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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h2 {
    color: #6366f1;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a:hover {
    color: #6366f1;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #6366f1;
    transition: width 0.3s ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

/* 主要区块样式 */
section {
    padding: 100px 0;
    position: relative;
}

/* 首页英雄区块 */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="2" fill="%23ffffff" opacity="0.1"/></svg>') repeat;
    animation: float 20s ease-in-out infinite;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 1s ease-out;
}

.hero-illustration {
    margin-top: 3rem;
    animation: fadeInUp 1s ease-out 0.3s both;
}

.hero-image {
    max-width: 300px;
    height: auto;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.3));
    animation: float 6s ease-in-out infinite;
}

/* 双标题区块 */
.two-titles-section {
    background: #f8fafc;
    position: relative;
}

.two-titles-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.content-item {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.content-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.content-item h3 {
    color: #1e293b;
    font-size: 1.8rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.content-item p {
    color: #64748b;
    font-size: 1.1rem;
    line-height: 1.7;
}

.section-illustration {
    text-align: center;
}

.section-image {
    max-width: 500px;
    height: auto;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.1));
}

/* 流程区块 */
.process-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.process-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 4rem;
    font-weight: 700;
}

.process-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.process-image {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.3));
}

.process-steps {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.1);
    padding: 1.5rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease;
}

.step:hover {
    transform: translateX(10px);
}

.step-number {
    background: #fbbf24;
    color: #1e293b;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.step p {
    font-size: 1.1rem;
    line-height: 1.6;
}

/* 重要文本区块 */
.important-text-section {
    background: #fef3c7;
    text-align: center;
}

.important-content h2 {
    font-size: 3rem;
    color: #92400e;
    margin-bottom: 3rem;
    font-weight: 700;
    line-height: 1.3;
}

.important-image {
    max-width: 400px;
    height: auto;
    filter: drop-shadow(0 10px 30px rgba(146, 64, 14, 0.2));
}

/* 标题子标题区块 */
.subtitles-section {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: white;
}

.subtitles-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 4rem;
    font-weight: 700;
}

.subtitles-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.subtitle-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease;
}

.subtitle-item:hover {
    transform: translateY(-5px);
}

.subtitle-item h4 {
    color: #fbbf24;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.subtitle-item p {
    line-height: 1.6;
    opacity: 0.9;
}

/* 插图文本区块 */
.illustrations-section {
    background: white;
}

.illustrations-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 4rem;
    color: #1e293b;
    font-weight: 700;
}

.illustrations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.illustration-item {
    text-align: center;
    background: #f8fafc;
    padding: 2rem;
    border-radius: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.illustration-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.illustration-item img {
    width: 120px;
    height: 120px;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 5px 15px rgba(0, 0, 0, 0.1));
}

.illustration-item p {
    color: #64748b;
    line-height: 1.6;
}

/* 文本插图区块 */
.text-illustration-section {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

.text-illustration-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.text-content h2 {
    font-size: 2.2rem;
    color: #0f172a;
    line-height: 1.4;
    font-weight: 600;
}

.text-illustration-image {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.1));
}

/* 数据指标区块 */
.metrics-section {
    background: white;
}

.metrics-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 4rem;
    color: #1e293b;
    font-weight: 700;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.metric-item {
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem 2rem;
    border-radius: 20px;
    transition: transform 0.3s ease;
}

.metric-item:hover {
    transform: scale(1.05);
}

.metric-number {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.metric-item p {
    font-size: 1.1rem;
    opacity: 0.9;
    line-height: 1.5;
}

/* 问题区块 */
.questions-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.questions-content h2 {
    font-size: 3rem;
    margin-bottom: 3rem;
    font-weight: 700;
}

.questions-image {
    max-width: 600px;
    height: auto;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.3));
}

/* 感谢区块 */
.thank-you-section {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    color: white;
    text-align: center;
}

.thank-you-content h1 {
    font-size: 4rem;
    margin-bottom: 2rem;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.contact-info {
    margin-bottom: 3rem;
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.contact-info p {
    font-size: 1.2rem;
    opacity: 0.9;
}

.thank-you-image {
    max-width: 400px;
    height: auto;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.3));
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .two-titles-content,
    .process-content,
    .text-illustration-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .content-item {
        padding: 1.5rem;
    }
    
    .important-content h2 {
        font-size: 2rem;
    }
    
    .thank-you-content h1 {
        font-size: 2.5rem;
    }
    
    .metric-number {
        font-size: 3rem;
    }
    
    section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .illustrations-grid {
        grid-template-columns: 1fr;
    }
    
    .metrics-grid {
        grid-template-columns: 1fr;
    }
}

/* 滚动行为 */
html {
    scroll-behavior: smooth;
}

/* 可访问性增强 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}