:root {
  --bg: #0c1210;
  --bg-elev: #121a17;
  --ink: #eef3ef;
  --muted: #9aaba2;
  --accent: #c4a574;
  --accent-soft: rgba(196, 165, 116, 0.18);
  --line: rgba(238, 243, 239, 0.1);
  --green-glow: #2f6b55;
  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-body: "DM Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  --max: 1120px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  background:
    radial-gradient(1200px 700px at 80% -10%, rgba(47, 107, 85, 0.35), transparent 55%),
    radial-gradient(900px 600px at -10% 20%, rgba(196, 165, 116, 0.12), transparent 50%),
    linear-gradient(180deg, #0a0f0d 0%, var(--bg) 40%, #0e1512 100%);
  overflow-x: hidden;
}

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

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

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  opacity: 0.045;
  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='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem clamp(1.2rem, 4vw, 2.5rem);
  background: linear-gradient(180deg, rgba(12, 18, 16, 0.88), rgba(12, 18, 16, 0));
  backdrop-filter: blur(8px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  min-width: 2.6rem;
  height: 2.6rem;
  padding: 0 0.35rem;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.nav {
  display: flex;
  gap: 1.4rem;
}

.nav a {
  color: var(--muted);
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  transition: color 0.3s var(--ease);
}

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

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  align-items: end;
  padding: clamp(5.5rem, 12vh, 8rem) clamp(1.2rem, 4vw, 2.5rem) clamp(3rem, 8vh, 5rem);
  isolation: isolate;
}

.hero-visual {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background:
    linear-gradient(180deg, transparent 35%, rgba(12, 18, 16, 0.75) 78%, var(--bg) 100%),
    linear-gradient(110deg, #0c1210 0%, #15241e 45%, #1a2c24 70%, #0f1613 100%);
}

.hero-grid {
  position: absolute;
  inset: -20%;
  background-image:
    linear-gradient(rgba(238, 243, 239, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(238, 243, 239, 0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  transform: perspective(800px) rotateX(58deg) translateY(-8%);
  mask-image: radial-gradient(ellipse at 50% 30%, #000 20%, transparent 70%);
  animation: gridDrift 28s linear infinite;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.55;
  animation: orbFloat 12s var(--ease) infinite alternate;
}

.hero-orb-a {
  width: min(48vw, 520px);
  height: min(48vw, 520px);
  right: -6%;
  top: 8%;
  background: radial-gradient(circle at 35% 35%, #3d8f6e, transparent 65%);
}

.hero-orb-b {
  width: min(36vw, 380px);
  height: min(36vw, 380px);
  left: 8%;
  top: 28%;
  background: radial-gradient(circle at 40% 40%, rgba(196, 165, 116, 0.55), transparent 68%);
  animation-delay: -4s;
}

.hero-shine {
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 40%, rgba(238, 243, 239, 0.06) 50%, transparent 60%);
  background-size: 220% 100%;
  animation: shineSweep 9s var(--ease) infinite;
}

.hero-copy {
  max-width: 780px;
  animation: riseIn 1.1s var(--ease) both;
}

.brand-hero {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7vw, 4.8rem);
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.05;
  color: var(--ink);
  text-shadow: 0 0 60px rgba(47, 107, 85, 0.35);
}

.hero h1 {
  margin: 0 0 1rem;
  max-width: 16ch;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3.2vw, 2.15rem);
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: 0.02em;
}

.lede {
  margin: 0 0 2rem;
  max-width: 36rem;
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.12rem);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.9rem;
  padding: 0 1.35rem;
  border: 1px solid transparent;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  transition: transform 0.35s var(--ease), background 0.35s var(--ease), border-color 0.35s var(--ease), color 0.35s var(--ease);
}

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

.btn-primary {
  background: var(--accent);
  color: #1a140c;
  font-weight: 600;
}

.btn-primary:hover {
  background: #d4b88a;
}

.btn-ghost {
  border-color: var(--line);
  color: var(--ink);
  background: rgba(238, 243, 239, 0.03);
}

.btn-ghost:hover {
  border-color: rgba(238, 243, 239, 0.28);
}

/* ===== SECTIONS ===== */
.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(4rem, 10vh, 7rem) clamp(1.2rem, 4vw, 2.5rem);
}

.section-head {
  max-width: 40rem;
  margin-bottom: clamp(2rem, 5vh, 3.2rem);
}

.eyebrow {
  margin: 0 0 0.7rem;
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.section-head h2 {
  margin: 0 0 0.9rem;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3vw, 2.2rem);
  font-weight: 700;
  line-height: 1.3;
}

.section-desc {
  margin: 0;
  color: var(--muted);
}

.poster-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.poster {
  margin: 0;
  padding: clamp(1.5rem, 3vw, 2.2rem);
  background: rgba(18, 26, 23, 0.92);
  min-height: 14rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  transition: background 0.4s var(--ease);
}

.poster:hover {
  background: #17231e;
}

.poster-num {
  display: block;
  margin-bottom: auto;
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.12em;
}

.poster h3 {
  margin: 1.2rem 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
}

.poster p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

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

.cap-list li {
  display: grid;
  grid-template-columns: minmax(8rem, 12rem) 1fr;
  gap: 1rem 2rem;
  align-items: baseline;
  padding: 1.35rem 0;
  border-bottom: 1px solid var(--line);
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.cap-list li.is-in {
  opacity: 1;
  transform: none;
}

.cap-list strong {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
}

.cap-list span {
  color: var(--muted);
}

.contact-panel {
  padding: clamp(1.8rem, 4vw, 2.6rem) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.contact-mail {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  background: linear-gradient(90deg, var(--ink), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  transition: letter-spacing 0.4s var(--ease);
}

.contact-mail:hover {
  letter-spacing: 0.04em;
}

.contact-meta {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

/* ===== FOOTER / ICP ===== */
.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 3rem clamp(1.2rem, 4vw, 2.5rem) 2.4rem;
  display: grid;
  gap: 2rem;
  border-top: 1px solid var(--line);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer-brand strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.05rem;
}

.footer-brand p {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.beian {
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.8;
}

.beian p {
  margin: 0.15rem 0;
}

.beian a {
  color: #c9d5ce;
  border-bottom: 1px solid rgba(201, 213, 206, 0.35);
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.beian a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.beian .sep {
  margin: 0 0.4rem;
  opacity: 0.5;
}

.copy {
  margin-top: 0.6rem !important;
  opacity: 0.8;
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes orbFloat {
  from {
    transform: translate3d(0, 0, 0) scale(1);
  }
  to {
    transform: translate3d(-18px, 24px, 0) scale(1.06);
  }
}

@keyframes gridDrift {
  from {
    background-position: 0 0;
  }
  to {
    background-position: 72px 72px;
  }
}

@keyframes shineSweep {
  0%,
  40% {
    background-position: 120% 0;
  }
  100% {
    background-position: -40% 0;
  }
}

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

  .cap-list li {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .nav {
    gap: 1rem;
  }

  .nav a {
    font-size: 0.85rem;
  }
}

@media (max-width: 520px) {
  .topbar {
    padding-top: 0.9rem;
  }

  .brand-name {
    display: none;
  }

  .hero {
    align-items: center;
  }

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

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

  .hero-copy,
  .hero-orb,
  .hero-grid,
  .hero-shine,
  .cap-list li {
    animation: none !important;
    transition: none !important;
    opacity: 1;
    transform: none;
  }
}