/* ========================================
   品那高安全科技 - 样式表
   ======================================== */

/* CSS Variables */
:root {
    --primary-color: #1A3A5C;
    --primary-light: #2A4A6C;
    --primary-dark: #0A2A4C;
    --accent-color: #E8793A;
    --accent-light: #F5A623;
    --accent-gradient: linear-gradient(135deg, #E8793A 0%, #F5A623 100%);
    --bg-white: #FFFFFF;
    --bg-light: #F8FAFC;
    --bg-gray: #F1F5F9;
    --text-dark: #1E293B;
    --text-gray: #64748B;
    --text-light: #94A3B8;
    --border-color: #E2E8F0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-full: 9999px;
}

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

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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-dark);
    background: var(--bg-white);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul, ol {
    list-style: none;
}

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

input, textarea, button {
    font-family: inherit;
    font-size: inherit;
    border: none;
    outline: none;
}

button {
    cursor: pointer;
    background: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   Header & Navigation
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
    border-bottom: 1px solid transparent;
}

.header.scrolled {
    box-shadow: var(--shadow-md);
    border-bottom-color: var(--border-color);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    height: 40px;
    width: auto;
    max-width: 200px;
}

/* Navigation */
.nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    position: relative;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-dark);
    padding: 8px 0;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width var(--transition-normal);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--primary-color);
    transition: all var(--transition-fast);
}

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

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

.nav-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;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 50%, var(--primary-light) 100%);
    overflow: hidden;
    padding-top: 72px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-particles {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(232, 121, 58, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(245, 166, 35, 0.1) 0%, transparent 50%);
}

.hero .container {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
    padding: 80px 24px;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-title {
    font-size: clamp(48px, 8vw, 72px);
    font-weight: 700;
    color: var(--bg-white);
    line-height: 1.2;
    margin-bottom: 16px;
}

.hero-title .highlight {
    color: var(--accent-color);
}

.hero-subtitle {
    font-size: clamp(20px, 3vw, 28px);
    font-weight: 300;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 24px;
}

.hero-desc {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 40px;
    line-height: 1.8;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-normal);
}

.btn-primary {
    background: var(--accent-gradient);
    color: var(--bg-white);
    box-shadow: 0 4px 15px rgba(232, 121, 58, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(232, 121, 58, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--bg-white);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

/* Hero Visual */
.hero-visual {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 500px;
}

.hex-grid {
    position: relative;
    width: 300px;
    height: 300px;
}

.hex {
    position: absolute;
    width: 100px;
    height: 115px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(232, 121, 58, 0.3);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    animation: hexFloat 6s ease-in-out infinite;
}

.hex::before {
    content: '';
    position: absolute;
    inset: 4px;
    background: rgba(232, 121, 58, 0.1);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
}

.hex-1 { top: 0; left: 50%; transform: translateX(-50%); animation-delay: 0s; }
.hex-2 { top: 50%; left: 0; transform: translateY(-50%); animation-delay: 1s; }
.hex-3 { top: 50%; right: 0; transform: translateY(-50%); animation-delay: 2s; }
.hex-4 { bottom: 0; left: 25%; transform: translateX(-50%); animation-delay: 3s; }
.hex-5 { bottom: 0; right: 25%; transform: translateX(50%); animation-delay: 4s; }
.hex-6 { top: 25%; left: 50%; transform: translateX(-50%); animation-delay: 5s; }

@keyframes hexFloat {
    0%, 100% { transform: translateY(0) scale(1); opacity: 0.6; }
    50% { transform: translateY(-10px) scale(1.05); opacity: 1; }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 13px;
    animation: scrollBounce 2s ease-in-out infinite;
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.wheel {
    width: 3px;
    height: 8px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 2px;
    animation: scrollWheel 1.5s ease-in-out infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

@keyframes scrollWheel {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(8px); }
}

/* ========================================
   Stats Section
   ======================================== */
.stats {
    background: var(--bg-white);
    padding: 60px 0;
    margin-top: -60px;
    position: relative;
    z-index: 10;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    background: var(--bg-white);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--shadow-xl);
}

.stat-item {
    text-align: center;
    padding: 20px;
    position: relative;
}

.stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 60%;
    background: var(--border-color);
}

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

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

.stat-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
    display: inline;
}

.stat-unit {
    font-size: 20px;
    font-weight: 500;
    color: var(--accent-color);
    display: inline;
}

.stat-label {
    font-size: 14px;
    color: var(--text-gray);
    margin-top: 8px;
}

/* ========================================
   Section Common Styles
   ======================================== */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 3px;
    color: var(--accent-color);
    margin-bottom: 12px;
    text-transform: uppercase;
}

.section-title {
    font-size: clamp(32px, 5vw, 42px);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   About Section
   ======================================== */
.about {
    background: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-bottom: 80px;
}

.about-intro p {
    font-size: 16px;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 20px;
}

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

.feature-card {
    background: var(--bg-white);
    padding: 32px 24px;
    border-radius: var(--border-radius);
    text-align: center;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    padding: 12px;
    background: linear-gradient(135deg, rgba(232, 121, 58, 0.1) 0%, rgba(245, 166, 35, 0.1) 100%);
    border-radius: 50%;
    color: var(--accent-color);
}

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

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.6;
}

/* Honors */
.honors {
    background: var(--bg-white);
    padding: 60px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.honors-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 40px;
}

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

.honor-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 24px 16px;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-normal);
    background: var(--bg-light);
}

.honor-item:hover {
    background: var(--bg-gray);
    transform: translateY(-3px);
}

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

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

.honor-item span {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
    line-height: 1.5;
}

.honor-item small {
    font-size: 12px;
    color: var(--text-gray);
}

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

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.product-card {
    background: var(--bg-white);
    border-radius: var(--border-radius);
    padding: 32px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-color);
}

.product-card:hover::before {
    transform: scaleX(1);
}

.product-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 20px;
    padding: 14px;
    background: linear-gradient(135deg, rgba(26, 58, 92, 0.08) 0%, rgba(26, 58, 92, 0.04) 100%);
    border-radius: var(--border-radius-sm);
    color: var(--primary-color);
}

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

.product-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.product-desc {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 20px;
}

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

.product-features li {
    font-size: 12px;
    color: var(--text-dark);
    background: var(--bg-gray);
    padding: 6px 12px;
    border-radius: var(--border-radius-full);
    transition: all var(--transition-fast);
}

.product-card:hover .product-features li {
    background: rgba(232, 121, 58, 0.1);
    color: var(--accent-color);
}

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

.apps-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}

.app-card {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.app-visual {
    height: 180px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.app-visual::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(232, 121, 58, 0.2) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.app-card:hover .app-visual::before {
    opacity: 1;
}

.app-icon-large {
    width: 64px;
    height: 64px;
    color: rgba(255, 255, 255, 0.8);
    transition: all var(--transition-normal);
}

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

.app-card:hover .app-icon-large {
    transform: scale(1.1);
    color: var(--bg-white);
}

.app-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--primary-color);
    padding: 20px 16px;
    text-align: center;
}

.app-label h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--bg-white);
    margin-bottom: 4px;
}

.app-label p {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
}

/* Scenarios */
.scenarios {
    background: var(--bg-white);
    padding: 60px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.scenarios-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 40px;
}

.scenarios-grid {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.scenario-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 24px 32px;
    background: var(--bg-light);
    border-radius: var(--border-radius);
    transition: all var(--transition-normal);
}

.scenario-item:hover {
    background: var(--primary-color);
    transform: translateY(-5px);
}

.scenario-item svg {
    width: 48px;
    height: 48px;
    color: var(--primary-color);
    transition: color var(--transition-normal);
}

.scenario-item:hover svg {
    color: var(--bg-white);
}

.scenario-item span {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-dark);
    transition: color var(--transition-normal);
}

.scenario-item:hover span {
    color: var(--bg-white);
}

/* ========================================
   Cases Section
   ======================================== */
.cases {
    background: var(--bg-white);
}

/* Clients Distribution */
.clients-distribution {
    display: flex;
    align-items: center;
    gap: 60px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    padding: 60px;
    border-radius: var(--border-radius);
    margin-bottom: 60px;
}

.distribution-text {
    flex: 1;
}

.distribution-text h3 {
    font-size: 28px;
    font-weight: 600;
    color: var(--bg-white);
    margin-bottom: 16px;
}

.distribution-text p {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
}

.distribution-stats {
    display: flex;
    gap: 48px;
}

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

.dist-number {
    display: block;
    font-size: 48px;
    font-weight: 700;
    color: var(--accent-color);
    line-height: 1;
}

.dist-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 8px;
}

/* Featured Cases */
.featured-cases {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 60px;
}

.featured-case {
    background: var(--bg-light);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.featured-case:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.case-image {
    height: 160px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-placeholder {
    width: 64px;
    height: 64px;
    color: rgba(255, 255, 255, 0.3);
}

.case-placeholder svg {
    width: 100%;
    height: 100%;
}

.case-info {
    padding: 24px;
}

.case-info h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 12px;
}

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

/* Service Philosophy */
.service-philosophy {
    background: var(--bg-gray);
    padding: 48px;
    border-radius: var(--border-radius);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.philosophy-icon {
    width: 64px;
    height: 64px;
    color: var(--accent-color);
}

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

.philosophy-text {
    font-size: 20px;
    font-weight: 500;
    color: var(--primary-color);
    max-width: 700px;
    line-height: 1.6;
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
    background: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

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

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 24px;
    background: var(--bg-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

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

.contact-icon {
    width: 48px;
    height: 48px;
    padding: 10px;
    background: linear-gradient(135deg, rgba(232, 121, 58, 0.1) 0%, rgba(245, 166, 35, 0.1) 100%);
    border-radius: 50%;
    color: var(--accent-color);
    flex-shrink: 0;
}

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

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

.contact-label {
    font-size: 13px;
    color: var(--text-gray);
}

.contact-value {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-dark);
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--bg-white);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.contact-form-wrapper h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 32px;
    text-align: center;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px 20px;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 15px;
    color: var(--text-dark);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent-color);
    background: var(--bg-white);
    box-shadow: 0 0 0 3px rgba(232, 121, 58, 0.1);
}

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

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

.btn-submit {
    width: 100%;
    padding: 16px 32px;
    font-size: 16px;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--primary-color);
    color: var(--bg-white);
    padding: 60px 0 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 60px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    max-width: 320px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.footer-logo .logo-svg {
    width: 48px;
    height: 48px;
}

.footer-logo-img {
    height: 36px;
    width: auto;
    max-width: 180px;
}

.footer-logo-text {
    display: flex;
    flex-direction: column;
}

.footer-logo-text span {
    font-size: 18px;
    font-weight: 600;
}

.footer-logo-text small {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
}

.footer-links {
    display: flex;
    gap: 80px;
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-column a {
    display: block;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 12px;
    transition: all var(--transition-fast);
}

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

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

.footer-bottom p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 4px;
}

/* ========================================
   Animations
   ======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

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

/* Staggered animations */
.products-grid .product-card:nth-child(1) { transition-delay: 0.1s; }
.products-grid .product-card:nth-child(2) { transition-delay: 0.2s; }
.products-grid .product-card:nth-child(3) { transition-delay: 0.3s; }
.products-grid .product-card:nth-child(4) { transition-delay: 0.4s; }
.products-grid .product-card:nth-child(5) { transition-delay: 0.5s; }
.products-grid .product-card:nth-child(6) { transition-delay: 0.6s; }
.products-grid .product-card:nth-child(7) { transition-delay: 0.7s; }
.products-grid .product-card:nth-child(8) { transition-delay: 0.8s; }
.products-grid .product-card:nth-child(9) { transition-delay: 0.9s; }

.apps-grid .app-card:nth-child(1) { transition-delay: 0.1s; }
.apps-grid .app-card:nth-child(2) { transition-delay: 0.2s; }
.apps-grid .app-card:nth-child(3) { transition-delay: 0.3s; }
.apps-grid .app-card:nth-child(4) { transition-delay: 0.4s; }
.apps-grid .app-card:nth-child(5) { transition-delay: 0.5s; }

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-btns {
        justify-content: center;
    }

    .hero-visual {
        display: none;
    }

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

    .stat-item:nth-child(2)::after {
        display: none;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .honors {
        padding: 40px;
    }

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

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

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

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

    .footer-content {
        flex-direction: column;
        gap: 40px;
    }

    .footer-links {
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: 24px;
        gap: 0;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        display: block;
        padding: 16px 0;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-toggle {
        display: flex;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        padding: 24px;
        gap: 16px;
    }

    .stat-item {
        padding: 16px 8px;
    }

    .stat-item::after {
        display: none;
    }

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

    .section {
        padding: 60px 0;
    }

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

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

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

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

    .apps-grid .app-card:last-child {
        grid-column: span 2;
    }

    .scenarios-grid {
        gap: 20px;
    }

    .scenario-item {
        padding: 16px 24px;
    }

    .clients-distribution {
        flex-direction: column;
        padding: 40px 24px;
        text-align: center;
    }

    .distribution-stats {
        gap: 32px;
    }

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

    .philosophy-text {
        font-size: 16px;
    }

    .footer-links {
        flex-direction: column;
        gap: 32px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        padding-top: 72px;
    }

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

    .hero-subtitle {
        font-size: 18px;
    }

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

    .btn {
        width: 100%;
    }

    .stats {
        margin-top: -40px;
    }

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

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

    .apps-grid .app-card:last-child {
        grid-column: auto;
    }

    .scenarios {
        padding: 32px 20px;
    }

    .scenarios-grid {
        flex-direction: column;
        gap: 16px;
    }

    .scenario-item {
        width: 100%;
    }

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