Useobject-fitormax-widthwithheight:autotopreventimagedistortion;object-fitcontrolshowimagesfillcontainerswhilepreservingaspectratios,andmax-width:100%;height:autoensuresresponsivescalingwithoutstretching.

clamp() function realizes responsive font scaling through the minimum, preferred and maximum values; 2. The syntax is clamp (minimum value, preferred value, maximum value), and commonly used rem and vw units; 3. The font takes the minimum value on the small screen, and scales according to vw as the screen increases, and does not exceed the maximum value; 4. Reasonably select the numerical value to ensure readability and avoid being too large or too small; 5. Combining the rem type proportion to improve design consistency.

1. Open the web page printing interface, click "More Settings" and uncheck "Header and Footer" to remove automatically added URLs, dates and other information. 2. By adding the CSS style of @mediaprint{@page{margin:0}} to the web page code, the default margins and headers and footers can be cleared. 3. Install third-party printing extensions such as PrintEdit, which can edit print content more flexibly and disable the default header and footer.

Use aspect-ratio:1/1 to create a responsive square, and set the aspect ratio in modern browsers; if you need to be compatible with old browsers, you can use padding-top:100% technique to maintain the consistency of width and height by relative units; you can also use vw units to make the square change with the viewport.

Use backdrop-filter:blur() to achieve the frosted glass effect, combining rgba transparent background, thin borders and rounded corners, such as .frosted-card{backdrop-filter:blur(10px);background-color:rgba(255,255,255,0.1);border:1pxsolidrgba(255,255,255,0.2);border-radius:12px;padding:20px;}, be sure to ensure that there is content behind the elements and pay attention to browser compatibility.

Responsive design is implemented through media query, first defining the minimum width condition for mobile priority, then gradually adapting to the tablet and desktop, combining range, direction and resolution to optimize the layout.

Use transform:rotate() to achieve element rotation, support units such as deg, adjust the rotation center through transform-origin, and combine transition to achieve smooth animation effect.

Use the attribute selector to select elements with a specific data attribute, such as [data-status] select all elements containing the attribute, and [data-status="active"] select elements with the value active.