:root{--bg:#0c101c;--bg-alt:#121829;--primary:#ffe570;--primary-dark:#f5c432;--text:#e7f2ff;--text-muted:#9fb3cc;--accent:#71c0ff;--border:#243045;--radius:14px;--max-w:1180px;--shadow:0 18px 48px rgba(0,0,0,0.32);}*{box-sizing:border-box;margin:0;padding:0;}html{font-size:16px;}body{font-family:'Inter',system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:var(--bg);color:var(--text);line-height:1.65;-webkit-font-smoothing:antialiased;}a{color:var(--accent);text-decoration:none;}a:hover,a:focus{text-decoration:underline;}img{max-width:100%;display:block;border-radius:var(--radius);}header{background:rgba(12,16,28,0.92);position:sticky;top:0;z-index:1000;border-bottom:1px solid var(--border);backdrop-filter:blur(14px);}nav{max-width:var(--max-w);margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0.504rem 1.08rem;}nav .brand{display:inline-flex;align-items:center;gap:0.5rem;font-weight:800;font-size:1.2rem;color:var(--primary);white-space:nowrap;}nav ul{list-style:none;display:flex;gap:0.9rem;}nav ul li a{color:var(--text-muted);font-weight:600;font-size:0.95rem;}nav .menu-group{position:relative;display:flex;align-items:center;}nav .menu-group>button{background:none;border:1px solid var(--border);color:var(--text);padding:0.26rem 0.68rem;border-radius:999px;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:0.32rem;transition:background 0.2s;}nav .menu-group>button::after{content:'\25BE';font-size:0.75rem;line-height:1;}nav .menu-group>button:focus,nav .menu-group.open>button{background:rgba(113,192,255,0.12);outline:none;}nav .menu-group .submenu{position:absolute;top:120%;right:0;background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:0.55rem 0;min-width:230px;display:none;}nav .menu-group .submenu li{list-style:none;margin:0;}nav .menu-group .submenu a{display:block;padding:0.6rem 1rem;color:var(--text-muted);font-weight:600;}nav .menu-group .submenu a:hover{background:rgba(113,192,255,0.12);color:var(--accent);}nav .menu-group.open .submenu{display:block;}nav button{display:none;background:none;border:1px solid var(--border);color:var(--text);padding:0.35rem 0.6rem;border-radius:10px;}main{max-width:var(--max-w);margin:0 auto;padding:1.5rem;}h1{font-size:2.35rem;margin-bottom:1.2rem;color:var(--primary);}h2,h3,h4{color:var(--text);margin:2.1rem 0 0.85rem;font-weight:700;line-height:1.35;}p{margin-bottom:1.1rem;font-size:1rem;color:var(--text);}strong{color:#fff;}figure{margin:2rem 0;background:var(--bg-alt);padding:1rem;border-radius:var(--radius);border:1px solid var(--border);}figure img{width:100%;height:auto;border-radius:10px;box-shadow:var(--shadow);}figure figcaption{margin-top:0.6rem;font-size:0.92rem;color:var(--text-muted);}section{margin-bottom:2.6rem;}.iframe-top{margin-top:1.5rem;}ul,ol{margin:1rem 0 1.5rem 1.4rem;}li{margin-bottom:0.65rem;}blockquote{border-left:4px solid var(--accent);padding-left:1rem;margin:1.8rem 0;font-style:italic;color:var(--text-muted);}code{font-family:'Fira Code',monospace;background:#1a2337;border-radius:6px;padding:0.1rem 0.4rem;}table{width:100%;border-collapse:collapse;margin:1.5rem 0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);}th,td{border:1px solid var(--border);padding:0.85rem 1rem;text-align:left;}thead{background:var(--bg-alt);}tbody tr:nth-child(even){background:rgba(255,255,255,0.02);}.hero{margin-top:1.8rem;display:grid;gap:1.8rem;}.intro{background:var(--bg-alt);padding:1.75rem;border-radius:var(--radius);box-shadow:var(--shadow);}.intro p{font-size:1.05rem;color:#f4f7ff;}.iframe-shell{position:relative;width:100%;background:var(--bg-alt);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);}.iframe-shell::before{content:"";display:block;padding-top:56.25%;}.iframe-shell iframe{position:absolute;inset:0;width:100%;height:100%;border:0;border-radius:var(--radius);}.iframe-shell [data-iframe-fullscreen]{position:absolute;bottom:0.75rem;right:0.75rem;background:rgba(12,16,28,0.82);border:1px solid rgba(255,255,255,0.14);color:#f8fbff;padding:0.45rem 0.6rem;border-radius:999px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;line-height:1;font-size:0.88rem;transition:background 0.2s ease,transform 0.2s ease;box-shadow:0 8px 18px rgba(0,0,0,0.28);}.iframe-shell [data-iframe-fullscreen]:hover{background:rgba(12,16,28,0.94);transform:translateY(-1px);}.iframe-shell [data-iframe-fullscreen].is-active{background:rgba(255,229,112,0.18);color:var(--primary);}.iframe-shell [data-iframe-fullscreen]:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}.iframe-fallback{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:var(--bg);flex-direction:column;gap:0.75rem;text-align:center;padding:1.5rem;z-index:2;}.iframe-fallback button{background:var(--primary-dark);color:#1f1200;border:none;padding:0.75rem 1.5rem;font-weight:700;border-radius:999px;cursor:pointer;}.iframe-fallback button:hover{background:var(--primary);}.content-index{display:grid;gap:0.9rem;background:var(--bg-alt);padding:1.5rem;border-radius:var(--radius);border:1px solid var(--border);}.content-index a{display:inline-flex;align-items:center;gap:0.5rem;font-weight:600;}.content-index a::before{content:"→";color:var(--accent);transition:transform 0.2s;}.content-index a:hover::before{transform:translateX(4px);}.pill{display:inline-flex;align-items:center;padding:0.3rem 0.75rem;border:1px solid var(--border);border-radius:999px;font-size:0.82rem;color:var(--accent);text-transform:uppercase;letter-spacing:0.08em;margin-bottom:0.8rem;}.data-card{background:var(--bg-alt);border-radius:var(--radius);padding:1.5rem 1.75rem;border:1px solid var(--border);box-shadow:var(--shadow);margin:1.8rem 0;}.faq-list{display:grid;gap:1.2rem;}.faq-item{background:var(--bg-alt);border-radius:var(--radius);padding:1.2rem 1.4rem;border:1px solid var(--border);}.faq-item h3{margin:0 0 0.6rem;font-size:1.05rem;}.faq-item p{margin:0;color:var(--text-muted);}.responsive-table{width:100%;overflow-x:auto;border-radius:var(--radius);}.btn{display:inline-flex;align-items:center;gap:0.4rem;background:var(--accent);color:#041221;font-weight:700;padding:0.7rem 1.2rem;border-radius:10px;border:none;cursor:pointer;transition:transform 0.2s ease;}.btn:hover{transform:translateY(-1px);}.internal-nav{display:flex;flex-wrap:wrap;gap:0.75rem;margin:1.2rem 0;}.internal-nav a{background:rgba(113,192,255,0.12);padding:0.4rem 0.9rem;border-radius:999px;font-size:0.92rem;color:var(--accent);border:1px solid rgba(113,192,255,0.35);}.pro-tips{display:grid;gap:1.5rem;}.pro-tips article{background:var(--bg-alt);padding:1.35rem;border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow);}.pro-tips h3{margin-top:0;}.two-column{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.5rem;}.badge{display:inline-flex;align-items:center;gap:0.35rem;padding:0.2rem 0.75rem;border-radius:999px;background:rgba(255,229,112,0.12);color:var(--primary-dark);font-weight:600;}.flex{display:flex;flex-wrap:wrap;gap:1rem;}.fact{background:rgba(255,229,112,0.16);padding:1rem;border-radius:12px;color:#20180b;}.notice{background:rgba(255,102,102,0.15);border:1px solid rgba(255,102,102,0.4);padding:1rem;border-radius:var(--radius);color:#ffd1d1;}footer{max-width:var(--max-w);margin:3rem auto 1.5rem;border-top:1px solid var(--border);padding:2rem 1.5rem;color:var(--text-muted);font-size:0.92rem;}footer strong{color:var(--text);}footer ul{list-style:none;margin:0;padding:0;}footer li{margin-bottom:0.4rem;}footer a{color:var(--accent);}footer .footer-grid{display:grid;gap:1.8rem;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));margin-bottom:1.5rem;}footer .footer-meta{display:flex;flex-wrap:wrap;gap:0.6rem;align-items:center;color:var(--text-muted);}footer .footer-meta span{color:var(--text);}footer .mini-nav{display:flex;flex-direction:column;gap:0.3rem;}@media (max-width:960px){nav ul{gap:0.7rem;}main{padding:1.2rem;}.two-column{grid-template-columns:1fr;}}@media (max-width:768px){nav{flex-wrap:wrap;gap:1rem;}nav button{display:block;}nav ul{width:100%;flex-direction:column;gap:0.6rem;display:none;}nav ul.show{display:flex;}nav .menu-group{flex-direction:column;align-items:flex-start;width:100%;}nav .menu-group>button{width:100%;justify-content:space-between;}nav .menu-group .submenu{position:static;border:0;box-shadow:none;padding:0.4rem 0 0 0;width:100%;display:none;}nav ul.show .menu-group.open .submenu{display:flex;flex-direction:column;gap:0.4rem;}nav ul.show .menu-group .submenu a{padding:0.4rem 0;color:var(--text);font-size:1rem;}nav ul li a{font-size:1.05rem;}h1{font-size:2rem;}body{line-height:1.7;}.intro{padding:1.25rem;}.iframe-shell::before{padding-top:62%;}.footer-grid{grid-template-columns:1fr 1fr;}footer{padding:1.8rem 1.2rem;}}@media (max-width:520px){.footer-grid{grid-template-columns:1fr;}}@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:0.01ms!important;animation-iteration-count:1!important;transition-duration:0.01ms!important;scroll-behavior:auto!important;}}
.iframe-shell [data-iframe-fullscreen]{z-index:3;}