/* ===== CSS变量 ===== */
:root {
    /* 主题色 - 优雅粉色系 */
    --primary-color: #ff7eb3;
    --primary-dark: #ff5c99;
    --primary-light: #ffa5c8;
    --accent-color: #ff91b8;
    
    /* 中性色 */
    --text-primary: #2c2c2c;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-white: #ffffff;
    --bg-light: #f8f8f8;
    --bg-gray: #fafafa;
    --bg-dark: #2c2c2c;
    
    /* 阴影 - 更轻柔 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.1);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 50px;
    
    /* 动画 */
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* 间距 */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 80px;
    --spacing-xxl: 120px;
}

/* ===== 基础样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans SC', sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-gray);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

ul {
    list-style: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    transition: var(--transition);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo i {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-sm);
}

.nav-menu a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
    padding: 10px 18px;
    border-radius: var(--radius-full);
    transition: var(--transition);
}

.nav-menu a:hover {
    color: var(--primary-color);
    background: rgba(255, 126, 179, 0.08);
}

.nav-cta .btn-primary {
    padding: 12px 28px;
    border-radius: var(--radius-full);
    background: var(--primary-color);
    color: white;
    font-weight: 600;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.nav-cta .btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 8px;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ===== Hero区域 ===== */
.hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    padding-top: 80px;
    padding-bottom: var(--spacing-xl);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    overflow: hidden;
}

.gradient-overlay {
    display: none;
}

.animated-bg {
    position: absolute;
    width: 100%;
    height: 100%;
}

.circle {
    position: absolute;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(255, 126, 179, 0.08), rgba(255, 145, 184, 0.12));
    animation: float 25s infinite ease-in-out;
}

.circle-1 {
    width: 400px;
    height: 400px;
    top: -100px;
    right: -100px;
}

.circle-2 {
    width: 300px;
    height: 300px;
    bottom: -50px;
    left: -50px;
    animation-delay: 8s;
}

.circle-3 {
    width: 200px;
    height: 200px;
    top: 50%;
    left: 10%;
    animation-delay: 15s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(30px, -30px);
    }
}

.hero-content {
    text-align: center;
    color: var(--text-primary);
    max-width: 900px;
    padding: var(--spacing-md) 0;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: white;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.hero-badge i {
    color: var(--primary-color);
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

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

.hero-subtitle {
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.btn-hero {
    padding: 18px 40px;
    border-radius: var(--radius-full);
    font-size: 1rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
}

.btn-hero.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-hero.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-hero.btn-secondary {
    background: white;
    color: var(--text-primary);
    border: 2px solid var(--bg-light);
    box-shadow: var(--shadow-sm);
}

.btn-hero.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    max-width: 800px;
    margin: 0 auto;
}

.stat-item {
    padding: var(--spacing-md);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 120px;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
    white-space: nowrap;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    opacity: 0.5;
    animation: bounce 2s infinite;
}

.mouse {
    width: 22px;
    height: 36px;
    border: 2px solid var(--text-secondary);
    border-radius: 12px;
    position: relative;
}

.wheel {
    width: 2px;
    height: 6px;
    background: var(--text-secondary);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(12px);
    }
}

.arrow {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.arrow span {
    width: 10px;
    height: 2px;
    background: var(--text-secondary);
    border-radius: 2px;
}

.arrow span:first-child {
    transform: rotate(45deg) translateX(3px);
}

.arrow span:last-child {
    transform: rotate(-45deg) translateX(-3px);
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(8px);
    }
}

/* ===== 通用区块样式 ===== */
section {
    padding: var(--spacing-xxl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-tag {
    display: inline-block;
    padding: 6px 18px;
    background: rgba(255, 126, 179, 0.1);
    color: var(--primary-color);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.05em;
}

.section-title {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.section-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    font-weight: 400;
}

/* ===== 关于区块 ===== */
.about-section {
    background: white;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-md);
}

.about-card {
    background: var(--bg-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    border: 1px solid transparent;
}

.about-card:hover {
    background: white;
    border-color: rgba(255, 126, 179, 0.2);
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.about-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    background: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.about-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.about-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    text-align: center;
    font-size: 0.95rem;
}

/* ===== 内容资源区块 ===== */
.content-section {
    background: var(--bg-light);
}

.content-tabs {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.tab-btn {
    padding: 12px 24px;
    border-radius: var(--radius-full);
    background: white;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid transparent;
}

.tab-btn:hover {
    color: var(--primary-color);
    border-color: rgba(255, 126, 179, 0.2);
}

.tab-btn.active {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.content-feature {
    background: white;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: var(--transition);
    border: 1px solid transparent;
}

.content-feature:hover {
    border-color: rgba(255, 126, 179, 0.15);
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
}

.feature-icon {
    width: 52px;
    height: 52px;
    background: rgba(255, 126, 179, 0.1);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.content-feature h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.content-feature p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ===== 特色功能区块 ===== */
.features-section {
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background: var(--bg-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    border: 1px solid transparent;
}

.feature-card:hover {
    background: white;
    border-color: rgba(255, 126, 179, 0.2);
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.feature-card-icon {
    width: 60px;
    height: 60px;
    background: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.feature-list i {
    color: var(--primary-color);
    font-size: 1rem;
    margin-top: 3px;
    flex-shrink: 0;
}

/* ===== 社区区块 ===== */
.community-section {
    background: var(--bg-light);
}

.community-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.community-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    position: relative;
    border: 1px solid transparent;
}

.community-card:hover {
    border-color: rgba(255, 126, 179, 0.2);
    box-shadow: var(--shadow-md);
    transform: translateY(-6px);
}

.community-icon {
    width: 56px;
    height: 56px;
    background: rgba(255, 126, 179, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.community-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.community-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.community-badge {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(255, 126, 179, 0.1);
    color: var(--primary-color);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
}

/* ===== 平台优势区块 ===== */
.advantages-section {
    background: var(--bg-dark);
    color: white;
}

.advantages-section .section-tag {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.advantages-section .section-title {
    color: white;
}

.advantages-section .section-description {
    color: rgba(255, 255, 255, 0.7);
}

.advantages-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

.advantage-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.04);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.advantage-item:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 126, 179, 0.3);
    transform: translateX(8px);
}

.advantage-number {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--primary-color);
    flex-shrink: 0;
    line-height: 1;
}

.advantage-content h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.advantage-content i {
    color: var(--primary-color);
}

.advantage-content p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* ===== CTA区块 ===== */
.cta-section {
    background: white;
    text-align: center;
}

/* ===== 文章资讯区块 ===== */
.articles-section {
    background: white;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.article-card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid transparent;
}

.article-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(255, 126, 179, 0.2);
    background: white;
}

.article-image {
    position: relative;
    width: 100%;
    padding-top: 60%;
    overflow: hidden;
    background: var(--bg-gray);
}

.article-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.article-card:hover .article-image img {
    transform: scale(1.05);
}

.article-category {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 6px 14px;
    background: var(--primary-color);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
}

.article-content {
    padding: var(--spacing-md);
}

.article-content h3 {
    margin-bottom: var(--spacing-sm);
}

.article-content h3 a {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-content h3 a:hover {
    color: var(--primary-color);
}

.article-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.85rem;
    color: var(--text-light);
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.article-meta i {
    color: var(--primary-color);
}

/* ===== 文章内页样式 ===== */
.article-page {
    background: var(--bg-light);
    padding: 0 0 var(--spacing-xl);
}

.article-cover {
    width: 100%;
    height: 400px;
    overflow: hidden;
    margin-bottom: var(--spacing-xl);
    margin-top: 80px;
}

.article-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.article-header {
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.article-header h1 {
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1.4;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.article-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-light);
    border-radius: var(--radius-md);
    flex-wrap: wrap;
}

.article-info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.article-info-item i {
    color: var(--primary-color);
}

.article-body {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.article-body h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: var(--spacing-lg) 0 var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--bg-light);
}

.article-body h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

.article-body p {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.article-body ul,
.article-body ol {
    margin: var(--spacing-md) 0;
    padding-left: 28px;
}

.article-body li {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.article-body strong {
    color: var(--text-primary);
    font-weight: 600;
}

.article-body blockquote {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    background: var(--bg-light);
    border-left: 4px solid var(--primary-color);
    border-radius: var(--radius-sm);
}

.article-body blockquote p {
    margin: 0;
    font-style: italic;
}

.article-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--bg-gray);
}

.article-tag {
    padding: 6px 16px;
    background: var(--bg-light);
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    transition: var(--transition);
}

.article-tag:hover {
    background: var(--primary-color);
    color: white;
}

.article-footer {
    max-width: 800px;
    margin: var(--spacing-md) auto 0;
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.article-share {
    margin-bottom: var(--spacing-md);
}

.article-share h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.share-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.share-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition);
    color: white;
}

.share-btn.weibo {
    background: #e6162d;
}

.share-btn.wechat {
    background: #09bb07;
}

.share-btn.qq {
    background: #12b7f5;
}

.share-btn.twitter {
    background: #1da1f2;
}

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

.back-to-articles {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    background: var(--bg-light);
    color: var(--text-primary);
    border-radius: var(--radius-full);
    font-weight: 600;
    transition: var(--transition);
}

.back-to-articles:hover {
    background: var(--primary-color);
    color: white;
}

/* ===== CTA区块 ===== */
.cta-section {
    background: white;
    text-align: center;
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
}

.cta-icon {
    width: 80px;
    height: 80px;
    background: rgba(255, 126, 179, 0.1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin: 0 auto var(--spacing-md);
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.cta-content p {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
}

.btn-cta {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 48px;
    background: var(--primary-color);
    color: white;
    border-radius: var(--radius-full);
    font-size: 1.1rem;
    font-weight: 700;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    margin-bottom: var(--spacing-lg);
}

.btn-cta:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.cta-features {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.cta-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--bg-light);
    border-radius: var(--radius-full);
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.cta-feature i {
    color: var(--primary-color);
    font-size: 1.1rem;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.footer-logo i {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
}

.footer-social {
    display: flex;
    gap: 10px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
    font-size: 0.9rem;
}

.footer-column a:hover {
    color: var(--primary-color);
    padding-left: 4px;
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
}

/* ===== 返回顶部按钮 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3.5rem;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xl: 60px;
        --spacing-xxl: 80px;
    }
    
    .article-cover {
        height: 250px;
        margin-top: 60px;
    }
    
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: var(--transition);
        border-top: 1px solid rgba(0, 0, 0, 0.06);
    }
    
    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .nav-cta {
        display: none;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn-hero {
        justify-content: center;
        width: 100%;
    }
    
    .hero-stats {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-sm);
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .content-tabs {
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 10px;
        -webkit-overflow-scrolling: touch;
    }
    
    .tab-btn {
        flex-shrink: 0;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .advantage-item {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .cta-content h2 {
        font-size: 2rem;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .article-header h1 {
        font-size: 1.8rem;
    }
    
    .article-info {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 32px;
        --spacing-xl: 48px;
        --spacing-xxl: 64px;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .about-grid,
    .content-grid,
    .features-grid,
    .community-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-stats {
        grid-template-columns: 1fr 1fr;
    }
    
    .btn-cta {
        padding: 16px 36px;
        font-size: 1rem;
    }
}

/* ===== 页面内容样式 ===== */
.page-content {
    padding: calc(80px + var(--spacing-xl)) 0 var(--spacing-xl);
    background: var(--bg-light);
    min-height: 100vh;
}

.page-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.page-header h1 i {
    color: var(--primary-color);
}

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

/* ===== FAQ页面样式 ===== */
.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-category {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.faq-category h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 10px;
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--bg-light);
}

.faq-category h2 i {
    color: var(--primary-color);
}

.faq-item {
    padding: var(--spacing-md);
    background: var(--bg-light);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    transition: var(--transition);
}

.faq-item:last-child {
    margin-bottom: 0;
}

.faq-item:hover {
    background: white;
    box-shadow: var(--shadow-sm);
}

.faq-item h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.faq-item p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* ===== 帮助CTA样式 ===== */
.help-cta {
    margin-top: var(--spacing-xl);
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
}

.help-cta-content i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.help-cta-content h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.help-cta-content p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.help-cta-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== 用户手册样式 ===== */
.manual-container {
    max-width: 900px;
    margin: 0 auto;
}

.manual-section {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.manual-section h2 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 10px;
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--bg-light);
}

.manual-section h2 i {
    color: var(--primary-color);
}

.manual-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

.manual-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

.manual-content ul,
.manual-content ol {
    margin: var(--spacing-sm) 0;
    padding-left: 24px;
}

.manual-content li {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 8px;
    list-style: disc;
}

.manual-content ol li {
    list-style: decimal;
}

.manual-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* ===== 技术支持页面样式 ===== */
.support-intro {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.support-intro-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.support-intro-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.support-intro-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.support-intro-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.support-intro-card p {
    color: var(--text-secondary);
}

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

.support-section {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.support-section h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 10px;
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--bg-light);
}

.support-section h2 i {
    color: var(--primary-color);
}

.contact-methods {
    display: grid;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-light);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.contact-item:hover {
    background: white;
    box-shadow: var(--shadow-sm);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 126, 179, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

.contact-info h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.contact-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary-color);
    font-weight: 600;
    margin-top: 8px;
    transition: var(--transition);
}

.contact-link:hover {
    gap: 10px;
}

.tech-issues {
    display: grid;
    gap: var(--spacing-md);
}

.tech-issue-item {
    padding: var(--spacing-md);
    background: var(--bg-light);
    border-radius: var(--radius-md);
}

.tech-issue-item h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.tech-issue-item ul {
    list-style: none;
}

.tech-issue-item li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.tech-issue-item li:last-child {
    border-bottom: none;
}

.tech-issue-item strong {
    color: var(--text-primary);
    font-weight: 600;
}

.system-requirements {
    display: grid;
    gap: var(--spacing-md);
}

.requirement-item {
    padding: var(--spacing-md);
    background: var(--bg-light);
    border-radius: var(--radius-md);
}

.requirement-item h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: 8px;
}

.requirement-item i {
    color: var(--primary-color);
}

.requirement-item ul {
    list-style: none;
}

.requirement-item li {
    padding: 6px 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.security-tips {
    display: grid;
    gap: var(--spacing-sm);
}

.tip-item {
    display: flex;
    gap: 12px;
    padding: var(--spacing-sm);
    background: var(--bg-light);
    border-radius: var(--radius-sm);
}

.tip-item i {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-top: 2px;
    flex-shrink: 0;
}

.tip-item h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.tip-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.help-docs {
    display: grid;
    gap: var(--spacing-sm);
}

.help-doc-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-light);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.help-doc-item:hover {
    background: white;
    box-shadow: var(--shadow-sm);
    transform: translateX(4px);
}

.help-doc-item > i:first-child {
    width: 50px;
    height: 50px;
    background: rgba(255, 126, 179, 0.1);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

.help-doc-item > div {
    flex: 1;
}

.help-doc-item h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.help-doc-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.help-doc-item > i:last-child {
    color: var(--text-light);
    font-size: 1.2rem;
}

/* ===== 反馈页面样式 ===== */
.feedback-container {
    max-width: 800px;
    margin: 0 auto;
}

.feedback-intro {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.feedback-intro h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.feedback-intro ul {
    list-style: none;
}

.feedback-intro li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    color: var(--text-secondary);
}

.feedback-intro i {
    color: var(--primary-color);
}

.feedback-form-wrapper {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.feedback-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group label i {
    color: var(--primary-color);
}

.required {
    color: #dc3545;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    border: 1px solid var(--bg-gray);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background: var(--bg-light);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: white;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-hint {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: 6px;
}

.form-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.feedback-channels {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.feedback-channels h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.channel-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
}

.channel-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--bg-light);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.channel-item:hover {
    background: white;
    box-shadow: var(--shadow-sm);
    transform: translateY(-4px);
}

.channel-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.channel-item h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.channel-item p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.channel-item a {
    color: var(--primary-color);
    font-weight: 600;
}

.feedback-stats {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.feedback-stats h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.stat-card {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--bg-light);
    border-radius: var(--radius-md);
}

/* ===== 法律页面样式 ===== */
.legal-container {
    max-width: 900px;
    margin: 0 auto;
}

.legal-section {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.legal-section h2 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--bg-light);
}

.legal-section h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

.legal-section p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
}

.legal-section ul,
.legal-section ol {
    margin: var(--spacing-sm) 0;
    padding-left: 24px;
}

.legal-section li {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 10px;
    list-style: disc;
}

.legal-section ol li {
    list-style: decimal;
}

.legal-section strong {
    color: var(--text-primary);
    font-weight: 600;
}

.legal-section a {
    color: var(--primary-color);
    text-decoration: underline;
}

.legal-section a:hover {
    color: var(--primary-dark);
}

.legal-notice {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--bg-light);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
    font-size: 1rem;
    color: var(--text-primary);
}

/* ===== 响应式样式 ===== */
@media (max-width: 768px) {
    .page-header h1 {
        font-size: 2rem;
        flex-direction: column;
        gap: 8px;
    }
    
    .contact-item {
        flex-direction: column;
        text-align: center;
    }
    
    .help-cta-buttons {
        flex-direction: column;
    }
    
    .help-cta-buttons .btn-hero {
        width: 100%;
        justify-content: center;
    }
    
    .support-intro {
        grid-template-columns: 1fr;
    }
    
    .channel-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions .btn-hero {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .page-content {
        padding: calc(80px + var(--spacing-lg)) 0 var(--spacing-lg);
    }
    
    .page-header h1 {
        font-size: 1.8rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}