/* 立即开始合作区域样式 */
.cooperation-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #2d4b8e 0%, #1e3a6f 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cooperation-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.cooperation-section .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

.cooperation-section .section-title {
    color: #fff;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    position: relative;
}

.cooperation-section .section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: #f4821f;
}

.cooperation-section .section-subtitle {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.2rem;
    margin-bottom: 50px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.cooperation-button {
    display: inline-block;
    background-color: #f4821f;
    color: #fff;
    padding: 1.2rem 3rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 5px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(244, 130, 31, 0.3);
    position: relative;
    overflow: hidden;
}

.cooperation-button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.cooperation-button:hover {
    background-color: #ff9a4a;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(244, 130, 31, 0.4);
}

.cooperation-button:hover::before {
    width: 300px;
    height: 300px;
}

.cooperation-button:active {
    transform: translateY(-1px);
    box-shadow: 0 3px 10px rgba(244, 130, 31, 0.3);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .cooperation-section {
        padding: 60px 0;
    }

    .cooperation-section .section-title {
        font-size: 2rem;
        margin-bottom: 15px;
    }

    .cooperation-section .section-subtitle {
        font-size: 1rem;
        margin-bottom: 40px;
        padding: 0 10px;
    }

    .cooperation-button {
        padding: 1rem 2.5rem;
        font-size: 1rem;
    }
}

@media (max-width: 576px) {
    .cooperation-section {
        padding: 50px 0;
    }

    .cooperation-section .section-title {
        font-size: 1.75rem;
    }

    .cooperation-section .section-subtitle {
        font-size: 0.95rem;
        margin-bottom: 30px;
    }

    .cooperation-button {
        padding: 0.9rem 2rem;
        font-size: 0.95rem;
    }
}