/* 全域變數 */
:root {
    --bg-primary: #0a0a0c;
    --bg-card: #141418;
    --bg-card-alt: #1a1a1f;
    --text-primary: #f0f0f0;
    --text-secondary: #9a9a9a;
    --border-color: #2a2a30;
    --accent-blue: #3b82f6;
    --accent-green: #22c55e;
    --accent-red: #ef4444;
    --accent-hover: #2563eb;
    --radius-card: 12px;
    --radius-button: 8px;
    --spacing-section: 1.5rem;
    --shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.5);
}

/* 基礎樣式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans TC', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

/* 導航列 */
header {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-soft);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo i {
    color: var(--accent-blue);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--accent-blue);
}

/* Hero 區域 */
.hero {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    min-height: calc(100vh - 72px);
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-info {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.info-item i {
    color: var(--accent-green);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--accent-blue);
    color: white;
    padding: 1rem 2rem;
    border-radius: var(--radius-button);
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.cta-button:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.visual-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-card);
    padding: 3rem;
    box-shadow: var(--shadow-medium);
    text-align: center;
    position: relative;
}

.visual-card .main-icon {
    width: 120px;
    height: 120px;
    color: var(--accent-blue);
    margin-bottom: 1.5rem;
}

.visual-badges {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.badge {
    background-color: var(--bg-card-alt);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
}

/* 區域通用樣式 */
section {
    padding: 4rem 2rem;
}

section h2 {
    text-align: center;
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

/* 課程內容區域 */
.course-section {
    background-color: var(--bg-card-alt);
}

/* 課程介紹圖片 */
.course-intro-image {
    max-width: 1200px;
    margin: 0 auto 3rem;
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow-medium);
}

.course-intro-image img {
    width: 100%;
    height: auto;
    display: block;
}

.course-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.course-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-card);
    padding: 2rem;
    box-shadow: var(--shadow-soft);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.card-icon {
    width: 60px;
    height: 60px;
    background-color: rgba(59, 130, 246, 0.15);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.card-icon i {
    width: 32px;
    height: 32px;
    color: var(--accent-blue);
}

.course-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.course-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.feature-list li i {
    width: 20px;
    height: 20px;
    color: var(--accent-green);
}

/* 課程特色區域 */
.features-section {
    background-color: var(--bg-primary);
}

.features-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-item {
    text-align: center;
    padding: 2rem;
}

.feature-icon {
    width: 70px;
    height: 70px;
    background-color: rgba(34, 197, 94, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.feature-icon i {
    width: 36px;
    height: 36px;
    color: var(--accent-green);
}

.feature-item h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.feature-item p {
    color: var(--text-secondary);
}

/* 報名資訊區域 */
.pricing-section {
    background-color: var(--bg-card-alt);
}

.pricing-card {
    max-width: 500px;
    margin: 0 auto;
    background-color: var(--bg-card);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-medium);
    overflow: hidden;
}

.pricing-header {
    background-color: var(--accent-blue);
    color: white;
    padding: 2.5rem 2rem;
    text-align: center;
}

.pricing-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.25rem;
    margin-bottom: 0.5rem;
}

.currency {
    font-size: 1.25rem;
    font-weight: 500;
}

.amount {
    font-size: 3rem;
    font-weight: 700;
}

.duration {
    font-size: 1rem;
    opacity: 0.9;
}

.pricing-content {
    padding: 2rem;
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features li i {
    width: 20px;
    height: 20px;
    color: var(--accent-green);
}

.signup-button {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: var(--accent-green);
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius-button);
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.signup-button:hover {
    background-color: #2d5f47;
    transform: translateY(-2px);
}

/* 頁尾 */
footer {
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 3rem 2rem 1.5rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-logo i {
    color: var(--accent-blue);
}

.footer-info p {
    color: var(--text-secondary);
}

.footer-contact h4 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-contact p {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.footer-contact p i {
    width: 18px;
    height: 18px;
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Modal 彈窗 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--bg-card);
    border-radius: var(--radius-card);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-medium);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
}

.close-button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.close-button:hover {
    color: var(--accent-red);
}

.signup-form {
    padding: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-button);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    background-color: var(--bg-card-alt);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.form-group textarea {
    resize: vertical;
}

.submit-button {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: var(--accent-blue);
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius-button);
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.submit-button:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

/* 響應式設計 */
@media (max-width: 768px) {
    .hero {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 3rem 1.5rem;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-info {
        flex-direction: column;
        gap: 0.75rem;
    }

    .visual-card {
        padding: 2rem;
    }

    .visual-card .main-icon {
        width: 80px;
        height: 80px;
    }

    nav {
        padding: 1rem 1.5rem;
    }

    .nav-links {
        gap: 1.25rem;
    }

    section {
        padding: 3rem 1.5rem;
    }

    section h2 {
        font-size: 1.75rem;
    }

    .course-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }
}