*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --dyv-bg:#08080c;
  --dyv-surface:#12121a;
  --dyv-card:#1a1a26;
  --dyv-cyan:#00f2ea;
  --dyv-pink:#ff2d55;
  --dyv-magenta:#fe2c55;
  --dyv-text:#f2f2f7;
  --dyv-muted:#9a9ab0;
  --dyv-border:rgba(255,255,255,.08);
  --dyv-nav-h:56px;
  --dyv-fixed-h:0px;
  --dyv-glow:0 0 40px rgba(0,242,234,.15);
  --dyv-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(--dyv-font);background:var(--dyv-bg);color:var(--dyv-text);line-height:1.75;-webkit-font-smoothing:antialiased}
body.has-fixed-dl{padding-top:var(--dyv-fixed-h)}
img{max-width:100%;height:auto;display:block}
a{color:var(--dyv-cyan);text-decoration:none;transition:color .2s}
a:hover{color:var(--dyv-pink)}
.dyv-wrap{width:min(1120px,92vw);margin:0 auto}

/* Header */
.dyv-header{position:fixed;top:0;left:0;right:0;z-index:900;height:var(--dyv-nav-h);background:rgba(8,8,12,.72);backdrop-filter:blur(16px);border-bottom:1px solid var(--dyv-border);transition:background .3s,box-shadow .3s}
.dyv-header.is-scrolled{background:rgba(8,8,12,.95);box-shadow:0 4px 24px rgba(0,0,0,.4)}
.dyv-header-inner{display:flex;align-items:center;justify-content:space-between;height:100%;gap:12px}
.dyv-logo img{height:32px;width:auto}
.dyv-nav{display:flex;gap:20px;align-items:center}
.dyv-nav a{color:var(--dyv-muted);font-size:.9rem;white-space:nowrap}
.dyv-nav a:hover,.dyv-nav a.is-on{color:var(--dyv-text)}
.dyv-nav a.is-on{position:relative}
.dyv-nav a.is-on::after{content:"";position:absolute;bottom:-4px;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--dyv-cyan),var(--dyv-pink));border-radius:2px}
.dyv-btn-dl{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:999px;background:linear-gradient(135deg,var(--dyv-pink),var(--dyv-magenta));color:#fff;font-size:.85rem;font-weight:600;white-space:nowrap;box-shadow:0 4px 20px rgba(255,45,85,.35)}
.dyv-btn-dl:hover{color:#fff;transform:translateY(-1px);box-shadow:0 6px 28px rgba(255,45,85,.5)}
.dyv-menu-btn{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.dyv-menu-btn span{display:block;width:22px;height:2px;background:var(--dyv-text);border-radius:2px;transition:transform .3s}
.dyv-drawer{position:fixed;top:var(--dyv-nav-h);left:0;right:0;background:var(--dyv-surface);border-bottom:1px solid var(--dyv-border);padding:16px 4vw;display:none;flex-direction:column;gap:14px;z-index:899;transform:translateY(-110%);transition:transform .3s}
.dyv-drawer.is-open{display:flex;transform:translateY(0)}
.dyv-drawer a{color:var(--dyv-muted);font-size:1rem;padding:6px 0}
.dyv-drawer a:hover{color:var(--dyv-cyan)}

/* Fixed download bar */
.dyv-fixed-dl{position:fixed;top:var(--dyv-nav-h);left:0;right:0;z-index:898;background:rgba(18,18,26,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--dyv-border);padding:10px 4vw;transform:translateY(-120%);opacity:0;transition:transform .35s,opacity .35s;pointer-events:none}
.dyv-fixed-dl.is-show{transform:translateY(0);opacity:1;pointer-events:auto}
.dyv-fixed-dl-inner{display:flex;flex-wrap:wrap;justify-content:center;gap:10px 16px;max-width:328px;margin:0 auto}
.dyv-fixed-dl .dyv-ad-row{display:flex;flex-wrap:wrap;justify-content:center;gap:10px 16px;width:100%;max-width:328px}
.dyv-fixed-dl .dyv-ad-item{width:70px;flex:0 0 70px}
.dyv-hidden{display:none!important}

/* Ads */
.dyv-ad-zone{padding:20px 0 8px;background:linear-gradient(180deg,rgba(255,45,85,.06),transparent)}
.dyv-ad-zone h2{font-size:1.1rem;text-align:center;margin-bottom:4px;background:linear-gradient(90deg,var(--dyv-cyan),var(--dyv-pink));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.dyv-ad-zone p{text-align:center;color:var(--dyv-muted);font-size:.85rem;margin-bottom:12px}
#ads{display:flex;justify-content:center;align-items:flex-start;flex-wrap:wrap;gap:10px 16px;max-width:328px;margin:0 auto}
.dyv-ad-item{display:flex;flex-direction:column;align-items:center;width:70px;flex:0 0 70px}
.dyv-ad-item img{width:65px;height:65px;object-fit:cover;border-radius:16px;box-shadow:0 6px 18px rgba(0,0,0,.3);transition:transform .2s,box-shadow .2s;border:1px solid var(--dyv-border)}
.dyv-ad-item a:hover img{transform:translateY(-3px) scale(1.04);box-shadow:0 10px 24px rgba(255,45,85,.25)}
.dyv-ad-cap{font-size:11px;color:var(--dyv-muted);text-align:center;margin-top:4px;max-width:70px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* Hero - video player style */
.dyv-hero{position:relative;padding:calc(var(--dyv-nav-h) + 24px) 0 48px;overflow:hidden;min-height:88vh;display:flex;align-items:center}
.dyv-hero-bg{position:absolute;inset:0;background:radial-gradient(ellipse 80% 60% at 50% 0%,rgba(255,45,85,.12),transparent),radial-gradient(ellipse 60% 50% at 80% 80%,rgba(0,242,234,.08),transparent),var(--dyv-bg)}
.dyv-hero-scan{position:absolute;inset:0;background:repeating-linear-gradient(0deg,transparent,transparent 2px,rgba(0,0,0,.03) 2px,rgba(0,0,0,.03) 4px);pointer-events:none}
.dyv-hero-grid{position:relative;display:grid;grid-template-columns:1fr;gap:32px;align-items:center}
.dyv-hero-text h1{font-size:clamp(1.6rem,5vw,2.6rem);font-weight:800;line-height:1.25;margin-bottom:16px}
.dyv-hero-text h1 em{font-style:normal;background:linear-gradient(90deg,var(--dyv-cyan),var(--dyv-pink));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.dyv-hero-lead{color:var(--dyv-muted);font-size:1rem;margin-bottom:24px;max-width:540px}
.dyv-hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:28px}
.dyv-tag{padding:6px 14px;border-radius:999px;font-size:.78rem;border:1px solid var(--dyv-border);color:var(--dyv-muted);background:rgba(255,255,255,.03)}
.dyv-tag.hot{border-color:rgba(255,45,85,.4);color:var(--dyv-pink)}
.dyv-hero-cta{display:flex;flex-wrap:wrap;gap:12px}
.dyv-btn-primary{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:12px;background:linear-gradient(135deg,var(--dyv-pink),#e91e63);color:#fff;font-weight:700;font-size:1rem;box-shadow:0 8px 32px rgba(255,45,85,.4)}
.dyv-btn-primary:hover{color:#fff;transform:translateY(-2px)}
.dyv-btn-ghost{display:inline-flex;align-items:center;gap:8px;padding:14px 24px;border-radius:12px;border:1px solid var(--dyv-border);color:var(--dyv-text);font-size:.95rem}
.dyv-btn-ghost:hover{border-color:var(--dyv-cyan);color:var(--dyv-cyan)}
.dyv-player-mock{position:relative;max-width:320px;margin:0 auto;border-radius:24px;overflow:hidden;box-shadow:var(--dyv-glow),0 24px 64px rgba(0,0,0,.5);border:2px solid rgba(255,255,255,.06)}
.dyv-player-mock::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 60%,rgba(0,0,0,.7));z-index:1;pointer-events:none}
.dyv-player-mock img{width:100%;aspect-ratio:9/16;object-fit:cover}
.dyv-player-ui{position:absolute;bottom:0;left:0;right:0;padding:16px;z-index:2}
.dyv-progress{height:3px;background:rgba(255,255,255,.2);border-radius:3px;margin-bottom:10px;overflow:hidden}
.dyv-progress span{display:block;height:100%;width:38%;background:linear-gradient(90deg,var(--dyv-cyan),var(--dyv-pink));border-radius:3px}
.dyv-player-meta{display:flex;justify-content:space-between;font-size:.72rem;color:rgba(255,255,255,.7)}
.dyv-play-ring{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:64px;height:64px;border-radius:50%;background:rgba(255,45,85,.85);display:flex;align-items:center;justify-content:center;z-index:2;box-shadow:0 0 0 8px rgba(255,45,85,.2)}
.dyv-play-ring svg{margin-left:4px}

/* Category ribbon */
.dyv-ribbon{padding:32px 0;overflow:hidden}
.dyv-ribbon-track{display:flex;gap:10px;overflow-x:auto;padding:4px 4vw;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.dyv-ribbon-track::-webkit-scrollbar{display:none}
.dyv-ribbon-item{flex:0 0 auto;padding:10px 20px;border-radius:999px;background:var(--dyv-card);border:1px solid var(--dyv-border);color:var(--dyv-muted);font-size:.85rem;white-space:nowrap;transition:border-color .2s,color .2s}
.dyv-ribbon-item:hover,.dyv-ribbon-item.is-active{border-color:var(--dyv-pink);color:var(--dyv-pink)}

/* 3:7 content blocks */
.dyv-section{padding:56px 0}
.dyv-section-head{text-align:center;margin-bottom:40px}
.dyv-section-head h2{font-size:clamp(1.3rem,4vw,1.8rem);margin-bottom:8px}
.dyv-section-head p{color:var(--dyv-muted);font-size:.92rem;max-width:600px;margin:0 auto}
.dyv-split{display:grid;grid-template-columns:3fr 7fr;gap:32px;align-items:start;margin-bottom:48px}
.dyv-split.reverse{direction:rtl}
.dyv-split.reverse>*{direction:ltr}
.dyv-split-visual{position:relative;border-radius:16px;overflow:hidden;border:1px solid var(--dyv-border);box-shadow:0 12px 40px rgba(0,0,0,.3)}
.dyv-split-visual img{width:100%;aspect-ratio:9/16;object-fit:cover;object-position:top}
.dyv-split-visual .dyv-badge{position:absolute;top:12px;left:12px;padding:4px 10px;border-radius:6px;background:rgba(255,45,85,.9);font-size:.72rem;font-weight:600;color:#fff}
.dyv-split-body h3{font-size:1.25rem;margin-bottom:12px;color:var(--dyv-text)}
.dyv-split-body p{color:var(--dyv-muted);margin-bottom:14px;font-size:.95rem}
.dyv-split-body ul{margin:12px 0 16px 20px;color:var(--dyv-muted);font-size:.92rem}
.dyv-split-body li{margin-bottom:6px}
.dyv-split-body .dyv-link-dl{display:inline-flex;align-items:center;gap:6px;margin-top:8px;padding:10px 20px;border-radius:8px;background:rgba(255,45,85,.12);border:1px solid rgba(255,45,85,.3);color:var(--dyv-pink);font-size:.88rem;font-weight:600}
.dyv-split-body .dyv-link-dl:hover{background:rgba(255,45,85,.2);color:var(--dyv-pink)}

/* Feature grid */
.dyv-features{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.dyv-feat-card{padding:24px;border-radius:16px;background:var(--dyv-card);border:1px solid var(--dyv-border);transition:border-color .25s,transform .25s}
.dyv-feat-card:hover{border-color:rgba(0,242,234,.3);transform:translateY(-3px)}
.dyv-feat-icon{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,rgba(0,242,234,.15),rgba(255,45,85,.15));display:flex;align-items:center;justify-content:center;margin-bottom:14px;font-size:1.2rem}
.dyv-feat-card h4{font-size:1rem;margin-bottom:8px}
.dyv-feat-card p{color:var(--dyv-muted);font-size:.88rem;line-height:1.65}

/* FAQ */
.dyv-faq{max-width:760px;margin:0 auto}
.dyv-faq-item{border-bottom:1px solid var(--dyv-border);padding:20px 0}
.dyv-faq-item h3{font-size:1rem;margin-bottom:8px;color:var(--dyv-text)}
.dyv-faq-item p{color:var(--dyv-muted);font-size:.9rem}

/* Content showcase grid */
.dyv-showcase-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px}
.dyv-showcase-card{border-radius:16px;background:var(--dyv-card);border:1px solid var(--dyv-border);overflow:hidden;transition:border-color .25s,transform .25s}
.dyv-showcase-card:hover{border-color:rgba(0,242,234,.25);transform:translateY(-3px)}
.dyv-showcase-card img{width:100%;aspect-ratio:9/16;object-fit:cover;object-position:top;max-height:300px}
.dyv-showcase-card div{padding:16px 18px 20px}
.dyv-showcase-card h3{font-size:1rem;margin-bottom:8px;color:var(--dyv-text)}
.dyv-showcase-card p{color:var(--dyv-muted);font-size:.86rem;line-height:1.65}

/* Text-only SEO block */
.dyv-prose{padding:48px 0}
.dyv-prose h2{font-size:1.4rem;margin:32px 0 14px}
.dyv-prose h3{font-size:1.1rem;margin:24px 0 10px;color:var(--dyv-cyan)}
.dyv-prose p{color:var(--dyv-muted);margin-bottom:14px;font-size:.93rem}
.dyv-prose a{color:var(--dyv-cyan)}

/* Page template */
.dyv-page-hero{padding:calc(var(--dyv-nav-h) + 32px) 0 32px;text-align:center;border-bottom:1px solid var(--dyv-border)}
.dyv-page-hero h1{font-size:clamp(1.4rem,4vw,2rem);margin-bottom:8px}
.dyv-page-hero p{color:var(--dyv-muted);font-size:.9rem}
.dyv-legal{padding:40px 0 64px}
.dyv-legal h2{font-size:1.15rem;margin:28px 0 10px}
.dyv-legal p,.dyv-legal li{color:var(--dyv-muted);font-size:.9rem;margin-bottom:10px}
.dyv-legal ul{margin:8px 0 16px 24px}

/* Error pages */
.dyv-error{min-height:80vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:calc(var(--dyv-nav-h) + 40px) 4vw 40px}
.dyv-error-code{font-size:5rem;font-weight:800;background:linear-gradient(135deg,var(--dyv-cyan),var(--dyv-pink));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1}
.dyv-error h1{font-size:1.4rem;margin:16px 0 8px}
.dyv-error p{color:var(--dyv-muted);margin-bottom:24px}

/* Footer */
.dyv-footer{padding:40px 0 32px;border-top:1px solid var(--dyv-border);background:var(--dyv-surface)}
.dyv-footer-grid{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:start}
.dyv-footer-brand img{height:28px;margin-bottom:10px}
.dyv-footer-brand p{color:var(--dyv-muted);font-size:.82rem;max-width:360px}
.dyv-footer-links{display:flex;flex-wrap:wrap;gap:12px 20px}
.dyv-footer-links a{color:var(--dyv-muted);font-size:.85rem}
.dyv-footer-copy{margin-top:24px;padding-top:20px;border-top:1px solid var(--dyv-border);color:var(--dyv-muted);font-size:.78rem;text-align:center}

/* Responsive */
@media(min-width:768px){
  .dyv-hero-grid{grid-template-columns:1fr 1fr;gap:48px}
  .dyv-player-mock{margin:0 0 0 auto}
}
@media(max-width:767px){
  .dyv-nav,.dyv-btn-dl{display:none}
  .dyv-menu-btn{display:flex}
  .dyv-split{grid-template-columns:1fr;gap:20px}
  .dyv-split.reverse{direction:ltr}
  .dyv-split-visual{max-width:220px;margin:0 auto}
  .dyv-footer-grid{grid-template-columns:1fr}
  .dyv-hero{min-height:auto;padding-bottom:32px}
}