:root {
    --primary-color: #2563eb;
    --dark-blue: #1e3a8a;
    --light-blue: #f0f8ff;
    --accent-green: #10b981;
    --accent-orange: #f97316;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --border-color: #e5e7eb;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --container: 1180px;
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --radius: 8px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    font-size: 16px;
}

.container {
    width: min(100% - 32px, var(--container));
    margin-inline: auto;
}

/* Global Image Styles */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

.image-box,
.route-media,
.scene-media,
.preview-media {
    overflow: visible;
    line-height: 0;
    padding: 0;
}

.image-box img,
.route-media img,
.scene-media img,
.preview-media img {
    max-width: 100%;
    height: auto;
    object-fit: contain;
}

/* Buttons */
.btn {
    padding: 12px 32px;
    border: none;
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary:hover {
    background-color: var(--dark-blue);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
}

.header-btn {
    padding: 8px 16px;
    background-color: transparent;
    color: var(--text-dark);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.header-btn:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.header-btn-secondary {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
    transition: all 0.3s ease;
}

.header.scrolled {
    padding: 8px 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    gap: var(--spacing-md);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: fit-content;
}

.logo {
    width: 32px;
    height: 32px;
}

.brand-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
}

.header-middle {
    flex: 1;
    text-align: center;
    min-width: 0;
}

.header-desc {
    font-size: 14px;
    color: var(--text-light);
}

.header-right {
    display: flex;
    gap: 12px;
    min-width: fit-content;
}

.progress-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background-color: var(--primary-color);
    width: 0%;
    transition: width 0.3s ease;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-dark);
}

.mobile-route-menu {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 200;
}

.mobile-route-overlay {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    top: 0;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mobile-route-panel {
    position: relative;
    background-color: var(--bg-white);
    max-height: 80vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

.mobile-route-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.mobile-route-header h3 {
    font-size: 18px;
}

.mobile-route-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-dark);
}

.mobile-route-nav {
    display: flex;
    flex-direction: column;
}

.mobile-route-link {
    padding: var(--spacing-md);
    text-decoration: none;
    color: var(--text-dark);
    border-bottom: 1px solid var(--border-color);
    display: block;
    transition: background-color 0.3s ease;
}

.mobile-route-link:hover {
    background-color: var(--light-blue);
}

/* Hero Section */
body {
    padding-top: 70px;
}

.hero {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--bg-white) 100%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    align-items: center;
}

.hero-tag {
    display: inline-block;
    padding: 6px 12px;
    background-color: var(--light-blue);
    color: var(--primary-color);
    border-radius: var(--radius);
    font-size: 12px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 42px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}

h2 {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-lg);
    color: var(--text-dark);
}

h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-dark);
}

.hero-desc {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.hero-warning {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: #fef3c7;
    border-left: 4px solid var(--accent-orange);
    border-radius: var(--radius);
}

.warning-icon {
    font-size: 20px;
    flex-shrink: 0;
}

.hero-warning p {
    font-size: 14px;
    color: #92400e;
}

.hero-card {
    position: relative;
}

.hero-image {
    margin-bottom: var(--spacing-md);
}

.route-image {
    width: 100%;
}

.hero-route-tags {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.route-tag {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: var(--bg-white);
}

.route-tag:hover {
    border-color: var(--primary-color);
    background-color: var(--light-blue);
}

.route-tag.active {
    border-color: var(--primary-color);
    background-color: var(--light-blue);
}

.route-number {
    display: block;
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.route-name {
    display: block;
    font-size: 14px;
    color: var(--text-dark);
}

.hero-summary {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.summary-item {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--bg-white);
    cursor: pointer;
    transition: all 0.3s ease;
}

.summary-item:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
}

.summary-number {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.summary-content h4 {
    margin-bottom: var(--spacing-xs);
}

.summary-content p {
    font-size: 14px;
    color: var(--text-light);
}

/* Module Sections */
.module {
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--border-color);
}

.module:nth-child(even) {
    background-color: var(--bg-light);
}

/* Assets Module */
.assets-panel {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--spacing-xl);
}

.assets-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.step-item {
    padding: var(--spacing-md);
    border-left: 3px solid var(--border-color);
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: var(--bg-white);
    border-radius: 0 var(--radius) var(--radius) 0;
}

.step-item:hover,
.step-item.active {
    border-left-color: var(--primary-color);
    background-color: var(--light-blue);
}

.step-number {
    display: inline-block;
    width: 24px;
    height: 24px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 24px;
    font-size: 12px;
    font-weight: 700;
    margin-right: 8px;
}

.step-title {
    font-size: 14px;
    font-weight: 500;
}

.step-content {
    display: none;
}

.step-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.content-notes {
    list-style: none;
    margin: var(--spacing-md) 0;
    font-size: 14px;
    color: var(--text-light);
}

.content-notes li {
    padding: var(--spacing-xs) 0;
    padding-left: 20px;
    position: relative;
}

.content-notes li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-weight: 700;
}

.step-image {
    margin-top: var(--spacing-lg);
}

/* Account Module */
.account-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    align-items: start;
}

.account-left {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.account-layer {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--bg-white);
    cursor: pointer;
    transition: all 0.3s ease;
}

.account-layer:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
}

.account-layer.active {
    border-color: var(--primary-color);
    background-color: var(--light-blue);
}

.layer-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.layer-tag {
    font-size: 12px;
    font-weight: 700;
    color: var(--primary-color);
    background-color: var(--light-blue);
    padding: 4px 8px;
    border-radius: var(--radius);
}

.layer-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
}

.account-layer p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
}

.layer-status {
    display: flex;
    gap: var(--spacing-sm);
}

.status-badge {
    display: inline-block;
    padding: 4px 8px;
    background-color: var(--light-blue);
    color: var(--primary-color);
    border-radius: var(--radius);
    font-size: 12px;
    font-weight: 500;
}

.account-details {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.detail-item {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--bg-white);
    display: none;
}

.detail-item.active {
    display: block;
}

.detail-item h4 {
    margin-bottom: var(--spacing-sm);
}

.detail-item p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-light);
}

/* Scenario Module */
.scenario-panel {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.scenario-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.scenario-item {
    padding: var(--spacing-md);
    border-left: 3px solid var(--border-color);
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: var(--bg-white);
    border-radius: 0 var(--radius) var(--radius) 0;
    font-size: 14px;
    color: var(--text-dark);
    text-align: center;
}

.scenario-item:hover,
.scenario-item.active {
    border-left-color: var(--primary-color);
    background-color: var(--light-blue);
}

.scenario-content {
}

.scenario-detail {
    display: none;
}

.scenario-detail.active {
    display: block;
}

.content-tips {
    list-style: none;
    margin: var(--spacing-md) 0;
    font-size: 14px;
    color: var(--text-light);
}

.content-tips li {
    padding: var(--spacing-xs) 0;
    padding-left: 20px;
    position: relative;
}

.content-tips li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

.scenario-image {
    margin-top: var(--spacing-lg);
}

/* Network Module */
.network-verification {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.verification-item {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--bg-white);
    cursor: pointer;
    transition: all 0.3s ease;
}

.verification-item:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
}

.verify-number {
    display: inline-block;
    width: 32px;
    height: 32px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 32px;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.verify-content h3 {
    margin-bottom: var(--spacing-xs);
}

.verify-content p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
}

.verify-tag {
    display: inline-block;
    padding: 4px 8px;
    background-color: #fee2e2;
    color: #991b1b;
    border-radius: var(--radius);
    font-size: 12px;
    font-weight: 500;
}

.network-image {
    margin-bottom: var(--spacing-xl);
}

.verification-expand {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.expand-content {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--bg-white);
    display: none;
}

.expand-content.active {
    display: block;
}

.expand-content h4 {
    margin-bottom: var(--spacing-sm);
}

.expand-content p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-light);
}

.expand-content p + p {
    margin-top: var(--spacing-sm);
}

/* Security Module */
.security-panel {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.security-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.security-item {
    padding: var(--spacing-md);
    border-left: 3px solid var(--border-color);
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: var(--bg-white);
    border-radius: 0 var(--radius) var(--radius) 0;
    font-size: 14px;
    color: var(--text-dark);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
}

.security-item:hover,
.security-item.active {
    border-left-color: var(--accent-orange);
    background-color: #fef3c7;
}

.security-label {
    font-weight: 500;
}

.security-detail {
    display: none;
}

.security-detail.active {
    display: block;
}

.security-tips {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    background-color: var(--light-blue);
    border-radius: var(--radius);
    font-size: 14px;
}

.security-tips p {
    margin: var(--spacing-sm) 0;
    line-height: 1.6;
}

.security-tips p strong {
    color: var(--primary-color);
}

.security-image {
    margin-top: var(--spacing-lg);
}

/* Preview Module */
.preview-display {
    display: grid;
    grid-template-columns: 60px 1fr 300px;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    align-items: start;
}

.preview-index {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.index-item {
    width: 60px;
    height: 60px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: var(--bg-white);
}

.index-item:hover,
.index-item.active {
    border-color: var(--primary-color);
    background-color: var(--light-blue);
}

.index-number {
    font-size: 12px;
    font-weight: 700;
    color: var(--primary-color);
}

.preview-main {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-image {
    display: none;
    width: 100%;
}

.preview-image.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-media {
    cursor: pointer;
}

.preview-description {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.description {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--bg-white);
    display: none;
    font-size: 14px;
    line-height: 1.6;
}

.description.active {
    display: block;
}

.description h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.description p {
    color: var(--text-light);
}

.lightbox {
    display: none;
}

#previewLightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 300;
    display: none;
    align-items: center;
    justify-content: center;
}

#previewLightbox.active {
    display: flex;
}

.lightbox-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    cursor: pointer;
}

.lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.lightbox-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: none;
    border: none;
    color: white;
    font-size: 32px;
    cursor: pointer;
}

/* Scenarios Guide Module */
.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.scenario-card {
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--bg-white);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-sm);
}

.scenario-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
}

.scenario-card.active {
    background-color: var(--light-blue);
    border-color: var(--primary-color);
}

.scenario-icon {
    font-size: 32px;
}

.scenario-card h4 {
    font-size: 16px;
    margin: 0;
}

.scenario-card p {
    font-size: 13px;
    color: var(--text-light);
    margin: 0;
}

.scenarios-details {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.scenario-explanation {
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--bg-white);
    display: none;
}

.scenario-explanation.active {
    display: block;
}

.scenario-explanation h3 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.scenario-explanation p {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-light);
}

.scenario-explanation p + p {
    margin-top: var(--spacing-sm);
}

/* Checklist Module */
.checklist-container {
}

.checklist-items {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--bg-white);
    position: relative;
}

.checklist-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
    flex-shrink: 0;
}

.checklist-label {
    flex: 1;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.check-text {
    font-weight: 500;
    color: var(--text-dark);
}

.check-desc {
    font-size: 13px;
    color: var(--text-light);
}

.check-status {
    padding: 4px 8px;
    background-color: #fee2e2;
    color: #991b1b;
    border-radius: var(--radius);
    font-size: 12px;
    font-weight: 500;
    flex-shrink: 0;
}

.checklist-item input:checked ~ .checklist-label .check-text {
    color: var(--accent-green);
}

.checklist-item input:checked ~ .check-status {
    background-color: #d1fae5;
    color: #065f46;
}

.checklist-item input:checked ~ .check-status::before {
    content: "✓ ";
}

.checklist-item input:checked ~ .check-status::after {
    content: "已确认";
}

.checklist-result {
    padding: var(--spacing-xl);
    border: 2px solid var(--accent-green);
    border-radius: var(--radius);
    background-color: #f0fdf4;
    text-align: center;
}

.result-icon {
    display: inline-block;
    width: 48px;
    height: 48px;
    background-color: var(--accent-green);
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 48px;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.checklist-result h3 {
    color: var(--accent-green);
    margin-bottom: var(--spacing-sm);
}

.checklist-result p {
    color: var(--text-light);
    font-size: 14px;
}

/* FAQ Module */
.faq-categories {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.faq-category {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--bg-white);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    color: var(--text-dark);
    font-size: 15px;
}

.faq-category:hover,
.faq-category.active {
    border-color: var(--primary-color);
    background-color: var(--light-blue);
}

.faq-content {
}

.faq-group {
    display: none;
}

.faq-group.active {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

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

.faq-question {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--bg-white);
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-dark);
    text-align: left;
    transition: all 0.3s ease;
}

.faq-question:hover {
    background-color: var(--light-blue);
}

.faq-icon {
    flex-shrink: 0;
    font-size: 20px;
    transition: transform 0.3s ease;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    background-color: var(--bg-light);
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer p {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-light);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: all 0.3s ease;
    z-index: 50;
}

.back-to-top:hover {
    background-color: var(--dark-blue);
    transform: translateY(-2px);
}

.back-to-top.show {
    display: flex;
}

/* Footer */
.footer {
    background-color: var(--text-dark);
    color: white;
    padding: var(--spacing-xl) 0;
}

.footer-top {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo-section {
    display: flex;
    gap: var(--spacing-md);
}

.footer-logo {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
}

.footer-brand h3 {
    color: white;
    margin: 0 0 4px 0;
    font-size: 18px;
}

.footer-brand p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
}

.footer-nav {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.footer-section h4 {
    color: white;
    margin-bottom: var(--spacing-sm);
    font-size: 14px;
}

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

.footer-section li {
    margin-bottom: var(--spacing-xs);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.3s ease;
}

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

.footer-middle {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-warning h4 {
    color: white;
    margin-bottom: var(--spacing-sm);
    font-size: 14px;
}

.footer-warning p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.footer-bottom {
    text-align: center;
}

.footer-copyright {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-sm);
}

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

/* Mobile Responsive */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 32px;
        --spacing-lg: 24px;
    }

    body {
        padding-top: 60px;
    }

    .header-right {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .mobile-route-menu.active {
        display: flex;
    }

    .mobile-route-menu.active .mobile-route-overlay {
        opacity: 1;
    }

    .header-desc {
        display: none;
    }

    h1 {
        font-size: 32px;
    }

    h2 {
        font-size: 24px;
    }

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

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

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

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

    .assets-panel {
        grid-template-columns: 1fr;
    }

    .assets-steps {
        flex-direction: row;
        overflow-x: auto;
        gap: var(--spacing-md);
        padding-bottom: var(--spacing-md);
    }

    .step-item {
        min-width: 100px;
        flex-shrink: 0;
    }

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

    .account-details {
        grid-template-columns: 1fr;
    }

    .scenario-panel {
        grid-template-columns: 1fr;
    }

    .scenario-list {
        flex-direction: row;
        overflow-x: auto;
        gap: var(--spacing-md);
        padding-bottom: var(--spacing-md);
    }

    .scenario-item {
        min-width: 100px;
        flex-shrink: 0;
    }

    .network-verification {
        grid-template-columns: 1fr;
    }

    .verification-expand {
        grid-template-columns: 1fr;
    }

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

    .security-list {
        flex-direction: row;
        overflow-x: auto;
        gap: var(--spacing-md);
        padding-bottom: var(--spacing-md);
    }

    .security-item {
        min-width: 100px;
        flex-shrink: 0;
    }

    .preview-display {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .preview-index {
        flex-direction: row;
        overflow-x: auto;
        gap: var(--spacing-md);
        padding-bottom: var(--spacing-md);
    }

    .index-item {
        min-width: 60px;
        flex-shrink: 0;
    }

    .preview-description {
        order: -1;
    }

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

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

    .footer-top {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .footer-nav {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 24px;
    }

    h2 {
        font-size: 20px;
    }

    .container {
        width: min(100% - 16px, var(--container));
    }

    .hero-summary {
        grid-template-columns: 1fr;
    }

    .summary-item {
        padding: var(--spacing-sm);
    }

    .summary-number {
        font-size: 18px;
    }

    .summary-content h4 {
        font-size: 14px;
    }

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

    .faq-categories {
        grid-template-columns: 1fr;
    }

    .footer-nav {
        grid-template-columns: 1fr;
    }
}