/**
 * CRCAI About Page Styles
 * 关于我们页面专用样式
 */

/* ==========================================================================
   0. Common Styles & Buttons
   ========================================================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--primary-blue);
    margin-bottom: 12px;
}

.section-label::before,
.section-label::after {
    content: '';
    width: 24px;
    height: 1px;
    background: var(--primary-blue);
    opacity: 0.4;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.section-desc {
    font-size: 18px;
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Buttons */
.tesla-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.tesla-btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--tech-blue));
    color: white;
    box-shadow: 0 4px 16px rgba(0, 104, 181, 0.3);
}

.tesla-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 104, 181, 0.4);
}

.tesla-btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.tesla-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

.btn-cta-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-cta-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 104, 181, 0.3);
}

.btn-cta-secondary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    background: transparent;
    border: 2px solid;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-cta-secondary:hover {
    transform: translateY(-2px);
}

/* ==========================================================================
   1. About Hero
   ========================================================================== */
.about-hero {
    min-height: 60vh;
    position: relative;
    display: flex;
    align-items: center;
    background: radial-gradient(ellipse at center, #0a1628 0%, #000000 100%);
    overflow: hidden;
    padding: 140px 0 100px;
    text-align: center;
}

.about-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        linear-gradient(90deg, transparent 49.5%, rgba(0, 128, 255, 0.08) 50%, transparent 50.5%),
        linear-gradient(0deg, transparent 49.5%, rgba(0, 128, 255, 0.04) 50%, transparent 50.5%);
    background-size: 80px 80px;
    opacity: 0.6;
}

.about-hero-content {
    position: relative;
    z-index: 10;
    max-width: 800px;
    margin: 0 auto;
    color: white;
}

.about-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(0, 104, 181, 0.2);
    border: 1px solid rgba(0, 104, 181, 0.4);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    color: var(--tech-blue);
    margin-bottom: var(--spacing-lg);
}

.about-hero-title {
    font-size: 64px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -2px;
}

.about-hero-desc {
    font-size: 20px;
    line-height: 1.8;
    opacity: 0.9;
    margin-bottom: var(--spacing-sm);
}

.about-hero-desc-secondary {
    font-size: 18px;
    line-height: 1.8;
    opacity: 0.7;
    margin-bottom: var(--spacing-xl);
}

.about-hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ==========================================================================
   2. Who We Are Section
   ========================================================================== */
.who-section {
    padding: var(--spacing-xxxl) 0;
    background: white;
}

.who-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.who-text {
    font-size: 20px;
    line-height: 2;
    color: var(--gray-700);
}

.who-text strong {
    color: var(--gray-900);
    font-weight: 600;
}

.who-highlight {
    display: inline-block;
    background: linear-gradient(135deg, rgba(0, 104, 181, 0.1), rgba(0, 104, 181, 0.05));
    padding: 2px 8px;
    border-radius: 4px;
    color: var(--primary-blue);
    font-weight: 600;
}

/* ==========================================================================
   3. Problems Section (Why Now)
   ========================================================================== */
.problems-section {
    padding: var(--spacing-xxxl) 0;
    background: var(--gray-100);
}

.problems-intro {
    max-width: 800px;
    margin: 0 auto var(--spacing-xxl);
    text-align: center;
}

.problems-intro-text {
    font-size: 18px;
    color: var(--gray-700);
    line-height: 1.8;
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xxl);
}

.problem-card {
    background: white;
    border-radius: 12px;
    padding: var(--spacing-xl);
    border-left: 4px solid var(--error-red);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    transition: all 0.3s ease;
}

.problem-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.problem-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #FFEBEE;
    border-radius: 10px;
    color: var(--error-red);
    margin-bottom: var(--spacing-md);
}

.problem-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.problem-desc {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.7;
}

.problems-conclusion {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    padding: var(--spacing-xl);
    background: white;
    border-radius: 12px;
    border: 2px solid var(--primary-blue);
}

.problems-conclusion-text {
    font-size: 18px;
    color: var(--gray-800);
    line-height: 1.8;
    font-weight: 500;
}

/* ==========================================================================
   4. Solutions Section (Four Components)
   ========================================================================== */
.solutions-section {
    padding: var(--spacing-xxxl) 0;
    background: white;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.solution-card {
    background: var(--gray-50);
    border-radius: 16px;
    padding: var(--spacing-xl);
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.solution-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
}

.solution-card.blue::before { background: var(--primary-blue); }
.solution-card.green::before { background: var(--success-green); }
.solution-card.red::before { background: var(--error-red); }
.solution-card.cyan::before { background: var(--info-cyan); }

.solution-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.1);
}

.solution-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.solution-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
}

.solution-card.blue .solution-icon { background: var(--light-blue); color: var(--primary-blue); }
.solution-card.green .solution-icon { background: #E8F5E9; color: var(--success-green); }
.solution-card.red .solution-icon { background: #FFEBEE; color: var(--error-red); }
.solution-card.cyan .solution-icon { background: #E0F7FA; color: var(--info-cyan); }

.solution-meta {
    flex: 1;
}

.solution-name {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.solution-subtitle {
    font-size: 14px;
    color: var(--gray-500);
    font-weight: 500;
}

.solution-desc {
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.solution-tagline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: white;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-800);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.solution-card.blue .solution-tagline { color: var(--primary-blue); }
.solution-card.green .solution-tagline { color: var(--success-green); }
.solution-card.red .solution-tagline { color: var(--error-red); }
.solution-card.cyan .solution-tagline { color: var(--info-cyan); }

/* ==========================================================================
   5. Differentiator Section
   ========================================================================== */
.diff-section {
    padding: var(--spacing-xxxl) 0;
    background: linear-gradient(135deg, var(--deep-blue) 0%, #0a1628 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.diff-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 128, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(0, 128, 255, 0.1) 0%, transparent 50%);
}

.diff-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.diff-label {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--tech-blue);
    margin-bottom: var(--spacing-md);
}

.diff-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.diff-text {
    font-size: 20px;
    line-height: 1.9;
    opacity: 0.9;
    margin-bottom: var(--spacing-lg);
}

.diff-highlight {
    color: var(--tech-blue);
    font-weight: 600;
}

.diff-emphasis {
    display: inline-block;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    font-size: 18px;
    font-weight: 500;
    margin-top: var(--spacing-md);
}

/* ==========================================================================
   6. Values Section
   ========================================================================== */
.values-section {
    padding: var(--spacing-xxxl) 0;
    background: white;
}

.values-list {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-lg);
}

.value-card {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--gray-50);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.value-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 104, 181, 0.1);
    background: white;
    border: 1px solid var(--primary-blue);
}

.value-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-blue);
    border-radius: 16px;
    color: var(--primary-blue);
}

.value-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.value-desc {
    font-size: 13px;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ==========================================================================
   7. Process Section (How We Work)
   ========================================================================== */
.process-section {
    padding: var(--spacing-xxxl) 0;
    background: var(--gray-100);
}

.process-intro {
    max-width: 700px;
    margin: 0 auto var(--spacing-xxl);
    text-align: center;
}

.process-intro-text {
    font-size: 18px;
    color: var(--gray-700);
    line-height: 1.8;
}

.process-timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.process-timeline::before {
    content: '';
    position: absolute;
    left: 32px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary-blue), var(--success-green));
}

.process-step {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    position: relative;
}

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

.process-number {
    width: 64px;
    height: 64px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-blue);
    color: white;
    font-size: 24px;
    font-weight: 700;
    border-radius: 50%;
    position: relative;
    z-index: 2;
    box-shadow: 0 4px 16px rgba(0, 104, 181, 0.3);
}

.process-step:nth-child(2) .process-number { background: #1976D2; }
.process-step:nth-child(3) .process-number { background: #0097A7; }
.process-step:nth-child(4) .process-number { background: #00897B; }
.process-step:nth-child(5) .process-number { background: var(--success-green); }

.process-content {
    flex: 1;
    background: white;
    border-radius: 12px;
    padding: var(--spacing-lg);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.process-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.process-desc {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.7;
}

/* ==========================================================================
   8. Contact Section
   ========================================================================== */
.contact-section {
    padding: var(--spacing-xxxl) 0;
    background: white;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
}

.contact-info h3 {
    font-size: 32px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-lg);
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: 8px;
    transition: all 0.2s;
}

.contact-item:hover {
    background: var(--light-blue);
}

.contact-item i {
    color: var(--primary-blue);
    flex-shrink: 0;
}

.contact-item-label {
    font-size: 12px;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 2px;
}

.contact-item-value {
    font-size: 16px;
    color: var(--gray-900);
    font-weight: 500;
}

.contact-cta {
    background: var(--gray-100);
    border-radius: 16px;
    padding: var(--spacing-xxl);
    text-align: center;
}

.contact-cta h4 {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.contact-cta p {
    font-size: 16px;
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
}

.contact-cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ==========================================================================
   9. Responsive
   ========================================================================== */
@media (max-width: 1200px) {
    .values-list {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 968px) {
    .about-hero {
        padding: 120px 0 80px;
    }
    
    .about-hero-title {
        font-size: 48px;
    }
    
    .problems-grid {
        grid-template-columns: 1fr;
    }
    
    .solutions-grid {
        grid-template-columns: 1fr;
    }
    
    .values-list {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .process-timeline::before {
        left: 24px;
    }
    
    .process-number {
        width: 48px;
        height: 48px;
        font-size: 18px;
    }
}

@media (max-width: 768px) {
    .about-hero-title {
        font-size: 36px;
    }
    
    .about-hero-desc {
        font-size: 18px;
    }
    
    .about-hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .values-list {
        grid-template-columns: 1fr;
    }
    
    .diff-title {
        font-size: 28px;
    }
    
    .process-step {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .process-timeline::before {
        display: none;
    }
    
    .process-number {
        margin: 0 auto;
    }
}

@media (max-width: 480px) {
    .about-hero-title {
        font-size: 32px;
    }
    
    .solution-header {
        flex-direction: column;
        text-align: center;
    }
    
    .contact-cta-buttons {
        flex-direction: column;
    }
}