diff --git a/src/install/install.html b/src/install/install.html
index 20c1fcfd..b63e0dc1 100644
--- a/src/install/install.html
+++ b/src/install/install.html
@@ -28,66 +28,68 @@
 			</div>
 		</div>
 		<div class="install-box my-3">
-			<?php if (count($arrMsg) > 0) {foreach($arrMsg as $msg){?>
-			<div class="alert alert-warning"><?php echo $msg ?></div>
-			<?php }}?>
-			<div class="alert alert-success">安装前请先阅读<a href="https://www.dedebiz.com/license?from=install" target="_blank">《站点授权协议》</a></div>
-			<div id="dbinfo"></div>
-			<div class="card shadow-sm">
-				<div class="card-header text-center">
-					<h1>安装Dedev<?php echo $cfg_version_detail;?></h1>
-				</div>
-				<div class="card-body">
-					<form name="form1" action="/install/index.php" method="post">
-						<input type="hidden" name="step" value="2">
-						<input type="hidden" name="cookieencode" value="<?php echo $rnd_cookieEncode;?>">
-						<input type="hidden" name="adminmail" value="admin@dedebiz.com">
-						<div class="form-group">
-							<label for="dbtype" class="form-label">数据库类型</label>
-							<select id="dbtype" name="dbtype" class="form-control form-select">
-								<option value="mysql" selected>MySQL</option>
-								<?php if (extension_loaded("sqlite3")) {;?><option value="sqlite">SQLite</option><?php }?>
-							</select>
-						</div>
-						<div class="form-group server">
-							<label for="dbhost" class="form-label">数据库地址</label>
-							<input type="text" name="dbhost" id="dbhost" class="form-control" placeholder="localhost">
-						</div>
-						<div class="form-group server">
-							<label for="dbuser" class="form-label">数据库账号</label>
-							<input type="text" name="dbuser" id="dbuser" class="form-control" placeholder="root">
-						</div>
-						<div class="form-group server">
-							<label for="dbpwd" class="form-label">数据库密码</label>
-							<input type="text" name="dbpwd" id="dbpwd" class="form-control" placeholder="请输入数据库密码" required>
-						</div>
-						<div class="form-group">
-							<label for="dbprefix" class="form-label">数据表前缀</label>
-							<input type="text" name="dbprefix" id="dbprefix" class="form-control" placeholder="biz_">
-						</div>
-						<div class="form-group">
-							<label for="dbname" class="form-label">数据库名称</label>
-							<div class="input-group">
-								<input type="text" name="dbname" id="dbname" class="form-control" placeholder="DedeBIZ">
-								<div class="input-group-append"><button type="button" id="dbtip" class="btn btn-success">检查</button></div>
+			<div class="container">
+				<?php if (count($arrMsg) > 0) {foreach($arrMsg as $msg){?>
+				<div class="alert alert-warning"><?php echo $msg ?></div>
+				<?php }}?>
+				<div class="alert alert-success">安装前请先阅读<a href="https://www.dedebiz.com/license?from=install" target="_blank">《站点授权协议》</a></div>
+				<div id="dbinfo"></div>
+				<div class="card shadow-sm">
+					<div class="card-header text-center">
+						<h1>安装Dedev<?php echo $cfg_version_detail;?></h1>
+					</div>
+					<div class="card-body">
+						<form name="form1" action="/install/index.php" method="post">
+							<input type="hidden" name="step" value="2">
+							<input type="hidden" name="cookieencode" value="<?php echo $rnd_cookieEncode;?>">
+							<input type="hidden" name="adminmail" value="admin@dedebiz.com">
+							<div class="form-group">
+								<label for="dbtype" class="form-label">数据库类型</label>
+								<select id="dbtype" name="dbtype" class="form-control form-select">
+									<option value="mysql" selected>MySQL</option>
+									<?php if (extension_loaded("sqlite3")) {;?><option value="sqlite">SQLite</option><?php }?>
+								</select>
 							</div>
-						</div>
-						<div class="form-group">
-							<label for="webname" class="form-label">网站名称</label>
-							<input type="text" name="webname" id="webname" class="form-control" placeholder="我的网站">
-						</div>
-						<div class="form-group">
-							<label for="adminuser" class="form-label">管理员账号</label>
-							<input type="text" name="adminuser" id="adminuser" class="form-control" placeholder="admin" onkeyup="this.value=this.value.replace(/[^0-9a-zA-Z_@!\.-]/g,'');">
-							<small class="form-text text-black-50">请使用数字0-9小写a-z大写A-Z符号_@!.-</small>
-						</div>
-						<div class="form-group">
-							<label for="adminpwd" class="form-label">管理员密码</label>
-							<input type="text" name="adminpwd" id="adminpwd" class="form-control" placeholder="admin" onkeyup="this.value=this.value.replace(/[^0-9a-zA-Z_@!\.-]/g,'');">
-							<small class="form-text text-black-50">请使用数字0-9小写a-z大写A-Z符号_@!.-</small>
-						</div>
-						<div class="text-center"><button type="submit" class="btn btn-success">安装</button></div>
-					</form>
+							<div class="form-group server">
+								<label for="dbhost" class="form-label">数据库地址</label>
+								<input type="text" name="dbhost" id="dbhost" class="form-control" placeholder="localhost">
+							</div>
+							<div class="form-group server">
+								<label for="dbuser" class="form-label">数据库账号</label>
+								<input type="text" name="dbuser" id="dbuser" class="form-control" placeholder="root">
+							</div>
+							<div class="form-group server">
+								<label for="dbpwd" class="form-label">数据库密码</label>
+								<input type="text" name="dbpwd" id="dbpwd" class="form-control" placeholder="请输入数据库密码" required>
+							</div>
+							<div class="form-group">
+								<label for="dbprefix" class="form-label">数据表前缀</label>
+								<input type="text" name="dbprefix" id="dbprefix" class="form-control" placeholder="biz_">
+							</div>
+							<div class="form-group">
+								<label for="dbname" class="form-label">数据库名称</label>
+								<div class="input-group">
+									<input type="text" name="dbname" id="dbname" class="form-control" placeholder="DedeBIZ">
+									<div class="input-group-append"><button type="button" id="dbtip" class="btn btn-success">检查</button></div>
+								</div>
+							</div>
+							<div class="form-group">
+								<label for="webname" class="form-label">网站名称</label>
+								<input type="text" name="webname" id="webname" class="form-control" placeholder="我的网站">
+							</div>
+							<div class="form-group">
+								<label for="adminuser" class="form-label">管理员账号</label>
+								<input type="text" name="adminuser" id="adminuser" class="form-control" placeholder="admin" onkeyup="this.value=this.value.replace(/[^0-9a-zA-Z_@!\.-]/g,'');">
+								<small class="form-text text-black-50">请使用数字0-9小写a-z大写A-Z符号_@!.-</small>
+							</div>
+							<div class="form-group">
+								<label for="adminpwd" class="form-label">管理员密码</label>
+								<input type="text" name="adminpwd" id="adminpwd" class="form-control" placeholder="admin" onkeyup="this.value=this.value.replace(/[^0-9a-zA-Z_@!\.-]/g,'');">
+								<small class="form-text text-black-50">请使用数字0-9小写a-z大写A-Z符号_@!.-</small>
+							</div>
+							<div class="text-center"><button type="submit" class="btn btn-success">安装</button></div>
+						</form>
+					</div>
 				</div>
 			</div>
 		</div>
diff --git a/src/static/web/css/admin.css b/src/static/web/css/admin.css
index 00fb2e1a..ff017783 100644
--- a/src/static/web/css/admin.css
+++ b/src/static/web/css/admin.css
@@ -27,7 +27,7 @@ input:focus,select:focus,textarea:focus{color:var(--gray);background:var(--white
 .install-head{padding:1rem 0;background:var(--white)}
 .install-head .logo{font-size:18px;font-weight:600;color:var(--gray-dark)}
 .install-head .logo img,.login-box .logo img{margin-right:0.5rem;height:36px}
-.install-box{margin:0 auto;padding:0 1rem;width:750px}
+.install-box{margin:0 auto;width:750px}
 .install-box .card-header,.install-box .card-body{padding:1.25rem}
 .install-box h1{margin:0;line-height:1.2;font-size:18px;font-weight:600;color:var(--gray-dark)}
 .install-box label{margin-bottom:0.25rem}