:root {
    --primary-color: #1B3A5C;
    --secondary-color: #C8A96E;
    --bg-color: #FAF8F5;
    --text-dark: #2C3E50;
    --text-light: #7F8C8D;
    --white: #FFFFFF;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    color: var(--text-dark);
    background-color: var(--bg-color);
    line-height: 1.6;
}

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

/* Header */
header {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

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

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--primary-color);
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

.logo h1 {
    font-size: 24px;
    font-weight: 700;
}

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

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
}

nav ul li a:hover,
nav ul li a.active {
    color: var(--secondary-color);
}

.lang-switch {
    margin-left: 20px;
}

.lang-switch button {
    background: none;
    border: 1px solid var(--secondary-color);
    color: var(--secondary-color);
    padding: 5px 15px;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-switch button:hover {
    background-color: var(--secondary-color);
    color: var(--white);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(27, 58, 92, 0.8), rgba(27, 58, 92, 0.8)),
                url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=luxury%20jewelry%20display%20elegant%20background%20gold%20silver%20necklace%20earrings%20professional%20photography&image_size=landscape_16_9');
    background-size: cover;
    background-position: center;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    margin-top: 70px;
}

.hero h2 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero .tagline {
    font-size: 14px;
    letter-spacing: 3px;
    margin-bottom: 15px;
    opacity: 0.8;
}

.cta-btn {
    display: inline-block;
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 15px 40px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.cta-btn:hover {
    background-color: #B8985E;
    transform: translateY(-2px);
}

/* Features Section */
.features {
    padding: 80px 0;
    background-color: var(--white);
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h3 {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.section-title p {
    color: var(--text-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    text-align: center;
    padding: 30px;
    border-radius: 10px;
    background-color: var(--bg-color);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.feature-card i {
    font-size: 40px;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.feature-card h4 {
    font-size: 18px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-light);
    font-size: 14px;
}

/* Products Section */
.products {
    padding: 80px 0;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    background-color: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-5px);
}

.product-card img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.product-info {
    padding: 20px;
}

.product-info h4 {
    font-size: 18px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.product-info .material {
    color: var(--secondary-color);
    font-size: 14px;
    margin-bottom: 15px;
}

.product-info .price {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.product-info .btn {
    display: block;
    width: 100%;
    text-align: center;
    background-color: var(--primary-color);
    color: var(--white);
    padding: 10px;
    text-decoration: none;
    border-radius: 5px;
    font-size: 14px;
    transition: background-color 0.3s ease;
}

.product-info .btn:hover {
    background-color: #152D44;
}

/* Process Section */
.process {
    padding: 80px 0;
    background-color: var(--primary-color);
    color: var(--white);
}

.process .section-title h3,
.process .section-title p {
    color: var(--white);
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 30px;
}

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

.process-step .step-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--secondary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    margin: 0 auto 20px;
}

.process-step h4 {
    font-size: 16px;
    margin-bottom: 10px;
}

.process-step p {
    font-size: 14px;
    opacity: 0.8;
}

/* About Section */
.about {
    padding: 80px 0;
    background-color: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content img {
    width: 100%;
    border-radius: 10px;
}

.about-content h3 {
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.about-content p {
    color: var(--text-light);
    margin-bottom: 20px;
}

/* Contact Section */
.contact {
    padding: 80px 0;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 40px;
    border-radius: 10px;
}

.contact-info h4 {
    font-size: 24px;
    margin-bottom: 30px;
}

.contact-info .info-item {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.contact-info .info-item i {
    font-size: 20px;
    margin-right: 15px;
    color: var(--secondary-color);
}

.contact-info .info-item p {
    opacity: 0.9;
}

.contact-form {
    background-color: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.contact-form h4 {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 30px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 15px;
    margin-bottom: 20px;
    border: 1px solid #E8E8E8;
    border-radius: 5px;
    font-size: 14px;
}

.contact-form textarea {
    height: 150px;
    resize: none;
}

.contact-form button {
    width: 100%;
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 15px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.contact-form button:hover {
    background-color: #B8985E;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 50px 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.footer-logo {
    margin-bottom: 20px;
}

.footer-logo h2 {
    font-size: 24px;
    margin-bottom: 10px;
}

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

.footer-links ul {
    list-style: none;
}

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

.footer-links ul li a {
    color: var(--white);
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-links ul li a:hover {
    opacity: 1;
}

.footer-contact .info-item {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.footer-contact .info-item i {
    margin-right: 10px;
    color: var(--secondary-color);
}

.social-links {
    display: flex;
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 10px;
    color: var(--white);
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: var(--secondary-color);
}

.footer-bottom {
    text-align: center;
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.6;
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    nav ul {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow);
    }

    nav ul.active {
        display: flex;
    }

    nav ul li {
        margin-left: 0;
        margin-bottom: 15px;
    }

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

    .hero h2 {
        font-size: 32px;
    }

    .hero p {
        font-size: 16px;
    }

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

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

    .social-links {
        justify-content: center;
    }
}

/* Products Page */
.products-header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 100px 0 40px;
    text-align: center;
}

.products-header h2 {
    font-size: 36px;
    margin-bottom: 10px;
}

.products-header p {
    opacity: 0.8;
}

.filter-section {
    padding: 20px 0;
    background-color: var(--white);
    border-bottom: 1px solid #E8E8E8;
}

.filter-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.filter-tabs button {
    padding: 10px 20px;
    border: 1px solid var(--secondary-color);
    background-color: var(--white);
    color: var(--secondary-color);
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-tabs button.active,
.filter-tabs button:hover {
    background-color: var(--secondary-color);
    color: var(--white);
}

/* Custom Service Page */
.custom-header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 100px 0 40px;
    text-align: center;
}

.custom-header h2 {
    font-size: 36px;
    margin-bottom: 10px;
}

.custom-header p {
    opacity: 0.8;
}

.custom-steps {
    padding: 80px 0;
    background-color: var(--white);
}

.custom-steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

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

.custom-step .step-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 30px;
}

.custom-step h4 {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.custom-step p {
    color: var(--text-light);
}

.custom-features {
    padding: 80px 0;
}

.custom-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.custom-feature {
    text-align: center;
    padding: 30px;
    background-color: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.custom-feature i {
    font-size: 35px;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.custom-feature h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.custom-feature p {
    color: var(--text-light);
    font-size: 14px;
}

/* About Page */
.about-header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 100px 0 40px;
    text-align: center;
}

.about-header h2 {
    font-size: 36px;
    margin-bottom: 10px;
}

.about-header p {
    opacity: 0.8;
}

.timeline {
    padding: 80px 0;
    background-color: var(--white);
}

.timeline-item {
    display: flex;
    margin-bottom: 40px;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-dot {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: var(--secondary-color);
    margin: 0 30px;
}

.timeline-content {
    flex: 1;
    padding: 20px;
    background-color: var(--bg-color);
    border-radius: 10px;
}

.timeline-content h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.timeline-content p {
    color: var(--text-light);
}

.capabilities {
    padding: 80px 0;
}

.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.capability-card {
    text-align: center;
    padding: 40px 20px;
    background-color: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.capability-card .number {
    font-size: 48px;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.capability-card h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.capability-card p {
    color: var(--text-light);
    font-size: 14px;
}