/* 健身减脂餐 - 黑绿配色方案 */

:root {
    /* 黑绿主题配色 - Dark & Green Theme */
    --primary-color: #00d26a;
    --primary-dark: #00a854;
    --primary-light: #e6fff0;
    --secondary-color: #1a1a2e;
    --accent-color: #ff6b35;
    
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-dark: #0a0a12;
    
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-light: #ffffff;
    
    --border-color: #2a2a3e;
    --shadow-color: rgba(0, 210, 106, 0.2);
    
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-heading: 'Montserrat', 'Roboto', 'PingFang SC', sans-serif;
    
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
}

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

/* Header */
.site-header {
    background: var(--bg-secondary);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid var(--primary-color);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 2rem;
}

.logo h1 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.main-nav {
    display: flex;
    gap: 35px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

.header-actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

.btn-search, .btn-login {
    padding: 10px 20px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.btn-search {
    background: transparent;
    color: var(--text-secondary);
    font-size: 1.2rem;
}

.btn-search:hover {
    color: var(--primary-color);
}

.btn-login {
    background: var(--primary-color);
    color: var(--bg-primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-login:hover {
    background: var(--primary-dark);
    box-shadow: 0 0 20px var(--shadow-color);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, var(--shadow-color) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3rem;
    color: var(--text-primary);
    margin-bottom: 20px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.hero-title span {
    color: var(--primary-color);
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.hero-search {
    display: flex;
    max-width: 600px;
    margin: 0 auto 35px;
    gap: 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.search-input {
    flex: 1;
    padding: 18px 24px;
    border: 2px solid var(--border-color);
    border-right: none;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
}

.search-input::placeholder {
    color: var(--text-secondary);
}

.search-input:focus {
    border-color: var(--primary-color);
}

.btn-primary {
    padding: 18px 32px;
    background: var(--primary-color);
    color: var(--bg-primary);
    border: none;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: 0 0 30px var(--shadow-color);
}

.hero-tags {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.tag {
    padding: 10px 24px;
    background: transparent;
    border: 2px solid var(--primary-color);
    border-radius: 25px;
    font-size: 0.9rem;
    color: var(--primary-color);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    text-transform: uppercase;
}

.tag:hover {
    background: var(--primary-color);
    color: var(--bg-primary);
    box-shadow: 0 0 20px var(--shadow-color);
}

/* Categories Section */
.categories {
    padding: 80px 0;
    background: var(--bg-primary);
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    text-align: center;
    margin-bottom: 50px;
    color: var(--text-primary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--primary-color);
    margin: 15px auto 0;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 25px;
}

.category-card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: 35px 20px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.category-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 40px rgba(0, 210, 106, 0.15);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.category-card h4 {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 8px;
    text-transform: uppercase;
}

.category-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Recipes Section */
.recipes {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.recipe-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.recipe-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.recipe-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 210, 106, 0.15);
    border-color: var(--primary-color);
}

.recipe-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, #1a2a1a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    border-bottom: 2px solid var(--border-color);
}

.recipe-content {
    padding: 22px;
}

.recipe-title {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--text-primary);
    font-weight: 600;
}

.recipe-meta {
    display: flex;
    gap: 18px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.recipe-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.recipe-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.recipe-tag {
    padding: 5px 12px;
    background: rgba(0, 210, 106, 0.15);
    color: var(--primary-color);
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
}

.load-more {
    text-align: center;
    margin-top: 50px;
}

.btn-secondary {
    padding: 14px 36px;
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--bg-primary);
    box-shadow: 0 0 30px var(--shadow-color);
}

/* Features Section */
.features {
    padding: 80px 0;
    background: var(--bg-primary);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 35px;
}

.feature-item {
    text-align: center;
    padding: 40px 25px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.feature-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 40px rgba(0, 210, 106, 0.1);
}

.feature-icon {
    font-size: 3.5rem;
    margin-bottom: 20px;
}

.feature-item h4 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--text-primary);
    font-weight: 600;
    text-transform: uppercase;
}

.feature-item p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Footer */
.site-footer {
    background: var(--bg-dark);
    color: var(--text-light);
    padding: 60px 0 25px;
    border-top: 2px solid var(--primary-color);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand .logo-icon {
    font-size: 2.5rem;
}

.footer-brand h4 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    margin: 12px 0;
    color: var(--primary-color);
    font-weight: 700;
    text-transform: uppercase;
}

.footer-brand p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 0.95rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.link-group h5 {
    font-size: 1rem;
    margin-bottom: 18px;
    color: var(--text-primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.link-group a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 12px;
    transition: var(--transition);
    font-size: 0.95rem;
}

.link-group a:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 25px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .main-nav {
        display: none;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-search {
        flex-direction: column;
        border-radius: var(--border-radius-lg);
    }
    
    .search-input {
        border-right: 2px solid var(--border-color);
        border-bottom: none;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 35px;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .logo h1 {
        font-size: 1.2rem;
    }
    
    .hero-title {
        font-size: 1.6rem;
    }
}