/* ==================== 南京朔特科技有限公司 - 科技感样式 ==================== */
/* 基于参考网站风格，增强科技感和视觉冲击力 */

/* ==================== 全局变量与重置 ==================== */
:root {
    /* 主色调 - 科技蓝紫渐变 */
    --primary-color: #2563EB;
    --primary-dark: #1E40AF;
    --primary-light: #3B82F6;

    /* 辅助色 */
    --secondary-color: #7C3AED;
    --accent-color: #0891B2;
    --glow-cyan: #06B6D4;
    --glow-purple: #8B5CF6;

    /* 背景色 - 明亮科技主题 */
    --bg-primary: #F8FAFC;
    --bg-secondary: #FFFFFF;
    --bg-card: rgba(255, 255, 255, 0.9);
    --bg-glass: rgba(255, 255, 255, 0.7);

    /* 文字色 */
    --text-primary: #1E293B;
    --text-secondary: #475569;
    --text-muted: #64748B;

    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #2563EB 0%, #7C3AED 100%);
    --gradient-secondary: linear-gradient(135deg, #0891B2 0%, #2563EB 100%);
    --gradient-glow: linear-gradient(135deg, #06B6D4 0%, #8B5CF6 100%);
    --gradient-dark: linear-gradient(180deg, #F8FAFC 0%, #E2E8F0 100%);

    /* 阴影与发光 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.12);
    --shadow-glow-cyan: 0 0 20px rgba(6, 182, 212, 0.25);
    --shadow-glow-purple: 0 0 20px rgba(139, 92, 246, 0.25);

    /* 边框 */
    --border-color: rgba(37, 99, 235, 0.2);
    --border-glow: 1px solid rgba(6, 182, 212, 0.3);

    /* 过渡 */
    --transition-fast: all 0.2s ease;
    --transition: all 0.3s ease;
    --transition-slow: all 0.5s ease;

    /* 字体 */
    --font-tech: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-tech);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

/* 科技感网格背景 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(37, 99, 235, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.06) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(37, 99, 235, 0.15);
    z-index: 1000;
    transition: var(--transition);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    height: 80px;
}

.nav-brand .logo {
    height: 80px;
    width: auto;
    filter: drop-shadow(0 0 10px rgba(0, 240, 255, 0.5));
    object-fit: contain;
}

.nav-menu {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    position: relative;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-glow);
    transition: var(--transition);
    box-shadow: 0 0 10px var(--glow-cyan);
}

.nav-link:hover,
.nav-link.active {
    color: var(--glow-cyan);
    text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
}

.nav-link:hover::before,
.nav-link.active::before {
    width: 100%;
}

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

.hamburger span {
    width: 28px;
    height: 3px;
    background: var(--primary-color);
    transition: var(--transition);
    border-radius: 2px;
    box-shadow: 0 0 5px var(--primary-color);
}

/* ==================== Hero区域 ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    background: var(--bg-primary);
}

/* 动态背景 */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 100%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
    animation: heroGlow 10s ease-in-out infinite alternate;
}

@keyframes heroGlow {
    0% {
        opacity: 0.5;
        transform: scale(1);
    }
    100% {
        opacity: 1;
        transform: scale(1.1);
    }
}

.hero-content {
    position: relative;
    z-index: 2;
    padding: 2rem;
    animation: fadeInUp 1s ease;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: var(--bg-glass);
    border: var(--border-glow);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--glow-cyan);
    margin-bottom: 2rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    backdrop-filter: blur(10px);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
    }
    50% {
        box-shadow: 0 0 30px rgba(0, 240, 255, 0.4);
    }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    margin-bottom: 1.5rem;
    background: var(--gradient-glow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    text-shadow: 0 0 40px rgba(0, 240, 255, 0.3);
}

.hero-subtitle {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border-radius: 50px;
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient-glow);
    color: #ffffff;
    box-shadow: var(--shadow-glow-cyan);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 30px rgba(6, 182, 212, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: #ffffff;
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--text-primary);
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
}

.btn-outline:hover {
    background: var(--text-primary);
    color: #ffffff;
}

/* 滚动指示器 */
.hero-scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    animation: bounce 2s infinite;
}

.hero-scroll-indicator i {
    font-size: 1.5rem;
    color: var(--glow-cyan);
    animation: scrollArrow 2s infinite;
}

@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 scrollArrow {
    0%, 100% {
        opacity: 0.3;
        transform: translateY(0);
    }
    50% {
        opacity: 1;
        transform: translateY(10px);
    }
}

/* ==================== 通用Section样式 ==================== */
section {
    padding: 6rem 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-badge {
    display: inline-block;
    padding: 0.4rem 1.2rem;
    background: var(--bg-glass);
    border: var(--border-glow);
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--glow-cyan);
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.section-divider {
    width: 100px;
    height: 3px;
    background: var(--gradient-glow);
    margin: 1.5rem auto 0;
    border-radius: 2px;
    position: relative;
}

.section-divider::before,
.section-divider::after {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--glow-cyan);
    border-radius: 50%;
    top: 50%;
    transform: translateY(-50%);
    box-shadow: 0 0 10px var(--glow-cyan);
}

.section-divider::before {
    left: -20px;
}

.section-divider::after {
    right: -20px;
}

/* ==================== 公司介绍 ==================== */
.about {
    background: var(--bg-secondary);
    position: relative;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-text p {
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-glass);
    border-radius: 15px;
    border: var(--border-glow);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    border-color: var(--glow-cyan);
    box-shadow: var(--shadow-glow-cyan);
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-glow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

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

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.feature-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 15px;
    border: var(--border-glow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-glow);
    opacity: 0;
    transition: var(--transition);
}

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

.feature-card:hover::before {
    opacity: 0.05;
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--bg-glass);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--glow-cyan);
    border: var(--border-glow);
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    transform: rotateY(180deg);
    box-shadow: var(--shadow-glow-cyan);
}

.feature-card h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    position: relative;
    z-index: 1;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

/* ==================== 产品中心 ==================== */
.products {
    background: var(--gradient-dark);
    position: relative;
}

.products::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-glow);
    box-shadow: 0 0 20px var(--glow-cyan);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 2rem;
}

.product-card {
    background: var(--bg-card);
    border-radius: 20px;
    overflow: hidden;
    border: var(--border-glow);
    transition: var(--transition-slow);
    position: relative;
    backdrop-filter: blur(10px);
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-glow);
    opacity: 0;
    transition: var(--transition);
    border-radius: 20px;
    z-index: 0;
}

.product-card:hover {
    transform: translateY(-10px) scale(1.02);
    border-color: var(--glow-cyan);
    box-shadow: var(--shadow-glow-cyan);
}

.product-card:hover::before {
    opacity: 0.05;
}

.product-image {
    position: relative;
    height: 280px;
    overflow: hidden;
    z-index: 1;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

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

.product-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(30, 41, 59, 0.92), transparent);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    z-index: 2;
}

.product-card:hover .product-overlay {
    opacity: 1;
}

.product-content {
    padding: 2rem;
    position: relative;
    z-index: 1;
}

.product-content h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.product-content > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.product-features {
    display: grid;
    gap: 0.75rem;
}

.product-features li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-muted);
    font-size: 0.95rem;
    transition: var(--transition);
}

.product-features li:hover {
    color: var(--glow-cyan);
    transform: translateX(5px);
}

.product-features i {
    color: var(--primary-color);
    font-size: 0.8rem;
}

/* ==================== 核心技术 ==================== */
.technology {
    background: var(--bg-secondary);
    position: relative;
}

.technology-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.tech-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 3rem 2rem;
    text-align: center;
    border: var(--border-glow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.tech-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: var(--gradient-glow);
    opacity: 0;
    transition: var(--transition-slow);
    transform: rotate(45deg);
}

.tech-card:hover::before {
    opacity: 0.1;
}

.tech-card:hover {
    transform: translateY(-10px);
    border-color: var(--glow-purple);
    box-shadow: var(--shadow-glow-purple);
}

.tech-card.featured {
    background: var(--gradient-primary);
    border: none;
    transform: scale(1.05);
}

.tech-card.featured:hover {
    transform: scale(1.05) translateY(-10px);
}

.tech-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--bg-primary);
    color: var(--warning-color);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    border: 1px solid var(--warning-color);
    box-shadow: 0 0 15px rgba(245, 158, 11, 0.3);
}

.tech-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 2rem;
    background: var(--bg-glass);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--glow-cyan);
    border: var(--border-glow);
    position: relative;
    transition: var(--transition);
}

.tech-card:hover .tech-icon {
    transform: rotateY(360deg);
    box-shadow: var(--shadow-glow-cyan);
}

.tech-card.featured .tech-icon {
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff;
}

.tech-card h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    position: relative;
}

.tech-card ul {
    text-align: left;
}

.tech-card ul li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--text-secondary);
    transition: var(--transition);
}

.tech-card ul li:hover {
    color: var(--glow-cyan);
    padding-left: 2.5rem;
}

.tech-card ul li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 1.2rem;
}

.tech-card.featured ul li::before {
    color: #ffffff;
}

/* ==================== 应用行业 ==================== */
.applications {
    background: var(--gradient-dark);
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.app-card {
    background: var(--bg-card);
    border-radius: 20px;
    overflow: hidden;
    border: var(--border-glow);
    transition: var(--transition);
    position: relative;
}

.app-card:hover {
    transform: translateY(-5px);
    border-color: var(--glow-cyan);
    box-shadow: var(--shadow-glow-cyan);
}

.app-image {
    height: 220px;
    overflow: hidden;
    position: relative;
}

.app-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-glow);
    opacity: 0;
    transition: var(--transition);
    z-index: 1;
}

.app-card:hover .app-image::before {
    opacity: 0.2;
}

.app-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.app-card:hover .app-image img {
    transform: scale(1.15);
}

.app-content {
    padding: 2rem;
    text-align: center;
    position: relative;
    z-index: 2;
}

.app-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.app-content p {
    color: var(--text-muted);
}

/* ==================== 客户定制 ==================== */
.customization {
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.customization::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.customization-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.customization-content h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: #ffffff;
    text-shadow: 0 0 30px rgba(0, 240, 255, 0.3);
}

.customization-content > p {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    opacity: 0.95;
}

.customization-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature-item {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 2.5rem 2rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.feature-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-10px);
    border-color: #ffffff;
}

.feature-item i {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 0 20px rgba(255, 255, 255, 0.3));
}

.feature-item h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.feature-item p {
    font-size: 1rem;
    opacity: 0.9;
}

/* ==================== 联系我们 ==================== */
.contact {
    background: var(--bg-secondary);
}

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

.contact-info {
    display: grid;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 15px;
    border: var(--border-glow);
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.contact-item:hover {
    transform: translateX(10px);
    border-color: var(--glow-cyan);
    box-shadow: var(--shadow-glow-cyan);
}

.contact-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-glow);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--bg-primary);
    flex-shrink: 0;
    box-shadow: var(--shadow-glow-cyan);
}

.contact-text h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.contact-text p {
    font-size: 1.25rem;
    color: var(--text-primary);
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid rgba(37, 99, 235, 0.15);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand {
    text-align: left;
}

.footer-logo {
    height: 50px;
    width: auto;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 0 10px rgba(0, 240, 255, 0.5));
}

.footer-brand p {
    color: var(--text-muted);
    line-height: 1.8;
}

.footer-links h4 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.footer-links ul li {
    margin-bottom: 0.75rem;
}

.footer-links ul li a {
    color: var(--text-muted);
    transition: var(--transition);
}

.footer-links ul li a:hover {
    color: var(--glow-cyan);
    padding-left: 5px;
}

.footer-links ul li i {
    margin-right: 0.75rem;
    width: 20px;
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(37, 99, 235, 0.15);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ==================== 返回顶部按钮 ==================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 55px;
    height: 55px;
    background: var(--gradient-glow);
    color: var(--bg-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.25rem;
    box-shadow: var(--shadow-glow-cyan);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 40px rgba(0, 240, 255, 0.6);
}

/* ==================== 动画效果 ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
    }
    50% {
        box-shadow: 0 0 40px rgba(0, 240, 255, 0.6);
    }
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-features {
        grid-template-columns: 1fr;
    }

    .products-grid {
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    }

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

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        padding: 2rem;
        gap: 1rem;
        border-bottom: 1px solid rgba(37, 99, 235, 0.2);
        box-shadow: var(--shadow-lg);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .nav-menu.active {
        max-height: 500px;
    }

    .nav-link {
        padding: 1rem;
        width: 100%;
        text-align: center;
    }

    section {
        padding: 4rem 0;
    }

    .products-grid,
    .technology-grid,
    .applications-grid {
        grid-template-columns: 1fr;
    }

    .tech-card.featured {
        transform: none;
    }

    .tech-card.featured:hover {
        transform: translateY(-10px);
    }

    .back-to-top {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 50px;
        height: 50px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

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

    .btn {
        width: 100%;
        justify-content: center;
    }

    .section-header {
        margin-bottom: 3rem;
    }
}

/* ==================== 滚动条样式 ==================== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--glow-cyan);
}

/* ==================== 选中文本样式 ==================== */
::selection {
    background: var(--primary-color);
    color: #ffffff;
}

::-moz-selection {
    background: var(--primary-color);
    color: #ffffff;
}