:root {
    --primary: #7c3aed;
    --primary-light: #a78bfa;
    --secondary: #06b6d4;
    --accent: #f59e0b;
    --bg: #09090b;
    --bg-card: #18181b;
    --bg-card-hover: #27272a;
    --text: #fafafa;
    --text-muted: #a1a1aa;
    --text-dim: #71717a;
    --border: #27272a;
    --gradient-1: linear-gradient(135deg, #7c3aed 0%, #06b6d4 100%);
    --gradient-2: linear-gradient(135deg, #f59e0b 0%, #ec4899 100%);
    --shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --radius: 16px;
    --radius-sm: 10px;
    --side-width: 72px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
}

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

a {
    color: var(--secondary);
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: var(--primary-light);
}

h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
}

.side-nav {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--side-width);
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px 0;
    z-index: 1000;
}

.side-logo {
    margin-bottom: 40px;
}

.side-logo img {
    border-radius: 12px;
}

.side-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.side-links a {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all 0.3s;
}

.side-links a .dot {
    width: 8px;
    height: 8px;
    background: var(--text-dim);
    border-radius: 50%;
    transition: all 0.3s;
}

.side-links a:hover .dot,
.side-links a.active .dot {
    background: var(--primary);
    box-shadow: 0 0 12px var(--primary);
}

.side-links a.active {
    background: rgba(124, 58, 237, 0.15);
}

.side-links a::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 60px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 0.85rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transform: translateX(-10px);
    transition: all 0.3s;
}

.side-links a:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.side-chat {
    width: 44px;
    height: 44px;
    background: var(--gradient-1);
    border: none;
    border-radius: 12px;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    position: relative;
}

.side-chat:hover {
    transform: scale(1.1);
    box-shadow: 0 0 20px rgba(124, 58, 237, 0.5);
}

.side-chat::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 60px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 0.85rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transform: translateX(-10px);
    transition: all 0.3s;
}

.side-chat:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.top-bar {
    position: fixed;
    top: 0;
    left: var(--side-width);
    right: 0;
    height: 64px;
    background: rgba(9, 9, 11, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 999;
    display: flex;
    align-items: center;
}

.top-bar-inner {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text);
}

.top-nav {
    display: flex;
    gap: 32px;
}

.top-nav a {
    color: var(--text-muted);
    font-size: 0.95rem;
    transition: color 0.3s;
}

.top-nav a:hover {
    color: var(--text);
}

.btn-contact {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px 20px;
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-contact:hover {
    border-color: var(--primary);
    color: var(--primary-light);
}

.mobile-toggle {
    display: none;
    width: 40px;
    height: 40px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    position: relative;
}

.mobile-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--text);
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.mobile-toggle span::before,
.mobile-toggle span::after {
    content: "";
    position: absolute;
    width: 18px;
    height: 2px;
    background: var(--text);
    left: 0;
}

.mobile-toggle span::before { top: -6px; }
.mobile-toggle span::after { top: 6px; }

.main-content {
    margin-left: var(--side-width);
    min-height: 100vh;
}

.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 100px 40px 60px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.gradient-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
}

.blob-1 {
    width: 600px;
    height: 600px;
    background: var(--primary);
    top: -200px;
    right: -100px;
    animation: blob-move 15s ease-in-out infinite;
}

.blob-2 {
    width: 400px;
    height: 400px;
    background: var(--secondary);
    bottom: -100px;
    left: 10%;
    animation: blob-move 20s ease-in-out infinite reverse;
}

@keyframes blob-move {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

.hero-wrapper {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-left {
    max-width: 560px;
}

.hero-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(124, 58, 237, 0.2);
    border: 1px solid rgba(124, 58, 237, 0.3);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--primary-light);
    margin-bottom: 24px;
}

.hero-left h1 {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 800;
    line-height: 1;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--text) 0%, var(--text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-slogan {
    font-size: 1.5rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.hero-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.meta-item {
    font-size: 0.95rem;
    color: var(--text-dim);
}

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

.btn-main {
    background: var(--gradient-1);
    color: white;
    border: none;
    padding: 16px 32px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-main:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(124, 58, 237, 0.4);
}

.btn-main.btn-lg {
    padding: 18px 40px;
    font-size: 1.1rem;
}

.btn-alt {
    color: var(--text-muted);
    padding: 16px 24px;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    transition: color 0.3s;
}

.btn-alt:hover {
    color: var(--text);
}

.hero-right {
    position: relative;
    height: 500px;
}

.hero-card {
    position: absolute;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.card-main {
    width: 320px;
    height: 400px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: var(--shadow);
}

.card-main img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-float {
    padding: 16px 24px;
    text-align: center;
    animation: float 4s ease-in-out infinite;
}

.card-float .num {
    display: block;
    font-size: 1.75rem;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.card-float .label {
    font-size: 0.85rem;
    color: var(--text-dim);
}

.card-1 {
    top: 10%;
    left: 0;
    animation-delay: 0s;
}

.card-2 {
    bottom: 15%;
    right: 5%;
    animation-delay: 1s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-dim);
    font-size: 0.85rem;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--text-dim), transparent);
    animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
    0%, 100% { opacity: 1; height: 40px; }
    50% { opacity: 0.5; height: 30px; }
}

.bento-section,
.features-section,
.security-section {
    padding: 100px 40px;
    max-width: 1400px;
    margin: 0 auto;
}

.download-section,
.guide-section,
.faq-section {
    padding: 100px 40px;
    background: var(--bg-card);
}

.download-section .section-title,
.guide-section .section-title,
.faq-section .section-title {
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.section-title {
    margin-bottom: 50px;
}

.title-num {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--primary-light);
    background: rgba(124, 58, 237, 0.15);
    padding: 4px 12px;
    border-radius: 50px;
    margin-bottom: 16px;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.section-title p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.bento-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    grid-template-rows: auto auto;
    gap: 20px;
}

.bento-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: all 0.3s;
}

.bento-item:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
}

.item-large {
    grid-row: span 2;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.item-large .bento-content h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: var(--primary-light);
}

.item-large .bento-content p {
    color: var(--text-muted);
    line-height: 1.8;
}

.bento-img img {
    border-radius: var(--radius-sm);
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.item-tall {
    grid-column: 2;
}

.item-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.bento-item h4 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: var(--text);
}

.bento-item > p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 0;
}

.download-scroll {
    overflow-x: auto;
    margin: 0 -40px;
    padding: 0 40px 20px;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.download-scroll::-webkit-scrollbar {
    height: 6px;
}

.download-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.download-scroll::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

.download-track {
    display: flex;
    gap: 24px;
    min-width: max-content;
}

.download-card {
    width: 320px;
    flex-shrink: 0;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    position: relative;
    transition: all 0.3s;
}

.download-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
}

.download-card.featured {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.1) 0%, rgba(6, 182, 212, 0.05) 100%);
}

.featured-ribbon {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--gradient-2);
    color: white;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.platform-icon {
    font-size: 2rem;
}

.platform-badge {
    font-size: 0.8rem;
    color: var(--text-dim);
    background: var(--bg-card);
    padding: 4px 10px;
    border-radius: 6px;
}

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

.download-card > p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 20px;
    line-height: 1.6;
}

.card-features {
    list-style: none;
    margin-bottom: 24px;
}

.card-features li {
    color: var(--text-muted);
    font-size: 0.9rem;
    padding: 6px 0;
    border-bottom: 1px solid var(--border);
}

.card-features li:last-child {
    border-bottom: none;
}

.btn-download {
    width: 100%;
    padding: 14px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-download:hover {
    border-color: var(--primary);
    color: var(--primary-light);
}

.btn-download.primary {
    background: var(--gradient-1);
    border: none;
}

.btn-download.primary:hover {
    box-shadow: 0 8px 30px rgba(124, 58, 237, 0.4);
}

.card-info {
    background: linear-gradient(135deg, var(--bg) 0%, var(--bg-card) 100%);
}

.card-info h3 {
    color: var(--primary-light);
}

.version-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.version-list span {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--text-dim);
}

.features-showcase {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
    align-items: start;
}

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

.feature-visual img {
    width: 100%;
    height: 280px;
    object-fit: cover;
}

.feature-info {
    padding: 28px;
}

.feature-tag {
    display: inline-block;
    background: var(--gradient-1);
    color: white;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.feature-info h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.feature-info p {
    color: var(--text-muted);
    line-height: 1.7;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.feature-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    transition: all 0.3s;
}

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

.feature-num {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    flex-shrink: 0;
}

.feature-text h4 {
    margin-bottom: 8px;
}

.feature-text p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 0;
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 24px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
}

.timeline-item {
    display: flex;
    gap: 30px;
    margin-bottom: 30px;
    position: relative;
}

.timeline-marker {
    width: 50px;
    height: 50px;
    background: var(--bg);
    border: 2px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.timeline-marker span {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-light);
}

.timeline-content {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    flex: 1;
    transition: all 0.3s;
}

.timeline-content:hover {
    border-color: var(--primary);
}

.timeline-content h3 {
    margin-bottom: 10px;
    color: var(--text);
}

.timeline-content p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 0;
}

.guide-cta {
    text-align: center;
    margin-top: 50px;
}

.security-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto auto;
    gap: 20px;
}

.security-hero {
    grid-column: span 2;
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    height: 260px;
}

.security-hero img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.security-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.9) 0%, rgba(6, 182, 212, 0.7) 100%);
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 40px;
}

.security-overlay h3 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.security-overlay p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
}

.security-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: all 0.3s;
}

.security-card:hover {
    border-color: var(--primary);
}

.security-card h4 {
    margin-bottom: 12px;
    color: var(--primary-light);
}

.security-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0;
}

.risk-notice {
    grid-column: span 2;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(236, 72, 153, 0.05) 100%);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: var(--radius);
    padding: 20px 24px;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.risk-notice strong {
    color: var(--accent);
}

.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-tabs {
    display: flex;
    gap: 12px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.tab-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 10px 24px;
    border-radius: 50px;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s;
}

.tab-btn:hover {
    border-color: var(--primary);
    color: var(--text);
}

.tab-btn.active {
    background: var(--gradient-1);
    border-color: transparent;
    color: white;
}

.faq-panel {
    display: none;
}

.faq-panel.active {
    display: block;
}

.faq-item {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 16px;
    overflow: hidden;
}

.faq-q {
    padding: 20px 24px;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    transition: background 0.3s;
}

.faq-q:hover {
    background: var(--bg-card-hover);
}

.faq-a {
    padding: 0 24px 20px;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
    border-top: 1px solid var(--border);
}

.faq-more {
    text-align: center;
    margin-top: 40px;
}

.contact-section {
    padding: 80px 40px;
    max-width: 1400px;
    margin: 0 auto;
}

.contact-box {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.15) 0%, rgba(6, 182, 212, 0.1) 100%);
    border: 1px solid var(--primary);
    border-radius: var(--radius);
    padding: 60px;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 40px;
    align-items: center;
}

.contact-info h2 {
    font-size: 2rem;
    margin-bottom: 16px;
}

.contact-info p {
    color: var(--text-muted);
    margin-bottom: 24px;
    max-width: 500px;
}

.contact-features {
    display: flex;
    gap: 20px;
    margin-bottom: 28px;
    flex-wrap: wrap;
}

.contact-features span {
    color: var(--secondary);
    font-size: 0.95rem;
}

.contact-visual img {
    width: 200px;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius);
}

.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 40px;
}

.footer-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    font-weight: 700;
}

.footer-brand img {
    border-radius: 8px;
}

.footer-links {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;
}

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

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

.footer-copy {
    color: var(--text-dim);
    font-size: 0.85rem;
}

.mobile-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 12px 0;
    z-index: 1000;
}

.mobile-nav a {
    flex: 1;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    padding: 8px;
}

.mobile-nav a:hover {
    color: var(--primary-light);
}

@media (max-width: 1024px) {
    :root {
        --side-width: 0px;
    }

    .side-nav {
        display: none;
    }

    .top-bar {
        left: 0;
    }

    .top-nav {
        display: none;
    }

    .mobile-toggle {
        display: block;
    }

    .hero-wrapper {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-right {
        display: none;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-meta {
        justify-content: center;
    }

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

    .item-large {
        grid-row: auto;
    }

    .item-tall {
        grid-column: auto;
    }

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

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

    .security-hero {
        grid-column: auto;
    }

    .risk-notice {
        grid-column: auto;
    }

    .contact-box {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 40px;
    }

    .contact-visual {
        display: none;
    }

    .contact-features {
        justify-content: center;
    }

    .mobile-nav {
        display: flex;
    }

    .main-content {
        padding-bottom: 70px;
    }
}

@media (max-width: 768px) {
    .hero-section {
        padding: 80px 20px 60px;
        min-height: auto;
    }

    .hero-left h1 {
        font-size: 2.5rem;
    }

    .hero-slogan {
        font-size: 1.2rem;
    }

    .bento-section,
    .features-section,
    .security-section,
    .contact-section {
        padding: 60px 20px;
    }

    .download-section,
    .guide-section,
    .faq-section {
        padding: 60px 20px;
    }

    .download-scroll {
        margin: 0 -20px;
        padding: 0 20px 20px;
    }

    .section-title h2 {
        font-size: 1.75rem;
    }

    .bento-item {
        padding: 20px;
    }

    .download-card {
        width: 280px;
        padding: 24px;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-marker {
        width: 42px;
        height: 42px;
    }

    .timeline-content {
        padding: 20px;
    }

    .security-overlay {
        padding: 24px;
    }

    .security-overlay h3 {
        font-size: 1.5rem;
    }

    .contact-box {
        padding: 30px 20px;
    }

    .footer {
        padding: 30px 20px;
    }

    .scroll-hint {
        display: none;
    }
}

@media (max-width: 480px) {
    .top-bar-inner {
        padding: 0 16px;
    }

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

    .hero-meta {
        flex-direction: column;
        gap: 8px;
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .hero-cta .btn-main,
    .hero-cta .btn-alt {
        width: 100%;
        justify-content: center;
    }

    .faq-tabs {
        flex-direction: column;
    }

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

    .contact-features {
        flex-direction: column;
        gap: 8px;
    }
}