:root {
  --brown-950: #1a0e07;
  --brown-900: #2a1407;
  --brown-800: #381b09;
  --brown-700: #4c221b;
  --brown-600: #6e3329;
  --brown-focus: #9a3f32;
  --gold-200: #e8d4b0;
  --gold-300: #d4b484;
  --gold-400: #c19a6b;
  --gold-500: #a67c52;
  --gold-600: #8a5a3a;
  --blush: #f7f0ef;
  --blush-deep: #f0e0dd;
  --page: #faf7f5;
  --ink: #2a1407;
  --ink-soft: rgba(42, 20, 7, 0.72);
  --ink-mute: rgba(42, 20, 7, 0.48);
  --line: rgba(76, 34, 27, 0.12);
  --line-strong: rgba(193, 154, 107, 0.45);
  --radius: 20px;
  --font-display: "Noto Serif SC", "Songti SC", "STSong", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --max: 1100px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.7;
  background:
    radial-gradient(900px 420px at 100% 0%, rgba(193, 154, 107, 0.12), transparent 55%),
    radial-gradient(700px 380px at 0% 35%, rgba(76, 34, 27, 0.05), transparent 50%),
    linear-gradient(180deg, var(--blush) 0%, var(--page) 28%, #fff 100%);
}

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

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

.nav {
  position: sticky;
  top: 0;
  z-index: 30;
  padding: 0.85rem 0;
  background: linear-gradient(90deg, var(--brown-800), var(--brown-700));
  border-bottom: 1px solid rgba(193, 154, 107, 0.22);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(100% - 2.4rem, var(--max));
  margin: 0 auto;
}

#features,
#about,
#enter {
  scroll-margin-top: 5.5rem;
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--gold-200);
}

.nav-brand img {
  width: 48px;
  height: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  font-size: 0.92rem;
  color: rgba(247, 240, 239, 0.72);
}

.nav-links a:hover {
  color: var(--gold-200);
}

.nav-cta {
  padding: 0.42rem 0.95rem;
  border-radius: 999px;
  color: var(--brown-950) !important;
  background: linear-gradient(135deg, #ecd7b0, var(--gold-400) 48%, var(--gold-500));
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.25);
}

.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: min(88vh, 780px);
  overflow: hidden;
  color: var(--blush);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(1000px 520px at 18% 20%, rgba(193, 154, 107, 0.28), transparent 55%),
    radial-gradient(800px 480px at 88% 10%, rgba(154, 63, 50, 0.22), transparent 50%),
    linear-gradient(145deg, #5a3220 0%, #381b09 42%, #2a1407 78%, #1a0e07 100%);
}

.hero-wash {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(26, 14, 7, 0.18), transparent 55%),
    repeating-linear-gradient(
      -18deg,
      transparent 0 14px,
      rgba(193, 154, 107, 0.035) 14px 15px
    );
  animation: washDrift 18s ease-in-out infinite alternate;
}

.hero-mesh {
  position: absolute;
  right: -8%;
  top: -20%;
  width: min(640px, 70vw);
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1px solid rgba(193, 154, 107, 0.18);
  animation: ringDrift 16s ease-in-out infinite;
}

.hero-mesh::before,
.hero-mesh::after {
  content: "";
  position: absolute;
  inset: 10%;
  border-radius: 50%;
  border: 1px dashed rgba(193, 154, 107, 0.16);
}

.hero-mesh::after {
  inset: 22%;
  border-style: solid;
  opacity: 0.7;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: clamp(1.8rem, 5vw, 3.5rem);
  width: min(100% - 2.4rem, var(--max));
  margin: 0 auto;
  padding: clamp(2rem, 4vh, 3rem) 0;
}

.hero-copy {
  animation: riseIn 0.85s ease both;
}

.hero-brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.7rem, 7vw, 4.5rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: 0.14em;
  background: linear-gradient(180deg, #f7ecd7 0%, var(--gold-400) 55%, var(--gold-600) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-headline {
  margin: 1rem 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.5vw, 1.55rem);
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--gold-200);
}

.hero-lead {
  margin: 0 0 1.7rem;
  max-width: 26rem;
  color: rgba(247, 240, 239, 0.78);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.75rem 1.35rem;
  border-radius: 999px;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-gold {
  color: var(--brown-950);
  background: linear-gradient(135deg, #ecd7b0, var(--gold-400) 48%, var(--gold-500));
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.22);
}

.btn-ghost {
  color: var(--gold-200);
  border: 1px solid rgba(193, 154, 107, 0.4);
  background: rgba(255, 255, 255, 0.04);
}

.btn-ghost:hover {
  border-color: var(--gold-300);
  background: rgba(255, 255, 255, 0.08);
}

.hero-visual {
  display: flex;
  justify-content: center;
  animation: riseIn 1s 0.1s ease both;
}

.note-plate {
  width: min(100%, 400px);
  aspect-ratio: 1.55 / 1;
  padding: 1px;
  border-radius: 22px;
  background: linear-gradient(145deg, rgba(232, 212, 176, 0.7), rgba(78, 42, 24, 0.15) 42%, rgba(193, 154, 107, 0.5));
  box-shadow: 0 28px 60px rgba(0, 0, 0, 0.35);
  transform: rotate(-2deg);
}

.note-plate-inner {
  position: relative;
  height: 100%;
  border-radius: 21px;
  overflow: hidden;
  padding: 1.35rem 1.4rem 1.15rem;
  background:
    radial-gradient(circle at 16% 28%, rgba(193, 154, 107, 0.2), transparent 42%),
    linear-gradient(160deg, #5a3220, #2a1408 58%, #3f2311);
}

.note-ornament {
  position: absolute;
  inset: 0.65rem;
  border-radius: 14px;
  border: 1px solid rgba(193, 154, 107, 0.24);
  background-image:
    radial-gradient(circle at 12% 50%, transparent 34%, rgba(193, 154, 107, 0.1) 35%, transparent 36%),
    radial-gradient(circle at 88% 50%, transparent 34%, rgba(193, 154, 107, 0.1) 35%, transparent 36%);
}

.note-chart {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-end;
  gap: 0.65rem;
  height: 56%;
  margin-top: 1.1rem;
  padding: 0 0.55rem;
}

.note-chart span {
  flex: 1;
  height: var(--h);
  border-radius: 8px 8px 3px 3px;
  background: linear-gradient(180deg, var(--gold-200), var(--gold-500));
  transform-origin: bottom;
  animation: barRise 1.35s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.note-chart span:nth-child(2) { animation-delay: 0.07s; }
.note-chart span:nth-child(3) { animation-delay: 0.14s; }
.note-chart span:nth-child(4) { animation-delay: 0.21s; }
.note-chart span:nth-child(5) { animation-delay: 0.28s; }

.note-meta {
  position: relative;
  z-index: 1;
  margin-top: 1rem;
  padding: 0 0.45rem;
}

.note-meta em {
  display: block;
  font-style: normal;
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  color: rgba(247, 240, 239, 0.45);
}

.note-meta strong {
  display: block;
  margin-top: 0.2rem;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--gold-200);
}

.pillars {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  width: min(100% - 2.4rem, var(--max));
  margin: -2.2rem auto 4.2rem;
  position: relative;
  z-index: 2;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  box-shadow: 0 18px 40px rgba(56, 27, 9, 0.08);
}

.pillar {
  padding: 1.35rem 1rem;
  text-align: center;
  border-right: 1px solid var(--line);
}

.pillar:last-child {
  border-right: 0;
}

.pillar strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.4vw, 1.75rem);
  letter-spacing: 0.14em;
  color: var(--brown-700);
}

.pillar span {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.9rem;
  color: var(--ink-mute);
}

.features,
.about,
.enter {
  width: min(100% - 2.4rem, var(--max));
  margin: 0 auto;
}

.features {
  padding-bottom: 4.5rem;
}

.section-head {
  margin-bottom: 2rem;
}

.eyebrow {
  margin: 0 0 0.55rem;
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  color: var(--gold-500);
}

.section-head h2,
.about-panel h2,
.enter-copy h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 3.2vw, 2.2rem);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0.03em;
  color: var(--brown-800);
}

.section-desc {
  margin: 0.8rem 0 0;
  color: var(--ink-soft);
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem 1.4rem;
}

.feature {
  padding: 1.25rem 0 1.35rem;
  border-top: 1px solid var(--line);
}

.feature h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--brown-800);
}

.feature h3 i {
  font-style: normal;
  margin-left: 0.35rem;
  padding: 0.08rem 0.45rem;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 500;
  vertical-align: middle;
  color: #fff;
  background: linear-gradient(135deg, var(--gold-400), var(--gold-500));
}

.feature p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.feature-accent h3 {
  color: var(--brown-600);
}

.about {
  padding-bottom: 4rem;
}

.about-panel {
  padding: clamp(1.7rem, 4vw, 2.5rem);
  border-radius: calc(var(--radius) + 2px);
  border: 1px solid var(--line);
  background:
    radial-gradient(600px 240px at 0% 0%, rgba(193, 154, 107, 0.16), transparent 55%),
    linear-gradient(145deg, #fff, var(--blush));
}

.about-panel > p {
  margin: 1rem 0 0;
  max-width: 44rem;
  color: var(--ink-soft);
}

.about-panel strong {
  color: var(--brown-700);
}

.about-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.9rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.about-points li {
  padding: 0.85rem 0.95rem;
  border-left: 2px solid var(--gold-400);
  background: rgba(255, 255, 255, 0.7);
  color: var(--ink-soft);
  font-size: 0.93rem;
}

.enter {
  padding-bottom: 5rem;
}

.enter-panel {
  display: grid;
  grid-template-columns: 1.35fr 0.65fr;
  gap: 1.4rem;
  align-items: center;
  padding: clamp(1.5rem, 4vw, 2.3rem);
  border-radius: calc(var(--radius) + 4px);
  color: var(--blush);
  background:
    radial-gradient(500px 220px at 100% 0%, rgba(193, 154, 107, 0.28), transparent 55%),
    linear-gradient(135deg, var(--brown-700), var(--brown-800) 55%, var(--brown-900));
  box-shadow: 0 22px 48px rgba(56, 27, 9, 0.2);
}

.enter-copy .eyebrow {
  color: var(--gold-400);
}

.enter-copy h2 {
  color: var(--gold-200);
}

.enter-copy p:last-child {
  margin: 0.8rem 0 0;
  color: rgba(232, 212, 176, 0.78);
}

.enter-qr {
  display: flex;
  justify-content: center;
}

.qr-box {
  width: min(100%, 188px);
  aspect-ratio: 1;
  padding: 0.75rem;
  border-radius: 16px;
  background: #fff;
  box-shadow: inset 0 0 0 1px rgba(193, 154, 107, 0.35);
}

.qr-frame {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  text-align: center;
  color: var(--brown-800);
}

.qr-frame img {
  width: 78%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 6px;
}

.qr-frame span {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  line-height: 1.3;
}

.footer {
  margin-top: 0.5rem;
  padding: 1.8rem 0 2.4rem;
  background: linear-gradient(90deg, var(--brown-800), var(--brown-700));
  border-top: 1px solid rgba(193, 154, 107, 0.22);
  color: rgba(247, 240, 239, 0.55);
  font-size: 0.86rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.1rem;
  width: min(100% - 2.4rem, var(--max));
  margin: 0 auto;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.footer-brand img {
  width: 52px;
  height: auto;
}

.footer-brand strong {
  display: block;
  font-family: var(--font-display);
  letter-spacing: 0.1em;
  color: var(--gold-200);
}

.footer-brand span {
  color: rgba(247, 240, 239, 0.55);
}

.footer-legal a:hover {
  color: var(--gold-300);
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.65s ease, transform 0.65s ease;
  transition-delay: var(--d, 0ms);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes barRise {
  from {
    transform: scaleY(0.12);
    opacity: 0.4;
  }
  to {
    transform: scaleY(1);
    opacity: 1;
  }
}

@keyframes ringDrift {
  0%, 100% { transform: translate3d(0, 0, 0) rotate(0deg); }
  50% { transform: translate3d(0, 14px, 0) rotate(5deg); }
}

@keyframes washDrift {
  from { opacity: 0.75; transform: translateX(0); }
  to { opacity: 1; transform: translateX(-1.5%); }
}

@media (max-width: 920px) {
  .hero {
    min-height: auto;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    padding-top: 2.4rem;
    padding-bottom: 3.2rem;
  }

  .hero-visual {
    order: -1;
  }

  .note-plate {
    width: min(100%, 340px);
    transform: none;
  }

  .pillars {
    grid-template-columns: repeat(2, 1fr);
    margin-top: -1.6rem;
  }

  .pillar {
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .pillar:nth-child(2n) {
    border-right: 0;
  }

  .pillar:nth-child(3),
  .pillar:nth-child(4) {
    border-bottom: 0;
  }

  .feature-list,
  .about-points,
  .enter-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .nav-links a:not(.nav-cta) {
    display: none;
  }

  .hero-brand {
    letter-spacing: 0.08em;
  }

  .hero-headline {
    letter-spacing: 0.1em;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-copy,
  .hero-visual,
  .note-chart span,
  .hero-mesh,
  .hero-wash,
  .reveal {
    animation: none !important;
    transition: none !important;
    opacity: 1;
    transform: none;
  }
}