/* ==========================================
   CSS变量 - 主题色彩定义
   ========================================== */
:root {
    /* 主色调 - 参考logo的粉色系 */
    --primary-color: #ec6d8f;
    --primary-dark: #d85979;
    --primary-light: #f188a5;
    --secondary-color: #ea5c7e;
    --secondary-dark: #d54968;
    
    /* 渐变色 - 基于logo粉色 */
    --gradient-primary: linear-gradient(135deg, #ec6d8f 0%, #ea5c7e 100%);
    --gradient-secondary: linear-gradient(135deg, #f188a5 0%, #ec6d8f 100%);
    --gradient-accent: linear-gradient(135deg, #ffa6c1 0%, #ec6d8f 100%);
    --gradient-warm: linear-gradient(135deg, #ec6d8f 0%, #feb47b 100%);
    --gradient-cool: linear-gradient(135deg, #a890fe 0%, #ec6d8f 100%);
    --gradient-hero: linear-gradient(135deg, #ffa6c1 0%, #ec6d8f 50%, #ea5c7e 100%);
    
    /* 中性色 */
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --text-light: #a0aec0;
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-tertiary: #edf2f7;
    
    /* 边框和阴影 */
    --border-color: #e2e8f0;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
    --shadow-colored: 0 10px 30px rgba(102, 126, 234, 0.3);
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

body {
    font-family: 'Noto Sans SC', 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

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

/* ==========================================
   容器和布局
   ========================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* ==========================================
   导航栏
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-icon {
    width: 42px;
    height: 42px;
    object-fit: contain;
    border-radius: var(--radius-sm);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--text-primary);
    font-weight: 500;
    position: relative;
    padding: var(--spacing-xs) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    font-size: 1.5rem;
    color: var(--text-primary);
}

/* 移动端导航 */
@media (max-width: 968px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        transition: left var(--transition-base);
    }
    
    .nav-menu.active {
        left: 0;
    }
}

/* ==========================================
   Hero区域 - 紧凑版
   ========================================== */
.hero {
    position: relative;
    min-height: 70vh;
    display: flex;
    align-items: center;
    padding: calc(80px + var(--spacing-xl)) 0 var(--spacing-xl);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #ffa6c1 0%, #ec6d8f 50%, #ea5c7e 100%);
    z-index: -1;
}

.gradient-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(255, 166, 193, 0.9) 0%, 
        rgba(236, 109, 143, 0.85) 30%,
        rgba(234, 92, 126, 0.9) 70%,
        rgba(216, 89, 121, 0.95) 100%
    );
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.8) 0%, transparent 3px),
        radial-gradient(circle at 60% 70%, rgba(255, 255, 255, 0.6) 0%, transparent 2px),
        radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.7) 0%, transparent 2px),
        radial-gradient(circle at 80% 10%, rgba(255, 255, 255, 0.5) 0%, transparent 2px),
        radial-gradient(circle at 90% 60%, rgba(255, 255, 255, 0.8) 0%, transparent 3px),
        radial-gradient(circle at 15% 80%, rgba(255, 255, 255, 0.4) 0%, transparent 2px),
        radial-gradient(circle at 40% 20%, rgba(255, 255, 255, 0.6) 0%, transparent 2px);
    background-size: 200% 200%;
    animation: particles 20s ease-in-out infinite;
    opacity: 0.6;
}

@keyframes particles {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(10px, 10px); }
    50% { transform: translate(-10px, 20px); }
    75% { transform: translate(20px, -10px); }
}

/* Hero装饰渐变 */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at top left, rgba(255, 166, 193, 0.3) 0%, transparent 50%),
        radial-gradient(ellipse at bottom right, rgba(234, 92, 126, 0.3) 0%, transparent 50%),
        radial-gradient(ellipse at center, rgba(236, 109, 143, 0.2) 0%, transparent 70%);
    z-index: 0;
    pointer-events: none;
}

.hero-content {
    text-align: center;
    color: white;
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 2.75rem;
    font-weight: 900;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.title-line {
    display: block;
}

.title-highlight {
    display: block;
    background: linear-gradient(135deg, 
        #ffffff 0%, 
        #fff5f7 30%,
        #ffe8ee 60%,
        #ffd4e0 100%
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 3.25rem;
    text-shadow: 0 2px 20px rgba(255, 255, 255, 0.3);
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    opacity: 0.95;
}

.hero-description {
    font-size: 1rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
    max-width: 550px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

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

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(15px);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all var(--transition-base);
}

.stat-item:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.stat-item i {
    font-size: 1.5rem;
    opacity: 0.9;
}

.stat-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.stat-number {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1;
}

.stat-label {
    font-size: 0.75rem;
    opacity: 0.8;
}

/* ==========================================
   按钮样式
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-base);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn i {
    font-size: 1.125rem;
}

.btn-primary {
    background: white;
    color: var(--primary-color);
    box-shadow: 0 4px 20px rgba(236, 109, 143, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(236, 109, 143, 0.5);
    background: #fffbfc;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
}

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

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

/* ==========================================
   Section通用样式
   ========================================== */
section {
    padding: var(--spacing-2xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ==========================================
   核心功能区域
   ========================================== */
.features {
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 70px;
    height: 70px;
    border-radius: var(--radius-xl);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: white;
    font-size: 2rem;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================
   网站特色区域
   ========================================== */
.highlights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.highlight-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.highlight-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.highlight-icon-wrapper {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    border-radius: 50%;
    background: var(--gradient-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2.5rem;
}

.highlight-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

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

/* ==========================================
   技术亮点区域
   ========================================== */
.tech-section {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    position: relative;
    overflow: hidden;
}

.tech-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.tech-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tech-intro {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.tech-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.tech-list li {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.tech-list i {
    color: var(--primary-color);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.tech-list strong {
    display: block;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.tech-list p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.tech-visual {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
}

.tech-circle-1 {
    width: 300px;
    height: 300px;
    background: var(--gradient-primary);
    animation: float 6s ease-in-out infinite;
}

.tech-circle-2 {
    width: 200px;
    height: 200px;
    background: var(--gradient-secondary);
    animation: float 4s ease-in-out infinite reverse;
}

.tech-circle-3 {
    width: 100px;
    height: 100px;
    background: var(--gradient-accent);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(20px, -20px) rotate(180deg); }
}

.tech-icon-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.tech-icon-grid i {
    font-size: 4rem;
    color: var(--primary-color);
    padding: var(--spacing-xl);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

/* ==========================================
   适用人群区域
   ========================================== */
.audience-section {
    background: var(--bg-secondary);
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.audience-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.audience-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-color);
}

.audience-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--spacing-md);
    border-radius: 50%;
    background: var(--gradient-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
}

.audience-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

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

/* ==========================================
   新闻动态区域
   ========================================== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.news-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    display: flex;
    gap: var(--spacing-md);
    transition: all var(--transition-base);
    border: 1px solid var(--border-color);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.news-date {
    flex-shrink: 0;
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
}

.date-day {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1;
}

.date-month {
    font-size: 0.875rem;
    opacity: 0.9;
}

.news-content {
    flex: 1;
}

.news-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.news-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.news-link {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.875rem;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.news-link:hover {
    gap: 0.5rem;
}

/* ==========================================
   常见问题区域
   ========================================== */
.faq {
    background: var(--bg-secondary);
}

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

.faq-item {
    background: white;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.faq-question {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    transition: all var(--transition-base);
}

.faq-question:hover {
    background: var(--bg-secondary);
}

.faq-question i {
    transition: transform var(--transition-base);
    color: var(--primary-color);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: all var(--transition-base);
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 var(--spacing-lg) var(--spacing-md);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================
   用户评价区域
   ========================================== */
.rating-summary {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.rating-score {
    text-align: center;
}

.score-number {
    font-size: 4rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.stars {
    color: #fbbf24;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.rating-count {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.rating-tags {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
}

.tag {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
}

.reviews-slider {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.review-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--border-color);
}

.review-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.reviewer-info {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.reviewer-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.reviewer-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.review-stars {
    color: #fbbf24;
    font-size: 0.875rem;
}

.review-date {
    color: var(--text-light);
    font-size: 0.875rem;
}

.review-text {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================
   CTA区域
   ========================================== */
.cta-section {
    background: var(--gradient-hero);
    color: white;
    text-align: center;
    padding: var(--spacing-2xl) 0;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
}

/* ==========================================
   页脚
   ========================================== */
.footer {
    background: linear-gradient(135deg, #2d3748 0%, #1a202c 100%);
    color: white;
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: white;
}

.footer-description {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: all var(--transition-fast);
}

.footer-links a:hover {
    color: white;
    padding-left: var(--spacing-xs);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom p {
    margin: var(--spacing-xs) 0;
    font-size: 0.875rem;
}

.footer-disclaimer {
    opacity: 0.7;
}

/* ==========================================
   返回顶部按钮
   ========================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* ==========================================
   响应式设计 - 平板
   ========================================== */
@media (max-width: 968px) {
    .hero {
        min-height: 60vh;
        padding: calc(80px + var(--spacing-lg)) 0 var(--spacing-lg);
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .title-highlight {
        font-size: 2.75rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }
    
    .stat-item {
        flex: 1 1 calc(50% - var(--spacing-sm));
        min-width: 140px;
    }
    
    .tech-content {
        grid-template-columns: 1fr;
    }
    
    .tech-visual {
        display: none;
    }
    
    .rating-summary {
        flex-direction: column;
        text-align: center;
    }
}

/* ==========================================
   响应式设计 - 手机
   ========================================== */
@media (max-width: 640px) {
    :root {
        font-size: 14px;
    }
    
    .hero {
        min-height: 55vh;
        padding: calc(70px + var(--spacing-md)) 0 var(--spacing-md);
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .title-highlight {
        font-size: 2.25rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-description {
        font-size: 0.9375rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
        margin-bottom: var(--spacing-md);
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .hero-stats {
        gap: var(--spacing-xs);
        margin-top: var(--spacing-md);
    }
    
    .stat-item {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-sm);
        min-width: 100px;
    }
    
    .stat-info {
        align-items: center;
    }
    
    .stat-item i {
        font-size: 1.25rem;
        margin-bottom: 0.25rem;
    }
    
    .stat-number {
        font-size: 1.125rem;
    }
    
    .stat-label {
        font-size: 0.6875rem;
    }
    
    .features-grid,
    .highlights-grid,
    .audience-grid,
    .news-grid,
    .reviews-slider {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .rating-summary {
        padding: var(--spacing-lg);
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

/* ==========================================
   动画
   ========================================== */
/* 淡入动画已禁用 - 所有内容直接显示 */

/* ==========================================
   工具类
   ========================================== */
.text-center {
    text-align: center;
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

/* ==========================================
   内容页面样式
   ========================================== */
.page-header {
    background: var(--gradient-hero);
    color: white;
    padding: calc(80px + var(--spacing-2xl)) 0 var(--spacing-2xl);
    text-align: center;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    font-size: 1.125rem;
    opacity: 0.95;
}

.article-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.article-date {
    background: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    backdrop-filter: blur(10px);
}

.article-category {
    background: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    backdrop-filter: blur(10px);
}

.article-footer {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--border-color);
    font-size: 1.125rem;
}

.page-content {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-secondary);
}

.page-content .container {
    max-width: 900px;
}

.page-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: var(--spacing-xl) 0 var(--spacing-md);
}

.page-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: var(--spacing-lg) 0 var(--spacing-sm);
}

.page-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.page-content ul, .page-content ol {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-xl);
}

.page-content li {
    margin-bottom: var(--spacing-xs);
}

.page-content a {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: all var(--transition-base);
}

.page-content a:hover {
    border-bottom-color: var(--primary-color);
}

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

.content-section:last-child {
    margin-bottom: 0;
}