/* 赏帮赚五屏全屏落地页样式 */
*{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%;overflow:hidden;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;color:#fff}
a{text-decoration:none;color:inherit}

/* ===== 全屏滚动容器（纵向排列 + transform 平移）===== */
#fp{position:fixed;inset:0;width:100vw;height:100vh;overflow:hidden}
#fp-wrap{position:absolute;top:0;left:0;width:100%;height:500vh;
  transition:transform .9s cubic-bezier(.65,.05,.36,1);will-change:transform}
.section{position:relative;width:100vw;height:100vh;overflow:hidden}

/* 背景层：真实AI主题图 */
.section .bg{position:absolute;inset:0;z-index:0}
.section .bg img,
.section .bg{width:100%;height:100%;object-fit:cover;display:block}
/* 对比度遮罩：解决"背景盖字看不清"。左侧强遮保证文字区可读，右侧弱遮保留手机/插画可视 */
.scrim{position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(90deg,rgba(20,12,6,.72) 0%,rgba(20,12,6,.45) 42%,rgba(20,12,6,.18) 70%,rgba(20,12,6,.08) 100%)}
.section-2 .scrim{background:linear-gradient(90deg,rgba(60,15,20,.6) 0%,rgba(60,15,20,.35) 45%,rgba(60,15,20,.12) 75%)}
.section-3 .scrim{background:linear-gradient(90deg,rgba(40,25,70,.6) 0%,rgba(40,25,70,.35) 45%,rgba(40,25,70,.12) 75%)}
.section-4 .scrim{background:linear-gradient(90deg,rgba(15,35,75,.6) 0%,rgba(15,35,75,.32) 45%,rgba(15,35,75,.1) 75%)}
.section-5 .scrim{background:linear-gradient(90deg,rgba(60,30,10,.6) 0%,rgba(60,30,10,.35) 45%,rgba(60,30,10,.12) 75%)}

/* ===== 头部 ===== */
.head{position:absolute;top:26px;left:0;width:100%;padding:0 44px;display:flex;align-items:center;justify-content:space-between;z-index:10}
.logo{height:52px;width:auto;filter:drop-shadow(0 2px 6px rgba(0,0,0,.25))}
.kf-top{display:flex;align-items:center;gap:14px}
.kf-top img{height:40px;width:auto;cursor:pointer;filter:drop-shadow(0 2px 6px rgba(0,0,0,.2))}

/* ===== 左侧文字区 ===== */
.left{position:absolute;left:7%;top:50%;transform:translateY(-50%);z-index:5;max-width:520px;color:#fff}
.bar{width:5px;height:64px;background:#ffb347;border-radius:3px;margin-bottom:20px;box-shadow:0 0 14px rgba(255,180,60,.6)}
.title{font-size:56px;font-weight:800;line-height:1.12;letter-spacing:1px;color:#fff;
  text-shadow:0 4px 22px rgba(0,0,0,.45),0 2px 6px rgba(0,0,0,.35)}
.sub{font-size:19px;color:#ffd9a8;letter-spacing:3px;margin:14px 0 18px;font-weight:500;
  text-shadow:0 2px 8px rgba(0,0,0,.3)}
.desc{font-size:19px;line-height:1.7;color:#f3ead8;font-weight:500;
  text-shadow:0 2px 10px rgba(0,0,0,.35)}
.tags{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 6px}
.tags span{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.35);
  color:#fff;font-size:14px;padding:6px 14px;border-radius:20px;backdrop-filter:blur(4px);
  text-shadow:0 1px 4px rgba(0,0,0,.25)}

/* ===== 二维码（PC 显示 / 移动端隐藏）===== */
.qr{display:inline-flex;flex-direction:column;align-items:center;gap:8px;margin:24px 0 6px;
  background:rgba(255,255,255,.94);border-radius:14px;padding:12px 14px 10px;color:#333;
  box-shadow:0 8px 26px rgba(0,0,0,.28)}
.qr img,.qr .qr-canvas{width:118px;height:118px;display:block;border-radius:6px}
.qr span{font-size:13px;color:#c0392b;font-weight:700}
.qr-center{display:flex;flex-direction:column;align-items:center;gap:8px;margin-top:20px}
.qr-center img,.qr-center .qr-canvas{width:128px;height:128px;border-radius:8px;
  background:#fff;padding:6px;box-shadow:0 6px 20px rgba(0,0,0,.25)}

/* ===== 下载按钮 ===== */
.dl-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:linear-gradient(135deg,#ff6a1f,#ff8c2a);color:#fff;font-size:19px;font-weight:800;
  padding:14px 34px;border-radius:40px;border:none;cursor:pointer;margin-top:8px;
  box-shadow:0 10px 24px rgba(255,106,31,.45),0 2px 6px rgba(0,0,0,.2);
  transition:transform .2s,box-shadow .2s}
.dl-btn:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(255,106,31,.55)}
.dl-btn.outline{background:transparent;border:2px solid #fff;box-shadow:none;margin-top:24px}
.dl-btn.outline:hover{background:rgba(255,255,255,.16)}

/* ===== 右侧主视觉 ===== */
.right{position:absolute;right:6%;top:50%;transform:translateY(-50%);z-index:4}
.hero-phone{width:360px;height:auto;filter:drop-shadow(0 24px 50px rgba(0,0,0,.4));border-radius:34px}

/* 第2屏：大奖卡片 */
.prize-card{position:relative;width:380px;background:linear-gradient(160deg,rgba(255,255,255,.96),rgba(255,240,220,.96));
  border-radius:26px;padding:34px 26px;text-align:center;color:#c0392b;box-shadow:0 20px 50px rgba(0,0,0,.35);
  border:3px solid #ffd9a0}
.prize-label{display:inline-block;background:#c0392b;color:#fff;font-size:14px;font-weight:700;
  padding:5px 14px;border-radius:20px;margin-bottom:10px}
.prize-num{display:block;font-size:54px;font-weight:900;line-height:1;margin:6px 0 8px;color:#e74c3c;
  text-shadow:0 2px 0 #f5c6c0}
.prize-tip{display:block;font-size:13px;color:#8a5a2b;margin-top:6px}
.coin{position:absolute;font-size:34px;font-weight:900;color:#f5b301;text-shadow:0 2px 0 #c98a02}
.coin.c1{top:-16px;left:-14px;font-size:44px}.coin.c2{bottom:-14px;right:-10px;font-size:38px}

/* 第3屏：任务截图 */
.shot{position:absolute;border-radius:24px;box-shadow:0 18px 44px rgba(0,0,0,.4);
  border:6px solid #2a1f4a;background:#fff}
.shot-list{width:300px;right:40px;top:6%;transform:rotate(3deg)}
.shot-reward{width:280px;right:230px;top:38%;transform:rotate(-4deg);border-color:#7a2030}

/* 第4屏：邀请卡片 */
.invite-cards{display:flex;flex-direction:column;gap:16px;align-items:flex-end;right:8%}
.icard{width:300px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.4);
  backdrop-filter:blur(8px);border-radius:18px;padding:16px 20px;color:#fff;display:flex;align-items:center;gap:16px;
  transition:transform .25s,background .25s;box-shadow:0 8px 24px rgba(0,0,0,.2)}
.icard:hover{transform:translateY(-4px);background:rgba(255,255,255,.22)}
.icard b{font-size:30px;font-weight:900;color:#ffd54a;min-width:64px;text-align:center}
.icard span{font-size:15px;font-weight:600}

/* ===== 第5屏 footer ===== */
.foot{position:absolute;bottom:0;left:0;width:100%;z-index:8;padding:18px 40px 14px;
  background:linear-gradient(0deg,rgba(0,0,0,.72),rgba(0,0,0,.15) 90%);color:#fff}
.foot-bar{display:flex;align-items:center;justify-content:center;gap:22px;flex-wrap:wrap;font-size:14px}
.foot-bar a,.foot-bar .copy,.foot-bar .icp a{color:#ddd;text-decoration:none}
.info-toggle{background:transparent;color:#ffd9a8;border:1px solid rgba(255,217,168,.6);
  padding:5px 14px;border-radius:18px;cursor:pointer;font-size:13px}
.info-toggle:hover{background:rgba(255,217,168,.18)}
.foot-tip{text-align:center;font-size:13px;color:#cfcfcf;margin-top:8px;letter-spacing:1px}

/* 公司信息弹窗 */
.info-modal{position:fixed;inset:0;z-index:9999;background:rgba(0,0,0,.55);display:flex;align-items:center;justify-content:center}
.info-modal[hidden]{display:none}
.info-modal__box{background:#fff;color:#333;border-radius:16px;padding:28px 30px;max-width:520px;width:90%;position:relative;
  box-shadow:0 20px 60px rgba(0,0,0,.4)}
.info-modal__box h4{font-size:20px;color:#c0392b;margin-bottom:12px}
.info-modal__box p{font-size:14px;line-height:1.7;margin:6px 0}
.info-modal__close{position:absolute;top:10px;right:14px;background:none;border:none;font-size:26px;cursor:pointer;color:#999}

/* ===== 客服浮窗 ===== */
.kf-btn{position:fixed;right:26px;bottom:120px;z-index:9000;width:60px;height:60px;border-radius:50%;
  background:#ff6a1f;box-shadow:0 8px 22px rgba(255,106,31,.5);cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:transform .2s}
.kf-btn:hover{transform:scale(1.08)}
.kf-btn img{width:34px;height:34px}

/* ===== 右侧导航圆点 ===== */
.fp-nav{position:fixed;right:20px;top:50%;transform:translateY(-50%);z-index:9500;display:flex;flex-direction:column;gap:14px}
.fp-nav i{width:12px;height:12px;border-radius:50%;background:rgba(255,255,255,.45);cursor:pointer;
  box-shadow:0 0 0 2px rgba(0,0,0,.15);transition:background .2s,transform .2s}
.fp-nav i.on{background:#ff6a1f;transform:scale(1.25)}

/* ===== 入场动画（active 驱动）===== */
.hero-phone,.prize-card,.shot,.icard,.title,.desc,.bar,.dl-btn,.qr,.tags{opacity:0;transform:translateY(28px);
  transition:opacity .8s ease,transform .8s cubic-bezier(.2,.7,.2,1)}
.section.active .hero-phone,
.section.active .prize-card,
.section.active .shot,
.section.active .icard,
.section.active .title,
.section.active .desc,
.section.active .bar,
.section.active .dl-btn,
.section.active .qr,
.section.active .tags{opacity:1;transform:translateY(0)}
.section.active .bar{transition-delay:.05s}
.section.active .title{transition-delay:.15s}
.section.active .sub{opacity:1}
.section.active .desc{transition-delay:.35s}
.section.active .qr{transition-delay:.45s}
.section.active .dl-btn{transition-delay:.55s}
.section.active .tags{transition-delay:.5s}
.section.active .hero-phone{transition-delay:.25s}
.section.active .prize-card{transition-delay:.3s}
.section.active .shot-list{transition-delay:.35s}
.section.active .shot-reward{transition-delay:.5s}
.section.active .icard:nth-child(1){transition-delay:.3s}
.section.active .icard:nth-child(2){transition-delay:.42s}
.section.active .icard:nth-child(3){transition-delay:.54s}
.sub{opacity:0;transition:opacity .6s .2s}

/* ===== 响应式：平板 ===== */
@media (max-width:1024px){
  .title{font-size:44px}.desc{font-size:17px}.hero-phone{width:300px}
  .left{max-width:440px}.prize-card{width:320px}.shot-list{width:250px}.shot-reward{width:230px;right:190px}
}
/* ===== 响应式：手机 ===== */
@media (max-width:768px){
  .head{padding:0 18px;top:16px}.logo{height:42px}.kf-top img{height:32px}
  .left{left:6%;right:6%;max-width:none;top:46%}
  .title{font-size:34px}.sub{font-size:15px;margin:8px 0 12px}.desc{font-size:15px;line-height:1.6}
  .bar{width:4px;height:44px;margin-bottom:12px}
  /* 手机端：隐藏二维码，只保留下载按钮 */
  .qr,.qr-center{display:none}
  .dl-btn{font-size:17px;padding:12px 28px;margin-top:14px}
  .right{display:none}  /* 手机端隐藏右侧大图，避免遮挡文字 */
  .invite-cards{align-items:center;right:auto;left:6%}
  .icard{width:88vw;justify-content:center}
  .foot{padding:12px 14px 10px}.foot-bar{font-size:12px;gap:10px}
  .fp-nav{right:10px;gap:10px}.fp-nav i{width:10px;height:10px}
  .kf-btn{right:14px;bottom:90px;width:52px;height:52px}
  .kf-btn img{width:28px;height:28px}
}
@media (max-width:420px){
  .title{font-size:28px}.desc{font-size:14px}.tags span{font-size:12px;padding:5px 10px}
}