[hidden]{display:none!important}

/* tgkvm 2026-10-17: the public site (site.html, docs/13 9).
   2026-10-27 (TP-20261021-27, design/mockups/site-v3.html): dark, high-tech: near-black blue-violet, thin glowing lines,
   an orange-to-violet gradient, glass cards. Light (the admin site's choice) is white and pale grey with the same
   gradient. No switch on the site. */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  color-scheme:dark;
  --bg:#07070d;--bg2:#0d0d18;--glass:rgba(255,255,255,.045);--glass2:rgba(255,255,255,.09);--line:rgba(255,255,255,.09);
  --text:#f2f1f7;--sub:#a3a1b5;--mute:#6d6b80;--navbg:rgba(7,7,13,.72);--glow1:rgba(123,92,255,.38);--glow2:rgba(255,91,46,.14);--grid:rgba(255,255,255,.035);--scr:#11111d;
  --a1:#ff7a4d;--a2:#7b5cff;--ok:#22c55e;--grad:linear-gradient(110deg,#ff8a5b,#ff5b2e 40%,#7b5cff);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Sans","PingFang SC","Noto Sans JP","Noto Sans SC","Microsoft YaHei",sans-serif;
}
:root[data-theme="light"]{
  color-scheme:light;
  --bg:#fff;--bg2:#f5f5f8;--glass:#fff;--glass2:#f1f0f6;--line:rgba(20,20,40,.09);
  --text:#14131f;--sub:#5d5b6e;--mute:#9795a6;--navbg:rgba(255,255,255,.82);--glow1:rgba(123,92,255,.16);--glow2:rgba(255,91,46,.10);--grid:rgba(20,20,60,.04);--scr:#eef0f6;
}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--font);font-size:15.5px;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,select{font:inherit;color:inherit}
.wrap{max-width:1200px;margin:0 auto;padding:0 28px}
.gt{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.center{text-align:center}.center .lead{margin-left:auto;margin-right:auto}
.muted{color:var(--sub)}.small{font-size:13px;color:var(--sub);margin-top:8px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 26px;border-radius:999px;font-weight:650;font-size:15px;background:var(--grad);color:#fff;
  box-shadow:0 10px 30px -10px rgba(255,91,46,.65);white-space:nowrap;border:0;cursor:pointer;transition:transform .15s,filter .15s}
.btn:hover{filter:brightness(1.08);transform:translateY(-1px)}
.btn.g{background:transparent;border:1px solid var(--line);box-shadow:none;color:var(--text)}.btn.g:hover{background:var(--glass2)}
.btn.sm{padding:6px 15px;font-size:13px}
.acts{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.acts.center{justify-content:center}

/* the top bar */
header.top{position:sticky;top:0;z-index:20;background:var(--navbg);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
header.top .wrap{height:62px;display:flex;align-items:center;gap:36px}
.logo{font-weight:800;font-size:18px;display:flex;align-items:center;gap:9px}.logo i{width:22px;height:22px;border-radius:7px;background:var(--grad);box-shadow:0 0 18px rgba(255,122,77,.45)}
.tabs{display:flex;gap:30px;font-size:14.5px}.tabs a{color:var(--sub);padding:20px 0}.tabs a:hover{color:var(--text)}.tabs a.on{color:var(--text);box-shadow:inset 0 -2px 0 var(--a1)}
header .r{margin-left:auto;display:flex;align-items:center;gap:16px;font-size:13.5px;color:var(--sub)}
header select{background:transparent;border:1px solid var(--line);border-radius:999px;padding:4px 10px;color:var(--sub)}
header select option{background:var(--bg);color:var(--text)}
.signin:hover{color:var(--text)}
.m-only{display:none}
.menu-btn{display:none;background:none;border:0;font-size:22px;color:var(--text);cursor:pointer;margin-left:auto}
.me{position:relative}.avatar{width:32px;height:32px;border-radius:50%;background:var(--grad);color:#fff;font-weight:700;border:0;cursor:pointer}
.drop{position:absolute;right:0;top:44px;width:260px;border-radius:16px;padding:6px;background:var(--bg2);border:1px solid var(--line);box-shadow:0 24px 60px rgba(0,0,0,.45);color:var(--text)}
.drop .who{padding:10px 12px;color:var(--mute);font-size:12.5px;border-bottom:1px solid var(--line);margin-bottom:4px;overflow:hidden;text-overflow:ellipsis}
.drop a,.drop button{display:block;width:100%;text-align:left;padding:9px 12px;border-radius:10px;font-size:14px;background:none;border:0;cursor:pointer}
.drop a:hover,.drop button:hover{background:var(--glass2)}.drop hr{border:0;border-top:1px solid var(--line);margin:4px 0}

/* pages */
.page{display:none}.page.on{display:block}
.blk{padding:100px max(28px,calc((100% - 1200px)/2 + 28px));position:relative}.blk.alt{background:var(--bg2)}
.eyebrow{font-size:12px;letter-spacing:.14em;color:var(--a1);font-weight:700;text-transform:uppercase}
h2.h{font-size:clamp(28px,4vw,42px);line-height:1.22;margin:10px 0 12px;letter-spacing:-.01em}h2.h.big{font-size:clamp(32px,4.6vw,52px)}
.lead{color:var(--sub);font-size:18px;max-width:760px}
.grid{display:grid;gap:16px;margin-top:44px}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}.g5{grid-template-columns:repeat(5,1fr)}
.card{background:var(--glass);border:1px solid var(--line);border-radius:20px;padding:26px;position:relative;overflow:hidden;text-align:left}
:root[data-theme="light"] .card{box-shadow:0 1px 2px rgba(20,20,40,.04),0 8px 24px -12px rgba(20,20,40,.12)}
.card h3{margin:12px 0 6px;font-size:18px}.card p{color:var(--sub);font-size:14.5px}
.ic{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;font-size:20px;background:linear-gradient(135deg,rgba(255,122,77,.18),rgba(123,92,255,.18));border:1px solid var(--line)}
.card.glow::before{content:"";position:absolute;inset:-1px;border-radius:20px;padding:1px;background:var(--grad);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none}

/* the carousel */
.car{position:relative;height:min(680px,calc(100vh - 62px));min-height:540px;overflow:hidden}
.car::before{content:"";position:absolute;left:50%;top:-280px;width:1200px;height:760px;transform:translateX(-50%);background:radial-gradient(closest-side,var(--glow1),var(--glow2) 55%,transparent 75%);pointer-events:none}
.car::after{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:56px 56px;
  -webkit-mask-image:radial-gradient(ellipse at 50% 35%,#000,transparent 70%);mask-image:radial-gradient(ellipse at 50% 35%,#000,transparent 70%);pointer-events:none}
.sl{position:absolute;inset:0;z-index:1;display:flex;align-items:center;gap:40px;padding:0 max(110px,calc((100% - 1200px)/2 + 40px));opacity:0;transform:translateX(40px);transition:opacity .8s,transform .8s;pointer-events:none}
.sl.on{opacity:1;transform:none;pointer-events:auto}
.sl .tx{flex:1;min-width:0}.sl .k{font-size:12px;letter-spacing:.16em;color:var(--a1);font-weight:700;text-transform:uppercase}
.sl h1{font-size:clamp(36px,5vw,62px);line-height:1.12;margin:14px 0 18px;letter-spacing:-.02em}.sl p{color:var(--sub);font-size:18px;max-width:480px}
.sl .vis{flex:1;display:grid;place-items:center}.sl .vis svg{width:100%;max-width:520px}
.arr{position:absolute;top:50%;z-index:3;transform:translateY(-50%);width:46px;height:46px;border-radius:50%;border:1px solid var(--line);background:var(--glass);color:var(--text);font-size:22px;cursor:pointer}
.arr:hover{background:var(--glass2)}.arr.l{left:32px}.arr.r{right:32px}
.dots{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);z-index:3;display:flex;gap:8px}
.dots button{width:8px;height:8px;border-radius:4px;background:var(--line);border:0;cursor:pointer;transition:.3s;padding:0}.dots button.on{width:26px;background:var(--a1)}
.f-scr{fill:var(--scr);stroke:var(--line)}.f-line{fill:var(--line)}.f-lines{stroke:var(--line)}.f-bg2{fill:var(--bg2)}.f-hand{stroke:var(--text)}.f-sub{fill:var(--sub)}.f-subs{stroke:var(--sub)}
@keyframes float{50%{transform:translateY(-14px)}}.float{animation:float 6s ease-in-out infinite}
@keyframes dash{to{stroke-dashoffset:0}}.flow{stroke-dasharray:6 8;stroke-dashoffset:280;animation:dash 4s linear infinite}
@keyframes pulse{50%{opacity:1}}.pulse{animation:pulse 2.4s ease-in-out infinite;opacity:.45}
@keyframes grow{from{transform:scaleX(0)}}.grow{transform-box:fill-box;transform-origin:left;animation:grow 2.4s ease-out infinite alternate}
@media (prefers-reduced-motion:reduce){.float,.flow,.pulse,.grow{animation:none}.sl{transition:none}}

/* why, ways, uses */
.vs-wrap{overflow-x:auto;margin-top:30px}
table.vs{width:100%;border-collapse:separate;border-spacing:0;border:1px solid var(--line);border-radius:16px;overflow:hidden;font-size:14.5px;text-align:left}
table.vs th,table.vs td{padding:13px 18px;border-bottom:1px solid var(--line)}table.vs tr:last-child td{border-bottom:0}
table.vs th{color:var(--sub);font-weight:500;font-size:13px}table.vs td{color:var(--sub)}table.vs td:first-child{color:var(--text)}
table.vs .us{background:rgba(255,122,77,.06);color:var(--a1);font-weight:700}
.way{display:flex;flex-direction:column;gap:10px}.way .k{font-size:12px;color:var(--a1);font-weight:700;letter-spacing:.1em}.way h3{margin:0;font-size:20px}
.way .fit{border-top:1px solid var(--line);padding-top:12px;margin-top:auto;font-size:13.5px;color:var(--sub)}.way .fit b{color:var(--text);font-weight:600}
.segs{display:inline-flex;gap:4px;background:var(--glass);border:1px solid var(--line);border-radius:999px;padding:4px;margin-top:30px;flex-wrap:wrap}
.segs button{padding:7px 20px;border-radius:999px;font-size:13.5px;color:var(--sub);background:none;border:0;cursor:pointer}.segs button.on{background:var(--grad);color:#fff;font-weight:650}
.uses{margin-top:22px}

/* plans */
.switch{display:inline-flex;gap:4px;background:var(--glass);border:1px solid var(--line);border-radius:999px;padding:3px;font-size:13px;margin-top:22px}
.switch button{padding:5px 16px;border-radius:999px;color:var(--sub);background:none;border:0;cursor:pointer}.switch button.on{background:var(--glass2);color:var(--text)}
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:40px}
.plan{display:flex;flex-direction:column;gap:4px}.plan h3{margin:4px 0 0}.plan .pr{font-size:38px;font-weight:800}.plan .pr small{font-size:14px;color:var(--sub);font-weight:400}
.plan .hrs{font-size:13px;color:var(--a1)}.plan ul{margin:14px 0 22px;list-style:none;font-size:14.5px;color:var(--sub)}
.plan li{padding:6px 0 6px 22px;position:relative}.plan li::before{content:"✓";position:absolute;left:0;color:var(--ok)}
.plan .btn{margin-top:auto}.badge{align-self:flex-start;font-size:11px;font-weight:700;padding:2px 10px;border-radius:999px;background:var(--grad);color:#fff}
.meter{margin-top:26px;border:1px solid var(--line);border-radius:16px;padding:18px 22px;display:flex;gap:30px;align-items:center;font-size:14px;color:var(--sub);flex-wrap:wrap}
.meter b{color:var(--text);font-size:22px;display:block}.meter .m3{margin-left:auto;max-width:360px}
.cta{text-align:center;padding:100px 28px;background:radial-gradient(ellipse at 50% 120%,var(--glow1),transparent 60%)}

/* product, support */
.prod{display:grid;grid-template-columns:1.1fr 1fr;gap:64px;align-items:center}
.stage{aspect-ratio:4/3;border-radius:28px;background:radial-gradient(circle at 30% 20%,var(--glow1),transparent 55%),radial-gradient(circle at 80% 90%,var(--glow2),transparent 50%),var(--bg2);border:1px solid var(--line);display:grid;place-items:center}
.stage svg{width:80%}
.price{font-size:34px;font-weight:800;margin:18px 0 0}.price small{font-size:13px;color:var(--sub);font-weight:400}
.prod + .grid{margin-top:64px}
.spec-h{margin:56px 0 0;font-size:20px}
.specs{columns:2;column-gap:48px;margin-top:16px}.specs div{break-inside:avoid;display:flex;gap:16px;padding:12px 0;border-bottom:1px solid var(--line);font-size:14px}.specs span{width:120px;color:var(--sub);flex:none}
.steps{text-align:left}.steps .n{font-size:46px;font-weight:800;line-height:1.2}
.two{display:grid;grid-template-columns:1fr 1fr;gap:70px}
.faq{margin-top:10px}.faq div{border-bottom:1px solid var(--line);padding:20px 0}.faq b{font-size:16.5px}.faq p{margin-top:6px;color:var(--sub)}
.contact{display:flex;gap:30px;align-items:center;padding:36px}.contact .ic{width:58px;height:58px;font-size:26px;flex:none}.contact .grow1{flex:1}.contact h3{margin:0 0 4px}
.c-act{text-align:right}

/* the shop (2026-10-27): the cart, the orders, a short message */
.cart{position:relative;font-size:18px}.cart b{position:absolute;top:-7px;right:-10px;background:var(--a1);color:#fff;font-size:10px;border-radius:9px;padding:0 5px;line-height:16px}
.card.cart{display:flex;align-items:center;gap:22px;margin-top:30px}.mini-box{width:120px;flex:none}.mini-box svg{width:100%}
.card.cart h3{margin:0}.card.cart p{color:var(--text);font-size:16px}.card.cart p small{color:var(--sub)}
.qty{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:999px;padding:4px}.qty button{width:32px;height:32px;border-radius:50%;border:0;background:var(--glass2);color:var(--text);cursor:pointer;font-size:16px}
.qty span{min-width:20px;text-align:center;font-weight:700}
button.link{background:none;border:0;color:var(--sub);cursor:pointer;text-decoration:underline}
.total{text-align:right;margin-top:18px;font-size:16px;color:var(--sub)}.total b{font-size:26px;color:var(--text);margin-left:8px}
.field{display:flex;align-items:center;gap:12px;justify-content:flex-end;margin-top:18px;color:var(--sub)}.field select{background:var(--glass);border:1px solid var(--line);border-radius:10px;padding:8px 12px;color:var(--text)}
.field select option{background:var(--bg)}
.note{color:var(--sub);text-align:right;margin-top:14px;font-size:14px}.note a{color:var(--a1)}.note.ok{text-align:left;color:var(--ok)}
.acts.end{justify-content:flex-end}
.orders{display:grid;gap:14px;margin-top:24px}.order .oh{display:flex;align-items:center;gap:12px}.order .oh b{font-size:16px}
.st{font-size:12px;padding:2px 10px;border-radius:999px;background:var(--glass2);color:var(--sub)}.st-paid{color:var(--a1)}.st-shipped{color:var(--ok)}.st-failed{color:#f87171}
.order .kv{display:grid;grid-template-columns:120px 1fr;gap:6px 16px;margin-top:12px;font-size:14px}.order .kv span{color:var(--sub)}
.toast{position:fixed;left:50%;bottom:30px;transform:translateX(-50%);z-index:50;background:var(--bg2);border:1px solid var(--line);border-radius:999px;padding:10px 20px;box-shadow:0 10px 30px rgba(0,0,0,.4)}
@media (max-width:760px){.card.cart{flex-wrap:wrap}.mini-box{width:80px}.order .kv{grid-template-columns:1fr}}
/* the terms, the policy, 特商法, contact: pages of the site (2026-10-27) */
.lhead{padding:70px 0 0;background:radial-gradient(ellipse at 50% -40%,var(--glow1),transparent 60%);border-bottom:1px solid var(--line)}
.lhead h1{font-size:clamp(28px,4vw,44px);margin:8px 0 6px;letter-spacing:-.01em}.lhead .muted{font-size:14px}
.ltabs{display:flex;gap:26px;margin-top:30px;font-size:14px;overflow-x:auto}.ltabs a{color:var(--sub);padding:12px 0;white-space:nowrap}.ltabs a:hover{color:var(--text)}.ltabs a.on{color:var(--text);box-shadow:inset 0 -2px 0 var(--a1)}
.tag-tbd{display:inline-block;font-size:12px;color:var(--a1);border:1px solid rgba(255,122,77,.35);background:rgba(255,122,77,.08);border-radius:999px;padding:0 8px;line-height:20px}
.ldoc{display:grid;grid-template-columns:240px minmax(0,720px);gap:60px;justify-content:center;padding-top:50px}
.ltoc{position:sticky;top:90px;align-self:start;font-size:13.5px}.ltoc summary{color:var(--mute);font-size:12px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:10px;list-style:none;cursor:pointer}
.ltoc summary::-webkit-details-marker{display:none}.ltoc a{display:block;color:var(--sub);padding:6px 0 6px 12px;border-left:1px solid var(--line)}.ltoc a:hover{color:var(--text);border-color:var(--a1)}.ltoc a.on{color:var(--a1);border-color:var(--a1);background:rgba(255,122,77,.06)}
.ltext{font-size:15px;line-height:1.85;color:var(--sub)}.ltext h2{color:var(--text);font-size:19px;margin:34px 0 10px;padding-top:30px;border-top:1px solid var(--line);scroll-margin-top:90px}.ltext h2:first-child{margin-top:0;padding-top:0;border-top:0}
.ltext p,.ltext ol,.ltext ul{margin:0 0 12px}.ltext ol,.ltext ul{padding-left:1.4em}.ltext li{margin:4px 0}.ltext b{color:var(--text)}
.ltext table{width:100%;border-collapse:collapse;font-size:14px;margin:8px 0 16px}.ltext th,.ltext td{border-bottom:1px solid var(--line);padding:9px 8px;text-align:left;vertical-align:top}.ltext th{color:var(--text)}
.ltext a{color:var(--a1)}
.ktable{max-width:900px;margin:0 auto;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:var(--glass)}
.kr{display:grid;grid-template-columns:260px 1fr;border-bottom:1px solid var(--line)}.kr:last-child{border-bottom:0}
.kk{padding:16px 20px;background:var(--glass2);font-weight:600;font-size:14px}.kv2{padding:16px 20px;white-space:pre-line;color:var(--sub);font-size:14px}
.cgrid{margin-top:0}.mailbox{display:flex;align-items:center;gap:22px;margin-top:22px;padding:30px}.mailbox .ic{width:58px;height:58px;font-size:26px;flex:none}
.mail{font-size:clamp(20px,3vw,30px);font-weight:700;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}.small0{font-size:13px}
.prep{margin-top:50px}.prep h3{font-size:18px;margin-bottom:12px}.chk{list-style:none}.chk li{padding:8px 0 8px 26px;position:relative;color:var(--sub);border-bottom:1px solid var(--line)}
.chk li::before{content:"✓";position:absolute;left:0;color:var(--a1)}
@media (max-width:960px){.ldoc{grid-template-columns:1fr;gap:20px}.ltoc{position:static}.ltoc summary{border:1px solid var(--line);border-radius:12px;padding:10px 14px;text-transform:none;letter-spacing:0;font-size:14px;color:var(--text)}.ltoc summary::after{content:' ▾';color:var(--mute)}.ltoc details:not([open]) a{display:none}.kr{grid-template-columns:1fr}.kk{padding-bottom:4px;background:none}.kv2{padding-top:0}}
@media (max-width:760px){.mailbox{flex-direction:column;align-items:flex-start}}
footer.foot{border-top:1px solid var(--line);color:var(--mute);font-size:12.5px}
footer.foot .wrap{display:flex;gap:24px;flex-wrap:wrap;padding-top:28px;padding-bottom:28px}footer.foot .wrap span{margin-right:auto}footer.foot a:hover{color:var(--text)}

/* phones and narrow windows */
@media (max-width:960px){
  .g4,.g5{grid-template-columns:repeat(2,1fr)}.g3,.plans,.prod,.two{grid-template-columns:1fr}.prod{gap:30px}
  .blk{padding:70px 22px}.specs{columns:1}
}
@media (max-width:760px){
  header.top .wrap{gap:12px;padding:0 16px}.menu-btn{display:block}header .r .signin{display:none}header select{max-width:96px}.tabs .m-only{display:block}
  .tabs{display:none;position:absolute;left:0;right:0;top:62px;flex-direction:column;gap:0;background:var(--bg2);border-bottom:1px solid var(--line);padding:6px 16px}
  .tabs.open{display:flex}.tabs a{padding:12px 0}.tabs a.on{box-shadow:none;color:var(--a1)}
  header .r{margin-left:0;gap:10px}
  .car{height:auto;min-height:0}.sl{position:relative;inset:auto;display:none;flex-direction:column;align-items:stretch;padding:40px 22px 70px;gap:10px;transform:none}
  .sl.on{display:flex}.sl .vis svg{max-width:340px}.arr{display:none}.sl .acts{flex-direction:column}.sl .acts .btn{width:100%}
  .g4,.g5{grid-template-columns:1fr}.meter .m3{margin-left:0}.contact{flex-direction:column;align-items:flex-start}.c-act{text-align:left}
}