/* 设计理念页面专用样式 */

/* 封面区域 */
.design-hero {
    background: linear-gradient(135deg, #660874 0%, #8B5A96 50%, #E6E6FA 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.design-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(230,230,250,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.design-title {
    font-size: 4rem;
    font-weight: bold;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    margin-bottom: 1rem;
    animation: titleSlideIn 1s ease-out forwards;
}

.design-subtitle {
    font-size: 1.5rem;
    color: #E6E6FA;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease-out 0.3s forwards;
    opacity: 0;
    transform: translateY(20px);
}

.scroll-hint {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    color: #E6E6FA;
    font-size: 2rem;
    animation: bounce 2s ease-in-out infinite;
}

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

/* 设计起源区域 */
.design-origin {
    padding: 5rem 0;
    background: #f8f9fa;
}

.origin-content h2 {
    color: #660874;
    font-weight: bold;
    margin-bottom: 2rem;
    font-size: 2.5rem;
}

.origin-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #666;
    margin-bottom: 1.5rem;
}

.timeline-item {
    display: flex;
    align-items: center;
    margin: 1rem 0;
    padding: 1rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.timeline-item:hover {
    transform: translateX(10px);
    box-shadow: 0 10px 25px rgba(102, 8, 116, 0.2);
}

.timeline-item .year {
    background: #660874;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: bold;
    margin-right: 1rem;
    min-width: 80px;
    text-align: center;
}

.timeline-item .event {
    color: #333;
    font-weight: 500;
}

.origin-image {
    text-align: center;
}

.image-placeholder {
    background: linear-gradient(135deg, #660874, #8B5A96);
    border-radius: 15px;
    padding: 3rem;
    color: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.image-placeholder i {
    font-size: 4rem;
    margin-bottom: 1rem;
    color: #E6E6FA;
}

.image-placeholder p {
    font-size: 1.2rem;
    margin: 0;
}

/* 空间结构区域 */
.space-structure {
    padding: 5rem 0;
    background: white;
}

.space-structure h2 {
    color: #660874;
    font-weight: bold;
    margin-bottom: 1rem;
}

.space-structure p {
    color: #666;
    font-size: 1.1rem;
}

.structure-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 2px solid transparent;
    height: 100%;
}

.structure-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(102, 8, 116, 0.2);
    border-color: #8B5A96;
}

.card-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #660874, #8B5A96);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    transition: all 0.3s ease;
}

.structure-card:hover .card-icon {
    transform: scale(1.1);
    background: linear-gradient(135deg, #DC143C, #FFD700);
}

.card-icon i {
    font-size: 2rem;
    color: white;
}

.structure-card h3 {
    color: #8B0000;
    font-weight: bold;
    margin-bottom: 1rem;
}

.structure-card p {
    color: #666;
    line-height: 1.6;
}

/* 设计流程区域 */
.design-process {
    padding: 5rem 0;
    background: #f8f9fa;
}

.process-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.process-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, #8B0000, #DC143C, #FFD700);
    transform: translateX(-50%);
}

.process-step {
    display: flex;
    align-items: center;
    margin: 3rem 0;
    position: relative;
}

.process-step:nth-child(odd) {
    flex-direction: row;
}

.process-step:nth-child(even) {
    flex-direction: row-reverse;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #8B0000, #DC143C);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 1.2rem;
    z-index: 2;
    box-shadow: 0 5px 15px rgba(139, 0, 0, 0.3);
}

.step-content {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin: 0 2rem;
    flex: 1;
    transition: all 0.3s ease;
}

.step-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(139, 0, 0, 0.2);
}

.step-content h4 {
    color: #8B0000;
    font-weight: bold;
    margin-bottom: 1rem;
}

.step-content p {
    color: #666;
    line-height: 1.6;
}

/* 关键词云区域 */
.keywords-section {
    padding: 5rem 0;
    background: white;
}

.keywords-cloud {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

.keyword {
    background: linear-gradient(135deg, #8B0000, #DC143C);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
    animation: keywordFloat 3s ease-in-out infinite;
}

.keyword:nth-child(1) { animation-delay: 0s; }
.keyword:nth-child(2) { animation-delay: 0.3s; }
.keyword:nth-child(3) { animation-delay: 0.6s; }
.keyword:nth-child(4) { animation-delay: 0.9s; }
.keyword:nth-child(5) { animation-delay: 1.2s; }
.keyword:nth-child(6) { animation-delay: 1.5s; }
.keyword:nth-child(7) { animation-delay: 1.8s; }
.keyword:nth-child(8) { animation-delay: 2.1s; }
.keyword:nth-child(9) { animation-delay: 2.4s; }
.keyword:nth-child(10) { animation-delay: 2.7s; }

.keyword:hover {
    transform: scale(1.1);
    box-shadow: 0 5px 15px rgba(139, 0, 0, 0.3);
    background: linear-gradient(135deg, #DC143C, #FFD700);
}

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

/* 底部导航 */
.bottom-nav {
    padding: 3rem 0;
    background: linear-gradient(135deg, #8B0000, #DC143C);
    text-align: center;
}

.bottom-nav .btn {
    background: #FFD700 !important;
    border: 2px solid #FFD700 !important;
    color: #8B0000 !important;
    font-weight: bold;
    padding: 1rem 2rem;
    border-radius: 50px;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.bottom-nav .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    background: #8B0000 !important;
    color: #FFD700 !important;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .design-title {
        font-size: 2.5rem;
    }
    
    .design-subtitle {
        font-size: 1.2rem;
    }
    
    .process-timeline::before {
        left: 20px;
    }
    
    .process-step {
        flex-direction: column !important;
        text-align: center;
    }
    
    .step-content {
        margin: 1rem 0 0 0;
        width: 100%;
    }
    
    .keywords-cloud {
        gap: 0.5rem;
    }
    
    .keyword {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 576px) {
    .design-title {
        font-size: 2rem;
    }
    
    .origin-content h2 {
        font-size: 2rem;
    }
    
    .structure-card {
        margin-bottom: 2rem;
    }
}