/* 高校合作专区样式 */

.hero-university {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 20px 80px;
    text-align: center;
    position: relative;
    z-index: 10;
}

/* 高校难题区域 */
.challenges-section {
    padding: 100px 20px;
    position: relative;
    z-index: 10;
}

.challenges-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.challenge-card {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.3) 0%, rgba(59, 130, 246, 0.2) 100%);
    backdrop-filter: blur(20px);
    border: 2px solid rgba(96, 165, 250, 0.4);
    border-radius: 18px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
}

.challenge-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, #ef4444, #f87171, #ef4444, transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.challenge-card:hover::before {
    opacity: 1;
}

.challenge-card:hover {
    transform: translateY(-8px);
    border-color: rgba(239, 68, 68, 0.6);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.4) 0%, rgba(96, 165, 250, 0.3) 100%);
    box-shadow: 0 12px 32px rgba(239, 68, 68, 0.3);
}

.challenge-icon {
    font-size: 64px;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 20px rgba(239, 68, 68, 0.5));
}

.challenge-card h3 {
    font-size: 22px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 16px;
    line-height: 1.4;
}

.challenge-card > p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    margin-bottom: 20px;
}

.challenge-impact {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 12px;
    padding: 12px 16px;
    text-align: left;
}

.impact-label {
    font-size: 13px;
    font-weight: 600;
    color: #ef4444;
    display: block;
    margin-bottom: 6px;
}

.impact-text {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.5;
}

/* 解决方案区域 */
.solutions-section {
    padding: 100px 20px;
    position: relative;
    z-index: 10;
    background: rgba(10, 26, 40, 0.3);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.solution-card {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.4) 0%, rgba(59, 130, 246, 0.25) 100%);
    backdrop-filter: blur(20px);
    border: 3px solid rgba(96, 165, 250, 0.8);
    border-radius: 18px;
    padding: 40px 30px;
    position: relative;
    transition: all 0.4s;
    overflow: hidden;
}

.solution-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, transparent, #60a5fa, #93c5fd, #60a5fa, transparent);
    animation: shimmer 2.5s ease-in-out infinite;
}

.solution-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 0 80px rgba(96, 165, 250, 0.8), 0 16px 60px rgba(96, 165, 250, 0.4);
    border-color: rgba(147, 197, 253, 1);
}

.solution-number {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 48px;
    font-weight: 900;
    background: linear-gradient(135deg, rgba(96, 165, 250, 0.35) 0%, rgba(147, 197, 253, 0.15) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.solution-icon {
    font-size: 48px;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 30px rgba(96, 165, 250, 0.9));
}

.solution-card h3 {
    font-size: 28px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 12px;
    text-shadow: 0 2px 15px rgba(96, 165, 250, 0.5);
}

.solution-highlight {
    font-size: 16px;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 16px;
    display: block;
    line-height: 1.4;
}

.solution-detail {
    margin-bottom: 20px;
}

.solution-detail p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.6;
}

.solution-benefits {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.benefit-point {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.9);
    padding: 8px 12px;
    background: rgba(96, 165, 250, 0.15);
    border: 1px solid rgba(96, 165, 250, 0.3);
    border-radius: 8px;
    transition: all 0.3s;
}

.benefit-point:hover {
    background: rgba(96, 165, 250, 0.25);
    border-color: rgba(96, 165, 250, 0.5);
    transform: translateX(4px);
}

/* 合作方式区域 */
.cooperation-section {
    padding: 100px 20px;
    position: relative;
    z-index: 10;
}

.cooperation-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.cooperation-card {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.3) 0%, rgba(59, 130, 246, 0.2) 100%);
    backdrop-filter: blur(20px);
    border: 2px solid rgba(96, 165, 250, 0.5);
    border-radius: 18px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
}

.cooperation-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, #60a5fa, #93c5fd, #60a5fa, transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.cooperation-card:hover::before {
    opacity: 1;
    animation: shimmer 2s ease-in-out infinite;
}

.cooperation-card:hover {
    transform: translateY(-8px);
    border-color: rgba(96, 165, 250, 0.8);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.4) 0%, rgba(96, 165, 250, 0.3) 100%);
    box-shadow: 0 12px 40px rgba(96, 165, 250, 0.5);
}

.cooperation-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, var(--color-accent) 0%, #93c5fd 100%);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(96, 165, 250, 0.4);
}

.cooperation-icon {
    font-size: 64px;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 30px rgba(96, 165, 250, 0.8));
}

.cooperation-card h3 {
    font-size: 24px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 12px;
    text-shadow: 0 2px 10px rgba(96, 165, 250, 0.4);
}

.cooperation-intro {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 24px;
    line-height: 1.5;
}

.cooperation-process {
    background: rgba(96, 165, 250, 0.1);
    border: 1px solid rgba(96, 165, 250, 0.3);
    border-radius: 12px;
    padding: 20px 16px;
    margin-bottom: 20px;
    text-align: left;
}

.process-step-mini {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
}

.process-step-mini:last-child {
    margin-bottom: 0;
}

.step-num {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--color-accent) 0%, #93c5fd 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.step-text {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.5;
    flex: 1;
}

.cooperation-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
}

.cooperation-cta {
    text-align: center;
    margin-top: 50px;
}

.btn-contact {
    padding: 16px 64px;
    background: linear-gradient(135deg, var(--color-accent) 0%, #93c5fd 100%);
    color: white;
    border: none;
    border-radius: 32px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 6px 24px rgba(96, 165, 250, 0.5);
}

.btn-contact:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 12px 40px rgba(96, 165, 250, 0.8);
}

/* 合作案例区域 */
.cases-section {
    padding: 100px 20px 120px;
    position: relative;
    z-index: 10;
    background: rgba(10, 26, 40, 0.3);
}

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

.case-placeholder {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.3) 0%, rgba(59, 130, 246, 0.2) 100%);
    backdrop-filter: blur(20px);
    border: 2px solid rgba(96, 165, 250, 0.5);
    border-radius: 18px;
    padding: 60px 40px;
    text-align: center;
}

.placeholder-icon {
    font-size: 80px;
    margin-bottom: 24px;
    filter: drop-shadow(0 0 30px rgba(96, 165, 250, 0.6));
}

.case-placeholder p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 12px;
}

.placeholder-sub {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0;
}

/* 表单样式增强 */
.modal-form select {
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(96, 165, 250, 0.3);
    border-radius: 12px;
    color: white;
    font-size: 15px;
    font-family: inherit;
    transition: all 0.3s;
    cursor: pointer;
}

.modal-form select:focus {
    outline: none;
    border-color: var(--color-accent);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.2);
}

.modal-form select option {
    background: #1a1b2f;
    color: white;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .challenges-grid,
    .solutions-grid,
    .cooperation-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .challenges-grid,
    .solutions-grid,
    .cooperation-grid {
        grid-template-columns: 1fr;
    }
    
    .challenge-card,
    .solution-card,
    .cooperation-card {
        padding: 30px 20px;
    }
    
    .case-placeholder {
        padding: 40px 30px;
    }
}