:root {
  --bg: #0b0b0f;
  --bg-2: #0f1118;
  --text: #f2f2f2;
  --muted: #b9b9c2;
  --gold: #d4af37;
  --gold-2: #b58c1f;
  --border: rgba(212, 175, 55, 0.22);
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.55);
  --radius: 16px;
  --radius-lg: 22px;
  --container: 1200px;
  --header-h: 72px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: radial-gradient(1200px 600px at 12% -10%, rgba(212, 175, 55, 0.2), transparent 60%),
    radial-gradient(800px 520px at 90% 10%, rgba(212, 175, 55, 0.12), transparent 55%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 45%, var(--bg) 100%);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.5;
}

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

button {
  font: inherit;
}

.skip {
  position: absolute;
  left: 12px;
  top: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.65);
  border: 1px solid var(--border);
  transform: translateY(-160%);
  transition: transform 180ms ease;
  z-index: 9999;
}

.skip:focus {
  transform: translateY(0);
}

.container {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  backdrop-filter: blur(10px);
  background: rgba(11, 11, 15, 0.78);
  border-bottom: 1px solid rgba(212, 175, 55, 0.16);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 160px;
}

.brand__mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: radial-gradient(circle at 25% 20%, rgba(212, 175, 55, 0.4), transparent 50%),
    linear-gradient(135deg, rgba(212, 175, 55, 0.2), rgba(181, 140, 31, 0.05));
  border: 1px solid rgba(212, 175, 55, 0.35);
  color: var(--gold);
  letter-spacing: 0.5px;
  font-weight: 700;
}

.brand__text {
  font-size: 16px;
  font-weight: 650;
  letter-spacing: 0.8px;
}

.menu {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.menu:hover {
  background: rgba(255, 255, 255, 0.06);
}

.menu__bar {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--gold), rgba(212, 175, 55, 0.45));
  margin: 2px 0;
}

.nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav__link {
  padding: 10px 12px;
  border-radius: 12px;
  color: var(--muted);
  border: 1px solid transparent;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease;
  white-space: nowrap;
}

.nav__link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(212, 175, 55, 0.18);
}

.nav__link[aria-current="true"] {
  color: var(--text);
  background: rgba(212, 175, 55, 0.1);
  border-color: rgba(212, 175, 55, 0.35);
}

.nav__cta {
  margin-left: 6px;
  padding: 10px 14px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--gold), var(--gold-2));
  color: #0b0b0f;
  font-weight: 700;
  box-shadow: 0 10px 30px rgba(212, 175, 55, 0.18);
  white-space: nowrap;
}

.nav__cta:hover {
  filter: brightness(1.06);
}

.section {
  padding: 96px 0;
}

.section--hero {
  padding-top: 84px;
}

.section--alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 70%);
  border-top: 1px solid rgba(212, 175, 55, 0.12);
  border-bottom: 1px solid rgba(212, 175, 55, 0.12);
}

#download,
#service,
#about,
#contact {
  scroll-margin-top: calc(var(--header-h) + 18px);
}

.section__head {
  max-width: 720px;
  margin-bottom: 28px;
}

.section__title {
  margin: 0 0 10px;
  font-size: 34px;
  line-height: 1.2;
  letter-spacing: 0.6px;
}

.section__desc {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
  align-items: start;
}

.hero__content {
  padding: 24px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(212, 175, 55, 0.18);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.hero__content::before {
  content: "";
  position: absolute;
  inset: -2px;
  background: radial-gradient(500px 200px at 10% 20%, rgba(212, 175, 55, 0.18), transparent 60%),
    radial-gradient(380px 240px at 80% 10%, rgba(212, 175, 55, 0.14), transparent 55%),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.04) 0 1px, transparent 1px 16px);
  opacity: 0.6;
  pointer-events: none;
}

.hero__content > * {
  position: relative;
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 13px;
  color: rgba(212, 175, 55, 0.95);
  letter-spacing: 2.4px;
  text-transform: uppercase;
}

.hero__title {
  margin: 0 0 12px;
  font-size: 52px;
  line-height: 1.05;
  letter-spacing: 1.6px;
}

.hero__lead {
  margin: 0 0 22px;
  color: var(--muted);
  max-width: 44ch;
}

.hero__points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 0 0 22px;
}

.point {
  padding: 14px 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(212, 175, 55, 0.14);
}

.point__kpi {
  font-weight: 800;
  letter-spacing: 0.8px;
  color: rgba(212, 175, 55, 0.95);
  margin-bottom: 6px;
}

.point__desc {
  font-size: 13px;
  color: rgba(242, 242, 242, 0.86);
}

.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 44px;
  padding: 0 16px;
  border-radius: 14px;
  border: 1px solid transparent;
  transition: transform 180ms ease, filter 180ms ease, background 180ms ease, border-color 180ms ease;
  user-select: none;
}

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

.btn--primary {
  background: linear-gradient(135deg, var(--gold), var(--gold-2));
  color: #0b0b0f;
  font-weight: 800;
  box-shadow: 0 12px 30px rgba(212, 175, 55, 0.18);
}

.btn--primary:hover {
  filter: brightness(1.07);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(212, 175, 55, 0.26);
  color: var(--text);
}

.btn--ghost:hover {
  background: rgba(212, 175, 55, 0.08);
  border-color: rgba(212, 175, 55, 0.4);
}

.btn--full {
  width: 100%;
}

.btn[aria-disabled='true'] {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
  filter: saturate(0.9);
}

.hero__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(185, 185, 194, 0.95);
  font-size: 13px;
}

.meta {
  opacity: 0.9;
}

.dot {
  width: 4px;
  height: 4px;
  border-radius: 999px;
  background: rgba(212, 175, 55, 0.7);
}

.hero__panel {
  position: relative;
}

.panel {
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(212, 175, 55, 0.2);
  box-shadow: var(--shadow);
  padding: 18px;
}

.panel__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
}

.panel__title {
  font-weight: 800;
  letter-spacing: 0.6px;
}

.panel__badge {
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  color: rgba(242, 242, 242, 0.9);
  border: 1px solid rgba(212, 175, 55, 0.26);
  background: rgba(212, 175, 55, 0.06);
}

.qr {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 1 / 1;
  border-radius: 18px;
  border: 1px solid rgba(212, 175, 55, 0.24);
  background: radial-gradient(circle at 20% 20%, rgba(212, 175, 55, 0.12), transparent 50%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  overflow: hidden;
  margin-bottom: 14px;
}

.qr__img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  box-sizing: border-box;
  padding: 12px;
  background: #fff;
  border-radius: 16px;
  object-fit: contain;
}

.qr__grid {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.045) 0 1px, transparent 1px 12px),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.045) 0 1px, transparent 1px 12px);
  opacity: 0.65;
}

.qr__text {
  position: relative;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(212, 175, 55, 0.28);
  background: rgba(11, 11, 15, 0.75);
  color: rgba(242, 242, 242, 0.92);
  letter-spacing: 0.6px;
}

.panel__buttons {
  display: grid;
  gap: 10px;
  margin-bottom: 10px;
}

.panel__hint {
  color: rgba(185, 185, 194, 0.92);
  font-size: 12px;
}

.grid {
  display: grid;
  gap: 14px;
}

.grid--cards {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  padding: 18px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(212, 175, 55, 0.14);
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.card:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(212, 175, 55, 0.28);
}

.card__title {
  margin: 0 0 8px;
  font-size: 18px;
  letter-spacing: 0.2px;
}

.card__text {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.steps {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.step {
  display: flex;
  gap: 14px;
  padding: 16px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(212, 175, 55, 0.12);
}

.step__num {
  min-width: 46px;
  height: 46px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  font-weight: 900;
  letter-spacing: 0.6px;
  color: rgba(212, 175, 55, 0.95);
  border: 1px solid rgba(212, 175, 55, 0.22);
  background: rgba(212, 175, 55, 0.06);
}

.step__title {
  font-weight: 800;
  margin-bottom: 4px;
}

.step__text {
  color: var(--muted);
  font-size: 13px;
}

.grid--split {
  grid-template-columns: 1.1fr 0.9fr;
}

.about__card {
  padding: 18px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(212, 175, 55, 0.14);
  background: rgba(255, 255, 255, 0.03);
}

.about__title {
  font-size: 18px;
  font-weight: 850;
  letter-spacing: 0.3px;
  margin-bottom: 8px;
}

.about__text {
  margin: 0 0 14px;
  color: var(--muted);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid rgba(212, 175, 55, 0.18);
  background: rgba(212, 175, 55, 0.06);
  color: rgba(242, 242, 242, 0.92);
  font-size: 12px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.metric {
  padding: 18px;
  border-radius: var(--radius);
  border: 1px solid rgba(212, 175, 55, 0.14);
  background: rgba(255, 255, 255, 0.02);
}

.metric__num {
  font-size: 24px;
  font-weight: 900;
  letter-spacing: 0.6px;
  color: rgba(212, 175, 55, 0.96);
  margin-bottom: 6px;
}

.metric__label {
  color: rgba(185, 185, 194, 0.95);
  font-size: 13px;
}

.grid--contact {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.contact {
  position: relative;
  padding: 18px;
  border-radius: var(--radius);
  border: 1px solid rgba(212, 175, 55, 0.14);
  background: rgba(255, 255, 255, 0.03);
}

.contact__k {
  color: rgba(212, 175, 55, 0.9);
  font-size: 13px;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.contact__v {
  font-weight: 800;
  letter-spacing: 0.3px;
  margin-bottom: 12px;
}

.copy {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 12px;
  border-radius: 12px;
  border: 1px solid rgba(212, 175, 55, 0.22);
  background: rgba(212, 175, 55, 0.08);
  color: rgba(242, 242, 242, 0.92);
  cursor: pointer;
  transition: background 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.copy:hover {
  background: rgba(212, 175, 55, 0.12);
  border-color: rgba(212, 175, 55, 0.36);
}

.copy:active {
  transform: translateY(1px);
}

.copy--link {
  text-decoration: none;
}

.notice {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  background: rgba(11, 11, 15, 0.88);
  border: 1px solid rgba(212, 175, 55, 0.26);
  padding: 10px 14px;
  border-radius: 14px;
  color: rgba(242, 242, 242, 0.95);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.55);
}

.footer {
  border-top: 1px solid rgba(212, 175, 55, 0.12);
  background: rgba(0, 0, 0, 0.18);
}

.footer__inner {
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.footer__brand {
  font-weight: 850;
  letter-spacing: 0.6px;
}

.footer__meta {
  font-size: 13px;
  color: rgba(185, 185, 194, 0.95);
  margin-top: 4px;
}

.footer__right {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: rgba(185, 185, 194, 0.95);
  font-size: 13px;
}

.footer__link {
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid transparent;
}

.footer__link:hover {
  color: rgba(242, 242, 242, 0.95);
  border-color: rgba(212, 175, 55, 0.18);
  background: rgba(255, 255, 255, 0.03);
}

.footer__sep {
  width: 1px;
  height: 14px;
  background: rgba(212, 175, 55, 0.22);
}

@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .grid--cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .steps {
    grid-template-columns: 1fr;
  }

  .grid--split {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 720px) {
  :root {
    --header-h: 66px;
  }

  .section {
    padding: 76px 0;
  }

  .section--hero {
    padding-top: 64px;
  }

  .hero__title {
    font-size: 44px;
  }

  .hero__points {
    grid-template-columns: 1fr;
  }

  .menu {
    display: inline-flex;
  }

  .nav {
    position: absolute;
    left: 0;
    right: 0;
    top: var(--header-h);
    padding: 12px 14px 16px;
    border-bottom: 1px solid rgba(212, 175, 55, 0.16);
    background: rgba(11, 11, 15, 0.92);
    backdrop-filter: blur(10px);
    display: grid;
    gap: 10px;
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 180ms ease, transform 180ms ease;
  }

  .header[data-open="true"] .nav {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav__cta {
    margin-left: 0;
    text-align: center;
  }
}

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

  * {
    transition: none !important;
  }
}