/* ========================
   CSS Variables
   ======================== */
:root {
    --primary: #003366;
    --primary-light: #004080;
    --accent: #0066CC;
    --yellow: #FFB90F;
    --yellow-light: #FFC933;
    --text-dark: #1a1a2e;
    --text-light: #666666;
    --bg-white: #FFFFFF;
    --bg-light: #f8f9fc;
    --bg-lighter: #f0f2f8;
    --border: #e8eaf0;
    --shadow: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
    --radius: 6px;
    --radius-lg: 10px;
    --radius-xl: 16px;
    --transition: all 0.25s ease;
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

/* ========================
   Base Reset
   ======================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-stack);
    font-size: 23px;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-white);
}

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

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

ul {
    list-style: none;
}

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

@media (max-width: 640px) {
    .container {
        padding: 0 16px;
    }
}

section {
    padding: 72px 0;
}

@media (max-width: 768px) {
    section {
        padding: 56px 0;
    }
}

/* ========================
   Header Navigation
   ======================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    position: relative;
}

.logo img {
    height: 40px;
    width: auto;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-list > li {
    position: relative;
}

.nav-list a {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-dark);
    padding: 8px 14px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-list a:hover {
    color: var(--accent);
    background: var(--bg-light);
}

.nav-list a[aria-current="page"] {
    color: var(--accent);
    background: var(--bg-light);
}

.nav-list .has-submenu > a i {
    font-size: 20px;
    margin-left: 2px;
}

.submenu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-white);
    min-width: 160px;
    padding: 6px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: var(--transition);
}

.submenu a {
    padding: 10px 14px;
    font-size: 20px;
    border-radius: var(--radius);
}

.has-submenu:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-dark);
    transition: transform 0.3s ease, opacity 0.3s ease;
    border-radius: 2px;
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 1024px) {
    .menu-toggle {
        display: flex;
    }

    .nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--bg-white);
        padding: 12px 0;
        box-shadow: 0 8px 24px rgba(0,0,0,0.1);
        z-index: 999;
    }

    .nav.active {
        display: block;
    }

    .nav-list {
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 0;
    }

    .nav-list a {
        padding: 12px 16px;
    }

    .submenu {
        position: static;
        display: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        padding-left: 16px;
        margin-top: 4px;
        background: var(--bg-light);
    }

    .submenu.sub-open {
        display: block;
    }

    .submenu a {
        padding: 10px 16px;
    }

    .has-submenu:hover .submenu {
        transform: none;
    }
}

/* ========================
   Buttons
   ======================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 22px;
    font-size: 20px;
    font-weight: 600;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background: var(--yellow-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255,185,15,0.35);
}

.btn-secondary {
    background: rgba(255,255,255,0.15);
    color: var(--bg-white);
    border: 1px solid rgba(255,255,255,0.3);
}

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

.btn-outline {
    background: transparent;
    color: var(--accent);
    border: 1.5px solid var(--accent);
}

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

.btn-whatsapp {
    background: #25D366;
    color: var(--bg-white);
}

.btn-whatsapp:hover {
    background: #20BD5A;
}

.btn-email {
    background: var(--accent);
    color: var(--bg-white);
}

.btn-email:hover {
    background: var(--primary-light);
}

.btn-outline-light {
    background: transparent;
    color: var(--bg-white);
    border: 1.5px solid rgba(255,255,255,0.5);
}

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

/* ========================
   Section Common
   ======================== */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 10px;
}

.section-header p {
    font-size: 24px;
    color: var(--text-light);
}

.section-header-narrow {
    max-width: 860px;
    margin-left: auto;
    margin-right: auto;
}

.section-cta {
    text-align: center;
    margin-top: 40px;
}

/* ========================
   Page Hero
   ======================== */
.page-hero {
    position: relative;
    min-height: 400px;
    display: flex;
    align-items: center;
    margin-top: 64px;
    overflow: hidden;
}

.page-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.page-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0,51,102,0.88) 0%, rgba(0,82,163,0.75) 100%);
    z-index: 1;
}

.page-hero-content {
    position: relative;
    z-index: 2;
    color: var(--bg-white);
    text-align: center;
    padding: 60px 24px;
    width: 100%;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    margin-bottom: 16px;
    border-radius: 999px;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.22);
    color: #fff5cc;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.page-hero-content h1 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 12px;
}

.page-hero-content p {
    font-size: 20px;
    opacity: 0.95;
    max-width: 600px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .page-hero {
        min-height: 300px;
    }

    .page-hero-content h1 {
        font-size: 26px;
    }

    .page-hero-content p {
font-size: 23px;
    }
}

/* ========================
   Footer
   ======================== */
.footer {
    background: linear-gradient(135deg, #e8f0fe 0%, #d4e4fc 50%, #c0d8f9 100%);
    color: var(--text-dark);
    padding: 56px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr 1.4fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    height: 36px;
    margin-bottom: 14px;
    padding: 6px 10px;
    border-radius: var(--radius);
    background: rgba(0, 51, 102, 0.08);
}

.footer-col > p {
    font-size: 20px;
    line-height: 1.7;
    margin-bottom: 14px;
    color: var(--text-dark);
}

.footer-social {
    display: flex;
    gap: 10px;
}

.footer-social a {
    width: 34px;
    height: 34px;
    background: rgba(0,51,102,0.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    color: var(--primary);
}

.footer-social a:hover {
    background: var(--accent);
    color: var(--bg-white);
}

.footer-col h4 {
    font-size: 23px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--primary);
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    font-size: 20px;
    color: var(--text-dark);
}

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

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.footer-contact i {
    color: var(--accent);
    margin-top: 3px;
}

.footer-bottom {
    border-top: 1px solid rgba(0,51,102,0.1);
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    font-size: 24px;
    color: var(--text-light);
}

@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }
}

/* ========================
   Back to Top Button
   ======================== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 42px;
    height: 42px;
    background: var(--accent);
    color: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px);
    transition: var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    background: var(--primary);
    transform: translateY(-2px);
}

@media (max-width: 1024px) {
    .back-to-top {
        display: none;
    }
}

/* ========================
   Pagination
   ======================== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 40px;
    padding: 0;
    list-style: none;
}

.pagination li {
    display: inline-flex;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    font-size: 23px;
    font-weight: 500;
    color: var(--text-dark);
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
}

.pagination a:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(0, 102, 204, 0.05);
}

.pagination .active span {
    color: var(--bg-white);
    background: var(--accent);
    border-color: var(--accent);
}

.pagination .disabled span {
    color: var(--text-light);
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

@media (max-width: 640px) {
    .pagination {
        gap: 4px;
    }

    .pagination a,
    .pagination span {
        min-width: 36px;
        height: 36px;
        padding: 0 8px;
font-size: 20px;
    }
}

/* ========================
   CTA Section
   ======================== */
.cta {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--bg-white);
}

.cta-content {
    text-align: center;
    max-width: 640px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 12px;
}

.cta-content p {
    font-size: 23px;
    opacity: 0.95;
    margin-bottom: 28px;
}

.cta-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .cta-content h2 {
        font-size: 20px;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .cta-buttons .btn {
        width: 100%;
    }
}

/* ========================
   Category Intro
   ======================== */
.category-intro {
    background: var(--bg-light);
    padding: 72px 0;
}

.intro-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    align-items: center;
}

.intro-text h2 {
    font-size: 26px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
}

.intro-text p {
    font-size: 23px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 14px;
}

.intro-stats {
    display: flex;
    gap: 24px;
    margin-top: 28px;
}

.stat-box {
    text-align: center;
    padding: 16px 20px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.stat-box .stat-num {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 4px;
}

.stat-box .stat-label {
    font-size: 23px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.intro-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

@media (max-width: 900px) {
    .intro-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .intro-image {
        order: -1;
    }
}

@media (max-width: 640px) {
    .intro-stats {
        flex-direction: column;
        gap: 12px;
    }

    .stat-box {
        padding: 14px 16px;
    }
}

/* ========================
   Product Grid
   ======================== */
.products {
    background: var(--bg-white);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.product-card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.product-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.product-card img {
    width: 100%;
    height: 150px;
    object-fit: cover;
}

.product-info {
    padding: 18px;
}

.product-info h3 {
    font-size: 23px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 10px;
}

.product-specs {
    margin-bottom: 14px;
}

.product-specs li {
    font-size: 16px;
    color: var(--text-light);
    padding: 4px 0;
    border-bottom: 1px solid var(--border);
}

.product-specs li:last-child {
    border-bottom: none;
}

.product-specs strong {
    color: var(--text-dark);
}

.product-info .btn {
    width: 100%;
}

@media (max-width: 1024px) {
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .product-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================
   Applications Brief
   ======================== */
.applications-brief {
    background: var(--bg-light);
    padding: 72px 0;
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.app-item {
    text-align: center;
    padding: 28px 20px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.app-item:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.app-item i {
    font-size: 28px;
    color: var(--yellow);
    margin-bottom: 14px;
}

.app-item h4 {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 6px;
}

.app-item p {
    font-size: 20px;
    color: var(--text-light);
}

@media (max-width: 1024px) {
    .app-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .app-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================
   Certifications
   ======================== */
.certifications {
    background: var(--bg-white);
    padding: 48px 0;
}

.cert-grid {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.cert-badge {
    text-align: center;
    padding: 20px 28px;
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    min-width: 160px;
    transition: var(--transition);
}

.cert-badge:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.cert-badge i {
    font-size: 32px;
    color: var(--accent);
    margin-bottom: 10px;
}

.cert-badge h4 {
    font-size: 23px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 2px;
}

.cert-badge p {
    font-size: 24px;
    color: var(--text-light);
}

@media (max-width: 768px) {
    .cert-grid {
        gap: 16px;
    }

    .cert-badge {
        min-width: 140px;
        padding: 16px 20px;
    }

    .cert-badge i {
        font-size: 28px;
    }
}

/* ========================
   Hero Banner
   ======================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    margin-top: 64px;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0,51,102,0.88) 0%, rgba(0,82,163,0.75) 100%);
    z-index: 1;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 2;
    color: var(--bg-white);
    text-align: center;
    padding: 60px 24px;
    width: 100%;
}

.hero-title {
    font-size: 42px;
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.hero-subtitle {
    font-size: 20px;
    line-height: 1.7;
    margin-bottom: 32px;
    opacity: 0.95;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

.hero-btns {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.homepage-seo-intro {
    background: linear-gradient(180deg, #ffffff 0%, #f4f8ff 100%);
    padding: 72px 0;
}

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

.homepage-seo-card {
    background: var(--bg-white);
    border: 1px solid rgba(0, 51, 102, 0.08);
    border-radius: 20px;
    padding: 28px;
    box-shadow: var(--shadow-md);
}

.homepage-seo-card-primary {
    background: linear-gradient(135deg, rgba(0,51,102,0.96) 0%, rgba(0,102,204,0.92) 100%);
}

.seo-label {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    margin-bottom: 14px;
    border-radius: 999px;
    background: rgba(0,102,204,0.08);
    color: var(--accent);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.homepage-seo-card-primary .seo-label {
    background: rgba(255,255,255,0.14);
    color: #fff3b0;
}

.homepage-seo-card h3 {
    font-size: 24px;
    color: var(--primary);
    line-height: 1.4;
    margin-bottom: 14px;
}

.homepage-seo-card p,
.homepage-seo-card li {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-dark);
}

.homepage-seo-card-primary h3,
.homepage-seo-card-primary p {
    color: var(--bg-white);
}

.seo-list {
    display: grid;
    gap: 12px;
}

.seo-list li {
    position: relative;
    padding-left: 22px;
}

.seo-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 11px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
}

.seo-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 18px;
}

.homepage-faq-geo {
    background: linear-gradient(180deg, #f8fbff 0%, #edf4ff 100%);
    padding: 72px 0;
}

.faq-grid-home {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.faq-card-home {
    background: var(--bg-white);
    border-radius: 18px;
    padding: 28px;
    border: 1px solid rgba(0, 51, 102, 0.08);
    box-shadow: var(--shadow);
}

.faq-card-home h3 {
    font-size: 22px;
    line-height: 1.45;
    color: var(--primary);
    margin-bottom: 12px;
}

.faq-card-home p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-dark);
}

@media (max-width: 768px) {
    .hero {
        min-height: auto;
        padding: 80px 0;
    }

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

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

    .homepage-seo-grid,
    .faq-grid-home {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .hero-eyebrow {
        font-size: 12px;
        letter-spacing: 0.06em;
    }

    .homepage-seo-card,
    .faq-card-home {
        padding: 22px;
    }

    .homepage-seo-card h3,
    .faq-card-home h3 {
        font-size: 20px;
    }

    .seo-actions .btn {
        width: 100%;
    }
}

/* ========================
   History Story
   ======================== */
.history {
    background: var(--bg-light);
}

.history-wrapper {
    display: flex;
    align-items: center;
    gap: 56px;
    max-width: 1100px;
    margin: 0 auto;
}

.history-badge {
    flex-shrink: 0;
    width: 140px;
    height: 140px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    box-shadow: 0 8px 24px rgba(0,51,102,0.2);
    position: relative;
}

.history-badge::before {
    content: '';
    position: absolute;
    inset: -6px;
    border: 2px dashed var(--yellow);
    border-radius: 50%;
    animation: rotate 25s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.history-badge .year {
    font-size: 40px;
    font-weight: 800;
    line-height: 1;
}

.history-badge .label {
    font-size: 24px;
    text-transform: uppercase;
    letter-spacing: 2px;
    opacity: 0.9;
}

.history-content {
    flex: 1;
}

.history-title {
    font-size: 26px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
}

.history-text {
    margin-bottom: 24px;
}

.history-text .highlight-cn {
    font-size: 24px;
    color: var(--text-dark);
    margin-bottom: 10px;
    font-weight: 500;
}

.history-text .highlight-en {
    font-size: 23px;
    color: var(--accent);
    margin-bottom: 12px;
    line-height: 1.6;
}

.history-text .highlight-en strong {
    color: var(--primary);
    font-weight: 700;
}

.history-text .story-en {
    font-size: 23px;
    color: var(--text-light);
    line-height: 1.7;
    border-left: 3px solid var(--yellow);
    padding-left: 14px;
}

.history-timeline {
    display: flex;
    align-items: center;
    gap: 12px;
}

.timeline-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.timeline-icon {
    width: 44px;
    height: 44px;
    background: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.timeline-icon i {
    font-size: 20px;
    color: var(--accent);
}

.timeline-text {
    font-size: 23px;
    font-weight: 600;
    color: var(--text-dark);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.timeline-line {
    flex: 1;
    height: 2px;
    background: linear-gradient(to right, var(--yellow), var(--accent));
    border-radius: 1px;
}

@media (max-width: 900px) {
    .history-wrapper {
        flex-direction: column;
        text-align: center;
        gap: 32px;
    }

    .history-badge {
        width: 120px;
        height: 120px;
    }

    .history-badge .year {
        font-size: 32px;
    }

    .history-text .story-en {
        border-left: none;
        border-top: 3px solid var(--yellow);
        padding-left: 0;
        padding-top: 14px;
    }
}

@media (max-width: 640px) {
    .history-timeline {
        flex-wrap: wrap;
        justify-content: center;
    }

    .timeline-line {
        display: none;
    }
}

/* ========================
   Product Parameters
   ======================== */
.params {
    background: var(--bg-white);
}

.params-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.param-card {
    background: var(--bg-light);
    padding: 28px 20px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.param-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.param-card i {
    font-size: 28px;
    color: var(--accent);
    margin-bottom: 14px;
}

.param-card h3 {
    font-size: 24px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.param-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 6px;
}

.param-value span {
    font-size: 23px;
    font-weight: 400;
    color: var(--text-light);
}

.param-desc {
    font-size: 24px;
    color: var(--text-light);
}

@media (max-width: 1024px) {
    .params-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .params-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .param-card {
        padding: 20px 14px;
    }

    .param-value {
        font-size: 22px;
    }
}

/* ========================
   How It Works
   ======================== */
.how-it-works {
    background: linear-gradient(135deg, #003366 0%, #004080 100%);
    color: var(--bg-white);
    padding: 72px 0;
}

.how-it-works .section-header h2 {
    color: var(--bg-white);
}

.how-it-works .section-header p {
    color: rgba(255,255,255,0.75);
}

.process-flow {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    margin-top: 48px;
}

.process-step {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
}

.step-number {
    font-size: 23px;
    font-weight: 700;
    color: var(--yellow);
    margin-bottom: 12px;
    letter-spacing: 2px;
}

.step-content {
    background: rgba(255,255,255,0.08);
    padding: 24px 18px;
    border-radius: var(--radius-lg);
    width: 100%;
    transition: var(--transition);
}

.process-step:hover .step-content {
    background: rgba(255,255,255,0.12);
}

.step-icon {
    width: 52px;
    height: 52px;
    background: var(--yellow);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 14px;
}

.step-icon i {
    font-size: 22px;
    color: var(--primary);
}

.step-content h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}

.step-content p {
    font-size: 20px;
    line-height: 1.5;
    opacity: 0.85;
}

.step-arrow {
    position: absolute;
    top: 60px;
    right: -16px;
    color: var(--yellow);
    font-size: 23px;
}

.process-step.last .step-arrow {
    display: none;
}

@media (max-width: 1024px) {
    .process-flow {
        flex-wrap: wrap;
        justify-content: center;
    }

    .process-step {
        width: calc(50% - 16px);
    }

    .step-arrow {
        display: none;
    }
}

@media (max-width: 640px) {
    .process-step {
        width: 100%;
        max-width: 280px;
    }
}

/* ========================
   Client Testimonials
   ======================== */
.testimonials {
    background: var(--bg-white);
    padding: 72px 0;
}

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

.testimonial-card {
    background: var(--bg-light);
    padding: 28px;
    border-radius: var(--radius-lg);
    position: relative;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.testimonial-card:hover {
    border-color: var(--accent);
}

.quote-icon {
    position: absolute;
    top: 20px;
    right: 24px;
    font-size: 24px;
    color: var(--yellow);
    opacity: 0.4;
}

.testimonial-text {
    font-size: 23px;
    line-height: 1.7;
    color: var(--text-dark);
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.testimonial-author img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--yellow);
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-info strong {
    font-size: 23px;
    color: var(--primary);
}

.author-info span {
    font-size: 24px;
    color: var(--text-light);
}

@media (max-width: 1024px) {
    .testimonial-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
}

/* ========================
   Applications (Home)
   ======================== */
.applications {
    background: var(--bg-white);
}

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

.app-text-card {
    background: var(--bg-light);
    border-radius: var(--radius-xl);
    padding: 32px 24px;
    text-align: center;
    border: 1px solid var(--border);
    transition: var(--transition);
    text-decoration: none;
}

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

.app-text-card i {
    font-size: 32px;
    color: var(--accent);
    margin-bottom: 16px;
    transition: var(--transition);
}

.app-text-card:hover i {
    color: var(--yellow);
    transform: scale(1.1);
}

.app-text-card h3 {
    font-size: 21px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 10px;
}

.app-text-card p {
    font-size: 20px;
    color: var(--text-light);
    line-height: 1.6;
}

@media (max-width: 1024px) {
    .app-text-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .app-text-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .app-text-card {
        padding: 24px 20px;
    }

    .app-text-card i {
        font-size: 28px;
    }

    .app-text-card h3 {
        font-size: 24px;
    }
}

/* ========================
   Company Strength
   ======================== */
.strength {
    background: var(--bg-light);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

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

.stat-number {
    font-size: 42px;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 6px;
}

.stat-number::after {
    content: '+';
}

.stat-label {
    font-size: 20px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.strength-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.feature-item {
    text-align: center;
    padding: 24px 16px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.feature-item i {
    font-size: 28px;
    color: var(--yellow);
    margin-bottom: 12px;
}

.feature-item h4 {
    font-size: 23px;
    color: var(--primary);
    margin-bottom: 6px;
}

.feature-item p {
    font-size: 24px;
    color: var(--text-light);
}

@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 640px) {
    .stat-number {
        font-size: 32px;
    }

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

/* ========================
   Vision Section
   ======================== */
.vision {
    background: linear-gradient(135deg, #e8f0fe 0%, #d4e4fc 50%, #c0d8f9 100%);
}

.vision-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.vision-content h2 {
    font-size: 26px;
    color: var(--primary);
    margin-bottom: 16px;
}

.vision-text {
    font-size: 23px;
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: 36px;
}

.vision-values {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.value-item {
    background: var(--bg-white);
    padding: 24px;
    border-radius: var(--radius-lg);
    text-align: center;
}

.value-item i {
    font-size: 26px;
    color: var(--accent);
    margin-bottom: 10px;
}

.value-item h4 {
    font-size: 23px;
    color: var(--primary);
    margin-bottom: 6px;
}

.value-item p {
    font-size: 24px;
    color: var(--text-light);
}

@media (max-width: 768px) {
    .vision-values {
        grid-template-columns: 1fr;
    }

    .vision-content h2 {
        font-size: 22px;
    }
}

/* ========================
   Global Projects (Home)
   ======================== */
.projects {
    background: linear-gradient(135deg, #f0f8ff 0%, #daeeff 50%, #b8dcff 100%);
    padding: 72px 0;
}

.section-header-light {
    text-align: center;
    margin-bottom: 48px;
}

.section-header-light h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 10px;
}

.section-header-light p {
    font-size: 23px;
    color: #000;
}

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

.project-card-row .project-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    text-decoration: none;
    transition: var(--transition);
}

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

.project-card-row .project-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    transition: var(--transition);
}

.project-card-row .project-card:hover img {
    transform: scale(1.04);
}

.project-card-content {
    padding: 24px;
    text-align: center;
}

.project-card-tag {
    display: inline-block;
    padding: 4px 14px;
    background: var(--accent);
    color: var(--bg-white);
    border-radius: 20px;
    font-size: 23px;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.project-card-content h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 10px;
}

.project-card-content p {
    font-size: 23px;
    color: var(--text-light);
    line-height: 1.6;
}

.projects .section-cta {
    margin-top: 40px;
    text-align: center;
}

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

.projects .btn-primary:hover {
    background: var(--yellow-light);
}

@media (max-width: 900px) {
    .project-card-row {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .project-card-row {
        grid-template-columns: 1fr;
    }

    .section-header-light h2 {
        font-size: 24px;
    }
}

/* ========================
   Video Section (Home)
   ======================== */
.videos {
    background: var(--bg-white);
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.video-card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
}

.video-card video {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
}

.video-card .video-thumb {
    position: relative;
    display: block;
    aspect-ratio: 16/9;
    overflow: hidden;
}

.video-card .video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 56px;
    height: 56px;
    background: var(--yellow);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 20px;
    transition: var(--transition);
}

.play-btn:hover {
    transform: translate(-50%, -50%) scale(1.08);
}

.video-info {
    padding: 18px;
}

.video-info h3 {
    font-size: 20px;
    color: var(--primary);
    margin-bottom: 6px;
}

.video-info p {
    font-size: 20px;
    color: var(--text-light);
}

@media (max-width: 768px) {
    .video-grid {
        grid-template-columns: 1fr;
    }

    .video-card .video-thumb {
        aspect-ratio: 16/10;
    }

    .play-btn {
        width: 44px;
        height: 44px;
        font-size: 20px;
    }
}

@media (max-width: 640px) {
    .video-card .video-thumb {
        aspect-ratio: 4/3;
    }
}

/* ========================
   Global Projects Page
   ======================== */
.projects {
    background: linear-gradient(135deg, #f0f8ff 0%, #daeeff 50%, #b8dcff 100%);
    padding: 72px 0;
}

.section-header-light {
    text-align: center;
    margin-bottom: 48px;
}

.section-header-light h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 10px;
}

.section-header-light p {
    font-size: 18px;
    color: #000;
}

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

.project-card-row .project-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    text-decoration: none;
    transition: var(--transition);
}

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

.project-card-row .project-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    transition: var(--transition);
}

.project-card-row .project-card:hover img {
    transform: scale(1.04);
}

.project-card-content {
    padding: 24px;
    text-align: center;
}

.project-card-tag {
    display: inline-block;
    padding: 4px 14px;
    background: var(--accent);
    color: var(--bg-white);
    border-radius: 20px;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.project-card-content h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 10px;
}

.project-card-content p {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.6;
}

.projects .section-cta {
    margin-top: 40px;
    text-align: center;
}

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

.projects .btn-primary:hover {
    background: var(--yellow-light);
}

.stats-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    padding: 72px 0;
}

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

.stats-section .section-header p {
    color: rgba(255,255,255,0.85);
}

.stats-section .stats-grid {
    margin-bottom: 0;
}

.stats-section .stat-label {
    color: rgba(255,255,255,0.85);
}

.stats-section .stat-number {
    color: var(--yellow);
}

@media (max-width: 900px) {
    .project-card-row {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .project-card-row {
        grid-template-columns: 1fr;
    }

    .section-header-light h2 {
        font-size: 24px;
    }
}