:root {
    --bg-color: #0F1419; /* 科技深藍底色 */
    --text-color: #dcddde;
    --navbar-bg: #1B2129; /* 稍微亮一點的深藍黑 */
    --accent-color: #4efda4; /* 螢光綠主色 */
    --accent-hover: #3be08d;
    --card-bg: #141b22;
    --card-border: #4efda4; /* 卡片邊框發光 */
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Segoe UI', 'Microsoft JhengHei', 'PingFang TC', Roboto, sans-serif;
    line-height: 1.6;
    background-image: 
        radial-gradient(circle at center, #1B2129 0%, #0F1419 100%),
        linear-gradient(rgba(78, 253, 164, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(78, 253, 164, 0.03) 1px, transparent 1px);
    background-size: 100% 100%, 30px 30px, 30px 30px;
    background-attachment: fixed;
    animation: bgGridMove 20s linear infinite;
}

@keyframes bgGridMove {
    0% { background-position: center, 0 0, 0 0; }
    100% { background-position: center, 30px 30px, 0 30px; }
}

a {
    color: var(--accent-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Navbar */
.navbar {
    background-color: var(--navbar-bg);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: #fff;
    text-decoration: none;
}

.brand:hover {
    text-decoration: none;
}

.nav-links img {
    height: 30px;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-color);
    font-weight: 500;
}

.nav-links a:hover {
    color: #fff;
    text-decoration: none;
}

.btn {
    background-color: var(--accent-color);
    color: #fff !important;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-weight: bold;
    transition: background-color 0.2s;
    text-decoration: none;
    display: inline-block;
}

.btn:hover {
    background-color: var(--accent-hover);
    text-decoration: none;
}

/* Container */
.container {
    max-width: 1000px;
    margin: 2rem auto;
    padding: 0 1rem;
}

/* Home Page */
.hero {
    text-align: center;
    padding: 6rem 1rem 4rem 1rem;
    position: relative;
}

.bot-avatar {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    margin-bottom: 20px;
    border: 3px solid var(--accent-color);
    box-shadow: 0 0 25px rgba(78, 253, 164, 0.4), 0 0 60px rgba(78, 253, 164, 0.2);
    animation: float 4s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0px); }
}

.bot-tag {
    color: var(--accent-color);
    font-size: 2.8rem;
    text-shadow: 0 0 10px rgba(78, 253, 164, 0.6);
    opacity: 0.9;
    animation: neonPulse 2s ease-in-out infinite alternate;
}

@keyframes neonPulse {
    from {
        text-shadow: 0 0 5px rgba(78, 253, 164, 0.4);
    }
    to {
        text-shadow: 0 0 15px rgba(78, 253, 164, 0.8), 0 0 30px rgba(78, 253, 164, 0.4);
    }
}

.hero h1 {
    font-size: 3.2rem;
    color: #fff;
    margin-bottom: 1rem;
    text-shadow: 0 0 8px rgba(78, 253, 164, 0.4);
    animation: fadeInUp 1s ease-out forwards;
}

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

.hero p {
    font-size: 1.2rem;
    color: #4efda4; /* 改成稍微淡一點的綠色或直接用螢光綠 */
    opacity: 0.8;
    margin-bottom: 2.5rem;
    letter-spacing: 1px;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

.btn {
    border: 1px solid var(--accent-hover);
    box-shadow: 0 0 10px rgba(78, 253, 164, 0.2);
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #0F1419 !important; /* 主按鈕深色字體，背景亮色 */
}

.btn:hover {
    box-shadow: 0 0 20px rgba(78, 253, 164, 0.6);
}

.btn-secondary {
    background-color: transparent;
    color: var(--accent-color) !important;
    border: 1px solid var(--accent-color);
}

.btn-secondary:hover {
    background-color: rgba(78, 253, 164, 0.1);
}

.btn-secondary:hover {
    background-color: #686d73;
}

/* Content Cards */
.features {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

.feature-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 1.5rem;
    flex: 1 1 calc(33.333% - 1rem);
    min-width: 250px;
}

.feature-card h3 {
    color: #fff;
    margin-top: 0;
}

/* Highlight Section */
.highlight-section {
    background-color: #2b2d31;
    border-left: 4px solid #f8a532; /* Orange accent */
    padding: 1.5rem;
    border-radius: 4px;
    margin-top: 3rem;
}

.highlight-section h2 {
    color: #fff;
    margin-top: 0;
}

/* Markdown-like Styles */
.markdown-body h1, .markdown-body h2, .markdown-body h3 {
    border-bottom: 1px solid #4f545c;
    padding-bottom: 0.5rem;
    color: #fff;
}

.markdown-body ul {
    padding-left: 1.5rem;
}

.markdown-body hr {
    border: none;
    border-top: 1px solid #4f545c;
    margin: 2rem 0;
}

/* NyankoHost Grid Layout */
.nyanko-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 1.5rem;
}

@media (max-width: 768px) {
    .nyanko-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

.nyanko-grid h3 {
    color: #fff;
    margin-top: 0;
    border-bottom: 1px solid #4f545c;
    padding-bottom: 0.5rem;
}

.nyanko-grid ul, .nyanko-grid ol {
    margin-top: 0.5rem;
    padding-left: 1.5rem;
}

.nyanko-grid li {
    margin-bottom: 0.5rem;
}

/* Nyanko Promo Button */
.btn-nyanko {
    background-color: #f8a532 !important;
    margin-top: 2rem;
    width: 100%;
    text-align: center;
    box-sizing: border-box;
    font-size: 1.1rem;
    padding: 1rem;
}

.btn-nyanko:hover {
    background-color: #e0942b !important;
}