/* ============================================
   DeYing - Precision Aluminum Extrusion
   style.css - Complete Design System
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
    --primary: #F78C30;
    --primary-hover: #E07A20;
    --primary-light: #FFF4EB;
    --accent: #8C2329;
    --bg-light: #F5F6F8;
    --bg-dark: #2B2D2F;
    --bg-dark-light: #3A3D40;
    --text-primary: #1A1C1E;
    --text-secondary: #5A5D62;
    --text-muted: #8A8D92;
    --border-light: #E2E4E8;
    --white: #FFFFFF;

    --font-main: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

    --max-width: 1500px;
    --header-height: 80px;

    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.04);
    --shadow-card-hover: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-header: 0 2px 20px rgba(0, 0, 0, 0.06);

    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.35s ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-main);
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-light);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* ---------- Container ---------- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.25;
    color: var(--text-primary);
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 12px;
    position: relative;
    padding-left: 32px;
}

.section-tag::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 2px;
    background: var(--primary);
}

.section-title {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-desc {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.7;
}

.section-header {
    text-align: center;
    margin-bottom: 72px;
}

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

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

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-main);
    font-size: 15px;
    font-weight: 600;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    gap: 8px;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(247, 140, 48, 0.35);
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}

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

.btn-ghost {
    background: transparent;
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.4);
}

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

.btn-lg {
    padding: 16px 40px;
    font-size: 16px;
}

/* ============================================
   HEADER / NAVBAR
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.97);
    transition: box-shadow var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-header);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 14px;
}

.header-logo img {
    height: 42px;
    width: auto;
}

.header-logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
    padding-left: 14px;
    border-left: 1px solid var(--border-light);
}

.header-logo-text .logo-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.3px;
}

.header-logo-text .logo-sub {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-top: 2px;
}

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

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

.nav-link {
    display: block;
    padding: 8px 18px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 18px;
    right: 18px;
    height: 2px;
    background: var(--primary);
    transform: scaleX(0);
    transition: transform var(--transition-fast);
}

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

.nav-link:hover::after {
    transform: scaleX(1);
}

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

.nav-link.active::after {
    transform: scaleX(1);
}

.header-cta {
    margin-left: 16px;
    padding: 10px 24px;
    font-size: 14px;
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.hamburger-line {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

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

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

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

/* ============================================
   HERO
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-dark);
}

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

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

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(30, 32, 34, 0.92) 0%, rgba(43, 45, 47, 0.75) 40%, rgba(43, 45, 47, 0.35) 100%);
}

/* Technical wireframe overlay */
.hero-wireframe {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 55%;
    z-index: 1;
    pointer-events: none;
    opacity: 0.5;
    will-change: opacity;
}

.wireframe-svg {
    width: 100%;
    height: 100%;
}

/* Carousel dots */
.hero-dots {
    position: absolute;
    left: 24px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.hero-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.25);
    cursor: pointer;
    transition: all var(--transition-base);
}

.hero-dot.active {
    background: var(--primary);
    box-shadow: 0 0 8px rgba(247, 140, 48, 0.5);
    transform: scale(1.3);
}

.hero-dot:hover {
    background: rgba(247, 140, 48, 0.6);
}

/* Hero content */
.hero-content {
    position: relative;
    z-index: 2;
    flex: 1;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    padding-bottom: 0;
    min-height: calc(100vh - 120px);
}

.hero-text {
    max-width: 680px;
}

.hero-title {
    font-size: 48px;
    font-weight: 800;
    color: var(--white);
    line-height: 1.12;
    letter-spacing: -0.8px;
    margin-bottom: 20px;
}

/* Featured product tags */
.hero-products {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 36px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
}

.hero-product-tag {
    color: rgba(255, 255, 255, 0.85);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.hero-product-tag:hover {
    color: var(--primary);
}

.hero-product-sep {
    color: var(--primary);
    font-weight: 300;
    opacity: 0.6;
}

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

.hero-cta-btn {
    padding: 16px 36px;
    font-size: 16px;
    box-shadow: 0 4px 20px rgba(247, 140, 48, 0.3);
}

.hero-cta-btn:hover {
    box-shadow: 0 8px 30px rgba(247, 140, 48, 0.45);
}

/* 3 Core Advantages Bar */
.hero-advantages {
    position: relative;
    z-index: 2;
    background: rgba(30, 32, 34, 0.6);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 0;
}

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

.advantage-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 28px 32px;
    border-right: 1px solid rgba(255, 255, 255, 0.06);
    transition: background var(--transition-base);
}

.advantage-item:last-child {
    border-right: none;
}

.advantage-item:hover {
    background: rgba(247, 140, 48, 0.04);
}

.advantage-icon {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(247, 140, 48, 0.25);
    border-radius: var(--radius-sm);
    color: var(--primary);
}

.advantage-icon svg {
    width: 22px;
    height: 22px;
}

.advantage-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.advantage-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--white);
    letter-spacing: 0.3px;
}

.advantage-desc {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.45);
    font-weight: 400;
}

/* Scroll indicator */
.hero-scroll-indicator {
    position: absolute;
    bottom: 24px;
    right: 40px;
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.scroll-line {
    display: block;
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.5), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* ============================================
   PRODUCT DISPLAY
   ============================================ */
.product-display {
    padding: 80px 0;
    background: var(--white);
}

.product-display-header {
    text-align: center;
    margin-bottom: 40px;
}

.product-display-title {
    font-size: 36px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.product-display-desc {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* Horizontal Tab Bar */
.product-tabs-bar {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.product-tab {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 24px;
    font-family: var(--font-main);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.product-tab:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: var(--primary-light);
}

.product-tab.active {
    color: var(--white);
    background: var(--primary);
    border-color: var(--primary);
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(247, 140, 48, 0.25);
}

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

/* Product Showcase (2-column layout) */
.product-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    margin-bottom: 56px;
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.showcase-visual {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
}

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

.showcase-badge {
    position: absolute;
    bottom: 20px;
    left: 20px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    padding: 12px 18px;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.badge-label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 2px;
}

.badge-value {
    display: block;
    font-size: 18px;
    font-weight: 800;
    color: var(--primary);
}

.showcase-info {
    padding: 40px 40px 40px 0;
}

.showcase-title {
    font-size: 28px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.3px;
}

.showcase-subtitle {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

/* Feature List */
.feature-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 32px;
}

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

.feature-icon {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: var(--radius-sm);
    color: var(--primary);
}

.feature-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.feature-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.feature-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.showcase-actions {
    display: flex;
    gap: 12px;
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

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

/* Product Grid (5 items in one row) */
.product-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
}

.product-grid-item {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: all var(--transition-base);
    display: block;
}

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

.grid-item-img {
    width: 100%;
    aspect-ratio: 1;
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.grid-item-img img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.grid-item-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    border-top: 1px solid var(--border-light);
}

.grid-item-label svg {
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

.product-grid-item:hover .grid-item-label svg {
    color: var(--primary);
    transform: translateX(4px);
}

/* ============================================
   STATS BAR
   ============================================ */
.stats-bar {
    background: var(--white);
    padding: 48px 0;
    border-bottom: 1px solid var(--border-light);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    text-align: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-number {
    font-size: 42px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    font-variant-numeric: tabular-nums;
}

.stat-suffix {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary);
    margin-left: 2px;
}

.stat-icon {
    font-size: 36px;
    line-height: 1;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
    margin-top: 4px;
}

/* ============================================
   ABOUT US
   ============================================ */
.about-us {
    padding: 80px 0;
    background: var(--white);
}

.about-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
}

.about-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.about-image img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

.about-stats-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    background: rgba(43, 45, 47, 0.85);
    backdrop-filter: blur(8px);
    padding: 20px 24px;
    gap: 0;
}

.about-stat {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    border-right: 1px solid rgba(255, 255, 255, 0.15);
    padding: 0 16px;
}

.about-stat:last-child {
    border-right: none;
}

.about-stat-num {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.about-stat-label {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
    font-weight: 500;
}

.about-content .section-title {
    font-size: 30px;
    margin-bottom: 20px;
}

.about-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-actions {
    display: flex;
    gap: 12px;
    margin-top: 28px;
}

/* ============================================
   WHY CHOOSE US (Advantages)
   ============================================ */
.why-choose-us {
    padding: 80px 0;
    background: var(--bg-light);
}

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

.advantage-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: all var(--transition-base);
}

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

.advantage-card-img {
    width: 100%;
    aspect-ratio: 4/3;
    overflow: hidden;
    background: var(--bg-light);
}

.advantage-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.advantage-card-body {
    padding: 24px 20px 28px;
    text-align: center;
}

.advantage-card-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.advantage-card-divider {
    width: 32px;
    height: 2px;
    background: var(--primary);
    margin: 0 auto 14px;
    border-radius: 1px;
}

.advantage-card-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============================================
   CAPABILITIES HIGHLIGHT
   ============================================ */
.capabilities-highlight {
    padding: 96px 0;
    background: var(--bg-light);
}

.cap-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.cap-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.cap-image img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

.cap-image-badge {
    position: absolute;
    bottom: 24px;
    left: 24px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    padding: 16px 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card-hover);
}

.badge-number {
    display: block;
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.badge-text {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

.cap-content .section-title {
    margin-bottom: 16px;
}

.cap-desc {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.process-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px 32px;
    margin-bottom: 36px;
}

.process-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
}

.process-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    flex-shrink: 0;
}

/* ============================================
   CASES PREVIEW
   ============================================ */
.cases-preview {
    padding: 96px 0;
    background: var(--white);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.case-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--white);
    border: 1px solid var(--border-light);
    transition: all var(--transition-slow);
}

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

.case-img {
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
}

.case-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.case-content {
    padding: 24px;
}

.case-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-light);
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.case-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.3;
}

.case-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 18px;
}

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

.case-link:hover {
    gap: 10px;
    color: var(--primary-hover);
}

/* ============================================
   CTA BANNER
   ============================================ */
.cta-banner {
    padding: 96px 0;
    background: var(--bg-dark);
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(247, 140, 48, 0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-title {
    font-size: 40px;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.cta-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.7);
    max-width: 560px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--bg-dark);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 64px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-logo img {
    height: 36px;
    width: auto;
    margin-bottom: 20px;
}

.footer-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.7;
    max-width: 320px;
}

.footer-heading {
    font-size: 15px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-links li {
    margin-bottom: 12px;
}

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

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

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-contact svg {
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--primary);
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
}

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

/* ============================================
   ORDER PROCESS
   ============================================ */
.order-process {
    padding: 140px 0;
    background: var(--bg-light);
    position: relative;
    overflow: hidden;
}

.order-process::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 1000px;
    height: 1000px;
    background: radial-gradient(circle, rgba(247, 140, 48, 0.04) 0%, transparent 60%);
    border-radius: 50%;
    pointer-events: none;
}

.order-process .section-header {
    margin-bottom: 80px;
}

.process-flow {
    position: relative;
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 60px;
}

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

.process-row-top {
    margin-bottom: 32px;
}

.process-row-bottom {
    margin-top: 32px;
}

.process-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 28px;
    flex: 1;
    min-width: 0;
    position: relative;
}

.step-circle {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    background: var(--white);
    border: 3px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    transition: all var(--transition-base);
    flex-shrink: 0;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
    position: relative;
}

.step-circle::after {
    content: '';
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    border: 2px solid transparent;
    transition: all var(--transition-base);
}

.process-step:hover .step-circle {
    border-color: var(--primary);
    background: var(--white);
    box-shadow: 0 12px 40px rgba(247, 140, 48, 0.3);
    transform: scale(1.08);
}

.process-step:hover .step-circle::after {
    border-color: rgba(247, 140, 48, 0.2);
}

.step-number {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 28px;
    height: 28px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(247, 140, 48, 0.4);
}

.step-circle svg {
    width: 40px;
    height: 40px;
}

.step-label {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    line-height: 1.5;
    letter-spacing: 0.5px;
    max-width: 140px;
}

.process-arrow {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    opacity: 0.3;
}

.process-arrow svg {
    width: 100%;
    max-width: 80px;
    height: auto;
}

/* Side loop arrows */
.process-side-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 70px;
    height: 200px;
    color: var(--primary);
    opacity: 0.2;
    z-index: 1;
}

.process-side-right {
    right: 0;
}

.process-side-left {
    left: 0;
}

.process-side-arrow svg {
    width: 100%;
    height: 100%;
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

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

/* Staggered delay for grid children */
.advantages-cards-grid .fade-in:nth-child(1) { transition-delay: 0s; }
.advantages-cards-grid .fade-in:nth-child(2) { transition-delay: 0.1s; }
.advantages-cards-grid .fade-in:nth-child(3) { transition-delay: 0.15s; }
.advantages-cards-grid .fade-in:nth-child(4) { transition-delay: 0.2s; }

.cases-grid .fade-in:nth-child(1) { transition-delay: 0s; }
.cases-grid .fade-in:nth-child(2) { transition-delay: 0.1s; }
.cases-grid .fade-in:nth-child(3) { transition-delay: 0.2s; }

.stats-grid .fade-in:nth-child(1) { transition-delay: 0s; }
.stats-grid .fade-in:nth-child(2) { transition-delay: 0.08s; }
.stats-grid .fade-in:nth-child(3) { transition-delay: 0.16s; }
.stats-grid .fade-in:nth-child(4) { transition-delay: 0.24s; }

.advantages-grid .fade-in:nth-child(1) { transition-delay: 0.1s; }
.advantages-grid .fade-in:nth-child(2) { transition-delay: 0.2s; }
.advantages-grid .fade-in:nth-child(3) { transition-delay: 0.3s; }

.hero-text .fade-in:nth-child(1) { transition-delay: 0.2s; }
.hero-text .fade-in:nth-child(2) { transition-delay: 0.4s; }
.hero-text .fade-in:nth-child(3) { transition-delay: 0.55s; }

.order-process .fade-in:nth-child(1) { transition-delay: 0s; }
.process-step:nth-child(1) { transition-delay: 0.05s; }
.process-step:nth-child(3) { transition-delay: 0.1s; }
.process-step:nth-child(5) { transition-delay: 0.15s; }
.process-step:nth-child(7) { transition-delay: 0.2s; }

/* ============================================
   RESPONSIVE - LAPTOP
   ============================================ */
@media (max-width: 1449px) {
    .container {
        padding: 0 20px;
    }

    .hero-title {
        font-size: 42px;
    }

    .section-title {
        font-size: 32px;
    }

    .hero-wireframe {
        width: 50%;
        opacity: 0.5;
    }
}

/* ============================================
   PAGE HERO (Inner Pages)
   ============================================ */
.page-hero {
    position: relative;
    height: 320px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--bg-dark);
    margin-top: var(--header-height);
}

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

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

.page-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(30, 32, 34, 0.85) 0%, rgba(43, 45, 47, 0.65) 100%);
}

.page-hero-content {
    position: relative;
    z-index: 1;
    width: 100%;
}

.page-hero-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

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

.breadcrumb-sep {
    color: rgba(255, 255, 255, 0.4);
}

.breadcrumb-current {
    color: var(--white);
    font-weight: 500;
}

/* ============================================
   COMPANY OVERVIEW (About Page)
   ============================================ */
.company-overview {
    padding: 80px 0;
    background: var(--white);
}

.overview-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
}

.overview-content .section-title {
    font-size: 30px;
    margin-bottom: 20px;
}

.overview-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

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

.overview-stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.overview-stat-num {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.overview-stat-label {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
}

.overview-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.overview-image img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

/* ============================================
   INDUSTRIAL CHAIN (About Page)
   ============================================ */
.industrial-chain {
    padding: 80px 0;
    background: var(--bg-light);
}

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

.chain-item {
    background: var(--white);
    padding: 32px 24px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-card);
    transition: all var(--transition-base);
}

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

.chain-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: var(--radius-md);
    color: var(--primary);
}

.chain-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}

.chain-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   APPLICATIONS (About Page)
   ============================================ */
.applications {
    padding: 80px 0;
    background: var(--white);
}

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

.application-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: all var(--transition-base);
}

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

.application-img {
    width: 100%;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.application-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.application-content {
    padding: 20px;
}

.application-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
}

.application-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   CATEGORY FILTER (Product Page)
   ============================================ */
.category-filter {
    padding: 32px 0;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-light);
}

.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 12px 24px;
    font-family: var(--font-main);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-tab:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: var(--primary-light);
}

.filter-tab.active {
    color: var(--white);
    background: var(--primary);
    border-color: var(--primary);
    font-weight: 600;
}

/* ============================================
   PRODUCT GRID (Product Page)
   ============================================ */
.product-grid-section {
    padding: 64px 0;
    background: var(--bg-light);
}

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

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

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

.product-card-img {
    width: 100%;
    aspect-ratio: 1;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    overflow: hidden;
}

.product-card-img img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transition: transform var(--transition-slow);
}

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

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

.product-card-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-light);
    padding: 4px 10px;
    border-radius: 12px;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.product-card-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.3;
}

.product-card-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

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

.product-card-link:hover {
    gap: 10px;
    color: var(--primary-hover);
}

/* ============================================
   FACTORY OVERVIEW (Capabilities Page)
   ============================================ */
.factory-overview {
    padding: 80px 0;
    background: var(--white);
}

/* ============================================
   CORE PROCESSES (Capabilities Page)
   ============================================ */
.core-processes {
    padding: 80px 0;
    background: var(--bg-light);
}

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

.process-timeline::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 12.5%;
    right: 12.5%;
    height: 2px;
    background: var(--border-light);
    z-index: 0;
}

.process-step {
    position: relative;
    z-index: 1;
    text-align: center;
}

.process-step-num {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
    border: 2px solid var(--primary);
    border-radius: 50%;
    font-size: 24px;
    font-weight: 800;
    color: var(--primary);
    box-shadow: var(--shadow-card);
}

.process-step-content {
    background: var(--white);
    padding: 24px 20px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
}

.process-step-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}

.process-step-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   SURFACE TREATMENT (Capabilities Page)
   ============================================ */
.surface-treatment {
    padding: 80px 0;
    background: var(--white);
}

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

.treatment-card {
    background: var(--bg-light);
    padding: 32px 24px;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.treatment-card:hover {
    background: var(--white);
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-4px);
}

.treatment-icon {
    width: 56px;
    height: 56px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: var(--radius-md);
    color: var(--primary);
}

.treatment-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}

.treatment-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   EQUIPMENT (Capabilities Page)
   ============================================ */
.equipment-showcase {
    padding: 80px 0;
    background: var(--bg-light);
}

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

.equipment-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: all var(--transition-base);
}

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

.equipment-card img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
}

.equipment-info {
    padding: 20px;
}

.equipment-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 6px;
}

.equipment-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ============================================
   CASE FILTER (Cases Page)
   ============================================ */
.case-filter {
    padding: 32px 0;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-light);
}

/* ============================================
   CASE GRID (Cases Page)
   ============================================ */
.case-grid-section {
    padding: 64px 0;
    background: var(--bg-light);
}

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

.case-card-large {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: all var(--transition-base);
}

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

.case-card-img {
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
}

.case-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.case-card-body {
    padding: 28px;
}

.case-card-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-light);
    padding: 4px 12px;
    border-radius: 12px;
    margin-bottom: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.case-card-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.3;
}

.case-card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 18px;
}

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

.case-card-link:hover {
    gap: 10px;
    color: var(--primary-hover);
}

/* ============================================
   CONTACT INFO (Contact Page)
   ============================================ */
.contact-info-section {
    padding: 64px 0;
    background: var(--white);
}

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

.contact-info-card {
    background: var(--bg-light);
    padding: 32px 24px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: all var(--transition-base);
}

.contact-info-card:hover {
    background: var(--white);
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-4px);
}

.contact-info-icon {
    width: 56px;
    height: 56px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: var(--radius-md);
    color: var(--primary);
}

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

.contact-info-title {
    font-size: 16px;
    font-weight: 700;
}

.contact-info-text {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ============================================
   INQUIRY FORM (Contact Page)
   ============================================ */
.inquiry-form-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.form-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: start;
}

.form-content .section-title {
    font-size: 30px;
    margin-bottom: 16px;
}

.form-desc {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
    padding: 14px 16px;
    font-family: var(--font-main);
    font-size: 14px;
    color: var(--text-primary);
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    outline: none;
}

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

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(247, 140, 48, 0.15);
}

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

.form-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.form-image img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

/* ============================================
   RESPONSIVE - INNER PAGES
   ============================================ */
@media (max-width: 1023px) {
    .page-hero {
        height: 260px;
    }

    .page-hero-title {
        font-size: 34px;
    }

    .overview-layout,
    .form-layout {
        grid-template-columns: 1fr;
        gap: 32px;
    }

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

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

    .process-timeline::before {
        display: none;
    }

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

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

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

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

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

@media (max-width: 767px) {
    .page-hero {
        height: 220px;
    }

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

    .chain-grid,
    .applications-grid,
    .treatment-grid,
    .equipment-grid,
    .process-timeline {
        grid-template-columns: 1fr;
    }

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

    .overview-stats {
        flex-wrap: wrap;
        gap: 20px;
    }

    .filter-tabs {
        gap: 8px;
    }

    .filter-tab {
        padding: 10px 16px;
        font-size: 13px;
    }

    .header-cta {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .header-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background: var(--white);
        box-shadow: -4px 0 24px rgba(0, 0, 0, 0.1);
        padding: 100px 32px 32px;
        transition: right var(--transition-base);
        z-index: 999;
    }

    .header-nav.open {
        right: 0;
    }

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

    .nav-link {
        width: 100%;
        padding: 12px 16px;
        font-size: 16px;
    }

    .hero-wireframe {
        width: 45%;
        opacity: 0.3;
    }

    .hero-dots {
        left: 16px;
    }

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

    .hero-products {
        font-size: 14px;
    }

    .header-logo-text {
        display: none;
    }

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

    .advantage-item {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        padding: 20px 24px;
    }

    .advantage-item:last-child {
        border-bottom: none;
    }

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

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

    .about-actions {
        flex-wrap: wrap;
    }

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

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

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 36px;
    }

    .cta-title {
        font-size: 32px;
    }

    .product-tabs-bar {
        gap: 8px;
    }

    .product-tab {
        padding: 12px 18px;
        font-size: 13px;
    }

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

    .showcase-info {
        padding: 0 0 32px 0;
    }

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

    .process-side-arrow {
        display: none;
    }

    .step-circle {
        width: 80px;
        height: 80px;
    }

    .step-number {
        width: 24px;
        height: 24px;
        font-size: 10px;
    }

    .step-circle svg {
        width: 34px;
        height: 34px;
    }

    .step-label {
        font-size: 14px;
        max-width: 120px;
    }

    .process-arrow svg {
        max-width: 55px;
    }
}

/* ============================================
   RESPONSIVE - MOBILE
   ============================================ */
@media (max-width: 767px) {
    .container {
        padding: 0 16px;
    }

    .hero-wireframe {
        display: none;
    }

    .hero-dots {
        left: 12px;
        gap: 8px;
    }

    .hero-dot {
        width: 6px;
        height: 6px;
    }

    .hero-title {
        font-size: 28px;
        letter-spacing: -0.3px;
    }

    .hero-products {
        font-size: 13px;
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }

    .hero-product-sep {
        display: none;
    }

    .hero-product-tag {
        display: inline-flex;
        align-items: center;
        gap: 4px;
    }

    .hero-product-tag::before {
        content: '';
        width: 4px;
        height: 4px;
        border-radius: 50%;
        background: var(--primary);
        flex-shrink: 0;
    }

    .hero-actions {
        width: 100%;
    }

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

    .hero-scroll-indicator {
        right: 16px;
        bottom: 16px;
    }

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

    .section-header {
        margin-bottom: 40px;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }

    .stat-number {
        font-size: 32px;
    }

    .about-us,
    .why-choose-us,
    .capabilities-highlight,
    .cases-preview,
    .cta-banner {
        padding: 64px 0;
    }

    .about-layout {
        gap: 24px;
    }

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

    .about-stats-overlay {
        padding: 14px 16px;
    }

    .about-stat-num {
        font-size: 20px;
    }

    .about-stat-label {
        font-size: 11px;
    }

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

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

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

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

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

    .cta-desc {
        font-size: 16px;
    }

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

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

    .footer-desc {
        max-width: 100%;
    }

    .product-display {
        padding: 56px 0;
    }

    .product-display-title {
        font-size: 26px;
    }

    .product-display-desc {
        font-size: 14px;
    }

    .product-tabs-bar {
        gap: 8px;
        margin-bottom: 32px;
    }

    .product-tab {
        padding: 10px 16px;
        font-size: 12px;
    }

    .tab-icon {
        display: none;
    }

    .product-showcase {
        grid-template-columns: 1fr;
        gap: 24px;
        margin-bottom: 40px;
    }

    .showcase-info {
        padding: 0 0 24px 0;
    }

    .showcase-title {
        font-size: 22px;
    }

    .showcase-subtitle {
        font-size: 14px;
        margin-bottom: 24px;
    }

    .feature-list {
        gap: 16px;
        margin-bottom: 24px;
    }

    .feature-icon {
        width: 36px;
        height: 36px;
    }

    .feature-label {
        font-size: 12px;
    }

    .feature-desc {
        font-size: 13px;
    }

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

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

    .product-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

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

    .process-flow {
        max-width: 100%;
        padding: 0 20px;
    }

    .process-row-top {
        margin-bottom: 20px;
    }

    .process-row-bottom {
        margin-top: 20px;
    }

    .process-row {
        flex-wrap: wrap;
        gap: 40px;
        justify-content: center;
    }

    .process-arrow {
        display: none;
    }

    .process-side-arrow {
        display: none;
    }

    .step-circle {
        width: 76px;
        height: 76px;
    }

    .step-number {
        width: 22px;
        height: 22px;
        font-size: 9px;
    }

    .step-circle svg {
        width: 32px;
        height: 32px;
    }

    .step-label {
        font-size: 14px;
        max-width: 110px;
    }
}