:root {
  --bg: #f3f6f4;
  --bg-2: #e7eee9;
  --ink: #14201c;
  --muted: #5c6f66;
  --line: rgba(20, 32, 28, 0.1);
  --accent: #2f6b57;
  --accent-soft: #d8ebe2;
  --warm: #d4553a;
  --hero-ink: #f7faf8;
  --font-display: "Bricolage Grotesque", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", 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-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
}

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

.wrap {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 5rem;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
  transition: background 0.35s var(--ease), box-shadow 0.35s;
}

.site-header.is-solid {
  background: rgba(243, 246, 244, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--line);
}

.logo {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.12rem;
  line-height: 1;
  color: var(--hero-ink);
  transition: color 0.3s;
}

.logo-zh {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 3vw, 1.95rem);
  letter-spacing: 0.06em;
}

.logo-en {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.68rem;
  letter-spacing: 0.28em;
  text-transform: lowercase;
  color: rgba(247, 250, 248, 0.65);
  transition: color 0.3s;
}

.site-header.is-solid .logo {
  color: var(--ink);
}

.site-header.is-solid .logo-en {
  color: var(--muted);
}

.site-nav {
  display: flex;
  gap: 1.75rem;
}

.site-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: rgba(247, 250, 248, 0.82);
  transition: color 0.25s;
}

.site-nav a:hover {
  color: #fff;
}

.site-header.is-solid .site-nav a {
  color: var(--muted);
}

.site-header.is-solid .site-nav a:hover {
  color: var(--accent);
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 1.25rem;
  height: 2px;
  margin: 6px auto;
  background: currentColor;
  color: var(--hero-ink);
  transition: transform 0.3s var(--ease);
}

.site-header.is-solid .nav-toggle span {
  color: var(--ink);
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  place-items: end start;
  overflow: hidden;
  color: var(--hero-ink);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: #1a4a3c;
}

.hero-slide {
  position: absolute;
  inset: 0;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  transform: scale(1.04);
  animation: hero-kenburns 18s ease-in-out infinite alternate;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10, 28, 22, 0.28) 0%, rgba(10, 28, 22, 0.45) 45%, rgba(10, 28, 22, 0.88) 100%),
    linear-gradient(90deg, rgba(10, 28, 22, 0.35) 0%, transparent 55%);
}

.hero-grain {
  position: absolute;
  inset: 0;
  opacity: 0.14;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  pointer-events: none;
}

@keyframes hero-kenburns {
  from { transform: scale(1.04) translate(0, 0); }
  to { transform: scale(1.1) translate(-1.5%, 1%); }
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(860px, 100%);
  padding: 0 clamp(1.25rem, 4vw, 2.5rem) clamp(5rem, 12vh, 7.5rem);
  animation: rise 1s var(--ease) both;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.brand {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(3.2rem, 11vw, 6.5rem);
  line-height: 0.95;
  letter-spacing: 0.06em;
}

.hero h1 {
  margin: 0 0 0.9rem;
  max-width: 12em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.25rem, 2.8vw, 1.85rem);
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: rgba(247, 250, 248, 0.92);
}

.lead {
  margin: 0 0 1.8rem;
  max-width: 28em;
  color: rgba(220, 232, 226, 0.82);
  font-size: 1.05rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  min-height: 3rem;
  padding: 0 1.35rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  background: #f3f6f4;
  color: var(--ink);
  transition: transform 0.25s var(--ease), background 0.25s;
}

.btn:hover {
  transform: translateY(-2px);
  background: #fff;
}

/* Games */
.games {
  padding: clamp(4rem, 9vw, 6.5rem) 0;
  background:
    linear-gradient(180deg, #dfe8e2 0%, var(--bg) 18%, var(--bg) 100%);
}

.block-title {
  margin-bottom: 2.5rem;
}

.block-title h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: 0.04em;
}

.block-title p {
  margin: 0;
  color: var(--muted);
  max-width: 32em;
}

.game-list {
  display: grid;
  gap: 1.75rem;
}

.game {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 0;
  background: #fff;
  overflow: hidden;
  cursor: default;
  transition: transform 0.35s var(--ease), box-shadow 0.35s;
}

.game.is-linked {
  cursor: pointer;
}

.game.is-linked:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px rgba(20, 32, 28, 0.08);
}

.game.is-linked:hover .game-action {
  color: var(--warm);
}

.game-art {
  min-height: 240px;
  position: relative;
  background-color: #1a2a24;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}

.game-art::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(20, 32, 28, 0.12));
  pointer-events: none;
}

.game-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(1.5rem, 4vw, 2.5rem);
}

.game-body h3 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.game-body p {
  margin: 0 0 1.25rem;
  color: var(--muted);
}

.game-action {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  color: var(--accent);
  transition: color 0.25s;
}

/* About */
.about {
  padding: clamp(4rem, 9vw, 6.5rem) 0;
  background: var(--bg-2);
}

.about-intro {
  margin-bottom: clamp(2rem, 5vw, 3rem);
  padding-bottom: clamp(1.5rem, 4vw, 2.25rem);
  border-bottom: 1px solid var(--line);
}

.about-intro p {
  margin: 0;
  max-width: 52em;
  font-size: 1.08rem;
  color: var(--ink);
  line-height: 1.85;
}

.about-sections {
  display: grid;
  gap: clamp(2rem, 5vw, 3rem);
}

.about-block h3 {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.5vw, 1.55rem);
  font-weight: 800;
  letter-spacing: 0.04em;
}

.about-block h3 span {
  font-size: 0.85em;
  color: var(--accent);
  letter-spacing: 0.08em;
}

.about-block h4 {
  margin: 1.5rem 0 0.85rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--ink);
}

.about-block > p {
  margin: 0;
  max-width: 52em;
  color: var(--muted);
  line-height: 1.8;
}

.product-matrix,
.advantage-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.15rem;
}

.product-matrix li,
.advantage-list li {
  display: grid;
  gap: 0.4rem;
  padding: 1.1rem 0 0;
  border-top: 1px solid var(--line);
}

.product-matrix li:first-child,
.advantage-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.product-matrix strong,
.advantage-list strong {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.product-matrix span,
.advantage-list span {
  color: var(--muted);
  line-height: 1.8;
  font-size: 0.98rem;
}

.advantage-list {
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.advantage-list li {
  border-top: 0;
  padding: 0;
  padding-top: 0.85rem;
  border-top: 2px solid var(--accent);
}

/* Contact */
.contact {
  padding: clamp(3.5rem, 8vw, 5.5rem) 0;
  background: var(--ink);
  color: var(--hero-ink);
}

.contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
}

.contact h2 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.5vw, 2.3rem);
  font-weight: 800;
  letter-spacing: 0.04em;
}

.contact p {
  margin: 0;
  color: rgba(220, 232, 226, 0.72);
}

.mail {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.15rem, 2.5vw, 1.5rem);
  letter-spacing: 0.03em;
  border-bottom: 1px solid rgba(247, 250, 248, 0.35);
  padding-bottom: 0.2rem;
  transition: color 0.25s, border-color 0.25s;
}

.mail:hover {
  color: #9ed9bf;
  border-color: #9ed9bf;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding: 1.25rem clamp(1.25rem, 4vw, 2.5rem);
  background: #0e1714;
  color: rgba(220, 232, 226, 0.5);
  font-size: 0.88rem;
}

.site-footer .beian {
  color: rgba(220, 232, 226, 0.5);
  transition: color 0.25s;
}

.site-footer .beian:hover {
  color: #9ed9bf;
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

@media (max-width: 860px) {
  .game {
    grid-template-columns: 1fr;
  }

  .game-art {
    min-height: 200px;
  }

  .advantage-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: block;
    color: var(--hero-ink);
  }

  .site-nav {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    background: rgba(20, 32, 28, 0.97);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
  }

  .site-nav.is-open {
    opacity: 1;
    visibility: visible;
  }

  .site-nav a {
    color: #f7faf8 !important;
    font-size: 1.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-slide,
  .hero-inner,
  .reveal {
    animation: none !important;
    transition: none !important;
    opacity: 1;
    transform: none;
  }
}