/* Shenzhen Travel Website - Innovation Hub & Coastal City Theme */

/* ===== RESET AND BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* ===== COLOR PALETTE (Shenzhen - Tech/Ocean Theme) ===== */
:root {
    --primary-color: #0066cc;        /* 科技蓝 */
    --secondary-color: #00a2e8;      /* 海洋蓝 */
    --accent-color: #003d82;         /* 深蓝色 */
    --tech-cyan: #00d4ff;           /* 科技青 */
    --light-blue: #e6f3ff;          /* 浅蓝背景 */
    --text-dark: #333;
    --text-light: #666;
    --white: #fff;
    --shadow: rgba(0, 102, 204, 0.15);
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    z-index: 1000;
    padding: 1rem 0;
    border-bottom: 3px solid var(--primary-color);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h2 {
    color: var(--primary-color);
    font-size: 1.8rem;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0, 102, 204, 0.2);
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    padding: 10px 15px;
    border-radius: 25px;
}

.nav-link:hover {
    color: var(--primary-color);
    background: var(--light-blue);
    transform: translateY(-2px);
}

/* ===== HERO SECTION ===== */
.hero {
    height: 100vh;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--tech-cyan) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/shenzhen-hero-bg.jpg') center/cover;
    opacity: 0.2;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(0, 102, 204, 0.6) 0%, rgba(0, 61, 130, 0.8) 100%);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    max-width: 800px;
    padding: 0 20px;
}

.hero-content h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    font-weight: bold;
    text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.5);
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 2rem;
    font-weight: 300;
    margin-bottom: 1rem;
    color: var(--light-blue);
    animation: fadeInUp 1.2s ease-out;
}

.hero-content p {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    animation: fadeInUp 1.4s ease-out;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1.6s ease-out;
}

.btn {
    padding: 15px 35px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.4s ease;
    border: 3px solid transparent;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary {
    background: var(--accent-color);
    color: var(--white);
    border-color: var(--accent-color);
    box-shadow: 0 8px 25px rgba(0, 61, 130, 0.3);
}

.btn-primary:hover {
    background: #0051a8;
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(0, 61, 130, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    border-color: var(--light-blue);
}

/* ===== CITY INTRODUCTION ===== */
.city-intro {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--light-blue) 0%, #f0f8ff 100%);
}

.city-intro h2 {
    color: var(--primary-color);
    font-size: 3rem;
    text-align: center;
    margin-bottom: 2rem;
    text-shadow: 2px 2px 4px rgba(0, 102, 204, 0.1);
}

.intro-text {
    font-size: 1.3rem;
    line-height: 1.8;
    color: var(--text-light);
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

/* ===== ATTRACTIONS SECTION ===== */
.attractions {
    padding: 120px 0;
    background: var(--white);
}

.attractions h2 {
    color: var(--primary-color);
    font-size: 2.8rem;
    text-align: center;
    margin-bottom: 4rem;
    position: relative;
}

.attractions h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.attractions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.attraction-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px var(--shadow);
    transition: all 0.4s ease;
    border: 2px solid transparent;
    position: relative;
}

.attraction-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 102, 204, 0.25);
    border-color: var(--secondary-color);
}

.attraction-image {
    height: 280px;
    overflow: hidden;
    position: relative;
}

.attraction-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(0, 102, 204, 0.15) 0%, transparent 50%);
}

.attraction-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.attraction-card:hover .attraction-image img {
    transform: scale(1.1);
}

.attraction-info {
    padding: 2rem;
}

.attraction-info h3 {
    color: var(--primary-color);
    font-size: 1.6rem;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.attraction-info h4 {
    color: var(--secondary-color);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    font-style: italic;
}

.location {
    color: var(--secondary-color);
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.rating {
    margin: 1.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.stars {
    color: var(--tech-cyan);
    font-size: 1.2rem;
}

.rating-text {
    color: var(--text-light);
    font-weight: 500;
}

.hours {
    color: var(--text-light);
    font-style: italic;
    font-size: 1rem;
}

/* ===== CUISINE SECTION ===== */
.cuisine {
    padding: 120px 0;
    background: linear-gradient(135deg, #cceeff 0%, var(--light-blue) 100%);
}

.cuisine h2 {
    color: var(--accent-color);
    font-size: 2.8rem;
    text-align: center;
    margin-bottom: 4rem;
}

.cuisine-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.restaurant-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 61, 130, 0.2);
    transition: all 0.4s ease;
}

.restaurant-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 61, 130, 0.3);
}

.restaurant-image {
    height: 250px;
    overflow: hidden;
    position: relative;
}

.restaurant-image::after {
    content: '🌊';
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--accent-color);
    color: var(--white);
    padding: 8px 15px;
    border-radius: 25px;
    font-size: 1.3rem;
    box-shadow: 0 4px 15px rgba(0, 61, 130, 0.3);
}

.restaurant-info {
    padding: 2rem;
}

.restaurant-info h3 {
    color: var(--accent-color);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.restaurant-info h4 {
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: 1rem;
    font-style: italic;
}

.price-rating {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 1.5rem 0;
    font-weight: 600;
}

.price {
    color: var(--secondary-color);
    font-size: 1.1rem;
}

.rating {
    color: var(--tech-cyan);
}

.specialties {
    color: var(--primary-color);
    font-style: italic;
    margin-top: 1rem;
    font-size: 1rem;
}

/* ===== TECH INNOVATION SECTION ===== */
.tech-innovation {
    padding: 120px 0;
    background: var(--white);
    position: relative;
}

.tech-innovation::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"><circle cx="20" cy="20" r="1" fill="rgba(0,102,204,0.1)"/><circle cx="80" cy="40" r="1.5" fill="rgba(0,162,232,0.08)"/><circle cx="40" cy="70" r="1.2" fill="rgba(0,212,255,0.12)"/></svg>');
    opacity: 0.5;
}

.tech-innovation h2 {
    color: var(--primary-color);
    font-size: 2.8rem;
    text-align: center;
    margin-bottom: 4rem;
    position: relative;
    z-index: 1;
}

.tech-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
    position: relative;
    z-index: 1;
}

.tech-card {
    text-align: center;
    padding: 3rem 2rem;
    background: linear-gradient(135deg, #f0f8ff 0%, var(--light-blue) 100%);
    border-radius: 20px;
    transition: all 0.4s ease;
    border: 3px solid transparent;
    position: relative;
}

.tech-card::before {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color), var(--tech-cyan));
    border-radius: 20px;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.tech-card:hover {
    transform: translateY(-10px);
}

.tech-card:hover::before {
    opacity: 1;
}

.tech-icon {
    font-size: 4rem;
    margin-bottom: 2rem;
    animation: float 3s ease-in-out infinite;
}

.tech-card h3 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    font-weight: bold;
}

.tech-card p {
    color: var(--text-light);
    line-height: 1.7;
    font-size: 1.1rem;
}

/* ===== ABOUT & CONTACT SECTIONS ===== */
.about, .contact {
    padding: 100px 0;
}

.about {
    background: linear-gradient(135deg, #f0f8ff 0%, var(--light-blue) 100%);
}

.contact {
    background: var(--white);
}

.about h2, .contact h2 {
    color: var(--primary-color);
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
}

.about-content, .contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--text-light);
    line-height: 1.8;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.feature {
    padding: 1.5rem;
    background: var(--white);
    border-radius: 15px;
    box-shadow: 0 5px 15px var(--shadow);
    border-left: 5px solid var(--primary-color);
}

.feature h4 {
    color: var(--primary-color);
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}

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

.contact-info h4 {
    color: var(--primary-color);
    font-size: 1.6rem;
    margin-bottom: 1.5rem;
}

.contact-info p {
    margin-bottom: 1rem;
    color: var(--text-light);
    font-size: 1.1rem;
}

.contact-form {
    background: linear-gradient(135deg, #f0f8ff 0%, var(--light-blue) 100%);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px var(--shadow);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 1.2rem;
    margin-bottom: 1.5rem;
    border: 2px solid #ddd;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

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

.contact-form textarea {
    height: 150px;
    resize: vertical;
}

/* ===== FOOTER ===== */
footer {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--primary-color) 100%);
    color: var(--white);
    text-align: center;
    padding: 3rem 0;
    position: relative;
}

footer::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"><circle cx="20" cy="20" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="40" r="1.5" fill="rgba(255,255,255,0.08)"/><circle cx="40" cy="70" r="1.2" fill="rgba(255,255,255,0.12)"/></svg>');
    opacity: 0.3;
}

footer p {
    font-size: 1.1rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 1;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.tech-card:nth-child(1) .tech-icon { animation-delay: 0s; }
.tech-card:nth-child(2) .tech-icon { animation-delay: 1s; }
.tech-card:nth-child(3) .tech-icon { animation-delay: 2s; }

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .attractions-grid,
    .cuisine-grid {
        grid-template-columns: 1fr;
    }
    
    .tech-cards {
        grid-template-columns: 1fr;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .price-rating {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }
    
    .cuisine-grid {
        grid-template-columns: 1fr;
    }
}