/* แลนดิ้ง v4 "คีย์อาร์ต" — แปลงจาก docs/web/landing_v3/index.html (Snow เคาะ 30 ต.ค. 2569)
   ฟอนต์อยู่ใน fonts.css (ต้องโหลดก่อนไฟล์นี้) · ภาพพื้นหลังอยู่ static/img/landing/
   ภาพ keyart/game-b/hero สร้างด้วย AI มีคำชี้แจงท้ายหน้าในเทมเพลต ห้ามถอด */
:root{
  --bg:#080A1C;--bg-1:#0F1128;--bg-2:#161936;--bg-3:#1E2244;
  --ink:#F1EFFA;--ink-2:#BAB6D8;--rule:rgba(255,255,255,.1);--rule-2:rgba(255,255,255,.18);
  --brand:#6E4DC1;--volt:#B9A6F2;--live:#FF3B5C;
  --font-body:"Noto Sans Thai","Leelawadee UI","Segoe UI",Tahoma,sans-serif;
  --font-head:"Chakra Petch","Noto Sans Thai","Leelawadee UI",sans-serif;
  --maxw:clamp(72rem,80vw,100rem);
  --gutter:clamp(1.25rem,3vw,4rem);
  --gap:clamp(1rem,1.6vw,2rem);
  --sp:clamp(4.5rem,8vw,8.5rem);
  --r:10px;
}
*,*::before,*::after{box-sizing:border-box}
html{font-size:clamp(16px,10px + .5vw,24px);-webkit-text-size-adjust:100%;scroll-behavior:smooth;background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:1rem;line-height:1.7}
a{color:inherit}
img{max-width:100%;display:block}
:focus-visible{outline:3px solid var(--volt);outline-offset:3px;border-radius:4px}
h1,h2,h3{font-family:var(--font-head);font-weight:700;margin:0;line-height:1.25}
p,ul,ol{margin:0 0 1em}
ul,ol{padding-left:1.2em}
.wrap{width:min(100% - 2*var(--gutter),var(--maxw));margin-inline:auto}
.num{font-family:var(--font-head);font-weight:700;font-variant-numeric:tabular-nums}
.skip{position:absolute;left:-999px;top:.5rem;background:var(--bg-2);padding:.5rem .75rem;z-index:99}
.skip:focus{left:.5rem}
.chip{display:inline-block;font-family:var(--font-head);font-weight:700;font-size:.78rem;letter-spacing:.06em;line-height:1;padding:.5em .85em;border-radius:999px;border:1px solid var(--rule-2);color:var(--ink);background:rgba(8,10,28,.55);margin:0}
.chip-live{border-color:rgba(255,59,92,.55)}
.chip-live::before{content:"";display:inline-block;width:.55em;height:.55em;border-radius:50%;background:var(--live);box-shadow:0 0 10px var(--live);margin-right:.6em;vertical-align:.05em}
.chip-ok{background:var(--volt);color:#15102E;border-color:transparent}
.chip-pro{background:var(--brand);color:#fff;border-color:transparent}
.credit{font-size:.8rem;color:var(--ink-2);margin:1.4rem 0 0}

/* แถบบน: ใสเหนือคีย์อาร์ต แล้วทึบเมื่อเลื่อน */
.top{position:fixed;inset:0 0 auto 0;z-index:20;padding:.9rem 0;transition:background .25s,border-color .25s;border-bottom:1px solid transparent}
.top.solid{background:rgba(8,10,28,.92);border-bottom-color:var(--rule)}
.top-in{display:flex;align-items:center;justify-content:space-between;gap:var(--gap)}
.brand{display:inline-flex;align-items:center;gap:.65rem;text-decoration:none;white-space:nowrap}
.brand-mark{width:2.5rem;height:2.5rem;border-radius:.7rem}
.brand-text{font-family:var(--font-head);font-weight:700;font-size:1.6rem;line-height:1;letter-spacing:.01em}
.brand-live{color:var(--volt)}
.top nav{display:flex;gap:1.5rem;align-items:center;font-family:var(--font-head);font-weight:700;font-size:.85rem;letter-spacing:.05em}
.top nav a{text-decoration:none;color:var(--ink-2)}
.top nav a:hover{color:var(--ink)}
.top nav a.login{color:var(--ink);border:1px solid var(--rule-2);padding:.55rem 1rem;border-radius:.5rem;margin-left:.5rem}
.top nav a.login:hover{border-color:var(--volt);color:var(--volt)}

/* ฮีโร่: คีย์อาร์ตเต็มจอ ข้อความอยู่ล่างซ้ายบนม่านมืด */
.hero{position:relative;min-height:min(92vh,60rem);display:flex;flex-direction:column;justify-content:flex-end;padding:9rem 0 2rem;overflow:hidden}
.hero-art{position:absolute;inset:0;background:url(img/landing/keyart.jpg) center 35%/cover no-repeat}
.hero-art::after{content:"";position:absolute;inset:0;background:
  linear-gradient(180deg,rgba(8,10,28,.55) 0%,rgba(8,10,28,0) 28%,rgba(8,10,28,.15) 55%,rgba(8,10,28,.9) 82%,var(--bg) 100%),
  linear-gradient(90deg,rgba(8,10,28,.85) 0%,rgba(8,10,28,.45) 38%,rgba(8,10,28,0) 65%)}
.hero-in{position:relative;z-index:1;max-width:46rem;margin-inline:auto 0;width:min(100% - 2*var(--gutter),var(--maxw))}
.hero-in{margin-left:max(var(--gutter),calc((100% - var(--maxw)) / 2))}
h1{font-size:clamp(2.4rem,1.4rem + 2.6vw,4.4rem);line-height:1.12;letter-spacing:-.005em;margin:1.2rem 0 0;text-wrap:balance;text-shadow:0 2px 30px rgba(8,10,28,.9)}
h1 span{display:block}
.lede{font-size:1.12rem;line-height:1.65;color:var(--ink);opacity:.9;max-width:38ch;margin:1.3rem 0 0;text-shadow:0 1px 14px rgba(8,10,28,1)}
.hero-cta{margin:2rem 0 0}
.btn{display:inline-flex;align-items:center;gap:.7rem;background:#fff;color:#0B0B18;text-decoration:none;padding:1rem 1.7rem;font-family:var(--font-head);font-weight:700;font-size:1.08rem;letter-spacing:.03em;line-height:1.2;border-radius:.6rem;border:0;cursor:pointer;transition:transform .15s,background .15s;white-space:nowrap}
.btn:hover{background:var(--volt);transform:translateY(-1px)}
.btn svg{width:1.1em;height:1.1em;flex:none}
.meta{font-size:.85rem;color:var(--ink-2);margin:.9rem 0 0;line-height:1.7}
.meta .num{color:var(--ink)}
.hero-credit{position:relative;z-index:1;font-size:.75rem;color:var(--ink-2);margin:2.5rem auto 0}

/* ส่วน */
.sec{padding-top:var(--sp)}
.sec-head{max-width:60ch;margin-bottom:2.2rem}
.sec h2{font-size:clamp(1.7rem,1.2rem + 1.2vw,2.5rem);line-height:1.2}
.intro{font-size:1.1rem;color:var(--ink-2);margin:.9rem 0 0;max-width:60ch}

/* ตัวเชื่อม */
.bridge{display:grid;grid-template-columns:1fr 3.5rem 1.3fr 3.5rem 1fr;align-items:stretch}
.node{background:var(--bg-1);border:1px solid var(--rule);border-radius:var(--r);padding:1.4rem 1.4rem 1.3rem}
.node-core{background:var(--bg-2);border-color:var(--volt);box-shadow:0 0 0 1px var(--volt),0 0 40px rgba(185,166,242,.12)}
.node-logo{width:3rem;height:3rem;border-radius:.8rem;margin-bottom:.9rem}
.node-k{font-family:var(--font-head);font-weight:700;font-size:.78rem;letter-spacing:.08em;color:var(--volt);margin:0 0 .3rem}
.node h3{font-size:1.35rem;margin-bottom:.5rem}
.node-p{color:var(--ink-2);font-size:.95rem;margin:0 0 1rem}
.chips{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:.45rem}
.chips li{font-family:var(--font-head);font-weight:700;font-size:.8rem;letter-spacing:.03em;padding:.45em .8em;border:1px solid var(--rule-2);border-radius:999px;color:var(--ink)}
.node-list{list-style:none;margin:.6rem 0 0;padding:0}
.node-list li{padding:.5rem 0;border-top:1px solid var(--rule);font-size:.95rem;line-height:1.5}
.link{position:relative;display:flex;align-items:center}
.link::before{content:"";width:100%;height:2px;background:linear-gradient(90deg,var(--rule-2),var(--volt))}
.link::after{content:"";position:absolute;right:-1px;top:50%;width:.6rem;height:.6rem;border-top:2px solid var(--volt);border-right:2px solid var(--volt);transform:translateY(-50%) rotate(45deg)}
.link span{position:absolute;left:0;top:50%;width:.5rem;height:.5rem;margin-top:-.25rem;border-radius:50%;background:var(--volt);box-shadow:0 0 10px var(--volt);animation:flow 1.6s linear infinite}
@keyframes flow{from{left:0;opacity:0}15%{opacity:1}85%{opacity:1}to{left:calc(100% - .5rem);opacity:0}}

/* รายชื่อเกม (ขยายได้) */
.games-grid{display:grid;grid-template-columns:5fr 7fr;gap:calc(var(--gap) * 2);align-items:start}
.games-grid .sec-head{margin:0}
.games-credit{grid-column:2}
.gamelist{list-style:none;margin:0;padding:0;background:var(--bg-1);border:1px solid var(--rule);border-radius:var(--r)}
.gamelist li{display:grid;grid-template-columns:minmax(10rem,1fr) auto;gap:.3rem 1rem;align-items:center;padding:1rem 1.3rem;border-top:1px solid var(--rule)}
.gamelist li:first-child{border-top:0}
.g-name{font-family:var(--font-head);font-weight:700;font-size:1.15rem}
.g-desc{grid-column:1/-1;color:var(--ink-2);font-size:.92rem;line-height:1.5}
.g-next .g-name{color:var(--ink-2)}

/* ไทล์ */
.tiles{display:grid;gap:var(--gap)}
.tiles-3{grid-template-columns:repeat(3,1fr)}
.tiles-2{grid-template-columns:repeat(2,1fr)}
.tile{margin:0;background:var(--bg-1);border:1px solid var(--rule);border-radius:var(--r);overflow:hidden;transition:transform .2s,background .2s,border-color .2s}
.tile:hover{background:var(--bg-2);border-color:var(--rule-2);transform:translateY(-3px)}
.tile-art{position:relative;aspect-ratio:16/9;background:var(--bg-2);overflow:hidden}
.tile-art img{width:100%;height:100%;object-fit:cover;object-position:center}
.tile-art .chip{position:absolute;left:.9rem;top:.9rem}
.tile-art-next img{filter:saturate(.5) brightness(.55)}
.tile-art-shot{aspect-ratio:4/3;background:#000}
.tile-art-shot img{object-fit:contain}
.tile-body{padding:1.1rem 1.25rem 1.3rem}
.tile .cause{font-size:.95rem;color:var(--ink-2);margin:0 0 .3rem}
.tile .cause .num{color:var(--ink)}
.tile h3{font-size:1.25rem;line-height:1.3}
.tile h3 .num{color:var(--volt)}
.tile.game h3{font-size:1.4rem;margin-bottom:.8rem}
.tile.game ul{margin:0;padding:0;list-style:none}
.tile.game li{padding:.5rem 0;border-top:1px solid var(--rule);font-size:.95rem;line-height:1.5;color:var(--ink)}
.tile.game p{color:var(--ink-2);font-size:.95rem;margin:0}
.shot figcaption{font-size:.9rem;color:var(--ink-2);line-height:1.55}

/* แถบเหตุการณ์ (HUD) */
#feed{margin-top:var(--sp);padding:var(--sp) 0;background:linear-gradient(180deg,var(--bg) 0%,rgba(8,10,28,.82) 25%,rgba(8,10,28,.82) 75%,var(--bg) 100%),url(img/landing/game-b.jpg) center/cover no-repeat}
#feed.sec{padding-top:var(--sp)}
.feed-grid{display:grid;grid-template-columns:5fr 7fr;gap:calc(var(--gap) * 2);align-items:center}
.feed-copy h2{font-size:clamp(1.7rem,1.2rem + 1.2vw,2.5rem);line-height:1.2;margin-bottom:1.2rem}
.feed-copy p{color:var(--ink-2);max-width:48ch}
.hud{background:var(--bg-1);border:1px solid var(--rule-2);border-top:3px solid var(--volt);border-radius:var(--r);padding:.3rem 1.3rem 1.1rem}
.ledger-cap{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:.25rem 1.5rem;padding:.9rem 0 .6rem;font-family:var(--font-head);font-weight:700;font-size:.8rem;letter-spacing:.05em;color:var(--ink-2);border-bottom:1px solid var(--rule)}
.ledger-cap .live{color:var(--ink)}
.ledger-cap .live::before{content:"";display:inline-block;width:.55em;height:.55em;border-radius:50%;background:var(--live);box-shadow:0 0 8px var(--live);margin-right:.5em;vertical-align:1px}
.row{display:grid;grid-template-columns:5.2rem 1fr 1.15fr;gap:.2rem 1.2rem;align-items:baseline;padding:.8rem 0;border-bottom:1px solid var(--rule);font-size:1.02rem;line-height:1.45}
.row:last-child{border-bottom:0}
.row .t{font-family:var(--font-head);font-size:.8rem;color:var(--ink-2);letter-spacing:.04em;font-variant-numeric:tabular-nums}
.row .who{color:var(--ink-2);font-size:.95rem}
.row .q{font-family:var(--font-head);font-weight:700;font-size:1.1em;color:var(--volt)}
.row .game{color:var(--ink);border-left:3px solid var(--volt);padding-left:.75rem}
.row.queued .game{color:var(--ink-2);border-left-color:var(--rule-2)}
.row small{font-size:.8rem;color:var(--ink-2);margin-left:.3rem}
.js .ledger .row{opacity:0;transform:translateX(10px);transition:opacity .45s ease,transform .45s ease}
.js .ledger .row.in{opacity:1;transform:none}
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease}
.js .reveal.in{opacity:1;transform:none}

/* ขั้นตอน */
.how-grid{display:grid;grid-template-columns:5fr 7fr;gap:calc(var(--gap) * 2);align-items:start}
.how-grid .sec-head{margin:0}
.steps{list-style:none;margin:0;padding:0;counter-reset:s;background:var(--bg-1);border:1px solid var(--rule);border-radius:var(--r)}
.steps li{display:grid;grid-template-columns:3.6rem 1fr;gap:.2rem 1rem;padding:1.1rem 1.4rem;border-top:1px solid var(--rule)}
.steps li:first-child{border-top:0}
.steps li::before{counter-increment:s;content:counter(s,decimal-leading-zero);grid-row:span 2;font-family:var(--font-head);font-weight:700;font-size:1.7rem;color:var(--volt);line-height:1.1}
.steps h3{font-size:1.08rem;line-height:1.4}
.steps p{color:var(--ink-2);margin:0;font-size:.92rem}

/* ราคา */
.price-band{position:relative;padding-bottom:var(--sp);margin-top:var(--sp);background:
  linear-gradient(180deg,var(--bg) 0%,rgba(8,10,28,.75) 20%,rgba(8,10,28,.75) 80%,var(--bg) 100%),url(img/landing/hero.jpg) center/cover no-repeat}
.price-band .sec-head{margin-bottom:2.2rem}
.plans{display:grid;grid-template-columns:repeat(2,minmax(0,28rem));gap:var(--gap)}
.plan{position:relative;margin:0;background:var(--bg-1);border:1px solid var(--rule-2);border-radius:var(--r);padding:1.6rem 1.6rem 1.5rem}
.plan-pro{border-color:var(--brand);box-shadow:0 0 0 1px var(--brand);background:var(--bg-2)}
.plan .chip-pro{position:absolute;top:-.95rem;left:1.4rem;font-size:.85rem}
.plan h3{font-size:1rem;letter-spacing:.08em;color:var(--ink-2)}
.price{font-size:3.2rem;line-height:1.05;margin:.4rem 0 0}
.price small{font-family:var(--font-body);font-weight:400;font-size:1rem;color:var(--ink-2);margin-left:.5rem}
.plan ul{margin:1.3rem 0 1.4rem;padding:0;list-style:none}
.plan li{padding:.55rem 0;border-top:1px solid var(--rule);font-size:.98rem;line-height:1.5}
.price-notes{margin:2rem 0 0;padding:0 0 0 1.1em;font-size:.9rem;color:var(--ink-2);max-width:62ch}
.price-notes li{margin:.25rem 0}

/* คำถาม */
.faq-grid{display:grid;grid-template-columns:5fr 7fr;gap:calc(var(--gap) * 2)}
.faq-grid .sec-head{margin:0}
.faq details{border-top:1px solid var(--rule)}
.faq details:last-child{border-bottom:1px solid var(--rule)}
.faq summary{cursor:pointer;list-style:none;padding:1.05rem 2.5rem 1.05rem 0;font-size:1.06rem;line-height:1.45;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:.4rem;top:1.45rem;width:.6rem;height:.6rem;border-right:2px solid var(--volt);border-bottom:2px solid var(--volt);transform:rotate(45deg);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(225deg);top:1.75rem}
.faq details p{margin:0 0 1.2rem;color:var(--ink-2);max-width:60ch}

/* แถบปิดท้าย */
.cta-band{margin-top:var(--sp);padding:var(--sp) 0;border-top:1px solid var(--rule);background:linear-gradient(180deg,var(--bg),var(--bg-1))}
.cta-in{text-align:center;max-width:52rem}
.cta-in h2{font-size:clamp(1.6rem,1.1rem + 1.4vw,2.6rem);margin-bottom:1.6rem}
.cta-in .meta{max-width:60ch;margin-inline:auto}
.hash{font-family:ui-monospace,Consolas,"Cascadia Mono",monospace;font-size:.72rem;word-break:break-all;color:var(--ink-2);display:block;margin-top:.3rem}

/* ท้ายหน้า */
.foot{padding:2.5rem 0 3rem;border-top:1px solid var(--rule);background:var(--bg-1)}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:var(--gap);font-size:.9rem}
.foot-brand{display:flex;align-items:center;gap:.6rem;font-family:var(--font-head);font-weight:700;font-size:1.05rem}
.foot-brand img{width:1.75rem;height:1.75rem;border-radius:.45rem}
.foot h3{font-size:.78rem;letter-spacing:.08em;color:var(--ink-2);margin:0 0 .6rem}
.foot p{margin:0 0 .35rem}
.foot a{text-decoration-thickness:1px;text-underline-offset:3px}
.legal{margin:2rem auto 0;font-size:.78rem;color:var(--ink-2);max-width:90ch}

@media (max-width:1000px){
  .tiles-3{grid-template-columns:1fr 1fr}
  .feed-grid,.how-grid,.faq-grid,.games-grid{grid-template-columns:1fr;gap:var(--gap)}
  .games-credit{grid-column:1}
  .bridge{grid-template-columns:1fr;gap:0}
  .link{height:3rem;justify-content:center}
  .link::before{width:2px;height:100%;background:linear-gradient(180deg,var(--rule-2),var(--volt))}
  .link::after{right:auto;left:50%;top:auto;bottom:-1px;transform:translateX(-50%) rotate(135deg)}
  .link span{left:50%;top:0;margin:0 0 0 -.25rem;animation:flowv 1.6s linear infinite}
  @keyframes flowv{from{top:0;opacity:0}15%{opacity:1}85%{opacity:1}to{top:calc(100% - .5rem);opacity:0}}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .top{padding:.6rem 0}
  .top-in{flex-direction:column;align-items:flex-start;gap:.5rem}
  .top nav{gap:.9rem;font-size:.78rem;flex-wrap:wrap}
  .top nav a.login{padding:.4rem .7rem;margin-left:0}
  .brand-mark{width:2rem;height:2rem}
  .brand-text{font-size:1.3rem}
  .hero{min-height:auto;padding:9.5rem 0 1.5rem}
  .hero-art{background-position:58% 30%}
  .hero-in{margin-left:var(--gutter)}
  h1{font-size:2.2rem}
  .lede{font-size:1rem}
  .btn{width:100%;justify-content:center;white-space:normal}
  .tiles-3,.tiles-2,.plans{grid-template-columns:1fr}
  .row{grid-template-columns:1fr;gap:.15rem;padding:.7rem 0}
  .row .game{margin-top:.15rem}
  .hud{padding:.2rem .9rem .8rem}
  .steps li{padding:.9rem 1rem;grid-template-columns:2.8rem 1fr}
  .foot-grid{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .ledger .row,.js .reveal{opacity:1;transform:none;transition:none}
  .link span{animation:none;left:50%;opacity:1}
  .btn,.tile,.faq summary::after,.top{transition:none}
  .tile:hover{transform:none}
}