/* =========================================================
   ETINM 宜天美科技 — site.css
   Design: deep-navy tech with electric blue + cyan accents
   ========================================================= */

/* ---------- CSS Design Tokens ---------- */
:root {
  --c-navy:       #0b1120;
  --c-navy-mid:   #111827;
  --c-card-bg:    #161f30;
  --c-blue:       #2563eb;
  --c-blue-light: #3b82f6;
  --c-cyan:       #22d3ee;
  --c-cyan-light: #67e8f9;
  --c-white:      #f0f6ff;
  --c-muted:      #94a3b8;
  --c-border:     rgba(255,255,255,0.07);
  --c-glow:       rgba(37,99,235,0.35);

  --grad-brand: linear-gradient(135deg, var(--c-blue) 0%, var(--c-cyan) 100%);
  --grad-hero:  linear-gradient(160deg, #0b1120 0%, #0f2044 55%, #071a38 100%);

  --font-display: 'Syne', sans-serif;
  --font-body:    'Noto Sans SC', sans-serif;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;

  --shadow-card: 0 4px 24px rgba(0,0,0,0.35);
  --shadow-glow: 0 0 40px var(--c-glow);
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-white);
  background: var(--c-navy);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.25;
  font-weight: 700;
  color: var(--c-white);
}

a {
  color: var(--c-cyan);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--c-cyan-light); }

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

/* ---------- Navbar ---------- */
.site-nav {
  padding: 0.75rem 0;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
  z-index: 1000;
}
.site-nav.scrolled {
  background: rgba(11,17,32,0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--c-border);
  padding: 0.5rem 0;
}

/* Brand */
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-display);
  text-decoration: none;
}
.brand-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  background: var(--grad-brand);
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -1px;
}
.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--c-white);
  letter-spacing: 1px;
}
.brand-sub {
  font-size: 0.72rem;
  color: var(--c-muted);
  font-family: var(--font-body);
  font-weight: 400;
  margin-left: 6px;
  padding-top: 4px;
}

/* Nav links */
.site-nav .nav-link {
  color: rgba(240,246,255,0.8);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  letter-spacing: 0.3px;
}
.site-nav .nav-link:hover,
.site-nav .nav-link.active {
  color: var(--c-white);
  background: rgba(255,255,255,0.07);
}
.site-nav .nav-cta {
  background: var(--grad-brand);
  color: #fff !important;
  border-radius: var(--radius-sm);
  padding: 0.45rem 1.1rem;
  font-weight: 600;
}
.site-nav .nav-cta:hover {
  opacity: 0.88;
  background: var(--grad-brand);
}

/* Toggle button */
.navbar-toggler {
  border: none;
  padding: 0.3rem;
  background: none;
  outline: none;
  box-shadow: none;
}
.nav-toggle-icon {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 24px;
}
.nav-toggle-icon span {
  display: block;
  height: 2px;
  background: var(--c-white);
  border-radius: 2px;
  transition: all var(--transition);
}

/* Mobile nav */
@media (max-width: 991px) {
  .site-nav.scrolled,
  .site-nav { background: rgba(11,17,32,0.97); }
  #navMenu { padding: 1rem 0; border-top: 1px solid var(--c-border); margin-top: 0.5rem; }
  .navbar-nav { gap: 0.25rem; }
}

/* ---------- Shared Section Utilities ---------- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: var(--c-cyan);
  margin-bottom: 1rem;
}
.section-label::before {
  content: '';
  display: block;
  width: 28px; height: 2px;
  background: var(--c-cyan);
  border-radius: 1px;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 1rem;
}
.section-title .grad-text {
  background: var(--grad-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--c-muted);
  max-width: 560px;
  margin: 0 auto 3rem;
}

.py-section { padding: 5rem 0; }

/* Glass card */
.glass-card {
  background: var(--c-card-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
  border-color: rgba(37,99,235,0.3);
}

/* Btn primary */
.btn-primary-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--grad-brand);
  color: #fff;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.7rem 1.6rem;
  font-size: 0.95rem;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition);
  text-decoration: none;
}
.btn-primary-brand:hover {
  opacity: 0.88;
  transform: translateY(-1px);
  color: #fff;
}

.btn-outline-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--c-cyan);
  font-weight: 600;
  border: 1px solid var(--c-cyan);
  border-radius: var(--radius-sm);
  padding: 0.65rem 1.5rem;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-outline-brand:hover {
  background: var(--c-cyan);
  color: var(--c-navy);
}

/* ---------- Hero / Banner ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  background: var(--grad-hero);
  overflow: hidden;
}

/* Animated mesh background */
.hero-mesh {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.hero-mesh::before {
  content: '';
  position: absolute;
  width: 700px; height: 700px;
  top: -200px; right: -150px;
  background: radial-gradient(circle, rgba(37,99,235,0.22) 0%, transparent 70%);
  border-radius: 50%;
  animation: meshPulse 8s ease-in-out infinite alternate;
}
.hero-mesh::after {
  content: '';
  position: absolute;
  width: 500px; height: 500px;
  bottom: -100px; left: -100px;
  background: radial-gradient(circle, rgba(34,211,238,0.15) 0%, transparent 70%);
  border-radius: 50%;
  animation: meshPulse 10s ease-in-out infinite alternate-reverse;
}
@keyframes meshPulse {
  from { transform: scale(1) translate(0,0); }
  to   { transform: scale(1.15) translate(20px, -20px); }
}

/* Grid dots overlay */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding-top: 6rem;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(37,99,235,0.18);
  border: 1px solid rgba(37,99,235,0.35);
  color: var(--c-cyan);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  padding: 0.3rem 0.9rem;
  border-radius: 100px;
  margin-bottom: 1.5rem;
  animation: fadeSlideUp 0.6s ease both;
}
.hero-eyebrow .dot {
  width: 6px; height: 6px;
  background: var(--c-cyan);
  border-radius: 50%;
  animation: blink 2s ease infinite;
}
@keyframes blink {
  0%,100% { opacity: 1; }
  50%      { opacity: 0.3; }
}

.hero-title {
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  animation: fadeSlideUp 0.7s 0.1s ease both;
}
.hero-title .line2 {
  display: block;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.1rem;
  color: var(--c-muted);
  max-width: 540px;
  margin-bottom: 2.5rem;
  animation: fadeSlideUp 0.7s 0.2s ease both;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  animation: fadeSlideUp 0.7s 0.3s ease both;
}

/* Hero stats */
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  margin-top: 4rem;
  animation: fadeSlideUp 0.7s 0.45s ease both;
}
.stat-item {}
.stat-value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.stat-label {
  font-size: 0.82rem;
  color: var(--c-muted);
  margin-top: 4px;
}

/* Hero illustration (right column) */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 1s 0.4s ease both;
}
.tech-card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.tech-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  backdrop-filter: blur(8px);
  transition: border-color var(--transition), transform var(--transition);
}
.tech-card:hover {
  border-color: rgba(37,99,235,0.4);
  transform: translateY(-3px);
}
.tech-card-icon {
  font-size: 1.5rem;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.tech-card-name {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--c-white);
  letter-spacing: 0.3px;
}
.tech-card-desc {
  font-size: 0.7rem;
  color: var(--c-muted);
  line-height: 1.5;
}

/* ---------- Services Section ---------- */
.services-section {
  background: var(--c-navy);
}
.service-card {
  height: 100%;
}
.service-icon-wrap {
  width: 52px; height: 52px;
  background: rgba(37,99,235,0.12);
  border: 1px solid rgba(37,99,235,0.25);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  color: var(--c-blue-light);
  margin-bottom: 1.25rem;
  transition: all var(--transition);
}
.glass-card:hover .service-icon-wrap {
  background: rgba(37,99,235,0.22);
  border-color: var(--c-blue-light);
}
.service-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--c-white);
}
.service-desc {
  font-size: 0.88rem;
  color: var(--c-muted);
  line-height: 1.65;
  margin: 0;
}

/* ---------- Service card — featured (AI) ---------- */
.service-card-featured {
  background: linear-gradient(135deg,
    rgba(37,99,235,0.12) 0%,
    rgba(34,211,238,0.07) 100%);
  border-color: rgba(37,99,235,0.3);
}
.service-card-featured:hover {
  border-color: rgba(37,99,235,0.55);
  box-shadow: 0 0 48px rgba(37,99,235,0.25);
}

.service-icon-ai {
  width: 60px !important;
  height: 60px !important;
  font-size: 1.7rem !important;
  background: rgba(37,99,235,0.18) !important;
  border-color: rgba(37,99,235,0.4) !important;
  color: var(--c-cyan) !important;
}

.service-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  background: var(--grad-brand);
  color: #fff;
  padding: 2px 8px;
  border-radius: 100px;
  vertical-align: middle;
}

/* Service tags */
.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 0.75rem;
}
.service-tags span {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--c-cyan);
  background: rgba(34,211,238,0.08);
  border: 1px solid rgba(34,211,238,0.2);
  border-radius: 100px;
  padding: 2px 10px;
  white-space: nowrap;
}

/* ---------- About Page ---------- */
.page-hero {
  padding: 9rem 0 5rem;
  background: var(--grad-hero);
  position: relative;
  overflow: hidden;
}
.page-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-blue), transparent);
}
.page-hero-label {
  font-size: 0.78rem;
  color: var(--c-cyan);
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 1rem;
}
.page-hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
}
.page-hero-desc {
  font-size: 1.05rem;
  color: var(--c-muted);
  max-width: 600px;
}

.about-lead {
  font-size: 1.1rem;
  color: rgba(240,246,255,0.82);
  line-height: 1.9;
  text-indent: 2em;
}

.values-grid {}
.value-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.value-icon {
  font-size: 1.6rem;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.value-title {
  font-size: 1rem;
  font-weight: 700;
}
.value-desc {
  font-size: 0.87rem;
  color: var(--c-muted);
  line-height: 1.65;
  margin: 0;
}

/* Timeline-style section separator */
.section-sep {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, transparent, var(--c-blue), transparent);
  margin: 0 auto;
}

/* ---------- Careers Page ---------- */
.job-card {
  position: relative;
  overflow: hidden;
}
.job-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--grad-brand);
  border-radius: 3px 0 0 3px;
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}
.job-card:hover::before { transform: scaleY(1); }

.job-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.job-icon-wrap {
  width: 48px; height: 48px;
  background: rgba(37,99,235,0.12);
  border: 1px solid rgba(37,99,235,0.25);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  color: var(--c-blue-light);
  flex-shrink: 0;
}
.job-title { font-size: 1.15rem; font-weight: 700; margin: 0; }
.job-meta { font-size: 0.8rem; color: var(--c-cyan); margin-top: 2px; }

.job-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
@media (max-width: 768px) { .job-cols { grid-template-columns: 1fr; } }

.duty-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--c-cyan);
  letter-spacing: 0.5px;
  margin-bottom: 0.6rem;
}
.duty-list {
  list-style: none;
  padding: 0; margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.duty-list li {
  font-size: 0.87rem;
  color: rgba(240,246,255,0.8);
  display: flex;
  gap: 0.5rem;
  line-height: 1.55;
}
.duty-list li::before {
  content: '›';
  color: var(--c-blue-light);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 0px;
}
.job-apply {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--c-border);
  font-size: 0.87rem;
  color: var(--c-muted);
}
.job-apply a { color: var(--c-cyan); font-weight: 600; }

/* ---------- Contact Page ---------- */
.contact-info-card {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.info-row {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}
.info-icon {
  width: 42px; height: 42px;
  background: rgba(37,99,235,0.12);
  border: 1px solid rgba(37,99,235,0.25);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  color: var(--c-blue-light);
  flex-shrink: 0;
}
.info-label {
  font-size: 0.75rem;
  color: var(--c-muted);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 2px;
}
.info-value { font-size: 0.95rem; color: var(--c-white); font-weight: 500; }

/* Form */
.form-group-brand { margin-bottom: 1.25rem; }
.form-label-brand {
  display: block;
  font-size: 0.82rem;
  color: var(--c-muted);
  margin-bottom: 0.4rem;
  font-weight: 500;
}
.form-control-brand {
  width: 100%;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  color: var(--c-white);
  padding: 0.65rem 1rem;
  font-size: 0.95rem;
  font-family: var(--font-body);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  appearance: none;
}
.form-control-brand::placeholder { color: rgba(148,163,184,0.5); }
.form-control-brand:focus {
  border-color: var(--c-blue);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.2);
}
.form-control-brand.is-invalid { border-color: #f87171; }
textarea.form-control-brand { resize: vertical; min-height: 140px; }

.form-error { font-size: 0.78rem; color: #f87171; margin-top: 0.3rem; }

.alert-success-brand {
  background: rgba(16,185,129,0.12);
  border: 1px solid rgba(16,185,129,0.3);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  color: #6ee7b7;
  font-size: 0.9rem;
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--c-navy-mid);
  border-top: 1px solid var(--c-border);
  padding: 3rem 0 1.5rem;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-display);
  margin-bottom: 0.5rem;
}
.footer-tagline {
  font-size: 0.85rem;
  color: var(--c-muted);
  margin: 0;
}
.footer-heading {
  font-size: 0.78rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--c-muted);
  margin-bottom: 0.75rem;
  font-weight: 600;
  font-family: var(--font-body);
}
.footer-links {
  list-style: none;
  padding: 0; margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.footer-links a {
  font-size: 0.9rem;
  color: rgba(240,246,255,0.65);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--c-white); }

.footer-contact {
  font-size: 0.87rem;
  color: rgba(240,246,255,0.65);
}
.footer-contact p { margin-bottom: 0.35rem; }
.footer-contact a { color: var(--c-cyan); }

.footer-divider {
  border: none;
  border-top: 1px solid var(--c-border);
  margin: 2rem 0 1rem;
}
.footer-copy { font-size: 0.82rem; color: var(--c-muted); }
.footer-icp { font-size: 0.82rem; color: var(--c-muted); text-decoration: none; }
.footer-icp:hover { color: var(--c-white); }

/* ---------- Back to Top ---------- */
.back-to-top {
  position: fixed;
  bottom: 2rem; right: 2rem;
  width: 44px; height: 44px;
  background: var(--grad-brand);
  color: #fff;
  border: none;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition);
  z-index: 999;
  box-shadow: 0 4px 16px rgba(37,99,235,0.4);
}
.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}
.back-to-top:hover { transform: translateY(-3px); }

/* ---------- Scroll animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}
.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; }

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

/* ---------- Responsive tweaks ---------- */
@media (max-width: 768px) {
  .py-section { padding: 3.5rem 0; }
  .hero-stats { gap: 1.5rem; }
  .hero-visual { display: none; }
  .tech-card-grid { grid-template-columns: 1fr 1fr; }
  .back-to-top { bottom: 1.25rem; right: 1.25rem; }
}
@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .hero-actions a, .hero-actions button { width: 100%; justify-content: center; }
}