:root{
    --bg:#000; --bg-2:#0a0a0a;
    --surface:#111; --surface-2:#161616;
    --border:#222; --border-strong:#333;
    --text:#fff; --text-dim:#a1a1a6; --text-mute:#6e6e73;
    --accent:#fff; --accent-dim:rgba(255,255,255,.08);
    --warn:#6e6e73; --warn-dim:rgba(255,255,255,.06);
    --font:-apple-system,BlinkMacSystemFont,'SF Pro Display','SF Pro Text','Segoe UI','PingFang SC','Hiragino Sans','Yu Gothic','Malgun Gothic','Microsoft YaHei','Microsoft JhengHei',Roboto,'Helvetica Neue',Arial,sans-serif;
    --font-mono:'SF Mono',SFMono-Regular,ui-monospace,'Roboto Mono',Menlo,monospace;
    --maxw:1080px;
    --gutter:clamp(20px,5vw,48px);
    --r:16px;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
  body{background:var(--bg);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
  ::selection{background:var(--accent);color:#000}
  a{color:inherit;text-decoration:none}
  img{max-width:100%;display:block}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
  .mono{font-family:var(--font-mono)}

  .js-reveal .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
  .js-reveal .reveal.is-in{opacity:1;transform:none}
  @media (prefers-reduced-motion:reduce){
    .js-reveal .reveal{opacity:1!important;transform:none!important;transition:none!important}
    html{scroll-behavior:auto}
  }

  .eyebrow{font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--text-dim);display:inline-flex;align-items:center;gap:10px}
  .eyebrow::before{content:"";width:20px;height:1px;background:var(--border-strong)}
  h1,h2,h3{font-family:var(--font);font-weight:600;letter-spacing:-.02em;line-height:1.15}
  .h-display{font-size:clamp(2rem,6vw,3.2rem)}
  .h-section{font-size:clamp(1.5rem,3.6vw,2.2rem)}
  .lead{color:var(--text-dim);font-size:clamp(.98rem,1.4vw,1.1rem);max-width:60ch}
  .section{padding:clamp(52px,8vw,96px) 0}
  .section-head{margin-bottom:clamp(30px,5vw,48px);max-width:720px}

  .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;font-size:15px;padding:14px 24px;border-radius:12px;border:1px solid transparent;cursor:pointer;transition:transform .15s ease,background .2s ease,border-color .2s ease;text-align:center;line-height:1;min-height:46px}
  .btn-primary{background:var(--accent);color:#000}
  .btn-primary:hover{background:#e8e8ed;transform:translateY(-1px)}
  .btn-ghost{background:transparent;color:var(--text);border-color:var(--border-strong)}
  .btn-ghost:hover{border-color:var(--text-dim);color:var(--text)}
  .btn-lg{padding:16px 30px;font-size:16px;min-height:52px}

  .splash{position:fixed;inset:0;z-index:9999;background:#000;display:grid;place-items:center;transition:opacity .5s ease}
  .splash.hide{opacity:0;pointer-events:none}
  .splash-inner{display:grid;place-items:center;gap:16px}
  .spinner{width:40px;height:40px;border-radius:50%;border:2px solid #1c1c1c;border-top-color:#fff;animation:spin 1s linear infinite}
  @keyframes spin{to{transform:rotate(360deg)}}
  .splash-text{color:var(--text-mute);font-family:var(--font-mono);font-size:13px;letter-spacing:.12em}

  .topbar{position:sticky;top:0;z-index:50;background:rgba(0,0,0,.78);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
  .topbar-inner{display:flex;align-items:center;justify-content:space-between;height:60px;gap:12px}
  .brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:-.02em;flex-shrink:0}
  .brand-mark{width:26px;height:26px;display:grid;place-items:center;background:var(--accent);color:#000;border-radius:7px;font-family:var(--font-mono);font-size:13px;font-weight:600}
  .top-nav{display:flex;align-items:center;gap:26px}
  .top-nav a{color:var(--text-dim);font-size:14px;transition:color .2s}
  .top-nav a:hover{color:var(--text)}
  .top-right{display:flex;align-items:center;gap:12px}
  .lang-switch{position:relative;flex-shrink:0}
  .lang-current{display:inline-flex;align-items:center;gap:6px;background:var(--surface);border:1px solid var(--border);color:var(--text);font-family:var(--font-mono);font-size:12px;padding:6px 12px;border-radius:999px;cursor:pointer;min-height:32px;letter-spacing:.04em}
  .lang-current:hover{border-color:var(--border-strong)}
  .lang-current::after{content:"";width:5px;height:5px;border-right:1.5px solid var(--text-dim);border-bottom:1.5px solid var(--text-dim);transform:rotate(45deg) translateY(-1px);margin-left:2px}
  .lang-switch.open .lang-current{border-color:var(--text-dim)}
  .lang-menu{display:none;position:absolute;top:calc(100% + 8px);right:0;min-width:156px;background:var(--surface);border:1px solid var(--border-strong);border-radius:12px;padding:6px;z-index:80;box-shadow:0 12px 32px rgba(0,0,0,.45)}
  .lang-switch.open .lang-menu{display:block}
  .lang-menu button{width:100%;text-align:left;background:none;border:0;color:var(--text-dim);font-size:13px;padding:8px 10px;border-radius:8px;cursor:pointer;min-height:36px}
  .lang-menu button:hover{background:var(--surface-2);color:var(--text)}
  .lang-menu button.active{background:var(--accent);color:#000}
  :lang(zh) .eyebrow,:lang(zh-CN) .eyebrow,:lang(zh-TW) .eyebrow,:lang(ja) .eyebrow,:lang(ko) .eyebrow{letter-spacing:.06em;text-transform:none}
  @media (max-width:900px){.top-nav{display:none}}

  .hero{padding:clamp(40px,7vw,72px) 0 clamp(40px,6vw,72px)}
  .hero-grid{display:flex;flex-direction:column;align-items:center;text-align:center;gap:clamp(24px,4vw,40px);max-width:780px;margin:0 auto}
  .hero h1{margin:10px 0 14px}
  .hero .lead{margin:0 auto 24px;max-width:56ch}
  .hero-cta{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:center}
  .hero-cta .hint{color:var(--text-mute);font-size:13px;width:100%}
  .hero-stats{display:flex;flex-wrap:wrap;gap:24px 40px;justify-content:center;margin-top:20px;padding-top:24px;border-top:1px solid var(--border)}
  .hero-stats .num{font-weight:600;font-size:clamp(1.2rem,2.4vw,1.6rem);color:var(--text)}
  .hero-stats .lab{color:var(--text-mute);font-size:12px;margin-top:2px}
  .hero-media{width:100%;max-width:560px}

  .hero-globe{position:relative;aspect-ratio:16/9;border-radius:var(--r);overflow:hidden;background:#000;border:1px solid var(--border)}
  .hero-globe canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
  .hero-globe-tag{position:absolute;top:12px;left:12px;background:rgba(0,0,0,.7);backdrop-filter:blur(6px);border:1px solid var(--border-strong);color:var(--text-dim);font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;padding:5px 10px;border-radius:8px;z-index:2}
  .hero-cap{display:flex;gap:8px;align-items:flex-start;margin-top:12px;color:var(--text-mute);font-size:12.5px;line-height:1.5;text-align:left}
  .hero-cap .ic{color:var(--text-dim);flex-shrink:0}

  .trust{border-top:1px solid var(--border);border-bottom:1px solid var(--border);background:var(--bg-2)}
  .trust-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px 36px;padding:26px 0}
  .trust-item{display:flex;flex-direction:column;gap:2px}
  .trust-item .n{font-weight:600;font-size:1.35rem;color:var(--text)}
  .trust-item .l{font-size:12.5px;color:var(--text-mute)}
  .trust-tag{font-family:var(--font-mono);font-size:11.5px;color:var(--text-dim);letter-spacing:.04em;border:1px solid var(--border-strong);padding:7px 13px;border-radius:999px}

  .duo{display:grid;grid-template-columns:1fr 1fr;gap:20px}
  .duo-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:clamp(24px,2.8vw,32px)}
  .duo-card .tag{font-family:var(--font-mono);font-size:11.5px;color:var(--text-dim);letter-spacing:.08em;margin-bottom:12px;text-transform:uppercase}
  .duo-card h3{font-size:1.25rem;margin-bottom:8px}
  .duo-card p{color:var(--text-dim);font-size:14.5px;margin-bottom:16px}
  .duo-card ul{list-style:none;display:flex;flex-direction:column;gap:8px}
  .duo-card li{font-size:13.5px;color:var(--text);display:flex;gap:10px;align-items:flex-start}
  .duo-card li::before{content:"";width:5px;height:5px;border-radius:2px;background:var(--accent);margin-top:8px;flex-shrink:0}
  .duo-card .what-not{margin-top:16px;padding-top:14px;border-top:1px dashed var(--border-strong);font-size:12.5px;color:var(--text-mute)}
  @media (max-width:760px){.duo{grid-template-columns:1fr}}

  .modules{display:grid;border-top:1px solid var(--border)}
  .mod{display:grid;grid-template-columns:64px 1fr 1fr;gap:clamp(16px,3.5vw,40px);padding:clamp(22px,3vw,32px) 0;border-bottom:1px solid var(--border);align-items:start}
  .mod .idx{font-family:var(--font-mono);font-size:13px;color:var(--text-dim);letter-spacing:.06em;padding-top:3px}
  .mod h3{font-size:1.1rem;margin-bottom:6px}
  .mod .desc{color:var(--text-dim);font-size:14px}
  .mod .takeaway{font-size:13px;color:var(--text);background:var(--bg-2);border:1px solid var(--border);border-radius:10px;padding:11px 13px}
  .mod .takeaway b{color:var(--text);font-weight:600}
  @media (max-width:760px){.mod{grid-template-columns:48px 1fr}.mod .takeaway{grid-column:2}}

  .topics{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:var(--r);overflow:hidden}
  .topic{background:var(--surface);padding:clamp(20px,2.4vw,26px);transition:background .2s}
  .topic:hover{background:var(--surface-2)}
  .topic .name{display:flex;align-items:center;gap:10px;font-weight:600;font-size:1rem;margin-bottom:7px}
  .topic .name .ico{width:26px;height:26px;border:1px solid var(--border-strong);border-radius:7px;display:grid;place-items:center;color:var(--text-dim);font-family:var(--font-mono);font-size:10px}
  .topic .angle{font-size:13px;color:var(--text-dim)}
  @media (max-width:780px){.topics{grid-template-columns:1fr 1fr}}
  @media (max-width:520px){.topics{grid-template-columns:1fr}}

  .risk{position:relative;overflow:hidden;background:var(--bg-2);border:1px solid var(--border-strong);border-radius:var(--r);padding:clamp(26px,3.6vw,40px)}
  .risk .stripe{position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--accent)}
  .risk h2{margin:12px 0 14px}
  .risk-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px 36px;margin-top:22px}
  .risk-item{display:flex;gap:12px;align-items:flex-start}
  .risk-item .x{color:var(--text-mute);font-family:var(--font-mono);font-size:13px;flex-shrink:0;margin-top:2px}
  .risk-item .ck{color:var(--text);font-family:var(--font-mono);font-size:13px;flex-shrink:0;margin-top:2px}
  .risk-item p{font-size:14px;color:var(--text-dim)}
  .risk-item p b{color:var(--text);font-weight:600}
  @media (max-width:680px){.risk-grid{grid-template-columns:1fr}}

  .free{display:grid;grid-template-columns:1fr .9fr;gap:clamp(28px,4.5vw,52px);align-items:center}
  .free-list{list-style:none;display:flex;flex-direction:column;gap:12px;margin:20px 0 26px}
  .free-list li{display:flex;gap:12px;align-items:center;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:13px 15px}
  .free-list .ft{font-family:var(--font-mono);font-size:11px;color:var(--text-dim);border:1px solid var(--border-strong);border-radius:6px;padding:3px 7px;flex-shrink:0}
  .free-list .fn{font-size:14px;color:var(--text)}
  .free-list .fd{font-size:12px;color:var(--text-mute);margin-left:auto;flex-shrink:0}
  .free-side{background:var(--surface);border:1px solid var(--border-strong);border-radius:var(--r);padding:clamp(22px,2.8vw,30px)}
  .free-side .label{font-family:var(--font-mono);font-size:11.5px;color:var(--text-dim);letter-spacing:.1em;text-transform:uppercase}
  .free-side h3{font-size:1.4rem;margin:8px 0 6px}
  .free-side .price{font-size:13.5px;color:var(--text-dim);margin-bottom:20px}
  .free-side .price s{color:var(--text-mute)}
  .free-side .price b{color:var(--text);font-weight:600;font-size:15px}
  .join-note{font-size:12px;color:var(--text-mute);margin-top:14px;line-height:1.6}
  .qr{display:block;width:100%;aspect-ratio:1;max-width:170px;margin:12px auto 0;background:var(--bg);border:1px solid var(--border);border-radius:12px;overflow:hidden;transition:border-color .2s ease}
  .qr:hover{border-color:var(--text-dim)}
  .qr svg{width:100%;height:100%;display:block}
  @media (max-width:860px){.free{grid-template-columns:1fr}}

  .faq{display:flex;flex-direction:column;border-top:1px solid var(--border)}
  .faq-item{border-bottom:1px solid var(--border)}
  .faq-q{width:100%;background:none;border:0;color:var(--text);font-size:1rem;font-weight:600;text-align:left;padding:22px 0;display:flex;justify-content:space-between;gap:16px;align-items:center;cursor:pointer;min-height:44px}
  .faq-q .pm{color:var(--text-dim);font-size:1.3rem;flex-shrink:0;transition:transform .25s;font-family:var(--font-mono)}
  .faq-item.open .pm{transform:rotate(45deg)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;color:var(--text-dim);font-size:14px}
  .faq-a-inner{padding:0 0 22px;max-width:72ch}
  .faq-item.open .faq-a{max-height:520px}

  .final{background:var(--bg-2);border-top:1px solid var(--border);text-align:center}
  .final h2{font-size:clamp(1.7rem,4.5vw,2.6rem);margin-bottom:16px}
  .final .lead{margin:0 auto 28px}

  footer{border-top:1px solid var(--border);background:var(--bg-2);padding:40px 0 36px}
  .foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:28px;margin-bottom:30px}
  .foot-col h4{font-family:var(--font-mono);font-size:11.5px;color:var(--text-mute);letter-spacing:.1em;margin-bottom:12px;text-transform:uppercase}
  .foot-col a{display:block;color:var(--text-dim);font-size:13.5px;margin-bottom:8px;transition:color .2s}
  .foot-col a:hover{color:var(--text)}
  .disclaimer{font-size:12px;color:var(--text-mute);line-height:1.7;border-top:1px solid var(--border);padding-top:20px}
  .disclaimer b{color:var(--text-dim)}
  .copy{font-size:12px;color:var(--text-mute);margin-top:16px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
  @media (max-width:680px){.foot-grid{grid-template-columns:1fr}}

  /* 验证弹窗 */
  .v-modal{position:fixed;inset:0;z-index:1000;display:grid;place-items:center;padding:20px}
  .v-modal[hidden]{display:none}
  .v-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.7);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}
  .v-box{position:relative;width:100%;max-width:360px;background:var(--surface);border:1px solid var(--border-strong);border-radius:16px;padding:30px 24px 24px;text-align:center}
  .v-close{position:absolute;top:12px;right:14px;width:32px;height:32px;line-height:1;font-size:22px;color:var(--text-dim);cursor:pointer;display:grid;place-items:center;border-radius:8px}
  .v-close:hover{color:var(--text);background:var(--surface-2)}
  .v-box h3{margin:0 0 6px}
  .v-sub{color:var(--text-mute);font-size:13px;margin-bottom:18px}
  .v-q{display:flex;align-items:center;justify-content:center;gap:10px;font-family:var(--font-mono);font-size:20px;margin-bottom:14px}
  .v-opts{display:flex;gap:10px;justify-content:center;margin-bottom:4px}
  .v-opt{width:64px;height:46px;font-size:18px;font-family:var(--font-mono);background:var(--bg-2);border:1px solid var(--border-strong);border-radius:10px;color:var(--text);cursor:pointer}
  .v-opt:hover{border-color:var(--text-dim)}
  .v-err{display:none;color:var(--text-mute);font-size:12.5px;margin-bottom:12px}
  .keep-actions{display:grid;gap:10px;margin-top:6px}
  .keep-actions .btn{width:100%}
  body.v-open{overflow:hidden}

/* ---- 本地化补充：二维码图片与文字 ---- */
.qr{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;gap:8px;aspect-ratio:auto}
.qr img{width:100%;height:auto;aspect-ratio:1;object-fit:contain;display:block}
.qr .qr-tap{font-family:var(--font-mono);font-size:11px;color:var(--text-mute);letter-spacing:.06em}