:root {
    --primary-color: #3b82f6;
    --primary-light: #60a5fa;
    --primary-dark: #2563eb;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --border-color: #e2e8f0;
    --nav-shadow: rgba(0,0,0,0.08);
    --card-shadow: rgba(0,0,0,0.06);
    --card-shadow-hover: rgba(0,0,0,0.12);
    --header-bg: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 50%, var(--primary-light) 100%);
    --transition-speed: 0.3s;
}

@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #f1f5f9;
        --text-secondary: #94a3b8;
        --text-light: #64748b;
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-tertiary: #334155;
        --border-color: #334155;
        --nav-shadow: rgba(0,0,0,0.3);
        --card-shadow: rgba(0,0,0,0.3);
        --card-shadow-hover: rgba(0,0,0,0.5);
    }
}

[data-theme="dark"] {
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-light: #64748b;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --border-color: #334155;
    --nav-shadow: rgba(0,0,0,0.3);
    --card-shadow: rgba(0,0,0,0.3);
    --card-shadow-hover: rgba(0,0,0,0.5);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-secondary);
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Scroll Progress */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-light), var(--primary-color), var(--primary-dark));
    z-index: 1001;
    transition: width 0.1s linear;
}

/* Dark Mode Toggle */
.dark-mode-toggle {
    position: fixed;
    bottom: 90px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.1);
    transition: all var(--transition-speed);
    z-index: 999;
}

.dark-mode-toggle:hover {
    transform: scale(1.1);
}

.dark-mode-toggle svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

/* Header */
header {
    background: var(--header-bg);
    padding: 80px 0 100px;
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

header .container {
    position: relative;
    z-index: 1;
    text-align: center;
}

.logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 100px;
    background: white;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    margin-bottom: 30px;
    animation: float 3s ease-in-out infinite;
    overflow: hidden;
}

.logo img {
    width: 80px;
    height: 80px;
    object-fit: contain;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

header h1 {
    font-size: 3.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
    text-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

header .subtitle {
    font-size: 1.25rem;
    color: rgba(255,255,255,0.9);
    max-width: 600px;
    margin: 0 auto 12px;
}

.version-badge {
    display: inline-block;
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(10px);
    padding: 8px 20px;
    border-radius: 50px;
    color: white;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid rgba(255,255,255,0.3);
}

.header-qrcode {
    margin: 20px auto;
    text-align: center;
}

.header-qrcode img {
    width: 120px;
    height: 120px;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.2);
    background: white;
    padding: 8px;
}

/* Navigation */
nav {
    background: var(--bg-primary);
    box-shadow: 0 4px 20px var(--nav-shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: box-shadow var(--transition-speed), background-color var(--transition-speed);
}

nav.scrolled {
    box-shadow: 0 4px 30px var(--card-shadow-hover);
}

nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    gap: 8px;
    padding: 16px 0;
    flex-wrap: wrap;
}

nav a {
    text-decoration: none;
    color: var(--text-secondary);
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 500;
    transition: all var(--transition-speed);
}

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

/* Sections */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-light), var(--primary-dark));
    border-radius: 2px;
}

.section-title p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--bg-primary);
    border-radius: 20px;
    padding: 32px;
    box-shadow: 0 4px 20px var(--card-shadow);
    transition: all var(--transition-speed);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.feature-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-light), var(--primary-dark));
    opacity: 0;
    transition: opacity var(--transition-speed);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px var(--card-shadow-hover);
}

.feature-card:hover::after {
    opacity: 1;
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 30px;
    height: 30px;
    fill: white;
}

.feature-card h3 {
    font-size: 1.4rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-card ul {
    list-style: none;
}

.feature-card li {
    padding: 8px 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-card li::before {
    content: '\2713';
    color: var(--success-color);
    font-weight: bold;
}

/* Highlights */
.highlight-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.highlight-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 4px 20px var(--card-shadow);
    transition: all var(--transition-speed);
}

.highlight-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px var(--card-shadow-hover);
}

.highlight-card h3 {
    font-size: 1.3rem;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
}

.highlight-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.75;
}

/* Steps */
.steps-container {
    max-width: 900px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: 30px;
    margin-bottom: 50px;
    position: relative;
}

.step:not(:last-child)::before {
    content: '';
    position: absolute;
    left: 35px;
    top: 70px;
    bottom: -50px;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary-color), var(--primary-light));
}

.step-number {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
}

.step-content {
    flex: 1;
    background: var(--bg-primary);
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 4px 20px var(--card-shadow);
}

.step-content h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.step-content p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.step-content ol {
    padding-left: 20px;
    color: var(--text-secondary);
}

.step-content li {
    padding: 6px 0;
}

/* Experience - Phone Mockup */
.experience-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.experience-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.experience-phone {
    flex-shrink: 0;
}

.phone-frame {
    width: 260px;
    height: 540px;
    background: #1e293b;
    border-radius: 36px;
    padding: 12px;
    position: relative;
    box-shadow: 0 16px 48px rgba(0,0,0,0.18);
    transition: all var(--transition-speed);
}

@media (prefers-color-scheme: dark) {
    .phone-frame {
        background: #334155;
        box-shadow: 0 16px 48px rgba(0,0,0,0.4);
    }
}

[data-theme="dark"] .phone-frame {
    background: #334155;
    box-shadow: 0 16px 48px rgba(0,0,0,0.4);
}

.experience-card:hover .phone-frame {
    transform: translateY(-8px);
    box-shadow: 0 24px 60px rgba(0,0,0,0.25);
}

.phone-dynamic-island {
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 28px;
    background: #000;
    border-radius: 14px;
    z-index: 2;
}

.phone-screen {
    width: 100%;
    height: 100%;
    border-radius: 28px;
    overflow: hidden;
    background: #000;
}

.phone-screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
}

.experience-card:hover .phone-screen img {
    transform: scale(1.05);
}

.phone-home-indicator {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 4px;
    background: rgba(255,255,255,0.3);
    border-radius: 2px;
    z-index: 2;
}

.experience-text {
    text-align: center;
    width: 100%;
}

.experience-quote {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.experience-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.7;
}

.experience-slogan {
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
    padding-left: 0;
    border-left: none;
}

.experience-slogan-sub {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-color);
    line-height: 1.7;
    padding: 10px 16px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(37, 99, 235, 0.05));
    border-radius: 8px;
}

/* Testimonials */
.testimonials-section {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, #eef2ff 100%);
    position: relative;
    overflow: hidden;
}

.testimonials-section::before {
    content: '';
    position: absolute;
    top: -60px;
    left: -60px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.06), transparent 70%);
    pointer-events: none;
}

.testimonials-section::after {
    content: '';
    position: absolute;
    bottom: -80px;
    right: -80px;
    width: 250px;
    height: 250px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.05), transparent 70%);
    pointer-events: none;
}

@media (prefers-color-scheme: dark) {
    .testimonials-section {
        background: linear-gradient(135deg, var(--bg-secondary) 0%, #1a1a2e 100%);
    }

    .testimonials-section::before {
        background: radial-gradient(circle, rgba(59, 130, 246, 0.1), transparent 70%);
    }

    .testimonials-section::after {
        background: radial-gradient(circle, rgba(99, 102, 241, 0.08), transparent 70%);
    }
}

[data-theme="dark"] .testimonials-section {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, #1a1a2e 100%);
}

[data-theme="dark"] .testimonials-section::before {
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1), transparent 70%);
}

[data-theme="dark"] .testimonials-section::after {
    background: radial-gradient(circle, rgba(99, 102, 241, 0.08), transparent 70%);
}

.testimonials-grid {
    overflow: hidden;
    padding: 8px 0 20px;
    max-width: 1100px;
    margin: 0 auto;
    mask-image: linear-gradient(90deg, transparent 0%, #000 4%, #000 96%, transparent 100%);
    -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 4%, #000 96%, transparent 100%);
}

.testimonials-track {
    display: flex;
    gap: 20px;
    width: fit-content;
    animation: testimonial-scroll 40s linear infinite;
}

.testimonials-track:hover {
    animation-play-state: paused;
}

@keyframes testimonial-scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.testimonial-card {
    flex: 0 0 320px;
    min-width: 280px;
    background: var(--bg-primary);
    border-radius: 20px;
    padding: 32px 24px 24px;
    box-shadow: 0 4px 20px var(--card-shadow);
    transition: all var(--transition-speed);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
}

.testimonial-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 20%;
    right: 20%;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--primary-light), transparent);
    border-radius: 2px;
    opacity: 0;
    transition: opacity var(--transition-speed);
}

.testimonial-card:hover::after {
    opacity: 1;
}

.testimonial-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px var(--card-shadow-hover);
}

.testimonial-icon {
    font-size: 2rem;
    margin-bottom: 16px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(99, 102, 241, 0.05));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.testimonial-card blockquote {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
    flex: 1;
    font-style: normal;
    position: relative;
}

.testimonial-card blockquote::before {
    content: '\201C';
    font-size: 2.5rem;
    line-height: 1;
    color: var(--primary-light);
    opacity: 0.25;
    display: block;
    margin-bottom: -4px;
    font-family: Georgia, serif;
}

.testimonial-footer {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
    width: 100%;
}

.testimonial-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.testimonial-tag {
    font-size: 0.75rem;
    color: var(--primary-color);
    background: rgba(59, 130, 246, 0.1);
    padding: 3px 12px;
    border-radius: 50px;
    font-weight: 500;
}

/* Tech Stack */
.tech-stack {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
    margin-top: 40px;
}

.tech-item {
    text-align: center;
    padding: 30px;
    background: var(--bg-primary);
    border-radius: 20px;
    box-shadow: 0 4px 20px var(--card-shadow);
    min-width: 180px;
}

.tech-item h4 {
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: 16px;
}

.tech-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Color Table */
.color-table {
    background: var(--bg-primary);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 20px var(--card-shadow);
    max-width: 800px;
    margin: 0 auto;
}

.color-table table {
    width: 100%;
    border-collapse: collapse;
}

.color-table th,
.color-table td {
    padding: 16px 24px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.color-table th {
    background: var(--bg-tertiary);
    font-weight: 600;
    color: var(--text-primary);
}

.color-swatch {
    display: inline-block;
    width: 24px;
    height: 24px;
    border-radius: 6px;
    vertical-align: middle;
    margin-right: 10px;
    border: 1px solid rgba(0,0,0,0.1);
}

.color-var {
    font-family: monospace;
    background: var(--bg-tertiary);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.85rem;
}

/* Footer */
footer {
    background: #0f172a;
    color: white;
    padding: 60px 0 30px;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-light), var(--primary-color), var(--primary-dark));
}

/* Footer Tech Stack */
.footer-tech {
    margin: 40px auto;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    max-width: 600px;
}

.footer-tech h4 {
    color: rgba(255,255,255,0.5);
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.footer-tech-tags {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.footer-tech-tags span {
    display: inline-block;
    padding: 5px 14px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: 6px;
    color: rgba(255,255,255,0.65);
    font-size: 0.78rem;
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    transition: all var(--transition-speed);
    letter-spacing: 0.3px;
}

.footer-tech-tags span:hover {
    background: rgba(255,255,255,0.15);
    color: white;
    transform: translateY(-2px);
    border-color: rgba(255,255,255,0.15);
}

footer .container {
    text-align: center;
}

.footer-qrcode {
    margin: 30px 0;
    text-align: center;
}

.footer-qrcode-items {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.footer-qrcode-item {
    text-align: center;
    min-width: 100px;
}

.footer-qrcode-item img {
    width: 100px;
    height: 100px;
    border-radius: 8px;
    background: white;
    padding: 6px;
    transition: transform var(--transition-speed);
}

.footer-qrcode-item img:hover {
    transform: scale(1.05);
}

.footer-qrcode-item p {
    color: rgba(255,255,255,0.85);
    font-size: 0.85rem;
    margin-top: 10px;
    font-weight: 500;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: color var(--transition-speed);
}

.footer-links a:hover {
    color: white;
}

.copyright {
    color: rgba(255,255,255,0.5);
    font-size: 0.9rem;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--bg-primary);
    color: var(--primary-color);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
    transition: all var(--transition-speed) ease;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.5);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

.back-to-top-ring {
    position: absolute;
    top: -2px;
    left: -2px;
    width: 54px;
    height: 54px;
    transform: rotate(-90deg);
    pointer-events: none;
}

.back-to-top-ring circle {
    fill: none;
    stroke: var(--primary-color);
    stroke-width: 2;
    stroke-dasharray: 157;
    stroke-dashoffset: 157;
    transition: stroke-dashoffset 0.1s linear;
}

/* Focus & Accessibility */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 2.5rem;
    }

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

    .step {
        flex-direction: column;
    }

    .step:not(:last-child)::before {
        display: none;
    }

    nav ul {
        gap: 4px;
    }

    nav a {
        padding: 8px 12px;
        font-size: 0.9rem;
    }

    .experience-grid {
        grid-template-columns: 1fr;
        gap: 60px;
    }

    .phone-frame {
        width: 220px;
        height: 460px;
        border-radius: 30px;
        padding: 10px;
    }

    .phone-screen {
        border-radius: 22px;
    }

    .phone-dynamic-island {
        width: 100px;
        height: 24px;
        top: 14px;
    }

    .experience-quote {
        font-size: 1.05rem;
    }

    .testimonials-grid {
        padding: 8px 0 16px;
    }

    .testimonials-track {
        gap: 16px;
    }

    .testimonial-card {
        flex: 0 0 270px;
        min-width: 240px;
        padding: 24px 20px 20px;
    }

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

    .highlight-card {
        padding: 24px;
    }

    .dark-mode-toggle {
        bottom: 90px;
        right: 16px;
        width: 40px;
        height: 40px;
    }

    .back-to-top {
        bottom: 30px;
        right: 16px;
        width: 44px;
        height: 44px;
    }

    .back-to-top-ring {
        width: 48px;
        height: 48px;
    }

    .section-title h2 {
        font-size: 2rem;
    }
}