*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --dyh-bg:#000;
  --dyh-surface:#0a0a0f;
  --dyh-panel:#111118;
  --dyh-line:rgba(255,255,255,.08);
  --dyh-pink:#ff2d55;
  --dyh-cyan:#25f4ee;
  --dyh-gold:#ffc940;
  --dyh-text:#f5f5f7;
  --dyh-muted:#9a9aad;
  --dyh-nav:52px;
  --dyh-fixed:0px;
  --dyh-font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,sans-serif;
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--dyh-font);background:var(--dyh-bg);color:var(--dyh-text);line-height:1.85;-webkit-font-smoothing:antialiased}
body.has-fixed-dl{padding-top:var(--dyh-fixed)}
img{max-width:100%;height:auto;display:block}
a{color:var(--dyh-cyan);text-decoration:none;transition:color .2s,opacity .2s}
a:hover{color:var(--dyh-pink)}
.dyh-wrap{width:min(1080px,92vw);margin:0 auto}

.dyh-header{position:fixed;top:0;left:0;right:0;z-index:900;height:var(--dyh-nav);background:rgba(0,0,0,.5);backdrop-filter:blur(16px);border-bottom:1px solid transparent;transition:background .3s,border-color .3s}
.dyh-header.is-scrolled{background:rgba(0,0,0,.92);border-color:var(--dyh-line)}
.dyh-header-inner{display:flex;align-items:center;justify-content:space-between;height:100%;gap:12px}
.dyh-logo img{height:28px;width:auto}
.dyh-nav{display:flex;gap:20px;align-items:center}
.dyh-nav a{color:var(--dyh-muted);font-size:.84rem;position:relative}
.dyh-nav a:hover,.dyh-nav a.is-on{color:#fff}
.dyh-nav a.is-on::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;background:linear-gradient(90deg,var(--dyh-cyan),var(--dyh-pink));border-radius:2px}
.dyh-btn-dl{display:inline-flex;align-items:center;padding:8px 18px;border-radius:6px;background:var(--dyh-pink);color:#fff;font-size:.82rem;font-weight:700;white-space:nowrap;clip-path:polygon(8px 0,100% 0,calc(100% - 8px) 100%,0 100%);box-shadow:0 4px 20px rgba(255,45,85,.4)}
.dyh-btn-dl:hover{color:#fff;filter:brightness(1.1)}
.dyh-menu-btn{display:none;background:transparent;border:1px solid var(--dyh-line);border-radius:6px;cursor:pointer;padding:8px 10px}
.dyh-menu-btn span{display:block;width:18px;height:2px;background:var(--dyh-cyan);margin:4px 0;border-radius:1px}

.dyh-sheet{position:fixed;top:var(--dyh-nav);left:0;right:0;background:var(--dyh-surface);border-bottom:1px solid var(--dyh-line);padding:16px 4vw;display:none;flex-direction:column;gap:10px;z-index:899;transform:translateY(-110%);transition:transform .28s}
.dyh-sheet.is-open{display:flex;transform:translateY(0)}
.dyh-sheet a{color:var(--dyh-muted);font-size:.92rem;padding:8px 0;border-bottom:1px solid var(--dyh-line)}
.dyh-sheet a:last-child{border:none}

.dyh-fixed-dl{position:fixed;top:var(--dyh-nav);left:0;right:0;z-index:898;background:rgba(10,10,15,.97);backdrop-filter:blur(12px);border-bottom:1px solid var(--dyh-line);padding:8px 4vw;transform:translateY(-120%);opacity:0;transition:transform .3s,opacity .3s;pointer-events:none}
.dyh-fixed-dl.is-show{transform:translateY(0);opacity:1;pointer-events:auto}
.dyh-fixed-dl-inner{display:flex;justify-content:center;width:100%}
.dyh-hidden{display:none!important}

.dyh-dl-zone{padding:calc(var(--dyh-nav) + 12px) 0 20px;position:relative;overflow:hidden}
.dyh-dl-zone::before{content:"";position:absolute;top:0;left:-10%;right:-10%;height:120px;background:linear-gradient(135deg,rgba(37,244,238,.12),rgba(255,45,85,.15));transform:skewY(-3deg);pointer-events:none}
.dyh-dl-card{position:relative;background:var(--dyh-panel);border:1px solid var(--dyh-line);border-left:3px solid var(--dyh-pink);padding:22px 18px;text-align:center}
.dyh-dl-card h1,.dyh-dl-card h2{font-size:1.1rem;margin-bottom:8px;font-weight:800;letter-spacing:.02em}
.dyh-dl-card p{color:var(--dyh-muted);font-size:.86rem;margin-bottom:14px}
.dyh-ads-grid{display:flex;flex-wrap:wrap;justify-content:flex-start;align-items:flex-start;width:296px;max-width:100%;margin:0 auto}
.dyh-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}
.dyh-ad-item img{width:65px;height:65px;object-fit:cover;border-radius:16px;box-shadow:0 6px 18px rgba(0,0,0,.35);transition:transform .18s;border:1px solid var(--dyh-line)}
.dyh-ad-item a:hover img{transform:translateY(-3px) scale(1.04);border-color:var(--dyh-cyan)}
.dyh-ad-cap{font-size:10px;color:var(--dyh-muted);text-align:center;margin-top:4px;width:100%;max-width:72px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.dyh-hero{padding:36px 0 48px;position:relative}
.dyh-hero::after{content:"";position:absolute;bottom:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--dyh-pink),var(--dyh-cyan),transparent)}
.dyh-split{display:grid;grid-template-columns:3fr 7fr;gap:28px;align-items:center}
.dyh-split--rev{grid-template-columns:7fr 3fr}
.dyh-split--rev .dyh-split-img{order:2}
.dyh-split--rev .dyh-split-text{order:1}
.dyh-split-img{position:relative}
.dyh-phone-frame{position:relative;border-radius:22px;overflow:hidden;border:2px solid var(--dyh-line);box-shadow:0 0 0 1px rgba(37,244,238,.15),0 20px 50px rgba(0,0,0,.6)}
.dyh-phone-frame::before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;border:1px solid rgba(255,45,85,.25);border-radius:20px;pointer-events:none;z-index:1}
.dyh-phone-frame img{width:100%;border-radius:20px}
.dyh-split-text h2{font-size:1.45rem;font-weight:800;line-height:1.35;margin-bottom:12px}
.dyh-split-text h2 em{font-style:normal;background:linear-gradient(90deg,var(--dyh-cyan),var(--dyh-pink));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.dyh-split-text p{color:var(--dyh-muted);font-size:.92rem;margin-bottom:10px}
.dyh-tag-row{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}
.dyh-tag{display:inline-block;padding:4px 12px;font-size:.75rem;border:1px solid var(--dyh-line);border-radius:4px;color:var(--dyh-cyan);background:rgba(37,244,238,.06)}
.dyh-hero-lead{font-size:1.6rem;font-weight:900;line-height:1.3;margin-bottom:14px;letter-spacing:-.01em}
.dyh-hero-lead span{color:var(--dyh-pink)}
.dyh-hero-sub{color:var(--dyh-muted);font-size:.95rem;max-width:560px;margin-bottom:20px}
.dyh-cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}
.dyh-cta-outline{display:inline-flex;padding:10px 20px;border:1px solid var(--dyh-cyan);color:var(--dyh-cyan);font-size:.86rem;font-weight:600;border-radius:6px}
.dyh-cta-outline:hover{background:rgba(37,244,238,.08);color:var(--dyh-cyan)}

.dyh-section{padding:52px 0;position:relative}
.dyh-section--alt{background:var(--dyh-surface)}
.dyh-section-head{margin-bottom:32px;text-align:center}
.dyh-section-head h2{font-size:1.35rem;font-weight:800;margin-bottom:8px}
.dyh-section-head p{color:var(--dyh-muted);font-size:.88rem}
.dyh-section-head .dyh-line-deco{display:inline-block;width:48px;height:3px;background:linear-gradient(90deg,var(--dyh-cyan),var(--dyh-pink));margin-top:10px;border-radius:2px}

.dyh-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:36px 0}
.dyh-stat{text-align:center;padding:20px 12px;background:var(--dyh-panel);border:1px solid var(--dyh-line);clip-path:polygon(0 8px,8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%)}
.dyh-stat strong{display:block;font-size:1.5rem;color:var(--dyh-pink);font-weight:900;margin-bottom:4px}
.dyh-stat span{font-size:.78rem;color:var(--dyh-muted)}

.dyh-bento{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.dyh-bento-item{padding:20px 16px;background:var(--dyh-panel);border:1px solid var(--dyh-line);position:relative;overflow:hidden}
.dyh-bento-item::after{content:"";position:absolute;top:0;left:0;width:3px;height:100%;background:var(--dyh-pink)}
.dyh-bento-item h3{font-size:.95rem;margin-bottom:8px;font-weight:700}
.dyh-bento-item p{font-size:.82rem;color:var(--dyh-muted);line-height:1.7}

.dyh-faq{max-width:720px;margin:0 auto}
.dyh-faq-item{border-bottom:1px solid var(--dyh-line)}
.dyh-faq-q{width:100%;text-align:left;background:none;border:none;color:var(--dyh-text);font-size:.92rem;font-weight:600;padding:16px 28px 16px 0;cursor:pointer;position:relative;font-family:inherit}
.dyh-faq-q::after{content:"+";position:absolute;right:0;top:50%;transform:translateY(-50%);color:var(--dyh-cyan);font-size:1.2rem;transition:transform .2s}
.dyh-faq-item.is-open .dyh-faq-q::after{content:"−"}
.dyh-faq-a{max-height:0;overflow:hidden;transition:max-height .3s,padding .3s;color:var(--dyh-muted);font-size:.86rem;line-height:1.8}
.dyh-faq-item.is-open .dyh-faq-a{max-height:400px;padding-bottom:16px}

.dyh-page-hero{padding:calc(var(--dyh-nav) + 40px) 0 36px;background:linear-gradient(180deg,var(--dyh-surface),var(--dyh-bg));border-bottom:1px solid var(--dyh-line)}
.dyh-page-hero h1{font-size:1.6rem;font-weight:800;margin-bottom:8px}
.dyh-page-hero p{color:var(--dyh-muted);font-size:.9rem}

.dyh-legal{padding:40px 0 60px}
.dyh-legal h2{font-size:1.1rem;margin:28px 0 12px;color:var(--dyh-cyan);font-weight:700}
.dyh-legal h2:first-child{margin-top:0}
.dyh-legal p,.dyh-legal li{color:var(--dyh-muted);font-size:.9rem;margin-bottom:10px}
.dyh-legal ul{padding-left:20px;margin-bottom:14px}
.dyh-legal li{margin-bottom:6px}

.dyh-error{padding:80px 0 60px;text-align:center}
.dyh-error h1{font-size:3rem;font-weight:900;color:var(--dyh-pink);margin-bottom:12px}
.dyh-error p{color:var(--dyh-muted);margin-bottom:24px;font-size:.95rem}

.dyh-footer{padding:40px 0 28px;border-top:1px solid var(--dyh-line);background:var(--dyh-surface)}
.dyh-footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px;margin-bottom:28px}
.dyh-footer-brand p{color:var(--dyh-muted);font-size:.82rem;margin-top:10px;line-height:1.7}
.dyh-footer h4{font-size:.84rem;margin-bottom:12px;color:#fff;font-weight:700}
.dyh-footer ul{list-style:none}
.dyh-footer li{margin-bottom:8px}
.dyh-footer a{font-size:.82rem;color:var(--dyh-muted)}
.dyh-footer a:hover{color:var(--dyh-cyan)}
.dyh-footer-copy{text-align:center;font-size:.76rem;color:var(--dyh-muted);padding-top:20px;border-top:1px solid var(--dyh-line)}

.dyh-prose{padding:48px 0}
.dyh-prose-inner{max-width:900px;margin:0 auto}
.dyh-prose-inner h2{font-size:1.3rem;font-weight:800;margin-bottom:14px}
.dyh-prose-inner h3{font-size:1rem;margin:22px 0 10px;color:var(--dyh-cyan);font-weight:700}
.dyh-prose-inner p{color:var(--dyh-muted);font-size:.9rem;margin-bottom:12px;line-height:1.92}
.dyh-prose-inner ul{padding-left:20px;margin-bottom:14px}
.dyh-prose-inner li{color:var(--dyh-muted);font-size:.88rem;margin-bottom:8px;line-height:1.8}
.dyh-cat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:24px}
.dyh-cat-card{background:var(--dyh-panel);border:1px solid var(--dyh-line);overflow:hidden}
.dyh-cat-card .dyh-phone-frame{border-radius:0;border:none;box-shadow:none}
.dyh-cat-card .dyh-phone-frame::before{display:none}
.dyh-cat-card-body{padding:14px 16px}
.dyh-cat-card-body h3{font-size:.92rem;margin-bottom:6px;font-weight:700;color:var(--dyh-text)}
.dyh-cat-card-body p{font-size:.82rem;color:var(--dyh-muted);line-height:1.75;margin:0}

@media(max-width:768px){
  .dyh-nav,.dyh-btn-dl--desktop{display:none}
  .dyh-menu-btn{display:block}
  .dyh-split,.dyh-split--rev{grid-template-columns:1fr;gap:20px}
  .dyh-split--rev .dyh-split-img,.dyh-split--rev .dyh-split-text{order:unset}
  .dyh-stats{grid-template-columns:repeat(2,1fr)}
  .dyh-bento{grid-template-columns:1fr}
  .dyh-footer-grid{grid-template-columns:1fr;gap:20px}
  .dyh-hero-lead{font-size:1.3rem}
  .dyh-split-text h2{font-size:1.2rem}
  .dyh-cat-grid{grid-template-columns:1fr}
}