/* 全局样式重置与基础设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #003d7a;
    --primary-dark: #002b57;
    --primary-light: #e8eef6;
    --secondary-color: #007a3d;
    --secondary-dark: #005a2b;
    --accent-color: #e87722;
    --text-dark: #1c1c1c;
    --text-body: #3a3a3a;
    --text-light: #6b6b6b;
    --text-muted: #999999;
    --bg-light: #f5f6f8;
    --bg-white: #ffffff;
    --border-color: #d9dce1;
    --border-light: #eef0f3;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1), 0 4px 8px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.12), 0 8px 16px rgba(0, 0, 0, 0.06);
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.7;
    color: var(--text-body);
    background-color: var(--bg-white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
}

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

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

ul {
    list-style: none;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
    text-decoration: none;
    letter-spacing: 0.3px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 61, 122, 0.3);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
}

.btn-secondary:hover {
    background-color: var(--secondary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 122, 61, 0.3);
}

.btn-white {
    background-color: white;
    color: var(--primary-color);
    border-color: white;
}

.btn-white:hover {
    background-color: var(--bg-light);
    transform: translateY(-1px);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
}

.btn-outline-white {
    background-color: transparent;
    color: white;
    border-color: white;
}

.btn-outline-white:hover {
    background-color: white;
    color: var(--primary-color);
}

.btn-lg {
    padding: 16px 40px;
    font-size: 16px;
}

.btn-sm {
    padding: 8px 20px;
    font-size: 13px;
}

.btn-block {
    display: block;
    width: 100%;
}

/* 顶部公告栏 */
.top-banner {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 10px 0;
    position: relative;
    animation: slideDown 0.5s ease-out;
}

.top-banner .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-banner p {
    margin: 0;
    font-size: 15px;
    flex: 1;
    text-align: center;
}

.close-btn {
    background: transparent;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
    padding: 0 10px;
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.close-btn:hover {
    opacity: 1;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* 导航栏 */
.main-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: white;
    box-shadow: 0 1px 0 var(--border-light);
    transition: all var(--transition-normal);
}

.index-1 {
    height: 44px;
    width: auto;
}

.main-header.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo a {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
}

.logo span {
    color: var(--secondary-color);
}

.nav-menu {
    display: flex;
    gap: 28px;
    align-items: center;
}

.nav-mobile-contact {
    display: none;
}

.nav-item {
    position: relative;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-dark);
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: color var(--transition-fast);
    letter-spacing: 0.2px;
}

.nav-link:hover {
    color: var(--primary-color);
}

.arrow {
    font-size: 10px;
    transition: transform var(--transition-fast);
}

.dropdown:hover .arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: white;
    min-width: 230px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    margin-top: 12px;
    padding: 8px 0;
}

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

.dropdown-menu li a {
    display: block;
    padding: 10px 24px;
    color: var(--text-body);
    font-size: 14px;
    transition: all var(--transition-fast);
}

.dropdown-menu li a:hover {
    background-color: var(--primary-light);
    color: var(--primary-color);
    padding-left: 28px;
}

.mega-menu {
    min-width: 920px;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
}

.mega-menu-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
    padding: 28px;
}

.menu-column h4 {
    font-size: 13px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.menu-column ul li a {
    padding: 7px 0;
    font-size: 14px;
    color: var(--text-light);
}

.menu-column ul li a:hover {
    color: var(--primary-color);
    padding-left: 6px;
}

.menu-featured {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: var(--radius-md);
    padding: 10px;
    color: white;
}

.menu-featured img {
    width: 100%;
    border-radius: var(--radius-sm);
    margin-bottom: 14px;
}

.menu-featured h5 {
    font-size: 17px;
    margin-bottom: 8px;
    font-weight: 600;
}

.menu-featured p {
    font-size: 13px;
    line-height: 1.6;
    margin-bottom: 14px;
    opacity: 0.9;
}

.menu-featured .btn-sm {
    background-color: white;
    color: var(--primary-color);
    border-color: white;
}

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

.search-box {
    position: relative;
    display: flex;
    align-items: center;
    border: 1px solid var(--border-color);
    border-radius: 24px;
    overflow: hidden;
    background: var(--bg-light);
}

.search-box input {
    border: none;
    outline: none;
    padding: 8px 15px;
    background: transparent;
    width: 180px;
    font-size: 14px;
}

.search-box button {
    background: transparent;
    border: none;
    padding: 8px 12px;
    cursor: pointer;
    font-size: 16px;
}

.language-selector {
    padding: 7px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: white;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-body);
}

.mobile-menu-toggle {
    display: none;
    background: transparent;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--text-dark);
}

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

.search-toggle-btn {
    background: transparent;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: var(--text-light);
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-icon-img {
    width: 18px;
    height: 18px;
    object-fit: contain;
    display: block;
}

.search-toggle-btn:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

.search-container {
    position: relative;
}

.mobile-search-toggle {
    display: none;
    background: transparent;
    border: none;
    font-size: 22px;
    cursor: pointer;
    color: var(--text-dark);
    padding: 5px;
    display: none;
    align-items: center;
    justify-content: center;
}

.mobile-search-toggle .search-icon-img {
    width: 22px;
    height: 22px;
    object-fit: contain;
    display: block;
}

/* 英雄区域（Hero Section）*/
.hero-section {
    position: relative;
    height: 600px;
    overflow: hidden;
}

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

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity var(--transition-slow);
    display: flex;
    align-items: center;
}

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

.slide-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-content {
    color: white;
    z-index: 2;
    position: relative;
}

.hero-content h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
    letter-spacing: -0.5px;
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 36px;
    opacity: 0.92;
    line-height: 1.7;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-buttons-row {
    display: flex;
    gap: 30px;
    align-items: center;
    flex-wrap: nowrap;
}

@media (max-width: 768px) {
    .hero-buttons-row {
        flex-direction: column;
        gap: 15px;
    }
}

.slider-controls {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 20px;
    z-index: 10;
}

.slider-prev,
.slider-next {
    background: rgba(255, 255, 255, 0.3);
    border: 2px solid white;
    color: white;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    position: relative;
}

.slider-prev::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    border-left: 2px solid white;
    border-bottom: 2px solid white;
    transform: rotate(45deg);
    margin-left: 3px;
}

.slider-next::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    border-right: 2px solid white;
    border-top: 2px solid white;
    transform: rotate(45deg);
    margin-right: 3px;
}

.slider-prev:hover,
.slider-next:hover {
    background: white;
}

.slider-prev:hover::before {
    border-left-color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.slider-next:hover::before {
    border-right-color: var(--primary-color);
    border-top-color: var(--primary-color);
}

.slider-dots {
    display: flex;
    gap: 10px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dot.active,
.dot:hover {
    background: white;
    transform: scale(1.2);
}

/* 快速访问卡片区域 */
.quick-access-section {
    padding: 100px 0;
    background: var(--bg-light);
    margin-top: 80px;
}

.quick-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-top: 0;
    position: relative;
    z-index: 10;
}

.quick-card {
    background: white;
    padding: 0;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    position: relative;
    transition: all var(--transition-normal);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.quick-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.quick-card.featured {
    border: 2px solid var(--primary-color);
}

.card-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--accent-color);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 2;
}

.card-icon {
    font-size: 48px;
    margin-bottom: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.card-icon img {
    width: 100%;
    height: auto;
    aspect-ratio: 16/9;
    object-fit: cover;
    border-radius: 0;
    box-shadow: none;
    display: block;
}

.quick-card h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-dark);
    padding: 0 20px;
    margin-top: 18px;
}

.quick-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.65;
    margin-bottom: 14px;
    padding: 0 20px;
}

.card-link {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: gap var(--transition-fast);
    margin-top: auto;
    padding: 0 20px 20px;
}

.card-link:hover {
    gap: 10px;
}

.tooltip {
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-dark);
    color: white;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 13px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: 100;
}

.tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--text-dark);
}

.quick-card:hover .tooltip {
    opacity: 1;
    visibility: visible;
    bottom: calc(100% + 15px);
}

/* 服务展示区域 */
.services-section {
    padding: 90px 0;
    background: white;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-header h2 {
    font-size: 38px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 14px;
    letter-spacing: -0.3px;
}

.section-header p {
    font-size: 17px;
    color: var(--text-light);
    max-width: 620px;
    margin: 0 auto;
    line-height: 1.7;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 28px;
    margin-bottom: 56px;
}

.service-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
}

.service-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: transparent;
}

.service-image {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.service-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.service-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 61, 122, 0.88);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.service-card:hover .service-overlay {
    opacity: 1;
}

.service-content {
    padding: 28px;
}

.service-content h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.service-list {
    list-style: none;
}

.service-list li {
    padding: 7px 0;
    padding-left: 22px;
    position: relative;
    color: var(--text-light);
    font-size: 14px;
}

.service-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: 700;
}

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

/* 数据统计区域 */
.stats-section {
    padding: 80px 0;
    background: linear-gradient(135deg, rgba(0, 61, 122, 0.92) 0%, rgba(0, 43, 87, 0.92) 100%), url('../images/ban-9.jpg') center/cover no-repeat;
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 40px;
    text-align: center;
}

.stat-item {
    padding: 24px;
}

.stat-number {
    font-size: 44px;
    font-weight: 800;
    margin-bottom: 8px;
    line-height: 1.2;
    letter-spacing: -0.5px;
}

.stat-label {
    font-size: 15px;
    opacity: 0.85;
    font-weight: 500;
    letter-spacing: 0.3px;
}

/* 新闻动态区域 */
.news-section {
    padding: 90px 0;
    background: var(--bg-light);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 44px;
}

.section-header h2 {
    font-size: 34px;
    font-weight: 700;
    color: var(--text-dark);
    margin: 0;
    letter-spacing: -0.3px;
}

.section-header .view-all {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 15px;
    transition: color var(--transition-fast);
}

.view-all:hover {
    color: var(--primary-dark);
}

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

.news-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.news-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.news-image {
    position: relative;
    height: 170px;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.news-category {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--primary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.news-content {
    padding: 20px;
}

.news-date {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 8px;
    font-weight: 500;
    letter-spacing: 0.3px;
}

.news-content h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-dark);
    line-height: 1.45;
    transition: color var(--transition-fast);
}

.news-content h3:hover {
    color: var(--primary-color);
}

.news-content p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.65;
    margin-bottom: 14px;
}

.read-more {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 13px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: gap var(--transition-fast);
}

.read-more:hover {
    gap: 9px;
}

/* 视频区域 */
.video-section {
    padding: 90px 0;
    background: white;
}

.video-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 48px;
    align-items: center;
}

.video-placeholder {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 16 / 9;
    background: #000;
    cursor: pointer;
}

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

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.95);
    border: none;
    font-size: 24px;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.play-button:hover {
    transform: translate(-50%, -50%) scale(1.08);
    background: var(--primary-color);
    color: white;
}

.video-info h3 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--text-dark);
}

.video-info p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.75;
    margin-bottom: 24px;
}

/* CTA 行动召唤区域 */
.cta-section {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(0, 61, 122, 0.9) 0%, rgba(0, 43, 87, 0.9) 100%), url('../images/ban-10.jpg') center/cover no-repeat;
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 18px;
    letter-spacing: -0.3px;
}

.cta-content p {
    font-size: 18px;
    margin-bottom: 36px;
    opacity: 0.9;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* 页脚 */
.main-footer {
    background: #1c1c1c;
    color: white;
}

.footer-top {
    padding: 64px 0 44px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 44px;
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 20px;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.footer-col p {
    font-size: 14px;
    line-height: 1.75;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
}

.social-links {
    display: flex;
    gap: 10px;
}

.social-links a {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    transition: all var(--transition-fast);
}

.footer-col ul li a:hover {
    color: white;
    padding-left: 4px;
}

.contact-email a {
    color: var(--secondary-color);
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-fast);
    display: inline-block;
    margin-top: 6px;
}

.contact-email a:hover {
    color: white;
    text-decoration: underline;
}

.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.newsletter-form input {
    padding: 11px 16px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.06);
    color: white;
    font-size: 14px;
}

.newsletter-form input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.newsletter-form button {
    padding: 11px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 24px 0;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.55);
}

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

.legal-links a {
    color: rgba(255, 255, 255, 0.55);
    font-size: 13px;
}

.legal-links a:hover {
    color: rgba(255, 255, 255, 0.85);
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: white;
    border: 1px solid var(--border-color);
    color: var(--primary-color);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    box-shadow: var(--shadow-md);
}

.back-to-top::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    border-left: 2px solid var(--primary-color);
    border-top: 2px solid var(--primary-color);
    transform: rotate(45deg);
    margin-top: 3px;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
    border-color: var(--primary-color);
}

.back-to-top:hover::before {
    border-left-color: white;
    border-top-color: white;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .nav-menu {
        gap: 20px;
    }

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

    .menu-featured {
        grid-column: 1 / -1;
    }

    .hero-content h1 {
        font-size: 44px;
    }

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

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


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

    .video-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .top-banner p {
        font-size: 13px;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .mobile-menu-close {
        display: flex;
        justify-content: flex-end;
        padding: 10px 0;
        border-bottom: 1px solid var(--border-color);
    }

    .mobile-menu-close button {
        background: transparent;
        border: none;
        font-size: 28px;
        cursor: pointer;
        color: var(--text-dark);
        padding: 5px 10px;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-lg);
        transform: translateX(100%);
        transition: transform 0.3s ease;
        gap: 0;
        overflow-y: auto;
        z-index: 1001;
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-item {
        width: 100%;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-link {
        padding: 15px 0;
        justify-content: space-between;
    }

    .dropdown-toggle::after {
        content: "▾";
        font-size: 12px;
        margin-left: 6px;
        transition: transform 0.2s ease;
    }

    .dropdown.active .dropdown-toggle::after {
        transform: rotate(180deg);
    }

    .dropdown-menu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        border: none;
        border-radius: 0;
        background: white;
        padding: 0 0 0 20px;
        display: none;
        min-width: 100%;
        margin-top: 0;
        transition: none;
    }

    .dropdown:hover .dropdown-menu {
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
    }

    .dropdown.active .dropdown-menu {
        display: block;
        opacity: 1;
        visibility: visible;
        transform: none;
    }

    .dropdown-menu li a {
        padding: 12px 16px;
        color: var(--text-body);
        font-size: 15px;
    }

    .nav-mobile-contact {
        display: block;
        padding: 20px 0 5px;
        margin-top: 10px;
    }

    .nav-mobile-contact a {
        color: var(--primary-color);
        font-size: 14px;
        text-decoration: none;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .nav-mobile-contact a::before {
        content: "✉";
        font-size: 16px;
    }

    .mega-menu {
        min-width: 100%;
    }

    .mega-menu-content {
        grid-template-columns: 1fr;
        padding: 15px;
    }

    .menu-featured {
        display: none;
    }

    .language-selector {
        display: none;
    }

    .hero-section {
        height: 500px;
    }

    .hero-content h1 {
        font-size: 34px;
    }

    .hero-content p {
        font-size: 17px;
    }

    .section-header h2 {
        font-size: 32px;
    }

    .quick-cards-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }

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

    .cta-content h2 {
        font-size: 32px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-bottom-content {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .legal-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }

    .news-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .news-image {
        height: 160px;
    }

    .news-content h3 {
        font-size: 16px;
    }

    .nav-actions {
        gap: 10px;
    }

    .logo img {
        height: 45px !important;
        width: auto !important;
        max-width: 180px;
        object-fit: contain;
    }

    .search-toggle-btn {
        display: none;
    }

    .mobile-search-toggle {
        display: block;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .navbar {
        height: 70px;
    }

    .logo img {
        height: 38px !important;
        width: auto !important;
        max-width: 150px;
        object-fit: contain;
    }

    .logo a {
        font-size: 22px;
    }

    .hero-content h1 {
        font-size: 28px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn-lg {
        padding: 14px 28px;
        font-size: 16px;
    }

    .section-header h2 {
        font-size: 26px;
    }

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

    .news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .news-image {
        height: 160px;
    }

    .news-content {
        padding: 18px;
    }

    .news-content h3 {
        font-size: 16px;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .section-header h2 {
        font-size: 26px;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
}

/* 镀层性能检测详情区域 */
.detection-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.detection-section .section-title {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 24px;
    margin-top: 40px;
    color: var(--text-dark);
    padding-left: 16px;
    border-left: 4px solid var(--primary-color);
    line-height: 1.3;
}

.detection-section .section-title:first-child {
    margin-top: 0;
}

.detection-section .section-intro {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 24px;
}

.detection-section h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--text-dark);
}

.detection-section h3.sub-item {
    color: var(--secondary-color);
}

.detection-section p {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 18px;
}

.detection-section p:last-child {
    margin-bottom: 24px;
}

.detection-section strong {
    color: var(--text-dark);
}

.detection-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 44px;
    align-items: start;
}

.detection-sidebar {
    position: sticky;
    top: 100px;
}

.detection-form-card {
    background: white;
    padding: 28px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
}

.detection-form-title {
    font-size: 18px;
    font-weight: 700;
    color: white;
    margin: -28px -28px 20px -28px;
    padding: 14px 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.detection-form-desc {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 18px;
}

.detection-form-group {
    margin-bottom: 12px;
}

.detection-form-group input,
.detection-form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-body);
    background: white;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    font-family: inherit;
}

.detection-form-group input:focus,
.detection-form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 61, 122, 0.12);
}

.detection-form-group input::placeholder,
.detection-form-group textarea::placeholder {
    color: var(--text-muted);
}

.detection-form-group textarea {
    resize: vertical;
    min-height: 70px;
}

@media (max-width: 992px) {
    .detection-layout {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .detection-sidebar {
        position: static;
    }
}

@media (max-width: 480px) {
    .detection-form-card {
        padding: 20px;
    }
}