:root {
  --ink: #1a1814;
  --ink-soft: #4a453c;
  --muted: #7a7368;
  --paper: #f7f3ec;
  --paper-2: #efe8dc;
  --accent: #0d6b5c;
  --accent-deep: #084c41;
  --accent-soft: #c5e4dc;
  --line: rgba(26, 24, 20, 0.12);
  --hero-from: #0b3d36;
  --hero-mid: #14685a;
  --hero-to: #1f8a76;
  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-body: "Outfit", "PingFang SC", "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);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.65;
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

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

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 50% at 100% 0%, rgba(13, 107, 92, 0.08), transparent 55%),
    radial-gradient(ellipse 60% 40% at 0% 100%, rgba(196, 154, 90, 0.1), transparent 50%),
    var(--paper);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem clamp(1.25rem, 4vw, 3rem);
  background: linear-gradient(to bottom, rgba(11, 61, 54, 0.55), transparent);
  color: #f4f7f5;
  mix-blend-mode: normal;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.nav {
  display: flex;
  gap: 1.5rem;
}

.nav a {
  font-size: 0.9rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  opacity: 0.88;
  transition: opacity 0.25s var(--ease);
}

.nav a:hover {
  opacity: 1;
}

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  place-items: end start;
  overflow: hidden;
  color: #f4f7f5;
}

.hero-media {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(160deg, var(--hero-from) 0%, var(--hero-mid) 48%, var(--hero-to) 100%);
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to top, rgba(8, 40, 35, 0.72) 0%, rgba(8, 40, 35, 0.18) 42%, transparent 70%),
    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)' opacity='0.35'/%3E%3C/svg%3E");
  opacity: 0.55;
  mix-blend-mode: soft-light;
  pointer-events: none;
}

.hero-grain {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 18% 28%, rgba(255, 255, 255, 0.14), transparent 28%),
    radial-gradient(circle at 78% 18%, rgba(255, 214, 160, 0.12), transparent 24%);
  animation: drift 18s ease-in-out infinite alternate;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.45;
  animation: float 12s var(--ease) infinite;
}

.hero-orb--a {
  width: min(48vw, 420px);
  height: min(48vw, 420px);
  top: 12%;
  right: 8%;
  background: radial-gradient(circle, #7ed9c4 0%, transparent 70%);
}

.hero-orb--b {
  width: min(36vw, 300px);
  height: min(36vw, 300px);
  bottom: 18%;
  left: 10%;
  background: radial-gradient(circle, #e8c27a 0%, transparent 70%);
  animation-delay: -4s;
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(720px, 100%);
  padding: clamp(5.5rem, 12vh, 8rem) clamp(1.25rem, 4vw, 3rem) clamp(3.5rem, 8vh, 5.5rem);
}

.brand {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.12em;
}

.hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.2vw, 1.85rem);
  font-weight: 400;
  letter-spacing: 0.18em;
  opacity: 0.92;
}

.lede {
  margin: 0 0 2rem;
  max-width: 32rem;
  font-size: 1.05rem;
  font-weight: 300;
  line-height: 1.75;
  color: rgba(244, 247, 245, 0.86);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0 1.35rem;
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

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

.btn-primary {
  background: #f4f7f5;
  color: var(--accent-deep);
}

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

.btn-ghost {
  border-color: rgba(244, 247, 245, 0.45);
  color: #f4f7f5;
}

.btn-ghost:hover {
  border-color: #f4f7f5;
  background: rgba(244, 247, 245, 0.08);
}

.section {
  padding: clamp(4rem, 10vh, 6.5rem) clamp(1.25rem, 4vw, 3rem);
}

.section-inner {
  max-width: 720px;
  margin: 0 auto;
}

.section h2 {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 3vw, 2.1rem);
  font-weight: 600;
  letter-spacing: 0.08em;
}

.section-desc,
.about p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.about {
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 100%);
}

.services {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.service-list {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 2rem;
}

.service-list h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent-deep);
}

.service-list p {
  margin: 0;
  color: var(--ink-soft);
}

.contact-list {
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.35rem;
}

.contact-list div {
  display: grid;
  gap: 0.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.contact-list dt {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.contact-list dd {
  margin: 0;
  font-size: 1.1rem;
}

.contact-list a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.site-footer {
  padding: 2.5rem clamp(1.25rem, 4vw, 3rem) 2rem;
  text-align: center;
  border-top: 1px solid var(--line);
  background: #ebe4d8;
}

.footer-brand {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.14em;
}

.footer-copy,
.footer-icp {
  margin: 0.35rem 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.footer-icp a:hover {
  color: var(--accent-deep);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  animation: rise 0.9s var(--ease) forwards;
}

.reveal-delay-1 { animation-delay: 0.12s; }
.reveal-delay-2 { animation-delay: 0.24s; }
.reveal-delay-3 { animation-delay: 0.36s; }

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

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-18px, 22px) scale(1.06); }
}

@keyframes drift {
  from { transform: translate(0, 0); }
  to { transform: translate(-2%, 1.5%); }
}

@media (max-width: 640px) {
  .site-header {
    padding-top: 0.95rem;
    padding-bottom: 0.95rem;
  }

  .nav {
    gap: 1rem;
  }

  .nav a {
    font-size: 0.82rem;
  }

  .brand {
    letter-spacing: 0.08em;
  }

  .hero h1 {
    letter-spacing: 0.1em;
  }

  .service-list {
    gap: 1.6rem;
  }
}

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

  .reveal,
  .hero-grain,
  .hero-orb {
    animation: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .btn:hover {
    transform: none;
  }
}