Hexo-theme-next: Body width too big

[kuretru]

Issue Checklist

• [x] I have executed hexo clean, cleared the browser cache and disabled all CDN services (e.g. Cloudflare Rocket Loader), this issue still exists.
• [x] I have confirmed that this issue only appears in theme NexT, but cannot be reproduced in other themes (e.g. default theme landscape). In other words, prove that this is a NexT issue, not a issue from Hexo.
• [x] I have already viewed NexT Documentation Site and Hexo Docs page, especially Troubleshooting part.
• [x] I have already viewed the latest Roadmap on GitHub and searched for current issues, which does not help me.

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Expected behavior

Actual behavior

Steps to reproduce the behavior

1. hexo init blog && cd blog && yarn install
2. git clone https://github.com/theme-next/hexo-theme-next themes/next
3. Set NexT schema to Pisces or Gemini

Environment Information

Node.js and NPM Information

yarn -v
> 1.19.0

Package dependencies Information

{
  "name": "hexo-site",
  "version": "0.0.0",
  "private": true,
  "hexo": {
    "version": "3.9.0"
  },
  "dependencies": {
    "hexo": "^3.9.0",
    "hexo-generator-archive": "^0.1.5",
    "hexo-generator-category": "^0.1.3",
    "hexo-generator-index": "^0.2.1",
    "hexo-generator-tag": "^0.2.0",
    "hexo-renderer-ejs": "^0.3.1",
    "hexo-renderer-stylus": "^0.3.3",
    "hexo-renderer-marked": "^1.0.1",
    "hexo-server": "^0.3.3"
  }
}

Hexo Version

hexo: 3.9.0
hexo-cli: 2.0.0
os: Darwin 18.7.0 darwin x64
node: 12.10.0
v8: 7.6.303.29-node.16
uv: 1.31.0
zlib: 1.2.11
brotli: 1.0.7
ares: 1.15.0
modules: 72
nghttp2: 1.39.2
napi: 4
llhttp: 1.1.4
http_parser: 2.8.0
openssl: 1.1.1c
cldr: 35.1
icu: 64.2
tz: 2019a
unicode: 12.1

Hexo Configuration

theme: next

NexT Configuration

 # Schemes
 #scheme: Muse
 #scheme: Mist
 #scheme: Pisces
 scheme: Gemini

Other Information

• This problem has occurred since b6939a389fc146b103dab8f00c1018c22f16856a.
• And only occurred in Pisces and Gemini.

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[stevenjoezhang]

Fixed in https://github.com/theme-next/hexo-theme-next/commit/5b6dbe78e059e62327184ab546bfdab86a0a10dc