/* ========================================
   腾龙集团企业官网 - 高饱和分块扁平化设计
   ======================================== */

/* CSS Variables - Design System */
:root {
    /* Colors */
    --text-primary: #0A0A0A;
    --bg-primary: #0D0A14;
    --bg-secondary: #1A1525;
    --neon-green: #39FF14;
    --purple: #BF00FF;
    --purple-text: #D24DFF;
    --pink: #FF1493;
    --cyan: #00FFFF;
    --orange: #FFAA00;
    --pink-alt: #FF006E;
    --lime: #CCFF00;
    
    /* Spacing */
    --block-gap: 48px;
    --section-padding: 80px;
    --container-max: 1200px;
    
    /* Typography */
    --font-primary: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
    --type-size-lg: 32px;
    
    /* Border Radius - Core visual fingerprint */
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    
    /* Transitions */
    --transition: 200ms ease;
    --transition-slow: 300ms ease;
}

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

html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 900;
    line-height: 1.1;
}

h2 {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 800;
}

h3 {
    font-size: 1.25rem;
    font-weight: 700;
}

p {
    max-width: 34em;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    min-height: 44px;
    text-align: center;
}

.btn:focus-visible {
    outline: 3px solid var(--neon-green);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--neon-green);
    color: var(--bg-primary);
    border-color: var(--neon-green);
}

.btn-primary:hover {
    background: #2DE010;
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--purple);
    color: #fff;
    border-color: var(--purple);
}

.btn-secondary:hover {
    background: #A000E0;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--neon-green);
    border-color: var(--neon-green);
}

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

.btn-ghost {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--neon-green);
}

.btn-ghost:hover {
    background: var(--neon-green);
    color: var(--bg-primary);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 16px;
}

.btn-block {
    display: flex;
    width: 100%;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--bg-primary);
    border-bottom: 2px solid var(--neon-green);
    padding: 16px 0;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.navbar-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 700;
    color: #fff;
}

.navbar-logo svg {
    flex-shrink: 0;
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.navbar-nav a {
    color: #fff;
    font-size: 15px;
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

.navbar-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--neon-green);
    transition: width var(--transition);
}

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

.navbar-nav a.active {
    color: var(--neon-green);
}

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

.navbar-toggle span {
    width: 24px;
    height: 2px;
    background: #fff;
    transition: all var(--transition);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    padding: var(--section-padding) 0;
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--block-gap);
    align-items: center;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--neon-green);
    margin-bottom: 16px;
    padding: 8px 16px;
    border: 2px solid var(--neon-green);
    border-radius: var(--radius);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.05;
    color: #fff;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 18px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 32px;
    max-width: 500px;
}

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

.hero-visual {
    position: relative;
    height: 400px;
}

.hero-block {
    position: absolute;
    border-radius: var(--radius);
}

.hero-block-1 {
    width: 200px;
    height: 200px;
    background: var(--neon-green);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: float 6s ease-in-out infinite;
}

.hero-block-2 {
    width: 120px;
    height: 120px;
    background: var(--purple);
    top: 20%;
    right: 20%;
    animation: float 8s ease-in-out infinite reverse;
}

.hero-block-3 {
    width: 80px;
    height: 80px;
    background: var(--pink);
    bottom: 20%;
    left: 20%;
    animation: float 7s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* ========================================
   Style Chips
   ======================================== */
.style-chips {
    padding: 24px 0;
    background: var(--bg-secondary);
    border-top: 2px solid var(--purple);
    border-bottom: 2px solid var(--purple);
}

.chip-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}

.chip {
    font-size: 13px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius);
    border: 2px solid;
}

.chip-style {
    color: var(--neon-green);
    border-color: var(--neon-green);
}

.chip-era {
    color: var(--purple);
    border-color: var(--purple);
}

.chip-complexity {
    color: var(--pink);
    border-color: var(--pink);
}

.chip-best {
    color: var(--cyan);
    border-color: var(--cyan);
}

/* ========================================
   Sections
   ======================================== */
.section {
    padding: var(--section-padding) 0;
}

.section-alt {
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--block-gap);
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--neon-green);
    margin-bottom: 12px;
    padding: 6px 12px;
    border: 2px solid var(--neon-green);
    border-radius: var(--radius);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   About Preview
   ======================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--block-gap);
    align-items: center;
}

.about-text h2 {
    color: #fff;
    margin-bottom: 16px;
}

.about-text p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 16px;
}

.about-stats {
    display: flex;
    gap: 32px;
    margin: 32px 0;
}

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

.stat-number {
    font-size: 32px;
    font-weight: 800;
    color: var(--neon-green);
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 4px;
}

.about-visual {
    position: relative;
    height: 400px;
}

.about-block {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--neon-green) 0%, var(--purple) 100%);
    border-radius: var(--radius);
    position: relative;
    overflow: hidden;
}

.about-block::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 150px;
    height: 150px;
    background: var(--bg-primary);
    border-radius: 50%;
}

/* ========================================
   Features Grid
   ======================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-primary);
    border: 2px solid transparent;
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition);
    display: block;
}

.feature-card:hover {
    border-color: var(--neon-green);
    transform: translateY(-4px);
}

.feature-card:focus-visible {
    outline: 3px solid var(--neon-green);
    outline-offset: 2px;
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius);
}

.feature-title {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

.feature-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 16px;
    line-height: 1.5;
}

.feature-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--neon-green);
}

/* ========================================
   Team Preview
   ======================================== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.team-card {
    background: var(--bg-secondary);
    border: 2px solid transparent;
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition);
}

.team-card:hover {
    border-color: var(--purple);
    transform: translateY(-4px);
}

.team-avatar {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.team-name {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 8px;
}

.team-role {
    font-size: 14px;
    color: var(--neon-green);
    margin-bottom: 12px;
}

.team-bio {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.5;
}

/* ========================================
   Contact Section
   ======================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--block-gap);
}

.contact-form {
    background: var(--bg-primary);
    border: 2px solid var(--neon-green);
    border-radius: var(--radius);
    padding: 32px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    font-family: var(--font-primary);
    background: var(--bg-secondary);
    border: 2px solid transparent;
    border-radius: var(--radius);
    color: #fff;
    transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--neon-green);
}

.form-group input:focus-visible,
.form-group textarea:focus-visible,
.form-group select:focus-visible {
    outline: 3px solid var(--neon-green);
    outline-offset: 2px;
}

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

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

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: var(--bg-primary);
    border: 2px solid var(--purple);
    border-radius: var(--radius);
}

.contact-item h4 {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

/* ========================================
   Page Hero (Inner Pages)
   ======================================== */
.page-hero {
    padding: 60px 0;
    background: var(--bg-secondary);
    border-bottom: 2px solid var(--neon-green);
    text-align: center;
}

.page-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    color: #fff;
    margin-bottom: 16px;
}

.page-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.7);
}

.back-link {
    display: inline-block;
    font-size: 14px;
    color: var(--neon-green);
    margin-bottom: 16px;
}

.back-link:hover {
    text-decoration: underline;
}

/* ========================================
   About Detail Page
   ======================================== */
.about-detail-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--block-gap);
}

.about-detail-content h2 {
    color: #fff;
    margin-bottom: 16px;
    margin-top: 32px;
}

.about-detail-content h2:first-child {
    margin-top: 0;
}

.about-detail-content p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 16px;
}

.timeline {
    margin-top: 32px;
    position: relative;
    padding-left: 32px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--neon-green);
}

.timeline-item {
    position: relative;
    padding-bottom: 32px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -37px;
    top: 4px;
    width: 12px;
    height: 12px;
    background: var(--neon-green);
    border-radius: 50%;
}

.timeline-year {
    font-size: 14px;
    font-weight: 700;
    color: var(--neon-green);
    margin-bottom: 8px;
}

.timeline-content h3 {
    color: #fff;
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.sidebar-card {
    background: var(--bg-secondary);
    border: 2px solid var(--purple);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;
}

.sidebar-card h3 {
    color: #fff;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--purple);
}

.sidebar-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.sidebar-stat {
    text-align: center;
    padding: 16px;
    background: var(--bg-primary);
    border-radius: var(--radius);
}

.sidebar-stat .stat-number {
    font-size: 24px;
}

.culture-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.culture-item h4 {
    font-size: 14px;
    color: var(--neon-green);
    margin-bottom: 4px;
}

.culture-item p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

/* ========================================
   Advantages Grid
   ======================================== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.advantage-card {
    background: var(--bg-primary);
    border: 2px solid transparent;
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition);
}

.advantage-card:hover {
    border-color: var(--neon-green);
    transform: translateY(-4px);
}

.advantage-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.advantage-card h3 {
    color: #fff;
    margin-bottom: 12px;
}

.advantage-card p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

/* ========================================
   Products List Page
   ======================================== */
.products-list {
    display: flex;
    flex-direction: column;
    gap: 48px;
}

.product-item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 32px;
    align-items: flex-start;
    padding: 32px;
    background: var(--bg-secondary);
    border: 2px solid transparent;
    border-radius: var(--radius);
    transition: all var(--transition);
}

.product-item:hover {
    border-color: var(--neon-green);
}

.product-item-icon {
    width: 120px;
    height: 120px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-item-content h2 {
    color: #fff;
    margin-bottom: 16px;
}

.product-item-content p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 20px;
}

.product-features {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 24px;
}

.product-features li {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    padding-left: 20px;
    position: relative;
}

.product-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 8px;
    height: 8px;
    background: var(--neon-green);
    border-radius: 2px;
}

/* ========================================
   Product Detail Page
   ======================================== */
.product-detail-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--block-gap);
}

.product-detail-icon {
    width: 120px;
    height: 120px;
    background: var(--neon-green);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-primary);
    margin-bottom: 32px;
}

.product-detail-content h2 {
    color: #fff;
    margin-bottom: 16px;
    margin-top: 32px;
}

.product-detail-content h2:first-of-type {
    margin-top: 0;
}

.product-detail-content p,
.product-detail-content li {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 12px;
}

.product-detail-content ul {
    list-style: none;
    padding-left: 0;
}

.product-detail-content li {
    padding-left: 24px;
    position: relative;
}

.product-detail-content li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    background: var(--neon-green);
    border-radius: 2px;
}

.product-detail-sidebar .sidebar-card {
    margin-bottom: 24px;
}

.sidebar-links {
    list-style: none;
}

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

.sidebar-links a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    transition: color var(--transition);
}

.sidebar-links a:hover {
    color: var(--neon-green);
}

/* ========================================
   Team Full Page
   ======================================== */
.team-full-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.team-full-card {
    background: var(--bg-secondary);
    border: 2px solid transparent;
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
    transition: all var(--transition);
}

.team-full-card:hover {
    border-color: var(--purple);
    transform: translateY(-4px);
}

.team-full-avatar {
    width: 120px;
    height: 120px;
    margin: 0 auto 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.team-full-name {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 8px;
}

.team-full-role {
    font-size: 14px;
    color: var(--neon-green);
    margin-bottom: 16px;
}

.team-full-bio {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    margin-bottom: 20px;
}

.team-full-expertise {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.expertise-tag {
    font-size: 12px;
    font-weight: 500;
    padding: 4px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--neon-green);
    border-radius: var(--radius);
    color: var(--neon-green);
}

/* ========================================
   Contact Full Page
   ======================================== */
.contact-full-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--block-gap);
}

.contact-form-wrapper {
    background: var(--bg-secondary);
    border: 2px solid var(--neon-green);
    border-radius: var(--radius);
    padding: 40px;
}

.contact-form-wrapper h2 {
    color: #fff;
    margin-bottom: 12px;
}

.contact-form-wrapper > p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 32px;
}

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

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

.contact-info-card {
    background: var(--bg-secondary);
    border: 2px solid var(--purple);
    border-radius: var(--radius);
    padding: 24px;
}

.contact-info-card h3 {
    color: #fff;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--purple);
}

.contact-info-card > p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
    font-size: 14px;
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 20px;
}

.contact-info-item:last-child {
    margin-bottom: 0;
}

.contact-info-item h4 {
    font-size: 14px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.contact-info-item p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--bg-primary);
    border-top: 2px solid var(--neon-green);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--block-gap);
    margin-bottom: 40px;
}

.footer-brand h4 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
}

.footer-links h5 {
    font-size: 14px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition);
}

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

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    max-width: none;
}

/* ========================================
   Utilities
   ======================================== */
.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

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

.mb-40 {
    margin-bottom: 40px;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .features-grid,
    .team-grid,
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .team-full-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px;
        --block-gap: 32px;
    }
    
    .navbar-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 24px;
        border-bottom: 2px solid var(--neon-green);
    }
    
    .navbar-nav.active {
        display: flex;
    }
    
    .navbar-toggle {
        display: flex;
    }
    
    .navbar .btn {
        display: none;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
    }
    
    .hero-visual {
        height: 250px;
    }
    
    .about-grid,
    .contact-grid,
    .about-detail-grid,
    .product-detail-grid,
    .contact-full-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid,
    .team-grid,
    .advantages-grid,
    .team-full-grid {
        grid-template-columns: 1fr;
    }
    
    .product-item {
        grid-template-columns: 1fr;
    }
    
    .product-item-icon {
        width: 80px;
        height: 80px;
    }
    
    .product-features {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .about-stats {
        flex-wrap: wrap;
        gap: 16px;
    }
    
    .stat-item {
        flex: 1;
        min-width: 100px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .chip-group {
        gap: 8px;
    }
    
    .chip {
        font-size: 11px;
        padding: 6px 12px;
    }
}