/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-beige: #FAF9F6;
    --bg-white: #FFFFFF;
    --text-black: #1A1A1A;
    --text-gray: #666666;
    --gold-color: #D4AF37;
    --gold-dark: #B8941F;
    --brown-color: #8B4513;
    --brown-light: #A0522D;
    --red-active: #DC143C;
    --border-light: #E5E5E5;
    --separator-color: rgba(26, 26, 26, 0.18);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-black);
    line-height: 1.6;
    background-color: var(--bg-beige);
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-beige);
    z-index: 1000;
    border-bottom: 1px solid var(--border-light);
    padding: 15px 0;
}

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

.logo-section {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-circle {
    width: 60px;
    height: 60px;
    background: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.site-logo {
    width: 42px;
    height: 42px;
    object-fit: contain;
    display: block;
    filter: drop-shadow(0 1px 1px rgba(0, 0, 0, 0.12));
}

.site-logo.small {
    width: 28px;
    height: 28px;
}

.logo-circle.small {
    width: 40px;
    height: 40px;
}

.logo-monogram {
    font-size: 24px;
    font-weight: 700;
    color: var(--gold-color);
    letter-spacing: -1px;
}

.logo-circle.small .logo-monogram {
    font-size: 18px;
}

.logo-text {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-black);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 35px;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-black);
    font-weight: 400;
    font-size: 15px;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a.active,
.nav-menu a:hover {
    color: var(--red-active);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px 10px;
    font-size: 14px;
    color: var(--text-black);
    transition: opacity 0.3s ease;
}

.lang-toggle:hover {
    opacity: 0.7;
}

.lang-icon {
    font-size: 16px;
}

.lang-globe {
    font-size: 16px;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-black);
    transition: all 0.3s ease;
}

/* Hero区域 */
.hero {
    padding: 120px 0 80px;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

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

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 25px;
    color: var(--text-black);
}

.hero-subtitle {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-gray);
    margin-bottom: 40px;
}

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

.btn {
    padding: 14px 32px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    transition: all 0.3s ease;
    display: inline-block;
    border: 2px solid transparent;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--brown-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(139, 69, 19, 0.3);
}

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

.btn-secondary:hover {
    background: var(--brown-color);
    color: var(--bg-white);
    transform: translateY(-2px);
}

/* Hero图片区域 */
.hero-image {
    position: relative;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gold-coins {
    position: relative;
    width: 100%;
    height: 100%;
    z-index: 2;
}

.coin-stack {
    position: absolute;
    width: 80px;
    height: 120px;
    background: linear-gradient(135deg, #FFD700 0%, #D4AF37 50%, #B8941F 100%);
    border-radius: 40px;
    box-shadow: 0 8px 20px rgba(212, 175, 55, 0.4),
                inset 0 -10px 20px rgba(0, 0, 0, 0.2),
                inset 0 10px 20px rgba(255, 255, 255, 0.3);
}

.stack-1 {
    bottom: 100px;
    left: 50px;
    transform: rotate(-5deg);
}

.stack-2 {
    bottom: 80px;
    left: 180px;
    transform: rotate(8deg);
    height: 140px;
}

.stack-3 {
    bottom: 120px;
    right: 150px;
    transform: rotate(-10deg);
    width: 70px;
    height: 110px;
}

.stack-4 {
    bottom: 90px;
    right: 50px;
    transform: rotate(5deg);
    height: 130px;
}

.chart-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    border-radius: 20px;
    opacity: 0.3;
    filter: blur(40px);
    z-index: 1;
}

.chart-background::before {
    content: '';
    position: absolute;
    top: 20%;
    left: 10%;
    right: 10%;
    bottom: 20%;
    background: 
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 20px,
            rgba(0, 255, 0, 0.1) 20px,
            rgba(0, 255, 0, 0.1) 22px
        ),
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 20px,
            rgba(255, 0, 0, 0.1) 20px,
            rgba(255, 0, 0, 0.1) 22px
        );
    border-radius: 10px;
}

/* 通用区块样式 */
section {
    padding: 80px 0;
}

.section-separator {
    height: 8px;
    background: var(--separator-color);
    max-width: 1400px;
    margin: 0 auto;
    border-radius: 999px;
}

.highlight-red {
    color: var(--red-active);
    font-weight: 600;
}

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

.section-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-black);
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-gray);
}

/* 关于我们 */
.about {
    background: var(--bg-beige);
    padding: 100px 0;
}

.about-wrapper {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 60px;
    align-items: start;
    position: relative;
}

.about-left {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.about-btn {
    position: relative;
    background: var(--brown-color);
    color: var(--bg-white);
    border: none;
    padding: 18px 35px 18px 25px;
    font-size: 16px;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: all 0.3s ease;
    clip-path: polygon(0 0, calc(100% - 25px) 0, 100% 50%, calc(100% - 25px) 100%, 0 100%);
    border-radius: 0;
    width: 100%;
}

.about-btn:hover {
    background: var(--brown-light);
    transform: translateX(5px);
}

.about-btn.active {
    background: var(--brown-light);
    box-shadow: 0 4px 15px rgba(139, 69, 19, 0.3);
}

.arrow-line {
    position: absolute;
    right: -60px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 2px;
    background: #87CEEB;
    transition: width 0.4s ease;
    z-index: 1;
}

.about-btn.active .arrow-line {
    width: 60px;
}

.about-right {
    position: relative;
}

.about-content-box {
    position: relative;
    background: var(--bg-white);
    padding: 50px;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    min-height: 400px;
    z-index: 2;
}

.about-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 10px;
    overflow: hidden;
    z-index: 1;
    opacity: 0.15;
}

.about-coins {
    position: absolute;
    bottom: -50px;
    right: -50px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, #FFD700 0%, #D4AF37 100%);
    border-radius: 50%;
    filter: blur(20px);
}

.about-chart {
    position: absolute;
    top: 20%;
    left: 10%;
    right: 10%;
    bottom: 20%;
    background: 
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 15px,
            rgba(0, 255, 0, 0.2) 15px,
            rgba(0, 255, 0, 0.2) 17px
        ),
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 15px,
            rgba(255, 0, 0, 0.2) 15px,
            rgba(255, 0, 0, 0.2) 17px
        );
    border-radius: 5px;
}

.about-text-content {
    position: relative;
    z-index: 2;
}

.content-panel {
    display: none;
    animation: fadeIn 0.5s ease;
}

.content-panel.active {
    display: block;
}

.content-panel p {
    color: var(--text-black);
    line-height: 1.9;
    font-size: 16px;
    margin-bottom: 20px;
}

.content-panel strong {
    color: var(--red-active);
    font-weight: 600;
}

.core-values {
    list-style: none;
    padding-left: 0;
    margin-top: 15px;
}

.core-values li {
    color: var(--text-black);
    line-height: 1.9;
    font-size: 16px;
    margin-bottom: 12px;
    padding-left: 25px;
    position: relative;
}

.core-values li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--red-active);
    font-size: 20px;
    font-weight: bold;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 产品 */
.products {
    background: var(--bg-beige);
    padding: 100px 0;
}

.products-intro {
    max-width: 900px;
    margin: 0 auto 50px;
}

.products-intro p {
    color: var(--text-black);
    line-height: 1.9;
    font-size: 16px;
    margin-bottom: 20px;
}

.products-intro strong {
    color: var(--red-active);
    font-weight: 600;
}

.products-divider {
    height: 1px;
    background: var(--border-light);
    margin: 50px 0;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.products-detail {
    display: grid;
    grid-template-columns: 200px 1fr 250px;
    gap: 50px;
    align-items: start;
    max-width: 1200px;
    margin: 0 auto;
}

.product-image-section {
    display: flex;
    align-items: center;
    justify-content: center;
}

.gold-bars-image {
    position: relative;
    width: 150px;
    height: 150px;
}

.gold-bar {
    position: absolute;
    background: linear-gradient(135deg, #FFD700 0%, #D4AF37 50%, #B8941F 100%);
    border-radius: 5px;
    box-shadow: 0 4px 10px rgba(212, 175, 55, 0.4),
                inset 0 -5px 10px rgba(0, 0, 0, 0.2),
                inset 0 5px 10px rgba(255, 255, 255, 0.3);
}

.bar-1 {
    width: 60px;
    height: 40px;
    bottom: 20px;
    left: 10px;
    transform: rotate(-5deg);
}

.bar-2 {
    width: 70px;
    height: 45px;
    bottom: 30px;
    left: 50px;
    transform: rotate(3deg);
}

.bar-3 {
    width: 65px;
    height: 42px;
    bottom: 50px;
    left: 20px;
    transform: rotate(-2deg);
}

.bar-4 {
    width: 55px;
    height: 38px;
    bottom: 65px;
    left: 60px;
    transform: rotate(5deg);
}

.silver-bars-image {
    position: relative;
    width: 150px;
    height: 150px;
}

.silver-bar {
    position: absolute;
    background: linear-gradient(135deg, #C0C0C0 0%, #A8A8A8 50%, #808080 100%);
    border-radius: 5px;
    box-shadow: 0 4px 10px rgba(192, 192, 192, 0.4),
                inset 0 -5px 10px rgba(0, 0, 0, 0.2),
                inset 0 5px 10px rgba(255, 255, 255, 0.3);
}

.silver-bar.bar-1 {
    width: 60px;
    height: 40px;
    bottom: 20px;
    left: 10px;
    transform: rotate(-5deg);
}

.silver-bar.bar-2 {
    width: 70px;
    height: 45px;
    bottom: 30px;
    left: 50px;
    transform: rotate(3deg);
}

.silver-bar.bar-3 {
    width: 65px;
    height: 42px;
    bottom: 50px;
    left: 20px;
    transform: rotate(-2deg);
}

.silver-bar.bar-4 {
    width: 55px;
    height: 38px;
    bottom: 65px;
    left: 60px;
    transform: rotate(5deg);
}

.otc-approach {
    max-width: 900px;
    margin: 50px auto 0;
}

.otc-approach h3 {
    font-size: 28px;
    margin-bottom: 25px;
    color: var(--text-black);
    font-weight: 600;
}

.otc-approach p {
    color: var(--text-black);
    line-height: 1.9;
    font-size: 16px;
    margin-bottom: 20px;
}

.otc-approach strong {
    color: var(--red-active);
    font-weight: 600;
}

.product-description {
    flex: 1;
}

.product-description h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--text-black);
    font-weight: 600;
}

.product-description p {
    color: var(--text-black);
    line-height: 1.9;
    font-size: 16px;
    margin-bottom: 15px;
}

.product-list {
    list-style: none;
    padding-left: 0;
    margin: 20px 0;
}

.product-list li {
    color: var(--text-black);
    line-height: 1.9;
    font-size: 16px;
    margin-bottom: 12px;
    padding-left: 25px;
    position: relative;
}

.product-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--text-black);
    font-size: 20px;
    font-weight: bold;
}

.product-pricing {
    display: flex;
    align-items: flex-start;
    justify-content: flex-end;
}

.pricing-box {
    background: var(--bg-white);
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    min-width: 200px;
}

.pricing-label {
    color: var(--text-black);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 10px;
}

.pricing-input {
    color: var(--text-gray);
    font-size: 18px;
    padding: 10px 0;
    border-bottom: 2px solid var(--border-light);
    margin-bottom: 10px;
    min-height: 30px;
    font-family: monospace;
}

.pricing-note {
    color: var(--text-gray);
    font-size: 12px;
    margin-top: 10px;
}

/* 存储解决方案 */
.storage {
    background: var(--bg-beige);
    padding: 100px 0;
}

.storage-content {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 60px;
    align-items: start;
}

.storage-text {
    flex: 1;
}

.storage-text p {
    color: var(--text-black);
    line-height: 1.9;
    font-size: 16px;
    margin-bottom: 25px;
}

.storage-text strong {
    color: var(--red-active);
    font-weight: 600;
}

.storage-cta {
    margin-top: 30px;
}

.storage-cta p {
    color: var(--text-black);
    line-height: 1.9;
    font-size: 16px;
    margin-bottom: 0;
}

.storage-cta a {
    color: #0066cc;
    text-decoration: underline;
    transition: color 0.3s ease;
}

.storage-cta a:hover {
    color: #0052a3;
}

.storage-partners {
    display: flex;
    flex-direction: column;
    gap: 40px;
    align-items: flex-end;
}

.partner-logo {
    text-align: right;
}

.partner-logo-image {
    width: 120px;
    height: 80px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.malca-amit-diamond {
    width: 60px;
    height: 60px;
    position: relative;
    transform: rotate(45deg);
}

.malca-amit-diamond::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #FFD700 0%, #D4AF37 100%);
    clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
    box-shadow: 0 2px 8px rgba(212, 175, 55, 0.3);
}

.malca-amit-diamond::after {
    content: '';
    position: absolute;
    top: 10px;
    left: 10px;
    width: calc(100% - 20px);
    height: calc(100% - 20px);
    background: linear-gradient(135deg, #FFD700 0%, #D4AF37 100%);
    clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
    opacity: 0.7;
}

.le-freeport-symbol {
    width: 50px;
    height: 50px;
    position: relative;
    border: 3px solid var(--text-black);
    border-radius: 5px;
}

.le-freeport-symbol::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 30px;
    background: var(--red-active);
    border-radius: 50%;
}

.le-freeport-symbol::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 15px;
    height: 15px;
    background: var(--bg-white);
    border-radius: 50%;
    clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
}

.partner-name {
    color: var(--text-black);
    font-size: 14px;
    font-weight: 600;
    margin: 0;
    letter-spacing: 0.5px;
}

/* 教育 */
.education {
    background: var(--bg-beige);
    padding: 150px 0;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.education-coming-soon {
    text-align: center;
}

.education-coming-soon h2 {
    font-size: 48px;
    font-weight: 700;
    color: var(--text-black);
    margin: 0;
    letter-spacing: -1px;
}

/* 联系我们 */
.contact {
    background: var(--bg-beige);
    padding: 100px 0;
}

.contact-content {
    max-width: 900px;
    margin: 0 auto;
}

.contact-section {
    margin-bottom: 40px;
}

.contact-section h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--text-black);
    font-weight: 600;
}

.contact-section p {
    color: var(--text-black);
    line-height: 1.9;
    font-size: 16px;
    margin-bottom: 0;
}

.contact-divider {
    height: 1px;
    background: var(--border-light);
    margin: 40px 0;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-detail-item {
    margin-bottom: 0;
}

.contact-detail-item h4 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-black);
    font-weight: 600;
}

.contact-detail-item p {
    color: var(--text-black);
    line-height: 1.8;
    font-size: 16px;
    margin-bottom: 5px;
}

/* 页脚 */
.footer {
    background: var(--text-black);
    color: var(--bg-white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 50px;
    margin-bottom: 40px;
}

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

.footer-logo span {
    font-size: 16px;
    font-weight: 500;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
    font-weight: 600;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 10px;
}

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

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 14px;
}

.footer-section a:hover {
    color: var(--bg-white);
}

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

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-image {
        height: 400px;
    }
    
    .about-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-btn {
        clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 50%, calc(100% - 20px) 100%, 0 100%);
    }
    
    .arrow-line {
        display: none;
    }
    
    .products-detail {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .product-image-section {
        order: 1;
        justify-content: flex-start;
    }
    
    .product-description {
        order: 2;
    }
    
    .product-pricing {
        order: 3;
        justify-content: flex-start;
    }
    
    .storage-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .storage-partners {
        align-items: flex-start;
        flex-direction: row;
        gap: 30px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .nav-menu {
        position: fixed;
        top: 90px;
        left: -100%;
        flex-direction: column;
        background: var(--bg-white);
        width: 100%;
        padding: 30px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
        transition: left 0.3s ease;
        gap: 20px;
    }

    .nav-menu.active {
        left: 0;
    }

    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-image {
        height: 300px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .products-detail {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .product-image-section {
        order: 1;
    }
    
    .product-description {
        order: 2;
    }
    
    .product-pricing {
        order: 3;
    }
    
    .storage-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .storage-partners {
        flex-direction: column;
        align-items: center;
        gap: 30px;
    }
    
    .education-coming-soon h2 {
        font-size: 36px;
    }
    
    .storage-features,
    .education-content {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        text-align: center;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .logo-section {
        gap: 10px;
    }
    
    .logo-circle {
        width: 50px;
        height: 50px;
    }
    
    .logo-monogram {
        font-size: 20px;
    }
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}