/* 
 * 牛津中国论坛 (Oxford China Forum) 网站样式
 * 基于牛津红色调 (#c72323) 设计
 * 优化版排版与字体设计
 */

/* ===== 基础样式 ===== */
:root {
    /* 颜色变量 */
    --primary-color: #ba2121;     /* 牛津红 - 主色 */
    --primary-dark: #b81d1d;      /* 深红 - 悬停状态 */
    --primary-light: #e74c3c;     /* 亮红 - 强调 */
    --secondary-color: #f8f0e9;   /* 米白色 - 次要背景 */
    --text-dark: #333333;         /* 深灰 - 主要文字 */
    --text-light: #ffffff;        /* 白色 - 反色文字 */
    --text-muted: #777777;        /* 浅灰 - 次要文字 */
    --border-color: #c52626;      /* 边框色 */
    --bg-light: #ffffff;          /* 主背景色 */
    --bg-dark: #636363;           /* 深色背景 */
    --box-shadow: 0 4px 20px rgba(51, 51, 51, 0.183); /* 阴影效果 */
    
    /* 排版变量 */
    --heading-line-height: 1.4;
    --body-line-height: 1.8;
    --letter-spacing-tight: -0.02em;
    --letter-spacing-normal: 0;
    --letter-spacing-wide: 0.05em;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --paragraph-spacing: 1.8rem;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: 16px;
    font-weight: var(--font-weight-normal);
    line-height: var(--body-line-height);
    color: var(--text-dark);
    background-color: var(--bg-light);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Noto Serif SC', serif;
    margin-bottom: 1.2rem;
    line-height: var(--heading-line-height);
    font-weight: var(--font-weight-semibold);
    color: var(--text-dark);
    letter-spacing: var(--letter-spacing-tight);
}

h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 2.25rem;
    position: relative;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-medium);
}

h5 {
    font-size: 1.25rem;
    font-weight: var(--font-weight-medium);
}

h6 {
    font-size: 1rem;
    font-weight: var(--font-weight-bold);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
}

p {
    margin-bottom: var(--paragraph-spacing);
    font-size: 1.05rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.3s ease;
    border-bottom: 1px solid transparent;
}

a:hover {
    color: var(--primary-dark);
    border-bottom-color: var(--primary-dark);
}

.btn:hover {
    border-bottom-color: transparent;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* 新的标题样式 */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
    position: relative;
    padding-bottom: 1.5rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1.2rem;
    display: inline-block;
    position: relative;
}

.section-header h2:after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: var(--primary-color);
}

.section-header p {
    max-width: 700px;
    margin: 0 auto 1rem;
    font-size: 1.1rem;
    color: var(--text-muted);
}

.section-divider {
    display: none; /* 移除旧的分隔线，使用新的标题样式 */
}

section {
    padding: 6rem 0;
}

/* 美化段落和文本 */
.lead {
    font-size: 1.25rem;
    font-weight: var(--font-weight-light);
    line-height: 1.7;
    margin-bottom: 2rem;
}

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

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

.text-accent {
    color: var(--primary-color);
}

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

.text-small {
    font-size: 0.9rem;
}

/* ===== 按钮样式 ===== */
.btn {
    display: inline-block;
    padding: 0.9rem 2.2rem;
    border-radius: 4px;
    font-weight: var(--font-weight-medium);
    font-size: 1rem;
    cursor: pointer;
    text-align: center;
    transition: all 0.3s ease;
    text-decoration: none;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: 2px solid var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.center-button {
    text-align: center;
    margin-top: 3rem;
}

/* ===== 导航栏 ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--box-shadow);
    transition: all 0.3s ease;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    border-bottom: none;
}

.logo-img {
    height: 50px;
    width: auto;
    margin-right: 1rem;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-cn {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.4rem;
    font-weight: var(--font-weight-semibold);
    color: var(--primary-color);
    letter-spacing: var(--letter-spacing-tight);
}

.logo-en {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: var(--letter-spacing-wide);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
}

.main-nav ul {
    display: flex;
    list-style: none;
}

.main-nav ul li {
    margin-left: 2.5rem;
}

.main-nav ul li a {
    color: var(--text-dark);
    font-weight: var(--font-weight-medium);
    padding: 0.5rem 0;
    position: relative;
    font-size: 1.05rem;
    letter-spacing: var(--letter-spacing-tight);
    border-bottom: none;
}

.main-nav ul li a:after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    height: 2px;
    width: 0;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.main-nav ul li a:hover:after,
.main-nav ul li a.active:after {
    width: 100%;
}

.mobile-nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.mobile-nav-toggle span {
    display: block;
    height: 3px;
    width: 25px;
    background-color: var(--text-dark);
    margin-bottom: 4px;
    border-radius: 1px;
    transition: all 0.3s ease;
}

/* ===== 英雄区域 ===== */
.hero {
    padding: 11rem 0 7rem;
    background: linear-gradient(rgba(0, 0, 0, 0.215), rgba(0, 0, 0, 0.21)), url('../images/hero-bg.svg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--text-light);
    text-align: center;
}

.hero-content {
    max-width: 850px;
    margin: 0 auto;
}

.hero-title {
    font-size: 4rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    letter-spacing: var(--letter-spacing-tight);
    line-height: 1.2;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: 2.2rem;
    color: var(--text-light);
    margin-bottom: 1.8rem;
    font-weight: var(--font-weight-normal);
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.hero-description {
    font-size: 1.3rem;
    margin-bottom: 3rem;
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

/* ===== 页面标题区域 ===== */
.page-header {
    background: linear-gradient(rgba(0, 0, 0, 0.158), rgba(0, 0, 0, 0)), url('../images/page-header-bg.svg');
    background-size: cover;
    background-position: center;
    color: var(--text-light);
    padding: 9rem 0 5rem;
    text-align: center;
}

.page-header h1 {
    font-size: 3.5rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    letter-spacing: var(--letter-spacing-tight);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.breadcrumb {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
    font-size: 1.1rem;
    font-weight: var(--font-weight-medium);
    letter-spacing: var(--letter-spacing-wide);
}

.breadcrumb a {
    color: var(--text-light);
    text-decoration: none;
    border-bottom: 1px solid transparent;
}

.breadcrumb a:hover {
    border-bottom-color: var(--text-light);
}

/* 内容块样式 */
.content-block {
    margin-bottom: 4rem;
}

.content-block-title {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.8rem;
}

.content-block-title:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background-color: var(--primary-color);
}

.two-columns {
    display: flex;
    gap: 3rem;
    margin-bottom: 3rem;
}

.two-columns > div {
    flex: 1;
}

.card {
    background-color: var(--bg-light);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.card-img {
    width: 100%;
    height: 220px;
    overflow: hidden;
}

.card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.card:hover .card-img img {
    transform: scale(1.05);
}

.card-body {
    padding: 1.8rem;
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.card-text {
    margin-bottom: 1.5rem;
    color: #555;
}

.card-footer {
    padding: 1rem 1.8rem;
    background-color: rgba(0, 0, 0, 0.02);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* 引言和强调文本 */
.blockquote {
    margin: 2.5rem 0;
    padding: 2rem;
    background-color: var(--secondary-color);
    border-left: 4px solid var(--primary-color);
    border-radius: 0 4px 4px 0;
    font-style: italic;
}

.blockquote p {
    font-size: 1.2rem;
    line-height: 1.7;
    margin-bottom: 1rem;
}

.blockquote-footer {
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    color: var(--text-muted);
    font-style: normal;
}

.blockquote-footer:before {
    content: '—';
    margin-right: 0.5rem;
}

/* 列表样式 */
ul.feature-list {
    list-style: none;
    margin: 1.5rem 0;
    padding: 0;
}

ul.feature-list li {
    position: relative;
    padding-left: 2rem;
    margin-bottom: 1.2rem;
    line-height: 1.6;
}

ul.feature-list li:before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--primary-color);
    font-weight: var(--font-weight-bold);
}

/* ===== 关于页面样式 ===== */
.about-section {
    background-color: var(--bg-light);
    padding: 6rem 0;
}

.about-intro {
    display: flex;
    gap: 5rem;
    margin-bottom: 5rem;
    align-items: center;
}

.about-image {
    flex: 1;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    position: relative;
}

.about-image:after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: linear-gradient(to bottom right, rgba(199, 35, 35, 0), rgba(0, 0, 0, 0));
    z-index: 1;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.about-image:hover img {
    transform: scale(1.05);
}

.about-text {
    flex: 1;
}

.about-text h2 {
    margin-bottom: 2rem;
    position: relative;
    display: inline-block;
    font-size: 2.5rem;
}

.about-text h2:after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: var(--primary-color);
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.8rem;
}

.read-more {
    font-weight: var(--font-weight-medium);
    display: inline-flex;
    align-items: center;
    border-bottom: none;
    transition: transform 0.3s ease;
}

.read-more:hover {
    transform: translateX(5px);
}

.arrow {
    margin-left: 0.5rem;
    transition: transform 0.3s ease;
}

.read-more:hover .arrow {
    transform: translateX(3px);
}

.mission-vision {
    display: flex;
    gap: 4rem;
    margin-bottom: 5rem;
}

.mission, .vision {
    flex: 1;
    background-color: var(--secondary-color);
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.mission:hover, .vision:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.mission h2, .vision h2 {
    margin-bottom: 1.8rem;
    position: relative;
    display: inline-block;
    font-size: 2rem;
}

.mission h2:after, .vision h2:after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50px;
    height: 3px;
    background-color: var(--primary-color);
}

.mission p, .vision p {
    font-size: 1.05rem;
    line-height: 1.7;
}

.mission ul {
    padding-left: 1.5rem;
    margin-top: 1.5rem;
}

.mission ul li {
    margin-bottom: 1.2rem;
    position: relative;
    line-height: 1.6;
}

/* ===== 团队部分样式 ===== */
.team-section {
    margin-bottom: 4rem;
}

.team-section h2 {
    margin-bottom: 1.5rem;
    position: relative;
    display: inline-block;
}

.team-section h2:after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--primary-color);
}

.team-intro {
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.team-structure {
    margin-bottom: 3rem;
}

.org-chart {
    margin-top: 2rem;
}

.org-level {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    position: relative;
}

.org-level:not(:last-child):after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 20px;
    background-color: var(--border-color);
}

.org-position {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 2rem;
    border-radius: 4px;
    text-align: center;
    font-weight: 500;
    box-shadow: var(--box-shadow);
}

.join-us {
    background-color: var(--secondary-color);
    padding: 2rem;
    border-radius: 6px;
    text-align: center;
}

.join-us h3 {
    margin-bottom: 1rem;
}

.join-us p {
    margin-bottom: 1.5rem;
}

/* ===== 合作伙伴展示 ===== */
.partners-showcase {
    background-color: var(--secondary-color);
    padding: 5rem 0;
}

.partners-categories {
    margin-bottom: 3rem;
}

.partner-category {
    margin-bottom: 3rem;
}

.partner-category h3 {
    margin-bottom: 1.5rem;
    text-align: center;
}

.partners-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 3rem;
}

.partner-item {
    text-align: center;
    transition: transform 0.3s ease;
}

.partner-item:hover {
    transform: translateY(-10px);
}

.partner-item img {
    height: 80px;
    margin-bottom: 1rem;
}

.partner-item span {
    display: block;
    font-weight: 500;
}

.partner-contact {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 6px;
    text-align: center;
    box-shadow: var(--box-shadow);
}

.partner-contact h3 {
    margin-bottom: 1rem;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1199px) {
    .hero-title {
        font-size: 3.5rem;
    }
    
    .hero-subtitle {
        font-size: 2rem;
    }
    
    .page-header h1 {
        font-size: 3rem;
    }
    
    .section-header h2,
    .about-text h2,
    .history-intro h2 {
        font-size: 2.2rem;
    }
    
    .timeline-year {
        flex: 0 0 100px;
        height: 100px;
        font-size: 1.8rem;
        margin-right: 2.5rem;
    }
}

@media (max-width: 992px) {
    h1 {
        font-size: 2.8rem;
    }
    
    h2 {
        font-size: 2.2rem;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-subtitle {
        font-size: 1.8rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .page-header h1 {
        font-size: 2.8rem;
    }
    
    .section-header h2,
    .about-text h2,
    .history-intro h2 {
        font-size: 2rem;
    }
    
    .about-intro,
    .mission-vision,
    .two-columns {
        flex-direction: column;
        gap: 3rem;
    }
    
    .about-image {
        order: -1;
        max-height: 400px;
    }
    
    .contact-content,
    .contact-wrapper {
        flex-direction: column;
        gap: 2rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 3rem;
    }
    
    .footer-links {
        flex-wrap: wrap;
        gap: 2.5rem;
    }
    
    .timeline-year {
        flex: 0 0 90px;
        height: 90px;
        font-size: 1.6rem;
        margin-right: 2rem;
    }
    
    .timeline-content h3 {
        font-size: 1.6rem;
        padding: 1.5rem;
    }
    
    .timeline-image {
        height: 250px;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 95%;
    }
    
    section {
        padding: 4rem 0;
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .hero {
        padding: 8rem 0 5rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.5rem;
        margin-bottom: 1.2rem;
    }
    
    .hero-description {
        font-size: 1.05rem;
        margin-bottom: 2rem;
    }
    
    .page-header {
        padding: 7rem 0 3.5rem;
    }
    
    .page-header h1 {
        font-size: 2.5rem;
    }
    
    .mobile-nav-toggle {
        display: flex;
    }
    
    .main-nav {
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background-color: white;
        box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
        padding: 1.5rem;
        transform: translateY(-150%);
        opacity: 0;
        transition: all 0.4s ease;
        z-index: -1;
    }
    
    .main-nav.active {
        transform: translateY(0);
        opacity: 1;
        z-index: 100;
    }
    
    .main-nav ul {
        flex-direction: column;
    }
    
    .main-nav ul li {
        margin: 0 0 1.2rem 0;
    }
    
    .main-nav ul li:last-child {
        margin-bottom: 0;
    }
    
    .main-nav ul li a {
        font-size: 1.1rem;
        display: block;
        padding: 0.5rem 0;
    }
    
    .timeline-event {
        flex-direction: column;
    }
    
    .timeline-year {
        margin-bottom: 1.8rem;
        margin-right: 0;
        align-self: center;
    }
    
    .timeline-content h3 {
        font-size: 1.5rem;
    }
    
    .timeline-image {
        height: 220px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 2.5rem;
    }
    
    .content-block-title {
        font-size: 1.8rem;
    }
    
    .blockquote p {
        font-size: 1.1rem;
    }
}

@media (max-width: 576px) {
    html {
        font-size: 90%;
    }
    
    h1 {
        font-size: 2.2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-buttons,
    .event-actions {
        flex-direction: column;
        gap: 1rem;
    }
    
    .page-header h1 {
        font-size: 2.2rem;
    }
    
    .breadcrumb {
        font-size: 0.95rem;
        padding: 0.6rem 1rem;
    }
    
    .section-header {
        margin-bottom: 3rem;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .timeline-content h3 {
        font-size: 1.3rem;
        padding: 1.2rem;
    }
    
    .timeline-image {
        height: 200px;
    }
    
    .timeline-text {
        padding: 1.5rem;
    }
    
    .event-info {
        flex-direction: column;
        gap: 1.2rem;
    }
    
    .newsletter-form-large {
        flex-direction: column;
        gap: 1rem;
    }
    
    .footer {
        padding: 3.5rem 0 2rem;
    }
    
    .card-body {
        padding: 1.2rem;
    }
    
    .card-footer {
        padding: 1rem 1.2rem;
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
}

/* ===== 历届回顾页面样式 ===== */
.history-timeline {
    padding: 6rem 0;
    background-color: var(--bg-light);
}

.history-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 5rem;
}

.history-intro h2 {
    margin-bottom: 2rem;
    position: relative;
    display: inline-block;
    font-size: 2.5rem;
}

.history-intro h2:after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--primary-color);
}

.history-intro p {
    font-size: 1.15rem;
    line-height: 1.8;
}

.timeline-full {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.timeline-event {
    display: flex;
    margin-bottom: 5rem;
    position: relative;
}

.timeline-year {
    flex: 0 0 120px;
    background-color: var(--primary-color);
    color: white;
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    height: 120px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 3rem;
    box-shadow: var(--box-shadow);
    z-index: 2;
    transition: transform 0.3s ease;
}

.timeline-event:hover .timeline-year {
    transform: scale(1.05) rotate(5deg);
}

.timeline-content {
    flex: 1;
    background-color: var(--bg-light);
    border-radius: 10px;
    box-shadow: var(--box-shadow);
    padding: 0;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-event:hover .timeline-content {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.timeline-content h3 {
    background-color: var(--secondary-color);
    padding: 1.8rem;
    margin: 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 1.8rem;
    letter-spacing: var(--letter-spacing-tight);
}

.timeline-details {
    display: flex;
    flex-direction: column;
}

.timeline-image {
    width: 100%;
    height: 300px;
    overflow: hidden;
}

.timeline-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s ease;
}

.timeline-content:hover .timeline-image img {
    transform: scale(1.08);
}

.timeline-text {
    padding: 2rem;
    font-size: 1.05rem;
    line-height: 1.7;
}

.event-info {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin: 1.5rem 0;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.info-item {
    display: flex;
    flex-direction: column;
}

.info-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
}

.info-value {
    font-weight: var(--font-weight-semibold);
    font-size: 1.1rem;
}

.event-actions {
    display: flex;
    gap: 1.2rem;
    margin-top: 2rem;
}

.btn-sm {
    padding: 0.6rem 1.3rem;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
}

/* ===== 联系页面样式 ===== */
.contact-page {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

.contact-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem;
}

.contact-intro h2 {
    margin-bottom: 1.5rem;
    position: relative;
    display: inline-block;
}

.contact-intro h2:after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background-color: var(--primary-color);
}

.contact-content {
    display: flex;
    gap: 3rem;
    margin-bottom: 4rem;
}

.contact-info-block,
.contact-form-block {
    flex: 1;
    background-color: var(--bg-light);
    border-radius: 8px;
    box-shadow: var(--box-shadow);
    padding: 2rem;
}

.contact-info-block h3,
.contact-form-block h3 {
    margin-bottom: 1.5rem;
    position: relative;
    display: inline-block;
}

.contact-info-block h3:after,
.contact-form-block h3:after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--primary-color);
}

.contact-list {
    list-style: none;
    margin-top: 2rem;
}

.contact-list li {
    display: flex;
    margin-bottom: 2rem;
}

.contact-icon {
    flex: 0 0 50px;
    height: 50px;
    background-color: var(--secondary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-right: 1rem;
    color: var(--primary-color);
}

.contact-detail {
    flex: 1;
}

.contact-detail h4 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
}

.social-icon {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--secondary-color);
    color: var(--primary-color);
    border-radius: 4px;
    transition: all 0.3s ease;
}

.social-icon:hover {
    background-color: var(--primary-color);
    color: white;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* 表单错误和成功消息样式 */
.form-group input.error,
.form-group textarea.error {
    border-color: #f44336;
}

.error-message {
    color: #f44336;
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

.success-message {
    background-color: #e8f5e9;
    color: #2e7d32;
    padding: 1rem;
    border-radius: 4px;
    margin-top: 1rem;
    font-weight: 500;
    text-align: center;
}

/* FAQ 部分样式 */
.faq-section {
    background-color: var(--secondary-color);
    padding: 5rem 0;
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--bg-light);
    border-radius: 8px;
    margin-bottom: 1.5rem;
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

.faq-question {
    padding: 1.5rem;
    font-weight: 600;
    cursor: pointer;
    position: relative;
    transition: background-color 0.3s ease;
}

.faq-question:after {
    content: '+';
    position: absolute;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.faq-question.active {
    background-color: var(--primary-color);
    color: white;
}

.faq-question.active:after {
    content: '−';
    transform: translateY(-50%) rotate(180deg);
}

.faq-answer {
    padding: 0 1.5rem 1.5rem;
    display: none;
}

/* 通讯订阅部分 */
.newsletter-section {
    background-color: var(--bg-light);
    padding: 5rem 0;
    text-align: center;
}

.newsletter-content {
    max-width: 700px;
    margin: 0 auto;
}

.newsletter-content h2 {
    margin-bottom: 1rem;
}

.newsletter-content p {
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.newsletter-form-large {
    display: flex;
    gap: 1rem;
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-form-large input {
    flex: 1;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
}

.newsletter-form-large input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .contact-content {
        flex-direction: column;
    }
    
    .newsletter-form-large {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    /* ... existing code ... */
}

@media (max-width: 576px) {
    /* ... existing code ... */
}

/* ===== 页脚样式 ===== */
.footer {
    background-color: var(--bg-dark);
    color: var(--text-light);
    padding: 5rem 0 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-logo {
    flex: 1;
}

.footer-logo img {
    height: 60px;
    margin-bottom: 1.5rem;
}

.footer-logo p {
    font-size: 1rem;
    margin-bottom: 1.5rem;
    opacity: 0.8;
}

.footer-links {
    flex: 2;
    display: flex;
    gap: 4rem;
}

.footer-links-group {
    flex: 1;
}

.footer-links-group h4 {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
    position: relative;
    padding-bottom: 0.8rem;
    font-weight: var(--font-weight-medium);
}

.footer-links-group h4:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--primary-color);
}

.footer-links-group ul {
    list-style: none;
}

.footer-links-group ul li {
    margin-bottom: 1rem;
}

.footer-links-group ul li a {
    color: var(--text-light);
    opacity: 0.8;
    transition: all 0.3s ease;
    border-bottom: none;
    font-size: 1.05rem;
}

.footer-links-group ul li a:hover {
    opacity: 1;
    color: var(--text-light);
    padding-left: 5px;
}

.copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
}

.social-icons {
    display: flex;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--text-light);
    font-size: 1.2rem;
    transition: all 0.3s ease;
    border-bottom: none;
}

.social-icon:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

/* 磨砂玻璃效果通用类 */
.glass-effect {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.glass-effect-dark {
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

/* 修改辉煌历程部分 */
.history {
    background: linear-gradient(135deg, #f8f0e9 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.history:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/hero-bg.svg') center/cover no-repeat fixed;
    opacity: 0.1;
    z-index: 0;
}

.history .container {
    position: relative;
    z-index: 1;
}

.timeline-item {
    margin-bottom: 2.5rem;
}

.timeline-content {
    display: flex;
    align-items: center;
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.timeline-content:hover {
    transform: translateY(-5px);
}

.timeline-content .year {
    flex: 0 0 120px;
    background-color: var(--primary-color);
    color: white;
    font-size: 1.8rem;
    font-weight: var(--font-weight-bold);
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.timeline-content .year:after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: inherit;
    filter: blur(8px);
    opacity: 0.7;
    z-index: -1;
}

.timeline-content .content {
    flex: 1;
    padding: 1.5rem 2rem;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.timeline-content h3 {
    margin-bottom: 0.75rem;
}

.timeline-content p {
    margin-bottom: 0;
    color: var(--text-dark);
    opacity: 0.85;
}

.view-all {
    display: inline-flex;
    align-items: center;
    margin-top: 1.5rem;
    font-weight: var(--font-weight-medium);
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.view-all:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateX(5px);
}

.view-all .arrow {
    transition: transform 0.3s ease;
}

.view-all:hover .arrow {
    transform: translateX(3px);
}

/* 修改历届嘉宾部分 */
.speakers {
    background: linear-gradient(135deg, #f1f1f1 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.speakers:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/hero-bg.svg') center/cover no-repeat fixed;
    opacity: 0.05;
    z-index: 0;
}

.speakers .container {
    position: relative;
    z-index: 1;
}

.speakers-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
    margin-bottom: 3rem;
}

.speaker-card {
    border-radius: 16px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.speaker-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    background: rgba(255, 255, 255, 0.9);
}

.speaker-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
    position: relative;
}

.speaker-image:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 40%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.5), transparent);
    z-index: 1;
}

.speaker-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.speaker-card:hover .speaker-image img {
    transform: scale(1.1);
}

.speaker-card h3 {
    margin: 1.2rem 1.5rem 0.5rem;
    font-size: 1.35rem;
}

.speaker-card p {
    margin: 0 0.8rem 1.5rem;
    color: var(--text-muted);
    font-size: 1rem;
}

/* 修改合作伙伴部分 */
.partners {
    background: linear-gradient(135deg, #ffffff 0%, #f8f0e9 100%);
    position: relative;
    overflow: hidden;
}

.partners:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/hero-bg.svg') center/cover no-repeat fixed;
    opacity: 0.03;
    z-index: 0;
}

.partners .container {
    position: relative;
    z-index: 1;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
    margin: 0 auto;
    max-width: 1000px;
}

.partner-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 150px;
    padding: 1.5rem;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.partner-logo:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    background: rgba(255, 255, 255, 0.9);
}

.partner-logo img {
    max-height: 80px;
    width: auto;
    max-width: 90%;
    filter: grayscale(60%);
    transition: all 0.3s ease;
}

.partner-logo:hover img {
    filter: grayscale(0%);
}

/* 响应式设计调整 */
@media (max-width: 992px) {
    .speakers-grid,
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .timeline-content {
        flex-direction: column;
    }
    
    .timeline-content .year {
        width: 100%;
        height: 80px;
        flex: none;
    }
    
    .timeline-content .content {
        width: 100%;
    }
}

@media (max-width: 576px) {
    .speakers-grid,
    .partners-grid {
        grid-template-columns: 1fr;
    }
}

/* 嘉宾页面样式 */
.speakers-page {
    padding: 5rem 0;
}

.section-intro {
    max-width: 800px;
    margin: 0 auto 3rem;
    text-align: center;
}

.section-intro h2 {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.section-intro p {
    font-size: 1.1rem;
    line-height: 1.7;
}

.speakers-filter {
    margin-bottom: 3rem;
    display: flex;
    justify-content: center;
}

.filter-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.filter-label {
    font-weight: 500;
    margin-right: 0.5rem;
}

.filter-btn {
    background: rgba(216, 216, 216, 0.8);
    border: 1px solid rgba(var(--primary-rgb), 0.3);
    border-radius: 20px;
    padding: 0.5rem 1.2rem;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover, .filter-btn.active {
    background: rgb(174, 22, 22);
    color: rgb(255, 255, 255);
}

.speakers-grid.large-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.speaker-card {
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
    height: 100%;
}

.speaker-card.glass-effect {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.speaker-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.speaker-image {
    position: relative;
    aspect-ratio: 1 / 1;
    overflow: hidden;
}

.speaker-image::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 30%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.5), transparent);
}

.speaker-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all 0.5s ease;
}

.speaker-card:hover .speaker-image img {
    transform: scale(1.05);
}

.speaker-info {
    padding: 1.5rem;
    text-align: left;
}

.speaker-info h3 {
    margin: 0 0 0.5rem;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary);
    text-align: left;
    padding-left: 0.5rem;
    border-left: 3px solid var(--primary-color);
}

.speaker-title {
    margin: 0 0 1rem;
    font-size: 0.95rem;
    color: #555;
    line-height: 1.5;
    text-align: left;
    padding-left: 0.001rem;
}

.speaker-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background: rgba(var(--primary-rgb), 0.1);
    color: var(--primary);
    font-size: 0.8rem;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    display: inline-block;
    border: 1px solid rgba(var(--primary-rgb), 0.3);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.tag:hover {
    background: rgba(var(--primary-rgb), 0.15);
    border-color: rgba(var(--primary-rgb), 0.5);
    transform: translateY(-2px);
}

/* 响应式调整 */
@media (max-width: 992px) {
    .speakers-grid.large-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .speakers-grid.large-grid {
        grid-template-columns: 1fr;
        max-width: 450px;
        margin: 0 auto;
    }
}