/* ========================================
   Reset & Variables
   ======================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary-color: #FF1493;
    --primary-hover: #FF69B4;
    --primary-dark: #C71585;
    --bg-dark: #0A0A0A;
    --bg-darker: #000000;
    --bg-lighter: #1A1A1A;
    --text-primary: #FFFFFF;
    --text-secondary: #B0B0B0;
    --text-muted: #707070;
    --border-color: #2A2A2A;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #FF1493 0%, #FF69B4 100%);
    --gradient-dark: linear-gradient(180deg, #0A0A0A 0%, #1A1A1A 100%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Typography */
    --font-primary: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 16px;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(255, 20, 147, 0.1);
    --shadow-md: 0 4px 12px rgba(255, 20, 147, 0.15);
    --shadow-lg: 0 8px 24px rgba(255, 20, 147, 0.2);
    --shadow-glow: 0 0 30px rgba(255, 20, 147, 0.3);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ========================================
   Base Styles
   ======================================== */

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-color);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ========================================
   Container
   ======================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========================================
   Typography
   ======================================== */

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

/* ========================================
   Buttons
   ======================================== */

.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* ========================================
   Navigation
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.25rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 1.75rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-base);
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(255, 20, 147, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 105, 180, 0.1) 0%, transparent 50%),
        var(--bg-dark);
    z-index: -1;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

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

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid var(--primary-color);
    border-radius: 15px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes scroll {
    0% {
        opacity: 0;
        top: 8px;
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        top: 24px;
    }
}

/* ========================================
   Features Section
   ======================================== */

.features {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-darker);
}

.section-header {
    margin-bottom: var(--spacing-2xl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--bg-lighter);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.feature-card > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

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

.feature-list li {
    color: var(--text-secondary);
    padding-left: var(--spacing-md);
    position: relative;
}

.feature-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* ========================================
   Stats Section
   ======================================== */

.stats {
    padding: var(--spacing-2xl) 0;
    background: var(--gradient-dark);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* ========================================
   CTA Section
   ======================================== */

.cta {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-dark);
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

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

/* ========================================
   Footer
   ======================================== */

.footer {
    background: var(--bg-darker);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.footer-description {
    color: var(--text-secondary);
    line-height: 1.8;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--bg-lighter);
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.social-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-4px);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-legal {
    display: flex;
    gap: var(--spacing-md);
}

.footer-legal a {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ========================================
   About Page Styles
   ======================================== */

.about-hero {
    padding: calc(80px + var(--spacing-3xl)) 0 var(--spacing-3xl);
    background: var(--gradient-dark);
    text-align: center;
}

.about-hero-content h1 {
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: var(--spacing-md);
}

.story {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-dark);
}

.story-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.image-placeholder {
    width: 100%;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-lighter);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-color);
}

.story-content h2 {
    text-align: left;
    margin-bottom: var(--spacing-lg);
}

.story-text p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.story-text p:last-child {
    margin-bottom: 0;
}

.mission {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-darker);
}

.mission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.mission-card {
    background: var(--bg-lighter);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-base);
}

.mission-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
}

.mission-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.mission-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.mission-card p {
    color: var(--text-secondary);
}

.research {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-dark);
}

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

.research-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: var(--bg-lighter);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.research-item:hover {
    border-color: var(--primary-color);
    transform: translateX(8px);
}

.research-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary-color);
    opacity: 0.3;
}

.research-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.research-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.research-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(255, 20, 147, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(255, 20, 147, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
}

.team {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-darker);
}

.team-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-xl);
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    background: var(--bg-lighter);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.avatar-placeholder {
    width: 200px;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-dark);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.team-info h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.team-title {
    color: var(--primary-color);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.team-bio {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.team-expertise h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.expertise-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.values {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-dark);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.value-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bg-lighter);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.value-item:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
}

.value-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.value-item h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.value-item p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.social-cta {
    padding: var(--spacing-3xl) 0;
    background: var(--gradient-dark);
}

.social-cta-content {
    text-align: center;
}

.social-cta-content h2 {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: var(--spacing-md);
}

.social-cta-content p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.social-links-large {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

.social-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-xl);
    background: var(--bg-lighter);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.social-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow);
}

.social-card svg {
    color: var(--primary-color);
}

.social-card span {
    font-size: 1.125rem;
    font-weight: 600;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .about-hero-content h1 {
        font-size: 2.5rem;
    }

    .story-grid {
        grid-template-columns: 1fr;
    }

    .research-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .research-number {
        font-size: 2rem;
    }

    .team-card {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .avatar-placeholder {
        margin: 0 auto;
    }

    .expertise-tags {
        justify-content: center;
    }

    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        background: var(--bg-dark);
        flex-direction: column;
        padding: var(--spacing-lg);
        border-top: 1px solid var(--border-color);
        transition: left var(--transition-base);
    }

    .nav-menu.active {
        left: 0;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .hero-buttons,
    .cta-buttons {
        flex-direction: column;
    }

    .btn-large {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-2xl: 3rem;
        --spacing-3xl: 4rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .features-grid,
    .mission-grid,
    .values-grid,
    .social-links-large {
        grid-template-columns: 1fr;
    }

    .stat-number {
        font-size: 2.5rem;
    }
}