:root {
  --bg: #07111d;
  --bg-elev: #0d1b2c;
  --bg-card: rgba(16, 36, 58, 0.72);
  --line: rgba(140, 188, 230, 0.16);
  --text: #f3f7fb;
  --muted: #c5d3e0;
  --brand: #2f7ab8;
  --brand-2: #4aa3e0;
  --gold: #e2b84a;
  --gold-2: #f3d27a;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --radius: 18px;
  --header-h: 72px;
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--gold-2);
  text-decoration: none;
}

a:hover {
  color: #fff;
}

.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  background: var(--gold);
  color: #1a1404;
  padding: 8px 14px;
  z-index: 1000;
  border-radius: 8px;
}

.skip-link:focus {
  top: 12px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  backdrop-filter: blur(18px);
  background: rgba(7, 17, 29, 0.72);
  border-bottom: 1px solid transparent;
  transition: background 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  flex-shrink: 0;
}

.brand:hover {
  color: #fff;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  font-size: 16px;
  letter-spacing: 0.04em;
  color: #fff;
}

.brand-text small {
  color: #c8d6e3;
  font-size: 11px;
}

.nav-toggle {
  display: none;
  position: relative;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: transparent;
  border-radius: 10px;
  cursor: pointer;
  padding: 10px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: #fff;
  margin: 6px 0;
  transition: 0.25s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.nav-mask {
  display: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-nav ul {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav ul a {
  color: #f4f8fc;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  transition: 0.2s;
}

.site-nav ul a:hover,
.site-nav ul a.is-active {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, color 0.2s;
}

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

.btn:focus-visible,
.site-nav a:focus-visible,
.copy-btn:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.btn-gold,
a.btn-gold,
.site-nav a.btn-gold {
  background: linear-gradient(180deg, var(--gold-2), var(--gold));
  color: #111;
  box-shadow: 0 8px 24px rgba(226, 184, 74, 0.28);
}

.btn-gold:hover,
a.btn-gold:hover,
.site-nav a.btn-gold:hover,
.site-nav a.btn-gold:focus {
  color: #111;
}

.btn-ghost,
.btn-outline {
  color: var(--text);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.btn-lg {
  min-height: 50px;
  padding: 0 26px;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 40px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.55;
  will-change: transform, opacity;
}

.orb-1 {
  width: 420px;
  height: 420px;
  background: #1a5f96;
  top: -80px;
  left: -80px;
}

.orb-2 {
  width: 360px;
  height: 360px;
  background: #8a6a1c;
  right: 8%;
  top: 10%;
}

.orb-3 {
  width: 280px;
  height: 280px;
  background: #123a5c;
  left: 40%;
  bottom: -80px;
}

.grid-mask {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 30%, #000 20%, transparent 75%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 48px;
  align-items: center;
  position: relative;
}

.eyebrow {
  display: inline-block;
  color: var(--gold-2);
  letter-spacing: 0.06em;
  font-size: 14px;
  margin: 0 0 16px;
}

.hero h1 {
  margin: 0 0 18px;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.18;
  letter-spacing: 0.02em;
  font-weight: 700;
}

.hero h1 em {
  font-style: normal;
  background: linear-gradient(90deg, #fff, var(--gold-2) 55%, var(--brand-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  color: #e8eef5;
  font-size: 16px;
  max-width: 580px;
  margin: 0 0 28px;
}

.lead strong {
  display: block;
  color: #fff;
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: 0.02em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

.hero-note {
  color: #c5d3e0;
  font-size: 13px;
  margin: 0;
}

.hero-visual {
  position: relative;
}

.shot-frame {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow);
  transform: perspective(1200px) rotateY(-8deg) rotateX(4deg);
  animation: shot-float 6s ease-in-out infinite;
}

.shot-frame img {
  width: 100%;
}

.shot-glow {
  position: absolute;
  inset: auto -10% -30% auto;
  width: 60%;
  height: 50%;
  background: radial-gradient(circle, rgba(226, 184, 74, 0.28), transparent 70%);
  pointer-events: none;
}

.stats {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  list-style: none;
  padding: 28px 0 8px;
  margin: 36px 0 0;
}

.stats li {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px 18px 22px;
  text-align: left;
  transition: border-color 0.25s, transform 0.25s;
}

.stats li:hover {
  border-color: rgba(226, 184, 74, 0.45);
  transform: translateY(-4px);
}

.stats strong {
  display: block;
  font-size: 18px;
  color: var(--gold-2);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
  font-weight: 700;
}

.stats span {
  display: block;
  color: #d7e3ee;
  font-size: 13px;
  line-height: 1.65;
}

.section {
  padding: 88px 0;
}

.section-alt {
  background: linear-gradient(180deg, rgba(16, 36, 58, 0.45), transparent);
}

.section-head {
  max-width: 680px;
  margin-bottom: 40px;
}

.section-index {
  margin: 0 0 8px;
  color: var(--gold);
  letter-spacing: 0.28em;
  font-size: 12px;
}

.section-head h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 3.4vw, 40px);
  letter-spacing: 0.04em;
}

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

.about-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 36px;
}

.about-card,
.intro-card,
.feature-card,
.dl-card,
.contact-card,
.notice-list,
.compare,
.platform-block {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}

.intro-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.intro-kicker {
  display: block;
  margin: 0 0 12px;
  color: var(--gold-2);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.intro-kicker-gold {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  min-height: 0;
  margin-bottom: 14px;
  padding: 3px 12px;
  border-radius: 999px;
  background: var(--gold);
  color: #111;
  letter-spacing: 0.06em;
  font-size: 12px;
  line-height: 1.4;
}

.intro-card h3 {
  margin: 0 0 12px;
  color: #fff;
  font-size: 24px;
  line-height: 1.35;
}

.intro-card .lead-text {
  margin: 0 0 20px;
  color: #eef4fa;
  min-height: 4.6em;
}

.intro-card-hot {
  border-color: rgba(226, 184, 74, 0.4);
  background: #15263a;
}

.intro-points {
  list-style: none;
  margin: auto 0 0;
  padding: 0;
}

.intro-points li {
  padding: 12px 0;
  border-top: 1px solid var(--line);
  color: #eef4fa;
  font-size: 15px;
  line-height: 1.65;
}

.intro-points li:last-child {
  padding-bottom: 0;
}

.intro-points strong {
  display: inline-block;
  min-width: 5em;
  margin-right: 8px;
  color: var(--gold-2);
  font-weight: 600;
}

.check-list {
  padding-left: 18px;
  color: #fff;
  margin: 18px 0 0;
}

.check-list li {
  margin: 8px 0;
}

.shot-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.shot-gallery figure {
  margin: 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #000;
  transition: transform 0.35s;
}

.shot-gallery figure:hover {
  transform: translateY(-6px);
}

.shot-gallery figcaption {
  padding: 12px 14px 14px;
  font-size: 13px;
  color: var(--muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.feature-card {
  padding: 22px;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(226, 184, 74, 0.4);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.22);
}

.icon-wrap {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: var(--gold-2);
  background: rgba(226, 184, 74, 0.1);
  margin-bottom: 14px;
}

.icon-wrap svg {
  width: 22px;
  height: 22px;
}

.feature-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

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

.tag {
  display: inline-block;
  margin-left: 6px;
  font-size: 11px;
  color: #1d1504;
  background: var(--gold);
  border-radius: 999px;
  padding: 1px 7px;
  vertical-align: middle;
}

.platform-block {
  margin-top: 24px;
}

.platform-block h3 {
  margin: 0 0 6px;
}

.platform-block > p {
  color: var(--muted);
  margin: 0 0 16px;
}

.platform-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
}

.platform-list li {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: 13px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}

.platform-more {
  margin: 0;
  font-size: 14px;
}

.download-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 24px;
}

.dl-kicker {
  margin: 0 0 8px;
  color: var(--gold);
  font-size: 12px;
  letter-spacing: 0.18em;
}

.dl-card h3 {
  margin: 0 0 8px;
}

.dl-card p {
  color: var(--muted);
  margin: 0 0 18px;
}

.notice-list h3,
.compare h3 {
  margin-top: 0;
}

.notice-list ol {
  color: var(--muted);
  padding-left: 20px;
}

.compare {
  margin-top: 24px;
}

.compare-table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
}

th,
td {
  text-align: left;
  padding: 12px 10px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}

th {
  color: var(--gold-2);
  font-weight: 600;
}

.compare-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 12px;
}

.fine-print,
.muted {
  color: var(--muted);
  font-size: 13px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.contact-card {
  text-align: center;
}

.qr-wrap {
  width: 180px;
  height: 180px;
  margin: 8px auto 16px;
  padding: 10px;
  border-radius: 12px;
  background: #fff;
}

.qr-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.contact-value {
  font-size: 22px;
  margin: 8px 0 18px;
  letter-spacing: 0.04em;
  color: #fff;
}

.help-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin-top: 28px;
}

.help-links a {
  color: var(--text);
  border-bottom: 1px solid rgba(226, 184, 74, 0.4);
  padding-bottom: 2px;
}

.site-footer {
  padding: 36px 0 48px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.footer-inner {
  display: grid;
  gap: 12px;
}

.footer-brand {
  display: flex;
  gap: 10px;
  align-items: center;
  color: var(--text);
}

.footer-brand img {
  border-radius: 6px;
}

.footer-brand p,
.disclaimer,
.copyright {
  margin: 0;
}

.mobile-cta {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
  background: rgba(7, 17, 29, 0.92);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--line);
  z-index: 90;
}

.mobile-cta .btn {
  width: 100%;
}

.side-nav {
  position: fixed;
  top: 50%;
  right: 18px;
  z-index: 85;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 108px;
  padding: 10px 8px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(10, 22, 36, 0.88);
  backdrop-filter: blur(16px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
}

.side-nav a,
.side-top {
  display: block;
  width: 100%;
  padding: 8px 12px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: #d7e3ee;
  font-size: 13px;
  font-family: inherit;
  text-align: left;
  line-height: 1.4;
  cursor: pointer;
  transition: 0.2s;
}

.side-nav a:hover,
.side-top:hover,
.side-nav a.is-active {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.side-nav a.is-active {
  color: #111;
  background: var(--gold);
  font-weight: 600;
}

.side-top {
  margin-top: 6px;
  border-top: 1px solid var(--line);
  border-radius: 0 0 10px 10px;
  padding-top: 12px;
  color: var(--gold-2);
}

.back-top {
  display: none;
  position: fixed;
  right: 20px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(13, 27, 44, 0.9);
  color: #fff;
  cursor: pointer;
  z-index: 80;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 88px;
  transform: translateX(-50%) translateY(12px);
  background: #fff;
  color: #1a1404;
  padding: 10px 16px;
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  transition: 0.25s;
  z-index: 120;
  font-size: 14px;
}

.toast.is-show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.delay-1 { transition-delay: 0.12s; }
.reveal.delay-2 { transition-delay: 0.24s; }
.reveal.delay-3 { transition-delay: 0.36s; }
.reveal.delay-4 { transition-delay: 0.48s; }

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

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(28px); }
}

@keyframes shot-float {
  0%, 100% { transform: perspective(1200px) rotateY(-8deg) rotateX(4deg) translateY(0); }
  50% { transform: perspective(1200px) rotateY(-6deg) rotateX(2deg) translateY(-10px); }
}


@media (max-width: 1240px) {
  .side-nav {
    display: none;
  }

  .back-top {
    display: grid;
    place-items: center;
  }
}

@media (max-width: 1100px) {
  .stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  .hero-grid,
  .about-layout,
  .feature-grid,
  .shot-gallery,
  .download-grid,
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }

  .about-layout {
    grid-template-columns: 1fr;
  }

  .intro-card .lead-text {
    min-height: 0;
  }

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

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

  .shot-frame {
    transform: none;
    animation: none;
  }

  .stats {
    grid-template-columns: 1fr 1fr;
    margin-top: 28px;
  }
}

@media (max-width: 760px) {
  :root { --header-h: 64px; }

  .nav-toggle {
    display: block;
    z-index: 110;
  }

  .nav-mask {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 99;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.28s;
  }

  .nav-mask.is-open {
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav {
    position: fixed;
    inset: 0 0 auto auto;
    top: 0;
    right: 0;
    width: min(82vw, 320px);
    height: 100vh;
    background: #0b1726;
    flex-direction: column;
    align-items: stretch;
    padding: 84px 22px 24px;
    gap: 16px;
    transform: translateX(100%);
    transition: transform 0.28s ease;
    border-left: 1px solid var(--line);
    z-index: 105;
  }

  .site-nav.is-open {
    transform: none;
  }

  .site-nav ul {
    flex-direction: column;
  }

  .site-nav .btn-nav {
    width: 100%;
  }

  .about-layout,
  .shot-gallery,
  .feature-grid,
  .download-grid,
  .contact-grid,
  .stats {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 40px;
  }

  .section {
    padding: 64px 0;
  }

  .contact-value {
    font-size: 22px;
  }

  .mobile-cta {
    display: block;
  }

  .side-nav {
    display: none;
  }

  .back-top {
    display: grid;
    place-items: center;
    bottom: 86px;
  }

  .site-footer {
    padding-bottom: 120px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .orb,
  .shot-frame,
  .reveal {
    animation: none !important;
    transition: none !important;
    opacity: 1;
    transform: none;
  }
}