/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 金融科技配色 */
    --primary-color: #1e88e5;
    --secondary-color: #00d4ff;
    --accent-color: #6c63ff;
    --dark-bg: #0a0e27;
    --darker-bg: #060918;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.75);
    --text-muted: rgba(255, 255, 255, 0.5);
    --text-dark: #1a1a1a;
    --text-light: #ffffff;
    --gradient-primary: linear-gradient(135deg, #1e88e5 0%, #00d4ff 100%);
    --gradient-accent: linear-gradient(135deg, #6c63ff 0%, #00d4ff 100%);
    --glow-primary: 0 0 40px rgba(30, 136, 229, 0.3);
    --glow-secondary: 0 0 40px rgba(0, 212, 255, 0.3);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--darker-bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html {
    scroll-behavior: smooth;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 60px;
}

.hero .container {
    max-width: 1800px;
}

/* Language Switcher - 下拉菜单版 */
.language-switcher {
    position: relative;
    display: flex;
    align-items: center;
}

.lang-toggle {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1.5px solid rgba(30, 136, 229, 0.3);
    background: linear-gradient(135deg, rgba(30, 136, 229, 0.08), rgba(0, 212, 255, 0.08));
    backdrop-filter: blur(10px);
    color: var(--primary-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(30, 136, 229, 0.1);
    position: relative;
}

.lang-toggle:hover {
    background: linear-gradient(135deg, rgba(30, 136, 229, 0.18), rgba(0, 212, 255, 0.18));
    border-color: var(--primary-color);
    transform: scale(1.05) rotate(180deg);
    box-shadow: 0 4px 16px rgba(30, 136, 229, 0.3);
    color: var(--secondary-color);
}

.lang-toggle svg {
    transition: all 0.3s ease;
}

.lang-toggle:hover svg {
    filter: drop-shadow(0 0 4px rgba(0, 212, 255, 0.6));
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 10px;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 12px;
    border: 1px solid var(--card-border);
    padding: 8px;
    min-width: 160px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    z-index: 1001;
}

.lang-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-btn {
    display: block;
    width: 100%;
    padding: 12px 16px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 15px;
    letter-spacing: 0.3px;
    text-align: left;
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.lang-btn.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 2px 8px rgba(30, 136, 229, 0.4);
}

/* Navigation - 精致科技感 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    z-index: 999;
    padding: 0;
}

.nav-content {
    display: flex;
    align-items: center;
    height: 80px;
    gap: 40px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo img {
    height: 52px;
    width: auto;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.1));
}

.brand-name {
    font-size: 28px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
    font-family: 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Source Han Sans CN', 'Noto Sans CJK SC', sans-serif;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 40px;
    margin: 0;
    margin-left: auto;
    padding: 0;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 16px;
    transition: all 0.3s ease;
    position: relative;
    letter-spacing: 0.3px;
    opacity: 0.85;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-links a:hover {
    opacity: 1;
    color: var(--primary-color);
}

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

/* Hero Section - 走马灯轮播 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    margin-top: 80px;
    overflow: hidden;
}

/* 走马灯容器 */
.hero-carousel {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
}

.carousel-slide.active {
    opacity: 1;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.carousel-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(10, 14, 39, 0.85) 0%, rgba(10, 14, 39, 0.75) 100%);
}

/* 指示器 */
.carousel-indicators {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    gap: 12px;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator:hover {
    background: rgba(255, 255, 255, 0.7);
    transform: scale(1.2);
}

.indicator.active {
    background: var(--primary-color);
    width: 32px;
    border-radius: 6px;
}

.hero-overlay {
    display: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 1600px;
    margin: 0 auto;
}

.hero-title {
    font-size: 72px;
    font-weight: 600;
    margin-bottom: 60px;
    line-height: 1.4;
    letter-spacing: 8px;
    color: white;
    animation: fadeInUp 1s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    gap: 32px;
    text-shadow: 0 0 60px rgba(30, 136, 229, 0.4), 0 0 30px rgba(0, 212, 255, 0.3);
}

.title-line1,
.title-line2 {
    display: block;
    font-family: 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    font-weight: 600;
    background: linear-gradient(135deg, #ffffff 0%, rgba(30, 136, 229, 0.9) 50%, rgba(0, 212, 255, 0.9) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleGlow 3s ease-in-out infinite alternate;
}

.title-line2 {
    animation-delay: 0.5s;
}

@keyframes titleGlow {
    0% {
        filter: brightness(1) drop-shadow(0 0 20px rgba(30, 136, 229, 0.3));
    }
    100% {
        filter: brightness(1.2) drop-shadow(0 0 40px rgba(0, 212, 255, 0.5));
    }
}

.hero-description {
    font-size: 22px;
    line-height: 1.8;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    letter-spacing: 1px;
    animation: fadeInUp 1s cubic-bezier(0.4, 0, 0.2, 1) 0.2s both;
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    padding-left: 30px;
    border-left: 3px solid var(--primary-color);
    box-shadow: -5px 0 20px rgba(30, 136, 229, 0.3);
    font-family: 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

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

/* Section Styles */
section {
    padding: 120px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-title {
    font-size: 52px;
    font-weight: 700;
    margin-bottom: 24px;
    line-height: 1.2;
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 19px;
    color: var(--text-secondary);
    max-width: 850px;
    margin: 0 auto;
    line-height: 1.7;
    font-weight: 400;
    letter-spacing: 0.2px;
}

/* Services Section - 带图片背景 */
.services {
    background: var(--dark-bg);
    position: relative;
    overflow: hidden;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('image/background-1.jpg') center/cover;
    opacity: 0.08;
    filter: blur(3px);
}

.services .container {
    position: relative;
    z-index: 2;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-bottom: 80px;
}

.service-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    padding: 50px 45px;
    border-radius: 24px;
    border: 1px solid var(--card-border);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(30, 136, 229, 0.3);
    box-shadow: var(--glow-primary);
}

.service-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.service-icon {
    flex-shrink: 0;
}

.service-icon svg {
    width: 44px;
    height: 44px;
    filter: drop-shadow(0 0 12px rgba(30, 136, 229, 0.7)) drop-shadow(0 0 24px rgba(0, 212, 255, 0.5));
    transition: all 0.4s ease;
}

.service-card:hover .service-icon svg {
    filter: drop-shadow(0 0 16px rgba(30, 136, 229, 0.9)) drop-shadow(0 0 32px rgba(0, 212, 255, 0.7));
    transform: scale(1.05);
}

.service-card h3 {
    font-size: 26px;
    color: var(--text-primary);
    margin: 0;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.service-card ul {
    list-style: none;
}

.service-card li {
    padding: 14px 0;
    padding-left: 28px;
    position: relative;
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.6;
    letter-spacing: 0.2px;
}

.service-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--gradient-primary);
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(30, 136, 229, 0.8);
}

/* Key Metrics - 数据可视化风格 */
.key-metrics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 80px;
}

.metric-item {
    text-align: center;
    padding: 45px 30px;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    border: 1px solid var(--card-border);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.metric-item::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(30, 136, 229, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.metric-item:hover::before {
    opacity: 1;
}

.metric-item:hover {
    transform: translateY(-5px);
    border-color: rgba(30, 136, 229, 0.4);
    box-shadow: 0 12px 40px rgba(30, 136, 229, 0.2);
}

.metric-number {
    font-size: 56px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
    letter-spacing: -1px;
    position: relative;
}

.metric-label {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
    letter-spacing: 0.2px;
}

/* Product Advantages - 产品优势（融入产品章节） */
.product-advantages {
    margin-top: 100px;
    position: relative;
}

.advantage-divider {
    text-align: center;
    margin-bottom: 70px;
    position: relative;
    padding-bottom: 30px;
}

.advantage-divider::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-color), var(--secondary-color), transparent);
}

.advantage-section-title {
    font-size: 38px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.5px;
    line-height: 1.3;
}

.advantage-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 60px;
}

.advantage-card {
    background: rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(30, 136, 229, 0.15);
    border-radius: 20px;
    padding: 45px 35px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity 0.4s ease;
}

.advantage-card:hover::before {
    opacity: 1;
}

.advantage-card:hover {
    transform: translateY(-8px);
    border-color: rgba(30, 136, 229, 0.4);
    background: rgba(255, 255, 255, 0.04);
    box-shadow: 0 16px 48px rgba(30, 136, 229, 0.2);
}

.advantage-icon {
    margin-bottom: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 70px;
    height: 70px;
    background: rgba(30, 136, 229, 0.05);
    border-radius: 16px;
    transition: all 0.4s ease;
}

.advantage-card:hover .advantage-icon {
    background: rgba(30, 136, 229, 0.12);
    transform: scale(1.05);
}

.advantage-card h4 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.4;
    letter-spacing: 0.3px;
}

.advantage-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    letter-spacing: 0.2px;
}

/* advantage-quote removed per design */

/* Products Section - 艺术化背景 */
.products {
    background: var(--darker-bg);
    position: relative;
    overflow: hidden;
}

.products-visual {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 45%;
    height: 70%;
    overflow: hidden;
}

.products-visual .section-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.12;
    filter: blur(2px) brightness(0.6);
    mask-image: linear-gradient(to right, rgba(0,0,0,0.9) 0%, transparent 100%);
    -webkit-mask-image: linear-gradient(to right, rgba(0,0,0,0.9) 0%, transparent 100%);
}

.products .container {
    position: relative;
    z-index: 2;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.product-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    padding: 45px 40px;
    border-radius: 20px;
    border: 1px solid var(--card-border);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.product-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 0;
    background: var(--gradient-primary);
    opacity: 0.1;
    transition: height 0.4s ease;
    border-radius: 0 0 20px 20px;
}

.product-card:hover::after {
    height: 100%;
}

.product-card:hover {
    transform: translateY(-6px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 15px 50px rgba(0, 212, 255, 0.15);
}

.product-card h3 {
    font-size: 22px;
    color: var(--text-primary);
    margin-bottom: 18px;
    font-weight: 600;
    letter-spacing: 0.2px;
    line-height: 1.4;
    position: relative;
    z-index: 1;
}

.product-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 15px;
    letter-spacing: 0.2px;
    position: relative;
    z-index: 1;
}

/* Product Video Container */
.product-video-container {
    margin-top: 80px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.video-wrapper {
    width: 100%;
    max-width: 1000px;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    border: 1px solid var(--card-border);
    padding: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), 
                0 0 0 1px rgba(30, 136, 229, 0.1),
                inset 0 1px 0 rgba(255, 255, 255, 0.05);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.video-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-color), var(--secondary-color), transparent);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.video-wrapper:hover::before {
    opacity: 1;
}

.video-wrapper:hover {
    border-color: rgba(30, 136, 229, 0.4);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.4),
                0 0 0 1px rgba(30, 136, 229, 0.3),
                0 0 40px rgba(30, 136, 229, 0.15),
                inset 0 1px 0 rgba(255, 255, 255, 0.08);
    transform: translateY(-4px);
}

.product-video {
    width: 100%;
    height: auto;
    border-radius: 16px;
    display: block;
    background: #000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

/* Differentiators Section */
.differentiators {
    background: var(--dark-bg);
    position: relative;
}

.differentiators-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 80px;
}

.diff-card {
    padding: 50px 45px;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    border: 1px solid var(--card-border);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.diff-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 24px;
    padding: 1px;
    background: var(--gradient-accent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.diff-card:hover::before {
    opacity: 1;
}

.diff-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 60px rgba(108, 99, 255, 0.15);
}

.diff-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 18px;
}

.diff-icon {
    flex-shrink: 0;
}

.diff-icon svg {
    width: 42px;
    height: 42px;
    filter: drop-shadow(0 0 10px rgba(108, 99, 255, 0.6)) drop-shadow(0 0 20px rgba(0, 212, 255, 0.4));
    transition: all 0.4s ease;
}

.diff-card:hover .diff-icon svg {
    filter: drop-shadow(0 0 14px rgba(108, 99, 255, 0.8)) drop-shadow(0 0 28px rgba(0, 212, 255, 0.6));
    transform: scale(1.05);
}

.diff-card h3 {
    font-size: 24px;
    color: var(--text-primary);
    margin: 0;
    font-weight: 600;
    letter-spacing: 0.2px;
    line-height: 1.4;
}

.diff-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 15px;
    letter-spacing: 0.2px;
}

.closing-quote {
    text-align: center;
    margin-top: 80px;
    padding: 50px 60px;
    background: rgba(30, 136, 229, 0.08);
    border-radius: 24px;
    border: 1px solid rgba(30, 136, 229, 0.2);
}

.closing-quote p {
    font-size: 28px;
    color: var(--text-primary);
    font-weight: 500;
    line-height: 1.5;
    letter-spacing: 0.5px;
}

/* About Section - 带图片元素 */
.about {
    background: var(--dark-bg);
    position: relative;
    overflow: hidden;
}

.about-visual {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 80%;
    overflow: hidden;
}

.about-visual .section-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.1;
    filter: blur(2px) brightness(0.6);
    mask-image: linear-gradient(to left, rgba(0,0,0,0.8) 0%, transparent 100%);
    -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,0.8) 0%, transparent 100%);
}

/* About Background Logo Pattern */
.about-bg-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    opacity: 0.035;
    z-index: 0;
}

.about-bg-logo {
    position: absolute;
    width: 240px;
    height: auto;
    filter: grayscale(1) brightness(1.25);
}

.about-bg-logo:nth-child(1) {
    top: 8%;
    left: 5%;
    transform: rotate(-15deg);
}

.about-bg-logo:nth-child(2) {
    top: 45%;
    left: 15%;
    transform: rotate(10deg);
}

.about-bg-logo:nth-child(3) {
    bottom: 12%;
    right: 8%;
    transform: rotate(-8deg);
}

.about-bg-logo:nth-child(4) {
    top: 25%;
    right: 25%;
    transform: rotate(20deg);
}

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

.about-content {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    padding: 65px 60px;
    border-radius: 28px;
    border: 1px solid var(--card-border);
}

.about-content p {
    font-size: 17px;
    line-height: 1.9;
    color: var(--text-secondary);
    letter-spacing: 0.3px;
    font-weight: 400;
}

/* Contact Section */
.contact-section {
    background: var(--darker-bg);
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.contact-section .container {
    position: relative;
    z-index: 1;
}

/* Contact Background Logo Pattern */
.contact-bg-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    opacity: 0.03;
    z-index: 0;
}

.contact-bg-logo {
    position: absolute;
    width: 260px;
    height: auto;
    filter: grayscale(1) brightness(1.2);
}

.contact-bg-logo:nth-child(1) {
    top: 8%;
    left: 6%;
    transform: rotate(-15deg);
}

.contact-bg-logo:nth-child(2) {
    top: 50%;
    right: 8%;
    transform: rotate(20deg);
}

.contact-bg-logo:nth-child(3) {
    bottom: 10%;
    left: 50%;
    transform: translateX(-50%) rotate(-10deg);
}

.contact-bg-logo:nth-child(4) {
    top: 30%;
    left: 30%;
    transform: rotate(8deg);
}

/* Contact Header */
.contact-header {
    text-align: center;
    margin-bottom: 70px;
}

.contact-title {
    font-size: 48px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.contact-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: 0.4px;
    max-width: 900px;
    margin: 0 auto;
}

/* Contact Cards */
.contact-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 70px;
}

.contact-card {
    background: rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(30, 136, 229, 0.15);
    border-radius: 20px;
    padding: 45px 35px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity 0.4s ease;
}

.contact-card:hover::before {
    opacity: 1;
}

.contact-card:hover {
    transform: translateY(-8px);
    border-color: rgba(30, 136, 229, 0.4);
    background: rgba(255, 255, 255, 0.04);
    box-shadow: 0 16px 48px rgba(30, 136, 229, 0.2);
}

.contact-card-highlight {
    background: linear-gradient(135deg, rgba(108, 99, 255, 0.12), rgba(0, 212, 255, 0.12));
    border: 1.5px solid rgba(108, 99, 255, 0.3);
    transform: scale(1.05);
}

.contact-card-highlight:hover {
    transform: translateY(-8px) scale(1.05);
    border-color: rgba(108, 99, 255, 0.5);
    box-shadow: 0 20px 60px rgba(108, 99, 255, 0.3);
}

.contact-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(30, 136, 229, 0.1);
    border-radius: 16px;
    color: var(--secondary-color);
    transition: all 0.4s ease;
}

.contact-card-highlight .contact-icon {
    background: rgba(108, 99, 255, 0.2);
    color: #00d4ff;
}

.contact-card:hover .contact-icon {
    background: rgba(30, 136, 229, 0.2);
    transform: scale(1.1) rotate(5deg);
}

.contact-label {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 12px;
}

.contact-info {
    font-size: 18px;
    color: var(--text-primary);
    font-weight: 500;
    letter-spacing: 0.3px;
}

.contact-email {
    font-size: 22px;
    font-weight: 700;
    color: var(--secondary-color);
    text-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

/* Footer */
.footer {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border-top: 1px solid rgba(30, 136, 229, 0.12);
    padding: 28px 0;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.03);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.footer-logo {
    height: 38px;
    width: auto;
}

.footer-brand-name {
    font-size: 24px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
    font-family: 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

.footer-copyright {
    text-align: right;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.footer-copyright p {
    margin: 0;
    color: #5a6c7d;
    font-size: 13px;
    line-height: 1.5;
    letter-spacing: 0.2px;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .container {
        padding: 0 40px;
    }

    .services-grid,
    .advantage-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .key-metrics {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 24px;
    }

    .language-switcher {
        margin-left: auto;
    }

    .navbar {
        padding: 0;
    }

    .nav-content {
        height: 60px;
    }

    .nav-links {
        display: none;
        /* 移动端隐藏菜单，需要时可添加汉堡菜单 */
    }

    .logo img {
        height: 34px;
    }

    .brand-name {
        font-size: 22px;
    }

    .hero {
        margin-top: 60px;
        padding: 80px 0;
    }

    .hero-title {
        font-size: 48px;
        line-height: 1.4;
        margin-bottom: 40px;
        letter-spacing: 4px;
        gap: 24px;
    }
    
    .hero-content {
        max-width: 100%;
    }

    .hero-description {
        font-size: 18px;
        line-height: 1.7;
        padding-left: 20px;
    }

    .section-title {
        font-size: 36px;
        margin-bottom: 20px;
    }

    .section-subtitle {
        font-size: 16px;
    }

    section {
        padding: 80px 0;
    }

    .section-header {
        margin-bottom: 50px;
    }

    .services-grid,
    .products-grid,
    .advantage-grid,
    .key-metrics {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .service-card,
    .product-card,
    .advantage-card {
        padding: 35px 28px;
        border-radius: 18px;
    }

    .service-card h3,
    .product-card h3,
    .advantage-card h4 {
        font-size: 22px;
    }

    .product-advantages {
        margin-top: 60px;
    }

    .advantage-divider {
        margin-bottom: 50px;
        padding-bottom: 20px;
    }

    .advantage-section-title {
        font-size: 28px;
    }

    /* advantage-quote removed in mobile as well */

    .metric-item {
        padding: 35px 24px;
    }

    .metric-number {
        font-size: 44px;
    }

    .about-content {
        padding: 45px 32px;
        border-radius: 20px;
    }

    .about-content p {
        font-size: 16px;
    }

    .contact-cards {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .contact-card-highlight {
        transform: none;
    }
    
    .contact-title {
        font-size: 36px;
    }
    
    .contact-subtitle {
        font-size: 16px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }
    
    .footer-brand {
        justify-content: center;
    }
    
    .footer-logo {
        height: 32px;
    }
    
    .footer-brand-name {
        font-size: 20px;
    }
    
    .footer-copyright {
        text-align: center;
    }
}

/* English Language Optimizations */
body[data-lang="en"] .hero-title {
    font-size: 56px;
    letter-spacing: 4px;
    gap: 28px;
}

body[data-lang="en"] .title-line1,
body[data-lang="en"] .title-line2 {
    line-height: 1.3;
}

body[data-lang="en"] .hero-description {
    font-size: 20px;
    line-height: 1.7;
}

body[data-lang="en"] .section-subtitle {
    font-size: 17px;
    line-height: 1.65;
}

body[data-lang="en"] .service-card h3 {
    font-size: 22px;
    letter-spacing: 0.3px;
}

body[data-lang="en"] .service-card ul li {
    font-size: 15px;
    line-height: 1.7;
}

body[data-lang="en"] .product-card h3 {
    font-size: 21px;
    letter-spacing: 0.3px;
}

body[data-lang="en"] .product-card p {
    font-size: 15px;
    line-height: 1.7;
}

body[data-lang="en"] .advantage-card h4 {
    font-size: 19px;
    letter-spacing: 0.3px;
}

body[data-lang="en"] .advantage-card p {
    font-size: 15px;
    line-height: 1.7;
}

body[data-lang="en"] .about-content {
    font-size: 17px;
    line-height: 1.75;
}

body[data-lang="en"] .contact-subtitle {
    font-size: 18px;
    line-height: 1.6;
}

@media (max-width: 1400px) {
    body[data-lang="en"] .hero-title {
        font-size: 48px;
        letter-spacing: 3px;
        gap: 24px;
    }
}

@media (max-width: 768px) {
    body[data-lang="en"] .hero-title {
        font-size: 36px;
        letter-spacing: 2px;
        gap: 20px;
    }
    
    body[data-lang="en"] .hero-description {
        font-size: 17px;
        line-height: 1.65;
    }
    
    body[data-lang="en"] .section-subtitle {
        font-size: 15px;
    }
    
    body[data-lang="en"] .service-card ul li,
    body[data-lang="en"] .product-card p,
    body[data-lang="en"] .advantage-card p {
        font-size: 14px;
    }
    
    body[data-lang="en"] .about-content {
        font-size: 15px;
        line-height: 1.7;
    }
}