/* ========================================
   夏尔传媒 XIAER MEDIA - 主样式表
   郑州高校桌贴广告 · 河南校园场景营销
   ======================================== */

/* === Design Tokens === */
:root {
    --primary: #1e3a5f;
    --primary-dark: #0f2440;
    --primary-light: #2c5282;
    --accent: #f59e0b;
    --accent-dark: #d97706;
    --text: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --bg: #ffffff;
    --bg-alt: #f8fafc;
    --bg-dark: #0f172a;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.8;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

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

h1 { font-size: 2.5rem; margin-bottom: 1rem; }
h2 { font-size: 2rem; margin-bottom: 0.75rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

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

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

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

/* === Layout === */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.section-sm {
    padding: 60px 0;
}

.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 60px;
}

.section-header h2 {
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
}

.section-header p {
    margin-top: 16px;
    font-size: 1.125rem;
}

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

/* === Header === */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

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

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.logo:hover { color: var(--primary); }

.logo-mark {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 800;
    font-size: 1.1rem;
    letter-spacing: -1px;
}

.logo-text span {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 400;
    display: block;
    line-height: 1;
    margin-top: 2px;
    letter-spacing: 1px;
}

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

.main-nav a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 4px 0;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

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

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

.nav-cta {
    background: var(--primary) !important;
    color: #fff !important;
    padding: 8px 20px !important;
    border-radius: var(--radius-sm);
    font-weight: 600 !important;
}

.nav-cta::after { display: none !important; }

.nav-cta:hover {
    background: var(--primary-light) !important;
    color: #fff !important;
    transform: translateY(-1px);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    border: none;
    background: none;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
}
.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* === Hero === */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, #f0f4f8 0%, #e8eef5 50%, #f5f0eb 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(30,58,95,0.05) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    max-width: 680px;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(30, 58, 95, 0.08);
    color: var(--primary);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
}

.hero h1 {
    font-size: 3.25rem;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.hero h1 .highlight {
    color: var(--accent);
}

.hero-desc {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 36px;
    line-height: 1.8;
}

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

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

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-light);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-accent {
    background: var(--accent);
    color: #fff;
}

.btn-accent:hover {
    background: var(--accent-dark);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-ghost {
    background: rgba(30,58,95,0.06);
    color: var(--primary);
}

.btn-ghost:hover {
    background: rgba(30,58,95,0.12);
    color: var(--primary);
}

/* === Stats === */
.stats-bar {
    background: var(--primary);
    padding: 48px 0;
}

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

.stat-item {
    color: #fff;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.8);
}

/* === Services === */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.service-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.service-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(30,58,95,0.08), rgba(30,58,95,0.04));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.service-card p {
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 0;
}

/* === Advantages === */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.advantage-card {
    display: flex;
    gap: 20px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: var(--transition);
}

.advantage-card:hover {
    box-shadow: var(--shadow);
    border-color: var(--primary-light);
}

.advantage-num {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    background: var(--primary);
    color: #fff;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
}

.advantage-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.advantage-card p {
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* === Cases === */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.case-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

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

.case-header {
    padding: 24px 24px 0;
}

.case-tag {
    display: inline-block;
    background: rgba(245, 158, 11, 0.1);
    color: var(--accent-dark);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 12px;
}

.case-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.case-body {
    padding: 0 24px 24px;
}

.case-body p {
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.case-metrics {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.case-metric {
    background: var(--bg-alt);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    text-align: center;
}

.case-metric .value {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.case-metric .label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* === Brands === */
.brands-bar {
    padding: 60px 0;
    text-align: center;
}

.brands-bar h3 {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 32px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.brands-list {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 48px;
    flex-wrap: wrap;
}

.brand-item {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-muted);
    opacity: 0.5;
    transition: var(--transition);
}

.brand-item:hover {
    opacity: 0.8;
    color: var(--primary);
}

/* === Coverage Map === */
.coverage-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.coverage-city {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 20px;
    text-align: center;
    transition: var(--transition);
}

.coverage-city:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

.coverage-city h4 {
    font-size: 1.1rem;
    color: var(--primary);
    margin-bottom: 4px;
}

.coverage-city .count {
    font-size: 0.85rem;
    color: var(--accent-dark);
    font-weight: 600;
    margin-bottom: 12px;
}

.coverage-city ul {
    list-style: none;
    text-align: left;
}

.coverage-city li {
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 3px 0;
    border-bottom: 1px solid var(--bg-alt);
}

.coverage-city li:last-child {
    border-bottom: none;
}

/* === CTA Section === */
.cta-section {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    padding: 80px 0;
    text-align: center;
    color: #fff;
}

.cta-section h2 {
    color: #fff;
    font-size: 2.25rem;
    margin-bottom: 16px;
}

.cta-section p {
    color: rgba(255,255,255,0.8);
    font-size: 1.15rem;
    margin-bottom: 36px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-section .btn-accent {
    font-size: 1.1rem;
    padding: 16px 40px;
}

/* === About Page === */
.page-hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #f0f4f8, #e8eef5);
    text-align: center;
}

.page-hero h1 {
    font-size: 2.75rem;
}

.page-hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 16px auto 0;
}

/* Timeline */
.timeline {
    position: relative;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 48px;
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
    padding-right: calc(50% + 40px);
    text-align: right;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
    padding-left: calc(50% + 40px);
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background: var(--accent);
    border: 3px solid var(--bg);
    border-radius: 50%;
    box-shadow: 0 0 0 3px var(--accent);
    z-index: 1;
}

.timeline-content {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: var(--transition);
}

.timeline-content:hover {
    box-shadow: var(--shadow);
}

.timeline-year {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 4px;
}

.timeline-content h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* Values */
.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.value-card {
    text-align: center;
    padding: 40px 28px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.value-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.value-card h3 {
    margin-bottom: 12px;
}

/* === Contact Page === */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.contact-info-card {
    display: flex;
    gap: 16px;
    padding: 24px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 20px;
    transition: var(--transition);
}

.contact-info-card:hover {
    box-shadow: var(--shadow);
    border-color: var(--primary-light);
}

.contact-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: rgba(30,58,95,0.08);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

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

.contact-info-card p {
    font-size: 0.9rem;
    margin-bottom: 0;
    color: var(--text-secondary);
}

.contact-form {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px;
}

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

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
    background: var(--bg);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(30,58,95,0.1);
}

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

/* === Blog === */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.blog-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

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

.blog-thumb {
    height: 180px;
    background: linear-gradient(135deg, var(--bg-alt), #e2e8f0);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
}

.blog-content {
    padding: 24px;
}

.blog-meta {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.blog-tag {
    background: rgba(30,58,95,0.08);
    color: var(--primary);
    padding: 2px 10px;
    border-radius: 12px;
    font-weight: 500;
}

.blog-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    line-height: 1.4;
}

.blog-card h3 a {
    color: var(--text);
}

.blog-card h3 a:hover {
    color: var(--primary);
}

.blog-excerpt {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-read-more {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
}

.blog-read-more:hover {
    color: var(--accent);
}

/* === Article Page === */
.article-header {
    padding: 140px 0 60px;
    background: linear-gradient(135deg, #f0f4f8, #e8eef5);
}

.article-header .container {
    max-width: 800px;
}

.article-meta {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.article-header h1 {
    font-size: 2.25rem;
    line-height: 1.3;
}

.article-body {
    padding: 60px 0;
}

.article-body .container {
    max-width: 800px;
}

.article-body h2 {
    font-size: 1.5rem;
    margin-top: 48px;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--bg-alt);
}

.article-body h3 {
    font-size: 1.25rem;
    margin-top: 32px;
    margin-bottom: 12px;
}

.article-body p {
    font-size: 1.05rem;
    line-height: 1.9;
    margin-bottom: 1.5rem;
}

.article-body ul, .article-body ol {
    margin: 16px 0 24px 24px;
}

.article-body li {
    margin-bottom: 8px;
    font-size: 1.05rem;
    line-height: 1.8;
}

.article-body blockquote {
    border-left: 4px solid var(--accent);
    padding: 16px 24px;
    margin: 24px 0;
    background: var(--bg-alt);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
    color: var(--text-secondary);
}

.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
}

.article-body th, .article-body td {
    padding: 12px 16px;
    border: 1px solid var(--border);
    text-align: left;
}

.article-body th {
    background: var(--bg-alt);
    font-weight: 600;
}

/* === FAQ === */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--primary-light);
}

.faq-question {
    padding: 20px 24px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 1rem;
    background: var(--bg);
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--bg-alt);
}

.faq-arrow {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
    color: var(--text-muted);
}

.faq-item.active .faq-arrow {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer-inner {
    padding: 0 24px 20px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

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

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand .logo {
    color: #fff;
    margin-bottom: 16px;
}

.footer-brand .logo-mark {
    background: var(--accent);
}

.footer-brand p {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
    line-height: 1.7;
}

.footer-col h4 {
    color: #fff;
    font-size: 1rem;
    margin-bottom: 20px;
}

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

.footer-col li {
    margin-bottom: 10px;
}

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

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

.footer-contact-item {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 0.9rem;
    align-items: flex-start;
}

.footer-contact-item span:first-child {
    flex-shrink: 0;
    width: 20px;
    text-align: center;
}

.footer-bottom {
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.4);
}

.footer-bottom a {
    color: rgba(255,255,255,0.4);
}

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

/* === Responsive === */
@media (max-width: 1024px) {
    .services-grid,
    .cases-grid,
    .blog-grid,
    .values-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    .timeline::before { left: 24px; }
    .timeline-dot { left: 24px; }
    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        padding-left: 60px;
        padding-right: 0;
        flex-direction: row;
        text-align: left;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }

    .section { padding: 60px 0; }

    .hero { padding: 120px 0 60px; }
    .hero h1 { font-size: 2.25rem; }
    .hero-desc { font-size: 1.05rem; }

    .main-nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg);
        flex-direction: column;
        justify-content: flex-start;
        padding: 32px 24px;
        gap: 0;
        transform: translateX(100%);
        transition: transform 0.3s ease;
    }

    .main-nav.open {
        transform: translateX(0);
    }

    .main-nav a {
        display: block;
        padding: 16px 0;
        font-size: 1.1rem;
        border-bottom: 1px solid var(--border);
    }

    .main-nav a::after { display: none; }

    .hamburger {
        display: flex;
    }

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

    .services-grid,
    .cases-grid,
    .blog-grid,
    .values-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
    }

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

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }

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

    .hero-actions .btn {
        width: 100%;
    }

    .page-hero h1 {
        font-size: 2rem;
    }

    .article-header h1 {
        font-size: 1.75rem;
    }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 1.75rem; }
    .stat-number { font-size: 2rem; }
    .coverage-grid { grid-template-columns: 1fr; }
}

/* === Utility === */
.text-center { text-align: center; }
.text-accent { color: var(--accent); }
.text-primary { color: var(--primary); }
.mt-2 { margin-top: 16px; }
.mt-4 { margin-top: 32px; }
.mb-2 { margin-bottom: 16px; }
.mb-4 { margin-bottom: 32px; }

/* === Animations === */
.fade-up {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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