/* 英雄区域样式 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 100px 0;
    text-align: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-content p {
    font-size: 1.3rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    background: #e74c3c;
    color: white;
    padding: 15px 30px;
    text-decoration: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
}

.cta-button:hover {
    background: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.4);
}

.cta-button i {
    margin-right: 10px;
}

.hero-image {
    margin-top: 50px;
}

.file-icons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.file-icon {
    width: 80px;
    height: 80px;
    background: rgba(255,255,255,0.1);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    transition: all 0.3s ease;
    animation: float 3s ease-in-out infinite;
}

.file-icon:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-5px);
}

.file-icon.pdf { color: #e74c3c; animation-delay: 0s; }
.file-icon.word { color: #2980b9; animation-delay: 0.5s; }
.file-icon.excel { color: #27ae60; animation-delay: 1s; }
.file-icon.image { color: #f39c12; animation-delay: 1.5s; }
.file-icon.video { color: #9b59b6; animation-delay: 2s; }
.file-icon.audio { color: #e67e22; animation-delay: 2.5s; }

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

/* 转换步骤样式 */
.steps {
    padding: 80px 0;
    background: #fff;
}

.steps h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #2c3e50;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.step {
    text-align: center;
    padding: 30px;
    border-radius: 15px;
    background: #f8f9fa;
    transition: all 0.3s ease;
    position: relative;
}

.step:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.step-number {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: #3498db;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
}

.step-icon {
    font-size: 3rem;
    color: #3498db;
    margin: 20px 0;
}

.step h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.step p {
    color: #7f8c8d;
    line-height: 1.6;
}

/* 热门转换样式 */
.popular-conversions {
    padding: 80px 0;
    background: #f8f9fa;
}

.popular-conversions h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #2c3e50;
}

.conversions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.conversion-card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.conversion-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.conversion-icons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
    font-size: 2rem;
}

.conversion-icons i:first-child {
    color: #e74c3c;
}

.conversion-icons i:last-child {
    color: #27ae60;
}

.conversion-icons .fa-arrow-right {
    color: #3498db;
    font-size: 1.5rem;
}

.conversion-card h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.conversion-card p {
    color: #7f8c8d;
    margin-bottom: 20px;
    line-height: 1.6;
}

.conversion-link {
    display: inline-block;
    background: #3498db;
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.conversion-link:hover {
    background: #2980b9;
    transform: translateY(-2px);
}

/* 特色功能样式 */
.features {
    padding: 80px 0;
    background: #fff;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #2c3e50;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.feature {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 20px;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.feature:hover {
    background: #f8f9fa;
    transform: translateX(10px);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.feature-content h3 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 1.3rem;
}

.feature-content p {
    color: #7f8c8d;
    line-height: 1.6;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }

    .file-icons {
        gap: 15px;
    }

    .file-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }

    .steps-grid,
    .conversions-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }

    .feature {
        flex-direction: column;
        text-align: center;
    }
}