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

a {
    text-decoration: none;
}

:root {
    --primary-color: #1e40af;
    --secondary-color: #1e3a8a;
    --accent-color: #0ea5e9;
    --dark-color: #0f172a;
    --light-color: #f8fafc;
    --text-color: #1e293b;
    --text-light: #64748b;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #ffffff;
}

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

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    backdrop-filter: blur(15px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    transition: all 0.4s ease;
}

.header.transparent {
    background: transparent;
    backdrop-filter: blur(0px);
    box-shadow: none;
}

.header.scrolled {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    backdrop-filter: blur(15px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo-img {
    height: 40px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 5px;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 10px 18px;
    color: white;
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: white;
    background-color: rgba(255, 255, 255, 0.15);
}

.values-featured {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    background: white;
    border-radius: 20px;
    overflow: hidden;
    margin-top: 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.values-featured-content {
    padding: 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.values-featured-image {
    position: relative;
    min-height: 500px;
}

.values-featured-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.value-item {
    background: #f8fafc;
    padding: 20px;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.value-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    background: #f1f5f9;
}

.value-icon-box {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 15px;
}

.value-icon-box i {
    color: white;
    font-size: 20px;
}

.value-title {
    font-size: 18px;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 10px;
}

.value-desc {
    font-size: 14px;
    color: #64748b;
    line-height: 1.6;
}

.nav-link i {
    font-size: 10px;
    margin-left: 5px;
}

/* Dropdown Menu */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    padding: 8px 0;
}

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

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 24px;
    color: var(--text-color);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s ease;
}

.dropdown-menu a i {
    width: 20px;
    text-align: center;
    color: var(--primary-color);
    font-size: 16px;
}

.dropdown-menu a:hover {
    background-color: var(--light-color);
    color: var(--primary-color);
    padding-left: 28px;
}

.nav-actions {
    display: flex;
    gap: 15px;
}

.mobile-menu-btn {
    display: none;
    font-size: 24px;
    cursor: pointer;
    color: white;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

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

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

.btn-primary {
    background: white;
    color: var(--primary-color);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
    background: #f0f8ff;
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 8px 20px;
    font-size: 14px;
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.btn-light {
    background: white;
    color: var(--primary-color);
}

.btn-light:hover {
    background: var(--light-color);
}

.btn-hero {
    padding: 14px 32px;
    font-size: 16px;
}

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    overflow: hidden;
}

.hero .hero-title {
    color: white;
}

.hero .hero-subtitle {
    color: rgba(255, 255, 255, 0.85);
}

.hero .btn-hero.btn-primary {
    background: white;
    color: var(--primary-color);
}

.hero .btn-hero.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
}

.hero .btn-hero.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* Page Banner - 统一所有页面的 Banner 样式 */
.page-banner {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8f0fe 100%);
    overflow: hidden;
}

.page-banner .page-title {
    font-size: 42px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 12px;
}

.page-banner .page-subtitle {
    font-size: 18px;
    color: #666;
}

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

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 35px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 15px;
}

.hero-graphic {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.6;
}

.circle-1 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0.05) 100%);
    animation: float 6s ease-in-out infinite;
}

.circle-2 {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0.05) 100%);
    animation: float 6s ease-in-out infinite 1s;
}

.circle-3 {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.03) 100%);
    animation: float 6s ease-in-out infinite 2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-30px); }
}

/* Section Common */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-light);
}

/* Features Section */
.features {
    padding: 100px 0;
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--accent-color) 100%);
    transform: scaleX(0);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 50px rgba(15, 23, 42, 0.1);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
}

.feature-icon i {
    font-size: 28px;
    color: white;
}

.feature-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.feature-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 20px;
}

.feature-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #f1f5f9;
    color: #64748b;
    text-decoration: none;
    transition: all 0.3s ease;
}

.feature-link i {
    font-size: 15px;
    transition: all 0.3s ease;
}

.feature-card:hover .feature-link {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: white;
    transform: scale(1.1);
    box-shadow: 0 8px 20px rgba(0, 102, 204, 0.35);
}

.feature-card:hover .feature-link i {
    transform: translateX(3px);
}

/* Solutions Section */
.solutions-section {
    padding: 100px 0;
    background: var(--light-color);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.solution-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.solution-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 50px rgba(15, 23, 42, 0.12);
}

.solution-image {
    height: 200px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    filter: grayscale(100%);
    transition: all 0.5s ease;
}

.solution-card:hover .solution-image {
    filter: grayscale(70%);
}

.solution-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(145deg, rgba(0, 102, 204, 0.55) 0%, rgba(0, 76, 153, 0.65) 100%);
    z-index: 1;
    transition: all 0.5s ease;
}

.solution-card:hover .solution-overlay {
    background: linear-gradient(145deg, rgba(0, 102, 204, 0.45) 0%, rgba(0, 76, 153, 0.55) 100%);
}

.solution-image i {
    font-size: 72px;
    color: white;
    position: relative;
    z-index: 2;
    filter: drop-shadow(0 4px 12px rgba(0,0,0,0.3));
    transition: all 0.5s ease;
}

.solution-card:hover .solution-image i {
    transform: scale(1.1);
}

.solution-content {
    padding: 30px;
}

.solution-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 12px;
}

.solution-content p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.6;
}

.solution-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #f1f5f9;
    color: #64748b;
    text-decoration: none;
    transition: all 0.3s ease;
}

.solution-link i {
    font-size: 15px;
    transition: all 0.3s ease;
}

.solution-card:hover .solution-link {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: white;
    transform: scale(1.1);
    box-shadow: 0 8px 20px rgba(0, 102, 204, 0.35);
}

.solution-card:hover .solution-link i {
    transform: translateX(3px);
}

a.solution-card {
    text-decoration: none;
    display: block;
    color: inherit;
}

a.solution-card:hover {
    color: inherit;
}

a.solution-card .solution-link {
    text-decoration: none;
}

/* Testimonials Section */
.testimonials {
    padding: 100px 0;
    background: white;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.testimonial-card {
    background: var(--light-color);
    padding: 40px;
    border-radius: 16px;
}

.testimonial-quote {
    color: var(--primary-color);
    font-size: 32px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.testimonial-text {
    font-size: 15px;
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: 25px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.author-info h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--dark-color);
}

.author-info p {
    font-size: 13px;
    color: var(--text-light);
}

/* CTA Section */
.cta {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.cta-content {
    text-align: center;
    color: white;
}

.cta-content h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 15px;
}

.cta-content p {
    font-size: 18px;
    margin-bottom: 35px;
    opacity: 0.9;
}

.cta-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
}

/* Footer */
.footer {
    background: var(--dark-color);
    color: #ffffff;
    padding: 40px 0 20px;
    position: relative;
    z-index: 100;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(6, 1fr);
    gap: 25px;
    margin-bottom: 30px;
    font-size: 13px;
}

.footer-logo img {
    height: 36px;
    margin-bottom: 10px;
}

.footer-desc {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 15px;
    font-size: 12px;
}

.social-links {
    display: flex;
    gap: 10px;
}

.social-links a {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 15px;
}

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

.footer-col ul li {
    margin-bottom: 8px;
}

.footer-col ul a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 12px;
    transition: all 0.2s ease;
}

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

.contact-info li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
}

.contact-info i {
    width: 16px;
    color: var(--accent-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 13px;
    line-height: 1.6;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
    }
    
    .hero-image {
        order: -1;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-menu .nav-link {
        color: white;
    }
    
    .nav-menu .nav-link:hover,
    .nav-menu .nav-link.active {
        background-color: rgba(255, 255, 255, 0.15);
    }
    
    .nav-actions {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        padding: 60px 0;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .features-grid,
    .solutions-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .cta-content h2 {
        font-size: 28px;
    }
    
    .cta-actions {
        flex-direction: column;
    }
}

/* Scroll Animation Styles */
.scroll-animate {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

.scroll-animate.slide-left {
    opacity: 0;
    transform: translateX(-40px);
}

.scroll-animate.slide-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.scroll-animate.slide-right {
    opacity: 0;
    transform: translateX(40px);
}

.scroll-animate.slide-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.scroll-animate.scale-in {
    opacity: 0;
    transform: scale(0.9);
}

.scroll-animate.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

.scroll-animate.fade-in {
    opacity: 0;
    transform: translateY(0);
}

.scroll-animate.fade-in.visible {
    opacity: 1;
}

/* Stagger animations for grid items */
.scroll-animate.stagger-1 { transition-delay: 0.1s; }
.scroll-animate.stagger-2 { transition-delay: 0.2s; }
.scroll-animate.stagger-3 { transition-delay: 0.3s; }
.scroll-animate.stagger-4 { transition-delay: 0.4s; }
.scroll-animate.stagger-5 { transition-delay: 0.5s; }
.scroll-animate.stagger-6 { transition-delay: 0.6s; }
.scroll-animate.stagger-7 { transition-delay: 0.7s; }
.scroll-animate.stagger-8 { transition-delay: 0.8s; }