:root {
    --sidebar-width: 20%;
    --main-content-width: calc(100% - var(--sidebar-width));
    --nav-links-width: 65%;
    --language-switch-width: 15%; /* 这是相对于main-content的宽度 */
    --nav-spacing: calc(100% - var(--nav-links-width) - var(--language-switch-width));
}

body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f0f0;
    overflow-x: hidden;
}

.container {
    display: flex;
    min-height: 100vh;
    width: 100%;
    overflow-x: hidden;
}

.sidebar {
    width: var(--sidebar-width);
    background-color: #0047AB;
    color: white;
    padding: 20px;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    width: var(--main-content-width);
    box-sizing: border-box;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    padding-top: 60px;
}

.profile-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    margin: 0 auto 20px;
    background-color: #ffffff;
    object-fit: cover;
    object-position: top;
}

.profile-image-container {
    width: 200px;
    height: 200px;
    margin: 0 auto 20px;
    border-radius: 50%;
    overflow: hidden;
    background-color: #ffffff;
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

h1, h2 {
    margin: 0 0 10px;
}

.sidebar h1 {
    font-size: 24px;
    text-align: center;
}

.sidebar h2 {
    font-size: 18px;
    text-align: center;
    font-weight: normal;
}

.contact-info {
    max-width: 200px;
    margin: 20px auto 0;
    padding: 20px 30px;
}

.contact-info a {
    display: block;
    color: white;
    text-decoration: none;
    margin-bottom: 18px;
    font-size: 18px;
    transition: transform 0.2s;
}

.contact-info a:hover {
    transform: scale(1.2);
}

.contact-info i {
    width: 30px;
    margin-right: 30px;
    font-size: 24px;
}

.nav {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    background-color: white;
    z-index: 999;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #e0e0e0;
    box-sizing: border-box;
    height: 60px;
    width: var(--main-content-width);
}

.nav-links {
    display: flex;
    align-items: center;
    height: 100%;
    width: var(--nav-links-width);
    justify-content: space-between;
}

.nav-links a {
    text-decoration: none;
    color: #333;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    transition: background-color 0.3s;
    flex: 1;
    text-align: center;
    position: relative;
}

.nav-links a span, .nav-links a i {
    position: absolute;
    transition: opacity 0.3s;
}

.nav-links a span {
    opacity: 1;
}
.nav-links a i {
    opacity: 0;
}
.nav-links a:hover span {
    opacity: 0;
}
.nav-links a:hover i {
    opacity: 1;
}
.language-switch {
    display: flex;
    align-items: center;
    height: 100%;
    width: var(--language-switch-width);
    justify-content: flex-end;
    padding-right: 20px;
    /* margin-right: 20px; */
}
.language-switch a {
    color: #0047AB;
    text-decoration: none;
    padding: 0 2%;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    transition: background-color 0.3s;
    position: relative;
    width: 45%;
    margin-left: 5%;
    overflow: hidden;
}
.language-switch a span,
.language-switch a .hover-text {
    transition: opacity 0.3s, transform 0.3s;
    position: absolute;
    width: 100%;
    text-align: center;
}
.language-switch a .hover-text {
    opacity: 0;
    transform: translateY(100%);
}
.language-switch a:hover span {
    opacity: 0;
    transform: translateY(-100%);
}
.language-switch a:hover .hover-text {
    opacity: 1;
    transform: translateY(0);
}
.language-switch a:hover {
    background-color: #f0f0f0;
}

/* 移除之前的特定悬停背景色 */
.language-switch a[href="./index_sp.html"]:hover,
.language-switch a[href="./index_en.html"]:hover {
    background-color: #f0f0f0;
}

.sections {
    margin-top: 20px;
    margin-left: 30px;
    overflow-y: auto;
    flex-grow: 1;
}
.section {
    margin-bottom: 30px;
    scroll-margin-top: 80px;
}
.section h2 {
    color: #0047AB;
    border-bottom: 2px solid #0047AB;
    padding-top: 5px;
    padding-bottom: 10px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}
.section h2 i {
    font-size: 0.8em;
    margin-right: 10px;
}
.education-item, .publication-item {
    margin-top: 15px;
    margin-bottom: 0;
}
.education-item .logo {
    height: 1.2em;
    width: auto;
    padding: 0 2px;
}
.publication-item img {
    max-width: 100%;
    height: auto;
    margin-bottom: 10px;
}
.language-switch a {
    color: #0047AB;
    text-decoration: none;
}
.section a {
    color: #000000;
    text-decoration: none;
    transition: all 0.3s ease;
}

.section a:hover {
    font-weight: bold;
    color: white;
    background-color: #0047AB;
    padding: 2px 5px;
    border-radius: 3px;
}

@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        position: static;
        height: auto;
    }
    .main-content {
        width: 100%;
        margin-left: 0;
        padding-top: 0;
    }
    .nav {
        position: static;
        flex-direction: column;
        align-items: flex-start;
        height: auto;
        padding: 10px 0;
    }
    .nav-links, .language-switch {
        width: 100%;
    }
    .nav a, .language-switch a {
        height: 40px;
        padding: 0 20px;
    }
    .language-switch {
        margin-left: 0;
    }
    .section {
        scroll-margin-top: 0;
    }
}

.production-item p {
    margin-left: 0;
}

.item {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    margin-bottom: 15px;
}
.item .header {
    display: flex;
    width: 100%;
    align-items: baseline;
}
.item time {
    width: 240px;
    flex-shrink: 0;
    display: flex;
    justify-content: space-between;
}
.item .title {
    font-weight: bold;
    flex-grow: 1;
    padding-left: 20px;
}
.item .details {
    width: 100%;
    padding-left: 20px;
    box-sizing: border-box;
    margin-top: 5px;
}
.item .details p {
    margin: 0;
}

.logo {
    height: 1.3em;
    width: auto;
    margin-right: 5px;
    vertical-align: middle;
}

.skill {
    list-style-type: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 5px;
    margin-bottom: 10px;
}

.skill::before {
    content: attr(data-label);
    margin-right: 10px;
    align-self: center;
}

.skill li {
    background-color: #dddbdb;
    color: #000435;
    font-weight: bold;
    padding: 5px 10px;
    border-radius: 15px;
    font-size: 0.9em;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.skill li:hover::after {
    content: attr(data-text);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(1.1);
    font-size: 1em;
    white-space: nowrap;
    color: #573f00;
}

.skill li:hover > span {
    opacity: 0;
}

.skill li::after {
    content: attr(data-text);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.9em;
    white-space: nowrap;
    color: #0047AB;
    opacity: 0;
    transition: all 0.3s ease;
}

.skill li:hover::after {
    opacity: 1;
}