@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700&family=Noto+Serif+SC:wght@400;500;600&family=Newsreader:ital,opsz,wght@0,6..72,300;0,6..72,400;1,6..72,300&family=DM+Sans:wght@400;500;600&family=Outfit:wght@500;600;700&family=ZCOOL+XiaoWei&display=swap");.twin-landing{--s1:4px;--s2:8px;--s3:12px;--s4:16px;--s5:24px;--s6:32px;--s7:48px;--t-xs:12px;--t-sm:13px;--t-base:14.5px;--t-md:16px;--t-lg:18px;--t-xl:22px;--t-2xl:28px;--t-3xl:36px;--font-body:"Noto Sans SC",-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;--font-num:"Outfit","SF Pro 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78%)}.twin-landing[data-dir=C]{--bg:#0F1A24;--surface:#172532;--surface-2:#1E2F3E;--surface-3:#263A4B;--ink:#EEF2F4;--ink-soft:#B5C2CA;--muted:#7C8E99;--line:rgba(255,255,255,.10);--line-strong:rgba(255,255,255,.2);--primary:#D9B25C;--primary-ink:#1A1408;--primary-soft:rgba(217,178,92,.16);--accent:#7FD6C2;--accent-soft:rgba(127,214,194,.14);--accent-ink:#CFF3EA;--ok:#5CC79A;--ok-bg:rgba(92,199,154,.14);--warn:#E3B95A;--warn-bg:rgba(227,185,90,.14);--bad:#F07B7B;--bad-bg:rgba(240,123,123,.14);--info:#7FB3E8;--info-bg:rgba(127,179,232,.14);--r:12px;--r-lg:18px;--r-pill:999px;--shadow:0 1px 0 rgba(255,255,255,.04) inset,0 8px 24px rgba(0,0,0,.35);--shadow-lg:0 30px 70px rgba(0,0,0,.55);--font-display:"ZCOOL XiaoWei","Noto Serif SC","Songti SC",serif;--display-weight:400;--display-track:.02em;--orb:conic-gradient(from 200deg,#D9B25C,#7FD6C2,#2A4A66,#D9B25C);color-scheme:dark}.twin-landing[data-dir=C] input,.twin-landing[data-dir=C] select,.twin-landing[data-dir=C] textarea{background:var(--surface-2);color:var(--ink)}.twin-landing h1,.twin-landing h2,.twin-landing h3{margin:0;font-family:var(--font-display);font-weight:var(--display-weight);letter-spacing:var(--display-track);text-wrap:balance;line-height:1.25}.twin-landing h1{font-size:var(--t-2xl)}.twin-landing h2{font-size:var(--t-xl)}.twin-landing h3{font-size:var(--t-md)}.twin-landing p{margin:0}.twin-landing .lede{color:var(--ink-soft);font-size:var(--t-md);max-width:60ch}.twin-landing .muted{color:var(--muted);font-size:var(--t-sm)}.twin-landing .small{font-size:var(--t-xs);color:var(--muted)}.twin-landing .eyebrow{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-ink);background:var(--accent-soft);display:inline-block;padding:3px 9px;border-radius:var(--r-pill);font-weight:600;font-family:var(--font-num)}.twin-landing[data-dir=C] .eyebrow{color:var(--accent)}.twin-landing 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.content.narrow{max-width:720px}.twin-landing .orb{display:block;width:64px;height:64px;border-radius:50%;background:var(--orb);flex:none;position:relative;box-shadow:var(--shadow)}.twin-landing .orb.lg{width:112px;height:112px}.twin-landing .orb.sm{width:36px;height:36px}.twin-landing .orb.xs{width:26px;height:26px}.twin-landing .orb.lg{--orb-size:112px}.twin-landing .orb.sm{--orb-size:36px}.twin-landing .orb.xs{--orb-size:26px}.twin-landing[data-dir=A] .orb{--orb-size:64px;background:var(--surface);border:1px solid var(--accent);display:grid;place-items:center;font-family:var(--font-display);color:var(--ink);box-shadow:0 0 0 4px var(--bg),0 0 0 5px var(--line)}.twin-landing[data-dir=A] .orb:before{content:var(--monogram);font-size:calc(var(--orb-size, 64px) * .42);line-height:1;font-weight:400}.twin-landing[data-dir=B] .orb:after{content:"";position:absolute;inset:-6px;border-radius:50%;border:2px solid var(--primary-soft);opacity:.8;animation:breathe 4s ease-in-out infinite}.twin-landing[data-dir=C] .orb{padding:3px;background:var(--orb)}.twin-landing[data-dir=C] .orb:before{content:"";position:absolute;inset:4px;border-radius:50%;background:var(--surface)}.twin-landing[data-dir=C] .orb:after{content:"";position:absolute;inset:9px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#2E4F6A,#172532 70%)}@keyframes breathe{0%,to{transform:scale(1);opacity:.8}50%{transform:scale(1.08);opacity:.35}}@media (prefers-reduced-motion:reduce){.twin-landing .orb:after,.twin-landing .typing i{animation:none}}.twin-landing .avatar-name{display:flex;align-items:center;gap:12px}.twin-landing .avatar-name b{font-family:var(--font-display);font-weight:var(--display-weight);font-size:var(--t-lg)}.twin-landing .card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:20px 22px;box-shadow:var(--shadow)}.twin-landing .card.quiet{background:var(--surface-2);box-shadow:none}.twin-landing .card.tight{padding:14px 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.btn.soft{background:var(--primary-soft)}.twin-landing .btn.soft{color:var(--primary);border-color:transparent}.twin-landing .btn.danger{background:transparent;color:var(--bad);border-color:var(--line)}.twin-landing .btn.danger:hover{background:var(--bad-bg)}.twin-landing .btn.sm{padding:6px 12px;font-size:var(--t-sm)}.twin-landing .btn.lg{padding:13px 24px;font-size:var(--t-md)}.twin-landing .btn.block{width:100%}.twin-landing .btn[disabled]{opacity:.5;cursor:not-allowed;filter:none}.twin-landing .link{background:none;border:0;color:var(--primary);font-weight:600;padding:0;font-size:var(--t-sm);text-decoration:underline;text-underline-offset:3px}.twin-landing .chip{display:inline-flex;align-items:center;gap:6px;font-size:var(--t-xs);font-weight:600;padding:3px 10px;border-radius:var(--r-pill);background:var(--surface-3);color:var(--ink-soft);white-space:nowrap}.twin-landing .chip:before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}.twin-landing .chip.ok{background:var(--ok-bg);color:var(--ok)}.twin-landing .chip.warn{background:var(--warn-bg);color:var(--warn)}.twin-landing .chip.bad{background:var(--bad-bg);color:var(--bad)}.twin-landing .chip.info{background:var(--info-bg);color:var(--info)}.twin-landing .chip.brand{background:var(--accent-soft);color:var(--accent-ink)}.twin-landing[data-dir=C] .chip.brand{color:var(--accent)}.twin-landing .banner{display:flex;gap:12px;align-items:flex-start;padding:12px 16px;border-radius:var(--r);border:1px solid transparent;font-size:var(--t-sm);line-height:1.6}.twin-landing .banner .ico{flex:none;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:700}.twin-landing .banner b{display:block;margin-bottom:2px}.twin-landing .banner.info{background:var(--info-bg);color:var(--info)}.twin-landing .banner.info .ico{background:var(--info);color:#fff}.twin-landing .banner.warn{background:var(--warn-bg);color:var(--warn)}.twin-landing .banner.warn .ico{background:var(--warn);color:#fff}.twin-landing .banner.bad{background:var(--bad-bg);color:var(--bad)}.twin-landing .banner.bad .ico{background:var(--bad);color:#fff}.twin-landing .banner.ok{background:var(--ok-bg);color:var(--ok)}.twin-landing .banner.ok .ico{background:var(--ok);color:#fff}.twin-landing .banner .act{margin-left:auto;flex:none}.twin-landing .field{display:flex;flex-direction:column;gap:6px}.twin-landing .field label{font-size:var(--t-sm);font-weight:600;color:var(--ink-soft)}.twin-landing .field .hint{font-size:var(--t-xs);color:var(--muted)}.twin-landing input[type=date],.twin-landing input[type=email],.twin-landing input[type=number],.twin-landing input[type=text],.twin-landing select,.twin-landing textarea{width:100%;padding:10px 13px;border:1px solid var(--line-strong);border-radius:var(--r);background:var(--surface);color:var(--ink);font-size:var(--t-base);line-height:1.5}.twin-landing input:focus,.twin-landing select:focus,.twin-landing 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i{position:absolute;top:-5px;width:16px;height:16px;border-radius:50%;background:var(--primary);border:2px solid var(--surface);box-shadow:var(--shadow)}.twin-landing .toggle{width:40px;height:24px;border-radius:12px;background:var(--surface-3);position:relative;border:0;flex:none}.twin-landing .toggle:after{content:"";position:absolute;top:3px;left:3px;width:18px;height:18px;border-radius:50%;background:#fff;box-shadow:0 1px 2px rgba(0,0,0,.25);transition:left .15s}.twin-landing .toggle[aria-checked=true]{background:var(--ok)}.twin-landing .toggle[aria-checked=true]:after{left:19px}.twin-landing .stepper{display:flex;gap:6px;row-gap:10px;align-items:center;flex-wrap:wrap}.twin-landing .stepper .st span{white-space:nowrap}.twin-landing .stepper .st{display:flex;align-items:center;gap:8px;font-size:var(--t-xs);color:var(--muted)}.twin-landing .stepper .st 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