*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --dvb-bg:#060608;
  --dvb-surface:#101014;
  --dvb-card:#18181f;
  --dvb-line:rgba(255,255,255,.06);
  --dvb-red:#ff2d55;
  --dvb-cyan:#00f0ea;
  --dvb-gold:#f5c518;
  --dvb-gold-dim:#c9a012;
  --dvb-text:#ececf2;
  --dvb-muted:#9494a6;
  --dvb-nav:56px;
  --dvb-fixed:0px;
  --dvb-font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--dvb-font);background:var(--dvb-bg);color:var(--dvb-text);line-height:1.85;-webkit-font-smoothing:antialiased}
body.has-fixed-dl{padding-top:var(--dvb-fixed)}
img{max-width:100%;height:auto;display:block}
a{color:var(--dvb-cyan);text-decoration:none;transition:color .2s}
a:hover{color:var(--dvb-gold)}
.dvb-wrap{width:min(1080px,90vw);margin:0 auto}

.dvb-header{position:fixed;top:0;left:0;right:0;z-index:900;height:var(--dvb-nav);background:rgba(6,6,8,.92);border-bottom:2px solid var(--dvb-gold-dim)}
.dvb-header.is-scrolled{box-shadow:0 4px 24px rgba(0,0,0,.5)}
.dvb-header-inner{display:flex;align-items:center;justify-content:space-between;height:100%;gap:12px}
.dvb-logo img{height:32px;width:auto}
.dvb-nav{display:flex;gap:20px;align-items:center}
.dvb-nav a{color:var(--dvb-muted);font-size:.86rem}
.dvb-nav a:hover,.dvb-nav a.is-on{color:var(--dvb-gold)}
.dvb-nav a.is-on{font-weight:600}

.dvb-btn-dl{display:inline-flex;align-items:center;padding:8px 18px;border-radius:4px;background:var(--dvb-gold);color:#0a0a0c;font-size:.84rem;font-weight:700;white-space:nowrap}
.dvb-btn-dl:hover{color:#0a0a0c;background:#ffd84a}

.dvb-menu-btn{display:none;background:none;border:1px solid var(--dvb-line);border-radius:4px;cursor:pointer;padding:7px 9px}
.dvb-menu-btn span{display:block;width:20px;height:2px;background:var(--dvb-gold);margin:4px 0;border-radius:1px}

.dvb-drawer{position:fixed;top:var(--dvb-nav);left:0;right:0;background:var(--dvb-surface);border-bottom:2px solid var(--dvb-gold-dim);padding:16px 5vw;display:none;flex-direction:column;gap:10px;z-index:899;transform:translateY(-110%);transition:transform .28s}
.dvb-drawer.is-open{display:flex;transform:translateY(0)}
.dvb-drawer a{color:var(--dvb-muted);font-size:.95rem;padding:5px 0;border-bottom:1px solid var(--dvb-line)}
.dvb-drawer a:last-child{border:none}

.dvb-fixed-dl{position:fixed;top:var(--dvb-nav);left:0;right:0;z-index:898;background:rgba(16,16,20,.98);border-bottom:1px solid var(--dvb-line);padding:8px 4vw;transform:translateY(-120%);opacity:0;transition:transform .3s,opacity .3s;pointer-events:none}
.dvb-fixed-dl.is-show{transform:translateY(0);opacity:1;pointer-events:auto}
.dvb-fixed-dl-inner{display:flex;justify-content:center;width:100%}
.dvb-hidden{display:none!important}

.dvb-download-zone{padding:calc(var(--dvb-nav) + 12px) 0 20px;background:linear-gradient(180deg,rgba(245,197,24,.08),transparent)}
.dvb-download-card{background:var(--dvb-card);border:1px solid var(--dvb-line);border-left:3px solid var(--dvb-gold);border-radius:0 6px 6px 0;padding:20px 18px;text-align:center}
.dvb-download-card h2{font-size:1.1rem;margin-bottom:6px;color:var(--dvb-gold)}
.dvb-download-card p{color:var(--dvb-muted);font-size:.86rem;margin-bottom:12px}
.dvb-ads-grid{display:flex;flex-wrap:wrap;justify-content:flex-start;align-items:flex-start;width:296px;max-width:100%;margin:0 auto}
.dvb-ad-item{flex:0 0 25%;width:25%;max-width:25%;display:flex;flex-direction:column;align-items:center;padding:6px 2px;box-sizing:border-box}
.dvb-ad-item img{width:65px;height:65px;object-fit:cover;border-radius:14px;box-shadow:0 4px 14px rgba(0,0,0,.4);border:1px solid var(--dvb-line);transition:transform .18s}
.dvb-ad-item a:hover img{transform:scale(1.05)}
.dvb-ad-cap{font-size:10px;color:var(--dvb-muted);text-align:center;margin-top:3px;width:100%;max-width:72px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.dvb-hero{padding:28px 0 48px;position:relative;overflow:hidden}
.dvb-hero::before{content:"";position:absolute;top:-40%;right:-20%;width:60%;height:120%;background:radial-gradient(ellipse,rgba(255,45,85,.12),transparent 70%);pointer-events:none}
.dvb-hero-grid{display:grid;grid-template-columns:1fr;gap:28px;align-items:center}
.dvb-hero-text h1{font-size:clamp(1.45rem,5vw,2.1rem);font-weight:800;line-height:1.35;margin-bottom:14px}
.dvb-hero-text h1 em{font-style:normal;color:var(--dvb-gold)}
.dvb-hero-lead{color:var(--dvb-muted);font-size:.95rem;margin-bottom:20px}
.dvb-hero-chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.dvb-chip{padding:4px 12px;font-size:.76rem;border:1px solid var(--dvb-line);border-radius:2px;color:var(--dvb-muted)}
.dvb-chip.gold{border-color:rgba(245,197,24,.5);color:var(--dvb-gold)}
.dvb-hero-btns{display:flex;flex-wrap:wrap;gap:10px}
.dvb-btn-gold{display:inline-flex;padding:12px 24px;border-radius:4px;background:var(--dvb-gold);color:#0a0a0c;font-weight:700;font-size:.92rem}
.dvb-btn-gold:hover{color:#0a0a0c;background:#ffd84a}
.dvb-btn-line{display:inline-flex;padding:12px 22px;border-radius:4px;border:1px solid var(--dvb-line);color:var(--dvb-text);font-size:.9rem}
.dvb-btn-line:hover{border-color:var(--dvb-cyan);color:var(--dvb-cyan)}
.dvb-hero-visual{position:relative;max-width:260px;margin:0 auto}
.dvb-hero-visual img{border-radius:12px;border:2px solid var(--dvb-gold-dim);box-shadow:0 20px 50px rgba(0,0,0,.55)}
.dvb-hero-badge{position:absolute;top:10px;left:10px;padding:3px 10px;background:var(--dvb-red);font-size:.7rem;font-weight:700;border-radius:2px}

.dvb-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--dvb-line);border:1px solid var(--dvb-line);margin-bottom:0}
.dvb-stat{background:var(--dvb-surface);padding:16px 10px;text-align:center}
.dvb-stat strong{display:block;font-size:1.2rem;color:var(--dvb-gold);font-weight:800}
.dvb-stat span{font-size:.74rem;color:var(--dvb-muted)}

.dvb-section{padding:48px 0}
.dvb-section-dark{background:var(--dvb-surface)}
.dvb-section-head{margin-bottom:32px}
.dvb-section-head h2{font-size:clamp(1.2rem,3.5vw,1.65rem);padding-left:14px;border-left:4px solid var(--dvb-gold);margin-bottom:8px}
.dvb-section-head p{color:var(--dvb-muted);font-size:.9rem;padding-left:18px}

.dvb-split{display:grid;grid-template-columns:3fr 7fr;gap:24px;align-items:start;margin-bottom:40px}
.dvb-split.reverse{direction:rtl}
.dvb-split.reverse>*{direction:ltr}
.dvb-split-visual img{border-radius:6px;border:1px solid var(--dvb-line);box-shadow:0 10px 30px rgba(0,0,0,.35);width:100%;object-fit:cover}
.dvb-split-body h3{font-size:1.08rem;margin-bottom:10px;color:var(--dvb-text)}
.dvb-split-body p{color:var(--dvb-muted);font-size:.9rem;margin-bottom:10px;text-align:justify}
.dvb-split-body ul{margin:10px 0 10px 18px;color:var(--dvb-muted);font-size:.88rem}
.dvb-split-body li{margin-bottom:6px}
.dvb-split-body a{color:var(--dvb-cyan)}

.dvb-prose{background:var(--dvb-card);border:1px solid var(--dvb-line);padding:24px 20px;margin-bottom:32px;border-radius:4px}
.dvb-prose h3{font-size:1.05rem;margin-bottom:12px;color:var(--dvb-gold)}
.dvb-prose p{color:var(--dvb-muted);font-size:.9rem;margin-bottom:12px;text-align:justify}
.dvb-prose p:last-child{margin-bottom:0}
.dvb-prose-grid{display:grid;grid-template-columns:1fr;gap:20px;margin-bottom:32px}
.dvb-prose h4{font-size:.95rem;margin:16px 0 8px;color:var(--dvb-text)}
.dvb-keyword-list{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.dvb-keyword-list span{padding:4px 10px;font-size:.76rem;border:1px solid var(--dvb-line);border-radius:2px;color:var(--dvb-muted)}
@media(min-width:768px){.dvb-prose-grid{grid-template-columns:1fr 1fr}}

.dvb-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:24px}
.dvb-step{background:var(--dvb-card);border:1px solid var(--dvb-line);padding:16px 12px;text-align:center;border-radius:4px}
.dvb-step-num{display:block;font-size:1.4rem;font-weight:800;color:var(--dvb-gold);margin-bottom:6px}
.dvb-step p{font-size:.82rem;color:var(--dvb-muted)}

.dvb-faq details{background:var(--dvb-card);border:1px solid var(--dvb-line);border-radius:4px;margin-bottom:10px;padding:0}
.dvb-faq summary{padding:14px 16px;cursor:pointer;font-size:.92rem;font-weight:600;list-style:none}
.dvb-faq summary::-webkit-details-marker{display:none}
.dvb-faq details[open] summary{color:var(--dvb-gold);border-bottom:1px solid var(--dvb-line)}
.dvb-faq .dvb-faq-body{padding:12px 16px 16px;color:var(--dvb-muted);font-size:.88rem}

.dvb-page{padding:calc(var(--dvb-nav) + 28px) 0 56px}
.dvb-page h1{font-size:clamp(1.3rem,4vw,1.7rem);margin-bottom:20px;padding-left:14px;border-left:4px solid var(--dvb-gold)}
.dvb-page h2{font-size:1.05rem;margin:24px 0 10px;color:var(--dvb-gold)}
.dvb-page p,.dvb-page li{color:var(--dvb-muted);font-size:.9rem;margin-bottom:10px}
.dvb-page ul,.dvb-page ol{margin:8px 0 12px 20px}

.dvb-error{text-align:center;padding:calc(var(--dvb-nav) + 40px) 0 60px}
.dvb-error h1{font-size:3rem;color:var(--dvb-gold);margin-bottom:8px}
.dvb-error p{color:var(--dvb-muted);margin-bottom:20px}

.dvb-footer{background:var(--dvb-surface);border-top:2px solid var(--dvb-gold-dim);padding:36px 0 24px;margin-top:20px}
.dvb-footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px;margin-bottom:28px}
.dvb-footer h3{font-size:.92rem;margin-bottom:12px;color:var(--dvb-gold)}
.dvb-footer p,.dvb-footer a{font-size:.82rem;color:var(--dvb-muted);display:block;margin-bottom:6px}
.dvb-footer a:hover{color:var(--dvb-cyan)}
.dvb-footer-bottom{text-align:center;padding-top:20px;border-top:1px solid var(--dvb-line);font-size:.78rem;color:var(--dvb-muted)}

@media(min-width:768px){
  .dvb-hero-grid{grid-template-columns:7fr 3fr}
  .dvb-hero-visual{margin:0}
}
@media(max-width:767px){
  .dvb-nav,.dvb-header .dvb-btn-dl{display:none}
  .dvb-menu-btn{display:block}
  .dvb-split{grid-template-columns:1fr}
  .dvb-split.reverse{direction:ltr}
  .dvb-steps{grid-template-columns:repeat(2,1fr)}
  .dvb-footer-grid{grid-template-columns:1fr}
}
@media(max-width:380px){
  .dvb-ads-grid{width:272px}
  .dvb-ad-item img{width:58px;height:58px}
}