/* ============================================
   OKX 风格 - 响应式共享样式
   移动端(<768px) 单列 / PC端(>=768px) 双栏宽屏
   ============================================ */
:root {
  --bg: #000000;
  --bg-card: #16181a;
  --bg-elevated: #1e2024;
  --bg-input: #26282c;
  --line: #2a2c31;
  --text-main: #ffffff;
  --text-sub: #8c8e92;
  --text-dim: #5b5d63;
  --brand: #ffd500;
  --brand-dark: #e6bf00;
  --up: #2ebd85;
  --down: #f6465d;
  --blue: #3b82f6;
  --radius: 12px;
  --radius-sm: 8px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --container: 1100px;
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html { -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
}

/* 通用容器 */
.phone, .container { min-height: 100vh; background: var(--bg); }

/* ---------- 状态栏（仅移动端） ---------- */
.status-bar {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 10px 18px 6px;
  font-size: 13px;
  font-weight: 600;
}
.status-bar .icons { display: flex; align-items: center; gap: 5px; }
.status-bar svg { display: block; }
@media (max-width: 767px) {
  .status-bar { display: flex; }
}

/* ---------- 顶部导航 ---------- */
.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
}
.brand { display: flex; align-items: center; font-size: 20px; font-weight: 800; letter-spacing: 1px; }
.brand .dot { color: var(--brand); }
.top-actions { display: flex; align-items: center; gap: 14px; }
.top-actions a { color: var(--text-main); text-decoration: none; font-size: 14px; transition: color .2s; }
.top-actions a:hover { color: var(--brand); }
.top-actions .btn-reg {
  background: var(--brand);
  color: #000;
  padding: 7px 18px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  transition: background .2s;
}
.top-actions .btn-reg:hover { background: var(--brand-dark); color: #000; }
@media (min-width: 768px) {
  .top-bar { max-width: var(--container); margin: 0 auto; padding: 18px 24px; }
  .brand { font-size: 24px; }
}

/* ---------- 页面主体 ---------- */
.page-body { padding-bottom: 40px; }

/* ---------- 通用按钮 ---------- */
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  padding: 13px 24px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: opacity .2s;
}
.btn:active { opacity: .85; }
.btn-primary { background: var(--brand); color: #000; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-outline { background: transparent; color: var(--text-main); border: 1px solid var(--line); }
.btn-outline:hover { border-color: var(--brand); color: var(--brand); }
.btn-block { width: 100%; }

/* ============================================
   首页 Hero
   ============================================ */
.hero { text-align: center; padding: 20px 20px 6px; position: relative; overflow: hidden; }
.hero::before {
  content: "";
  position: absolute;
  top: -130px;
  left: 50%;
  transform: translateX(-50%);
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 213, 0, .16) 0%, transparent 70%);
  pointer-events: none;
}
.hero .badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(255, 213, 0, .45);
  color: var(--brand);
  font-size: 11px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
  background: rgba(255, 213, 0, .08);
}
.hero-title { font-size: 26px; font-weight: 800; margin-top: 16px; line-height: 1.35; }
.hero-title em { font-style: normal; color: var(--brand); }
.hero-sub { margin-top: 12px; font-size: 13px; color: var(--text-sub); line-height: 1.8; }
.hero-cta { margin-top: 24px; }
.hero-link {
  display: inline-block;
  margin-top: 14px;
  font-size: 12px;
  color: var(--text-dim);
  text-decoration: none;
}
.hero-link:hover { color: var(--brand); }
.hero-right { margin-top: 28px; display: flex; justify-content: center; }

/* 下载渠道按钮 */
.store-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 22px;
}
.store-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 12px 0;
  color: var(--text-main);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  transition: all .2s;
}
.store-btn:hover { border-color: var(--brand); color: var(--brand); }

/* 二维码 */
.qr-box { width: 168px; background: #fff; border-radius: 14px; padding: 12px; }
.qr-box .tip { color: #666; font-size: 10px; margin-top: 8px; text-align: center; }
.qr-canvas {
  width: 142px;
  height: 142px;
  display: grid;
  grid-template-columns: repeat(21, 1fr);
  grid-template-rows: repeat(21, 1fr);
  gap: 1px;
  background: #fff;
}
.qr-canvas i { background: #000; }

@media (min-width: 768px) {
  .hero {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 70px;
    align-items: center;
    text-align: left;
    padding: 60px 24px 30px;
    max-width: var(--container);
    margin: 0 auto;
  }
  .hero::before { top: -260px; width: 640px; height: 640px; left: 60%; }
  .hero .badge { font-size: 12px; }
  .hero-title { font-size: 46px; margin-top: 22px; }
  .hero-sub { font-size: 15px; line-height: 2; }
  .hero-cta { margin-top: 32px; }
  .hero-cta .btn { width: auto; display: inline-flex; padding: 15px 42px; font-size: 16px; }
  .hero-link { margin-top: 16px; font-size: 13px; }
  .store-grid { max-width: 400px; }
  .store-btn { padding: 14px 0; font-size: 14px; }
  .hero-right { margin-top: 0; }
  .qr-box { width: 200px; }
  .qr-canvas { width: 174px; height: 174px; }
  .qr-box .tip { font-size: 11px; }
}

/* ============================================
   平台数据
   ============================================ */
.dl-stats { display: flex; justify-content: center; gap: 36px; margin-top: 30px; }
.dl-stats .num { font-size: 22px; font-weight: 800; color: var(--brand); font-variant-numeric: tabular-nums; }
.dl-stats .lbl { font-size: 11px; color: var(--text-sub); margin-top: 2px; }
@media (min-width: 768px) {
  .dl-stats { gap: 90px; margin-top: 46px; }
  .dl-stats .num { font-size: 36px; }
  .dl-stats .lbl { font-size: 13px; }
}

/* ---------- 活动横幅 ---------- */
.promo-card {
  margin: 24px 20px 0;
  background: linear-gradient(120deg, #241d00 0%, #16181a 60%);
  border: 1px solid rgba(255, 213, 0, .25);
  border-radius: var(--radius);
  padding: 16px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.promo-card h4 { font-size: 14px; margin-bottom: 4px; }
.promo-card p { font-size: 11px; color: var(--text-sub); }
.promo-card .go {
  flex-shrink: 0;
  background: var(--brand);
  color: #000;
  font-size: 12px;
  font-weight: 700;
  padding: 8px 18px;
  border-radius: 999px;
  text-decoration: none;
}
.promo-card .go:hover { background: var(--brand-dark); }
@media (min-width: 768px) {
  .promo-card { max-width: var(--container); margin: 34px auto 0; padding: 20px 26px; }
  .promo-card h4 { font-size: 16px; }
  .promo-card p { font-size: 12px; }
}

/* ============================================
   特色卡片
   ============================================ */
.dl-features { margin-top: 28px; padding: 0 20px; }
.dl-features .item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 10px;
}
.dl-features .item .ico {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: rgba(255, 213, 0, .12);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  flex-shrink: 0;
}
.dl-features .item h4 { font-size: 14px; margin-bottom: 3px; }
.dl-features .item p { font-size: 12px; color: var(--text-sub); }
@media (min-width: 768px) {
  .dl-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    max-width: var(--container);
    margin: 44px auto 0;
    padding: 0 24px;
  }
  .dl-features .item { margin-bottom: 0; padding: 22px; }
  .dl-features .item p { font-size: 13px; }
}

/* ============================================
   下载页布局
   ============================================ */
.dl-layout {
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px 20px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.dl-logo { display: flex; align-items: center; gap: 10px; font-size: 30px; font-weight: 800; letter-spacing: 1px; }
.dl-slogan { margin-top: 18px; font-size: 20px; font-weight: 700; }
.dl-sub { margin-top: 8px; font-size: 13px; color: var(--text-sub); line-height: 1.7; }
.dl-layout .dl-stats { margin-top: 26px; }
.dl-buttons { width: 100%; display: flex; flex-direction: column; gap: 12px; margin-top: 26px; }
.dl-buttons .btn { width: 100%; }
.dl-layout .qr-box { margin-top: 30px; }
@media (min-width: 768px) {
  .dl-layout {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 80px;
    align-items: center;
    text-align: left;
    padding: 60px 24px 20px;
  }
  .dl-logo { font-size: 38px; }
  .dl-slogan { font-size: 30px; margin-top: 22px; }
  .dl-sub { font-size: 14px; }
  .dl-layout .dl-stats { justify-content: flex-start; gap: 40px; }
  .dl-buttons { width: 100%; max-width: 360px; }
  .dl-buttons .btn { width: 100%; }
  .dl-layout .qr-box { margin-top: 0; justify-self: end; }
}

/* ---------- 协议 / 备案 ---------- */
.legal { margin-top: 30px; font-size: 11px; color: var(--text-dim); line-height: 1.8; text-align: center; padding: 0 20px 30px; }
.legal a { color: var(--text-dim); text-decoration: underline; }

/* ============================================
   404 页面
   ============================================ */
.err-wrap {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 24px;
}
.err-code {
  font-size: 96px;
  font-weight: 800;
  letter-spacing: 4px;
  line-height: 1;
  background: linear-gradient(180deg, #fff 20%, #3a3a3a 90%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.err-code .o { color: var(--brand); -webkit-text-fill-color: var(--brand); }
.err-msg { margin-top: 18px; font-size: 18px; font-weight: 700; }
.err-desc { margin-top: 8px; font-size: 13px; color: var(--text-sub); line-height: 1.7; }
.err-art { margin: 30px 0 6px; position: relative; width: 200px; height: 130px; }
.err-art .ring {
  position: absolute;
  border-radius: 50%;
  border: 2px dashed rgba(255, 213, 0, .35);
  animation: spin 14s linear infinite;
}
.err-art .ring.r1 { width: 120px; height: 120px; left: 40px; top: 10px; }
.err-art .ring.r2 { width: 170px; height: 170px; left: 15px; top: -15px; border-color: rgba(255,255,255,.12); animation-direction: reverse; animation-duration: 22s; }
@keyframes spin { to { transform: rotate(360deg); } }
.err-btns { display: flex; flex-direction: column; gap: 12px; width: 100%; max-width: 300px; margin-top: 34px; }
@media (min-width: 768px) {
  .err-code { font-size: 160px; }
  .err-msg { font-size: 24px; }
  .err-desc { font-size: 14px; }
  .err-btns { flex-direction: row; justify-content: center; max-width: none; }
  .err-btns .btn { width: 210px; }
}

/* ---------- 底部导航（预留） ---------- */
.bottom-nav {
  position: sticky;
  bottom: 0;
  background: rgba(0, 0, 0, .92);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--line);
  display: flex;
  padding-bottom: var(--safe-bottom);
  z-index: 100;
}
.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 8px 0 7px;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 10px;
}
.nav-item.on { color: var(--brand); }