/* ========================================
   SISEE 2026 - 上海国际智能眼镜展览会
   全局样式表 (完全对齐React版Tailwind CSS颜色系统)
   ======================================== */

/* ===== Tailwind CSS 颜色变量 ===== */
:root {
    /* Slate - 主要文字和背景色 */
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;
    
    /* Blue - 主色 */
    --blue-50: #eff6ff;
    --blue-100: #dbeafe;
    --blue-200: #bfdbfe;
    --blue-300: #93c5fd;
    --blue-400: #60a5fa;
    --blue-500: #3b82f6;
    --blue-600: #2563eb;
    --blue-700: #1d4ed8;
    --blue-800: #1e40af;
    --blue-900: #1e3a8a;
    
    /* Purple - 辅助色 */
    --purple-50: #faf5ff;
    --purple-100: #f3e8ff;
    --purple-200: #e9d5ff;
    --purple-300: #d8b4fe;
    --purple-400: #c084fc;
    --purple-500: #a855f7;
    --purple-600: #9333ea;
    --purple-700: #7e22ce;
    --purple-800: #6b21a8;
    --purple-900: #581c87;
    
    /* Indigo */
    --indigo-50: #eef2ff;
    --indigo-100: #e0e7ff;
    --indigo-200: #c7d2fe;
    --indigo-300: #a5b4fc;
    --indigo-400: #818cf8;
    --indigo-500: #6366f1;
    --indigo-600: #4f46e5;
    --indigo-700: #4338ca;
    --indigo-800: #3730a3;
    --indigo-900: #312e81;
    
    /* Pink */
    --pink-50: #fdf2f8;
    --pink-100: #fce7f3;
    --pink-200: #fbcfe8;
    --pink-300: #f9a8d4;
    --pink-400: #f472b6;
    --pink-500: #ec4899;
    --pink-600: #db2777;
    --pink-700: #be185d;
    --pink-800: #9d174d;
    --pink-900: #831843;
    
    /* Green - 成功状态 */
    --green-50: #f0fdf4;
    --green-100: #dcfce7;
    --green-200: #bbf7d0;
    --green-300: #86efac;
    --green-400: #4ade80;
    --green-500: #22c55e;
    --green-600: #16a34a;
    --green-700: #15803d;
    --green-800: #166534;
    --green-900: #14532d;
}

/* ===== 全局重置和基础样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background-color: var(--slate-50);
    color: var(--slate-900);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    width: 100%;
    max-width: 100vw;
}

/* ===== 容器和布局 ===== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
    width: 100%;
    box-sizing: border-box;
}

.section {
    padding: 5rem 1rem;
}

.section-light {
    background-color: #ffffff;
}

.section-dark {
    background-color: var(--slate-50);
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
    padding: 1rem 0;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(8px);
    overflow: visible; /* 允许下拉菜单溢出 */
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 0.5rem 0;
}

.navbar-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 64px;
    overflow: visible; /* 允许下拉菜单溢出 */
}

/* Logo 区域 */
.navbar-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.navbar-logo:hover {
    opacity: 0.8;
}

.logo-icon {
    width: 32px;
    height: 32px;
    padding: 0.5rem;
    border-radius: 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.navbar.scrolled .logo-icon {
    background: var(--blue-600);
    color: white;
}

/* Logo 图片样式 */
.logo-image {
    width: 32px;
    height: 32px;
    object-fit: contain;
    display: block;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.05em;
    color: white;
    transition: color 0.3s ease;
}

.navbar.scrolled .logo-text {
    color: var(--slate-900);
}

.logo-year {
    font-weight: 300;
}

/* 导航链接 */
.navbar-menu {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    list-style: none;
    overflow: visible; /* 允许下拉菜单溢出 */
}

.navbar-menu li {
    list-style: none;
}

.navbar-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--slate-200);
    text-decoration: none;
    transition: color 0.3s ease;
    cursor: pointer;
}

.navbar-link:hover,
.navbar-link.active {
    color: var(--blue-500);
}

.navbar.scrolled .navbar-link {
    color: var(--slate-600);
}

.navbar.scrolled .navbar-link:hover,
.navbar.scrolled .navbar-link.active {
    color: var(--blue-500);
}

/* 语言选择器 */
.language-selector {
    position: relative;
    /* 确保下拉菜单可以溢出 */
    overflow: visible;
}

.language-button {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--slate-200);
    background: none;
    border: none;
    cursor: pointer;
    transition: color 0.3s ease;
    padding: 0.5rem;
}

.navbar.scrolled .language-button {
    color: var(--slate-700);
}

.language-button:hover {
    color: var(--blue-500);
}

.language-dropdown {
    position: absolute;
    right: 0;
    top: 100%;
    margin-top: 0.5rem;
    min-width: 128px;
    background: white;
    border-radius: 0.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    border: 1px solid var(--slate-100);
    overflow: hidden;
    display: none;
    z-index: 9999; /* 确保显示在最上层 */
}

.language-dropdown.show {
    display: block;
}

.language-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    color: var(--slate-700);
    background: white;
    border: none;
    text-align: left;
    cursor: pointer;
    transition: background 0.2s ease;
    text-decoration: none;
}

.language-option:hover {
    background: var(--slate-100);
}

.language-option.active {
    color: var(--blue-600);
    font-weight: 700;
}

/* 语言国旗图标 */
.language-flag {
    width: 20px;
    height: 15px;
    object-fit: cover;
    border-radius: 2px;
    border: 1px solid var(--slate-200);
}

/* 注册按钮 */
.navbar-cta {
    padding: 0.625rem 1.25rem;
    border-radius: 9999px;
    background: var(--blue-600);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(37, 99, 235, 0.25);
    white-space: nowrap;
}

.navbar-cta:hover {
    background: var(--blue-700);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(37, 99, 235, 0.35);
}

/* 移动端菜单按钮 */
.mobile-menu-button {
    display: none;
    padding: 0.5rem;
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    font-size: 1.5rem;
    min-width: 44px;
    min-height: 44px;
}

.navbar.scrolled .mobile-menu-button {
    color: var(--slate-900);
}

/* 移动端操作按钮组 */
.navbar-mobile-actions {
    display: none;
    align-items: center;
    gap: 0.5rem;
    position: relative; /* 为下拉菜单提供定位上下文 */
    overflow: visible; /* 确保下拉菜单可见 */
}

/* 移动端语言切换按钮 */
.language-button-mobile {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--slate-200);
    background: none;
    border: none;
    cursor: pointer;
    transition: color 0.3s ease;
    padding: 0.5rem;
    min-width: 44px;
    min-height: 44px;
}

.navbar.scrolled .language-button-mobile {
    color: var(--slate-700);
}

.language-button-mobile:hover {
    color: var(--blue-500);
}

/* 桌面端/移动端显示控制 */
.mobile-only {
    display: none;
}

.desktop-only {
    display: block;
}

/* ===== Hero 区域样式 ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--slate-900);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    filter: brightness(0.4);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    z-index: 1;
    background: linear-gradient(to top right, rgba(30, 58, 138, 0.8), transparent, rgba(88, 28, 135, 0.8));
    mix-blend-mode: overlay;
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: 2rem 1rem;
    max-width: 1280px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--blue-200);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease;
}

.pulse-dot {
    position: relative;
    width: 8px;
    height: 8px;
}

.pulse-dot::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: var(--blue-400);
    animation: ping 1.5s cubic-bezier(0, 0, 0.2, 1) infinite;
}

.pulse-dot::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: var(--blue-500);
}

@keyframes ping {
    75%, 100% {
        transform: scale(2);
        opacity: 0;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-size: clamp(2rem, 7vw, 4.5rem);
    font-weight: 700;
    color: white;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
    line-height: 1.1;
}

.gradient-text {
    background: linear-gradient(to right, #60a5fa, #818cf8, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    max-width: 56rem;
    margin: 0 auto 1.5rem;
    font-size: clamp(1.25rem, 3vw, 1.875rem);
    font-weight: 600;
    color: white;
    line-height: 1.5;
    letter-spacing: 0.01em;
}

.hero-description {
    max-width: 42rem;
    margin: 0 auto 2.5rem;
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--slate-300);
    font-weight: 300;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 4rem;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 9999px;
    background: linear-gradient(to right, #2563eb, #7c3aed);
    color: white;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 8px 16px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(to right, #1d4ed8, #6d28d9);
    box-shadow: 0 12px 24px rgba(37, 99, 235, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    padding: 1rem 2rem;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

.hero-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 48rem;
    margin: 0 auto;
}

.info-card {
    padding: 1rem;
    border-radius: 0.75rem;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(8px);
    border-left: 4px solid;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.info-card.blue {
    border-left-color: var(--blue-400);
}

.info-card.purple {
    border-left-color: var(--purple-400);
}

.info-icon {
    padding: 0.75rem;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.info-icon.blue {
    background: rgba(96, 165, 250, 0.2);
    color: var(--blue-300);
}

.info-icon.purple {
    background: rgba(167, 139, 250, 0.2);
    color: var(--purple-300);
}

.info-label {
    font-size: 0.75rem;
    color: var(--slate-400);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.info-value {
    color: white;
    font-weight: 500;
}

/* ===== 统计数据条 ===== */
.stats-bar {
    position: relative;
    z-index: 10;
    background: white;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid #e2e8f0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    padding: 3rem 1rem;
    gap: 2rem;
    text-align: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0 1rem;
    gap: 0.5rem;
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: scale(1.1);
}

.stat-number {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 900;
    letter-spacing: -0.05em;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: clamp(0.75rem, 1.5vw, 0.875rem);
    font-weight: 700;
    color: var(--slate-500);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ===== Section 标题样式 ===== */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: clamp(1.875rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.section-subtitle {
    max-width: 42rem;
    margin: 0 auto;
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--slate-500);
    font-weight: 300;
}

.section-divider {
    width: 96px;
    height: 4px;
    background: linear-gradient(to right, #2563eb, #7c3aed);
    margin: 1.5rem auto 0;
    border-radius: 9999px;
}

/* ===== 卡片样式 ===== */
.card {
    background: white;
    border-radius: 1rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    transform: translateY(-4px);
}

/* ===== 网格布局 ===== */
.grid {
    display: grid;
    gap: 2rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

/* ===== 图标样式 ===== */
.icon-box {
    padding: 0.75rem;
    border-radius: 0.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.icon-box.blue {
    background: var(--blue-100);
    color: var(--blue-600);
}

.icon-box.purple {
    background: var(--purple-100);
    color: var(--purple-600);
}

.icon-box.indigo {
    background: var(--indigo-100);
    color: var(--indigo-600);
}

.icon-box.pink {
    background: var(--pink-100);
    color: var(--pink-600);
}

/* ===== 按钮样式 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 2rem;
    border-radius: 9999px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-dark {
    background: var(--slate-900);
    color: white;
}

.btn-dark:hover {
    background: var(--slate-800);
}

.btn-blue {
    background: var(--blue-600);
    color: white;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-blue:hover {
    background: var(--blue-700);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--slate-900);
    border: 2px solid #cbd5e1;
}

.btn-outline:hover {
    background: #f1f5f9;
}

/* ===== Footer 样式 ===== */
.footer {
    background: var(--slate-900);
    color: var(--slate-300);
    padding: 5rem 1rem 2.5rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.footer-logo-icon {
    width: 32px;
    height: 32px;
    color: #60a5fa;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Footer Logo 图片样式 */
.footer-logo-image {
    width: 32px;
    height: 32px;
    object-fit: contain;
    display: block;
}

.footer-logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    letter-spacing: -0.05em;
}

.footer-description {
    color: var(--slate-400);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

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

.social-link {
    color: var(--slate-300);
    transition: color 0.3s ease;
}

.social-link:hover {
    color: #60a5fa;
}

.footer-title {
    color: white;
    font-weight: 600;
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

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

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-link {
    color: var(--slate-300);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: #60a5fa;
}

.footer-contact {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.footer-contact-icon {
    color: #60a5fa;
    flex-shrink: 0;
    margin-top: 2px;
}

.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.newsletter-input {
    background: var(--slate-800);
    border: 1px solid #334155;
    border-radius: 0.5rem;
    padding: 0.5rem 1rem;
    color: white;
    font-size: 0.875rem;
    outline: none;
    transition: border-color 0.3s ease;
}

.newsletter-input:focus {
    border-color: #60a5fa;
}

.newsletter-button {
    background: var(--blue-600);
    color: white;
    border: none;
    border-radius: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.3s ease;
}

.newsletter-button:hover {
    background: var(--blue-700);
}

.newsletter-button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 2rem;
    text-align: center;
    font-size: 0.75rem;
    color: var(--slate-500);
}

.footer-bottom a {
    color: var(--slate-500);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-bottom a:hover {
    color: var(--slate-400);
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    /* 隐藏桌面端菜单，显示移动端按钮组 */
    .navbar-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        align-items: stretch;
        padding: 0;
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        transition: all 0.3s ease;
        gap: 0;
        z-index: 999;
    }
    
    .navbar.scrolled .navbar-menu {
        top: 64px;
    }
    
    .navbar-menu.show {
        max-height: 600px;
        opacity: 1;
        padding: 1rem 0;
    }
    
    .navbar-menu li {
        width: 100%;
        border-bottom: 1px solid var(--slate-100);
    }
    
    .navbar-menu li:last-child {
        border-bottom: none;
    }
    
    .navbar-link {
        display: block;
        padding: 1rem 1.5rem;
        color: var(--slate-700);
        font-size: 1rem;
    }
    
    .navbar-link:hover,
    .navbar-link.active {
        color: var(--blue-600);
        background: var(--slate-50);
    }
    
    /* 移动端观众注册按钮优化 */
    .navbar-cta {
        display: block;
        margin: 1rem 1.5rem 0.5rem;
        padding: 0.875rem 1.5rem;
        text-align: center;
        border-radius: 0.5rem;
        background: linear-gradient(135deg, var(--blue-600), var(--purple-600));
        color: white;
        font-weight: 600;
        box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        transition: all 0.3s ease;
    }
    
    .navbar-cta:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4);
    }
    
    /* 隐藏桌面端元素 */
    .desktop-only {
        display: none !important;
    }
    
    /* 显示移动端元素 */
    .mobile-only {
        display: block;
    }
    
    .navbar-mobile-actions {
        display: flex;
    }
    
    .mobile-menu-button {
        display: block;
    }
    
    /* 移动端语言选择器样式 */
    .mobile-only.language-selector {
        position: relative;
        overflow: visible; /* 允许下拉菜单溢出 */
    }
    
    .mobile-only .language-dropdown {
        position: absolute;
        right: 0;
        top: 100%;
        margin-top: 0.5rem;
        min-width: 150px; /* 移动端加宽 */
        z-index: 9999; /* 确保显示在最上层 */
    }
    
    .section {
        padding: 3rem 1rem;
    }
    
    /* Hero 区域移动端优化 */
    .hero {
        min-height: auto;
        padding: 6rem 0 4rem;
    }
    
    .hero-content {
        padding: 2rem 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
        line-height: 1.2;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
        line-height: 1.4;
        padding: 0 0.5rem;
    }
    
    .hero-description {
        font-size: 1rem;
        padding: 0 0.5rem;
    }
    
    .hero-info-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    /* 统计数据条移动端优化 - 2行2列 */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
        padding: 2rem 1rem;
    }
    
    .stat-item {
        padding: 1rem 0.5rem;
    }
    
    .stat-number {
        font-size: 1.75rem;
    }
    
    .stat-label {
        font-size: 0.75rem;
    }
    
    .section-title {
        font-size: 2rem;
        line-height: 1.3;
        padding: 0 0.5rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
        line-height: 1.6;
        padding: 0 0.5rem;
    }
}

@media (max-width: 768px) {
    .navbar-container {
        padding: 0 1rem;
    }
    
    /* Hero区域进一步优化 */
    .hero {
        min-height: auto;
        padding: 5rem 0 3rem;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-description {
        font-size: 0.9375rem;
    }
    
    .hero-badge {
        font-size: 0.8125rem;
        padding: 0.375rem 0.875rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        padding: 0 1rem;
        gap: 0.75rem;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        justify-content: center;
        padding: 0.875rem 1.5rem;
    }
    
    /* section内容优化 */
    .section {
        padding: 2.5rem 1rem;
    }
    
    .section-header {
        margin-bottom: 2.5rem;
    }
    
    /* 统计数据条 - 2行2列 */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        padding: 2rem 1rem;
        gap: 1.5rem;
    }
    
    .stat-item {
        padding: 0.75rem;
    }
    
    /* 网格布局优化 */
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    /* 卡片间距优化 */
    .card {
        margin-bottom: 1rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    /* 移动端文字优化，避免遮挡 */
    h1, h2, h3, h4, h5, h6 {
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
    
    p {
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .section-subtitle {
        font-size: 0.9375rem;
    }
    
    /* 图片自适应 */
    img {
        max-width: 100%;
        height: auto;
    }
    
    /* 轮播移动端优化 */
    .carousel-container {
        margin-bottom: 1rem;
    }
    
    /* 新闻卡片移动端优化 */
    .news-image {
        height: 10rem;
    }
    
    .news-content {
        padding: 1.25rem;
    }
    
    .news-title {
        font-size: 1.125rem;
    }
    
    /* 新闻详情页移动端优化 */
    .news-detail-hero {
        height: 20rem;
    }
    
    .news-detail-hero-content {
        padding: 2rem 0 1.5rem;
    }
    
    .news-detail-title {
        font-size: 1.75rem;
    }
    
    .news-detail-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .news-detail-content {
        padding: 2.5rem 1.5rem;
    }
    
    .news-detail-text {
        font-size: 1rem;
    }
    
    .news-detail-actions {
        flex-direction: column;
        align-items: flex-start;
    }
    
    /* 演讲嘉宾议程移动端优化 */
    .schedule-item > div > div {
        flex-direction: column !important;
    }
    
    .schedule-item > div > div > div:first-child {
        width: 100% !important;
    }
    
    /* 联系表单移动端优化 */
    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 4rem 0 2.5rem;
    }
    
    .hero-title {
        font-size: 1.5rem;
    }
    
    .hero-subtitle {
        font-size: 0.9375rem;
    }
    
    .hero-description {
        font-size: 0.875rem;
    }
    
    .hero-badge {
        font-size: 0.75rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
        padding: 1.5rem 0.5rem;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .stat-label {
        font-size: 0.6875rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .section {
        padding: 2rem 0.75rem;
    }
    
    .navbar-container {
        padding: 0 0.75rem;
    }
    
    .logo-text {
        font-size: 1.25rem;
    }
    
    .btn-primary,
    .btn-secondary {
        padding: 0.75rem 1.25rem;
        font-size: 0.9375rem;
    }
    
    .carousel-button {
        width: 2rem;
        height: 2rem;
    }
    
    .carousel-button svg {
        width: 16px;
        height: 16px;
    }
    
    /* 新闻详情页小屏幕优化 */
    .news-detail-title {
        font-size: 1.5rem;
    }
    
    .news-detail-content {
        padding: 2rem 1rem;
    }
}

/* ===== 工具类 ===== */
.text-center {
    text-align: center;
}

.mb-2 {
    margin-bottom: 0.5rem;
}

.mb-4 {
    margin-bottom: 1rem;
}

.mb-8 {
    margin-bottom: 2rem;
}

.mt-4 {
    margin-top: 1rem;
}

.mt-8 {
    margin-top: 2rem;
}

.p-4 {
    padding: 1rem;
}

.p-8 {
    padding: 2rem;
}

.rounded {
    border-radius: 0.5rem;
}

.rounded-lg {
    border-radius: 0.75rem;
}

.rounded-xl {
    border-radius: 1rem;
}

.shadow {
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.shadow-lg {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.hidden {
    display: none;
}

.flex {
    display: flex;
}

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

.justify-center {
    justify-content: center;
}

.gap-2 {
    gap: 0.5rem;
}

.gap-4 {
    gap: 1rem;
}

/* ===== 动画 ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.fade-in {
    animation: fadeIn 0.5s ease;
}

/* ===== SVG 图标颜色 ===== */
svg {
    width: 1em;
    height: 1em;
    fill: currentColor;
}

/* ========================================
   合作伙伴页面样式 (Partners Page)
======================================== */

/* 赞助方案卡片 */
.sponsor-tier {
    position: relative;
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.sponsor-tier:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
}

/* 特色赞助方案 */
.sponsor-tier.featured {
    border-color: #7c3aed;
    transform: scale(1.05);
    z-index: 10;
}

.sponsor-tier.featured:hover {
    transform: translateY(-8px) scale(1.05);
}

/* 顶部装饰条 */
.tier-badge {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 8px;
    background: linear-gradient(to right, #2563eb, #7c3aed);
    border-radius: 1rem 1rem 0 0;
}

.tier-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 0.5rem;
}

.tier-price {
    font-size: 1.875rem;
    font-weight: 900;
    color: var(--slate-900);
    margin-bottom: 1.5rem;
}

.tier-benefits {
    list-style: none;
    padding: 0;
    margin: 0 0 2rem 0;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.tier-benefits li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.875rem;
    color: #475569;
}

.tier-benefits svg {
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.tier-button {
    display: block;
    width: 100%;
    padding: 0.75rem;
    text-align: center;
    background: #f1f5f9;
    color: #334155;
    font-weight: 700;
    border-radius: 0.75rem;
    text-decoration: none;
    transition: all 0.3s ease;
}

.tier-button:hover {
    background: #e2e8f0;
}

.tier-button.primary {
    background: var(--blue-600);
    color: white;
}

.tier-button.primary:hover {
    background: var(--blue-700);
}

/* 定制赞助 CTA */
.custom-sponsor-cta {
    margin-top: 5rem;
    background: var(--slate-900);
    border-radius: 1.5rem;
    padding: 2.5rem;
    text-align: center;
    color: white;
}

/* ========================================
   画廊页面样式 (Gallery Page)
======================================== */

/* 画廊网格 */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 1rem;
    }
}

/* 画廊项目 */
.gallery-item {
    position: relative;
    aspect-ratio: 16/9;
    border-radius: 0.75rem;
    overflow: hidden;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.gallery-item:hover {
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
    transform: translateY(-4px);
}

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

.gallery-item:hover img {
    transform: scale(1.1);
}

/* 画廊遮罩 */
.gallery-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
    background: rgba(0, 0, 0, 0.5);
}

.gallery-icon {
    color: white;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.gallery-item:hover .gallery-icon {
    opacity: 1;
}

/* 画廊标题 */
.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.gallery-item:hover .gallery-caption {
    opacity: 1;
}

.gallery-caption p {
    color: white;
    font-size: 0.875rem;
    font-weight: 500;
    margin: 0;
}

/* 灯箱模态框 */
.lightbox {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 60;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(8px);
    align-items: center;
    justify-content: center;
    padding: 1rem;
    animation: fadeIn 0.3s ease;
}

.lightbox-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 9999px;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 50;
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.lightbox-content {
    max-width: 80rem;
    width: 100%;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 70vh;
    object-fit: contain;
    border-radius: 0.5rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

#lightboxCaption {
    margin-top: 1rem;
    color: white;
    font-size: 1.125rem;
    font-weight: 500;
    text-align: center;
}

/* ========================================
   首页演讲者预览样式
======================================== */

.speaker-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: transform 0.3s ease;
}

.speaker-card:hover {
    transform: translateY(-8px);
}

.speaker-image {
    position: relative;
    width: 10rem;
    height: 10rem;
    margin-bottom: 1rem;
    border-radius: 9999px;
    overflow: hidden;
    border: 4px solid white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease;
}

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

.speaker-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.speaker-name {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 0.25rem;
}

.speaker-company {
    font-size: 0.875rem;
    color: var(--blue-600);
    font-weight: 500;
}

@media (max-width: 768px) {
    .speaker-image {
        width: 8rem;
        height: 8rem;
    }
}

/* ========================================
   首页合作伙伴预览样式
======================================== */

.partner-logo {
    height: 6rem;
    background: white;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    padding: 1rem;
}

.partner-logo:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.partner-logo span {
    font-weight: 700;
    color: var(--slate-300);
}

/* 合作伙伴Logo图片样式 */
.partner-logo-img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    filter: none; /* 移除灰度滤镜，直接显示彩色 */
    opacity: 1; /* 完全不透明 */
    transition: all 0.3s ease;
}

.partner-logo:hover .partner-logo-img {
    transform: scale(1.05); /* 悬停时仅放大 */
}

/* ========================================
   首页新闻预览样式
======================================== */

.news-card {
    background: white;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--slate-100);
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none; /* 移除a标签下划线 */
    color: inherit; /* 继承父元素颜色 */
}

.news-card:hover {
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
    transform: translateY(-4px);
    text-decoration: none; /* hover时也不显示下划线 */
}

.news-image {
    position: relative;
    height: 12rem;
    overflow: hidden;
}

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

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

.news-date-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--blue-600);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.news-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.news-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 0.75rem;
    transition: color 0.3s ease;
    line-height: 1.4;
}

.news-card:hover .news-title {
    color: var(--blue-600);
}

.news-summary {
    color: var(--slate-600);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: 1rem;
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-read-more {
    color: var(--blue-600);
    font-weight: 700;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: auto;
    transition: all 0.3s ease;
    text-decoration: none;
}

.news-card:hover .news-read-more {
    transform: translateX(4px);
}

.news-read-more svg {
    flex-shrink: 0;
}

/* ========================================
   新闻卡片样式 (News Card Styles)
   用于新闻列表页面的卡片展示
======================================== */
.news-card {
    background: white;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    transform: translateY(-4px);
}

.news-image {
    height: 12rem;
    overflow: hidden;
    position: relative;
}

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

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

.news-date-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    color: #2563eb;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.news-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.news-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: #0f172a;
    transition: color 0.3s ease;
}

.news-card:hover .news-title {
    color: #2563eb;
}

.news-summary {
    color: #475569;
    font-size: 0.875rem;
    margin-bottom: 1rem;
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-read-more {
    color: #2563eb;
    font-weight: 700;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: transform 0.3s ease;
}

.news-card:hover .news-read-more {
    transform: translateX(0.25rem);
}

/* ========================================
   新闻详情页样式 (News Detail Page Styles)
   用于新闻详情页面的展示
======================================== */
.news-detail-hero {
    position: relative;
    height: 28rem;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.news-detail-hero-image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
}

.news-detail-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.3));
}

.news-detail-hero-content {
    position: relative;
    height: 100%;
    display: flex;
    align-items: flex-end;
    padding: 3rem 0 2rem;
    z-index: 1;
}

.news-detail-badge {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: rgba(37, 99, 235, 0.9);
    backdrop-filter: blur(8px);
    color: white;
    font-size: 0.875rem;
    font-weight: 700;
    border-radius: 9999px;
    margin-bottom: 1rem;
}

.news-detail-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: white;
    margin-bottom: 1rem;
    line-height: 1.2;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.news-detail-meta {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.9375rem;
}

.news-detail-meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.news-detail-body {
    background: white;
    position: relative;
    z-index: 2;
}

.news-detail-content {
    max-width: 48rem;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.news-detail-text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: #334155;
    white-space: pre-line;
}

.news-detail-text p {
    margin-bottom: 1.5rem;
}

.news-detail-actions {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid #e2e8f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.news-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: #2563eb;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s ease;
}

.news-back-btn:hover {
    gap: 0.75rem;
}

.news-share-buttons {
    display: flex;
    gap: 0.75rem;
}

.news-share-btn {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f1f5f9;
    color: #475569;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.news-share-btn:hover {
    background: #2563eb;
    color: white;
    transform: translateY(-2px);
}

/* ========================================
   演讲嘉宾页面样式 (Speakers Page Styles)
   用于演讲嘉宾列表和议程展示
======================================== */
.speaker-card {
    background: white;
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--slate-100);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.speaker-card:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    transform: translateY(-4px);
}

.speaker-avatar {
    width: 8rem;
    height: 8rem;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--slate-50);
    margin-bottom: 1rem;
}

.speaker-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 分页按钮 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin: 3rem 0;
}

.pagination-btn {
    padding: 0.5rem;
    border-radius: 50%;
    border: 1px solid var(--slate-200);
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--slate-600);
}

.pagination-btn:hover:not(:disabled) {
    background: var(--blue-50);
    border-color: var(--blue-200);
    color: var(--blue-600);
}

.pagination-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    border-color: var(--slate-200);
    color: var(--slate-300);
}

/* 议程标签 */
.agenda-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.agenda-tab {
    padding: 0.75rem 1.5rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    background: white;
    border: 1px solid var(--slate-200);
    color: var(--slate-600);
}

.agenda-tab.active {
    background: var(--blue-600);
    color: white;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    transform: scale(1.05);
    border-color: var(--blue-600);
}

.agenda-tab:hover:not(.active) {
    background: var(--slate-50);
}

/* 议程卡片 */
.schedule-card {
    background: white;
    border-radius: 1rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--slate-100);
    overflow: hidden;
}

.schedule-header {
    padding: 1.5rem;
    background: var(--slate-50);
    border-bottom: 1px solid var(--slate-100);
}

.schedule-item {
    padding: 1.5rem;
    border-bottom: 1px solid var(--slate-100);
    transition: background 0.3s ease;
}

.schedule-item:last-child {
    border-bottom: none;
}

.schedule-item:hover {
    background: var(--slate-50);
}

.schedule-item:hover h4 {
    color: var(--blue-600);
}

/* ========================================
   联系表单样式 (Contact Form Styles)
   用于联系我们页面的表单元素
======================================== */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

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

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: #334155;
    margin-bottom: 0.25rem;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.5rem 1rem;
    border: 1px solid #cbd5e1;
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.submit-btn {
    width: 100%;
    padding: 0.75rem 2rem;
    background: #2563eb;
    color: white;
    font-weight: 700;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: background 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.submit-btn:hover {
    background: #1d4ed8;
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.contact-info-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

.contact-icon {
    width: 2.5rem;
    height: 2.5rem;
    background: #dbeafe;
    color: #2563eb;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.social-btn {
    width: 3rem;
    height: 3rem;
    background: #f1f5f9;
    color: #475569;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-btn:hover {
    transform: translateY(-2px);
}

.social-btn.linkedin:hover {
    background: #2563eb;
    color: white;
}

.social-btn.twitter:hover {
    background: #3b82f6;
    color: white;
}

.social-btn.facebook:hover {
    background: #1e40af;
    color: white;
}

/* ===== 轮播样式 ===== */
.carousel-container {
    position: relative;
    overflow: hidden;
    padding: 0 3rem;
}

.carousel-wrapper {
    overflow: hidden;
    width: 100%;
}

.carousel-track {
    display: flex;
    transition: transform 0.3s ease;
    gap: 0; /* 移动端默认无gap */
}

.carousel-slide {
    flex: 0 0 100%;
    min-width: 100%;
    padding: 0; /* 移动端无内边距 */
}

.carousel-button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: white;
    border: none;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease;
    z-index: 10;
}

.carousel-button:hover {
    background: var(--blue-600);
    color: white;
    transform: translateY(-50%) scale(1.1);
}

/* 移动端按钮位置 */
.carousel-button.prev {
    left: 0.5rem;
}

.carousel-button.next {
    right: 0.5rem;
}

.carousel-button:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.carousel-button:disabled:hover {
    background: white;
    color: inherit;
    transform: translateY(-50%);
}

/* 暗色背景下的转播按钮 */
.section-dark .carousel-button {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.section-dark .carousel-button:hover {
    background: var(--blue-600);
    border-color: var(--blue-600);
    color: white;
}

.section-dark .carousel-dot {
    background: rgba(255, 255, 255, 0.3);
}

.section-dark .carousel-dot.active {
    background: white;
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

.carousel-dot {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: var(--slate-300);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
}

.carousel-dot.active {
    background: var(--blue-600);
    width: 1.5rem;
    border-radius: 0.25rem;
}

/* 桌面端演讲嘉宾和合作伙伴轮播 */
@media (min-width: 769px) {
    /* 演讲嘉宾：显示轮播控制，一行4个 */
    .speakers-carousel .carousel-container {
        padding: 0 3rem;
    }
    
    .speakers-carousel .carousel-button,
    .speakers-carousel .carousel-dots {
        display: flex;
    }
    
    .speakers-carousel .carousel-track {
        display: flex;
        gap: 1.5rem;
    }
    
    .speakers-carousel .carousel-slide {
        flex: 0 0 calc(25% - 1.125rem); /* 4个一行，减去gap */
        min-width: calc(25% - 1.125rem);
    }
    
    /* 合作伙伴：显示轮播控制，两行8个 */
    .partners-carousel .carousel-container {
        padding: 0 3rem;
    }
    
    .partners-carousel .carousel-button,
    .partners-carousel .carousel-dots {
        display: flex;
    }
    
    .partners-carousel .carousel-track {
        display: flex;
        flex-wrap: wrap;
        gap: 1.5rem;
    }
    
    .partners-carousel .carousel-slide {
        flex: 0 0 calc(25% - 1.125rem); /* 4个一行，两行共8个 */
        min-width: calc(25% - 1.125rem);
    }
}

/* ========================================
   分页导航样式 (Pagination Styles)
   用于新闻列表等分页组件
======================================== */
.pagination-nav {
    margin-top: 4rem;
}

.pagination {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.pagination-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--slate-200);
    border-radius: 0.5rem;
    background: white;
    color: var(--slate-600);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 2.5rem;
    justify-content: center;
}

.pagination-btn:hover:not(.active):not(.pagination-prev[style*="cursor: not-allowed"]) {
    background: var(--blue-50);
    border-color: var(--blue-200);
    color: var(--blue-600);
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.pagination-btn.active {
    background: var(--blue-600);
    border-color: var(--blue-600);
    color: white;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.pagination-prev,
.pagination-next {
    font-weight: 500;
}

.pagination-prev[style*="cursor: not-allowed"],
.pagination-next[style*="cursor: not-allowed"] {
    opacity: 0.5;
    cursor: not-allowed !important;
    pointer-events: none;
}

/* 移动端分页样式优化 */
@media (max-width: 768px) {
    .pagination {
        gap: 0.25rem;
    }
    
    .pagination-btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.875rem;
        min-width: 2rem;
    }
    
    .pagination-prev span,
    .pagination-next span {
        display: none;
    }
    
    .pagination-prev,
    .pagination-next {
        padding: 0.4rem;
    }
}

/* 响应式：超小屏幕 */
@media (max-width: 480px) {
    .pagination {
        gap: 0.2rem;
    }
    
    .pagination-btn {
        padding: 0.35rem 0.6rem;
        font-size: 0.8rem;
        min-width: 1.8rem;
    }
}