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carsi.edu.cn

https://carsi.edu.cn· First analyzed 01 Jun 2026· Updated 01 Jun 2026
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carsi.edu.cn
Desktop screenshot of carsi.edu.cn
Mobile screenshot of carsi.edu.cn
Mobile

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Hosting Provider

CERNET

IP Address

115.27.243.10

Site Location

🇨🇳 Chinavia tld

Server Location

🇨🇳 Beijing, China

ASN

AS24349

Server

Nginx

Nameservers

ns.PKU.edu.cn.DNS2.PKU.edu.cn.sun1000e.PKU.edu.cn.DNS3.PKU.edu.cn.

Performance

74

Core Web Vitals

Weight

First Contentful Paint
3.8 s10%
Speed Index
5.0 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
5.7 MB
41 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
CERNET

Technology Stack

3 Technologies Detected

Frameworks

1
Vue.js

CSS Frameworks

1
Tailwind CSS

Web Servers

1
Nginxv1.30.1

SEO Analysis

F34/100
8
11
3
Meta Tags4/15
Content5/12
Headings0/8
Technical8/21
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile3/4
Indexability3/3
C
carsi.edu.cncarsi.edu.cn

教育网联邦认证与资源共享基础设施CARSI

No description available for this page.

Title Length21 chars

Recommended: 50-60 chars (~128px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

  • • Missing meta description — important for click-through rates in SERPs
  • • Missing H1 tag — every page should have exactly one H1
  • • Most images missing alt text (21/21) — critical for accessibility and SEO

14 issues found

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Local SEO

Local Search Readiness

3/100
Poor
1 14 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

F22/100
Bot Access
20/25
Machine Read.
1/25
Schema Data
0/25
Citation
1/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
Text ratio:4%
Words:124
Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headings
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (12)
AI readiness recommendation preview...
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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
C
61/100
7
Passed
6
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
3/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
7/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
1/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
3 recommendations
  • •Accessibility recommendation preview...
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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
15/100
F
728 mg
CO₂e / view
5.7 MB
Page Weight
5%
Cleaner Than
New Visitor
832 mg
vs
Returning (cached)
416 mg
Annual (10K/mo)
87.3 kg
Emission Segments
Data Center
163 mg
Network
175 mg
Device
391 mg
Resource Breakdown
JavaScript
2.9 MB
Images
2.0 MB
CSS
877.1 KB
HTML
9.0 KB
Other
2.7 KB
Green Hosting Not Verified
CERNET
8 recommendations
  • •Carbon footprint recommendation preview...
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B

Security Score

71%Good
Static / Informational

HTTPS

No WAF

185d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

TrustAsia Technologies, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

19.11.2025

Valid Until

03.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.carsi.edu.cncarsi.edu.cn

SHA-256 Fingerprint

CF:74:3D:FB:EC:0B:93:01:5E:F5:F2:79:78:C8:74:C4:77:CA:5E:31...

Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

connection
keep-alive
content-encoding
📦 Gzip(gzip)
content-type
text/html
date
Mon, 01 Jun 2026 12:59:25 GMT
server
nginx/1.30.1
transfer-encoding
chunked
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

70

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mx-pku-edu-cn.icoremail.net
gateway.pku.edu.cn

Domain Information

carsi.edu.cn

DNSSEC
Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
D
57/100
Mobile Friendly5 breakpoints
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Microsoft Yahei

WCAG Partial
51/100
Readability
/30
18/30

18px · LH 1.67

Hierarchy
/20
8/20
WCAG
/25
10/25

2.67:1 min contrast

Performance
/25
15/25

1 font · 2 req

Heading Font

Microsoft Yahei

Body Font

Microsoft Yahei

Sans18px

Contrast Ratio

2.67:1

9 issues

Reading Comfort

Single Family

center aligned
18px
p

✅ Excellent readability: 18px body text is ideal for all devices.

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 9 elements below WCAG AA threshold (min 2.7:1).

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

✅ Lean font stack: 1 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFontsFlesch 0

Color Palette

8 unique colors
Light
#ffffff
Background· 32.6%
#234173
Primary· 25.700000000000003%
#c4e6fd
Accent· 17.7%
#95acb6
Secondary· 6.9%
#ddecf9
Accent· 5.6%
#637a98
Secondary· 4.1%
#a6d2f0
Accent· 3.9%
#cad9e4
Secondary· 3.7%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

8 Resources

5
Scripts
3
Styles
0
Async
0
Defer

Top Script Sources

js(4).(1)

Website Identity

carsi.edu.cn

Location detected: 🇨🇳 Chinavia tld

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Last analyzed: 01 Jun 2026 at 13:00

Historical Analysis & Change Tracking