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

/* 定义色彩变量 */
:root {
    --primary-color: #0066ff;
    --primary-dark: #0056d6;
    --primary-light: #e0e7ff;
    --secondary-color: #6366f1;
    --secondary-dark: #4f46e5;
    --secondary-light: #ede9fe;
    --accent-color: #8b5cf6;
    --accent-dark: #7c3aed;
    --accent-light: #f3e8ff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --background-light: #f8fafc;
    --background-dark: #f1f5f9;
    --border-color: #e2e8f0;
    --shadow-light: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-dark: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Microsoft YaHei', sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    overflow-x: hidden;
    background: var(--background-light);
    font-weight: 400;
    letter-spacing: -0.02em;
    scroll-behavior: smooth;
}

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

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(24px) saturate(180%);
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-bottom: 1px solid transparent;
    box-shadow: none;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-medium);
    border-bottom-color: var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h2 {
    color: #1a1a1a;
    font-weight: 800;
    font-size: 20px;
    background: linear-gradient(135deg, #0066ff 0%, #6366f1 50%, #8b5cf6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.05em;
    white-space: nowrap;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    font-size: 15px;
    letter-spacing: -0.01em;
}

.nav-link:hover {
    color: var(--primary-color);
    transform: translateY(-1px);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, #0066ff 0%, #6366f1 100%);
    transition: width 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-radius: 2px;
}

.nav-link:hover::after {
    width: 24px;
}

/* 下拉菜单样式 */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    cursor: pointer;
    display: flex;
    align-items: center;
}

.dropdown-toggle::after {
    content: '▼';
    font-size: 10px;
    margin-left: 6px;
    transition: transform 0.3s ease;
}

.dropdown:hover .dropdown-toggle::after {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 180px;
    box-shadow: 0 10px 30px rgba(0, 102, 255, 0.15);
    border-radius: 12px;
    border: 1px solid rgba(0, 102, 255, 0.1);
    padding: 10px 0;
    margin-top: 8px;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

.dropdown-item {
    display: block;
    padding: 12px 20px;
    color: #4a5568;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s ease;
    border-radius: 8px;
    margin: 0 8px;
}

.dropdown-item:hover {
    background: linear-gradient(135deg, #0066ff 0%, #6366f1 100%);
    color: white;
    transform: translateX(4px);
}

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

.bar {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 英雄区域 */
.hero {
    background-image: url('images/beijin.png');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center center;
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}


.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 20%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 70%, rgba(0, 102, 255, 0.1) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.02"><circle cx="30" cy="30" r="1"/></g></svg>');
}

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

.hero-particles {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
}

.hero-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 900px;
    height: 900px;
    background: radial-gradient(circle, rgba(0,102,255,0.18) 0%, rgba(99,102,241,0.12) 40%, transparent 80%);
    filter: blur(60px);
    transform: translate(-50%, -50%);
    z-index: 0;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hero-cta {
    margin-top: 40px;
    text-align: center;
}

.hero h1 {
    font-size: 4.2rem;
    margin-bottom: 32px;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.1;
    background: linear-gradient(135deg, #ffffff, #e0e7ff 50%, #f0f9ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 2px 40px rgba(0, 102, 255, 0.3);
}

.hero p {
    font-size: 1.4rem;
    margin-bottom: 50px;
    opacity: 0.9;
    color: #f1f5f9;
    font-weight: 400;
    letter-spacing: -0.01em;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 0 2px 20px rgba(0, 102, 255, 0.2);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 36px;
    margin: 60px 0;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 992px) {
    .hero-stats {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        max-width: 900px;
    }
}

.stat-item {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px) saturate(180%);
    padding: 40px 32px;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 8px 32px rgba(0, 102, 255, 0.12);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.stat-item:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 16px 48px rgba(0, 102, 255, 0.18);
    border-color: rgba(255, 255, 255, 0.25);
    background: rgba(255, 255, 255, 0.15);
}

.stat-item i {
    font-size: 3.2rem;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #ffffff, #e0e7ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 4px 20px rgba(0, 102, 255, 0.3));
    transition: all 0.3s ease;
    color: #fff;
}

.stat-item h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: #ffffff;
    font-weight: 700;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 20px rgba(0, 102, 255, 0.2);
    transition: all 0.3s ease;
}

.stat-item p {
    font-size: 1rem;
    color: rgba(241, 245, 249, 0.8);
    font-weight: 400;
    transition: all 0.3s ease;
}

.stat-item:hover i {
    transform: scale(1.1) rotate(5deg);
    filter: drop-shadow(0 6px 24px rgba(0, 102, 255, 0.4));
}

.stat-item:hover h3 {
    color: #e0e7ff;
    text-shadow: 0 4px 24px rgba(0, 102, 255, 0.3);
}

.stat-item:hover p {
    color: rgba(255, 255, 255, 0.9);
}

.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, #0066ff 0%, #6366f1 50%, #8b5cf6 100%);
    color: white;
    padding: 20px 52px;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 700;
    font-size: 16px;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: 0 8px 32px rgba(0, 102, 255, 0.25), 0 0 20px rgba(99, 102, 241, 0.4), 0 0 40px rgba(139, 92, 246, 0.2);
    letter-spacing: -0.01em;
    position: relative;
    overflow: hidden;
    border: none;
    cursor: pointer;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.cta-button::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, #0066ff, #6366f1, #8b5cf6, #0066ff);
    border-radius: 22px;
    z-index: -1;
    animation: glowing 3s linear infinite;
    opacity: 0.8;
}

.cta-button::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    width: 180%;
    height: 180%;
    background: radial-gradient(circle,rgba(255,255,255,0.3) 0%,transparent 80%);
    transform: translate(-50%,-50%);
    z-index: 0;
    pointer-events: none;
    opacity: 0.7;
    transition: opacity 0.4s;
}

.cta-button:hover {
    transform: translateY(-6px) scale(1.03);
    box-shadow: 0 12px 40px rgba(0, 102, 255, 0.35), 0 0 30px rgba(99, 102, 241, 0.6), 0 0 60px rgba(139, 92, 246, 0.4);
    background: linear-gradient(135deg, #0056d6 0%, #4f46e5 50%, #7c3aed 100%);
    color: white;
}

.cta-button:active {
    transform: translateY(-2px) scale(0.98);
    box-shadow: 0 4px 24px rgba(0, 102, 255, 0.25), 0 0 15px rgba(99, 102, 241, 0.3), 0 0 30px rgba(139, 92, 246, 0.15);
}

.cta-button:hover::after {
    opacity: 1;
}

@keyframes glowing {
    0% {
        background-position: 0 0;
    }
    50% {
        background-position: 400% 0;
    }
    100% {
        background-position: 0 0;
    }
}

/* CTA按钮容器样式 */
.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 40px;
}

@media (max-width: 768px) {
    .cta-buttons {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }
}

/* 服务项目 */
.services {
    padding: 120px 0;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="40" height="40" viewBox="0 0 40 40" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%230066ff" fill-opacity="0.02"><circle cx="20" cy="20" r="1"/></g></svg>');
    opacity: 0.5;
}

.section-title {
    text-align: center;
    font-size: 3.2rem;
    margin-bottom: 80px;
    color: var(--text-primary);
    position: relative;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 6px;
    background: linear-gradient(90deg, #0066ff 0%, #6366f1 50%, #8b5cf6 100%);
    border-radius: 3px;
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.3);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    background: rgba(255,255,255,0.95);
    box-shadow: 0 8px 32px rgba(0,102,255,0.10), 0 1.5px 8px rgba(0,0,0,0.04);
    border: 1.5px solid rgba(0,102,255,0.08);
    position: relative;
    overflow: visible;
    transition: box-shadow 0.4s, transform 0.4s;
}

.service-card::after {
    content: '';
    position: absolute;
    left: 20px;
    right: 20px;
    bottom: -16px;
    height: 16px;
    background: linear-gradient(90deg,rgba(0,102,255,0.08),rgba(139,92,246,0.08));
    filter: blur(8px);
    border-radius: 50%;
    z-index: 0;
    opacity: 0.7;
    pointer-events: none;
}

.service-card:hover {
    box-shadow: 0 24px 64px rgba(0,102,255,0.18), 0 4px 24px rgba(0,0,0,0.10);
    transform: translateY(-18px) scale(1.03);
    border-color: #6366f1;
}

.service-icon {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    box-shadow: 0 0 24px 0 rgba(99,102,241,0.18);
    border-radius: 24px;
    position: relative;
    overflow: hidden;
}

.service-icon i {
    font-size: 2.6rem;
    color: #fff;
    filter: drop-shadow(0 0 8px #6366f1);
    z-index: 2;
    position: relative;
}

.service-icon::after {
    content: '';
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    bottom: 10px;
    background: radial-gradient(circle,rgba(255,255,255,0.18) 0%,transparent 80%);
    z-index: 1;
    border-radius: 20px;
}

.service-card h3 {
    font-size: 1.75rem;
    margin-bottom: 20px;
    color: #0f172a;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.service-card p {
    color: #64748b;
    margin-bottom: 28px;
    line-height: 1.7;
    font-size: 1.05rem;
    font-weight: 400;
}

.service-features {
    list-style: none;
}

.service-features li {
    padding: 8px 0;
    color: #555;
    position: relative;
    padding-left: 25px;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #0066ff;
    font-weight: bold;
    font-size: 14px;
    width: 18px;
    height: 18px;
    background: linear-gradient(135deg, #0066ff 0%, #6366f1 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 10px;
    top: 2px;
}

/* 关于我们 */
.about {
    padding: 120px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    position: relative;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-size: 3rem;
    margin-bottom: 40px;
    color: #0f172a;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

.about-text p {
    color: #64748b;
    margin-bottom: 24px;
    line-height: 1.8;
    font-size: 1.15rem;
    font-weight: 400;
    letter-spacing: -0.01em;
}

.company-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.stat {
    text-align: center;
    padding: 32px 24px;
    background: white;
    border-radius: 24px;
    border: 1px solid rgba(226, 232, 240, 0.8);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.stat:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.stat h3 {
    font-size: 2.5rem;
    background: linear-gradient(135deg, #0066ff 0%, #6366f1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
    font-weight: 800;
}

.stat p {
    color: #64748b;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: -0.01em;
}

.about-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-placeholder {
    width: 500px;
    height: 400px;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    border-radius: 32px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.15);
    position: relative;
    overflow: hidden;
}

.image-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 30%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
}

.image-placeholder i {
    font-size: 4rem;
    margin-bottom: 20px;
}

.image-placeholder p {
    font-size: 1.2rem;
    font-weight: 500;
}

/* 联系我们 */
.contact {
    padding: 120px 0;
    background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
    position: relative;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: 2.2rem;
    margin-bottom: 40px;
    color: #0f172a;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 32px;
    padding: 32px 28px;
    background: white;
    border-radius: 24px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    border: 1px solid rgba(226, 232, 240, 0.8);
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.contact-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
}

.contact-item i {
    font-size: 1.5rem;
    color: #0066ff;
    margin-right: 24px;
    margin-top: 2px;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #0066ff 0%, #6366f1 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
}

.contact-item h4 {
    color: #2c3e50;
    margin-bottom: 5px;
    font-size: 1.1rem;
}

.contact-item p {
    color: #666;
    margin: 0;
}

.contact-form {
    background: white;
    padding: 48px 44px;
    border-radius: 32px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(226, 232, 240, 0.8);
}

.contact-form h3 {
    font-size: 2.2rem;
    margin-bottom: 40px;
    color: #0f172a;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 18px 20px;
    border: 2px solid #e2e8f0;
    border-radius: 16px;
    font-size: 16px;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    font-family: inherit;
    background: #fafbfc;
    color: #1a1a1a;
    font-weight: 500;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #0066ff;
    background: white;
    box-shadow: 0 0 0 4px rgba(0, 102, 255, 0.1);
    transform: translateY(-1px);
}

.submit-btn {
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px;
    border: none;
    border-radius: 10px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

/* 页脚 */
.footer {
    background: #2c3e50;
    color: white;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
    color: white;
}

.footer-section p,
.footer-section li {
    color: #bdc3c7;
    margin-bottom: 8px;
}

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

.footer-section ul li {
    padding: 5px 0;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #34495e;
    color: #bdc3c7;
}

.footer-section.socials {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-top: 18px;
}

.footer-section.socials a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: #fff;
    font-size: 1.2rem;
    transition: background 0.3s, transform 0.3s;
}

.footer-section.socials a:hover {
    background: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
    transform: scale(1.12);
}

/* 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: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
        gap: 20px;
    }

    .nav-menu.active {
        left: 0;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-stats {
        grid-template-columns: 1fr;
    }

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .company-stats {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .image-placeholder {
        width: 100%;
        height: 250px;
    }

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

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

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 100px 0 60px;
    }

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

    .hero p {
        font-size: 1.1rem;
    }

    .stat-item {
        padding: 20px;
    }

    .contact-form {
        padding: 30px 20px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

/* 滚动平滑 */
html {
    scroll-behavior: smooth;
}

/* 加载动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translate3d(0, 40px, 0);
    }
    to {
        opacity: 1;
        transform: none;
    }
}

.service-card,
.contact-item {
    animation: fadeInUp 0.6s ease forwards;
}

/* 鼠标悬停效果 */
.service-card:hover .service-icon {
    transform: scale(1.1);
    transition: transform 0.3s ease;
}

.stat-item:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

/* 企业优势板块 */
.advantages {
    padding: 100px 0 80px;
    background: linear-gradient(135deg, #f1f5f9 0%, #ffffff 100%);
    position: relative;
}

.advantages::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="40" height="40" viewBox="0 0 40 40" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%230066ff" fill-opacity="0.02"><circle cx="20" cy="20" r="1"/></g></svg>');
    opacity: 0.5;
    pointer-events: none;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-top: 56px;
    position: relative;
    z-index: 1;
}

.advantage-card {
    background: white;
    border-radius: 20px;
    box-shadow: 0 4px 24px rgba(0,102,255,0.08);
    border: 1.5px solid rgba(99,102,241,0.08);
    padding: 32px 24px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
}

.advantage-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 16px 48px rgba(0,102,255,0.16);
    border-color: #6366f1;
}

.advantage-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0066ff 0%, #6366f1 100%);
    color: #fff;
    font-size: 1.8rem;
    border-radius: 16px;
    margin: 0 auto 20px;
    box-shadow: 0 4px 16px rgba(0,102,255,0.18);
    transition: all 0.3s ease;
}

.advantage-card:hover .advantage-icon {
    transform: scale(1.1);
    box-shadow: 0 8px 24px rgba(0,102,255,0.24);
}

.advantage-card h3 {
    font-size: 1.25rem;
    color: #0f172a;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
    transition: color 0.3s ease;
}

.advantage-card:hover h3 {
    color: #0066ff;
}

.advantage-card p {
    color: #64748b;
    font-size: 1.05rem;
    line-height: 1.6;
    font-weight: 400;
}

/* 合作伙伴区域 */
.partners {
    padding: 90px 0 80px;
    background: linear-gradient(90deg, #f8fafc 0%, #e0e7ef 100%);
    position: relative;
}
.partners-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 48px 56px;
    margin-top: 48px;
}
.partner-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    min-width: 120px;
    max-width: 160px;
    transition: transform 0.4s, box-shadow 0.4s;
    background: rgba(255,255,255,0.85);
    border-radius: 18px;
    box-shadow: 0 2px 12px rgba(0,102,255,0.06);
    padding: 18px 20px 10px;
    border: 1.5px solid rgba(99,102,241,0.08);
}
.partner-logo img {
    width: 64px;
    height: 64px;
    object-fit: contain;
    border-radius: 12px;
    background: #f1f5f9;
    box-shadow: 0 2px 8px rgba(0,102,255,0.08);
    transition: box-shadow 0.3s;
}
.partner-logo span {
    font-size: 1.05rem;
    color: #334155;
    font-weight: 600;
    margin-top: 6px;
    letter-spacing: -0.01em;
}
.partner-logo:hover {
    transform: translateY(-8px) scale(1.06);
    box-shadow: 0 8px 32px rgba(0,102,255,0.13);
    border-color: #6366f1;
}
.partner-logo:hover img {
    box-shadow: 0 8px 24px rgba(0,102,255,0.18);
}

/* 案例区域 */
.cases {
    padding: 100px 0 80px;
    background: linear-gradient(135deg, #f1f5f9 0%, #fff 100%);
    position: relative;
}
.cases-list {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    justify-content: center;
    margin-top: 56px;
}
.case-card {
    background: white;
    border-radius: 24px;
    box-shadow: 0 4px 24px rgba(0,102,255,0.08);
    border: 1.5px solid rgba(99,102,241,0.08);
    overflow: hidden;
    max-width: 370px;
    min-width: 300px;
    display: flex;
    flex-direction: column;
    transition: box-shadow 0.4s, transform 0.4s;
    position: relative;
}
.case-card:hover {
    box-shadow: 0 16px 48px rgba(0,102,255,0.16);
    transform: translateY(-10px) scale(1.03);
    border-color: #6366f1;
}
.case-thumb {
    width: 100%;
    height: 180px;
    overflow: hidden;
    background: #e0e7ef;
}
.case-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0 0 18px 18px;
    transition: transform 0.4s;
}
.case-card:hover .case-thumb img {
    transform: scale(1.08) rotate(-1deg);
}
.case-info {
    padding: 28px 24px 24px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.case-info h3 {
    font-size: 1.25rem;
    color: #0f172a;
    font-weight: 700;
    margin-bottom: 4px;
    letter-spacing: -0.01em;
}
.case-info p {
    color: #64748b;
    font-size: 1.05rem;
    line-height: 1.7;
    font-weight: 400;
}

/* 业务服务扩展区 */
.services-extended {
    padding: 100px 0 80px;
    background: linear-gradient(135deg, #f8fafc 0%, #fff 100%);
    position: relative;
}

.services-extended::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="40" height="40" viewBox="0 0 40 40" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%230066ff" fill-opacity="0.02"><circle cx="20" cy="20" r="1"/></g></svg>');
    opacity: 0.5;
    pointer-events: none;
}

.services-extended-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
    margin-top: 56px;
    position: relative;
    z-index: 1;
}

.service-extended-card {
    background: white;
    border-radius: 24px;
    box-shadow: 0 8px 32px rgba(0,102,255,0.12), 0 2px 8px rgba(0,0,0,0.04);
    border: 1.5px solid rgba(99,102,241,0.1);
    padding: 40px 32px 36px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    overflow: hidden;
}

.service-extended-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #0066ff 0%, #6366f1 50%, #8b5cf6 100%);
    transform: scaleX(0);
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

.service-extended-card:hover {
    box-shadow: 0 20px 64px rgba(0,102,255,0.2), 0 4px 16px rgba(0,0,0,0.08);
    transform: translateY(-12px) scale(1.02);
    border-color: #6366f1;
}

.service-extended-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: #fff;
    font-size: 2.2rem;
    border-radius: 20px;
    margin-bottom: 24px;
    box-shadow: 0 4px 16px rgba(99,102,241,0.18);
    transition: all 0.3s ease;
}

.service-extended-card:hover .service-extended-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 8px 24px rgba(99,102,241,0.24);
}

.service-extended-card h3 {
    font-size: 1.35rem;
    color: #0f172a;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    transition: color 0.3s ease;
}

.service-extended-card:hover h3 {
    color: #0066ff;
}

.service-extended-card p {
    color: #64748b;
    font-size: 1.05rem;
    line-height: 1.7;
    font-weight: 400;
    transition: color 0.3s ease;
}

.service-extended-card:hover p {
    color: #475569;
}

/* 资质展示区 */
.certs {
    padding: 100px 0 80px;
    background: linear-gradient(90deg, #f8fafc 0%, #e0e7ef 100%);
    position: relative;
}
.certs-list {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    justify-content: center;
    margin-top: 56px;
}
.cert-card {
    background: white;
    border-radius: 18px;
    box-shadow: 0 4px 24px rgba(0,102,255,0.08);
    border: 1.5px solid rgba(99,102,241,0.08);
    overflow: hidden;
    max-width: 220px;
    min-width: 180px;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 18px 12px 14px;
    transition: box-shadow 0.4s, transform 0.4s;
    position: relative;
}
.cert-card img {
    width: 120px;
    height: 90px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 16px;
    box-shadow: 0 2px 12px rgba(0,102,255,0.10);
    background: #f1f5f9;
}
.cert-card span {
    font-size: 1.05rem;
    color: #334155;
    font-weight: 600;
    text-align: center;
    letter-spacing: -0.01em;
}
.cert-card:hover {
    box-shadow: 0 12px 36px rgba(0,102,255,0.13);
    transform: translateY(-8px) scale(1.05);
    border-color: #6366f1;
}

/* 公司团队区 */
.team {
    padding: 100px 0 80px;
    background: linear-gradient(135deg, #f1f5f9 0%, #fff 100%);
    position: relative;
}
.team-list {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    justify-content: center;
    margin-top: 56px;
}
.team-card {
    background: white;
    border-radius: 22px;
    box-shadow: 0 4px 24px rgba(0,102,255,0.08);
    border: 1.5px solid rgba(99,102,241,0.08);
    overflow: hidden;
    max-width: 260px;
    min-width: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 32px 18px 24px;
    transition: box-shadow 0.4s, transform 0.4s;
    position: relative;
    text-align: center;
}
.team-card img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 50%;
    margin-bottom: 18px;
    box-shadow: 0 2px 12px rgba(0,102,255,0.10);
    background: #f1f5f9;
}
.team-card h3 {
    font-size: 1.15rem;
    color: #0f172a;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: -0.01em;
}
.team-card span {
    font-size: 0.98rem;
    color: #6366f1;
    font-weight: 600;
    margin-bottom: 8px;
    display: block;
}
.team-card p {
    color: #64748b;
    font-size: 0.98rem;
    line-height: 1.6;
    font-weight: 400;
}
.team-card:hover {
    box-shadow: 0 12px 36px rgba(0,102,255,0.13);
    transform: translateY(-8px) scale(1.05);
    border-color: #6366f1;
} 

/* 响应式设计 */
@media (max-width: 768px) {
    /* 导航栏调整 */
    .navbar {
        padding: 20px 0;
    }
    .navbar-container {
        padding: 0 20px;
    }
    .nav-logo h2 {
        font-size: 18px;
    }
    .nav-links {
        display: none;
    }
    .hamburger {
        display: block;
    }
    .hero-content h1 {
        font-size: 2rem;
    }
    .hero-content p {
        font-size: 1.1rem;
    }
    .service-card {
        padding: 32px 24px;
    }
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    .section-title {
        font-size: 2rem;
    }
    /* 企业优势响应式调整 */
    .advantages {
        padding: 80px 0 60px;
    }
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .advantage-card {
        padding: 28px 20px;
    }
    /* 服务扩展区响应式调整 */
    .services-extended {
        padding: 80px 0 60px;
    }
    .services-extended-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .service-extended-card {
        padding: 36px 28px 32px;
    }
    /* 合作伙伴响应式调整 */
    .partners {
        padding: 70px 0 60px;
    }
    .partners-logos {
        gap: 32px;
    }
    .partner-logo {
        width: 120px;
        height: 80px;
    }
    .partner-logo img {
        max-width: 80px;
        max-height: 40px;
    }
}

@media (max-width: 480px) {
    /* 移动端进一步调整 */
    .hero-content h1 {
        font-size: 1.8rem;
    }
    .hero-content p {
        font-size: 1rem;
    }
    .service-card {
        padding: 28px 20px;
    }
    .service-card h3 {
        font-size: 1.2rem;
    }
    .advantage-card {
        padding: 24px 16px;
    }
    .advantage-icon {
        width: 48px;
        height: 48px;
        font-size: 1.5rem;
    }
    .advantage-card h3 {
        font-size: 1.15rem;
    }
    .service-extended-card {
        padding: 32px 24px 28px;
    }
    .service-extended-icon {
        width: 56px;
        height: 56px;
        font-size: 1.8rem;
    }
    .service-extended-card h3 {
        font-size: 1.25rem;
    }
    .section-title {
        font-size: 1.8rem;
    }
}