/* CSS Variables */
:root {
    --primary: #246FF3;
    --primary-dark: #1a5ad4;
    --primary-light: #4a8af5;
    --secondary: #1a5ad4;
    --accent: #f59e0b;
    --text: #1f2937;
    --text-light: #6b7280;
    --text-lighter: #9ca3af;
    --bg: #ffffff;
    --bg-light: #f4f7fb;
    --bg-dark: #0d1b33;
    --border: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --font-primary: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;
    --transition-slow: all 0.5s ease;
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text);
    background-color: var(--bg);
    -webkit-font-smoothing: antialiased;
}

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

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

ul { list-style: none; }

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-base);
    font-weight: 500;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    gap: var(--spacing-sm);
}

.btn-more {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 2rem;
    font-size: var(--font-size-base);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: white;
    transition: var(--transition);
    cursor: pointer;
}

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

.btn-more i {
    transition: var(--transition);
}

.btn-more:hover i {
    transform: translateX(4px);
}

/* Section Title */
.section-title-wrap {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-main-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text);
    margin-bottom: var(--spacing-md);
}

.title-underline {
    width: 50px;
    height: 3px;
    background: var(--primary);
    margin: 0 auto;
    border-radius: 2px;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background-color: rgba(0, 0, 0, 0.15);
    transition: var(--transition);
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.5rem var(--spacing-xl);
}

.nav-logo a {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 48px;
    width: auto;
    object-fit: contain;
}

.logo-img.logo-dark {
    display: block !important;
}

.logo-img.logo-light {
    display: none !important;
}

.navbar.scrolled .logo-img.logo-dark {
    display: none !important;
}

.navbar.scrolled .logo-img.logo-light {
    display: block !important;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-2xl);
}

.nav-link {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    position: relative;
}

.navbar.scrolled .nav-link {
    color: var(--text);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 40px;
}

/* Dropdown */
.has-dropdown {
    position: relative;
}

.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 140px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    padding: 6px 0;
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s ease;
    z-index: 100;
}

.has-dropdown:hover > .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.nav-dropdown li a {
    display: block;
    padding: 8px 20px;
    font-size: 14px;
    color: #333;
    white-space: nowrap;
    transition: background 0.2s;
}

.nav-dropdown li a:hover {
    background: #f0f5ff;
    color: var(--primary);
}

.nav-contact {
    display: flex;
    align-items: center;
    position: relative;
    cursor: pointer;
}

.contact-label {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

.navbar.scrolled .contact-label {
    color: var(--text);
}

.contact-qr-popup {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 12px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all 0.25s ease;
    z-index: 10;
    width: 132px;
    height: 132px;
    flex-shrink: 0;
}

.nav-contact:hover .contact-qr-popup {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.qr-img {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-md);
    background: white;
    padding: 6px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    display: block;
    object-fit: contain;
}

.contact-label {
    font-size: var(--font-size-xs);
    color: white;
}

.navbar.scrolled .contact-label {
    color: var(--text);
}

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

.toggle-bar {
    width: 25px;
    height: 3px;
    background-color: white;
    border-radius: 3px;
    transition: var(--transition);
}

.navbar.scrolled .toggle-bar {
    background-color: var(--text);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
}

.hero-slider {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.slider-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 1s ease, visibility 1s ease;
}

.slide.active {
    opacity: 1;
    visibility: visible;
}

.slide-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.slide-img, .slide-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
}

.slide-title {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 5;
    color: #fff;
    font-size: 1.5rem;
    font-weight: 600;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
    white-space: nowrap;
}

.slide-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
}

.play-btn {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    color: var(--primary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.play-btn i {
    margin-left: 4px;
}

.play-btn:hover {
    transform: scale(1.1);
    background: white;
}

.slider-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    gap: 12px;
}

.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
}

.hero-slider:hover .slider-arrow {
    opacity: 1;
}

.slider-arrow:hover {
    background: rgba(255, 255, 255, 0.9);
    color: var(--text);
}

.slider-prev {
    left: 24px;
}

.slider-next {
    right: 24px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background: white;
    transform: scale(1.2);
}

/* Tagline Section */
.tagline {
    padding: var(--spacing-3xl) 0;
    background: white;
    text-align: center;
}

.tagline-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text);
    margin-bottom: var(--spacing-md);
}

.tagline-desc {
    font-size: var(--font-size-lg);
    color: var(--text-light);
}

/* About Section */
.about {
    padding: var(--spacing-3xl) 0 var(--spacing-4xl);
    background: white;
}

.about-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.about-card-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.about-card-en {
    font-size: var(--font-size-sm);
    color: var(--text-lighter);
    margin-bottom: var(--spacing-xl);
}

.about-card-text {
    font-size: var(--font-size-base);
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.about-card-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-img {
    max-width: 100%;
    border-radius: var(--radius-md);
}

.about-mission {
    position: relative;
    text-align: center;
    padding: var(--spacing-3xl) var(--spacing-2xl);
    background: #0a1628;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-2xl);
    overflow: hidden;
    border: 1px solid rgba(36, 111, 243, 0.2);
}

.about-mission::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        linear-gradient(90deg, transparent 49.5%, rgba(36, 111, 243, 0.03) 49.5%, rgba(36, 111, 243, 0.03) 50.5%, transparent 50.5%),
        linear-gradient(0deg, transparent 49.5%, rgba(36, 111, 243, 0.03) 49.5%, rgba(36, 111, 243, 0.03) 50.5%, transparent 50.5%);
    background-size: 60px 60px;
    pointer-events: none;
}

.about-mission::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 10% 50%, rgba(36, 111, 243, 0.25) 0%, transparent 50%),
        radial-gradient(ellipse at 90% 50%, rgba(36, 111, 243, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 0%, rgba(36, 111, 243, 0.1) 0%, transparent 60%);
    pointer-events: none;
}

.about-mission-label {
    display: inline-block;
    position: relative;
    z-index: 1;
    font-size: 12px;
    font-weight: 600;
    color: #4a9eff;
    letter-spacing: 3px;
    margin-bottom: 16px;
    text-transform: uppercase;
    padding: 4px 12px;
    border: 1px solid rgba(74, 158, 255, 0.3);
    border-radius: 4px;
}

.about-mission p {
    position: relative;
    z-index: 1;
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.9);
    line-height: 2;
    letter-spacing: 0.5px;
}

.about-video {
    width: 100%;
}

.video-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #000;
    aspect-ratio: 16/9;
}

.about-section-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.video-poster {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.8;
}

.video-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    color: var(--primary);
    font-size: 1.3rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-play-btn i {
    margin-left: 4px;
}

.video-play-btn:hover {
    transform: translate(-50%, -50%) scale(1.1);
}

/* Products Section */
.products {
    padding: var(--spacing-4xl) 0;
    background: white;
}

.products-banner {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: var(--spacing-xl);
}

.banner-track {
    position: relative;
    width: 100%;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.banner-slide.active {
    position: relative;
    opacity: 1;
    visibility: visible;
}

.banner-slide img {
    width: 100%;
    height: auto;
    display: block;
}

.banner-slide-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px 40px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    color: white;
}

.banner-slide-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: white;
}

.banner-slide-desc {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.6;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.products-banner {
    position: relative;
}

.products-banner .slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.6);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--text);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    opacity: 0;
    backdrop-filter: blur(4px);
}

.products-banner:hover .slider-arrow {
    opacity: 1;
}

.products-banner .slider-arrow:hover {
    background: rgba(255, 255, 255, 0.85);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transform: translateY(-50%) scale(1.1);
}

.products-banner .product-prev {
    left: 16px;
}

.products-banner .product-next {
    right: 16px;
}

.banner-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: var(--spacing-xl);
}

.banner-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.banner-dot.active {
    background: var(--primary);
    transform: scale(1.2);
}

.banner-dot:hover {
    background: var(--primary-light);
}

.products-more {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* Strength Section */
.strength {
    padding: var(--spacing-4xl) 0;
    background: white;
}

.strength-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.strength-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text);
    margin-bottom: var(--spacing-md);
}

.strength-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-light);
}

.strength-grid {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: var(--spacing-2xl);
}

.strength-items {
    display: grid;
    grid-template-columns: 250px 250px;
    gap: var(--spacing-lg);
    justify-content: center;
}

.strength-item {
    width: 250px;
    height: 250px;
    padding: 28px 20px;
    background: white;
    border-radius: var(--radius-md);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.strength-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(36, 111, 243, 0.2);
    border-color: var(--primary);
    background: #246FF3;
}

.strength-item:hover .strength-icon {
    background: white;
    border-radius: 50%;
}

.strength-item:hover .strength-item-title {
    color: white;
}

.strength-item:hover .strength-item-desc {
    color: rgba(255, 255, 255, 0.85);
}

.strength-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.strength-item-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text);
    margin-bottom: var(--spacing-sm);
}

.strength-item-desc {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    line-height: 1.6;
}

.strength-image {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    height: 524px;
}

.strength-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.strength-image-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 40px;
    background: linear-gradient(to top, rgba(13, 27, 51, 0.9) 0%, transparent 100%);
    color: white;
}

.strength-image-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.strength-image-desc {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.8;
}

/* Process Section */
.process {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(180deg, #0d1b33 0%, #152a50 100%);
}

.process-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.process-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-md);
}

.process-subtitle {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.7);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.process-step {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4/3;
    background-size: cover;
    background-position: center;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 30px;
}

.process-step::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(13, 27, 51, 0.85) 0%, rgba(13, 27, 51, 0.2) 100%);
    z-index: 1;
}

.process-step > * {
    position: relative;
    z-index: 2;
}

.step-num {
    font-size: 3rem;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.15);
    line-height: 1;
    margin-bottom: 8px;
}

.step-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: white;
    margin-bottom: 10px;
}

.step-desc {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    margin-bottom: 14px;
}

.step-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.step-tag {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.85);
    background: rgba(36, 111, 243, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 3px 10px;
    border-radius: 20px;
    white-space: nowrap;
}

.process-step-full {
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: 300px;
    background-size: cover;
    background-position: center;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 30px;
    position: relative;
}

.process-step-full::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(13, 27, 51, 0.85) 0%, rgba(13, 27, 51, 0.2) 100%);
    z-index: 1;
}

.process-step-full > * {
    position: relative;
    z-index: 2;
}

.process-step-full .step-num {
    font-size: 3rem;
}

.process-step-full .step-title {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.process-step-full .step-desc {
    font-size: 0.85rem;
}

/* Dev Flow Section */
.dev-flow {
    padding: var(--spacing-4xl) 0;
    background: white;
}

.dev-flow-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.dev-flow-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text);
    margin-bottom: var(--spacing-md);
}

.dev-flow-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-light);
}

.dev-flow-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.dev-tab {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-xl);
    background: #E7EFFF;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
    position: relative;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.dev-tab::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateX(-50%);
}

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

.dev-tab.active {
    color: var(--primary);
}

.dev-tab.active::after {
    width: 100%;
}

.tab-icon {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
}

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

.tab-text strong {
    display: block;
    font-size: var(--font-size-base);
    color: var(--text);
}

.tab-text small {
    font-size: var(--font-size-sm);
    color: var(--text-light);
}

.dev-flow-content {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-md);
    align-items: center;
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

.dev-content-text {
    padding-right: var(--spacing-md);
}

.dev-content-text h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text);
    line-height: 1.5;
    margin-bottom: var(--spacing-sm);
}

.dev-content-en {
    font-size: var(--font-size-sm);
    color: var(--text-lighter);
    text-transform: lowercase;
}

.dev-content-image {
    width: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.dev-flow-img {
    width: 300px;
    height: auto;
    object-fit: contain;
    border-radius: var(--radius-lg);
    display: block;
}

/* Partners Section */
.partners {
    padding: var(--spacing-4xl) 0;
    background: white;
}

.partners-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.partners-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text);
    margin-bottom: var(--spacing-md);
}

.partners-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-light);
}

.partners-orbit {
    position: relative;
    width: 100%;
    height: 380px;
    margin-top: 20px;
}

.orbit-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.partners-orbit .partner-item {
    position: absolute;
    left: var(--x);
    top: var(--y);
    width: 90px;
    height: 90px;
    animation: floatIn 0.6s ease both;
    animation-delay: var(--delay);
}

@keyframes floatIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.partners-orbit .partner-icon {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(36, 111, 243, 0.12);
    transition: all 0.3s ease;
    overflow: hidden;
    padding: 0;
    margin: 0;
    border: none;
}

.partners-orbit .partner-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.partners-orbit .partner-icon:hover {
    transform: scale(1.15);
    box-shadow: 0 8px 30px rgba(36, 111, 243, 0.2);
    border-color: rgba(36, 111, 243, 0.25);
}

/* News Section */
.news {
    padding: var(--spacing-4xl) 0;
    background: white;
}

.news-list {
    margin-bottom: var(--spacing-2xl);
}

.news-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.news-item:hover {
    padding-left: var(--spacing-md);
}

.news-item-title {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text);
}

.news-item-date {
    font-size: var(--font-size-sm);
    color: var(--text-lighter);
    white-space: nowrap;
}

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

/* Contact Section */
.contact-section {
    padding: var(--spacing-4xl) 0;
    background: url('../images/contact-bg.png') center/cover no-repeat;
}

.contact-info-wrap {
    padding-top: var(--spacing-xl);
}

.contact-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-md);
}

.contact-desc {
    font-size: var(--font-size-base);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.contact-qr-img {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-md);
    background: white;
    padding: 8px;
    object-fit: contain;
}

.contact-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-visual-img {
    max-width: 100%;
}

/* Footer styles moved to footer.css */

/* Responsive Design */
@media (max-width: 1024px) {
    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: linear-gradient(135deg, #0d1b33 0%, #1a2a4a 100%);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--spacing-xl);
        transform: translateX(100%);
        transition: transform 0.3s ease;
        z-index: var(--z-modal);
        overflow: hidden;
    }

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

    .nav-link {
        position: relative;
        z-index: 1;
        font-size: 1.5rem;
        font-weight: 500;
        color: rgba(255, 255, 255, 0.85);
        padding: var(--spacing-sm) var(--spacing-xl);
        transition: var(--transition);
        letter-spacing: 1px;
    }

    .navbar.scrolled .nav-link {
        color: rgba(255, 255, 255, 0.85);
    }

    .nav-link:hover,
    .nav-link.active {
        color: #fff;
    }

    .has-dropdown {
        position: static;
    }

    .nav-dropdown {
        position: static;
        transform: none;
        min-width: auto;
        background: transparent;
        border-radius: 8px;
        box-shadow: none;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease, opacity 0.3s ease;
        opacity: 0;
        visibility: hidden;
    }

    .has-dropdown.open > .nav-dropdown {
        max-height: 200px;
        opacity: 1;
        visibility: visible;
    }

    .nav-dropdown li a {
        color: rgba(255, 255, 255, 0.7);
        padding: 8px 24px;
        font-size: 15px;
    }

    .nav-dropdown li a:hover {
        background: rgba(255, 255, 255, 0.1);
        color: #fff;
    }

    .nav-contact {
        display: none;
    }

    .nav-toggle {
        display: flex;
        z-index: var(--z-modal);
        width: 44px;
        height: 44px;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 6px;
    }

    .toggle-bar {
        width: 24px;
        height: 2px;
    }

    .nav-toggle.active .toggle-bar {
        background-color: white;
    }

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

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

    .nav-toggle.active .toggle-bar:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .about-card {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        padding: var(--spacing-xl);
    }

    .strength-grid {
        flex-direction: column;
        gap: var(--spacing-xl);
    }

    .strength-items {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }

    .strength-item {
        width: 100%;
        height: auto;
        min-height: auto;
        padding: var(--spacing-xl) var(--spacing-lg);
    }

    .strength-icon {
        width: 72px;
        height: 72px;
    }

    .strength-item-title {
        font-size: var(--font-size-lg);
    }

    .strength-item-desc {
        font-size: var(--font-size-sm);
    }

    .strength-image {
        height: 350px;
        width: 100%;
    }

    .process-steps {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .dev-flow-content {
        grid-template-columns: 1fr 100px;
        max-width: 350px;
        padding: var(--spacing-sm);
        gap: var(--spacing-sm);
    }

    .dev-content-text h3 {
        font-size: var(--font-size-sm);
    }

    .dev-content-image,
    .dev-flow-img {
        width: 100px;
        max-width: 100px;
        margin: 0;
    }

    .dev-flow-tabs {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-md);
    }

    .contact-qr-code {
        display: flex;
        justify-content: center;
    }

}

@media (max-width: 768px) {
    .section-main-title {
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-sm);
    }

    .tagline-title {
        font-size: var(--font-size-xl);
    }

    .strength-title,
    .process-title,
    .dev-flow-title,
    .partners-title {
        font-size: var(--font-size-xl);
    }

    .tagline {
        padding: var(--spacing-xl) 0;
    }

    .about {
        padding: var(--spacing-xl) 0 var(--spacing-2xl);
    }

    .about-card {
        padding: var(--spacing-lg);
        gap: var(--spacing-lg);
    }

    .about-card-title {
        font-size: var(--font-size-lg);
    }

    .about-card-text {
        font-size: var(--font-size-sm);
        line-height: 1.7;
    }

    .about-mission {
        padding: var(--spacing-xl);
    }

    .about-mission p {
        font-size: var(--font-size-base);
        line-height: 1.7;
    }

    .about-mission-label {
        font-size: 11px;
        letter-spacing: 2px;
    }

    .strength {
        padding: var(--spacing-2xl) 0;
    }

    .strength-header {
        margin-bottom: var(--spacing-xl);
    }

    .strength-subtitle {
        font-size: var(--font-size-sm);
    }

    .strength-grid {
        flex-direction: column;
        gap: var(--spacing-xl);
    }

    .strength-items {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }

    .strength-item {
        width: 100%;
        height: auto;
        min-height: auto;
        padding: var(--spacing-lg) var(--spacing-md);
        text-align: center;
    }

    .strength-icon {
        width: 64px;
        height: 64px;
        margin-bottom: var(--spacing-md);
    }

    .strength-item-title {
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-xs);
    }

    .strength-item-desc {
        font-size: var(--font-size-xs);
        line-height: 1.5;
    }

    .strength-image {
        height: 280px;
        width: 100%;
    }

    .strength-image-content {
        padding: var(--spacing-xl);
    }

    .strength-image-title {
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-sm);
    }

    .strength-image-desc {
        font-size: var(--font-size-sm);
        line-height: 1.6;
    }

    .process {
        padding: var(--spacing-2xl) 0;
    }

    .process-step {
        padding: var(--spacing-lg);
        aspect-ratio: auto;
        min-height: 200px;
    }

    .step-num {
        font-size: 2.5rem;
    }

    .step-title {
        font-size: var(--font-size-lg);
    }

    .step-desc {
        font-size: var(--font-size-sm);
    }

    .process-step-full {
        height: 250px;
        padding: var(--spacing-lg);
    }

    .dev-flow {
        padding: var(--spacing-2xl) 0;
    }

    .dev-tab {
        padding: var(--spacing-sm) var(--spacing-lg);
        width: 100%;
        max-width: 300px;
    }

    .dev-content-text h3 {
        font-size: var(--font-size-lg);
        line-height: 1.4;
    }

    .partners {
        padding: var(--spacing-2xl) 0;
    }

    .partners-orbit {
        height: 300px;
    }

    .news {
        padding: var(--spacing-2xl) 0;
    }

    .news-item {
        padding: var(--spacing-md) 0;
    }

    .news-item-title {
        font-size: var(--font-size-sm);
    }

    .contact-section {
        padding: var(--spacing-2xl) 0;
    }

    .contact-title {
        font-size: var(--font-size-2xl);
    }

    .contact-desc {
        font-size: var(--font-size-sm);
    }

    .product-card {
        grid-template-columns: 1fr;
    }

    .banner-slide-info {
        padding: 20px 24px;
    }

    .banner-slide-title {
        font-size: 1.2rem;
    }

    .banner-slide-desc {
        font-size: 0.85rem;
        -webkit-line-clamp: 1;
    }

    .play-btn {
        width: 60px;
        height: 60px;
        font-size: 1.2rem;
    }

    .slider-arrow {
        width: 40px;
        height: 40px;
        font-size: 0.9rem;
    }

    .slider-prev {
        left: 16px;
    }

    .slider-next {
        right: 16px;
    }

    .hero {
        height: 70vh;
        min-height: 350px;
    }
}

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

    .nav-container {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .logo-img {
        height: 40px;
    }

    .section-main-title {
        font-size: var(--font-size-lg);
    }

    .tagline-title {
        font-size: var(--font-size-lg);
    }

    .strength-title,
    .process-title,
    .dev-flow-title,
    .partners-title {
        font-size: var(--font-size-lg);
    }

    .about-card {
        padding: var(--spacing-md);
        gap: var(--spacing-md);
    }

    .about-card-title {
        font-size: var(--font-size-base);
    }

    .about-card-text {
        font-size: var(--font-size-xs);
    }

    .about-mission {
        padding: var(--spacing-md);
    }

    .about-mission p {
        font-size: var(--font-size-sm);
    }

    .about-mission-label {
        font-size: 10px;
        letter-spacing: 1.5px;
        margin-bottom: 12px;
    }

    .strength-grid {
        flex-direction: column;
        gap: var(--spacing-lg);
    }

    .strength-items {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }

    .strength-item {
        min-height: auto;
        padding: var(--spacing-md) var(--spacing-sm);
    }

    .strength-icon {
        width: 56px;
        height: 56px;
        margin-bottom: var(--spacing-sm);
    }

    .strength-item-title {
        font-size: var(--font-size-sm);
    }

    .strength-item-desc {
        font-size: 0.75rem;
        line-height: 1.4;
    }

    .strength-image {
        height: 220px;
        width: 100%;
    }

    .strength-image-content {
        padding: var(--spacing-md);
    }

    .strength-image-title {
        font-size: var(--font-size-lg);
    }

    .strength-image-desc {
        font-size: var(--font-size-xs);
    }

    .process-step {
        padding: var(--spacing-md);
        min-height: 180px;
    }

    .step-num {
        font-size: 2rem;
    }

    .step-title {
        font-size: var(--font-size-base);
    }

    .process-step-full {
        height: 220px;
        padding: var(--spacing-md);
    }

    .dev-tab {
        max-width: 280px;
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .tab-icon {
        width: 28px;
        height: 28px;
    }

    .tab-text strong {
        font-size: var(--font-size-sm);
    }

    .tab-text small {
        font-size: var(--font-size-xs);
    }

    .dev-content-text h3 {
        font-size: var(--font-size-base);
    }

    .partners-orbit {
        height: 250px;
    }

    .partners-orbit .partner-item {
        width: 56px;
        height: 56px;
    }

    .partners-orbit .partner-icon img {
        width: 36px;
        height: 36px;
    }

    .news-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .news-item-title {
        font-size: var(--font-size-xs);
    }

    .news-item-date {
        font-size: var(--font-size-xs);
    }

    .contact-title {
        font-size: var(--font-size-xl);
    }

    .contact-qr-img {
        width: 100px;
        height: 100px;
    }

    .banner-slide-info {
        padding: 16px 20px;
    }

    .banner-slide-title {
        font-size: 1rem;
    }

    .banner-slide-desc {
        display: none;
    }

    .products-banner .slider-arrow {
        width: 36px;
        height: 36px;
        font-size: 0.85rem;
        opacity: 1;
    }

    .products-banner .product-prev {
        left: 8px;
    }

    .products-banner .product-next {
        right: 8px;
    }

    .hero {
        height: 56.25vw;
        min-height: 200px;
        max-height: 50vh;
    }

    .slider-dots {
        bottom: 20px;
        gap: 8px;
    }

    .dot {
        width: 8px;
        height: 8px;
    }
}

/* Animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 4px 12px rgba(36, 111, 243, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: var(--z-fixed);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(36, 111, 243, 0.4);
}

@media (max-width: 768px) {
    .back-to-top {
        width: 44px;
        height: 44px;
        bottom: 20px;
        right: 20px;
        font-size: 1rem;
    }
}

/* News Loading & Empty State */
.news-loading,
.news-empty {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-light);
    font-size: var(--font-size-base);
}

.news-loading i {
    margin-right: 8px;
    color: var(--primary);
}

/* News Item Title Link */
.news-item-title a {
    color: inherit;
    text-decoration: none;
}

.news-item-title a:hover {
    color: var(--primary);
}

/* ========== Base Utility Classes (from base.css) ========== */
* {
    margin: 0;
    padding: 0;
}

em,
i {
    font-style: normal;
}

li {
    list-style: none;
    white-space: nowrap;
}

img {
    display: block;
    border: 0;
}

button {
    cursor: pointer;
}

a {
    color: #333;
    text-decoration: none;
}

button,
input {
    font-family: Microsoft YaHei, Heiti SC, tahoma, arial, Hiragino Sans GB, sans-serif;
    border: none;
}

body {
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    background-color: #fff;
    font: 12px/1.5 Microsoft YaHei, Heiti SC, tahoma, arial, Hiragino Sans GB, sans-serif;
    color: #666;
    scroll-behavior: smooth;
}

.hide,
.none {
    display: none;
}

.clearfix:after {
    visibility: hidden;
    clear: both;
    display: block;
    content: '.';
    height: 0;
}

.clearfix {
    zoom: 1;
}

.text-hidden-1,
.text-hidden-2,
.text-hidden-3 {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    line-clamp: 1;
}

.text-hidden-2 {
    display: -webkit-box;
    white-space: normal;
    -webkit-line-clamp: 2;
    line-clamp: 2;
}

.text-hidden-3 {
    display: -webkit-box;
    white-space: normal;
    -webkit-line-clamp: 3;
    line-clamp: 3;
}

.layout {
    display: flex;
}

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

.flex-direction {
    flex-direction: column;
    align-items: center;
    justify-content: center;
}