@font-face{font-family:"Noto Sans Thai";font-style:normal;font-display:swap;font-weight:100 900;src:url("/assets/fonts/noto-sans-thai-thai-wght-normal.woff2") format("woff2-variations");unicode-range:U+02D7,U+0303,U+0331,U+0E01-0E5B,U+200C-200D,U+25CC}@font-face{font-family:"Noto Sans Thai";font-style:normal;font-display:swap;font-weight:100 900;src:url("/assets/fonts/noto-sans-thai-latin-ext-wght-normal.woff2") format("woff2-variations");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:"Noto Sans Thai";font-style:normal;font-display:swap;font-weight:100 900;src:url("/assets/fonts/noto-sans-thai-latin-wght-normal.woff2") format("woff2-variations");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
:root{color-scheme:light;--bg:#f6f8f7;--surface:#fff;--surface-2:#edf6f5;--text:#17313a;--muted:#61737a;--line:#d9e4e2;--primary:#087f8c;--primary-dark:#05616b;--accent:#ffb45b;--shadow:0 14px 38px rgba(18,66,72,.09);--radius:22px;--shell:1180px}
:root[data-theme=dark]{color-scheme:dark;--bg:#0b181c;--surface:#122329;--surface-2:#142c31;--text:#edf8f8;--muted:#a8bdc0;--line:#284148;--primary:#40c3c8;--primary-dark:#79dce0;--accent:#ffc16f;--shadow:0 18px 45px rgba(0,0,0,.25)}
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var(--line);backdrop-filter:blur(14px)}.header-inner{height:68px;display:flex;align-items:center;justify-content:space-between;gap:22px}.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-size:1.35rem;font-weight:850;letter-spacing:-.04em}.brand:hover{text-decoration:none}.brand>span:last-child>span{color:var(--primary)}.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:var(--primary);color:#fff;font-weight:900}.desktop-nav{display:flex;align-items:center;gap:28px;margin-left:auto}.desktop-nav a{color:var(--muted);font-size:.92rem;font-weight:650}.desktop-nav a:hover{color:var(--primary);text-decoration:none}.header-actions{display:flex;align-items:center;gap:10px}.theme-toggle,.mobile-menu summary{border:1px solid var(--line);background:var(--surface-2);color:var(--text);border-radius:11px;padding:8px 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0}.hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:70px;align-items:center}.hero-actions{display:flex;align-items:center;gap:22px;margin:28px 0}.button{display:inline-flex;justify-content:center;align-items:center;gap:7px;padding:12px 18px;border:0;border-radius:12px;background:var(--primary);color:#fff;font-weight:780;box-shadow:0 9px 24px color-mix(in srgb,var(--primary) 24%,transparent)}.button:hover{background:var(--primary-dark);color:#fff;text-decoration:none}.text-link{font-weight:750}.trust-row{display:flex;flex-wrap:wrap;gap:20px;padding:0;margin:28px 0 0;list-style:none;color:var(--muted);font-size:.9rem}.trust-row li:before{content:"✓";color:var(--primary);font-weight:900;margin-right:6px}.hero-demo{position:relative;padding:34px;background:var(--surface);border:1px solid var(--line);border-radius:30px;box-shadow:var(--shadow);transform:rotate(1deg)}.hero-demo:after{content:"";position:absolute;width:110px;height:110px;right:-25px;top:-30px;background:var(--accent);border-radius:50%;opacity:.16;z-index:-1}.hero-demo p{margin:18px 0 4px;font-size:1rem}.hero-demo strong{display:block;font-size:2.35rem;line-height:1.2;letter-spacing:-.04em}.hero-demo div{height:9px;background:var(--line);border-radius:20px;margin:24px 0 10px;overflow:hidden}.hero-demo div span{display:block;height:100%;background:var(--primary);border-radius:inherit}.hero-demo small{color:var(--muted)}.section{padding:72px 0}.section.soft{background:var(--surface-2)}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:28px}.section-heading h2,.split h2{margin:5px 0 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18px;color:var(--muted);font-size:.92rem}.card-link{margin-top:auto;color:var(--primary);font-weight:760}.split{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:start}.split>div>p{color:var(--muted);font-size:1.05rem}.principles{margin:0;padding:0;list-style:none}.principles li{display:flex;gap:18px;padding:20px 0;border-bottom:1px solid var(--line)}.principles>li>span{color:var(--primary);font-weight:850}.principles strong{font-size:1.05rem}.principles p{margin:3px 0 0;color:var(--muted)}.guide-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.guide-grid>a{padding:30px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);color:var(--text)}.guide-grid>a:hover{border-color:var(--primary);box-shadow:var(--shadow);text-decoration:none}.guide-grid span{color:var(--primary);font-size:.78rem;font-weight:850;text-transform:uppercase;letter-spacing:.1em}.guide-grid h2{margin:8px 0;font-size:1.35rem;line-height:1.35}.guide-grid p{color:var(--muted)}.guide-grid strong{color:var(--primary)}.breadcrumbs{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:18px;color:var(--muted);font-size:.83rem}.breadcrumbs a{color:var(--muted)}.content-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:30px;padding-top:38px;padding-bottom:72px}.content-main{min-width:0}.bluf{padding:20px 22px;margin-bottom:22px;background:color-mix(in srgb,var(--primary) 9%,var(--surface));border:1px solid color-mix(in srgb,var(--primary) 30%,var(--line));border-left:5px solid var(--primary);border-radius:15px}.bluf strong{color:var(--primary)}.bluf p{margin:4px 0 0}.bluf.inline{margin:0 0 28px}.tool-panel,.article-card,.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 5px 20px rgba(16,60,65,.04)}.tool-panel{padding:26px;margin-bottom:24px}.panel-heading{display:flex;gap:15px;align-items:center;padding-bottom:22px;margin-bottom:23px;border-bottom:1px solid var(--line)}.panel-heading h2{margin:0;font-size:1.3rem}.panel-heading p{margin:2px 0 0;color:var(--muted);font-size:.9rem}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px}.field{display:flex;flex-direction:column;gap:7px;font-size:.9rem;font-weight:700}.field small{color:var(--muted);font-weight:450;line-height:1.4}.input-wrap{display:flex;align-items:center;background:var(--bg);border:1px solid var(--line);border-radius:12px;overflow:hidden}.input-wrap:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in srgb,var(--primary) 14%,transparent)}.input-wrap input{min-width:0;width:100%;padding:12px 13px;border:0;outline:0;background:transparent;color:var(--text);font-weight:700}.input-wrap>span{padding:0 12px;color:var(--muted);font-size:.82rem;white-space:nowrap}.field select{width:100%;padding:12px 13px;border:1px solid var(--line);border-radius:12px;background:var(--bg);color:var(--text);outline:0}.check-field{display:flex;align-items:center;align-self:end;gap:9px;min-height:48px;padding:11px 13px;background:var(--bg);border:1px solid var(--line);border-radius:12px;font-weight:680}.check-field input{width:19px;height:19px;accent-color:var(--primary)}.result{margin-top:24px;padding:24px;background:var(--surface-2);border-radius:17px;border:1px solid var(--line)}.result-label{margin:0;color:var(--muted);font-size:.77rem;font-weight:800;text-transform:uppercase;letter-spacing:.08em}.result-main{margin:5px 0 18px;color:var(--primary);font-size:clamp(1.7rem,4vw,2.6rem);font-weight:900;line-height:1.2;letter-spacing:-.04em}.result-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.result-grid div{padding:12px;background:var(--surface);border:1px solid var(--line);border-radius:11px}.result-grid span{display:block;color:var(--muted);font-size:.76rem}.result-grid strong{display:block;margin-top:2px;font-size:1rem}.result-hint{margin:16px 0 0;color:var(--muted);font-size:.86rem}.result-hint.error{color:#ba3e47}.share-button{margin-top:14px;padding:8px 12px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--text);cursor:pointer;font-weight:680}.share-button:hover{border-color:var(--primary)}.article-card{padding:32px}.article-card h2{margin:32px 0 10px;font-size:1.45rem;line-height:1.3}.article-card h2:first-child{margin-top:0}.article-card p,.article-card li{color:var(--muted)}.article-card li+li{margin-top:7px}.formula{padding:16px 18px;background:var(--surface-2);border-radius:13px;color:var(--text)!important;font-weight:720}.faq-list details{border-top:1px solid var(--line)}.faq-list details:last-child{border-bottom:1px solid var(--line)}.faq-list summary{padding:16px 0;cursor:pointer;font-weight:760}.faq-list p{margin:-4px 0 16px}.sticky-stack{position:sticky;top:94px;display:flex;flex-direction:column;gap:18px}.side-card{padding:22px}.side-card h2{margin:4px 0 9px;font-size:1.1rem;line-height:1.4}.side-card p{color:var(--muted);font-size:.88rem}.side-card small{display:block;margin-top:12px;color:var(--muted);line-height:1.45}.side-link{display:block;padding:10px 0;border-bottom:1px solid var(--line);color:var(--text);font-size:.9rem}.side-link:last-child{border:0}.affiliate-card{background:linear-gradient(145deg,var(--surface),var(--surface-2))}.affiliate-card .button{width:100%}.ad-slot{display:grid;place-items:center;min-height:250px;padding:20px;background:var(--surface-2);border:1px dashed var(--line);border-radius:var(--radius);color:var(--muted);text-align:center}.ad-slot span{font-size:.68rem;text-transform:uppercase;letter-spacing:.12em}.ad-slot p{font-size:.85rem}.page-space{padding-top:38px;padding-bottom:72px}.guide-article>section:not(.bluf){padding-bottom:10px}.mini-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.mini-grid .tool-card{padding:20px}.mini-grid .tool-card p{display:none}.mini-grid .tool-card h2{font-size:1.05rem}.legal table{display:block;width:100%;overflow-x:auto;border-collapse:collapse}.legal th,.legal td{padding:12px;text-align:left;border:1px solid var(--line);min-width:160px;vertical-align:top}.legal th{background:var(--surface-2)}.notice{padding:17px 18px;margin-top:25px;background:var(--surface-2);border:1px solid var(--line);border-radius:13px}.notice p{margin:4px 0}.inline-button{margin:8px 0}.filter-row{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:24px}.filter-row button{padding:8px 13px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--muted);cursor:pointer}.filter-row button.active{background:var(--primary);border-color:var(--primary);color:#fff}.card-grid>div[hidden]{display:none}.site-footer{padding:50px 0 24px;background:var(--surface);border-top:1px solid var(--line)}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:35px}.footer-grid h2{margin:0 0 11px;font-size:.9rem}.footer-grid p{max-width:310px;color:var(--muted);font-size:.88rem}.footer-grid>div>a:not(.brand){display:block;margin:7px 0;color:var(--muted);font-size:.86rem}.brand-footer{margin-bottom:12px}.footer-bottom{display:flex;justify-content:space-between;gap:25px;padding-top:25px;margin-top:32px;border-top:1px solid var(--line);color:var(--muted);font-size:.77rem}.footer-bottom p{margin:0;max-width:720px}
@media(max-width:900px){.desktop-nav{display:none}.mobile-menu{display:block}.hero-grid,.split{grid-template-columns:1fr}.hero-grid{gap:45px}.hero-demo{max-width:620px}.card-grid{grid-template-columns:repeat(2,1fr)}.content-layout{grid-template-columns:1fr}.sticky-stack{position:static;display:grid;grid-template-columns:1fr 1fr}.ad-slot{display:none}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.shell{width:min(calc(100% - 24px),var(--shell))}.header-inner{height:62px}.brand{font-size:1.15rem}.brand-mark{width:32px;height:32px}.theme-toggle{width:38px;height:38px;padding:7px}.home-hero{padding:52px 0}.hero{padding:48px 0}.hero h1{font-size:2.45rem}.hero-actions{align-items:flex-start;flex-direction:column;gap:14px}.trust-row{gap:9px 15px}.section{padding:54px 0}.section-heading{align-items:start;flex-direction:column}.card-grid,.guide-grid,.form-grid,.result-grid,.mini-grid,.sticky-stack,.footer-grid{grid-template-columns:1fr}.tool-panel,.article-card{padding:20px}.content-layout{padding-top:24px}.footer-bottom{flex-direction:column}.hero-demo strong{font-size:1.85rem}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.deep-guide{padding:38px}.on-page{display:flex;flex-wrap:wrap;gap:8px;padding:18px;margin-bottom:30px;background:var(--surface-2);border:1px solid var(--line);border-radius:15px}.on-page strong{flex-basis:100%;font-size:.9rem}.on-page a{padding:6px 10px;background:var(--surface);border:1px solid var(--line);border-radius:999px;font-size:.82rem;font-weight:700}.article-section{scroll-margin-top:90px;padding:8px 0 24px;border-bottom:1px solid var(--line)}.article-section:last-of-type{border-bottom:0}.article-section h2{font-size:1.65rem}.article-section h3{margin:25px 0 8px;font-size:1.15rem}.guide-visual{margin:24px 0 6px}.guide-visual img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:18px;background:var(--surface-2)}.guide-visual figcaption{padding:8px 3px;color:var(--muted);font-size:.8rem}.example-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.example-card{padding:17px;background:var(--surface-2);border:1px solid var(--line);border-radius:14px}.example-card>span{color:var(--primary);font-size:.7rem;font-weight:850;letter-spacing:.08em;text-transform:uppercase}.example-card h3{margin:4px 0 12px;font-size:1rem}.example-card dl{margin:0}.example-card dl div{padding:8px 0;border-top:1px solid var(--line)}.example-card dt{color:var(--muted);font-size:.72rem}.example-card dd{margin:0;color:var(--text);font-weight:720}.example-card p{margin:10px 0 0;font-size:.82rem;line-height:1.55}.table-scroll{width:100%;overflow-x:auto;border:1px solid var(--line);border-radius:14px}.reference-table{width:100%;border-collapse:collapse;white-space:normal}.reference-table th,.reference-table td{min-width:120px;padding:12px 13px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.reference-table thead th{background:var(--primary);color:#fff;font-size:.84rem}.reference-table tbody th{background:var(--surface-2);color:var(--text);font-weight:760}.reference-table tr:last-child th,.reference-table tr:last-child td{border-bottom:0}.reference-table th:last-child,.reference-table td:last-child{border-right:0}.table-note{margin:9px 0 0;font-size:.8rem}.check-list,.mistake-list{padding-left:0;list-style:none}.check-list li,.mistake-list li{position:relative;padding-left:29px}.check-list li:before,.mistake-list li:before{position:absolute;left:0;top:0;font-weight:900}.check-list li:before{content:"✓";color:var(--primary)}.mistake-list li:before{content:"!";display:grid;place-items:center;width:19px;height:19px;margin-top:4px;border-radius:50%;background:#fff1e2;color:#9b5718;font-size:.72rem}.numbered-steps{counter-reset:steps;padding:0;list-style:none}.numbered-steps li{position:relative;min-height:42px;padding:7px 0 7px 48px;counter-increment:steps}.numbered-steps li:before{content:counter(steps);position:absolute;left:0;top:2px;display:grid;place-items:center;width:34px;height:34px;border-radius:11px;background:var(--primary);color:#fff;font-weight:850}.caution-section{margin-top:16px;padding:22px!important;background:color-mix(in srgb,var(--accent) 12%,var(--surface));border:1px solid color-mix(in srgb,var(--accent) 48%,var(--line))!important;border-radius:15px}.caution-section h2{margin-top:0}.next-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.next-grid a{display:flex;gap:12px;align-items:flex-start;padding:14px;border:1px solid var(--line);border-radius:13px;color:var(--text)}.next-grid a:hover{border-color:var(--primary);text-decoration:none}.next-grid>a>span{display:grid;place-items:center;flex:0 0 auto;width:28px;height:28px;border-radius:9px;background:var(--surface-2);color:var(--primary);font-weight:850}.next-grid strong,.next-grid small{display:block}.next-grid small{margin-top:3px;color:var(--muted);font-size:.75rem;line-height:1.45}.review-note{margin:28px 0 0;padding-top:18px;border-top:1px solid var(--line);font-size:.78rem}
@media(max-width:700px){.example-grid,.next-grid{grid-template-columns:1fr}.deep-guide{padding:24px}.article-section h2{font-size:1.38rem}}
@media(max-width:620px){.deep-guide{padding:20px}.on-page{padding:14px}.on-page a{font-size:.76rem}.guide-visual{margin-inline:-8px}}