/* 自定义样式文件 - 活牛采购智能数字化系统官网 */

/* 全局样式 */
:root {
    --primary-color: #4CAF50; /* 农业绿色主色调 */
    --primary-light: #81C784; /* 浅绿色 */
    --primary-dark: #388E3C; /* 深绿色 */
    --secondary-color: #1976D2; /* 深蓝色辅助色 */
    --success-color: #00d474; /* 绿色成功色 */
    --warning-color: #FF9800; /* 橙色警告色 */
    --danger-color: #ff3c78; /* 粉色危险色 */
    --light-color: #f8f9fa;
    --dark-color: #121212; /* 深色背景 */
    --gray-color: #2d2d2d; /* 灰色 */
    --text-light: #f8f9fa; /* 浅色文字 */
    --text-dark: #343a40; /* 深色文字 */
    
    --font-family-base: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif, 'Source Han Sans CN';
    --border-radius: 0.75rem;
    --box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.3);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --neon-shadow: 0 0 10px rgba(76, 175, 80, 0.5);
    --neon-shadow-hover: 0 0 20px rgba(76, 175, 80, 0.8);
}

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

body {
    font-family: var(--font-family-base);
    line-height: 1.6;
    color: var(--text-light);
    background-color: var(--dark-color);
    overflow-x: hidden;
}

/* 导航栏样式 */
.navbar {
    padding: 1rem 0;
    transition: var(--transition);
    background: rgba(30, 30, 30, 0.8) !important;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(76, 175, 80, 0.2);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--text-light) !important;
    text-shadow: 0 0 10px rgba(76, 175, 80, 0.5);
}

.navbar-nav .nav-link {
    font-weight: 500;
    color: var(--text-light) !important;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    position: relative;
    overflow: hidden;
}

.navbar-nav .nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(76, 175, 80, 0.2), transparent);
    transition: 0.5s;
}

.navbar-nav .nav-link:hover::before {
    left: 100%;
}

.navbar-nav .nav-link:hover {
    color: var(--secondary-color) !important;
    box-shadow: var(--neon-shadow);
}

.navbar-nav .nav-link.active {
    color: var(--secondary-color) !important;
    background: rgba(76, 175, 80, 0.1);
    box-shadow: var(--neon-shadow);
}

/* 英雄区域样式 */
.hero-section {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: var(--text-light);
    position: relative;
    overflow: hidden;
    padding: 6rem 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 10% 20%, rgba(111, 66, 193, 0.1) 0%, transparent 20%),
                radial-gradient(circle at 90% 80%, rgba(0, 198, 255, 0.1) 0%, transparent 20%);
    z-index: 1;
}

.hero-section .container {
    position: relative;
    z-index: 2;
}

.hero-section h1 {
    font-weight: 800;
    margin-bottom: 1.5rem;
    font-size: 3.5rem;
    background: linear-gradient(to right, var(--secondary-color), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 20px rgba(0, 198, 255, 0.3);
}

.hero-section .lead {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* 功能特性卡片样式 */
.feature-icon {
    transition: var(--transition);
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    box-shadow: var(--neon-shadow);
    color: var(--text-light);
    font-size: 2rem;
}

.card {
    transition: var(--transition);
    border: none;
    border-radius: var(--border-radius);
    overflow: hidden;
    background: rgba(45, 45, 45, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(76, 175, 80, 0.2);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--neon-shadow-hover), 0 15px 40px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(76, 175, 80, 0.5);
}

.card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--neon-shadow-hover);
}

/* 按钮样式 */
.btn {
    border-radius: var(--border-radius);
    font-weight: 600;
    padding: 0.875rem 1.75rem;
    transition: var(--transition);
    border: none;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: 0.5s;
    z-index: -1;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), var(--primary-dark));
    border: none;
    box-shadow: var(--neon-shadow);
}

.btn-primary:hover {
    background: linear-gradient(45deg, var(--primary-light), var(--primary-color));
    transform: translateY(-3px);
    box-shadow: var(--neon-shadow-hover), 0 6px 20px rgba(0, 0, 0, 0.4);
}

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
    box-shadow: var(--neon-shadow);
}

.btn-outline-primary:hover {
    background: linear-gradient(45deg, var(--primary-color), var(--primary-dark));
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--neon-shadow-hover);
    border: 2px solid var(--primary-light);
}

/* 页脚样式 */
footer {
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
    border-top: 1px solid rgba(111, 66, 193, 0.2);
}

footer h5, footer h6 {
    color: var(--text-light) !important;
    text-shadow: 0 0 10px rgba(111, 66, 193, 0.3);
}

footer a {
    transition: var(--transition);
    color: var(--text-light) !important;
}

footer a:hover {
    color: var(--secondary-color) !important;
    text-shadow: 0 0 10px rgba(0, 198, 255, 0.5);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-section {
        padding: 3rem 0;
    }
    
    .hero-section h1 {
        font-size: 2.8rem;
    }
    
    .hero-section .lead {
        font-size: 1.2rem;
    }
    
    .navbar-brand {
        font-size: 1.3rem;
    }
    
    .card {
        margin-bottom: 1.5rem;
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
}

@media (max-width: 576px) {
    .hero-section {
        text-align: center;
        padding: 2rem 0;
    }
    
    .hero-section h1 {
        font-size: 2.2rem;
    }
    
    .hero-section .lead {
        font-size: 1rem;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 0.75rem;
        padding: 0.75rem 1.25rem;
    }
    
    .feature-icon {
        margin-bottom: 1rem;
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
    
    .navbar-nav .nav-link {
        text-align: center;
        margin: 0.25rem 0;
    }
}

/* 工具类 */
.text-shadow {
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

/* 新增：加载动画 */
.loading-spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    vertical-align: text-bottom;
    border: 0.2em solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spinner-border 0.75s linear infinite;
}

@keyframes spinner-border {
    to { transform: rotate(360deg); }
}

/* 新增：图片占位符样式 */
.placeholder-image {
    background: linear-gradient(45deg, #f0f0f0, #e0e0e0);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
}

/* 新增：表单验证样式 */
.form-control.is-invalid {
    border-color: var(--danger-color);
}

.invalid-feedback {
    display: block;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 0.875em;
    color: var(--danger-color);
}

/* 新增：动画效果 */
.fade-in-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

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

/* 新增：回到顶部按钮样式 */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: none;
    z-index: 1000;
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
    transition: var(--transition);
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 123, 255, 0.4);
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-color), #0056b3);
}

.bg-gradient-dark {
    background: linear-gradient(135deg, var(--dark-color), #2c3e50);
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.pulse {
    animation: pulse 2s infinite;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #0056b3;
}