/* ===== Global Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary-color: #0066FF;
    --secondary-color: #00D4AA;
    --accent-color: #6366F1;
    --dark-bg: #0A0E27;
    --dark-blue: #1A1F3A;
    --light-bg: #F8FAFC;
    --text-dark: #1E293B;
    --text-light: #64748B;
    --text-white: #FFFFFF;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #0066FF 0%, #00D4AA 100%);
    --gradient-secondary: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    --gradient-dark: linear-gradient(135deg, #0A0E27 0%, #1A1F3A 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-primary: 'Inter', 'Noto Sans TC', sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-primary);
    line-height: var(--line-height-base);
    color: var(--text-dark);
    background-color: var(--light-bg);
    overflow-x: hidden;
}

/* 在英文模式下隐藏重复的英文静态行（带 .dual-en 的元素） */
.lang-en .dual-en {
    display: none !important;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    padding: var(--spacing-sm) 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo-svg {
    height: 55px;
    width: auto;
    transition: transform 0.3s ease;
    cursor: pointer;
}

.logo-svg:hover {
    transform: scale(1.05);
}

.logo-img {
    height: 50px;
    width: auto;
    transition: transform 0.3s ease;
    cursor: pointer;
    display: block;
}

.logo-img:hover {
    transform: scale(1.05);
}

.logo {
    font-size: 1.75rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-menu a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.nav-menu a:hover {
    background: rgba(0, 212, 170, 0.1);
    color: var(--secondary-color);
}

/* Language Switcher */
.language-switcher {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin-left: var(--spacing-md);
}

.lang-btn {
    background: transparent;
    color: var(--text-dark);
    border: 2px solid rgba(0, 0, 0, 0.2);
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
    font-family: var(--font-primary);
}

.lang-btn:hover {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
    background: rgba(0, 212, 170, 0.1);
}

.lang-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--text-white);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.hero-background img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(10, 14, 39, 0.75) 0%, rgba(26, 31, 58, 0.65) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 2rem;
    color: var(--text-white);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.hero-description {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-lg);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-white);
    box-shadow: 0 10px 30px rgba(0, 102, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 102, 255, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--text-white);
    border: 2px solid var(--text-white);
}

.btn-secondary:hover {
    background: var(--text-white);
    color: var(--dark-bg);
    transform: translateY(-3px);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator span {
    display: block;
    width: 30px;
    height: 50px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 50px;
    position: relative;
}

.scroll-indicator span::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    width: 6px;
    height: 6px;
    background: var(--secondary-color);
    border-radius: 50%;
    transform: translateX(-50%);
    animation: scrollDown 2s infinite;
}

/* ===== Section Styles ===== */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* ===== About Section ===== */
.about {
    background: var(--light-bg);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-text h3 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.about-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 3rem;
}

.feature-text h4 {
    font-size: 1.3rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

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

.about-image {
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ===== Video Section ===== */
.video-section {
    background: var(--gradient-dark);
    color: var(--text-white);
}

.video-section .section-title {
    color: var(--text-white);
}

.video-container {
    position: relative;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* ===== Product Overview ===== */
.product-overview {
    background: white;
}

.product-hero {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
    align-items: center;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(0, 212, 170, 0.05) 100%);
    border-radius: 24px;
}

.product-logo img {
    width: 100%;
    max-width: 300px;
    height: auto;
}

.product-name {
    font-size: 3.5rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.product-tagline {
    font-size: 1.8rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.product-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-light);
}

/* ===== Features Section ===== */
.features {
    background: var(--light-bg);
}

.features-grid {
    display: grid;
    gap: var(--spacing-lg);
}

.feature-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    background: white;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}

.feature-card:nth-child(even) {
    grid-template-columns: 1fr 1fr;
}

.feature-card:nth-child(even) .feature-image {
    order: 2;
}

.feature-image {
    position: relative;
    overflow: hidden;
    min-height: 350px;
}

.feature-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.feature-card:hover .feature-image img {
    transform: scale(1.1);
}

.feature-content {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.feature-number {
    font-size: 4rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.feature-content h3 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.feature-content p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-light);
}

/* ===== Advantages Section ===== */
.advantages {
    background: white;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.advantage-card {
    background: var(--light-bg);
    border-radius: 24px;
    padding: var(--spacing-lg);
    text-align: center;
    transition: all 0.3s ease;
}

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.advantage-image {
    width: 100%;
    height: 250px;
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.advantage-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.advantage-card h3 {
    font-size: 1.8rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.advantage-card p {
    font-size: 1.05rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== Team Section ===== */
.team {
    background: var(--gradient-dark);
    color: var(--text-white);
}

.team .section-title {
    color: var(--text-white);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--spacing-lg);
}

.team-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-radius: 24px;
    padding: var(--spacing-lg);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.team-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.team-photo {
    width: 150px;
    height: 150px;
    margin: 0 auto var(--spacing-md);
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(0, 102, 255, 0.3);
}

.team-initial {
    font-size: 4rem;
    font-weight: 900;
    color: white;
}

/* 头像图片样式，替代原先的姓氏圆形 */
.team-photo .team-avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.team-name {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-xs);
}

.team-title {
    font-size: 1.1rem;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-md);
}

.team-credentials {
    display: flex;
    gap: var(--spacing-xs);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(0, 212, 170, 0.2);
    border: 1px solid var(--secondary-color);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--secondary-color);
}

/* 社交链接（LinkedIn）样式 */
.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid #0077B5; /* LinkedIn 蓝 */
    color: #0077B5;
    background: rgba(0, 119, 181, 0.12);
    text-decoration: none;
    transition: transform 0.2s ease, background 0.2s ease;
}

.social-link:hover {
    transform: translateY(-2px);
    background: rgba(0, 119, 181, 0.2);
}

.social-link svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.team-description {
    font-size: 0.95rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
    text-align: left;
}

/* 团队简介中的长链接自动换行，避免撑开列宽 */
.team-description a {
    word-break: break-all;
    overflow-wrap: anywhere;
}

/* ===== Contact Section ===== */
.contact {
    background: var(--light-bg);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: white;
    border-radius: 24px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.contact-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.contact-details p {
    font-size: 1.05rem;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 0.3rem;
}

.contact-chinese {
    margin-top: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-dark);
}

.contact-phone,
.contact-email {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 600;
    transition: color 0.3s ease;
}

.contact-phone:hover,
.contact-email:hover {
    color: var(--secondary-color);
}

.contact-map {
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    height: 100%;
}

.contact-map img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ===== Footer ===== */
.footer {
    background: var(--dark-bg);
    color: var(--text-white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-logo-svg {
    height: 70px;
    width: auto;
    margin-bottom: var(--spacing-md);
    transition: transform 0.3s ease;
    cursor: pointer;
}

.footer-logo-svg:hover {
    transform: scale(1.05);
}

.footer-logo-img {
    height: 70px;
    width: auto;
    margin-bottom: var(--spacing-md);
    transition: transform 0.3s ease, filter 0.3s ease;
    cursor: pointer;
    filter: brightness(1.1);
}

.footer-logo-img:hover {
    transform: scale(1.05);
    filter: brightness(1.2);
}

.footer-brand h3 {
    font-size: 2rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
}

.footer-tagline {
    font-size: 1.1rem;
    color: var(--secondary-color) !important;
    font-weight: 600;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.footer-column h4 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    color: var(--secondary-color);
}

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

.footer-column ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-column ul li a:hover {
    color: var(--secondary-color);
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes scrollDown {
    0% {
        opacity: 0;
        transform: translateX(-50%) translateY(0);
    }
    40% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-subtitle {
        font-size: 1.5rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .product-hero {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .product-logo img {
        margin: 0 auto;
    }
    
    .feature-card,
    .feature-card:nth-child(even) {
        grid-template-columns: 1fr;
    }
    
    .feature-card:nth-child(even) .feature-image {
        order: 1;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--dark-bg);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: var(--spacing-md);
    }
    
    /* 移动端深色菜单下的文字改为浅色，确保可读性 */
    .nav-menu a {
        color: var(--text-white);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .language-switcher {
        margin-left: auto;
        margin-right: var(--spacing-sm);
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .btn {
        width: 100%;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-base: 14px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .product-name {
        font-size: 2.5rem;
    }
    
    .feature-number {
        font-size: 3rem;
    }
}