.tet-landing{--tet-red:#c8102e;--tet-red-deep:#9d0a22;--gold:#e8b53a;--gold-pale:#ffe6a6;--gold-deep:#b9871f;--mai:#f4c542;--peach:#f0a6a6;--ink:#1e2a3a;--ink-2:#142031;--plum:#8762df;--plum-deep:#6f4e8f;--plum-ink:#4b2a75;--mint:#ecfaf8;--surface:#f8fdfc;--teal-dark:#1c9189;--teal-ink:#15706a;--gold-ink:#6d4f12;--brand-ink:#24323f;--text-mid:#505c68;--card:#fff;--border:#e8d9d3;--panel-a:.94;--panel-top:rgba(calc(247 + 8*var(--warmth)), calc(230 + 17*var(--warmth)), calc(219 + 20*var(--warmth)), var(--panel-a));--panel-bot:rgba(calc(253 + 2*var(--warmth)), calc(244 + 7*var(--warmth)), calc(236 + 10*var(--warmth)), var(--panel-a));--panel:linear-gradient(180deg, var(--panel-top) 0%, var(--panel-bot) 78%);--panel-soft:var(--panel);--panel-edge:#78465a2e;--edge-gold:#e8b53a57;--panel-fallback:#fcf0e8f0;--section-pad:clamp(72px,11vh,128px);--dao-pink:#f7b3cd;--dao-deep:#b9466f;--paper:#fffaf4;--max:1140px;--font-h:"Playfair Display",Georgia,serif;--font-b:"Inter",ui-sans-serif,system-ui,sans-serif;--r-sm:12px;--r-md:18px;--r-lg:24px;--r-xl:30px;--r-pill:999px;--ease:cubic-bezier(.22,1,.36,1);--dur:.7s;--micro:.18s;--shadow-md:0 14px 40px #140e2824;--shadow-lg:0 28px 70px #140e2838;--warmth:1;--brand-teal:#65c8c1;--brand-teal-dark:#1c9189;--brand-teal-bright:#20b8aa;--brand-mint:#ecfaf8;--brand-gold:#f2c14e;--brand-orange:#f28c28;--brand-orange-deep:#e5831f;--radius-pill:999px;--radius-md:18px;--radius-sm:12px;--dur-micro:.18s;--ease-out-soft:cubic-bezier(.22,1,.36,1);--max-w-site:1180px;--text-xs:.78rem;--text-sm:.9rem;--text-lg:1.25rem;--font-body-stack:"Inter",ui-sans-serif,system-ui,-apple-system,sans-serif;--font-heading-stack:"Playfair Display",Georgia,serif}.tet-landing *{box-sizing:border-box;margin:0}.tet-landing{scroll-behavior:smooth;font-family:var(--font-b);color:var(--brand-ink);background:#fbf3e9;line-height:1.55;position:relative;overflow-x:hidden}.tet-landing img{max-width:100%;display:block}.tet-landing h1,.tet-landing h2,.tet-landing h3,.tet-landing .disp{font-family:var(--font-h)}.tet-landing a{color:var(--teal-ink)}.tet-landing :focus-visible{outline:3px solid var(--plum);outline-offset:3px;border-radius:6px}.tet-landing .sr-only{clip:rect(0,0,0,0);border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.tet-landing #sky{z-index:0;pointer-events:none;background:linear-gradient(#fbf3e9 0%,#fdeede 12%,#fbeaef 24%,#f6f0e1 36%,#fdeede 48%,#fbe9ef 60%,#f7f1e6 72%,#fceee2 84%,#fbf3e9 96% 100%);height:100%;min-height:100%;position:absolute;top:0;left:0;right:0}.tet-landing #blossoms{z-index:0;pointer-events:none;position:fixed;inset:0;overflow:hidden}.tet-landing .petal{will-change:transform;animation:linear infinite pfall;position:absolute}.tet-landing .petal i{width:var(--ps,13px);height:calc(var(--ps,13px) * 1.16);background:radial-gradient(130% 120% at 30% 18%, #fff 0 7%, var(--pc,#f7b3cd) 44%, var(--pc2,#ec84ad) 100%);clip-path:polygon(50% 13%,41% 2%,28% 6%,19% 21%,21% 43%,33% 66%,50% 100%,67% 66%,79% 43%,81% 21%,72% 6%,59% 2%);animation:ease-in-out infinite alternate psway;display:block;box-shadow:inset 0 -2px 3px #ce568261}@keyframes pfall{0%{transform:translateY(-12vh)}to{transform:translateY(114vh)}}@keyframes pfallDrift{0%{transform:translateY(-12vh)}to{transform:translate(var(--dx,0px),114vh)}}@keyframes psway{0%{transform:translate(-14px)rotate(-38deg)}to{transform:translate(16px)rotate(58deg)}}.tet-landing #branches{z-index:1;pointer-events:none;position:fixed;inset:0;overflow:hidden}.tet-landing .branch{pointer-events:none;filter:drop-shadow(0 12px 20px #4a1a2e33);width:clamp(118px,15.5vw,230px);height:min(104vh,1060px);position:absolute;top:-8px}.tet-landing .branch-left{left:-10px}.tet-landing .branch-right{opacity:.94;height:min(86vh,880px);right:-10px}.tet-landing .branch .sway{will-change:transform;animation:9s ease-in-out infinite alternate branchSway}.tet-landing .branch-left .sway{transform-origin:6px 0}.tet-landing .branch-right .sway{transform-origin:234px 0;animation-duration:10.4s;animation-delay:-2.4s}.tet-landing .branch.shaking .sway{animation:1.05s cubic-bezier(.26,.86,.4,1) both branchShake}@keyframes branchSway{0%{transform:rotate(-.85deg)}to{transform:rotate(.9deg)}}@keyframes branchShake{0%{transform:rotate(0)}12%{transform:rotate(2.8deg)}27%{transform:rotate(-2.1deg)}43%{transform:rotate(1.6deg)}60%{transform:rotate(-1.05deg)}78%{transform:rotate(.55deg)}to{transform:rotate(0)}}.tet-landing .bloomf{transform-box:fill-box;transform-origin:50%;animation:6.5s ease-in-out infinite alternate bloomBreathe}@keyframes bloomBreathe{0%{transform:scale(.965)}to{transform:scale(1.04)}}.tet-landing .branch-shake{cursor:pointer;pointer-events:auto;z-index:2;-webkit-tap-highlight-color:transparent;height:min(62vh,620px);width:clamp(0px, calc((100vw - var(--max)) / 2 - 8px), 178px);background:0 0;border:0;margin:0;padding:0;position:fixed;top:74px}.tet-landing .branch-shake-left{left:0}.tet-landing .branch-shake-right{right:0}.tet-landing .branch-shake:after{content:"";background:radial-gradient(circle at 38% 34%,#fff,var(--gold) 64%,#cf9620);opacity:0;width:9px;height:9px;transition:opacity .4s var(--ease);border-radius:50%;animation:2.6s ease-in-out infinite hintPulse;position:absolute;top:18px;box-shadow:0 0 0 5px #e8b53a29,0 0 14px 3px #e8b53a6b}.tet-landing .branch-shake-left:after{right:14px}.tet-landing .branch-shake-right:after{left:14px}.tet-landing .branch-shake:hover:after,.tet-landing .branch-shake:focus-visible:after{opacity:1}@keyframes hintPulse{0%,to{transform:scale(.9)}50%{transform:scale(1.18)}}.tet-landing .branch-shake:focus-visible{outline:3px solid var(--plum);outline-offset:-8px;border-radius:20px}@media (max-width:1100px){.tet-landing .branch-shake{display:none}.tet-landing .branch{opacity:.66;width:clamp(94px,17vw,150px)}.tet-landing .branch-right{opacity:.6}}@media (max-width:560px){.tet-landing .branch-right{display:none}.tet-landing .branch-left{opacity:.5;width:108px}}.tet-landing .site-header{z-index:80;transition:box-shadow var(--dur-micro) ease;background:#fff;position:sticky;top:0;box-shadow:0 1px #14464b0f}.tet-landing .site-header.is-scrolled{box-shadow:0 6px 24px #14464b1f}.tet-landing .promo-bar{text-align:center;color:#fff;letter-spacing:.02em;transition:background var(--dur-micro) ease;background:#147d72;padding:11px 16px;font-weight:700;text-decoration:none;display:block}.tet-landing .promo-bar:hover{background:#116a61}.tet-landing .site-header-inner{max-width:var(--max-w-site);transition:padding var(--dur-micro) ease;justify-content:space-between;align-items:center;gap:24px;margin:0 auto;padding:13px 18px;display:flex}.tet-landing .site-header.is-scrolled .site-header-inner{padding-top:8px;padding-bottom:8px}.tet-landing .site-logo{flex:none;align-items:center;text-decoration:none;display:flex}.tet-landing .site-logo img{width:148px;height:auto;transition:width var(--dur-micro) ease;display:block}.tet-landing .site-header.is-scrolled .site-logo img{width:124px}.tet-landing .site-nav{justify-content:flex-end;align-items:center;gap:6px;font-size:14px;font-weight:600;display:flex}.tet-landing .site-nav a,.tet-landing .nav-dropdown-trigger{color:#21313d;border-radius:var(--radius-pill);transition:background var(--dur-micro) ease,color var(--dur-micro) ease;padding:10px 13px;text-decoration:none}.tet-landing .site-nav a:hover,.tet-landing .nav-dropdown-trigger:hover{background:var(--brand-mint);color:#15706a}.tet-landing .site-nav a.is-active,.tet-landing .nav-dropdown-trigger.is-active{background:var(--brand-mint);color:#15706a;font-weight:700}.tet-landing .site-nav .nav-cta{background:var(--brand-orange);color:var(--brand-ink);transition:background var(--dur-micro) ease,transform var(--dur-micro) var(--ease-out-soft),box-shadow var(--dur-micro) var(--ease-out-soft);padding:10px 18px;font-weight:700;box-shadow:0 8px 18px #f28c2838}.tet-landing .site-nav .nav-cta:hover{background:var(--brand-orange-deep);color:var(--brand-ink);transform:translateY(-1px);box-shadow:0 12px 26px #f28c2852}.tet-landing .site-nav .nav-cta:active{transform:translateY(0)}.tet-landing .nav-dropdown{position:relative}.tet-landing .nav-dropdown-trigger{font:inherit;cursor:pointer;background:0 0;border:0;align-items:center;gap:6px;font-weight:600;display:inline-flex}.tet-landing .nav-dropdown-trigger .nav-caret{transition:transform var(--dur-micro) var(--ease-out-soft)}.tet-landing .nav-dropdown.is-open .nav-dropdown-trigger .nav-caret{transform:rotate(180deg)}.tet-landing .nav-dropdown-panel{border-radius:var(--radius-md);opacity:0;visibility:hidden;min-width:200px;transition:opacity var(--dur-micro) ease,transform var(--dur-micro) var(--ease-out-soft),visibility 0s linear var(--dur-micro);z-index:5;background:#fff;border:1px solid #d8ebe8;gap:2px;padding:8px;display:grid;position:absolute;top:calc(100% + 8px);left:50%;transform:translate(-50%,-6px);box-shadow:0 18px 44px #14464b26}.tet-landing .nav-dropdown.is-open .nav-dropdown-panel{opacity:1;visibility:visible;transition-delay:0s;transform:translate(-50%)}.tet-landing .nav-dropdown-panel a{border-radius:var(--radius-sm);white-space:nowrap;padding:10px 14px;display:block}.tet-landing .nav-toggle{border-radius:var(--radius-sm);cursor:pointer;background:#fff;border:1px solid #d8ebe8;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;padding:10px;display:none}.tet-landing .nav-toggle span{background:var(--brand-ink);height:2px;transition:transform var(--dur-micro) var(--ease-out-soft),opacity var(--dur-micro) ease;border-radius:2px;display:block}.tet-landing .nav-toggle[aria-expanded=true] span:first-child{transform:translateY(7px)rotate(45deg)}.tet-landing .nav-toggle[aria-expanded=true] span:nth-child(2){opacity:0}.tet-landing .nav-toggle[aria-expanded=true] span:nth-child(3){transform:translateY(-7px)rotate(-45deg)}.tet-landing .header-mobile-actions{align-items:center;gap:10px;display:none}.tet-landing .header-mobile-actions .cart-link{color:#21313d;border-radius:var(--radius-pill);padding:8px 10px;font-weight:700;text-decoration:none}.tet-landing .drawer-backdrop{z-index:90;opacity:0;visibility:hidden;cursor:pointer;background:#1f303873;border:0;padding:0;transition:opacity .24s,visibility 0s linear .24s;position:fixed;inset:0}.tet-landing .drawer-backdrop.is-open{opacity:1;visibility:visible;transition-delay:0s}.tet-landing .mobile-drawer{z-index:91;visibility:hidden;width:min(330px,86vw);transition:transform .3s var(--ease-out-soft),visibility 0s linear .3s;background:#fff;flex-direction:column;gap:4px;padding:22px 20px 28px;display:flex;position:fixed;top:0;bottom:0;right:0;overflow-y:auto;transform:translate(102%);box-shadow:-18px 0 44px #14464b2e}.tet-landing .mobile-drawer.is-open{visibility:visible;transition-delay:0s;transform:translate(0)}.tet-landing .mobile-drawer-head{justify-content:space-between;align-items:center;margin-bottom:14px;display:flex}.tet-landing .mobile-drawer-head img{width:104px;height:auto;display:block}.tet-landing .mobile-drawer a{color:#21313d;border-radius:var(--radius-sm);opacity:0;transition:opacity .32s var(--ease-out-soft),transform .32s var(--ease-out-soft),background var(--dur-micro) ease,color var(--dur-micro) ease;padding:13px 14px;font-size:1.05rem;font-weight:600;text-decoration:none;transition-delay:0s;transform:translate(14px)}.tet-landing .mobile-drawer.is-open a{opacity:1;transition-delay:calc(40ms * var(--i,0)),calc(40ms * var(--i,0)),0s,0s;transform:translate(0)}.tet-landing .mobile-drawer a:hover{background:var(--brand-mint);color:#15706a}.tet-landing .mobile-drawer a.is-active{background:var(--brand-mint);color:#15706a;font-weight:700}.tet-landing .mobile-drawer .drawer-group-label{font-size:var(--text-xs);letter-spacing:.08em;text-transform:uppercase;color:var(--text-mid);margin:14px 0 2px;font-weight:700}.tet-landing .mobile-drawer .nav-cta{background:var(--brand-orange);color:var(--brand-ink);text-align:center;border-radius:var(--radius-pill);margin-top:16px;padding:14px;font-weight:700;box-shadow:0 8px 18px #f28c2838}.tet-landing .mobile-drawer .nav-cta:hover{background:var(--brand-orange-deep);color:var(--brand-ink)}@media (max-width:1100px){.tet-landing .site-nav{display:none}.tet-landing .header-mobile-actions,.tet-landing .nav-toggle{display:flex}}.tet-landing .page{z-index:1;position:relative}.tet-landing .wrap{max-width:var(--max);margin:0 auto;padding:0 clamp(16px,4vw,28px)}.tet-landing .wrap.surface{padding-inline:clamp(22px,3.2vw,44px)}.tet-landing section{position:relative}.tet-landing .band{z-index:1;position:relative}.tet-landing .surface{margin-block:clamp(10px,1.6vh,20px);position:relative}.tet-landing .surface+.surface{margin-block-start:clamp(10px,1.6vh,20px)}@media (max-width:640px){.tet-landing .surface{margin-block:10px}}.tet-landing .surface .reveal{transition-delay:60ms}.tet-landing .surface .h-sec.reveal,.tet-landing .surface .lead.reveal{transition-delay:.12s}.tet-landing .surface p.body.reveal,.tet-landing .surface .teacher-quote.reveal{transition-delay:.18s}.tet-landing .eyebrow{letter-spacing:.2em;text-transform:uppercase;color:var(--teal-ink);align-items:center;gap:9px;font-size:.74rem;font-weight:800;display:inline-flex}.tet-landing .eyebrow .rule{background:linear-gradient(90deg,var(--gold),transparent);border-radius:2px;width:30px;height:2px}.tet-landing .h-sec{color:var(--brand-ink);margin:12px 0 0;font-size:clamp(1.7rem,4vw,2.7rem);font-weight:800;line-height:1.12}.tet-landing .lead{max-width:60ch;color:var(--text-mid);margin-top:14px;font-size:1.05rem}.tet-landing .center{text-align:center;margin:0 auto}.tet-landing .btn{border-radius:var(--r-pill);transition:transform var(--micro) var(--ease),box-shadow var(--micro) var(--ease),background var(--micro);justify-content:center;align-items:center;gap:10px;padding:15px 28px;font-size:1rem;font-weight:800;text-decoration:none;display:inline-flex}.tet-landing .btn-buy{color:#fff;background:#835ddd;box-shadow:0 12px 30px #7350c466,inset 0 1px #ffffff38}.tet-landing .btn-buy:hover{background:linear-gradient(#7350c4,#5f3bb8);transform:translateY(-3px);box-shadow:0 18px 44px #7350c485,inset 0 1px #ffffff38}.tet-landing .btn-buy-secondary{color:var(--plum-ink);box-shadow:inset 0 0 0 2px var(--plum),0 10px 24px #7350c42e;background:#fff}.tet-landing .btn-buy-secondary:hover{color:var(--plum-deep);box-shadow:inset 0 0 0 2px var(--plum-deep),0 16px 32px #7350c442;background:#faf7ff;transform:translateY(-3px)}.tet-landing .hero-retailers{flex-wrap:wrap;gap:12px;display:flex}.tet-landing .peek-link{color:var(--teal-ink);border-bottom:1px solid #15706a66;margin-top:15px;font-weight:700;text-decoration:none;display:inline-block}.tet-landing .peek-link:hover{color:var(--teal-dark)}.tet-landing .maker-line{color:var(--text-mid);margin-top:16px;font-size:.92rem;font-weight:600}.tet-landing .maker-line b{color:var(--gold-ink);font-weight:800}.tet-landing .feature-showcase{padding-block:var(--section-pad)}.tet-landing .feature-grid{grid-template-columns:repeat(3,1fr);gap:16px;margin-top:36px;display:grid}.tet-landing .feature-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r-lg);transition:transform var(--micro) var(--ease),box-shadow var(--micro) var(--ease);padding:24px;box-shadow:0 10px 26px #140e2812}.tet-landing .feature-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px #140e281f}.tet-landing .feature-icon{background:#fbf6ec;border-radius:16px;width:62px;height:62px;display:block;overflow:hidden;box-shadow:0 5px 16px #78501e1f,inset 0 0 0 1px #78501e0f}.tet-landing .feature-icon img{object-fit:cover;width:100%;height:100%;display:block}.tet-landing .feature-card h3{font-family:var(--font-h);color:var(--brand-ink);margin-top:14px;font-size:1.14rem;font-weight:800;line-height:1.2}.tet-landing .feature-card p{color:var(--text-mid);margin-top:8px;font-size:.96rem;line-height:1.55}.tet-landing .feature-card .vi{color:var(--tet-red);font-weight:700}@media (max-width:900px){.tet-landing .feature-grid{grid-template-columns:1fr 1fr}}@media (max-width:560px){.tet-landing .feature-grid{grid-template-columns:1fr}}.tet-landing .buybar-actions{flex:none;grid-template-columns:1fr 1fr;gap:8px;min-width:172px;display:grid}.tet-landing .buybar .buybar-actions .btn{white-space:nowrap;min-height:44px;padding:10px;font-size:.84rem}.tet-landing .btn-ghost{color:#fff;background:#ffffff0f;border:1.6px solid #ffffff8c}.tet-landing .btn-ghost:hover{background:#ffffff24;transform:translateY(-3px)}.tet-landing .btn-ghost.dark{color:var(--plum-deep);background:0 0;border-color:#6f4e8f66}.tet-landing .btn-ghost.dark:hover{background:#8762df14}.tet-landing .price-note{color:var(--text-mid);margin-top:10px;font-size:.82rem}.tet-landing .hero .price-note{color:var(--text-mid)}.tet-landing .hero{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:100svh;padding:84px 0 48px;display:flex;position:relative}.tet-landing .hero:before,.tet-landing .hero:after{display:none}.tet-landing .kicker{font-family:var(--font-h);background:linear-gradient(110deg,#b07016,#8a4e14 55%,#73400f);-webkit-text-fill-color:transparent;letter-spacing:.02em;-webkit-background-clip:text;background-clip:text;margin-bottom:12px;font-size:clamp(1rem,2.4vw,1.35rem);font-style:italic;font-weight:600}.tet-landing .hero h1{letter-spacing:-.01em;color:var(--brand-ink);text-shadow:none;flex-direction:column;align-items:center;gap:.04em;margin:0;font-size:clamp(2.15rem,4.9vw,3.95rem);font-weight:800;line-height:1.16;display:flex}.tet-landing .hero h1 .en,.tet-landing .hero h1 .vi{background:linear-gradient(110deg,#c8102e 16%,#9a0a22 52%,#b06a16 92%) 0 0/220%;-webkit-text-fill-color:transparent;background-position:0;-webkit-background-clip:text;background-clip:text}.tet-landing .hero .sub{max-width:46ch;color:var(--text-mid);margin:20px auto 0;font-size:clamp(1rem,2.2vw,1.22rem);line-height:1.5}.tet-landing .hero-art{background:#fffaf2;border:1px solid #24323f24;border-radius:16px;width:min(700px,94%);margin:28px auto 4px;padding:10px;box-shadow:0 22px 54px #24323f29}.tet-landing .hero-art img{border-radius:9px;width:100%;height:auto;display:block}.tet-landing .hero-grid{text-align:center;grid-template-columns:1fr;place-items:center;gap:clamp(16px,2.4vh,26px);width:100%;max-width:640px;margin:0 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