/* 
 * Sihong Sishen Network Studio - Global Design System
 * Aesthetic: Handcrafted, Minimalist, Developer Artisan (No AI-clichés)
 */

:root {
  /* Colors */
  --bg-primary: #fcfbfa;       /* Warm cream white */
  --bg-secondary: #f5f3ef;     /* Warm light grey/sand */
  --text-primary: #1c1b1a;     /* Deep charcoal black */
  --text-secondary: #605d59;   /* Slate gray */
  --accent-color: #1e3f20;     /* Deep forest green (craftsman theme) */
  --accent-light: #e6ebe7;     /* Light green tint */
  --accent-gold: #b3863b;      /* Muted brass gold for highlights */
  --border-color: #dfdbd3;     /* Structural grid border */
  --border-focus: #1e3f20;
  --error-color: #b04b4b;
  --success-color: #2b704c;
  
  /* Fonts */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, SF Pro Text, Consolas, Monaco, monospace;
  
  /* Layout */
  --max-width: 1100px;
  --gap: 1.5rem;
}

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

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

/* Base Layout Framework (Modernist Grid style) */
.site-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header & Navigation */
header {
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(252, 251, 250, 0.9);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4.5rem;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-icon {
  width: 1.75rem;
  height: 1.75rem;
  color: var(--accent-color);
}

.logo-text {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.logo-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.15rem 0.4rem;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
}

nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

nav a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
  position: relative;
  padding: 0.25rem 0;
}

nav a:hover, nav a.active {
  color: var(--text-primary);
}

nav a.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-color);
}

.btn-nav-order {
  display: inline-block;
  padding: 0.4rem 1rem;
  border: 1.5px solid var(--accent-color);
  color: var(--accent-color) !important;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 4px;
  transition: all 0.2s ease;
}

.btn-nav-order:hover {
  background-color: var(--accent-color);
  color: var(--bg-primary) !important;
}

/* Mobile Menu Toggle (hidden on desktop) */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

/* Hero Section */
.hero {
  padding: 5rem 0 4rem;
  border-bottom: 1px solid var(--border-color);
  background-image: radial-gradient(var(--border-color) 1px, transparent 1px);
  background-size: 24px 24px;
}

.hero-content {
  max-width: 720px;
}

.hero-tag {
  font-family: var(--font-mono);
  color: var(--accent-gold);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
  display: inline-block;
}

.hero h1 {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 600px;
}

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

/* Grid Sections */
.grid-section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  margin-bottom: 3rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.section-title-wrap {
  max-width: 500px;
}

.section-subtitle {
  font-family: var(--font-mono);
  color: var(--accent-gold);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

/* Services Grid Layout */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  border: 1px solid var(--border-color);
  background-color: var(--border-color);
  gap: 1px;
}

.service-card {
  background-color: var(--bg-primary);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: background-color 0.2s ease;
}

.service-card:hover {
  background-color: #fdfdfd;
}

.service-icon-box {
  width: 2.5rem;
  height: 2.5rem;
  color: var(--accent-color);
  margin-bottom: 1.5rem;
}

.service-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.service-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.service-price {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-color);
  border-top: 1px dashed var(--border-color);
  padding-top: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.price-unit {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 400;
}

/* Business Intro Section (matching business scope) */
.scope-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.scope-intro p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
}

.scope-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.scope-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.scope-dot {
  width: 5px;
  height: 5px;
  background-color: var(--accent-gold);
  border-radius: 50%;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: var(--font-sans);
}

.btn-primary {
  background-color: var(--accent-color);
  color: var(--bg-primary);
  border: 1px solid var(--accent-color);
}

.btn-primary:hover {
  background-color: #142a15;
  border-color: #142a15;
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

/* Order Online Page Layout */
.order-layout {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 2.5rem;
  margin-top: 2rem;
}

.order-form-container {
  border: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  padding: 2rem;
  border-radius: 4px;
}

.order-summary-container {
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  padding: 2rem;
  border-radius: 4px;
  align-self: start;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: #ffffff;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--text-primary);
  transition: border-color 0.2s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--border-focus);
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23605d59' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1rem;
  padding-right: 2.5rem;
}

.service-select-card {
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 1rem;
  margin-bottom: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.service-select-card:hover {
  border-color: var(--text-secondary);
}

.service-select-card.selected {
  border-color: var(--accent-color);
  background-color: var(--accent-light);
}

.service-select-card input[type="radio"] {
  accent-color: var(--accent-color);
  width: 1.1rem;
  height: 1.1rem;
}

.service-select-info {
  flex-grow: 1;
  margin-left: 0.75rem;
}

.service-select-title {
  font-weight: 600;
  font-size: 0.95rem;
}

.service-select-price {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-color);
}

/* Order Summary */
.summary-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.summary-row.total {
  border-top: 1px dashed var(--border-color);
  padding-top: 1rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--accent-color);
}

.summary-payment-methods {
  margin: 1.5rem 0;
}

.payment-method-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.payment-options {
  display: flex;
  gap: 0.75rem;
}

.payment-option {
  flex: 1;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  cursor: pointer;
  background-color: #ffffff;
  transition: all 0.2s ease;
  font-weight: 600;
  font-size: 0.9rem;
}

.payment-option.selected {
  border-color: var(--accent-color);
  background-color: var(--accent-light);
}

.payment-logo {
  height: 1.2rem;
  width: auto;
}

/* Simulated Checkout Popup (Audit Key Scenario) */
.checkout-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(28, 27, 26, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.checkout-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.checkout-box {
  background-color: #ffffff;
  width: 100%;
  max-width: 440px;
  border-radius: 8px;
  padding: 2.5rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  position: relative;
  text-align: center;
}

.close-checkout {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-secondary);
}

.checkout-header {
  margin-bottom: 1.5rem;
}

.checkout-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: 0.5rem;
}

.checkout-amount {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-color);
  margin: 1rem 0;
}

.checkout-qr-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  background-color: var(--bg-secondary);
  border-radius: 6px;
  margin-bottom: 1.5rem;
}

.checkout-qr {
  width: 160px;
  height: 160px;
  margin-bottom: 1rem;
  background-color: #ffffff;
  border: 4px solid #ffffff;
}

.checkout-qr-tip {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.checkout-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.spinner {
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--border-color);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* About Us Layout */
.about-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3.5rem;
}

.about-info h3 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.about-info p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.license-box {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  border-radius: 4px;
}

.license-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.license-field {
  margin-bottom: 0.75rem;
  font-size: 0.9rem;
}

.license-label {
  color: var(--text-secondary);
  font-weight: 600;
}

.license-value {
  color: var(--text-primary);
}

/* Policy Pages (Terms, Privacy, Refund) */
.policy-container {
  max-width: 800px;
  margin: 3rem auto;
  padding: 0 1.5rem;
}

.policy-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
}

.policy-header h1 {
  font-size: 2rem;
  font-weight: 700;
}

.policy-meta {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.policy-content h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 2rem 0 1rem;
  color: var(--text-primary);
}

.policy-content p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
  line-height: 1.7;
}

.policy-content ul {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.policy-content li {
  margin-bottom: 0.5rem;
}

/* Footer Section */
footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 3rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  max-width: 360px;
}

.footer-links h5, .footer-contact h5 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

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

.footer-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--text-primary);
}

.footer-contact p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-copyright {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer-badges {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer-badge-icon {
  height: 1.1rem;
  width: auto;
  opacity: 0.55;
  transition: opacity 0.2s ease;
}

.footer-badge-icon:hover {
  opacity: 0.85;
}

/* Mobile Responsive Adjustments */
@media (max-width: 768px) {
  nav {
    display: none; /* In real application toggle via menu button or adaptively wrap */
  }
  
  .header-container {
    flex-wrap: wrap;
  }
  
  /* Simplify for mobile menu */
  nav.mobile-nav-active {
    display: flex;
    flex-direction: column;
    width: 100%;
    padding: 1rem 0;
    gap: 1rem;
    border-top: 1px solid var(--border-color);
  }
  
  .menu-toggle {
    display: block;
  }

  .hero {
    padding: 3rem 0;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  
  .scope-showcase {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .scope-list {
    grid-template-columns: 1fr;
  }
  
  .order-layout, .about-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}