/* 全局样式 */
:root {
  --primary-color: #4A90E2;
  --secondary-color: #50E3C2;
  --accent-color: #F5A623;
  --text-color: #4A4A4A;
  --light-bg: #F8F9FA;
  --dark-bg: #2C3E50;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: var(--text-color);
    overflow-x: hidden;
    min-width: 320px;
}

/* 12栅格系统 */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}

.col-1 { width: 8.33%; }
.col-2 { width: 16.66%; }
.col-3 { width: 25%; }
.col-4 { width: 33.33%; }
.col-6 { width: 50%; }
.col-8 { width: 66.66%; }
.col-9 { width: 75%; }
.col-12 { width: 100%; }

/* 头部样式优化 */
header {
    background-color: var(--dark-bg);
    padding: 15px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    padding: 10px var(--container-padding);
}

.logo {
    font-size: 28px;
    font-weight: bold;
    color: white;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 8px 15px;
    margin: 0 5px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

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

/* 主要内容区域样式 */
main {
    padding: 40px 0;
    min-height: calc(100vh - 180px);
}

section {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.1);
    padding: 25px;
    margin-bottom: 30px;
}

/* 页脚样式 */
footer {
    background-color: var(--dark-bg);
    color: white;
    padding: 20px 0;
    text-align: center;
    position: relative;
}

/* 特定页面样式优化 */
.gallery-images {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    padding: 20px;
}

.gallery-img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.gallery-img:hover {
    transform: scale(1.05);
}

/* 表单样式优化 */
.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px;
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.contact-form input[type="submit"] {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 25px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.contact-form input[type="submit"]:hover {
    background-color: #357ABD;
}

/* 响应式布局基础设置 */
* {
    box-sizing: border-box;
}

/* 移动优先的媒体查询断点 */
:root {
    --container-padding: 15px;
    --header-height: 60px;
}

/* 基础样式优化 */
body {
    /* ... 保持现有样式 ... */
    overflow-x: hidden;
    min-width: 320px;
}

/* 响应式头部导航 */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    padding: 10px var(--container-padding);
}

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

/* 汉堡菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.menu-toggle span {
    width: 100%;
    height: 3px;
    background-color: white;
    transition: all 0.3s ease;
}

/* 导航菜单响应式调整 */
nav {
    display: flex;
    align-items: center;
}

/* 移动端样式 */
@media screen and (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background-color: var(--dark-bg);
        flex-direction: column;
        padding: 80px 20px;
        transition: right 0.3s ease;
    }

    nav.active {
        right: 0;
    }

    nav a {
        margin: 10px 0;
        width: 100%;
        text-align: center;
    }

    .logo {
        font-size: 20px;
    }

    /* 画廊图片响应式调整 */
    .gallery-images {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 10px;
        padding: 10px;
    }

    .gallery-img {
        height: 150px;
    }

    /* 表单响应式调整 */
    .contact-form input,
    .contact-form textarea {
        padding: 8px;
        margin-bottom: 15px;
    }

    /* 栅格系统移动端优化 */
    [class*="col-"] {
        width: 100%;
        padding: 0 var(--container-padding);
    }
}

/* 平板端样式 */
@media screen and (min-width: 769px) and (max-width: 1024px) {
    .gallery-images {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }

    .gallery-img {
        height: 200px;
    }

    /* 平板端栅格系统优化 */
    .col-md-6 { width: 50%; }
    .col-md-12 { width: 100%; }
}