@import url("https://fonts.googleapis.com/css2?family=Outfit:wght@500;600;700&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap");

:root {
  --bg: #F8FAFC;
  --bg-elevated: #FFFFFF;
  --brand: #0B4F8A;
  --brand-dark: #083A66;
  --brand-soft: #E8F1F8;
  --accent: #0D9488;
  --accent-soft: #E6F7F5;
  --cta: #0369A1;
  --text: #0F172A;
  --muted: #64748B;
  --line: #E2E8F0;
  --white: #ffffff;
  --max: 1120px;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 10px 40px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.1);
  --font: "Plus Jakarta Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  --display: "Outfit", "Plus Jakarta Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a {
  color: var(--brand);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}
a:hover { color: var(--accent); }
a, button, .btn, .card-link, .nav-links a { cursor: pointer; }
:focus-visible {
  outline: 2px solid var(--cta);
  outline-offset: 3px;
}
.container { width: min(100% - 2rem, var(--max)); margin-inline: auto; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(248, 250, 252, 0.78);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 4px 24px rgba(15, 23, 42, 0.04);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 68px; gap: 1rem;
}
.brand {
  font-family: var(--display);
  font-size: 1.3rem; font-weight: 700;
  color: var(--brand); letter-spacing: -0.02em;
}
.brand span { color: var(--accent); }
.nav-links {
  display: flex; align-items: center; gap: 0.35rem 1.1rem;
  list-style: none; margin: 0; padding: 0;
}
.nav-links a {
  color: var(--muted); font-size: 0.92rem; font-weight: 500;
  padding: 0.4rem 0.35rem; border-radius: 8px;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}
.nav-links a:hover { color: var(--brand); background: var(--brand-soft); }
.nav-links a.is-active { color: var(--brand); font-weight: 600; }
.lang-switch { font-size: 0.82rem; color: var(--muted); margin-left: 0.25rem; }
.lang-switch a { color: var(--muted); margin-left: 0.3rem; padding: 0.35rem 0.45rem !important; }
.lang-switch a.is-active {
  color: var(--brand) !important; font-weight: 600;
  background: var(--brand-soft);
}
.nav-toggle {
  display: none; border: 0; background: transparent;
  width: 44px; height: 44px; cursor: pointer; padding: 10px; border-radius: 10px;
}
.nav-toggle:hover { background: var(--brand-soft); }
.nav-toggle span {
  display: block; height: 2px; background: var(--text);
  margin: 6px 0; border-radius: 1px; transition: transform 0.2s var(--ease);
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 0.4rem;
  min-height: 44px;
  padding: 0.8rem 1.35rem; border-radius: 999px;
  font-weight: 600; font-size: 0.95rem; border: 1px solid transparent;
  transition: background 0.2s var(--ease), color 0.2s var(--ease),
    border-color 0.2s var(--ease), transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: linear-gradient(135deg, var(--brand) 0%, var(--cta) 55%, #0A7A72 120%);
  color: var(--white);
  box-shadow: 0 8px 24px rgba(11, 79, 138, 0.28);
}
.btn-primary:hover {
  color: var(--white);
  box-shadow: 0 12px 28px rgba(11, 79, 138, 0.36);
  transform: translateY(-1px);
}
.btn-ghost {
  background: var(--white); color: var(--brand);
  border-color: #CBD5E1;
}
.btn-ghost:hover {
  border-color: var(--brand); background: var(--brand-soft); color: var(--brand);
}
.btn-row { display: flex; flex-wrap: wrap; gap: 0.85rem; }

/* Hero */
.hero {
  position: relative;
  padding: 4.5rem 0 3.25rem;
  overflow: hidden;
  background:
    radial-gradient(900px 420px at 88% -5%, rgba(13, 148, 136, 0.14), transparent 55%),
    radial-gradient(700px 380px at 8% 10%, rgba(11, 79, 138, 0.12), transparent 50%),
    linear-gradient(180deg, #F1F5F9 0%, var(--bg) 70%);
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(11, 79, 138, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 79, 138, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.45), transparent 85%);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  display: grid; gap: 2.75rem; align-items: center;
  grid-template-columns: 1.05fr 0.95fr;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.45rem;
  font-size: 0.8rem; font-weight: 600; letter-spacing: 0.04em;
  color: var(--accent); text-transform: uppercase;
  background: var(--accent-soft); border: 1px solid rgba(13, 148, 136, 0.2);
  padding: 0.35rem 0.75rem; border-radius: 999px; margin: 0 0 1rem;
}
.eyebrow .pulse {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 rgba(13, 148, 136, 0.5);
  animation: pulseDot 1.8s ease infinite;
}
.hero-brand {
  font-family: var(--display);
  font-size: clamp(1.65rem, 2.8vw, 2.1rem);
  font-weight: 700; color: var(--brand);
  letter-spacing: -0.03em; margin: 0 0 0.65rem;
}
.hero h1 {
  font-family: var(--display);
  font-size: clamp(1.85rem, 3.6vw, 2.85rem);
  line-height: 1.18; letter-spacing: -0.03em;
  margin: 0 0 1rem; color: var(--text);
}
.hero .lead {
  color: var(--muted); font-size: 1.08rem; margin: 0 0 1.85rem;
  max-width: 34em; line-height: 1.7;
}

/* Chat mock */
.chat-mock {
  position: relative;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 1.35rem;
  box-shadow: var(--shadow-lg);
}
.chat-mock::after {
  content: "";
  position: absolute; inset: -1px;
  border-radius: 21px;
  background: linear-gradient(135deg, rgba(11,79,138,0.25), transparent 40%, rgba(13,148,136,0.25));
  z-index: -1; opacity: 0.55;
}
.chat-mock .bar {
  display: flex; align-items: center; gap: 0.55rem;
  margin-bottom: 1.1rem; color: var(--muted); font-size: 0.85rem; font-weight: 500;
}
.chat-mock .dot {
  width: 9px; height: 9px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
  animation: pulseDot 1.8s ease infinite;
}
.bubble {
  max-width: 90%; padding: 0.78rem 1rem; border-radius: 14px;
  margin-bottom: 0.7rem; font-size: 0.92rem; line-height: 1.5;
}
.bubble.bot {
  background: linear-gradient(180deg, #F0FDFA, #EEF6F5);
  color: var(--text); border: 1px solid rgba(13, 148, 136, 0.12);
  border-bottom-left-radius: 4px;
}
.bubble.user {
  background: linear-gradient(135deg, var(--brand), var(--cta));
  color: var(--white); margin-left: auto;
  border-bottom-right-radius: 4px;
}

/* Trust strip */
.trust-strip {
  display: flex; flex-wrap: wrap; gap: 0.75rem 1.5rem;
  align-items: center; justify-content: space-between;
  padding: 1rem 1.25rem; margin-top: 2.5rem;
  background: rgba(255,255,255,0.7);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
}
.trust-strip .item {
  display: flex; align-items: center; gap: 0.55rem;
  color: var(--muted); font-size: 0.88rem; font-weight: 500;
}
.trust-strip svg { color: var(--brand); flex-shrink: 0; }

/* Sections */
.section { padding: 4rem 0; }
.section-alt {
  background: var(--bg-elevated);
  border-block: 1px solid var(--line);
}
.section h2 {
  font-family: var(--display);
  font-size: clamp(1.45rem, 2.4vw, 1.9rem);
  letter-spacing: -0.02em; margin: 0 0 0.45rem;
}
.section .sub { color: var(--muted); margin: 0 0 2.25rem; max-width: 40em; }

.feature-row {
  display: grid; gap: 1.15rem;
  grid-template-columns: repeat(3, 1fr);
}
.feature {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.35rem 1.25rem;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}
.feature:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(11, 79, 138, 0.22);
}
.feature .icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--accent-soft); color: var(--accent);
  display: grid; place-items: center; margin-bottom: 0.9rem;
}
.feature .icon svg { width: 22px; height: 22px; }
.feature h3 { margin: 0 0 0.4rem; font-size: 1.05rem; letter-spacing: -0.01em; }
.feature p { margin: 0; color: var(--muted); font-size: 0.94rem; }

.scene-list { display: grid; gap: 0.85rem; }
.scene {
  display: grid; grid-template-columns: 120px 1fr; gap: 1rem;
  align-items: start; padding: 1.15rem 1.2rem;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.scene:hover {
  border-color: rgba(13, 148, 136, 0.35);
  box-shadow: var(--shadow);
}
.scene .tag {
  font-size: 0.75rem; font-weight: 700; color: var(--accent);
  letter-spacing: 0.06em; text-transform: uppercase;
  background: var(--accent-soft); padding: 0.3rem 0.55rem;
  border-radius: 999px; width: fit-content;
}
.scene h3 { margin: 0 0 0.35rem; font-size: 1.05rem; }
.scene p { margin: 0; color: var(--muted); }

.card-list {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(3, 1fr);
}
.card-link {
  display: block; padding: 1.25rem;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}
.section-alt .card-link { background: var(--bg); }
.section:not(.section-alt) .card-link { background: var(--bg-elevated); }
.card-link:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(11, 79, 138, 0.25);
}
.card-link .meta {
  font-size: 0.78rem; font-weight: 600; color: var(--accent);
  letter-spacing: 0.03em; margin-bottom: 0.45rem;
}
.card-link h3 {
  margin: 0 0 0.4rem; font-size: 1.05rem; color: var(--text);
  letter-spacing: -0.01em;
}
.card-link p { margin: 0; color: var(--muted); font-size: 0.92rem; }
.card-link:hover h3 { color: var(--brand); }
.more-link {
  display: inline-flex; align-items: center; gap: 0.35rem;
  margin-top: 1.35rem; font-weight: 600; font-size: 0.95rem;
}

.cta-band {
  background: linear-gradient(125deg, #0B4F8A 0%, #0A6A8A 45%, #0D8078 100%);
  color: var(--white); border-radius: 20px; padding: 2.25rem 2rem;
  display: flex; flex-wrap: wrap; gap: 1.25rem;
  align-items: center; justify-content: space-between;
  box-shadow: 0 16px 40px rgba(11, 79, 138, 0.25);
  position: relative; overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute; width: 280px; height: 280px; right: -60px; top: -80px;
  background: radial-gradient(circle, rgba(255,255,255,0.12), transparent 65%);
  pointer-events: none;
}
.cta-band h2 { margin: 0 0 0.35rem; color: var(--white); position: relative; }
.cta-band p { margin: 0; opacity: 0.92; position: relative; }
.cta-band .btn-primary {
  background: var(--white); color: var(--brand);
  box-shadow: none; position: relative;
}
.cta-band .btn-primary:hover { background: #E8F4F3; color: var(--brand-dark); }

/* Page hero (inner) */
.page-hero {
  padding: 2.75rem 0 1.5rem;
  background:
    radial-gradient(600px 220px at 90% 0%, rgba(13,148,136,0.08), transparent 60%),
    linear-gradient(180deg, #F1F5F9, var(--bg));
}
.page-hero h1 {
  font-family: var(--display);
  font-size: clamp(1.55rem, 2.8vw, 2.15rem);
  letter-spacing: -0.02em; margin: 0 0 0.5rem;
}
.page-hero p { margin: 0; color: var(--muted); max-width: 40em; }

.prose { max-width: 42em; }
.prose h2 { margin-top: 2rem; font-family: var(--display); letter-spacing: -0.02em; }
.prose h3 { margin-top: 1.35rem; }
.prose p { color: var(--text); }
.prose .muted { color: var(--muted); }

.contact-layout {
  display: grid; gap: 2rem;
  grid-template-columns: 1fr 1.15fr;
  align-items: start;
}
.contact-grid {
  display: grid; gap: 1rem;
  grid-template-columns: 1fr;
}
.contact-item {
  padding: 1.15rem 1.2rem;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease), transform 0.25s var(--ease);
}
.contact-item:hover {
  border-color: rgba(11, 79, 138, 0.25);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.contact-item .label { font-size: 0.82rem; color: var(--muted); font-weight: 500; }
.contact-item .value { font-size: 1.08rem; font-weight: 600; color: var(--text); margin-top: 0.25rem; }
.contact-item a { color: var(--brand); }
.contact-item .actions { margin-top: 0.65rem; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.btn-sm {
  min-height: 36px; padding: 0.4rem 0.85rem; font-size: 0.85rem;
  border-radius: 999px;
}
.contact-panel {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.contact-panel h2 {
  font-family: var(--display);
  font-size: 1.25rem; margin: 0 0 0.35rem; letter-spacing: -0.02em;
}
.contact-panel .hint { color: var(--muted); font-size: 0.92rem; margin: 0 0 1.25rem; }
.form-grid { display: grid; gap: 0.9rem; }
.form-row { display: grid; gap: 0.9rem; grid-template-columns: 1fr 1fr; }
.field label {
  display: block; font-size: 0.85rem; font-weight: 600;
  color: var(--text); margin-bottom: 0.35rem;
}
.field input, .field textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 12px;
  padding: 0.75rem 0.9rem; font: inherit; color: var(--text);
  background: #fff; transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--cta);
  box-shadow: 0 0 0 3px rgba(3, 105, 161, 0.15);
}
.field textarea { min-height: 120px; resize: vertical; }
.form-tip {
  margin: 0.85rem 0 0; font-size: 0.9rem; color: var(--accent); font-weight: 500;
}
.chat-mock { transition: transform 0.35s var(--ease); }
.chat-mock .bubble.is-pending { opacity: 0; transform: translateY(8px); height: 0; margin: 0; padding: 0; overflow: hidden; border: 0; }
.chat-mock .bubble.is-show {
  opacity: 1; transform: none; height: auto;
  animation: bubbleIn 0.45s var(--ease) both;
}
.chat-mock .bubble.typing {
  display: inline-flex; gap: 5px; align-items: center;
  min-width: 52px; padding: 0.85rem 1rem;
}
.chat-mock .bubble.typing span {
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent);
  animation: typingDot 1s ease infinite;
}
.chat-mock .bubble.typing span:nth-child(2) { animation-delay: 0.15s; }
.chat-mock .bubble.typing span:nth-child(3) { animation-delay: 0.3s; }
@keyframes bubbleIn {
  from { opacity: 0; transform: translateY(10px) scale(0.98); }
  to { opacity: 1; transform: none; }
}
@keyframes typingDot {
  0%, 80%, 100% { opacity: 0.35; transform: translateY(0); }
  40% { opacity: 1; transform: translateY(-3px); }
}
.hero::after {
  content: "";
  position: absolute; width: 420px; height: 420px; right: -120px; bottom: -160px;
  background: radial-gradient(circle, rgba(13,148,136,0.12), transparent 70%);
  animation: floatBlob 10s ease-in-out infinite;
  pointer-events: none;
}
@keyframes floatBlob {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-24px, -18px); }
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 2.25rem 0 2.5rem; margin-top: 1rem;
  color: var(--muted); font-size: 0.9rem;
  background: #F1F5F9;
}
.footer-grid {
  display: flex; flex-wrap: wrap; gap: 1.25rem;
  justify-content: space-between; align-items: flex-start;
}
.footer-nav { display: flex; flex-wrap: wrap; gap: 1rem; }
.footer-nav a { color: var(--muted); font-weight: 500; }
.footer-nav a:hover { color: var(--brand); }
.icp { margin-top: 1.15rem; font-size: 0.85rem; }

/* Motion */
.fade-up {
  opacity: 0; transform: translateY(14px);
  animation: fadeUp 0.7s var(--ease) forwards;
}
.fade-up.d1 { animation-delay: 0.08s; }
.fade-up.d2 { animation-delay: 0.16s; }
.fade-up.d3 { animation-delay: 0.24s; }
@keyframes fadeUp {
  to { opacity: 1; transform: none; }
}
@keyframes pulseDot {
  0% { box-shadow: 0 0 0 0 rgba(13, 148, 136, 0.45); }
  70% { box-shadow: 0 0 0 8px rgba(13, 148, 136, 0); }
  100% { box-shadow: 0 0 0 0 rgba(13, 148, 136, 0); }
}
.reveal {
  opacity: 0; transform: translateY(18px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .fade-up, .reveal, .chat-mock .dot, .eyebrow .pulse {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  .feature:hover, .card-link:hover, .btn:active, .btn-primary:hover {
    transform: none;
  }
}

/* Mobile */
@media (max-width: 800px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; left: 0; right: 0; top: 68px;
    flex-direction: column; align-items: stretch;
    background: rgba(255,255,255,0.98);
    border-bottom: 1px solid var(--line);
    padding: 0.85rem 1.25rem 1.15rem; gap: 0.35rem;
    box-shadow: var(--shadow);
  }
  .nav-links.is-open { display: flex; }
  .nav-links a { padding: 0.7rem 0.75rem; }
  .hero-grid, .feature-row, .card-list, .contact-grid, .contact-layout, .form-row {
    grid-template-columns: 1fr;
  }
  .scene { grid-template-columns: 1fr; gap: 0.5rem; }
  .btn { width: 100%; }
  .btn-row { flex-direction: column; }
  .hero { padding: 2.75rem 0 2.25rem; }
  .trust-strip { justify-content: flex-start; }
  .cta-band { padding: 1.75rem 1.35rem; }
}

@media (min-width: 1440px) {
  :root { --max: 1180px; }
}