kepuchina.cn

https://kepuchina.cn· First analyzed 30 Apr 2026· Updated 30 Apr 2026

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kepuchina.cn

Mobile

Sponsored

Hosting Provider

Alibaba Cloud

alibabacloud.com

IP Address

39.105.106.59

Site Location

🇨🇳 Chinavia tld

Server Location

🇨🇳 Beijing, China

ASN

AS37963

Organization

Aliyun Computing Co., LTD

Server

Nginx

Nameservers

vip4.alidns.com.vip3.alidns.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

6.6 s10%

Speed Index

8.6 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

810 KB

116 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

Alibaba Cloud

Technology Stack

6 Technologies Detected

CSS Frameworks

Libraries

UI Components

Icon Libraries

Web Servers

SEO Analysis

D53/100

Meta Tags10/15

Content10/12

Headings0/8

Technical15/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

kepuchina.cnkepuchina.cn

科普中国网_让科技知识在网上和生活中流行，中国科学技术出版社有限公司

科普中国网是中国科协主办的权威科普平台，汇聚前沿科技资讯与热门专题，通过图文、视频等多样化形式，深度解读科学热点，致力于提升公众科学素养，推动全民科学普及。

Title Length34 chars

Recommended: 50-60 chars (~210px / 580px)

Description Length78 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (92/109) — critical for accessibility and SEO

10 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

88 URLs

88 sub-sitemaps

robots.txt

6 rules

Sitemap reference found

Local SEO

Local Search Readiness

8/100

Poor

2 13 2

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

Sponsored

AI & LLM Readiness

F38/100

Bot Access

20/25

Machine Read.

12/25

Schema Data

0/25

Citation

6/25

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.txtinvalid

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:2%

Words:342

Token eff.:Optimal

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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Sponsored

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.

52/100

Passed

Critical

Warnings

Images & Alt Text

10/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

6/20

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

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

7/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

5 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.

35/100

100 mg

CO₂e / view

810.2 KB

Page Weight

80%

Cleaner Than

New Visitor

115 mg

Returning (cached)

57 mg

Annual (10K/mo)

12.0 kg

Emission Segments

Data Center

22 mg

Network

24 mg

Device

54 mg

Resource Breakdown

JavaScript

233.2 KB

Images

510.9 KB

CSS

42.4 KB

HTML

23.7 KB

Green Hosting Not Verified

Alibaba Cloud

6 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

150d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

13.03.2026

Valid Until

27.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.kepuchina.cnkepuchina.cn

SHA-256 Fingerprint

F7:A9:17:2F:54:59:5F:65:33:3A:BC:5C:D2:D9:BD:64:56:EA:BD:E7...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate)

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Thu, 30 Apr 2026 15:38:42 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

kepuchina.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.

51/100

Mobile Friendly1 breakpoint

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=1.0

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

PingFang SC

WCAG Partial

61/100

Readability

/30

20/30

14px · LH 1.43

Hierarchy

/20

9/20

WCAG

/25

18/25

4.26:1 min contrast

Performance

/25

14/25

1 font

Heading Font

PingFang SC

Body Font

PingFang SC

Sans14px

Contrast Ratio

4.26:1

1 issue

Reading Comfort

Single Family

left aligned

14px

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

✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 4.3:1).

✅ 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 MyFonts

Color Palette

9 unique colors

Dark

#19161a

Secondary· 14%

#f5f8ff

Primary· 26.1%

#09070a

Background· 23.1%

#262d3f

Secondary· 7.2%

#315078

Secondary· 6.4%

#5b6f8d

Secondary· 6.3%

#c9d4df

Secondary· 6.2%

#8ba8c8

Secondary· 5%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

25 Resources

Scripts

Styles

Async

Defer

Top Script Sources

kepustatic.kepuchina.cn(12)zz.bdstatic.com(1)hm.baidu.com(1)nsso.kepuchina.cn(1)sdk.rum.aliyuncs.com(1)

Website Identity

kepuchina.cn

Location detected: 🇨🇳 Chinavia tld

Sponsored

Last analyzed: 30 Apr 2026 at 15:39

Historical Analysis & Change Tracking