/* 真人一对一直播 — 暖色社交匹配风 */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;background:#fff8f3;color:#3d2c22;line-height:1.7}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
button{font-family:inherit;cursor:pointer;border:none;background:none}

.yd-wrap{max-width:1100px;margin:0 auto;padding:0 22px}

/* header */
.yd-head{position:fixed;top:0;left:0;right:0;z-index:50;background:rgba(255,248,243,.85);backdrop-filter:blur(10px);transition:box-shadow .25s}
.yd-head.yd-stuck{box-shadow:0 6px 24px rgba(249,115,22,.12)}
.yd-bar{max-width:1100px;margin:0 auto;padding:14px 22px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.yd-brand{font-size:20px;font-weight:800;color:#f97316;letter-spacing:.5px}
.yd-nav{display:flex;gap:26px;font-size:15px;color:#6b5548}
.yd-nav a{padding:4px 2px;transition:color .2s}
.yd-nav a:hover,.yd-nav a.yd-cur{color:#f97316}
.yd-burger{display:none;font-size:24px;color:#f97316}

/* hero */
.yd-hero{padding:120px 0 70px;background:radial-gradient(1200px 500px at 80% -10%,#ffe0d1 0%,rgba(255,224,209,0) 60%),linear-gradient(180deg,#fff1e8 0%,#fff8f3 100%)}
.yd-hero-inner{max-width:900px;margin:0 auto;padding:0 22px;text-align:center}
.yd-eyebrow{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid #ffd9c2;color:#c2410c;padding:7px 16px;border-radius:999px;font-size:13px;margin-bottom:22px}
.yd-pulse-dot{width:8px;height:8px;border-radius:50%;background:#fb7185;display:inline-block;animation:ydPulse 1.4s infinite}
@keyframes ydPulse{0%{box-shadow:0 0 0 0 rgba(251,113,133,.55)}70%{box-shadow:0 0 0 10px rgba(251,113,133,0)}100%{box-shadow:0 0 0 0 rgba(251,113,133,0)}}
.yd-title{font-size:44px;line-height:1.25;font-weight:800;letter-spacing:1px}
.yd-title-hl{background:linear-gradient(120deg,#f97316,#fb7185);-webkit-background-clip:text;background-clip:text;color:transparent}
.yd-lead{margin:20px auto 0;max-width:640px;color:#7a6255;font-size:16px}

/* duo avatars */
.yd-match-duo{margin:44px auto 10px;position:relative;max-width:560px}
.yd-avatar-ring{width:150px;height:150px;border-radius:50%;padding:6px;background:linear-gradient(135deg,#f97316,#fb7185);box-shadow:0 14px 34px rgba(249,115,22,.25);display:inline-block;vertical-align:middle}
.yd-avatar{width:100%;height:100%;border-radius:50%;object-fit:cover;border:4px solid #fff}
.yd-link-waves{display:inline-block;vertical-align:middle;margin:0 18px;width:90px;text-align:center}
.yd-link-waves span{display:inline-block;width:6px;height:6px;margin:0 3px;border-radius:50%;background:#fb7185;animation:ydWave 1.2s infinite ease-in-out}
.yd-link-waves span:nth-child(2){animation-delay:.2s}
.yd-link-waves span:nth-child(3){animation-delay:.4s}
@keyframes ydWave{0%,100%{transform:translateY(0);opacity:.4}50%{transform:translateY(-6px);opacity:1}}
.yd-link-waves em{display:block;font-style:normal;font-size:12px;color:#fb7185;margin-top:6px}
.yd-match-card{margin:26px auto 0;background:#fff;border:1px solid #ffe1d0;border-radius:22px;padding:16px 20px;box-shadow:0 10px 30px rgba(249,115,22,.1);max-width:480px}
.yd-match-card p{font-size:14px;color:#6b5548;margin-top:8px}
.yd-live-chip{display:inline-flex;align-items:center;gap:6px;background:#f97316;color:#fff;font-size:12px;padding:4px 12px;border-radius:999px;font-weight:700}

/* buttons */
.yd-actions{margin-top:30px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.yd-actions-row{margin-top:0}
.yd-btn{display:inline-block;padding:14px 28px;border-radius:999px;font-size:15px;font-weight:700;transition:transform .2s,box-shadow .2s}
.yd-btn:active{transform:scale(.97)}
.yd-btn-primary{background:linear-gradient(120deg,#f97316,#fb7185);color:#fff;box-shadow:0 12px 26px rgba(249,115,22,.32)}
.yd-btn-ghost{background:#fff;color:#f97316;border:1.5px solid #ffc9a8}
.yd-btn-light{background:#fff;color:#f97316}

/* metrics */
.yd-hero-metrics{margin-top:44px;display:flex;justify-content:center;gap:40px;flex-wrap:wrap}
.yd-metric b,.yd-metric-num{display:block;font-size:30px;color:#f97316;font-weight:800}
.yd-metric span{font-size:13px;color:#8a7264}

/* sections */
.yd-section{padding:70px 0}
.yd-section-warm{background:linear-gradient(180deg,#fff8f3,#fff1e8)}
.yd-sec-head{text-align:center;max-width:640px;margin:0 auto 40px}
.yd-kicker{color:#fb7185;font-size:13px;letter-spacing:3px;font-weight:700;margin-bottom:10px}
.yd-sec-title{font-size:32px;font-weight:800}
.yd-sec-sub{color:#8a7264;margin-top:10px;font-size:15px}

/* steps */
.yd-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:36px}
.yd-step{background:#fff;border:1px solid #ffe4d1;border-radius:22px;padding:26px 22px;box-shadow:0 8px 22px rgba(249,115,22,.06)}
.yd-step-num{width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,#f97316,#fb7185);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;margin-bottom:14px}
.yd-step h3{font-size:18px;margin-bottom:8px}
.yd-step p{font-size:14px;color:#7a6255}
.yd-match-visual{position:relative;border-radius:24px;overflow:hidden;box-shadow:0 18px 40px rgba(249,115,22,.16)}
.yd-match-visual img{width:100%;height:340px;object-fit:cover}
.yd-match-note{position:absolute;left:20px;bottom:20px;background:rgba(255,255,255,.92);border-radius:16px;padding:10px 16px;font-size:13px;color:#6b5548;display:flex;align-items:center;gap:10px}

/* auth */
.yd-auth{display:grid;grid-template-columns:1fr 1.2fr;gap:36px;align-items:center}
.yd-auth-media{position:relative;border-radius:26px;overflow:hidden;box-shadow:0 18px 40px rgba(249,115,22,.18)}
.yd-auth-media img{width:100%;height:380px;object-fit:cover}
.yd-auth-badge{position:absolute;top:16px;right:16px;background:#fff;color:#f97316;font-weight:800;padding:8px 16px;border-radius:999px;font-size:14px;box-shadow:0 8px 20px rgba(0,0,0,.12)}
.yd-checklist{list-style:none}
.yd-checklist li{background:#fff;border-radius:18px;padding:16px 20px;margin-bottom:14px;border:1px solid #ffe4d1}
.yd-checklist b{display:block;color:#c2410c;margin-bottom:4px}
.yd-checklist span{font-size:14px;color:#7a6255}

/* hosts */
.yd-hosts{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.yd-host-card{background:#fff;border:1px solid #ffe4d1;border-radius:24px;padding:26px 16px;text-align:center;box-shadow:0 8px 22px rgba(249,115,22,.06)}
.yd-host-avatar{position:relative;width:110px;height:110px;margin:0 auto 14px;border-radius:50%;padding:5px;background:linear-gradient(135deg,#fb7185,#f97316)}
.yd-host-avatar img{width:100%;height:100%;border-radius:50%;object-fit:cover;border:3px solid #fff}
.yd-host-on{position:absolute;right:6px;bottom:6px;width:16px;height:16px;border-radius:50%;background:#22c55e;border:3px solid #fff}
.yd-host-on.yd-host-off{background:#cbd5e1}
.yd-host-card h3{font-size:16px}
.yd-host-card p{font-size:13px;color:#8a7264;margin:4px 0 10px}
.yd-host-tag{display:inline-block;background:#fff1e8;color:#f97316;padding:4px 12px;border-radius:999px;font-size:12px;font-weight:700}

/* channels */
.yd-channels{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.yd-channel-card{background:#fff;border-radius:22px;overflow:hidden;border:1px solid #ffe4d1;display:flex;flex-direction:column;box-shadow:0 8px 22px rgba(249,115,22,.06)}
.yd-channel-card img{height:160px;width:100%;object-fit:cover}
.yd-channel-card>div{padding:18px}
.yd-channel-card h3{font-size:17px;margin-bottom:6px}
.yd-channel-card p{font-size:13px;color:#7a6255}

/* reviews */
.yd-reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.yd-review-card{background:#fff;border:1px solid #ffe4d1;border-radius:22px;padding:24px;box-shadow:0 8px 22px rgba(249,115,22,.06)}
.yd-review-stars{color:#fb7185;letter-spacing:2px;margin-bottom:10px}
.yd-review-card p{font-size:14px;color:#5b463b}
.yd-review-card span{display:block;margin-top:12px;font-size:12px;color:#a08a7c}

/* join banner */
.yd-join{padding:20px 0 80px;background:#fff8f3}
.yd-join-inner{background:linear-gradient(120deg,#f97316,#fb7185);border-radius:28px;padding:44px;color:#fff;display:flex;align-items:center;justify-content:space-between;gap:24px;box-shadow:0 20px 44px rgba(249,115,22,.3)}
.yd-join-inner h2{font-size:26px;margin-bottom:10px}
.yd-join-inner p{font-size:14px;opacity:.92;max-width:560px}

/* faq */
.yd-faq{max-width:760px;margin:0 auto}
.yd-faq-item{background:#fff;border:1px solid #ffe4d1;border-radius:18px;margin-bottom:12px;overflow:hidden}
.yd-faq-q{width:100%;text-align:left;padding:18px 22px;font-size:15px;font-weight:700;display:flex;justify-content:space-between;align-items:center;color:#3d2c22}
.yd-faq-q i{font-style:normal;font-size:20px;color:#f97316;transition:transform .25s}
.yd-faq-item.yd-open .yd-faq-q i{transform:rotate(45deg)}
.yd-faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.yd-faq-a p{padding:0 22px 18px;font-size:14px;color:#7a6255}

/* footer */
.yd-foot{background:#3d2c22;color:#ffd9c2;text-align:center;padding:28px 20px;font-size:13px}
.yd-foot p{margin:4px 0}

/* toast */
.yd-toast{position:fixed;left:50%;bottom:40px;transform:translateX(-50%) translateY(20px);background:#3d2c22;color:#fff;padding:12px 22px;border-radius:999px;font-size:14px;opacity:0;pointer-events:none;transition:all .3s;z-index:99;max-width:90%;text-align:center}
.yd-toast.yd-show{opacity:1;transform:translateX(-50%) translateY(0)}

/* reveal */
.yd-reveal{opacity:0;transform:translateY(24px);transition:opacity .6s,transform .6s}
.yd-reveal.yd-in{opacity:1;transform:none}

/* responsive */
@media (max-width:860px){
  .yd-nav{position:fixed;top:58px;right:0;flex-direction:column;background:#fff;width:220px;padding:20px;gap:16px;border-radius:0 0 0 18px;box-shadow:0 14px 30px rgba(0,0,0,.12);transform:translateX(110%);transition:transform .25s}
  .yd-nav.yd-open{transform:none}
  .yd-burger{display:block}
  .yd-title{font-size:30px}
  .yd-steps,.yd-hosts,.yd-channels,.yd-reviews{grid-template-columns:1fr 1fr}
  .yd-auth{grid-template-columns:1fr}
  .yd-join-inner{flex-direction:column;text-align:center}
  .yd-match-duo .yd-link-waves{width:40px;margin:0 4px}
}
@media (max-width:520px){
  .yd-steps,.yd-hosts,.yd-channels,.yd-reviews{grid-template-columns:1fr}
  .yd-hero-metrics{gap:20px}
  .yd-avatar-ring{width:110px;height:110px}
}