/* 浅蓝主题 - 调亮背景版，包含全新核心产业布局及投资合作标题居中 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: #F5FAFF;   /* 调亮背景 */
    color: #1A3B5C;
    line-height: 1.5;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 40px;
}

@media (max-width: 768px) {
    .container { padding: 0 24px; }
}

/* 头部导航 */
.site-header {
    background: rgba(255, 255, 255, 0.98);
    /* 移除 backdrop-filter: blur(2px); */
    position: relative;  /* 改为 relative，固定由 JS 控制 */
    z-index: 1000;
    border-bottom: 1px solid #D9E6F2;
    box-shadow: 0 2px 12px rgba(74, 144, 226, 0.05);
    transition: box-shadow 0.2s;
}

.header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.logo-area a,
.logo-area {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 1.6rem;
    letter-spacing: -0.5px;
    color: #1A3B5C;
    text-decoration: none;
}

.logo i {
    color: #4A90E2;
    font-size: 1.8rem;
}

.main-nav ul {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.main-nav a {
    text-decoration: none;
    color: #2C5F8A;
    font-weight: 500;
    transition: color 0.2s;
}

.main-nav a:hover,
.main-nav a.active {
    color: #4A90E2;
}

.header-actions {
    display: flex;
    gap: 12px;
}

.header-actions button {
    background: none;
    border: none;
    font-size: 1.3rem;
    cursor: pointer;
    color: #2C5F8A;
}

.user-btn:hover {
    color: #4A90E2;
}

.mobile-menu-btn {
    display: none;
}

/* 移动菜单 */
.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: white;
    z-index: 2000;
    transition: left 0.3s ease;
}

.mobile-nav-overlay.open {
    left: 0;
}

.mobile-nav-container {
    padding: 30px 24px;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.mobile-nav-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
}

.close-mobile {
    background: none;
    border: none;
    font-size: 1.6rem;
    cursor: pointer;
}

.mobile-nav-list {
    list-style: none;
    margin-bottom: auto;
}

.mobile-nav-list li {
    margin-bottom: 24px;
}

.mobile-nav-list a {
    text-decoration: none;
    font-size: 1.3rem;
    font-weight: 500;
    color: #1A3B5C;
}

.mobile-user-links {
    display: flex;
    gap: 20px;
    padding-top: 30px;
    border-top: 1px solid #D9E6F2;
}

.mobile-user-links a {
    text-decoration: none;
    color: #4A90E2;
    font-weight: 500;
}

/* Hero 区域 */
.hero-section {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    text-align: center;
    background: linear-gradient(135deg, #D9ECFA 0%, #C2E0F7 100%);
    color: #1A3B5C;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: url('https://picsum.photos/id/15/1920/1080');
    background-size: cover;
    opacity: 0.2;
    mix-blend-mode: overlay;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
}

.hero-tagline {
    display: inline-block;
    background: rgba(74, 144, 226, 0.15);
    padding: 6px 14px;
    border-radius: 40px;
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
}

.hero-content h1 {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.85;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 40px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
}

.btn-primary {
    background: #4A90E2;
    color: white;
    box-shadow: 0 6px 14px rgba(74, 144, 226, 0.3);
}

.btn-primary:hover {
    background: #357ABD;
    transform: translateY(-2px);
}

.btn-outline {
    border: 1.5px solid #1A3B5C;
    color: #1A3B5C;
    background: transparent;
}

.btn-outline:hover {
    background: rgba(74, 144, 226, 0.1);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
}

.stat-number {
    font-size: 1.8rem;
    font-weight: 700;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.8rem;
}

/* 通用section */
section {
    padding: 80px 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.section-subtitle {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #4A90E2;
    font-weight: 600;
}

.section-title-block h2 {
    font-size: 2.8rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.section-title-block h2 span {
    color: #4A90E2;
}

.view-all {
    text-decoration: none;
    font-weight: 500;
    color: #2C5F8A;
    border-bottom: 1px solid #CDE4F5;
}

.view-all:hover {
    color: #4A90E2;
    border-bottom-color: #4A90E2;
}

/* 公司介绍模块 */
.company-section {
    background: white;
    border-radius: 48px;
    margin: 20px 0;
    box-shadow: 0 8px 24px rgba(74, 144, 226, 0.05);
}

.company-wrapper {
    display: flex;
    align-items: center;
    gap: 60px;
    flex-wrap: wrap;
    cursor: pointer;
    transition: transform 0.2s;
}

.company-wrapper:hover {
    transform: translateY(-4px);
}

.company-text {
    flex: 1.2;
}

.company-text h2 {
    font-size: 2.2rem;
    margin: 12px 0 20px;
}

.company-text p {
    color: #2C5F8A;
    line-height: 1.7;
    margin-bottom: 24px;
}

.company-features {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.company-features span {
    background: #E9F2FA;
    padding: 6px 14px;
    border-radius: 40px;
    font-size: 0.85rem;
    font-weight: 500;
}

.company-features i {
    color: #4A90E2;
    margin-right: 6px;
}

.company-image {
    flex: 0.8;
    border-radius: 36px;
    overflow: hidden;
    box-shadow: 0 20px 30px rgba(0, 0, 0, 0.05);
}

.company-image img {
    width: 100%;
    height: auto;
    display: block;
}

.learn-more {
    color: #4A90E2;
    font-weight: 600;
    margin-top: 16px;
}

/* 精选项目：5图悬浮互斥展开 */
.destinations-flex {
    display: flex;
    gap: 16px;
    justify-content: center;
    align-items: stretch;
    min-height: 380px;
}

.dest-card-expand {
    flex: 1;
    border-radius: 28px;
    overflow: hidden;
    background: white;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
    transition: flex 0.4s cubic-bezier(0.2, 0.9, 0.4, 1.1);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.card-img-expand {
    width: 100%;
    height: 260px;
    overflow: hidden;
}

.card-img-expand img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.dest-card-expand:hover {
    flex: 2.2;
}

.dest-card-expand:hover .card-img-expand img {
    transform: scale(1.02);
}

.card-desc {
    padding: 14px 12px;
    text-align: center;
    background: white;
    font-weight: 600;
    color: #1A3B5C;
}

.card-desc span {
    font-size: 0.75rem;
    font-weight: normal;
    color: #5D7F9E;
    display: block;
    margin-top: 4px;
}

/* 核心产业 - 左侧大卡片 + 右侧两个小卡片 */
.industries-showcase {
    display: flex;
    gap: 32px;
    align-items: stretch;
}

.industry-large {
    flex: 1.2;
    background: white;
    border-radius: 32px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.04);
}

.industry-large:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 35px rgba(74, 144, 226, 0.12);
}

.industry-large-img {
    height: 240px;
    overflow: hidden;
}

.industry-large-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.industry-large-content {
    padding: 24px;
}

.industry-large-content h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: #1A3B5C;
}

.industry-large-content p {
    color: #5D7F9E;
    line-height: 1.5;
    margin-bottom: 16px;
}

.industry-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.industry-tags span {
    background: #E9F2FA;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 500;
    color: #4A90E2;
}

.industries-small {
    flex: 0.8;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.industry-small-card {
    background: white;
    border-radius: 28px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.04);
    display: flex;
    flex-direction: column;
}

.industry-small-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 35px rgba(74, 144, 226, 0.12);
}

.industry-small-img {
    height: 160px;
    overflow: hidden;
}

.industry-small-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.industry-small-content {
    padding: 18px;
}

.industry-small-content h4 {
    font-size: 1.2rem;
    margin-bottom: 8px;
    color: #1A3B5C;
}

.industry-small-content p {
    color: #5D7F9E;
    font-size: 0.85rem;
    line-height: 1.4;
}

/* 产业投资合作 2x2 网格 + 标题居中 */
.investment-section {
    background: #FFFFFF;
    border-radius: 48px;
    margin: 20px 0;
}

/* 确保产业投资合作模块的标题区域三行文字居中 */
.investment-section .section-header {
    display: block;
    text-align: center;
}

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

.cooperation-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin: 48px 0;
}

.coop-card {
    background: #F8FCFE;
    border-radius: 28px;
    padding: 32px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    border: 1px solid #E1F0FE;
}

.coop-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(74, 144, 226, 0.1);
    border-color: #4A90E2;
}

.coop-card i {
    font-size: 2.5rem;
    color: #4A90E2;
    margin-bottom: 16px;
}

.coop-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: #1A3B5C;
}

.coop-card p {
    color: #5D7F9E;
    font-size: 0.85rem;
    line-height: 1.5;
}

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

/* 新闻资讯网格 */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.news-card {
    background: white;
    border-radius: 24px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s;
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.02);
    border: 1px solid #D9E8F5;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 14px 28px rgba(74, 144, 226, 0.1);
}

.news-img {
    height: 180px;
    overflow: hidden;
}

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

.news-info {
    padding: 20px;
}

.news-date {
    font-size: 0.75rem;
    color: #4A90E2;
    margin-bottom: 6px;
    display: block;
}

.news-info h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.read-more {
    color: #4A90E2;
    font-weight: 600;
    font-size: 0.8rem;
    margin-top: 8px;
    display: inline-block;
}

.loading-skeleton {
    display: flex;
    gap: 28px;
    width: 100%;
}

.skeleton-card {
    background: #E6F0FA;
    border-radius: 20px;
    height: 280px;
    flex: 1;
    animation: pulse 1.2s infinite;
}

@keyframes pulse {
    0% { opacity: 0.6; }
    50% { opacity: 1; }
    100% { opacity: 0.6; }
}

/* CTA 区域 */
.cta-section {
    background: #D9E8F5;
    padding: 60px 0;
    text-align: center;
    color: #1A3B5C;
}

.cta-content h3 {
    font-size: 2rem;
    margin-bottom: 16px;
}

/* 页脚样式 */
.site-footer {
    background: #1E4663;
    color: #D4E8FA;
    padding: 60px 0 30px;
}

.footer-main {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 320px;
}

.footer-logo {
    margin-bottom: 16px;
    color: white;
}

.footer-logo i,
.footer-logo span {
    color: white;
}

.social-icons {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}

.social-icons a {
    color: #B3D4F0;
    font-size: 1.3rem;
    transition: color 0.2s;
}

.social-icons a:hover {
    color: #FFD966;
}

.footer-links {
    display: flex;
    gap: 60px;
    flex-wrap: wrap;
}

.link-group h4 {
    color: white;
    margin-bottom: 18px;
    font-size: 1.05rem;
}

.link-group ul {
    list-style: none;
}

.link-group li {
    margin-bottom: 10px;
}

.link-group a {
    text-decoration: none;
    color: #C5E0F4;
    transition: color 0.2s;
}

.link-group a:hover {
    color: #FFD966;
}

.footer-bottom {
    border-top: 1px solid #2F6085;
    padding-top: 25px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    font-size: 0.75rem;
}

.footer-bottom-links a {
    color: #C5E0F4;
    text-decoration: none;
    margin-left: 25px;
}

.footer-bottom-links a:hover {
    color: #FFD966;
}

/* 响应式 */
@media (max-width: 1024px) {
    .main-nav {
        display: none;
    }
    .mobile-menu-btn {
        display: block;
    }
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .industries-showcase {
        flex-direction: column;
    }
    .cooperation-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 860px) {
    .destinations-flex {
        flex-wrap: wrap;
    }
    .dest-card-expand {
        min-width: 160px;
        flex: 1 1 auto;
    }
    .dest-card-expand:hover {
        flex: 2;
    }
}

@media (max-width: 768px) {
    .footer-main {
        flex-direction: column;
        gap: 30px;
    }
    .footer-links {
        gap: 30px;
        justify-content: space-between;
    }
    .footer-bottom {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }
    .footer-bottom-links a {
        margin: 0 12px;
    }
}

@media (max-width: 640px) {
    .news-grid {
        grid-template-columns: 1fr;
    }
    .hero-content h1 {
        font-size: 2.4rem;
    }
    .company-wrapper {
        flex-direction: column;
        text-align: center;
    }
    .company-features {
        justify-content: center;
    }
}
/* 固定头部（JS 备用方案） */
.site-header.fixed {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    animation: slideDown 0.3s ease;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
    }
    to {
        transform: translateY(0);
    }
}

/* 为避免内容突然跳动，给 body 添加一个占位 */
body.has-fixed-header {
    padding-top: 78px;  /* 大约等于 header 的高度，可调整 */
}

@media (max-width: 768px) {
    body.has-fixed-header {
        padding-top: 68px;
    }
}
/* ========= 轮播样式 ========= */
.hero-carousel-section {
    position: relative;
    width: 100%;
    height: 85vh;
    min-height: 500px;
    overflow: hidden;
}

.carousel-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.carousel-slides {
    position: relative;
    width: 100%;
    height: 100%;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.6s ease;
    object-fit: cover;
}

.carousel-slide.active {
    opacity: 1;
    z-index: 1;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.7);
}

.carousel-caption {
    position: absolute;
    bottom: 30%;
    left: 0;
    right: 0;
    text-align: center;
    color: white;
    z-index: 2;
    padding: 0 20px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.carousel-caption h2 {
    font-size: 3rem;
    margin-bottom: 10rem;
    font-weight: 700;
}

.carousel-caption p {
    font-size: 1.2rem;
    opacity: 0.9;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.3);
    color: white;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    padding: 10px 18px;
    border-radius: 50%;
    z-index: 10;
    transition: background 0.3s;
}

.carousel-btn:hover {
    background: rgba(74,144,226,0.7);
}

.prev {
    left: 20px;
}

.next {
    right: 20px;
}

.carousel-dots {
    position: absolute;
    bottom: 20px;
    left: 0;
    right: 0;
    text-align: center;
    z-index: 10;
}

.dot {
    display: inline-block;
    width: 12px;
    height: 12px;
    margin: 0 6px;
    background: rgba(255,255,255,0.5);
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.3s;
}

.dot.active {
    background: #4A90E2;
}

@media (max-width: 768px) {
    .carousel-caption h2 { font-size: 1.8rem; }
    .carousel-caption p { font-size: 0.9rem; }
    .carousel-btn { font-size: 1.2rem; padding: 6px 12px; }
}

/* ========= 精选项目图片高度增加一倍 ========= */
.card-img-expand {
    width: 100%;
    height: 520px;  /* 原来是 260px，增加一倍 */
    overflow: hidden;
}
@media (max-width: 860px) {
    .card-img-expand {
        height: 320px;  /* 移动端适当缩小，但仍比原来大 */
    }
}

/* ========= 核心产业右侧卡片改为左图右文 ========= */
.industries-small .industry-small-card {
    display: flex;
    flex-direction: row;
    align-items: stretch;
}

.industries-small .industry-small-img {
    width: 40%;
    height: auto;
    min-height: 160px;
}

.industries-small .industry-small-content {
    width: 60%;
    padding: 18px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

@media (max-width: 768px) {
    .industries-small .industry-small-card {
        flex-direction: column;
    }
    .industries-small .industry-small-img,
    .industries-small .industry-small-content {
        width: 100%;
    }
}