I've created a systematic approach to CSS development. This way I can utilize a standard that never changes. First I started with the 960 grid system. Then I created single lines of css for basic layouts, margins, padding, fonts and sizes. I then string them together as needed. This allows me to keep a consistent layout across all of my projects and utilize the same css files over and over. Because they are not specific. Here's an example: ----div class="c12 bg0 m10 p5 white fl"/div--- This means that the container is 12 columns across, utilizes bg0 has margins of 10px padding of 5 the text is white and it floats left. I could easily change this by removing or adding a new - What I call a "light" style- Instead of creating a single class with all these attributes; I simply combine the single styles as I code the page. This allows me to create any combination of styles and does not limit my creativity or cause me to create a massive number of styles that are similar. Your style sheets become a lot more manageable, minimized and allow you to re-use it over and over. This method I have found to be fantastic for rapid design. I also no longer design first in PSD but in the browser which also saves time. In addition because I have also created a naming system for my backgrounds and page design attributes I simply change out my image file when creating a new project.(bg0 = body background according to my naming system) That means that if I previously had a white background with one project simply changing it to black simply means that on the next project bg0 will be a black background or another image..... I have not found anything wrong with this method yet and it seems to work very well.

你想要两个世界。

您需要多个CSS文件，因为浪费您的理智是一件可怕的事情。

同时，最好有一个单一的大文件。

解决方案是使用某种机制将多个文件合并为一个文件。

一个例子是

<link rel="stylesheet" type="text/css" href="allcss.php?files=positions.css,buttons.css,copy.css" />

然后，allcss.php脚本处理连接文件并传递它们。

理想情况下，脚本会检查所有文件的mod日期，如果其中任何一个文件发生变化，则创建一个新的组合，然后返回该组合，然后检查if - modified HTTP头，以便不发送多余的CSS。

这让你两全其美。也适用于JS。

我更喜欢在开发过程中使用多个CSS文件。这样管理和调试就容易得多。但是，我建议你在部署时使用像YUI Compressor这样的CSS缩小工具，它可以将你的CSS文件合并成一个整体文件。

你可以只使用一个css文件来提高性能，然后像这样注释掉部分:

/******** Header ************/
//some css here

/******* End Header *********/


/******** Footer ************/
//some css here

/******* End Footer *********/

etc

以下是最好的方法:

创建一个包含所有共享代码的通用CSS文件 将所有特定页面的CSS代码插入到同一页面中，在标签上或对每个页面使用属性style=""

通过这种方式，您只有一个包含所有共享代码的CSS和一个HTML页面。 顺便说一下(我知道这不是正确的主题)，你也可以在base64编码你的图像(但你也可以用你的js和CSS文件)。通过这种方式，您可以将更多的HTTP请求减少到1。

SASS和LESS使这一切都成为一个有争议的问题。开发人员可以建立有效的组件文件，并在编译时将它们全部组合起来。在SASS中，您可以在开发过程中关闭压缩模式以方便阅读，并在生产过程中切换回来。

http://sass-lang.com http://lesscss.org

最后，不管你使用什么技术，一个简化的CSS文件就是你想要的。更少的CSS，更少的HTTP请求，更少的服务器需求。