/* ========================================
   腾龙公司科技开户 - 企业官网样式
   蓝图白×行动橙 · 理性紧凑风格
   ======================================== */

/* CSS Variables */
:root {
    /* 色彩体系 */
    --canvas-bg: #fbfbfc;
    --card-bg: #ffffff;
    --light-gray: #f0f2f5;
    --text-primary: #1a1f2e;
    --text-secondary: #5f6368;
    --border-color: #e8eaed;
    --accent-orange: #ec652b;
    --accent-orange-hover: #d95a24;
    --blue-tag: #e8f0fe;
    --green-tag: #e6f4ea;
    --status-green: #16ca2e;
    --footer-bg: #1a1f2e;
    
    /* 阴影 */
    --card-shadow: rgba(0, 0, 0, 0.04) 0px 2px 8px;
    --card-shadow-hover: rgba(0, 0, 0, 0.08) 0px 4px 12px;
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-full: 50%;
    
    /* 间距 */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 48px;
    --spacing-xxl: 80px;
    
    /* 字体 */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', Consolas, 'Courier New', monospace;
}

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

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

body {
    font-family: var(--font-primary);
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--canvas-bg);
    background-image: radial-gradient(circle, rgba(0, 0, 0, 0.03) 1px, transparent 1px);
    background-size: 12px 12px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.15;
    color: var(--text-primary);
}

h1 { font-size: 48px; letter-spacing: -0.5px; }
h2 { font-size: 36px; letter-spacing: -0.03em; }
h3 { font-size: 20px; letter-spacing: -0.02em; font-weight: 600; }
h4 { font-size: 18px; font-weight: 500; }

p {
    color: var(--text-secondary);
    line-height: 1.5;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease-out;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--canvas-bg);
    border-bottom: 1px solid var(--border-color);
    transition: border-color 0.2s ease-out;
}

.navbar.scrolled {
    border-bottom-color: #d0d4d8;
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.navbar-logo {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.navbar-nav a {
    display: block;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 400;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all 0.2s ease-out;
    position: relative;
}

.navbar-nav a:hover {
    color: var(--text-primary);
    background: rgba(26, 31, 46, 0.04);
}

.navbar-nav a.active {
    color: var(--text-primary);
    font-weight: 500;
}

.navbar-nav a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--accent-orange);
}

.navbar-cta {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease-out;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-family: var(--font-primary);
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease-out;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-orange);
    color: #ffffff;
}

.btn-primary:hover {
    background: var(--accent-orange-hover);
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background: rgba(236, 101, 43, 0.05);
}

.btn-ghost {
    background: transparent;
    color: var(--accent-orange);
    padding: 8px 0;
    font-weight: 500;
}

.btn-ghost:hover {
    opacity: 0.8;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    padding-top: 144px;
    padding-bottom: var(--spacing-xxl);
}

.hero-grid {
    display: grid;
    grid-template-columns: 55% 45%;
    gap: 48px;
    align-items: center;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.hero-tag::before {
    content: '';
    display: block;
    width: 8px;
    height: 8px;
    background: var(--accent-orange);
    border-radius: var(--radius-full);
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.5px;
    margin-bottom: 16px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 32px;
}

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

/* Hero Panel */
.hero-panel {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--card-shadow);
    padding: 32px;
}

.data-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.data-card {
    text-align: center;
    padding: 16px;
}

.data-card-value {
    font-family: var(--font-mono);
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.data-card-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* Flow Chart */
.flow-chart {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}

.flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.flow-step-icon {
    width: 48px;
    height: 48px;
    background: var(--light-gray);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.flow-step-label {
    font-size: 12px;
    color: var(--text-secondary);
    text-align: center;
}

.flow-arrow {
    color: var(--border-color);
    font-size: 20px;
}

/* ========================================
   Section Common
   ======================================== */
.section {
    padding: var(--spacing-xxl) 0;
}

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

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
}

/* ========================================
   Capability Matrix
   ======================================== */
.matrix-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--card-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--card-shadow);
}

.matrix-table th,
.matrix-table td {
    padding: 16px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.matrix-table th {
    background: var(--light-gray);
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
}

.matrix-table th:first-child,
.matrix-table td:first-child {
    text-align: left;
    font-weight: 500;
}

.matrix-table tbody tr:nth-child(even) {
    background: var(--canvas-bg);
}

.matrix-table tbody tr:hover {
    background: var(--light-gray);
}

.matrix-table tbody tr:last-child td {
    border-bottom: none;
}

/* Check marks */
.check-full,
.check-half,
.check-empty {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
}

.check-full {
    background: var(--accent-orange);
    color: #ffffff;
}

.check-half {
    background: var(--border-color);
    color: var(--text-secondary);
}

.check-empty {
    background: transparent;
}

/* ========================================
   Timeline Cases
   ======================================== */
.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 48px;
}

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

.timeline-dot {
    position: absolute;
    left: -33px;
    top: 24px;
    width: 12px;
    height: 12px;
    background: var(--accent-orange);
    border-radius: var(--radius-full);
    transition: transform 0.3s ease-out;
}

.timeline-item:hover .timeline-dot {
    transform: scale(1.3);
}

.timeline-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--card-shadow);
    padding: 24px;
    transition: box-shadow 0.2s ease-out;
}

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

.timeline-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.timeline-card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.timeline-stages {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.stage-tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    font-size: 13px;
    border-radius: var(--radius-sm);
}

.stage-problem {
    background: var(--light-gray);
    color: var(--text-secondary);
}

.stage-solution {
    background: var(--blue-tag);
    color: var(--text-primary);
}

.stage-result {
    background: var(--green-tag);
}

.stage-result strong {
    color: var(--accent-orange);
    font-family: var(--font-mono);
    font-size: 16px;
}

/* ========================================
   Team & Credentials
   ======================================== */
.team-credentials {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.team-members {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
}

.team-member {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.team-avatar {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    background: var(--light-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--text-secondary);
    filter: grayscale(100%);
    transition: filter 0.4s ease-out;
}

.team-member:hover .team-avatar {
    filter: grayscale(0%);
}

.team-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.team-role {
    font-size: 12px;
    color: var(--text-secondary);
}

.credentials-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.credential-badge {
    width: 80px;
    height: 80px;
    background: var(--card-bg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--card-shadow);
    filter: grayscale(100%);
    transition: filter 0.4s ease-out;
}

.credential-badge:hover {
    filter: grayscale(0%);
}

.trust-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
    padding-top: 48px;
    border-top: 1px solid var(--border-color);
}

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

.trust-stat-value {
    font-family: var(--font-mono);
    font-size: 40px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

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

.trust-stat::after {
    content: '';
    display: block;
    width: 24px;
    height: 3px;
    background: var(--accent-orange);
    margin: 12px auto 0;
}

/* ========================================
   CTA Form Section
   ======================================== */
.cta-section {
    background: var(--light-gray);
    padding: var(--spacing-xxl) 0;
}

.cta-grid {
    display: grid;
    grid-template-columns: 60% 40%;
    gap: 48px;
    align-items: start;
}

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

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    font-family: var(--font-primary);
    font-size: 14px;
    color: var(--text-primary);
    background: var(--card-bg);
    border: none;
    border-bottom: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: border-color 0.2s ease-out;
}

.form-input:focus {
    outline: none;
    border-bottom-color: var(--accent-orange);
    border-bottom-width: 2px;
}

.form-input::placeholder {
    color: #9aa0a6;
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.receipt-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--card-shadow);
    padding: 32px;
    text-align: center;
}

.receipt-icon {
    width: 48px;
    height: 48px;
    background: var(--blue-tag);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: var(--accent-orange);
    font-size: 24px;
}

.receipt-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

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

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--footer-bg);
    color: #ffffff;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.footer-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
}

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

.footer-links li {
    margin-bottom: 8px;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.2s ease-out;
}

.footer-links a:hover {
    color: #ffffff;
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-copyright {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-seo {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.3);
    margin-top: 8px;
}

/* ========================================
   Page Header (Subpages)
   ======================================== */
.page-header {
    padding: 120px 0 60px;
    text-align: center;
}

.page-title {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
}

.page-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
}

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

.service-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--card-shadow);
    padding: 32px;
    transition: box-shadow 0.2s ease-out, transform 0.2s ease-out;
}

.service-card:hover {
    box-shadow: var(--card-shadow-hover);
    transform: translateY(-2px);
}

.service-icon {
    width: 56px;
    height: 56px;
    background: var(--light-gray);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 20px;
}

.service-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.service-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.service-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--accent-orange);
}

/* ========================================
   Case Studies Page
   ======================================== */
.filter-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.filter-tag {
    padding: 8px 16px;
    font-size: 14px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease-out;
}

.filter-tag:hover,
.filter-tag.active {
    background: var(--accent-orange);
    border-color: var(--accent-orange);
    color: #ffffff;
}

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

.case-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--card-shadow);
    overflow: hidden;
    transition: box-shadow 0.2s ease-out, transform 0.2s ease-out;
}

.case-card:hover {
    box-shadow: var(--card-shadow-hover);
    transform: translateY(-2px);
}

.case-card-header {
    padding: 24px;
    background: var(--light-gray);
}

.case-logo {
    width: 48px;
    height: 48px;
    background: var(--card-bg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 12px;
}

.case-client {
    font-size: 16px;
    font-weight: 600;
}

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

.case-stage {
    margin-bottom: 16px;
}

.case-stage:last-child {
    margin-bottom: 0;
}

.case-stage-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.case-stage-content {
    font-size: 14px;
    color: var(--text-primary);
}

.case-result {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--accent-orange);
}

/* ========================================
   About Page
   ======================================== */
.about-intro {
    max-width: 800px;
    margin: 0 auto 60px;
    text-align: center;
}

.about-intro p {
    font-size: 16px;
    line-height: 1.8;
}

.about-timeline {
    position: relative;
    padding: 40px 0;
}

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

.timeline-year {
    display: flex;
    align-items: center;
    margin-bottom: 48px;
}

.timeline-year:nth-child(odd) {
    flex-direction: row;
}

.timeline-year:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-year-content {
    width: 45%;
    padding: 24px;
    background: var(--card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--card-shadow);
}

.timeline-year-dot {
    width: 10%;
    display: flex;
    justify-content: center;
}

.timeline-year-dot::before {
    content: '';
    width: 16px;
    height: 16px;
    background: var(--accent-orange);
    border-radius: var(--radius-full);
}

.timeline-year-value {
    font-family: var(--font-mono);
    font-size: 24px;
    font-weight: 700;
    color: var(--accent-orange);
    margin-bottom: 8px;
}

.timeline-year-desc {
    font-size: 14px;
    color: var(--text-secondary);
}

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

.contact-info {
    padding: 32px;
    background: var(--card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--card-shadow);
}

.contact-info-item {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

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

.contact-info-icon {
    width: 40px;
    height: 40px;
    background: var(--light-gray);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.contact-info-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.contact-info-value {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 500;
}

.contact-map {
    height: 300px;
    background: var(--light-gray);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-on-scroll {
    opacity: 0;
}

.animate-on-scroll.animated {
    animation: fadeInUp 0.5s ease-out forwards;
}

/* Counter Animation */
@keyframes countUp {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1199px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .hero-panel {
        max-width: 500px;
    }
    
    .team-credentials {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .cta-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-timeline::before {
        left: 20px;
    }
    
    .timeline-year,
    .timeline-year:nth-child(even) {
        flex-direction: row;
    }
    
    .timeline-year-content {
        width: auto;
        flex: 1;
    }
    
    .timeline-year-dot {
        width: 40px;
        flex-shrink: 0;
    }
}

@media (max-width: 767px) {
    h1, .hero-title { font-size: 32px; }
    h2, .section-title { font-size: 28px; }
    .page-title { font-size: 32px; }
    
    .navbar-nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--canvas-bg);
        border-bottom: 1px solid var(--border-color);
        padding: 16px;
    }
    
    .navbar-nav.active {
        display: flex;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .navbar-cta .btn-secondary {
        display: none;
    }
    
    .hero {
        padding-top: 100px;
        padding-bottom: 48px;
    }
    
    .data-cards {
        grid-template-columns: 1fr;
    }
    
    .flow-chart {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .flow-arrow {
        display: none;
    }
    
    .matrix-table {
        display: block;
        overflow-x: auto;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .trust-stats {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .timeline {
        padding-left: 24px;
    }
    
    .timeline::before {
        left: 5px;
    }
    
    .timeline-dot {
        left: -23px;
    }
}