:root {
  --font-display: "SF Pro Display", "PingFang SC", -apple-system, BlinkMacSystemFont,
    "Helvetica Neue", sans-serif;
  --font-body: "SF Pro Text", "PingFang SC", -apple-system, BlinkMacSystemFont,
    "Helvetica Neue", sans-serif;
  --bg: #f6f1ea;
  --bg-soft: #fffaf2;
  --text: #1d1712;
  --muted: #6f5f52;
  --accent: #e16a4a;
  --accent-strong: #b65236;
  --accent-cool: #3f6f67;
  --accent-glow: rgba(225, 106, 74, 0.2);
  --card: rgba(255, 255, 255, 0.92);
  --border: #e7d6c6;
  --shadow: 0 24px 50px rgba(20, 16, 12, 0.14);
  --shine: linear-gradient(120deg, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0));
  --paper: rgba(255, 255, 255, 0.75);
}

* {
  box-sizing: border-box;
}

html[data-lang="zh"] .lang-en,
html[data-lang="en"] .lang-zh {
  display: none;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  background:
    radial-gradient(1100px 520px at 8% -10%, rgba(240, 205, 160, 0.6), rgba(240, 205, 160, 0) 60%),
    radial-gradient(900px 520px at 92% 0%, rgba(171, 213, 201, 0.55), rgba(171, 213, 201, 0) 65%),
    linear-gradient(180deg, #f6f1ea 0%, #fdfbf7 60%, #ffffff 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(rgba(255, 255, 255, 0.45) 1px, transparent 1px),
    radial-gradient(rgba(228, 210, 188, 0.35) 1px, transparent 1px);
  background-size: 120px 120px, 200px 200px;
  background-position: 0 0, 60px 60px;
  opacity: 0.55;
  pointer-events: none;
  z-index: -2;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(480px 320px at 16% 26%, rgba(225, 106, 74, 0.15), transparent 65%),
    radial-gradient(520px 320px at 85% 18%, rgba(63, 111, 103, 0.2), transparent 70%);
  animation: ambientGlow 26s ease-in-out infinite alternate;
  transform-origin: center;
  will-change: transform, opacity;
  pointer-events: none;
  z-index: -1;
}

h1,
h2,
h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  letter-spacing: -0.02em;
  line-height: 1.15;
}

h1 {
  font-size: clamp(2.6rem, 4vw, 3.6rem);
}

h2 {
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
}

h3 {
  font-size: 1.3rem;
}

p {
  margin: 0 0 1rem;
}

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

.page {
  max-width: 1120px;
  margin: 0 auto;
  padding: 40px 24px 72px;
}

.site-header {
  position: relative;
  padding-bottom: 24px;
}

.site-header::after {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  right: -80px;
  top: -140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(225, 106, 74, 0.2), transparent 70%);
  filter: blur(2px);
  z-index: -1;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.7);
  box-shadow: 0 18px 38px rgba(24, 18, 12, 0.08);
  backdrop-filter: blur(8px);
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
}

.nav::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.35), transparent 60%);
  opacity: 0.8;
  pointer-events: none;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.02em;
  position: relative;
  z-index: 1;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-weight: 700;
  color: #fff8f4;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  box-shadow: 0 12px 22px var(--accent-glow);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-sub {
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.nav-links {
  display: flex;
  gap: 18px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  flex-wrap: wrap;
  justify-content: flex-end;
  position: relative;
  z-index: 1;
}

.nav-links a {
  padding: 6px 12px;
  border-radius: 999px;
  transition: background-color 0.2s ease;
}

.nav-links a:hover {
  background-color: rgba(225, 106, 74, 0.12);
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border-radius: 999px;
  border: 1px solid rgba(30, 25, 20, 0.18);
  background: rgba(255, 255, 255, 0.6);
  padding: 4px;
  position: relative;
  z-index: 1;
}

.lang-btn {
  border: none;
  background: transparent;
  padding: 6px 12px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--muted);
  cursor: pointer;
}

html[data-lang="zh"] .lang-btn[data-lang="zh"],
html[data-lang="en"] .lang-btn[data-lang="en"] {
  background: var(--text);
  color: #fffaf6;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 48px;
  margin-top: 64px;
  align-items: start;
}

.eyebrow {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 18px;
  display: grid;
  gap: 6px;
}

.eyebrow .lang-en {
  text-transform: uppercase;
  letter-spacing: 0.24em;
}

.hero-title {
  display: grid;
  gap: 8px;
}

.lead {
  font-size: 1.1rem;
  max-width: 520px;
}

.dual .lang-zh,
.dual .lang-en {
  display: block;
}

.cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin: 24px 0 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #fffaf6;
  border-color: var(--accent);
  position: relative;
  overflow: hidden;
}

.btn.primary::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--shine);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.btn.primary:hover::after {
  opacity: 1;
}

.btn.ghost {
  background: transparent;
  border-color: rgba(30, 25, 20, 0.2);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 24px rgba(185, 83, 53, 0.16);
}

.btn.small {
  padding: 8px 16px;
  font-size: 0.85rem;
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.meta-label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-bottom: 6px;
}

.meta-value {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
}

.hero-panel {
  position: relative;
  background: var(--card);
  padding: 32px;
  border-radius: 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.35), transparent 60%);
  pointer-events: none;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.pill {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(30, 25, 20, 0.18);
  background: rgba(255, 255, 255, 0.6);
}

.bullet-list {
  padding-left: 18px;
  margin: 16px 0 24px;
}

.bullet-list li {
  margin-bottom: 12px;
}

.panel-stats {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.stat {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 600;
}

.stat-label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--muted);
}

.section {
  margin-top: 96px;
}

.section-header {
  max-width: 720px;
  margin-bottom: 32px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.card {
  position: relative;
  background: var(--card);
  border-radius: 22px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(180px 120px at 20% 0%, rgba(255, 255, 255, 0.35), transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.card:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 28px 60px rgba(20, 16, 12, 0.18);
}

.card:hover::after {
  opacity: 1;
}

.card-media {
  min-height: 160px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: #fffaf6;
  text-shadow: 0 10px 24px rgba(0, 0, 0, 0.2);
}

.card-media.ember {
  background: linear-gradient(135deg, #eea56f, #d26a4a 65%, #8a3f2c);
}

.card-media.sage {
  background: linear-gradient(135deg, #9fc6b3, #4c7e6a 70%, #2b4f46);
}

.card-media.sky {
  background: linear-gradient(135deg, #8fb9e6, #4e7fbe 70%, #233d5c);
}

.media-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.85;
}

.media-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
}

.card-body {
  padding: 24px;
}

.tag-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 16px 0 20px;
}

.tag {
  font-family: var(--font-display);
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(30, 25, 20, 0.08);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(0, 1fr);
  gap: 48px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 32px;
}

.principle-list {
  display: grid;
  gap: 24px;
}

.callout {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.9), rgba(255, 245, 236, 0.9));
  border-radius: 24px;
  padding: 32px;
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.callout::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(260px 160px at 20% 30%, rgba(225, 106, 74, 0.12), transparent 70%);
  opacity: 0.7;
  pointer-events: none;
}

.footer {
  margin-top: 96px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--muted);
}

.footer-links {
  display: flex;
  gap: 16px;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  transition-delay: var(--delay, 0s);
  will-change: opacity, transform;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes ambientGlow {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
    opacity: 0.95;
  }
  50% {
    transform: translate3d(1.5%, -1%, 0) scale(1.02);
    opacity: 0.9;
  }
  100% {
    transform: translate3d(-1.5%, 1%, 0) scale(1.01);
    opacity: 0.95;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  body::after {
    animation: none;
    transform: none;
  }
}

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .split {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .nav {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "brand lang"
      "links links";
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border-radius: 22px;
  }

  .brand {
    grid-area: brand;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    border-radius: 12px;
  }

  .brand-sub {
    letter-spacing: 0.16em;
  }

  .nav-links {
    grid-area: links;
    justify-content: flex-start;
    gap: 10px 16px;
    font-size: 0.9rem;
  }

  .lang-toggle {
    grid-area: lang;
    justify-self: end;
  }

  .hero-meta {
    grid-template-columns: 1fr;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .panel-stats {
    flex-direction: column;
  }
}