<!doctype html>
<html lang="zh" data-hairline="true" class="itcauecng" data-theme="light"><head> <meta name="keywords" content="keywords_temp" />
<title>title_temp</title>
<meta charSet="utf-8"/><title data-rh="true">404 - 知乎</title><meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1"/><meta name="renderer" content="webkit"/><meta name="force-rendering" content="webkit"/><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"/><meta name="description" property="og:description" content="知乎，中文互联网高质量的问答社区和创作者聚集的原创内容平台，于 2011 年 1 月正式上线，以「让人们更好的分享知识、经验和见解，找到自己的解答」为品牌使命。知乎凭借认真、专业、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容，聚集了中文互联网科技、商业、影视、时尚、文化等领域最具创造力的人群，已成为综合性、全品类、在诸多领域具有关键影响力的知识分享社区和创作者聚集的原创内容平台，建立起了以社区驱动的内容变现商业模式。"/><link data-rh="true" rel="apple-touch-icon" href="http://static.zhihu.com/heifetz/assets/apple-touch-icon-152.81060cab.png"/><link data-rh="true" rel="apple-touch-icon" href="http://static.zhihu.com/heifetz/assets/apple-touch-icon-152.81060cab.png" sizes="152x152"/><link data-rh="true" rel="apple-touch-icon" href="http://static.zhihu.com/heifetz/assets/apple-touch-icon-120.d5793cac.png" sizes="120x120"/><link data-rh="true" rel="apple-touch-icon" href="http://static.zhihu.com/heifetz/assets/apple-touch-icon-76.7abf3393.png" sizes="76x76"/><link data-rh="true" rel="apple-touch-icon" href="http://static.zhihu.com/heifetz/assets/apple-touch-icon-60.362a8eac.png" sizes="60x60"/><link crossorigin="" rel="shortcut icon" type="image/x-icon" href="http://static.zhihu.com/heifetz/favicon.ico"/><link crossorigin="" rel="search" type="application/opensearchdescription+xml" href="http://static.zhihu.com/heifetz/search.xml" title="知乎"/><link rel="dns-prefetch" href="//static.zhimg.com"/><link rel="dns-prefetch" href="//pica.zhimg.com"/><link rel="dns-prefetch" href="//picx.zhimg.com"/><link rel="dns-prefetch" href="//pic1.zhimg.com"/><link rel="dns-prefetch" href="//pic2.zhimg.com"/><link rel="dns-prefetch" href="//pic3.zhimg.com"/><link rel="dns-prefetch" href="//pic4.zhimg.com"/><link rel="dns-prefetch" href="//static.zhihu.com"/><style data-emotion-css="1g1gxq6">:root{--zhc-padding-horizontal:20px;--zhc-padding-vertical:16px;--zhc-notification-top:75px;--app-padding:16px;--app-header-height:52px;--app-max-width:640px;--app-width:1000px;--app-font-size:15px;-app-width-tshape:1080px;}</style><link href="http://static.zhihu.com/heifetz/8425.216a26f4.2f818e02c5d7a51c1cbd.css" crossorigin="" rel="stylesheet"/><link href="http://static.zhihu.com/heifetz/errorpage.216a26f4.9f537267bd47063dabf2.css" crossorigin="" rel="stylesheet"/></head><body class=""><div id="root"><div class="App"><div class="WechatShareImage"><img src="http://static.zhihu.com/heifetz/assets/wechat-share-logo.39ea9ecd.png" alt="ZhiHu logo"/></div><style data-emotion-css="55n9hh">.css-55n9hh{position:fixed;top:0;right:0;left:0;z-index:101;display:none;height:2px;pointer-events:none;background:#1772F6;-webkit-transform:translateX(-100%);-ms-transform:translateX(-100%);transform:translateX(-100%);}</style><div class="LoadingBar  css-55n9hh"></div><style data-emotion-css="1posb5p">:root{--app-header-height:62px;}</style><style data-emotion-css="s8xum0">.css-s8xum0{position:fixed;z-index:100;width:100%;top:0;}</style><div class="css-s8xum0"><style data-emotion-css="iilrph">.css-iilrph{box-sizing:border-box;margin:0;min-width:0;position:relative;min-width:1175px;overflow:hidden;background-clip:content-box;box-shadow:0 1px 3px rgba(0,0,0,0.1);-webkit-transition-property:background-color,box-shadow;transition-property:background-color,box-shadow;-webkit-transition-duration:0.25s;transition-duration:0.25s;-webkit-transition-timing-function:ease-in-out;transition-timing-function:ease-in-out;--logo-width:64px;--profile-width:34px;background-color:#ffffff;}</style><header role="banner" class="AppHeader css-iilrph"> <meta name="keywords" content="keywords_temp" />
<title>title_temp</title>
<style data-emotion-css="lgijre">.css-lgijre{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:justify;-webkit-justify-content:space-between;-ms-flex-pack:justify;justify-content:space-between;gap:16px;padding:0 20px;margin:0 auto;height:62px;max-width:1338px;}</style><div class="css-lgijre"><style data-emotion-css="51utkw">.css-51utkw{width:100%;height:100%;position:relative;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;gap:16px;-webkit-transition:-webkit-transform 0.3s ease-out;-webkit-transition:transform 0.3s ease-out;transition:transform 0.3s ease-out;}</style><div class="css-51utkw"><div class="css-51utkw"><style data-emotion-css="72pd91">.css-72pd91{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;height:100%;}</style><nav class="css-72pd91"><style data-emotion-css="427st7">.css-427st7{box-sizing:border-box;margin:0;min-width:0;color:#09408e;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;height:100%;color:#373a40;font-weight:normal;padding:0 12px;font-size:16px;-webkit-transition:color 0.15s ease-out;transition:color 0.15s ease-out;-webkit-text-decoration:none;text-decoration:none;}.css-427st7:focus{outline:none;-webkit-transition:box-shadow 0.3s;transition:box-shadow 0.3s;}.css-427st7:focus-visible{box-shadow:0 0 0 2px #ffffff,0 0 0 4px rgba(23,114,246,0.3);}.css-427st7:not(.is-active):hover{font-weight:600;color:#191B1F;}</style><style data-emotion-css="53paqb">.css-53paqb{box-sizing:border-box;margin:0;min-width:0;background-color:#c4c7ce;margin-left:10px;margin-right:10px;width:1px;height:15px;}</style><div class="css-53paqb"></div><style data-emotion-css="1caetj6">.css-1caetj6{box-sizing:border-box;margin:0;min-width:0;color:#09408e;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;height:100%;color:#373a40;font-weight:normal;padding:0 12px;font-size:16px;-webkit-transition:color 0.15s ease-out;transition:color 0.15s ease-out;-webkit-text-decoration:none;text-decoration:none;}.css-1caetj6:focus{outline:none;-webkit-transition:box-shadow 0.3s;transition:box-shadow 0.3s;}.css-1caetj6:focus-visible{box-shadow:0 0 0 2px #ffffff,0 0 0 4px rgba(23,114,246,0.3);}.css-1caetj6:not(.is-active):hover{font-weight:normal;color:#191B1F;text-shadow:0 0 0.5px currentColor;}.css-1caetj6:not(.is-active):hover .app-header-badge{text-shadow:none;}</style></nav><style data-emotion-css="11bp94m">.css-11bp94m{-webkit-flex:1;-ms-flex:1;flex:1;-webkit-box-pack:end;-webkit-justify-content:flex-end;-ms-flex-pack:end;justify-content:flex-end;}</style><style data-emotion-css="x84wzl">.css-x84wzl{box-sizing:border-box;margin:0;min-width:0;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex:1;-ms-flex:1;flex:1;-webkit-box-pack:end;-webkit-justify-content:flex-end;-ms-flex-pack:end;justify-content:flex-end;}</style><div class="css-x84wzl"><style data-emotion-css="v0eidh">.css-v0eidh{height:38px;}.css-v0eidh .SearchBar-input{margin-left:auto;max-width:365px;border-radius:9999px;height:100%;border:1px solid var(--MapUIFrame08B);}.css-v0eidh .SearchBar-input:focus-within{border:1px solid var(--MapText05A);}.css-v0eidh .SearchBar-askButton{margin-left:16px;height:100%;}.css-v0eidh .SearchBar-askDropdownButton{width:34px;height:34px;}.css-v0eidh .SearchBar-searchButton{height:38px;border-bottom-right-radius:9999px;border-top-right-radius:9999px;position:relative;right:-1px;}</style><div class="SearchBar css-v0eidh" role="search" data-za-module="PresetWordItem"><form class="SearchBar-tool"><style data-emotion-css="e4pgg3">.css-e4pgg3{--inputPadding:16px;}</style><div><div class="Popover"><style data-emotion-css="1telfwe">.css-1telfwe{--inputPadding:16px;border-color:undefined !important;-webkit-transition-property:background-color,border,color;transition-property:background-color,border,color;-webkit-transition-duration:0.25s;transition-duration:0.25s;-webkit-transition-timing-function:ease-in;transition-timing-function:ease-in;}.css-1telfwe{--inputPadding:16px;border-color:undefined !important;-webkit-transition-property:background-color,border,color;transition-property:background-color,border,color;-webkit-transition-duration:0.25s;transition-duration:0.25s;-webkit-transition-timing-function:ease-in;transition-timing-function:ease-in;}.css-1telfwe{--inputPadding:16px;border-color:undefined !important;-webkit-transition-property:background-color,border,color;transition-property:background-color,border,color;-webkit-transition-duration:0.25s;transition-duration:0.25s;-webkit-transition-timing-function:ease-in;transition-timing-function:ease-in;}.css-1telfwe{--inputPadding:16px;border-color:undefined !important;-webkit-transition-property:background-color,border,color;transition-property:background-color,border,color;-webkit-transition-duration:0.25s;transition-duration:0.25s;-webkit-transition-timing-function:ease-in;transition-timing-function:ease-in;}</style><label class="SearchBar-input css-1telfwe Input-wrapper QZcfWkCJoarhIYxlM_sG"><input type="text" maxLength="100" value="" autoComplete="off" role="combobox" aria-expanded="false" aria-autocomplete="list" aria-activedescendant="null--1" id="null-toggle" aria-haspopup="true" class="Input i7cW1UcwT6ThdhTakqFm" placeholder=""/><button aria-label="搜索" type="button" class="Button SearchBar-searchButton FEfUrdfMIKpQDJDqkjte Button--primary epMJl0lFQuYbC7jrwr_o"><style data-emotion-css="1kuhax6">.css-1kuhax6{color:var(--MapBrand);opacity:1;-webkit-transition-property:color;transition-property:color;-webkit-transition-duration:0.25s;transition-duration:0.25s;-webkit-transition-timing-function:ease-in;transition-timing-function:ease-in;}.css-1kuhax6:hover{opacity:1;}</style><span style="display:inline-flex;align-items:center">​<svg width="20" height="20" viewBox="0 0 16 16" class="ZDI ZDI--SearchFill16 SearchBar-searchIcon css-1kuhax6" fill="currentColor"><path fill-rule="evenodd" d="M10.218 11.632a5.5 5.5 0 1 1 1.414-1.414l2.075 2.075a1 1 0 0 1-1.414 1.414l-2.075-2.075ZM10.6 7.1a3.5 3.5 0 1 1-7 0 3.5 3.5 0 0 1 7 0Z" clip-rule="evenodd"></path></svg></span></button></label></div></div></form><style data-emotion-css="hnfpd2">.css-hnfpd2{gap:2px;white-space:nowrap;border-radius:9999px;-webkit-transition:background .15s ease-out;transition:background .15s ease-out;background:linear-gradient(270deg,rgba(43,64,253,0.16) 0%,rgba(150,106,255,0.16) 100%);}.css-hnfpd2:hover{-webkit-filter:brightness(0.85);filter:brightness(0.85);}.css-hnfpd2:focus{outline:none;-webkit-transition:box-shadow 0.3s;transition:box-shadow 0.3s;}.css-hnfpd2:focus-visible{box-shadow:0 0 0 2px #ffffff,0 0 0 4px rgba(23,114,246,0.3);}</style><style data-emotion-css="so42cc">.css-so42cc{box-sizing:border-box;margin:0;min-width:0;color:#09408e;padding-left:13px;padding-right:13px;color:#5a4df8;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-box-pack:center;-webkit-justify-content:center;-ms-flex-pack:center;justify-content:center;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;font-size:14px;font-weight:600;margin-left:15px;margin-right:15px;gap:2px;white-space:nowrap;border-radius:9999px;-webkit-transition:background .15s ease-out;transition:background .15s ease-out;background:linear-gradient(270deg,rgba(43,64,253,0.16) 0%,rgba(150,106,255,0.16) 100%);}.css-so42cc:hover{-webkit-filter:brightness(0.85);filter:brightness(0.85);}.css-so42cc:focus{outline:none;-webkit-transition:box-shadow 0.3s;transition:box-shadow 0.3s;}.css-so42cc:focus-visible{box-shadow:0 0 0 2px #ffffff,0 0 0 4px rgba(23,114,246,0.3);}</style></div><style data-emotion-css="1mmirzw">.css-1mmirzw{box-sizing:border-box;margin:0;min-width:0;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;margin-left:16px;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;}</style><div class="css-1mmirzw"><div class="Popover"><style data-emotion-css="d5yzzu">.css-d5yzzu{box-sizing:border-box;margin:0;min-width:0;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;margin-right:20px;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;}</style><div id="null-toggle" aria-haspopup="true" aria-expanded="false" type="button" class="Button FEfUrdfMIKpQDJDqkjte Button--plain Button--gray fEPKGkUK5jyc4fUuT0QP css-d5yzzu">切换模式</div></div><div><style data-emotion-css="1ay9vb9">.css-1ay9vb9{margin-right:16px;}</style><style data-emotion-css="1rwz7is">.css-1rwz7is{display:inline-block;padding:0 16px;font-size:14px;line-height:32px;color:#ffffff;text-align:center;cursor:pointer;background:none;border:1px solid;border-radius:3px;background-color:#1772F6;border-color:#1772F6;margin-right:16px;}.css-1rwz7is::mozFocusInner{padding:0;border:0;}.css-1rwz7is:focus{outline:none;-webkit-transition:box-shadow 0.3s;transition:box-shadow 0.3s;}.css-1rwz7is:focus-visible{box-shadow:0 0 0 2px #ffffff,0 0 0 4px rgba(23,114,246,0.3);}.css-1rwz7is:disabled{cursor:default;opacity:0.5;}.css-1rwz7is:hover{border-color:#0a6af5;background-color:#0a6af5;}</style><button type="button" class="Button Button--primary Button--blue css-1rwz7is">登录/注册</button><style data-emotion-css="1fv1gmw">.css-1fv1gmw{position:fixed;bottom:50px;right:64px;width:336px;z-index:2;}</style></div></div></div></div><style data-emotion-css="1ndlr1n">.css-1ndlr1n{pointer-events:none;position:absolute;top:0;left:calc(50% - (var(--logo-width) - var(--profile-width)) / 2);-webkit-transform:translateX(-50%);-ms-transform:translateX(-50%);transform:translateX(-50%);width:100%;height:100%;max-width:1032px;}</style><div class="css-1ndlr1n"><div></div></div></div></div></header></div><style data-emotion-css="1g41cri">.css-1g41cri{width:100%;height:62px;}</style><div class="css-1g41cri"></div><div class="ErrorPage"><div class="ErrorPage-container"><div class="ErrorPage-text"><h1 class="ErrorPage-title">404</h1><p class="ErrorPage-subtitle">你似乎来到了没有知识存在的荒原</p></div><div class="ErrorPage-errorImageContainer"><img class="ErrorPage-errorImage" src="http://static.zhihu.com/heifetz/assets/liukanshan_wire.dc5adecf.svg" alt="page error"/></div></div><div class="CornerButtons"><div class="CornerAnimayedFlex"><style data-emotion-css="1ke45a8">.css-1ke45a8{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-webkit-justify-content:center;-ms-flex-pack:center;justify-content:center;background:#ffffff;color:#8491a5;box-shadow:0 1px 3px rgba(0,0,0,0.1);border-radius:4px;width:40px;height:40px;}.css-1ke45a8:hover{background:#DEDFE3;}html[data-theme='dark'] .css-1ke45a8:hover{background:#3D4046;}@supports (background:color-mix(in srgb,red,blue)){.css-1ke45a8:hover{background:color-mix(in srgb,#9196a1 30%,#ffffff);}}</style><style data-emotion-css="1wc9pe6">.css-1wc9pe6{display:inline-block;padding:0;font-size:14px;line-height:inherit;color:#8491a5;text-align:center;cursor:pointer;background:none;border:none;border-radius:0;height:auto;background-color:transparent;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-webkit-justify-content:center;-ms-flex-pack:center;justify-content:center;background:#ffffff;color:#8491a5;box-shadow:0 1px 3px rgba(0,0,0,0.1);border-radius:4px;width:40px;height:40px;}.css-1wc9pe6::mozFocusInner{padding:0;border:0;}.css-1wc9pe6:focus{outline:none;-webkit-transition:box-shadow 0.3s;transition:box-shadow 0.3s;}.css-1wc9pe6:focus-visible{box-shadow:0 0 0 2px #ffffff,0 0 0 4px rgba(23,114,246,0.3);}.css-1wc9pe6:disabled{cursor:default;opacity:0.5;}.css-1wc9pe6:hover{background:#DEDFE3;}html[data-theme='dark'] .css-1wc9pe6:hover{background:#3D4046;}@supports (background:color-mix(in srgb,red,blue)){.css-1wc9pe6:hover{background:color-mix(in srgb,#9196a1 30%,#ffffff);}}</style><button data-tooltip="建议反馈" data-tooltip-position="left" data-tooltip-will-hide-on-click="true" aria-label="建议反馈" type="button" class="Button CornerButton Button--plain css-1wc9pe6"><svg class="Zi Zi--Feedback" aria-label="建议反馈" fill="currentColor" viewBox="0 0 24 24" width="24" height="24"><path d="M19.99 6.99L18 5s-1-1-2-1H8C7 4 6 5 6 5L4 7S3 8 3 9v9s0 2 2.002 2H19c2 0 2-2 2-2V9c0-1-1.01-2.01-1.01-2.01zM16.5 5.5L19 8H5l2.5-2.5h9zm-2 5.5s.5 0 .5.5-.5.5-.5.5h-5s-.5 0-.5-.5.5-.5.5-.5h5z"></path></svg></button></div></div></div></div></div></body></html>