:root {
    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent-1: #38bdf8;
    --accent-2: #818cf8;
    --border-glass: rgba(255, 255, 255, 0.1);
    --nav-height: 70px;
}

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

body {
    font-family: 'Inter', 'Noto Sans TC', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Background Particles Container */
#particles-js {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    background: linear-gradient(135deg, #020617 0%, #0f172a 100%);
}

/* Navigation */
.glass-nav {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--nav-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 5%;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-glass);
    z-index: 1000;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(to right, var(--accent-1), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

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

.nav-links a:hover {
    color: var(--accent-1);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: var(--nav-height);
}

.hero-content {
    max-width: 800px;
    padding: 2rem;
}

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent-1);
    border-radius: 50px;
    border: 1px solid rgba(56, 189, 248, 0.2);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.gradient-text {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #fff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.5rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.cta-btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: none;
    cursor: pointer;
}

.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(56, 189, 248, 0.3);
}

/* Main Content & Cards */
main {
    padding: 2rem 5%;
    max-width: 1400px;
    margin: 0 auto;
}

.section-container {
    margin-bottom: 5rem;
    scroll-margin-top: calc(var(--nav-height) + 2rem);
}

.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: 24px;
    padding: 3rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.2);
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    display: flex;
    align-items: baseline;
    gap: 1rem;
    border-bottom: 2px solid rgba(255,255,255,0.05);
    padding-bottom: 1rem;
}

.en-title {
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--accent-2);
    font-family: 'Inter', sans-serif;
}

h3 {
    font-size: 1.5rem;
    color: var(--accent-1);
    margin: 1.5rem 0 1rem 0;
}

p, li {
    font-size: 1.1rem;
    color: #cbd5e1;
    margin-bottom: 1rem;
}

ul, ol {
    padding-left: 1.5rem;
    margin-bottom: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

/* Grids */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.image-content img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    border: 1px solid var(--border-glass);
}

.hover-scale {
    transition: transform 0.5s ease;
}

.hover-scale:hover {
    transform: scale(1.02);
}

/* Features */
.feature-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.feature-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    background: rgba(255,255,255,0.03);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.05);
}

.feature-item .icon {
    font-size: 1.5rem;
}

/* Chart Section */
.chart-box {
    margin-top: 3rem;
    background: rgba(0,0,0,0.2);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,0.05);
}

.chart-img {
    width: 100%;
    max-width: 900px;
    margin: 1.5rem auto;
    display: block;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.highlight-box {
    background: linear-gradient(90deg, rgba(56, 189, 248, 0.1), transparent);
    border-left: 4px solid var(--accent-1);
    padding: 1.5rem;
    border-radius: 0 8px 8px 0;
    margin-top: 1.5rem;
    color: #e2e8f0;
}

/* Thoughts Grid */
.thoughts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.thought-card {
    background: rgba(255,255,255,0.03);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,0.05);
    transition: transform 0.3s ease;
}

.thought-card:hover {
    transform: translateY(-5px);
    background: rgba(255,255,255,0.05);
}

.thought-card h3 {
    margin-top: 0;
    font-size: 1.3rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 3rem;
    border-top: 1px solid var(--border-glass);
    margin-top: 5rem;
    color: var(--text-muted);
}

/* Animations & Utilities */
.fade-in {
    animation: fadeIn 1s ease-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.scroll-reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.scroll-reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .grid-2 {
        grid-template-columns: 1fr;
    }
    
    .grid-2.reverse .image-content {
        order: -1;
    }
    
    .gradient-text {
        font-size: 2.5rem;
    }
    
    .nav-links {
        display: none;
    }
}