代写网页设计作业要求，学生需创建包含HTML和CSS的网页，展示高级CSS技巧和语义化HTML结构。作业要求建立规范的项目目录（含HTML文件、CSS样式等）。
Requirement
This assignment provides an opportunity to develop a sophisticated webpage demonstrating mastery of CSS styling techniques while building upon fundamental HTML knowledge. The exercise focuses on implementing advanced visual design principles through cascading style sheets to create an engaging, well-structured web document.
Project Foundation and Setup
Students should begin by establishing a organized project workspace. Creating a dedicated directory called pex4_project will help maintain all exercise files in one location. This directory needs to contain the primary HTML document named pex4.html, a CSS stylesheet named stylePex4.css, and an images subfolder for visual assets. The HTML document requires proper DOCTYPE declaration and complete document structure, including essential metadata in the head section that specifies character encoding, viewport settings, and links the external stylesheet using relative paths.
Content Structure Requirements
The webpage should demonstrate proper use of semantic HTML elements to create meaningful document structure. A clearly defined header section establishes the page identity, while the main content area should be logically divided into distinct sections. The footer must contain appropriate copyright information and attribution for any used resources. The content needs to include at least one properly formatted data table for presenting structured information and multiple figures with images and descriptive captions. Various text elements including headings, paragraphs, and lists should be incorporated to create rich textual content.
Comprehensive CSS Implementation
The stylesheet should showcase proficiency with multiple CSS features through careful implementation. Selector mastery becomes evident through appropriate use of different selector types applied to various HTML elements. Visual design systems emerge through thoughtful application of background treatments, border styles, and shadow effects that create depth and visual interest. Typographic systems establish hierarchy and readability through deliberate font choices, size relationships, and spacing decisions that guide the reader through the content.
Detailed Section Requirements
The header section serves as the visual introduction to the webpage, requiring attractive styling that establishes the site’s identity. The main content areas should be divided into distinct sections that each demonstrate specific CSS capabilities. A typography showcase provides space for experimenting with various font treatments and text effects. The color systems laboratory offers opportunities to explore color theory and different color notation methods. Layout experiments can demonstrate practical applications of various CSS positioning and display techniques.
Data presentation areas should include comprehensive displays of numeric conversions between different base systems, with particular attention to proper formatting of mathematical notations. The color reference chart needs to present an organized collection of color swatches showing multiple notation formats and relationships between colors. Interactive elements bring the page to life through responsive hover states, focus indicators, and subtle animations that enhance user engagement without distracting from the content.
Technical Implementation Details
The CSS file organization should follow a logical progression from basic resets through increasingly specific styling rules. Advanced techniques like CSS custom properties and calculated values demonstrate sophisticated styling approaches. The visual design requires development of a cohesive color scheme that includes primary, secondary, and neutral tones with attention to accessibility requirements. A consistent spacing system based on typographic rhythm creates visual harmony throughout the layout. All images need proper styling with consideration for responsive behavior and accessibility.
Technical Requirements
Code quality standards demand valid, well-structured markup and standards-compliant CSS with clear organization and consistent formatting. Accessibility considerations must be evident throughout the document structure and interactive elements. Performance optimization requires efficient CSS selectors and properly sized assets to ensure quick loading. Thorough testing across different browsers and devices verifies consistent rendering and proper functionality of all elements.
The exercise culminates with students validating their code using official W3C validation tools to identify and correct any errors or warnings. Proper file organization ensures all resources can be accessed through relative paths, and the final submission consists of uploading all files to a web server while providing only the main HTML file URL for assessment. This comprehensive approach ensures students develop practical skills in creating visually appealing, well-structured web documents using modern HTML and CSS techniques.