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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Helvetica Neue', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
    overflow-x: hidden;
}

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

/* Footer container - 允许更宽的显示 */
.footer .container {
    max-width: 1400px;
}

/* Header Styles - Enhanced */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(15px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
    z-index: 1000;
    transition: all 0.3s ease;
}

.header.scrolled {
    box-shadow: 0 6px 40px rgba(0, 0, 0, 0.12);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    height: 80px;
}

.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    font-size: 24px;
    font-weight: bold;
    color: #1e40af;
    transition: transform 0.3s ease;
}

.logo a:hover {
    transform: scale(1.02);
}

.logo img {
    height: 50px;
    margin-right: 12px;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 10px;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 600;
    transition: all 0.3s ease;
    padding: 10px 20px;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
}

.nav-menu a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 80%;
    height: 3px;
    background: #1e40af;
    transition: transform 0.3s ease;
}

.nav-menu a:hover::before,
.nav-menu a.active::before {
    transform: translateX(-50%) scaleX(1);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #1e40af;
    background-color: rgba(30, 64, 175, 0.05);
}

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #1e40af;
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 3px;
}

/* Hero Section - Business Style */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.85) 0%, rgba(59, 130, 246, 0.75) 100%),
                url('/images/background.jpg') center center / cover no-repeat;
    color: white;
    text-align: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.3);
    z-index: 0;
}

.hero-bg {
    display: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    padding: 0 20px;
}

.hero-text h1 {
    font-size: 3.8rem;
    margin-bottom: 25px;
    font-weight: 800;
    text-shadow: 0 4px 20px rgba(0,0,0,0.2);
    animation: fadeInUp 1s ease;
}

.hero-text p {
    font-size: 1.4rem;
    margin-bottom: 18px;
    opacity: 0.95;
    text-shadow: 0 2px 10px rgba(0,0,0,0.1);
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 45px !important;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.4s both;
}

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

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.6s both;
}

/* Button Styles - Enhanced */
.btn {
    display: inline-block;
    padding: 15px 35px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 700;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 16px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

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

.btn-primary {
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    color: white;
    border-color: transparent;
    box-shadow: 0 8px 25px rgba(30, 64, 175, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 12px 35px rgba(30, 64, 175, 0.5);
    transform: translateY(-3px);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border-color: white;
    box-shadow: 0 4px 15px rgba(255,255,255,0.3);
}

.btn-secondary:hover {
    background-color: white;
    color: #667eea;
    box-shadow: 0 8px 25px rgba(255,255,255,0.5);
    transform: translateY(-3px);
}

.btn-outline {
    background-color: transparent;
    color: #1e40af;
    border-color: #1e40af;
    box-shadow: 0 4px 15px rgba(30, 64, 175, 0.2);
}

.btn-outline:hover {
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    color: white;
    box-shadow: 0 8px 25px rgba(30, 64, 175, 0.4);
    transform: translateY(-3px);
}

.btn-large {
    padding: 18px 45px;
    font-size: 18px;
}

/* Page Header - Enhanced */
.page-header {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::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 1440 320"><path fill="%23ffffff" fill-opacity="0.05" d="M0,192L48,197.3C96,203,192,213,288,229.3C384,245,480,267,576,250.7C672,235,768,181,864,181.3C960,181,1056,235,1152,234.7C1248,235,1344,181,1392,154.7L1440,128L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>');
    background-position: bottom;
    background-size: cover;
}

.page-header h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    font-weight: 800;
    text-shadow: 0 4px 20px rgba(0,0,0,0.2);
    position: relative;
}

.page-header p {
    font-size: 1.3rem;
    opacity: 0.95;
    text-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: relative;
}

/* Section Styles - Enhanced */
section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 70px;
}

.section-header h2 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #1e40af, #3b82f6);
    border-radius: 2px;
}

.section-header p {
    font-size: 1.2rem;
    color: #666;
    max-width: 700px;
    margin: 25px auto 0;
    line-height: 1.8;
}

/* Services Section - Enhanced with彩色图标 */
.services {
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(180deg, transparent 0%, rgba(30, 64, 175, 0.03) 100%);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    position: relative;
    z-index: 1;
}

.service-item {
    background: white;
    padding: 45px 35px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid rgba(30, 64, 175, 0.1);
    position: relative;
    overflow: hidden;
}

.service-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.05) 0%, rgba(59, 130, 246, 0.05) 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

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

.service-item:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: 0 20px 60px rgba(30, 64, 175, 0.2);
    border-color: rgba(30, 64, 175, 0.3);
}

.service-icon {
    width: 90px;
    height: 90px;
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: white;
    font-size: 2.2rem;
    position: relative;
    z-index: 1;
    box-shadow: 0 10px 30px rgba(30, 64, 175, 0.3);
    transition: all 0.4s ease;
}

.service-item:hover .service-icon {
    transform: rotateY(360deg) scale(1.1);
    box-shadow: 0 15px 40px rgba(30, 64, 175, 0.5);
}

/* Remove individual color variations - use uniform blue */
.service-item:nth-child(1) .service-icon,
.service-item:nth-child(2) .service-icon,
.service-item:nth-child(3) .service-icon,
.service-item:nth-child(4) .service-icon {
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
}

.service-item h3 {
    font-size: 1.6rem;
    margin-bottom: 18px;
    color: #1e293b;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.service-item p {
    color: #64748b;
    line-height: 1.8;
    font-size: 1.05rem;
    position: relative;
    z-index: 1;
}

/* About Preview Section - Enhanced */
.about-preview {
    padding: 120px 0;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 70px;
    align-items: center;
}

.about-text h2 {
    font-size: 2.8rem;
    margin-bottom: 30px;
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
}

.about-text p {
    font-size: 1.15rem;
    margin-bottom: 22px;
    color: #475569;
    line-height: 1.9;
}

.stats {
    display: flex;
    gap: 40px;
    margin: 45px 0;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    padding: 25px;
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.05) 0%, rgba(59, 130, 246, 0.05) 100%);
    border-radius: 15px;
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(30, 64, 175, 0.2);
}

.stat-item h3 {
    font-size: 2.5rem;
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
    font-weight: 800;
}

.stat-item p {
    color: #64748b;
    font-size: 1rem;
    margin: 0;
}

.about-image {
    position: relative;
}

.about-image::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    width: calc(100% + 40px);
    height: calc(100% + 40px);
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    border-radius: 20px;
    opacity: 0.1;
    z-index: 0;
}

.about-image img {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    position: relative;
    z-index: 1;
    transition: transform 0.5s ease;
}

.about-image:hover img {
    transform: scale(1.03);
}

/* Features Section - Enhanced */
.features {
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 40px;
}

.feature-item {
    background: white;
    padding: 40px 30px;
    border-radius: 18px;
    text-align: center;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid rgba(30, 64, 175, 0.1);
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 45px rgba(30, 64, 175, 0.2);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: white;
    font-size: 1.8rem;
    box-shadow: 0 8px 25px rgba(30, 64, 175, 0.3);
    transition: all 0.4s ease;
}

.feature-item:hover .feature-icon {
    transform: rotateY(360deg);
}

.feature-item h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: #1e293b;
    font-weight: 700;
}

.feature-item p {
    color: #64748b;
    line-height: 1.7;
}

/* CTA Section - Enhanced */
.cta {
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: pulse 10s ease-in-out infinite;
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta h2 {
    font-size: 3rem;
    margin-bottom: 25px;
    font-weight: 800;
    text-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.cta p {
    font-size: 1.3rem;
    margin-bottom: 45px;
    opacity: 0.95;
    text-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* 继续其他样式... */
/* 由于字数限制，我会在下一个文件中添加剩余样式 */