/* ============================================
   客信新材料 - 企业官网
   Main Stylesheet
   ============================================ */

/* --- CSS Variables & Design System --- */
:root {
    /* Primary Blue */
    --primary: #1a56db;
    --primary-dark: #0f3b8e;
    --primary-light: #3b82f6;
    --primary-lighter: #60a5fa;
    --primary-bg: #eff6ff;
    --primary-gradient: linear-gradient(135deg, #0f3b8e 0%, #1a56db 50%, #3b82f6 100%);
    
    /* Accent Colors */
    --accent-orange: #f59e0b;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --accent-purple: #8b5cf6;
    --accent-cyan: #06b6d4;
    
    /* Neutrals */
    --dark: #0f172a;
    --gray-900: #1e293b;
    --gray-700: #334155;
    --gray-500: #64748b;
    --gray-300: #cbd5e1;
    --gray-100: #f1f5f9;
    --white: #ffffff;
    --bg-warm: #f8fafc;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
    --shadow-blue: 0 8px 25px rgba(26,86,219,0.25);
    
    /* Typography */
    --font-heading: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    
    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1200px;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: var(--font-body);
    color: var(--gray-700);
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

ul {
    list-style: none;
}

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

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--dark);
}

.section-title {
    font-size: 2.25rem;
    text-align: center;
    margin-bottom: 1rem;
    position: relative;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--gray-500);
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3rem;
    line-height: 1.7;
}

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

.section-bg-light {
    background-color: var(--bg-warm);
}

.section-bg-blue {
    background: var(--primary-gradient);
    color: var(--white);
}

.section-bg-blue .section-title,
.section-bg-blue .section-subtitle {
    color: var(--white);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(26,86,219,0.35);
}

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

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

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

.btn-accent:hover {
    background: #d97706;
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(245,158,11,0.35);
}

.btn-lg {
    padding: 18px 40px;
    font-size: 1.1rem;
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(203,213,225,0.3);
    transition: var(--transition);
}

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

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Logo */
.site-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.35rem;
    color: var(--primary);
}

.site-logo .logo-icon {
    width: 42px;
    height: 42px;
    background: var(--primary-gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    font-weight: 700;
}

.site-logo .logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.site-logo .logo-sub {
    font-size: 0.65rem;
    font-weight: 400;
    color: var(--gray-500);
    letter-spacing: 2px;
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.main-nav a {
    padding: 8px 18px;
    color: var(--gray-700);
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: 6px;
    transition: var(--transition);
    position: relative;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary);
    background: var(--primary-bg);
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 60%;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: var(--transition);
}

.main-nav a:hover::after,
.main-nav a.active::after {
    transform: translateX(-50%) scaleX(1);
}

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

.nav-dropdown > a i {
    font-size: 0.65rem;
    margin-left: 4px;
    transition: var(--transition);
}

.nav-dropdown:hover > a i {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    min-width: 160px;
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    border: 1px solid var(--gray-100);
}

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

.dropdown-menu a {
    display: block;
    padding: 10px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    white-space: nowrap;
}

.dropdown-menu a:hover {
    background: var(--primary-bg);
    color: var(--primary);
}

.dropdown-menu a::after {
    display: none;
}

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

.menu-toggle span {
    display: block;
    width: 26px;
    height: 2.5px;
    background: var(--gray-900);
    border-radius: 3px;
    transition: var(--transition);
}

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

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

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

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--primary-gradient);
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(255,255,255,0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(59,130,246,0.2) 0%, transparent 40%),
        radial-gradient(ellipse at 50% 80%, rgba(15,59,142,0.3) 0%, transparent 40%);
}

.hero .container {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    color: var(--white);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 24px;
    border: 1px solid rgba(255,255,255,0.2);
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-title span {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.15rem;
    line-height: 1.8;
    opacity: 0.9;
    margin-bottom: 36px;
    max-width: 540px;
}

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

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-visual-inner {
    width: 100%;
    max-width: 500px;
    aspect-ratio: 1;
    position: relative;
}

/* Floating Elements */
.hero-float {
    position: absolute;
    border-radius: 16px;
    padding: 16px 20px;
    background: rgba(255,255,255,0.12);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.15);
    color: var(--white);
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: float 3s ease-in-out infinite;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}

.hero-float i {
    font-size: 1.3rem;
    opacity: 0.8;
}

.hero-float:nth-child(1) { top: 5%; right: 8%; animation-delay: 0s; }
.hero-float:nth-child(2) { top: 22%; right: 35%; animation-delay: 1s; padding: 18px 22px; font-size: 0.95rem; }
.hero-float:nth-child(3) { top: 38%; right: 5%; animation-delay: 0.5s; }
.hero-float:nth-child(4) { top: 55%; right: 25%; animation-delay: 2s; }
.hero-float:nth-child(5) { top: 8%; left: 5%; animation-delay: 0.8s; padding: 10px 16px; font-size: 0.78rem; }
.hero-float:nth-child(6) { top: 28%; left: 2%; animation-delay: 1.5s; padding: 10px 16px; font-size: 0.78rem; }
.hero-float:nth-child(7) { top: 48%; left: 5%; animation-delay: 0.3s; padding: 10px 16px; font-size: 0.78rem; }
.hero-float:nth-child(8) { top: 68%; left: 3%; animation-delay: 2.5s; padding: 10px 16px; font-size: 0.78rem; }
.hero-float:nth-child(9) { bottom: 18%; right: 45%; animation-delay: 1.8s; padding: 10px 16px; font-size: 0.78rem; }
.hero-float:nth-child(10) { bottom: 5%; right: 10%; animation-delay: 2.8s; padding: 10px 16px; font-size: 0.78rem; }

.hero-float:nth-child(2) .float-number { font-size: 1.8rem; font-weight: 800; background: linear-gradient(135deg, #fbbf24, #f59e0b); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.hero-circle {
    position: absolute;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.1);
    animation: pulse-circle 4s ease-in-out infinite;
}

.hero-circle:nth-child(11) {
    width: 280px;
    height: 280px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.hero-circle:nth-child(12) {
    width: 400px;
    height: 400px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 1s;
    border-width: 1px;
}

.hero-circle:nth-child(13) {
    width: 540px;
    height: 540px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 2s;
    border-color: rgba(255,255,255,0.05);
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse-circle {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
    50% { transform: translate(-50%, -50%) scale(1.05); opacity: 0.5; }
}

/* Hero Wave Divider */
.hero-wave {
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    line-height: 0;
    z-index: 2;
}

/* ============================================
   STATS SECTION
   ============================================ */
.stats-section {
    padding: 80px 0;
    background: var(--white);
    position: relative;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.stat-card {
    text-align: center;
    padding: 40px 20px;
    border-radius: 16px;
    transition: var(--transition);
    position: relative;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.06);
}

.stat-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-icon.blue { background: var(--primary-bg); color: var(--primary); }
.stat-icon.green { background: #ecfdf5; color: var(--accent-green); }
.stat-icon.orange { background: #fffbeb; color: var(--accent-orange); }
.stat-icon.purple { background: #f5f3ff; color: var(--accent-purple); }

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 6px;
}

.stat-number .suffix {
    font-size: 1.5rem;
    color: var(--primary);
}

.stat-label {
    color: var(--gray-500);
    font-size: 0.95rem;
}

/* ============================================
   PRODUCTS OVERVIEW (Home)
   ============================================ */
.products-overview {
    padding: var(--section-padding);
    background: var(--bg-warm);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.product-card-img {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.5rem;
    position: relative;
    overflow: hidden;
}

.product-card-img::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(to top, rgba(0,0,0,0.05), transparent);
}

.product-card-img.blue { background: linear-gradient(135deg, #dbeafe, #eff6ff); }
.product-card-img.green { background: linear-gradient(135deg, #d1fae5, #ecfdf5); }
.product-card-img.orange { background: linear-gradient(135deg, #fef3c7, #fffbeb); }
.product-card-img.red { background: linear-gradient(135deg, #fee2e2, #fef2f2); }
.product-card-img.purple { background: linear-gradient(135deg, #ede9fe, #f5f3ff); }

.product-card-body {
    padding: 28px 24px 32px;
}

.product-card-body h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.product-card-body p {
    color: var(--gray-500);
    font-size: 0.92rem;
    line-height: 1.7;
    margin-bottom: 16px;
}

.product-card-link {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.92rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.product-card-link:hover {
    gap: 12px;
}

/* ============================================
   ADVANTAGES SECTION
   ============================================ */
.advantages {
    padding: var(--section-padding);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.advantage-card {
    text-align: center;
    padding: 48px 30px;
    border-radius: 20px;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--gray-100);
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-bg);
}

.advantage-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

.advantage-icon.blue { background: var(--primary-bg); color: var(--primary); }
.advantage-icon.green { background: #ecfdf5; color: var(--accent-green); }
.advantage-icon.orange { background: #fffbeb; color: var(--accent-orange); }

.advantage-card h3 {
    font-size: 1.25rem;
    margin-bottom: 14px;
}

.advantage-card p {
    color: var(--gray-500);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
    padding: 100px 0;
    background: var(--primary-gradient);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: 
        radial-gradient(ellipse at 30% 50%, rgba(255,255,255,0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 50%, rgba(59,130,246,0.15) 0%, transparent 50%);
}

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

.cta-section h2 {
    font-size: 2.25rem;
    color: var(--white);
    margin-bottom: 16px;
}

.cta-section p {
    color: rgba(255,255,255,0.8);
    font-size: 1.1rem;
    margin-bottom: 36px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

/* ============================================
   PARTNERS / CLIENTS
   ============================================ */
.partners {
    padding: 70px 0;
    background: var(--white);
}

.partners-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 50px;
    flex-wrap: wrap;
    opacity: 0.5;
}

.partner-item {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--gray-300);
    letter-spacing: 2px;
    transition: var(--transition);
}

.partner-item:hover {
    opacity: 0.7;
    color: var(--gray-500);
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
    background: var(--gray-900);
    color: rgba(255,255,255,0.7);
    padding: 80px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-about h3 {
    color: var(--white);
    font-size: 1.3rem;
    margin-bottom: 18px;
}

.footer-about p {
    font-size: 0.92rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

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

.footer-social a {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(255,255,255,0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.6);
    transition: var(--transition);
    font-size: 1.1rem;
}

.footer-social a:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-3px);
}

.footer-links h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 20px;
}

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

.footer-links ul li a {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links ul li a:hover {
    color: var(--white);
    padding-left: 4px;
}

.footer-contact h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 20px;
}

.footer-contact-item {
    display: flex;
    gap: 12px;
    margin-bottom: 14px;
    font-size: 0.9rem;
}

.footer-contact-item i {
    color: var(--primary-light);
    width: 18px;
    margin-top: 4px;
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.4);
}

/* ============================================
   PAGE BANNER
   ============================================ */
.page-banner {
    padding: 160px 0 80px;
    background: var(--primary-gradient);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: 
        radial-gradient(ellipse at 30% 50%, rgba(255,255,255,0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 50%, rgba(59,130,246,0.15) 0%, transparent 50%);
}

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

.page-banner h1 {
    font-size: 2.5rem;
    color: var(--white);
    margin-bottom: 12px;
}

.page-banner p {
    color: rgba(255,255,255,0.8);
    font-size: 1.05rem;
}

.breadcrumb {
    margin-top: 16px;
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
}

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

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

.breadcrumb span {
    margin: 0 8px;
}

/* ============================================
   ABOUT PAGE
   ============================================ */

/* Company Intro */
.about-intro {
    padding: var(--section-padding);
}

.about-intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-intro-text h2 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.about-intro-text p {
    margin-bottom: 16px;
    line-height: 1.9;
}

.about-intro-image {
    border-radius: 20px;
    overflow: hidden;
    position: relative;
    background: var(--primary-bg);
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: var(--primary-lighter);
}

/* Timeline */
.timeline-section {
    padding: var(--section-padding);
    background: var(--bg-warm);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: linear-gradient(to bottom, var(--primary-light), var(--primary), var(--primary-light));
}

.timeline-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 50px;
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-content {
    width: calc(50% - 40px);
    padding: 24px;
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
}

.timeline-content h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--primary);
}

.timeline-content .timeline-year {
    font-size: 0.85rem;
    color: var(--primary-light);
    font-weight: 600;
    margin-bottom: 6px;
}

.timeline-content p {
    font-size: 0.92rem;
    color: var(--gray-500);
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary);
    border: 4px solid var(--primary-bg);
    top: 28px;
}

/* Culture Cards */
.culture-section {
    padding: var(--section-padding);
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.culture-card {
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--gray-100);
}

.culture-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.culture-card .culture-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
}

.culture-card h3 {
    font-size: 1.15rem;
    margin-bottom: 12px;
}

.culture-card p {
    color: var(--gray-500);
    font-size: 0.92rem;
    line-height: 1.7;
}

/* Certifications */
.cert-section {
    padding: var(--section-padding);
    background: var(--bg-warm);
}

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

.cert-card {
    padding: 36px 24px;
    background: var(--white);
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.cert-card i {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.cert-card h4 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.cert-card p {
    font-size: 0.85rem;
    color: var(--gray-500);
}

/* ============================================
   PRODUCTS PAGE
   ============================================ */
.products-page {
    padding: var(--section-padding);
}

/* Product Tabs */
.product-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.product-tab {
    padding: 12px 28px;
    border-radius: 50px;
    border: 2px solid var(--gray-300);
    background: transparent;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--gray-500);
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-body);
}

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

.product-tab.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
    box-shadow: var(--shadow-blue);
}

.product-detail {
    display: none;
    animation: fadeUp 0.5s ease;
}

.product-detail.active {
    display: block;
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    background: var(--white);
    border-radius: 24px;
    padding: 50px;
    box-shadow: var(--shadow-sm);
}

.product-detail-visual {
    aspect-ratio: 1;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 6rem;
}

.product-detail-info h3 {
    font-size: 1.75rem;
    margin-bottom: 16px;
}

.product-detail-info .product-desc {
    color: var(--gray-500);
    line-height: 1.8;
    margin-bottom: 20px;
}

.product-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 24px;
}

.product-feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.92rem;
    color: var(--gray-700);
}

.product-feature-item i {
    color: var(--accent-green);
    font-size: 0.9rem;
}

.product-applications {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.product-applications span {
    padding: 6px 14px;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.82rem;
    font-weight: 500;
}

/* Service Process */
.process-section {
    padding: var(--section-padding);
    background: var(--bg-warm);
}

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

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

.process-step-number {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 700;
}

.process-step h4 {
    font-size: 1.05rem;
    margin-bottom: 10px;
}

.process-step p {
    font-size: 0.88rem;
    color: var(--gray-500);
    line-height: 1.7;
}

/* ============================================
   CONTACT PAGE
   ============================================ */
.contact-section {
    padding: var(--section-padding);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
}

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

.contact-info-card {
    display: flex;
    gap: 18px;
    padding: 24px;
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.contact-info-card:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.contact-info-icon {
    width: 50px;
    height: 50px;
    min-width: 50px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.contact-info-icon.blue { background: var(--primary-bg); color: var(--primary); }
.contact-info-icon.green { background: #ecfdf5; color: var(--accent-green); }
.contact-info-icon.orange { background: #fffbeb; color: var(--accent-orange); }
.contact-info-icon.purple { background: #f5f3ff; color: var(--accent-purple); }

.contact-info-card h4 {
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.contact-info-card p {
    color: var(--gray-500);
    font-size: 0.9rem;
}

/* Contact Form */
.contact-form-wrap {
    background: var(--white);
    border-radius: 24px;
    padding: 44px;
    box-shadow: var(--shadow-lg);
}

.contact-form-wrap h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.contact-form-wrap .form-desc {
    color: var(--gray-500);
    margin-bottom: 28px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--gray-100);
    border-radius: 12px;
    font-size: 0.95rem;
    font-family: var(--font-body);
    transition: var(--transition);
    background: var(--bg-warm);
    color: var(--gray-700);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 4px rgba(59,130,246,0.1);
    background: var(--white);
}

.form-group textarea {
    height: 140px;
    resize: vertical;
}

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

.submit-btn {
    width: 100%;
    padding: 16px;
    background: var(--primary-gradient);
    color: var(--white);
    border: none;
    border-radius: 12px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-body);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-blue);
}

/* Map Placeholder */
.map-section {
    padding: 0 0 80px;
}

.map-placeholder {
    height: 400px;
    border-radius: 20px;
    overflow: hidden;
    background: var(--gray-100);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--gray-500);
    position: relative;
}

.map-placeholder i {
    font-size: 3rem;
    margin-bottom: 16px;
    color: var(--gray-300);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

.animate-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.animate-on-scroll-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.animate-on-scroll-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ============================================
   BACK TO TOP
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: var(--primary-gradient);
    color: var(--white);
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* ============================================
   WHATSAPP FLOAT (Contact page)
   ============================================ */
.whatsapp-float {
    position: fixed;
    bottom: 90px;
    right: 30px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #25D366;
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    box-shadow: 0 4px 20px rgba(37,211,102,0.4);
    z-index: 999;
    transition: var(--transition);
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(37,211,102,0.5);
    color: var(--white);
}