/* ==========================================================================
   吉安市井开区赵阑商贸有限公司 - 官方网站样式表
   Domain: eftov.com | ICP: 赣ICP备2026015846号-2
   ========================================================================== */

:root {
    --primary: #0a192f;
    --primary-light: #112240;
    --primary-card: rgba(17, 34, 64, 0.85);
    --accent: #00d2ff;
    --accent-blue: #0066ff;
    --accent-gold: #e6b761;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --bg-dark: #070d19;
    --bg-light: #f8fafc;
    --border-glow: rgba(0, 210, 255, 0.25);
    --border-subtle: rgba(255, 255, 255, 0.1);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 24px;
    --shadow-subtle: 0 10px 30px -10px rgba(2, 12, 27, 0.7);
    --shadow-glow: 0 0 25px rgba(0, 210, 255, 0.2);
    --transition-fast: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-secondary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition-fast);
    background: rgba(7, 13, 25, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.navbar.scrolled {
    padding: 12px 0;
    background: rgba(7, 13, 25, 0.92);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    border-bottom: 1px solid var(--border-glow);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

.brand-logo .logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 900;
    font-size: 1.3rem;
    box-shadow: var(--shadow-glow);
}

.brand-logo .company-name-highlight {
    color: var(--accent);
}

.brand-logo .domain-badge {
    font-size: 0.75rem;
    background: rgba(0, 210, 255, 0.12);
    color: var(--accent);
    padding: 2px 8px;
    border-radius: 20px;
    border: 1px solid rgba(0, 210, 255, 0.3);
    margin-left: 6px;
    font-weight: 500;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 6px 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent));
    transition: var(--transition-fast);
    border-radius: 2px;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    border: none;
    outline: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent));
    color: #fff;
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 210, 255, 0.5);
}

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

.btn-outline:hover {
    background: rgba(0, 210, 255, 0.1);
    box-shadow: var(--shadow-glow);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-toggle span {
    width: 26px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
    border-radius: 2px;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    padding-top: 140px;
    padding-bottom: 80px;
    display: flex;
    align-items: center;
    background: radial-gradient(circle at 70% 30%, rgba(0, 102, 255, 0.15) 0%, transparent 60%),
                radial-gradient(circle at 20% 80%, rgba(0, 210, 255, 0.1) 0%, transparent 50%);
    overflow: hidden;
}

.hero-bg-overlay {
    position: absolute;
    top: 0;
    right: 0;
    width: 55%;
    height: 100%;
    background: url('../images/hero.png') no-repeat center center;
    background-size: cover;
    opacity: 0.45;
    mask-image: linear-gradient(to right, transparent 0%, black 40%, black 100%);
    -webkit-mask-image: linear-gradient(to right, transparent 0%, black 30%, black 100%);
    pointer-events: none;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 6px 16px;
    background: rgba(0, 210, 255, 0.1);
    border: 1px solid rgba(0, 210, 255, 0.3);
    border-radius: 30px;
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
    backdrop-filter: blur(5px);
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); opacity: 0.8; }
    50% { transform: scale(1.3); opacity: 1; }
    100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -0.5px;
}

.hero-title .gradient-text {
    background: linear-gradient(135deg, #ffffff 0%, var(--accent) 50%, var(--accent-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 620px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 50px;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    padding-top: 30px;
    border-top: 1px solid var(--border-subtle);
}

.stat-item .stat-num {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-primary);
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.stat-item .stat-num span {
    color: var(--accent);
}

.stat-item .stat-label {
    font-size: 0.88rem;
    color: var(--text-muted);
}

/* Floating Card visual in Hero */
.hero-card-preview {
    position: relative;
    background: var(--primary-card);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-subtle), var(--shadow-glow);
    backdrop-filter: blur(16px);
}

.hero-card-preview::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    bottom: -1px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--accent-blue), transparent 50%, var(--accent));
    z-index: -1;
    opacity: 0.3;
}

.card-header-badge {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card-header-badge .icp-pill {
    font-size: 0.8rem;
    color: var(--accent-gold);
    background: rgba(224, 183, 97, 0.1);
    padding: 4px 12px;
    border-radius: 20px;
    border: 1px solid rgba(224, 183, 97, 0.3);
}

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

.feature-mini-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-fast);
}

.feature-mini-item:hover {
    background: rgba(0, 210, 255, 0.08);
    border-color: rgba(0, 210, 255, 0.3);
    transform: translateX(4px);
}

.feature-mini-item .icon-box {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.2), rgba(0, 210, 255, 0.2));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 1.1rem;
}

/* ==========================================================================
   Section Layout & Standard Elements
   ========================================================================== */
.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-subtitle {
    display: inline-block;
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: 16px;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
}

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

.about-image-wrapper {
    position: relative;
}

.about-image {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-subtle);
    border: 1px solid var(--border-subtle);
    overflow: hidden;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.about-image:hover img {
    transform: scale(1.03);
}

.floating-experience-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    border: 1px solid var(--border-glow);
    padding: 20px 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-subtle);
    display: flex;
    align-items: center;
    gap: 16px;
}

.floating-experience-badge .years {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
}

.floating-experience-badge .text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.about-content-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin: 30px 0;
}

.about-check-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
}

.about-check-item .check-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(0, 210, 255, 0.15);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    flex-shrink: 0;
    margin-top: 2px;
}

/* ==========================================================================
   Services & Business Section
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--primary-light);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 36px 30px;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent));
    opacity: 0;
    transition: var(--transition-fast);
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-subtle), var(--shadow-glow);
}

.service-card:hover::before {
    opacity: 1;
}

.service-icon {
    width: 60px;
    height: 60px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.15), rgba(0, 210, 255, 0.15));
    border: 1px solid rgba(0, 210, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--accent);
    margin-bottom: 24px;
}

.service-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.service-desc {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 24px;
    flex-grow: 1;
}

.service-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.service-tag {
    font-size: 0.75rem;
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    color: var(--text-secondary);
}

/* ==========================================================================
   Product Center & Showcase
   ========================================================================== */
.product-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 22px;
    border-radius: 30px;
    background: var(--primary-light);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.filter-btn.active, .filter-btn:hover {
    background: var(--accent-blue);
    color: #fff;
    border-color: var(--accent-blue);
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.4);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.product-card {
    background: var(--primary-light);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    overflow: hidden;
    transition: var(--transition-fast);
}

.product-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-subtle);
}

.product-thumb {
    height: 200px;
    background: #0f1c35;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-thumb-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, var(--primary-light), transparent);
}

.product-category-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(7, 13, 25, 0.8);
    backdrop-filter: blur(8px);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--accent);
    border: 1px solid rgba(0, 210, 255, 0.3);
    z-index: 2;
}

.product-icon-visual {
    font-size: 3.5rem;
    color: rgba(0, 210, 255, 0.8);
    transition: var(--transition-fast);
}

.product-card:hover .product-icon-visual {
    transform: scale(1.1);
    color: var(--accent);
}

.product-info {
    padding: 20px;
}

.product-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.product-specs {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.product-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.inquire-link {
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.inquire-link:hover {
    gap: 8px;
}

/* ==========================================================================
   Why Choose Us (Advantages)
   ========================================================================== */
.advantages-bg {
    background: linear-gradient(180deg, var(--bg-dark) 0%, #0d1a30 50%, var(--bg-dark) 100%);
    border-y: 1px solid var(--border-subtle);
}

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

.adv-item {
    background: rgba(17, 34, 64, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.06);
    padding: 30px 24px;
    border-radius: var(--radius-md);
    text-align: center;
    transition: var(--transition-fast);
}

.adv-item:hover {
    background: rgba(17, 34, 64, 0.9);
    border-color: var(--border-glow);
    transform: translateY(-5px);
}

.adv-icon-circle {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.2), rgba(0, 210, 255, 0.2));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    color: var(--accent);
    border: 1px solid var(--border-glow);
}

.adv-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.adv-desc {
    font-size: 0.88rem;
    color: var(--text-muted);
}

/* ==========================================================================
   Contact & Location Section
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.contact-info-card {
    background: var(--primary-light);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 30px;
}

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

.contact-icon-box {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(0, 210, 255, 0.1);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.contact-value {
    font-size: 1.05rem;
    color: var(--text-primary);
    font-weight: 600;
    margin-top: 2px;
}

.contact-form {
    background: var(--primary-light);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 40px;
}

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

.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    background: rgba(7, 13, 25, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 10px rgba(0, 210, 255, 0.2);
    background: rgba(7, 13, 25, 0.9);
}

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

.form-submit-btn {
    width: 100%;
    padding: 14px;
    font-size: 1rem;
}

/* Form alert message */
.form-alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    margin-top: 15px;
    display: none;
}

.form-alert.success {
    display: block;
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #10b981;
}

/* ==========================================================================
   Footer Component
   ========================================================================== */
.footer {
    background: #040811;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 70px;
    padding-bottom: 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 50px;
}

.footer-col-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 8px;
}

.footer-col-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--accent);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    text-align: center;
    font-size: 0.88rem;
    color: var(--text-muted);
}

.icp-link {
    color: var(--accent-gold);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
    transition: var(--transition-fast);
}

.icp-link:hover {
    color: var(--accent);
    text-decoration: underline;
}

.icp-badge {
    background: rgba(224, 183, 97, 0.12);
    border: 1px solid rgba(224, 183, 97, 0.3);
    padding: 2px 8px;
    border-radius: 4px;
}

/* Quick Floating Bar */
.floating-contact-bar {
    position: fixed;
    right: 24px;
    bottom: 30px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.floating-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-light);
    border: 1px solid var(--border-glow);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
    cursor: pointer;
    transition: var(--transition-fast);
}

.floating-btn:hover {
    background: var(--accent-blue);
    color: #fff;
    transform: scale(1.1);
}

/* Back to top button */
#backToTop {
    opacity: 0;
    visibility: hidden;
}

#backToTop.show {
    opacity: 1;
    visibility: visible;
}

/* Modal Window */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(4, 8, 17, 0.85);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-container {
    background: var(--primary-light);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 550px;
    padding: 30px;
    position: relative;
    box-shadow: var(--shadow-subtle), var(--shadow-glow);
    transform: translateY(20px);
    transition: var(--transition-fast);
}

.modal-overlay.active .modal-container {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}

.modal-close:hover {
    color: var(--accent);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
    .hero-title { font-size: 2.8rem; }
    .hero-grid { grid-template-columns: 1fr; gap: 40px; }
    .hero-card-preview { display: none; }
    .about-grid { grid-template-columns: 1fr; }
    .advantages-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .navbar { padding: 14px 0; }
    .mobile-toggle { display: flex; }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(7, 13, 25, 0.98);
        backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 30px 24px;
        gap: 20px;
        border-bottom: 1px solid var(--border-glow);
        transform: translateY(-150%);
        transition: var(--transition-fast);
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .hero-title { font-size: 2.2rem; }
    .hero-stats { grid-template-columns: repeat(3, 1fr); gap: 10px; }
    .stat-item .stat-num { font-size: 1.6rem; }
    .contact-grid { grid-template-columns: 1fr; }
    .advantages-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
}