/* 智能折叠器样式 */
.smart-accordion {
    display: flex;
    width: 100%;
    height: 100%;
    gap: 10px;
    font-family: 'Microsoft YaHei', 'PingFang SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.smart-accordion-item {
    position: relative;
    flex: 0 0 15%;
    height: 350px;
    border-radius: 15px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.3);
}

.smart-accordion-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(99, 102, 241, 0.4);
}

.smart-accordion-item.expanded {
    flex: 0 0 45%;
    box-shadow: 0 16px 48px rgba(99, 102, 241, 0.5);
}

.smart-accordion-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(255,255,255,0.15) 0%, 
        rgba(255,255,255,0.05) 50%, 
        rgba(0,0,0,0.05) 100%);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: inherit;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.smart-accordion-item:hover::before {
    opacity: 1;
}

.accordion-content {
    position: relative;
    z-index: 2;
    height: 100%;
    padding: 30px 25px;
    display: flex;
    flex-direction: column;
    color: white;
}

.accordion-header {
    margin-bottom: 20px;
    position: relative;
}

.accordion-icon {
    font-size: 48px;
    margin-bottom: 20px;
    opacity: 0.9;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.2));
    transition: all 0.3s ease;
}

.smart-accordion-item:hover .accordion-icon {
    transform: scale(1.1);
    opacity: 1;
}

.accordion-title {
    font-size: 24px;
    font-weight: 600;
    margin: 0 0 8px 0;
    line-height: 1.2;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.accordion-subtitle {
    font-size: 16px;
    margin: 0;
    opacity: 0.85;
    font-weight: 400;
    text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.accordion-body {
    flex: 1;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    transition-delay: 0.1s;
    font-size: 15px;
    line-height: 1.8;
    text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.smart-accordion-item.expanded .accordion-body {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.3s;
}

.accordion-body p {
    margin-bottom: 12px;
}

.accordion-body ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.accordion-body li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    position: relative;
    padding-left: 20px;
}

.accordion-body li:last-child {
    border-bottom: none;
}

.accordion-body li::before {
    content: '▶';
    position: absolute;
    left: 0;
    top: 8px;
    font-size: 12px;
    opacity: 0.7;
}

/* 收缩状态下的标题样式 */
.smart-accordion-item:not(.expanded) .accordion-content {
    justify-content: center;
    align-items: center;
    text-align: center;
}

.smart-accordion-item:not(.expanded) .accordion-title {
    writing-mode: vertical-lr;
    text-orientation: mixed;
    transform: rotate(180deg);
    font-size: 20px;
    white-space: nowrap;
    letter-spacing: 2px;
}

.smart-accordion-item:not(.expanded) .accordion-subtitle,
.smart-accordion-item:not(.expanded) .accordion-icon {
    display: none;
}

/* 动画效果增强 */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.smart-accordion-item.expanded .accordion-body > * {
    animation: slideIn 0.6s ease-out;
    animation-fill-mode: both;
}

.smart-accordion-item.expanded .accordion-body > *:nth-child(1) { animation-delay: 0.1s; }
.smart-accordion-item.expanded .accordion-body > *:nth-child(2) { animation-delay: 0.2s; }
.smart-accordion-item.expanded .accordion-body > *:nth-child(3) { animation-delay: 0.3s; }
.smart-accordion-item.expanded .accordion-body > *:nth-child(4) { animation-delay: 0.4s; }
.smart-accordion-item.expanded .accordion-body > *:nth-child(5) { animation-delay: 0.5s; }

/* 背景渐变动画 */
.smart-accordion-item {
    background-size: 200% 200%;
    animation: gradientShift 8s ease infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.smart-accordion-item.expanded {
    animation-duration: 4s;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .smart-accordion-item {
        flex: 0 0 18%;
    }
    
    .smart-accordion-item.expanded {
        flex: 0 0 50%;
    }
    
    .accordion-title {
        font-size: 22px;
    }
    
    .accordion-icon {
        font-size: 42px;
    }
}

@media (max-width: 992px) {
    .smart-accordion {
        flex-direction: column;
        height: auto;
        gap: 15px;
    }
    
    .smart-accordion-item {
        flex: none;
        height: 120px;
        width: 100%;
    }
    
    .smart-accordion-item.expanded {
        height: 400px;
        flex: none;
    }
    
    .smart-accordion-item:not(.expanded) .accordion-content {
        flex-direction: row;
        align-items: center;
        justify-content: flex-start;
        text-align: left;
        padding: 20px 25px;
    }
    
    .smart-accordion-item:not(.expanded) .accordion-title {
        writing-mode: initial;
        text-orientation: initial;
        transform: none;
        font-size: 20px;
        letter-spacing: normal;
        white-space: normal;
        margin-left: 15px;
    }
    
    .smart-accordion-item:not(.expanded) .accordion-subtitle {
        display: block;
        margin-left: 15px;
        margin-top: 5px;
    }
    
    .smart-accordion-item:not(.expanded) .accordion-icon {
        display: block;
        font-size: 36px;
        margin: 0;
    }
    
    .accordion-content {
        padding: 25px;
    }
}

@media (max-width: 576px) {
    .smart-accordion-item {
        height: 100px;
    }
    
    .smart-accordion-item.expanded {
        height: 350px;
    }
    
    .accordion-content {
        padding: 20px;
    }
    
    .accordion-title {
        font-size: 18px;
    }
    
    .accordion-subtitle {
        font-size: 14px;
    }
    
    .accordion-body {
        font-size: 14px;
        line-height: 1.6;
    }
    
    .smart-accordion-item:not(.expanded) .accordion-icon {
        font-size: 28px;
    }
    
    .smart-accordion-item:not(.expanded) .accordion-title {
        font-size: 16px;
    }
}