:root{
  --story-blue:#2f72c4;
  --story-blue-soft:#eaf3ff;
  --story-green:#3c8d63;
  --story-green-soft:#edf8f1;
  --story-orange:#c9792d;
  --story-orange-soft:#fff4e8;
  --story-purple:#7557a8;
  --story-purple-soft:#f3eefb;
  --story-paper:#fffdf8;
  --story-warm:#f5efe4;
  --story-night:#17232d;
  --story-night-2:#223743;
}
body.teaching-page{background:#fbfbfa;color:#192321}
.skip-link{position:fixed;left:16px;top:-70px;z-index:100;background:#fff;color:#111;padding:10px 14px;border-radius:10px;box-shadow:var(--shadow);transition:top .2s}.skip-link:focus{top:16px}
.teaching-topbar{background:rgba(251,251,250,.92)}
.teaching-nav{position:relative}
.teaching-nav-links{display:flex;align-items:center;gap:4px;flex-wrap:wrap;justify-content:flex-end}
.teaching-nav-links a{padding:9px 11px;border-radius:10px;text-decoration:none;color:var(--muted);font-size:14px;font-weight:800;transition:.18s}
.teaching-nav-links a:hover,.teaching-nav-links a:focus-visible{background:#fff;color:var(--story-blue)}
.teaching-nav-links .nav-app-link{background:var(--story-blue);color:#fff}.teaching-nav-links .nav-app-link:hover{background:#235d9f;color:#fff}
.teaching-nav-controls{display:flex;align-items:center;gap:10px;flex:0 0 auto}.teaching-nav-controls .lang{min-width:118px}
.nav-toggle{display:none;border:1px solid var(--line);border-radius:12px;background:#fff;padding:9px 12px;font-weight:800;color:var(--ink)}
.teaching-hero{padding:58px 0 76px;background:radial-gradient(circle at 18% 6%,#fff7dc 0,rgba(255,247,220,0) 37%),linear-gradient(180deg,#fffdf8,#fbfbfa)}
.teaching-hero-grid{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);align-items:center;gap:54px}
.hero-copy h1{font-size:clamp(45px,6vw,76px);letter-spacing:-.045em;line-height:1.05;margin:18px 0 12px;font-family:"Noto Serif TC","PMingLiU",serif}
.hero-subtitle{font-size:clamp(19px,2vw,25px);line-height:1.55;color:var(--story-blue);font-weight:800;margin:0 0 24px}
.hero-body{font-size:18px;color:#37433f}.hero-body p{margin:0 0 13px}
.hero-scene{margin:0;border-radius:30px;overflow:hidden;background:#fff;border:1px solid #dfded8;box-shadow:0 25px 70px rgba(34,45,42,.17)}
.hero-scene img{display:block;width:100%;aspect-ratio:1.72/1;object-fit:cover}
.hero-scene figcaption{font-size:13px;color:var(--muted);padding:12px 16px;background:#fff}
.story-quote{margin:24px 0 0;padding:18px 20px 18px 24px;border:0;border-left:5px solid var(--story-blue);background:rgba(234,243,255,.75);border-radius:0 18px 18px 0;font-size:20px;font-weight:900;line-height:1.65;color:#193e68}
.story-section{padding:92px 0;scroll-margin-top:106px}.story-section-tint{background:linear-gradient(180deg,#f6f8f7,#f9faf9);border-top:1px solid #edf0ee;border-bottom:1px solid #edf0ee}
.story-split{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(300px,.75fr);gap:56px;align-items:center}.story-split-reverse{grid-template-columns:minmax(300px,.75fr) minmax(0,1.05fr)}
.story-heading{display:flex;align-items:flex-start;gap:15px;margin-bottom:24px}.story-heading h2{margin:0;font-size:clamp(31px,4vw,49px);line-height:1.16;letter-spacing:-.03em}.story-number{display:inline-grid;place-items:center;min-width:46px;height:46px;padding:0 10px;border-radius:15px;background:var(--story-blue-soft);color:var(--story-blue);font-size:15px;font-weight:900;letter-spacing:.08em}
.story-copy>p,.section-intro>p,.closing-copy>p{font-size:18px;color:#47534f;margin:0 0 16px}.story-copy>p:last-child,.section-intro>p:last-child,.closing-copy>p:last-child{margin-bottom:0}
.story-illustration{margin:0;border-radius:26px;overflow:hidden;background:#f2eee5;border:1px solid #deddd7;box-shadow:0 18px 46px rgba(23,32,31,.12)}
.story-illustration img{display:block;width:100%;height:100%;object-fit:cover}.portrait-scene{aspect-ratio:1/1.02}.portrait-scene img{object-position:center top}
.thought-list{list-style:none;margin:25px 0;padding:0;display:grid;gap:10px}.thought-list li{position:relative;padding:14px 16px 14px 46px;border:1px solid #dfe8ee;border-radius:16px;background:#fff;font-weight:750;color:#30413c}.thought-list li:before{content:"?";position:absolute;left:14px;top:12px;display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--story-blue-soft);color:var(--story-blue);font-weight:900}
.task-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:42px}.task-card{padding:24px;border:1px solid #dfE7e2;border-radius:21px;background:#fff;box-shadow:0 7px 23px rgba(23,32,31,.045)}.task-icon{display:grid;place-items:center;width:43px;height:43px;border-radius:13px;background:var(--story-green-soft);color:var(--story-green);font-size:22px;font-weight:900}.task-card h3{font-size:21px;margin:16px 0 7px}.task-card p{margin:0;color:var(--muted);font-size:15px}
.process-flow{list-style:none;margin:44px 0 0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.process-flow li{position:relative;padding:23px 17px;border-radius:20px;border:1px solid #dbe6ef;background:#fff;min-height:174px}.process-flow li:not(:last-child):after{content:"→";position:absolute;right:-13px;top:50%;z-index:2;transform:translateY(-50%);display:grid;place-items:center;width:25px;height:25px;border-radius:50%;background:#fff;color:var(--story-blue);font-weight:900}.process-index{display:grid;place-items:center;width:31px;height:31px;border-radius:50%;background:var(--story-blue);color:#fff;font-weight:900;margin-bottom:15px}.process-flow strong{display:block;font-size:18px}.process-flow p{margin:8px 0 0;color:var(--muted);font-size:14px;line-height:1.55}
.method-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:40px}.method-card{padding:23px;border-radius:21px;border:1px solid #eadfce;background:var(--story-paper)}.method-card>span{display:inline-block;padding:5px 10px;border-radius:99px;background:var(--story-orange-soft);color:var(--story-orange);font-weight:900;font-size:13px}.method-card h3{font-size:20px;line-height:1.35;margin:14px 0 8px}.method-card p{margin:0;color:var(--muted);font-size:15px}
.classroom-change{background:radial-gradient(circle at 80% 10%,#fff1d7,rgba(255,241,215,0) 32%)}.voice-cloud{display:grid;gap:10px;margin-top:28px}.voice{width:fit-content;max-width:95%;padding:11px 15px;background:#fff;border:1px solid #d9e5ee;border-radius:18px 18px 18px 3px;color:#245c95;font-weight:850;box-shadow:0 8px 20px rgba(23,32,31,.06)}.voice-2,.voice-4{justify-self:end;border-radius:18px 18px 3px 18px;background:#f0f8f3;color:#34724e;border-color:#d9e9df}
.relationship-section{background:#f4f7fa}.section-intro{max-width:850px}.relationship-toolbar{margin:28px 0 16px;display:flex;align-items:center;gap:16px;flex-wrap:wrap}.relationship-reset{border:1px solid #cddbe8;background:#fff;color:var(--story-blue);border-radius:12px;padding:10px 14px;font-weight:900;cursor:pointer}.relationship-reset:hover{background:var(--story-blue-soft)}.relationship-toolbar p{margin:0;color:var(--muted);font-size:14px}.relationship-board{display:grid;grid-template-columns:minmax(0,1fr) 94px minmax(0,1fr);gap:20px;align-items:start}.relationship-column{border-radius:26px;padding:22px;background:#fff;border:1px solid #dfe6eb}.relationship-column h3{margin:0 0 17px;font-size:22px}.issue-column h3{color:var(--story-blue)}.practice-column h3{color:var(--story-green)}.relationship-list{display:grid;gap:10px}.relation-card{width:100%;text-align:left;border:1px solid #e0e7eb;background:#fff;border-radius:16px;padding:14px 15px;cursor:pointer;transition:opacity .2s,transform .2s,box-shadow .2s,border-color .2s}.relation-card strong{display:block;font-size:16px;color:#23312d}.relation-card span{display:block;margin-top:4px;color:var(--muted);font-size:13px;line-height:1.45}.relation-card:hover{transform:translateY(-2px);box-shadow:0 7px 20px rgba(23,32,31,.08)}.issue-card.is-active{border-color:var(--story-blue);background:var(--story-blue-soft);box-shadow:0 0 0 3px rgba(47,114,196,.11)}.practice-card.is-active{border-color:var(--story-green);background:var(--story-green-soft);box-shadow:0 0 0 3px rgba(60,141,99,.11)}.relation-card.is-muted{opacity:.25}.relationship-middle{min-height:500px;display:grid;place-items:center;position:relative}.relationship-middle:before{content:"";position:absolute;top:30px;bottom:30px;width:2px;background:linear-gradient(var(--story-blue),var(--story-green));opacity:.35}.relationship-middle span{position:relative;z-index:1;writing-mode:vertical-rl;background:#f4f7fa;padding:10px 5px;color:var(--muted);font-size:13px;font-weight:900;letter-spacing:.1em}
.workbook-section{background:#fffdf9}.workbook-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:38px}.workbook-card{display:grid;grid-template-columns:42% 1fr;overflow:hidden;border:1px solid #e3dfd4;border-radius:23px;background:#fff;box-shadow:0 11px 30px rgba(23,32,31,.06)}.workbook-card>a{display:block;background:#ece9e1;overflow:hidden}.workbook-card img{display:block;width:100%;height:100%;min-height:320px;object-fit:cover;object-position:top;transition:transform .3s}.workbook-card a:hover img{transform:scale(1.025)}.workbook-card-copy{padding:25px}.workbook-card h3{margin:0 0 10px;font-size:22px}.workbook-card p{margin:0 0 17px;color:var(--muted)}.workbook-card span{display:inline-flex;padding:7px 10px;border-radius:99px;background:var(--story-orange-soft);color:#9b5e23;font-size:13px;font-weight:900}.center-actions{display:flex;justify-content:center;margin-top:32px}
.tired-section{padding:96px 0;background:linear-gradient(135deg,var(--story-night),var(--story-night-2));color:#fff}.tired-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(300px,.7fr);align-items:center;gap:56px}.tired-copy h2{font-size:clamp(46px,7vw,84px);line-height:1;margin:17px 0 26px;letter-spacing:-.05em}.tired-copy>p{font-size:18px;color:rgba(255,255,255,.78);margin:0 0 15px}.tired-copy ul{display:grid;grid-template-columns:1fr 1fr;gap:10px 22px;padding:0;margin:26px 0;list-style:none}.tired-copy li{position:relative;padding:10px 0 10px 25px;border-bottom:1px solid rgba(255,255,255,.12);color:rgba(255,255,255,.86)}.tired-copy li:before{content:"";position:absolute;left:3px;top:20px;width:8px;height:8px;border-radius:50%;background:#efb25d}.tired-section .story-number{background:rgba(255,255,255,.1);color:#fff}.tired-section .story-quote{background:rgba(255,255,255,.08);border-left-color:#efb25d;color:#fff}.tired-scene{aspect-ratio:1/1.02;box-shadow:0 26px 60px rgba(0,0,0,.3);border-color:rgba(255,255,255,.15)}
.ai-section{background:linear-gradient(180deg,#f7fbff,#fff)}
.before-after{max-width:920px;margin:36px auto 0;border:1px solid #dbe5ec;border-radius:24px;overflow:hidden;background:#fff;box-shadow:0 12px 38px rgba(23,32,31,.055)}.before-after-head,.before-after-row{display:grid;grid-template-columns:1fr 44px 1fr;align-items:center}.before-after-head{padding:16px 20px;background:#edf4fb;color:#234e7c}.before-after-head strong:last-child{color:#34724e}.before-after-row{padding:14px 20px;border-top:1px solid #edf0f2}.before-after-row>div{font-weight:750}.before-after-row>span{text-align:center;color:var(--story-blue);font-size:19px}.app-showcase{display:grid;grid-template-columns:.8fr 1.2fr;gap:44px;align-items:center;margin-top:48px;padding:38px;border-radius:30px;background:linear-gradient(135deg,#1e514f,#327a76);color:#fff}.app-closing p{font-size:18px;line-height:1.8;color:rgba(255,255,255,.86)}.app-closing .btn{margin-top:12px;background:#fff;color:#1e514f;border-color:#fff}.app-phones{display:grid;grid-template-columns:repeat(3,1fr);gap:13px;align-items:end}.app-phones figure{margin:0;border:7px solid #101514;border-radius:25px;overflow:hidden;background:#111;box-shadow:0 17px 35px rgba(0,0,0,.22)}.app-phones figure:nth-child(2){transform:translateY(-18px)}.app-phones img{display:block;width:100%}
.learning-app-section{background:#f7f7f2}.learning-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:36px 0}.learning-flow>div{position:relative;display:flex;align-items:center;gap:11px;padding:17px;border:1px solid #dde4dc;border-radius:17px;background:#fff}.learning-flow>div:not(:last-child):after{content:"→";position:absolute;right:-14px;z-index:2;color:var(--story-green);font-weight:900}.learning-flow span{display:grid;place-items:center;width:30px;height:30px;flex:0 0 auto;border-radius:50%;background:var(--story-green);color:#fff;font-weight:900}.learning-flow strong{font-size:15px}.learning-app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.learning-app-card{display:block;padding:27px;border-radius:23px;border:1px solid #dce4dd;background:#fff;text-decoration:none;transition:.2s}.learning-app-card:hover{transform:translateY(-4px);box-shadow:0 14px 32px rgba(23,32,31,.09);border-color:#a7c7b3}.learning-app-icon{display:grid;place-items:center;width:49px;height:49px;border-radius:15px;background:var(--story-green-soft);color:var(--story-green);font-size:25px}.learning-app-card h3{font-size:22px;margin:17px 0 7px}.learning-app-card p{color:var(--muted);margin:0 0 17px}.learning-app-card>strong{color:var(--story-green)}
.closing-section{padding:96px 0;background:linear-gradient(180deg,#fff,#f4efe5)}.closing-card{max-width:930px;padding:48px;border-radius:34px;background:rgba(255,255,255,.88);border:1px solid #ded8cc;box-shadow:0 25px 70px rgba(23,32,31,.1);text-align:center}.closing-card h2{font-size:clamp(36px,5vw,59px);line-height:1.12;margin:20px auto 25px}.closing-copy{text-align:left;max-width:780px;margin:auto}.closing-card .story-quote{text-align:left}.closing-actions{justify-content:center}
.teaching-footer{background:#f5f2ec}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .65s ease,transform .65s ease}.reveal.is-visible{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal{opacity:1;transform:none;transition:none}.workbook-card img,.learning-app-card,.relation-card{transition:none}}
@media(max-width:1020px){.teaching-nav-links{display:none;position:absolute;left:0;right:0;top:84px;padding:13px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.teaching-nav-links.is-open{display:flex}.teaching-nav-links a{padding:12px 14px}.nav-toggle{display:block}.teaching-hero-grid,.story-split,.story-split-reverse,.tired-grid{grid-template-columns:1fr}.hero-scene{order:-1;max-width:760px;margin:auto}.portrait-scene,.tired-scene{max-width:550px;justify-self:center;width:100%}.task-grid,.method-grid{grid-template-columns:repeat(2,1fr)}.process-flow{grid-template-columns:1fr}.process-flow li{min-height:0;display:flex;gap:15px}.process-flow li:not(:last-child):after{content:"↓";right:50%;top:auto;bottom:-19px;transform:translateX(50%)}.relationship-board{grid-template-columns:1fr}.relationship-middle{min-height:38px}.relationship-middle:before{left:30px;right:30px;top:50%;bottom:auto;width:auto;height:2px}.relationship-middle span{writing-mode:horizontal-tb;padding:5px 10px}.app-showcase{grid-template-columns:1fr}.app-phones{max-width:630px}.learning-flow{grid-template-columns:1fr 1fr}.learning-flow>div:nth-child(2):after{display:none}.workbook-card{grid-template-columns:38% 1fr}}
@media(max-width:700px){.teaching-nav-controls .lang{min-width:96px;max-width:110px}.wrap{width:min(100% - 28px,1160px)}.teaching-nav{height:76px}.brand img{width:58px;height:58px}.teaching-nav-links{top:70px}.teaching-hero{padding:28px 0 56px}.hero-copy h1{font-size:44px}.hero-subtitle{font-size:18px}.story-section{padding:67px 0}.story-heading{display:block}.story-number{margin-bottom:13px}.story-heading h2{font-size:34px}.story-copy>p,.section-intro>p,.closing-copy>p,.hero-body{font-size:16px}.story-quote{font-size:17px}.task-grid,.method-grid,.workbook-grid,.learning-app-grid{grid-template-columns:1fr}.workbook-card{grid-template-columns:1fr}.workbook-card img{height:auto;min-height:0;aspect-ratio:3/2;object-fit:cover}.relationship-column{padding:16px}.tired-copy h2{font-size:55px}.tired-copy ul{grid-template-columns:1fr}.before-after-head{display:none}.before-after-row{grid-template-columns:1fr;gap:7px;padding:16px}.before-after-row>span{transform:rotate(90deg)}.app-showcase{padding:25px}.app-phones{gap:7px}.app-phones figure{border-width:4px;border-radius:17px}.learning-flow{grid-template-columns:1fr}.learning-flow>div:not(:last-child):after{content:"↓";right:50%;bottom:-17px;top:auto;transform:translateX(50%)}.learning-flow>div:nth-child(2):after{display:block}.closing-card{padding:30px 21px}.closing-card h2{font-size:38px}.closing-actions{align-items:stretch}.closing-actions .btn{width:100%}}