/* public.css - 全站公共样式 */

/* ==================== CSS变量定义 ==================== */
:root {
    /* 主题色 */
    --primary-color: #1a6bb3;
    --primary-dark: #0d4d8c;
    --secondary-color: #28a745;
    
    /* 文字颜色 */
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --gray-color: #6c757d;
    --light-gray: #e9ecef;
    
    /* 交互效果 */
    --transition: all 0.3s ease;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    --box-shadow-hover: 0 15px 30px rgba(0, 0, 0, 0.12);
    --border-radius: 8px;
    
    /* 品牌色 */
    --wechat-green: #09bb07;
    --jing-dong-color: #F10215;
    --tian-mao-color: #C9001D;
    --dou-yin-color: #FF2D55;
    
    /* 返回顶部按钮 */
    --zf-rb-btn-w: 40px;
    --zf-rb-btn-font: 24px;
}

/* ==================== 全局重置 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    overflow-x: hidden;
    background-color: #fff;
}

/* ==================== 标题样式 ==================== */
h1, h2, h3, h4, h5, h6 {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-weight: 600;
    margin-bottom: 1rem;
    line-height: 1.3;
    color: var(--dark-color);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

h5 {
    font-size: 1rem;
}

h6 {
    font-size: 0.875rem;
}
/* ==================== banner h1 文字 ==================== */
.banner-content h1 {
	color: #ffffff;
}

/* ==================== 链接样式 ==================== */
a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

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

/* ==================== 列表样式 ==================== */
ul, ol {
    list-style: none;
    padding: 0;
    margin: 0;
}

/* ==================== 图片样式 ==================== */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ==================== 按钮样式 ==================== */
.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--primary-color);
    color: white;
    border-radius: var(--border-radius);
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-size: 16px;
    text-align: center;
}

.btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--box-shadow);
    color: white;
}

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

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

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

.btn-secondary:hover {
    background-color: #218838;
}

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

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

.btn-outline-white {
    background-color: transparent;
    border: 2px solid white;
    color: white;
}

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

.btn-sm {
    padding: 8px 20px;
    font-size: 14px;
}

.btn-lg {
    padding: 15px 40px;
    font-size: 18px;
}

/* ==================== 容器样式 ==================== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-fluid {
    width: 100%;
    padding: 0 20px;
}

/* ==================== 区块样式 ==================== */
.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--dark-color);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    width: 70px;
    height: 3px;
    background-color: var(--primary-color);
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
}

.section-title p {
    font-size: 1.1rem;
    color: var(--gray-color);
    max-width: 600px;
    margin: 0 auto;
}

/* ==================== 文字样式 ==================== */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.text-primary {
    color: var(--primary-color);
}

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

.text-muted {
    color: var(--gray-color);
}

.text-white {
    color: white;
}

/* ==================== 背景样式 ==================== */
.bg-primary {
    background-color: var(--primary-color);
}

.bg-light {
    background-color: var(--light-color);
}

.bg-dark {
    background-color: var(--dark-color);
}

.bg-white {
    background-color: white;
}

/* ==================== 间距样式 ==================== */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }

.pt-0 { padding-top: 0; }
.pt-1 { padding-top: 0.5rem; }
.pt-2 { padding-top: 1rem; }
.pt-3 { padding-top: 1.5rem; }
.pt-4 { padding-top: 2rem; }
.pt-5 { padding-top: 3rem; }

.pb-0 { padding-bottom: 0; }
.pb-1 { padding-bottom: 0.5rem; }
.pb-2 { padding-bottom: 1rem; }
.pb-3 { padding-bottom: 1.5rem; }
.pb-4 { padding-bottom: 2rem; }
.pb-5 { padding-bottom: 3rem; }

/* ==================== 显示隐藏 ==================== */
.d-none { display: none; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

/* ==================== Flex布局 ==================== */
.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

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

.flex-wrap {
    flex-wrap: wrap;
}

/* ==================== 卡片样式 ==================== */
.card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    transition: var(--transition);
}

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

.card-body {
    padding: 20px;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.card-text {
    color: var(--gray-color);
    line-height: 1.6;
}

/* ==================== 表单样式 ==================== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark-color);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius);
    font-size: 16px;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 107, 179, 0.1);
}

/* ==================== 分隔线 ==================== */
hr {
    border: none;
    border-top: 1px solid var(--light-gray);
    margin: 30px 0;
}

.divider {
    width: 100%;
    height: 1px;
    background-color: var(--light-gray);
    margin: 40px 0;
}

/* ==================== 响应式断点 ==================== */
/* 超大屏幕 (≥1200px) */
@media (min-width: 1200px) {
    .container {
        max-width: 1280px;
    }
}

/* 大屏幕 (≥992px) */
@media (min-width: 992px) {
    .d-lg-none { display: none; }
    .d-lg-block { display: block; }
}

/* 中等屏幕 (≥768px) */
@media (min-width: 768px) {
    .d-md-none { display: none; }
    .d-md-block { display: block; }
}

/* 小屏幕 (≥576px) */
@media (min-width: 576px) {
    .d-sm-none { display: none; }
    .d-sm-block { display: block; }
}

/* 超小屏幕 (<576px) */
@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    .section {
        padding: 40px 0;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    h3 {
        font-size: 1.25rem;
    }
    
    .section-title h2 {
        font-size: 1.8rem;
    }
    
    .btn {
        padding: 10px 25px;
        font-size: 14px;
    }
}

/* 中等屏幕 (<768px) */
@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }
    
    h1 {
        font-size: 2.2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
}

/* ==================== 动画效果 ==================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

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

.fade-in {
    animation: fadeIn 0.5s ease;
}

.slide-up {
    animation: slideUp 0.5s ease;
}

.slide-down {
    animation: slideDown 0.5s ease;
}

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

::-webkit-scrollbar-track {
    background: var(--light-gray);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--dark-color);
}

/* ==================== 选择文本样式 ==================== */
::selection {
    background-color: var(--primary-color);
    color: white;
}

::-moz-selection {
    background-color: var(--primary-color);
    color: white;
}