:root {
  --bg: #0f1c18;
  --bg-soft: #162822;
  --ink: #f4efe6;
  --ink-muted: rgba(244, 239, 230, 0.72);
  --accent: #c8a25a;
  --accent-soft: rgba(200, 162, 90, 0.18);
  --line: rgba(244, 239, 230, 0.14);
  --forest: #1f4a3a;
  --mist: #8fb3a4;
  --header-h: 72px;
  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-body: "Sora", "PingFang SC", "Hiragino Sans GB", "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;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(143, 179, 164, 0.16), transparent 60%),
    radial-gradient(900px 500px at 0% 30%, rgba(31, 74, 58, 0.55), transparent 55%),
    var(--bg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 4vw, 56px);
  background: linear-gradient(to bottom, rgba(15, 28, 24, 0.72), rgba(15, 28, 24, 0));
  backdrop-filter: blur(0px);
  transition: background 0.35s var(--ease), backdrop-filter 0.35s var(--ease);
}

.site-header.is-scrolled {
  background: rgba(15, 28, 24, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.brand-mark {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand-en {
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  color: var(--accent);
  font-weight: 500;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.5vw, 28px);
}

.nav a {
  font-size: 0.92rem;
  color: var(--ink-muted);
  transition: color 0.25s var(--ease);
}

.nav a:hover {
  color: var(--ink);
}

.nav-cta {
  padding: 8px 14px;
  border: 1px solid rgba(200, 162, 90, 0.55);
  color: var(--accent) !important;
}

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  align-items: end;
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.06);
  animation: heroDrift 18s var(--ease) infinite alternate;
}

.hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(15, 28, 24, 0.35) 0%, rgba(15, 28, 24, 0.2) 35%, rgba(15, 28, 24, 0.88) 100%),
    linear-gradient(90deg, rgba(15, 28, 24, 0.55), transparent 55%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(920px, 100%);
  padding: calc(var(--header-h) + 40px) clamp(20px, 4vw, 56px) clamp(48px, 8vh, 96px);
  animation: riseIn 1s var(--ease) both;
}

.brand-hero {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 7vw, 4.8rem);
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.05;
}

.hero h1 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.4vw, 2.35rem);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.hero-lead {
  margin: 0 0 28px;
  max-width: 34em;
  color: var(--ink-muted);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 500;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease);
}

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

.btn-primary {
  background: var(--accent);
  color: #1a1408;
}

.btn-ghost {
  border-color: rgba(244, 239, 230, 0.35);
  color: var(--ink);
}

.section {
  padding: clamp(72px, 12vh, 120px) clamp(20px, 4vw, 56px);
}

.section-head {
  max-width: 640px;
  margin-bottom: clamp(36px, 6vw, 64px);
}

.section-head h2,
.about-panel h2,
.contact .section-head h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: 0.06em;
}

.section-head p {
  margin: 0;
  color: var(--ink-muted);
}

.product-rail {
  display: grid;
  gap: clamp(48px, 8vw, 88px);
}

.product {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.product-reverse {
  grid-template-columns: 0.9fr 1.1fr;
}

.product-reverse .product-visual {
  order: 2;
}

.product-visual {
  overflow: hidden;
  min-height: clamp(240px, 36vw, 420px);
  background: var(--bg-soft);
}

.product-visual img {
  width: 100%;
  height: 100%;
  min-height: inherit;
  object-fit: cover;
  transition: transform 0.8s var(--ease);
}

.product:hover .product-visual img {
  transform: scale(1.04);
}

.product-copy h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.product-copy p {
  margin: 0 0 18px;
  color: var(--ink-muted);
}

.product-copy ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.product-copy li {
  position: relative;
  padding-left: 18px;
  color: var(--mist);
}

.product-copy li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--accent);
}

.scenes {
  background:
    linear-gradient(180deg, transparent, rgba(22, 40, 34, 0.7)),
    var(--bg);
}

.scene-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.scene-list li {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 20px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.scene-num {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--accent);
  letter-spacing: 0.08em;
}

.scene-list h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
}

.scene-list p {
  margin: 0;
  color: var(--ink-muted);
}

.about-panel {
  max-width: 760px;
  padding: clamp(28px, 5vw, 48px) 0;
  border-left: 2px solid var(--accent);
  padding-left: clamp(20px, 3vw, 32px);
}

.about-panel p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 1.08rem;
}

.contact-row {
  display: grid;
  gap: 10px;
}

.contact-link {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2rem);
  color: var(--accent);
  letter-spacing: 0.02em;
  width: fit-content;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s var(--ease);
}

.contact-link:hover {
  border-color: var(--accent);
}

.contact-note {
  margin: 0;
  color: var(--ink-muted);
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  justify-content: space-between;
  align-items: center;
  padding: 28px clamp(20px, 4vw, 56px) 36px;
  border-top: 1px solid var(--line);
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.icp:hover {
  color: var(--ink);
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

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

@keyframes heroDrift {
  from {
    transform: scale(1.06) translate3d(0, 0, 0);
  }
  to {
    transform: scale(1.12) translate3d(-1.5%, -1%, 0);
  }
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 900px) {
  .nav a:not(.nav-cta) {
    display: none;
  }

  .product,
  .product-reverse {
    grid-template-columns: 1fr;
  }

  .product-reverse .product-visual {
    order: 0;
  }

  .scene-list li {
    grid-template-columns: 64px 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero-media img,
  .reveal,
  .hero-content {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}