/* Root Variables */
:root {
    --container: 1180px;
    --primary-color: #1e3a8a;
    --secondary-color: #3b82f6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --dark-bg: #0f172a;
    --light-bg: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text-primary);
    background-color: #fff;
    line-height: 1.6;
}

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

.image-box,
.archive-media,
.install-media,
.preview-media,
.local-img-frame {
    overflow: visible;
    line-height: 0;
    padding: 0;
}

.image-box img,
.archive-media img,
.install-media img,
.preview-media img,
.local-img-frame img {
    max-width: 100%;
    height: auto;
    object-fit: contain;
}

/* Container */
:root {
    --container: 1180px;
}

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

/* Progress Bar */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    width: 0%;
    z-index: 9999;
    transition: width 0.3s ease;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
    padding: 16px 0;
}

.header.compact {
    padding: 8px 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    padding: 0 16px;
    max-width: var(--container);
    margin: 0 auto;
}

.header-brand {
    flex-shrink: 0;
}

.brand-text {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
    letter-spacing: 1px;
}

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

.header-caption {
    font-size: 14px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.header-nav {
    display: flex;
    gap: 16px;
    flex-shrink: 0;
}

.nav-btn {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    border-radius: 4px;
    font-size: 14px;
    transition: var(--transition);
}

.nav-btn:hover {
    background: var(--light-bg);
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

/* Mobile Index Button */
.mobile-index-btn {
    display: none;
    position: fixed;
    bottom: 32px;
    right: 16px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 24px;
    z-index: 999;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.mobile-index-btn:active {
    transform: scale(0.95);
}

.index-icon {
    display: inline-block;
}

/* Mobile Index Modal */
.mobile-index-modal {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1001;
    animation: slideUp 0.3s ease;
}

.mobile-index-modal.active {
    display: flex;
    flex-direction: column;
}

.modal-overlay {
    position: absolute;
    top: -100%;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    height: 100vh;
    cursor: pointer;
}

.modal-content {
    position: relative;
    background: #fff;
    border-radius: 16px 16px 0 0;
    padding: 24px;
    max-height: 70vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
}

.modal-header h3 {
    font-size: 18px;
    margin: 0;
}

.modal-close {
    background: transparent;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-secondary);
}

.modal-nav {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.modal-nav-btn {
    padding: 16px;
    border: 1px solid var(--border-color);
    background: var(--light-bg);
    color: var(--text-primary);
    cursor: pointer;
    border-radius: 8px;
    text-align: left;
    transition: var(--transition);
    font-size: 15px;
}

.modal-nav-btn:active {
    background: var(--secondary-color);
    color: #fff;
    border-color: var(--secondary-color);
}

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

/* Sections */
.section-module {
    padding: 80px 0;
    scroll-margin-top: 80px;
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

.section-module h2 {
    font-size: 32px;
    margin-bottom: 48px;
    text-align: center;
    color: var(--primary-color);
}

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

/* Hero Section */
.hero {
    padding-top: 120px;
    padding-bottom: 80px;
    background: linear-gradient(135deg, #f8fafc, #e0f2fe);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
}

.hero-label {
    display: inline-block;
    padding: 6px 12px;
    background: var(--secondary-color);
    color: #fff;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.hero h1 {
    font-size: 48px;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--primary-color);
}

.hero-text {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
}

.btn {
    padding: 14px 28px;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: var(--light-bg);
}

.hero-warning {
    display: flex;
    gap: 12px;
    padding: 16px;
    background: rgba(245, 158, 11, 0.1);
    border-left: 4px solid var(--warning-color);
    border-radius: 4px;
}

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

.hero-warning p {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
}

.archive-card {
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.archive-media {
    margin-bottom: 16px;
    background: var(--light-bg);
    border-radius: 8px;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.archive-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.archive-tag {
    display: inline-block;
    padding: 6px 12px;
    background: var(--light-bg);
    color: var(--primary-color);
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

/* Hero Entries */
.hero-entries {
    background: #fff;
    border-top: 1px solid var(--border-color);
    padding: 60px 0;
}

.entry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.entry-item {
    padding: 32px 24px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.entry-item:hover {
    border-color: var(--secondary-color);
    background: var(--light-bg);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.entry-number {
    font-size: 28px;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 12px;
}

.entry-item h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--primary-color);
}

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

/* Archive Section */
.archive-layout {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 40px;
}

.archive-menu {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.archive-menu-btn {
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-primary);
    border-radius: 6px;
    cursor: pointer;
    text-align: left;
    transition: var(--transition);
    font-size: 14px;
}

.archive-menu-btn:hover,
.archive-menu-btn.active {
    background: var(--secondary-color);
    color: #fff;
    border-color: var(--secondary-color);
}

.archive-item {
    display: none;
}

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

.archive-item h3 {
    font-size: 24px;
    margin-bottom: 16px;
    color: var(--primary-color);
}

.archive-item p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.archive-notice {
    padding: 16px;
    background: var(--light-bg);
    border-left: 4px solid var(--primary-color);
    border-radius: 4px;
    margin-bottom: 24px;
}

.archive-notice p {
    margin: 0;
    font-size: 14px;
}

.archive-media {
    margin-top: 32px;
    background: var(--light-bg);
    border-radius: 8px;
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Install Section */
.install-index {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
}

.install-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: var(--transition);
}

.install-card:hover {
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-lg);
}

.install-header {
    padding: 24px;
    background: var(--light-bg);
    border-bottom: 1px solid var(--border-color);
}

.install-header h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--primary-color);
}

.install-badge {
    display: inline-block;
    padding: 4px 8px;
    background: var(--secondary-color);
    color: #fff;
    border-radius: 3px;
    font-size: 12px;
    font-weight: 600;
}

.install-body {
    padding: 24px;
}

.install-intro {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.install-steps {
    margin-bottom: 20px;
}

.install-steps h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.install-steps ul {
    list-style: none;
    padding: 0;
}

.install-steps li {
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
    font-size: 14px;
    color: var(--text-secondary);
}

.install-steps li:before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: 600;
}

.install-notice {
    padding: 16px;
    background: var(--light-bg);
    border-left: 4px solid var(--warning-color);
    border-radius: 4px;
    margin-bottom: 16px;
}

.install-notice p {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
}

.install-media {
    margin-top: 16px;
    background: var(--light-bg);
    border-radius: 8px;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Prepare Section */
.prepare-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.prepare-checklist {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.prepare-item {
    padding: 20px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: #fff;
    cursor: pointer;
    transition: var(--transition);
}

.prepare-item:hover {
    border-color: var(--secondary-color);
    background: var(--light-bg);
}

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

.prepare-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.prepare-item h3 {
    font-size: 16px;
    margin: 0;
    color: var(--primary-color);
}

.prepare-summary {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0 0 12px 0;
}

.prepare-expand {
    display: none;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

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

.prepare-tag {
    display: inline-block;
    padding: 4px 8px;
    background: var(--warning-color);
    color: #fff;
    border-radius: 3px;
    font-size: 12px;
    font-weight: 600;
}

.prepare-media {
    background: var(--light-bg);
    border-radius: 8px;
    min-height: 350px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Steps Section */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.step-card {
    padding: 24px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: #fff;
    cursor: pointer;
    transition: var(--transition);
}

.step-card:hover {
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-lg);
}

.step-number {
    font-size: 14px;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 8px;
}

.step-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--primary-color);
}

.step-summary {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.step-detail {
    display: none;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

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

.step-detail p {
    margin-bottom: 12px;
}

.step-detail p:last-child {
    margin-bottom: 0;
}

/* Preview Section */
.preview-layout {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 40px;
}

.preview-menu {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.preview-menu-btn {
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-primary);
    border-radius: 6px;
    cursor: pointer;
    text-align: left;
    transition: var(--transition);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.preview-menu-btn:hover,
.preview-menu-btn.active {
    background: var(--secondary-color);
    color: #fff;
    border-color: var(--secondary-color);
}

.preview-menu-num {
    font-weight: 600;
    font-size: 12px;
}

.preview-main {
    position: relative;
}

.preview-image {
    display: none;
}

.preview-image.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

.preview-media {
    background: var(--light-bg);
    border-radius: 8px;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.preview-image h4 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--primary-color);
}

.preview-image p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Security Section */
.security-layout {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 40px;
}

.security-menu {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.security-menu-btn {
    padding: 12px 12px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-primary);
    border-radius: 6px;
    cursor: pointer;
    text-align: center;
    transition: var(--transition);
    font-size: 13px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.security-menu-btn:hover,
.security-menu-btn.active {
    background: var(--secondary-color);
    color: #fff;
    border-color: var(--secondary-color);
}

.security-icon {
    font-size: 20px;
}

.security-content {
    position: relative;
}

.security-item {
    display: none;
}

.security-item.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

.security-item h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.security-body h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
    margin-top: 16px;
}

.security-body h4:first-child {
    margin-top: 0;
}

.security-body p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 12px;
}

.security-body ul {
    list-style: none;
    padding: 0;
    margin-bottom: 16px;
}

.security-body li {
    padding: 8px 0 8px 24px;
    position: relative;
    font-size: 14px;
    color: var(--text-secondary);
}

.security-body li:before {
    content: '•';
    position: absolute;
    left: 8px;
    color: var(--secondary-color);
    font-weight: 700;
}

.security-media {
    margin-top: 24px;
    background: var(--light-bg);
    border-radius: 8px;
    min-height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.security-summary {
    margin-top: 60px;
    padding: 32px;
    background: var(--light-bg);
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
}

.security-summary h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.security-principles {
    list-style: none;
    padding: 0;
}

.security-principles li {
    padding: 12px 0;
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.feature-card {
    padding: 24px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: #fff;
    cursor: pointer;
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-lg);
}

.feature-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--primary-color);
}

.feature-intro {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.feature-detail {
    display: none;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

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

.feature-detail p {
    margin-bottom: 12px;
}

.feature-detail p:last-child {
    margin-bottom: 0;
}

/* Confirm Section */
.confirm-checklist {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.confirm-item {
    padding: 20px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: #fff;
    cursor: pointer;
    transition: var(--transition);
}

.confirm-item:hover {
    border-color: var(--secondary-color);
    background: var(--light-bg);
}

.confirm-item.checked {
    border-color: var(--success-color);
    background: rgba(16, 185, 129, 0.05);
}

.confirm-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.confirm-checkbox {
    font-size: 20px;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.confirm-item.checked .confirm-checkbox {
    color: var(--success-color);
}

.confirm-item h3 {
    font-size: 16px;
    margin: 0;
    color: var(--text-primary);
}

.confirm-item p {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
}

.confirm-status {
    text-align: center;
    padding: 32px;
    background: var(--light-bg);
    border-radius: 8px;
}

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

.status-complete {
    font-size: 16px;
    color: var(--success-color);
    font-weight: 600;
}

/* FAQ Section */
.faq-categories {
    display: flex;
    gap: 12px;
    margin-bottom: 32px;
    flex-wrap: wrap;
    justify-content: center;
}

.faq-category-btn {
    padding: 10px 20px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    border-radius: 6px;
    font-size: 14px;
    transition: var(--transition);
}

.faq-category-btn:hover,
.faq-category-btn.active {
    background: var(--secondary-color);
    color: #fff;
    border-color: var(--secondary-color);
}

.faq-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100%, 1fr));
    gap: 16px;
}

.faq-item {
    display: none;
}

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

.faq-question {
    width: 100%;
    padding: 20px;
    border: 1px solid var(--border-color);
    background: var(--light-bg);
    border-radius: 6px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
    text-align: left;
}

.faq-question:hover {
    background: var(--secondary-color);
    color: #fff;
    border-color: var(--secondary-color);
}

.faq-icon {
    font-size: 18px;
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

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

.faq-answer {
    display: none;
    padding: 20px;
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 6px 6px;
    background: #fff;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.faq-item.expanded .faq-answer {
    display: block;
}

/* Footer */
.footer {
    background: var(--dark-bg);
    color: #fff;
    padding: 60px 0 0;
    margin-top: 80px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-section h4 {
    font-size: 16px;
    margin-bottom: 20px;
    color: #fff;
}

.footer-section p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

.footer-links,
.footer-alerts {
    list-style: none;
    padding: 0;
}

.footer-links li,
.footer-alerts li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

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

.footer-alerts li {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom {
    padding: 40px 0;
}

.footer-disclaimer {
    margin-bottom: 20px;
}

.footer-disclaimer p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.8;
    margin: 0;
}

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

.footer-copyright p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    margin: 0;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--secondary-color);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 20px;
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.back-to-top:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

/* Tablet & Medium Screens */
@media (max-width: 768px) {
    .header-nav {
        display: none;
    }

    .mobile-index-btn {
        display: flex;
    }

    .header-caption {
        display: none;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero h1 {
        font-size: 32px;
    }

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

    .archive-layout,
    .preview-layout,
    .security-layout,
    .prepare-layout {
        grid-template-columns: 1fr;
    }

    .archive-menu {
        flex-direction: row;
        overflow-x: auto;
        gap: 8px;
        padding-bottom: 12px;
    }

    .archive-menu-btn {
        flex-shrink: 0;
    }

    .prepare-media {
        margin-top: 32px;
    }

    .install-index {
        grid-template-columns: 1fr;
    }

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

    .preview-menu {
        flex-direction: row;
        overflow-x: auto;
        gap: 8px;
    }

    .preview-menu-btn {
        flex-shrink: 0;
        flex-direction: row;
    }

    .security-menu {
        flex-direction: row;
        overflow-x: auto;
        gap: 8px;
    }

    .security-menu-btn {
        flex-shrink: 0;
    }

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

    .section-module h2 {
        font-size: 24px;
        margin-bottom: 32px;
    }

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

    .confirm-checklist {
        grid-template-columns: 1fr;
    }

    .faq-categories {
        justify-content: flex-start;
    }

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

    .back-to-top {
        width: 44px;
        height: 44px;
        bottom: 24px;
        right: 16px;
        font-size: 18px;
    }

    .mobile-index-btn {
        width: 52px;
        height: 52px;
        bottom: 24px;
        right: 16px;
    }
}

/* Mobile Screens */
@media (max-width: 480px) {
    .header-content {
        gap: 12px;
        padding: 0 12px;
    }

    .brand-text {
        font-size: 16px;
    }

    .hero {
        padding-top: 100px;
        padding-bottom: 40px;
    }

    .hero h1 {
        font-size: 24px;
        margin-bottom: 16px;
    }

    .hero-text {
        font-size: 14px;
        margin-bottom: 20px;
    }

    .hero-buttons {
        gap: 12px;
    }

    .btn {
        padding: 12px 16px;
        font-size: 14px;
    }

    .hero-entries {
        padding: 40px 0;
    }

    .entry-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .entry-item {
        padding: 20px 16px;
    }

    .archive-card {
        padding: 16px;
    }

    .section-module {
        padding: 40px 0;
    }

    .section-module h2 {
        font-size: 20px;
        margin-bottom: 24px;
    }

    .archive-layout,
    .preview-layout,
    .security-layout,
    .prepare-layout {
        gap: 24px;
    }

    .archive-menu {
        gap: 6px;
    }

    .archive-menu-btn {
        padding: 10px 12px;
        font-size: 13px;
    }

    .archive-item h3 {
        font-size: 20px;
    }

    .archive-media {
        min-height: 200px;
    }

    .install-card {
        border-radius: 6px;
    }

    .install-header {
        padding: 16px;
    }

    .install-body {
        padding: 16px;
    }

    .prepare-number {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }

    .prepare-item {
        padding: 16px;
    }

    .prepare-item h3 {
        font-size: 15px;
    }

    .step-card {
        padding: 16px;
    }

    .step-card h3 {
        font-size: 16px;
    }

    .preview-media {
        min-height: 300px;
    }

    .security-menu {
        gap: 6px;
    }

    .security-menu-btn {
        padding: 10px;
        font-size: 12px;
    }

    .security-item h3 {
        font-size: 20px;
    }

    .security-media {
        min-height: 200px;
    }

    .security-summary {
        padding: 20px;
    }

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

    .feature-card {
        padding: 16px;
    }

    .feature-card h3 {
        font-size: 16px;
    }

    .confirm-checklist {
        gap: 12px;
    }

    .confirm-item {
        padding: 16px;
    }

    .confirm-item h3 {
        font-size: 15px;
    }

    .faq-question {
        padding: 16px;
        font-size: 14px;
    }

    .footer-content {
        gap: 32px;
    }

    .footer-section h4 {
        font-size: 15px;
        margin-bottom: 16px;
    }

    .footer-bottom {
        padding: 32px 0;
    }

    .back-to-top {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }

    .modal-content {
        border-radius: 12px 12px 0 0;
        padding: 16px;
    }

    .modal-header {
        margin-bottom: 16px;
        padding-bottom: 12px;
    }
}