/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* 导航栏样式 */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease-in-out;
}

/* 隐藏状态 */
.header.header-hidden {
    transform: translateY(-100%);
}

/* 显示状态 */
.header.header-visible {
    transform: translateY(0);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.brand-text {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1C7FEF;
    line-height: 1;
}

.brand-subtitle {
    font-size: 0.8rem;
    font-weight: 400;
    color: #64748b;
    line-height: 1;
}

.logo {
    height: 48px;
    width: auto;
}

.brand-text {
    font-size: 1.2rem;
    font-weight: 500;
    color: #1C7FEF;
}

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

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 400;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #2563eb;
}

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 主要内容区域 */
main {
    margin-top: 72px;
}

/* 英雄区域样式 */
.hero {
    min-height: 90vh;
    background: linear-gradient(135deg, #b4b8f1 0%, #206bc5 100%);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/banner_bg.jpg') center/cover;
    opacity: 0.3;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.hero-text {
    color: white;
}

.hero-text h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, #fff, #e0e7ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text h2 {
    font-size: 2.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-description {
    margin-bottom: 3rem;
    opacity: 0.8;
}

.hero-description p {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: #2563eb;
    color: white;
}

.btn-primary:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

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

.btn-secondary:hover {
    background: white;
    color: #2563eb;
    transform: translateY(-2px);
}

.hero-image {
    position: relative;
}

.hero-image img {
    /* width: 100%;
    height: auto;
    border-radius: 5px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3); */
}

/* 特色功能区域 */
.features {
    padding: 6rem 0;
    background: #f8fafc;
}

.section-title {
    text-align: center;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 4rem;
    color: #1e293b;
}

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

.feature-card {
    background: white;
    padding: 3rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 2rem;
    background: linear-gradient(135deg, #1C7FEF 0%, #0F5FBF 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.feature-icon i {
    font-size: 2.5rem;
}

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

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1e293b;
}

.feature-card p {
    color: #64748b;
    line-height: 1.6;
}

/* 页脚样式 */
.footer {
    background: #1e293b;
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.footer-brand p {
    color: #94a3b8;
}

.footer-logo {
    height: 48px;
    width: auto;
    filter: brightness(0) saturate(100%) invert(64%) sepia(8%) saturate(1171%) hue-rotate(182deg) brightness(95%) contrast(89%);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-column h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #e2e8f0;
}

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

.footer-column ul li {
    margin-bottom: 0.5rem;
}

.footer-column ul li a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-column ul li a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 2rem;
    text-align: center;
    color: #94a3b8;
}

/* 公司简介部分 */
.about {
    padding: 6rem 0;
    background: url('../images/about_bg.jpg') center/cover;
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.5);
    z-index: 1;
}

.about-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.about-text .section-title {
    text-align: left;
    margin-bottom: 2rem;
    font-size: 2.5rem;
}

.about-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #64748b;
    margin-bottom: 3rem;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.about-feature {
    text-align: center;
    padding: 1.5rem;
    background: #f8fafc;
    border-radius: 15px;
    border: 1px solid #e2e8f0;
}

.about-feature h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1C7FEF;
    margin-bottom: 0.5rem;
}

.about-feature p {
    font-size: 0.9rem;
    color: #64748b;
}

/* 招贤纳士部分 */
.careers {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.careers-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-top: 3rem;
}

.careers-text h3 {
    font-size: 2rem;
    font-weight: 600;
    color: #1e293b;
}

.careers-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #64748b;
    margin-bottom: 2rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.contact-item svg {
    width: 24px;
    height: 24px;
    color: #1C7FEF;
}

.contact-item span {
    font-size: 1.1rem;
    font-weight: 500;
    color: #1e293b;
}

.careers-image {
    position: relative;
}

.careers-image img {
    width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

/* 人脸识别系统功能介绍 */
.face-recognition {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
}

.face-recognition::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e2e8f0" stroke-width="0.5" opacity="0.3"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>') center/cover;
    opacity: 0.5;
    z-index: 1;
}

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

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: #64748b;
    margin-bottom: 4rem;
    font-weight: 400;
}

.face-recognition-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
    margin-bottom: 4rem;
}

.face-recognition-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.feature-intro {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

.feature-intro:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.feature-intro-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #1C7FEF 0%, #0F5FBF 100%);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.feature-intro-icon i {
    font-size: 1.5rem;
    color: white;
}

.feature-intro h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 1rem;
}

.feature-intro p {
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-list li {
    color: #64748b;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.5rem;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #1C7FEF;
    font-weight: bold;
}

.face-recognition-demo {
    display: flex;
    justify-content: center;
    align-items: center;
}

.demo-container {
    background: #1e293b;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.demo-screen {
    background: #0f172a;
    border-radius: 15px;
    padding: 1.5rem;
    min-width: 300px;
}

.demo-interface {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    border-radius: 10px;
    padding: 1.5rem;
}

.demo-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #475569;
}

.demo-title {
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
}

.demo-status {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.demo-status.online {
    background: #10b981;
    color: white;
}

.demo-camera {
    text-align: center;
}

.camera-frame {
    width: 200px;
    height: 200px;
    border: 2px solid #1C7FEF;
    border-radius: 15px;
    margin: 0 auto 1.5rem;
    position: relative;
    background: linear-gradient(45deg, #0f172a 0%, #1e293b 100%);
    overflow: hidden;
}

.face-outline {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 150px;
    border: 2px solid #10b981;
    border-radius: 50% 50% 50% 50% / 40% 40% 60% 60%;
    animation: pulse 2s infinite;
}

.scan-line {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent 0%, #1C7FEF 50%, transparent 100%);
    animation: scan 3s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 1; transform: translate(-50%, -50%) scale(1.05); }
}

@keyframes scan {
    0% { top: 0; }
    100% { top: calc(100% - 2px); }
}

.demo-info {
    color: #94a3b8;
    font-size: 0.9rem;
}

.demo-info p {
    margin: 0.5rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.demo-info i {
    color: #1C7FEF;
}

.face-recognition-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 4rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1C7FEF;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: #64748b;
    font-weight: 500;
}

/* 特种证件制作系统功能介绍 */
.certificate-system {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    position: relative;
}

.certificate-system::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="cert-grid" width="12" height="12" patternUnits="userSpaceOnUse"><path d="M 12 0 L 0 0 0 12" fill="none" stroke="%23cbd5e1" stroke-width="0.5" opacity="0.4"/></pattern></defs><rect width="100" height="100" fill="url(%23cert-grid)"/></svg>') center/cover;
    opacity: 0.6;
    z-index: 1;
}

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

.certificate-system-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
    margin-bottom: 4rem;
}

.certificate-system-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.certificate-feature {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

.certificate-feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    /* border-left-color: #5b21b6; */
}

.certificate-feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #7c3aed 0%, #5b21b6 100%);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.certificate-feature-icon i {
    font-size: 1.5rem;
    color: white;
}

.certificate-feature h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 1rem;
}

.certificate-feature p {
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.certificate-feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.certificate-feature-list li {
    color: #64748b;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.5rem;
}

.certificate-feature-list li::before {
    content: '◆';
    position: absolute;
    left: 0;
    color: #7c3aed;
    font-weight: bold;
}

.certificate-system-demo {
    display: flex;
    justify-content: center;
    align-items: center;
}

.certificate-demo-container {
    background: #1e293b;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.certificate-demo-screen {
    background: #0f172a;
    border-radius: 15px;
    padding: 1.5rem;
    min-width: 320px;
}

.certificate-demo-interface {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    border-radius: 10px;
    padding: 1.5rem;
}

.certificate-demo-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #475569;
}

.certificate-demo-title {
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
}

.certificate-demo-status {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    background: #7c3aed;
    color: white;
}

.certificate-preview {
    text-align: center;
}

.certificate-frame {
    width: 220px;
    height: 160px;
    border: 2px solid #7c3aed;
    border-radius: 10px;
    margin: 0 auto 1.5rem;
    position: relative;
    background: linear-gradient(45deg, #f8fafc 0%, #e2e8f0 100%);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.certificate-outline {
    width: 180px;
    height: 120px;
    border: 2px dashed #7c3aed;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(124, 58, 237, 0.1);
    animation: certificate-glow 2s infinite;
}

.certificate-icon {
    font-size: 2rem;
    color: #7c3aed;
}

.processing-line {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent 0%, #7c3aed 50%, transparent 100%);
    animation: processing 2.5s infinite;
}

@keyframes certificate-glow {
    0%, 100% { opacity: 0.7; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.02); }
}

@keyframes processing {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.certificate-demo-info {
    color: #94a3b8;
    font-size: 0.9rem;
}

.certificate-demo-info p {
    margin: 0.5rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.certificate-demo-info i {
    color: #7c3aed;
}

.certificate-system-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 4rem;
}

.certificate-stat-item {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
    /* border-top: 4px solid #7c3aed; */
}

.certificate-stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    /* border-top-color: #5b21b6; */
}

.certificate-stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #7c3aed;
    margin-bottom: 0.5rem;
}

.certificate-stat-label {
    color: #64748b;
    font-weight: 500;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .face-recognition-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .face-recognition-features {
        grid-template-columns: 1fr;
    }
    
    .face-recognition-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .demo-container {
        padding: 1rem;
    }
    
    .camera-frame {
        width: 150px;
        height: 150px;
    }
    
    .face-outline {
        width: 90px;
        height: 110px;
    }
    
    .certificate-system-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .certificate-system-features {
        grid-template-columns: 1fr;
    }
    
    .certificate-system-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .certificate-demo-container {
        padding: 1rem;
    }
    
    .certificate-frame {
        width: 200px;
        height: 140px;
    }
    
    .certificate-outline {
        width: 160px;
        height: 100px;
    }
}

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

    /* Hero部分小屏幕进一步优化 */
    .hero {
        min-height: 70vh;
        padding: 1rem 0;
    }

    .hero-content {
        padding: 0 0.5rem;
        gap: 2rem;
    }

    .hero-text h1 {
        font-size: 2.2rem;
        margin-bottom: 1rem;
    }

    .hero-text h2 {
        font-size: 1.6rem;
        margin-bottom: 0.8rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
        margin-bottom: 1.2rem;
    }

    .hero-description {
        margin-bottom: 1.5rem;
    }

    .hero-description p {
        font-size: 0.95rem;
        line-height: 1.5;
        margin-bottom: 0.6rem;
    }

    .hero-actions .btn {
        padding: 1rem 1.5rem;
        font-size: 0.95rem;
        max-width: 250px;
    }

    .hero-image {
        padding: 0 0.5rem;
    }

    .hero-image img {
        max-width: 350px;
        border-radius: 12px;
        /* box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15); */
    }

    .container {
        padding: 0 1rem;
    }

    .feature-card {
        padding: 2rem 1rem;
    }
    
    /* 关于我们部分小屏幕优化 */
    .about {
        padding: 2rem 0;
    }
    
    .about-content {
        gap: 1.5rem;
    }
    
    .about-text .section-title {
        font-size: 1.8rem;
    }
    
    .about-description {
        font-size: 0.95rem;
        margin-bottom: 1.5rem;
    }
    
    .about-features {
        gap: 1rem;
    }
    
    .about-feature {
        padding: 0.8rem;
    }
    
    .about-feature h4 {
        font-size: 1rem;
    }
    
    .about-feature p {
        font-size: 0.85rem;
    }

    /* 招贤纳士部分小屏幕优化 */
    .careers {
        padding: 2rem 0;
    }

    .careers-content {
        gap: 1.5rem;
    }

    .careers-text h3 {
        font-size: 1.6rem;
        margin-bottom: 0.8rem;
    }

    .careers-text p {
        font-size: 0.95rem;
        line-height: 1.5;
        margin-bottom: 1.2rem;
    }

    .contact-info {
        max-width: 280px;
    }

    .contact-item {
        width: 100%;
        padding: 1rem;
        flex-direction: row;
        text-align: center;
        gap: 0.5rem;
    }

    .contact-item svg {
        width: 18px;
        height: 18px;
    }

    .contact-item span {
        font-size: 0.9rem;
    }

    .careers-image {
        padding: 0 0.5rem;
    }

    .careers-image img {
        max-width: 320px;
        border-radius: 12px;
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    }

    .face-recognition-stats {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .certificate-system-stats {
        grid-template-columns: 1fr;
    }
    
    .certificate-stat-number {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background-color: 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;
    }

    .nav-toggle {
        display: flex;
    }

    /* Hero部分移动端优化 */
    .hero {
        min-height: 80vh;
        padding: 2rem 0;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
        padding: 0 1rem;
    }

    .hero-text {
        order: 1;
    }

    .hero-image {
        order: 2;
    }

    .hero-text h1 {
        font-size: 2.8rem;
        line-height: 1.2;
        margin-bottom: 1.5rem;
    }

    .hero-text h2 {
        font-size: 2rem;
        line-height: 1.3;
        margin-bottom: 1rem;
    }

    .hero-subtitle {
        font-size: 1.3rem;
        margin-bottom: 1.5rem;
    }

    .hero-description {
        margin-bottom: 2rem;
    }

    .hero-description p {
        font-size: 1rem;
        line-height: 1.6;
        margin-bottom: 0.8rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .hero-actions .btn {
        width: 100%;
        max-width: 280px;
        padding: 1.2rem 2rem;
        font-size: 1rem;
    }

    .hero-image {
        max-width: 100%;
        padding: 0 1rem;
    }

    .hero-image img {
        width: 100%;
        height: auto;
        max-width: 400px;
        border-radius: 15px;
        /* box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2); */
    }

    .section-title {
        font-size: 2rem;
    }

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

    /* 关于我们部分移动端优化 */
    .about {
        padding: 3rem 0;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .about-text .section-title {
        font-size: 2rem;
        text-align: center;
        margin-bottom: 1.5rem;
    }
    
    .about-description {
        font-size: 1rem;
        line-height: 1.6;
        margin-bottom: 2rem;
        text-align: left;
    }
    
    .about-features {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .about-feature {
        text-align: center;
        padding: 1rem;
        background: rgba(255, 255, 255, 0.8);
        border-radius: 10px;
    }
    
    .about-feature h4 {
        font-size: 1.1rem;
        margin-bottom: 0.5rem;
    }
    
    .about-feature p {
        font-size: 0.9rem;
    }

    /* 招贤纳士部分移动端优化 */
    .careers {
        padding: 3rem 0;
    }

    .careers-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .careers-text {
        order: 1;
    }

    .careers-image {
        order: 2;
    }

    .careers-text h3 {
        font-size: 1.8rem;
        line-height: 1.3;
        margin-bottom: 1rem;
        text-align: center;
    }

    .careers-text p {
        font-size: 1rem;
        line-height: 1.6;
        margin-bottom: 1.5rem;
        text-align: center;
    }

    .contact-info {
        align-items: center;
        max-width: 326px;
        margin: 0 auto;
    }

    .contact-item {
        justify-content: center;
        padding: 1.2rem;
        margin-bottom: 1rem;
    }

    .contact-item svg {
        width: 20px;
        height: 20px;
    }

    .contact-item span {
        font-size: 1rem;
    }

    .careers-image {
        max-width: 100%;
        padding: 0 1rem;
    }

    .careers-image img {
        width: 100%;
        height: auto;
        max-width: 400px;
        border-radius: 15px;
        box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }
}

/* 超小屏幕优化 (320px-375px) */
@media (max-width: 375px) {
    .hero {
        min-height: 65vh;
    }

    .hero-text h1 {
        font-size: 2rem;
    }

    .hero-text h2 {
        font-size: 1.4rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-description p {
        font-size: 0.9rem;
    }

    .hero-actions .btn {
        padding: 0.9rem 1.2rem;
        font-size: 0.9rem;
        max-width: 220px;
    }

    .hero-image img {
        max-width: 300px;
    }

    .careers-text h3 {
        font-size: 1.4rem;
    }

    .careers-text p {
        font-size: 0.9rem;
    }

    .contact-item {
        padding: 0.8rem;
    }

    .contact-item span {
        font-size: 0.85rem;
        word-break: break-all;
    }

    .careers-image img {
        max-width: 280px;
    }
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #1C7FEF 0%, #0F5FBF 100%);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    box-shadow: 0 4px 15px rgba(28, 127, 239, 0.3);
    transition: all 0.3s ease;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: linear-gradient(135deg, #0F5FBF 0%, #1C7FEF 100%);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(28, 127, 239, 0.4);
}

.back-to-top:active {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(28, 127, 239, 0.3);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 1rem;
    }
}