/*=============== VARIABLES CSS ===============*/
:root {
    --spacing: .25rem;
    --background-white: #fff;
    --background: oklch(.9818 .0054 95.0986);
    --border-color: oklch(.8847 .0069 97.3627);
    --border-radius: .5rem;
    --container: 80rem;
    --text-muted: oklch(.6059 .0075 97.4233);
    --text-content: oklch(.4334 .0177 98.6048);
    --primary: oklch(.6171 .1375 39.0427);
    --theme-color: #374151;

}

/* 暗色主题 */
[data-theme="dark"] {
    --background-white: #1a1a1a;
    --background: #262626;
    --border-color: #404040;
    --text-muted: #a3a3a3;
    --text-content: #e5e5e5;
    --primary: oklch(.6171 .1375 39.0427);
    --theme-color: #e5e7eb;
}

/*=============== BASE ===============*/
html {
    scroll-behavior: smooth;
    scroll-margin-top: 50px;
    font-feature-settings: "tnum"
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "LXGW WenKai", sans-serif;
    scrollbar-width:none
}

body {
    background-color: var(--background-white);
    color: var(--text-content);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3 {
    font-size: 1rem;
}

a {
    color: var(--text-content);
    text-decoration: none;
}
a:hover {
    color: var(--primary) !important;
}

ul {
    list-style: none;
}
ruby {
    ruby-align: center; /* 拼音居中对齐 */
}
rt {
    font-size: calc(var(--spacing) * 3);
    color: var(--text-content);
    font-family: sans-serif;
    letter-spacing: 0.05rem;
}
sup {
    font-size: calc(var(--spacing) * 3);
    color: var(--text-content);
    cursor: pointer;
    transition: color 0.3s;
}
sup:hover {
    color: var(--primary);
}
/* 容器和卡片 */
.container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 calc(var(--spacing) * 4);
    height: calc(var(--spacing) * 16);
}

.card {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: calc(var(--spacing) * 5);
    transition: border-color 0.3s ease;
}

.card-small {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: calc(var(--spacing) * 4);
    margin-bottom: calc(var(--spacing) * 4);
    transition: border-color 0.3s ease;
}

/* 布局 */

.text-center {
    text-align: center;
}

.text-muted {
    color: var(--text-muted);
}

.text-content {
    color: var(--text-content);
}

/* 页头 */
header {
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    background-color: var(--background-white);
    z-index: 9999;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}
.logo{
    height: calc(var(--spacing) * 8);
}
.nav-list {
    display: flex;
    gap: calc(var(--spacing) * 8);
    font-weight: 600;
    align-items: center;
}
.nav-list .nav-item{
    color: var(--text-muted);
}
.nav-list .nav-item.active{
    color: var(--primary);
}

/* 主内容 */
main {
    max-width: var(--container);
    margin: calc(var(--spacing) * 12) auto;
    padding: 0 calc(var(--spacing) * 4);
}
.flex{
    display: flex;
    gap: 1rem;
    justify-content: space-between;
}

.left {
    width: calc(100% - 16rem);
}

.right {
    width: 16rem;
}
.reversal{
    order: -1;
}

.exhibit {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}
.exhibit.auto{
    margin: 0 auto;
}
.caption{
    font-size: 1.5rem;
}
.author{
    padding: .5rem 0 1.5rem;
}
.dynasty:before{
    content: '[';
}
.dynasty:after{
    content: ']';
}
.author a{
    color: var(--text-muted);
    margin: 0 var(--spacing);
}

.content {
    white-space: pre-wrap;
    color: var(--text-content);
    line-height: 2rem;
    letter-spacing: 0.05rem;
}
.content.line{
    margin-top: calc(var(--spacing) * 2) !important;
    line-height: unset;
    font-size: calc(var(--spacing) * 3.5);
}
.indent{
    text-indent: 2rem;
    text-align: left;
}
.auxiliary{
    white-space: pre-wrap;
    color: var(--text-muted);
    font-size: .875rem;
}
.quote {
    position: relative;
    padding-left: 1.25rem;
    line-height: 1.5rem;
    height: 1.5rem;
}
/* 初始化计数器 */
ul {
    counter-reset: item;
}
.quote::before {
    content: counter(item); /* 使用计数器显示数字 */
    counter-increment: item; /* 每次递增计数器 */
    position: absolute;
    left: 0; /* 圆圈位置 */
    top: .2rem;
    width: .825rem;
    height: .825rem;
    border: 1px solid var(--text-muted);
    color: var(--text-muted); /* 数字颜色 */
    border-radius: 50%; /* 圆形 */
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .75rem;
}

.tags {
    display: flex;
    width: 100%;
    margin-top: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.tags a {
    font-size: .875rem;
}

.tags a:before {
    content: '#';
    margin-right: .25rem;
}

.choice {
    display: flex;
    gap: 1rem;
    justify-content: space-between;
    flex-wrap: wrap;
    letter-spacing: 0.05rem;
}
.choice.start{
    justify-content: flex-start
}

.choice a:hover {
    color: unset;
    background-color: var(--background);
}

.choice-card {
    width: calc((100% - 1rem) / 2);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: calc(var(--spacing) * 5);
    box-shadow: 0 1px 3px 0 #0000001a, 0 1px 2px -1px #0000001a;
    transition: border-color 0.3s ease, background-color 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.choice-card p:not(:first-child){
    margin-top: calc(var(--spacing) * 4);
}

.choice-source {
    font-size: .875rem;
    color: var(--text-muted);
    margin-top: calc(var(--spacing) * 2);
}
.choice-three{
    width: calc((100% - 2rem) / 3)
}
.tag-list {
    display: flex;
    gap: .75rem;
    font-size: .825rem;
    flex-wrap: wrap;
    margin-top: calc(var(--spacing) * 4);
}

.title {
    font-weight: 600;
    color: var(--text-content);
    position: relative;
    padding-left: 10px;
    display: flex;
    align-items: center;
}

.title::before {
    content: "";
    border-radius: var(--border-radius);
    width: 4px;
    height: 70%;
    background-color: var(--primary);
    position: absolute;
    left: 0;
}

.subtitle {
    margin: calc(var(--spacing) * 4) 0;
}

.collection{
    margin-bottom: calc(var(--spacing) * 4);
}
.collection h1{
    margin-bottom: calc(var(--spacing) * 2);
}
.collection p{
    text-indent: calc(var(--spacing) * 8);
}

/* 页脚 */
footer {
    border-top: 1px solid var(--border-color);
    transition: border-color 0.3s ease;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: calc(var(--spacing) * 4);
    margin: 0 auto;
    max-width: var(--container);
    padding: calc(var(--spacing) * 10)  calc(var(--spacing) * 5);
}

.col-span-2 {
    grid-column: span 2;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.col-span-2 img{
    margin-bottom: 1rem;
}
.col-span-2 a{
    color: var(--text-muted);
}
.footer-bottom {
    padding:calc(var(--spacing) * 4);
    margin: 0 auto;
    max-width: var(--container);
    display: flex;
    justify-content: space-between;
}
.jump a{
    color: var(--text-muted);
    font-size: .875rem;
}
footer ul li{
    line-height: 2;
}

.underline {
    position: relative;
    display: inline-block;
    cursor: pointer;
}

.underline::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 8px;
    /* 减少波浪数量，增加每个波浪的宽度 */
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 12' preserveAspectRatio='none'%3E%3Cpath d='M0,6 C15,3 25,8.5 33,5.5 C41,2.5 49,8 57,6 C65,4 73,9 82,6.5 C91,4 100,7.5 100,6' stroke='%23374151' fill='none' stroke-width='1.2' vector-effect='non-scaling-stroke'/%3E%3C/svg%3E");
    background-repeat: repeat-x;
    /* 增加background-size使每个重复单元更大 */
    background-size: 65px 100%;
    filter: var(--theme-color);
    opacity: 0.7;
    transform: rotate(-0.4deg);
}

[data-theme="dark"] .underline::after {
    filter: invert(1);
}

.tooltip {
    position: absolute;
    background-color: var(--background-white);
    color: var(--text-content);
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 12px;
    z-index: 10000 !important;
    max-width: 20rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    pointer-events: none;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    word-wrap: break-word;
    line-height: 1.4;
}


/* 暗色主题下的tooltip */
[data-theme="dark"] .tooltip {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

/* 主题切换器样式 */
.theme-switcher {
    position: relative;
    display: inline-block;
}

.theme-toggle {
    border: 1px solid var(--border-color);
    border-radius: calc(var(--border-radius) * 4);
    background: var(--background-white);
    cursor: pointer;
    padding: calc(var(--spacing) * 1.5);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-content);
}

.theme-toggle:hover {
    background-color: var(--background);
}

.theme-options {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: calc(var(--spacing) * 2);
    background-color: var(--background-white);
    border: 1px solid var(--border-color);
    border-radius: calc(var(--border-radius) * 2);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    min-width: 120px;
}

.theme-switcher.expanded .theme-options {
    display: block !important;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.theme-option {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing) * 3);
    padding: calc(var(--spacing) * 3) calc(var(--spacing) * 4);
    border: none;
    background: none;
    cursor: pointer;
    width: 100%;
    text-align: left;
    font-size: 0.875rem;
    transition: all 0.2s ease;
    /* 默认颜色，会被下面的规则覆盖 */
    color: var(--text-content);
}
.theme-option:hover {
    background-color: #ededed;
}

.theme-option:first-child {
    border-radius: calc(var(--border-radius) * 2) calc(var(--border-radius) * 2) 0 0;
}

.theme-option:last-child {
    border-radius: 0 0 calc(var(--border-radius) * 2) calc(var(--border-radius) * 2);
}

/* 亮色主题下 - 所有选项都是深色文字 */
:root .theme-option {
    color: #374151;
}

:root .theme-option .icon {
    stroke: #374151;
}

/* 暗色主题下 - 所有选项都是浅色文字 */
[data-theme="dark"] .theme-option {
    color: #e5e5e5;
}

[data-theme="dark"] .theme-option:hover {
    background-color: #474747;
}

[data-theme="dark"] .theme-option .icon {
    stroke: #e5e5e5;
}

.icon {
    width: 1rem;
    height: 1rem;
    flex-shrink: 0;
}

/* 暗色主题下的特殊处理 */
[data-theme="dark"] .theme-options {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}


/***********accordion 手风琴样式***********//***********accordion 手风琴样式***********/
.accordion {
    max-width: 16rem;
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: border-color 0.3s ease, background-color 0.3s ease;
    /* 粘性定位 */
    position: sticky;
    top: calc(var(--spacing) * 20); /* 距离顶部的距离，避免被header遮挡 */
    z-index: 100;
    padding: calc(var(--spacing) *2) calc(var(--spacing) * 2);
}

.accordion-header {
    padding: calc(var(--spacing)) calc(var(--spacing) * 2);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
    border-radius: var(--border-radius);
    margin: calc(var(--spacing)) 0;
}


.accordion-title {
    font-size: calc(var(--spacing) * 3.5);
    margin: 0;
    color: inherit;
}

.accordion-icon {
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 8px solid var(--text-muted);
    transition: transform 0.3s ease, border-top-color 0.3s ease;
}

.accordion-header.active .accordion-icon {
    transform: rotate(180deg);
}

.accordion-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.3s ease;
    background-color: var(--background-white);
    overflow: hidden;
}

.accordion-list.active {
    grid-template-rows: 1fr;
}

/* 如果你的HTML结构是直接的li，需要包装一层div */
.accordion-list-content {
    overflow: hidden;
    padding: 0 calc(var(--spacing) * 2);
    margin-top: calc(var(--spacing) * -1);
}

.accordion-list li {
    padding: calc(var(--spacing)) calc(var(--spacing) * 5);
    cursor: pointer;
    transition: background-color 0.2s ease;
    border-radius: var(--border-radius);
    margin: calc(var(--spacing)) 0;
}

.accordion-list li:last-child {
    border-bottom: none;
}

.accordion-list li:hover {
    background-color: var(--background);
}

.accordion-list li.clicked ,.accordion-header.clicked{
    background-color: var(--primary);
    /*color: var(--background-white);*/
    color: #ffffff;
}

.list-title {
    font-size: calc(var(--spacing)*3.5);
    color: var(--text-content);
}

.list-desc {
    font-size: calc(var(--spacing)*3);
    color: var(--text-muted);
    margin-top: calc(var(--spacing));
}

.clicked .list-title {
    color: #ffffff;
}

/* 暗色主题下的特殊处理 */
[data-theme="dark"] .accordion {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .accordion-list li.clicked {
    background-color: var(--primary);
}



.error{
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: calc(100vh - var(--spacing) * 30);
}



.next,.empty{
    display: none;
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
}


@media (max-width: 768px) {
    .left{
        width: 100%;
    }
    .right{
        display: none;
    }
    .choice-card{
        width: 100% !important;
    }
    .tooltip {
        max-width: calc(100vw - 32px);
        font-size: 14px;
        padding: 12px 16px;
        pointer-events: auto; /* 移动端允许触摸tooltip */
    }
    .footer-container{
        grid-template-columns:repeat(1,1fr) !important;
    }
    .col-span-2{
        order: 9;
        margin-top: 1rem;
    }
}