/* ===== CSS Variables / Design Tokens ===== */
:root {
    --color-primary: #073f94;
    --color-primary-hover: #052d6e;
    --color-secondary: #1a5fb4;
    --color-accent: #e8720c;
    --color-bg: #ffffff;
    --color-surface: #f5f7fa;
    --color-dark: #0a1628;
    --color-text: #1a1a2e;
    --color-muted: #6b7280;
    --color-border: #e5e7eb;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;

    --font-en: 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-cn: 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', sans-serif;
    --font-family: var(--font-cn), var(--font-en);

    --container-max: 1400px;
    --section-spacing: 80px;
    --section-padding: 60px 0;
    --card-radius: 8px;
    --btn-radius: 6px;
    --card-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    --card-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
    --transition: 0.3s ease;
    --grid-gap: 24px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: 15px;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

input,
textarea {
    font-family: inherit;
    font-size: inherit;
}

/* ===== Container ===== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text);
}

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

.section-tag.light {
    color: rgba(255, 255, 255, 0.7);
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
}

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

.section-title.light {
    color: #ffffff;
}

.section-desc {
    font-size: 16px;
    color: var(--color-muted);
    max-width: 600px;
}

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

.section-desc.light {
    color: rgba(255, 255, 255, 0.7);
}

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

.section-header .section-desc {
    margin: 0 auto;
}

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

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--btn-radius);
    transition: all var(--transition);
    white-space: nowrap;
    line-height: 1;
}

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

.btn-primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(7, 63, 148, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: #ffffff;
    transform: translateY(-2px);
}

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

.btn-block {
    width: 100%;
}

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition);
}

.header.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
    gap: 16px;
}

.logo {
    flex-shrink: 0;
}

.logo img {
    height: auto;
    width: 150px;
    display: block;
}

/* Desktop navigation within header */
.header-nav {
    flex: 1;
    display: flex;
    justify-content: center;
    min-width: 0;
}

.header-nav .nav-list {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    list-style: none;
    margin: 0;
    padding: 0;
    height: 76px;
}

.header-nav .nav-list .nav-item {
    list-style: none;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

/* ===== Mobile Nav Overlay ===== */
.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1002;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 60px 20px 20px;
    overflow-y: auto;
}

.mobile-nav.nav-open {
    display: block;
}

.mobile-nav .nav-close {
    position: fixed;
    top: 12px;
    right: 12px;
    width: 44px;
    height: 44px;
    font-size: 28px;
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1003;
}

.mobile-nav-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mobile-nav-list .nav-item a {
    display: block;
    padding: 16px 20px;
    font-size: 18px;
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    border-radius: 8px;
    transition: all var(--transition);
}

.mobile-nav-list .nav-item a:hover,
.mobile-nav-list .nav-item a.active {
    background: var(--color-surface);
    color: var(--color-primary);
}

/* ===== Old .nav styles (kept for backward compat, hidden) ===== */
.nav {
    display: none;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text);
    border-radius: 4px;
    transition: all var(--transition);
    position: relative;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 16px;
    right: 16px;
    height: 2px;
    background: var(--color-primary);
    border-radius: 1px;
}

.nav-arrow {
    font-size: 10px;
    margin-left: 4px;
    transition: transform var(--transition);
}

.nav-dropdown:hover .nav-arrow {
    transform: rotate(180deg);
}

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

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 180px;
    background: #ffffff;
    border-radius: var(--card-radius);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 100;
}

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



.dropdown-menu li a {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
    color: var(--color-text);
    transition: all var(--transition);
}

.dropdown-menu li a:hover {
    background: var(--color-surface);
    color: var(--color-primary);
    padding-left: 24px;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.lang-toggle {
    padding: 6px 14px;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    border: 1.5px solid var(--color-primary);
    border-radius: 4px;
    transition: all var(--transition);
}

.lang-toggle:hover {
    background: var(--color-primary);
    color: #ffffff;
}

.header-cta {
    padding: 10px 22px;
    font-size: 14px;
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
}

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

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

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

/* ===== Hero ===== */
.hero {
    position: relative;
    height: 100dvh;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
    margin-top: 76px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1.2s ease-in-out;
}

.hero-slide-active {
    opacity: 1;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: transparent;
}

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

.hero-tag {
    font-size: 23px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: #000000;
    margin-bottom: 20px;
}

.hero-title {
    font-size: 52px;
    font-weight: 700;
    color: #000000;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-desc {
    font-size: 19px;
    color: #000000;
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 560px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-actions .btn-outline {
    color: #000000;
    border-color: rgba(0, 0, 0, 0.5);
}

.hero-actions .btn-outline:hover {
    background: #000000;
    color: #ffffff;
    border-color: #000000;
}

.hero-dots {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 1;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all var(--transition);
}

.dot.active {
    background: #ffffff;
    width: 28px;
    border-radius: 5px;
}

/* ===== Section Base ===== */
.section {
    padding: var(--section-padding);
}

/* ===== Products Section ===== */
.section-products {
    background: var(--color-bg);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--grid-gap);
}

/* ===== Product Carousel ===== */
.product-carousel-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    gap: 16px;
}

.product-carousel-viewport {
    overflow: hidden;
    flex: 1;
    padding: 30px 0;
    margin: -30px 0;
}

.product-carousel-track {
    display: flex;
    gap: 30px;
    transition: transform 0.5s ease;
}

.product-carousel-track .product-card {
    flex: 0 0 calc(100% / 9);
}

.carousel-btn {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #ffffff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    z-index: 10;
}

.carousel-btn:hover {
    background: var(--color-primary-hover);
    transform: scale(1.1);
}

.carousel-btn svg {
    width: 20px;
    height: 20px;
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 24px;
}

.carousel-dots .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-border);
    cursor: pointer;
    transition: all var(--transition);
}

.carousel-dots .dot.active {
    background: var(--color-primary);
    width: 28px;
    border-radius: 5px;
}

.product-card {
    background: #ffffff;
    border-radius: var(--card-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: all var(--transition);
}

.product-card:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--card-shadow-hover);
}

.product-card-img {
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.product-card-img img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: transform 0.5s ease;
}

.product-card:hover .product-card-img img {
    transform: scale(1.05);
}

.product-card-body {
    padding: 20px;
}

.product-card-body h3 {
    font-size: 18px;
    margin-bottom: 4px;
}

.product-card-body p {
    font-size: 13px;
    color: var(--color-muted);
}

/* ===== Combined Advantages + Certifications Section ===== */
.section-combined {
    position: relative;
    background: var(--color-dark);
    overflow: hidden;
}

.combined-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.combined-bg img {
    width: 100%;
    height: 120%;
    object-fit: cover;
    transform: translateY(0);
    will-change: transform;
}

.combined-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10, 22, 40, 0.88) 0%, rgba(7, 63, 148, 0.82) 50%, rgba(10, 22, 40, 0.90) 100%);
    z-index: 1;
}

.section-combined .container {
    position: relative;
    z-index: 2;
}

.section-combined .section-title.light {
    color: #ffffff;
}

.section-combined .section-desc.light {
    color: rgba(255, 255, 255, 0.65);
}

.combined-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px 0;
}

.combined-divider span {
    display: block;
    width: 80px;
    height: 1px;
    background: rgba(255, 255, 255, 0.2);
}

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

.advantage-card {
    background: #ffffff;
    border-radius: 12px;
    padding: 36px 28px 28px;
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.advantage-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
}

.advantage-card-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    flex-shrink: 0;
}

.advantage-card-icon svg {
    width: 28px;
    height: 28px;
    stroke: #ffffff;
}

.advantage-card h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 10px;
}

.advantage-card p {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.6;
    margin-bottom: 20px;
    flex: 1;
}

/* Dark variant cards inside combined section */
.advantage-card-dark {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.advantage-card-dark:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.advantage-card-dark h4 {
    color: #ffffff;
}

.advantage-card-dark p {
    color: rgba(255, 255, 255, 0.6);
}

.cert-item-dark {
    border-color: rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
}

.cert-item-dark:hover {
    border-color: rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.08);
}

.cert-item-dark h4 {
    color: #ffffff;
}

.cert-item-dark p {
    color: rgba(255, 255, 255, 0.55);
}

.cert-item-dark .cert-icon {
    color: var(--color-accent);
}

.advantage-item {
    background: #ffffff;
    padding: 28px 24px;
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
    transition: all var(--transition);
}

.advantage-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
}

.advantage-icon {
    width: 48px;
    height: 48px;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.advantage-icon svg {
    width: 100%;
    height: 100%;
}

.advantage-item h4 {
    font-size: 16px;
    margin-bottom: 8px;
}

.advantage-item p {
    font-size: 13px;
    color: var(--color-muted);
    line-height: 1.6;
}

/* ===== Certifications Section ===== */
.section-certifications {
    background: var(--color-bg);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

.cert-item {
    text-align: center;
    padding: 32px 16px;
    border-radius: var(--card-radius);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
    text-decoration: none;
    color: inherit;
    cursor: pointer;
    display: block;
}

.cert-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--card-shadow);
    transform: translateY(-2px);
}

.cert-icon {
    width: 48px;
    height: 48px;
    color: var(--color-primary);
    margin: 0 auto 16px;
}

.cert-icon svg {
    width: 100%;
    height: 100%;
}

.cert-item h4 {
    font-size: 15px;
    margin-bottom: 4px;
}

.cert-item p {
    font-size: 12px;
    color: var(--color-muted);
}

/* ===== Cases Section ===== */
.section-cases {
    background: var(--color-surface);
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--grid-gap);
}

.case-card {
    background: #ffffff;
    border-radius: var(--card-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: all var(--transition);
}

.case-card:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--card-shadow-hover);
}

.case-card-img {
    aspect-ratio: 3 / 2;
    overflow: hidden;
}

.case-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.case-card:hover .case-card-img img {
    transform: scale(1.05);
}

.case-card-body {
    padding: 24px;
}

.case-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
    background: rgba(7, 63, 148, 0.08);
    padding: 4px 10px;
    border-radius: 4px;
    margin-bottom: 12px;
}

.case-card-body h4 {
    font-size: 17px;
    margin-bottom: 8px;
}

.case-card-body p {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.6;
}

/* ===== News Section ===== */
.section-news {
    background: var(--color-bg);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--grid-gap);
}

.news-card {
    background: #ffffff;
    border-radius: var(--card-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: all var(--transition);
}

.news-card:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--card-shadow-hover);
}

.news-card-img {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    position: relative;
}

.news-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.news-card:hover .news-card-img img {
    transform: scale(1.05);
}

.news-date {
    position: absolute;
    bottom: 12px;
    left: 12px;
    background: var(--color-primary);
    color: #ffffff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 4px;
}

.news-card-body {
    padding: 24px;
}

.news-category {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.news-card-body h4 {
    font-size: 17px;
    margin: 8px 0;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card-body p {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 12px;
}

.news-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-primary);
    transition: all var(--transition);
}

.news-link:hover {
    color: var(--color-primary-hover);
    padding-left: 4px;
}

/* ===== Inquiry Section ===== */
.section-inquiry {
    background: var(--color-dark);
}

.inquiry-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.inquiry-info .section-tag,
.inquiry-info .section-title,
.inquiry-info .section-desc {
    text-align: left;
}

.inquiry-info .section-desc {
    margin-bottom: 32px;
}

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

.inquiry-contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.inquiry-contact-item svg {
    width: 24px;
    height: 24px;
    color: var(--color-accent);
    flex-shrink: 0;
}

.inquiry-contact-item div {
    display: flex;
    flex-direction: column;
}

.inquiry-contact-item span {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.inquiry-contact-item strong {
    font-size: 16px;
    color: #ffffff;
    font-weight: 500;
}

/* Form */
.inquiry-form {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 36px;
}

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

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--btn-radius);
    color: #ffffff;
    font-size: 15px;
    transition: all var(--transition);
    outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.35);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
    background: rgba(255, 255, 255, 0.12);
    box-shadow: 0 0 0 3px rgba(7, 63, 148, 0.3);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group input.error,
.form-group textarea.error {
    border-color: var(--color-error);
}

.form-error {
    font-size: 12px;
    color: var(--color-error);
    margin-top: 4px;
    display: none;
}

.form-group input.error + .form-error,
.form-group textarea.error + .form-error {
    display: block;
}

.inquiry-form .btn-primary {
    background: var(--color-accent);
    margin-top: 8px;
}

.inquiry-form .btn-primary:hover {
    background: #d0650a;
    box-shadow: 0 4px 12px rgba(232, 114, 12, 0.3);
}

.form-privacy {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.4);
    text-align: center;
    margin-top: 16px;
}

.form-success {
    display: none;
    text-align: center;
    padding: 40px 20px;
}

.form-success.show {
    display: block;
}

.form-success svg {
    width: 64px;
    height: 64px;
    color: var(--color-success);
    margin-bottom: 16px;
}

.form-success h3 {
    color: #ffffff;
    font-size: 20px;
    margin-bottom: 8px;
}

.form-success p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

/* ===== Footer ===== */
.footer {
    background: var(--color-dark);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-logo {
    height: auto;
    width: 150px;
    margin-bottom: 16px;
    filter: brightness(0) invert(1);
}

.footer-about p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.7;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.6);
    transition: all var(--transition);
}

.social-link:hover {
    background: var(--color-primary);
    color: #ffffff;
}

.social-link svg {
    width: 18px;
    height: 18px;
}

.footer-col h4 {
    font-size: 16px;
    color: #ffffff;
    margin-bottom: 20px;
    font-weight: 600;
}

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

.footer-col ul li a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
    transition: all var(--transition);
}

.footer-col ul li a:hover {
    color: #ffffff;
    padding-left: 4px;
}

.footer-contact-list li {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    align-items: flex-start;
}

.footer-contact-list li svg {
    width: 18px;
    height: 18px;
    color: var(--color-accent);
    flex-shrink: 0;
    margin-top: 3px;
}

.footer-contact-list li span {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.6;
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.35);
}

/* ===== Page Hero (Inner Pages) ===== */
.page-hero {
    position: relative;
    background: var(--color-surface);
    padding: 140px 0 80px;
    margin-top: 76px;
    text-align: center;
    overflow: hidden;
}

.page-hero .hero-bg-img {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.page-hero .hero-bg-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.page-hero .hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(7, 63, 148, 0.88) 0%, rgba(10, 22, 40, 0.82) 100%);
    z-index: 1;
}

.page-hero > .container {
    position: relative;
    z-index: 2;
}

.page-hero h1 {
    font-size: 36px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 16px;
}

.page-hero .breadcrumb {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.page-hero .breadcrumb a {
    color: rgba(255, 255, 255, 0.8);
}

.page-hero .breadcrumb a:hover {
    color: #ffffff;
    text-decoration: underline;
}

/* ===== About Layout ===== */
.about-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-layout.reverse {
    direction: rtl;
}

.about-layout.reverse > * {
    direction: ltr;
}

.about-image {
    border-radius: var(--card-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
}

.about-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.about-content h2 {
    font-size: 28px;
    margin-bottom: 20px;
}

.about-content p {
    font-size: 15px;
    color: var(--color-muted);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-content .btn {
    margin-top: 12px;
}

.factory-stats {
    display: flex;
    gap: 40px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

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

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.stat-label {
    font-size: 14px;
    color: var(--color-muted);
    margin-top: 8px;
    display: block;
}

/* ===== Category Tabs ===== */
.section-category-nav {
    padding: 0;
    margin-top: -20px;
}

.category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    padding: 24px 0;
}

.category-tab {
    padding: 10px 24px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text);
    background: var(--color-surface);
    border-radius: 30px;
    transition: all var(--transition);
    border: 1px solid transparent;
}

.category-tab:hover,
.category-tab.active {
    background: var(--color-primary);
    color: #ffffff;
}

/* ===== Product Detail Grid ===== */
.category-header {
    margin-bottom: 40px;
}

.category-header h2 {
    font-size: 28px;
    margin-bottom: 12px;
}

.category-header p {
    font-size: 16px;
    color: var(--color-muted);
}

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

.product-detail-card {
    background: #ffffff;
    border-radius: var(--card-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: all var(--transition);
}

.product-detail-card:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--card-shadow-hover);
}

.product-detail-img {
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: #ffffff;
}

.product-detail-img img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform 0.5s ease;
}

.product-detail-card:hover .product-detail-img img {
    transform: scale(1.05);
}

.product-detail-body {
    padding: 24px;
}

.product-detail-body h4 {
    font-size: 18px;
    margin-bottom: 8px;
}

.product-detail-body p {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.6;
    margin-bottom: 16px;
}

.btn-sm {
    padding: 8px 20px;
    font-size: 14px;
}

.alt-bg {
    background: var(--color-surface);
}

/* ===== Product Detail Page ===== */
.product-detail-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.product-detail-gallery .product-main-img {
    border-radius: var(--card-radius);
    overflow: hidden;
    margin-bottom: 16px;
    box-shadow: var(--card-shadow);
    background: #ffffff;
}

.product-detail-gallery .product-main-img img {
    width: 100%;
    height: 450px;
    object-fit: contain;
}

.product-thumb-list {
    display: flex;
    gap: 12px;
}

.product-thumb {
    width: 80px;
    height: 80px;
    border-radius: 6px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition);
}

.product-thumb.active,
.product-thumb:hover {
    border-color: var(--color-primary);
}

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

.product-detail-info .product-category {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
    background: rgba(7, 63, 148, 0.08);
    padding: 4px 12px;
    border-radius: 4px;
    margin-bottom: 16px;
}

.product-detail-info h2 {
    font-size: 28px;
    margin-bottom: 16px;
}

.product-detail-info .product-desc {
    font-size: 15px;
    color: var(--color-muted);
    line-height: 1.8;
    margin-bottom: 32px;
}

.product-specs h4 {
    font-size: 18px;
    margin-bottom: 16px;
}

.specs-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 32px;
}

.specs-table tr {
    border-bottom: 1px solid var(--color-border);
}

.specs-table td {
    padding: 12px 0;
    font-size: 14px;
}

.specs-table td:first-child {
    font-weight: 600;
    color: var(--color-text);
    width: 120px;
}

.specs-table td:last-child {
    color: var(--color-muted);
}

.product-actions {
    display: flex;
    gap: 16px;
}

/* ===== Application Scenarios ===== */
.app-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--grid-gap);
}

.app-item {
    background: #ffffff;
    border-radius: var(--card-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: all var(--transition);
}

.app-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
}

.app-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.app-item h4 {
    padding: 20px 20px 8px;
    font-size: 18px;
}

.app-item p {
    padding: 0 20px 20px;
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.6;
}

/* ===== CTA Dark Section ===== */
.section-cta-dark {
    background: var(--color-dark);
    padding: 80px 0;
}

.cta-dark-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-dark-content h2 {
    font-size: 32px;
    color: #ffffff;
    margin-bottom: 16px;
}

.cta-dark-content p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 32px;
}

/* ===== OEM Page ===== */
.oem-tabs {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 48px;
}

.oem-tab {
    padding: 12px 36px;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    background: var(--color-surface);
    border: 2px solid transparent;
    border-radius: 30px;
    cursor: pointer;
    transition: all var(--transition);
}

.oem-tab:hover,
.oem-tab.active {
    background: var(--color-primary);
    color: #ffffff;
}

.process-step p {
    font-size: 12px;
    color: var(--color-muted);
    line-height: 1.5;
}

.custom-en {
    font-size: 11px;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.custom-item p:last-child {
    font-size: 13px;
    color: var(--color-muted);
}
.oem-process {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.process-step {
    text-align: center;
    flex: 1;
    min-width: 120px;
    padding: 24px 16px;
    background: var(--color-surface);
    border-radius: var(--card-radius);
    position: relative;
}

.process-step .step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #ffffff;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 12px;
}

.process-step h4 {
    font-size: 15px;
    margin-bottom: 4px;
}

.process-step p {
    font-size: 13px;
    color: var(--color-muted);
}

.process-arrow {
    font-size: 24px;
    color: var(--color-primary);
    flex-shrink: 0;
}

.customization-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.custom-item {
    text-align: center;
    padding: 32px 16px;
    background: #ffffff;
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
    transition: all var(--transition);
    text-decoration: none;
    color: inherit;
    cursor: pointer;
    display: block;
}

.custom-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
}

.custom-item .custom-icon {
    width: 48px;
    height: 48px;
    color: var(--color-primary);
    margin: 0 auto 16px;
}

.custom-item .custom-icon svg {
    width: 100%;
    height: 100%;
}

.custom-item h4 {
    font-size: 15px;
    margin-bottom: 4px;
}

.custom-item p {
    font-size: 13px;
    color: var(--color-muted);
}

.oem-feature-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.oem-feature-layout.reverse {
    direction: rtl;
}

.oem-feature-layout.reverse > * {
    direction: ltr;
}

.oem-feature-image {
    border-radius: var(--card-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
}

.oem-feature-image img {
    width: 100%;
    height: 350px;
    object-fit: cover;
}

.oem-feature-content h2 {
    font-size: 28px;
    margin-bottom: 20px;
}

.oem-feature-content p {
    font-size: 15px;
    color: var(--color-muted);
    line-height: 1.8;
    margin-bottom: 16px;
}

/* ===== News Page ===== */
.news-tabs {
    display: flex;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.news-tab {
    padding: 10px 24px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text);
    background: var(--color-surface);
    border-radius: 30px;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
}

.news-tab:hover,
.news-tab.active {
    background: var(--color-primary);
    color: #ffffff;
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.news-list-item {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 24px;
    background: #ffffff;
    border-radius: var(--card-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: all var(--transition);
}

.news-list-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-shadow-hover);
}

.news-list-item .news-list-img {
    aspect-ratio: 16 / 10;
    overflow: hidden;
}

.news-list-item .news-list-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.news-list-item:hover .news-list-img img {
    transform: scale(1.05);
}

.news-list-body {
    padding: 24px 24px 24px 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.news-list-body .news-date {
    font-size: 13px;
    color: var(--color-muted);
    margin-bottom: 8px;
}

.news-list-body h4 {
    font-size: 18px;
    margin-bottom: 8px;
    line-height: 1.4;
}

.news-list-body p {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.6;
    margin-bottom: 12px;
}

.news-list-body .news-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-primary);
}

/* ===== News Detail ===== */
.article-content {
    max-width: 800px;
    margin: 0 auto;
}

.article-meta {
    display: flex;
    gap: 24px;
    margin-bottom: 32px;
    font-size: 14px;
    color: var(--color-muted);
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.article-cover {
    border-radius: var(--card-radius);
    overflow: hidden;
    margin-bottom: 40px;
    box-shadow: var(--card-shadow);
}

.article-cover img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.rich-text {
    font-size: 16px;
    line-height: 1.9;
    color: var(--color-text);
}

.rich-text p {
    margin-bottom: 20px;
}

.rich-text h3 {
    font-size: 22px;
    margin: 32px 0 16px;
}

.rich-text img {
    border-radius: var(--card-radius);
    margin: 24px 0;
    width: 100%;
}

/* ===== Contact Page ===== */
.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

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

.contact-info-item .contact-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(7, 63, 148, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-info-item .contact-icon svg {
    width: 22px;
    height: 22px;
    color: var(--color-primary);
}

.contact-info-item .contact-text h4 {
    font-size: 16px;
    margin-bottom: 4px;
}

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

.contact-map {
    margin-top: 32px;
    border-radius: var(--card-radius);
    overflow: hidden;
    height: 250px;
    background: var(--color-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-muted);
    font-size: 14px;
}

.contact-form-wrapper {
    background: var(--color-surface);
    border-radius: 12px;
    padding: 40px;
}

.contact-form-wrapper h3 {
    font-size: 22px;
    margin-bottom: 24px;
}

.contact-form-wrapper .form-group label {
    color: var(--color-text);
}

.contact-form-wrapper .form-group input,
.contact-form-wrapper .form-group textarea {
    background: #ffffff;
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.contact-form-wrapper .form-group input::placeholder,
.contact-form-wrapper .form-group textarea::placeholder {
    color: #999;
}

.contact-form-wrapper .form-group input:focus,
.contact-form-wrapper .form-group textarea:focus {
    border-color: var(--color-primary);
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(7, 63, 148, 0.1);
}

.contact-form-wrapper .btn-primary {
    background: var(--color-primary);
}

.contact-form-wrapper .btn-primary:hover {
    background: var(--color-primary-hover);
    box-shadow: 0 4px 12px rgba(7, 63, 148, 0.3);
}

.contact-form-wrapper .form-privacy {
    color: var(--color-muted);
}

/* ===== Pagination ===== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}

.pagination-btn {
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: var(--btn-radius);
    cursor: pointer;
    transition: all var(--transition);
}

.pagination-btn:hover:not(.disabled):not(.active) {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.pagination-btn.active {
    background: var(--color-primary);
    color: #ffffff;
    border-color: var(--color-primary);
}

.pagination-btn.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ===== Category Nav ===== */
.section-category-nav {
    padding: 0;
    margin-top: -20px;
}

.category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    padding: 24px 0;
}

.category-tab {
    padding: 10px 24px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text);
    background: var(--color-surface);
    border-radius: 30px;
    transition: all var(--transition);
    border: 1px solid transparent;
    text-decoration: none;
}

.category-tab:hover,
.category-tab.active {
    background: var(--color-primary);
    color: #ffffff;
}

/* ===== Product List ===== */
.product-list-header {
    text-align: center;
    margin-bottom: 40px;
}

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

/* ===== Manufacturing Page ===== */
.manufacturing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--grid-gap);
}

.manufacturing-card {
    background: #ffffff;
    border-radius: var(--card-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: all var(--transition);
}

.manufacturing-card:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--card-shadow-hover);
}

.manufacturing-card-img {
    aspect-ratio: 4 / 3;
    overflow: hidden;
}

.manufacturing-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.manufacturing-card:hover .manufacturing-card-img img {
    transform: scale(1.05);
}

.manufacturing-card-body {
    padding: 24px;
}

.manufacturing-card-body h3 {
    font-size: 18px;
    margin-bottom: 4px;
}

.manufacturing-card-en {
    font-size: 13px;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: 12px;
}

.manufacturing-card-body p:last-child {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.6;
}

/* ===== Scroll Animations ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.stagger-item {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-item.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
    .cert-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

    .product-list-grid,
    .product-detail-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    :root {
        --section-spacing: 48px;
        --section-padding: 40px 0;
    }

    .nav {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        z-index: 1002;
        padding-top: 80px;
        overflow-y: auto;
    }

    .nav.open {
        display: block;
    }

    .nav-close {
        display: none;
        position: absolute;
        top: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
        font-size: 28px;
        line-height: 1;
        color: var(--color-text);
        background: none;
        border: none;
        cursor: pointer;
        z-index: 1;
    }

    .nav.open .nav-close {
        display: block;
    }

    .nav.open .nav-list {
        flex-direction: column;
        gap: 0;
    }

    .nav.open .nav-link {
        padding: 16px 0;
        font-size: 18px;
        border-bottom: 1px solid var(--color-border);
    }

    .nav.open .nav-link.active::after {
        display: none;
    }

    .nav.open .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        padding: 0 0 0 20px;
        display: none;
    }

    .nav.open .nav-dropdown.open .dropdown-menu {
        display: block;
    }

    .nav.open .nav-dropdown.open .nav-link {
        color: var(--color-primary);
    }

    .nav.open .nav-dropdown.open .nav-arrow {
        transform: rotate(180deg);
    }

    .nav.open .dropdown-menu li a {
        padding: 12px 20px;
        font-size: 16px;
        border-bottom: 1px solid var(--color-border);
    }

    .nav.open .dropdown-menu li:last-child a {
        border-bottom: none;
    }

    .header-nav {
        display: none;
    }

    .header-inner {
        height: auto;
        min-height: 64px;
        padding: 10px 0;
        gap: 8px;
    }

    .logo img {
        width: 110px;
    }

    .container {
        padding: 0 12px;
    }

    .hamburger {
        display: flex;
        position: relative;
        top: 0;
        right: 0;
        z-index: auto;
    }

    .header-actions {
        gap: 8px;
    }

    .page-hero {
        margin-top: 64px;
    }

    .header-cta {
        display: none;
    }

    .hero {
        height: 100dvh;
        min-height: 500px;
    }

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

    .product-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .product-list-grid,
    .product-detail-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

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

    .inquiry-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

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

@media (max-width: 768px) {
    .hero {
        height: 100dvh;
        min-height: 450px;
        margin-top: 64px;
    }

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

    .hero-desc {
        font-size: 15px;
    }

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

    .carousel-btn {
        width: 36px;
        height: 36px;
    }

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

    .case-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }

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

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

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

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

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

    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .btn {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 576px) {
    .advantages-card-grid {
        grid-template-columns: 1fr;
    }

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

    .hero {
        height: 100dvh;
        min-height: 400px;
    }

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

    .inquiry-form {
        padding: 24px;
    }

    .about-layout,
    .about-layout.reverse,
    .oem-feature-layout,
    .oem-feature-layout.reverse,
    .product-detail-layout,
    .contact-layout {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .about-layout.reverse,
    .oem-feature-layout.reverse {
        direction: ltr;
    }

    .product-detail-grid,
    .app-grid {
        grid-template-columns: 1fr;
    }

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

    .news-list-item {
        grid-template-columns: 1fr;
    }

    .news-list-body {
        padding: 0 20px 20px;
    }

    .oem-process {
        flex-direction: column;
    }

    .process-arrow {
        transform: rotate(90deg);
    }

    .factory-stats {
        flex-wrap: wrap;
        gap: 24px;
    }

    .page-hero {
        margin-top: 64px;
        padding: 90px 0 40px;
    }

    .page-hero h1 {
        font-size: 28px;
    }

    .contact-form-wrapper {
        padding: 24px;
    }

    .product-actions {
        flex-direction: column;
    }

    .product-actions .btn {
        width: 100%;
        text-align: center;
    }

    .advantages-bg-img {
        width: 100%;
        opacity: 0.08;
    }

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

    .stat-number {
        font-size: 36px;
    }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .fade-in {
        opacity: 1;
        transform: none;
    }

    .stagger-item {
        opacity: 1;
        transform: none;
    }
}

/* ===== Scroll Reveal Animations ===== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.in-view {
    opacity: 1;
    transform: translateY(0);
}

.reveal-zoom {
    opacity: 0;
    transform: scale(0.85);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-zoom.in-view {
    opacity: 1;
    transform: scale(1);
}

.reveal-fade {
    opacity: 0;
    transition: opacity 0.8s ease;
}

.reveal-fade.in-view {
    opacity: 1;
}

.reveal-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-left.in-view {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-right.in-view {
    opacity: 1;
    transform: translateX(0);
}

/* ===== Mobile/Desktop Hero Toggle ===== */
.mobile-only-hero {
    display: none;
}

@media (max-width: 992px) {
    .mobile-only-hero {
        display: block;
    }
    
    .desktop-only-hero {
        display: none;
    }
}