:root {
  --ink: #2a241c;
  --ink-soft: #3d3428;
  --gold: #c5a059;
  --gold-deep: #a8843a;
  --gold-bright: #ddc07a;
  --champagne: #f4ebe0;
  --sand: #faf6f0;
  --foam: #fffdf9;
  --line: rgba(70, 55, 30, 0.12);
  --text: #2a241c;
  --muted: #7a6f60;
  --font-display: "ZCOOL XiaoWei", "Songti SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --header-h: 4.25rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  background: var(--foam);
  overflow-x: hidden;
}

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

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

strong {
  font-weight: 700;
}

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  opacity: 0.03;
  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");
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
  background: rgba(255, 253, 249, 0.78);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.35s var(--ease), background 0.35s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(255, 253, 249, 0.94);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  margin-right: auto;
}

.logo-mark-img {
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 0.4rem;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.45rem;
  letter-spacing: 0.08em;
  color: var(--ink);
}

.nav {
  display: flex;
  gap: 1.6rem;
}

.nav a {
  font-size: 0.95rem;
  color: var(--muted);
  transition: color 0.25s var(--ease);
}

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

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 0;
  background: transparent;
  padding: 0.55rem;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 0.35rem 0;
  background: var(--ink);
  transition: transform 0.3s var(--ease), opacity 0.3s;
}

.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);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--gold-bright), var(--gold-deep));
  color: #fffdf9;
  box-shadow: 0 10px 28px rgba(168, 132, 58, 0.28);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--gold), var(--ink-soft));
}

.btn-outline {
  border-color: rgba(255, 255, 255, 0.45);
  color: #fffdf9;
  background: rgba(255, 255, 255, 0.08);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.16);
}

.btn-ghost {
  border-color: var(--line);
  color: var(--ink-soft);
  background: transparent;
}

.btn-ghost:hover {
  border-color: var(--gold);
  color: var(--gold-deep);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: end;
  gap: clamp(2rem, 5vw, 4rem);
  padding:
    calc(var(--header-h) + clamp(2rem, 6vh, 4rem))
    clamp(1.25rem, 5vw, 4.5rem)
    clamp(3rem, 8vh, 5rem);
  color: #fffaf2;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    linear-gradient(155deg, #2a2218 0%, #4a3a28 38%, #8a6d3f 72%, #c5a059 100%);
}

.hero-glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 75% 20%, rgba(255, 230, 180, 0.35), transparent 45%),
    radial-gradient(ellipse at 20% 80%, rgba(255, 255, 255, 0.08), transparent 40%);
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(42px);
  opacity: 0.4;
  animation: drift 14s ease-in-out infinite alternate;
}

.hero-orb-a {
  width: min(48vw, 420px);
  height: min(48vw, 420px);
  top: 6%;
  right: 4%;
  background: radial-gradient(circle, #ffe6b0 0%, transparent 70%);
}

.hero-orb-b {
  width: min(36vw, 300px);
  height: min(36vw, 300px);
  bottom: 10%;
  left: 8%;
  background: radial-gradient(circle, #f0d9a0 0%, transparent 70%);
  animation-delay: -4s;
}

.hero-copy,
.hero-visual {
  position: relative;
  z-index: 1;
}

.brand-kicker {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
  letter-spacing: 0.28em;
  color: rgba(255, 246, 230, 0.72);
  animation: rise 0.9s var(--ease) both;
}

.hero-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(4.2rem, 11vw, 7.8rem);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: 0.12em;
  animation: rise 1s 0.08s var(--ease) both;
}

.hero-lead {
  margin: 1.2rem 0 0;
  font-size: clamp(1.2rem, 2.4vw, 1.55rem);
  color: rgba(255, 250, 240, 0.92);
  animation: rise 1s 0.16s var(--ease) both;
}

.hero-tags {
  margin: 0.55rem 0 0;
  font-size: 0.98rem;
  letter-spacing: 0.18em;
  color: rgba(255, 236, 200, 0.72);
  animation: rise 1s 0.2s var(--ease) both;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
  animation: rise 1s 0.24s var(--ease) both;
}

.hero-visual {
  display: flex;
  justify-content: flex-end;
  align-items: flex-end;
  animation: rise 1.1s 0.2s var(--ease) both;
}

.phone-frame {
  width: min(100%, 280px);
  border-radius: 1.6rem;
  overflow: hidden;
  background: #111;
  box-shadow:
    0 0 0 10px #1c1814,
    0 28px 60px rgba(20, 14, 8, 0.45);
}

.phone-frame img {
  width: 100%;
  height: auto;
  vertical-align: middle;
}

.hero-phone {
  width: min(100%, 300px);
  transform: translateY(0);
  animation: floatPhone 6s ease-in-out infinite;
}

/* Sections */
.section {
  padding: clamp(4.5rem, 10vh, 7.5rem) clamp(1.25rem, 5vw, 4.5rem);
}

.section-inner {
  max-width: 1120px;
  margin: 0 auto;
}

.section-eyebrow {
  margin: 0 0 0.55rem;
  font-size: 0.82rem;
  letter-spacing: 0.2em;
  color: var(--gold-deep);
}

.section-head {
  max-width: 40rem;
  margin-bottom: clamp(2rem, 5vw, 3.25rem);
}

.section-head h2 {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--ink);
  line-height: 1.2;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.product {
  background: linear-gradient(180deg, var(--foam), var(--sand));
}

.capability-row {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}

.capability-row li {
  padding: 1.6rem 1.2rem 1.6rem 0;
  border-bottom: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.capability-row li + li {
  padding-left: 1.2rem;
  border-left: 1px solid var(--line);
}

.capability-row strong {
  font-size: 1.1rem;
  color: var(--ink);
}

.capability-row span {
  color: var(--muted);
  font-size: 0.95rem;
}

.screens {
  background:
    radial-gradient(ellipse at 50% 0%, rgba(197, 160, 89, 0.12), transparent 55%),
    var(--foam);
}

.screen-rail {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 1.25rem;
  align-items: start;
}

.screen-item {
  margin: 0;
  text-align: center;
}

.screen-item .phone-frame {
  width: 100%;
  border-radius: 1.1rem;
  box-shadow:
    0 0 0 6px #1c1814,
    0 16px 36px rgba(20, 14, 8, 0.22);
}

.screen-item figcaption {
  margin-top: 0.85rem;
  font-size: 0.92rem;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
}

.about {
  background: var(--sand);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: clamp(2rem, 6vw, 4rem);
  align-items: end;
}

.about-aside {
  padding: 2rem 0 0.5rem;
  border-top: 1px solid var(--line);
}

.about-quote {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.35;
  letter-spacing: 0.06em;
  color: var(--gold-deep);
}

.about-meta {
  margin: 1rem 0 0;
  color: var(--muted);
  letter-spacing: 0.16em;
  font-size: 0.9rem;
}

.contact {
  background: linear-gradient(180deg, var(--sand), #efe4d4);
}

.contact-dl {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.75rem 2.5rem;
}

.contact-dl div {
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.contact-dl dt {
  margin: 0 0 0.35rem;
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.contact-dl dd {
  margin: 0;
  font-size: 1.05rem;
  color: var(--ink);
  word-break: break-all;
}

.contact-dl a {
  color: var(--gold-deep);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s;
}

.contact-dl a:hover {
  border-bottom-color: var(--gold-deep);
}

.sep {
  margin: 0 0.4rem;
  color: var(--muted);
}

.site-footer {
  background: #241e17;
  color: rgba(255, 246, 230, 0.78);
  padding: 2.5rem clamp(1.25rem, 5vw, 4.5rem) 2rem;
}

.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: grid;
  gap: 1rem;
}

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

.footer-brand strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.3rem;
  letter-spacing: 0.12em;
  color: #fff8ec;
}

.footer-brand span {
  font-size: 0.85rem;
  opacity: 0.75;
}

.footer-links {
  display: flex;
  gap: 1.25rem;
  margin: 0;
  font-size: 0.92rem;
}

.footer-links a:hover {
  color: var(--gold-bright);
}

.icp a {
  color: rgba(255, 246, 230, 0.7);
  font-size: 0.9rem;
}

.icp a:hover {
  color: var(--gold-bright);
}

.copyright {
  margin: 0;
  font-size: 0.85rem;
  opacity: 0.55;
}

/* Legal pages */
.legal-main {
  max-width: 760px;
  margin: 0 auto;
  padding: calc(var(--header-h) + 3rem) clamp(1.25rem, 5vw, 3rem) 4rem;
}

.legal-main h1 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.6rem);
  letter-spacing: 0.08em;
}

.legal-main .legal-meta {
  color: var(--muted);
  margin-bottom: 2rem;
}

.legal-main h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.15rem;
  color: var(--ink);
}

.legal-main p,
.legal-main li {
  color: var(--muted);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

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

@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(-24px, 18px) scale(1.08); }
}

@keyframes floatPhone {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@media (max-width: 1100px) {
  .screen-rail {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
    align-items: start;
    padding-bottom: 3rem;
  }

  .hero-visual {
    justify-content: flex-start;
  }

  .capability-row {
    grid-template-columns: 1fr 1fr;
  }

  .capability-row li + li {
    border-left: 0;
    padding-left: 0;
  }

  .capability-row li:nth-child(even) {
    padding-left: 1.2rem;
    border-left: 1px solid var(--line);
  }

  .about-grid,
  .contact-dl {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .nav,
  .header-cta {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .site-header.is-open .nav {
    display: flex;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 1.25rem 1.25rem;
    background: rgba(255, 253, 249, 0.98);
    border-bottom: 1px solid var(--line);
  }

  .site-header.is-open .nav a {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--line);
  }

  .site-header.is-open .header-cta {
    display: inline-flex;
    position: absolute;
    top: calc(var(--header-h) + 13.5rem);
    left: 1.25rem;
  }

  .screen-rail {
    grid-template-columns: repeat(2, 1fr);
  }

  .capability-row {
    grid-template-columns: 1fr;
  }

  .capability-row li,
  .capability-row li:nth-child(even) {
    padding-left: 0;
    border-left: 0;
  }

  .hero-title {
    letter-spacing: 0.06em;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

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