/* ==========================================
   苍梧温氏家禽有限公司 - 全新设计
   设计风格：绿色、自然、生态
   配色方案：草绿色 + 泥土色 + 日光橙
   ========================================== */

:root {
    /* 品牌色彩 - 自然生态主题 */
    --color-primary: #22A560;
    --color-primary-light: #4CBF7F;
    --color-primary-dark: #1A7D48;
    --color-secondary: #8B5A3C;
    --color-secondary-light: #A67456;
    --color-secondary-dark: #6D4830;
    --color-accent: #FFA726;
    --color-accent-light: #FFB74D;
    
    /* 中性色 */
    --color-dark: #1C1C1C;
    --color-gray: #5A5A5A;
    --color-light: #F8F9FA;
    --color-white: #FFFFFF;
    --color-border: #E0E0E0;
    
    /* 字体 */
    --font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 32px;
    --font-size-4xl: 40px;
    --font-size-5xl: 52px;
    
    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(34, 165, 96, 0.08);
    --shadow-md: 0 4px 12px rgba(34, 165, 96, 0.12);
    --shadow-lg: 0 8px 20px rgba(34, 165, 96, 0.15);
    
    --header-height: 65px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-dark);
    background: var(--color-white);
}

img {
    max-width: 100%;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* ===== 导航栏 - 自然风格 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    box-shadow: var(--shadow-md);
    z-index: 1000;
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar-logo-text {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-md);
    border: 2px solid rgba(255, 255, 255, 0.3);
    white-space: nowrap;
}

.navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.navbar-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: white;
    border-radius: 2px;
    transition: 0.3s;
}

.navbar-menu {
    display: flex;
    gap: var(--spacing-xs);
}

.navbar-menu > li > a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: white;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: 0.3s;
}

.navbar-menu > li > a:hover {
    background: rgba(255, 255, 255, 0.2);
}

.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 180px;
    padding: var(--spacing-sm);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: 0.3s;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-dark);
    font-size: var(--font-size-sm);
    border-radius: var(--radius-sm);
    transition: 0.2s;
}

.dropdown-menu li a:hover {
    background: var(--color-light);
    color: var(--color-primary);
}

/* ===== Hero区域 ===== */
.hero {
    margin-top: var(--header-height);
    height: 550px;
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(34, 165, 96, 0.85) 0%, rgba(139, 90, 60, 0.75) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 0 var(--spacing-lg);
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-2xl);
    opacity: 0.95;
}

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

/* ===== Section ===== */
.section {
    padding: var(--spacing-3xl) 0;
}

.section:nth-child(even) {
    background: var(--color-light);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title h2 {
    font-size: var(--font-size-4xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: var(--color-accent);
}

.section-title p {
    font-size: var(--font-size-lg);
    color: var(--color-gray);
}

/* ===== Grid ===== */
.grid {
    display: grid;
    gap: var(--spacing-xl);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* ===== Card - 方正风格 ===== */
.card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: 0.3s;
    border: 2px solid transparent;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
    border-color: var(--color-primary);
}

.card-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.card-content {
    padding: var(--spacing-lg);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.card-description {
    font-size: var(--font-size-base);
    color: var(--color-gray);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.card-link {
    color: var(--color-primary);
    font-weight: 500;
    transition: 0.2s;
}

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

/* ===== Button ===== */
.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: 0.3s;
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--color-accent);
    color: white;
}

.btn-primary:hover {
    background: var(--color-accent-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    border-color: white;
    color: white;
}

.btn-outline:hover {
    background: white;
    color: var(--color-primary);
}

/* ===== Footer ===== */
.footer {
    background: linear-gradient(135deg, #2C3E35 0%, #1C2820 100%);
    color: rgba(255,255,255,0.8);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    color: var(--color-accent);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

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

.footer-section a {
    color: rgba(255,255,255,0.7);
    font-size: var(--font-size-sm);
    transition: 0.2s;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.5);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .navbar-toggle {
        display: flex;
    }
    
    .navbar-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        max-height: 0;
        overflow: hidden;
        transition: 0.3s;
    }
    
    .navbar-menu.active {
        max-height: 500px;
    }
    
    .navbar-menu > li > a {
        color: var(--color-dark);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .footer-content {
        grid-template-columns: 1fr;
    }
}