:root {
  --primary:#f0b90b;
  --dark:#181a20;
  --light:#fafafa;
}
* {
  margin:0;
  padding:0;
  box-sizing:border-box;
  font-family:'Poppins',Helvetica,Arial,sans-serif;
}
body {
  background:var(--dark);
  color:#fff;
  line-height:1.6;
}
a {
  color:var(--primary);
  text-decoration:none;
}
img {
  max-width:100%;
  display:block;
}

/* Header */
header {
  background:#000;
  padding:1rem 2rem;
  display:flex;
  align-items:center;
  justify-content:space-between;
  position:sticky;
  top:0;
  z-index:1000;
}
.logo {
  display:flex;
  align-items:center;
  gap:.5rem;
  font-size:1.25rem;
  font-weight:700;
}
nav ul {
  display:flex;
  gap:1.25rem;
  list-style:none;
}
nav a {
  padding:.25rem 0;
  position:relative;
}
nav a::after {
  content:"";
  position:absolute;
  left:0;
  bottom:-4px;
  width:0;
  height:2px;
  background:var(--primary);
  transition:.3s;
}
nav a:hover::after {
  width:100%;
}

/* Section & Typography */
section {
  padding:4rem 2rem;
  max-width:1100px;
  margin:auto;
}
h1,h2,h3 {
  font-weight:700;
}
h1 {
  font-size:2rem;
  margin-bottom:1rem;
}
h2 {
  font-size:1.5rem;
  margin-bottom:.75rem;
}
p {
  margin-bottom:1rem;
  opacity:.9;
}

/* Hero */
.hero {
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:2rem;
}
.hero img {
  width:26%;
}
.hero-text {
  flex:1 1 300px;
}
.hero-actions {
  display:flex;
  gap:1rem;
  margin-top:1.5rem;
  flex-wrap:wrap;
}
.btn {
  background:var(--primary);
  color:#000;
  padding:.75rem 1.5rem;
  border-radius:.5rem;
  font-weight:600;
  transition:.3s;
}
.btn:hover {
  filter:brightness(1.1);
}
.btn.outline {
  background:#2b3139;
  color:#fff;
  border:1px solid var(--primary);
}

/* Screenshots */
.ss-section .ss-wrapper {
  position:relative;
  overflow:hidden;
  border-radius:12px;
}
.ss-section .ss-track {
  display:flex;
  transition:transform .4s ease;
}
.ss-section img {
  flex:0 0 100%;
  width:100%;
  user-select:none;
  pointer-events:none;
}
.ss-section .ss-nav {
  position:absolute;
  top:50%;
  transform:translateY(-50%);
  width:38px;
  height:52px;
  border:none;
  border-radius:8px;
  background:rgba(0,0,0,.45);
  color:#fff;
  font-size:1.6rem;
  cursor:pointer;
  z-index:3;
}
.ss-nav.prev { left:8px; }
.ss-nav.next { right:8px; }

/* Features */
.features {
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:1.5rem;
}
.feature-box {
  background:#1e2129;
  border:1px solid #2b3139;
  border-radius:.75rem;
  padding:1.5rem;
  text-align:center;
  transition:.3s;
}
.feature-box:hover {
  transform:translateY(-4px);
  border-color:var(--primary);
}

/* FAQ */
.faq-item {
  border-bottom:1px solid #2b3139;
  padding:1rem 0;
}
.faq-question {
  display:flex;
  justify-content:space-between;
  cursor:pointer;
  font-weight:600;
}
.faq-answer {
  max-height:0;
  overflow:hidden;
  transition:max-height .4s ease;
}
.faq-answer.open {
  max-height:300px;
}

/* News */
.news-list {
  display:flex;
  flex-direction:column;
  gap:1.5rem;
}
.news-item {
  background:#1e2129;
  padding:1.25rem;
  border-radius:.75rem;
  border-left:4px solid var(--primary);
}

/* Download */
.download-section {
  text-align:center;
}
.store-links {
  display:flex;
  gap:1rem;
  justify-content:center;
  margin-top:1.5rem;
  flex-wrap:wrap;
}
.store-links img {
  width:160px;
}

/* Footer */
footer {
  background:#000;
  padding:2rem;
  text-align:center;
  font-size:.875rem;
  opacity:.75;
}

/* Media Queries */
@media(max-width:600px){
  nav ul {
    flex-wrap:wrap;
    gap:.75rem;
    justify-content:center;
    margin-top:1rem;
  }
  .hero img {
    width:80%;
  }
  .ss-section .ss-track {
    display:flex;
  }
}
@media(min-width:601px){
  .ss-section .ss-wrapper {
    overflow:visible;
  }
  .ss-section .ss-track {
    display:grid;
    gap:1rem;
    grid-template-columns:repeat(auto-fill,minmax(220px,1fr));
    transform:none !important;
  }
  .ss-section .ss-nav {
    display:none;
  }
}
/* Binance App 安卓/苹果应用信息展示 */
.app-list {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
  margin-top: 2rem;
}
.app-item {
  background: #1e2129;
  padding: 2rem;
  border-radius: 1rem;
  text-align: center;
  width: 280px;
  border: 1px solid #2b3139;
  transition: transform 0.3s ease;
}
.app-item:hover {
  transform: translateY(-6px);
  border-color: var(--primary);
}
.app-item img {
  width: 64px;
  height: 64px;
  margin-bottom: 1rem;
}
.app-item h3 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
}
.app-item ul {
  list-style: none;
  padding: 0;
  margin-bottom: 1.5rem;
}
.app-item li {
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
  color: #ccc;
}
@media (max-width: 600px) {
  .app-list {
    flex-direction: column;
    align-items: center;
  }
}