:root{--navy:#071a3e;--ink:#182941;--muted:#6d7d96;--line:#e0e8f4;--blue:#1b67db;--cyan:#12c3e1;--soft:#eff5fd;--shadow:0 16px 45px rgba(12,38,82,.08),0 2px 8px rgba(11,37,75,.05)}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:radial-gradient(ellipse at top,#dceeff 0%,#f5f8fd 32%,#f7f9fc 80%);color:var(--ink);font-family:system-ui,-apple-system,"Noto Sans Thai",Tahoma,sans-serif;line-height:1.65}
button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}a{text-decoration:none}
button:focus-visible,a:focus-visible{outline:3px solid #42a5ff;outline-offset:3px}
.shell{max-width:580px;margin:0 auto;min-height:100dvh;padding:calc(18px + env(safe-area-inset-top)) 16px calc(22px + env(safe-area-inset-bottom))}
.site-header{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:0 0 20px;padding:0 3px}
.brand{display:flex;align-items:center;gap:10px;min-width:0}.brand-icon{height:45px;width:45px;object-fit:cover;border-radius:14px;box-shadow:0 5px 11px rgba(7,26,62,.18)}
.brand-words{min-width:0}.brand-words strong{display:block;font-size:15px;line-height:1.4;font-weight:850;white-space:nowrap}.brand-words span{font-size:10px;letter-spacing:.2px;color:#6f839d;display:block;white-space:nowrap}
.staging-label{font-size:9px;font-weight:850;letter-spacing:1px;padding:5px 9px;border-radius:30px;background:#e5f3ff;color:#205c9e;border:1px solid #d4e7f9;white-space:nowrap}
.hero-card{position:relative;isolation:isolate;overflow:hidden;border-radius:31px;background:linear-gradient(153deg,#082e75 0%,#0a2357 41%,#061739 100%);box-shadow:0 22px 38px rgba(0,32,98,.18),inset 0 1px 0 rgba(255,255,255,.23);padding:32px 25px 28px;text-align:center;color:#fff}
.hero-card:before{content:"";position:absolute;inset:1px;border-radius:30px;border:1px solid rgba(255,255,255,.13);pointer-events:none}
.hero-glow{position:absolute;width:330px;height:300px;right:-110px;top:-100px;border-radius:50%;background:radial-gradient(circle,rgba(24,185,248,.3),transparent 68%);z-index:-1}
.hero-mark{display:grid;place-items:center;margin:4px auto 14px;width:122px;height:122px;border-radius:31px;background:rgba(255,255,255,.1);padding:5px;border:1px solid rgba(255,255,255,.2);box-shadow:0 15px 40px rgba(0,4,30,.35),inset 0 1px 0 rgba(255,255,255,.22)}
.hero-mark img{width:112px;height:112px;object-fit:cover;border-radius:25px}
.eyebrow{color:#9edafb;font-size:10px;letter-spacing:2px;font-weight:800;margin:0 0 6px}.hero-card h1{font-size:clamp(27px,7.5vw,39px);line-height:1.3;letter-spacing:-.8px;margin:0;font-weight:900}.hero-card h1 span{color:#a5eeff}
.hero-description{font-size:14px;line-height:1.75;color:#cde5ff;margin:12px auto 15px;max-width:350px}.schools{display:flex;flex-wrap:wrap;justify-content:center;gap:9px;margin-bottom:24px}.schools>span{background:rgba(255,255,255,.08);border:1px solid rgba(210,234,255,.18);border-radius:30px;padding:5px 10px;font-size:11px;color:#eaf6ff;font-weight:700}.school-dot{width:6px;height:6px;display:inline-block;background:#32d8dc;border-radius:50%;margin-right:5px;box-shadow:0 0 7px #3ed7ff}
.open-btn{display:flex;align-items:center;justify-content:center;gap:11px;background:linear-gradient(120deg,#e8faff,#fff);color:#073168;border-radius:17px;box-shadow:0 11px 26px rgba(0,0,0,.16),inset 0 1px 0 #fff;min-height:61px;padding:13px 13px;font-size:15px;font-weight:900;text-align:center;transition:transform .15s,box-shadow .15s}.open-btn:active{transform:translateY(2px);box-shadow:0 3px 7px rgba(0,0,0,.12)}.open-btn-icon{display:grid;place-items:center;background:#d2f3ff;color:#09599c;width:28px;height:28px;border-radius:10px;font-size:20px}.open-chevron{font-size:30px;line-height:1;margin-left:auto;color:#638cad}.launch-note{font-size:11px;color:#b3d0ef;line-height:1.6;margin:13px 2px 0}
.action-card,.guide-card{border:1px solid var(--line);border-radius:23px;background:#fff;box-shadow:var(--shadow);padding:21px 20px;margin-top:17px}.section-top{display:flex;align-items:center;gap:13px}.section-symbol{background:linear-gradient(145deg,#e5f3ff,#d7edff);color:#136cc2;width:45px;height:45px;border-radius:15px;display:grid;place-items:center;font-size:25px;font-weight:800}.section-kicker{font-size:11px;letter-spacing:.9px;color:#1a78d4;font-weight:800;margin:0}.action-card h2,.guide-card h2,.notice-card h2{font-size:17px;margin:0;font-weight:850;line-height:1.5}.section-desc{font-size:13px;color:#5b718c;margin:13px 0 16px}.install-btn{min-height:49px;border:0;width:100%;border-radius:13px;color:#fff;background:linear-gradient(120deg,#1762d0,#098dd9);font-weight:850;box-shadow:0 10px 18px rgba(24,105,208,.19)}.install-btn:active{transform:translateY(1px)}.helper{font-size:11px;color:#8190a8;margin:10px 0 0;text-align:center}
.guide-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:13px}.mini-label{font-size:10px;color:#647b98;background:#eaf2fb;border-radius:20px;padding:3px 10px;font-weight:750}.platform-tabs{display:grid;grid-template-columns:1fr 1fr;gap:5px;padding:5px;background:#edf3fb;border-radius:14px}.platform-tab{border:0;border-radius:10px;background:transparent;padding:10px 6px;color:#66809f;font-size:13px;font-weight:750}.platform-tab.selected{background:#fff;color:#1a5ea9;box-shadow:0 3px 11px rgba(34,82,142,.09)}.guide-panel{padding:14px 1px 0}.guide-panel.hidden{display:none}.guide-panel ol{list-style:none;counter-reset:install;display:grid;gap:13px;padding:0;margin:0}.guide-panel li{position:relative;padding-left:38px;font-size:13px;color:#435a77;min-height:29px}.guide-panel li::before{counter-increment:install;content:counter(install);position:absolute;left:1px;top:0;background:#eaf4ff;color:#185ca9;height:27px;width:27px;line-height:27px;text-align:center;border-radius:9px;font-size:12px;font-weight:850}.guide-panel strong{color:#1d3760}.inline-note{font-size:11px;line-height:1.7;margin:15px 0 0;padding:11px 12px;border-radius:10px;background:#f0f6fd;color:#677d9a}
.notice-card{display:flex;gap:12px;margin:17px 0 0;border-radius:17px;border:1px solid #d6e7f7;background:#edf5ff;padding:15px}.notice-emblem{flex:0 0 25px;width:25px;height:25px;line-height:25px;text-align:center;border-radius:8px;background:#cae6ff;color:#1765af;font-weight:900;font-family:Georgia,serif}.notice-card h2{font-size:13px;color:#174977}.notice-card p{font-size:11px;color:#587392;line-height:1.75;margin:8px 0 0}
.secondary-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:18px}.secondary-btn{background:#fff;color:#385d88;border:1px solid #dbe7f3;border-radius:13px;min-height:48px;padding:9px 12px;box-shadow:0 3px 12px rgba(12,38,82,.035);font-size:12px;font-weight:800}.secondary-btn span{font-size:17px;margin-right:4px}
footer{text-align:center;padding:29px 5px 0;display:flex;flex-direction:column;gap:1px;font-size:12px;font-weight:750;color:#8193a8}.footer-footnote{font-size:9px;letter-spacing:1.4px;color:#a9b7c7;margin-top:7px}
.toast{position:fixed;bottom:calc(24px + env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);width:max-content;max-width:calc(100vw - 38px);padding:11px 18px;border-radius:13px;background:#113b63;color:white;box-shadow:0 15px 36px rgba(13,33,66,.3);z-index:60;font-size:13px;font-weight:700}.offline-banner{position:fixed;top:0;left:0;right:0;background:#fff5e5;border-bottom:1px solid #f0d4aa;color:#915310;padding:calc(9px + env(safe-area-inset-top)) 12px 9px;text-align:center;z-index:70;font-size:12px;font-weight:750}
[hidden]{display:none!important}
@media(min-width:680px){.shell{padding:30px 18px 38px}.hero-card{padding:38px 42px 32px}.action-card,.guide-card{padding:25px 28px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}