:root{--bg:#F7F7F9;--glow:#E6EDFA;--surface:#FFFFFF;--surface2:#F2F2F5;--text:#1C1C1E;--text2:#636369;--text3:#6E6E75;--line:#E8E8EC;--accent:#4A75C6;--accent-press:#3F69B8;--tint:#E6EDFA;--accent-text:#3F69B8;--warn-bg:#FBF0DD;--warn:#8F5E12;--frame:#1C1C1E;--shadow:rgba(30,45,80,.14);color-scheme:light dark}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#0F0F11;--glow:#1F2A3D;--surface:#1C1C1E;--surface2:#26262A;--text:#F2F2F5;--text2:#BDBDC3;--text3:#8E8E95;--line:#2C2C30;--accent:#4A75C6;--accent-press:#3F69B8;--tint:#1F2A3D;--accent-text:#9FBCF0;--warn-bg:#33291A;--warn:#E0AE5E;--frame:#08080A;--shadow:rgba(0,0,0,.45);color-scheme:dark}}
:root[data-theme="dark"]{--bg:#0F0F11;--glow:#1F2A3D;--surface:#1C1C1E;--surface2:#26262A;--text:#F2F2F5;--text2:#BDBDC3;--text3:#8E8E95;--line:#2C2C30;--accent:#4A75C6;--accent-press:#3F69B8;--tint:#1F2A3D;--accent-text:#9FBCF0;--warn-bg:#33291A;--warn:#E0AE5E;--frame:#08080A;--shadow:rgba(0,0,0,.45);color-scheme:dark}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:radial-gradient(circle at 92% 0,var(--glow) 0,transparent 560px) no-repeat,var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;line-height:1.5;overflow-x:hidden}
a{color:var(--accent-text);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}
.skip:focus{left:12px;top:12px;background:var(--surface);padding:8px 12px;border-radius:8px;z-index:9}

/* 顶栏 */
.top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:18px;padding-bottom:18px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-size:19px;font-weight:600}
.brand:hover{text-decoration:none}
.logo{width:36px;height:36px;border-radius:11px;background:#F1F4FA;display:block;object-fit:cover;box-shadow:0 1px 3px rgba(35,50,90,.18);flex:none}
.top nav{display:flex;gap:18px;font-size:15px}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;height:56px;padding:0 30px;border-radius:999px;font-size:17px;font-weight:500;border:0;cursor:pointer;font-family:inherit;transition:background .15s ease}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--accent);color:#fff;min-width:220px}
.btn-primary:hover,.btn-primary:active{background:var(--accent-press)}
.btn-ghost{background:var(--surface);color:var(--text);border:1px solid var(--line)}
.btn-ghost:hover{background:var(--surface2)}
.btn-sm{height:48px;padding:0 26px;font-size:16px;min-width:0}

/* 首屏 */
.hero{position:relative;overflow:hidden}
.hero-in{position:relative;display:flex;flex-wrap:wrap;align-items:center;gap:44px;padding-top:28px;padding-bottom:72px}
.hero-copy{flex:1 1 440px;min-width:0;display:flex;flex-direction:column;gap:20px}
.pill{align-self:flex-start;display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:var(--tint);color:var(--accent-text);font-size:13px;font-weight:500}
.pill i{width:6px;height:6px;border-radius:50%;background:var(--accent)}
h1{margin:0;font-size:clamp(40px,6.4vw,72px);line-height:1.12;font-weight:600;letter-spacing:-.5px}
.lead{margin:0;font-size:clamp(16px,1.6vw,20px);line-height:1.6;color:var(--text2);max-width:30em}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:6px}
.meta{margin:0;font-size:13px;color:var(--text3)}
.qr{display:flex;align-items:center;gap:16px;padding:12px 18px 12px 12px;border-radius:16px;background:var(--surface);border:1px solid var(--line);align-self:flex-start}
.qr img{width:84px;height:84px;border-radius:8px;background:#fff;padding:4px}
.qr b{display:block;font-size:15px;font-weight:500}
.qr span{font-size:13px;color:var(--text2)}
.phones-box{flex:1 1 400px;min-width:0;display:flex;justify-content:center}
.phones{position:relative;width:100%;max-width:520px;aspect-ratio:1/1.02}
.phone{position:absolute;border-radius:34px;padding:7px;background:var(--frame);box-shadow:0 16px 36px var(--shadow);animation:rise .7s ease both}
.phone img{display:block;width:100%;height:auto;border-radius:28px}
.phone.l{left:0;top:9%;width:40%;transform:rotate(-7deg);animation-delay:.08s}
.phone.r{right:0;top:9%;width:40%;transform:rotate(7deg);animation-delay:.16s}
.phone.c{left:27%;top:0;width:46%;border-radius:38px;padding:8px;box-shadow:0 2px 6px var(--shadow),0 24px 48px var(--shadow)}
.phone.c img{border-radius:31px}
@keyframes rise{from{opacity:0;translate:0 24px}to{opacity:1;translate:0 0}}
@media (prefers-reduced-motion:reduce){.phone{animation:none}html{scroll-behavior:auto}}
.is-mobile .qr{display:none}

/* 区块 */
section{scroll-margin-top:16px}
.block{padding-bottom:76px}
h2{margin:0 0 8px;font-size:clamp(26px,3vw,36px);font-weight:600}
.sub{margin:0 0 26px;font-size:16px;color:var(--text2)}
.card{border-radius:16px;background:var(--surface);padding:22px}
.update{border-radius:22px;background:var(--surface);border:1px solid var(--line);padding:28px;display:flex;flex-wrap:wrap;gap:26px}
.update-h{flex:1 1 240px;display:flex;flex-direction:column;gap:6px}
.update-h small{font-size:13px;color:var(--text3)}
.update-h strong{font-size:26px;font-weight:600}
.update-h span{font-size:14px;color:var(--text2)}
.update-b{flex:2 1 400px;min-width:0;display:flex;flex-direction:column;gap:14px}
.update-b ul{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:6px;font-size:16px;line-height:1.6}
.notice{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;border-radius:12px;background:var(--warn-bg);color:var(--warn);font-size:14px;line-height:1.6}
.notice svg{flex:none;margin-top:3px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px}
.step{display:flex;flex-direction:column;gap:16px}
.step-pic{height:150px;border-radius:12px;background:var(--surface2);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;font-size:13px}
.mini-btn{display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 20px;border-radius:999px;background:var(--accent);color:#fff;font-size:14px;font-weight:500}
.mini-dialog{width:200px;border-radius:14px;background:var(--surface);padding:14px;box-shadow:0 8px 20px var(--shadow);display:flex;flex-direction:column;gap:12px;font-size:13px}
.mini-dialog div{display:flex;justify-content:flex-end;gap:16px}
.mini-dialog em{font-style:normal;color:var(--text3)}
.mini-dialog b{color:var(--accent-text)}
.mini-icon{width:56px;height:56px;border-radius:16px}
.step-t{display:flex;gap:12px;align-items:flex-start}
.num{flex:none;width:28px;height:28px;border-radius:50%;background:var(--tint);color:var(--accent-text);font-size:14px;font-weight:600;display:flex;align-items:center;justify-content:center}
.step-t b{display:block;font-size:17px;font-weight:500;margin-bottom:4px}
.step-t p{margin:0;font-size:14px;line-height:1.6;color:var(--text2)}
.band{background:var(--surface2);padding:72px 0;margin-bottom:72px}
.feat{display:flex;flex-direction:column;gap:12px}
.ico{width:44px;height:44px;border-radius:13px;background:var(--tint);color:var(--accent-text);display:flex;align-items:center;justify-content:center}
.feat b{font-size:18px;font-weight:500}
.feat p{margin:0;font-size:15px;line-height:1.6;color:var(--text2)}
.ios{border-radius:22px;background:var(--tint);padding:30px;display:flex;flex-wrap:wrap;gap:22px;align-items:center;justify-content:space-between}
.ios>div:first-child{flex:1 1 340px;min-width:0}
.ios>div>b{display:block;font-size:24px;font-weight:600;margin-bottom:6px}
.ios p{margin:0;font-size:16px;line-height:1.6;color:var(--text2)}
.ios-steps{flex:1 1 100%;margin:0;padding:0;list-style:none;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px}
.ios-steps li{display:flex;gap:12px;align-items:flex-start;background:var(--surface);border-radius:16px;padding:18px}
.ios-steps b{display:block;font-size:16px;font-weight:500;margin-bottom:4px}
.ios-steps p{font-size:14px}
.ios-notice{flex:1 1 100%}
.faq{max-width:840px;margin:0 auto}
.faq h2{text-align:center;margin-bottom:24px}
.faq-list{border-radius:16px;background:var(--surface);overflow:hidden}
details+details{border-top:1px solid var(--line)}
summary{list-style:none;min-height:60px;padding:16px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:16px;font-weight:500;cursor:pointer}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";flex:none;color:var(--text3);font-size:22px;line-height:1}
details[open] summary::after{content:"−"}
summary:hover{background:var(--surface2)}
details p{margin:0;padding:0 20px 18px;font-size:15px;line-height:1.7;color:var(--text2)}
code{font-family:ui-monospace,Menlo,monospace;font-size:12px;word-break:break-all}

/* 底部 */
.foot{border-top:1px solid var(--line)}
.foot-in{display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between;padding-top:32px;padding-bottom:44px}
.foot-in b{display:block;font-size:17px;margin-bottom:6px}
.foot-in p{margin:0 0 4px;font-size:14px;color:var(--text2)}
.foot-in small{font-size:13px;color:var(--text3)}
.foot nav{display:flex;gap:18px;font-size:14px}

/* 文章页（协议/隐私/客服） */
.doc{max-width:760px;margin:0 auto;padding:12px 20px 72px}
.doc h1{font-size:clamp(30px,5vw,40px);margin-bottom:8px}
.doc .dates{font-size:14px;color:var(--text3);margin:0 0 28px}
.doc h2{font-size:20px;margin:28px 0 10px}
.doc p{margin:0 0 10px;font-size:16px;line-height:1.8}
.doc .box{border-radius:16px;background:var(--surface);padding:22px;margin-bottom:16px}

/* 微信提示 */
.wx{position:fixed;inset:0;z-index:20;background:rgba(15,20,35,.74);display:none;flex-direction:column;align-items:flex-end;padding:14px 20px}
.in-wechat .wx{display:flex}
.wx-card{align-self:stretch;margin-top:10px;border-radius:22px;background:#fff;color:#1C1C1E;padding:24px;display:flex;flex-direction:column;gap:10px}
.wx-card b{font-size:20px}
.wx-card p{margin:0;font-size:15px;line-height:1.7;color:#636369}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);max-width:calc(100% - 32px);background:var(--text);color:var(--bg);padding:12px 18px;border-radius:12px;font-size:14px;line-height:1.6;display:none;z-index:30}
.toast.show{display:block}

@media (max-width:560px){
  .top nav a.hide-sm{display:none}
  .btn-primary{width:100%}
  .actions .btn-ghost{width:100%}
  .update,.ios{padding:22px}
}