/* ========================================
   嘉联支付电签机 - 深橘棕低低风设计系统
   ======================================== */

/* CSS Variables */
:root {
  --jlp-brown: #9A3412;
  --jlp-brown-light: #C2410C;
  --jlp-brown-dark: #7C2D12;
  --rate-green: #22C55E;
  --rate-green-light: #4ADE80;
  --rate-green-dark: #16A34A;
  --low-blue: #3B82F6;
  --low-blue-light: #60A5FA;
  --low-blue-dark: #2563EB;
  --bg-page: #FFF7ED;
  --bg-card: #FFFFFF;
  --bg-section: #FFFBEB;
  --text-dark: #431407;
  --text-body: #334155;
  --text-muted: #64748B;
  --text-light: #94A3B8;
  --border-color: #E5E7EB;
  --shadow-sm: 0 1px 2px rgba(154, 52, 18, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(154, 52, 18, 0.1), 0 2px 4px -2px rgba(154, 52, 18, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(154, 52, 18, 0.1), 0 4px 6px -4px rgba(154, 52, 18, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(154, 52, 18, 0.1), 0 8px 10px -6px rgba(154, 52, 18, 0.1);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'DM Sans', 'Noto Sans SC', sans-serif;
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-dark);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

.text-green { color: var(--rate-green); }
.text-blue { color: var(--low-blue); }
.text-brown { color: var(--jlp-brown); }

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.container-sm {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: #FFFFFF;
  transition: box-shadow var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-lg);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--jlp-brown);
}

.navbar-brand svg {
  width: 36px;
  height: 36px;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.navbar-nav a {
  font-weight: 500;
  color: var(--text-body);
  transition: color var(--transition-fast);
  position: relative;
}

.navbar-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--rate-green);
  transition: width var(--transition-base);
}

.navbar-nav a:hover,
.navbar-nav a.active {
  color: var(--jlp-brown);
}

.navbar-nav a:hover::after,
.navbar-nav a.active::after {
  width: 100%;
}

.navbar-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  background: var(--rate-green);
  color: #FFFFFF;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.navbar-cta:hover {
  background: var(--rate-green-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Mobile Menu */
.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.navbar-toggle span {
  width: 24px;
  height: 2px;
  background: var(--jlp-brown);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.navbar-mobile {
  display: none;
  position: absolute;
  top: 72px;
  left: 0;
  right: 0;
  background: #FFFFFF;
  box-shadow: var(--shadow-lg);
  padding: 20px;
}

.navbar-mobile.active {
  display: block;
}

.navbar-mobile a {
  display: block;
  padding: 12px 0;
  font-weight: 500;
  color: var(--text-body);
  border-bottom: 1px solid var(--border-color);
}

.navbar-mobile a:last-child {
  border-bottom: none;
}

.navbar-mobile .mobile-cta {
  display: block;
  margin-top: 16px;
  padding: 14px 20px;
  background: var(--rate-green);
  color: #FFFFFF;
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-md);
}

@media (max-width: 768px) {
  .navbar-nav {
    display: none;
  }

  .navbar-toggle {
    display: flex;
  }
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--rate-green) 0%, var(--rate-green-dark) 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(34, 197, 94, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(34, 197, 94, 0.5);
}

.btn-secondary {
  background: transparent;
  color: #FFFFFF;
  border: 2px solid #FFFFFF;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
}

.btn-brown {
  background: linear-gradient(135deg, var(--jlp-brown) 0%, var(--jlp-brown-light) 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(154, 52, 18, 0.4);
}

.btn-brown:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(154, 52, 18, 0.5);
}

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

.btn-outline:hover {
  background: var(--jlp-brown);
  color: #FFFFFF;
}

.btn-lg {
  padding: 18px 36px;
  font-size: 1.125rem;
}

.btn-sm {
  padding: 10px 18px;
  font-size: 0.875rem;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  position: relative;
  padding: 160px 0 100px;
  background: linear-gradient(135deg, var(--jlp-brown) 0%, var(--jlp-brown-light) 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  color: #FFFFFF;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 20px;
  line-height: 1.1;
}

.hero-subtitle {
  font-size: 1.25rem;
  opacity: 0.9;
  margin-bottom: 40px;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-green {
  background: linear-gradient(135deg, var(--rate-green) 0%, var(--rate-green-dark) 100%);
}

.hero-blue {
  background: linear-gradient(135deg, var(--low-blue) 0%, var(--low-blue-dark) 100%);
}

.hero-sm {
  padding: 120px 0 60px;
}

.hero-sm .hero-title {
  font-size: 2.5rem;
}

@media (max-width: 768px) {
  .hero {
    padding: 140px 0 80px;
  }

  .hero-title {
    font-size: 2.25rem;
  }

  .hero-subtitle {
    font-size: 1.125rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-sm .hero-title {
    font-size: 1.875rem;
  }
}

/* ========================================
   Section
   ======================================== */
.section {
  padding: 80px 0;
}

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

.section-title {
  font-size: 2.25rem;
  text-align: center;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  text-align: center;
  max-width: 600px;
  margin: 0 auto 48px;
}

.section-header {
  margin-bottom: 48px;
}

/* ========================================
   Cards
   ======================================== */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.card-feature {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(154, 52, 18, 0.1) 0%, rgba(194, 65, 12, 0.1) 100%);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  color: var(--jlp-brown);
}

.card-icon.green {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.1) 0%, rgba(22, 163, 74, 0.1) 100%);
  color: var(--rate-green);
}

.card-icon.blue {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(37, 99, 235, 0.1) 100%);
  color: var(--low-blue);
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.card-text {
  color: var(--text-muted);
  line-height: 1.7;
}

.card-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 8px;
}

.card-number.green {
  color: var(--rate-green);
}

.card-number.blue {
  color: var(--low-blue);
}

.card-number.brown {
  color: var(--jlp-brown);
}

/* Staggered Cards */
.cards-staggered {
  display: grid;
  gap: 24px;
}

.cards-staggered-2 {
  grid-template-columns: 55% 43%;
}

.cards-staggered-3 {
  grid-template-columns: repeat(3, 1fr);
}

.cards-staggered-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 992px) {
  .cards-staggered-2 {
    grid-template-columns: 1fr;
  }

  .cards-staggered-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .cards-staggered-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .cards-staggered-3,
  .cards-staggered-4 {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   Feature Block
   ======================================== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-block.reverse {
  direction: rtl;
}

.feature-block.reverse > * {
  direction: ltr;
}

.feature-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.feature-content h3 {
  font-size: 1.75rem;
  margin-bottom: 16px;
}

.feature-content p {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.8;
}

@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .feature-block.reverse {
    direction: ltr;
  }
}

/* ========================================
   Table
   ======================================== */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  background: var(--bg-card);
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.table th {
  background: var(--bg-page);
  font-weight: 600;
  color: var(--text-dark);
  font-size: 1rem;
}

.table td {
  color: var(--text-body);
}

.table tr:last-child td {
  border-bottom: none;
}

.table tr:hover td {
  background: rgba(154, 52, 18, 0.02);
}

.table .highlight {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.08) 0%, rgba(22, 163, 74, 0.08) 100%);
}

.table .highlight td {
  font-weight: 600;
  color: var(--rate-green);
}

.table .check {
  color: var(--rate-green);
  font-size: 1.25rem;
}

.table .cross {
  color: var(--text-light);
  font-size: 1.25rem;
}

@media (max-width: 768px) {
  .table th,
  .table td {
    padding: 12px 16px;
    font-size: 0.875rem;
  }
}

/* ========================================
   FAQ
   ======================================== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-dark);
  text-align: left;
  transition: background var(--transition-fast);
}

.faq-question:hover {
  background: var(--bg-page);
}

.faq-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--jlp-brown);
  transition: transform var(--transition-base);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ========================================
   CTA Section
   ======================================== */
.cta-section {
  background: linear-gradient(135deg, var(--jlp-brown) 0%, var(--jlp-brown-light) 100%);
  padding: 80px 0;
  text-align: center;
  color: #FFFFFF;
}

.cta-section h2 {
  color: #FFFFFF;
  font-size: 2.25rem;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 1.125rem;
  opacity: 0.9;
  margin-bottom: 32px;
}

.cta-section .btn-primary {
  background: #FFFFFF;
  color: var(--jlp-brown);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
}

.cta-section .btn-primary:hover {
  background: #F9FAFB;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: linear-gradient(135deg, var(--jlp-brown) 0%, var(--jlp-brown-light) 100%);
  color: #FFFFFF;
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-text {
  opacity: 0.8;
  line-height: 1.7;
}

.footer-title {
  font-weight: 600;
  margin-bottom: 20px;
  font-size: 1.125rem;
}

.footer-links a {
  display: block;
  padding: 8px 0;
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

.footer-links a:hover {
  opacity: 1;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding: 24px 0;
  text-align: center;
  font-size: 0.875rem;
  opacity: 0.7;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    text-align: center;
  }

  .footer-brand {
    justify-content: center;
  }
}

/* ========================================
   Utility Classes
   ======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mt-5 { margin-top: 48px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.mb-5 { margin-bottom: 48px; }

.py-1 { padding-top: 8px; padding-bottom: 8px; }
.py-2 { padding-top: 16px; padding-bottom: 16px; }
.py-3 { padding-top: 24px; padding-bottom: 24px; }
.py-4 { padding-top: 32px; padding-bottom: 32px; }
.py-5 { padding-top: 48px; padding-bottom: 48px; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }
.gap-4 { gap: 32px; }

.grid { display: grid; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 768px) {
  .hide-mobile { display: none !important; }
}

@media (min-width: 769px) {
  .hide-desktop { display: none !important; }
}

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

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-fade-in {
  animation: fadeIn 0.4s ease forwards;
}

/* ========================================
   Form
   ======================================== */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-dark);
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  font-size: 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  font-family: inherit;
}

.form-input:focus {
  outline: none;
  border-color: var(--jlp-brown);
  box-shadow: 0 0 0 3px rgba(154, 52, 18, 0.1);
}

.form-input::placeholder {
  color: var(--text-light);
}

/* ========================================
   Highlight Box
   ======================================== */
.highlight-box {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.08) 0%, rgba(22, 163, 74, 0.08) 100%);
  border: 2px solid var(--rate-green);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.highlight-box.blue {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(37, 99, 235, 0.08) 100%);
  border-color: var(--low-blue);
}

.highlight-box.brown {
  background: linear-gradient(135deg, rgba(154, 52, 18, 0.08) 0%, rgba(194, 65, 12, 0.08) 100%);
  border-color: var(--jlp-brown);
}

/* ========================================
   Price Display
   ======================================== */
.price-display {
  font-family: var(--font-display);
  font-weight: 800;
}

.price-value {
  font-size: 4rem;
  line-height: 1;
}

.price-unit {
  font-size: 1.5rem;
  font-weight: 600;
}

/* ========================================
   Tag
   ======================================== */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  background: rgba(154, 52, 18, 0.1);
  color: var(--jlp-brown);
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 500;
}

.tag.green {
  background: rgba(34, 197, 94, 0.1);
  color: var(--rate-green);
}

.tag.blue {
  background: rgba(59, 130, 246, 0.1);
  color: var(--low-blue);
}

/* ========================================
   Divider
   ======================================== */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-color), transparent);
  margin: 48px 0;
}

/* ========================================
   Comparison Badge
   ======================================== */
.badge-recommended {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--rate-green);
  color: #FFFFFF;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ========================================
   Scarcity Banner
   ======================================== */
.scarcity-banner {
  background: linear-gradient(135deg, var(--jlp-brown-dark) 0%, var(--jlp-brown) 100%);
  color: #FFFFFF;
  padding: 16px 24px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-weight: 500;
  margin-bottom: 32px;
}

.scarcity-banner svg {
  flex-shrink: 0;
}

/* ========================================
   Stats Row
   ======================================== */
.stats-row {
  display: flex;
  justify-content: center;
  gap: 64px;
  flex-wrap: wrap;
}

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

.stat-value {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--rate-green);
  line-height: 1;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 8px;
}