/**
 * FIYA 雙語走讀 - AI輔助英語系統頁面樣式
 * public/ai-learning/ai-learning.css
 */

/* ============================================
   內容區塊
   ============================================ */

.ai-learning-content {
    padding: 60px 0 100px;
    background: var(--sand, #FFF8E7);
}

.ai-learning-content .container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 區塊標題 */
.section-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-green, #005639);
    margin: 0 0 30px;
}

.section-title .material-icons {
    font-size: 1.75rem;
    color: var(--primary-yellow, #FEB503);
}

/* ============================================
   介紹區塊
   ============================================ */

.intro-section {
    text-align: center;
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    border-radius: 24px;
    padding: 50px 40px;
    color: #fff;
    margin-bottom: 50px;
}

.intro-icon {
    width: 90px;
    height: 90px;
    background: linear-gradient(135deg, #00d4ff, #7c3aed);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(0, 212, 255, 0.4);
    }
    50% {
        box-shadow: 0 0 40px rgba(0, 212, 255, 0.6);
    }
}

.intro-icon .material-icons {
    font-size: 2.5rem;
    color: #fff;
}

.intro-section h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0 0 20px;
    color: #fff;
}

.intro-section p {
    font-size: 1.1875rem;
    line-height: 1.9;
    max-width: 850px;
    margin: 0 auto;
    color: rgba(255, 255, 255, 0.9);
}

.intro-section strong {
    color: #00d4ff;
}

/* ============================================
   五大核心應用
   ============================================ */

.core-apps-section {
    margin-bottom: 50px;
}

.core-apps-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

@media (max-width: 991px) {
    .core-apps-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 575px) {
    .core-apps-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.core-app {
    background: #fff;
    border-radius: 16px;
    padding: 25px 15px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.core-app:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.app-icon {
    width: 55px;
    height: 55px;
    background: linear-gradient(135deg, var(--primary-green, #005639), var(--primary-blue, #00256B));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
}

.app-icon .material-icons {
    font-size: 1.5rem;
    color: #fff;
}

.core-app h4 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--text-dark, #2c3e50);
    margin: 0 0 8px;
}

.core-app p {
    font-size: 0.9375rem;
    color: var(--text-light, #6c757d);
    line-height: 1.5;
    margin: 0;
}

/* ============================================
   技術簡介
   ============================================ */

.tech-section {
    margin-bottom: 50px;
}

.tech-content {
    background: #fff;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.patent-badge {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, #ffecd2, #fcb69f);
    padding: 15px 25px;
    border-radius: 30px;
    margin-bottom: 25px;
}

.patent-badge .material-icons {
    font-size: 2rem;
    color: #e65100;
}

.patent-badge .label {
    display: block;
    font-size: 0.8125rem;
    color: #666;
}

.patent-badge .number {
    display: block;
    font-size: 1.125rem;
    font-weight: 700;
    color: #e65100;
}

.tech-content h4 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-dark, #2c3e50);
    margin: 0 0 15px;
}

.tech-content > p {
    font-size: 1.125rem;
    color: var(--text-light, #6c757d);
    margin: 0 0 25px;
}

.innovations-list {
    display: grid;
    gap: 15px;
}

.innovation-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 15px 20px;
    background: var(--ocean-light, #E8F4F8);
    border-radius: 12px;
}

.innovation-item .material-icons {
    color: var(--primary-green, #005639);
    font-size: 1.25rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.innovation-item span:last-child {
    font-size: 1.0625rem;
    color: var(--text-dark, #2c3e50);
    line-height: 1.6;
}

/* ============================================
   系統架構
   ============================================ */

.system-section {
    margin-bottom: 50px;
}

.system-diagram {
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    border-radius: 20px;
    padding: 40px;
}

.system-row {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
}

.system-row:last-child {
    margin-bottom: 0;
}

.system-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.1);
    padding: 20px 25px;
    border-radius: 12px;
    color: #fff;
    font-size: 1rem;
    min-width: 140px;
    text-align: center;
    transition: all 0.3s ease;
}

.system-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

.system-item.core {
    background: linear-gradient(135deg, #00d4ff, #7c3aed);
    font-weight: 600;
}

.system-item .material-icons {
    font-size: 1.5rem;
}

.system-desc {
    text-align: center;
    font-size: 1rem;
    color: var(--text-light, #6c757d);
    margin: 25px 0 0;
}

@media (max-width: 767px) {
    .system-row {
        flex-wrap: wrap;
    }

    .system-item {
        min-width: 120px;
        padding: 15px;
    }
}

/* ============================================
   應用場景
   ============================================ */

.scenario-section {
    margin-bottom: 50px;
}

.scenario-intro {
    font-size: 1.125rem;
    color: var(--text-dark, #2c3e50);
    margin-bottom: 30px;
}

.scenario-timeline {
    position: relative;
    padding-left: 40px;
}

.scenario-timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 30px;
    bottom: 30px;
    width: 3px;
    background: linear-gradient(to bottom, #4CAF50, #2196F3, #FF9800, #9C27B0);
    border-radius: 2px;
}

.scenario-step {
    display: flex;
    gap: 25px;
    margin-bottom: 25px;
    position: relative;
}

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

.step-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.step-icon.before {
    background: linear-gradient(135deg, #4CAF50, #2E7D32);
}

.step-icon.during {
    background: linear-gradient(135deg, #2196F3, #1565C0);
}

.step-icon.after {
    background: linear-gradient(135deg, #FF9800, #E65100);
}

.step-icon.teacher {
    background: linear-gradient(135deg, #9C27B0, #6A1B9A);
}

.step-icon .material-icons {
    font-size: 1.5rem;
    color: #fff;
}

.step-content {
    flex: 1;
    background: #fff;
    border-radius: 16px;
    padding: 25px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.step-tag {
    display: inline-block;
    background: var(--ocean-light, #E8F4F8);
    color: var(--primary-green, #005639);
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.step-content h4 {
    font-size: 1.1875rem;
    font-weight: 700;
    color: var(--text-dark, #2c3e50);
    margin: 0 0 8px;
}

.step-content p {
    font-size: 1.0625rem;
    color: var(--text-light, #6c757d);
    line-height: 1.6;
    margin: 0;
}

/* ============================================
   擴展應用
   ============================================ */

.expansion-section {
    margin-bottom: 50px;
}

.expansion-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

@media (max-width: 991px) {
    .expansion-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 575px) {
    .expansion-grid {
        grid-template-columns: 1fr;
    }
}

.expansion-item {
    background: #fff;
    border-radius: 16px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.expansion-item:hover {
    border-color: var(--primary-yellow, #FEB503);
    transform: translateY(-5px);
}

.expansion-item .material-icons {
    font-size: 2.5rem;
    color: var(--primary-green, #005639);
    margin-bottom: 15px;
}

.expansion-item h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-dark, #2c3e50);
    margin: 0 0 8px;
}

.expansion-item p {
    font-size: 1rem;
    color: var(--text-light, #6c757d);
    margin: 0;
}

/* ============================================
   結語
   ============================================ */

.conclusion-section {
    margin-bottom: 50px;
}

.conclusion-content {
    background: linear-gradient(135deg, var(--primary-green, #005639), var(--primary-blue, #00256B));
    border-radius: 20px;
    padding: 50px 40px;
    text-align: center;
    color: #fff;
}

.conclusion-content > .material-icons {
    font-size: 3rem;
    color: var(--primary-yellow, #FEB503);
    margin-bottom: 20px;
}

.conclusion-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 20px;
    color: #fff;
}

.conclusion-content p {
    font-size: 1.1875rem;
    line-height: 1.9;
    max-width: 800px;
    margin: 0 auto;
    color: rgba(255, 255, 255, 0.95);
}

.conclusion-content strong {
    color: var(--primary-yellow, #FEB503);
}

/* ============================================
   相關連結
   ============================================ */

.related-links {
    margin-bottom: 50px;
}

.related-card {
    display: flex;
    align-items: center;
    gap: 20px;
    background: #fff;
    border: 2px solid var(--primary-green, #005639);
    border-radius: 16px;
    padding: 25px 30px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.related-card:hover {
    background: var(--primary-green, #005639);
    color: #fff;
}

.related-card > .material-icons {
    font-size: 2.5rem;
    color: var(--primary-green, #005639);
}

.related-card:hover > .material-icons {
    color: var(--primary-yellow, #FEB503);
}

.related-card div {
    flex: 1;
}

.related-card h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 5px;
    color: var(--text-dark, #2c3e50);
}

.related-card:hover h4 {
    color: #fff;
}

.related-card p {
    font-size: 0.9375rem;
    color: var(--text-light, #6c757d);
    margin: 0;
}

.related-card:hover p {
    color: rgba(255, 255, 255, 0.9);
}

.related-card .arrow {
    font-size: 1.5rem;
    color: var(--text-light, #6c757d);
    transition: transform 0.3s ease;
}

.related-card:hover .arrow {
    color: #fff;
    transform: translateX(5px);
}

/* ============================================
   CTA 區塊
   ============================================ */

.cta-section {
    background: linear-gradient(135deg, var(--primary-green, #005639), var(--primary-blue, #00256B));
    border-radius: 24px;
    padding: 60px 40px;
    text-align: center;
    color: #fff;
}

.cta-content h2 {
    font-size: 2rem;
    font-weight: 700;
    margin: 0 0 15px;
    color: #fff;
}

.cta-content p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin: 0 0 30px;
    color: #fff;
}

.btn-cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--primary-yellow, #FEB503);
    color: #fff;
    padding: 18px 40px;
    border-radius: 50px;
    font-size: 1.125rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(254, 181, 3, 0.4);
}

.btn-cta:hover {
    background: #fff;
    color: var(--primary-green, #005639);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.3);
}

.btn-cta .material-icons {
    font-size: 1.5rem;
}

/* ============================================
   響應式調整
   ============================================ */

@media (max-width: 768px) {
    .intro-section {
        padding: 35px 25px;
    }

    .intro-section h2 {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 1.25rem;
    }

    .tech-content {
        padding: 25px;
    }

    .system-diagram {
        padding: 25px 15px;
    }

    .scenario-timeline {
        padding-left: 0;
    }

    .scenario-timeline::before {
        display: none;
    }

    .scenario-step {
        flex-direction: column;
        gap: 15px;
    }

    .cta-section {
        padding: 40px 25px;
    }

    .cta-content h2 {
        font-size: 1.5rem;
    }
}