/* ---------- CSS Variables ---------- */
:root{
    --bg: #1E50A2;
    --elev: #2a5bb8;
    --line: #3d6cc4;
    --text: #E7E6E0;
    --muted: #aeb6c2;
    --accent: #e33b3b; /* 主色可自行更换 */
    --accent-2: #f46b6b;
    --radius: 18px;
    --radius-lg: 26px;
    --shadow: 0 10px 30px rgba(0,0,0,.35);
  }
  
  /* ---------- Resets ---------- */
  *{box-sizing:border-box}
  html,body{height:100%}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,"Helvetica Neue","Noto Sans",Arial,"Apple Color Emoji","Segoe UI Emoji";
    color:var(--text);
    background:#ffffff;
    -webkit-font-smoothing:antialiased;
    -moz-osx-font-smoothing:grayscale;
    padding-top:64px;
  }
  img{max-width:100%;display:block}
  h1,h2,h3,h4,h5,h6{color:#000000}
  a{color:inherit;text-decoration:none}
  a:focus,button:focus,[tabindex]:focus{outline:2px solid var(--accent);outline-offset:2px}
  .site-nav a:focus{outline:none}
  code{padding:.15em .35em;border-radius:.35em;background:#2a5bb8;border:1px solid var(--line);color:#b7c4ff}
  
  /* ---------- Layout ---------- */
  .container{
    width:min(1100px, calc(100% - 0.5rem));
    margin-inline:auto;
  }
  .section{padding:10px 0}
  .section--tight{padding:10px 0}
  
  /* ---------- Skip link ---------- */
  .skip-link{
    position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden
  }
  .skip-link:focus{
    position:fixed;left:1rem;top:1rem;width:auto;height:auto;padding:.6rem .9rem;background:var(--elev);border-radius:.5rem;z-index:10000
  }
  
  /* ---------- Header ---------- */
  .site-header{
    position:fixed;top:0;left:0;right:0;z-index:1000;
    background:#2c2f3e;
    border-bottom:1px solid #ffffff;
  }
  .header-inner{
    display:flex;align-items:center;justify-content:space-between;min-height:64px;gap:1rem;
  }
  .brand{display:flex;align-items:center;gap:.6rem;font-weight:700;color:#ffffff}
  .brand__logo-img{height:32px;width:auto;object-fit:contain}
  .brand__text{letter-spacing:.3px}
  
  .site-nav{display:flex;align-items:center;gap:1rem}
  .site-nav__link{opacity:.88;transition:.2s opacity,.2s color;color:#ffffff}
  .site-nav__link:hover{opacity:1;color:#f46b6b}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
    border:1px solid var(--line);background:var(--elev);border-radius:999px;
    padding:.7rem 1rem;font-weight:600;transition:.2s transform,.2s background,.2s border-color;
  }
  .btn--small{padding:.5rem .8rem;font-weight:700}
  .btn--ghost{background:transparent}
  .btn--accent{
    border-color:transparent;background:linear-gradient(90deg,var(--accent),var(--accent-2));
    color:#fff;box-shadow:0 6px 18px rgba(227,59,59,.3)
  }
  .btn:hover{transform:translateY(-1px)}
  .btn:active{transform:translateY(0)}
  
  .nav-toggle{
    display:none;position:relative;width:40px;height:38px;border:1px solid var(--line);
    border-radius:10px;background:var(--elev)
  }
  .nav-toggle__bar,
  .nav-toggle__bar::before,
  .nav-toggle__bar::after{
    position:absolute;left:50%;top:50%;width:18px;height:2px;background:#dfe7f3;content:"";transform:translate(-50%,-50%)
  }
  .nav-toggle__bar::before{top:-6px;transform:translate(-50%,-50%)}
  .nav-toggle__bar::after{top:6px;transform:translate(-50%,-50%)}
  
  /* ---------- Hero ---------- */
  .hero{padding:10px 0;}
  .hero__inner{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center}
  .h1{font-size:clamp(28px,4vw,46px);line-height:1.15;margin:0 0 .5rem;color:#000000}
  .h2{font-size:clamp(18px,2.5vw,26px);line-height:1.2;margin:0 0 1rem;color:#000000}
  .h4{margin:.2rem 0 .4rem;font-size:1.05rem;color:#000000}
  .lead{font-size:1.125rem;color:var(--muted);max-width:54ch}
  .conditions-list{
    margin:1rem 0;padding-left:1.5rem;color:#333333;
  }
  .conditions-list li{
    margin-bottom:0.5rem;font-size:1.125rem;
  }
  .hero__cta{display:flex;gap:.75rem;margin:1rem 0 1.25rem}
  .meta{display:flex;gap:1rem;flex-wrap:wrap;color:var(--muted);padding:0;margin:0;list-style:none}
  
  .hero__art{position:relative;height:260px}
  .video-preview{
    position:absolute;inset:0;border-radius:var(--radius-lg);
    overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);
  }
  .video-link{
    position:relative;display:block;width:100%;height:100%;cursor:pointer;
  }
  .video-thumbnail{
    width:100%;height:100%;object-fit:cover;display:block;
  }
  .play-overlay{
    position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
    background:rgba(0,0,0,0.3);transition:all 0.3s ease;
  }
  .play-overlay:hover{
    background:rgba(0,0,0,0.5);
  }
  .play-button-icon{
    width:60px;height:60px;background:rgba(255,255,255,0.9);
    border-radius:50%;display:flex;align-items:center;justify-content:center;
    font-size:24px;color:#333;transition:all 0.3s ease;
  }
  .play-overlay:hover .play-button-icon{
    background:rgba(255,255,255,1);transform:scale(1.1);
  }

  /* 全屏按钮 */
  .fullscreen-btn{
    position:absolute;top:12px;right:12px;z-index:1001;
    width:40px;height:40px;display:flex;align-items:center;justify-content:center;
    background:rgba(0,0,0,0.7);border:none;border-radius:6px;
    color:#ffffff;cursor:pointer;transition:all 0.2s ease;
  }
  .fullscreen-btn:hover{
    background:rgba(0,0,0,0.9);transform:scale(1.05);
  }
  .fullscreen-btn svg{
    flex-shrink:0;
  }

  /* 全屏模式样式 */
  .fullscreen-mode{
    position:fixed !important;
    top:0 !important;left:0 !important;
    width:100vw !important;height:100vh !important;
    z-index:9999 !important;
    border-radius:0 !important;
  }
  .fullscreen-mode .frame__iframe{
    border-radius:0 !important;
  }
  
  /* ---------- Frame (Game) ---------- */
  .frame{
    position:relative;background:#2c2f3e;border:1px solid #2c2f3e;
    border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);
    max-width:1160px;margin:0 auto
  }
  .frame::before{
    content:"";display:block;aspect-ratio:16/9;width:100%;
  }
  .frame__iframe{
    position:absolute;inset:0;width:100%;height:100%;border:0;display:block;background:#2c2f3e
  }
  .frame__overlay{
    position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;
    gap:1rem;background:url('game-voerlay.jpg') center/cover no-repeat;
    color:#fff;border:0;cursor:pointer;font-weight:700;letter-spacing:.2px
  }
  .frame__overlay:hover{background:url('game-voerlay.jpg') center/cover no-repeat;}
  .play-button{
    background:rgba(255,255,255,0.95);
    color:#333;
    padding:12px 24px;
    border-radius:8px;
    box-shadow:0 4px 12px rgba(0,0,0,0.15);
    transition:all 0.3s ease;
    margin-top:335px;
  }
  .play-button:hover{
    background:rgba(255,255,255,1);
    transform:translateY(-2px);
    box-shadow:0 6px 16px rgba(0,0,0,0.2);
  }
  .play-button__text{
    font-size:1.1rem;
    font-weight:700;
    letter-spacing:0.5px;
  }

  /* 加载界面样式 */
  .loading-overlay{
    display:flex;
    align-items:center;
    justify-content:center;
    width:100%;
    height:100%;
  }
  .loading-content{
    text-align:center;
    color:#fff;
    margin-top:335px;
  }
  .loading-text{
    font-size:1.2rem;
    font-weight:700;
    margin-bottom:20px;
    text-shadow:0 2px 4px rgba(0,0,0,0.3);
  }
  .progress-bar{
    width:300px;
    height:8px;
    background:rgba(255,255,255,0.3);
    border-radius:4px;
    overflow:hidden;
    margin:0 auto;
  }
  .progress-fill{
    height:100%;
    background:linear-gradient(90deg, #fff, #f0f0f0);
    border-radius:4px;
    transition:width 0.1s ease;
    width:0%;
  }
  
  /* ---------- Cards / Grids ---------- */
  .grid{display:grid;gap:18px}
  .cards{grid-template-columns:repeat(4,minmax(0,1fr))}
  .card{
    background:#fbf9f5;border:1px solid #e0e0e0;border-radius:var(--radius);padding:24px;box-shadow:0 4px 20px rgba(0,0,0,.1);
    color:#333333;
  }
  
  /* ---------- 通用卡片样式 ---------- */
  .content-card{
    background:#fbf9f5;
    border:1px solid #e0e0e0;
    border-radius:var(--radius);
    padding:32px;
    margin:8px 0;
    box-shadow:0 4px 20px rgba(0,0,0,.1);
    color:#333333;
  }
  
  .content-card h1,
  .content-card h2,
  .content-card h3,
  .content-card h4,
  .content-card h5,
  .content-card h6{
    color:#000000;
  }
  
  .content-card .muted{
    color:#666666;
  }
  
  .content-card .meta{
    color:#666666;
  }
  
  .content-card .lead{
    color:#555555;
  }
  
  /* ---------- Steps样式 ---------- */
  .steps{
    padding:0;margin:0;list-style:none;color:#333333;
  }
  .steps li{
    margin-bottom:0.8rem;
  }
  .steps strong{
    color:#000000;
  }
  .rule-symbols{
    margin:0.5rem 0 0 1rem;padding-left:1rem;
  }
  .rule-symbols li{
    margin-bottom:0.3rem;font-family:monospace;font-size:0.95rem;
  }
  
  .mini-cards{grid-template-columns:repeat(3,minmax(0,1fr));margin-top:16px}
  .mini{
    background:#fbf9f5;border:1px solid #e0e0e0;border-radius:14px;padding:16px;color:#333333;box-shadow:0 2px 10px rgba(0,0,0,.05);
  }
  .mini__title{font-weight:700;margin-bottom:.25rem}
  
  /* ---------- Screenshots ---------- */
  .screenshots-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
  .screenshot{
    background:#fbf9f5;border:1px solid #e0e0e0;border-radius:var(--radius);
    overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,.1)
  }
  .screenshot img{
    width:100%;height:auto;display:block
  }
  .screenshot-placeholder{
    aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg, #f0f0f0, #e0e0e0);
    color:#666666;font-weight:600;font-size:0.9rem
  }
  
  /* ---------- FAQ ---------- */
  .faq{background:#fbf9f5;border:1px solid #e0e0e0;border-radius:var(--radius);padding:14px 16px;color:#333333;box-shadow:0 2px 10px rgba(0,0,0,.05);}
  .faq + .faq{margin-top:10px}
  .faq summary{cursor:pointer;font-weight:700;color:#000000;}
  .faq__a{color:#666666;margin-top:.5rem}
  
  /* ---------- Footer ---------- */
  .site-footer{border-top:1px solid #ffffff;padding:28px 0 40px;background:#2c2f3e}
  .footer-inner{display:grid;grid-template-columns:1fr auto auto;gap:16px;align-items:center;color:#ffffff}
  .footer-nav{display:flex;gap:16px;flex-wrap:wrap}
  .footer-nav a{color:#ffffff}
  .legal{display:flex;gap:12px}
  .legal a{color:#ffffff}
  .copy{color:#ffffff;text-align:right}
  
  /* ---------- Utilities ---------- */
  .muted{color:var(--muted)}
  .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
  
  /* ---------- Responsive ---------- */
  @media (max-width: 920px){
    .hero__inner{grid-template-columns:1fr;gap:22px}
    .cards{grid-template-columns:repeat(2,minmax(0,1fr))}
    .mini-cards{grid-template-columns:1fr}
    .screenshots-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    .footer-inner{grid-template-columns:1fr;gap:10px}
  }
  @media (max-width: 720px){
    .nav-toggle{display:inline-block}
    .site-nav{
      position:absolute;right:.8rem;top:64px;display:none;flex-direction:column;gap:.6rem;
      background:var(--elev);border:1px solid var(--line);padding:.6rem;border-radius:12px;box-shadow:var(--shadow)
    }
    .site-nav.is-open{display:flex}
  }