:root{--black-950:#050505;--black-900:#0a0a0a;--black-850:#121212;--black-800:#1a1a1a;--black-700:#262626;--paper:#f4f4f4;--paper-2:#e9e9e9;--white:#fff;--ink:#0a0a0a;--ink-2:#333;--ink-3:#5e5e5e;--mist:#ededed;--mist-2:#a8a8a8;--mist-3:#8c8c8c;--red:#fc0014;--red-strong:#e00012;--red-hover:#c40010;--red-bright:#f34;--red-ink:#d10011;--gray:#5e5e5e;--silver:#c8c8c8;--danger:#ff6b6b;--danger-ink:#b42318;--success:#3ddc97;--success-ink:#067647;--line-dark:#ffffff1f;--line-dark-strong:#ffffff38;--line-light:#0a0a0a1f;--line-light-strong:#0a0a0a3d;--focus:var(--ink);--radius-sm:8px;--radius:14px;--radius-lg:22px;--container:1200px;--gutter:clamp(16px, 4vw, 40px);--header-h:72px;--font-sans:"Inter Variable", "Noto Sans Thai Variable", "Noto Sans Thai", "Leelawadee UI", system-ui, -apple-system, "Segoe UI", sans-serif;--font-display:"Space Grotesk Variable", "Inter Variable", "Noto Sans Thai Variable", "Noto Sans Thai", system-ui, sans-serif;--lh-body:1.7;--lh-heading:1.18;--ease:cubic-bezier(.2, .7, .2, 1);color-scheme:light}:lang(th){--lh-body:1.8;--lh-heading:1.38}:lang(ru){--font-display:"Inter Variable", system-ui, sans-serif;--lh-heading:1.2}:lang(zh-Hans){--font-sans:"Inter Variable", "Noto Sans SC Variable", "PingFang SC", "Microsoft YaHei", sans-serif;--font-display:"Inter Variable", "Noto Sans SC Variable", "PingFang SC", "Microsoft YaHei", sans-serif;--lh-body:1.85;--lh-heading:1.35}:lang(ko){--font-sans:"Inter Variable", "Noto Sans KR Variable", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;--font-display:"Inter Variable", "Noto Sans KR Variable", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;--lh-body:1.8;--lh-heading:1.35}:lang(ko) body{word-break:keep-all}:lang(ru) p,:lang(ru) li{hyphens:auto}*,:before,:after{box-sizing:border-box}[hidden]{display:none!important}html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:calc(var(--header-h) + 16px)}@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}body{background:var(--paper);color:var(--ink);font-family:var(--font-sans);font-size:1.0625rem;line-height:var(--lh-body);font-feature-settings:"cv11", "ss01";text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;overflow-wrap:break-word;margin:0}img,svg,canvas,video{max-width:100%;display:block}img{height:auto}h1,h2,h3,h4{font-family:var(--font-display);line-height:var(--lh-heading);letter-spacing:-.015em;text-wrap:balance;margin:0;font-weight:650}:lang(th) :is(h1,h2,h3,h4),:lang(zh-Hans) :is(h1,h2,h3,h4),:lang(ko) :is(h1,h2,h3,h4){letter-spacing:0}p{text-wrap:pretty;margin:0}ul,ol{margin:0;padding:0}a{color:inherit;text-underline-offset:.2em;text-decoration-thickness:1px}button,input,select,textarea{font:inherit;color:inherit}:focus-visible{outline:3px solid var(--focus);outline-offset:3px;border-radius:6px}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;position:absolute!important}.skip-link{z-index:100;background:var(--red-strong);color:var(--white);border-radius:var(--radius-sm);padding:10px 16px;font-weight:600;text-decoration:none;position:absolute;top:-100px;left:16px}.skip-link:focus{top:12px}.container{width:100%;max-width:calc(var(--container) + var(--gutter) * 2);padding-inline:var(--gutter);margin-inline:auto}.section{padding-block:clamp(64px,9vw,120px);position:relative}.section.is-tight{padding-block:clamp(48px,6vw,80px)}.is-dark{background:var(--black-900);color:var(--mist);--heading:var(--white);--muted:var(--mist-2);--line:var(--line-dark);--line-strong:var(--line-dark-strong);--accent-text:var(--red-bright);--tech-text:var(--silver);--surface:#ffffff08;--surface-2:#ffffff0f;--focus:var(--white);color-scheme:dark}.is-light{background:var(--paper);color:var(--ink-2);--heading:var(--ink);--muted:var(--ink-3);--line:var(--line-light);--line-strong:var(--line-light-strong);--accent-text:var(--red-ink);--tech-text:var(--gray);--surface:var(--white);--surface-2:var(--paper-2);--focus:var(--ink)}.is-white{background:var(--white)}:is(.is-dark,.is-light) :is(h1,h2,h3,h4){color:var(--heading)}.section-head{gap:16px;max-width:760px;margin-bottom:clamp(32px,5vw,56px);display:grid}.section-head.is-center{text-align:center;justify-items:center;margin-inline:auto}.section-head h2{font-size:clamp(1.65rem,1.1rem + 1.9vw,2.55rem)}.lead{color:var(--muted);max-width:68ch;font-size:clamp(1.05rem,1rem + .3vw,1.2rem)}.eyebrow{font-family:var(--font-sans);letter-spacing:.08em;text-transform:uppercase;color:var(--accent-text);align-items:center;gap:10px;font-size:.8125rem;font-weight:600;display:inline-flex}:lang(th) .eyebrow,:lang(zh-Hans) .eyebrow,:lang(ko) .eyebrow{letter-spacing:.02em;font-size:.875rem}.eyebrow:before{content:"";background:var(--red);border-radius:50%;flex:none;width:8px;height:8px;box-shadow:0 0 0 4px #fc00142e,0 0 16px #fc001499}.btn{--btn-bg:transparent;--btn-fg:currentColor;--btn-border:var(--line-strong);border:1px solid var(--btn-border);background:var(--btn-bg);min-height:48px;color:var(--btn-fg);text-align:center;cursor:pointer;transition:background-color .2s var(--ease), box-shadow .2s var(--ease), transform .2s var(--ease), border-color .2s var(--ease);border-radius:999px;justify-content:center;align-items:center;gap:10px;padding:10px 22px;font-size:1rem;font-weight:600;line-height:1.3;text-decoration:none;display:inline-flex}.btn svg{width:18px;height:18px;transition:transform .2s var(--ease);flex:none}.btn:hover svg.arrow{transform:translate(3px)}.btn-primary{--btn-bg:var(--red-strong);--btn-fg:var(--white);--btn-border:var(--red-strong);box-shadow:0 8px 26px -12px #e00012bf}.btn-primary:hover{--btn-bg:var(--red-hover);--btn-border:var(--red-hover);box-shadow:0 10px 30px -10px #e00012d9}.btn-ghost{--btn-fg:var(--heading)}.btn-ghost:hover{--btn-bg:var(--surface-2);--btn-border:var(--heading)}.btn-sm{min-height:40px;padding:8px 16px;font-size:.9375rem}.btn[disabled],.btn[aria-disabled=true]{opacity:.65;cursor:progress}.btn-row{flex-wrap:wrap;gap:12px;display:flex}.link-arrow{color:var(--heading);align-items:center;gap:8px;font-weight:600;text-decoration:none;display:inline-flex}.link-arrow svg{width:16px;height:16px;transition:transform .2s var(--ease);color:var(--accent-text)}.link-arrow:hover{text-decoration:underline}.link-arrow:hover svg{transform:translate(3px)}.badge{border:1px solid var(--line-strong);color:var(--muted);background:var(--surface);white-space:nowrap;border-radius:999px;align-items:center;gap:6px;padding:3px 10px;font-size:.78rem;font-weight:600;line-height:1.5;display:inline-flex}.badge:before{content:"";opacity:.8;background:currentColor;border-radius:50%;width:6px;height:6px}.badge.is-draft{color:var(--red-ink);background:#fff1f2;border:1px dashed #d100118c}.is-dark .badge.is-draft{color:var(--red-bright);background:#fc00141a;border-color:#ff33448c}.badge.is-illustration{color:var(--tech-text);border-color:color-mix(in srgb, var(--tech-text) 40%, transparent)}.badge.is-concept{color:var(--tech-text);border-color:color-mix(in srgb, var(--tech-text) 45%, transparent)}.badge.is-plain:before{display:none}.chip-list{flex-wrap:wrap;gap:8px;list-style:none;display:flex}.chip{border:1px solid var(--line-strong);color:var(--heading);border-radius:999px;align-items:center;padding:4px 12px;font-size:.85rem;line-height:1.5;text-decoration:none;display:inline-flex}a.chip:hover{border-color:var(--accent-text);color:var(--accent-text)}.card{border-radius:var(--radius-lg);border:1px solid var(--line);background:var(--surface);align-content:start;gap:14px;padding:clamp(22px,2.5vw,30px);display:grid;position:relative}.is-light .card{box-shadow:0 1px 2px #0a0a0a0a,0 12px 32px -20px #0a0a0a2e}.card h3{font-size:clamp(1.12rem,1rem + .4vw,1.3rem)}.callout{border-radius:var(--radius);border:1px solid var(--line);border-left:3px solid var(--red-strong);background:var(--surface);color:var(--muted);gap:8px;padding:18px 20px;font-size:.97rem;display:grid}.callout strong{color:var(--heading);font-weight:600}.callout.is-tech{border-left-color:var(--silver)}.list-check{gap:12px;list-style:none;display:grid}.list-check li{padding-left:30px;position:relative}.list-check li:before{content:"";border:1.5px solid var(--accent-text);background:radial-gradient(circle, var(--accent-text) 0 3px, transparent 3.5px);border-radius:50%;width:16px;height:16px;position:absolute;top:.55em;left:2px}.list-check.is-outline li:before{border-style:dashed;border-color:var(--tech-text);background:0 0}.grid{gap:clamp(16px,2vw,24px);display:grid}@media (width>=720px){.grid-2,.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width>=1000px){.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}}@media (width>=720px) and (width<=999px){.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}}.bg-grid{pointer-events:none;background-image:linear-gradient(var(--line-dark) 1px, transparent 1px), linear-gradient(90deg, var(--line-dark) 1px, transparent 1px);opacity:.55;background-size:64px 64px;position:absolute;inset:0;mask-image:radial-gradient(70% 60% at 70% 40%,#000 20%,#0000 75%)}.bg-glow{pointer-events:none;filter:blur(10px);background:radial-gradient(circle,#fc001438,#fc00140f 40%,#0000 70%);border-radius:50%;position:absolute}.section>.container{position:relative}.page-hero{padding-block:clamp(56px,8vw,104px) clamp(48px,6vw,80px);overflow:hidden}.page-hero h1{max-width:22ch;font-size:clamp(1.9rem,1.2rem + 2.6vw,3.2rem)}:lang(th) .page-hero h1,:lang(ru) .page-hero h1{max-width:28ch}.page-hero .lead{margin-top:20px}.page-hero .btn-row{margin-top:32px}.breadcrumb{color:var(--muted);flex-wrap:wrap;gap:8px;margin-bottom:20px;font-size:.9rem;list-style:none;display:flex}.breadcrumb li+li:before{content:"/";opacity:.6;margin-right:8px}.breadcrumb a{color:inherit}.facts{border-top:1px solid var(--line);gap:0;margin:0;display:grid}.facts>div{border-bottom:1px solid var(--line);gap:4px 24px;padding:14px 0;display:grid}@media (width>=640px){.facts>div{grid-template-columns:minmax(160px,34%) 1fr}}.facts dt{color:var(--muted);font-size:.92rem}.facts dd{color:var(--heading);margin:0;font-weight:500}.facts dd .badge{vertical-align:middle;margin-left:8px}.prose{gap:18px;max-width:72ch;display:grid}.prose h2{margin-top:18px;font-size:1.45rem}.prose ul{gap:8px;padding-left:1.3em;display:grid}@media (prefers-reduced-motion:no-preference){.js [data-reveal]{opacity:0;transition:opacity .7s var(--ease), transform .7s var(--ease);transform:translateY(14px)}.js [data-reveal].is-in{opacity:1;transform:none}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.001ms!important;animation-duration:.001ms!important;animation-iteration-count:1!important}}.preview-banner{color:#ffc2c7;padding:8px var(--gutter);text-align:center;background:repeating-linear-gradient(-45deg,#3a0508,#3a0508 12px,#2a0306 12px 24px);flex-wrap:wrap;justify-content:center;gap:8px 16px;font-size:.85rem;display:flex}.preview-banner a{color:var(--white);font-weight:600}