/* ===== 基础重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: system-ui, 'Microsoft YaHei', sans-serif;
}

body {
    color: #1a1a2e;
    background: #fff;
    scroll-behavior: smooth;
    line-height: 1.6;
    overflow-x: hidden;
}

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #4A90E2;
    border-radius: 6px;
}

#page-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, #4A90E2, #7B68EE, #4A90E2);
    z-index: 100000;
    transition: width .1s;
    box-shadow: 0 0 10px rgba(74, 144, 226, .5);
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    width: 92%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
}

@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }
}

/* ===== 按钮样式 - 完全透明白底 + 白字白边 ===== */
.btn {
    display: inline-block;
    padding: 12px 28px;
    background: transparent;          /* 透明背景 */
    color: #ffffff;                   /* 白色文字 */
    border-radius: 50px;
    font-weight: 500;
    transition: .3s;
    border: 2px solid #ffffff;       /* 白色边框 */
    cursor: pointer;
    box-shadow: none;                /* 移除所有阴影 */
    text-align: center;
    text-decoration: none;
    position: relative;
    /* 原伪元素（半透明白色涟漪）已删除，确保完全透明 */
}

/* 悬停时只保留上移效果，无任何背景/阴影变化 */
.btn:hover {
    transform: translateY(-3px);
    box-shadow: none;                /* 确保悬停也无阴影 */
    background: transparent;         /* 强制透明背景 */
}

/* 确保焦点、激活状态同样透明 */
.btn:focus,
.btn:active {
    background: transparent;
    box-shadow: none;
    outline: none;                   /* 可选：移除轮廓，不影响透明底 */
}

/* .btn-transparent 类：全透明 + 白边框白字 */
.btn-transparent {
    background: transparent !important;
    border: 2px solid #ffffff !important;
    color: #ffffff !important;
    box-shadow: none !important;
}

.btn-transparent:hover,
.btn-transparent:focus,
.btn-transparent:active {
    background: transparent !important;
    box-shadow: none !important;
}

/* .btn-outline 类：同样全透明（原悬停半透背景已移除） */
.btn-outline {
    background: transparent !important;
    border: 2px solid #ffffff !important;
    color: #ffffff !important;
    box-shadow: none !important;
}

.btn-outline:hover,
.btn-outline:focus,
.btn-outline:active {
    background: transparent !important;   /* 原 rgba(255,255,255,0.1) 已改为完全透明 */
    box-shadow: none !important;
}

/* ===== 模块通用样式 ===== */
.section {
    padding: 5rem 0;
    opacity: 0;
    transform: translateY(40px);
    transition: all .8s cubic-bezier(.25, .8, .25, 1);
}

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

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: clamp(1.8rem, 6vw, 2.8rem);
    margin-bottom: .8rem;
    background: linear-gradient(135deg, #ffffff, #ffffff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 700;
    display: inline-block;
    position: relative;
}

.section-title h2::after {
    content: '';
    position: absolute;
    width: 70px;
    height: 3px;
    background: linear-gradient(135deg, #4A90E2, #7B68EE);
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 4px;
}

.section-title p {
    color: #555;
    max-width: 700px;
    margin: 1rem auto 0;
}

/* ===== 头部导航栏样式 ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: transparent;
    z-index: 999;
    transition: all 0.3s ease;
    border-bottom: none;
}

.header.scrolled {
    background: #ffffff !important;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

/* Logo 区域 */
.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo img {
    height: 44px;
    width: auto;
    max-width: 180px;
    object-fit: contain;
}

.logo-text {
    font-size: 1.1rem;
    font-weight: 600;
}

.header:not(.scrolled) .logo-text {
    color: rgba(255, 255, 255, 0.9);
}

.header.scrolled .logo-text {
    color: #1a1a2e;
}

/* 中间导航 */
.nav-list {
    display: flex;
    gap: 2rem;
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-list a {
    font-weight: 500;
    font-size: 1rem;
    transition: color 0.2s;
    position: relative;
    padding: 6px 0;
}

.nav-list a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #4A90E2, #7B68EE);
    bottom: 0;
    left: 0;
    transition: width 0.3s;
}

.nav-list a:hover::after,
.nav-list a.active::after {
    width: 100%;
}

.header:not(.scrolled) .nav-list a {
    color: rgba(255, 255, 255, 0.9);
}

.header:not(.scrolled) .nav-list a:hover,
.header:not(.scrolled) .nav-list a.active {
    color: #ffffff;
}

.header.scrolled .nav-list a {
    color: #1a1a2e;
}

.header.scrolled .nav-list a:hover,
.header.scrolled .nav-list a.active {
    color: #4A90E2;
}

/* 右侧区域 */
.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

/* 下拉菜单容器 */
.nav-item-dropdown {
    position: relative;
}

/* 箭头指示器 */
.dropdown-toggle::after {
    content: ' ▼';
    font-size: 10px;
    transition: transform 0.3s;
}

.nav-item-dropdown:hover .dropdown-toggle::after {
    transform: rotate(180deg);
}

/* 下拉菜单 - 白底 */
.dropdown-menu {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    background: #ffffff;
    min-width: 150px;
    width: auto;
    padding: 8px 0;
    border-radius: 10px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 100;
    border: 1px solid rgba(0, 0, 0, 0.08);
}

.nav-item-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

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

.dropdown-menu li a {
    display: block;
    padding: 8px 16px;
    font-size: 0.85rem;
    color: #333;
    transition: all 0.2s;
    white-space: nowrap;
    text-align: left;
}

.dropdown-menu li a:hover {
    background: rgba(74, 144, 226, 0.1);
    color: #4A90E2;
}

.header:not(.scrolled) .dropdown-menu {
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.08);
}

.header:not(.scrolled) .dropdown-menu li a {
    color: #333;
}

.header:not(.scrolled) .dropdown-menu li a:hover {
    background: rgba(74, 144, 226, 0.1);
    color: #4A90E2;
}

.header.scrolled .dropdown-menu {
    background: #ffffff;
    border: 1px solid #eef2f8;
}

.header.scrolled .dropdown-menu li a {
    color: #1a1a2e;
}

.header.scrolled .dropdown-menu li a:hover {
    background: rgba(74, 144, 226, 0.1);
    color: #4A90E2;
}

/* 搜索框容器 */
.search-container {
    display: flex;
    align-items: center;
    position: relative;
}

.search-input-new {
    width: 180px;
    padding: 8px 36px 8px 16px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 40px;
    font-size: 0.85rem;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(5px);
    color: #fff;
    outline: none;
    transition: all 0.3s;
}

.search-input-new::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.search-input-new:focus {
    width: 220px;
    border-color: rgba(255, 255, 255, 0.8);
    background: rgba(255, 255, 255, 0.25);
}

.header.scrolled .search-input-new {
    border: 1px solid #e0e6ed;
    background: #f5f7fa;
    color: #1a1a2e;
}

.header.scrolled .search-input-new::placeholder {
    color: #999;
}

.header.scrolled .search-input-new:focus {
    border-color: #4A90E2;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.search-btn-new {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.search-icon-new {
    width: 16px;
    height: 16px;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.search-icon-new:hover {
    opacity: 1;
}

.header:not(.scrolled) .search-icon-new {
    filter: brightness(0) invert(1);
}

.header.scrolled .search-icon-new {
    filter: none;
}

/* 语言切换按钮 */
.lang-switch {
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    padding: 6px 12px;
    border-radius: 30px;
}

.header:not(.scrolled) .lang-switch {
    color: rgba(255, 255, 255, 0.9);
}

.header:not(.scrolled) .lang-switch:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.15);
}

.header.scrolled .lang-switch {
    color: #1a1a2e;
}

.header.scrolled .lang-switch:hover {
    color: #4A90E2;
    background: rgba(74, 144, 226, 0.08);
}

/* 移动端菜单 */
.mobile-menu {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

.header:not(.scrolled) .mobile-menu {
    color: white;
}

.header.scrolled .mobile-menu {
    color: #1a1a2e;
}

/* 响应式 */
@media (max-width: 992px) {
    .nav-list {
        gap: 1.5rem;
    }
    .logo-text {
        display: none;
    }
    .search-input-new {
        width: 140px;
    }
    .search-input-new:focus {
        width: 160px;
    }
}

@media (max-width: 768px) {
    .nav-list {
        display: none;
    }
    .mobile-menu {
        display: block;
    }
    .search-container {
        display: none;
    }
    .nav-right {
        gap: 12px;
    }
    .dropdown-menu {
        position: static;
        top: auto;
        min-width: auto;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        padding-left: 20px;
        margin-top: 5px;
        display: none;
        background: transparent !important;
        border: none;
    }
    .nav-item-dropdown:hover .dropdown-menu {
        display: block;
    }
    .dropdown-menu li a {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
    .header:not(.scrolled) .dropdown-menu li a {
        color: rgba(255, 255, 255, 0.8);
    }
    .header:not(.scrolled) .dropdown-menu li a:hover {
        background: rgba(255, 255, 255, 0.15);
        color: #fff;
    }
}

@media (max-width: 480px) {
    .logo img {
        height: 36px;
    }
    .lang-switch {
        font-size: 0.8rem;
        padding: 4px 8px;
    }
}

/* ===== Banner 模块 ===== */
.banner {
    height: 100vh;
    min-height: 580px;
    position: relative;
    display: flex;
    align-items: center;
    text-align: center;
    color: #fff;
    background: linear-gradient(145deg, #0a1928, #122c44);
}

.banner-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center 30%;
    background-repeat: no-repeat;
    z-index: 1;
}

.banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(10, 22, 40, 0.5), rgba(5, 15, 30, 0.7));
    z-index: 2;
}

.banner .container {
    position: relative;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.banner-logo {
    width: min(60%, 320px);
    height: auto;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.3));
    animation: floatLogo 3s ease-in-out infinite;
}

@keyframes floatLogo {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.banner .btns {
    display: flex;
    gap: 1.2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.banner-slogan {
    position: absolute;
    bottom: 25px;
    left: 0;
    right: 0;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: .75rem;
    letter-spacing: 6px;
    text-transform: uppercase;
    z-index: 10;
}

.banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(74, 144, 226, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 144, 226, .08) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
    z-index: 3;
    pointer-events: none;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

/* ===== 视频臻选模块 ===== */
.video-feature-section {
    padding: 80px 0;
    background: #fff;
    position: relative;
    overflow: hidden;
}

.video-feature-container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0;
    overflow: hidden;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
    padding: 0 24px;
}

.eyebrow {
    font-size: 13px;
    letter-spacing: 6px;
    text-transform: uppercase;
    color: #4A90E2;
    font-weight: 500;
    margin-bottom: 16px;
}

.video-section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 600;
    color: #1e2a3a;
}

.section-sub {
    font-size: 1rem;
    color: #5f6c80;
    margin-top: 16px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.showreel-swiper {
    width: 100%;
    overflow: visible;
    padding: 20px 0 60px 0;
}

.showreel-swiper .swiper-wrapper {
    transition-timing-function: linear !important;
}

.swiper-slide {
    width: auto;
    height: auto;
    margin-right: 6px !important;
}

.swiper-slide:last-child {
    margin-right: 0 !important;
}

.video-card {
    width: 360px;
    background: #fff;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 35px -10px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
    cursor: pointer;
    border: 1px solid rgba(0, 0, 0, 0.05);
    margin: 0;
}

.video-thumb {
    position: relative;
    width: 100%;
    aspect-ratio: 16/9;
    background: #0f1722;
    overflow: hidden;
}

.video-thumb video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 1.2s;
}

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

.play-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(3px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.video-card:hover .play-overlay {
    opacity: 1;
}

.play-icon {
    width: 70px;
    height: 70px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.play-icon svg {
    width: 32px;
    height: 32px;
    margin-left: 4px;
    fill: #1e2a3a;
}

.card-info {
    padding: 20px 20px 24px;
    text-align: center;
}

.card-info h3 {
    font-size: 1.35rem;
    font-weight: 600;
    color: #1a1a2e;
    margin-bottom: 8px;
    letter-spacing: -.3px;
}

.badge {
    background: rgba(74, 144, 226, 0.1);
    padding: 4px 12px;
    border-radius: 40px;
    font-size: .7rem;
    font-weight: 500;
    color: #4A90E2;
    display: inline-block;
}

.swiper-pagination {
    display: none;
}

@media (max-width: 1200px) {
    .video-card {
        width: 320px;
    }
    .swiper-slide {
        margin-right: 5px !important;
    }
}

@media (max-width: 768px) {
    .video-card {
        width: 280px;
    }
    .swiper-slide {
        margin-right: 4px !important;
    }
}

/* ===== 主营业务模块 ===== */
#service .container {
    max-width: 100%;
    width: 100%;
    padding: 0 2rem;
}

#service .adv-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    width: 100%;
}

#service .adv-card {
    padding: 2rem 1.5rem;
    background: #fff;
    border-right: 1px solid #eef2f8;
    border-bottom: 1px solid #eef2f8;
    transition: all 0.3s ease;
}

#service .adv-card:nth-child(4n) {
    border-right: none;
}

#service .adv-card-number {
    font-size: 2.8rem;
    font-weight: 700;
    color: rgba(74, 144, 226, 0.15);
    margin-bottom: 1.2rem;
    font-family: 'Arial', sans-serif;
}

#service .adv-card-title h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1a1a2e;
    margin-bottom: 0.3rem;
}

#service .adv-card-title span {
    font-size: 0.65rem;
    color: #999;
    letter-spacing: 1px;
}

#service .adv-card-tags {
    margin-top: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

#service .adv-card-tags span {
    font-size: 0.8rem;
    color: #555;
    display: block;
}

#service .adv-card:hover {
    background: #fafcff;
}

#service .adv-card:hover .adv-card-number {
    color: rgba(74, 144, 226, 0.3);
}

@media (max-width: 992px) {
    #service .adv-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    #service .adv-card:nth-child(2n) {
        border-right: none;
    }
    #service .adv-card:nth-child(odd) {
        border-right: 1px solid #eef2f8;
    }
}

@media (max-width: 640px) {
    #service .adv-grid {
        grid-template-columns: 1fr;
    }
    #service .adv-card {
        border-right: none;
    }
}

/* ===== 优秀案例模块 ===== */
.case-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.case-item {
    background: #fff;
    border-radius: 28px;
    transition: all .35s;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(74, 144, 226, 0.08);
    overflow: hidden;
    cursor: pointer;
    text-align: center;
}

.case-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 40px rgba(74, 144, 226, 0.12);
}

.case-item img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.case-info h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 1rem 1rem 0.5rem;
}

.case-info span {
    font-size: 0.85rem;
    color: #666;
    margin-bottom: 1.2rem;
    display: block;
}

/* ===== 新闻模块 ===== */
.news {
    background: #fff;
    padding: 60px 0;
}

.news .container {
    max-width: 100%;
    width: 100%;
    padding: 0 20px;
}

.news-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    margin-bottom: 48px;
}

.news-number {
    font-size: 48px;
    font-weight: 700;
    color: rgba(74, 144, 226, 0.15);
    font-family: 'Arial', sans-serif;
    line-height: 1;
    margin-bottom: 8px;
}

.news-title-group h2 {
    font-size: 32px;
    font-weight: 700;
    color: #1a1a2e;
    margin: 0 0 4px 0;
}

.news-title-group p {
    font-size: 14px;
    color: #999;
    letter-spacing: 2px;
    margin: 0;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}

.news-card {
    padding: 2rem 1.5rem;
    background: #fff;
    border-right: 1px solid #eef2f8;
    border-bottom: 1px solid #eef2f8;
    transition: all 0.3s ease;
    cursor: pointer;
}

.news-card:hover {
    background: #fafcff;
}

.news-card:nth-child(4n) {
    border-right: none;
}

.news-date {
    font-size: 14px;
    color: #4A90E2;
    font-weight: 500;
    margin-bottom: 16px;
    display: inline-block;
}

.news-title {
    font-size: 18px;
    font-weight: 700;
    color: #1a1a2e;
    line-height: 1.4;
    margin-bottom: 12px;
}

.news-description {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
    margin-bottom: 16px;
}

.news-viewmore {
    font-size: 14px;
    color: #4A90E2;
    font-weight: 500;
    text-decoration: none;
    display: inline-block;
}

.news-footer {
    text-align: center;
    margin-top: 40px;
}

.news-more-link {
    display: inline-block;
    padding: 12px 32px;
    border: 1px solid #e0e6ed;
    border-radius: 40px;
    font-size: 14px;
    color: #666;
    text-decoration: none;
    transition: all 0.3s;
}

.news-more-link:hover {
    background: linear-gradient(135deg, #4A90E2, #7B68EE);
    color: #fff;
    border-color: transparent;
}

@media (max-width: 1100px) {
    .news-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .news-card:nth-child(4n) {
        border-right: 1px solid #eef2f8;
    }
    .news-card:nth-child(3n) {
        border-right: none;
    }
}

@media (max-width: 800px) {
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .news-card:nth-child(3n) {
        border-right: 1px solid #eef2f8;
    }
    .news-card:nth-child(2n) {
        border-right: none;
    }
}

@media (max-width: 550px) {
    .news-grid {
        grid-template-columns: 1fr;
    }
    .news-card {
        border-right: none;
        padding: 1.5rem 1rem;
    }
    .news-title {
        font-size: 16px;
    }
    .news-description {
        font-size: 13px;
    }
}

@media (max-width: 768px) {
    .news {
        padding: 40px 0;
    }
    .news-number {
        font-size: 36px;
    }
    .news-title-group h2 {
        font-size: 24px;
    }
}

/* ===== 服务标准卡片 ===== */
.service-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
}

.service-card {
    background: #fff;
    border-radius: 24px;
    padding: 24px;
    text-align: center;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
    transition: .2s;
    border: 1px solid #eef2f8;
}

.service-card h3 {
    color: #1a1a2e;
    font-size: 1.2rem;
    font-weight: 600;
    margin: 0.8rem 0 0.5rem;
}

.service-card p {
    color: #555;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* ===== 我们的优势模块 ===== */
.adv-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
}

.adv-item {
    background: #fff;
    border-radius: 28px;
    transition: all .35s;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(74, 144, 226, 0.08);
    overflow: hidden;
    cursor: pointer;
    text-align: center;
}

.adv-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 40px rgba(74, 144, 226, 0.12);
}

.adv-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.adv-item h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 1rem 0 0.5rem;
}

.adv-item p {
    color: #555;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* ===== 旗下品牌模块 ===== */
.four-brands-section {
    background: #fff;
    position: relative;
    border-top: 1px solid #f0f2f8;
    border-bottom: 1px solid #f0f2f8;
}

.brand-cards-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    margin: 1.5rem 0 2rem;
}

.brand-item {
    position: relative;
    width: 220px;
    background: #fff;
    border-radius: 32px;
    padding: 1.8rem 1rem;
    transition: all .35s;
    cursor: pointer;
    text-align: center;
    border: 1px solid rgba(74, 144, 226, .12);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.02);
}

.brand-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 35px -10px rgba(74, 144, 226, .2);
    border-color: rgba(74, 144, 226, .3);
    background: #fefefe;
}

.brand-avatar-square {
    width: 100%;
    aspect-ratio: 1;
    margin: 0 auto 1rem;
    overflow: hidden;
    background: #f0f2f8;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.04);
    transition: all .3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.brand-item:hover .brand-avatar-square {
    transform: scale(1.02);
    box-shadow: 0 12px 24px rgba(74, 144, 226, .12);
}

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

.brand-name-text {
    font-size: 1.2rem;
    font-weight: 700;
    color: #1e2f44;
    margin: .5rem 0 .25rem;
    letter-spacing: -.3px;
}

.social-icons-drop {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .4s, opacity .3s, margin .2s;
    background: rgba(255, 255, 255, .96);
    border-radius: 28px;
    margin-top: 0;
    padding: 0 .5rem;
}

.brand-item:hover .social-icons-drop {
    max-height: 140px;
    opacity: 1;
    margin-top: 1rem;
    padding: .5rem .5rem .8rem;
}

.social-icons-row {
    display: flex;
    justify-content: center;
    gap: .8rem;
    flex-wrap: wrap;
    margin-bottom: 6px;
}

.social-icons-row:last-child {
    margin-bottom: 0;
}

.social-circle-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    background: #f0f2f8;
    border-radius: 60px;
    transition: all .2s;
    border: 1px solid rgba(0, 0, 0, .04);
    overflow: hidden;
}

.social-circle-link:hover {
    transform: translateY(-4px) scale(1.08);
    background: #4A90E2;
    box-shadow: 0 6px 12px rgba(74, 144, 226, .25);
}

.social-circle-link img {
    width: 22px;
    height: 22px;
    object-fit: contain;
}

@media (max-width: 860px) {
    .brand }
/* ===== 主营业务模块 - 4列横向，图片高度适中 ===== */

#service {
    padding: 5rem 0;
    background: #fff;
}

#service .container {
    max-width: 1800px;
    margin: 0 auto;
    padding: 0 2rem;
}

#service .section-title {
    margin-bottom: 4rem;
}

#service .section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
}

#service .section-title p {
    font-size: 1.1rem;
    color: #777;
}

#service .adv-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

#service .adv-item {
    background: #fff;
    border-radius: 24px;
    transition: all 0.4s ease;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(74, 144, 226, 0.08);
    overflow: hidden;
    cursor: pointer;
    text-align: center;
}

#service .adv-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 45px rgba(74, 144, 226, 0.12);
}

#service .adv-item img {
    width: 100%;
    height: 260px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

#service .adv-item:hover img {
    transform: scale(1.03);
}

#service .adv-item h4 {
    font-size: 1.4rem;
    font-weight: 700;
    color: #1a1a2e;
    margin: 1rem 1rem 0.3rem;
}

#service .adv-item p {
    font-size: 0.95rem;
    color: #666;
    line-height: 1.6;
    margin: 0 1rem 1.2rem;
}

/* 超大屏幕 */
@media (min-width: 1600px) {
    #service .container {
        max-width: 2000px;
    }
    #service .adv-list {
        gap: 2.5rem;
    }
    #service .adv-item img {
        height: 280px;
    }
    #service .adv-item h4 {
        font-size: 1.5rem;
    }
}

/* 平板 - 2列 */
@media (max-width: 1100px) {
    #service .adv-list {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.8rem;
    }
    #service .adv-item img {
        height: 240px;
    }
    #service .adv-item h4 {
        font-size: 1.3rem;
    }
}

/* 手机 - 1列 */
@media (max-width: 640px) {
    #service .container {
        padding: 0 1.5rem;
    }
    #service .adv-list {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    #service .section-title h2 {
        font-size: 2rem;
    }
    #service .adv-item img {
        height: 200px;
    }
    #service .adv-item h4 {
        font-size: 1.2rem;
    }
    #service .adv-item p {
        font-size: 0.85rem;
    }
}

/* ===== 优秀案例模块 - 与主营业务模块一致 ===== */

.cases {
    background: #fff;
}

.cases .container {
    max-width: 1800px;
    margin: 0 auto;
    padding: 0 2rem;
}

.cases .section-title {
    margin-bottom: 4rem;
}

.cases .section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
}

.cases .section-title p {
    font-size: 1.1rem;
    color: #777;
}

/* 4列网格布局 */
.case-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
}

/* 案例卡片 */
.case-item {
    background: #fff;
    border-radius: 24px;
    transition: all 0.4s ease;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(74, 144, 226, 0.08);
    overflow: hidden;
    cursor: pointer;
    text-align: center;
}

.case-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 45px rgba(74, 144, 226, 0.12);
}

/* 图片容器 */
.case-img {
    position: relative;
    overflow: hidden;
}

.case-img img {
    width: 100%;
    height: 260px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.case-item:hover .case-img img {
    transform: scale(1.03);
}

/* 图片遮罩层 */
.case-overlay {
    position: absolute;
    inset: 0;
    background: rgba(74, 144, 226, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.case-item:hover .case-overlay {
    opacity: 1;
}

.case-overlay span {
    color: #fff;
    font-size: 1rem;
    font-weight: 500;
    padding: 8px 20px;
    border: 2px solid #fff;
    border-radius: 40px;
    transition: all 0.3s;
}

.case-overlay span:hover {
    background: #fff;
    color: #4A90E2;
}

/* 卡片信息 */
.case-info {
    padding: 1.2rem 1rem 1.5rem;
}

.case-info h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1a1a2e;
    margin-bottom: 0.5rem;
}

.case-info span {
    font-size: 0.85rem;
    color: #888;
}
.case-img img {
    width: 452px !important;
    height: 280px !important;
    object-fit: cover !important;
    display: block !important;
}

/* 查看更多按钮 */
.btn-outline-news {
    display: inline-block;
    background: transparent;
    border: 1px solid #4A90E2;
    color: #4A90E2;
    border-radius: 40px;
    padding: 10px 28px;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
}
.btn-outline-news:hover {
    background: rgba(74, 144, 226, 0.1);
    transform: translateY(-2px);
}

/* 超大屏幕 */
@media (min-width: 1600px) {
    .cases .container {
        max-width: 2000px;
    }
    .case-grid {
        gap: 2.5rem;
    }
    .case-img img {
        height: 280px;
    }
    .case-info h4 {
        font-size: 1.3rem;
    }
}

/* 平板 - 2列 */
@media (max-width: 1100px) {
    .case-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    .case-img img {
        height: 240px;
    }
}

/* 手机 - 1列 */
@media (max-width: 640px) {
    .cases .container {
        padding: 0 1.5rem;
    }
    .case-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    .cases .section-title h2 {
        font-size: 2rem;
    }
    .case-img img {
        height: 200px;
    }
    .case-info h4 {
        font-size: 1.1rem;
    }
}


/* ===== 新闻模块 - 三层有层次感弹幕滑动 ===== */

.news {
    background: #ffffff;
    padding: 60px 0;
    overflow: hidden;
}

.news .container {
    max-width: 100%;
    width: 100%;
    padding: 0;
}

.news .section-title {
    max-width: 1200px;
    margin: 0 auto 2rem auto;
    padding: 0 2rem;
    text-align: center;
}

.news .section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 0.5rem;
    position: relative;
    display: inline-block;
}

.news .section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #4A90E2, #7B68EE);
    border-radius: 3px;
}

.news .section-title p {
    font-size: 1rem;
    color: #999;
    letter-spacing: 2px;
    margin-top: 0.5rem;
}

/* 三层弹幕容器 */
.news-marquee-layered {
    width: 100%;
    position: relative;
    overflow: hidden;
}

/* 每一层 - 添加了底部间距 */
.marquee-layer {
    width: 100%;
    overflow: hidden;
    padding: 12px 0;
    position: relative;
    margin-bottom: 24px;
}

/* 最后一层不需要底部间距 */
.marquee-layer:last-child {
    margin-bottom: 0;
}

/* 不同层的背景微调 - 全部白色 */
.layer-1 {
    background: #ffffff;
    border-top: 1px solid rgba(74, 144, 226, 0.08);
    border-bottom: 1px solid rgba(74, 144, 226, 0.08);
}

.layer-2 {
    background: #ffffff;
}

.layer-3 {
    background: #ffffff;
}

/* 左右渐变遮罩 - 白色渐变 */
.marquee-layer::before,
.marquee-layer::after {
    content: '';
    position: absolute;
    top: 0;
    width: 100px;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.marquee-layer::before {
    left: 0;
    background: linear-gradient(to right, #ffffff, transparent);
}

.marquee-layer::after {
    right: 0;
    background: linear-gradient(to left, #ffffff, transparent);
}

/* 滚动轨道 */
.marquee-track {
    display: flex;
    gap: 24px;
    width: fit-content;
}

/* 三层不同速度的动画 */
.layer-1 .marquee-track {
    animation: marqueeSlowest 40s linear infinite;
}

.layer-2 .marquee-track {
    animation: marqueeSlower 55s linear infinite;
}

.layer-3 .marquee-track {
    animation: marqueeSlow 70s linear infinite;
}

/* 动画定义 */
@keyframes marqueeSlowest {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

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

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

/* 条状新闻卡片 */
.marquee-news-card {
    display: flex;
    align-items: center;
    gap: 16px;
    background: #fff;
    padding: 10px 22px;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    border: 1px solid rgba(74, 144, 226, 0.1);
    white-space: nowrap;
    flex-shrink: 0;
}

/* 不同层卡片微调 */
.layer-1 .marquee-news-card {
    background: #fff;
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.08);
}

.layer-2 .marquee-news-card {
    background: rgba(255, 255, 255, 0.95);
    transform: scale(0.98);
}

.layer-3 .marquee-news-card {
    background: rgba(255, 255, 255, 0.9);
    transform: scale(0.96);
    opacity: 0.85;
}

.marquee-news-card:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 20px rgba(74, 144, 226, 0.15);
    border-color: rgba(74, 144, 226, 0.3);
    background: #fff;
}

/* 日期标签 */
.marquee-news-date {
    font-size: 0.75rem;
    color: #4A90E2;
    font-weight: 500;
    background: rgba(74, 144, 226, 0.1);
    padding: 4px 12px;
    border-radius: 30px;
    display: inline-block;
    white-space: nowrap;
}

/* 标题 */
.marquee-news-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: #1a1a2e;
    white-space: nowrap;
}

/* 描述 */
.marquee-news-desc {
    font-size: 0.85rem;
    color: #888;
    white-space: nowrap;
}

/* 阅读更多 */
.marquee-news-viewmore {
    font-size: 0.75rem;
    color: #4A90E2;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    white-space: nowrap;
    transition: gap 0.3s;
}

.marquee-news-card:hover .marquee-news-viewmore {
    gap: 8px;
}

/* 响应式 */
@media (max-width: 768px) {
    .news .section-title h2 {
        font-size: 1.8rem;
    }

    .marquee-news-card {
        padding: 8px 16px;
        gap: 10px;
    }

    .marquee-news-title {
        font-size: 0.85rem;
    }

    .marquee-news-desc {
        font-size: 0.75rem;
        display: none;
    }

    .marquee-news-date {
        font-size: 0.7rem;
        padding: 3px 10px;
    }

    .marquee-layer::before,
    .marquee-layer::after {
        width: 50px;
    }

    .marquee-layer {
        margin-bottom: 16px;
    }
}

/* ===== 我们的优势 - 与主营业务模块布局一致，仅放大尺寸 ===== */
#advantage {
    padding: 5rem 0;
    background: #fff;
}

#advantage .container {
    max-width: 1800px;
    margin: 0 auto;
    padding: 0 2rem;
}

#advantage .section-title {
    margin-bottom: 4rem;
    text-align: center;
}

#advantage .section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
}

#advantage .section-title p {
    font-size: 1.1rem;
    color: #777;
}

#advantage .adv-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

#advantage .adv-item {
    background: #fff;
    border-radius: 24px;
    transition: all 0.4s ease;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(74, 144, 226, 0.08);
    overflow: hidden;
    cursor: pointer;
    text-align: center;
}

#advantage .adv-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 45px rgba(74, 144, 226, 0.12);
}

#advantage .adv-item img {
    width: 100%;
    height: 280px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

#advantage .adv-item:hover img {
    transform: scale(1.03);
}

#advantage .adv-item h4 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1a1a2e;
    margin: 1rem 1rem 0.5rem;
}

#advantage .adv-item p {
    font-size: 1rem;
    color: #666;
    line-height: 1.5;
    margin: 0 1rem 1.2rem;
}

@media (min-width: 1600px) {
    #advantage .container {
        max-width: 2000px;
    }
    #advantage .adv-list {
        gap: 2.5rem;
    }
    #advantage .adv-item img {
        height: 280px;
    }
    #advantage .adv-item h4 {
        font-size: 1.6rem;
    }
}

@media (max-width: 1100px) {
    #advantage .adv-list {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.8rem;
    }
    #advantage .adv-item img {
        height: 240px;
    }
    #advantage .adv-item h4 {
        font-size: 1.3rem;
    }
}

@media (max-width: 640px) {
    #advantage .container {
        padding: 0 1.5rem;
    }
    #advantage .adv-list {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    #advantage .section-title h2 {
        font-size: 2rem;
    }
    #advantage .adv-item img {
        height: 200px;
    }
    #advantage .adv-item h4 {
        font-size: 1.2rem;
    }
    #advantage .adv-item p {
        font-size: 0.85rem;
    }
}

/* 拉近视频与主营业务的距离 */
.video-feature-section {
    margin-bottom: 0;
    padding-bottom: 20px;
}
#service {
    margin-top: 0;
    padding-top: 20px;
}

/* ===== 新闻详情弹窗 - 紧凑区域版（仅保留此一份） ===== */
.news-detail-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 100000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

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

.news-detail-container {
    background: #fff;
    border-radius: 28px;
    max-width: 520px;
    width: 85%;
    max-height: 80vh;
    overflow-y: auto;
    animation: modalFadeIn 0.3s ease;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.news-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 20px;
    border-bottom: 1px solid #eef2f8;
}

.news-detail-header h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #1a1a2e;
    margin: 0;
    padding-right: 16px;
    line-height: 1.3;
}

.news-detail-close {
    background: #f0f2f5;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    color: #666;
    flex-shrink: 0;
}

.news-detail-close:hover {
    background: #4A90E2;
    color: white;
    transform: scale(1.05);
}

.news-detail-video {
    position: relative;
    width: 100%;
    background: #000;
}

.news-detail-video video {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    display: block;
}

.news-detail-content {
    padding: 20px 24px 24px;
}

.news-detail-date {
    font-size: 0.8rem;
    color: #4A90E2;
    font-weight: 500;
    margin-bottom: 12px;
}

.news-detail-desc {
    font-size: 0.9rem;
    line-height: 1.65;
    color: #333;
}

.news-detail-container::-webkit-scrollbar {
    width: 4px;
}

.news-detail-container::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.news-detail-container::-webkit-scrollbar-thumb {
    background: #4A90E2;
    border-radius: 4px;
}

@media (max-width: 640px) {
    .news-detail-container {
        width: 92%;
        max-height: 85vh;
    }
    .news-detail-header h3 {
        font-size: 1.1rem;
    }
    .news-detail-content {
        padding: 16px;
    }
}

/* 让两栏布局并排，并在手机上堆叠 */
#contact .contact-grid {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

#contact .contact-info {
    flex: 1;
    background: #fff;
    border-radius: 28px;
    padding: 2rem;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.05);
}

#contact .contact-form-card {
    flex: 1;
    padding: 2rem;
    background: #fff;
    border-radius: 28px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.05);
}

/* 地图容器样式 */
#amapContainer {
    width: 100%;
    height: 250px;          /* 你可以调整地图的高度 */
    margin-top: 20px;
    border-radius: 16px;
    overflow: hidden;
}

/* 响应式调整 */
@media (max-width: 768px) {
    #contact .contact-grid {
        flex-direction: column;
    }
}
/* 强制宽度为 1930px，高度自动（不强制一致） */
.module-inner,
.section-title,
.news-marquee-layered,
.brand-cards-grid {
    width: 1930px;           /* 固定宽度 */
    max-width: 100%;         /* 在小屏幕上自动收缩，避免溢出 */
    margin-left: auto;
    margin-right: auto;
    /* 不设置 height，让高度由内容撑开 */
    box-sizing: border-box;
}