@charset "UTF-8";

@import url("https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;700&family=Noto+Serif+TC:wght@400;700&family=PT+Serif:ital,wght@0,400;0,700;1,400;1,700&display=swap");

:root {
    --dark: #1d1d1f;
    --light: #f5f5f7;
}

* {
    padding: 0;
    margin: 0;
    border: 0;
}

body {
    font-family: "PT Serif", "Georgia", "Noto Serif TC", "Noto Serif SC", Serif;
    color: var(--dark);
    background-color: var(--light);
    font-size: 20px;
    letter-spacing: -0.005em;
    max-width: 640px;
    padding-left: 10%;
    padding-right: 10%;
    margin-left: auto;
    margin-right: auto;
    height: 100vh;
}

.header {
    width: 36px;
    height: 6px;
    position: absolute;
    top: 0;
    background: linear-gradient(to right,
            #e23838 0px, #e23838 6px,
            #f78200 6px, #f78200 12px,
            #ffb900 12px, #ffb900 18px,
            #5ebd3e 18px, #5ebd3e 24px,
            #009cdf 24px, #009cdf 30px,
            #973999 30px, #973999 36px);
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    transform-origin: top;
}

.rainbow-link {
    display: block;
    width: 100%;
    height: 100%;
    text-decoration: none;
    color: transparent;
}

.header:hover {
    height: 48px;
    background: linear-gradient(to right,
            #e23838 0px, #e23838 6px,
            #f78200 6px, #f78200 12px,
            #ffb900 12px, #ffb900 18px,
            #5ebd3e 18px, #5ebd3e 24px,
            #009cdf 24px, #009cdf 30px,
            #973999 30px, #973999 36px);
}

.main {
    padding-top: 20%;
}

.footer {
    font-size: 0.64em;
    line-height: 1.47;
}

.note {
    font-style: italic;
}

ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    clear: both;
    /*清除左右浮动，ul 自带左浮动*/
}

li {
    float: left;
}

li a {
    margin-right: 1em;
}

a {
    text-decoration: none;
    position: relative;
    color: inherit;
}

.hover-sync {
    pointer-events: none;
}

.hover-sync a {
    pointer-events: auto;
}

.hover-sync:hover a::before {
    transform-origin: 0% 50%;
    transform: scale3d(1, 1, 1);
}

a::before {
    content: "";
    transform-origin: 100% 50%;
    transform: scale3d(0, 1, 1);
    transition: transform 0.3s;
    position: absolute;
    width: 100%;
    height: 1.5px;
    /*background: currentColor;*/
    background: linear-gradient(90deg,
            #e23838 0%,
            #f78200 20%,
            #ffb900 40%,
            #5ebd3e 60%,
            #009cdf 80%,
            #973999 100%);
    top: 100%;
    left: 0;
}

a:hover::before {
    transform-origin: 0% 50%;
    transform: scale3d(1, 1, 1);
}

@media (prefers-color-scheme: dark) {
    body {
        color: var(--light);
        background-color: var(--dark);
    }
}

@media screen and (max-width: 640px) {
    body {
        font-size: 15px;
    }
}