@import url("https://fonts.googleapis.com/css?family=Open+Sans");
* {
  box-sizing: border-box;
}

body {
  padding: 30px 200px;
  background-color: #eaeaea;
  font-family: 'Open Sans', sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  color: #000;
  font-weight: 200;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
}

section {
  padding: 30px 0;
  text-align: center;
}
section#title {
  text-align: center;
  width: 100vw;
  margin-left: -200px;
  padding: 30px 200px;
  background-color: #F5F5F5;
}
section title_h {
  text-align: center;
}

section#about {
  text-align: center;
}

section h1 {
  text-align: center;
}

.container {
  padding: 0px 15px 0px 15px;
}
@media (min-width: 0) {
  .container {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
  }
  .container:after {
    content: " ";
    display: block;
    clear: both;
  }
}
@media (min-width: 576px) {
  .container {
    max-width: 540px;
    margin-left: auto;
    margin-right: auto;
  }
  .container:after {
    content: " ";
    display: block;
    clear: both;
  }
}
@media (min-width: 768px) {
  .container {
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
  }
  .container:after {
    content: " ";
    display: block;
    clear: both;
  }
}
@media (min-width: 992px) {
  .container {
    max-width: 960px;
    margin-left: auto;
    margin-right: auto;
  }
  .container:after {
    content: " ";
    display: block;
    clear: both;
  }
}
@media (min-width: 1200px) {
  .container {
    max-width: 1170px;
    margin-left: auto;
    margin-right: auto;
  }
  .container:after {
    content: " ";
    display: block;
    clear: both;
  }
}

a {
  text-decoration: none;
  color: #2261c6;
}
a:hover, a :focus {
  color: black;
}
.menu-left a {
  color: rgba(34, 34, 34, 0.8);
}

.menu-left a {
  display: inline-block;
  position: relative;
  padding-bottom: 0px;
  transition: color .35s ease;
}
.menu-left a:before {
  content: '';
  display: block;
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  transition: width 0s ease, background .35s ease;
}
.menu-left a:after {
  content: '';
  display: block;
  position: absolute;
  right: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background: #000;
  transition: width .35s ease;
}
.menu-left a:hover:before {
  width: 100%;
  background: #000;
  transition: width .35s ease;
}
.menu-left a:hover:after {
  width: 100%;
  background: transparent;
  transition: all 0s ease;
}

header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: .5rem 0;
  background: rgba(255, 255, 255, 0.92);
  z-index: 3;
  will-change: transform;
  transition: background 0.3s, -webkit-transform 0.5s cubic-bezier(0.694, 0.048, 0.335, 1);
  transition: transform 0.5s cubic-bezier(0.694, 0.048, 0.335, 1), background 0.3s;
  transition: transform 0.5s cubic-bezier(0.694, 0.048, 0.335, 1), background 0.3s, -webkit-transform 0.5s cubic-bezier(0.694, 0.048, 0.335, 1);
  transform: translateY(0);
  -webkit-transform: translateY(0);
}
header nav .logo {
  float: left;
  padding-top: .25rem;
  padding-bottom: .25rem;
  margin-right: 1rem;
  font-size: 1.25rem;
  line-height: inherit;
  font-weight: 500;
  color: black;
}
header nav .logo:after {
  content: '';
  display: table;
  clear: both;
}
header nav ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}
header nav ul li {
  float: none;
  margin-left: 0;
}
@media (min-width: 768px) {
  header nav ul li {
    float: left;
    margin-left: 1rem;
  }
}
header nav ul li a {
  display: block;
}
@media (min-width: 576px) {
  header nav ul li a {
    display: block;
    padding: .425rem 0rem;
  }
}

@media (max-width: 768px) {
  ul {
    clear: both;
  }
  ul li {
    padding: .5em 0;
  }
}
.hide-nav {
  transform: translateY(-120%) !important;
  -webkit-transform: translateY(-120%) !important;
}

ul.menu-left {
  display: block;
  max-height: 0;
  overflow: hidden;
  -webkit-transition: all 0.3s ease-out;
  -moz-transition: all 0.3s ease-out;
  -ms-transition: all 0.3s ease-out;
  -o-transition: all 0.3s ease-out;
  transition: all 0.3s ease-out;
  z-index: 10;
}
@media (min-width: 768px) {
  ul.menu-left {
    display: block !important;
    float: right;
    max-height: none;
  }
}
ul.menu-left:before {
  content: '';
  display: table;
  clear: both;
}
ul.menu-left.collapse {
  max-height: 15em !important;
}

.nav-toggle {
  display: block;
  border-radius: 5px;
  background-color: transparent;
  float: right;
  height: 38px;
  width: 38px;
  cursor: pointer;
  padding: 8px 8px;
}
.nav-toggle.open span:first-child {
  transform: rotate(45deg) translate(4.4px, 4.4px);
}
.nav-toggle.open span:nth-child(2) {
  width: 0%;
  opacity: 0;
}
.nav-toggle.open span:last-child {
  transform: rotate(-45deg) translate(4.4px, -4.4px);
}
@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }
}
.nav-toggle span {
  position: relative;
  display: block;
  height: 2px;
  width: 100%;
  margin-top: 4px;
  background-color: #000;
  transition: all .25s;
}

/* ================= 作者样式 ================= */
.authors-container {
  max-width: 800px;
  margin: 1rem auto;
  padding: 0 20px;
}

.authors-title {
  color: #2d3b4d; 
  font-size: 1.4rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 1rem;
}

.authors-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem; 
}

.author-name {
  font-family: 'Arial', monospace;  
  font-size: 1rem;
  font-weight: 500;
  color: #3b82f6; 
  text-decoration: underline;
}

.author-disabled {
  pointer-events:none;
  color: #000; 
  text-decoration: none;
}

/* =============== contribution样式，序列，左边对齐 ================ */
.definition-item {
  display: flex; 
  align-items: flex-start; 
}

.definition-item .number {
  flex: 0 0 1em; 
  text-align: right; 
  margin-right: 0.5em; 
}

.definition-item span {
  flex: 1; 
}

/* ============ video样式 ============ */
#Video {
  width: 80vw;
}

#Video .container {
  width: 62%;
  margin: auto;
}

/* ============= 数字/希腊字母样式 ============= */
/* 为数字添加样式 */
span.math-number {
  font-family: 'Times New Roman', monospace;  
  font-weight: 400; 
  font-size: 1.2rem;
}

/* 为希腊字母添加样式 */
span.greek-letter {
  font-family: 'Arial', sans-serif;  
  font-style: italic; 
  font-size: 1.1rem;
  color: #2a9d8f;  
  background-color: #f1faee;  
  padding: 0px 4px 2px; 
  border-radius: 4px; 
}

/* ================== 表格样式 ================== */
/* 核心容器 */
.scientific-figure {
  margin: 1rem auto;
  max-width: min(100%, 800px); 
}

/* 内容容器 */
.figure-content {
  position: relative;
  width: fit-content; 
  margin: 0 auto; 
  background: #fff;
  border: 1px solid #e0e7ed;
}

/* 图片精确控制 */
.strict-image {
  display: block;
  width: auto; 
  max-width: 100%; 
  height: auto;
  margin: 0 auto; 
}

/* 标题修正 */
.scientific-caption {
  width: fit-content; 
  max-width: 100%;
  margin: 4px auto 0; 
  padding: 6px 12px;
  color: #2d3b4d;
  font-size: 14px;
  text-align: center;
}