/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

a {
    text-decoration: none;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    overflow-x: hidden;
}

/* 顶部信息条 */
.top-bar {
    background: #1B3A5C;
    color: #fff;
    height: 40px;
    font-size: 13px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1031;
    transition: transform 0.3s, opacity 0.3s;
}

.top-bar.hidden {
    transform: translateY(-100%);
    opacity: 0;
}

.top-bar a {
    color: #fff;
    transition: opacity 0.2s;
}

.top-bar a:hover {
    opacity: 0.8;
    color: #fff;
}

.top-bar-right a {
    margin-left: 12px;
    font-size: 15px;
}

/* 导航栏 - Bootstrap Navbar 样式覆盖 */
#topNav {
    background: transparent;
    transition: background 0.3s, box-shadow 0.3s, top 0.3s;
    padding: 0;
    min-height: 80px;
    top: 40px;
}

#topNav.bar-hidden {
    top: 0;
}

/* 非首页导航栏默认白底 */
#topNav.solid-nav {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

#topNav.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

#topNav .navbar-brand {
    font-size: 20px;
    font-weight: 700;
    color: #232323;
    transition: color 0.3s;
    padding: 0;
    display: flex;
    align-items: center;
    height: 80px;
}

#topNav .navbar-brand img {
    height: 80%;
    width: auto;
}

#topNav .nav-link {
    font-size: 18px;
    color: #232323;
    padding: 8px 16px;
    transition: color 0.3s;
}

#topNav .nav-link:hover,
#topNav .nav-link.active {
    color: #2978fa;
}

#topNav.scrolled .nav-link:hover,
#topNav.scrolled .nav-link.active {
    color: #2978fa;
}

#topNav .dropdown-menu {
    border: 1px solid #e8e8e8;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    padding: 8px 0;
}

#topNav .dropdown-item {
    padding: 8px 20px;
    font-size: 15px;
    color: #333;
    transition: all 0.2s;
}

#topNav .dropdown-item:hover {
    background: #f0f6ff;
    color: #2978fa;
}

@media (min-width: 992px) {
    #topNav .dropdown-menu {
        min-width: 140px;
        border: 1px solid #e8e8e8;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
        padding: 8px 0;
        opacity: 0;
        transform: translateY(10px);
        transition: opacity 0.25s ease, transform 0.25s ease;
        pointer-events: none;
        display: block !important;
    }

    #topNav .nav-item:hover > .dropdown-menu {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }

    #topNav .dropdown-menu.show {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }
}

.navbar-toggler {
    padding: 4px 8px;
}

.navbar-toggler:focus {
    box-shadow: none;
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%2835, 35, 35, 1%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* 轮播图 */
.banner-section {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

.banner-slider {
    width: 100%;
    height: 100%;
}

.banner-slide {
    position: absolute;
    top: -5%;
    left: -5%;
    width: 110%;
    height: 110%;
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    opacity: 0;
    transition: background-position 0.2s ease-out;
}

.banner-slide.active {
    opacity: 1;
}

.banner-slide::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, rgba(0,0,0,0.20) 0%, rgba(0,0,0,0.06) 50%, transparent 100%);
    pointer-events: none;
}

/* 轮播文字容器 */
.banner-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    max-width: 1200px;
    padding: 0 40px;
    text-align: center;
    z-index: 2;
    pointer-events: none;
    box-sizing: border-box;
}

/* 展会标签 */
.banner-badge {
    display: inline-block;
    padding: 8px 24px;
    border: 1px solid rgba(255,255,255,0.5);
    color: #fff;
    font-size: 14px;
    letter-spacing: 3px;
    margin-bottom: 32px;
    backdrop-filter: blur(4px);
    background: rgba(255,255,255,0.08);
}

/* 主标题 */
.banner-headline {
    font-size: 56px;
    font-weight: 700;
    color: #fff;
    line-height: 1.25;
    margin-bottom: 16px;
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
    letter-spacing: 2px;
}

.banner-headline .highlight {
    color: #ffd54f;
}

/* 幻灯片2 标题稍小 */
.banner-headline-sm {
    font-size: 36px;
    margin-bottom: 44px;
}

/* 副标题 */
.banner-subtitle {
    font-size: 22px;
    color: rgba(255,255,255,0.85);
    font-weight: 300;
    letter-spacing: 4px;
    margin-bottom: 28px;
}

/* 描述文字 */
.banner-desc {
    font-size: 17px;
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
    max-width: 600px;
    margin: 0 auto 36px;
}

/* CTA 按钮组 */
.banner-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    pointer-events: auto;
}

.banner-btn {
    display: inline-block;
    padding: 14px 40px;
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 1px;
    text-decoration: none;
    transition: all 0.3s;
    cursor: pointer;
}

.banner-btn-primary {
    background: #2978fa;
    color: #fff;
    border: 2px solid #2978fa;
}

.banner-btn-primary:hover {
    background: #1e50ae;
    border-color: #1e50ae;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(41,120,250,0.4);
}

.banner-btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.7);
}

.banner-btn-outline:hover {
    background: #fff;
    color: #232323;
    border-color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255,255,255,0.2);
}

/* 轮播数据行 */
.banner-stats {
    display: flex;
    gap: 48px;
    justify-content: center;
    margin-bottom: 36px;
}

.banner-stat-item {
    text-align: center;
}

.banner-stat-num {
    display: block;
    font-size: 42px;
    font-weight: 700;
    color: #ffd54f;
    line-height: 1;
    margin-bottom: 6px;
    text-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

.banner-stat-num small {
    font-size: 20px;
    font-weight: 400;
}

.banner-stat-label {
    font-size: 14px;
    color: rgba(255,255,255,0.75);
    letter-spacing: 2px;
}

/* 轮播文字动画 */
.banner-slide .banner-content > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.banner-slide.active .banner-content > * {
    opacity: 1;
    transform: translateY(0);
}

.banner-slide.active .banner-content > *:nth-child(1) { transition-delay: 0.15s; }
.banner-slide.active .banner-content > *:nth-child(2) { transition-delay: 0.36s; }
.banner-slide.active .banner-content > *:nth-child(3) { transition-delay: 0.57s; }
.banner-slide.active .banner-content > *:nth-child(4) { transition-delay: 0.78s; }
.banner-slide.active .banner-content > *:nth-child(5) { transition-delay: 0.99s; }
.banner-slide.active .banner-content > *:nth-child(6) { transition-delay: 1.20s; }

.banner-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(200, 200, 200, 1);
    cursor: pointer;
    transition: all 0.3s;
}

.dot.active {
    background: #fff;
    transform: scale(1.3);
}

.banner-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 60px;
    height: 60px;
    background: transparent;
    color: rgba(200, 200, 200, 1);
    font-size: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s;
}

.banner-arrow:hover {
    color: rgba(100, 100, 100, 0.8);
    transform: translateY(-50%) scale(1.1);
}

.banner-prev {
    left: 30px;
}

.banner-next {
    right: 30px;
}

/* 通用区块 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    font-size: 40px;
    font-weight: 700;
    color: #232323;
    margin-bottom: 60px;
}

/* 关于我们 */
.about-section {
    background: url('../images/bg2.jpg') center/cover no-repeat;
    position: relative;
}

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

.about-content {
    display: flex;
    gap: 60px;
    align-items: flex-start;
    margin-bottom: 60px;
}

.about-left {
    flex: 1;
}

.about-title {
    font-size: 67px;
    font-weight: bold;
    color: #2978fa;
    margin-bottom: 20px;
}

.about-slogan {
    font-size: 36px;
    font-weight: 700;
    color: #232323;
    margin-top: 40px;
    line-height: 1.4;
}

.about-right {
    flex: 1;
}

.about-company {
    font-size: 30px;
    color: #2978fa;
    margin-bottom: 30px;
    font-weight: 500;
}

.about-desc {
    font-size: 18px;
    color: #555;
    line-height: 35px;
    margin-bottom: 20px;
}

.about-image {
    margin-bottom: 60px;
}

.about-deco-img {
    width: 100%;
}

.stats-row {
    display: flex;
    justify-content: space-around;
    text-align: center;
}

.stat-item {
    padding: 30px;
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    color: #2978fa;
    margin-bottom: 10px;
}

.stat-unit {
    font-size: 36px;
    margin-left: 2px;
}

.stat-label {
    font-size: 24px;
    color: #444;
    font-weight: 500;
}

/* 主营业务 */
.business-section {
    background: url('../images/product.jpg') center/cover no-repeat;
    position: relative;
    overflow: hidden;
}


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

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

.business-card {
    position: relative;
    height: 380px;
    background: linear-gradient(180deg, #3a8ee6 0%, #5faef7 40%, #7ec8fa 70%, #a8ddf8 100%);
    border-radius: 80px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 15px;
    padding: 40px 20px;
}

.business-card:nth-child(1) {
    border-radius: 80px 80px 0 80px;
    margin-top: 0;
}

.business-card:nth-child(2) {
    border-radius: 80px 80px 80px 0;
    margin-top: 80px;
}

.business-card:nth-child(3) {
    border-radius: 80px 80px 0 80px;
    margin-top: 0;
}

.business-card:nth-child(4) {
    border-radius: 80px 80px 80px 0;
    margin-top: 80px;
}

.business-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    background: #fff;
}

.business-card:hover .card-title {
    color: #232323;
}

.business-card:hover .card-title-en {
    color: #666;
}

.card-icon-wrap {
    position: relative;
    width: 80px;
    height: 80px;
}

.card-icon {
    position: absolute;
    top: 0;
    left: 0;
    width: 80px;
    height: 80px;
}

.card-icon-default {
    z-index: 2;
}

.card-icon-hover {
    z-index: 1;
}

.business-card:hover .card-icon-default {
    z-index: 1;
}

.business-card:hover .card-icon-hover {
    z-index: 2;
}

.card-content {
    text-align: center;
    position: relative;
}

.card-title {
    font-size: 22px;
    color: #fff;
    margin-bottom: 5px;
    font-weight: 500;
    transition: color 0.3s;
}

.card-title-en {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0;
    transition: color 0.3s;
}

/* 展会介绍 */
.expo-section {
    background: url('../images/bg.jpg') center/cover no-repeat;
    position: relative;
}

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

.expo-content {
    max-width: 1200px;
    margin: 0 auto;
}

.expo-main {
    display: flex;
    gap: 40px;
    margin-bottom: 50px;
    align-items: flex-start;
}

.expo-image {
    flex: 0 0 450px;
    border-radius: 5px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.expo-image img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    display: block;
}

.expo-info {
    flex: 1;
}

.expo-name {
    font-size: 28px;
    color: #232323;
    font-weight: 600;
    margin-bottom: 6px;
}

.expo-subtitle {
    font-size: 14px;
    color: #999;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.expo-meta {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 24px;
    margin-top: 20px;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    color: #333;
    font-weight: 500;
}

.meta-item i {
    color: #2978fa;
    font-size: 20px;
    width: 24px;
    text-align: center;
}

.expo-desc {
    font-size: 15px;
    line-height: 1.8;
    color: #666;
}

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

.highlight-card {
    background: #fff;
    border-radius: 12px;
    padding: 30px 20px;
    text-align: center;
    transition: transform 0.3s;
    border: none;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.highlight-card:hover {
    transform: translateY(-6px) !important;
}

.highlight-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #2978fa, #1a5bc4);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.highlight-icon i {
    font-size: 24px;
    color: #fff;
}

.highlight-text {
    display: flex;
    flex-direction: column;
    margin-bottom: 12px;
}

.highlight-number {
    font-size: 32px;
    font-weight: 700;
    color: #2978fa;
    line-height: 1.2;
}

.highlight-label {
    font-size: 16px;
    color: #333;
    font-weight: 500;
    margin-top: 4px;
}

.highlight-desc {
    font-size: 13px;
    color: #999;
    margin: 0;
    line-height: 1.5;
}

/* 展商品牌 */
.links-section {
    background: url('../images/exhibitor_bg.jpg') center/cover no-repeat;
    position: relative;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.link-item {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100px;
    padding: 15px;
    background: #f8f9fa;
    border: 1px solid #e8e8e8;
    transition: all 0.15s;
}

.link-item:hover {
    background: #e8f4ff;
    transform: translateY(-2px);
}

.link-item img {
    max-height: 50px;
    max-width: 80%;
    height: auto;
    width: auto;
}

/* 展会新闻 */
.news-section {
    background: url('../images/bg3.jpg') center/cover no-repeat;
    position: relative;
}

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

.news-card-link {
    display: block;
    color: inherit;
    text-decoration: none;
}

.news-card-link:hover {
    color: inherit;
}

.news-card {
    background: #fff;
    border: 1px solid #e8e8e8;
    overflow: hidden;
    transition: transform 0.15s, box-shadow 0.15s;
}

.news-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.news-card-img {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.news-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s;
}

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

.news-card-img .news-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    color: #fff;
    background: rgba(41, 120, 250, 0.88);
    backdrop-filter: blur(4px);
}

.news-card-body {
    padding: 22px 24px 28px;
}

.news-tag {
    display: inline-block;
    padding: 4px 14px;
    font-size: 12px;
    font-weight: 500;
}

.news-card-body h3 {
    font-size: 18px;
    color: #232323;
    line-height: 1.5;
    margin-bottom: 12px;
    font-weight: 500;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-excerpt {
    font-size: 14px;
    color: #888;
    line-height: 1.7;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid #f0f0f0;
}

.news-date {
    font-size: 13px;
    color: #aaa;
}

.news-more {
    font-size: 14px;
    color: #2978fa;
    font-weight: 500;
    transition: gap 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.news-more:hover {
    gap: 8px;
}

/* 展位预约 */
.booking-section {
    background: url('../images/exhibitor_bg.jpg') center/cover no-repeat;
    position: relative;
}

.booking-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 40px;
    align-items: stretch;
}

.booking-form {
    background: #ffffff;
    padding: 44px 40px;
    border: 1px solid #e8e8e8;
}

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

.form-group {
    margin-bottom: 22px;
}

.form-row + .form-group {
    margin-top: 20px;
}

.form-row .form-group {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    font-size: 15px;
    color: #333;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid #e0e0e0;
    font-size: 15px;
    transition: border-color 0.15s;
    background: #fafafa;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2978fa;
    background: #fff;
}

.submit-btn {
    width: 100%;
    padding: 14px;
    background: #2978fa;
    color: #fff;
    border: none;
    font-size: 17px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s;
    margin-top: 6px;
}

.submit-btn:hover {
    background: #1e50ae;
}

.booking-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
    justify-content: space-between;
}

.info-card {
    display: flex;
    align-items: center;
    gap: 16px;
    background: #ffffff;
    padding: 20px;
    border: 1px solid #e8e8e8;
    transition: background 0.15s;
}

.info-card:hover {
    background: #fafafa;
}

.info-icon {
    width: 44px;
    height: 44px;
    background: #eef4ff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.info-label {
    font-size: 13px;
    color: #999;
    margin-bottom: 4px;
}

.info-value {
    font-size: 16px;
    color: #232323;
    font-weight: 500;
}

/* 返回顶部按钮 */
#backToTop {
    position: fixed;
    bottom: 40px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: #2978fa;
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 18px;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s;
    box-shadow: 0 4px 15px rgba(41, 120, 250, 0.35);
}

#backToTop.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

#backToTop:hover {
    background: #1e50ae;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(41, 120, 250, 0.5);
}

/* 底部 */
.footer {
    background: #1a2332;
    color: #fff;
    padding: 0;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

/* 顶部：Logo + 简介 */
.footer-top {
    padding: 48px 0 36px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 20px;
}

.footer-logo {
    height: 44px;
    flex-shrink: 0;
}

.footer-slogan {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.7;
    max-width: 600px;
    margin: 0;
}

.footer-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.12);
}

/* 中部：四列布局 */
.footer-middle {
    display: grid;
    grid-template-columns: 1fr 1fr 1.4fr 1.2fr;
    gap: 40px;
    padding: 44px 0;
}

.footer-col-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #fff;
}

.footer-col-title i {
    margin-right: 6px;
    font-size: 14px;
    color: #5ba3f5;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    transition: color 0.2s;
}

.footer-links a:hover {
    color: #5ba3f5;
}

.footer-links a i {
    font-size: 12px;
    margin-right: 6px;
    color: rgba(255, 255, 255, 0.3);
    transition: color 0.2s;
}

.footer-links a:hover i {
    color: #5ba3f5;
}

/* 联系我们列表 */
.footer-contact-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-contact-item i {
    width: 16px;
    text-align: center;
    color: rgba(255, 255, 255, 0.4);
    font-size: 13px;
    flex-shrink: 0;
}

/* 二维码组 */
.footer-qrcode-group {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-qrcode-item {
    text-align: center;
}

.footer-qrcode-item img {
    width: 96px;
    height: 96px;
    margin-bottom: 8px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 4px;
    background: #fff;
}

.footer-qrcode-item p {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.55);
}

/* 底部版权 */
.footer-bottom {
    text-align: center;
    padding: 24px 0;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.35);
    line-height: 1.8;
}

/* 滚动动画 - 初始隐藏，IntersectionObserver 触发后显示 */
.section-title,
.about-content,
.business-card,
.highlight-card,
.news-card,
.stat-number {
    opacity: 0;
    transform: translateY(30px);
}

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

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

.business-card.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

.highlight-card.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

.news-card.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .about-content {
        flex-direction: column;
    }

    .business-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .business-card:nth-child(1),
    .business-card:nth-child(2),
    .business-card:nth-child(3),
    .business-card:nth-child(4) {
        border-radius: 80px;
        margin-top: 0;
    }

    .expo-main {
        flex-direction: column;
    }

    .expo-image {
        flex: none;
        width: 100%;
    }

    .expo-highlights {
        grid-template-columns: repeat(2, 1fr);
    }

    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .booking-content {
        grid-template-columns: 1fr;
    }
}

/* 移动端导航栏：始终白底黑字 */
@media (max-width: 991px) {
    .top-bar {
        height: 36px;
        font-size: 12px;
    }

    .top-bar-left span:nth-child(2) {
        display: none;
    }

    #topNav {
        background: rgba(255, 255, 255, 0.98) !important;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
        top: 36px;
    }

    #topNav.bar-hidden {
        top: 0;
    }

    #topNav .navbar-brand,
    #topNav .nav-link {
        color: #232323 !important;
    }

    #topNav .navbar-toggler-icon,
    #topNav:not(.scrolled) .navbar-toggler-icon {
        background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%2835, 35, 35, 1%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
    }
}

@media (max-width: 767px) {
    .top-bar-left span:nth-child(1),
    .top-bar-left span:nth-child(2) {
        display: none;
    }

    .top-bar-right {
        margin-left: auto;
    }
}

@media (max-width: 768px) {
    .banner-section {
        height: 496px;  /* 原始 380px + 导航栏偏移 116px */
        margin-top: 116px;  /* top-bar 36px + navbar 80px */
    }

    .banner-slide {
        top: -3%;
        left: -3%;
        width: 106%;
        height: 106%;
    }

    .banner-content {
        width: 100%;
        padding: 0 24px;
    }

    .banner-headline,
    .banner-headline-sm {
        font-size: 22px;
        letter-spacing: 1px;
        margin-bottom: 20px;
    }

    .banner-subtitle {
        font-size: 13px;
        letter-spacing: 2px;
        margin-bottom: 12px;
    }

    .banner-desc {
        display: none;
    }

    .banner-badge {
        font-size: 10px;
        padding: 5px 10px;
        letter-spacing: 1px;
        margin-bottom: 16px;
        max-width: 90vw;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .banner-actions {
        gap: 10px;
    }

    .banner-btn {
        padding: 10px 22px;
        font-size: 13px;
    }

    .banner-stats {
        gap: 14px;
        margin-bottom: 16px;
    }

    .banner-stat-num {
        font-size: 24px;
    }

    .banner-stat-num small {
        font-size: 11px;
    }

    .banner-stat-label {
        font-size: 10px;
        letter-spacing: 1px;
    }

    .banner-arrow {
        width: 36px;
        height: 36px;
        font-size: 18px;
    }

    .banner-prev {
        left: 10px;
    }

    .banner-next {
        right: 10px;
    }

    .banner-dots {
        bottom: 16px;
    }

    .dot {
        width: 10px;
        height: 10px;
    }

    .about-title {
        font-size: 36px;
    }

    .about-company {
        font-size: 20px;
        font-weight: bold;
    }

    .about-desc {
        font-size: 16px;
        line-height: 1.8;
    }

    .about-slogan {
        font-size: 24px;
    }

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 24px;
        margin-bottom: 40px;
    }

    .stat-number {
        font-size: 36px;
    }

    .stat-label {
        font-size: 18px;
    }

    .stats-row {
        flex-direction: column;
        gap: 10px;
    }

    .stat-item {
        padding: 20px 0;
    }

    .business-card {
        height: 280px;
        border-radius: 80px !important;
    }

    .business-section::before {
        font-size: 40px;
        letter-spacing: 8px;
    }

    .card-title {
        font-size: 22px;
    }

    .card-title-en {
        font-size: 12px;
    }

    .links-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .link-item {
        height: 80px;
        padding: 10px;
    }

    .link-item img {
        max-height: 36px;
        max-width: 80%;
    }

    .expo-name {
        font-size: 24px;
    }

    .expo-meta {
        flex-direction: column;
        gap: 10px;
    }

    .expo-highlights {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .news-grid {
        grid-template-columns: 1fr;
    }

    .booking-content {
        gap: 24px;
    }

    .booking-form {
        padding: 24px 20px;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .form-row .form-group {
        margin-bottom: 22px;
    }

    .form-group input,
    .form-group textarea {
        padding: 12px;
        font-size: 14px;
    }

    .submit-btn {
        padding: 12px;
        font-size: 16px;
    }

    .footer-content {
        padding: 0 20px;
    }

    .footer-top {
        padding: 32px 0 24px;
    }

    .footer-brand {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .footer-slogan {
        max-width: 100%;
    }

    .footer-middle {
        grid-template-columns: 1fr 1fr;
        gap: 32px 28px;
        padding: 32px 0;
    }

    .footer-qrcode-group {
        gap: 16px;
    }

    .footer-qrcode-item img {
        width: 80px;
        height: 80px;
    }

    .footer-bottom {
        padding: 20px 0;
    }
}

/* ===== Toast 提示弹窗 ===== */
.toast-modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: toastFadeIn 0.25s ease;
}
.toast-modal-content {
    background: #fff;
    padding: 40px 48px 32px;
    text-align: center;
    min-width: 320px;
    max-width: 420px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    animation: toastSlideUp 0.3s ease;
}
.toast-modal-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: #fff;
}
.toast-modal-icon.success {
    background: linear-gradient(135deg, #2978fa 0%, #1e50ae 100%);
    box-shadow: 0 6px 20px rgba(41, 120, 250, 0.35);
}
.toast-modal-icon.error {
    background: linear-gradient(135deg, #e04040 0%, #c02020 100%);
    box-shadow: 0 6px 20px rgba(224, 64, 64, 0.35);
}
.toast-modal-msg {
    font-size: 16px;
    color: #333;
    line-height: 1.6;
    margin-bottom: 28px;
}
.toast-modal-btn {
    padding: 10px 48px;
    background: #2978fa;
    color: #fff;
    border: none;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s;
}
.toast-modal-btn:hover {
    background: #1e50ae;
}
@keyframes toastFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes toastSlideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}