/* ========== 全局基础样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    min-height: 100%;
}

body {
    overflow-y: scroll;
    min-height: 100%;
    margin: 0;
    padding: 0;
    background-color: #e5e5e5;
    background-image: url('/static/images/bg.png');
    background-position: left top;
    background-size: auto;
    background-repeat: repeat;
    background-attachment: scroll;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

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

/* ========== 页面容器 ========== */
#page {
    min-height: 95vh;
    width: 70%;
    min-width: 970px;
    max-width: 1200px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

/* ========== 顶部横幅（默认图片横幅） ========== */
#topTitle {
    min-width: 890px;
    width: 100%;
    margin: 0;
    padding: 0;
}

/* 图片横幅样式（IoT/BDW项目站使用） */
#topTitle img.banner-image {
    width: 100%;
    height: auto;
    display: block;
}

/* ========== 导航栏基础 ========== */
#guide {
    position: relative;
    top: -50px;
    width: 100%;
    min-width: 890px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    margin: 0;
}

.guideLink {
    float: left;
    margin-top: 12px;
    text-align: center;
    text-decoration: none;
    transition: color 0.3s ease;
}

.guideLink:hover,
.guideLink.active {
    color: rgb(255, 255, 255);
}

.guideLink.active {
    color: red;
    text-shadow: 5px 5px 5px #000000;
}

/* ========== 内容区域 ========== */
#content {
    width: 70%;
    min-width: 900px;
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

/* ========== 表格布局（用于项目页面） ========== */
.content-table {
    width: 100%;
    margin: 20px 0;
}

.content-table tr.subtitle {
    height: 80px;
}

.content-table td.subtitle {
    width: 60%;
    font-size: 30px;
    font-family: 'Times New Roman', Times, serif;
    font-weight: 400;
    vertical-align: top;
}

.content-table p.subtitle {
    font-size: 30px;
    font-family: 'Times New Roman', Times, serif;
    font-weight: 400;
}

.content-table td.space {
    width: 1%;
}

.content-table td.content {
    text-align: justify;
    text-justify: inter-ideograph;
    vertical-align: top;
    line-height: 1.8;
}

.content-table td.content p {
    margin-bottom: 15px;
}

.content-table td.pic {
    padding-top: 2%;
    vertical-align: top;
}

.content-table td.pic img {
    width: 99%;
    display: block;
}

.content-table tr.divide {
    height: 30px;
}

/* ========== 页脚 ========== */
#bottom {
    height: 40px;
    line-height: 40px;
    width: 100%;
    text-align: center;
    font-family: Arial, sans-serif;
    font-size: 12px;
    letter-spacing: 1px;
    margin-top: 40px;
}

/* ========== 辅助类 ========== */
.clear {
    clear: both;
}