/* CSS Variables */
:root {
    --color-primary: #c8102e;
    --color-primary-dark: #8b0000;
    --color-accent: #ffde00;
    --color-accent-dark: #ffa500;
    --color-text: #333;
    --color-text-light: #666;
    --color-bg: #fff;
    --color-bg-light: #f8f9fa;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: box-shadow 0.3s ease;
}

.header.scrolled {
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

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

.logo h1 {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 0.25rem;
}

.tagline {
    font-size: 0.875rem;
    opacity: 0.9;
}

.nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

.nav a:hover {
    opacity: 0.8;
}

/* Language Selector */
.language-selector {
    position: relative;
}

.lang-toggle {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background-color 0.3s;
}

.lang-toggle:hover {
    background: rgba(255, 255, 255, 0.25);
}

.lang-arrow {
    font-size: 0.7rem;
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: white;
    border-radius: 5px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    min-width: 150px;
    display: none;
    z-index: 1000;
}

.lang-dropdown.show {
    display: block;
}

.language-selector .lang-option {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--color-text);
    text-decoration: none;
    transition: background-color 0.2s;
    border-bottom: 1px solid #f0f0f0;
}

.language-selector .lang-option:last-child {
    border-bottom: none;
}

.language-selector .lang-option:hover {
    background-color: var(--color-bg-light);
}

.language-selector .lang-option.active {
    background-color: var(--color-primary);
    color: white;
    font-weight: 600;
}

.language-selector .lang-option.active:hover {
    background-color: var(--color-primary-dark);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    padding: 4rem 0;
    text-align: center;
}

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

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--color-primary-dark);
    font-weight: 600;
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    color: var(--color-text);
    line-height: 1.8;
}

.cta-button {
    display: inline-block;
    background-color: var(--color-primary);
    color: white;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-size: 1.125rem;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 15px rgba(200, 16, 46, 0.3);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(200, 16, 46, 0.4);
    background-color: var(--color-primary-dark);
}

/* Section Styles */
section {
    padding: 4rem 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: var(--color-primary);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--color-accent);
    margin: 1rem auto 0;
}

/* Services Section */
.services {
    background-color: var(--color-bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: center;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.service-card h3 {
    color: var(--color-primary);
    margin-bottom: 1rem;
    font-size: 1.375rem;
}

.service-card p {
    color: var(--color-text-light);
    line-height: 1.6;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.about-card {
    padding: 1.5rem;
    background-color: var(--color-bg-light);
    border-radius: 10px;
    border-left: 4px solid var(--color-accent);
}

.about-card h3 {
    color: var(--color-primary);
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.about-card p {
    color: var(--color-text-light);
}

/* Process Section */
.process {
    background-color: var(--color-bg-light);
}

.process-steps {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    flex: 1;
    min-width: 150px;
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 1rem;
}

.step h3 {
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.step p {
    color: var(--color-text-light);
    font-size: 0.875rem;
}

/* Contact Section */
.contact-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--color-text-light);
    margin-bottom: 3rem;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info h3 {
    color: var(--color-primary);
    margin-bottom: 1.5rem;
    font-size: 1.375rem;
}

.info-item {
    margin-bottom: 1rem;
    padding: 0.75rem;
    background-color: var(--color-bg-light);
    border-radius: 5px;
}

.info-item strong {
    color: var(--color-primary);
}

.info-item a {
    color: var(--color-text);
    text-decoration: none;
}

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

.contact-form-container h3 {
    color: var(--color-primary);
    margin-bottom: 1.5rem;
    font-size: 1.375rem;
}

.contact-form {
    background-color: var(--color-bg-light);
    padding: 2rem;
    border-radius: 10px;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--color-text);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.submit-button {
    background-color: var(--color-primary);
    color: white;
    padding: 0.875rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
    width: 100%;
}

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

.form-message {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 5px;
    display: none;
}

.form-message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.form-message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

/* Footer */
.footer {
    background-color: #333;
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.footer-note {
    margin-top: 0.5rem;
    color: var(--color-accent);
    font-style: italic;
}

/* Animation on Scroll */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav {
        flex-wrap: wrap;
        gap: 1rem;
        justify-content: center;
    }
    
    .language-selector {
        width: 100%;
        display: flex;
        justify-content: center;
    }
    
    .lang-toggle {
        width: auto;
        min-width: 120px;
    }
    
    .lang-dropdown {
        right: auto;
        left: 50%;
        transform: translateX(-50%);
    }
    
    .hero h2 {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .process-steps {
        flex-direction: column;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero h2 {
        font-size: 1.5rem;
    }
    
    .cta-button {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
    
    .logo h1 {
        font-size: 1.5rem;
    }
}