* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    background: #000;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo a {
    color: #c9a227;
    text-decoration: none;
    font-size: 28px;
    font-weight: bold;
    font-style: italic;
}

.logo span {
    color: #fff;
}

.nav {
    display: flex;
    gap: 25px;
    align-items: center;
}

.nav a {
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    text-transform: uppercase;
}

.nav a:hover,
.nav a.active {
    color: #c9a227;
}

.dropdown {
    position: relative;
}

.dropdown-btn {
    background: none;
    border: none;
    color: #fff;
    font-size: 14px;
    text-transform: uppercase;
    cursor: pointer;
    padding: 0;
}

.dropdown-btn:hover {
    color: #c9a227;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #111;
    min-width: 900px;
    padding: 30px;
    display: none;
    z-index: 1001;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.dropdown:hover .dropdown-menu {
    display: flex;
    gap: 40px;
}

.dropdown-column {
    flex: 1;
    min-width: 200px;
}

.dropdown-column a {
    display: block;
    color: #aaa;
    text-decoration: none;
    font-size: 13px;
    padding: 8px 0;
    border-bottom: 1px solid #333;
    text-transform: none;
}

.dropdown-column a:hover {
    color: #c9a227;
}

.dropdown-main {
    flex: 2;
    padding-left: 40px;
    border-left: 1px solid #333;
}

.dropdown-main p {
    color: #aaa;
    font-size: 14px;
    margin-bottom: 20px;
    line-height: 1.6;
}

.dropdown-highlight {
    display: inline-block;
    background: #0056a6;
    color: #fff;
    padding: 10px 25px;
    text-decoration: none;
    font-size: 12px;
    text-transform: uppercase;
    font-weight: bold;
    margin-bottom: 20px;
}

.dropdown-images {
    display: flex;
    gap: 15px;
}

.dropdown-img {
    width: 150px;
    height: 100px;
    background: linear-gradient(135deg, #333 0%, #555 100%);
}

.header-right {
    display: flex;
    gap: 15px;
    align-items: center;
}

.search {
    display: flex;
    align-items: center;
}

.search input {
    padding: 8px 12px;
    border: none;
    font-size: 12px;
}

.search button {
    background: #0056a6;
    border: none;
    color: #fff;
    padding: 8px 12px;
    cursor: pointer;
}

.lang-dropdown {
    position: relative;
}

.lang-btn {
    background: #fff;
    border: none;
    padding: 8px 12px;
    font-size: 12px;
    cursor: pointer;
}

.lang-options {
    position: absolute;
    top: 100%;
    right: 0;
    background: #fff;
    min-width: 120px;
    display: none;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    z-index: 1002;
}

.lang-options.show {
    display: block;
}

.lang-option {
    display: block;
    width: 100%;
    background: none;
    border: none;
    padding: 10px 15px;
    text-align: left;
    font-size: 13px;
    cursor: pointer;
}

.lang-option:hover {
    background: #f0f0f0;
}

.hero {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    color: #fff;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    overflow: hidden;
}

.hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
}

.hero-content {
    position: relative;
    text-align: center;
    z-index: 1;
}

.hero h1 {
    font-size: 80px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 24px;
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.btn {
    background: #0056a6;
    color: #fff;
    padding: 12px 30px;
    text-decoration: none;
    font-size: 14px;
    text-transform: uppercase;
    font-weight: bold;
}

.btn:hover {
    background: #004488;
}

.intro {
    padding: 60px 0;
    background: #f8f8f8;
}

.intro-content {
    max-width: 700px;
}

.intro h2 {
    font-size: 28px;
    margin-bottom: 15px;
    color: #222;
}

.intro p {
    color: #666;
    font-size: 16px;
}

.products {
    padding: 60px 0;
    background: #f8f8f8;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.product-card {
    background: #fff;
}

.product-image {
    height: 300px;
    background: linear-gradient(135deg, #333 0%, #555 100%);
    position: relative;
    overflow: hidden;
}

.product-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.product-info {
    padding: 30px;
}

.product-info h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #222;
}

.product-info p {
    color: #666;
    margin-bottom: 20px;
    font-size: 15px;
}

.learn-more {
    display: inline-block;
    background: #0056a6;
    color: #fff;
    padding: 10px 25px;
    text-decoration: none;
    font-size: 13px;
    text-transform: uppercase;
    font-weight: bold;
}

.services-section {
    padding: 80px 0;
    background: #000;
    color: #fff;
}

.services-text {
    max-width: 500px;
}

.services-text h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

.services-text p {
    font-size: 16px;
    color: #ccc;
}

.partners {
    padding: 60px 0;
    background: #f8f8f8;
}

.partners h2 {
    font-size: 28px;
    margin-bottom: 15px;
    color: #222;
}

.partners > p {
    color: #666;
    margin-bottom: 40px;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 30px;
    align-items: center;
}

.partner-logo {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #eee;
    color: #666;
    font-size: 12px;
    text-transform: uppercase;
}

.locations {
    padding: 80px 0;
    background: #f8f8f8;
}

.locations-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.locations-text h2 {
    font-size: 28px;
    margin-bottom: 15px;
    color: #222;
}

.locations-text > p {
    color: #666;
    margin-bottom: 30px;
}

.location-cards {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.location-card {
    background: #fff;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.location-card h3 {
    font-size: 16px;
    color: #222;
}

.see-more {
    background: #0056a6;
    color: #fff;
    padding: 8px 20px;
    text-decoration: none;
    font-size: 12px;
    text-transform: uppercase;
    font-weight: bold;
}

.locations-image {
    height: 400px;
    background: linear-gradient(135deg, #666 0%, #888 100%);
}

.contact {
    padding: 80px 0;
    background: #fff;
}

.contact h2 {
    font-size: 28px;
    margin-bottom: 15px;
    color: #222;
}

.contact > p {
    color: #666;
    margin-bottom: 40px;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info ul {
    list-style: none;
    margin-bottom: 40px;
}

.contact-info li {
    margin-bottom: 15px;
    color: #555;
}

.contact-numbers {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.contact-numbers h4 {
    font-size: 14px;
    text-transform: uppercase;
    color: #222;
    margin-bottom: 5px;
}

.contact-numbers p {
    color: #0056a6;
    font-size: 16px;
}

.china-contact {
    margin-top: 30px;
    padding: 25px;
    background: #ffffff;
    border: 2px solid #666;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.china-contact::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent 33%,
        rgba(102, 102, 102, 0.03) 33%,
        rgba(102, 102, 102, 0.03) 66%,
        transparent 66%
    );
    transform: rotate(0deg);
    opacity: 0;
    transition: all 0.5s ease;
    z-index: 0;
}

.china-contact:hover::before {
    opacity: 1;
    animation: slashMove 0.8s ease-in-out infinite;
}

@keyframes slashMove {
    0% {
        transform: translateX(-100%) rotate(45deg);
    }
    100% {
        transform: translateX(100%) rotate(45deg);
    }
}

.china-contact:hover {
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    transform: translateY(-2px);
}

.china-contact h4 {
    color: #333;
    font-size: 16px;
    margin-bottom: 15px;
    font-weight: bold;
    position: relative;
    z-index: 1;
}

.china-contact p {
    margin-bottom: 10px;
    color: #555;
    font-size: 15px;
    position: relative;
    z-index: 1;
}

.china-contact strong {
    color: #333;
}

.contact-form form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    padding: 12px;
    border: 1px solid #ddd;
    font-size: 14px;
}

.contact-form textarea {
    min-height: 120px;
    resize: vertical;
}

.send-btn {
    background: #0056a6;
    color: #fff;
    padding: 15px;
    border: none;
    font-size: 14px;
    text-transform: uppercase;
    font-weight: bold;
    cursor: pointer;
}

.send-btn:hover {
    background: #004488;
}

.footer {
    background: #000;
    color: #fff;
    padding: 60px 0 30px;
}

.footer-top {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 50px;
    margin-bottom: 40px;
}

.footer-logo {
    color: #c9a227;
    font-size: 24px;
    font-weight: bold;
    font-style: italic;
    margin-bottom: 20px;
}

.footer-logo span {
    color: #fff;
}

.footer-about p {
    color: #aaa;
    font-size: 14px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.footer-column h4 {
    font-size: 14px;
    text-transform: uppercase;
    margin-bottom: 20px;
    color: #fff;
}

.footer-column a {
    display: block;
    color: #aaa;
    text-decoration: none;
    font-size: 13px;
    margin-bottom: 10px;
}

.footer-column a:hover {
    color: #c9a227;
}

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 30px;
}

.footer-cert {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.cert-logo {
    background: #fff;
    color: #000;
    padding: 15px 25px;
    font-weight: bold;
    font-size: 14px;
}

.footer-cert p {
    color: #aaa;
    font-size: 13px;
}

.footer-legal {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.footer-legal a,
.footer-legal span {
    color: #aaa;
    text-decoration: none;
    font-size: 13px;
}

.footer-legal a:hover {
    color: #c9a227;
}

.footer-copyright p {
    color: #666;
    font-size: 13px;
}

@media (max-width: 992px) {
    .products-grid {
        grid-template-columns: 1fr;
    }

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

    .locations-image {
        order: -1;
    }

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

    .footer-top {
        grid-template-columns: 1fr;
    }

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

    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        gap: 15px;
    }

    .nav {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero h1 {
        font-size: 48px;
    }

    .hero p {
        font-size: 18px;
    }

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

.page-hero {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.page-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0,0,0,0.5) 0%, rgba(0,0,0,0.7) 100%);
    z-index: 1;
}

.page-hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.page-hero h1 {
    font-size: 56px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.page-hero-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.page-hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.page-content {
    padding: 60px 0;
    background: #f8f8f8;
}

.page-content h2 {
    font-size: 28px;
    margin-bottom: 15px;
    color: #222;
}

.page-content > p {
    color: #666;
    margin-bottom: 40px;
}

.services-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.service-item {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 30px;
    background: #fff;
    padding: 30px;
}

.service-image {
    height: 200px;
    background: linear-gradient(135deg, #333 0%, #555 100%);
}

.service-details h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #222;
}

.service-details p {
    color: #666;
    margin-bottom: 20px;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.about-image {
    height: 300px;
    background: linear-gradient(135deg, #333 0%, #555 100%);
}

.about-text p {
    color: #666;
    margin-bottom: 20px;
}

.about-content-full {
    background: #fff;
    padding: 40px;
    border-radius: 8px;
}

.about-content-full p {
    color: #444;
    margin-bottom: 25px;
    line-height: 1.8;
    font-size: 16px;
}

@media (max-width: 992px) {
    .service-item {
        grid-template-columns: 1fr;
    }

    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-content-full {
        padding: 25px;
    }
}

.products-page {
    padding: 60px 0;
    background: #f5f7fa;
}

.products-page-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 30px;
}

.products-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: sticky;
    top: 100px;
    height: fit-content;
}

.sidebar-section {
    background: #fff;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.sidebar-title {
    font-size: 20px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 20px;
}

.product-categories {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.category-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    background: #f8f9fb;
    border-radius: 8px;
    color: #475467;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.category-item:hover {
    background: #fff;
    border-color: #1a1a1a;
    color: #1a1a1a;
}

.category-item.active {
    background: #1a1a1a;
    color: #fff;
}

.category-group {
    margin-bottom: 8px;
}

.category-toggle {
    width: 100%;
    padding: 12px 16px;
    background: #1a1a1a;
    border-radius: 8px;
    color: #fff;
    border: none;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.category-toggle:hover {
    background: #333;
}

.category-toggle::after {
    content: '▼';
    font-size: 12px;
    transition: transform 0.3s ease;
}

.category-toggle.expanded::after {
    transform: rotate(180deg);
}

.category-submenu {
    margin-top: 8px;
    padding-left: 8px;
    display: none;
    flex-direction: column;
    gap: 8px;
}

.category-submenu.show {
    display: flex;
}

.sidebar-contact {
}

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

.sidebar-contact-form input,
.sidebar-contact-form textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.sidebar-contact-form input:focus,
.sidebar-contact-form textarea:focus {
    outline: none;
    border-color: #1a1a1a;
    box-shadow: 0 0 0 3px rgba(26, 26, 26, 0.1);
}

.sidebar-contact-form textarea {
    resize: vertical;
    min-height: 100px;
}

.submit-btn {
    padding: 14px 24px;
    background: linear-gradient(135deg, #1a1a1a 0%, #333333 100%);
    color: #fff;
    border: none;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(26, 26, 26, 0.3);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(26, 26, 26, 0.4);
}

.products-main {
    background: #fff;
    border-radius: 12px;
    padding: 30px;
}

.products-header {
    margin-bottom: 30px;
}

.products-main-title {
    font-size: 22px;
    font-weight: 700;
    color: #1a1a1a;
}

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

.product-card-new {
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
}

.product-card-new:hover {
    transform: translateY(-8px);
}

.product-card-image {
    aspect-ratio: 1;
    background: #f3f4f6;
    overflow: hidden;
    border-radius: 16px;
}

.product-card-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.product-card-name {
    margin-top: 12px;
    text-align: center;
    font-size: 13px;
    color: #475467;
    font-weight: 500;
}

/* 产品详细介绍展示 */
.product-detail-display {
    width: 100%;
}

.product-detail-section {
    width: 100%;
}

.product-detail-images {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.product-detail-image {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.product-specs {
    margin-top: 40px;
}

.product-specs-title {
    font-size: 20px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #1a1a1a;
}

.product-specs-table {
    width: 100%;
    border-collapse: collapse;
}

.product-specs-table th,
.product-specs-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

.product-specs-table th {
    background: #f8f9fb;
    font-weight: 600;
    color: #1a1a1a;
    font-size: 14px;
}

.product-specs-table td {
    color: #475467;
    font-size: 14px;
}

.product-specs-table tr:hover {
    background: #f9fafb;
}

.spec-color-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    color: #fff;
}

.spec-color-yellow { background: #f59e0b; }
.spec-color-dual { background: linear-gradient(135deg, #6366f1 0%, #ec4899 100%); }
.spec-color-black { background: #1a1a1a; }
.spec-color-bronze { background: #92400e; }
.spec-color-ceramic { background: #8b5cf6; }
.spec-color-silver { background: #6b7280; }

.product-models {
    margin-top: 40px;
}

.product-models-title {
    font-size: 20px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #1a1a1a;
}

.model-category {
    margin-bottom: 30px;
}

.model-category-title {
    font-size: 16px;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 15px;
    padding-left: 12px;
    border-left: 4px solid #f59e0b;
}

.model-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
}

.model-item {
    padding: 12px 16px;
    background: #f8f9fb;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    font-size: 13px;
    color: #475467;
    transition: all 0.2s ease;
}

.model-item:hover {
    background: #fff;
    border-color: #1a1a1a;
    color: #1a1a1a;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.product-features {
    margin-top: 40px;
}

.product-features-title {
    font-size: 20px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #1a1a1a;
}

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

.feature-item {
    padding: 16px 20px;
    background: #f8f9fb;
    border-radius: 8px;
    border-left: 4px solid #f59e0b;
    transition: all 0.2s ease;
}

.feature-item:hover {
    background: #fff;
    border-left-color: #1a1a1a;
    transform: translateX(4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.feature-number {
    display: inline-block;
    width: 28px;
    height: 28px;
    background: #f59e0b;
    color: #fff;
    border-radius: 50%;
    text-align: center;
    line-height: 28px;
    font-size: 14px;
    font-weight: 600;
    margin-right: 12px;
}

.feature-text {
    color: #475467;
    font-size: 14px;
    line-height: 1.6;
}

@media (max-width: 1200px) {
    .products-page-layout {
        grid-template-columns: 280px 1fr;
    }
    
    .products-grid-new {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .products-page-layout {
        grid-template-columns: 1fr;
    }
    
    .products-sidebar {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .sidebar-section {
        flex: 1;
        min-width: 280px;
    }
    
    .products-sidebar {
        position: static;
    }
    
    .sidebar-contact {
        position: static;
    }
}

@media (max-width: 768px) {
    .products-grid-new {
        grid-template-columns: 1fr;
    }
    
    .products-main {
        padding: 20px;
    }
}