/* ============================================
   AQX Cert - Complete CSS Styles
   Design System Variables & Base Styles
   ============================================ */

:root {
  /* Color Variables - Light Theme */
  --background: #ffffff;
  --foreground: #1e293b;
  --card: #ffffff;
  --card-foreground: #1e293b;
  --popover: #ffffff;
  --popover-foreground: #1e293b;
  --primary: #ec4899;
  --primary-foreground: #ffffff;
  --secondary: #0f172a;
  --secondary-foreground: #ffffff;
  --muted: #f8fafc;
  --muted-foreground: #334155; /* 从 #475569 改为更深的颜色增强对比度 */
  --accent: #f8fafc;
  --accent-foreground: #0f172a;
  --destructive: #ef4444;
  --destructive-foreground: #ffffff;
  --border: #e2e8f0;
  --input: #e2e8f0;
  --ring: #ec4899;
  
  /* Typography */
  --font-sans: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  --font-mono: 'Monaco', 'Courier New', monospace;
  
  /* Spacing */
  --radius: 0.75rem;
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    /* Color Variables - Dark Theme */
    --background: #0f172a;
    --foreground: #e2e8f0;
    --card: #1e293b;
    --card-foreground: #e2e8f0;
    --popover: #1e293b;
    --popover-foreground: #e2e8f0;
    --primary: #ec4899;
    --primary-foreground: #ffffff;
    --secondary: #1e293b;
    --secondary-foreground: #e2e8f0;
    --muted: #1e293b;
    --muted-foreground: #94a3b8;
    --accent: #1e293b;
    --accent-foreground: #e2e8f0;
    --border: #1e293b;
    --input: #1e293b;
    --ring: #ec4899;
  }
}

/* ============================================
   Base Styles
   ============================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--background);
  color: var(--foreground);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Typography
   ============================================ */

h1 {
  font-size: 2.25rem;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-4);
}

h2 {
  font-size: 1.875rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--spacing-4);
  color: #0f172a;
}

@media (prefers-color-scheme: dark) {
  h2 {
    color: #e2e8f0;
  }
}

h3 {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: var(--spacing-3);
  color: #0f172a;
}

@media (prefers-color-scheme: dark) {
  h3 {
    color: #e2e8f0;
  }
}

p {
  font-size: 1.0625rem; /* 从 1rem 放大，提高可读性 */
  line-height: 1.8; /* 略微增加行高 */
  margin-bottom: var(--spacing-4);
  color: #334155; /* 从 #475569 加深颜色，增强对比度 */
}

@media (prefers-color-scheme: dark) {
  p {
    color: #cbd5e1;
  }
}

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

a:hover {
  color: #db2777;
  text-decoration: underline;
}

small {
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

/* ============================================
   Layout
   ============================================ */

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
}

.container {
  max-width: 80rem;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
}

.container-sm {
  max-width: 48rem;
}

.container-lg {
  max-width: 90rem;
}

/* ============================================
   Header & Navigation
   ============================================ */

header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid #1e293b;
  background-color: #0f172a;
  color: white;
}

header .container {
  display: flex;
  height: 3.5rem;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: white;
  text-decoration: none;
}

.logo svg {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--primary);
}

.logo:hover {
  color: white;
  text-decoration: none;
}

/* Desktop Navigation */
.nav-desktop {
  display: none;
  align-items: center;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .nav-desktop {
    display: flex;
  }
}

.nav-desktop a {
  font-size: 0.875rem;
  color: #94a3b8;
  transition: color 0.3s ease;
}

.nav-desktop a:hover {
  color: white;
  text-decoration: none;
}

.nav-desktop .btn {
  margin-left: auto;
}

/* Mobile Menu Button */
.menu-button {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.375rem;
  background: transparent;
  border: none;
  color: #e2e8f0;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

@media (max-width: 767px) {
  .menu-button {
    display: flex;
  }
}

.menu-button:hover {
  background-color: #1e293b;
  color: white;
}

.menu-button svg {
  width: 1.5rem;
  height: 1.5rem;
}

/* Mobile Navigation */
.nav-mobile {
  display: none;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  background-color: #0f172a;
}

@media (max-width: 767px) {
  .nav-mobile {
    display: block;
  }
}

.nav-mobile.active {
  max-height: 24rem;
}

.nav-mobile-inner {
  padding: var(--spacing-4);
}

.nav-mobile-inner > * + * {
  margin-top: var(--spacing-2);
}

.nav-mobile a {
  display: block;
  padding: var(--spacing-3) var(--spacing-3);
  font-size: 0.875rem;
  color: #94a3b8;
  border-radius: 0.375rem;
  transition: all 0.3s ease;
  margin-bottom: var(--spacing-2);
}

.nav-mobile a:hover {
  background-color: #1e293b;
  color: white;
  text-decoration: none;
}

/* ============================================
   Footer
   ============================================ */

footer {
  margin-top: 3rem;
  border-top: 1px solid #1e293b;
  background: linear-gradient(to right, #0f172a, #1e293b);
  color: #cbd5e1;
}

footer .container {
  padding-top: 3rem;
  padding-bottom: 3rem;
}

.footer-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
  margin-bottom: 3rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.footer-section h3 {
  font-size: 1rem;
  font-weight: 600;
  color: white;
  margin-bottom: var(--spacing-4);
}

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

.footer-section li {
  margin-bottom: var(--spacing-3);
}

.footer-section a {
  color: #cbd5e1;
  transition: color 0.3s ease;
}

.footer-section a:hover {
  color: var(--primary);
  text-decoration: none;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-4);
  font-size: 1.25rem;
  font-weight: 900;
  color: white;
}

.footer-logo svg {
  width: 1.5rem;
  height: 1.5rem;
  color: var(--primary);
}

.footer-desc {
  font-size: 0.9375rem; /* 从 0.875rem 放大 */
  line-height: 1.6;
  color: #94a3b8;
  margin-bottom: var(--spacing-4);
}

.footer-framework {
  margin-top: var(--spacing-4);
}

.framework-label {
  font-size: 0.75rem;
  color: #64748b;
  text-transform: uppercase;
  font-weight: 600;
}

.framework-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 2.5rem;
  padding: 0 var(--spacing-4);
  margin-top: var(--spacing-2);
  border-radius: 0.375rem;
  background-color: #cbd5e1;
  font-size: 0.875rem;
  font-weight: 700;
  color: #0f172a;
}

.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: var(--spacing-8);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
  text-align: center;
  font-size: 0.875rem;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-bottom p {
  margin-bottom: 0;
  color: #64748b;
}

/* ============================================
   Page Hero
   ============================================ */

.page-hero {
  padding: 4rem var(--spacing-4);
  text-align: center;
  background: linear-gradient(to bottom, white, #f8fafc);
}

@media (min-width: 768px) {
  .page-hero {
    padding: 6rem var(--spacing-4);
  }
}

.page-hero-container {
  max-width: 56rem;
  margin-left: auto;
  margin-right: auto;
}

.page-hero h1 {
  font-size: 2rem;
  color: #0f172a;
  margin-bottom: var(--spacing-2);
}

@media (min-width: 768px) {
  .page-hero h1 {
    font-size: 2.25rem;
  }
}

.page-hero-subtitle {
  font-size: 1.125rem;
  color: var(--primary);
  font-weight: 600;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-2) var(--spacing-4);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s ease;
  gap: var(--spacing-2);
}

.btn:hover {
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: #db2777;
}

.btn-secondary {
  background-color: var(--secondary);
  color: var(--secondary-foreground);
}

.btn-secondary:hover {
  background-color: #1e293b;
}

.btn-outline {
  border: 1px solid var(--border);
  color: var(--foreground);
  background-color: transparent;
}

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

.btn-sm {
  padding: var(--spacing-1) var(--spacing-3);
  font-size: 0.75rem;
}

.btn-lg {
  padding: var(--spacing-3) var(--spacing-6);
  font-size: 1rem;
  width: 100%;
}

@media (min-width: 768px) {
  .btn-lg {
    width: auto;
  }
}

/* ============================================
   Cards
   ============================================ */

.card {
  background-color: var(--card);
  color: var(--card-foreground);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: var(--spacing-6);
  transition: all 0.3s ease;
}

.card:hover {
  border-color: var(--primary);
  box-shadow: 0 10px 25px rgba(236, 72, 153, 0.1);
}

.card-header {
  margin-bottom: var(--spacing-4);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-2);
}

.card-subtitle {
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.card-content {
  margin-bottom: var(--spacing-4);
}

.card-footer {
  border-top: 1px solid var(--border);
  padding-top: var(--spacing-4);
  margin-top: var(--spacing-4);
}

/* ============================================
   Features Grid
   ============================================ */

.features-grid {
  display: grid;
  gap: var(--spacing-6);
  grid-template-columns: 1fr;
  margin-bottom: var(--spacing-12);
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.feature-icon {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(236, 72, 153, 0.1);
  border-radius: var(--radius);
  color: var(--primary);
}

.feature-icon svg {
  width: 1.25rem;
  height: 1.25rem;
}

.feature-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: #0f172a;
}

@media (prefers-color-scheme: dark) {
  .feature-title {
    color: #e2e8f0;
  }
}

.feature-desc {
  font-size: 0.9375rem; /* 从 0.875rem 放大 */
  color: #334155;
}

@media (prefers-color-scheme: dark) {
  .feature-desc {
    color: #cbd5e1;
  }
}

/* ============================================
   Lists
   ============================================ */

ul {
  list-style: none;
}

li {
  margin-bottom: var(--spacing-2);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
}

li::before {
  content: "✓";
  color: var(--primary);
  font-weight: bold;
  flex-shrink: 0;
  margin-top: 0.125rem;
}

/* ============================================
   Sections
   ============================================ */

section {
  padding: var(--spacing-12) var(--spacing-4);
}

@media (max-width: 767px) {
  section {
    padding: var(--spacing-8) var(--spacing-4);
  }
}

.section-title {
  font-size: 1.875rem;
  font-weight: 700;
  margin-bottom: var(--spacing-6);
  text-align: center;
  color: #0f172a;
}

@media (prefers-color-scheme: dark) {
  .section-title {
    color: #e2e8f0;
  }
}

/* ============================================
   Hero Sections
   ============================================ */

.hero {
  background: linear-gradient(to bottom, white, #f8fafc);
  padding: 4rem var(--spacing-4);
  text-align: center;
}

@media (min-width: 768px) {
  .hero {
    padding: 6rem var(--spacing-4);
  }
}

.hero-container {
  max-width: 56rem;
  margin-left: auto;
  margin-right: auto;
}

.hero h1 {
  font-size: 2rem;
  color: #0f172a;
}

@media (min-width: 768px) {
  .hero h1 {
    font-size: 3rem;
  }
}

@media (min-width: 1024px) {
  .hero h1 {
    font-size: 3.5rem;
  }
}

.hero p {
  font-size: 1.125rem;
  color: #475569;
}

.hero-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
  margin-top: var(--spacing-6);
}

@media (min-width: 768px) {
  .hero-buttons {
    flex-direction: row;
    justify-content: center;
  }
}

/* ============================================
   Form Elements
   ============================================ */

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-4);
}

label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--foreground);
}

input,
textarea,
select {
  padding: var(--spacing-2) var(--spacing-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: var(--input);
  color: var(--foreground);
  font-size: 1rem;
  font-family: var(--font-sans);
  transition: all 0.3s ease;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(236, 72, 153, 0.1);
}

textarea {
  min-height: 6rem;
  resize: vertical;
}

/* ============================================
   Grid Layouts
   ============================================ */

.grid-2 {
  display: grid;
  gap: var(--spacing-6);
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

.grid-3 {
  display: grid;
  gap: var(--spacing-6);
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.grid-4 {
  display: grid;
  gap: var(--spacing-6);
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ============================================
   Utilities
   ============================================ */

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

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

.text-right {
  text-align: right;
}

.mt-4 {
  margin-top: var(--spacing-4);
}

.mt-6 {
  margin-top: var(--spacing-6);
}

.mt-8 {
  margin-top: var(--spacing-8);
}

.mt-12 {
  margin-top: var(--spacing-12);
}

.mb-4 {
  margin-bottom: var(--spacing-4);
}

.mb-6 {
  margin-bottom: var(--spacing-6);
}

.mb-8 {
  margin-bottom: var(--spacing-8);
}

.mb-12 {
  margin-bottom: var(--spacing-12);
}

.gap-4 {
  gap: var(--spacing-4);
}

.gap-6 {
  gap: var(--spacing-6);
}

.gap-8 {
  gap: var(--spacing-8);
}

.max-w-3xl {
  max-width: 48rem;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.space-y-4 > * + * {
  margin-top: var(--spacing-4);
}

.space-y-6 > * + * {
  margin-top: var(--spacing-6);
}

.space-y-12 > * + * {
  margin-top: var(--spacing-12);
}

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

/* ============================================
   Responsive Media
   ============================================ */

@media (max-width: 767px) {
  .hide-mobile {
    display: none;
  }
}

@media (min-width: 768px) {
  .hide-desktop {
    display: none;
  }
}

/* ============================================
   Animations
   ============================================ */

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

@keyframes slideIn {
  from {
    transform: translateY(10px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.fade-in {
  animation: fadeIn 0.3s ease;
}

.slide-in {
  animation: slideIn 0.3s ease;
}

/* ============================================
   Comparison Tables
   ============================================ */

.comparison-table {
  display: grid;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-8);
}

.table-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4);
  border-bottom: 1px solid var(--border);
  padding-bottom: var(--spacing-4);
}

.table-row:first-child {
  margin-bottom: var(--spacing-4);
}

.table-label {
  font-weight: 600;
  color: var(--foreground);
}

.table-good {
  background-color: #f0fdf4;
  padding: var(--spacing-3);
  border-radius: var(--radius);
  color: #065f46;
}

@media (prefers-color-scheme: dark) {
  .table-good {
    background-color: rgba(16, 185, 129, 0.1);
    color: #10b981;
  }
}

.table-bad {
  background-color: #fef2f2;
  padding: var(--spacing-3);
  border-radius: var(--radius);
  color: #7f1d1d;
}

@media (prefers-color-scheme: dark) {
  .table-bad {
    background-color: rgba(239, 68, 68, 0.1);
    color: #ef4444;
  }
}

/* ============================================
   Legal Content
   ============================================ */

.legal-content {
  max-width: 48rem;
  margin: var(--spacing-12) auto;
  padding: 0 var(--spacing-4);
}

.legal-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: var(--spacing-8);
  margin-bottom: var(--spacing-3);
}

.legal-content h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-top: var(--spacing-6);
  margin-bottom: var(--spacing-2);
}

.legal-content p {
  margin-bottom: var(--spacing-4);
  text-align: justify;
}

.legal-content ul,
.legal-content ol {
  margin-bottom: var(--spacing-4);
  padding-left: var(--spacing-6);
}

.legal-content li {
  margin-bottom: var(--spacing-2);
}

.legal-content li::before {
  content: none;
}

.legal-content ol li {
  display: list-item;
  list-style: decimal;
}

.legal-content ul li {
  display: list-item;
  list-style: disc;
  margin-left: var(--spacing-4);
}

/* ============================================
   Service Cards
   ============================================ */

.service-card {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--spacing-6);
  transition: all 0.3s ease;
}

.service-card:hover {
  border-color: var(--primary);
  box-shadow: 0 10px 25px rgba(236, 72, 153, 0.1);
}

.service-header {
  margin-bottom: var(--spacing-4);
}

.service-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: var(--spacing-2);
}

@media (prefers-color-scheme: dark) {
  .service-title {
    color: #e2e8f0;
  }
}

.service-subtitle {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin-bottom: var(--spacing-3);
}

.service-price {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
}

.service-description {
  font-size: 1.0625rem; /* 同步正文字体大小 */
  color: #334155;
  margin-bottom: var(--spacing-4);
}

.service-section {
  margin-bottom: var(--spacing-4);
}

.service-section-title {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--muted-foreground);
  margin-bottom: var(--spacing-2);
}

.service-list {
  list-style: none;
  padding: 0;
}

.service-list li {
  font-size: 0.9375rem; /* 从 0.875rem 放大 */
  padding: var(--spacing-2) 0;
  color: #334155; /* 加深颜色 */
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

@media (prefers-color-scheme: dark) {
  .service-list li {
    color: #cbd5e1;
  }
}

.service-list li.included::before {
  content: "✓";
  color: #10b981;
  font-weight: bold;
  flex-shrink: 0;
}

.service-list li.excluded::before {
  content: "✕";
  color: #ef4444;
  font-weight: bold;
  flex-shrink: 0;
}

.service-time {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  padding-top: var(--spacing-4);
  border-top: 1px solid var(--border);
  margin-top: var(--spacing-4);
}

/* ============================================
   Process Steps
   ============================================ */

.process-steps {
  display: grid;
  gap: var(--spacing-6);
  grid-template-columns: 1fr;
  margin-bottom: var(--spacing-12);
}

@media (min-width: 768px) {
  .process-steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .process-steps {
    grid-template-columns: repeat(6, 1fr);
  }
}

.process-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background-color: var(--primary);
  color: white;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-3);
}

.step-title {
  font-size: 1rem;
  font-weight: 600;
  color: #0f172a;
  margin-bottom: var(--spacing-2);
}

@media (prefers-color-scheme: dark) {
  .step-title {
    color: #e2e8f0;
  }
}

.step-description {
  font-size: 0.9375rem; /* 从 0.875rem 放大 */
  color: #334155;
}

@media (prefers-color-scheme: dark) {
  .step-description {
    color: #cbd5e1;
  }
}

/* ============================================
   Contact Info
   ============================================ */

.contact-info-item {
  display: flex;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-6);
}

.contact-icon {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius);
  background-color: rgba(236, 72, 153, 0.1);
  color: var(--primary);
  flex-shrink: 0;
}

.contact-icon svg {
  width: 1.25rem;
  height: 1.25rem;
}

.contact-content h3 {
  margin-bottom: var(--spacing-1);
}

.contact-content p {
  margin-bottom: 0;
  white-space: pre-wrap;
}

.contact-content a {
  display: block;
}

/* ============================================
   Help Topics
   ============================================ */

.help-topics {
  display: grid;
  gap: var(--spacing-6);
  grid-template-columns: 1fr;
  margin-top: var(--spacing-8);
}

@media (min-width: 768px) {
  .help-topics {
    grid-template-columns: repeat(3, 1fr);
  }
}

.help-topic {
  padding: var(--spacing-4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.3s ease;
}

.help-topic:hover {
  border-color: var(--primary);
  box-shadow: 0 5px 15px rgba(236, 72, 153, 0.1);
}

.help-topic-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius);
  background-color: rgba(236, 72, 153, 0.1);
  color: var(--primary);
  margin-bottom: var(--spacing-3);
}

.help-topic-icon svg {
  width: 1.25rem;
  height: 1.25rem;
}

.help-topic h3 {
  margin-bottom: var(--spacing-2);
  font-size: 1rem;
}

.help-topic p {
  font-size: 0.9375rem; /* 从 0.875rem 放大 */
  margin-bottom: 0;
  color: #334155; /* 加深颜色 */
}

@media (prefers-color-scheme: dark) {
  .help-topic p {
    color: #cbd5e1;
  }
}

/* Print Styles */
@media print {
  header,
  footer,
  .hide-print {
    display: none;
  }

  body {
    background: white;
    color: black;
  }
}