:root {
    --primary-color: #0ea5e9;
    --secondary-color: #0369a1;
    --text-color: #0f172a;
    --light-text: #64748b;
    --background-color: #ffffff;
    --section-bg: #f8fafc;
    --gradient-primary: linear-gradient(135deg, #0ea5e9 0%, #0369a1 100%);
    --gradient-light: linear-gradient(135deg, #f0f9ff 0%, #e0f7fe 100%);
    --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --shadow-sm: 0 2px 4px rgba(14, 165, 233, 0.1);
    --shadow-md: 0 4px 6px rgba(14, 165, 233, 0.15);
    --shadow-lg: 0 8px 24px rgba(14, 165, 233, 0.2);
    --max-width: 1200px;
    --header-height: 80px;
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --section-gradient: linear-gradient(180deg, rgba(240, 249, 255, 0.8) 0%, rgba(224, 247, 254, 0.6) 100%);
    --section-overlay: radial-gradient(circle at 50% 50%, rgba(14, 165, 233, 0.08) 0%, transparent 70%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background: var(--background-color);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--background-color);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 15px;
}

.logo a {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 2px 2px 8px rgba(14, 165, 233, 0.2);
}

.logo a::before {
    content: '<';
    font-family: 'SF Mono', monospace;
    font-size: 1.2em;
    opacity: 0;
    transform: translateX(10px);
    transition: all 0.3s ease;
    position: absolute;
    left: -1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.logo a::after {
    content: '/>';
    font-family: 'SF Mono', monospace;
    font-size: 1.2em;
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s ease;
    position: absolute;
    right: -2rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.logo a:hover::before,
.logo a:hover::after {
    opacity: 1;
    transform: translateX(0);
}

.logo a:hover {
    transform: scale(1.05);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .logo a {
        font-size: 1.5rem;
        margin-right: 1rem;
    }
    
    .logo a::before {
        left: -1.2rem;
        font-size: 1em;
    }
    
    .logo a::after {
        right: -1.6rem;
        font-size: 1em;
    }
    
    .nav-container {
        padding: 0 15px;
    }

    .lang-switch {
        display: flex;
        align-items: center;
        margin-left: auto;
        gap: 1.2rem;
        padding-left: 1.2rem;
        position: relative;
    }

    .lang-switch::before {
        content: 'AI@ME';
        font-size: 1.3rem;
        font-weight: 700;
        background: var(--gradient-primary);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
        white-space: nowrap;
        letter-spacing: -0.02em;
        text-shadow: 2px 2px 8px rgba(14, 165, 233, 0.2);
    }

    .lang-switch::after {
        content: '';
        position: absolute;
        left: 0;
        top: 50%;
        transform: translateY(-50%);
        width: 1px;
        height: 20px;
        background: rgba(14, 165, 233, 0.2);
    }

    .lang-select {
        min-width: 85px;
        padding: 0.4rem 1.6rem 0.4rem 0.6rem;
        border-color: rgba(14, 165, 233, 0.3);
    }
}

.nav-menu ul {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
    flex-wrap: nowrap;
}

.nav-menu a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 0.5rem 0.8rem;
    border-radius: var(--border-radius-sm);
    white-space: nowrap;
    font-size: 0.95rem;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.contact-link {
    color: var(--text-color);
    font-weight: 500;
}

.contact-link:hover {
    color: var(--primary-color);
    transform: none;
    box-shadow: none;
    background: none;
}

/* Hero Section */
.hero-section {
    padding: calc(var(--header-height) + 60px) 0 80px;
    background: var(--section-gradient);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--section-overlay);
    pointer-events: none;
    opacity: 0.8;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.hero-text {
    text-align: center;
}

.hero-section h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--light-text);
    max-width: 600px;
    margin: 0 auto 2rem;
    line-height: 1.8;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: 2.5rem;
    margin-bottom: 2.5rem;
}

.feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.8);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-lg);
    min-width: 200px;
    border: 1px solid rgba(14, 165, 233, 0.1);
    transition: all 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(14, 165, 233, 0.2);
    background: rgba(255, 255, 255, 0.9);
}

.feature-label {
    font-size: 1.1rem;
    color: var(--primary-color);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.feature-text {
    font-size: 1.2rem;
    color: var(--text-color);
    font-weight: 500;
    text-align: center;
    line-height: 1.4;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.8);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    margin-top: 2rem;
}

.hero-stats .stat-item {
    text-align: center;
    padding: 1rem;
}

.hero-stats .stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    line-height: 1;
}

.hero-stats .stat-desc {
    font-size: 1rem;
    color: var(--light-text);
}

@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
        padding: 0 20px;
    }

    .hero-features {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
    }

    .feature {
        width: 100%;
        max-width: 320px;
    }

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

    .hero-stats .stat-number {
        font-size: 2rem;
    }
}

/* Services Section */
.services-section {
    padding: 100px 0;
    background: var(--section-gradient);
    position: relative;
    overflow: hidden;
    border-top: 1px solid rgba(14, 165, 233, 0.08);
}

.services-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--section-overlay);
    pointer-events: none;
    opacity: 0.8;
}

.services-section h2 {
    text-align: center;
    font-size: 3.5rem;
    margin-bottom: 2rem;
    font-weight: 800;
    position: relative;
    z-index: 1;
    letter-spacing: -0.02em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(14, 165, 233, 0.1);
}

.services-section h2::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
    padding: 20px;
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
}

.service-card {
    background: rgba(255, 255, 255, 0.95);
    padding: 2.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(14, 165, 233, 0.1);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    min-height: 450px;
    width: 100%;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(14, 165, 233, 0.3);
    background: rgba(255, 255, 255, 0.98);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.4s ease;
}

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

.service-card h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    position: relative;
    padding-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1.3;
}

.service-card h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--gradient-primary);
    transition: width 0.4s ease;
}

.service-card:hover h3::after {
    width: 100%;
}

.service-details {
    flex: 1;
    width: 100%;
}

.service-details ul {
    list-style: none;
    padding: 0;
    margin: 0;
    width: 100%;
}

.service-details li {
    margin-bottom: 1.8rem;
    padding-left: 1.8rem;
    position: relative;
    font-weight: 600;
    font-size: 1.15rem;
    color: var(--text-color);
    transition: transform 0.3s ease;
    line-height: 1.4;
}

.service-details li:last-child {
    margin-bottom: 0;
}

.service-details li::before {
    content: "→";
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-size: 1.2em;
    opacity: 0.9;
    transition: all 0.3s ease;
}

.service-details li:hover {
    transform: translateX(5px);
}

.service-details li:hover::before {
    transform: translateX(3px);
    color: var(--secondary-color);
}

.service-details span {
    display: block;
    font-size: 0.95rem;
    color: var(--light-text);
    margin-top: 0.5rem;
    font-weight: normal;
    line-height: 1.6;
    transition: color 0.3s ease;
    max-width: 100%;
    word-break: break-all;
    white-space: normal;
    overflow-wrap: break-word;
    -webkit-hyphens: auto;
    -ms-hyphens: auto;
    hyphens: auto;
}

.service-details li:hover span {
    color: var(--text-color);
}

@media (max-width: 768px) {
    .services-section {
        padding: 80px 0;
    }
    
    .services-section h2 {
        font-size: 2.8rem;
        margin-bottom: 1.5rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 15px;
    }
    
    .service-card {
        min-height: auto;
        padding: 2rem 1.5rem;
    }
    
    .service-card h3 {
        font-size: 1.8rem;
        margin-bottom: 1.2rem;
    }
    
    .service-details li {
        margin-bottom: 1.5rem;
        font-size: 1.1rem;
        padding-left: 1.5rem;
        line-height: 1.3;
    }
    
    .service-details span {
        font-size: 0.92rem;
        line-height: 1.5;
        padding-right: 0.5rem;
    }
}

@media (min-width: 1400px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem;
    }
    
    .service-card {
        min-height: 450px;
        padding: 2.5rem;
    }
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 6px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    margin-left: 1rem;
}

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

/* Footer */
.footer {
    background: var(--gradient-dark);
    color: white;
    padding: 80px 0 20px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 80%, rgba(14, 165, 233, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
    position: relative;
    z-index: 1;
}

.footer-info h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 700;
}

.footer-info p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    font-size: 1.1rem;
}

.footer-contact h4 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: white;
    font-weight: 600;
}

.footer-contact p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    margin-bottom: 0.8rem;
}

.footer-contact p:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.footer-contact p::before {
    content: "→";
    margin-right: 0.8rem;
    color: var(--primary-color);
    font-size: 1.2rem;
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s ease;
}

.footer-contact p:hover::before {
    opacity: 1;
    transform: translateX(0);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    z-index: 1;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.95rem;
}

/* Mobile Menu */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
    cursor: pointer;
    z-index: 1000;
    padding: 0;
    border: none;
    background: none;
    outline: none;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--text-color);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .nav-menu ul {
        gap: 1rem;
    }
    
    .nav-menu a {
        padding: 0.4rem 0.6rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--background-color);
        padding: 1rem;
        transform: translateY(-100%);
        transition: transform 0.3s ease;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .nav-menu ul {
        flex-direction: column;
        align-items: center;
        gap: 0.8rem;
    }

    .nav-menu li {
        width: 100%;
        text-align: center;
    }

    .nav-menu a {
        display: block;
        padding: 0.8rem;
        font-size: 1rem;
    }

    .lang-switch {
        margin: 0.8rem 0;
        width: 100%;
        display: flex;
        justify-content: center;
    }

    .lang-select {
        width: 140px;
        padding: 0.6rem 2rem 0.6rem 1rem;
        font-size: 1rem;
        text-align: center;
    }

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

    .hero-subtitle {
        font-size: 1.1rem;
        padding: 0 20px;
    }

    .hero-features {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
    }

    .feature {
        width: 100%;
        max-width: 320px;
    }

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

    .hero-stats .stat-number {
        font-size: 2rem;
    }

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

    .btn-secondary {
        margin-left: 0;
    }

    .services-grid {
        grid-template-columns: 1fr;
        padding: 10px;
    }
    
    .service-card {
        padding: 1.8rem 1.5rem;
    }
    
    .service-card h3 {
        font-size: 1.4rem;
        margin-bottom: 1rem;
    }
    
    .service-details li {
        margin-bottom: 1.5rem;
        font-size: 1.1rem;
        padding-left: 1.5rem;
        line-height: 1.3;
    }
    
    .service-details span {
        font-size: 0.92rem;
        margin-top: 0.4rem;
        line-height: 1.5;
    }
}

/* Solutions Section */
.solutions-section {
    padding: 100px 0;
    background: var(--section-gradient);
    position: relative;
    overflow: hidden;
    border-top: 1px solid rgba(14, 165, 233, 0.08);
}

.solutions-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--section-overlay);
    pointer-events: none;
    opacity: 0.8;
}

.solutions-section h2 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 800;
    position: relative;
    z-index: 1;
}

.section-desc {
    text-align: center;
    color: var(--light-text);
    font-size: 1.2rem;
    line-height: 1.6;
    max-width: 800px;
    margin: 0 auto 2rem;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.2rem;
    padding: 10px;
    position: relative;
    z-index: 1;
}

.solution-card {
    background: rgba(255, 255, 255, 0.95);
    padding: 1.5rem;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(14, 165, 233, 0.1);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.solution-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(14, 165, 233, 0.2);
}

.solution-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.solution-card:hover::before {
    opacity: 1;
}

.solution-card h3 {
    font-size: 1.4rem;
    margin-bottom: 0.8rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    position: relative;
    padding-bottom: 0.5rem;
}

.solution-card h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

.solution-card:hover h3::after {
    width: 100%;
}

.solution-desc {
    color: var(--light-text);
    margin-bottom: 1.2rem;
    line-height: 1.5;
    font-size: 1rem;
}

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

.solution-features li {
    margin-bottom: 0.8rem;
    padding-left: 1.2rem;
    position: relative;
    font-weight: 500;
    font-size: 0.95rem;
    transition: transform 0.3s ease;
}

.solution-features li:hover {
    transform: translateX(5px);
}

.solution-features li::before {
    content: "→";
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-size: 1.1em;
    transition: transform 0.3s ease;
}

.solution-features li:hover::before {
    transform: translateX(3px);
}

.solution-features span {
    display: block;
    font-size: 0.9rem;
    color: var(--light-text);
    margin-top: 0.3rem;
    font-weight: normal;
    line-height: 1.5;
}

@media (max-width: 768px) {
    .solutions-section {
        padding: 60px 0;
    }
    
    .solutions-section h2 {
        font-size: 2.2rem;
    }
    
    .section-desc {
        font-size: 1rem;
        padding: 0 15px;
        margin-bottom: 1.5rem;
    }
    
    .solutions-grid {
        gap: 1rem;
        padding: 8px;
    }
    
    .solution-card {
        padding: 1.2rem;
    }
    
    .solution-card h3 {
        font-size: 1.3rem;
    }
    
    .solution-features li {
        font-size: 0.9rem;
        margin-bottom: 0.6rem;
    }
    
    .solution-features span {
        font-size: 0.85rem;
    }
}

/* Advantages Section */
.advantages-section {
    padding: 100px 0;
    background: var(--section-gradient);
    position: relative;
    overflow: hidden;
    border-top: 1px solid rgba(14, 165, 233, 0.08);
}

.advantages-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--section-overlay);
    pointer-events: none;
    opacity: 0.8;
}

.advantages-section h2 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 800;
    position: relative;
    z-index: 1;
    letter-spacing: -0.02em;
}

.section-desc {
    text-align: center;
    color: var(--light-text);
    font-size: 1.2rem;
    line-height: 1.6;
    max-width: 800px;
    margin: 0 auto 2rem;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    padding: 10px;
    margin-top: 1rem;
    position: relative;
    z-index: 1;
}

.advantage-card {
    background: rgba(255, 255, 255, 0.95);
    padding: 1.8rem;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: left;
    border: 1px solid rgba(14, 165, 233, 0.1);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(14, 165, 233, 0.3);
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.advantage-card:hover::before {
    opacity: 1;
}

.advantage-card h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    position: relative;
    padding-bottom: 0.8rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.advantage-card h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--gradient-primary);
    transition: width 0.4s ease;
}

.advantage-card:hover h3::after {
    width: 100%;
}

.advantage-card p {
    color: var(--light-text);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.advantage-features {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.advantage-features li {
    background: rgba(14, 165, 233, 0.08);
    padding: 0.6rem 1.2rem;
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    color: var(--primary-color);
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.advantage-features li::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.advantage-features li:hover {
    color: white;
    transform: translateY(-2px);
    border-color: rgba(14, 165, 233, 0.2);
}

.advantage-features li:hover::before {
    opacity: 1;
}

@media (max-width: 768px) {
    .advantages-section h2 {
        font-size: 2.5rem;
    }
    
    .section-desc {
        font-size: 1.1rem;
        margin-bottom: 2rem;
        padding: 0 1rem;
    }
    
    .advantages-grid {
        gap: 1rem;
    }
    
    .advantage-card {
        padding: 1.5rem;
    }
    
    .advantage-card h3 {
        font-size: 1.6rem;
    }
    
    .advantage-features li {
        padding: 0.5rem 1rem;
        font-size: 0.95rem;
    }
}

/* About Section */
.about-section {
    padding: 100px 0;
    background: var(--section-gradient);
    position: relative;
    overflow: hidden;
    border-top: 1px solid rgba(14, 165, 233, 0.08);
}

.about-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--section-overlay);
    pointer-events: none;
    opacity: 0.8;
}

.about-content {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.about-text {
    flex: 1;
}

.about-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.company-intro {
    font-size: 1.2rem;
    color: var(--light-text);
    margin-bottom: 3rem;
    line-height: 1.8;
}

.company-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature-item {
    padding: 1.5rem;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-radius: 12px;
}

.feature-item h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.feature-item p {
    color: var(--light-text);
    line-height: 1.6;
}

.company-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    text-align: center;
    margin-top: 3rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

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

@media (max-width: 768px) {
    .advantages-grid {
        grid-template-columns: 1fr;
        padding: 10px;
    }
    
    .company-features {
        grid-template-columns: 1fr;
    }
    
    .company-stats {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .about-content {
        flex-direction: column;
        gap: 2rem;
    }
    
    .about-text h2,
    .advantages-section h2 {
        font-size: 2rem;
    }
    
    .company-intro {
        font-size: 1.1rem;
    }
}

/* Cooperation Section */
.cooperation-section {
    padding: 100px 0;
    background: var(--section-gradient);
    position: relative;
    overflow: hidden;
    border-top: 1px solid rgba(14, 165, 233, 0.08);
}

.cooperation-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--section-overlay);
    pointer-events: none;
    opacity: 0.8;
}

.cooperation-section h2 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 800;
    position: relative;
    z-index: 1;
}

.timeline-container {
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    padding: 0 20px;
    z-index: 1;
}

.cooperation-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    position: relative;
    padding: 20px;
    max-width: 1400px;
    margin: 0 auto;
}

.step-card {
    background: rgba(255, 255, 255, 0.95);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(14, 165, 233, 0.1);
    border-radius: var(--border-radius-lg);
    padding: 2.5rem;
    position: relative;
    transition: all 0.3s ease;
    overflow: hidden;
    min-height: 320px;
    display: flex;
    flex-direction: column;
}

.step-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(14, 165, 233, 0.2);
}

.step-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.step-card:hover::before {
    opacity: 1;
}

.step-number {
    font-size: 4rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    opacity: 0.2;
    position: absolute;
    top: -1rem;
    right: 1rem;
    line-height: 1;
    font-family: 'SF Mono', monospace;
    transition: opacity 0.3s ease;
}

.step-card:hover .step-number {
    opacity: 0.4;
}

.step-content h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    position: relative;
    z-index: 1;
}

.step-content p {
    font-size: 0.95rem;
    color: var(--light-text);
    line-height: 1.6;
    margin-bottom: 1.2rem;
}

.step-details {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.step-details li {
    font-size: 0.9rem;
    color: var(--primary-color);
    background: rgba(14, 165, 233, 0.1);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.step-details li:hover {
    background: rgba(14, 165, 233, 0.15);
    transform: translateY(-2px);
    border-color: rgba(14, 165, 233, 0.2);
}

@media (max-width: 1200px) {
    .cooperation-steps {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .cooperation-section h2 {
        font-size: 2.2rem;
    }
    
    .cooperation-steps {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 15px;
    }
    
    .step-card {
        padding: 2rem;
        min-height: auto;
    }
    
    .step-number {
        font-size: 3rem;
        top: -0.8rem;
        right: 0.8rem;
    }
    
    .step-content h3 {
        font-size: 1.1rem;
    }
    
    .step-content p {
        font-size: 0.9rem;
    }
    
    .step-details li {
        font-size: 0.8rem;
    }
}

/* 标题通用样式 */
h1, h2, h3, h4, h5, h6 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: -0.02em;
}

/* 卡片通用样式 */
.card {
    background: rgba(255, 255, 255, 0.9);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* 语言切换样式 */
.lang-switch {
    position: relative;
    margin-left: 1rem;
}

.lang-select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background: transparent;
    border: 1px solid var(--primary-color);
    border-radius: 4px;
    color: var(--text-color);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 0.4rem 1.8rem 0.4rem 0.8rem;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%230ea5e9' d='M2.293 4.293a1 1 0 011.414 0L6 6.586l2.293-2.293a1 1 0 111.414 1.414l-3 3a1 1 0 01-1.414 0l-3-3a1 1 0 010-1.414z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 12px;
    min-width: 90px;
    max-width: 120px;
}

.lang-select:hover,
.lang-select:focus {
    border-color: var(--secondary-color);
    outline: none;
    box-shadow: var(--shadow-sm);
}

.lang-select option {
    background: var(--background-color);
    color: var(--text-color);
    padding: 8px;
}

/* RTL Support for Arabic */
[lang="ar"] {
    direction: rtl;
    text-align: right;
}

[lang="ar"] .nav-list {
    flex-direction: row-reverse;
}

[lang="ar"] .hero-content {
    text-align: right;
}

[lang="ar"] .features-grid,
[lang="ar"] .solutions-grid,
[lang="ar"] .advantages-grid {
    direction: rtl;
}

[lang="ar"] .feature-card,
[lang="ar"] .solution-card,
[lang="ar"] .advantage-card {
    text-align: right;
}

[lang="ar"] .stats-container {
    direction: rtl;
}

[lang="ar"] .footer-content {
    text-align: right;
}

[lang="ar"] .lang-select {
    direction: ltr; /* Keep language selector left-to-right */
}