/* 全局重置与盒模型 */
*,
*::before,
*::after {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

/* 基础样式 */
body {
    line-height: 1.7em;
    -webkit-font-smoothing: antialiased;
    font-size: var(--font-size);
    background-color: var(--main-bg-color);
    background-image: var(--base-main-bg-img);
    background-size: 20px 20px;
    color: var(--font-color);
    font-family: 'Open Sans', 'Helvetica Neue', Helvetica, 'BBAlpha Sans', 'S60 Sans', Arial,
        'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif !important;
}

/* 图片、视频、画布、SVG */
img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
}

/* 表单元素继承字体 */
input,
button,
textarea,
select {
    font: inherit;
}

/* 文本元素换行 */
p,
h1,
h2,
h3,
h4,
h5,
h6 {
    overflow-wrap: break-word;
    text-wrap: balance;
}

p {
    text-wrap: pretty;
}

/* 特定容器隔离 */
#root,
#__next {
    isolation: isolate;
}

/* 列表项 */
ul li,
ol li {
    margin-left: 2em;
}

ul li p,
ol li p {
    text-indent: 0;
    /* 移除 !important */
}

/* 居中元素 */
center,
img {
    margin: 0.2em auto 1em;
}

/* 链接样式 */
a,
.link {
    color: var(--base-color);
    text-decoration: none;
    transition: transform 0.5s ease-in-out;
}

a:hover,
a:active,
.link:hover,
.link:active {
    transform: scale(1.2);
    text-decoration: underline;
}

/* 图标样式 */
.icon {
    display: inline-block;
    cursor: pointer;
    transition: transform 0.3s ease, font-weight 0.3s ease;
}

.icon:hover {
    font-weight: bolder;
    transform: scale(1.1);
}

/* 引用块 */
blockquote {
    padding: 0 1em;
    margin: 2em 0;
    font-weight: bold;
    border-left: 4px solid #99cff6;
}

/* 区块与内容布局 */
section {
    width: 100%;
}

.container {
    align-items: center;
    position: relative;
    margin: 0 auto;
    margin-top: var(--container-margin-top);
    -ms-overflow-style: none;
    scrollbar-width: none;
    width: var(--base-width);
    color: var(--font-color);
    box-sizing: border-box;
}

.container .note-top {
    position: absolute;
    top: 0;
    width: 100%;
    height: var(--note-top-height);
    background: url('/assets/notetop.png') no-repeat;
    background-size: 100% 100%;
    z-index: 999;
    pointer-events: none;
}

.container .note-body {
    background-color: var(--main-bg-color);
    box-shadow: 1px 2px 7px #d6d6d6;
}

.container .note-body .note-body-inner {
    padding: var(--note-body-gap) 0.5em 0;
}

.container .note-bottom {
    position: relative;
    bottom: var(--note-bottom);
    width: 100%;
    height: var(--note-bottom-height);
    background-image: var(--note-bottom-img);
    background-size: 100%;
    background-repeat: no-repeat;
}

.container .container-inner {
    min-height: var(--container-height-min);
    display: flex;
    justify-content: space-between;
    gap: 0.5em;
    width: inherit;
    background-color: inherit;
    color: inherit;
}

.container .toc-btn {
    transition: all ease 1s;
}

.container .toc-btn.active {
    rotate: 90deg;
}

.container .side-bar {
    overflow: hidden;
    font-size: var(--font-size-s);
    transition: max-height ease 1s;
    max-height: 0vh;
}

.container .side-bar .side-bar-body {
    position: relative;
    width: 100%;
    padding: 0.5em;
    margin: 2em 0;
    border-radius: 0.2em;
    background-color: var(--sider-bg-color);
}

.container .side-bar .side-bar-body .side-bar-head {
    position: absolute;
    top: -1.5em;
    left: 45%;
    width: 3em;
    height: 3em;
    cursor: pointer;
    background-image: url('/assets/tag.png');
    background-size: 100%;
    background-repeat: no-repeat;
}

.container .side-bar .side-bar-body .side-bar-content {
    display: flex;
    flex-direction: column;
    gap: 1em;
    width: 100%;
}

.container .side-bar .side-bar-body .side-bar-content ul {
    width: 100%;
    list-style: none;
}

.container .side-bar .side-bar-body .side-bar-content ul li {
    margin: 0.5em 1em;
}

.container .side-bar .side-bar-body .side-bar-content ul li a {
    color: inherit;
    text-decoration: underline;
}

.container .side-bar .side-bar-body .side-bar-content .side-bar-intro {
    font-size: var(--font-size-s);
}

.container .side-bar .side-bar-body .side-bar-content .search form {
    display: flex;
    gap: 0.1em;
    width: 100%;
}

.container .side-bar .side-bar-body .side-bar-content .search input {
    flex: 1;
    min-width: 6em;
    padding: 0.2em;
    border: 1px solid gray;
    border-radius: 0.2em;
    outline: none;
    background-color: var(--input-bg-color);
    color: var(--font-color);
}

.container .side-bar .side-bar-body .side-bar-content .search input:focus-visible {
    outline: none;
    border-color: var(--base-color);
}

.container .side-bar .side-bar-body .side-bar-content .search button {
    width: 1.5em;
}

.container .side-bar .side-bar-body .side-bar-content .search button svg {
    width: 1em;
    height: 1em;
    margin: 0 auto;
}

.container .content-wrapper {
    flex: 1;
    padding: 0 var(--content-h-padding);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    overflow: hidden;
}

.container .content-wrapper .content {
    flex: 1;
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
}

.container .content-wrapper .content p.head-item {
    text-indent: 0;
}

.container .gap {
    color: rgba(53, 64, 80, 0.388);
}

.centroid {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 头部导航 */
.header {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    width: 100%;
    background-color: var(--base-color);
}

/* 返回顶部按钮 */
.upper {
    position: fixed;
    bottom: 1em;
    right: 1em;
    width: 2.5em;
    height: 2.5em;
    opacity: 0;
    border-radius: 0.2em;
    transition: opacity 0.5s ease-in-out;
    cursor: pointer;
    background-color: var(--base-color);
    z-index: 999;
}

.upper a {
    display: flex;
    justify-content: center;
    align-items: center;
    width: inherit;
    height: inherit;
    color: #fff;
    text-decoration: none;
}

.upper a:active,
.upper a:hover {
    transform: scale(1.1);
}

/* 页脚 */
footer {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    padding: var(--footer-padding-size) 0;
    margin-top: 2em;
    border-top: 1px solid var(--border-color);
    gap: 4em;
}

footer .footer-item {
    display: flex;
    justify-content: center;
    align-items: center;
}

footer .footer-item span {
    font-size: var(--font-size-s);
}

footer .footer-item a {
    display: flex;
    justify-content: center;
    align-items: center;
}

footer .footer-item svg {
    width: var(--footer-icon-size);
    height: var(--footer-icon-size);
    border-radius: 3px;
    fill: var(--base-color);
}

/* 导航栏 */
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 0.5em;
    margin: 0;
    text-align: left;
    font-size: var(--font-size-s);
    color: gray;
    border-bottom: 1px solid var(--border-color);
    box-sizing: border-box;
}

.nav .nav-inner {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav .icon {
    margin-left: 3px;
}

.nav .icon svg {
    width: var(--nav-icon-size);
    height: var(--nav-icon-size);
}

/* 懒加载图片 */
.lazy-img-wrapper {
    display: block;
    min-height: 100px;
    background-image: url(/assets/loading.gif);
    background-repeat: no-repeat;
    background-position: center;
    background-size: 2em;
}

.lazy-img-wrapper img {
    opacity: 0;
    display: block;
    width: 100%;
    margin: 0 auto;
    border-radius: 0.1em;
    transition: opacity 1s ease-in-out;
}

/* 标题字体大小统一管理 */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-size: var(--font-size);
}

/* 文章列表 */
.post-list {
    width: 100%;
}

.post-list .post-item {
    display: flex;
    gap: 0.5em;
    width: 100%;
}

.post-list .post-item .post-item-body {
    flex: 9;
    padding: 0.5em 0;
    border-bottom: 1px solid var(--border-color);
}

.post-list .post-item .post-item-body .body-text {
    display: flex;
    flex-direction: column;
    gap: 0.4em;
    min-height: 5em;
    padding: 0.5em;
    font-size: var(--font-size);
    word-break: break-all;
}

.post-list .post-item .post-item-body .body-text .blog-opt {
    font-size: var(--font-size-s);
    margin: 0.5em 0;
    text-indent: 0;
}

.post-list .post-item .post-item-body .body-text .blog-intro {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
    overflow: hidden;
    min-height: 4em;
}

.post-list .post-item .post-item-body .body-text p {
    text-indent: 2em;
}

.post-list .post-item .post-item-body .body-text p.post-title {
    text-indent: 0;
    line-height: 1em;
}

.post-list .post-item .post-item-body .body-text img {
    display: block;
    width: 100%;
    margin: 0.5em auto;
    border-radius: 0.5em;
}

.post-list .post-item .post-item-timeline {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--font-color);
    font-size: var(--timeline-font-size);
    border: none;
    border-left: 1px solid var(--border-color);
}

.post-list .post-item .post-item-timeline .timeline {
    position: relative;
    left: -0.45em;
}

.post-list .post-item .post-item-timeline .timeline .timeline-date {
    margin: 0 0.3em;
}

/* 主题切换 */
#theme-switch svg:last-child {
    display: none;
}

.darkmode #theme-switch svg:first-child {
    display: none;
}

.darkmode #theme-switch svg:last-child {
    display: block;
}

/* 提示类 */
.tip {
    font-size: var(--font-size-tip);
    border: none;
}

.tip.update {
    color: gray;
}

/* 水平居中 */
.h-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 分隔线 */
hr {
    width: 100%;
    margin: 0.5em 0;
    border-top: 1px solid var(--border-color);
}

/* 输入框和文本域 */
input,
textarea {
    color: var(--font-color);
    padding: 0.2em;
    border: 1px solid gray;
    border-radius: 0.2em;
    outline: none;
    background-color: var(--input-bg-color);
}

input:focus-visible,
textarea:focus-visible {
    outline: none;
    border-color: var(--base-color);
}

/* Details 和 Summary */
details summary {
    cursor: pointer;
}