/* ==========================================================================
   深圳市阿方索智能商贸有限公司 - 官方网站设计系统
   Shenzhen Afanso Intelligent Commerce Co., Ltd. - Corporate Portal CSS
   ========================================================================== */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Brand Colors */
  --color-primary: #0284c7;        /* Sky 600 */
  --color-primary-light: #38bdf8;  /* Sky 400 */
  --color-primary-dark: #0369a1;   /* Sky 700 */
  
  --color-accent: #10b981;         /* Emerald 500 */
  --color-accent-light: #34d399;   /* Emerald 400 */
  
  --color-dark-bg: #0b132b;        /* Deep Space Navy */
  --color-dark-card: #1c2541;      /* Tech Card Blue */
  --color-dark-border: #2e3c63;
  
  --color-surface: #ffffff;
  --color-surface-subtle: #f8fafc; /* Slate 50 */
  --color-surface-card: #ffffff;
  --color-border: #e2e8f0;         /* Slate 200 */
  --color-border-hover: #cbd5e1;   /* Slate 300 */
  
  --color-text-main: #0f172a;      /* Slate 900 */
  --color-text-muted: #475569;     /* Slate 600 */
  --color-text-subtle: #94a3b8;    /* Slate 400 */
  --color-text-inverse: #f8fafc;
  
  --color-error: #ef4444;
  --color-error-bg: #fef2f2;
  --color-success: #10b981;
  --color-success-bg: #ecfdf5;

  /* Elevation Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.05);
  --shadow-glow: 0 0 25px -5px rgba(14, 165, 233, 0.35);

  /* Layout */
  --container-max: 1240px;
  --header-height: 76px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  font-family: var(--font-sans);
  color: var(--color-text-main);
  background-color: var(--color-surface);
  line-height: 1.6;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background: 
    radial-gradient(circle at 10% 20%, rgba(14, 165, 233, 0.03) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(16, 185, 129, 0.03) 0%, transparent 40%),
    #ffffff;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button, input, select, textarea {
  font: inherit;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Typography Helpers */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  letter-spacing: 0.025em;
}

.badge-tech {
  background: rgba(2, 132, 199, 0.1);
  color: var(--color-primary);
  border: 1px solid rgba(2, 132, 199, 0.25);
}

.badge-emerald {
  background: rgba(16, 185, 129, 0.1);
  color: #059669;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.section-tagline {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-text-main);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-description {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 680px;
  margin-bottom: 48px;
}

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

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

/* Gradient Texts */
.gradient-text-sky {
  background: linear-gradient(135deg, #0284c7 0%, #0ea5e9 50%, #10b981 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-text-light {
  background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo-img {
  height: 44px;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-muted);
  position: relative;
  padding: 8px 0;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: width var(--transition-normal);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Modern Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #0369a1 0%, #075985 100%);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(2, 132, 199, 0.45);
}

.btn-secondary {
  background: #ffffff;
  color: var(--color-text-main);
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--color-surface-subtle);
  border-color: var(--color-border-hover);
  transform: translateY(-1px);
}

.btn-glow {
  background: linear-gradient(135deg, #0ea5e9 0%, #10b981 100%);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(16, 185, 129, 0.35);
}

.btn-glow:hover {
  filter: brightness(1.08);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(16, 185, 129, 0.45);
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--color-text-main);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero-section {
  position: relative;
  padding-top: 56px;
  padding-bottom: 72px;
  overflow: hidden;
  background: 
    radial-gradient(ellipse at 80% 20%, rgba(14, 165, 233, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 20% 90%, rgba(16, 185, 129, 0.06) 0%, transparent 50%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  align-items: center;
  gap: 48px;
}

.hero-content {
  max-width: 620px;
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.025em;
  color: var(--color-text-main);
  margin-top: 16px;
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 1.1875rem;
  line-height: 1.65;
  color: var(--color-text-muted);
  margin-bottom: 32px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}

.hero-stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding-top: 28px;
  border-top: 1px solid var(--color-border);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-size: 1.875rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  letter-spacing: -0.02em;
  font-family: var(--font-sans);
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  font-weight: 500;
  margin-top: 2px;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-visual-img {
  width: 100%;
  max-width: 620px;
  height: auto;
  border-radius: var(--radius-lg);
  filter: drop-shadow(0 20px 30px rgba(15, 23, 42, 0.12));
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

/* ==========================================================================
   Trust / Partners Banner
   ========================================================================== */

.trust-banner {
  padding: 32px 0;
  background: var(--color-surface-subtle);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.trust-header {
  text-align: center;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-text-subtle);
  text-transform: uppercase;
  margin-bottom: 20px;
}

.trust-marquee {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-wrap: wrap;
  gap: 32px;
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.trust-badge svg {
  color: var(--color-primary);
}

/* ==========================================================================
   About Us Section (关于我们 & 优势)
   ========================================================================== */

.section {
  padding: 88px 0;
  position: relative;
}

.section-alt {
  background-color: var(--color-surface-subtle);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.about-intro-text {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: 24px;
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}

.about-highlight-card {
  padding: 20px;
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.highlight-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.highlight-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.about-graphic-card {
  background: linear-gradient(145deg, #0b132b 0%, #1c2541 100%);
  border-radius: var(--radius-lg);
  padding: 40px;
  color: #ffffff;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.about-graphic-card::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.3) 0%, transparent 70%);
}

.about-card-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.about-card-title {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

.about-card-text {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: #cbd5e1;
  margin-bottom: 28px;
}

.values-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.value-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.value-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #38bdf8;
  margin-top: 8px;
  flex-shrink: 0;
}

/* ==========================================================================
   Core Business Section (核心业务)
   ========================================================================== */

.business-cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.biz-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.biz-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: transparent;
  transition: background var(--transition-fast);
}

.biz-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: #bae6fd;
}

.biz-card:hover::before {
  background: linear-gradient(90deg, #0284c7, #10b981);
}

.biz-icon-box {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: rgba(2, 132, 199, 0.08);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.biz-card:nth-child(2) .biz-icon-box {
  background: rgba(16, 185, 129, 0.08);
  color: #059669;
}
.biz-card:nth-child(3) .biz-icon-box {
  background: rgba(245, 158, 11, 0.08);
  color: #d97706;
}
.biz-card:nth-child(4) .biz-icon-box {
  background: rgba(99, 102, 241, 0.08);
  color: #4f46e5;
}

.biz-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 12px;
}

.biz-desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.biz-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.biz-tag {
  font-size: 0.75rem;
  padding: 3px 8px;
  background: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
}

/* ==========================================================================
   Smart Commerce Workflow (数智商贸全链路)
   ========================================================================== */

.workflow-section {
  background: linear-gradient(180deg, #0b132b 0%, #151e3f 100%);
  color: #ffffff;
  padding: 96px 0;
}

.workflow-section .section-title {
  color: #ffffff;
}

.workflow-section .section-description {
  color: #94a3b8;
}

.workflow-steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
  margin-top: 48px;
}

.workflow-step {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  backdrop-filter: blur(10px);
  position: relative;
  transition: all var(--transition-normal);
}

.workflow-step:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(56, 189, 248, 0.4);
  transform: translateY(-4px);
}

.step-num {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
  font-family: var(--font-mono);
  color: rgba(56, 189, 248, 0.35);
  margin-bottom: 12px;
}

.step-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #f8fafc;
}

.step-desc {
  font-size: 0.875rem;
  color: #94a3b8;
  line-height: 1.6;
}

/* ==========================================================================
   Global Network Section (全球辐射网络)
   ========================================================================== */

.network-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.region-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.region-card {
  padding: 20px;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.region-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.region-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.region-status {
  font-size: 0.6875rem;
  padding: 2px 6px;
  background: rgba(16, 185, 129, 0.15);
  color: #059669;
  border-radius: 4px;
}

.region-desc {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.network-features {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.network-feature-item {
  display: flex;
  gap: 16px;
}

.feature-icon-circle {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(2, 132, 199, 0.1);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feature-title {
  font-size: 1.0625rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.feature-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   FAQ Section (常见问题)
   ========================================================================== */

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item[open] {
  border-color: #93c5fd;
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-text-main);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  line-height: 1;
  font-weight: 400;
  color: var(--color-primary);
  transition: transform var(--transition-fast);
}

.faq-item[open] .faq-question::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 20px 24px;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   Contact & Lead Section
   ========================================================================== */

.contact-section {
  padding: 88px 0;
  background: 
    radial-gradient(circle at 10% 50%, rgba(2, 132, 199, 0.05) 0%, transparent 50%),
    #ffffff;
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
}

.contact-info-panel {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-card {
  padding: 24px;
  background: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: #ffffff;
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-card-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 4px;
}

.contact-card-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.contact-form-card {
  background: #ffffff;
  padding: 36px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-xl);
}

.form-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.form-subtitle {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

/* ==========================================================================
   Modern Form Styling (:user-valid, :user-invalid compliance)
   ========================================================================== */

.form-group {
  margin-bottom: 20px;
  position: relative;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 6px;
}

.form-hint {
  display: block;
  color: #64748b;
  font-size: 0.8125rem;
  margin-bottom: 4px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #ffffff;
  font-size: 0.9375rem;
  color: var(--color-text-main);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.18);
}

/* Modern Web Guidance: Validate input after interaction */
.form-input:user-invalid,
.form-select:user-invalid,
.form-textarea:user-invalid,
.form-input.user-invalid-fallback {
  border-color: var(--color-error);
  background-color: var(--color-error-bg);
}

.form-input:user-valid:not(:placeholder-shown),
.form-select:user-valid,
.form-textarea:user-valid:not(:placeholder-shown),
.form-input.user-valid-fallback {
  border-color: var(--color-success);
}

.error-msg {
  display: none;
  color: var(--color-error);
  font-size: 0.8125rem;
  margin-top: 4px;
  font-weight: 500;
}

.form-input:user-invalid + .error-msg,
.form-select:user-invalid + .error-msg,
.form-textarea:user-invalid + .error-msg,
.form-input.user-invalid-fallback + .error-msg {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ==========================================================================
   Native Modal Dialog Styling (Modern Web Guidance compliance)
   ========================================================================== */

/* MANDATORY: without these, scrolling over the backdrop or dialog chains to the page */
dialog:modal {
  overscroll-behavior: contain;
}

dialog::backdrop {
  overflow: hidden;
  overscroll-behavior: contain;
  background: rgba(11, 19, 43, 0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.modal-dialog {
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  padding: 0;
  max-width: 580px;
  width: calc(100% - 32px);
  background: #ffffff;
  color: var(--color-text-main);
  box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.25);
  margin: auto;
}

.modal-dialog[open] {
  animation: modalFadeIn 250ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
    transform: scale(0.96) translateY(8px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-header {
  padding: 24px 28px 16px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-text-main);
}

.modal-close-btn {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-text-subtle);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  color: var(--color-text-main);
  background: var(--color-surface-subtle);
}

.modal-body {
  padding: 24px 28px;
}

/* ==========================================================================
   Toast Notification
   ========================================================================== */

.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  background: #0f172a;
  color: #ffffff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.9375rem;
  transform: translateY(20px);
  opacity: 0;
  transition: all var(--transition-normal);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.toast-success {
  border-left: 4px solid var(--color-accent);
}

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

.site-footer {
  background: #0b132b;
  color: #cbd5e1;
  padding: 64px 0 32px;
  border-top: 1px solid #1e293b;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid #1e293b;
}

.footer-brand-desc {
  font-size: 0.875rem;
  color: #94a3b8;
  line-height: 1.7;
  margin-top: 16px;
  max-width: 320px;
}

.footer-title {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  font-size: 0.875rem;
  color: #94a3b8;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: #38bdf8;
}

.footer-qr-wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 12px;
}

.qr-code-img {
  width: 90px;
  height: 90px;
  border-radius: 8px;
  background: #ffffff;
  padding: 4px;
}

.qr-caption {
  font-size: 0.8125rem;
  color: #94a3b8;
  line-height: 1.5;
}

.footer-bottom {
  padding-top: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: #64748b;
  flex-wrap: wrap;
  gap: 16px;
}

.cf-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #94a3b8;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-content {
    max-width: 100%;
    margin: 0 auto;
  }
  .hero-cta-group {
    justify-content: center;
  }
  .hero-stats-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .business-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .workflow-steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .network-grid {
    grid-template-columns: 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }
  .hero-title {
    font-size: 2.25rem;
  }
  .section {
    padding: 60px 0;
  }
  .section-title {
    font-size: 1.875rem;
  }
  .about-grid {
    grid-template-columns: 1fr;
  }
  .business-cards-grid {
    grid-template-columns: 1fr;
  }
  .workflow-steps-grid {
    grid-template-columns: 1fr;
  }
  .region-cards {
    grid-template-columns: 1fr;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .mobile-toggle {
    display: block;
  }
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #ffffff;
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-xl);
    transform: translateY(-120%);
    opacity: 0;
    transition: all var(--transition-normal);
    pointer-events: none;
  }
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}