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las.ac.cn

https://las.ac.cn· First analyzed 05 May 2026· Updated 05 May 2026
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las.ac.cn
Desktop screenshot of las.ac.cn
Mobile screenshot of las.ac.cn
Mobile

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Hosting Provider

IP Address

124.16.154.125

Site Location

🇨🇳 Chinavia tld

Server Location

🇨🇳 Chaowai, China

ASN

AS7497

Organization

CSTNET

Server

Nginx

Nameservers

ns4.cstnet.cn.ns3.cstnet.cn.

Performance

79

Core Web Vitals

Weight

First Contentful Paint
2.4 s10%
Speed Index
3.2 s10%
Largest Contentful Paint
25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
3 MB
80 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
CSTNET

Technology Stack

7 Technologies Detected

CSS Frameworks

2

Libraries

1

Other

1

UI Components

1

Icon Libraries

1

Web Servers

1

SEO Analysis

F39/100
10
10
3
Meta Tags4/15
Content9/12
Headings1/8
Technical10/21
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile1/4
Indexability3/3
L
las.ac.cnlas.ac.cn

中国科学院知识服务平台

No description available for this page.

Title Length11 chars

Recommended: 50-60 chars (~68px / 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 (60/62) — critical for accessibility and SEO

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

F28/100
Bot Access
20/25
Machine Read.
3/25
Schema Data
0/25
Citation
5/25

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
def. listsnavheader/footer
Text ratio:2%
Words:271
Token eff.:Too Short
Sections/1K:14.8
Depth:3/5

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headingsavg 1w
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.
D
49/100
9
Passed
6
Critical
2
Warnings
Images & Alt Text
5/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
13/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
5/15
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
4/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
5 recommendations
  • Accessibility recommendation preview...

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.
7/100
F
377 mg
CO₂e / view
3.0 MB
Page Weight
30%
Cleaner Than
New Visitor
431 mg
vs
Returning (cached)
215 mg
Annual (10K/mo)
45.2 kg
Emission Segments
Data Center
84 mg
Network
91 mg
Device
202 mg
Resource Breakdown
JavaScript
299.5 KB
Images
2.1 MB
CSS
471.1 KB
HTML
92.7 KB
Other
4.9 KB
Green Hosting Not Verified
CSTNET
7 recommendations
  • Carbon footprint recommendation preview...
D

Security Score

41%Poor
Interactive

HTTPS

No WAF

155d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

China Financial Certification Authority

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

Valid From

23.03.2026

Valid Until

08.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.las.ac.cnlas.ac.cn

SHA-256 Fingerprint

90:48:14:1D:96:DC:A1:AE:E9:CF:99:AF:6A:BD:62:A7:25:BF:3D:17...

Top Recommendations

Security recommendation preview

HTTP Headers

Developer Console

connection
keep-alive
content-language
zh-CN
content-type
text/html;charset=UTF-8
date
Tue, 05 May 2026 20:25:24 GMT
server
nginx
transfer-encoding
chunked
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

50

SPF
DKIM
DMARC

MX Records (1)

mail.las.ac.cn

Domain Information

las.ac.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.
C
63/100
Mobile Friendly3 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, shrink-to-fit=no
3 recommendations
  • Mobile compatibility recommendation preview...

Typography & Readability

Microsoft Yahei

WCAG Partial
53/100
Readability
/30
18/30

14px · LH 1.71

Hierarchy
/20
8/20
WCAG
/25
14/25

1:1 min contrast

Performance
/25
13/25

1 font · 2 req

Heading Font

Microsoft Yahei

Sans

Body Font

Microsoft Yahei

Sans14px

Contrast Ratio

1:1

7 issues

Reading Comfort

~39 CPL

Narrow lines
18px
h3
14px
h4
14px
p

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

⚠️ Partial contrast: 7 elements below WCAG AA threshold (min 1.0:1).

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

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

Color Palette

10 unique colors
Light
#ffffff
Background· 26.599999999999998%
#bbdff3
Primary· 21.4%
#0c9bd4
Primary· 17.5%
#6db0ca
Secondary· 8.8%
#e3f2f5
Secondary· 6.2%
#339dcd
Accent· 5.1%
#9cc3d9
Secondary· 4.5%
#4671a6
Secondary· 2.9%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1

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

17 Resources

11
Scripts
6
Styles
0
Async
0
Defer

Top Script Sources

local(10)hm.baidu.com(1)

Website Identity

las.ac.cn

Location detected: 🇨🇳 Chinavia tld
en-US

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Last analyzed: 05 May 2026 at 20:52

Historical Analysis & Change Tracking