/* ============================================================
   FAYU INTELLIGENT TECHNOLOGY — Luxury Website Stylesheet
   Palette: Deep Navy + Champagne Gold + Warm Cream
   ============================================================ */

/* ---------- RESET & BASE ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Colors */
  --navy-900: #050a14;
  --navy-800: #0a1628;
  --navy-700: #0f1f38;
  --navy-600: #16294a;
  --navy-500: #1e3556;
  --gold-300: #e8d4a0;
  --gold-400: #d4b876;
  --gold-500: #c9a961;
  --gold-600: #b08d3f;
  --gold-700: #8a6d2f;
  --cream:    #f5f0e6;
  --cream-dim:#d8d0c0;
  --white:    #ffffff;
  --white-80: rgba(255,255,255,0.8);
  --white-60: rgba(255,255,255,0.6);
  --white-40: rgba(255,255,255,0.4);
  --white-20: rgba(255,255,255,0.2);
  --white-10: rgba(255,255,255,0.1);
  --white-05: rgba(255,255,255,0.05);
  --line: rgba(201,169,97,0.25);
  --line-strong: rgba(201,169,97,0.5);

  /* Typography */
  --font-serif-cn: 'Noto Serif SC', 'Songti SC', serif;
  --font-serif-en: 'Cormorant Garamond', 'Times New Roman', serif;
  --font-sans-cn:  'Noto Sans SC', 'PingFang SC', sans-serif;
  --font-sans-en:  'Inter', 'Helvetica Neue', sans-serif;

  /* Layout */
  --container: 1280px;
  --gutter: 32px;
  --radius: 4px;
  --radius-lg: 8px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans-cn);
  font-weight: 300;
  line-height: 1.7;
  color: var(--cream);
  background: var(--navy-900);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* ---------- CONTAINER ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- PRELOADER ---------- */
.preloader {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--navy-900);
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.8s var(--ease), visibility 0.8s var(--ease);
}
.preloader.is-hidden { opacity: 0; visibility: hidden; }
.preloader__inner { text-align: center; }
.preloader__logo {
  width: 120px; height: 100px;
  margin: 0 auto 1.5rem;
  display: flex; align-items: center; justify-content: center;
}
.preloader__logo img {
  width: 100%; height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 0 16px rgba(201,169,97,0.4));
  animation: logoPulse 2s var(--ease) infinite;
}
@keyframes logoPulse {
  0%, 100% { opacity: 0.85; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.04); }
}
.preloader__bar {
  width: 200px; height: 1px;
  background: var(--white-10);
  margin: 0 auto 1rem;
  overflow: hidden;
}
.preloader__bar span {
  display: block; height: 100%;
  background: linear-gradient(90deg, transparent, var(--gold-500), transparent);
  animation: preload 1.6s var(--ease) infinite;
}
@keyframes preload {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}
.preloader__text {
  font-family: var(--font-serif-cn);
  font-size: 0.875rem;
  letter-spacing: 0.4em;
  color: var(--white-60);
}

/* ---------- NAVIGATION ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 1.25rem 0;
  transition: all 0.4s var(--ease);
}
.nav.is-scrolled {
  padding: 0.75rem 0;
  background: rgba(5, 10, 20, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line);
}
.nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex; align-items: center; justify-content: space-between;
}
.nav__brand { display: flex; align-items: center; gap: 0.75rem; }
.nav__logo {
  width: 44px; height: 36px;
  object-fit: contain;
  transition: all 0.3s var(--ease);
  filter: drop-shadow(0 0 8px rgba(201,169,97,0.3));
}
.nav__brand:hover .nav__logo {
  transform: scale(1.05);
  filter: drop-shadow(0 0 12px rgba(201,169,97,0.5));
}
.nav__brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.nav__brand-cn {
  font-family: var(--font-serif-cn);
  font-size: 1rem; font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--cream);
}
.nav__brand-en {
  font-family: var(--font-sans-en);
  font-size: 0.625rem; font-weight: 400;
  letter-spacing: 0.25em;
  color: var(--gold-500);
}
.nav__menu { display: flex; align-items: center; gap: 2rem; }
.nav__link {
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--white-80);
  position: relative;
  padding: 0.25rem 0;
  transition: color 0.3s var(--ease);
}
.nav__link::after {
  content: '';
  position: absolute; bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: var(--gold-500);
  transition: width 0.3s var(--ease);
}
.nav__link:hover { color: var(--gold-500); }
.nav__link:hover::after { width: 100%; }
.nav__link--cta {
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--gold-500);
  color: var(--gold-500);
  border-radius: 2px;
}
.nav__link--cta::after { display: none; }
.nav__link--cta:hover {
  background: var(--gold-500);
  color: var(--navy-900);
}
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.nav__toggle span {
  width: 24px; height: 1.5px;
  background: var(--cream);
  transition: all 0.3s var(--ease);
}
.nav__toggle.is-active span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__toggle.is-active span:nth-child(2) { opacity: 0; }
.nav__toggle.is-active span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.875rem 2rem;
  font-family: var(--font-sans-cn);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  border-radius: 2px;
  transition: all 0.4s var(--ease);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.btn--gold {
  background: linear-gradient(135deg, var(--gold-500), var(--gold-600));
  color: var(--navy-900);
  border: 1px solid var(--gold-500);
}
.btn--gold:hover {
  background: linear-gradient(135deg, var(--gold-400), var(--gold-500));
  transform: translateY(-2px);
  box-shadow: 0 10px 30px -10px rgba(201,169,97,0.5);
}
.btn--ghost {
  background: transparent;
  color: var(--cream);
  border: 1px solid var(--white-20);
}
.btn--ghost:hover {
  border-color: var(--gold-500);
  color: var(--gold-500);
  transform: translateY(-2px);
}

/* ---------- SECTION COMMON ---------- */
.section {
  position: relative;
  padding: 8rem 0;
}
.section__head {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  margin-bottom: 4rem;
}
.section__head--center {
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.section__index {
  font-family: var(--font-serif-en);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--gold-500);
  padding-top: 0.5rem;
  border-top: 1px solid var(--gold-500);
  min-width: 40px;
  text-align: center;
}
.section__heading { flex: 1; }
.section__head--center .section__heading { max-width: 720px; }
.section__eyebrow {
  display: inline-block;
  font-family: var(--font-sans-en);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  color: var(--gold-500);
  margin-bottom: 1rem;
}
.section__eyebrow--light { color: var(--gold-400); }
.section__title {
  font-family: var(--font-serif-cn);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--cream);
  line-height: 1.2;
}
.section__sub {
  margin-top: 1rem;
  font-size: 1rem;
  color: var(--white-60);
  font-weight: 300;
}

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  transform: scale(1.1);
  animation: heroZoom 20s var(--ease) infinite alternate;
}
@keyframes heroZoom {
  0% { transform: scale(1.1) translateY(0); }
  100% { transform: scale(1.2) translateY(-2%); }
}
.hero__overlay {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at center, rgba(10,22,40,0.4) 0%, rgba(5,10,20,0.85) 70%, rgba(5,10,20,0.95) 100%),
    linear-gradient(180deg, rgba(5,10,20,0.6) 0%, rgba(5,10,20,0.3) 50%, rgba(5,10,20,0.9) 100%);
}
.hero__grain {
  position: absolute; inset: 0;
  opacity: 0.04;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
}
.hero__content {
  position: relative; z-index: 2;
  max-width: 900px;
  padding: 0 var(--gutter);
}
.hero__logo {
  width: 140px; height: 115px;
  margin: 0 auto 2.5rem;
  display: flex; align-items: center; justify-content: center;
}
.hero__logo img {
  width: 100%; height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 0 24px rgba(201,169,97,0.45));
  animation: heroLogoIn 1.4s var(--ease-out) both;
}
@keyframes heroLogoIn {
  0% { opacity: 0; transform: translateY(20px) scale(0.92); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}
.hero__eyebrow {
  display: flex; align-items: center; justify-content: center;
  gap: 1.25rem;
  margin-bottom: 2rem;
  font-family: var(--font-sans-cn);
  font-size: 0.875rem;
  letter-spacing: 0.3em;
  color: var(--gold-400);
}
.hero__eyebrow-line {
  width: 60px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-500));
}
.hero__eyebrow-line:last-child {
  background: linear-gradient(90deg, var(--gold-500), transparent);
}
.hero__title {
  margin-bottom: 1.5rem;
}
.hero__title-cn {
  display: block;
  font-family: var(--font-serif-cn);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--cream);
  line-height: 1.1;
  text-shadow: 0 4px 30px rgba(0,0,0,0.5);
}
.hero__title-en {
  display: block;
  font-family: var(--font-serif-en);
  font-size: clamp(0.875rem, 1.5vw, 1.125rem);
  font-weight: 400;
  letter-spacing: 0.5em;
  color: var(--gold-500);
  margin-top: 1rem;
  padding-left: 0.5em;
}
.hero__subtitle {
  font-family: var(--font-serif-cn);
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  font-weight: 400;
  letter-spacing: 0.15em;
  color: var(--gold-300);
  margin-bottom: 1.5rem;
}
.hero__desc {
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--white-80);
  margin-bottom: 2.5rem;
  font-weight: 300;
}
.hero__actions {
  display: flex; gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}
.hero__scroll {
  position: absolute; bottom: 2rem; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center;
  gap: 0.75rem;
  z-index: 2;
}
.hero__scroll span {
  font-family: var(--font-sans-en);
  font-size: 0.625rem;
  letter-spacing: 0.4em;
  color: var(--white-60);
}
.hero__scroll-line {
  width: 1px; height: 50px;
  background: linear-gradient(180deg, var(--gold-500), transparent);
  position: relative;
  overflow: hidden;
}
.hero__scroll-line::after {
  content: '';
  position: absolute; top: 0; left: 0;
  width: 100%; height: 30%;
  background: var(--gold-300);
  animation: scrollDown 2s var(--ease) infinite;
}
@keyframes scrollDown {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(330%); }
}

/* ---------- ABOUT ---------- */
.section--about {
  background:
    linear-gradient(180deg, var(--navy-900) 0%, var(--navy-800) 100%);
  position: relative;
}
.section--about::before {
  content: '';
  position: absolute; top: 0; right: 0;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(201,169,97,0.08), transparent 70%);
  pointer-events: none;
}
.about__grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 5rem;
  align-items: center;
}
.about__text { position: relative; }
.about__lead {
  font-family: var(--font-serif-cn);
  font-size: 1.25rem;
  line-height: 1.9;
  color: var(--cream);
  margin-bottom: 1.75rem;
  font-weight: 400;
}
.about__lead em {
  font-style: normal;
  color: var(--gold-500);
  font-weight: 600;
}
.about__text p {
  margin-bottom: 1.5rem;
  color: var(--cream-dim);
  font-size: 0.9375rem;
  line-height: 1.9;
}
.about__text strong {
  color: var(--gold-400);
  font-weight: 600;
}
.about__signature {
  display: flex; align-items: center; gap: 1rem;
  margin-top: 2.5rem;
  font-family: var(--font-serif-cn);
  font-size: 0.875rem;
  letter-spacing: 0.15em;
  color: var(--gold-500);
}
.about__signature-line {
  width: 40px; height: 1px;
  background: var(--gold-500);
}
.about__visual {
  position: relative;
  height: 600px;
}
.about__img {
  position: absolute;
  overflow: hidden;
  border: 1px solid var(--line);
}
.about__img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 1s var(--ease);
}
.about__img:hover img { transform: scale(1.05); }
.about__img--main {
  top: 0; right: 0;
  width: 75%; height: 70%;
}
.about__img--sub {
  bottom: 0; left: 0;
  width: 55%; height: 45%;
  border: 4px solid var(--navy-800);
}
.about__badge {
  position: absolute;
  top: 50%; right: -1rem;
  transform: translateY(-50%);
  background: var(--navy-900);
  border: 1px solid var(--gold-500);
  padding: 1.5rem 1.75rem;
  text-align: center;
  z-index: 2;
}
.about__badge-year {
  display: block;
  font-family: var(--font-serif-en);
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--gold-500);
  line-height: 1;
}
.about__badge-label {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--white-60);
  margin-top: 0.5rem;
}

/* ---------- POSITIONING ---------- */
.section--positioning {
  background: var(--navy-900);
  position: relative;
}
.positioning__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 6rem;
}
.pos-card {
  position: relative;
  padding: 3rem 2rem;
  background: linear-gradient(180deg, var(--navy-800), var(--navy-900));
  border: 1px solid var(--white-05);
  transition: all 0.5s var(--ease);
  overflow: hidden;
}
.pos-card::before {
  content: '';
  position: absolute; top: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold-500), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s var(--ease);
}
.pos-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-6px);
  box-shadow: 0 20px 50px -20px rgba(0,0,0,0.5);
}
.pos-card:hover::before { transform: translateX(0); }
.pos-card__num {
  position: absolute;
  top: 1.5rem; right: 1.5rem;
  font-family: var(--font-serif-en);
  font-size: 3rem;
  font-weight: 300;
  color: var(--white-05);
  line-height: 1;
}
.pos-card__icon {
  width: 56px; height: 56px;
  color: var(--gold-500);
  margin-bottom: 1.75rem;
}
.pos-card__icon svg { width: 100%; height: 100%; }
.pos-card__title {
  font-family: var(--font-serif-cn);
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}
.pos-card__desc {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--cream-dim);
}

/* R&D */
.rnd {
  border-top: 1px solid var(--line);
  padding-top: 5rem;
}
.rnd__head { text-align: center; margin-bottom: 4rem; }
.rnd__title {
  font-family: var(--font-serif-cn);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 1rem;
}
.rnd__sub {
  color: var(--white-60);
  font-size: 1rem;
}
.rnd__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 4rem;
}
.rnd__item {
  position: relative;
  padding-left: 1.5rem;
  border-left: 1px solid var(--line);
}
.rnd__item-num {
  font-family: var(--font-serif-en);
  font-size: 1rem;
  font-weight: 500;
  color: var(--gold-500);
  letter-spacing: 0.2em;
  margin-bottom: 0.75rem;
}
.rnd__item h4 {
  font-family: var(--font-serif-cn);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 1rem;
}
.rnd__item p {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--cream-dim);
}
.rnd__partners {
  display: flex; align-items: center; gap: 2rem;
  flex-wrap: wrap;
  padding: 2rem;
  background: var(--navy-800);
  border: 1px solid var(--line);
}
.rnd__partners-label {
  font-family: var(--font-sans-en);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--gold-500);
}
.rnd__partners-list {
  display: flex; flex-wrap: wrap;
  gap: 1.5rem 2rem;
}
.rnd__partners-list span {
  font-family: var(--font-serif-cn);
  font-size: 1rem;
  font-weight: 500;
  color: var(--cream);
  position: relative;
  padding-left: 1rem;
}
.rnd__partners-list span::before {
  content: '';
  position: absolute; left: 0; top: 50%;
  transform: translateY(-50%);
  width: 6px; height: 6px;
  background: var(--gold-500);
  border-radius: 50%;
}

/* ---------- MARKET ---------- */
.section--market {
  background: linear-gradient(180deg, var(--navy-900), var(--navy-800));
  position: relative;
}
.market__intro {
  max-width: 900px;
  margin: 0 auto 4rem;
  text-align: center;
}
.market__intro p {
  font-size: 1rem;
  line-height: 2;
  color: var(--cream-dim);
  margin-bottom: 1.5rem;
}
.market__intro strong {
  color: var(--gold-500);
  font-weight: 600;
}
.market__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-bottom: 6rem;
  padding: 3rem 2rem;
  background: var(--navy-900);
  border: 1px solid var(--line);
  position: relative;
}
.market__stats::before, .market__stats::after {
  content: '';
  position: absolute;
  width: 30px; height: 30px;
  border: 1px solid var(--gold-500);
}
.market__stats::before {
  top: -1px; left: -1px;
  border-right: none; border-bottom: none;
}
.market__stats::after {
  bottom: -1px; right: -1px;
  border-left: none; border-top: none;
}
.stat { text-align: center; }
.stat__num {
  font-family: var(--font-serif-en);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 600;
  color: var(--gold-500);
  line-height: 1;
  margin-bottom: 0.75rem;
  display: flex; align-items: baseline; justify-content: center;
  gap: 0.25rem;
}
.stat__unit {
  font-size: 1rem;
  font-weight: 400;
  color: var(--gold-400);
}
.stat__label {
  font-size: 0.875rem;
  color: var(--white-60);
  letter-spacing: 0.05em;
}

.market__drivers-title,
.market__adv-title {
  font-family: var(--font-serif-cn);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 600;
  color: var(--cream);
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}
.market__drivers-title::after,
.market__adv-title::after {
  content: '';
  display: block;
  width: 60px; height: 1px;
  background: var(--gold-500);
  margin: 1rem auto 0;
}
.market__drivers { margin-bottom: 6rem; }
.market__drivers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.driver {
  padding: 2.5rem 2rem;
  background: var(--navy-900);
  border: 1px solid var(--white-05);
  transition: all 0.4s var(--ease);
}
.driver:hover {
  border-color: var(--gold-500);
  transform: translateY(-4px);
}
.driver__icon {
  font-family: var(--font-serif-en);
  font-size: 2rem;
  font-weight: 600;
  color: var(--gold-500);
  margin-bottom: 1rem;
}
.driver h4 {
  font-family: var(--font-serif-cn);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 0.75rem;
}
.driver p {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--cream-dim);
}

.market__adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.adv-card {
  position: relative;
  padding: 2.5rem 2rem;
  background: linear-gradient(180deg, var(--navy-800), var(--navy-900));
  border: 1px solid var(--line);
  transition: all 0.4s var(--ease);
}
.adv-card:hover {
  border-color: var(--gold-500);
  box-shadow: 0 15px 40px -15px rgba(201,169,97,0.3);
}
.adv-card__num {
  position: absolute;
  top: 1.5rem; right: 1.5rem;
  font-family: var(--font-serif-en);
  font-size: 2.5rem;
  font-weight: 300;
  color: var(--gold-600);
  opacity: 0.4;
}
.adv-card h4 {
  font-family: var(--font-serif-cn);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gold-400);
  margin-bottom: 1rem;
}
.adv-card p {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--cream-dim);
}

/* ---------- PRODUCT ---------- */
.section--product {
  background: var(--navy-900);
  position: relative;
}
.section--product::before {
  content: '';
  position: absolute; top: 10%; left: -10%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(201,169,97,0.06), transparent 70%);
  pointer-events: none;
}
.product__hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-bottom: 6rem;
}
.product__hero-name {
  font-family: var(--font-serif-cn);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--cream);
  margin-bottom: 0.75rem;
  letter-spacing: 0.05em;
}
.product__hero-tag {
  font-family: var(--font-serif-cn);
  font-size: 1.125rem;
  color: var(--gold-500);
  margin-bottom: 2.5rem;
  letter-spacing: 0.1em;
}
.product__hero-features {
  display: flex; flex-direction: column;
  gap: 1.5rem;
}
.product__hero-features li {
  display: flex; align-items: flex-start;
  gap: 1.25rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
}
.product__hero-feat-num {
  font-family: var(--font-serif-en);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--gold-500);
  min-width: 30px;
}
.product__hero-features strong {
  display: block;
  font-family: var(--font-serif-cn);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 0.25rem;
}
.product__hero-features span {
  font-size: 0.875rem;
  color: var(--white-60);
}
.product__hero-visual {
  position: relative;
  height: 500px;
  overflow: hidden;
}
.product__hero-visual img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.product__hero-frame {
  position: absolute;
  inset: 1rem;
  border: 1px solid var(--gold-500);
  pointer-events: none;
  z-index: 2;
}

/* Product Gallery */
.product__gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 4rem 0 6rem;
}
.product__gallery-item {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--navy-700);
}
.product__gallery-item img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease);
}
.product__gallery-item:hover img {
  transform: scale(1.06);
}
.product__gallery-label {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans-en);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--gold-300);
  background: linear-gradient(to top, rgba(5,10,20,0.92), transparent);
  text-align: center;
}
@media (max-width: 768px) {
  .product__gallery { grid-template-columns: 1fr; }
}

/* Comparison */
.compare { margin-bottom: 6rem; }
.compare__title {
  font-family: var(--font-serif-cn);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 600;
  color: var(--cream);
  text-align: center;
  margin-bottom: 3rem;
}
.compare__title::after {
  content: '';
  display: block;
  width: 60px; height: 1px;
  background: var(--gold-500);
  margin: 1rem auto 0;
}
.compare__grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
}
.compare__col {
  padding: 2rem 1.25rem;
  background: var(--navy-800);
  border: 1px solid var(--white-05);
  transition: all 0.4s var(--ease);
}
.compare__col--best {
  background: linear-gradient(180deg, rgba(201,169,97,0.15), rgba(201,169,97,0.05));
  border: 1px solid var(--gold-500);
  position: relative;
  transform: scale(1.03);
  box-shadow: 0 20px 50px -20px rgba(201,169,97,0.4);
}
.compare__col-head {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}
.compare__col-head h4 {
  font-family: var(--font-serif-cn);
  font-size: 1rem;
  font-weight: 600;
  color: var(--cream);
  line-height: 1.4;
}
.compare__col--best .compare__col-head h4 {
  color: var(--gold-400);
}
.compare__col-tag {
  display: inline-block;
  margin-top: 0.5rem;
  font-family: var(--font-sans-en);
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  color: var(--navy-900);
  background: var(--gold-500);
  padding: 0.2rem 0.5rem;
}
.compare__col ul li {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--cream-dim);
  padding: 0.5rem 0;
  border-bottom: 1px dashed var(--white-05);
}
.compare__col ul li:last-child { border-bottom: none; }
.compare__col ul li.neg { color: var(--white-40); }
.compare__col ul li.neg::before { content: '— '; color: var(--white-40); }
.compare__col ul li.pos {
  color: var(--gold-300);
  font-weight: 500;
}
.compare__col ul li.pos::before { content: '✓ '; color: var(--gold-500); font-weight: 700; }

/* Specs */
.specs { margin-bottom: 6rem; }
.specs__title {
  font-family: var(--font-serif-cn);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 600;
  color: var(--cream);
  text-align: center;
  margin-bottom: 3rem;
}
.specs__title::after {
  content: '';
  display: block;
  width: 60px; height: 1px;
  background: var(--gold-500);
  margin: 1rem auto 0;
}
.specs__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.spec-card {
  position: relative;
  padding: 2rem 1.5rem;
  background: var(--navy-800);
  border: 1px solid var(--white-05);
  transition: all 0.4s var(--ease);
}
.spec-card:hover {
  border-color: var(--gold-500);
  transform: translateY(-6px);
}
.spec-card--featured {
  background: linear-gradient(180deg, rgba(201,169,97,0.12), var(--navy-800));
  border-color: var(--gold-500);
}
.spec-card__badge {
  position: absolute;
  top: -0.75rem; right: 1rem;
  background: var(--gold-500);
  color: var(--navy-900);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  padding: 0.25rem 0.75rem;
}
.spec-card__head {
  display: flex; align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}
.spec-card__power {
  font-family: var(--font-serif-en);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--gold-500);
  line-height: 1;
}
.spec-card__type {
  font-family: var(--font-serif-cn);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--cream);
}
.spec-card__model {
  font-family: var(--font-sans-en);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--white-60);
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}
.spec-card__scene {
  font-size: 0.8125rem;
  color: var(--cream-dim);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  min-height: 3em;
}
.spec-card__list {
  display: flex; flex-direction: column;
  gap: 0.75rem;
}
.spec-card__list > div {
  display: flex; justify-content: space-between;
  font-size: 0.8125rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px dashed var(--white-05);
}
.spec-card__list dt { color: var(--white-60); }
.spec-card__list dd {
  color: var(--cream);
  font-weight: 500;
  text-align: right;
}

/* Advantages */
.advantages__title {
  font-family: var(--font-serif-cn);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 600;
  color: var(--cream);
  text-align: center;
  margin-bottom: 3rem;
}
.advantages__title::after {
  content: '';
  display: block;
  width: 60px; height: 1px;
  background: var(--gold-500);
  margin: 1rem auto 0;
}
.advantages__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.advantage {
  padding: 2.5rem 2rem;
  background: linear-gradient(180deg, var(--navy-800), var(--navy-900));
  border: 1px solid var(--white-05);
  transition: all 0.4s var(--ease);
}
.advantage:hover {
  border-color: var(--gold-500);
  transform: translateY(-4px);
}
.advantage__icon {
  width: 56px; height: 56px;
  color: var(--gold-500);
  margin-bottom: 1.5rem;
}
.advantage__icon svg { width: 100%; height: 100%; }
.advantage h4 {
  font-family: var(--font-serif-cn);
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 1.25rem;
}
.advantage ul li {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--cream-dim);
  padding: 0.5rem 0 0.5rem 1.25rem;
  position: relative;
  border-bottom: 1px dashed var(--white-05);
}
.advantage ul li::before {
  content: '';
  position: absolute; left: 0; top: 1rem;
  width: 6px; height: 1px;
  background: var(--gold-500);
}
.advantage ul li:last-child { border-bottom: none; }

/* ---------- SCENARIOS ---------- */
.section--scenarios {
  background: linear-gradient(180deg, var(--navy-900), var(--navy-800));
}
.scenarios__intro {
  max-width: 800px;
  margin: 0 auto 4rem;
  text-align: center;
  font-size: 1.0625rem;
  line-height: 1.9;
  color: var(--cream-dim);
}
.scenarios__gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 220px;
  gap: 1rem;
  margin-bottom: 5rem;
}
.scene {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
}
.scene img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease);
}
.scene:hover img { transform: scale(1.08); }
.scene figcaption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 1.5rem 1.25rem 1rem;
  background: linear-gradient(180deg, transparent, rgba(5,10,20,0.9));
  transform: translateY(20px);
  opacity: 0;
  transition: all 0.4s var(--ease);
}
.scene:hover figcaption {
  transform: translateY(0);
  opacity: 1;
}
.scene figcaption span {
  font-family: var(--font-serif-cn);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--gold-400);
  letter-spacing: 0.1em;
}
.scene--lg { grid-column: span 2; grid-row: span 2; }
.scene--wide { grid-column: span 2; }

/* Layout */
.layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  padding: 4rem;
  background: var(--navy-900);
  border: 1px solid var(--line);
  position: relative;
}
.layout::before, .layout::after {
  content: '';
  position: absolute;
  width: 40px; height: 40px;
  border: 1px solid var(--gold-500);
}
.layout::before {
  top: -1px; left: -1px;
  border-right: none; border-bottom: none;
}
.layout::after {
  bottom: -1px; right: -1px;
  border-left: none; border-top: none;
}
.layout__visual {
  overflow: hidden;
  border: 1px solid var(--line);
}
.layout__visual img {
  width: 100%;
  transition: transform 0.8s var(--ease);
}
.layout__visual:hover img { transform: scale(1.05); }
.layout__text h3 {
  font-family: var(--font-serif-cn);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 600;
  color: var(--cream);
  margin: 0.75rem 0 1.25rem;
}
.layout__text p {
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--cream-dim);
  margin-bottom: 1.5rem;
}
.layout__points li {
  font-size: 0.9375rem;
  color: var(--cream);
  padding: 0.5rem 0;
  display: flex; align-items: center; gap: 0.75rem;
}
.layout__points span { color: var(--gold-500); }

/* ---------- SERVICES ---------- */
.section--services {
  background: var(--navy-900);
}
.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 6rem;
}
.service {
  position: relative;
  padding: 3rem 2rem;
  background: linear-gradient(180deg, var(--navy-800), var(--navy-900));
  border: 1px solid var(--white-05);
  text-align: center;
  transition: all 0.4s var(--ease);
  overflow: hidden;
}
.service::before {
  content: '';
  position: absolute; bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 0; height: 2px;
  background: var(--gold-500);
  transition: width 0.5s var(--ease);
}
.service:hover {
  border-color: var(--line-strong);
  transform: translateY(-6px);
}
.service:hover::before { width: 80%; }
.service__num {
  position: absolute;
  top: 1.5rem; left: 1.5rem;
  font-family: var(--font-serif-en);
  font-size: 1rem;
  font-weight: 500;
  color: var(--gold-500);
  letter-spacing: 0.2em;
}
.service__icon {
  width: 64px; height: 64px;
  color: var(--gold-500);
  margin: 0 auto 1.75rem;
}
.service__icon svg { width: 100%; height: 100%; }
.service__title {
  font-family: var(--font-serif-cn);
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 1rem;
}
.service__desc {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--cream-dim);
}

/* Mini App */
.miniapp {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 4rem;
  align-items: center;
  padding: 4rem;
  background: linear-gradient(135deg, var(--navy-800), var(--navy-900));
  border: 1px solid var(--line);
  position: relative;
}
.miniapp__text h3 {
  font-family: var(--font-serif-cn);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--cream);
  margin: 0.75rem 0 0.5rem;
}
.miniapp__lead {
  font-size: 1.0625rem;
  color: var(--gold-400);
  margin-bottom: 2rem;
}
.miniapp__steps {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
}
.miniapp__step {
  display: flex; gap: 1rem;
  padding: 1rem;
  background: var(--navy-900);
  border-left: 2px solid var(--gold-500);
}
.miniapp__step-num {
  font-family: var(--font-serif-en);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--gold-500);
  line-height: 1;
}
.miniapp__step strong {
  display: block;
  font-family: var(--font-serif-cn);
  font-size: 1rem;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 0.25rem;
}
.miniapp__step p {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--white-60);
}
.miniapp__features {
  display: flex; flex-wrap: wrap;
  gap: 0.75rem;
}
.miniapp__features span {
  font-size: 0.8125rem;
  padding: 0.4rem 1rem;
  border: 1px solid var(--line);
  color: var(--gold-400);
  letter-spacing: 0.05em;
}

.miniapp__visual {
  display: flex; justify-content: center;
}
.miniapp__phone {
  width: 240px; height: 480px;
  background: var(--navy-900);
  border: 2px solid var(--gold-700);
  border-radius: 32px;
  padding: 8px;
  position: relative;
  box-shadow: 0 30px 60px -20px rgba(0,0,0,0.6), 0 0 0 1px rgba(201,169,97,0.2);
}
.miniapp__phone-notch {
  position: absolute;
  top: 8px; left: 50%;
  transform: translateX(-50%);
  width: 80px; height: 18px;
  background: var(--navy-900);
  border-radius: 0 0 14px 14px;
  z-index: 3;
}
.miniapp__phone-screen {
  width: 100%; height: 100%;
  background: linear-gradient(180deg, #0f1f38, #050a14);
  border-radius: 24px;
  overflow: hidden;
  position: relative;
}
.miniapp__app {
  padding: 2rem 1rem 1rem;
  height: 100%;
  display: flex; flex-direction: column;
}
.miniapp__app-header {
  display: flex; align-items: center; gap: 0.5rem;
  margin-bottom: 1rem;
}
.miniapp__app-logo {
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--gold-500), var(--gold-600));
  color: var(--navy-900);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-serif-cn);
  font-size: 0.75rem;
  font-weight: 700;
}
.miniapp__app-name {
  font-family: var(--font-serif-cn);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--cream);
}
.miniapp__app-map {
  flex: 1;
  background:
    linear-gradient(135deg, rgba(201,169,97,0.1), transparent),
    repeating-linear-gradient(45deg, rgba(255,255,255,0.02) 0 10px, transparent 10px 20px);
  border: 1px solid var(--line);
  border-radius: 8px;
  position: relative;
  margin-bottom: 1rem;
}
.miniapp__app-pin {
  position: absolute;
  width: 12px; height: 12px;
  background: var(--gold-500);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(201,169,97,0.3);
  top: 30%; left: 25%;
}
.miniapp__app-pin--2 { top: 50%; left: 60%; }
.miniapp__app-pin--3 { top: 70%; left: 35%; }
.miniapp__app-card {
  background: var(--navy-800);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.75rem;
  margin-bottom: 1rem;
}
.miniapp__app-card-row {
  height: 8px;
  background: var(--white-10);
  border-radius: 4px;
  margin-bottom: 0.5rem;
}
.miniapp__app-card-row:last-child { margin-bottom: 0; width: 60%; }
.miniapp__app-btn {
  background: linear-gradient(135deg, var(--gold-500), var(--gold-600));
  color: var(--navy-900);
  text-align: center;
  padding: 0.75rem;
  border-radius: 6px;
  font-family: var(--font-serif-cn);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
}

/* ---------- PATENTS ---------- */
.section--patents {
  background: linear-gradient(180deg, var(--navy-900), var(--navy-800));
}
.patents__intro {
  max-width: 800px;
  margin: 0 auto 4rem;
  text-align: center;
  font-size: 1.0625rem;
  line-height: 1.9;
  color: var(--cream-dim);
}
.patents__grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
}
.patent {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  aspect-ratio: 3 / 4;
  cursor: pointer;
  transition: all 0.4s var(--ease);
}
.patent img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}
.patent:hover {
  border-color: var(--gold-500);
  transform: translateY(-4px);
  box-shadow: 0 15px 40px -15px rgba(201,169,97,0.4);
}
.patent:hover img { transform: scale(1.05); }
.patent::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(5,10,20,0.6));
  opacity: 0;
  transition: opacity 0.4s var(--ease);
  pointer-events: none;
}
.patent:hover::after { opacity: 1; }

/* ---------- FUTURE ---------- */
.section--future {
  background: var(--navy-900);
  position: relative;
}
.future__vision {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 5rem;
  padding: 3rem 2rem;
  position: relative;
}
.future__vision-mark {
  font-family: var(--font-serif-en);
  font-size: 0.875rem;
  letter-spacing: 0.5em;
  color: var(--gold-500);
  margin-bottom: 1.5rem;
}
.future__vision-text {
  font-family: var(--font-serif-cn);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--cream);
  line-height: 1.4;
  margin-bottom: 1.5rem;
}
.future__vision-sub {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--cream-dim);
}
.future__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 5rem;
}
.future__card {
  padding: 2.5rem 2rem;
  background: linear-gradient(180deg, var(--navy-800), var(--navy-900));
  border: 1px solid var(--white-05);
  transition: all 0.4s var(--ease);
  position: relative;
  overflow: hidden;
}
.future__card::before {
  content: '';
  position: absolute; top: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--gold-500), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s var(--ease);
}
.future__card:hover {
  border-color: var(--gold-500);
  transform: translateY(-6px);
}
.future__card:hover::before { transform: translateX(0); }
.future__card-num {
  font-family: var(--font-serif-en);
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--gold-500);
  line-height: 1;
  margin-bottom: 1rem;
}
.future__card h4 {
  font-family: var(--font-serif-cn);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 1rem;
}
.future__card p {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--cream-dim);
}

.future__partners-title,
.future__brand-title {
  font-family: var(--font-serif-cn);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 600;
  color: var(--cream);
  text-align: center;
  margin-bottom: 3rem;
}
.future__partners-title::after,
.future__brand-title::after {
  content: '';
  display: block;
  width: 60px; height: 1px;
  background: var(--gold-500);
  margin: 1rem auto 0;
}
.future__partners { margin-bottom: 5rem; }
.future__partners-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.partner {
  padding: 2rem 1.5rem;
  background: var(--navy-800);
  border: 1px solid var(--white-05);
  transition: all 0.4s var(--ease);
}
.partner:hover {
  border-color: var(--gold-500);
  transform: translateY(-4px);
}
.partner__icon {
  font-family: var(--font-serif-en);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--gold-500);
  margin-bottom: 0.75rem;
}
.partner h4 {
  font-family: var(--font-serif-cn);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 0.75rem;
}
.partner p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--cream-dim);
}

.future__brand-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.brand-step {
  padding: 2.5rem 2rem;
  background: linear-gradient(180deg, var(--navy-800), var(--navy-900));
  border: 1px solid var(--line);
  text-align: center;
  transition: all 0.4s var(--ease);
}
.brand-step:hover {
  border-color: var(--gold-500);
  transform: translateY(-4px);
}
.brand-step__num {
  display: inline-flex;
  width: 56px; height: 56px;
  align-items: center; justify-content: center;
  border: 1px solid var(--gold-500);
  border-radius: 50%;
  font-family: var(--font-serif-en);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gold-500);
  margin-bottom: 1.25rem;
}
.brand-step h4 {
  font-family: var(--font-serif-cn);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 1rem;
}
.brand-step p {
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--cream-dim);
}

/* ---------- FOOTER ---------- */
.footer { background: var(--navy-900); }
.footer__hero {
  position: relative;
  padding: 8rem 0;
  text-align: center;
  overflow: hidden;
}
.footer__hero-bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}
.footer__hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(5,10,20,0.85), rgba(5,10,20,0.95));
}
.footer__hero-content {
  position: relative; z-index: 2;
  max-width: 700px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.footer__hero-title {
  font-family: var(--font-serif-cn);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--cream);
  margin: 1rem 0;
  letter-spacing: 0.05em;
}
.footer__hero-sub {
  font-size: 1.0625rem;
  color: var(--gold-400);
  margin-bottom: 2.5rem;
  letter-spacing: 0.1em;
}

.footer__main {
  padding: 5rem 0 2rem;
  background: var(--navy-900);
  border-top: 1px solid var(--line);
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3rem;
}
.footer__brand {
  display: flex; align-items: center; gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.footer__logo {
  width: 48px; height: 40px;
  object-fit: contain;
  filter: drop-shadow(0 0 8px rgba(201,169,97,0.3));
}
.footer__brand-cn {
  display: block;
  font-family: var(--font-serif-cn);
  font-size: 1.125rem; font-weight: 600;
  color: var(--cream);
}
.footer__brand-en {
  display: block;
  font-family: var(--font-sans-en);
  font-size: 0.625rem;
  letter-spacing: 0.25em;
  color: var(--gold-500);
}
.footer__desc {
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--cream-dim);
  max-width: 320px;
}
.footer__col-title {
  font-family: var(--font-serif-cn);
  font-size: 1rem;
  font-weight: 600;
  color: var(--gold-500);
  margin-bottom: 1.25rem;
  letter-spacing: 0.1em;
}
.footer__col ul li {
  font-size: 0.875rem;
  line-height: 2;
  color: var(--cream-dim);
}
.footer__col ul li a {
  transition: color 0.3s var(--ease);
}
.footer__col ul li a:hover { color: var(--gold-500); }

.footer__bottom {
  display: flex; justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
  font-size: 0.8125rem;
  color: var(--white-60);
  flex-wrap: wrap;
  gap: 1rem;
}
.footer__bottom-tag {
  font-family: var(--font-sans-en);
  letter-spacing: 0.2em;
  color: var(--gold-500);
}

/* ---------- REVEAL ANIMATIONS ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 1024px) {
  .section { padding: 6rem 0; }
  .about__grid,
  .product__hero,
  .layout,
  .miniapp {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .about__visual { height: 500px; }
  .compare__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .compare__col--best { grid-column: span 2; transform: none; }
  .specs__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .positioning__grid,
  .market__drivers-grid,
  .market__adv-grid,
  .advantages__grid,
  .services__grid,
  .future__grid,
  .future__brand-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .rnd__grid { grid-template-columns: 1fr; gap: 2rem; }
  .future__partners-grid { grid-template-columns: repeat(2, 1fr); }
  .patents__grid { grid-template-columns: repeat(4, 1fr); }
  .scenarios__gallery {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 200px;
  }
  .scene--lg { grid-column: span 2; grid-row: span 1; }
  .scene--wide { grid-column: span 2; }
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
  .footer__hero-bg { background-attachment: scroll; }
}

@media (max-width: 768px) {
  :root { --gutter: 20px; }
  .section { padding: 5rem 0; }
  .section__head { gap: 1rem; margin-bottom: 3rem; }
  .nav__menu {
    position: fixed;
    top: 0; right: -100%;
    width: 80%; max-width: 320px;
    height: 100vh;
    background: var(--navy-800);
    flex-direction: column;
    align-items: flex-start;
    padding: 6rem 2rem 2rem;
    gap: 1.5rem;
    transition: right 0.4s var(--ease);
    border-left: 1px solid var(--line);
  }
  .nav__menu.is-open { right: 0; }
  .nav__toggle { display: flex; z-index: 1001; }
  .nav__brand-en { display: none; }

  .hero__desc br { display: none; }
  .hero__actions { flex-direction: column; align-items: center; }
  .hero__actions .btn { width: 100%; max-width: 280px; }

  .market__stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    padding: 2rem 1rem;
  }
  .compare__grid { grid-template-columns: 1fr; }
  .compare__col--best { grid-column: span 1; }
  .specs__grid { grid-template-columns: 1fr; }
  .positioning__grid,
  .market__drivers-grid,
  .market__adv-grid,
  .advantages__grid,
  .services__grid,
  .future__grid,
  .future__brand-grid,
  .future__partners-grid,
  .rnd__grid {
    grid-template-columns: 1fr;
  }
  .miniapp__steps { grid-template-columns: 1fr; }
  .patents__grid { grid-template-columns: repeat(2, 1fr); }
  .scenarios__gallery {
    grid-template-columns: 1fr;
    grid-auto-rows: 200px;
  }
  .scene--lg, .scene--wide { grid-column: span 1; }
  .layout, .miniapp { padding: 2rem 1.5rem; }
  .about__visual { height: 400px; }
  .about__badge { right: 0; padding: 1rem 1.25rem; }
  .about__badge-year { font-size: 2rem; }
  .footer__grid { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; text-align: center; }
  .rnd__partners { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .hero__title-cn { font-size: 2.5rem; }
  .hero__eyebrow { font-size: 0.75rem; gap: 0.5rem; }
  .hero__eyebrow-line { width: 30px; }
  .hero__logo { width: 100px; height: 82px; margin-bottom: 1.5rem; }
  .section__title { font-size: 1.75rem; }
  .stat__num { font-size: 2rem; }
  .preloader__logo { width: 90px; height: 75px; }
}

/* ---------- REDUCED MOTION ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .hero__bg { animation: none; }
  .reveal { opacity: 1; transform: none; }
}