/* Chinese-inspired CSS with traditional aesthetics */

:root {
    /* Chinese color palette */
    --crimson-red: #DC143C;
    --imperial-red: #C41E3A;
    --chinese-gold: #FFD700;
    --jade-green: #00A86B;
    --bamboo-green: #5A7247;
    --ink-black: #1A1A1A;
    --paper-white: #F8F6F0;
    --porcelain: #F5F5DC;
    --shadow-gray: #696969;
    --light-sage: #87A96B;
    
    /* Typography */
    --font-serif: 'Noto Serif SC', serif;
    --font-sans: 'Noto Sans SC', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--ink-black);
    background-color: var(--paper-white);
    overflow-x: hidden;
}

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

/* Header */
.header {
    background: linear-gradient(135deg, var(--ink-black) 0%, #2C2C2C 100%);
    color: var(--paper-white);
    padding: var(--spacing-sm) 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--chinese-gold);
    margin: 0;
}

.subtitle {
    font-size: 0.9rem;
    color: var(--light-sage);
    margin-left: var(--spacing-xs);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-links a {
    color: var(--paper-white);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-links a:hover {
    color: var(--chinese-gold);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--chinese-gold);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--paper-white) 0%, var(--porcelain) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><text y="50" font-size="100" fill="rgba(220,20,60,0.03)">龍</text></svg>');
    background-size: 200px 200px;
    background-repeat: repeat;
    opacity: 0.1;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: 4rem;
    font-weight: 700;
    color: var(--imperial-red);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--jade-green);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--shadow-gray);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
}

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

.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    display: inline-block;
    text-align: center;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--imperial-red) 0%, var(--crimson-red) 100%);
    color: var(--paper-white);
    box-shadow: 0 4px 15px rgba(220, 20, 60, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(220, 20, 60, 0.4);
}

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

.btn-secondary:hover {
    background: var(--jade-green);
    color: var(--paper-white);
    transform: translateY(-2px);
}

/* Floating Elements */
.hero-visual {
    position: relative;
    height: 400px;
}

.floating-elements {
    position: relative;
    width: 100%;
    height: 100%;
}

.element {
    position: absolute;
    background: linear-gradient(135deg, var(--chinese-gold) 0%, var(--jade-green) 100%);
    color: var(--paper-white);
    padding: var(--spacing-md);
    border-radius: 50%;
    font-weight: bold;
    font-size: 1.2rem;
    animation: float 6s ease-in-out infinite;
    box-shadow: 0 10px 30px rgba(0, 168, 107, 0.3);
}

.element-1 {
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.element-2 {
    top: 60%;
    right: 30%;
    animation-delay: 1s;
}

.element-3 {
    bottom: 30%;
    left: 40%;
    animation-delay: 2s;
}

.element-4 {
    top: 10%;
    right: 10%;
    animation-delay: 3s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* Section Styles */
.section-title {
    font-family: var(--font-serif);
    font-size: 3rem;
    text-align: center;
    color: var(--imperial-red);
    margin-bottom: var(--spacing-md);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--chinese-gold) 0%, var(--jade-green) 100%);
}

.section-description {
    text-align: center;
    font-size: 1.2rem;
    color: var(--shadow-gray);
    margin-bottom: var(--spacing-xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* About Section */
.about {
    padding: var(--spacing-xl) 0;
    background: var(--paper-white);
}

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

.about-card {
    background: var(--paper-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 168, 107, 0.1);
}

.about-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    border-color: var(--jade-green);
}

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

.about-card h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--imperial-red);
    margin-bottom: var(--spacing-sm);
}

.about-card p {
    color: var(--shadow-gray);
    line-height: 1.8;
}

/* Blog Section */
.blog {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--porcelain) 0%, var(--paper-white) 100%);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.blog-card {
    background: var(--paper-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border-left: 4px solid var(--imperial-red);
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.blog-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.blog-number {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: var(--chinese-gold);
}

.blog-read-time {
    color: var(--shadow-gray);
    font-size: 0.9rem;
}

.blog-card h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--ink-black);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.blog-card p {
    color: var(--shadow-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.blog-link {
    color: var(--jade-green);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.blog-link:hover {
    color: var(--imperial-red);
    transform: translateX(5px);
    display: inline-block;
}

/* Models Section */
.models {
    padding: var(--spacing-xl) 0;
    background: var(--paper-white);
}

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

.model-category {
    background: linear-gradient(135deg, var(--paper-white) 0%, var(--porcelain) 100%);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid rgba(220, 20, 60, 0.1);
}

.model-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    border-color: var(--imperial-red);
}

.model-category h3 {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    color: var(--imperial-red);
    margin-bottom: var(--spacing-sm);
}

.model-category p {
    color: var(--shadow-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.model-features {
    list-style: none;
}

.model-features li {
    padding: var(--spacing-xs) 0;
    color: var(--ink-black);
    position: relative;
    padding-left: var(--spacing-md);
}

.model-features li::before {
    content: '◆';
    position: absolute;
    left: 0;
    color: var(--jade-green);
}

/* Footer */
.footer {
    background: var(--ink-black);
    color: var(--paper-white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

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

.footer-section h3,
.footer-section h4 {
    font-family: var(--font-serif);
    color: var(--chinese-gold);
    margin-bottom: var(--spacing-sm);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section a {
    color: var(--paper-white);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--light-sage);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--shadow-gray);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-visual {
        height: 300px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    .model-categories {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
    }
}