docs: add screenshots and more comments

Author: memset0

README.md

@@ -1,17 +1,23 @@
 # ZJU-Project-Report-Template
 
-Typst is a new text markup language, considered the successor of LaTeX. This is yet another Zhejiang University project report template written in Typst, mainly designed for the course "Fundamentals of Data Structures (211C0020)".
+Typst is a new text markup language, considered the successor of LaTeX. This is yet another Zhejiang University project report template written in Typst, mainly designed for the course "Fundamentals of Data Structures (211C0020)" and "Digital Logic Design	(211C0060)".
 
-**Reminder**: Due to course requirements, you are prohibited to disclose personal information in your submission. Use this project at your own risk.
+**Reminder**: Due to requirements of some specific courses, disclosing personal information is prohibited and will be punished. So use this project at your own risk.
 
 ## Configuration
 
 ### Theme
 
 Currently, I have provided two themes, corresponding to common lab reports and project reports in ZJU's Computer Science courses.
 
+|          `theme: project`           |            `theme: lab`            |
+| :---------------------------------: | :--------------------------------: |
+| ![](./screenshots/fds_report_1.png) | ![](./screenshots/dd_report_1.png) |
+| ![](./screenshots/fds_report_2.png) | ![](./screenshots/dd_report_2.png) |
+| ![](./screenshots/fds_report_3.png) | ![](./screenshots/dd_report_3.png) |
+
 ### Fonts
 
 I have configured default fallback options for serif, sans-serif, and monospace fonts, which you can modify using the `font_serif`, `font_sans_serif`, and `font_mono` arguments.
 
-However, for better rendering experiences, font family `New Computer Modern` and `Source Han Serif SC` are preferred.
+However, for better rendering experiences, Chineses font families that support arbitrary levels of font weight, such as [`Source Han Serif SC`](https://github.com/adobe-fonts/source-han-serif/releases/tag/2.002R), is recommanded.

examples/dd/report.typ

@@ -1,6 +1,7 @@
 #import "../../template.typ": *
 
 #show: project.with(
+  theme: "lab",
   course: "数字逻辑设计",
   title: "数字逻辑设计 实验报告",
   semester: "2023-2024 Spring & Summer",
@@ -10,7 +11,6 @@
   college: "计算机科学与技术学院",
   major: "计算机科学与技术",
   teacher: "某老师",
-  theme: "lab",
 )
 
 #lab_header(name: "Lab1: 第一次实验", place: "紫金港 东x-xxx", date: "20xx年xx月xx日")

examples/fds/documents/report.typ

@@ -1,6 +1,7 @@
 #import "../../../template.typ": *
 
 #show: project.with(
+  theme: "project",
   course: "Fundamentals of Data Structures",
   title: "Projects 1: ???",
   date: "2024/03/14",

screenshots/dd_report_1.png

@@ -23,7 +23,7 @@
 }
 
 #let project(
-  theme: "ds",
+  theme: "project",
   course: "<course>",
   title: "<title>",
   title_size: 3em,
@@ -53,7 +53,7 @@
     if (language == none) {
       language = "cn"
     }
-  } else if (theme == "ds") {
+  } else if (theme == "project") {
     if (cover_image_size == none) {
       cover_image_size = 50%
     }
@@ -125,7 +125,7 @@
     ])
     v(2fr)
     pagebreak()
-  } else if (theme == "ds") {
+  } else if (theme == "project") {
     v(1fr)
     box(
       width: 100%,