解密：SCP-MC-404

+ Show component code

@supports(display: grid) {
    :root {
        --sidebar-width-on-desktop: calc((var(--base-font-size) * (14 / 15)) * 19);
        --body-width-on-desktop: 45.75rem;
    }
    @media only screen and (min-width: 769px) {
        #side-bar .close-menu {
            display: block;
            position: fixed;
            top: 0.5rem;
            left: 0.5rem;
            width: 3rem;
            height: 3rem;
            opacity: 1;
            pointer-events: all;
            z-index: -1;
        }
 
        #side-bar .close-menu img {
            color: transparent;
        }
 
        #side-bar .close-menu::before,
        #side-bar .close-menu::after {
            content: "";
            box-sizing: border-box;
            position: fixed;
            display: block;
            top: 0.5rem;
            left: 0.5rem;
            width: 3rem;
            height: 3rem;
            padding: 0;
            margin: 0;
            text-align: center;
            pointer-events: all;
            cursor: pointer;
            transition:
                opacity var(--sidebar-transition-timing);
        }
 
        #side-bar .close-menu::before {
            --mask:url("data:image/svg+xml,%3C%3Fxml version='1.0' encoding='utf-8'%3F%3E%3Csvg xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' id='Hamburger' x='0' y='0' baseProfile='tiny' overflow='visible' version='1.2' viewBox='0 0 32 32' xml:space='preserve'%3E%3Cpath d='M4 10h24c1.1 0 2-.9 2-2s-.9-2-2-2H4c-1.1 0-2 .9-2 2s.9 2 2 2zm24 4H4c-1.1 0-2 .9-2 2s.9 2 2 2h24c1.1 0 2-.9 2-2s-.9-2-2-2zm0 8H4c-1.1 0-2 .9-2 2s.9 2 2 2h24c1.1 0 2-.9 2-2s-.9-2-2-2z'/%3E%3C/svg%3E");
            z-index: -1;
            background-color: var(--toggle-icon-color, rgb(var(--sidebar-links-text))) !important;
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            mask-position: 50% 50%;
            -webkit-mask-size: 60%;
            mask-size: 60%;
        }
 
        #side-bar .close-menu::after {
            z-index: -2;
            background-color: var(--toggle-button-bg, rgb(var(--sidebar-bg-color))) !important;
            border-radius: var(--toggle-roundness, 50%);
            border: var(--toggle-border-color, rgb(var(--sidebar-links-text))) var(--toggle-border-width, 0.25rem) solid;
        }
 
        #side-bar:focus-within .close-menu,
        #side-bar:not(:has(.close-menu:hover)):not(:focus-within):hover .close-menu {
            pointer-events: none;
        }
 
        #side-bar:focus-within .close-menu::before,
        #side-bar:focus-within .close-menu::after {
            opacity: 0;
            pointer-events: none;
        }
 
        #side-bar:not(:has(.close-menu:hover)):not(:focus-within):hover .close-menu::before,
        #side-bar:not(:has(.close-menu:hover)):not(:focus-within):hover .close-menu::after {
            opacity: 0;
            pointer-events: none;
        }
 
        #side-bar {
            display: block;
            position: fixed;
            top: 0;
            left: calc(var(--sidebar-width-on-desktop)*-1);
            z-index: 10;
            transition:
                left 500ms cubic-bezier(0.4, 0, 0.2, 1) 100ms;
            height: 100%;
            overflow-y: auto;
            overflow-x: hidden;
            margin-top: 0;
        }
 
        #side-bar:focus-within {
            left: 0;
        }
 
        #side-bar:not(:has(.close-menu:hover)):not(:focus-within):hover {
            left: 0;
        }
 
        #side-bar .side-block {
            margin-top: 1rem;
            background-color: rgb(0, 0, 0, 0);
            border-radius: 0;
            border-left-width: 0px;
            border-right-width: 0px;
        }
 
        #main-content::before {
            content: "";
            display: block;
            position: fixed;
            top: 0;
            right: 0;
            z-index: -1;
            opacity: 0;
            transition:
                opacity 500ms cubic-bezier(0.4, 0, 0.2, 1) 100ms,
                width 500ms cubic-bezier(0.4, 0, 0.2, 1) 100ms;
            margin-left: var(--sidebar-width-on-desktop);
            background: rgba(var(--swatch-menubg-black-color), .3) 1px 1px repeat;
            padding-right: 0;
            width: 100%;
            height: 100vh;
            pointer-events: none;
            z-index: 99;
        }
 
        #side-bar:focus-within ~ #main-content::before {
            width: calc(100% - var(--sidebar-width-on-desktop));
            opacity: 1;
            pointer-events: all;
        }
 
        #side-bar:not(:has(.close-menu:hover)):not(:focus-within):hover ~ #main-content::before {
            width: calc(100% - var(--sidebar-width-on-desktop));
            opacity: 1;
            pointer-events: all;
        }
 
        @supports (-moz-appearance:none) and (background-attachment:local) and (not (-moz-osx-font-smoothing:auto)) { #side-bar {
            padding: inherit;
        } }
 
        #content-wrap {
            display: flex;
            flex-direction: row;
            width: calc(100vw - (100vw - 100%));
            min-height: calc(100vh - calc(var(--final-header-height-on-desktop, 10.125rem)));
            flex-grow: 2;
            height: auto;
            position: relative;
            margin: 0 auto;
            max-width: inherit;
        }
 
        #main-content {
            width: 100%;
            position: initial;
            max-height: 100%;
            padding: 2rem 1rem;
            width: var(--body-width-on-desktop, 45.75rem);
            max-width: var(--body-width-on-desktop, 45.75rem);
            margin: 0 auto;
        }
 
        #page-content {
            max-width: min(90vw, var(--body-width-on-desktop, 45.75rem));
        }
 
        @supports (-webkit-hyphens:none) { 
            #side-bar {
                transition:
                    left 500ms cubic-bezier(0.4, 0, 0.2, 1) 100ms,
                    padding-right 500ms cubic-bezier(0.4, 0, 0.2, 1) 100ms,
                    background-color 500ms cubic-bezier(0.4, 0, 0.2, 1) 100ms;
                padding-right: 0;
                background-color: rgb(0, 0, 0, 0);
                pointer-events: all;
                overflow-x: visible;
                overflow-y: visible;
                z-index: 999;
            }
 
            #side-bar::-webkit-scrollbar {
                opacity: 0;
                -webkit-transition: opacity 500ms cubic-bezier(0.4, 0, 0.2, 1) 100ms;
                transition: opacity 500ms cubic-bezier(0.4, 0, 0.2, 1) 100ms;
            }
 
            #side-bar .close-menu::before {
                z-index: 999;
            }
 
            #side-bar .close-menu::after {
                z-index: 998;
            }
 
            #side-bar:hover .close-menu::before,
            #side-bar:hover .close-menu::after {
                opacity: 0;
            }
 
            #side-bar:hover {
                left: 0;
                background-color: rgba(var(--swatch-menubg-color), 1);
                padding-right: 0;
            }
 
            #side-bar:hover::-webkit-scrollbar {
                opacity: 1;
            }
 
            #side-bar:hover~#main-content::before {
                width: calc(100% - var(--sidebar-width-on-desktop));
                opacity: 1;
                pointer-events: all;
            }
        }
    }
}

---

+ Show component code

@supports(display: grid) {
    :root {
        /* header measurements */
        --header-height-on-desktop: 10rem;
        --header-height-on-mobile: 10rem;
        --header-h1-font-size: clamp(2rem, 5vw, 2.8125rem);
        --header-h2-font-size: clamp(0.875rem, 3vw, 0.9375rem);
    }
 
    #header {
        --search-textbox-text-color: var(--swatch-secondary-color);
        background: none;
    }
 
    #header::before {
        content: " ";
        position: absolute;
        width: 100%;
        height: 100%;
        left: 0;
        top: 0.75rem;
        background-image: var(--logo-image);
        background-repeat: no-repeat;
        background-position: center 0;
        background-size: auto calc(var(--header-height-on-desktop) - 1.5rem);
        opacity: 0.8;
        pointer-events: none;
    }
 
    #header h1,
    #header h2 {
        margin: 0;
        padding: 0;
        width: 100%;
        height: var(--header-height-on-desktop);
        display: flex;
        align-items: center;
        justify-content: center;
        display: flex;
        align-items: center;
        justify-content: center;
    }
 
    #header h1 a,
    #header h1 a::before,
    #header h2 span,
    #header h2 span::before {
        margin: 0;
        padding: 0;
        z-index: 0;
        display: block;
        text-align: center;
    }
 
    #header h1 {
        z-index: 1;
    }
 
    #header h1 a::before,
    #header h1 a::after {
        content: var(--header-title);
    }
 
    #header h1 a::before  {
        color: rgb(var(--swatch-text-tertiary-color));
        z-index: -1;
        -webkit-text-stroke: 0.325rem rgb(var(--swatch-text-dark));
    }
 
    #header h1 a::after {
        color: rgb(var(--swatch-headerh1-color));
        z-index: 1;
    }
 
    #header h2 {
        z-index: 0;
        text-transform: uppercase;
        pointer-events: none;
    }
 
    #header h2 span {
        margin-top: calc(var(--header-height-on-mobile)/2 + var(--header-h1-font-size)/2 - 2em);
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    #header h2 span::before,
    #header h2 span::after {
        --wght: 600;
        content: var(--header-subtitle);
        position: absolute;
        left: 50%;
        transform: translateY(-50%) translateX(-50%);
        width: 100%;
        text-align: center;
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    #header h2 span::before {
        -webkit-text-stroke: 0.25rem rgb(var(--swatch-text-dark));
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    #header h2 span::after {
        color: rgb(var(--swatch-headerh2-color));
        z-index: 1;
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    #search-top-box form[id="search-top-box-form"]:not(:focus-within) input[type="text"] {
        color: rgba(0, 0, 0, 0);
    }
 
    @media (min-width: 36rem) {
 
        #login-status {
            flex-grow: 1;
            left: 3%;
            right: initial;
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         #login-status::before {
            --mask-image: none;
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            -webkit-user-select: initial;
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            -ms-user-select: initial;
            user-select: initial;
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            --clip-path:
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            background-color: rgba(var(--login-arrow-color), 0);
 
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            content: "";
            position: absolute;
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            height: 100%;
            background-color: rgba(var(--login-arrow-color), 1);
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            clip-path: var(--clip-path);
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        #login-status #account-topbutton::before,
        #login-status:not(:focus-within) #account-topbutton::before,
        #login-status:not(:focus-within) #account-topbutton:hover::before {
            --clip-path:
                    polygon( 30% 35%, 70% 35%, 50% 60%, 50% 60% );
            --mask-image: initial;
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            display: none;
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            --clip-path:
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                        0 0,
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                    );
            pointer-events: all;
            -webkit-clip-path: var(--clip-path);
            clip-path: var(--clip-path);
        }
 
        #login-status:not(:focus-within) *:not(#account-topbutton):not(#account-options):not([href*="account/messages"]) {
            opacity: 1;
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        #login-status #my-account {
            --wght: 300;
        }
 
        #account-options {
            background: var(--gradient-header);
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        #search-top-box {
            top: 1.5em;
            right: 3%;
            background: rgba(var(--search-focus-textbox-bg-color), 0.4);
            box-shadow: calc(var(--search-height) / 2 * -1) 0 calc(var(--search-height) / 2) rgba(var(--search-focus-textbox-bg-color), 0.4);
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         #search-top-box:focus-within ~ #login-status {
            opacity: 1;
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        #search-top-box::after {
            transition:
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                -webkit-clip-path 150ms cubic-bezier(0.4, 0, 0.2, 1);
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                background-color 150ms cubic-bezier(0.4, 0, 0.2, 1),
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            transition:
                background-color 150ms cubic-bezier(0.4, 0, 0.2, 1),
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                -webkit-clip-path 150ms cubic-bezier(0.4, 0, 0.2, 1);
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        #search-top-box:not(:focus-within)::after {
            --clip-path:
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}

这一章，其实并没有什么值得讲出来的，其实你看和不看都不重要。这一章我们讲的是：SCP-MC-404的量子力学原理。

乍一听似乎很难想象，一篇如此简单的项目居然能够引出量子力学，这该如何解释。首先，我们了解量子力学原理：量子力学是解决原子内电子运动的理论，提出者为马克思·普朗克，领导者为薛定谔以及卢瑟福。但双方并不是同一个流派，卢瑟福和玻尔主张哥本哈根学派的量子叠加态，而薛定谔和爱因斯坦主张反对叠加态和量子随机性。

但这并不是重点。

我们要先从一个诡异的实验讲起：双缝干涉实验。双缝干涉实验是证明光到底是波还是粒子的实验，就是将一台可以发射光子也可以发射光波的仪器，前面是一堵墙，中间带两条缝隙，后面是黑色的墙。如果是粒子，光就会在黑墙上射出两条白线；而如果光是波，将出现一黑一白一黑一白这样的斑马线¹。

实验开始。

光开始射出，科学家们在旁边紧张的等待着，但黑墙上出现的是斑马线，这令支持波理论的学者欣喜若狂。有人提议，将两条缝隙的墙的前面放上一个探测器，看看光是怎么产生干涉条纹的。但，一旦探测器打开，黑墙上便出现了两条白色的条纹，但一旦关闭探测器，墙上就变出了干涉条纹。

诡异。

这是为什么呢？

这就涉及到了量子力学。当一个粒子没有被观测时，它同时处于多个状态的叠加。但当观测时，你只能得到一个最终的状态。也就是它的波函数在观测时是分散的，但测量后立刻变为在一个位置是100%，其他位置是0。这个粒子的波函数在测量前后发生了瞬间的变化，从一个分散的函数变为了一个集中在一点的的函数，根据哥本哈根诠释，这个由测量导致波函数聚变的过程，名为坍缩。坍缩的过程是完全随机的、不可预测的，它没有从变大变小的中间态，是不连续的，像瞬间完成的。

回到今天的主角——SCP-MC-404。我们知道它不能被观测，所以我们也不知道它不被注视时什么状态，所以只是表现为一个大箱子。但它可能是一把铁剑，一个盔甲架，一张地图。我们永远也不可能知道它究竟是什么。而题目标记为“大箱子”是不正确，因为它只是坍缩时才是表现为一个大箱子。

这就是404悖论，这就是世界的真相。

Footnotes

1. 这是因为波拥有波峰和波谷。