:root {
    --primary: #0a192f;
    --secondary: #112240;
    --accent: #64ffda;
    --text: #e6f1ff;
    --text-secondary: #8892b0;
    --card: #172a45;
    --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--primary);
    color: var(--text);
    overflow-x: hidden;
    position: relative;
}

/* 粒子背景效果 */
#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    z-index: -1;
    top: 0;
    left: 0;
}

/* 导航栏 */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 50px;
    background-color: rgba(10, 25, 47, 0.9);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
}

.logo i {
    margin-right: 10px;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin: 0 15px;
}

.nav-links a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    padding: 5px 0;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--accent);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

.cta-button {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 10px 25px;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.cta-button:hover {
    background-color: rgba(100, 255, 218, 0.1);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(100, 255, 218, 0.2);
}

/* 首页英雄区域 */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 20px;
    position: relative;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    max-width: 900px;
    background: linear-gradient(to right, #e6f1ff, #64ffda);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin-bottom: 40px;
    line-height: 1.6;
}

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

.primary-button {
    background-color: var(--accent);
    color: var(--primary);
    border: none;
    padding: 12px 30px;
    border-radius: 5px;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(100, 255, 218, 0.3);
}

.primary-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(100, 255, 218, 0.4);
}

/* 产品展示区 */
.products {
    padding: 100px 50px;
    background-color: var(--secondary);
}

.section-title {
    text-align: center;
    margin-bottom: 70px;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--accent);
}

.section-title p {
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.product-card {
    background-color: var(--card);
    border-radius: 10px;
    overflow: hidden;
    transition: var(--transition);
    position: relative;
    border: 1px solid rgba(100, 255, 218, 0.1);
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
    border-color: rgba(100, 255, 218, 0.3);
}

.product-header {
    padding: 25px 25px 15px;
    border-bottom: 1px solid rgba(136, 146, 176, 0.2);
}

.product-header h3 {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.product-header .tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
}

.tag {
    background-color: rgba(100, 255, 218, 0.1);
    color: var(--accent);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.product-body {
    padding: 25px;
}

.product-body p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.product-stats {
    display: flex;
    gap: 20px;
    margin: 25px 0;
}

.stat {
    text-align: center;
    flex: 1;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.product-footer {
    padding: 20px 25px;
    background-color: rgba(23, 42, 69, 0.7);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* 技术指标区域 */
.metrics {
    padding: 100px 50px;
    background-color: var(--primary);
}

.metric-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.metric-card {
    background-color: var(--card);
    border-radius: 10px;
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(100, 255, 218, 0.1);
}

.metric-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    border-color: rgba(100, 255, 218, 0.3);
}

.metric-icon {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 20px;
}

.metric-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.metric-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.chart-container {
    background-color: var(--card);
    border-radius: 10px;
    padding: 30px;
    margin-top: 50px;
    border: 1px solid rgba(100, 255, 218, 0.1);
}

/* 客户背书 */
.clients {
    padding: 100px 50px;
    background-color: var(--secondary);
    text-align: center;
}

.client-logos {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 40px;
    margin-top: 50px;
}

.client-logo {
    width: 180px;
    height: 100px;
    background-color: var(--card);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-secondary);
    transition: var(--transition);
    border: 1px solid rgba(136, 146, 176, 0.2);
}

.client-logo:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 5px 15px rgba(100, 255, 218, 0.1);
}

/* 滑点计算器 */
.calculator {
    padding: 100px 50px;
    background-color: var(--primary);
}

.calc-container {
    background-color: var(--card);
    border-radius: 10px;
    padding: 40px;
    max-width: 800px;
    margin: 50px auto 0;
    border: 1px solid rgba(100, 255, 218, 0.1);
}

.calc-title {
    text-align: center;
    margin-bottom: 30px;
}

.calc-title h3 {
    font-size: 1.8rem;
    color: var(--accent);
    margin-bottom: 10px;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.input-group input {
    width: 100%;
    padding: 12px 15px;
    background-color: var(--secondary);
    border: 1px solid rgba(136, 146, 176, 0.2);
    border-radius: 5px;
    color: var(--text);
    font-size: 1rem;
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent);
}

.calc-result {
    background-color: var(--secondary);
    border-radius: 5px;
    padding: 25px;
    text-align: center;
    margin-top: 30px;
}

.result-label {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.result-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
}

/* 定价区域 */
.pricing {
    padding: 100px 50px;
    background-color: var(--secondary);
}

.pricing-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
}

.pricing-tab {
    padding: 15px 30px;
    background-color: transparent;
    border: none;
    color: var(--text);
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    position: relative;
    transition: var(--transition);
}

.pricing-tab.active {
    color: var(--accent);
}

.pricing-tab::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: var(--transition);
}

.pricing-tab.active::after {
    width: 100%;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.pricing-card {
    background-color: var(--card);
    border-radius: 10px;
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(100, 255, 218, 0.1);
    position: relative;
    overflow: hidden;
}

.pricing-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.popular-badge {
    position: absolute;
    top: 15px;
    right: -30px;
    background-color: var(--accent);
    color: var(--primary);
    padding: 5px 30px;
    transform: rotate(45deg);
    font-weight: 700;
    font-size: 0.8rem;
}

.pricing-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.pricing-price {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 25px;
    color: var(--accent);
}

.pricing-features {
    list-style: none;
    margin-bottom: 30px;
}

.pricing-features li {
    padding: 10px 0;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(136, 146, 176, 0.1);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features li i {
    color: var(--accent);
    margin-right: 10px;
}

/* 页脚 */
footer {
    background-color: var(--primary);
    padding: 50px;
    border-top: 1px solid rgba(136, 146, 176, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-column h4 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--accent);
}

.footer-column p, .footer-column a {
    color: var(--text-secondary);
    margin-bottom: 10px;
    display: block;
    text-decoration: none;
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--accent);
}

.copyright {
    text-align: center;
    padding-top: 30px;
    margin-top: 30px;
    border-top: 1px solid rgba(136, 146, 176, 0.1);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    nav {
        padding: 15px 20px;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .products, .metrics, .clients, .calculator, .pricing {
        padding: 60px 20px;
    }
    
    .product-grid, .metric-grid, .pricing-grid {
        grid-template-columns: 1fr;
    }
} 
/* CoralQuant additions */
.logo img { width: 40px; height: 40px; margin-right: 10px; background: #e6f1ff; border-radius: 8px; padding: 2px; }
a.cta-button, a.primary-button { display: inline-block; text-decoration: none; }
.footer-column a[href^="mailto"] { display: inline; }
.about-facts { max-width: 800px; margin: 0 auto; display: grid; gap: 12px; }
.about-facts div { background: var(--card); padding: 16px 20px; border-radius: 10px; border: 1px solid rgba(100,255,218,0.1); color: var(--text); }
.about-facts span { display: block; font-size: 0.85rem; color: var(--accent); margin-bottom: 4px; }

/* Bilingual: show only the active language */
html[data-lang="zh"] [lang="en"], html[data-lang="en"] [lang="zh"] { display: none !important; }
html { scroll-padding-top: 90px; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.lang-toggle { background: transparent; color: var(--text); border: 1px solid var(--text-secondary); border-radius: 4px; padding: 8px 12px; cursor: pointer; font-size: 0.9rem; }
.lang-toggle:hover { color: var(--accent); border-color: var(--accent); }
.about-facts b, .about-facts i { font-weight: inherit; font-style: normal; }
.product-grid { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.lang-menu { position: relative; }
.lang-options { display: none; position: absolute; right: 0; top: calc(100% + 6px); list-style: none; background: var(--secondary); border: 1px solid rgba(100,255,218,0.2); border-radius: 6px; min-width: 120px; padding: 4px 0; z-index: 200; }
.lang-menu.open .lang-options { display: block; }
.lang-options button { width: 100%; text-align: left; background: none; border: none; color: var(--text); padding: 8px 14px; cursor: pointer; font-size: 0.9rem; }
.lang-options button:hover { color: var(--accent); background: rgba(100,255,218,0.08); }