@charset "utf-8";
/* CSS Document */

/* ============================================
   英文会议页面字体系统 - 纯系统字体方案
   兼容所有系统，无需外部字体加载
============================================ */

/* 基础字体栈定义 */
:root {
  /* 主字体栈：优先使用现代系统字体 */
  --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  
  /* 等宽字体栈：代码和技术内容 */
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  /* 可选的装饰性字体栈（用于大标题） */
  --font-decorative: "Arial Black", "Arial Bold", Gadget, sans-serif;
  
  /* 颜色变量 */
  --color-primary: #2c3e50;
 --color-secondary: #7f8c8d;
 --color-accent: #2980b9;
 --color-light: #95a5a6;
 --color-code-bg: #f8f9fa;
 --color-border: #ecf0f1;
  
  /* 字体大小阶梯 */
  --font-size-xs: 0.75rem;   /* 12px */
 --font-size-sm: 0.875rem;  /* 14px */
 --font-size-base: 1rem;    /* 16px */
 --font-size-lg: 1.125rem;  /* 18px */
 --font-size-xl: 1.25rem;   /* 20px */
 --font-size-2xl: 1.5rem;   /* 24px */
 --font-size-3xl: 1.875rem; /* 30px */
 --font-size-4xl: 2.25rem;  /* 36px */
 --font-size-5xl: 3rem;     /* 48px */
  
  /* 行高标准 */
  --line-height-tight: 1.25;
 --line-height-normal: 1.5;
 --line-height-relaxed: 1.75;
}
/* ========== 全局基础样式 ========== */
* {
	box-sizing: border-box;
}
/* ============================================
页面容器 - 1500px固定宽度，支持自动缩放
============================================ */
body {
	font-family: var(--font-primary);
	font-size: var(--font-size-base);
	line-height: var(--line-height-normal);
	color: var(--color-primary);
	background-color: #fff;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	overflow-x: hidden;
	width: 100%;
	max-width: 1380px; /* 最大宽度1500px */
	margin: 0 auto;
	padding: 0;
	padding-top: 180px; /* 与导航栏高度匹配 */
	box-shadow: 0 0 30px rgba(0, 0, 0, 0.1);
	min-height: 100vh;
}
        
        /* ============================================
           响应式缩放 - 小于1500px时自动缩放
        ============================================ */
        @media screen and (max-width: 1500px) {
body {
	transform: scale(calc(100vw / 1380));
	transform-origin: top left;
	width: 1380px; /* 保持原始宽度 */
	height: calc(100vh / (100vw / 1380)); /* 调整高度以保持比例 */
	min-height: calc(100vh / (100vw / 1380));
	overflow-x: hidden;
}
/* 防止滚动条在缩放时出现 */
html {
	overflow-x: hidden;
	width: 100%;
}
}
/* ========== 标题层级 ========== */
h1, .h1 {
	font-family: var(--font-primary);
	font-size: var(--font-size-xl);
	font-weight: 500; /* 超粗体 */
	line-height: var(--line-height-tight);
	margin-top: 0;
	margin-bottom: 0.5em;
	color: var(--color-primary);
	letter-spacing: -0.5px;
	text-transform: uppercase;
}
h2, .h2 {
	font-family: var(--font-primary);
	font-size: var(--font-size-2xl);
	font-weight: 500; /* 粗体 */
	line-height: var(--line-height-tight);
	margin-top: 1.2em;
	margin-bottom: 0.5em;
	color: var(--color-primary);
	padding-bottom: 0.3em;
	border-bottom: 2px solid var(--color-border);
}
h3, .h3 {
	font-family: var(--font-primary);
	font-size: var(--font-size-2xl);
	font-weight: 500; /* 中等粗体 */
	line-height: var(--line-height-tight);
	margin-top: 1em;
	margin-bottom: 0.5em;
	color: var(--color-primary);
}
h4, .h4 {
	font-family: var(--font-primary);
	font-size: var(--font-size-2xl);
	font-weight: 500;
	line-height: var(--line-height-normal);
	margin-top: 0.5em;
	margin-bottom: 0.5em;
	color: var(--color-primary);
}
h5, .h5 {
	font-family: var(--font-primary);
	font-size: var(--font-size-xl);
	font-weight: 500;
	line-height: var(--line-height-normal);
	margin-top: 0.5em;
	margin-bottom: 0.5em;
	color: var(--color-secondary);
}
h6, .h6 {
	font-family: var(--font-primary);
	font-size: var(--font-size-lg);
	font-weight: 500;
	line-height: var(--line-height-normal);
	margin-top: 0.5em;
	margin-bottom: 0.5em;
	color: var(--color-light);
	text-transform: uppercase;
	letter-spacing: 0.5px;
}
/* ========== 导航/菜单样式 ========== */
.site-header {
	font-family: var(--font-primary);
	font-weight: 600;
	font-size: var(--font-size-base);
}
.main-nav a {
	font-weight: 600;
	text-decoration: none;
	color: var(--color-primary);
	transition: color 0.2s;
}
.main-nav a:hover {
	color: var(--color-accent);
}
/* ========== 页面特定组件 ========== */
/* 会议标题/横幅 */
.conference-title {
	font-family: var(--font-primary);
	font-size: var(--font-size-5xl);
	font-weight: 800;
	letter-spacing: -0.5px;
	color: #fff;
	background-color: var(--color-accent);
	padding: 2rem;
	text-align: center;
	margin-bottom: 2rem;
}
/* 导航菜单项 */
.menu-item {
	font-weight: 600;
	text-transform: uppercase;
	font-size: var(--font-size-sm);
	letter-spacing: 0.5px;
}
/* 会议委员会名单 */
.committee-list {
	font-family: var(--font-primary);
}
.committee-member {
	font-weight: 500;
	margin-bottom: 0.5rem;
}
.committee-title {
	font-size: var(--font-size-sm);
	color: var(--color-secondary);
	font-weight: normal;
}
/* 演讲者信息 */
.speaker-name {
	font-size: var(--font-size-2xl);
	font-weight: 700;
	margin-bottom: 0.2rem;
}
.speaker-title {
	font-size: var(--font-size-lg);
	font-weight: 500;
	color: var(--color-accent);
	margin-bottom: 0.5rem;
}
.speaker-org {
	font-size: var(--font-size-base);
	font-weight: normal;
	color: var(--color-secondary);
	font-style: italic;
}
/* Call for Papers 部分 */
.cfp-deadline {
	font-weight: 700;
	color: #e74c3c; /* 红色突出截止日期 */
	background-color: #ffeaea;
	padding: 0.2rem 0.5rem;
	border-radius: 3px;
}
.cfp-important {
	font-weight: 600;
	border-left: 4px solid var(--color-accent);
	padding-left: 1rem;
	margin: 1.5rem 0;
}
/* 作者指南 */
.author-guidelines ol, .author-guidelines ul {
	font-size: var(--font-size-base);
	line-height: var(--line-height-relaxed);
}
.author-guidelines li {
	margin-bottom: 0.5rem;
}
/* 通用信息 */
.info-box {
	background-color: #f8f9fa;
	border-left: 4px solid var(--color-accent);
	padding: 1.5rem;
	margin: 1.5rem 0;
	font-size: var(--font-size-base);
	line-height: var(--line-height-relaxed);
}
.info-title {
	font-weight: 700;
	margin-bottom: 0.5rem;
	color: var(--color-accent);
}
/* 关于会议部分 */
.about-conference {
	line-height: var(--line-height-relaxed);
}
/* ========== 通用文本样式 ========== */
p {
	margin-top: 0;
	margin-bottom: 1rem;
	line-height: var(--line-height-relaxed);
}
.lead {
	font-size: var(--font-size-lg);
	font-weight: 300;
	line-height: var(--line-height-relaxed);
	color: var(--color-secondary);
}
.small {
	font-size: var(--font-size-sm);
	color: var(--color-light);
}
.strong {
	font-weight: 700;
}
.em {
	font-style: italic;
}
/* ========== 代码和预格式化文本 ========== */
code, kbd, pre, samp {
	font-family: var(--font-mono);
	font-size: var(--font-size-sm);
}
code {
	background-color: var(--color-code-bg);
	padding: 0.2em 0.4em;
	border-radius: 3px;
	color: #d63384;
}
pre {
	background-color: var(--color-code-bg);
	border: 1px solid var(--color-border);
	border-radius: 6px;
	padding: 1rem;
	overflow: auto;
	line-height: var(--line-height-normal);
}
pre code {
	background-color: transparent;
	padding: 0;
	color: inherit;
}
/* ========== 链接和按钮 ========== */
a {
	color: var(--color-accent);
	text-decoration: none;
}
a:hover {
	text-decoration: underline;
}
.btn {
	display: inline-block;
	font-family: var(--font-primary);
	font-weight: 600;
	font-size: var(--font-size-base);
	padding: 0.75rem 1.5rem;
	border-radius: 4px;
	text-align: center;
	cursor: pointer;
	border: none;
	transition: all 0.2s;
}
.btn-primary {
	background-color: var(--color-accent);
	color: white;
}
.btn-primary:hover {
	background-color: #1a5276;
	text-decoration: none;
}
/* ========== 表格样式 ========== */
table {
	font-family: var(--font-primary);
	border-collapse: collapse;
	width: 100%;
	margin: 0.5rem 0;
	font-size: var(--font-size-base);
}
th {
	font-weight: 700;
	text-align: left;
	background-color: #f8f9fa;
	padding: 0.75rem;
	border-bottom: 2px solid var(--color-border);
}
td {
	padding: 0.75rem;
	border-bottom: 1px solid var(--color-border);
}
/* ========== 列表样式 ========== */
ul, ol {
	padding-left: 1.5rem;
	margin-bottom: 1rem;
	line-height: var(--line-height-relaxed);
}
li {
	margin-bottom: 0.5rem;
}
/* ========== 辅助类 ========== */
.text-center {
	text-align: center;
}
.text-right {
	text-align: right;
}
.text-uppercase {
	text-transform: uppercase;
	letter-spacing: 0.5px;
}
.font-light {
	font-weight: 300;
}
.font-normal {
	font-weight: 400;
}
.font-medium {
	font-weight: 500;
}
.font-semibold {
	font-weight: 600;
}
.font-bold {
	font-weight: 700;
}
.font-extrabold {
	font-weight: 800;
}
/* ========== 表单样式 ========== */
/* Fieldset Styling */
fieldset {
	border: 1px solid #AAA;
	border-radius: 6px;
	padding: 30px;
	margin-bottom: 30px;
	background-color: #f9fafb;
	transition: border-color 0.3s ease;
}
fieldset:hover {
	border-color: #666;
}
fieldset:last-of-type {
	margin-bottom: 0;
}
/* Legend Styling */
legend {
	font-size: 1.1rem;
	font-weight: 600;
	color: #2d3748;
	padding: 0 15px;
	background-color: #edf2f7;
	border-radius: 4px;
	border: 1px solid #666;
	width: auto;
	margin-left: 20px;
}
/* Form Group Styling */
.form-group {
	margin-bottom: 15px;
	position: relative;
}
.form-group:last-of-type {
	margin-bottom: 0;
}
/* Label Styling */
label {
	display: block;
	font-weight: 600;
	margin-bottom: 8px;
	color: #2d3748;
	font-size: 0.9rem;
}
.required::after {
	content: " *";
	color: #e53e3e;
}
.field-hint {
	font-size: 0.9rem;
	color: #718096;
	margin-top: 4px;
	font-style: italic;
}
/* Input, Select, Textarea Styling */
input[type="text"],  input[type="email"],  input[type="tel"],  input[type="password"],  input[type="date"],  input[type="number"],  input[type="url"],  select,  textarea {
	width: 100%;
	padding: 6px 7px;
	border: 1px solid #cbd5e0;
	border-radius: 4px;
	font-size: 0.9rem;
	transition: all 0.3s ease;
	background-color: white;
	color: #2d3748;
}
input:focus,  select:focus,  textarea:focus {
	outline: none;
	border-color: #3182ce;
	box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.1);
}
textarea {
	min-height: 150px;
	resize: vertical;
	font-family: inherit;
}
/* Select Styling */
select {
	appearance: none;
	background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%234a5568' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
	background-repeat: no-repeat;
	background-position: right 15px center;
	background-size: 16px;
	padding-right: 40px;
}
/* Radio and Checkbox Styling */
.radio-group,  .checkbox-group {
	display: flex;
	flex-wrap: wrap;
	gap: 20px;
	margin-top: 10px;
}
.radio-option,  .checkbox-option {
	display: flex;
	align-items: center;
}
input[type="radio"],  input[type="checkbox"] {
	margin-right: 8px;
	width: 18px;
	height: 18px;
	accent-color: #3182ce;
}
/* File Input Styling */
.file-input-container {
	position: relative;
}
.file-input {
	padding: 10px;
	border: 1px dashed #cbd5e0;
	border-radius: 4px;
	text-align: center;
	background-color: #f7fafc;
	cursor: pointer;
	transition: all 0.3s ease;
}
.file-input:hover {
	background-color: #edf2f7;
	border-color: #a0aec0;
}
.file-input input[type="file"] {
	position: absolute;
	left: 0;
	top: 0;
	opacity: 0;
	width: 100%;
	height: 100%;
	cursor: pointer;
}
/* Submit Button Styling */
.submit-section {
	text-align: center;
	margin-top: 40px;
	padding-top: 30px;
	border-top: 1px solid #e2e8f0;
}
button[type="submit"],  button[type="reset"] {
	padding: 14px 30px;
	border: none;
	border-radius: 4px;
	font-size: 1.1rem;
	font-weight: 600;
	cursor: pointer;
	transition: all 0.3s ease;
	margin: 0 10px;
}
button[type="submit"] {
	background-color: #1a365d;
	color: white;
}
button[type="submit"]:hover {
	background-color: #2d3748;
	transform: translateY(-2px);
	box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}
button[type="reset"] {
	background-color: #e2e8f0;
	color: #4a5568;
}
button[type="reset"]:hover {
	background-color: #cbd5e0;
}
        
/* Validation Styling */
input:valid:not(:placeholder-shown) {
 border-color: #38a169;
}
 input:invalid:not(:placeholder-shown) {
 border-color: #e53e3e;
}
.validation-message {
	font-size: 0.9rem;
	margin-top: 5px;
	display: none;
}
 input:invalid:not(:placeholder-shown) + .validation-message {
 display: block;
 color: #e53e3e;
}
/*绿色斜体文字标注*/
.green-annotation {
font-style: italic;
color: #1b5e20;
}
/*增加减少作者按钮*/
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    margin-right: 10px;
    transition: all 0.3s;
}

.btn-primary {
    background-color: #007bff;
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background-color: #0056b3;
}

.btn-secondary {
    background-color: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background-color: #545b62;
}

.btn:disabled {
    cursor: not-allowed;
}

.btn i {
    margin-right: 8px;
}
/* Responsive Design */
@media (max-width: 768px) {
.form-container {
	padding: 20px;
}
fieldset {
	padding: 20px;
}
legend {
	font-size: 1.2rem;
}
.radio-group,  .checkbox-group {
	flex-direction: column;
	gap: 10px;
}
button[type="submit"],  button[type="reset"] {
	width: 100%;
	margin: 5px 0;
}
}
/* Academic Footer */
.academic-footer {
	text-align: center;
	margin-top: 40px;
	padding-top: 20px;
	border-top: 1px solid #d4d4d4;
	color: #718096;
	font-size: 0.9rem;
}
.academic-footer a {
	color: #3182ce;
	text-decoration: none;
}
.academic-footer a:hover {
	text-decoration: underline;
}
/* Icons */
.form-icon {
	position: absolute;
	right: 12px;
	top: 37px;
	color: #a0aec0;
}
.legend-icon {
	margin-right: 8px;
}

/* ========== 响应式调整 ========== */
@media (max-width: 768px) {
:root {
 --font-size-5xl: 2.25rem;
 --font-size-4xl: 2rem;
 --font-size-3xl: 1.75rem;
 --font-size-2xl: 1.5rem;
}
body {
	font-size: var(--font-size-sm);
}
.conference-title {
	font-size: var(--font-size-4xl);
	padding: 1.5rem 1rem;
}
}
/* 底部黑色表格样式 */
.dark-table {
	width: 100%;
	background-color: #000000;
	color: #ffffff;
	border-collapse: separate;
	border-spacing: 0;
	border-radius: 8px;
	overflow: hidden;
	box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
	margin: 2rem 0;
	font-family: var(--font-primary);
}
/* 表格标题 */
.dark-table caption {
	font-size: var(--font-size-xl);
	font-weight: 700;
	text-align: left;
	padding: 1.5rem 1.5rem 1rem;
	background-color: #000000;
	color: #ffffff;
	caption-side: top;
	border-bottom: 2px solid #333333;
}
/* 表格单元格样式 */
.dark-table td {
	padding: 1.25rem 1.5rem;
	border-bottom: 1px solid #333333;
	border-right: 1px solid #333333;
	font-size: var(--font-size-base);
	line-height: var(--line-height-normal);
}
.dark-table td:last-child {
	border-right: none;
}
.dark-table tbody tr:last-child td {
	border-bottom: none;
}
/* 白色链接样式 */
.dark-table a {
	color: #ffffff;
	text-decoration: none;
	font-weight: 600;
	border-bottom: 1px solid rgba(255, 255, 255, 0.3);
	transition: all 0.3s;
	padding-bottom: 1px;
}
.dark-table a:hover {
	color: #f0f0f0;
	border-bottom-color: #ffffff;
	text-decoration: none;
}

/* ============================================
   悬浮通栏导航栏样式
=========================================== */

/* 基础导航栏样式 */
.floating-navbar {
	position: fixed;
	top: 0;
	margin-left: auto;
	margin-right: auto;
	width: 1380px;
	background-color: #FFF;
	z-index: 1000;
	box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
	transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
	border-bottom: 1px solid rgba(255, 255, 255, 0.1);
	transform: translateY(0);
	overflow: visible;
}
.main-nav {
	position: relative;
	top: 15px;
	left: 0px;
}
/* 主菜单水平排列 */
.main-menu {
	list-style: none;
	display: flex;
	position: relative;
}
.main-menu > li {
	position: relative;
	padding-right: 30px;
}
/* 一级菜单项样式 */
.main-menu > li > a {
	color: white;
	text-decoration: none;
	display: block;
	padding: 15px 25px;
	transition: background 0.3s;
}
.main-menu > li > a:hover {
	background: #555;
}
/* 二级菜单 - 初始隐藏 */
.submenu {
	list-style: none;
	position: absolute;
	top: 100%;
	left: 0;
	background: white;
	min-width: 180px;
	box-shadow: 0 3px 10px rgba(0,0,0,0.2);
	border-radius: 0 0 4px 4px;
	display: none; /* 初始隐藏，由jQuery控制 */
	z-index: 2000;
}
/* 二级菜单项样式 */
.submenu li a {
	display: block;
	padding: 12px 20px;
	color: #333;
	text-decoration: none;
	border-bottom: 1px solid #f0f0f0;
	transition: background 0.2s;
}
.submenu li:last-child a {
	border-bottom: none;
}
.submenu li a:hover {
	background: #f5f5f5;
	color: #0066cc;
}
/* 二级菜单使用固定宽度，并扩展至导航栏外部 */
.has-submenu .submenu {
	position: absolute;
	top: 100%;
	left: 0;
	min-width: 200px;
	/* 可以设置一个很大的宽度，或使用 `width: max-content;` */
	width: max-content;
	max-width: 600px; /* 可选：设置最大宽度避免过宽 */
}

/* 学术风格导航栏 */
        .academic-navbar {
            background-color: white;
            border-bottom: 1px solid #e2e8f0;
            position: position;
            top: 0;
            z-index: 1000;
			margin-top:20px;
        }
        
        .nav-container {
            max-width: 1200px;
            margin: 0 auto 0 0;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .nav-brand {
            display: flex;
            align-items: center;
            padding: 15px 0 15px 10px;
            text-decoration: none;
            color: #1a365d;
        }
        
        .nav-brand i {
            font-size: 1.8rem;
            margin-right: 5px;
            color: #1a365d;
        }
        
        .nav-brand-text {
            font-size: 1.4rem;
            font-weight: 700;
            color: #1a365d;
			text-decoration: none;
        }
        
        .nav-brand-subtitle {
            font-size: 0.9rem;
            color: #718096;
            font-weight: 400;
            margin-left: 5px;
        }
        
        /* 导航菜单 */
        .nav-menu {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        
        .nav-item {
            position: relative;
        }
        
        .nav-link {
            display: flex;
            align-items: center;
            padding: 20px 25px;
            text-decoration: none;
            color: #4a5568;
            font-weight: 600;
            font-size: 1.05rem;
            transition: all 0.3s ease;
            border-bottom: 3px solid transparent;
            white-space: nowrap;
        }
        
        .nav-link i {
            margin-right: 10px;
            font-size: 1.1rem;
            color: #718096;
            transition: color 0.3s ease;
        }
        
        /* 默认状态 */
        .nav-link:hover {
            color: #1a365d;
            background-color: #f7fafc;
            border-bottom: 3px solid #cbd5e0;
			text-decoration: none;
        }
        
        .nav-link:hover i {
            color: #3182ce;
        }
        
        /* 当前选中状态 */
        .nav-item.active .nav-link {
            color: #1a365d;
            background-color: #edf2f7;
            border-bottom: 3px solid #3182ce;
			text-decoration: none;
        }
        
        .nav-item.active .nav-link i {
            color: #3182ce;
        }