* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Roboto', sans-serif;
}

body {
    background-color: #ffffff;
    color: #333;
    line-height: 1.6;
}

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

header {
    position: relative;
    padding: 100px 0 80px;
    overflow: hidden;
}

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

.dot {
    position: absolute;
    border-radius: 50%;
    opacity: 0.9;
}

.line {
    position: absolute;
    height: 6px;
    border-radius: 3px;
    opacity: 0.9;
}

/* 黄色元素 */
.yellow-dot-1 {
    width: 16px;
    height: 16px;
    background-color: #FFC107;
    top: 70px;
    left: 70px;
}

.yellow-line {
    width: 100px;
    background-color: #FFC107;
    top: 76px;
    left: 90px;
}

.yellow-dot-2 {
    width: 10px;
    height: 10px;
    background-color: #FFC107;
    top: 74px;
    left: 200px;
}

.yellow-dot-3 {
    width: 14px;
    height: 14px;
    background-color: #FFC107;
    top: 40px;
    left: 260px;
}

/* 绿色元素 */
.green-dot-1 {
    width: 18px;
    height: 18px;
    background-color: #4CAF50;
    top: 130px;
    left: 50px;
}

.green-line {
    width: 80px;
    background-color: #4CAF50;
    top: 137px;
    left: 70px;
}

.green-dot-2 {
    width: 12px;
    height: 12px;
    background-color: #4CAF50;
    top: 100px;
    left: 200px;
}

/* 蓝色元素 */
.blue-dot-1 {
    width: 14px;
    height: 14px;
    background-color: #4285F4;
    top: 60px;
    left: 460px;
}

.blue-line {
    width: 120px;
    background-color: #4285F4;
    top: 65px;
    left: 480px;
    transform: rotate(-10deg);
}

.blue-dot-2 {
    width: 10px;
    height: 10px;
    background-color: #4285F4;
    top: 55px;
    left: 590px;
}

.blue-dot-3 {
    width: 16px;
    height: 16px;
    background-color: #4285F4;
    top: 120px;
    left: 700px;
}

.header-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
}

.subtitle {
    font-size: 14px;
    color: #666;
    margin-bottom: 16px;
    font-weight: 400;
}

h1 {
    font-size: 48px;
    font-weight: 500;
    margin-bottom: 24px;
    color: #202124;
    letter-spacing: -0.5px;
}

.intro {
    font-size: 18px;
    color: #5f6368;
    margin-bottom: 24px;
    max-width: 700px;
    font-weight: 300;
    line-height: 1.7;
}

.explore {
    font-size: 16px;
    color: #666;
    margin-top: 40px;
    font-weight: 300;
}

main {
    padding: 40px 0 80px;
}

.case-study {
    margin-bottom: 80px;
}

.category {
    display: inline-block;
    font-size: 14px;
    color: #666;
    margin-bottom: 16px;
    text-transform: lowercase;
    font-weight: 400;
}

.divider {
    height: 3px;
    width: 100%;
    background: linear-gradient(to right, #ff9800, #4caf50, #2196f3);
    margin-bottom: 32px;
    opacity: 0.7;
}

.case-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.case-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.case-details h2 {
    font-size: 28px;
    margin-bottom: 20px;
    color: #202124;
    font-weight: 400;
    line-height: 1.4;
}

.case-details p {
    margin-bottom: 24px;
    color: #5f6368;
    font-weight: 300;
    line-height: 1.7;
}

.learn-more {
    display: inline-block;
    color: #4285F4;
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    letter-spacing: 1px;
}

.learn-more::after {
    content: " →";
    margin-left: 4px;
}

.learn-more:hover {
    text-decoration: underline;
}

footer {
    padding: 40px 0;
    text-align: center;
    color: #666;
    font-size: 14px;
    font-weight: 300;
}

@media (max-width: 992px) {
    .case-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .header-content {
        padding: 0 20px;
    }
    
    h1 {
        font-size: 36px;
    }
    
    .intro {
        font-size: 16px;
    }
}

@media (max-width: 768px) {
    header {
        padding: 80px 0 60px;
    }
    
    .header-graphics {
        opacity: 0.5;
    }
    
    h1 {
        font-size: 32px;
    }
}