/* ============================================
   Global Styles & Variables
   ============================================ */

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

:root {
    --primary-color: #4a9eff;
    --secondary-color: #3dd6c8;
    --accent-color: #a78bfa;
    --dark-bg: #060d1a;
    --darker-bg: #040609;
    --light-text: #e8eaf0;
    --muted-text: rgba(255, 255, 255, 0.5);
    --light-muted: rgba(255, 255, 255, 0.3);
    --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', Roboto, sans-serif;
    background-color: var(--dark-bg);
    color: var(--light-text);
    line-height: 1.6;
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

/* ============================================
   Container & Grid
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

@media (max-width: 768px) {
    .container {
        padding: 0 24px;
    }
}

/* ============================================
   Navigation Bar
   ============================================ */

.navbar {
    position: sticky;
    top: 0;
    width: 100%;
    background: linear-gradient(180deg, rgba(6, 13, 26, 0.95) 0%, rgba(6, 13, 26, 0.8) 100%);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(74, 158, 255, 0.1);
    z-index: 1000;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    flex-wrap: wrap;
}

.logo-section {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 2px;
    margin: 0;
}

.logo-subtitle {
    font-size: 14px;
    color: var(--primary-color);
    font-weight: 600;
    letter-spacing: 2px;
    margin: 0;
}

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

.nav-menu a {
    color: var(--muted-text);
    text-decoration: none;
    font-size: 14px;
    letter-spacing: 1px;
    transition: color var(--transition);
    position: relative;
}

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

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

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

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 24px;
    cursor: pointer;
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        flex-direction: column;
        gap: 16px;
        width: 100%;
        margin-top: 16px;
    }

    .nav-menu.active {
        display: flex;
    }

    .mobile-toggle {
        display: block;
    }
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 100px 0 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(at 50% 0%, rgba(74, 158, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    animation: fadeInUp 0.8s ease-out;
}

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

.hero-eyebrow {
    font-size: 12px;
    letter-spacing: 4px;
    color: var(--primary-color);
    text-transform: uppercase;
    margin-bottom: 24px;
    opacity: 0.9;
}

.hero-title {
    font-size: 64px;
    font-weight: 700;
    letter-spacing: 2px;
    color: #fff;
    margin-bottom: 8px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--primary-color);
    letter-spacing: 3px;
    margin-bottom: 32px;
    font-weight: 500;
}

.hero-tagline {
    font-size: 48px;
    font-weight: 300;
    line-height: 1.4;
    letter-spacing: 0.5px;
    margin-bottom: 24px;
    color: var(--light-text);
}

.hero-tagline .highlight {
    color: var(--primary-color);
    font-weight: 600;
}

.tagline-sub {
    font-size: 20px;
    color: var(--light-muted);
    display: block;
    font-weight: 300;
    letter-spacing: 1px;
    margin-top: 12px;
}

.location-info {
    display: flex;
    justify-content: center;
    gap: 40px;
    font-size: 14px;
    margin: 32px 0;
    flex-wrap: wrap;
}

.location-item {
    color: var(--muted-text);
    letter-spacing: 0.5px;
}

.cta-button {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--dark-bg);
    border: none;
    padding: 14px 40px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1.5px;
    cursor: pointer;
    border-radius: 4px;
    transition: all var(--transition);
    text-transform: uppercase;
    box-shadow: 0 8px 24px rgba(74, 158, 255, 0.3);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(74, 158, 255, 0.4);
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 40px;
    }

    .hero-tagline {
        font-size: 32px;
    }

    .tagline-sub {
        font-size: 16px;
    }

    .location-info {
        gap: 20px;
    }
}

/* ============================================
   Section Headers
   ============================================ */

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

.section-title {
    font-size: 48px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.section-subtitle {
    font-size: 14px;
    color: var(--primary-color);
    letter-spacing: 3px;
    text-transform: uppercase;
}

/* ============================================
   Business Section
   ============================================ */

.business {
    padding: 100px 0;
    background: linear-gradient(180deg, rgba(74, 158, 255, 0.02) 0%, rgba(61, 214, 200, 0.02) 100%);
    border-top: 1px solid rgba(74, 158, 255, 0.1);
    border-bottom: 1px solid rgba(74, 158, 255, 0.1);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.business-card {
    position: relative;
    background: rgba(74, 158, 255, 0.03);
    border: 1px solid rgba(74, 158, 255, 0.15);
    padding: 32px;
    border-radius: 8px;
    transition: all var(--transition);
    overflow: hidden;
}

.business-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(74, 158, 255, 0.05) 0%, transparent 100%);
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition);
}

.business-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    background: rgba(74, 158, 255, 0.08);
}

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

.card-accent-left {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-color);
}

.business-card:nth-child(2) .card-accent-left {
    background: var(--secondary-color);
}

.business-card:nth-child(3) .card-accent-left {
    background: var(--accent-color);
}

.card-header {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 16px;
}

.card-number {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: 1px;
}

.business-card:nth-child(2) .card-number {
    color: var(--secondary-color);
}

.business-card:nth-child(3) .card-number {
    color: var(--accent-color);
}

.card-category {
    font-size: 12px;
    color: var(--light-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
    flex: 1;
}

.card-title {
    font-size: 22px;
    font-weight: 600;
    color: #fff;
    margin: 16px 0 4px 0;
    letter-spacing: 0.5px;
}

.card-title-en {
    font-size: 12px;
    color: var(--light-muted);
    letter-spacing: 2px;
    margin-bottom: 12px;
    text-transform: uppercase;
}

.card-description {
    color: var(--muted-text);
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 16px;
}

.card-tag {
    display: inline-block;
    font-size: 11px;
    padding: 6px 12px;
    border-radius: 4px;
    background: rgba(74, 158, 255, 0.15);
    color: var(--primary-color);
    letter-spacing: 1px;
    font-weight: 500;
}

.business-card:nth-child(2) .card-tag {
    background: rgba(61, 214, 200, 0.15);
    color: var(--secondary-color);
}

.business-card:nth-child(3) .card-tag {
    background: rgba(167, 139, 250, 0.15);
    color: var(--accent-color);
}

/* ============================================
   Services Section
   ============================================ */

.services {
    padding: 100px 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.service-item {
    background: rgba(74, 158, 255, 0.05);
    border: 1px solid rgba(74, 158, 255, 0.1);
    padding: 32px 24px;
    border-radius: 8px;
    text-align: center;
    transition: all var(--transition);
    cursor: pointer;
}

.service-item:hover {
    transform: translateY(-6px);
    border-color: var(--primary-color);
    background: rgba(74, 158, 255, 0.1);
    box-shadow: 0 12px 32px rgba(74, 158, 255, 0.15);
}

.service-icon {
    font-size: 48px;
    margin-bottom: 16px;
    display: block;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}

.service-item:nth-child(2) .service-icon {
    animation-delay: 0.2s;
}

.service-item:nth-child(3) .service-icon {
    animation-delay: 0.4s;
}

.service-item:nth-child(4) .service-icon {
    animation-delay: 0.6s;
}

.service-item h3 {
    font-size: 18px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 12px;
}

.service-item p {
    font-size: 14px;
    color: var(--muted-text);
    line-height: 1.6;
}

/* ============================================
   Technology Section
   ============================================ */

.technology {
    padding: 100px 0;
    background: linear-gradient(180deg, rgba(167, 139, 250, 0.02) 0%, rgba(74, 158, 255, 0.02) 100%);
    border-top: 1px solid rgba(74, 158, 255, 0.1);
    border-bottom: 1px solid rgba(74, 158, 255, 0.1);
}

.tech-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.tech-highlight {
    background: rgba(74, 158, 255, 0.05);
    border-left: 3px solid var(--primary-color);
    padding: 32px;
    border-radius: 4px;
    transition: all var(--transition);
}

.tech-highlight:nth-child(2) {
    border-left-color: var(--secondary-color);
}

.tech-highlight:nth-child(3) {
    border-left-color: var(--accent-color);
}

.tech-highlight:hover {
    background: rgba(74, 158, 255, 0.1);
    transform: translateX(8px);
}

.tech-highlight h3 {
    font-size: 20px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 12px;
}

.tech-highlight p {
    font-size: 14px;
    color: var(--muted-text);
    margin-bottom: 8px;
}

.tech-desc {
    font-size: 12px;
    color: var(--light-muted) !important;
    font-style: italic;
    margin-top: 12px !important;
}

/* ============================================
   Vision Section
   ============================================ */

.vision {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(74, 158, 255, 0.08) 0%, rgba(61, 214, 200, 0.08) 100%);
}

.vision-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.vision-quote {
    font-size: 28px;
    font-weight: 400;
    color: #fff;
    line-height: 1.8;
    margin: 32px 0;
    padding: 32px;
    border-left: 4px solid var(--primary-color);
    background: rgba(74, 158, 255, 0.05);
    border-radius: 4px;
}

.vision-features {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.feature-icon {
    font-size: 32px;
}

.feature p {
    font-size: 14px;
    color: var(--muted-text);
    letter-spacing: 1px;
}

/* ============================================
   Contact Section
   ============================================ */

.contact {
    padding: 100px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 32px;
    margin-bottom: 60px;
}

.contact-info {
    background: rgba(74, 158, 255, 0.05);
    border: 1px solid rgba(74, 158, 255, 0.1);
    padding: 32px;
    border-radius: 8px;
    transition: all var(--transition);
}

.contact-info:hover {
    transform: translateY(-4px);
    border-color: var(--primary-color);
    background: rgba(74, 158, 255, 0.1);
}

.contact-info h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.contact-info p {
    font-size: 14px;
    color: var(--muted-text);
    line-height: 1.8;
}

.contact-info a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition);
}

.contact-info a:hover {
    color: var(--secondary-color);
}

.contact-form-section {
    background: linear-gradient(135deg, rgba(74, 158, 255, 0.05) 0%, rgba(61, 214, 200, 0.05) 100%);
    border: 1px solid rgba(74, 158, 255, 0.15);
    padding: 48px;
    border-radius: 8px;
    max-width: 600px;
    margin: 0 auto;
}

.contact-form-section h3 {
    font-size: 24px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 24px;
    text-align: center;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-form input,
.contact-form textarea {
    background: rgba(6, 13, 26, 0.6);
    border: 1px solid rgba(74, 158, 255, 0.2);
    color: var(--light-text);
    padding: 12px 16px;
    border-radius: 4px;
    font-family: inherit;
    font-size: 14px;
    transition: all var(--transition);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--light-muted);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(6, 13, 26, 0.8);
    box-shadow: 0 0 12px rgba(74, 158, 255, 0.2);
}

.contact-form button {
    margin-top: 8px;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    background: rgba(6, 13, 26, 0.8);
    border-top: 1px solid rgba(74, 158, 255, 0.1);
    padding: 40px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 32px;
}

.footer-content p {
    font-size: 12px;
    color: var(--light-muted);
    letter-spacing: 0.5px;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    font-size: 12px;
    color: var(--light-muted);
    text-decoration: none;
    transition: color var(--transition);
    letter-spacing: 0.5px;
}

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

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    .section-title {
        font-size: 32px;
    }

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

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

    .tech-highlights {
        grid-template-columns: 1fr;
    }

    .vision-quote {
        font-size: 20px;
        padding: 24px;
    }

    .vision-features {
        gap: 24px;
    }

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

    .contact-form-section {
        padding: 32px 24px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 28px;
        letter-spacing: 1px;
    }

    .hero-tagline {
        font-size: 24px;
    }

    .section-title {
        font-size: 24px;
    }

    .business-card {
        padding: 24px;
    }

    .cta-button {
        padding: 12px 24px;
        font-size: 12px;
    }
}

/* ============================================
   Utility Classes
   ============================================ */

.hidden {
    display: none;
}

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

.mt-40 {
    margin-top: 40px;
}

.mb-40 {
    margin-bottom: 40px;
}