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

:root {
    --primary-blue: #00B7FF;
    --secondary-blue: #0090CC;
    --light-blue: #40C9FF;
    --gradient-blue: linear-gradient(135deg, #00B7FF 0%, #0090CC 100%);
    --dark-bg: #1A1A1A;
    --light-bg: #2A2A2A;
    --text-dark: #FFFFFF;
    --text-light: #CCCCCC;
    --white: #FFFFFF;
    --shadow: 0 10px 25px rgba(0, 183, 255, 0.1);
    --shadow-hover: 0 20px 40px rgba(0, 183, 255, 0.2);
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
    background: var(--dark-bg);
}

.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(26, 26, 26, 0.98);
    backdrop-filter: blur(15px);
    z-index: 1000;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
    transition: all 0.3s ease;
}

.header.scrolled {
    background: rgba(26, 26, 26, 1);
    box-shadow: 0 6px 40px rgba(0, 0, 0, 0.6);
}

.nav-link {
    color: var(--text-light);
}

.nav-link:hover {
    color: var(--primary-blue);
}

.bar {
    background: var(--text-light);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部导航 */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.navbar {
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo-img {
    width: 120px;
    height: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--primary-blue);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-blue);
    transition: width 0.3s ease;
}

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

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

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 3px 0;
    transition: 0.3s;
}

/* 首屏Banner */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-blue);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
}

.tech-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: techMove 20s linear infinite;
}

@keyframes techMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-content {
    text-align: center;
    color: var(--white);
    max-width: 800px;
    padding: 0 20px;
    z-index: 2;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle-inline {
    display: block;
    font-size: 2rem;
    font-weight: 500;
    margin-top: 0.5rem;
    color: rgba(255, 255, 255, 0.9);
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.8);
}

.cta-button {
    display: inline-block;
    padding: 15px 40px;
    background: var(--white);
    color: var(--primary-blue);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-blue);
    border-radius: 2px;
}

.company-overview {
    text-align: center;
    margin-bottom: 4rem;
}

.overview-text {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.advantages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

.advantage-item {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.advantage-icon svg {
    width: 40px;
    height: 40px;
}

.advantage-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.advantage-desc {
    color: var(--text-light);
    line-height: 1.7;
}

/* 产品中心 */
.products {
    padding: 100px 0;
    background: var(--white);
}

.products-content {
    text-align: center;
}

.product-concept {
    margin-bottom: 4rem;
}

.concept-text {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

.product-placeholder {
    background: var(--light-bg);
    border-radius: 20px;
    padding: 4rem 2rem;
    margin: 2rem auto;
    max-width: 600px;
}

.loading-animation {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 2rem;
}

.loading-circle {
    width: 20px;
    height: 20px;
    background: var(--primary-blue);
    border-radius: 50%;
    animation: bounce 1.4s ease-in-out infinite both;
}

.loading-circle:nth-child(1) { animation-delay: -0.32s; }
.loading-circle:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

.placeholder-text {
    color: var(--text-light);
    font-size: 1.1rem;
}

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 800px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    flex-shrink: 0;
}

.contact-icon svg {
    width: 30px;
    height: 30px;
}

.contact-details h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.contact-details p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.qr-code {
    text-align: center;
}

.qr-placeholder {
    width: 200px;
    height: 200px;
    background: var(--white);
    border-radius: 15px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.qr-placeholder svg {
    width: 150px;
    height: 150px;
}

/* 新增：真实二维码图片样式 */
.qr-image {
    width: 200px;
    height: 200px;
    object-fit: contain;
    border-radius: 15px;
    background: var(--white);
    box-shadow: var(--shadow);
    image-rendering: pixelated;
    display: none; /* 初始隐藏，加载成功后通过JS显示 */
    margin: 0 auto 1rem;
}
.qr-text {
    color: var(--text-light);
    font-weight: 500;
}

/* 底部版权区 */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 2rem 0;
    text-align: center;
}

.footer-text {
    color: rgba(255, 255, 255, 0.8);
}

.footer-text a {
    color: var(--white);
    text-decoration: none;
}

.footer-text a:hover {
    color: var(--primary-blue);
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .logo-img {
        width: 100px;
    }

    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle-inline {
        font-size: 1.3rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .advantages {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .advantage-item {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .logo-img {
        width: 80px;
    }

    .hero-title {
        font-size: 1.5rem;
    }
    
    .hero-subtitle-inline {
        font-size: 1.1rem;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .advantage-item {
        padding: 1.5rem;
    }
    
    .contact-item {
        padding: 1.5rem;
    }
}

/* 卡片和按钮样式更新 */
.advantage-item {
    background: var(--light-bg);
    color: var(--text-light);
}

.contact-item {
    background: var(--light-bg);
}

.product-placeholder {
    background: var(--light-bg);
}

.qr-placeholder {
    background: var(--light-bg);
}

/* 标题和文字颜色调整 */
.section-title {
    color: var(--text-dark);
}

.advantage-title {
    color: var(--text-dark);
}

.contact-details h3 {
    color: var(--text-dark);
}

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

/* 移动端菜单背景 */
@media (max-width: 768px) {
    .nav-menu {
        background-color: var(--dark-bg);
    }
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-blue);
    transition: width 0.3s ease;
}

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

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

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 3px 0;
    transition: 0.3s;
}

/* 首屏Banner */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-blue);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
}

.tech-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: techMove 20s linear infinite;
}

@keyframes techMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-content {
    text-align: center;
    color: var(--white);
    max-width: 800px;
    padding: 0 20px;
    z-index: 2;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle-inline {
    display: block;
    font-size: 2rem;
    font-weight: 500;
    margin-top: 0.5rem;
    color: rgba(255, 255, 255, 0.9);
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.8);
}

.cta-button {
    display: inline-block;
    padding: 15px 40px;
    background: var(--white);
    color: var(--primary-blue);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-blue);
    border-radius: 2px;
}

.company-overview {
    text-align: center;
    margin-bottom: 4rem;
}

.overview-text {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.advantages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

.advantage-item {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.advantage-icon svg {
    width: 40px;
    height: 40px;
}

.advantage-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.advantage-desc {
    color: var(--text-light);
    line-height: 1.7;
}

/* 产品中心 */
.products {
    padding: 100px 0;
    background: var(--white);
}

.products-content {
    text-align: center;
}

.product-concept {
    margin-bottom: 4rem;
}

.concept-text {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

.product-placeholder {
    background: var(--light-bg);
    border-radius: 20px;
    padding: 4rem 2rem;
    margin: 2rem auto;
    max-width: 600px;
}

.loading-animation {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 2rem;
}

.loading-circle {
    width: 20px;
    height: 20px;
    background: var(--primary-blue);
    border-radius: 50%;
    animation: bounce 1.4s ease-in-out infinite both;
}

.loading-circle:nth-child(1) { animation-delay: -0.32s; }
.loading-circle:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

.placeholder-text {
    color: var(--text-light);
    font-size: 1.1rem;
}

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 800px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    flex-shrink: 0;
}

.contact-icon svg {
    width: 30px;
    height: 30px;
}

.contact-details h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.contact-details p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.qr-code {
    text-align: center;
}

.qr-placeholder {
    width: 200px;
    height: 200px;
    background: var(--white);
    border-radius: 15px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.qr-placeholder svg {
    width: 150px;
    height: 150px;
}

/* 新增：真实二维码图片样式 */
.qr-image {
    width: 200px;
    height: 200px;
    object-fit: contain;
    border-radius: 15px;
    background: var(--white);
    box-shadow: var(--shadow);
    image-rendering: pixelated;
    display: none; /* 初始隐藏，加载成功后通过JS显示 */
    margin: 0 auto 1rem;
}
.qr-text {
    color: var(--text-light);
    font-weight: 500;
}

/* 底部版权区 */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 2rem 0;
    text-align: center;
}

.footer-text {
    color: rgba(255, 255, 255, 0.8);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle-inline {
        font-size: 1.3rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .advantages {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .advantage-item {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }
    
    .hero-subtitle-inline {
        font-size: 1.1rem;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .advantage-item {
        padding: 1.5rem;
    }
    
    .contact-item {
        padding: 1.5rem;
    }
}

/* 卡片和按钮样式更新 */
.advantage-item {
    background: var(--light-bg);
    color: var(--text-light);
}

.contact-item {
    background: var(--light-bg);
}

.product-placeholder {
    background: var(--light-bg);
}

.qr-placeholder {
    background: var(--light-bg);
}

/* 标题和文字颜色调整 */
.section-title {
    color: var(--text-dark);
}

.advantage-title {
    color: var(--text-dark);
}

.contact-details h3 {
    color: var(--text-dark);
}

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

/* 移动端菜单背景 */
@media (max-width: 768px) {
    .nav-menu {
        background-color: var(--dark-bg);
    }
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-blue);
    transition: width 0.3s ease;
}

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

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

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 3px 0;
    transition: 0.3s;
}

/* 首屏Banner */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-blue);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
}

.tech-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: techMove 20s linear infinite;
}

@keyframes techMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-content {
    text-align: center;
    color: var(--white);
    max-width: 800px;
    padding: 0 20px;
    z-index: 2;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle-inline {
    display: block;
    font-size: 2rem;
    font-weight: 500;
    margin-top: 0.5rem;
    color: rgba(255, 255, 255, 0.9);
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.8);
}

.cta-button {
    display: inline-block;
    padding: 15px 40px;
    background: var(--white);
    color: var(--primary-blue);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-blue);
    border-radius: 2px;
}

.company-overview {
    text-align: center;
    margin-bottom: 4rem;
}

.overview-text {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.advantages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

.advantage-item {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.advantage-icon svg {
    width: 40px;
    height: 40px;
}

.advantage-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.advantage-desc {
    color: var(--text-light);
    line-height: 1.7;
}

/* 产品中心 */
.products {
    padding: 100px 0;
    background: var(--white);
}

.products-content {
    text-align: center;
}

.product-concept {
    margin-bottom: 4rem;
}

.concept-text {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

.product-placeholder {
    background: var(--light-bg);
    border-radius: 20px;
    padding: 4rem 2rem;
    margin: 2rem auto;
    max-width: 600px;
}

.loading-animation {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 2rem;
}

.loading-circle {
    width: 20px;
    height: 20px;
    background: var(--primary-blue);
    border-radius: 50%;
    animation: bounce 1.4s ease-in-out infinite both;
}

.loading-circle:nth-child(1) { animation-delay: -0.32s; }
.loading-circle:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

.placeholder-text {
    color: var(--text-light);
    font-size: 1.1rem;
}

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 800px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    flex-shrink: 0;
}

.contact-icon svg {
    width: 30px;
    height: 30px;
}

.contact-details h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.contact-details p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.qr-code {
    text-align: center;
}

.qr-placeholder {
    width: 200px;
    height: 200px;
    background: var(--white);
    border-radius: 15px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.qr-placeholder svg {
    width: 150px;
    height: 150px;
}

/* 新增：真实二维码图片样式 */
.qr-image {
    width: 200px;
    height: 200px;
    object-fit: contain;
    border-radius: 15px;
    background: var(--white);
    box-shadow: var(--shadow);
    image-rendering: pixelated;
    display: none; /* 初始隐藏，加载成功后通过JS显示 */
    margin: 0 auto 1rem;
}
.qr-text {
    color: var(--text-light);
    font-weight: 500;
}

/* 底部版权区 */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 2rem 0;
    text-align: center;
}

.footer-text {
    color: rgba(255, 255, 255, 0.8);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle-inline {
        font-size: 1.3rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .advantages {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .advantage-item {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }
    
    .hero-subtitle-inline {
        font-size: 1.1rem;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .advantage-item {
        padding: 1.5rem;
    }
    
    .contact-item {
        padding: 1.5rem;
    }
}

/* 卡片和按钮样式更新 */
.advantage-item {
    background: var(--light-bg);
    color: var(--text-light);
}

.contact-item {
    background: var(--light-bg);
}

.product-placeholder {
    background: var(--light-bg);
}

.qr-placeholder {
    background: var(--light-bg);
}

/* 标题和文字颜色调整 */
.section-title {
    color: var(--text-dark);
}

.advantage-title {
    color: var(--text-dark);
}

.contact-details h3 {
    color: var(--text-dark);
}

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

/* 移动端菜单背景 */
@media (max-width: 768px) {
    .nav-menu {
        background-color: var(--dark-bg);
    }
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-blue);
    transition: width 0.3s ease;
}

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

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

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 3px 0;
    transition: 0.3s;
}

/* 首屏Banner */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-blue);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
}

.tech-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: techMove 20s linear infinite;
}

@keyframes techMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-content {
    text-align: center;
    color: var(--white);
    max-width: 800px;
    padding: 0 20px;
    z-index: 2;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle-inline {
    display: block;
    font-size: 2rem;
    font-weight: 500;
    margin-top: 0.5rem;
    color: rgba(255, 255, 255, 0.9);
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.8);
}

.cta-button {
    display: inline-block;
    padding: 15px 40px;
    background: var(--white);
    color: var(--primary-blue);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-blue);
    border-radius: 2px;
}

.company-overview {
    text-align: center;
    margin-bottom: 4rem;
}

.overview-text {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.advantages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

.advantage-item {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.advantage-icon svg {
    width: 40px;
    height: 40px;
}

.advantage-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.advantage-desc {
    color: var(--text-light);
    line-height: 1.7;
}

/* 产品中心 */
.products {
    padding: 100px 0;
    background: var(--white);
}

.products-content {
    text-align: center;
}

.product-concept {
    margin-bottom: 4rem;
}

.concept-text {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

.product-placeholder {
    background: var(--light-bg);
    border-radius: 20px;
    padding: 4rem 2rem;
    margin: 2rem auto;
    max-width: 600px;
}

.loading-animation {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 2rem;
}

.loading-circle {
    width: 20px;
    height: 20px;
    background: var(--primary-blue);
    border-radius: 50%;
    animation: bounce 1.4s ease-in-out infinite both;
}

.loading-circle:nth-child(1) { animation-delay: -0.32s; }
.loading-circle:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

.placeholder-text {
    color: var(--text-light);
    font-size: 1.1rem;
}

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 800px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    flex-shrink: 0;
}

.contact-icon svg {
    width: 30px;
    height: 30px;
}

.contact-details h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.contact-details p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.qr-code {
    text-align: center;
}

.qr-placeholder {
    width: 200px;
    height: 200px;
    background: var(--white);
    border-radius: 15px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.qr-placeholder svg {
    width: 150px;
    height: 150px;
}

/* 新增：真实二维码图片样式 */
.qr-image {
    width: 200px;
    height: 200px;
    object-fit: contain;
    border-radius: 15px;
    background: var(--white);
    box-shadow: var(--shadow);
    image-rendering: pixelated;
    display: none; /* 初始隐藏，加载成功后通过JS显示 */
    margin: 0 auto 1rem;
}
.qr-text {
    color: var(--text-light);
    font-weight: 500;
}

/* 底部版权区 */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 2rem 0;
    text-align: center;
}

.footer-text {
    color: rgba(255, 255, 255, 0.8);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle-inline {
        font-size: 1.3rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .advantages {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .advantage-item {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }
    
    .hero-subtitle-inline {
        font-size: 1.1rem;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .advantage-item {
        padding: 1.5rem;
    }
    
    .contact-item {
        padding: 1.5rem;
    }
}

/* 卡片和按钮样式更新 */
.advantage-item {
    background: var(--light-bg);
    color: var(--text-light);
}

.contact-item {
    background: var(--light-bg);
}

.product-placeholder {
    background: var(--light-bg);
}

.qr-placeholder {
    background: var(--light-bg);
}

/* 标题和文字颜色调整 */
.section-title {
    color: var(--text-dark);
}

.advantage-title {
    color: var(--text-dark);
}

.contact-details h3 {
    color: var(--text-dark);
}

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

/* 移动端菜单背景 */
@media (max-width: 768px) {
    .nav-menu {
        background-color: var(--dark-bg);
    }
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-blue);
    transition: width 0.3s ease;
}

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

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

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 3px 0;
    transition: 0.3s;
}

/* 首屏Banner */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-blue);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
}

.tech-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: techMove 20s linear infinite;
}

@keyframes techMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-content {
    text-align: center;
    color: var(--white);
    max-width: 800px;
    padding: 0 20px;
    z-index: 2;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle-inline {
    display: block;
    font-size: 2rem;
    font-weight: 500;
    margin-top: 0.5rem;
    color: rgba(255, 255, 255, 0.9);
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.8);
}

.cta-button {
    display: inline-block;
    padding: 15px 40px;
    background: var(--white);
    color: var(--primary-blue);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-blue);
    border-radius: 2px;
}

.company-overview {
    text-align: center;
    margin-bottom: 4rem;
}

.overview-text {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.advantages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

.advantage-item {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.advantage-icon svg {
    width: 40px;
    height: 40px;
}

.advantage-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.advantage-desc {
    color: var(--text-light);
    line-height: 1.7;
}

/* 产品中心 */
.products {
    padding: 100px 0;
    background: var(--white);
}

.products-content {
    text-align: center;
}

.product-concept {
    margin-bottom: 4rem;
}

.concept-text {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

.product-placeholder {
    background: var(--light-bg);
    border-radius: 20px;
    padding: 4rem 2rem;
    margin: 2rem auto;
    max-width: 600px;
}

.loading-animation {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 2rem;
}

.loading-circle {
    width: 20px;
    height: 20px;
    background: var(--primary-blue);
    border-radius: 50%;
    animation: bounce 1.4s ease-in-out infinite both;
}

.loading-circle:nth-child(1) { animation-delay: -0.32s; }
.loading-circle:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

.placeholder-text {
    color: var(--text-light);
    font-size: 1.1rem;
}

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 800px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    flex-shrink: 0;
}

.contact-icon svg {
    width: 30px;
    height: 30px;
}

.contact-details h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.contact-details p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.qr-code {
    text-align: center;
}

.qr-placeholder {
    width: 200px;
    height: 200px;
    background: var(--white);
    border-radius: 15px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.qr-placeholder svg {
    width: 150px;
    height: 150px;
}

/* 新增：真实二维码图片样式 */
.qr-image {
    width: 200px;
    height: 200px;
    object-fit: contain;
    border-radius: 15px;
    background: var(--white);
    box-shadow: var(--shadow);
    image-rendering: pixelated;
    display: none; /* 初始隐藏，加载成功后通过JS显示 */
    margin: 0 auto 1rem;
}
.qr-text {
    color: var(--text-light);
    font-weight: 500;
}

/* 底部版权区 */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 2rem 0;
    text-align: center;
}

.footer-text {
    color: rgba(255, 255, 255, 0.8);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle-inline {
        font-size: 1.3rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .advantages {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .advantage-item {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }
    
    .hero-subtitle-inline {
        font-size: 1.1rem;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .advantage-item {
        padding: 1.5rem;
    }
    
    .contact-item {
        padding: 1.5rem;
    }
}

/* 卡片和按钮样式更新 */
.advantage-item {
    background: var(--light-bg);
    color: var(--text-light);
}

.contact-item {
    background: var(--light-bg);
}

.product-placeholder {
    background: var(--light-bg);
}

.qr-placeholder {
    background: var(--light-bg);
}

/* 标题和文字颜色调整 */
.section-title {
    color: var(--text-dark);
}

.advantage-title {
    color: var(--text-dark);
}

.contact-details h3 {
    color: var(--text-dark);
}

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

/* 移动端菜单背景 */
@media (max-width: 768px) {
    .nav-menu {
        background-color: var(--dark-bg);
    }
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-blue);
    transition: width 0.3s ease;
}

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

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

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 3px 0;
    transition: 0.3s;
}

/* 首屏Banner */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-blue);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
}

.tech-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: techMove 20s linear infinite;
}

@keyframes techMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-content {
    text-align: center;
    color: var(--white);
    max-width: 800px;
    padding: 0 20px;
    z-index: 2;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle-inline {
    display: block;
    font-size: 2rem;
    font-weight: 500;
    margin-top: 0.5rem;
    color: rgba(255, 255, 255, 0.9);
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.8);
}

.cta-button {
    display: inline-block;
    padding: 15px 40px;
    background: var(--white);
    color: var(--primary-blue);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-blue);
    border-radius: 2px;
}

.company-overview {
    text-align: center;
    margin-bottom: 4rem;
}

.overview-text {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.advantages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

.advantage-item {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.advantage-icon svg {
    width: 4