lanbook.com

https://lanbook.com· First analyzed 01 May 2026· Updated 01 May 2026

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lanbook.com

Mobile

Sponsored

Hosting Provider

Timeweb, LLP

IP Address

82.97.245.200

Site Location

🇷🇺 Russiavia phone

Server Location

🇷🇺 St Petersburg, Russia

ASN

AS9123

Organization

Timeweb, LLP

Server

ddos-guard

Nameservers

d.ns.selectel.ru.c.ns.selectel.ru.b.ns.selectel.ru.a.ns.selectel.ru.

Performance

Core Web Vitals

Weight

First Contentful Paint

808 ms10%

Speed Index

1.1 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1004 KB

45 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Timeweb, LLP

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

4 Technologies Detected

CSS Frameworks

Analytics

Tag Managers

Customer Support

SEO Analysis

C64/100

Meta Tags14/15

Content10/12

Headings0/8

Technical16/25

E-E-A-T3/7

Images4/7

Links5/5

URL5/5

Social0/5

Freshness2/4

Mobile2/4

Indexability3/3

lanbook.comlanbook.com

Издательство Лань - выпуск учебной литературы для вузов

Официальный сайт издательства Лань. Интернет-магазин, аннотированный каталог учебной литературы, каталог авторов, фрагменты текстов, Адреса торговых представ...

Description truncated.

Title Length55 chars

Recommended: 50-60 chars (~341px / 580px)

Description Length190 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

3 URLs

3 sub-sitemaps

robots.txt

51 rules

Sitemap reference found

Local SEO

Local Search Readiness

15/100

Poor

5 10 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.

10/25

Schema Data

0/25

Citation

8/25

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

navheader/footer

Text ratio:6%

Words:403

Token eff.:Optimal

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary19w

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 (9)

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.

68/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

12/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

10/15

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

11/15

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

ARIA & Roles

0/15

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

4 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.

54/100

124 mg

CO₂e / view

1003.9 KB

Page Weight

70%

Cleaner Than

New Visitor

142 mg

Returning (cached)

71 mg

Annual (10K/mo)

14.9 kg

Emission Segments

Data Center

28 mg

Network

30 mg

Device

67 mg

Resource Breakdown

JavaScript

368.6 KB

Images

489.4 KB

CSS

131.5 KB

HTML

11.9 KB

Other

2.5 KB

Green Hosting Not Verified

Timeweb, LLP

5 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

41%Poor

Interactive

HTTPS

No WAF

88d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

30.04.2026

Valid Until

29.07.2026

Subject Alternative Names (1)

lanbook.com

SHA-256 Fingerprint

AD:C4:A6:09:9F:09:E5:CC:F1:87:3D:21:57:D6:E3:CF:3B:BC:69:58...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Fri, 01 May 2026 21:27:00 GMT

expires

Fri, 07 Jun 1974 04:00:00 GMT

last-modified

Thu, 30 Apr 2026 09:32:34 GMT

server

ddos-guard

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mx1.spaceweb.ru

mx2.spaceweb.ru

Domain Information

lanbook.com

Domain Age

20y 4m

Created

22.12.2005

Expires

22.12.2028

Last Updated

13.01.2025

Registrar

Regional Network Information Center, JSC dba RU-CENTER

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

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.

59/100

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, maximum-scale=1, user-scalable=no

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

opensans

WCAG Partial

59/100

Readability

/30

20/30

16px · LH 1.69

Hierarchy

/20

9/20

WCAG

/25

17/25

2.72:1 min contrast

Performance

/25

13/25

1 font · 4 req

Heading Font

opensans

Body Font

opensans

Sans16px

Contrast Ratio

2.72:1

13 issues

Reading Comfort

~39 CPL

Narrow lines

16px

✅ Excellent readability: 16px body text is ideal for all devices.

⚠️ Partial contrast: 13 elements below WCAG AA threshold (min 2.7:1).

✅ 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

8 unique colors

Light

#ffffff

Primary· 37.6%

#baaba5

Secondary· 7.4%

#716d84

Secondary· 6.4%

#38416b

Secondary· 5.5%

#89a1a7

Secondary· 3.8%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(16)mc.yandex.ru(1)google-analytics.com(1)googletagmanager.com(1)

Website Identity

lanbook.com

lan@lanbook.ru

+78123369092

20 years old

Location detected: 🇷🇺 Russiavia phone

Regional Network Information Center, JSC dba RU-CENTERru

Sponsored

Last analyzed: 01 May 2026 at 21:27

Historical Analysis & Change Tracking