:root {
  --bg: #f4efe7;
  --bg-elevated: rgba(255,255,255,.66);
  --bg-elevated-strong: rgba(255,255,255,.82);
  --text: #18202a;
  --text-soft: rgba(24,32,42,.72);
  --line: rgba(24,32,42,.10);
  --line-strong: rgba(24,32,42,.16);
  --shadow: 0 22px 50px rgba(29, 32, 41, .10);
  --shadow-strong: 0 24px 64px rgba(22, 26, 34, .18);
  --accent: #b88d52;
  --accent-2: #6d8d8a;
  --hero-text: #f8f6f2;
  --radius-xl: 30px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --shell: 1180px;
}

html[data-theme="dark"] {
  --bg: #091017;
  --bg-elevated: rgba(13,20,28,.60);
  --bg-elevated-strong: rgba(14,22,31,.84);
  --text: #edf2f7;
  --text-soft: rgba(237,242,247,.72);
  --line: rgba(255,255,255,.09);
  --line-strong: rgba(255,255,255,.14);
  --shadow: 0 22px 54px rgba(0,0,0,.34);
  --shadow-strong: 0 28px 74px rgba(0,0,0,.42);
  --accent: #d1a062;
  --accent-2: #86a3a0;
  --hero-text: #ffffff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top, rgba(198,160,101,.10), transparent 28%),
    radial-gradient(circle at 80% 10%, rgba(122,167,160,.12), transparent 25%),
    var(--bg);
  color: var(--text);
  line-height: 1.5;
}
img, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

.shell { width: min(calc(100% - 32px), var(--shell)); margin: 0 auto; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  padding-top: max(10px, env(safe-area-inset-top));
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  margin-top: 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,.42);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  box-shadow: var(--shadow);
}
html[data-theme="dark"] .header-inner { background: rgba(12,18,25,.52); }
.brand img { width: 118px; height: auto; }
.header-actions { display: flex; align-items: center; gap: 12px; }
.lang-nav {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.lang-link {
  padding: 7px 10px;
  border-radius: 999px;
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 600;
}
.lang-link:hover,
.lang-link.is-active {
  background: var(--bg-elevated);
  color: var(--text);
}
.theme-toggle {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--bg-elevated);
  color: var(--text);
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: var(--shadow);
}
.theme-toggle__moon { display: none; }
html[data-theme="dark"] .theme-toggle__sun { display: none; }
html[data-theme="dark"] .theme-toggle__moon { display: inline; }

.announcement-slot {
  position: fixed;
  top: calc(max(10px, env(safe-area-inset-top)) + 84px);
  left: 50%;
  transform: translateX(-50%);
  width: min(calc(100% - 32px), 880px);
  z-index: 39;
}
.announcement {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 16px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--bg-elevated-strong);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px) saturate(150%);
}
.announcement p { margin: 0; font-size: 14px; color: var(--text-soft); }
.announcement a {
  white-space: nowrap;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--text);
  color: var(--bg);
  font-size: 14px;
  font-weight: 700;
}

.hero {
  position: relative;
  min-height: 100svh;
  isolation: isolate;
  display: grid;
  align-items: end;
  overflow: clip;
}
.hero-video,
.hero-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.hero-video { object-fit: cover; }
.hero-overlay {
  background:
    linear-gradient(180deg, rgba(13,18,25,.16) 0%, rgba(11,16,22,.34) 34%, rgba(10,14,20,.70) 100%),
    radial-gradient(circle at 50% 18%, rgba(255,255,255,.18), transparent 22%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  color: var(--hero-text);
  padding: 180px 0 58px;
}
.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  text-transform: uppercase;
  letter-spacing: .16em;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-soft);
}
.hero .eyebrow { color: rgba(255,255,255,.76); }
.hero h1 {
  margin: 0;
  max-width: 8.5ch;
  font-size: clamp(52px, 9vw, 110px);
  line-height: .94;
  letter-spacing: -.05em;
}
.hero-copy {
  margin: 18px 0 0;
  max-width: 620px;
  font-size: clamp(18px, 2.2vw, 24px);
  color: rgba(255,255,255,.84);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: rgba(255,255,255,.92);
  color: #10161d;
  box-shadow: 0 14px 34px rgba(0,0,0,.18);
}
.btn-secondary {
  background: rgba(255,255,255,.10);
  color: #fff;
  border-color: rgba(255,255,255,.26);
  backdrop-filter: blur(12px);
}
.btn-tertiary {
  background: transparent;
  color: rgba(255,255,255,.92);
  border-color: rgba(255,255,255,.22);
}
.btn-small { min-height: 42px; padding: 10px 14px; font-size: 14px; }

.section { padding: 34px 0; }
.intro { padding-top: 34px; }
.intro-grid,
.split-head,
.section-head {
  display: grid;
  gap: 20px;
}
.section-title {
  margin: 0;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.02;
  letter-spacing: -.04em;
}
.section-lead {
  margin: 0;
  color: var(--text-soft);
  font-size: clamp(16px, 2vw, 20px);
}
.section-lead.compact { max-width: 560px; }

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 24px;
}
.philo-card,
.feature-card,
.stage-card,
.social-card,
.ecosystem-card,
.next-panel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
}
.philo-card {
  aspect-ratio: 9 / 16;
  min-height: 420px;
}
.philo-card video,
.stage-card img,
.feature-card__media video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.card-gradient,
.stage-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6,10,16,.06) 0%, rgba(8,11,17,.30) 48%, rgba(7,10,16,.84) 100%);
}
.philo-card__body,
.stage-card__body {
  position: absolute;
  inset: auto 0 0;
  z-index: 2;
  padding: 18px;
  color: #fff;
}
.chip,
.feature-label {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 11px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.12);
  color: rgba(255,255,255,.92);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  backdrop-filter: blur(10px);
}
.philo-card h3,
.feature-card h3,
.stage-card h3,
.footer-title {
  margin: 12px 0 8px;
  font-size: clamp(22px, 2.2vw, 28px);
  line-height: 1.04;
  letter-spacing: -.03em;
}
.philo-card p,
.feature-card p,
.stage-card p,
.footer-copy,
.copyright {
  margin: 0;
  color: rgba(255,255,255,.82);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 24px;
}
.feature-card { min-height: 540px; }
.feature-card__media {
  position: absolute;
  inset: 0;
}
.feature-card__body {
  position: relative;
  z-index: 2;
  min-height: 540px;
  display: flex;
  flex-direction: column;
  justify-content: end;
  gap: 8px;
  padding: 22px;
  color: #fff;
  background: linear-gradient(180deg, rgba(9,14,20,.04) 0%, rgba(9,14,20,.22) 36%, rgba(9,14,20,.88) 100%);
}
.feature-actions,
.social-links,
.ecosystem-links,
.next-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.feature-actions { margin-top: 10px; }
.text-link {
  align-self: center;
  color: var(--text);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.text-link--light { color: rgba(255,255,255,.94); }

.stage-grid {
  display: grid;
  grid-template-columns: 1.28fr .86fr .86fr;
  gap: 18px;
  margin-top: 24px;
}
.stage-card { min-height: 420px; }
.stage-card--wide { min-height: 520px; }

.next-panel {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 24px;
  padding: 30px;
  background:
    linear-gradient(135deg, rgba(184,141,82,.16), rgba(255,255,255,.18) 45%, rgba(109,141,138,.14)),
    var(--bg-elevated-strong);
  box-shadow: var(--shadow-strong);
}
.next-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(255,255,255,.36);
  font-weight: 700;
}
html[data-theme="dark"] .next-chip { background: rgba(255,255,255,.06); }

.site-footer { padding: 18px 0 44px; }
.footer-grid {
  display: grid;
  grid-template-columns: .95fr 1.05fr;
  gap: 18px;
}
.social-card,
.ecosystem-card { padding: 26px; }
.footer-copy { color: var(--text-soft); max-width: 460px; }
.social-links { margin: 18px 0 16px; }
.social-links a,
.ecosystem-links a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg-elevated-strong);
  font-weight: 600;
}
.ecosystem-links { margin-top: 18px; }
.divider {
  width: 1px;
  height: 28px;
  background: var(--line-strong);
  align-self: center;
}
.copyright {
  margin-top: 18px;
  color: var(--text-soft);
  font-size: 14px;
}

@media (max-width: 1100px) {
  .philosophy-grid,
  .feature-grid,
  .stage-grid,
  .footer-grid,
  .next-panel {
    grid-template-columns: 1fr 1fr;
  }
  .stage-card--wide,
  .next-panel > :first-child,
  .ecosystem-card {
    grid-column: 1 / -1;
  }
}

@media (max-width: 820px) {
  .site-header { position: sticky; }
  .header-inner {
    border-radius: 24px;
    align-items: flex-start;
    flex-direction: column;
  }
  .header-actions { width: 100%; justify-content: space-between; }
  .lang-nav { gap: 4px; }
  .hero-content { padding-top: 150px; }
  .hero-actions,
  .feature-actions,
  .next-actions,
  .social-links,
  .ecosystem-links { flex-direction: column; align-items: stretch; }
  .philosophy-grid,
  .feature-grid,
  .stage-grid,
  .footer-grid,
  .next-panel,
  .intro-grid,
  .split-head { grid-template-columns: 1fr; }
  .philo-card,
  .feature-card,
  .stage-card,
  .stage-card--wide { min-height: 380px; }
  .announcement-slot { top: auto; bottom: 18px; }
}

@media (max-width: 560px) {
  .shell { width: min(calc(100% - 20px), var(--shell)); }
  .site-header { padding-top: max(8px, env(safe-area-inset-top)); }
  .header-inner { margin-top: 8px; padding: 12px 14px; }
  .brand img { width: 96px; }
  .lang-link { font-size: 12px; padding: 6px 8px; }
  .hero-content { padding: 136px 0 28px; }
  .hero h1 { max-width: none; }
  .section { padding: 24px 0; }
  .social-card,
  .ecosystem-card,
  .next-panel,
  .feature-card__body,
  .stage-card__body { padding: 18px; }
  .philo-card__body { padding: 16px; }
}

/* =========================================================
AURA UI SHARPEN PATCH v4
Targets current HTML structure correctly
========================================================= */

/* ---------- section rhythm ---------- */

.section {
  padding: 42px 0;
}

/* ---------- hero: keep structure, sharpen atmosphere ---------- */

.hero-overlay {
  background:
    linear-gradient(180deg, rgba(13,18,25,.10) 0%, rgba(11,16,22,.28) 34%, rgba(10,14,20,.68) 100%),
    radial-gradient(circle at 50% 18%, rgba(255,255,255,.16), transparent 22%),
    radial-gradient(circle at center, rgba(0,0,0,0) 38%, rgba(0,0,0,.28) 100%);
}

.hero h1 {
  max-width: 7.2ch;
  font-size: clamp(56px, 9vw, 116px);
}

.hero-copy {
  max-width: 700px;
  color: rgba(255,255,255,.90);
}

.hero-actions {
  gap: 14px;
}

/* hero buttons only */
.hero .btn-primary {
  background: rgba(255,255,255,.94);
  color: #10161d;
  box-shadow: 0 14px 34px rgba(0,0,0,.20);
}

.hero .btn-secondary {
  background: rgba(255,255,255,.10);
  color: #fff;
  border-color: rgba(255,255,255,.30);
  backdrop-filter: blur(12px);
}

.hero .btn-tertiary {
  background: linear-gradient(120deg, rgba(50,170,255,.88), rgba(62,222,194,.88));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 10px 24px rgba(50,180,255,.24);
}

/* ---------- header lighter and sleeker ---------- */

.header-inner {
  padding: 12px 18px;
  box-shadow: 0 18px 44px rgba(29, 32, 41, .12);
  background: rgba(255,255,255,.38);
}

html[data-theme="dark"] .header-inner {
  background: rgba(12,18,25,.46);
}

.brand img {
  width: 104px;
}

/* ---------- philosophy: stronger identity ---------- */

.philo-card {
  box-shadow: 0 22px 48px rgba(20,24,30,.14);
  transition: transform .28s ease, box-shadow .28s ease;
}

.philo-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 28px 64px rgba(20,24,30,.18);
}

.card-gradient {
  background: linear-gradient(
    180deg,
    rgba(6,10,16,.02) 0%,
    rgba(8,11,17,.24) 44%,
    rgba(7,10,16,.92) 100%
  );
}

.philo-card__body {
  padding: 18px 18px 20px;
}

.philo-card h3 {
  margin: 10px 0 6px;
  font-size: clamp(24px, 2.3vw, 30px);
}

.philo-card p {
  color: rgba(255,255,255,.88);
}

.philo-card .chip {
  background: rgba(255,255,255,.14);
  border: 1px solid rgba(255,255,255,.22);
  box-shadow: 0 0 16px rgba(255,255,255,.10);
}

/* optional individuality by position */
.philosophy-grid .philo-card:nth-child(1) .chip { box-shadow: 0 0 18px rgba(80,190,255,.28); }
.philosophy-grid .philo-card:nth-child(2) .chip { box-shadow: 0 0 18px rgba(188,116,255,.28); }
.philosophy-grid .philo-card:nth-child(3) .chip { box-shadow: 0 0 18px rgba(255,154,64,.28); }
.philosophy-grid .philo-card:nth-child(4) .chip { box-shadow: 0 0 18px rgba(255,206,92,.28); }

/* ---------- implementation: make cards feel more complete ---------- */

.feature-card {
  box-shadow: 0 22px 50px rgba(20,24,30,.14);
  transition: transform .28s ease, box-shadow .28s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 30px 68px rgba(20,24,30,.18);
}

.feature-card__body {
  background: linear-gradient(
    180deg,
    rgba(9,14,20,.02) 0%,
    rgba(9,14,20,.18) 34%,
    rgba(9,14,20,.94) 100%
  );
  padding: 24px;
}

.feature-card h3 {
  margin-top: 12px;
}

.feature-card p {
  color: rgba(255,255,255,.86);
}

.feature-actions {
  margin-top: 14px;
}

/* only implementation / stage primary buttons */
.feature-card .btn-primary,
.stage-card .btn-primary {
  background: linear-gradient(120deg, #1f7e67, #2fd0ff);
  color: #fff;
  border: 0;
  box-shadow:
    0 8px 22px rgba(0,0,0,.24),
    0 0 18px rgba(56,190,255,.22);
}

.feature-card .btn-secondary,
.stage-card .btn-secondary {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.36);
}

/* ---------- stage cards ---------- */

.stage-card {
  box-shadow: 0 22px 50px rgba(20,24,30,.14);
  transition: transform .28s ease, box-shadow .28s ease;
}

.stage-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 30px 68px rgba(20,24,30,.18);
}

.stage-card__overlay {
  background: linear-gradient(
    180deg,
    rgba(6,10,16,.04) 0%,
    rgba(7,10,16,.28) 46%,
    rgba(7,10,16,.94) 100%
  );
}

.stage-card__body {
  padding: 20px;
}

.stage-card p {
  color: rgba(255,255,255,.86);
}

/* strengthen review card CTA */
.stage-card:last-child .text-link--light {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  background: linear-gradient(120deg, #329cff, #42dfc7);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  box-shadow:
    0 10px 24px rgba(0,0,0,.24),
    0 0 18px rgba(60,200,255,.22);
}

/* ---------- next steps ---------- */

.next-panel {
  padding: 34px;
  background:
    linear-gradient(135deg, rgba(184,141,82,.10), rgba(255,255,255,.22) 48%, rgba(109,141,138,.12)),
    var(--bg-elevated-strong);
  box-shadow: 0 24px 60px rgba(22,26,34,.10);
}

.next-chip {
  min-height: 52px;
  background: rgba(255,255,255,.42);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.next-chip:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(22,26,34,.10);
}

.next-actions .next-chip:first-child {
  background: linear-gradient(120deg, #329cff, #42dfc7);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 10px 24px rgba(60,200,255,.18);
}

/* ---------- footer ---------- */

.social-card,
.ecosystem-card {
  background:
    linear-gradient(180deg, rgba(255,255,255,.74), rgba(255,255,255,.60)),
    var(--bg-elevated);
  box-shadow: 0 20px 44px rgba(22,26,34,.10);
}

html[data-theme="dark"] .social-card,
html[data-theme="dark"] .ecosystem-card {
  background:
    linear-gradient(180deg, rgba(18,24,32,.82), rgba(14,20,28,.72)),
    var(--bg-elevated);
}

.social-links a,
.ecosystem-links a {
  background: rgba(255,255,255,.54);
  transition: transform .18s ease, box-shadow .18s ease;
}

.social-links a:hover,
.ecosystem-links a:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(22,26,34,.10);
}

html[data-theme="dark"] .social-links a,
html[data-theme="dark"] .ecosystem-links a {
  background: rgba(255,255,255,.06);
}

/* ---------- responsive fine-tune ---------- */

@media (max-width: 820px) {
  .hero h1 {
    max-width: none;
  }

  .next-panel {
    padding: 22px;
  }

  .feature-card__body,
  .stage-card__body,
  .social-card,
  .ecosystem-card {
    padding: 18px;
  }
}
/* =========================================================
AURA PATCH v5
Fix hero gap + refine floating header
========================================================= */


/* ---------- fix golden gap under header ---------- */

.hero{
margin-top:0 !important;
padding-top:0 !important;
}

.section:first-of-type{
margin-top:0 !important;
}


/* prevent global section spacing pushing hero */

section:not(.hero){
margin-top:64px;
}


/* ---------- hero background must reach top ---------- */

.hero{
position:relative;
min-height:100vh;
}


/* ---------- shrink floating header ---------- */

.header-inner{

max-width:820px;
margin:auto;

padding:10px 16px;

border-radius:22px;

backdrop-filter:blur(16px);

box-shadow:0 10px 28px rgba(0,0,0,.12);

}


/* logo scale */

.brand img{
width:84px;
}


/* ---------- hero overlay slightly darker ---------- */

.hero-overlay{

background:
linear-gradient(
180deg,
rgba(0,0,0,0.35) 0%,
rgba(0,0,0,0.45) 40%,
rgba(0,0,0,0.60) 100%
);

}


/* ---------- mobile adjustments ---------- */

@media (max-width:720px){

.header-inner{

max-width:92%;

padding:12px 14px;

border-radius:20px;

}

.brand img{
width:52px;
}

.lang-switch{

font-size:13px;

gap:10px;

}

}
/* =========================================================
AURA PATCH v6
Mobile header shrink
========================================================= */

@media (max-width: 720px) {

  .site-header {
    top: 10px;
  }

  .header-inner {
    max-width: calc(100% - 28px);
    min-height: auto;
    padding: 10px 12px;
    border-radius: 18px;
    gap: 10px;
  }

  .brand img {
    width: 42px;
    height: 42px;
  }

  .header-actions {
    gap: 10px;
    align-items: center;
  }

  .lang-nav {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: 6px;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .lang-nav::-webkit-scrollbar {
    display: none;
  }

  .lang-link {
    font-size: 12px;
    padding: 0 2px;
    white-space: nowrap;
  }

  .lang-link.is-active {
    min-width: 36px;
    height: 36px;
    padding: 0 10px;
    border-radius: 999px;
  }

  .theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    flex: 0 0 44px;
  }

  .theme-toggle__sun,
  .theme-toggle__moon {
    font-size: 14px;
  }

  /* 给 hero 内容更多空间，避免 header 抢画面 */
  .hero-content {
    padding-top: 118px;
  }
}