/* ============================================================
   落地屏（guide-home）：官网首页内容合并进游戏页。
   用户点 Play → begin() 走摄像头 + 模型加载，无页面跳转。
   所有选择器都限定在 #guide-home 内，不与游戏 HUD 冲突。
   ============================================================ */

#guide-home {
  background: #071F2E;             /* 实底，盖住底下还没跑起来的游戏画布 */
  display: none;
  padding: 0;                      /* 覆盖 .overlay 的 24px，由内部 .wrap 自己控制 */
  align-items: stretch;
}

#guide-home.is-on {
  display: block;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

#guide-home .wrap { max-width: 980px; margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航（在滚动容器内 sticky） ---------- */
#guide-home .topnav {
  position: sticky; top: 0; z-index: 5;
  background: rgba(7,31,46,.88);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,.14);
}
#guide-home .nav { display: flex; align-items: center; gap: 20px; height: 56px; }
#guide-home .nav .logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; letter-spacing: .5px; font-size: 16px; color: #FFFFFF;
}
#guide-home .nav .logo svg { width: 26px; height: 26px; border-radius: 7px; }
#guide-home .nav a.link { color: rgba(255,255,255,.72); text-decoration: none; font-size: 14px; }
#guide-home .nav a.link:hover { color: #FFFFFF; }
#guide-home .nav a.link.how { margin-left: auto; }
#guide-home .nav a.link.play-mini { color: #FF5A5F; font-weight: 600; margin-left: 18px; }
@media (max-width: 480px) {
  #guide-home .nav a.link.how { display: none; }
}

/* ---------- hero ---------- */
#guide-home .hero { position: relative; overflow: hidden; padding: 56px 0 64px; text-align: center; }
#guide-home .hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(60% 46% at 50% 8%, rgba(46,196,182,.10), transparent 70%),
    radial-gradient(42% 30% at 78% 62%, rgba(255,122,89,.08), transparent 70%);
}
#guide-home .waves { position: absolute; left: 0; right: 0; bottom: -2px; line-height: 0; pointer-events: none; }
#guide-home .waves svg { width: 100%; height: 90px; }
#guide-home .hero .inner { position: relative; }
#guide-home .pill {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; color: #2EC4B6;
  border: 1px solid rgba(46,196,182,.35); border-radius: 999px;
  padding: 6px 14px; margin-bottom: 20px; background: rgba(46,196,182,.08);
}
#guide-home .pill .dot { width: 7px; height: 7px; border-radius: 50%; background: #2EC4B6; box-shadow: 0 0 8px rgba(46,196,182,.8); }
#guide-home h1.brand { margin: 0 auto 16px; }
#guide-home h1.brand svg { display: block; margin: 0 auto; width: min(440px, 80vw); height: auto; }
#guide-home .tagline {
  margin: 0 auto 30px; max-width: 580px;
  color: rgba(255,255,255,.72); font-size: clamp(15px, 2.4vw, 17px);
}
#guide-home .note { margin: 16px 0 0; font-size: 13px; color: rgba(255,255,255,.5); }
#guide-home .note b { color: rgba(255,255,255,.72); font-weight: 600; }

/* Play 大按钮（与游戏内 .btn 区分开，走品牌渐变） */
#guide-home .play-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 12px;
  min-width: 220px;
  background: linear-gradient(135deg, #FF7A59, #FF4D6D);
  color: #FFFFFF;
  font-size: 18px; font-weight: 700; letter-spacing: .5px;
  text-decoration: none;
  padding: 16px 44px; border-radius: 999px;
  border: 0; cursor: pointer;
  box-shadow: 0 10px 30px rgba(255,77,109,.35);
  transition: transform .12s ease, box-shadow .2s ease;
}
#guide-home .play-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 36px rgba(255,77,109,.45); }
#guide-home .play-btn:active { transform: scale(.97); }
#guide-home .play-btn .tri {
  width: 0; height: 0;
  border-left: 14px solid #FFFFFF;
  border-top: 9px solid transparent;
  border-bottom: 9px solid transparent;
}

/* ---------- 通用 section ---------- */
#guide-home section.block { padding: 56px 0; }
#guide-home section.block.alt { background: #0B2A3D; }
#guide-home .sec-head { text-align: center; margin-bottom: 36px; }
#guide-home .sec-head h2 { margin: 0 0 8px; font-size: clamp(24px, 4vw, 30px); letter-spacing: -.4px; }
#guide-home .sec-head p { margin: 0; color: rgba(255,255,255,.72); font-size: 15px; }

/* ---------- 玩法步骤 ---------- */
#guide-home .steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(215px, 1fr)); gap: 18px; }
#guide-home .step {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 16px;
  padding: 26px 22px 22px;
  position: relative;
}
#guide-home .step .num {
  position: absolute; top: -14px; left: 20px;
  width: 30px; height: 30px; border-radius: 50%;
  background: linear-gradient(135deg, #FF7A59, #FF4D6D); color: #FFFFFF;
  font-weight: 700; font-size: 15px;
  display: flex; align-items: center; justify-content: center;
}
#guide-home .step .icon { color: #2EC4B6; margin-bottom: 12px; }
#guide-home .step .icon svg { width: 34px; height: 34px; }
#guide-home .step h3 { margin: 0 0 8px; font-size: 16px; }
#guide-home .step p { margin: 0; font-size: 13.5px; color: rgba(255,255,255,.72); }
#guide-home .step p b { color: #FFFFFF; font-weight: 600; }

/* ---------- TV 投屏推荐 ---------- */
#guide-home .tv { display: grid; grid-template-columns: 1fr; gap: 30px; align-items: center; }
@media (min-width: 780px) { #guide-home .tv { grid-template-columns: 1.05fr .95fr; } }
#guide-home .tv-copy .badge {
  display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 1px;
  color: #23303A; background: #2EC4B6; border-radius: 6px; padding: 4px 10px;
  margin-bottom: 14px;
}
#guide-home .tv-copy h2 { margin: 0 0 12px; font-size: clamp(24px, 4vw, 30px); letter-spacing: -.4px; }
#guide-home .tv-copy p { margin: 0 0 18px; color: rgba(255,255,255,.72); font-size: 15px; }
#guide-home .tv-copy ul { list-style: none; margin: 0; padding: 0; }
#guide-home .tv-copy li { display: flex; gap: 12px; padding: 9px 0; font-size: 14px; color: rgba(255,255,255,.72); }
#guide-home .tv-copy li svg { width: 20px; height: 20px; flex: 0 0 auto; margin-top: 3px; color: #2EC4B6; }
#guide-home .tv-copy li b { color: #FFFFFF; font-weight: 600; }

/* 电视机插图 */
#guide-home .tv-visual { display: flex; justify-content: center; }
#guide-home .tv-frame {
  position: relative; width: min(340px, 100%);
  border: 10px solid #102F41; border-radius: 18px;
  background: linear-gradient(180deg, #0A2C40 0%, #071F2E 100%);
  box-shadow: 0 24px 60px rgba(0,0,0,.45), inset 0 0 0 1px rgba(255,255,255,.06);
  aspect-ratio: 16 / 9.6;
  overflow: hidden;
}
#guide-home .tv-frame .lane-l, #guide-home .tv-frame .lane-r {
  position: absolute; top: 0; bottom: 0; width: 4px;
  background: repeating-linear-gradient(180deg, #2EC4B6 0 14px, transparent 14px 26px);
  opacity: .55;
}
#guide-home .tv-frame .lane-l { left: 11%; }
#guide-home .tv-frame .lane-r { right: 11%; }
#guide-home .tv-frame .swimmer { position: absolute; left: 50%; top: 38%; transform: translateX(-50%); width: 58px; height: 92px; }
#guide-home .tv-frame .swimmer-shadow { position: absolute; left: 50%; top: 38%; transform: translateX(-50%) scale(1.35); opacity: .25; }
#guide-home .tv-frame .ripples { position: absolute; left: 0; right: 0; bottom: 0; height: 34%; }
#guide-home .tv-frame .glow {
  position: absolute; inset: 0;
  background: radial-gradient(50% 42% at 50% 30%, rgba(46,196,182,.14), transparent 70%);
}
#guide-home .tv-frame .overlay-tag {
  position: absolute; left: 50%; bottom: 10px; transform: translateX(-50%);
  font-size: 11px; letter-spacing: 1px; color: rgba(255,255,255,.72);
  background: rgba(4,18,28,.7); border: 1px solid rgba(255,255,255,.14);
  padding: 4px 12px; border-radius: 999px; white-space: nowrap;
}
#guide-home .tv-stand { width: 130px; height: 10px; margin: 0 auto; background: #102F41; border-radius: 0 0 10px 10px; }
#guide-home .tv-base { width: 200px; height: 7px; margin: 0 auto; background: #0B2A3D; border-radius: 999px; }

/* ---------- 环境要求条 ---------- */
#guide-home .reqbar { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
#guide-home .req {
  display: flex; align-items: center; gap: 12px;
  background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.14);
  border-radius: 12px; padding: 14px 16px; font-size: 13px; color: rgba(255,255,255,.72);
}
#guide-home .req svg { width: 22px; height: 22px; color: #FF5A5F; flex: 0 0 auto; }
#guide-home .req b { color: #FFFFFF; font-weight: 600; display: block; font-size: 13.5px; }

/* ---------- 结尾 CTA ---------- */
#guide-home .final-cta { text-align: center; }
#guide-home .final-cta p.top { margin: 0 0 24px; color: rgba(255,255,255,.72); font-size: 16px; }

/* ---------- 页脚（含 Privacy Policy） ---------- */
#guide-home .sitefoot {
  border-top: 1px solid rgba(255,255,255,.14);
  padding: 24px 0 40px; font-size: 13px; color: rgba(255,255,255,.5);
}
#guide-home .sitefoot .foot { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
#guide-home .sitefoot a { color: rgba(255,255,255,.72); text-decoration: none; }
#guide-home .sitefoot a:hover { color: #FF5A5F; }
#guide-home .sitefoot .copy { margin-left: auto; }

/* 竖屏时游戏进行中 #guide-rotate 才出现（body.game-on），落地屏不受影响 */