/* ========================================
   HU LILING LIMITED - Website Styles
   ======================================== */

:root {
    --primary: #005EB8;
    --primary-dark: #004A93;
    --primary-light: #E8F4FD;
    --accent: #6C63FF;
    --accent-green: #00BFA6;
    --accent-red: #FF6B6B;
    --dark: #1A1A2E;
    --dark-lighter: #16213E;
    --gray-900: #212529;
    --gray-700: #495057;
    --gray-500: #6C757D;
    --gray-300: #DEE2E6;
    --gray-100: #F8F9FA;
    --white: #FFFFFF;
    --gradient-primary: linear-gradient(135deg, #005EB8, #6C63FF);
    --gradient-dark: linear-gradient(135deg, #1A1A2E, #16213E);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-sans);
    color: var(--gray-700);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
}

/* ========================================
   Common Components
   ======================================== */

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--primary);
    background: var(--primary-light);
    padding: 6px 16px;
    border-radius: 20px;
    margin-bottom: 20px;
}

.section-tag.light {
    color: var(--white);
    background: rgba(255, 255, 255, 0.15);
}

.section-title {
    font-size: 40px;
    font-weight: 800;
    color: var(--gray-900);
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-title.text-left {
    text-align: left;
}

.section-title.light {
    color: var(--white);
}

.section-desc {
    font-size: 18px;
    color: var(--gray-500);
    line-height: 1.7;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 94, 184, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
}

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

.btn-ghost {
    background: transparent;
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.6);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* Animations */
[data-animate] {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate="fade-right"] {
    transform: translateX(-40px);
}

[data-animate="fade-left"] {
    transform: translateX(40px);
}

[data-animate].animated {
    opacity: 1;
    transform: translate(0, 0);
}

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

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition);
    padding: 16px 0;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
    padding: 8px 0;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: baseline;
    gap: 6px;
    z-index: 1001;
}

.logo-text {
    font-size: 22px;
    font-weight: 800;
    color: var(--white);
    transition: var(--transition);
}

.header.scrolled .logo-text {
    color: var(--gray-900);
}

.logo-badge {
    font-size: 10px;
    font-weight: 700;
    color: var(--primary);
    background: rgba(0, 94, 184, 0.15);
    padding: 2px 8px;
    border-radius: 4px;
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.8);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.header.scrolled .nav-link {
    color: var(--gray-700);
}

.nav-link:hover,
.nav-link.active {
    color: var(--white);
    background: rgba(255, 255, 255, 0.1);
}

.header.scrolled .nav-link:hover,
.header.scrolled .nav-link.active {
    color: var(--primary);
    background: var(--primary-light);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    z-index: 1001;
}

.nav-actions .btn-outline {
    font-size: 13px;
    padding: 8px 20px;
    color: rgba(255, 255, 255, 0.9);
    border-color: rgba(255, 255, 255, 0.3);
}

.header.scrolled .nav-actions .btn-outline {
    color: var(--primary);
    border-color: var(--primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: var(--transition);
}

.header.scrolled .nav-toggle span {
    background: var(--gray-900);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   Hero Banner
   ======================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--dark);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: var(--gradient-dark);
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 94, 184, 0.3), transparent 60%);
    border-radius: 50%;
    animation: pulse 8s ease-in-out infinite;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(108, 99, 255, 0.2), transparent 60%);
    border-radius: 50%;
    animation: pulse 10s ease-in-out infinite reverse;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.hero-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-content {
    position: relative;
    text-align: center;
    z-index: 1;
    padding-top: 80px;
}

.hero-badge {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
    background: rgba(108, 99, 255, 0.1);
    border: 1px solid rgba(108, 99, 255, 0.2);
    padding: 8px 24px;
    border-radius: 30px;
    margin-bottom: 32px;
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    color: var(--white);
    line-height: 1.15;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease 0.1s both;
}

.hero-subtitle {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.65);
    line-height: 1.7;
    margin-bottom: 40px;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    animation: fadeInUp 0.8s ease 0.3s both;
}

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

/* ========================================
   Core Services
   ======================================== */

.services {
    padding: 120px 0;
    background: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.service-card:hover {
    border-color: transparent;
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

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

.service-icon {
    margin-bottom: 24px;
}

.service-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.service-desc {
    font-size: 15px;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
}

.service-link:hover {
    gap: 10px;
}

/* ========================================
   About Us
   ======================================== */

.about {
    padding: 120px 0;
    background: var(--gray-100);
}

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

.about-text {
    font-size: 16px;
    color: var(--gray-700);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-highlights {
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.highlight-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.highlight-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: var(--radius-sm);
}

.highlight-item h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.highlight-item p {
    font-size: 14px;
    color: var(--gray-500);
}

/* Visual Card */
.visual-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-md);
}

.visual-pattern {
    margin-bottom: 32px;
}

.pattern-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.pattern-cell {
    aspect-ratio: 1;
    background: var(--gray-100);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.pattern-cell.active {
    background: var(--gradient-primary);
    animation: cellPulse 3s ease-in-out infinite;
}

@keyframes cellPulse {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

.visual-info {
    display: flex;
    gap: 32px;
}

.info-block {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.info-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
}

/* ========================================
   Statistics
   ======================================== */

.stats {
    padding: 80px 0;
    background: var(--gradient-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.stat-item {
    text-align: center;
    position: relative;
}

.stat-item::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
}

.stat-item:last-child::after {
    display: none;
}

.stat-number {
    font-size: 56px;
    font-weight: 800;
    color: var(--white);
    line-height: 1;
    display: inline;
}

.stat-suffix {
    font-size: 28px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.7);
    display: inline;
}

.stat-label {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.75);
    margin-top: 8px;
    font-weight: 500;
}

/* ========================================
   Industry Solutions
   ======================================== */

.solutions {
    padding: 120px 0;
    background: var(--white);
}

.solutions-tabs {
    max-width: 900px;
    margin: 0 auto;
}

.tab-list {
    display: flex;
    gap: 8px;
    margin-bottom: 40px;
    overflow-x: auto;
    padding-bottom: 4px;
    justify-content: center;
}

.tab-btn {
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 600;
    padding: 12px 28px;
    border: 2px solid var(--gray-300);
    border-radius: 30px;
    background: var(--white);
    color: var(--gray-700);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

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

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

.tab-panel {
    display: none;
    animation: fadeIn 0.4s ease;
}

.tab-panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.solution-card {
    display: flex;
    gap: 48px;
    align-items: flex-start;
    padding: 40px;
    background: var(--gray-100);
    border-radius: var(--radius-xl);
}

.solution-visual {
    flex-shrink: 0;
}

.solution-info h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 16px;
}

.solution-info p {
    font-size: 16px;
    color: var(--gray-700);
    line-height: 1.7;
    margin-bottom: 20px;
}

.solution-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    list-style: none;
}

.solution-tags li {
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-light);
    padding: 6px 16px;
    border-radius: 20px;
}

/* ========================================
   Why Choose Us
   ======================================== */

.advantages {
    padding: 120px 0;
    background: var(--gray-100);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.advantage-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: var(--transition);
    border: 1px solid transparent;
}

.advantage-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.advantage-number {
    font-size: 48px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.3;
    line-height: 1;
    margin-bottom: 20px;
}

.advantage-card:hover .advantage-number {
    opacity: 0.6;
}

.advantage-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.advantage-card p {
    font-size: 15px;
    color: var(--gray-500);
    line-height: 1.7;
}

/* ========================================
   Contact Us
   ======================================== */

.contact {
    padding: 120px 0;
    background: var(--dark);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: start;
}

.contact-desc {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 36px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    font-family: var(--font-sans);
    font-size: 15px;
    color: var(--white);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    outline: none;
    transition: var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.3);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    background: rgba(0, 94, 184, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

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

/* Contact Info Card */
.info-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: 36px;
}

.info-card h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 28px;
}

.info-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    margin-bottom: 24px;
}

.info-item:last-child {
    margin-bottom: 0;
}

.info-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 94, 184, 0.2);
    border-radius: var(--radius-sm);
}

.info-item strong {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 4px;
}

.info-item p {
    font-size: 15px;
    color: var(--white);
    line-height: 1.5;
}

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

.footer {
    background: var(--dark);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 60px;
}

.footer-logo {
    display: inline-flex;
    align-items: baseline;
    gap: 6px;
    margin-bottom: 16px;
}

.footer-desc {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.7;
    max-width: 320px;
}

.footer-links h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 20px;
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links li,
.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

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

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.35);
}

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

@media (max-width: 1024px) {
    .hero-title {
        font-size: 48px;
    }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

    .stat-item:nth-child(2)::after {
        display: none;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

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

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

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

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

    .section-header {
        margin-bottom: 48px;
    }

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

    .hero-subtitle {
        font-size: 17px;
    }

    .hero-subtitle br {
        display: none;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--dark);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 16px;
        transform: translateX(100%);
        transition: transform 0.4s ease;
    }

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

    .nav-menu .nav-link {
        font-size: 20px;
        padding: 12px 32px;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-actions .btn-outline {
        display: none;
    }

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

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

    .solution-card {
        flex-direction: column;
        padding: 28px;
    }

    .tab-list {
        justify-content: flex-start;
    }

    .tab-btn {
        font-size: 14px;
        padding: 10px 20px;
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .services,
    .about,
    .solutions,
    .advantages,
    .contact {
        padding: 80px 0;
    }

    .stats {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }

    .section-title {
        font-size: 26px;
    }

    .stat-number {
        font-size: 40px;
    }

    .stat-suffix {
        font-size: 20px;
    }

    .btn-lg {
        padding: 14px 28px;
        font-size: 15px;
    }

    .container {
        padding: 0 16px;
    }
}