:root {
    --primary-color: #0066ff;
    --primary-dark: #0052cc;
    --secondary-color: #00d4aa;
    --text-dark: #1a1a2e;
    --text-light: #666680;
    --bg-light: #f8f9fc;
    --white: #ffffff;
    --shadow: 0 4px 20px rgba(0, 102, 255, 0.1);
    --shadow-hover: 0 8px 30px rgba(0, 102, 255, 0.2);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

header.scrolled {
    padding: 12px 0;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    transition: padding 0.3s ease;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-dark);
}

.logo-text span {
    color: var(--primary-color);
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 15px;
    position: relative;
    transition: color 0.3s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

.nav-links a:hover::after {
    width: 100%;
}

.language-switcher {
    position: relative;
    margin-left: 24px;
    display: block;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--white);
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-dark);
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background: var(--white);
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 100;
}

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

.lang-option {
    padding: 10px 20px;
    font-size: 14px;
    color: var(--text-dark);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.lang-option:first-child {
    border-radius: 8px 8px 0 0;
}

.lang-option:last-child {
    border-radius: 0 0 8px 8px;
}

.lang-option:hover {
    background: #f5f5f5;
    color: var(--primary-color);
}

.lang-flag {
    width: 20px;
    height: 15px;
    margin-right: 8px;
    vertical-align: middle;
}

.lang-btn .lang-flag {
    margin-right: 6px;
}

.lang-btn .lang-flag {
    margin-right: 6px;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    transition: all 0.3s ease;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, #f0f5ff 0%, #e8fff8 50%, #f0f5ff 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 102, 255, 0.08) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 212, 170, 0.08) 0%, transparent 70%);
    animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(30px, 30px) rotate(5deg); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--white);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 13px;
    color: var(--text-light);
    box-shadow: var(--shadow);
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease;
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    background: var(--secondary-color);
    border-radius: 50%;
    animation: pulse 2s ease infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero h1 {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease 0.1s both;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 36px;
    max-width: 540px;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    animation: fadeInUp 0.8s ease 0.3s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 102, 255, 0.4);
}

.btn-secondary {
    background: var(--white);
    color: var(--text-dark);
    border: 1px solid #e0e0e0;
}

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

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

.hero-visual {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    width: 480px;
    height: 480px;
    animation: fadeInUp 1s ease 0.4s both;
}

.hero-visual::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 30px;
    opacity: 0.1;
    transform: rotate(-6deg);
}

.hero-visual .screen {
    position: absolute;
    inset: 30px;
    background: var(--white);
    border-radius: 20px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    transform: rotate(-6deg);
}

.hero-visual .screen-header {
    height: 30px;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    padding: 0 16px;
    gap: 8px;
}

.hero-visual .screen-header span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #ddd;
}

.hero-visual .screen-content {
    padding: 20px;
}

.hero-visual .code-line {
    height: 12px;
    background: #f0f0f0;
    border-radius: 4px;
    margin-bottom: 10px;
}

.hero-visual .code-line:nth-child(2) { width: 80%; }
.hero-visual .code-line:nth-child(3) { width: 60%; }
.hero-visual .code-line:nth-child(4) { width: 90%; }
.hero-visual .code-line:nth-child(5) { width: 70%; }

.services {
    padding: 100px 0;
    background: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header .label {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.section-header h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-header p {
    font-size: 16px;
    color: var(--text-light);
    max-width: 560px;
    margin: 0 auto;
}

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

.service-card {
    background: var(--white);
    border-radius: 20px;
    padding: 40px 32px;
    border: 1px solid #f0f0f5;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: transparent;
}

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

.service-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(0, 212, 170, 0.1));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 28px;
}

.service-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
}

.service-card p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.7;
}

.features {
    padding: 100px 0;
    background: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 60px;
    align-items: center;
}

.feature-item {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: var(--white);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: var(--shadow);
    flex-shrink: 0;
}

.feature-content h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-content p {
    font-size: 15px;
    color: var(--text-light);
}

.features-visual {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 30px;
    padding: 50px;
    position: relative;
    overflow: hidden;
}

.features-visual::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.features-visual::after {
    content: '';
    position: absolute;
    bottom: -50px;
    left: -50px;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    position: relative;
    z-index: 1;
}

.stat-item {
    text-align: center;
    color: var(--white);
}

.stat-item .number {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 8px;
}

.stat-item .label {
    font-size: 14px;
    opacity: 0.9;
}

.about {
    padding: 100px 0;
    background: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-content h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 24px;
}

.about-content p {
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 32px;
    line-height: 1.8;
}

.about-list {
    list-style: none;
}

.about-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.about-list li::before {
    content: '✓';
    width: 24px;
    height: 24px;
    background: rgba(0, 212, 170, 0.15);
    color: var(--secondary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
}

.about-image {
    background: linear-gradient(135deg, #f0f5ff, #e8fff8);
    border-radius: 30px;
    padding: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.about-image::before {
    content: '';
    position: absolute;
    inset: 20px;
    border: 2px dashed rgba(0, 102, 255, 0.2);
    border-radius: 20px;
}

.about-image-text {
    width: 100%;
    max-width: 300px;
    height: auto;
}

.about-image-text img {
    width: 100%;
    height: auto;
    object-fit: contain;
}

.about-image-label {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 8px;
    color: var(--text-dark);
    margin-top: 16px;
    text-align: center;
}

.contact {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--text-dark), #2a2a4a);
    color: var(--white);
}

.contact .section-header h2 {
    color: var(--white);
}

.contact .section-header p {
    color: rgba(255, 255, 255, 0.7);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 800px;
    margin: 0 auto;
}

.contact-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 36px;
    text-align: center;
    transition: all 0.3s ease;
}

.contact-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 24px;
}

.contact-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.contact-card p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

footer {
    background: #111122;
    color: rgba(255, 255, 255, 0.7);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 300px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand .logo-text {
    color: var(--white);
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.7;
}

.footer-links {
    display: flex;
    gap: 80px;
}

.footer-column h4 {
    color: var(--white);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

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

.footer-column li {
    margin-bottom: 12px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: var(--white);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    font-size: 13px;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
}

.footer-bottom a:hover {
    color: var(--white);
}

@media (max-width: 1024px) {
    .hero-visual {
        display: none;
    }

    .hero-content {
        max-width: 100%;
        text-align: center;
    }

    .hero p {
        margin: 0 auto 36px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .features-grid {
        gap: 40px;
    }

    .about-grid {
        gap: 40px;
    }

    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    nav {
        flex-wrap: wrap;
    }

    .nav-links {
        display: none;
    }

    .language-switcher {
        display: block;
        margin-left: auto;
        margin-right: 12px;
    }

    .menu-toggle {
        display: flex;
    }

    .hero h1 {
        font-size: 36px;
    }

    .section-header h2 {
        font-size: 32px;
    }

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

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

    .features-visual {
        order: -1;
    }

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

    .about-image {
        order: -1;
    }

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

    .footer-content {
        flex-direction: column;
        gap: 40px;
    }

    .footer-links {
        flex-wrap: wrap;
        gap: 40px;
    }
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--white);
    z-index: 999;
    padding: 100px 24px 40px;
}

.mobile-menu.active {
    display: block;
}

.mobile-menu ul {
    list-style: none;
}

.mobile-menu li {
    margin-bottom: 24px;
}

.mobile-menu a {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-dark);
    text-decoration: none;
}

.mobile-close {
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 32px;
    cursor: pointer;
    color: var(--text-dark);
}