lanqiao.cn

https://lanqiao.cn· First analyzed 14 May 2026· Updated 14 May 2026

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lanqiao.cn

Mobile

Sponsored

Hosting Provider

Alibaba Cloud

alibabacloud.com

IP Address

120.26.143.170

Site Location

🇨🇳 Chinavia tld

Server Location

🇨🇳 Hangzhou, China

ASN

AS37963

Organization

Alibaba.com LLC

Nameservers

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

Performance

Core Web Vitals

Weight

First Contentful Paint

2.1 s10%

Speed Index

2.8 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

4.7 MB

250 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Alibaba Cloud

Technology Stack

6 Technologies Detected

Frameworks

Meta Frameworks

Other

CSS Frameworks

Icon Libraries

Analytics

SEO Analysis

D41/100

Meta Tags7/15

Content2/12

Headings1/8

Technical13/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

lanqiao.cnlanqiao.cn

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蓝桥云课是国内领先的IT在线编程及在线实训学习平台，专业导师提供精选的实践项目，创新的技术使得学习者无需配置繁琐的本地环境，随时在线流畅使用。以就业为导向，提供编程、运维、测试、云计算、大数据、数据库等全面的IT技术动手实践环境，提供Linux、Python、Java、C语言、...

Description truncated.

Title Length14 chars

Recommended: 50-60 chars (~86px / 580px)

Description Length235 chars

Recommended: 120-160 chars

Issues (3)

• Very thin content (3 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (131/162) — critical for accessibility and SEO

11 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

10 URLs

10 sub-sitemaps

robots.txt

Local SEO

Local Search Readiness

6/100

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

F29/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

0/25

Citation

2/25

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:1%

Words:748

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.

64/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

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.

2 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

596 mg

CO₂e / view

4.7 MB

Page Weight

15%

Cleaner Than

New Visitor

681 mg

Returning (cached)

341 mg

Annual (10K/mo)

71.5 kg

Emission Segments

Data Center

133 mg

Network

143 mg

Device

320 mg

Resource Breakdown

JavaScript

2.8 MB

Images

1.1 MB

CSS

521.4 KB

HTML

320.5 KB

Other

4.1 KB

Green Hosting Not Verified

Alibaba Cloud

8 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

36%Critical

Interactive

HTTPS

No WAF

270d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Beijing Xinchacha Credit Management Co., Ltd.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

09.02.2026

Valid Until

09.02.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.lanqiao.cnlanqiao.cn

SHA-256 Fingerprint

E3:27:43:1B:39:72:A5:78:79:7D:66:CD:58:D8:1C:D5:A8:F0:15:EA...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

none

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Thu, 14 May 2026 22:31:36 GMT

etag

"9a1ff-4HPbgontjSfCbdPTTb0oAlLKr5M"

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

qiye163mx01.mxmail.netease.com

qiye163mx02.mxmail.netease.com

Domain Information

lanqiao.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.

62/100

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, shrink-to-fit=no, viewport-fit=cover

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

-apple-system

WCAG Partial

62/100

Readability

/30

20/30

14px · LH 1.50

Hierarchy

/20

8/20

WCAG

/25

14/25

1:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

-apple-system

Sans

Body Font

-apple-system

Sans14px

Contrast Ratio

1:1

10 issues

Reading Comfort

~33 CPL

Narrow lines

16px

14px

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 10 elements below WCAG AA threshold (min 1.0:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ System fonts: Zero font loading delay — best possible LCP impact.

Flesch 58

Color Palette

7 unique colors

Dark

#313332

Text· 55.9%

#1b2229

Primary· 16.099999999999998%

#93dceb

Accent· 8.8%

#568bc5

Secondary· 7.2%

#2b1c17

Secondary· 6.8%

#170d0c

Secondary· 3.7%

#1f3772

Accent· 1.5%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

assets.lanqiao.cn(9)g.alicdn.com(4)at.alicdn.com(4)cf.aliyun.com(1)hmcdn.baidu.com(1)

Website Identity

lanqiao.cn

Location detected: 🇨🇳 Chinavia tld

zh-Hans

Sponsored

Last analyzed: 14 May 2026 at 22:32

Historical Analysis & Change Tracking