/* =====================================================
   AI风月 - 展示官网样式表
   ===================================================== */

/* ----- CSS 变量 ----- */
:root {
    /* 主色调 - 蓝色系 */
    --primary-50: #e3f2fd;
    --primary-100: #bbdefb;
    --primary-200: #90caf9;
    --primary-300: #64b5f6;
    --primary-400: #42a5f5;
    --primary-500: #2196f3;
    --primary-600: #1e88e5;
    --primary-700: #1976d2;
    --primary-800: #1565c0;
    --primary-900: #0d47a1;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #2196f3 0%, #1565c0 50%, #0d47a1 100%);
    --gradient-light: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    --gradient-text: linear-gradient(135deg, #2196f3 0%, #1976d2 50%, #0d47a1 100%);
    --gradient-cta: linear-gradient(135deg, #1976d2 0%, #0d47a1 100%);
    
    /* 中性色 */
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #eeeeee;
    --gray-300: #e0e0e0;
    --gray-400: #bdbdbd;
    --gray-500: #9e9e9e;
    --gray-600: #757575;
    --gray-700: #616161;
    --gray-800: #424242;
    --gray-900: #212121;
    
    /* 文字颜色 */
    --text-primary: #1a1a2e;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --text-light: #a0aec0;
    --text-white: #ffffff;
    
    /* 背景色 */
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-section: #f1f5f9;
    --bg-dark: #0f172a;
    
    /* 功能色 */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-primary: 0 10px 30px -5px rgba(33, 150, 243, 0.4);
    
    /* 边框圆角 */
    --radius-sm: 4px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* 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;
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 字体 */
    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Poppins', 'Noto Sans SC', sans-serif;
    
    /* 层级 */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal: 400;
    --z-tooltip: 500;
}

/* ----- 基础重置 ----- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

ul, ol {
    list-style: none;
}

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

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

/* ----- 容器 ----- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ----- 通用组件 ----- */
/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    transition: all var(--transition);
    cursor: pointer;
    white-space: nowrap;
}

.btn i {
    font-size: 1rem;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 35px -5px rgba(33, 150, 243, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--primary-600);
    border: 2px solid var(--primary-600);
}

.btn-outline:hover {
    background: var(--primary-600);
    color: var(--text-white);
    transform: translateY(-2px);
}

.btn-white {
    background: var(--bg-white);
    color: var(--primary-700);
    box-shadow: var(--shadow-lg);
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.0625rem;
}

/* 渐变文字 */
.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 区块标题 */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-3xl);
}

.section-badge {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: var(--gradient-light);
    color: var(--primary-700);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ----- 导航栏 ----- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: var(--z-fixed);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all var(--transition);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-600);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    color: var(--text-white);
    border-radius: var(--radius-md);
    font-size: 1.25rem;
    overflow: hidden;
}

.logo-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

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

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-link:hover,
.nav-link.active {
    color: var(--primary-600);
}

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

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

.nav-cta {
    padding: 0.625rem 1.25rem;
}

.nav-toggle,
.nav-close {
    display: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
}

/* ----- Hero 区域 ----- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(33, 150, 243, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(21, 101, 192, 0.1) 0%, transparent 40%),
        radial-gradient(ellipse at 40% 80%, rgba(13, 71, 161, 0.08) 0%, transparent 40%),
        linear-gradient(180deg, var(--primary-50) 0%, var(--bg-white) 100%);
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.hero-particles::before,
.hero-particles::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0.05;
    animation: float 15s ease-in-out infinite;
}

.hero-particles::before {
    top: 10%;
    right: -100px;
}

.hero-particles::after {
    bottom: 10%;
    left: -100px;
    animation-delay: -7s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    25% {
        transform: translate(30px, -30px) rotate(90deg);
    }
    50% {
        transform: translate(0, -50px) rotate(180deg);
    }
    75% {
        transform: translate(-30px, -30px) rotate(270deg);
    }
}

.hero-content {
    text-align: center;
    max-width: 900px;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.5rem 1.25rem;
    background: var(--bg-white);
    border: 1px solid var(--primary-200);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--primary-700);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    animation: fadeInUp 0.6s ease forwards;
}

.hero-badge i {
    color: var(--primary-500);
}

.hero-title {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    animation: fadeInUp 0.6s ease 0.1s forwards;
    opacity: 0;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-2xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.6s ease 0.2s forwards;
    opacity: 0;
}

.hero-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-3xl);
    animation: fadeInUp 0.6s ease 0.3s forwards;
    opacity: 0;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-3xl);
    animation: fadeInUp 0.6s ease 0.4s forwards;
    opacity: 0;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-600);
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.9375rem;
    color: var(--text-muted);
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    animation: fadeInUp 0.6s ease 0.5s forwards;
    opacity: 0;
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-muted);
    font-size: 0.875rem;
}

.scroll-indicator i {
    animation: bounce 2s infinite;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(10px);
    }
}

/* ----- 核心功能区 ----- */
.features {
    padding: 100px 0;
    background: var(--bg-light);
}

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

.feature-card {
    background: var(--bg-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: all var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 72px;
    height: 72px;
    background: var(--gradient-light);
    color: var(--primary-600);
    font-size: 1.75rem;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition);
}

.feature-card:hover .feature-icon {
    background: var(--gradient-primary);
    color: var(--text-white);
    transform: scale(1.1);
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ----- 网站特色 ----- */
.highlights {
    padding: 100px 0;
    background: var(--bg-white);
}

.highlights-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

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

.highlight-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-light);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.highlight-item:hover {
    background: var(--primary-50);
    transform: translateX(8px);
}

.highlight-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    color: var(--text-white);
    font-size: 1.25rem;
    border-radius: var(--radius);
    flex-shrink: 0;
}

.highlight-info h4 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.highlight-info p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.highlights-visual {
    display: flex;
    justify-content: center;
}

.visual-card {
    width: 100%;
    max-width: 420px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.visual-header {
    padding: var(--spacing-md);
    background: var(--gray-100);
    border-bottom: 1px solid var(--gray-200);
}

.visual-dots {
    display: flex;
    gap: var(--spacing-sm);
}

.visual-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gray-300);
}

.visual-dots span:first-child {
    background: #ff5f57;
}

.visual-dots span:nth-child(2) {
    background: #febc2e;
}

.visual-dots span:last-child {
    background: #28c840;
}

.visual-content {
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.chat-bubble {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    max-width: 90%;
}

.chat-bubble.chat-user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.chat-bubble .avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.875rem;
}

.chat-ai .avatar {
    background: var(--gradient-primary);
    color: var(--text-white);
}

.chat-user .avatar {
    background: var(--gray-200);
    color: var(--gray-600);
}

.chat-bubble .message {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    line-height: 1.5;
}

.chat-ai .message {
    background: var(--primary-50);
    color: var(--text-primary);
    border-top-left-radius: var(--radius-sm);
}

.chat-user .message {
    background: var(--gradient-primary);
    color: var(--text-white);
    border-top-right-radius: var(--radius-sm);
}

/* ----- 适用人群与应用场景 ----- */
.audience {
    padding: 100px 0;
    background: var(--bg-light);
}

.audience-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.audience-block {
    background: var(--bg-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.audience-header {
    margin-bottom: var(--spacing-xl);
}

.audience-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: var(--spacing-sm);
}

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

.audience-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-light);
    border-radius: var(--radius);
    font-size: 1rem;
    color: var(--text-primary);
    transition: all var(--transition);
}

.audience-item:hover {
    background: var(--primary-50);
    transform: translateX(8px);
}

.audience-item i {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: var(--text-white);
    border-radius: var(--radius);
    font-size: 1rem;
}

/* ----- 新闻动态区 ----- */
.news {
    padding: 100px 0;
    background: var(--bg-white);
}

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

.news-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    transition: all var(--transition);
    position: relative;
}

.news-card:hover {
    border-color: var(--primary-300);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.news-card.featured {
    grid-column: span 2;
    background: var(--gradient-light);
    border-color: var(--primary-200);
}

.news-badge {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    padding: 0.25rem 0.75rem;
    background: var(--gradient-primary);
    color: var(--text-white);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
}

.news-date {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.news-date i {
    color: var(--primary-500);
}

.news-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.news-card.featured .news-title {
    font-size: 1.375rem;
}

.news-excerpt {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.news-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--primary-600);
    transition: all var(--transition);
}

.news-link:hover {
    color: var(--primary-800);
    gap: var(--spacing-md);
}

/* ----- 常见问题区 ----- */
.faq {
    padding: 100px 0;
    background: var(--bg-light);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.faq-item {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}

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

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg) var(--spacing-xl);
    cursor: pointer;
    font-size: 1.0625rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: all var(--transition);
}

.faq-question:hover {
    color: var(--primary-600);
}

.faq-question i {
    font-size: 0.875rem;
    color: var(--primary-500);
    transition: transform var(--transition);
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow), padding var(--transition);
}

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

.faq-answer p {
    padding: 0 var(--spacing-xl) var(--spacing-lg);
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ----- 用户评价区 ----- */
.reviews {
    padding: 100px 0;
    background: var(--bg-white);
}

.reviews-stats {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.stats-main {
    text-align: center;
}

.stats-score {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary-600);
    line-height: 1;
}

.stats-stars {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    color: var(--warning);
    font-size: 1.5rem;
    margin: var(--spacing-sm) 0;
}

.stats-count {
    font-size: 1rem;
    color: var(--text-muted);
}

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

.stats-tags .tag {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.375rem 0.875rem;
    background: var(--primary-50);
    color: var(--primary-700);
    font-size: 0.875rem;
    border-radius: var(--radius-full);
}

.stats-tags .tag i {
    font-size: 0.75rem;
    color: var(--success);
}

.reviews-carousel {
    position: relative;
    overflow: hidden;
    padding: 0 var(--spacing-xl);
}

.reviews-track {
    display: flex;
    gap: var(--spacing-xl);
    transition: transform var(--transition-slow);
}

.review-card {
    flex: 0 0 calc(33.333% - var(--spacing-lg));
    background: var(--bg-light);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}

.review-card:hover {
    background: var(--primary-50);
    transform: translateY(-4px);
}

.review-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.review-avatar {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    color: var(--text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.review-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.review-stars {
    display: flex;
    gap: 2px;
    color: var(--warning);
    font-size: 0.75rem;
}

.review-content {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
    font-style: italic;
}

.reviews-nav {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-2xl);
}

.review-btn {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    color: var(--text-secondary);
    border-radius: 50%;
    font-size: 1rem;
    transition: all var(--transition);
}

.review-btn:hover {
    background: var(--gradient-primary);
    color: var(--text-white);
}

/* ----- CTA区域 ----- */
.cta {
    padding: 80px 0;
    background: var(--gradient-cta);
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-title {
    font-family: var(--font-display);
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ----- 页脚 ----- */
.footer {
    background: var(--bg-dark);
    padding: 60px 0 0;
    color: var(--text-light);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--spacing-3xl);
    padding-bottom: var(--spacing-3xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: var(--spacing-md);
}

.footer-logo .logo-icon {
    width: 40px;
    height: 40px;
    background: transparent;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    overflow: hidden;
}

.footer-description {
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    max-width: 300px;
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    border-radius: var(--radius);
    font-size: 1.125rem;
    transition: all var(--transition);
}

.social-link:hover {
    background: var(--primary-600);
    color: var(--text-white);
    transform: translateY(-3px);
}

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

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

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

.footer-column a {
    font-size: 0.9375rem;
    color: var(--text-light);
    transition: all var(--transition);
}

.footer-column a:hover {
    color: var(--primary-400);
    padding-left: var(--spacing-sm);
}

.footer-bottom {
    padding: var(--spacing-xl) 0;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ----- 返回顶部按钮 ----- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    color: var(--text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition);
    z-index: var(--z-fixed);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

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

/* ----- 响应式设计 ----- */
@media screen and (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .news-card.featured {
        grid-column: span 2;
    }
    
    .review-card {
        flex: 0 0 calc(50% - var(--spacing-md));
    }
}

@media screen and (max-width: 900px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 400px;
        height: 100vh;
        background: var(--bg-white);
        box-shadow: var(--shadow-xl);
        padding: 100px var(--spacing-xl) var(--spacing-xl);
        transition: right var(--transition);
        z-index: var(--z-modal);
    }
    
    .nav-menu.show {
        right: 0;
    }
    
    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-lg);
    }
    
    .nav-link {
        font-size: 1.125rem;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .nav-close {
        display: block;
        position: absolute;
        top: 20px;
        right: 20px;
        font-size: 1.75rem;
    }
    
    .nav-cta {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1.125rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-xl);
    }
    
    .highlights-content {
        grid-template-columns: 1fr;
    }
    
    .audience-wrapper {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media screen and (max-width: 768px) {
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .news-card.featured {
        grid-column: span 1;
    }
    
    .review-card {
        flex: 0 0 100%;
    }
    
    .footer-links {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
    }
}

@media screen and (max-width: 576px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .cta-title {
        font-size: 1.75rem;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .reviews-carousel {
        padding: 0;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
    }
}

/* ----- 动画类 ----- */
.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.slide-up {
    animation: slideUp 0.6s ease forwards;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ----- 页面标题区域 ----- */
.page-header {
    padding: 120px 0 60px;
    background: var(--gradient-light);
    text-align: center;
}

.page-header-content {
    max-width: 800px;
    margin: 0 auto;
}

.page-badge {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: var(--gradient-primary);
    color: var(--text-white);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-md);
}

.page-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.page-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* ----- 页面内容区域 ----- */
.page-content {
    padding: 60px 0;
    background: var(--bg-white);
}

/* ----- 手册内容样式 ----- */
.manual-content {
    max-width: 900px;
    margin: 0 auto;
}

.manual-section {
    margin-bottom: var(--spacing-3xl);
}

.manual-section h2 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--primary-600);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.manual-section h2 i {
    font-size: 1.5rem;
}

.manual-item {
    background: var(--bg-light);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--primary-500);
}

.manual-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

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

/* ----- 指南内容样式 ----- */
.guide-content {
    max-width: 900px;
    margin: 0 auto;
}

.guide-step {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
    align-items: flex-start;
}

.step-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    color: var(--text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-display);
}

.step-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

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

.step-tips {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--primary-50);
    border-radius: var(--radius);
    margin-top: var(--spacing-md);
}

.step-tips i {
    color: var(--warning);
    margin-top: 2px;
}

.step-tips span {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: var(--spacing-md) 0;
}

.feature-list li {
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.feature-list li i {
    color: var(--success);
}

.guide-tips {
    background: var(--bg-light);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    margin: var(--spacing-3xl) 0;
}

.guide-tips h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.guide-tips h3 i {
    color: var(--warning);
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.tip-item {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
}

.tip-item i {
    font-size: 1.5rem;
    color: var(--primary-600);
    margin-bottom: var(--spacing-sm);
}

.tip-item h4 {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.tip-item p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.guide-cta {
    text-align: center;
    padding: var(--spacing-3xl) 0;
}

.guide-cta h3 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

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

/* ----- 联系页面样式 ----- */
.contact-content {
    max-width: 1000px;
    margin: 0 auto;
}

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

.contact-card {
    background: var(--bg-light);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition);
}

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

.contact-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    color: var(--text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto var(--spacing-lg);
}

.contact-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.contact-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.contact-info {
    background: var(--bg-light);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-3xl);
}

.contact-info h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

.info-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.info-item i {
    font-size: 1.5rem;
    color: var(--primary-600);
    margin-top: 4px;
}

.info-item h4 {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.info-item p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.contact-faq {
    text-align: center;
}

.contact-faq h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.contact-faq > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

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

.faq-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--bg-light);
    color: var(--primary-600);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.faq-link:hover {
    background: var(--primary-600);
    color: var(--text-white);
    transform: translateY(-2px);
}

/* ----- 法律内容样式 ----- */
.legal-content {
    max-width: 900px;
    margin: 0 auto;
}

.legal-section {
    margin-bottom: var(--spacing-3xl);
}

.legal-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-600);
    margin-bottom: var(--spacing-md);
}

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

.legal-section ul {
    list-style: none;
    padding-left: var(--spacing-lg);
    margin: var(--spacing-md) 0;
}

.legal-section ul li {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
    position: relative;
    padding-left: var(--spacing-lg);
}

.legal-section ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-500);
    font-weight: bold;
}

.legal-section ul li strong {
    color: var(--text-primary);
}

.legal-section a {
    color: var(--primary-600);
    text-decoration: underline;
}

.legal-section a:hover {
    color: var(--primary-800);
}

/* ----- 响应式调整 ----- */
@media screen and (max-width: 900px) {
    .contact-methods {
        grid-template-columns: 1fr;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .tips-grid {
        grid-template-columns: 1fr;
    }
    
    .guide-step {
        flex-direction: column;
    }
    
    .step-number {
        align-self: flex-start;
    }
}

@media screen and (max-width: 768px) {
    .page-title {
        font-size: 2rem;
    }
    
    .manual-section h2,
    .guide-tips h3,
    .contact-info h2,
    .contact-faq h2 {
        font-size: 1.25rem;
    }
}

/* ----- 文章内容样式 ----- */
.article-content {
    max-width: 900px;
    margin: 0 auto;
}

.article-body {
    background: var(--bg-white);
    padding: var(--spacing-3xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    line-height: 1.8;
}

.article-body > p:first-child {
    font-size: 1.125rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
}

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

.article-body h2 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--primary-600);
    margin: var(--spacing-2xl) 0 var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-100);
}

.article-body h3 {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: var(--spacing-xl) 0 var(--spacing-md);
}

.article-body ul,
.article-body ol {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-xl);
    color: var(--text-secondary);
}

.article-body ul li,
.article-body ol li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

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

.article-body a {
    color: var(--primary-600);
    text-decoration: underline;
    transition: color var(--transition);
}

.article-body a:hover {
    color: var(--primary-800);
}

.article-footer {
    margin-top: var(--spacing-3xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--gray-200);
    text-align: right;
}

.article-footer p {
    color: var(--text-muted);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-xs);
}

@media screen and (max-width: 768px) {
    .article-body {
        padding: var(--spacing-xl);
    }
    
    .article-body h2 {
        font-size: 1.5rem;
    }
    
    .article-body h3 {
        font-size: 1.25rem;
    }
}