Audit Result

UUID: 019ff6e0-ed31-7151-89f4-fcb57cba6492

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carbonbased.com.cn

https://carbonbased.com.cn/

Scanned 3 weeks ago

91
Excellent Score
39 total checks
Passed
32
Warnings
7
Errors
0

Meta Information

  • Title Tag Pass

    Found 59 characters. Length is optimal.

  • Meta Description Pass

    Found 111 characters. Good snippet length.

  • Canonical URL Pass

    Canonical found: https://www.carbonbased.com.cn/

  • Favicon Pass

    Favicon found and reachable: /favicon.ico (HTTP 204).

    Favicon
  • Viewport Meta Pass

    Viewport configured: width=device-width, initial-scale=1.0

  • HTML Lang Pass

    Language declared as "zh".

Content Structure

Technical Optimization

  • HTTPS Pass

    Page is served over HTTPS.

  • HSTS & HTTPS Redirect Warning

    2 HTTPS hardening issues detected.

    • • Missing Strict-Transport-Security header.
    • • Could not probe the HTTP version of this page.

    Fix: Set Strict-Transport-Security with a long max-age, add includeSubDomains, and redirect all HTTP requests to HTTPS.

  • Security Headers Warning

    Missing: strict-transport-security, content-security-policy, x-frame-options, x-content-type-options, referrer-policy.

    Full HTTP headers (11)
    • • alt-svc: h3=":443"; ma=86400
    • • cf-cache-status: DYNAMIC
    • • cf-ray: a2a0f8f4bfc09bd3-IAD
    • • content-encoding: zstd
    • • content-type: text/html; charset=UTF-8
    • • date: Wed, 12 Aug 2026 16:49:17 GMT
    • • nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
    • • report-to: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=bBFWsnTbTaaowf1%2BK7HjwSDgXAb6DXRfSlb94fnw6i0VgfAQucAQXqF%2FjTVd5n6L1spUGJXyjad6%2FzNLuDKyDVHvlRdl4uYZ296uTzTnJA%2BFajNsik%2BWaycuMqjJWhAepTfrPcMMZtjp1XiVLcX4r44%3D"}]}
    • • server: cloudflare
    • • server-timing: cfCacheStatus;desc="DYNAMIC" cfEdge;dur=11,cfOrigin;dur=268
    • • vary: accept-encoding

    Fix: Add the missing security headers at your reverse proxy or application layer.

  • CSP Quality Warning

    Content-Security-Policy header is missing.

    • • Missing Content-Security-Policy header.

    Fix: Define a restrictive Content-Security-Policy and avoid unsafe directives such as unsafe-inline and unsafe-eval.

  • Cookie Security Pass

    No first-party cookies were set during the initial page load.

  • Server Version Disclosure Pass

    Server response headers do not expose version tokens.

  • Cloudflare Proxy Pass

    Domain appears to be behind Cloudflare.

    • • server: cloudflare
    • • cf-cache-status: DYNAMIC
    • • cf-ray: a2a0f8f4bfc09bd3-IAD
  • Perceived Load Time Pass

    Loaded in 0.54s (perceived).

  • Render Blocking Resources Warning

    0 scripts and 1 styles may block rendering.

    • • style: https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800;900&display=swap

    Fix: Defer non-critical scripts and inline critical CSS to improve first paint speed.

  • Compression Pass

    Text-like assets appear compressed.

  • Robots.txt Pass

    Found robots.txt (200).

  • Sitemap File Pass

    Found sitemap (200) at https://www.carbonbased.com.cn/sitemap.php.

  • Crawl Directives Pass

    Robots meta found: index,follow

Accessibility Basics

  • Form Labels Pass

    All 5 controls are labeled.

  • Landmarks Pass

    Header, nav, main, and footer landmarks are present.

  • Tap Target Size Warning

    11 interactive elements appear smaller than 48px.

    • • button.tab-btn (积木1) - 61x34px
    • • button.tab-btn (积木2) - 61x34px
    • • button.tab-btn (积木3) - 61x34px
    • • button.tab-btn (积木4) - 61x34px
    • • button.tab-btn.active (积木5) - 61x34px
    • • button.tab-add (+) - 34x34px
    • • button.tab-remove (-) - 34x34px
    • • a.contact-link ([email protected]) - 550x20px
    • • a.contact-link (@feifeiwong6133) - 550x20px
    • • a.contact-link (@feifeiwongmax3) - 550x20px
    • • a.contact-link (+86 13068622297) - 550x20px

    Fix: Increase target size to at least 48x48 CSS pixels for touch interactions.

Social & Rich Results

  • Open Graph Basics Pass

    Core Open Graph tags are present.

  • Open Graph Image Pass

    og:image is present and absolute.

    Open Graph Image
  • Twitter Card Pass

    twitter:card set to summary_large_image.

  • Structured Data Pass

    JSON-LD schema detected.

  • PWA Metadata Pass

    Manifest and Apple touch icon are configured.

  • Open Graph/Twitter Quality Warning

    2 social preview quality issues detected.

    • • ISSUE: og:url points to a different origin than the scanned page.
    • • ISSUE: Failed to fetch preview image: network error.
    • • GUIDELINE: Optimal og:title length: 40-60 characters (acceptable: 10-70).
    • • GUIDELINE: Optimal og:description length: 110-160 characters (acceptable: 50-200).
    • • GUIDELINE: Optimal preview image size: 1200x630 pixels.
    • • GUIDELINE: Optimal preview image aspect ratio: 1.91:1.
    • • GUIDELINE: Optimal preview image file size: under 5 MB.
    • • GUIDELINE: Recommended twitter:card: summary_large_image.

    Fix: Use absolute OG/Twitter URLs, keep metadata lengths in recommended ranges, and provide a preview image near 1200x630 under 5MB.

Links Analysis

  • Internal Links Pass

    Checked 8 links. No broken internal links found.

  • External Links Warning

    1 external links returned errors or timed out.

    • • https://beian.miit.gov.cn/ (HTTP 521)

    Fix: Replace dead external URLs or point to working alternatives.

  • Link Format Pass

    All 29 links use non-empty href values.

Performance & Runtime