/* === Reset & Base === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;background:#f5f7fd;color:#3a3a3a;line-height:1.75;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
ul,ol{list-style:none}

/* === 顶栏 === */
.top-bar{background:#fff;border-bottom:1px solid #e8ecfa;font-size:13px;color:#9e9e9e}
.tbin{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:36px}
.tbl{display:flex;gap:20px}
.tbl a{color:#8d8d8d}
.tbl a:hover{color:#1A237E}
.tbr{display:flex;gap:12px;align-items:center}
.tbr a{color:#666}
.tbr a:first-child{color:#1A237E;font-weight:600}

/* === 主导航 === */
.header{background:#fff;border-bottom:2px solid #1A237E;position:sticky;top:0;z-index:100}
.hdin{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;height:60px}
.logo{display:flex;align-items:center;gap:8px;font-size:22px;font-weight:700;color:#2c2c2c;margin-right:40px}
.logo-sm{width:34px;height:34px;background:linear-gradient(135deg,#3949AB,#1A237E);border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:18px;color:#fff}
.menu{display:flex;flex:1}
.menu a{padding:0 22px;height:60px;line-height:60px;font-size:15px;color:#444;font-weight:500;border-bottom:2px solid transparent;margin-bottom:-2px;transition:color .15s,border-color .15s;display:inline-block}
.menu a:hover,.menu a.cur{color:#1A237E;border-bottom-color:#1A237E}
.menu-reg{padding:8px 24px;background:linear-gradient(135deg,#3949AB,#1A237E);color:#fff;border:none;border-radius:4px;font-size:14px;font-weight:600;cursor:pointer;white-space:nowrap;display:inline-block}
.menu-reg:hover{opacity:.9}

/* === 面包屑 === */
.bread{max-width:1200px;margin:0 auto;padding:12px 24px;font-size:13px;color:#9e9e9e}
.bread a{color:#666}
.bread a:hover{color:#1A237E}

/* === 主布局 === */
.container{max-width:1200px;margin:0 auto 40px;padding:0 24px;display:flex;gap:20px}
.main{flex:1;min-width:0}
.aside{width:300px;flex-shrink:0}

/* === 产品头部 === */
.prod-box{background:#fff;border-radius:8px;box-shadow:0 1px 4px rgba(0,0,0,.06);padding:28px 32px;margin-bottom:20px;display:flex;gap:28px;align-items:center}
.prod-img{width:100px;height:100px;flex-shrink:0;background:linear-gradient(135deg,#3949AB,#1A237E);border-radius:16px;display:flex;align-items:center;justify-content:center}
.prod-img img{display:block;width:100%;height:100%;object-fit:contain;border-radius:16px}
.prod-text{flex:1;min-width:0}
.prod-text h1{font-size:24px;font-weight:700;color:#2c2c2c;margin-bottom:4px}
.prod-info{font-size:13px;color:#9e9e9e;margin-bottom:12px}
.prod-info span{margin-right:16px}

/* 邀请码 */
.key-area{display:flex;align-items:center;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.key-tag{font-size:14px;font-weight:600;color:#444;white-space:nowrap}
.key-display{display:inline-flex;align-items:center;background:#E8EAF6;border:1px solid #9FA8DA;border-radius:4px;padding:6px 16px}
.key-code{font-size:22px;font-weight:800;letter-spacing:1px;color:#1A237E;font-family:"Courier New",monospace}
.key-copy{margin-left:10px;padding:4px 14px;background:#fff;border:1px solid #9FA8DA;border-radius:3px;color:#1A237E;font-size:12px;cursor:pointer;transition:all .15s}
.key-copy:hover{background:#E8EAF6}
.key-copy.copied{background:#10b981;border-color:#10b981;color:#fff}

.prod-ctrl{display:flex;gap:10px}
.ctrl-go{display:inline-flex;align-items:center;gap:6px;padding:9px 24px;background:linear-gradient(135deg,#3949AB,#1A237E);color:#fff;border:none;border-radius:4px;font-size:14px;font-weight:600;cursor:pointer}
.ctrl-go:hover{opacity:.9}
.ctrl-sub{display:inline-flex;align-items:center;gap:6px;padding:9px 18px;background:#fff;color:#1A237E;border:1px solid #9FA8DA;border-radius:4px;font-size:14px;font-weight:500;cursor:pointer}
.ctrl-sub:hover{background:#E8EAF6}

/* 专区 */
.count-box{background:linear-gradient(135deg,#E8EAF6,#c5cae9);border:1px solid #9FA8DA;border-radius:8px;padding:20px 18px;text-align:center;flex-shrink:0;min-width:140px;display:block;transition:border-color .2s,box-shadow .2s}
a.count-box:hover{border-color:#1A237E;box-shadow:0 2px 8px rgba(26,35,126,.15)}
.count-box h4{font-size:14px;color:#1A237E;margin-bottom:6px}
.count-box .stats-num{font-size:28px;font-weight:800;color:#1A237E}
.count-box .stats-desc{font-size:12px;color:#9e9e9e}

/* === 通用板块 === */
.card{background:#fff;border-radius:8px;box-shadow:0 1px 4px rgba(0,0,0,.06);padding:24px;margin-bottom:20px}
.card-hd{font-size:18px;font-weight:700;color:#2c2c2c;display:flex;align-items:center;gap:8px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid #eef1f9}
.card-hd::before{content:'';width:3px;height:18px;background:#1A237E;border-radius:2px}
.sec{scroll-margin-top:80px}
.hd-icon{font-size:24px;margin-right:6px;vertical-align:middle}

/* === 三列网格 === */
.row3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.r3item{padding:20px 16px;background:#fafbfe;border:1px solid #eef1f9;border-radius:6px;text-align:center}
.r3item .r3ico{font-size:32px;margin-bottom:8px}
.r3item h5{font-size:14px;color:#3a3a3a;margin-bottom:4px}
.r3item p{font-size:12px;color:#888}

/* === 注册步骤 === */
.flow{display:flex;gap:20px}
.flow-item{flex:1;text-align:center;position:relative;padding:20px 12px;background:#fafbfe;border:1px solid #eef1f9;border-radius:6px}
.flow-item+.flow-item::after{content:'\2192';position:absolute;left:-16px;top:50%;transform:translateY(-50%);font-size:18px;color:#1A237E}
.flow-no{width:36px;height:36px;margin:0 auto 10px;background:linear-gradient(135deg,#3949AB,#1A237E);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700}
.flow-item h5{font-size:14px;color:#3a3a3a;margin-bottom:4px}
.flow-item small{font-size:12px;color:#9e9e9e}

/* === 两列网格 === */
.row2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.r2item{display:flex;gap:12px;padding:16px;background:#fafbfe;border:1px solid #eef1f9;border-radius:6px;align-items:flex-start}
.r2item .r2ico{font-size:24px;flex-shrink:0}
.r2item h5{font-size:14px;color:#3a3a3a;margin-bottom:4px}
.r2item p{font-size:12px;color:#888;line-height:1.6}

/* === 推广任务卡片 === */
.todo-list{display:flex;flex-direction:column;gap:12px}
.todo{padding:16px 18px;background:#fafbfe;border:1px solid #eef1f9;border-radius:6px;display:flex;gap:14px;align-items:flex-start}
.todo .todo-tag{flex-shrink:0;padding:4px 12px;background:linear-gradient(135deg,#3949AB,#1A237E);color:#fff;border-radius:3px;font-size:13px;font-weight:600;white-space:nowrap}
.todo .todo-bd h5{font-size:15px;color:#3a3a3a;margin-bottom:4px}
.todo .todo-bd p{font-size:13px;color:#666;line-height:1.7}

/* === FAQ === */
.faqs{display:flex;flex-direction:column;gap:12px}
.faqs-item{padding:14px 16px;background:#fafbfe;border:1px solid #eef1f9;border-radius:6px}
.faqs-item .faq-q{font-size:14px;font-weight:600;color:#3a3a3a;margin-bottom:6px}
.faqs-item .faq-a{font-size:13px;color:#666;line-height:1.7}

/* === 介绍文 === */
.desc-text{font-size:14px;color:#666;margin-bottom:18px;line-height:1.9}
.step-text{font-size:14px;color:#666;margin-bottom:16px}
.notice{margin-top:16px;padding:12px 16px;background:#E8EAF6;border:1px solid #9FA8DA;border-radius:4px;font-size:13px;color:#888}

/* === 下载区 === */
.dload{display:flex;gap:16px}
.dload-cell{flex:1;text-align:center;padding:24px 16px;background:#fafbfe;border:1px solid #eef1f9;border-radius:8px}
.dload-cell .dload-ico{font-size:36px;margin-bottom:10px}
.dload-cell h5{font-size:15px;color:#3a3a3a;margin-bottom:4px}
.dload-cell .dload-ver{font-size:12px;color:#9e9e9e;margin-bottom:12px}
.dload-btn{display:inline-block;padding:8px 24px;background:linear-gradient(135deg,#3949AB,#1A237E);color:#fff;border:none;border-radius:4px;font-size:14px;font-weight:600;cursor:pointer}
.dload-btn:hover{opacity:.9}
.qr-wrap{display:flex;align-items:center;justify-content:center;gap:24px;padding:20px;margin-top:16px}
.qr-img{width:120px;height:120px;background:#eef1f9;border:1px solid #e8ecfa;border-radius:4px;display:flex;align-items:center;justify-content:center;font-size:12px;color:#9e9e9e}
.dload-ps{font-size:12px;color:#9e9e9e;margin-top:12px;text-align:center}

/* === 侧栏 === */
.side-box{background:#fff;border-radius:8px;box-shadow:0 1px 4px rgba(0,0,0,.06);padding:20px;margin-bottom:20px}
.side-code{background:linear-gradient(135deg,#E8EAF6,#c5cae9);border:1px solid #9FA8DA;text-align:center}
.side-code .sc-tl{font-size:15px;color:#1A237E;margin-bottom:10px}
.side-code .sc-val{font-size:24px;font-weight:800;color:#1A237E;letter-spacing:1px;font-family:"Courier New",monospace;margin:8px 0}
.side-code .sc-btn{width:100%;padding:10px;background:linear-gradient(135deg,#3949AB,#1A237E);color:#fff;border:none;border-radius:4px;font-size:14px;font-weight:600;cursor:pointer}
.side-code .sc-note{font-size:11px;color:#aaa;margin-top:8px}
.side-tl{font-size:16px;font-weight:700;color:#2c2c2c;display:flex;align-items:center;gap:6px;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid #eef1f9}
.side-tl::before{content:'';width:3px;height:16px;background:#1A237E;border-radius:2px}
.top-list{display:flex;flex-direction:column;gap:10px}
.top-item{display:flex;align-items:center;justify-content:space-between;padding:8px 0;border-bottom:1px solid #f5f5f5;font-size:13px}
.top-item:last-child{border-bottom:none}
.top-tag{padding:1px 8px;border-radius:3px;font-size:11px;flex-shrink:0;margin-left:8px}
.tg-red{background:#ffeaea;color:#c62828;border:1px solid #ef9a9a}
.tg-green{background:#e8f5e9;color:#2e7d32;border:1px solid #a5d6a7}
.tg-blue{background:#e3f2fd;color:#1565c0;border:1px solid #90caf9}

/* === 侧栏列表 === */
.prop-list{display:flex;flex-direction:column;gap:10px}
.prop-item{display:flex;align-items:center;gap:8px;font-size:13px;color:#666}
.prop-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}

/* === 友链 === */
.links{max-width:1200px;margin:0 auto;padding:20px 24px;display:flex;align-items:center;gap:16px;font-size:13px;color:#9e9e9e;flex-wrap:wrap}
.links b{color:#666;white-space:nowrap}
.links a{color:#888}
.links a:hover{color:#1A237E}

/* === 底部 === */
.footer{background:#2c2c2c;color:#9e9e9e;padding:24px;text-align:center;font-size:13px}
.footer a{color:#bbb}
.footer a:hover{color:#1A237E}
.footer .footer-nav{margin-bottom:10px}
.footer .footer-copy{font-size:12px;color:#777;line-height:2}

/* === 响应式 === */
@media(max-width:900px){
  .container{flex-direction:column}
  .aside{width:100%}
  .prod-box{flex-direction:column;text-align:center}
  .count-box{width:100%}
  .key-area{justify-content:center}
  .prod-ctrl{justify-content:center}
  .row3{grid-template-columns:repeat(2,1fr)}
  .flow{flex-wrap:wrap}
  .flow-item+.flow-item::after{display:none}
  .row2{grid-template-columns:1fr}
  .dload{flex-direction:column}
  .menu{display:none}
}
@media(max-width:480px){
  .row3{grid-template-columns:1fr}
  .top-bar{display:none}
  .bread{display:none}
}