/*
 * NoviExpo - 杭州云智展览有限公司
 * 专业展览门户风格样式
 * 参照 cagexpo.com 浙江云图会展
 */

/* ==================== CSS变量 ==================== */
:root {
    /* 主色调 - 深蓝+金色 */
    --primary-color: #0a1628;
    --primary-light: #1a2d4a;
    --primary-lighter: #2a3f60;
    
    /* 金色点缀 */
    --accent-color: #c8a45c;
    --accent-light: #d4b56d;
    --accent-dark: #a8893f;
    
    /* 功能色 */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    /* 中性色 */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-dark: #0a1628;
    --bg-gray: #f3f4f6;
    
    /* 字体 */
    --font-cn: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-en: 'Montserrat', 'Inter', var(--font-cn);
    
    /* 间距 */
    --section-padding: 100px;
    --container-max: 1280px;
    
    /* 动画 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
}

/* ==================== 基础重置 ==================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-cn);
    color: var(--text-primary);
    background: var(--bg-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ==================== 容器 ==================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0);
    backdrop-filter: blur(0);
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    height: 80px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    height: 45px;
    width: auto;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    font-weight: 500;
    color: var(--text-primary);
    border-radius: 6px;
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-color);
}

.navbar.scrolled .nav-link {
    color: var(--text-primary);
}

.navbar:not(.scrolled) .nav-link {
    color: var(--bg-white);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.lang-btn {
    padding: 8px 16px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    color: white;
    background: transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.navbar.scrolled .lang-btn {
    border-color: var(--text-light);
    color: var(--text-primary);
}

.lang-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* 下拉菜单 */
.has-submenu {
    position: relative;
}

.submenu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    min-width: 180px;
    background: var(--bg-white);
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.has-submenu:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.submenu li a {
    display: block;
    padding: 10px 16px;
    font-size: 0.9375rem;
    color: var(--text-primary);
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.submenu li a:hover {
    background: var(--bg-gray);
    color: var(--accent-color);
}

/* 移动端菜单 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--primary-color);
    transition: all var(--transition-fast);
}

.navbar:not(.scrolled) .nav-toggle span {
    background: white;
}

/* ==================== Hero轮播 ==================== */
.hero-section {
    position: relative;
    min-height: 100vh;
    background: var(--bg-dark);
}

.hero-slider {
    position: relative;
    min-height: 100vh;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.hero-slide.active {
    opacity: 1;
    visibility: visible;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    width: 100%;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(200, 164, 92, 0.2);
    border: 1px solid var(--accent-color);
    border-radius: 50px;
    font-size: 0.875rem;
    color: var(--accent-color);
    margin-bottom: 24px;
}

.hero-title {
    font-family: var(--font-cn);
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    color: white;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-btns {
    display: flex;
    gap: 16px;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-icon {
    width: 300px;
    height: 300px;
    background: rgba(200, 164, 92, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8rem;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.hero-dots {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dot.active {
    background: var(--accent-color);
    transform: scale(1.2);
}

/* ==================== 数据亮点条 ==================== */
.stats-bar {
    background: var(--bg-white);
    padding: 40px 0;
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 10;
    margin-top: -60px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 30px;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

.stat-item {
    text-align: center;
    padding: 20px;
}

.stat-number {
    font-family: var(--font-en);
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-color);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-number::after {
    content: '+';
    font-size: 1.5rem;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ==================== 通用Section ==================== */
.section {
    padding: var(--section-padding) 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(200, 164, 92, 0.1);
    border: 1px solid var(--accent-color);
    border-radius: 50px;
    font-size: 0.875rem;
    color: var(--accent-color);
    font-weight: 500;
    margin-bottom: 16px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 16px;
    line-height: 1.3;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==================== 关于我们 ==================== */
.about-section {
    background: var(--bg-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-img-box {
    width: 100%;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.about-img-placeholder {
    font-size: 6rem;
}

.about-badge {
    position: absolute;
    top: -20px;
    right: -20px;
    background: var(--accent-color);
    color: white;
    padding: 24px;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.badge-number {
    font-family: var(--font-en);
    font-size: 2.5rem;
    font-weight: 700;
}

.badge-text {
    font-size: 0.875rem;
}

.about-content h3 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 24px;
}

.about-content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 32px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.feature-icon {
    width: 24px;
    height: 24px;
    background: var(--accent-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: bold;
}

/* ==================== 核心业务 ==================== */
.services-section {
    background: var(--bg-gray);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    transition: all var(--transition-normal);
    border: 1px solid transparent;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-color);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.service-icon svg {
    width: 36px;
    height: 36px;
    color: white;
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.service-card p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==================== 全球展会 ==================== */
.exhibitions-section {
    background: var(--bg-dark);
}

.exhibitions-section .section-title,
.exhibitions-section .section-subtitle {
    color: white;
}

.exhibition-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    color: rgba(255, 255, 255, 0.7);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.tab-btn:hover,
.tab-btn.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

.exhibition-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.exhibition-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 24px;
    transition: all var(--transition-normal);
}

.exhibition-card:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-color);
    transform: translateY(-4px);
}

.exhibition-card h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: white;
    margin-bottom: 8px;
}

.exhibition-card p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
}

/* ==================== 成功案例 ==================== */
.cases-section {
    background: var(--bg-white);
}

.cases-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
}

.filter-btn {
    padding: 10px 24px;
    background: var(--bg-gray);
    border-radius: 50px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--accent-color);
    color: white;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.case-card {
    background: var(--bg-white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.case-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.case-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: white;
}

.case-content {
    padding: 24px;
}

.case-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(200, 164, 92, 0.1);
    border: 1px solid var(--accent-color);
    border-radius: 50px;
    font-size: 0.75rem;
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 12px;
}

.case-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.case-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
}

.case-meta {
    display: flex;
    gap: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--bg-gray);
    font-size: 0.8125rem;
    color: var(--text-light);
}

.section-cta {
    text-align: center;
    margin-top: 40px;
}

/* ==================== 新闻动态 ==================== */
.news-section {
    background: var(--bg-gray);
}

.news-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.news-featured {
    background: var(--bg-white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.news-featured:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.news-image {
    position: relative;
    height: 280px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
}

.news-tag {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 16px;
    background: var(--accent-color);
    color: white;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

.news-content {
    padding: 24px;
}

.news-date {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 8px;
    display: block;
}

.news-content h3 {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 12px;
    line-height: 1.4;
}

.news-content p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.news-link {
    color: var(--accent-color);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.news-link:hover {
    color: var(--accent-dark);
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.news-item {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 24px;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.news-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.news-item-date {
    font-size: 0.8125rem;
    color: var(--text-light);
    margin-bottom: 8px;
    display: block;
}

.news-item h4 {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
    line-height: 1.4;
}

.news-item a {
    font-size: 0.875rem;
    color: var(--accent-color);
    font-weight: 500;
}

/* ==================== 服务流程 ==================== */
.process-section {
    background: var(--bg-white);
}

.process-timeline {
    display: flex;
    justify-content: space-between;
    position: relative;
    padding: 40px 0;
}

.process-timeline::before {
    content: '';
    position: absolute;
    top: 65px;
    left: 10%;
    right: 10%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color), var(--primary-color));
}

.process-step {
    flex: 1;
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-num {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-family: var(--font-en);
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    box-shadow: var(--shadow-lg);
}

.process-step h4 {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.process-step p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ==================== 视频专区 ==================== */
.videos-section {
    background: var(--bg-dark);
}

.videos-section .section-title,
.videos-section .section-subtitle {
    color: white;
}

.videos-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.video-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    overflow: hidden;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.video-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-color);
    box-shadow: var(--shadow-xl);
}

.video-thumbnail {
    position: relative;
    height: 180px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}

.video-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(200, 164, 92, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    transition: all var(--transition-fast);
}

.video-card:hover .video-play {
    transform: translate(-50%, -50%) scale(1.1);
}

.video-info {
    padding: 20px;
}

.video-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: white;
    margin-bottom: 8px;
}

.video-meta {
    display: flex;
    gap: 16px;
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.6);
}

.video-platform {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    font-size: 0.75rem;
    color: white;
    margin-top: 12px;
}

/* ==================== 合作伙伴 ==================== */
.partners-section {
    background: var(--bg-white);
    padding: 60px 0;
}

.partners-slider {
    overflow: hidden;
    position: relative;
}

.partners-track {
    display: flex;
    gap: 60px;
    animation: scroll 30s linear infinite;
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.partner-logo {
    flex-shrink: 0;
    padding: 20px 40px;
    background: var(--bg-gray);
    border-radius: 12px;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.partner-logo:hover {
    background: var(--primary-color);
    color: white;
}

/* ==================== 社交媒体 ==================== */
.social-section {
    background: var(--bg-gray);
}

.social-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.social-card {
    background: var(--bg-white);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    transition: all var(--transition-normal);
}

.social-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.social-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.social-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.social-card p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.social-qr {
    width: 120px;
    height: 120px;
    margin: 0 auto;
    background: var(--bg-gray);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.social-qr img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.qr-placeholder {
    font-size: 3rem;
}

.social-link {
    display: inline-block;
    padding: 10px 24px;
    background: var(--accent-color);
    color: white;
    border-radius: 50px;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--accent-dark);
    color: white;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 12px;
}

.social-link-btn {
    padding: 10px 20px;
    background: var(--bg-gray);
    border-radius: 50px;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.social-link-btn:hover {
    background: var(--accent-color);
    color: white;
}

/* ==================== 联系我们 ==================== */
.contact-section {
    background: var(--bg-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.contact-text h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.contact-text p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.contact-form-wrapper {
    background: var(--bg-gray);
    padding: 40px;
    border-radius: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--bg-gray);
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-fast);
    background: var(--bg-white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(200, 164, 92, 0.1);
}

.form-group textarea {
    min-height: 140px;
    resize: vertical;
}

/* ==================== 按钮 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 10px;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.btn-primary {
    background: var(--accent-color);
    color: white;
    border: none;
}

.btn-primary:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(200, 164, 92, 0.3);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
    border-color: white;
    background: rgba(255, 255, 255, 0.1);
}

.btn-full {
    width: 100%;
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 80px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo img {
    height: 45px;
    filter: brightness(0) invert(1);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-icon-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all var(--transition-fast);
}

.social-icon-link:hover {
    background: var(--accent-color);
    transform: translateY(-4px);
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-column li {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-column a {
    transition: all var(--transition-fast);
}

.footer-column a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.5);
    transition: all var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-color);
}

/* ==================== 视频模态框 ==================== */
.video-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.video-modal.active {
    opacity: 1;
    visibility: visible;
}

.video-modal-content {
    position: relative;
    width: 90%;
    max-width: 900px;
    aspect-ratio: 16/9;
    background: var(--bg-dark);
    border-radius: 16px;
    overflow: hidden;
}

.video-modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.video-modal-close:hover {
    background: var(--accent-color);
}

.video-embed {
    width: 100%;
    height: 100%;
}

.video-embed iframe {
    width: 100%;
    height: 100%;
}

/* ==================== 滚动动画 ==================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    :root {
        --section-padding: 80px;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-btns {
        justify-content: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .exhibition-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .videos-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .social-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-timeline {
        flex-wrap: wrap;
        gap: 40px;
    }
    
    .process-timeline::before {
        display: none;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-actions {
        display: none;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid,
    .exhibition-grid,
    .cases-grid,
    .videos-grid,
    .social-grid {
        grid-template-columns: 1fr;
    }
    
    .process-step {
        flex: 0 0 100%;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* ==================== 动画 ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}