/* USDBET androidmantiaan25-pc — standalone desktop landing page */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: #e8f2ff;
  background: #060e1f;
  background-image:
    radial-gradient(ellipse 80% 60% at 15% 10%, rgba(14, 80, 190, 0.45) 0%, transparent 55%),
    radial-gradient(ellipse 70% 50% at 85% 20%, rgba(40, 170, 230, 0.35) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 50% 100%, rgba(14, 80, 190, 0.25) 0%, transparent 55%),
    linear-gradient(165deg, #040a18 0%, #0a1630 40%, #061228 100%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
}

img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; outline: none; }

/* ── Ambient orbs ── */
.bg-orbs {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.bg-orbs span {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: orbFloat 18s ease-in-out infinite alternate;
}
.bg-orbs span:nth-child(1) {
  width: 520px; height: 520px;
  top: -120px; left: -80px;
  background: rgba(14, 80, 190, 0.35);
}
.bg-orbs span:nth-child(2) {
  width: 440px; height: 440px;
  bottom: -100px; right: -60px;
  background: rgba(40, 170, 230, 0.28);
  animation-delay: -9s;
}
@keyframes orbFloat {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, 30px) scale(1.08); }
}

/* ── Header ── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 32px;
  background: rgba(6, 14, 31, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(64, 128, 255, 0.18);
  box-shadow: 0 4px 32px rgba(0, 20, 60, 0.35);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.header-logo {
  height: 44px;
  width: auto;
  filter: drop-shadow(0 2px 8px rgba(40, 170, 230, 0.3));
}
.header-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  justify-content: center;
}
.nav-btn {
  padding: 10px 22px;
  border-radius: 999px;
  border: 1px solid rgba(64, 128, 255, 0.35);
  background: rgba(255, 255, 255, 0.06);
  color: #b8d4ff;
  font-size: 14px;
  font-weight: 600;
  transition: background 0.2s, border-color 0.2s, transform 0.15s, box-shadow 0.2s;
}
.nav-btn:hover {
  background: rgba(64, 128, 255, 0.18);
  border-color: rgba(64, 170, 255, 0.6);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(14, 80, 190, 0.25);
}
.nav-btn--ghost {
  border-color: rgba(40, 170, 230, 0.4);
  color: #7dd3fc;
}
.btn-primary {
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, #0e50be 0%, #28aae6 50%, #0e50be 100%);
  background-size: 200% auto;
  box-shadow: 0 6px 24px rgba(14, 80, 190, 0.5);
  animation: ctaSheen 3.5s linear infinite;
  transition: transform 0.15s, box-shadow 0.2s;
  white-space: nowrap;
}
.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 10px 32px rgba(14, 80, 190, 0.55);
}
@keyframes ctaSheen {
  0%   { background-position: 0% center; }
  100% { background-position: 200% center; }
}

/* ── Layout ── */
.page-wrap {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 96px 32px 0;
}

/* ── Hero ── */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  margin-top: 35px;
  align-items: center;
  margin-bottom: 80px;
  animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(14, 80, 190, 0.25);
  border: 1px solid rgba(64, 170, 255, 0.35);
  font-size: 13px;
  font-weight: 600;
  color: #7dd3fc;
  margin-bottom: 20px;
  letter-spacing: 0.04em;
}
.hero-badge::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #28aae6;
  box-shadow: 0 0 10px #28aae6;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.6; transform: scale(0.85); }
}

.hero-title {
  font-size: clamp(36px, 4vw, 52px);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #ffffff 0%, #b8d4ff 45%, #28aae6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}
.hero-sub {
  font-size: 17px;
  line-height: 1.65;
  color: rgba(184, 212, 255, 0.85);
  margin-bottom: 28px;
  max-width: 480px;
}

.feature-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
}
.chip {
  padding: 8px 16px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 700;
  color: #e0f0ff;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(64, 128, 255, 0.22);
  backdrop-filter: blur(8px);
  transition: background 0.2s, transform 0.15s;
}
.chip:hover {
  background: rgba(64, 128, 255, 0.2);
  transform: translateY(-2px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 36px;
}
.btn-route {
  min-width: 140px;
  height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(90deg, #87ccff, #3573ff);
  box-shadow: 0 4px 20px rgba(14, 80, 190, 0.4);
  transition: transform 0.15s, box-shadow 0.2s;
}
.btn-route:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(14, 80, 190, 0.5);
}
.btn-outline {
  min-width: 180px;
  height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  color: #7dd3fc;
  background: transparent;
  border: 1.5px solid rgba(64, 170, 255, 0.55);
  transition: background 0.2s, transform 0.15s;
}
.btn-outline:hover {
  background: rgba(64, 170, 255, 0.12);
  transform: translateY(-2px);
}

.hero-stats {
  display: flex;
  gap: 32px;
  padding-top: 28px;
  border-top: 1px solid rgba(64, 128, 255, 0.15);
}
.stat-num {
  display: block;
  font-size: 28px;
  font-weight: 900;
  color: #28aae6;
  line-height: 1.2;
  margin-bottom: 4px;
}
.stat-label {
  font-size: 13px;
  color: rgba(184, 212, 255, 0.6);
}

/* Phone mockup */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}
.phone-glow {
  position: absolute;
  inset: -40px;
  background: radial-gradient(circle, rgba(40, 170, 230, 0.25) 0%, transparent 70%);
  pointer-events: none;
}
.phone-frame {
  position: relative;
  width: 100%;
  max-width: 500px;
  padding: 14px;
  border-radius: 36px;
  background: linear-gradient(145deg, rgba(255,255,255,0.12), rgba(255,255,255,0.04));
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow:
    0 32px 64px rgba(0, 0, 0, 0.45),
    0 0 0 1px rgba(64, 170, 255, 0.15) inset,
    0 0 60px rgba(14, 80, 190, 0.2);
  animation: phoneFloat 5s ease-in-out infinite;
}
@keyframes phoneFloat {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}
.phone-frame::before {
  content: "";
  position: absolute;
  top: 8px; left: 50%;
  transform: translateX(-50%);
  width: 80px; height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.2);
  z-index: 2;
}
.banner-swiper {
  border-radius: 24px;
  overflow: hidden;
}
.banner-swiper img {
  width: 100%;
  height: auto;
  border-radius: 24px;
}
.banner-pagination {
  margin-top: 14px;
  text-align: center;
}
.banner-pagination .swiper-pagination-bullet {
  width: 7px; height: 7px;
  background: #4080ff;
  opacity: 0.45;
  margin: 0 4px;
}
.banner-pagination .swiper-pagination-bullet-active {
  width: 18px;
  border-radius: 4px;
  opacity: 1;
  background: linear-gradient(90deg, #0e50be, #28aae6);
}

/* ── Section common ── */
.section {
  margin-bottom: 40px;
  animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
}
.section-head {
  text-align: center;
  margin-bottom: 36px;
}
.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #28aae6;
  margin-bottom: 10px;
}
.section-title {
  font-size: 32px;
  font-weight: 900;
  background: linear-gradient(90deg, #ffffff 0%, #28aae6 50%, #ffffff 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: ctaSheen 4s linear infinite;
}

/* ── Video carousel (3 visible, prev/next if more) ── */
.video-carousel {
  position: relative;
  padding: 0 52px;
}
.video-carousel .swiper {
  overflow: hidden;
  border-radius: 16px;
}
.video-carousel .swiper-slide {
  height: auto;
}
.video-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(64, 128, 255, 0.35);
  background: rgba(6, 14, 31, 0.85);
  backdrop-filter: blur(10px);
  color: #b8d4ff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, border-color 0.2s, transform 0.15s, opacity 0.2s;
  box-shadow: 0 4px 16px rgba(0, 20, 60, 0.35);
}
.video-nav svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}
.video-nav:hover:not(.swiper-button-disabled) {
  background: rgba(14, 80, 190, 0.55);
  border-color: rgba(64, 170, 255, 0.6);
  color: #fff;
  transform: translateY(-50%) scale(1.06);
}
.video-nav--prev { left: 0; }
.video-nav--next { right: 0; }
.video-nav.swiper-button-disabled {
  opacity: 0;
  pointer-events: none;
}

.video-card {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  cursor: pointer;
  background: #000;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(64, 128, 255, 0.2);
  transition: transform 0.25s, box-shadow 0.25s;
}
.video-card:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 16px 40px rgba(14, 80, 190, 0.35);
}
.video-card img,
.video-card .video-thumb {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  pointer-events: none;
  background: #000;
}
.play-btn {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 56px; height: 56px;
  background: rgba(0, 0, 0, 0.55);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s, background 0.2s;
  pointer-events: none;
}
.play-btn::after {
  content: "";
  width: 0; height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}
.video-card:hover .play-btn {
  transform: translate(-50%, -50%) scale(1.1);
  background: rgba(14, 80, 190, 0.75);
}

/* ── Promo strip ── */
.promo-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.promo-card {
  padding: 28px 24px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(64, 128, 255, 0.18);
  backdrop-filter: blur(10px);
  text-align: center;
  transition: transform 0.2s, border-color 0.2s;
}
.promo-card:hover {
  transform: translateY(-4px);
  border-color: rgba(64, 170, 255, 0.4);
}
.promo-icon {
  font-size: 32px;
  margin-bottom: 12px;
}
.promo-card h3 {
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
}
.promo-card p {
  font-size: 14px;
  color: rgba(184, 212, 255, 0.65);
  line-height: 1.6;
}

/* ── Download tip + tutorial ── */
.tip-box {
  max-width: 720px;
  margin: 0 auto 48px;
  padding: 20px 32px;
  text-align: center;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(184, 212, 255, 0.65);
  background: rgba(255, 255, 255, 0.04);
  border-radius: 14px;
  border: 1px solid rgba(64, 128, 255, 0.15);
}
.tutorial-wrap {
  text-align: center;
}
.tutorial-wrap img {
  max-width: 680px;
  margin: 0 auto;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(64, 128, 255, 0.2);
}
.scroll-hint {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
  font-size: 15px;
  color: #7dd3fc;
  cursor: pointer;
  transition: color 0.2s;
  background: none;
  border: none;
}
.scroll-hint:hover { color: #28aae6; }
.scroll-hint svg {
  width: 16px; height: 16px;
  animation: bounce 1.5s ease-in-out infinite;
}
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(4px); }
}

/* ── Footer ── */
.site-footer {
  text-align: center;
  padding: 32px 0 16px;
  font-size: 13px;
  color: rgba(184, 212, 255, 0.4);
  letter-spacing: 0.05em;
  border-top: 1px solid rgba(64, 128, 255, 0.1);
}

/* ── Video modal ── */
.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.92);
  align-items: center;
  justify-content: center;
}
.video-modal.active { display: flex; }
.video-modal video {
  max-width: 960px;
  width: 90%;
  border-radius: 12px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6);
}
.modal-close {
  position: absolute;
  top: 24px; right: 32px;
  color: #fff;
  font-size: 48px;
  line-height: 1;
  background: none;
  border: none;
  cursor: pointer;
  opacity: 0.8;
  transition: opacity 0.2s;
}
.modal-close:hover { opacity: 1; }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .hero { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; }
  .promo-strip { grid-template-columns: 1fr; }
  .header-nav { display: none; }
  .video-carousel { padding: 0 44px; }
}
@media (max-width: 640px) {
  .page-wrap { padding: 88px 16px 48px; }
  .hero-stats { gap: 20px; }
  .video-carousel { padding: 0 40px; }
  .video-nav { width: 36px; height: 36px; }
  .video-nav svg { width: 16px; height: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .bg-orbs span, .phone-frame, .btn-primary, .hero-badge::before, .scroll-hint svg {
    animation: none !important;
  }
}