/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: "Microsoft YaHei",SimSun,sans-serif;
    background-color: #f1f2f5;
    font-size: 14px;
    color: #333;
    line-height: 1.7;
}
a {
    text-decoration: none;
    color: #2378dd;
}
a:hover {
    color: #f60;
}
ul,li {
    list-style: none;
}
input,textarea,select {
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 8px 10px;
    font-size: 14px;
    outline: none;
    font-family: inherit;
}
button {
    background: #2378dd;
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 8px 18px;
    cursor: pointer;
}
button:hover {
    background: #1966c2;
}

/* 头部横幅LOGO */
.header-banner {
    width: 100%;
    height: 120px;
    background: #2378dd;
    background-image: linear-gradient(135deg,#2378dd,#4093ee);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 32px;
    font-weight: bold;
    text-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

/* 导航栏 */
.topnav {
    background: #fff;
    border-bottom: 1px solid #e5e5e5;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    padding: 0 30px;
}
.topnav a {
    display: inline-block;
    padding: 12px 16px;
    color: #555;
    font-size: 14px;
}
.topnav a:hover {
    background: #f5f7fa;
    color: #2378dd;
}
h3 {
    font-size: 20px;
    border-left: 5px solid #3683e6;
    padding-left: 15px;
    margin-bottom: 25px;
    color: #333;
}
/* 容器主体 */
.container {
    /*max-width: 1200px;*/
    margin: 25px auto;
    padding: 0 0px;
}

/* 分区卡片 */
.cate-box {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    margin-bottom: 20px;
    overflow: hidden;
}
.cate-box h3 {
    background: #f7f8fa;
    padding: 12px 20px;
    font-size: 16px;
    color: #222;
    border-bottom: 1px solid #eee;
}

/* 板块条目 */
.forum-item {
    padding: 15px 20px;
    border-bottom: 1px solid #f0f0f0;
}
.forum-item:last-child {
    border-bottom: none;
}
.forum-item a {
    font-size: 15px;
    font-weight: 500;
}
.forum-item p {
    font-size: 12px;
    color: #999;
    margin-top: 4px;
}

/* 帖子列表项 */
.thread-item {
    background: #fff;
    padding: 14px 18px;
    border-radius: 6px;
    margin-bottom: 10px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}

/* 置顶精华标签 */
.top {
    color: #f60;
    font-weight: bold;
    margin-right: 6px;
}
.best {
    color: #00b96b;
    font-weight: bold;
    margin-right: 6px;
}

/* 帖子详情内容 */
.thread-content {
    background: #fff;
    padding: 25px;
    border-radius: 8px;
    margin: 15px 0;
    box-shadow: 0 2px 6px rgba(0,0,0,0.06);
    font-size: 15px;
}

/* 评论条目 */
.cmt-item {
    background: #fff;
    padding: 14px 18px;
    border-radius: 6px;
    margin-bottom: 10px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}
.cmt-item a {
    font-size: 12px;
    color: #999;
    margin-left: 10px;
}

/* 楼中楼回复 */
.cmt-sub {
    margin-left: 30px;
    margin-top: 8px;
    padding: 10px 12px;
    background: #f7f8fa;
    border-radius: 6px;
    font-size: 13px;
    color: #666;
}

/* 表单页面 登录/注册/发帖 */
.container form {
    background: #fff;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.07);
    /*max-width: 600px;*/
    margin: 0 auto;
}
.container form input,
.container form textarea {
    width: 100%;
    margin: 8px 0 15px;
}

/* 个人中心、私信、通知页面 */
.container > div {
    background: #fff;
    padding: 5px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.07);
    margin-bottom: 15px;
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 20px;
    color: #999;
    font-size: 13px;
    margin-top: 30px;
}

/* 自适应手机 */
@media(max-width:768px){
    .header-banner {
        height: 80px;
        font-size: 22px;
    }
    .topnav a {
        padding: 10px 8px;
        font-size: 13px;
    }
    .container {
        margin: 15px auto;
    }
}