:root {
  --brand-deep: #0d2137;
  --brand-primary: #1b3a5f;
  --brand-mid: #2f5680;
  --accent: #c9a227;
  --accent-soft: #f7f1de;
  --accent-deep: #a8841a;
  --text: #122033;
  --text-secondary: #5b6b7c;
  --text-muted: #8b97a8;
  --surface: #ffffff;
  --page: #f3f5f8;
  --border: #e8edf3;
  --success: #1f9d6a;
  --danger: #dc4c4c;
  --shadow: 0 18px 48px rgba(13, 33, 55, 0.12);
  --radius: 20px;
  --font-display: "Syne", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", system-ui, sans-serif;
  --container: min(1120px, calc(100% - 40px));
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--page);
  line-height: 1.65;
  overflow-x: hidden;
}

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

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

button {
  font: inherit;
  border: 0;
  background: none;
  cursor: pointer;
}

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 480px at 85% -10%, rgba(201, 162, 39, 0.18), transparent 60%),
    radial-gradient(700px 420px at 10% 20%, rgba(47, 86, 128, 0.22), transparent 55%),
    linear-gradient(180deg, #e9eef4 0%, #f3f5f8 40%, #eef2f6 100%);
}

.container {
  width: var(--container);
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  transition: background 0.25s ease, box-shadow 0.25s ease, backdrop-filter 0.25s ease;
}

.site-header.is-scrolled {
  background: rgba(243, 245, 248, 0.86);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(13, 33, 55, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 72px;
}

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

.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: 0.02em;
  color: var(--brand-deep);
}

.brand-name i {
  font-style: normal;
  color: var(--accent);
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav a {
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav a:hover,
.nav a.is-active {
  color: var(--brand-deep);
  background: rgba(13, 33, 55, 0.05);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

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

.btn-lg {
  min-height: 52px;
  padding: 0 26px;
  font-size: 1rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-deep), var(--accent) 55%, #e8d08a);
  color: var(--brand-deep);
  box-shadow: 0 10px 28px rgba(201, 162, 39, 0.28);
}

.btn-outline {
  border: 1.5px solid rgba(13, 33, 55, 0.18);
  color: var(--brand-deep);
  background: rgba(255, 255, 255, 0.55);
}

.btn-outline:hover {
  border-color: var(--brand-deep);
}

.btn-ghost {
  color: var(--brand-deep);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  place-items: center;
  gap: 6px;
  flex-direction: column;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--brand-deep);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.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);
}

.float-rail {
  position: fixed;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 40;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.float-rail a,
.float-rail button {
  width: 58px;
  min-height: 58px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  gap: 2px;
  background: var(--brand-deep);
  color: #fff;
  box-shadow: var(--shadow);
  font-size: 0.72rem;
  transition: transform 0.2s ease, background 0.2s ease;
}

.float-rail a:hover,
.float-rail button:hover {
  transform: translateX(-3px);
  background: var(--brand-primary);
}

.float-rail svg {
  width: 18px;
  height: 18px;
}

.hero {
  position: relative;
  min-height: min(100vh, 920px);
  display: flex;
  align-items: center;
  padding: 48px 0 72px;
  overflow: hidden;
}

.hero-atmosphere {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(8px);
  animation: floatOrb 10s ease-in-out infinite;
}

.hero-orb-a {
  width: 420px;
  height: 420px;
  right: -80px;
  top: 8%;
  background: radial-gradient(circle, rgba(201, 162, 39, 0.35), transparent 68%);
}

.hero-orb-b {
  width: 320px;
  height: 320px;
  left: -60px;
  bottom: 12%;
  background: radial-gradient(circle, rgba(47, 86, 128, 0.4), transparent 68%);
  animation-delay: -3s;
}

.hero-grid {
  position: absolute;
  inset: 10% 0 0;
  background-image:
    linear-gradient(rgba(13, 33, 55, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(13, 33, 55, 0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 70% 40%, #000 20%, transparent 70%);
}

.hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(240px, 320px);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}

.hero-phone {
  justify-self: end;
  animation: phoneIn 1.1s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.phone-frame {
  width: min(300px, 100%);
  border-radius: 36px;
  padding: 10px;
  background: linear-gradient(160deg, #1a334f, #0d2137 55%, #16304a);
  box-shadow:
    0 30px 80px rgba(13, 33, 55, 0.35),
    inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.phone-shot {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 26px;
  background: #f3f5f8;
}

.hero-content {
  max-width: 620px;
  padding-block: 12px;
}

.hero-brand {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7vw, 4.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  background: linear-gradient(120deg, var(--brand-deep) 20%, var(--brand-primary) 55%, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.4vw, 2.35rem);
  line-height: 1.25;
  font-weight: 700;
  color: var(--brand-deep);
  max-width: 16ch;
}

.hero-sub {
  margin: 0 0 28px;
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 42ch;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

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

.hero-pills li {
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(13, 33, 55, 0.08);
  color: var(--brand-primary);
  font-size: 0.88rem;
  font-weight: 600;
}

.section {
  padding: 88px 0;
}

.section-head {
  max-width: 620px;
  margin-bottom: 40px;
}

.section-head h2,
.scene-copy h2,
.download-inner h2,
.contact-inner h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  line-height: 1.2;
  color: var(--brand-deep);
}

.section-head p,
.scene-copy p,
.download-inner p,
.contact-inner p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 1.02rem;
}

.eyebrow {
  margin: 0 0 8px !important;
  color: var(--accent-deep) !important;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.82rem !important;
}

.intro-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.intro-item {
  padding: 28px 24px 30px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(13, 33, 55, 0.06);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.intro-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.intro-icon {
  width: 52px;
  height: 52px;
  margin-bottom: 18px;
  color: var(--accent-deep);
}

.intro-item h3 {
  margin: 0 0 10px;
  font-size: 1.15rem;
  color: var(--brand-deep);
}

.intro-item p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.96rem;
}

.scene {
  padding-block: 0;
}

.scene-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
  align-items: center;
  padding: 48px;
  border-radius: 28px;
  background:
    linear-gradient(135deg, rgba(13, 33, 55, 0.96), rgba(27, 58, 95, 0.92)),
    var(--brand-deep);
  color: #fff;
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
}

.scene-inner::after {
  content: "";
  position: absolute;
  width: 280px;
  height: 280px;
  right: -60px;
  bottom: -80px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201, 162, 39, 0.35), transparent 70%);
}

.scene-copy,
.scene-stats {
  position: relative;
  z-index: 1;
}

.scene-copy h2 {
  color: #fff;
}

.scene-copy p {
  color: rgba(255, 255, 255, 0.72);
}

.scene-stats {
  display: grid;
  gap: 16px;
}

.scene-stats div {
  padding: 18px 20px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.scene-stats strong {
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: #f0d778;
}

.scene-stats span {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.92rem;
}

.pay-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  padding: 14px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(13, 33, 55, 0.08);
  box-shadow: 0 12px 36px rgba(13, 33, 55, 0.05);
}

.pay-chip {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 72px;
  padding: 12px 14px;
  border-radius: 16px;
  background: linear-gradient(180deg, #f8fafc, #f3f6f9);
  border: 1px solid transparent;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.pay-chip:hover {
  transform: translateY(-2px);
  border-color: rgba(201, 162, 39, 0.35);
  background: #fff;
}

.pay-ico {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  color: #fff;
}

.pay-ico svg {
  width: 22px;
  height: 22px;
}

.pay-ico.wechat { background: #1f9d6a; }
.pay-ico.alipay { background: #1677ff; }
.pay-ico.bank { background: var(--brand-primary); }
.pay-ico.usdt { background: #26a17b; }
.pay-ico.bet { background: linear-gradient(135deg, var(--accent-deep), var(--accent)); color: var(--brand-deep); }

.pay-chip strong {
  display: block;
  font-size: 0.98rem;
  color: var(--brand-deep);
  line-height: 1.2;
}

.pay-chip span:not(.pay-ico) {
  display: block;
  margin-top: 3px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

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

.value-card {
  padding: 26px 22px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, #fff, #f7f9fc);
  border: 1px solid var(--border);
  min-height: 180px;
}

.value-card h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--brand-deep);
}

.value-card p {
  margin: 0;
  color: var(--text-secondary);
}

.tabs {
  display: inline-flex;
  gap: 8px;
  padding: 6px;
  border-radius: 999px;
  background: rgba(13, 33, 55, 0.06);
  margin-bottom: 24px;
}

.tab {
  padding: 10px 18px;
  border-radius: 999px;
  color: var(--text-secondary);
  font-weight: 600;
}

.tab.is-active {
  background: var(--brand-deep);
  color: #fff;
}

.tab-panel {
  padding: 28px 30px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--border);
}

.tab-panel[hidden] {
  display: none;
}

.tab-panel ol {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--text-secondary);
}

.tab-panel li + li {
  margin-top: 12px;
}

.safety-list {
  display: grid;
  gap: 12px;
}

.safety-item {
  border-radius: 16px;
  background: #fff;
  border: 1px solid var(--border);
  overflow: hidden;
}

.safety-item summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 22px;
  font-weight: 700;
  color: var(--brand-deep);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.safety-item summary::-webkit-details-marker {
  display: none;
}

.safety-item summary::after {
  content: "+";
  font-size: 1.2rem;
  color: var(--accent-deep);
}

.safety-item[open] summary::after {
  content: "–";
}

.safety-item p {
  margin: 0;
  padding: 0 22px 20px;
  color: var(--text-secondary);
  font-size: 0.96rem;
}

.download {
  padding-top: 40px;
}

.download-inner,
.contact-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 40px 42px;
  border-radius: 28px;
}

.download-inner {
  background:
    linear-gradient(120deg, rgba(201, 162, 39, 0.16), transparent 40%),
    linear-gradient(145deg, #0d2137, #1b3a5f 55%, #2f5680);
  color: #fff;
}

.download-inner h2 {
  color: #fff;
}

.download-inner p {
  color: rgba(255, 255, 255, 0.72);
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  flex-shrink: 0;
}

.download-inner .btn-outline {
  border-color: rgba(255, 255, 255, 0.35);
  color: #fff;
  background: transparent;
}

.contact-inner {
  background: #fff;
  border: 1px solid var(--border);
}

.site-footer {
  padding: 28px 0 48px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.delay-1 { transition-delay: 0.08s; }
.delay-2 { transition-delay: 0.16s; }
.delay-3 { transition-delay: 0.24s; }
.delay-4 { transition-delay: 0.32s; }

@keyframes floatOrb {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-18px); }
}

@keyframes phoneIn {
  from {
    opacity: 0;
    transform: translateX(28px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 1024px) {
  .hero-layout {
    grid-template-columns: minmax(0, 1fr) minmax(220px, 260px);
    gap: 28px;
  }

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

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

  .scene-inner {
    grid-template-columns: 1fr;
    padding: 36px;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav {
    position: fixed;
    inset: 72px 16px auto;
    display: none;
    flex-direction: column;
    padding: 12px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
  }

  .nav.is-open {
    display: flex;
  }

  .header-actions .btn-ghost {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-top: 24px;
    align-items: flex-start;
  }

  .hero-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-phone {
    order: -1;
    justify-self: center;
    width: min(280px, 78vw);
    animation: none;
  }

  .phone-frame {
    width: 100%;
  }

  .hero-content {
    max-width: none;
    text-align: center;
  }

  .hero h1 {
    max-width: none;
    margin-inline: auto;
  }

  .hero-sub {
    margin-inline: auto;
  }

  .hero-cta,
  .hero-pills {
    justify-content: center;
  }

  .hero-brand {
    text-align: center;
  }

  .float-rail {
    right: 10px;
    gap: 8px;
  }

  .float-rail a,
  .float-rail button {
    width: 50px;
    min-height: 50px;
    border-radius: 14px;
  }

  .download-inner,
  .contact-inner,
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .download-actions {
    justify-content: center;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 64px 0;
  }

  .intro-grid,
  .value-grid {
    grid-template-columns: 1fr;
  }

  .pay-strip {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 10px;
  }

  .pay-chip {
    min-height: 64px;
  }

  .tabs {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }

  .tab {
    padding-inline: 8px;
    font-size: 0.9rem;
  }
}

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