/* ========================================
   梦鸿飞企业官网 - 视差叙事·流动渐变风格
   ======================================== */

/* CSS Variables - Design System */
:root {
    /* Colors */
    --primary-text: #1C2A42;
    --page-bg: #FBF8F2;
    --secondary-text: #445470;
    --accent-deep: #0B1B33;
    --accent-mid: #24406B;
    --accent-warm: #FF8C5A;
    --accent-gold: #F5C97B;
    
    /* Gradients */
    --gradient-flow: linear-gradient(135deg, #0B1B33 0%, #24406B 25%, #FF8C5A 75%, #F5C97B 100%);
    --gradient-aurora: linear-gradient(45deg, #0B1B33, #24406B, #FF8C5A, #F5C97B, #24406B, #0B1B33);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 96px;
    
    /* Border Radius */
    --radius-core: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(11, 27, 51, 0.08);
    --shadow-md: 0 4px 16px rgba(11, 27, 51, 0.12);
    --shadow-lg: 0 8px 32px rgba(11, 27, 51, 0.16);
    --shadow-glow: 0 0 40px rgba(255, 140, 90, 0.3);
    
    /* Transitions */
    --transition-fast: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 400ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 600ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Layout */
    --container-max: 1200px;
    --nav-height: 72px;
}

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

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

@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(--primary-text);
    background-color: var(--page-bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Animated Background */
.bg-animated {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: var(--gradient-aurora);
    background-size: 400% 400%;
    animation: gradientFlow 12s ease infinite;
    opacity: 0.03;
}

@keyframes gradientFlow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--primary-text);
}

h1 {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 700;
}

h3 {
    font-size: 1.5rem;
    font-weight: 700;
}

h4 {
    font-size: 1.25rem;
    font-weight: 600;
}

p {
    margin-bottom: var(--space-md);
    color: var(--secondary-text);
}

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

a:hover {
    color: var(--accent-warm);
}

/* Focus Visible */
*:focus-visible {
    outline: 2px solid var(--accent-warm);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(251, 248, 242, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(28, 42, 66, 0.08);
    z-index: 1000;
    transition: all var(--transition-normal);
}

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

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-text);
}

.nav-brand svg {
    width: 32px;
    height: 32px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    list-style: none;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-warm);
    transition: width var(--transition-normal);
}

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

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

.nav-cta {
    display: inline-flex;
    align-items: center;
    padding: var(--space-sm) var(--space-lg);
    background: var(--primary-text);
    color: var(--page-bg);
    border-radius: var(--radius-core);
    font-size: 14px;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.nav-cta:hover {
    background: var(--accent-warm);
    color: var(--page-bg);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Mobile Menu Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

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

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-core);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    min-height: 44px;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-text);
    color: var(--page-bg);
}

.btn-primary:hover {
    background: var(--accent-warm);
    color: var(--page-bg);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-secondary:hover {
    background: var(--primary-text);
    color: var(--page-bg);
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--primary-text);
    padding: var(--space-sm) var(--space-md);
}

.btn-ghost:hover {
    color: var(--accent-warm);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-height);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(ellipse, rgba(255, 140, 90, 0.15) 0%, transparent 70%);
    animation: heroGlow 8s ease-in-out infinite;
}

@keyframes heroGlow {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-5%, 5%) scale(1.1); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 720px;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent-warm);
    margin-bottom: var(--space-lg);
    padding: var(--space-xs) var(--space-md);
    background: rgba(255, 140, 90, 0.1);
    border-radius: var(--radius-sm);
}

.hero-title {
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, var(--primary-text) 0%, var(--accent-mid) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--secondary-text);
    margin-bottom: var(--space-2xl);
    max-width: 540px;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.hero-visual {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 45%;
    max-width: 500px;
    aspect-ratio: 1;
}

.hero-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.6;
    animation: float 6s ease-in-out infinite;
}

.hero-shape-1 {
    width: 300px;
    height: 300px;
    background: var(--accent-warm);
    top: 10%;
    right: 10%;
}

.hero-shape-2 {
    width: 200px;
    height: 200px;
    background: var(--accent-mid);
    bottom: 20%;
    right: 30%;
    animation-delay: -2s;
}

.hero-shape-3 {
    width: 150px;
    height: 150px;
    background: var(--accent-gold);
    top: 40%;
    right: 50%;
    animation-delay: -4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

/* ========================================
   Section Styles
   ======================================== */
.section {
    padding: var(--space-4xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent-warm);
    margin-bottom: var(--space-md);
}

.section-title {
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--secondary-text);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   Cards
   ======================================== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.card {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-core);
    padding: var(--space-xl);
    transition: all var(--transition-normal);
    border: 1px solid rgba(28, 42, 66, 0.08);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(255, 140, 90, 0.3);
}

.card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-warm) 0%, var(--accent-gold) 100%);
    border-radius: var(--radius-core);
    margin-bottom: var(--space-lg);
}

.card-icon svg {
    width: 28px;
    height: 28px;
    stroke: white;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

.card-text {
    color: var(--secondary-text);
    margin-bottom: var(--space-md);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-warm);
}

.card-link:hover {
    gap: var(--space-sm);
}

/* ========================================
   Product Cards
   ======================================== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
}

.product-card {
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--radius-core);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid rgba(28, 42, 66, 0.08);
}

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

.product-image {
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--accent-mid) 0%, var(--accent-deep) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-image::before {
    content: '';
    position: absolute;
    width: 150%;
    height: 150%;
    background: radial-gradient(circle, rgba(255, 140, 90, 0.3) 0%, transparent 70%);
    animation: productGlow 4s ease-in-out infinite;
}

@keyframes productGlow {
    0%, 100% { transform: translate(-25%, -25%) scale(1); }
    50% { transform: translate(-25%, -25%) scale(1.2); }
}

.product-image svg {
    width: 80px;
    height: 80px;
    stroke: rgba(255, 255, 255, 0.9);
    position: relative;
    z-index: 1;
}

.product-content {
    padding: var(--space-lg);
}

.product-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-warm);
    background: rgba(255, 140, 90, 0.1);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
}

.product-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

.product-desc {
    font-size: 14px;
    color: var(--secondary-text);
    margin-bottom: var(--space-md);
}

/* ========================================
   Team Cards
   ======================================== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-xl);
}

.team-card {
    text-align: center;
    background: rgba(255, 255, 255, 0.8);
    border-radius: var(--radius-core);
    padding: var(--space-xl);
    transition: all var(--transition-normal);
    border: 1px solid rgba(28, 42, 66, 0.08);
}

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

.team-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto var(--space-lg);
    background: linear-gradient(135deg, var(--accent-warm) 0%, var(--accent-gold) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
}

.team-name {
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
}

.team-role {
    font-size: 14px;
    color: var(--accent-warm);
    font-weight: 600;
    margin-bottom: var(--space-md);
}

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

/* ========================================
   About Section
   ======================================== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.about-text h2 {
    margin-bottom: var(--space-lg);
}

.about-text p {
    margin-bottom: var(--space-md);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.stat-item {
    text-align: center;
    padding: var(--space-lg);
    background: rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-core);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-warm);
    line-height: 1;
}

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

.about-visual {
    position: relative;
    aspect-ratio: 1;
    background: linear-gradient(135deg, var(--accent-mid) 0%, var(--accent-deep) 100%);
    border-radius: var(--radius-xl);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-visual::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 140, 90, 0.4) 0%, transparent 60%);
    animation: aboutGlow 10s ease-in-out infinite;
}

@keyframes aboutGlow {
    0%, 100% { transform: translate(-25%, -25%) scale(1); }
    50% { transform: translate(-25%, -25%) scale(1.3); }
}

.about-visual svg {
    width: 60%;
    height: 60%;
    stroke: rgba(255, 255, 255, 0.9);
    position: relative;
    z-index: 1;
}

/* ========================================
   Chips / Tags
   ======================================== */
.chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
    margin-bottom: var(--space-2xl);
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    font-size: 13px;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(28, 42, 66, 0.15);
    border-radius: var(--radius-core);
    color: var(--secondary-text);
}

.chip-accent {
    background: linear-gradient(135deg, var(--accent-warm) 0%, var(--accent-gold) 100%);
    color: white;
    border-color: transparent;
}

/* ========================================
   Form Styles
   ======================================== */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-text);
    margin-bottom: var(--space-sm);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--space-md);
    font-size: 15px;
    font-family: var(--font-primary);
    color: var(--primary-text);
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid rgba(28, 42, 66, 0.15);
    border-radius: var(--radius-core);
    transition: all var(--transition-fast);
    min-height: 44px;
}

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

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent-warm);
    box-shadow: 0 0 0 4px rgba(255, 140, 90, 0.15);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--primary-text);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
    margin-bottom: var(--space-md);
}

.footer-brand svg {
    width: 32px;
    height: 32px;
}

.footer-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    max-width: 300px;
}

.footer-title {
    font-size: 14px;
    font-weight: 600;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

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

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-copyright {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-icp {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-icp a {
    color: rgba(255, 255, 255, 0.6);
}

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

/* ========================================
   Page Header (for inner pages)
   ======================================== */
.page-header {
    padding: calc(var(--nav-height) + var(--space-4xl)) 0 var(--space-3xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(11, 27, 51, 0.03) 0%, rgba(255, 140, 90, 0.05) 100%);
    z-index: -1;
}

.page-header h1 {
    margin-bottom: var(--space-md);
}

.page-header p {
    font-size: 1.125rem;
    color: var(--secondary-text);
    max-width: 600px;
    margin: 0 auto;
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-size: 14px;
    color: var(--secondary-text);
    margin-bottom: var(--space-lg);
}

.breadcrumb a {
    color: var(--secondary-text);
}

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

.breadcrumb-separator {
    color: rgba(68, 84, 112, 0.4);
}

/* ========================================
   Product Detail
   ======================================== */
.product-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: start;
}

.product-detail-image {
    aspect-ratio: 1;
    background: linear-gradient(135deg, var(--accent-mid) 0%, var(--accent-deep) 100%);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    sticky: top;
}

.product-detail-image::before {
    content: '';
    position: absolute;
    width: 150%;
    height: 150%;
    background: radial-gradient(circle, rgba(255, 140, 90, 0.3) 0%, transparent 60%);
    animation: productGlow 6s ease-in-out infinite;
}

.product-detail-image svg {
    width: 50%;
    height: 50%;
    stroke: rgba(255, 255, 255, 0.9);
    position: relative;
    z-index: 1;
}

.product-detail-info h1 {
    font-size: 2rem;
    margin-bottom: var(--space-md);
}

.product-detail-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-warm);
    background: rgba(255, 140, 90, 0.1);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-md);
}

.product-detail-desc {
    font-size: 1.125rem;
    color: var(--secondary-text);
    margin-bottom: var(--space-xl);
}

.product-features {
    list-style: none;
    margin-bottom: var(--space-xl);
}

.product-features li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    color: var(--secondary-text);
}

.product-features li::before {
    content: '';
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--accent-warm) 0%, var(--accent-gold) 100%);
    border-radius: 50%;
    margin-top: 2px;
}

.product-specs {
    background: rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-core);
    padding: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.product-specs h3 {
    font-size: 1rem;
    margin-bottom: var(--space-md);
}

.spec-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
}

.spec-item {
    display: flex;
    justify-content: space-between;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid rgba(28, 42, 66, 0.08);
    font-size: 14px;
}

.spec-label {
    color: var(--secondary-text);
}

.spec-value {
    font-weight: 600;
    color: var(--primary-text);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 1024px) {
    .about-content,
    .product-detail {
        grid-template-columns: 1fr;
    }
    
    .about-visual {
        max-width: 400px;
        margin: 0 auto;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--page-bg);
        flex-direction: column;
        padding: var(--space-xl);
        gap: var(--space-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-visual {
        display: none;
    }
    
    .hero-content {
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .card-grid,
    .product-grid,
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-desc {
        max-width: 100%;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .spec-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .section {
        padding: var(--space-3xl) 0;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
}

/* ========================================
   Utility Classes
   ======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }

.hidden { display: none; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}