/* ============================================
   EASYE2E — Apple-Inspired Light Design System
   2026
   ============================================ */

/* --- CSS Variables --- */
:root {
  --bg-white: #FFFFFF;
  --bg-gray: #F5F5F7;
  --text-primary: #1D1D1F;
  --text-secondary: #86868B;
  --text-tertiary: #AFAFB2;
  --accent: #0071E3;
  --accent-hover: #0077ED;
  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.12);

  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-pill: 980px;

  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.08);
  --shadow-nav: 0 1px 0 rgba(0, 0, 0, 0.08);

  --container-max: 1080px;
  --container-wide: 1200px;
  --header-height: 52px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-white);
  color: var(--text-primary);
  line-height: 1.5;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: var(--accent-hover);
}

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.container-wide {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 120px 0;
}

.section-gray {
  background: var(--bg-gray);
}

/* --- Text Utilities --- */
.text-center { text-align: center; }
.text-secondary { color: var(--text-secondary); }

.section-eyebrow {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  line-height: 1.08;
}

.section-title-sm {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
  line-height: 1.1;
}

.section-desc {
  font-size: 19px;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 600px;
}

.section-desc.centered {
  margin: 0 auto;
}

.section-header {
  margin-bottom: 72px;
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 17px;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.nav-brand:hover {
  color: var(--text-primary);
}
.nav-brand img,
.nav-logo {
  height: 24px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}
.nav-links a:hover {
  color: var(--text-primary);
  background: rgba(0, 0, 0, 0.04);
}
.nav-links a.active {
  color: var(--text-primary);
  font-weight: 600;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--bg-gray);
  border-radius: var(--radius-pill);
  padding: 3px;
  font-size: 12px;
  font-weight: 600;
}
.lang-switch button {
  padding: 4px 12px;
  border: none;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: var(--font-sans);
}
.lang-switch button.active {
  background: var(--bg-white);
  color: var(--text-primary);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.nav-toggle.active span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ============================================
   HERO — Full Screen Apple Product Style
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--header-height) + 60px) 24px 100px;
}

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

.hero-eyebrow {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.hero-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 20px;
  white-space: nowrap;
}

.hero-subtitle {
  font-size: 21px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 36px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

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

/* --- Page Hero (inner pages, shorter) --- */
.page-hero {
  padding: calc(var(--header-height) + 80px) 24px 80px;
  text-align: center;
}

.page-hero .hero-title {
  font-size: clamp(36px, 5vw, 56px);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 28px;
  border: none;
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  line-height: 1.4;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: scale(1.02);
}

.btn-secondary {
  background: transparent;
  color: var(--accent);
  padding: 12px 8px;
}
.btn-secondary:hover {
  color: var(--accent-hover);
}
.btn-secondary::after {
  content: '\203A';
  font-size: 18px;
  line-height: 1;
  transition: transform 0.2s ease;
}
.btn-secondary:hover::after {
  transform: translateX(3px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border-strong);
}
.btn-outline:hover {
  background: var(--text-primary);
  color: var(--bg-white);
  border-color: var(--text-primary);
}

/* ============================================
   STATS SECTION
   ============================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-item {
  padding: 40px 16px;
}

.stat-number {
  font-size: 56px;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ============================================
   CARDS
   ============================================ */
.card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  border: 1px solid var(--border);
  transition: all 0.3s var(--ease-out);
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--bg-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 22px;
}

.card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.cards-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.cards-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

/* --- Card on gray bg --- */
.section-gray .card {
  background: var(--bg-white);
  border-color: transparent;
  box-shadow: var(--shadow-card);
}

/* ============================================
   SPLIT SECTION (image + text alternating)
   ============================================ */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-bottom: 100px;
}
.split:last-child {
  margin-bottom: 0;
}
.split.reverse {
  direction: rtl;
}
.split.reverse > * {
  direction: ltr;
}

.split-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-gray);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
}
.split-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

/* Placeholder for images with icon */
.split-image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 64px;
  color: var(--text-tertiary);
  background: linear-gradient(135deg, #F5F5F7 0%, #E8E8ED 100%);
  border-radius: var(--radius-lg);
}

.split-text .section-eyebrow {
  margin-bottom: 12px;
}

.split-text h3 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.split-text p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.split-text p:last-child {
  margin-bottom: 0;
}

/* ============================================
   FULL-WIDTH TEXT SECTION (Brand Statement)
   ============================================ */
.brand-statement {
  padding: 140px 24px;
  text-align: center;
}

.brand-statement-text {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  max-width: 800px;
  margin: 0 auto 24px;
}

.brand-statement-sub {
  font-size: 19px;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 580px;
  margin: 0 auto;
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
  padding: 100px 24px;
  text-align: center;
  background: var(--bg-gray);
}

.cta-section h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 12px;
}

.cta-section p {
  font-size: 19px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

/* ============================================
   TIMELINE
   ============================================ */
.timeline {
  position: relative;
  padding-left: 36px;
  max-width: 600px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--border-strong);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
}
.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -42px;
  top: 8px;
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
  border: 2px solid var(--bg-white);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.12);
}

.timeline-item h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.timeline-item p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================
   CREDENTIALS / BADGES
   ============================================ */
.credentials-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}

.credential-item {
  padding: 36px 20px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: all 0.3s var(--ease-out);
}

.credential-item:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.credential-number {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
  letter-spacing: -0.03em;
}

.credential-label {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ============================================
   TECH TAGS
   ============================================ */
.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.tech-tag {
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-white);
  border: 1px solid var(--border);
  transition: all 0.2s ease;
}

.tech-tag:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(0, 113, 227, 0.04);
}

/* ============================================
   JOB LISTINGS
   ============================================ */
.job-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
  margin-bottom: 12px;
}
.job-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-1px);
}

.job-info h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.job-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.job-tag {
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-gray);
}

.job-arrow {
  font-size: 18px;
  color: var(--text-tertiary);
  transition: all 0.2s ease;
  flex-shrink: 0;
}
.job-card:hover .job-arrow {
  color: var(--accent);
  transform: translateX(3px);
}

.job-detail {
  display: none;
  padding: 0 32px 28px;
  animation: fadeSlideDown 0.3s ease;
}
.job-detail.active {
  display: block;
}
.job-detail p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  white-space: pre-line;
}

/* ============================================
   CONTACT
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.contact-card {
  padding: 40px 36px;
}

.contact-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.contact-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.contact-card a {
  color: var(--accent);
}

.contact-icon {
  font-size: 28px;
  margin-bottom: 16px;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background: var(--bg-gray);
  border-top: 1px solid var(--border);
  padding: 56px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-brand h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}
.footer-brand p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 4px;
}

.footer-col h5 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
}
.footer-col li {
  margin-bottom: 10px;
}
.footer-col a {
  font-size: 13px;
  color: var(--text-secondary);
}
.footer-col a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-tertiary);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeSlideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal.delay-1 { transition-delay: 0.1s; }
.reveal.delay-2 { transition-delay: 0.2s; }
.reveal.delay-3 { transition-delay: 0.3s; }
.reveal.delay-4 { transition-delay: 0.4s; }

/* ============================================
   MOBILE NAV OVERLAY
   ============================================ */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 999;
  padding: 32px 24px;
  flex-direction: column;
  gap: 8px;
}
.mobile-nav.active {
  display: flex;
}
.mobile-nav a {
  display: block;
  padding: 14px 0;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
}
.mobile-nav a:last-child {
  border-bottom: none;
}
.mobile-nav .lang-switch {
  margin-top: 16px;
  align-self: flex-start;
}