/* ========== CSS Reset & Base ========== */
:root {
  --trust-blue: #1e3a8a;
  --trust-blue-light: #3b82f6;
  --trust-blue-lighter: #dbeafe;
  --dark-blue: #0f172a;
  --white: #ffffff;
  --gray-light: #f8fafc;
  --gray-medium: #e2e8f0;
  --gray-dark: #64748b;
  --success-green: #10b981;
  --warning-orange: #f97316;
  --container: 1180px;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
  line-height: 1.6;
  color: var(--dark-blue);
  background-color: var(--white);
}

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

/* ========== Typography ========== */
h1 {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 2rem;
  color: var(--trust-blue);
  text-align: center;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1rem;
  font-size: 0.95rem;
  line-height: 1.7;
}

ul, ol {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

li {
  margin-bottom: 0.5rem;
}

/* ========== Images ========== */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

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

/* ========== Progress Line ========== */
.progress-line {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(to right, var(--trust-blue), var(--trust-blue-light));
  z-index: 1000;
  width: 0%;
  transition: width 0.2s ease;
}

/* ========== Ledger Header ========== */
.ledger-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--white);
  border-bottom: 1px solid var(--gray-medium);
  z-index: 100;
  padding: 1rem 0;
  transition: all var(--transition);
}

.ledger-header.scrolled {
  padding: 0.5rem 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.ledger-header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.ledger-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: fit-content;
}

.logo-img {
  width: 32px;
  height: 32px;
  transition: all var(--transition);
}

.ledger-header.scrolled .logo-img {
  width: 24px;
  height: 24px;
}

.logo-text {
  font-weight: 700;
  color: var(--trust-blue);
  font-size: 1.1rem;
  white-space: nowrap;
}

.ledger-title {
  font-size: 0.95rem;
  color: var(--gray-dark);
  flex: 1;
  text-align: center;
  white-space: nowrap;
  opacity: 1;
  transition: opacity var(--transition);
}

.ledger-header.scrolled .ledger-title {
  opacity: 0;
  position: absolute;
  pointer-events: none;
}

.ledger-nav {
  display: flex;
  gap: 1rem;
  min-width: fit-content;
}

.nav-btn {
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px solid var(--trust-blue);
  color: var(--trust-blue);
  border-radius: 4px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.nav-btn:hover {
  background: var(--trust-blue);
  color: var(--white);
}

.ledger-menu-btn {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.ledger-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--trust-blue);
  transition: all var(--transition);
}

/* ========== Mobile Menu ========== */
.ledger-menu {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--white);
  border-top: 1px solid var(--gray-medium);
  transform: translateY(100%);
  transition: transform var(--transition);
  z-index: 99;
  max-height: 80vh;
  overflow-y: auto;
  padding-bottom: 2rem;
}

.ledger-menu.active {
  transform: translateY(0);
}

.menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--gray-medium);
}

.menu-header h2 {
  font-size: 1.5rem;
  margin: 0;
}

.menu-close {
  background: transparent;
  border: none;
  font-size: 2rem;
  cursor: pointer;
  color: var(--gray-dark);
}

.menu-items {
  display: flex;
  flex-direction: column;
}

.menu-item {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--gray-medium);
  color: var(--dark-blue);
  text-decoration: none;
  transition: background var(--transition);
}

.menu-item:hover {
  background: var(--trust-blue-lighter);
}

/* ========== Main Content Margin ========== */
main {
  margin-top: 80px;
}

/* ========== Buttons ========== */
.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

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

.btn-primary:hover {
  background: var(--dark-blue);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.2);
}

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

.btn-secondary:hover {
  background: var(--trust-blue-lighter);
}

/* ========== Hero Section ========== */
.hero-section {
  padding: 4rem 0;
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.03), rgba(59, 130, 246, 0.03));
}

.hero-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  margin-bottom: 4rem;
}

.hero-label {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--trust-blue-lighter);
  color: var(--trust-blue);
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.hero-description {
  font-size: 1.05rem;
  color: var(--gray-dark);
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

.hero-warning {
  padding: 1rem;
  background: #fef3c7;
  border-left: 4px solid var(--warning-orange);
  border-radius: 4px;
  font-size: 0.9rem;
  color: #92400e;
}

.hero-cover {
  display: flex;
  justify-content: center;
  align-items: center;
}

.ledger-cover {
  position: relative;
  display: inline-block;
}

.cover-image {
  width: 100%;
  max-width: 400px;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.ledger-tabs {
  position: absolute;
  bottom: 0;
  right: 0;
  display: flex;
  gap: 0.5rem;
}

.ledger-tab {
  padding: 0.5rem 0.75rem;
  background: var(--trust-blue);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 4px;
  margin: 1rem;
}

.hero-summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.summary-item {
  padding: 1.5rem;
  background: var(--white);
  border: 1px solid var(--gray-medium);
  border-radius: 8px;
  text-align: center;
  transition: all var(--transition);
}

.summary-item:hover {
  border-color: var(--trust-blue);
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.1);
}

.summary-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.summary-item h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.summary-item p {
  font-size: 0.85rem;
  color: var(--gray-dark);
  margin: 0;
}

/* ========== Assets Index Section ========== */
.assets-index-section {
  padding: 4rem 0;
  background: var(--white);
}

.index-layout {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 3rem;
}

.index-menu {
  background: var(--gray-light);
  padding: 1.5rem;
  border-radius: 8px;
  height: fit-content;
  position: sticky;
  top: 100px;
}

.menu-title {
  font-weight: 700;
  color: var(--trust-blue);
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.menu-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.menu-option {
  padding: 0.75rem 1rem;
  background: var(--white);
  border: 1px solid transparent;
  border-radius: 4px;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition);
  color: var(--gray-dark);
  font-weight: 500;
}

.menu-option:hover {
  background: var(--trust-blue-lighter);
  color: var(--trust-blue);
}

.menu-option.active {
  background: var(--trust-blue);
  color: var(--white);
  border-color: var(--trust-blue);
}

.index-content {
  position: relative;
}

.page-info {
  display: none;
  animation: fadeIn 0.3s ease;
}

.page-info.active {
  display: block;
}

.page-image {
  margin-top: 2rem;
  border-radius: 8px;
  overflow: hidden;
}

.page-img {
  width: 100%;
  border-radius: 8px;
}

/* ========== Flow Table Section ========== */
.flow-table-section {
  padding: 4rem 0;
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.02), rgba(59, 130, 246, 0.02));
}

.flow-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.flow-item {
  background: var(--white);
  border: 1px solid var(--gray-medium);
  border-radius: 8px;
  overflow: hidden;
  transition: all var(--transition);
}

.flow-item:hover {
  border-color: var(--trust-blue);
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.1);
}

.flow-header {
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  background: linear-gradient(90deg, var(--trust-blue-lighter), var(--white));
  cursor: pointer;
  user-select: none;
}

.flow-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--trust-blue);
  color: var(--white);
  border-radius: 50%;
  font-weight: 700;
  flex-shrink: 0;
}

.flow-header h3 {
  margin: 0;
  flex: 1;
}

.flow-details {
  padding: 0 1.5rem 1.5rem;
  border-top: 1px solid var(--gray-medium);
}

.flow-details p {
  margin-bottom: 1rem;
}

.flow-image {
  margin-top: 1.5rem;
  border-radius: 8px;
  overflow: hidden;
}

.flow-img {
  width: 100%;
  border-radius: 8px;
}

/* ========== Network Ledger Section ========== */
.network-ledger-section {
  padding: 4rem 0;
  background: var(--white);
}

.ledger-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 3rem;
}

.ledger-column {
  background: var(--white);
  border: 2px solid var(--gray-medium);
  border-radius: 8px;
  padding: 1.5rem;
  transition: all var(--transition);
}

.ledger-column:hover {
  border-color: var(--trust-blue);
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.1);
}

.column-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.column-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--trust-blue);
  color: var(--white);
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.column-header h3 {
  margin: 0;
}

.column-content {
  margin-bottom: 1rem;
}

.column-content p {
  font-size: 0.9rem;
  color: var(--gray-dark);
  margin-bottom: 1rem;
}

.column-items {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.item {
  padding: 0.5rem;
  background: var(--gray-light);
  border-radius: 4px;
  font-size: 0.85rem;
  padding-left: 1rem;
  border-left: 3px solid var(--trust-blue);
}

.check-btn {
  padding: 0.5rem 1rem;
  background: var(--trust-blue-lighter);
  color: var(--trust-blue);
  border: 1px solid var(--trust-blue);
  border-radius: 4px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
  transition: all var(--transition);
  width: 100%;
}

.check-btn:hover {
  background: var(--trust-blue);
  color: var(--white);
}

.column-details {
  background: var(--gray-light);
  padding: 1rem;
  border-radius: 4px;
  margin-top: 1rem;
}

.column-details h4 {
  color: var(--trust-blue);
  margin-bottom: 0.75rem;
}

.column-details ul {
  margin-left: 1.5rem;
}

.column-details li {
  font-size: 0.85rem;
  color: var(--gray-dark);
}

.ledger-image {
  border-radius: 8px;
  overflow: hidden;
}

/* ========== Audit Ledger Section ========== */
.audit-ledger-section {
  padding: 4rem 0;
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.02), rgba(59, 130, 246, 0.02));
}

.audit-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.audit-items {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.audit-item {
  background: var(--white);
  border: 2px solid var(--gray-medium);
  border-radius: 8px;
  padding: 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
  justify-content: center;
  min-height: 140px;
  position: relative;
}

.audit-item:hover {
  border-color: var(--trust-blue);
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.1);
}

.audit-item.active {
  border-color: var(--trust-blue);
  background: var(--trust-blue-lighter);
}

.audit-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--trust-blue);
  color: var(--white);
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.85rem;
}

.audit-item h3 {
  margin: 0;
  font-size: 1rem;
}

.audit-status {
  font-size: 0.75rem;
  padding: 0.25rem 0.75rem;
  background: var(--gray-medium);
  border-radius: 4px;
  color: var(--gray-dark);
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
}

.audit-item.completed .audit-status {
  background: var(--success-green);
  color: var(--white);
  content: '✓ 已确认';
}

.audit-details {
  flex: 1;
  background: var(--white);
  border: 2px solid var(--gray-medium);
  border-radius: 8px;
  padding: 2rem;
  position: relative;
}

.audit-content {
  display: none;
}

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

.audit-content h3 {
  color: var(--trust-blue);
  margin-bottom: 1rem;
}

.risk-badge {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.risk-high {
  background: #fee2e2;
  color: #991b1b;
}

.risk-medium {
  background: #fef3c7;
  color: #92400e;
}

.risk-low {
  background: #d1fae5;
  color: #065f46;
}

.audit-content p {
  margin-bottom: 1rem;
}

.audit-content ul {
  margin-left: 1.5rem;
}

.audit-content li {
  font-size: 0.9rem;
  color: var(--gray-dark);
  margin-bottom: 0.5rem;
}

.audit-image {
  border-radius: 8px;
  overflow: hidden;
}

/* ========== App Preview Section ========== */
.app-preview-section {
  padding: 4rem 0;
  background: var(--white);
}

.preview-layout {
  display: grid;
  grid-template-columns: 150px 1fr 1fr;
  gap: 2rem;
  align-items: center;
}

.preview-menu {
  background: var(--gray-light);
  padding: 1.5rem;
  border-radius: 8px;
  height: fit-content;
}

.preview-menu h3 {
  color: var(--trust-blue);
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.preview-items {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.preview-btn {
  padding: 0.75rem;
  background: var(--white);
  border: 2px solid var(--gray-medium);
  border-radius: 4px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--gray-dark);
  transition: all var(--transition);
}

.preview-btn:hover,
.preview-btn.active {
  border-color: var(--trust-blue);
  background: var(--trust-blue);
  color: var(--white);
}

.preview-image {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 500px;
  background: var(--gray-light);
  border-radius: 8px;
  overflow: hidden;
}

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

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

.preview-media {
  max-width: 100%;
  height: auto;
}

.preview-info {
  background: var(--white);
  border: 1px solid var(--gray-medium);
  border-radius: 8px;
  padding: 1.5rem;
  height: fit-content;
}

.preview-info h3 {
  color: var(--trust-blue);
  margin-bottom: 1rem;
}

.preview-description {
  display: none;
}

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

.preview-description p {
  font-size: 0.9rem;
  color: var(--gray-dark);
}

.preview-description strong {
  color: var(--trust-blue);
}

/* ========== Scenario Ledger Section ========== */
.scenario-ledger-section {
  padding: 4rem 0;
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.02), rgba(59, 130, 246, 0.02));
}

.scenario-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.scenario-buttons {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.scenario-btn {
  padding: 1.5rem;
  background: var(--white);
  border: 2px solid var(--gray-medium);
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: all var(--transition);
  text-align: left;
}

.scenario-btn:hover,
.scenario-btn.active {
  border-color: var(--trust-blue);
  background: var(--trust-blue-lighter);
}

.scenario-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.scenario-name {
  font-weight: 600;
  color: var(--dark-blue);
}

.scenario-content {
  position: relative;
}

.scenario-info {
  display: none;
  animation: fadeIn 0.3s ease;
}

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

.scenario-info h3 {
  color: var(--trust-blue);
  margin-bottom: 1rem;
}

.scenario-info p {
  color: var(--gray-dark);
  margin-bottom: 1rem;
}

.scenario-image {
  margin-top: 1.5rem;
  border-radius: 8px;
  overflow: hidden;
  background: var(--gray-light);
}

/* ========== Confirm Settlement Section ========== */
.confirm-settlement-section {
  padding: 4rem 0;
  background: var(--white);
}

.confirm-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.confirm-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1.5rem;
  align-items: center;
  padding: 1.5rem;
  background: var(--white);
  border: 2px solid var(--gray-medium);
  border-radius: 8px;
  transition: all var(--transition);
}

.confirm-item:hover {
  border-color: var(--trust-blue);
  background: var(--trust-blue-lighter);
}

.confirm-item.completed {
  border-color: var(--success-green);
  background: #d1fae5;
}

.confirm-checkbox {
  width: 24px;
  height: 24px;
  cursor: pointer;
  accent-color: var(--trust-blue);
}

.confirm-item label {
  display: flex;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
  margin: 0;
}

.confirm-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.confirm-text {
  text-align: left;
}

.confirm-text strong {
  display: block;
  color: var(--dark-blue);
  margin-bottom: 0.25rem;
}

.confirm-text p {
  font-size: 0.85rem;
  color: var(--gray-dark);
  margin: 0;
}

.confirm-status {
  font-size: 0.85rem;
  padding: 0.5rem 1rem;
  background: var(--gray-medium);
  color: var(--gray-dark);
  border-radius: 4px;
  white-space: nowrap;
  font-weight: 600;
}

.confirm-item.completed .confirm-status {
  background: var(--success-green);
  color: var(--white);
}

.confirm-message {
  padding: 1.5rem;
  background: #d1fae5;
  border: 2px solid var(--success-green);
  border-radius: 8px;
  text-align: center;
  color: #065f46;
  font-weight: 600;
}

/* ========== FAQ Section ========== */
.faq-ledger-section {
  padding: 4rem 0;
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.02), rgba(59, 130, 246, 0.02));
}

.faq-layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2rem;
}

.faq-menu {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  height: fit-content;
  position: sticky;
  top: 100px;
}

.faq-category {
  padding: 0.75rem 1rem;
  background: var(--white);
  border: 2px solid var(--gray-medium);
  border-radius: 4px;
  cursor: pointer;
  font-weight: 600;
  color: var(--gray-dark);
  transition: all var(--transition);
  text-align: left;
  font-size: 0.95rem;
}

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

.faq-content {
  display: flex;
  flex-direction: column;
}

.faq-list {
  display: none;
}

.faq-list.active {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--white);
  border: 1px solid var(--gray-medium);
  border-radius: 8px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 1.5rem;
  background: linear-gradient(90deg, var(--trust-blue-lighter), var(--white));
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--dark-blue);
  transition: all var(--transition);
  text-align: left;
  font-size: 0.95rem;
}

.faq-question:hover {
  background: var(--trust-blue-lighter);
}

.faq-icon {
  font-size: 1.25rem;
  transition: transform var(--transition);
}

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

.faq-answer {
  display: none;
  padding: 1.5rem;
  border-top: 1px solid var(--gray-medium);
  color: var(--gray-dark);
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  display: block;
  animation: slideDown 0.3s ease;
}

.faq-answer strong {
  color: var(--trust-blue);
  display: block;
  margin-top: 0.75rem;
  margin-bottom: 0.5rem;
}

/* ========== Footer ========== */
.ledger-footer {
  background: var(--dark-blue);
  color: var(--white);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-section h4 {
  color: var(--trust-blue-light);
  margin-bottom: 1rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.footer-logo-img {
  width: 32px;
  height: 32px;
}

.footer-logo h3 {
  margin: 0;
  font-size: 1.1rem;
}

.footer-section p {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 0;
}

.footer-links {
  list-style: none;
  margin: 0;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color var(--transition);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--trust-blue-light);
}

.footer-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-notice h4,
.footer-disclaimer h4 {
  color: var(--trust-blue-light);
  margin-bottom: 0.75rem;
}

.footer-notice p,
.footer-disclaimer p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 0;
}

.footer-bottom {
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ========== Scroll to Top Button ========== */
.scroll-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  background: var(--trust-blue);
  color: var(--white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.3);
  transition: all var(--transition);
  z-index: 50;
}

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

/* ========== Preview Layer ========== */
.preview-layer {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 2rem;
}

.preview-layer-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  background: var(--white);
  border-radius: 8px;
  overflow: auto;
}

.layer-image {
  width: 100%;
  height: auto;
  display: block;
}

.preview-layer-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 40px;
  height: 40px;
  background: var(--white);
  border: none;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  transition: all var(--transition);
}

.preview-layer-close:hover {
  background: var(--trust-blue);
  color: var(--white);
}

/* ========== Animations ========== */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    max-height: 0;
  }
  to {
    opacity: 1;
    max-height: 1000px;
  }
}

/* ========== Mobile Responsive ========== */
@media (max-width: 1024px) {
  h1 {
    font-size: 1.8rem;
  }

  h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
  }

  .hero-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .ledger-tabs {
    flex-wrap: wrap;
  }

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

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

  .index-menu {
    position: static;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
  }

  .menu-option {
    flex: 1;
    min-width: 150px;
  }

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

  .audit-layout {
    grid-template-columns: 1fr;
  }

  .audit-items {
    grid-template-columns: 1fr;
  }

  .audit-item {
    min-height: auto;
  }

  .preview-layout {
    grid-template-columns: 1fr;
  }

  .preview-menu {
    position: static;
  }

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

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

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

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

  .faq-menu {
    position: static;
    display: flex;
    gap: 0.75rem;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .faq-category {
    flex: 1;
    min-width: 120px;
  }
}

@media (max-width: 768px) {
  :root {
    --container: 100%;
  }

  .container {
    width: 100%;
    padding: 0 16px;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
  }

  h3 {
    font-size: 1.1rem;
  }

  .ledger-header {
    padding: 0.75rem 0;
  }

  .ledger-header-content {
    gap: 1rem;
  }

  .ledger-title {
    display: none;
  }

  .ledger-nav {
    display: none;
  }

  .ledger-menu-btn {
    display: flex;
  }

  main {
    margin-top: 60px;
  }

  .hero-section {
    padding: 2rem 0;
  }

  .hero-cover {
    order: -1;
  }

  .cover-image {
    max-width: 300px;
  }

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

  .btn {
    width: 100%;
  }

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

  .flow-list {
    gap: 0.75rem;
  }

  .flow-header {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }

  .flow-header h3 {
    margin: 0;
  }

  .preview-image {
    min-height: 400px;
  }

  .scenario-buttons {
    gap: 0.75rem;
  }

  .scenario-btn {
    padding: 1rem;
    flex-direction: column;
    text-align: center;
  }

  .confirm-item {
    grid-template-columns: auto 1fr;
    gap: 1rem;
  }

  .confirm-status {
    grid-column: 2;
  }

  .preview-layout {
    gap: 1rem;
  }

  .preview-info {
    padding: 1rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .footer-info {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .scroll-to-top {
    bottom: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .container {
    width: 100%;
    padding: 0 12px;
  }

  h1 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
  }

  h2 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
  }

  .ledger-header {
    padding: 0.5rem 0;
  }

  .ledger-logo {
    gap: 0.5rem;
  }

  .logo-img {
    width: 28px;
    height: 28px;
  }

  .logo-text {
    font-size: 0.95rem;
  }

  main {
    margin-top: 50px;
  }

  .hero-section {
    padding: 1.5rem 0;
  }

  .hero-label {
    font-size: 0.8rem;
    padding: 0.4rem 0.8rem;
    margin-bottom: 0.75rem;
  }

  .hero-actions {
    gap: 0.5rem;
  }

  .btn {
    padding: 0.6rem 1rem;
    font-size: 0.85rem;
  }

  .hero-warning {
    padding: 0.75rem;
    font-size: 0.8rem;
    border-left-width: 3px;
  }

  .summary-item {
    padding: 1rem;
  }

  .summary-icon {
    font-size: 1.5rem;
  }

  .summary-item h3 {
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
  }

  .summary-item p {
    font-size: 0.75rem;
  }

  .flow-number {
    width: 36px;
    height: 36px;
    font-size: 0.8rem;
  }

  .flow-header h3 {
    font-size: 1rem;
  }

  .flow-details {
    padding: 1rem;
  }

  .flow-details p {
    font-size: 0.85rem;
    margin-bottom: 0.75rem;
  }

  .column-number {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
  }

  .column-content p {
    font-size: 0.85rem;
  }

  .item {
    font-size: 0.8rem;
    padding: 0.4rem 0.75rem;
    border-left-width: 2px;
  }

  .check-btn {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
  }

  .audit-number {
    width: 32px;
    height: 32px;
    font-size: 0.75rem;
  }

  .audit-item h3 {
    font-size: 0.9rem;
  }

  .risk-badge {
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
  }

  .preview-items {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .preview-btn {
    padding: 0.6rem;
    font-size: 0.85rem;
  }

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

  .preview-info h3 {
    font-size: 1rem;
  }

  .preview-description p {
    font-size: 0.85rem;
  }

  .scenario-btn {
    padding: 1rem 0.75rem;
    gap: 0.75rem;
  }

  .scenario-icon {
    font-size: 1.25rem;
  }

  .scenario-name {
    font-size: 0.9rem;
  }

  .confirm-item {
    padding: 1rem;
    gap: 0.75rem;
  }

  .confirm-checkbox {
    width: 20px;
    height: 20px;
  }

  .confirm-icon {
    font-size: 1.25rem;
  }

  .confirm-text strong {
    font-size: 0.9rem;
  }

  .confirm-text p {
    font-size: 0.8rem;
  }

  .faq-question {
    padding: 1rem;
    font-size: 0.9rem;
  }

  .faq-answer {
    padding: 1rem;
    font-size: 0.85rem;
  }

  .footer-content {
    gap: 1rem;
  }

  .footer-section h4 {
    font-size: 0.9rem;
  }

  .footer-section p,
  .footer-links a {
    font-size: 0.8rem;
  }

  .menu-item {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
  }

  .menu-header h2 {
    font-size: 1.1rem;
  }
}