/* ========================================
   飞澜外贸 (Feilan Trade) - Design System
   Aesthetic: Tech-forward, Global Commerce
   Tone: Professional, Trustworthy, Innovative
   ======================================== */

/* ----------------------------------------
   CSS Variables - Design Tokens
   ---------------------------------------- */
:root {
  /* Primary Palette - Brand Blue */
  --color-primary: #0a5fbc;
  --color-primary-light: #2a7fd6;
  --color-primary-dark: #0a2540;

  /* Accent - Brand Yellow/Gold for CTAs */
  --color-accent: #f19204;
  --color-accent-hover: #d97f04;
  --color-accent-dark: #c47003;

  /* Secondary - Keep for legacy compatibility, now brand yellow */
  --color-teal: #f19204;
  --color-teal-light: #f5a82e;
  --color-teal-dark: #d97f04;

  /* Neutrals */
  --color-white: #ffffff;
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;

  /* Semantic Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;

  /* Typography - Using distinctive fonts */
  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Font Sizes - Fluid Typography */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.6vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
  --text-3xl: clamp(1.875rem, 1.5rem + 1.875vw, 2.5rem);
  --text-4xl: clamp(2.25rem, 1.75rem + 2.5vw, 3.5rem);
  --text-5xl: clamp(3rem, 2rem + 5vw, 4.5rem);

  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;

  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  /* Letter Spacing */
  --tracking-tighter: -0.05em;
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;

  /* Spacing Scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows - Layered depth system */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  --shadow-glow: 0 0 40px rgb(0 212 170 / 0.15);
  --shadow-glow-accent: 0 0 40px rgb(255 107 74 / 0.2);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* Z-Index Scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;

  /* Container */
  --container-max: 1280px;
  --container-padding: var(--space-6);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--color-gray-800);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  color: var(--color-primary);
}

/* ----------------------------------------
   Typography Utilities
   ---------------------------------------- */
.text-display {
  font-family: var(--font-display);
}

.text-body {
  font-family: var(--font-body);
}

.text-mono {
  font-family: var(--font-mono);
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-teal) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.section {
  padding-top: var(--space-20);
  padding-bottom: var(--space-20);
}

.section--lg {
  padding-top: var(--space-32);
  padding-bottom: var(--space-32);
}

/* ----------------------------------------
   Navigation
   ---------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-gray-200);
  transition: all var(--transition-base);
}

.nav--scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-md);
}

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

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
}

.nav__logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-teal) 0%, var(--color-primary) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-weight: var(--font-extrabold);
  font-size: var(--text-lg);
}

.nav__logo-img {
  height: 44px;
  max-height: 44px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  position: relative;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-600);
  transition: color var(--transition-fast);
  padding: var(--space-2) 0;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-teal);
  transition: width var(--transition-base);
}

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

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

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav__lang {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-600);
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
}

.nav__lang:hover {
  background: var(--color-gray-200);
  color: var(--color-primary);
}

.nav__lang-icon {
  width: 16px;
  height: 16px;
}

/* Mobile Menu Toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle-line {
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  transform-origin: center;
}

.nav__toggle--active .nav__toggle-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle--active .nav__toggle-line:nth-child(2) {
  opacity: 0;
}

.nav__toggle--active .nav__toggle-line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.nav__mobile {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-white);
  padding: var(--space-6);
  transform: translateX(100%);
  transition: transform var(--transition-base);
}

.nav__mobile--open {
  transform: translateX(0);
}

.nav__mobile-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.nav__mobile-link {
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  color: var(--color-gray-700);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-gray-200);
}

/* ----------------------------------------
   Buttons
   ---------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  line-height: 1;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgb(255 107 74 / 0.35);
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgb(255 107 74 / 0.4);
}

.btn--secondary {
  background: var(--color-white);
  color: var(--color-primary);
  border: 1px solid var(--color-gray-300);
}

.btn--secondary:hover {
  background: var(--color-gray-50);
  border-color: var(--color-gray-400);
  transform: translateY(-2px);
}

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

.btn--ghost:hover {
  background: var(--color-gray-100);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-xl);
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn__icon {
  width: 18px;
  height: 18px;
}

/* ----------------------------------------
   Hero Section
   ---------------------------------------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 50%, rgba(0, 212, 170, 0.05) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 80%;
  height: 150%;
  background: radial-gradient(ellipse at center, rgba(0, 212, 170, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 60%;
  height: 100%;
  background: radial-gradient(ellipse at center, rgba(255, 107, 74, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero__content {
  max-width: 600px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(0, 212, 170, 0.1);
  color: var(--color-teal-dark);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
  animation: fadeInUp 0.6s ease-out;
}

.hero__badge-dot {
  width: 8px;
  height: 8px;
  background: var(--color-teal);
  border-radius: var(--radius-full);
  animation: pulse 2s ease-in-out infinite;
}

.hero__title {
  font-size: var(--text-5xl);
  font-weight: var(--font-extrabold);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-6);
  animation: fadeInUp 0.6s ease-out 0.1s backwards;
}

.hero__title-highlight {
  color: var(--color-teal);
}

.hero__subtitle {
  font-size: var(--text-xl);
  color: var(--color-gray-600);
  margin-bottom: var(--space-8);
  animation: fadeInUp 0.6s ease-out 0.2s backwards;
}

.hero__values {
  display: flex;
  gap: var(--space-6);
  margin-bottom: var(--space-10);
  animation: fadeInUp 0.6s ease-out 0.3s backwards;
}

.hero__value {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.hero__value-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  color: var(--color-teal);
}

.hero__value-text {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-700);
}

.hero__cta {
  display: flex;
  gap: var(--space-4);
  animation: fadeInUp 0.6s ease-out 0.4s backwards;
}

.hero__visual {
  position: relative;
  animation: fadeInRight 0.8s ease-out 0.3s backwards;
}

.hero__image-wrapper {
  position: relative;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-2xl);
  background: var(--color-white);
}

.hero__image {
  width: 100%;
  height: auto;
}

.hero__floating-card {
  position: absolute;
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-4);
  box-shadow: var(--shadow-xl);
  animation: float 3s ease-in-out infinite;
}

.hero__floating-card--1 {
  top: 10%;
  left: -10%;
  animation-delay: 0s;
}

.hero__floating-card--2 {
  bottom: 15%;
  right: -8%;
  animation-delay: 1.5s;
}

/* ----------------------------------------
   Pain Points Section
   ---------------------------------------- */
.pain-points {
  background: var(--color-primary);
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.pain-points::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(0, 212, 170, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(255, 107, 74, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.pain-points__header {
  text-align: center;
  margin-bottom: var(--space-16);
  position: relative;
  z-index: 1;
}

.pain-points__title {
  color: var(--color-white);
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
}

.pain-points__subtitle {
  font-size: var(--text-lg);
  color: var(--color-gray-300);
  max-width: 600px;
  margin: 0 auto;
}

.pain-points__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  position: relative;
  z-index: 1;
}

.pain-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
}

.pain-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(0, 212, 170, 0.3);
  transform: translateY(-4px);
}

.pain-card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-6);
  color: var(--color-white);
}

.pain-card__title {
  color: var(--color-white);
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

.pain-card__desc {
  color: var(--color-gray-300);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
}

/* ----------------------------------------
   Flow Section
   ---------------------------------------- */
.flow {
  background: var(--color-gray-50);
  position: relative;
}

.flow__header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.flow__title {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
}

.flow__subtitle {
  font-size: var(--text-lg);
  color: var(--color-gray-600);
}

.flow__diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.flow__step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-6);
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  min-width: 160px;
  transition: all var(--transition-base);
}

.flow__step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.flow__step-number {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-teal);
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.flow__step-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-gray-100);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-4);
  color: var(--color-primary);
}

.flow__step-title {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-primary);
}

.flow__arrow {
  color: var(--color-gray-400);
  flex-shrink: 0;
}

/* ----------------------------------------
   Architecture Section
   ---------------------------------------- */
.architecture {
  background: var(--color-white);
}

.architecture__header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.architecture__title {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
}

.architecture__subtitle {
  font-size: var(--text-lg);
  color: var(--color-gray-600);
}

.architecture__diagram {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 900px;
  margin: 0 auto var(--space-12);
}

.arch-layer {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-6);
  background: var(--color-gray-50);
  border-radius: var(--radius-xl);
  border-left: 4px solid var(--color-teal);
  transition: all var(--transition-base);
}

.arch-layer:hover {
  background: var(--color-white);
  box-shadow: var(--shadow-lg);
  transform: translateX(4px);
}

.arch-layer:nth-child(2) {
  border-left-color: var(--color-accent);
}

.arch-layer:nth-child(3) {
  border-left-color: var(--color-info);
}

.arch-layer:nth-child(4) {
  border-left-color: var(--color-success);
}

.arch-layer:nth-child(5) {
  border-left-color: var(--color-warning);
}

.arch-layer__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  flex-shrink: 0;
}

.arch-layer__content {
  flex: 1;
}

.arch-layer__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}

.arch-layer__desc {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
}

.architecture__cta {
  text-align: center;
}

/* ----------------------------------------
   CTA Section
   ---------------------------------------- */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(0, 212, 170, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 80%, rgba(255, 107, 74, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.cta-section__inner {
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin: 0 auto;
}

.cta-section__title {
  color: var(--color-white);
  font-size: var(--text-4xl);
  margin-bottom: var(--space-6);
}

.cta-section__subtitle {
  font-size: var(--text-lg);
  color: var(--color-gray-300);
  margin-bottom: var(--space-10);
}

.cta-section__buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
}

.cta-section .btn--secondary {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.3);
}

.cta-section .btn--secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
}

/* ----------------------------------------
   Footer
   ---------------------------------------- */
.footer {
  background: var(--color-gray-900);
  color: var(--color-gray-400);
  padding: var(--space-16) 0 var(--space-8);
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer__brand {
  max-width: 280px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.footer__logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-teal) 0%, var(--color-primary-light) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-weight: var(--font-extrabold);
  font-size: var(--text-lg);
}

.footer__logo-img {
  height: 48px;
  width: auto;
  max-width: 200px;
  object-fit: contain;
}

.footer__desc {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

.footer__social {
  display: flex;
  gap: var(--space-3);
}

.footer__social-link {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-gray-800);
  border-radius: var(--radius-md);
  color: var(--color-gray-400);
  transition: all var(--transition-fast);
}

.footer__social-link:hover {
  background: var(--color-teal);
  color: var(--color-white);
}

.footer__column-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  margin-bottom: var(--space-6);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__link {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-teal);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-gray-800);
  font-size: var(--text-sm);
}

.footer__legal {
  display: flex;
  gap: var(--space-6);
}

/* ----------------------------------------
   Floating Action Buttons
   ---------------------------------------- */
.fab-group {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  z-index: var(--z-fixed);
}

.fab {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-lg);
  position: relative;
}

.fab--wechat {
  background: #07c160;
  color: var(--color-white);
}

.fab--wechat:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-xl);
}

.fab--demo {
  background: var(--color-accent);
  color: var(--color-white);
}

.fab--demo:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-xl), var(--shadow-glow-accent);
}

.fab__icon {
  width: 24px;
  height: 24px;
}

.fab__qr {
  position: absolute;
  bottom: 0;
  right: calc(100% + var(--space-4));
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-4);
  box-shadow: var(--shadow-2xl);
  opacity: 0;
  visibility: hidden;
  transform: translateX(10px);
  transition: all var(--transition-base);
  white-space: nowrap;
}

.fab--wechat:hover .fab__qr,
.fab__qr--visible {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

.fab__qr-image {
  width: 160px;
  height: 160px;
  background: var(--color-gray-200);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
}

.fab__qr-image img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  border-radius: inherit;
}

.fab__qr-text {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  text-align: center;
}

/* ----------------------------------------
   Product Page - Tabs
   ---------------------------------------- */
.product-tabs {
  background: var(--color-gray-50);
}

.tabs__nav {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-12);
  flex-wrap: wrap;
}

.tabs__btn {
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-600);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tabs__btn:hover {
  color: var(--color-primary);
  border-color: var(--color-gray-300);
}

.tabs__btn--active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.tabs__content {
  display: none;
  animation: fadeIn 0.4s ease-out;
}

.tabs__content--active {
  display: block;
}

.tab-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.tab-panel__content {
  padding-right: var(--space-8);
}

.tab-panel__position {
  font-size: var(--text-lg);
  color: var(--color-teal);
  font-weight: var(--font-medium);
  margin-bottom: var(--space-4);
}

.tab-panel__title {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-6);
}

.tab-panel__features {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.tab-panel__feature {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.tab-panel__feature-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-teal);
  background: linear-gradient(135deg, var(--color-teal) 0%, var(--color-teal-dark) 100%);
  border-radius: var(--radius-md);
  color: var(--color-white);
  flex-shrink: 0;
}

.tab-panel__feature-content h4 {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}

.tab-panel__feature-content p {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
}

.tab-panel__output {
  padding: var(--space-4);
  background: linear-gradient(135deg, rgba(0, 212, 170, 0.1) 0%, rgba(0, 212, 170, 0.05) 100%);
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--color-teal);
}

.tab-panel__output p {
  font-size: var(--text-base);
  color: var(--color-gray-700);
  font-weight: var(--font-medium);
}

.tab-panel__image {
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  background: var(--color-white);
}

.tab-panel__image img {
  width: 100%;
  height: auto;
}

/* ----------------------------------------
   Service Page
   ---------------------------------------- */
.service-hero {
  background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 100%);
  text-align: center;
}

.service-hero__title {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
}

.service-hero__subtitle {
  font-size: var(--text-xl);
  color: var(--color-gray-600);
  max-width: 600px;
  margin: 0 auto;
}

.delivery-flow {
  background: var(--color-white);
}

.delivery-flow__header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.delivery-flow__title {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
}

.delivery-flow__steps {
  display: flex;
  justify-content: space-between;
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
}

.delivery-flow__steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 60px;
  right: 60px;
  height: 2px;
  background: var(--color-gray-200);
}

.delivery-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  z-index: 1;
  flex: 1;
}

.delivery-step__number {
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-white);
  border: 3px solid var(--color-teal);
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-teal);
  margin-bottom: var(--space-6);
  transition: all var(--transition-base);
}

.delivery-step:hover .delivery-step__number {
  background: var(--color-teal);
  color: var(--color-white);
}

.delivery-step__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-2);
}

.delivery-step__desc {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  max-width: 150px;
}

.service-content {
  background: var(--color-gray-50);
}

.service-content__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.service-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

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

.service-card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-teal) 0%, var(--color-teal-dark) 100%);
  border-radius: var(--radius-xl);
  color: var(--color-white);
  margin-bottom: var(--space-6);
}

.service-card__title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

.service-card__desc {
  font-size: var(--text-base);
  color: var(--color-gray-600);
  line-height: var(--leading-relaxed);
}

/* ----------------------------------------
   About Page
   ---------------------------------------- */
.about-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  text-align: center;
}

.about-hero__title {
  color: var(--color-white);
  font-size: var(--text-4xl);
  margin-bottom: var(--space-6);
}

.about-hero__desc {
  font-size: var(--text-xl);
  color: var(--color-gray-300);
  max-width: 700px;
  margin: 0 auto;
  line-height: var(--leading-relaxed);
}

.about-content {
  background: var(--color-white);
}

.about-content__grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-16);
}

.capability-card {
  text-align: center;
  padding: var(--space-6);
  background: var(--color-gray-50);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

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

.capability-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-teal);
  border-radius: var(--radius-lg);
  color: var(--color-white);
  margin: 0 auto var(--space-4);
}

.capability-card__title {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
}

/* Contact Form */
.contact-section {
  background: var(--color-gray-50);
}

.contact-section__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.contact-info__title {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-6);
}

.contact-info__desc {
  font-size: var(--text-lg);
  color: var(--color-gray-600);
  margin-bottom: var(--space-8);
  line-height: var(--leading-relaxed);
}

.contact-info__items {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact-info__item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.contact-info__item-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  color: var(--color-teal);
}

.contact-info__item-content {
  font-size: var(--text-base);
}

.contact-info__item-label {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--space-1);
}

.contact-form {
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  box-shadow: var(--shadow-xl);
}

.contact-form__title {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-8);
}

.form-group {
  margin-bottom: var(--space-6);
}

.form-group__label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-700);
  margin-bottom: var(--space-2);
}

.form-group__input,
.form-group__textarea {
  width: 100%;
  padding: var(--space-4);
  font-size: var(--text-base);
  color: var(--color-gray-800);
  background: var(--color-gray-50);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.form-group__input:focus,
.form-group__textarea:focus {
  outline: none;
  border-color: var(--color-teal);
  background: var(--color-white);
  box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.1);
}

.form-group__textarea {
  min-height: 120px;
  resize: vertical;
}

.contact-form__submit {
  width: 100%;
}

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

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

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

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

/* Scroll animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }