    max-width: 600px;
    margin: 0 auto;
}

.apply-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.apply-subtitle {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
}

.apply-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--color-primary);
    color: white;
    font-size: 1.125rem;
    font-weight: 500;
    padding: var(--spacing-md) var(--spacing-2xl);
    border-radius: var(--radius-xl);
    text-decoration: none;
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.apply-cta:hover {
    background: var(--color-primary-dark);
    transform: scale(1.02);
}

.apply-cta svg {
    width: 20px;
    height: 20px;
}

/* ========================================
   知识推荐区
======================================== */
.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

@media (max-width: 768px) {
    .knowledge-grid {
        grid-template-columns: 1fr;
    }
}

.knowledge-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    cursor: pointer;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    border: 1px solid var(--color-border-light);
    text-decoration: none;
}

.knowledge-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.knowledge-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    transition: color var(--transition-fast);
    text-decoration: none;
}

.knowledge-card:hover h3 {
    color: var(--color-primary);
}

.knowledge-card p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    line-height: 1.6;
}

.knowledge-more {
    text-align: center;
    margin-top: var(--spacing-xl);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: transparent;
    border: 1.5px solid var(--color-text);
    color: var(--color-text);
    font-size: 1rem;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-decoration: none;
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.btn-outline:hover {
    background: var(--color-text);
    color: var(--color-bg-dark);
}

.btn-outline svg {
    width: 18px;
    height: 18px;
}

/* ========================================
   底部导航
======================================== */
.footer {
    background-color: #ffffff;
    border-top: 1px solid var(--color-border-light);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    max-width: 1200px;
    margin: 20px auto 0;
    border-radius: 1rem;
    border: 1px solid rgba(75, 108, 151, 0.5);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .footer-content {
        grid-template-columns: 1fr;
    }
}

.footer-brand h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    line-height: 1.6;
}

.footer-nav h4 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.footer-nav ul {
    list-style: none;
}

.footer-nav li {
    margin-bottom: var(--spacing-sm);
}

.footer-nav a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border-light);
    color: var(--color-text-muted);
    font-size: 0.75rem;
}

/* ========================================
   浮动电话模块
======================================== */
.floating-contact {
    position: fixed;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 999;
}

.floating-contact-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    text-decoration: none;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.floating-contact-btn:hover {
    transform: scale(1.08);
    box-shadow: var(--shadow-xl);
}

.floating-contact-btn svg {
    width: 24px;
    height: 24px;
    color: white;
}

.floating-contact-btn span {
    font-size: 0.625rem;
    font-weight: 500;
    color: white;
    margin-top: 2px;
}

.floating-contact-pc {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.floating-contact-mobile {
    display: none;
}

/* 移动端浮动模块 */
@media (max-width: 768px) {
    .floating-contact {
        right: 16px;
        bottom: 24px;
        top: auto;
        transform: none;
    }
    
    .floating-contact-btn {
        width: 52px;
        height: 52px;
    }
    
    .floating-contact-pc {
        display: none;
    }
    
    .floating-contact-mobile {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
}

/* ========================================
   知识页样式
======================================== */
.page-header {
    background-color: var(--color-bg-card);
    padding: var(--spacing-3xl) 0;
    text-align: center;
    max-width: 1200px;
    margin: 0 auto;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.page-header p {
    color: var(--color-text-muted);
    font-size: 1.125rem;
}

.knowledge-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.knowledge-item {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    cursor: pointer;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    border: 1px solid var(--color-border-light);
}

.knowledge-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.knowledge-item h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    transition: color var(--transition-fast);
}

.knowledge-item:hover h2 {
    color: var(--color-primary);
}

.knowledge-item p {
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* 分页导航 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
}

.pagination-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--spacing-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.pagination-btn:hover:not(.disabled) {
    border-color: var(--color-primary);
}

.pagination-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.pagination-btn.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pagination-btn svg {
    width: 18px;
    height: 18px;
}

/* ========================================
   响应式设计
======================================== */
@media (max-width: 1024px) {
    .navbar-nav {
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .navbar-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg-dark);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        border-top: 1px solid var(--color-border-light);
    }
    
    .navbar-nav.active {
        display: flex;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
    
    .apply-title {
        font-size: 1.5rem;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
}

/* ========================================
   动画效果
======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.4s ease forwards;
}

/* 减少动画 (无障碍) */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ========================================
   知识页新样式
======================================== */

/* 知识分类标签 */
.knowledge-tags-section {
    padding: var(--spacing-lg) 0 !important;
}

.knowledge-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
}

.knowledge-tag {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: 2rem;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.knowledge-tag:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.knowledge-tag.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

/* 精选文章 */
.featured-articles {
    padding-top: var(--spacing-xl) !important;
}

.featured-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--spacing-lg);
}

@media (max-width: 1024px) {
    .featured-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .featured-grid {
        grid-template-columns: 1fr;
    }
}

.featured-card {
    background: white;
    border-radius: 1rem;
    border: 1px solid rgba(75, 108, 151, 0.5);
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.featured-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.featured-main {
    grid-row: span 2;
}

@media (max-width: 768px) {
    .featured-main {
        grid-row: span 1;
    }
}

.featured-card-image {
    height: 180px;
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.featured-main .featured-card-image {
    height: 320px;
}

.featured-badge {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: #ff6b6b;
}

.featured-badge svg {
    width: 14px;
    height: 14px;
}

.featured-badge.important {
    color: var(--color-primary);
}

.featured-card-content {
    padding: var(--spacing-lg);
}

.featured-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.featured-card-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.featured-card-meta svg {
    width: 14px;
    height: 14px;
}

.featured-card-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    line-height: 1.4;
}

.featured-main .featured-card-content h3 {
    font-size: 1.5rem;
}

.featured-card-content p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.featured-card-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--color-primary);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    transition: gap var(--transition-fast);
}

.featured-card-link:hover {
    gap: 8px;
}

.featured-card-link svg {
    width: 16px;
    height: 16px;
}

/* 文章列表布局 */
.article-list-section {
    padding-top: var(--spacing-xl) !important;
}

.article-list-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--spacing-xl);
}

@media (max-width: 1024px) {
    .article-list-layout {
        grid-template-columns: 1fr;
    }
}

/* 文章列表 */
.article-list .section-title {
    margin-bottom: var(--spacing-xl);
}

.article-item {
    background: white;
    border: 1px solid rgba(75, 108, 151, 0.5);
    border-radius: 1rem;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
}

.article-item-image {
    flex-shrink: 0;
    width: 180px;
    height: 120px;
    border-radius: 0.75rem;
    overflow: hidden;
    background: #f0f0f0;
}

.article-item-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.article-item-content {
    flex: 1;
    min-width: 0;
}

.article-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.article-item-tag {
    display: inline-block;
    padding: 2px 10px;
    background: rgba(75, 108, 151, 0.1);
    color: var(--color-primary);
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.article-item-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-fast);
}

.article-item:hover .article-item-title {
    color: var(--color-primary);
}

.article-item-desc {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.article-item-meta {
    display: flex;
    gap: var(--spacing-lg);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.article-item-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.article-item-meta svg {
    width: 14px;
    height: 14px;
}

/* 侧边栏 */
.article-sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.sidebar-widget {
    background: white;
    border: 1px solid rgba(75, 108, 151, 0.5);
    border-radius: 1rem;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.sidebar-widget-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-primary);
}

.sidebar-widget-title svg {
    width: 18px;
    height: 18px;
    color: var(--color-primary);
}

/* 热门排行 */
.sidebar-rank-list {
    list-style: none;
}

.sidebar-rank-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.sidebar-rank-list li:last-child {
    border-bottom: none;
}

.rank-num {
    width: 24px;
    height: 24px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    flex-shrink: 0;
}

.rank-content h5 {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 2px;
    line-height: 1.4;
}

.rank-content span {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* 侧边栏申请 */
.sidebar-apply {
    background: linear-gradient(135deg, var(--color-primary) 0%, #5AC8FA 100%);
    text-align: center;
}

.sidebar-apply .sidebar-widget-title {
    color: white;
    border-bottom-color: rgba(255, 255, 255, 0.3);
    justify-content: center;
}

.sidebar-apply .sidebar-widget-title svg {
    color: white;
}

.sidebar-apply p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-lg);
}

.sidebar-apply-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: white;
    color: var(--color-primary);
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-decoration: none;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.sidebar-apply-btn:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

.sidebar-apply-btn svg {
    width: 18px;
    height: 18px;
}

/* 侧边栏品牌 */
.sidebar-brands {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
}

.sidebar-brand-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
    text-decoration: none;
}

.sidebar-brand-item:hover {
    background: var(--color-bg-card);
}

.sidebar-brand-item img {
    width: 40px;
    height: 40px;
    object-fit: contain;
    border-radius: var(--radius-sm);
}

.sidebar-brand-item span {
    font-size: 0.75rem;
    color: var(--color-text);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .article-sidebar {
        position: static;
    }
    
    .featured-main .featured-card-image {
        height: 200px;
    }
    
    .featured-main .featured-card-content h3 {
        font-size: 1.25rem;
    }
    
    .article-item {
        flex-direction: column;
    }
    
    .article-item-image {
        width: 100%;
        height: 160px;
    }
}