:root{
  --navy:#1B3A6B; --navy-2:#122a4f; --ink:#1b2430; --mute:#5c6776; --line:#e3e8ef;
  --bg:#ffffff; --alt:#f5f7fb; --accent:#e8590c; --radius:14px;
  --shadow:0 1px 2px rgba(16,24,40,.05),0 10px 30px rgba(16,24,40,.07);
  --font:"Inter","Noto Sans TC",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang TC","Microsoft JhengHei",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--navy)}
h1,h2,h3{line-height:1.25;margin:0 0 .5em;letter-spacing:-.01em}
h2{font-size:clamp(1.6rem,3vw,2.1rem)}
p{margin:0 0 1em}
.wrap{max-width:1120px;margin:0 auto;padding:0 22px}
.narrow{max-width:780px}
.muted{color:var(--mute)}
.en{color:var(--mute);font-size:.95em}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;font-weight:600;color:var(--accent);margin-bottom:.6em}

/* nav */
.nav{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;min-height:72px;padding:8px 0;gap:16px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);min-width:0;flex:0 1 auto}
.brand-logo{height:42px;width:auto;max-width:min(200px,42vw);display:block;flex:none}
.brand-en{display:flex;flex-direction:column;line-height:1.15;border-left:1px solid var(--line);padding-left:12px}
.brand-en strong{font-size:.92rem;font-weight:600;color:var(--ink)}
.brand-en small{color:var(--mute);font-size:.7rem}
.footer-en{color:#cdd8e6;margin:4px 0 8px;font-size:.92rem}
.nav-links{display:flex;align-items:center;gap:22px}
.nav-links a{text-decoration:none;color:var(--ink);font-size:.92rem;font-weight:500}
.nav-links a:hover{color:var(--navy)}
.nav-links .nav-login{color:var(--mute);font-size:.82rem;border:1px solid var(--line);padding:6px 12px;border-radius:999px}
.nav-links .nav-login:hover{border-color:var(--navy);color:var(--navy)}
.nav-toggle,.nav-burger{display:none}

/* buttons */
.btn{display:inline-block;padding:12px 22px;border-radius:10px;font-weight:600;text-decoration:none;font-size:.95rem;border:1px solid transparent;cursor:pointer;font-family:inherit;transition:.15s}
.btn-primary{background:var(--navy);color:#fff}
.btn-primary:hover{background:var(--navy-2)}
.btn-ghost{border-color:rgba(18,58,99,.25);color:var(--navy);background:#fff}
.btn-ghost:hover{border-color:var(--navy)}
.btn-block{width:100%}

/* hero */
.hero{background:radial-gradient(1200px 500px at 85% -10%,#ffe8d9 0,transparent 60%),radial-gradient(900px 500px at -10% 110%,#dfeaf7 0,transparent 60%),linear-gradient(180deg,#f7f9fc,#fff);padding:clamp(64px,10vw,120px) 0 clamp(56px,8vw,96px);border-bottom:1px solid var(--line)}
.hero h1{font-size:clamp(2rem,5vw,3.3rem);font-weight:700;max-width:820px}
.hero h1 span{display:block;font-size:.5em;font-weight:500;color:var(--mute);margin-top:.5em;letter-spacing:0}
.lead{font-size:1.1rem;max-width:680px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}

/* sections */
.section{padding:clamp(56px,8vw,96px) 0}
.section-alt{background:var(--alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:640px;margin-bottom:36px}
.page-head{padding:clamp(48px,7vw,80px) 0 0}
.page-head h1{font-size:clamp(1.9rem,4vw,2.6rem)}

/* cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:22px}
.card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px 24px;box-shadow:var(--shadow);display:flex;flex-direction:column;overflow:hidden;transition:transform .15s,box-shadow .15s}
.card:before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:var(--accent)}
.card:hover{transform:translateY(-3px);box-shadow:0 2px 4px rgba(16,24,40,.06),0 18px 40px rgba(16,24,40,.1)}
.card-tag{font-size:.78rem;font-weight:600;color:var(--accent);margin-bottom:.4em}
.card h3{font-size:1.35rem}
.card h3 small{display:block;font-size:.8rem;font-weight:500;color:var(--mute);margin-top:4px}
.card .en{font-size:.9rem}
.card-link{margin-top:auto;font-weight:600;text-decoration:none;color:var(--accent);font-size:.93rem}
.card-link:hover span{margin-left:4px}

/* schools */
.split{display:grid;grid-template-columns:1.2fr 1fr;gap:48px;align-items:center}
.features{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.features li{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px;display:flex;flex-direction:column}
.features strong{font-size:1rem}
.features span{color:var(--mute);font-size:.9rem}

/* access */
.access{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
.access-item{display:flex;align-items:center;gap:16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;text-decoration:none;color:var(--ink);transition:.15s}
.access-item:hover{border-color:var(--navy);box-shadow:var(--shadow)}
.access-item small{display:block;color:var(--mute);font-size:.85rem;margin-top:2px}
.access-icon{font-size:1.7rem;width:52px;height:52px;border-radius:12px;background:var(--alt);display:grid;place-items:center;flex:none}

/* contact */
.contacts{list-style:none;padding:0;margin:24px 0 0;border-top:1px solid var(--line)}
.contacts li{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:16px 0;border-bottom:1px solid var(--line)}
.contacts small{display:block;color:var(--mute);font-size:.85rem}
.contacts a{font-weight:600;text-decoration:none;align-self:center}

/* books */
.books{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:22px}
.book{display:flex;gap:18px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.book-cover{flex:none;width:96px;aspect-ratio:2/3;border-radius:8px;overflow:hidden;background:linear-gradient(160deg,var(--navy),#2b8a3e);display:grid;place-items:center;color:#fff;font-weight:700;font-size:1.3rem}
.book-cover img{width:100%;height:100%;object-fit:cover}
.book h3{font-size:1.1rem}
.book h3 small{display:block;color:var(--mute);font-weight:500;font-size:.85rem}
.book-meta{color:var(--mute);font-size:.85rem}
.empty{text-align:center;border:1px dashed #cdd5e0;border-radius:var(--radius);padding:56px 24px;background:var(--alt)}
.empty-icon{font-size:2.4rem;margin:0}

/* login */
.login-wrap{min-height:calc(100vh - 68px - 200px);display:grid;place-items:center;padding:56px 18px;background:radial-gradient(800px 400px at 50% -10%,#dfeaf7 0,transparent 70%),var(--alt)}
.login-card{width:100%;max-width:420px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:36px 32px;box-shadow:var(--shadow)}
.login-card h1{font-size:1.7rem}
.login-card h1 span{display:block;font-size:.55em;color:var(--mute);font-weight:500;margin-top:4px}
.login-form{display:grid;gap:6px;margin-top:20px}
.login-form label{font-weight:600;font-size:.9rem;margin-top:10px}
.login-form label small{color:var(--mute);font-weight:500}
.login-form input[type=text],.login-form input[type=password]{width:100%;padding:12px 14px;border:1px solid #cfd7e2;border-radius:10px;font-size:1rem;font-family:inherit}
.login-form input:focus{outline:none;border-color:var(--navy);box-shadow:0 0 0 3px rgba(18,58,99,.15)}
.login-form .btn{margin-top:18px}
.alert{background:#fdecec;color:#a61b1b;border:1px solid #f5c2c2;border-radius:10px;padding:10px 14px;font-size:.92rem}
.login-foot{margin:22px 0 0;font-size:.88rem;text-align:center}
.login-foot a{color:var(--mute);text-decoration:none}

/* footer */
.footer{background:var(--navy-2);color:#cdd8e6;padding:48px 0 24px;font-size:.92rem}
.footer strong{color:#fff}
.footer .muted{color:#9fb0c6;margin-top:8px}
.footer-inner{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap}
.footer-links{display:flex;flex-direction:column;gap:6px}
.footer a{color:#cdd8e6;text-decoration:none}
.footer a:hover{color:#fff}
.copyright{border-top:1px solid rgba(255,255,255,.1);margin-top:32px;padding-top:18px;color:#8ea1b9;font-size:.82rem}

/* mobile */
@media (max-width:860px){
  .split{grid-template-columns:1fr;gap:28px}
  .nav-burger{display:flex;flex-direction:column;gap:5px;cursor:pointer;padding:10px}
  .nav-burger span{width:22px;height:2px;background:var(--ink);border-radius:2px}
  .nav-links{position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start;gap:0;padding:8px 22px 16px;display:none}
  .nav-links a{padding:10px 0;width:100%}
  .nav-links .nav-login{margin-top:8px;width:auto}
  .nav-toggle:checked ~ .nav-links{display:flex}
}
@media (max-width:480px){
  .brand-en{display:none}
  .brand-logo{height:36px;max-width:min(168px,55vw)}
  .nav-inner{min-height:64px}
  .hero-cta .btn{width:100%;text-align:center}
  .login-card{padding:28px 22px}
}
.card-logo{width:48px;height:48px;border-radius:12px;object-fit:contain;margin-bottom:12px;border:1px solid var(--line);background:#fff}
.card-tagline{font-weight:600;color:var(--ink);margin-bottom:.6em}
.card-tagline span{display:block;font-weight:500;color:var(--mute);font-size:.9rem}

/* v5: card actions, book stores, about page */
.card-actions{margin-top:auto;display:flex;flex-direction:column;gap:12px}
.card-actions .card-link{margin-top:0}
.card-buttons{display:flex;flex-wrap:wrap;gap:8px}
.btn-sm{padding:8px 14px;font-size:.85rem;border-radius:8px}
.book-stores{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
.book-soon{color:var(--mute);font-size:.85rem;margin:0}
.about-hero{padding:clamp(48px,7vw,88px) 0 clamp(32px,5vw,56px);background:linear-gradient(180deg,#f7f9fc,#fff);border-bottom:1px solid var(--line)}
.about-hero h1{font-size:clamp(1.9rem,4.5vw,2.8rem);margin-bottom:.2em}
.about-hero .en-name{color:var(--mute);font-size:1.1rem;margin-bottom:1.2em}
.about-logo{height:120px;width:auto;margin-bottom:24px}
.mission{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:22px}
.mission > div{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.product-list{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.product-list li{display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:12px;padding:18px 20px}
.product-list img{width:44px;height:44px;border-radius:10px;flex:none;object-fit:contain;border:1px solid var(--line);background:#fff}
.product-list h3{font-size:1.1rem;margin-bottom:.2em}
.product-list h3 small{color:var(--mute);font-weight:500;font-size:.85rem;margin-left:6px}
.product-list p{margin:0 0 .4em;font-size:.95rem}
.product-list .links{display:flex;flex-wrap:wrap;gap:14px;font-size:.9rem}
.product-list .links a{font-weight:600;text-decoration:none;color:var(--accent)}
/* v6: books grouped by language */
.book-tabs{position:sticky;top:64px;z-index:5;display:flex;gap:8px;flex-wrap:wrap;padding:10px 0;margin-bottom:8px;background:rgba(255,255,255,.94);backdrop-filter:blur(6px)}
.book-tabs a{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--navy);font-weight:600;font-size:.92rem;text-decoration:none}
.book-tabs a:hover{border-color:var(--navy)}
.book-tabs small{color:var(--mute);font-weight:500}
.book-tabs .count{background:var(--navy);color:#fff;border-radius:999px;padding:0 8px;font-size:.78rem;line-height:1.6}
.book-group{scroll-margin-top:130px;margin-top:28px}
.book-group h2{font-size:1.4rem;margin:0 0 16px;display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.book-group h2 span{color:var(--mute);font-weight:500;font-size:1rem}
.book-group h2 small{color:var(--mute);font-weight:500;font-size:.85rem}
.books-section .books{grid-template-columns:repeat(auto-fill,minmax(340px,1fr))}
.books-section .book{align-items:flex-start}
.books-section .book-cover{width:108px}
.book-body{min-width:0;display:flex;flex-direction:column;gap:6px}
.book-body h3{margin:0;line-height:1.35}
.book-body p{margin:0}
.book-desc{font-size:.9rem;color:#3d4757;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
@media (max-width:600px){
  .book-tabs{top:56px}
  .books-section .books{grid-template-columns:1fr}
  .books-section .book{padding:14px;gap:14px}
  .books-section .book-cover{width:88px}
  .book-desc{-webkit-line-clamp:5}
}
/* v7: SEO pages (reading-adventure, contact, privacy, terms) */
.placeholder{background:#fff3bf;color:#7a5b00;border:1px dashed #e0b400;border-radius:6px;padding:1px 6px;font-weight:600;font-size:.92em}
.draft-banner{background:#fff3bf;border:1px solid #f0d36b;color:#6b5200;border-radius:10px;padding:12px 16px;margin:0 0 24px;font-size:.92rem}
.legal{padding:clamp(32px,5vw,56px) 0 clamp(56px,8vw,96px)}
.legal h2{font-size:1.25rem;margin:2em 0 .6em;padding-top:.4em;border-top:1px solid var(--line)}
.legal h2 span{display:block;font-size:.8em;font-weight:500;color:var(--mute)}
.legal ul{padding-left:1.2em;margin:0 0 1em}
.legal li{margin-bottom:.4em}
.legal .en{display:block;margin-top:.2em}
.legal-meta{color:var(--mute);font-size:.9rem}
.ra-hero{background:radial-gradient(1000px 460px at 90% -10%,#ffe8d9 0,transparent 60%),linear-gradient(180deg,#fff8f3,#fff);padding:clamp(56px,9vw,104px) 0 clamp(48px,7vw,80px);border-bottom:1px solid var(--line)}
.ra-hero .split{align-items:center}
.ra-hero h1{font-size:clamp(2.1rem,5vw,3.2rem);margin-bottom:.3em}
.ra-hero h1 span{display:block;font-size:.45em;font-weight:500;color:var(--mute);margin-top:.5em;letter-spacing:0}
.ra-badges{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 18px;padding:0;list-style:none}
.ra-badges li{background:#fff;border:1px solid var(--line);border-radius:999px;padding:4px 12px;font-size:.82rem;font-weight:600;color:var(--accent)}
.ra-art{background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:32px;display:grid;place-items:center;gap:14px;text-align:center}
.ra-art img{width:140px;height:140px;border-radius:28px}
.ra-art p{margin:0;color:var(--mute);font-size:.9rem}
.ra-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:22px}
.ra-grid .card h3{font-size:1.2rem}
.faq{display:grid;gap:12px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 18px}
.faq summary{cursor:pointer;font-weight:600}
.faq details p{margin:.6em 0 0}
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;margin-top:8px}
.contact-grid > div{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px}
.contact-grid h3{font-size:1rem;margin-bottom:.3em}
.contact-grid p{margin:0}
.copyright a{color:#8ea1b9;text-decoration:underline}
.nav-links a{white-space:nowrap}
/* v7b: /k1-timeline */
.k1-hero{background:radial-gradient(900px 420px at 88% -10%,#ffe8d9 0,transparent 60%),radial-gradient(800px 420px at -10% 110%,#dfeaf7 0,transparent 60%),linear-gradient(180deg,#f7f9fc,#fff);padding:clamp(56px,9vw,104px) 0 clamp(44px,6vw,72px);border-bottom:1px solid var(--line)}
.k1-hero h1{font-size:clamp(2rem,5vw,3rem);margin-bottom:.35em}
.k1-hero .lead{font-size:1.12rem;max-width:720px}
.btn-wa{background:#128c4a;color:#fff}
.btn-wa:hover{background:#0e6f3a}
.k1-phone{color:var(--mute);font-size:.92rem;margin-top:10px}
.k1-notice{background:#fff4e6;border:2px solid #e8590c;border-radius:var(--radius);padding:20px 22px;margin:0}
.k1-notice h2{font-size:1.2rem;margin:0 0 .5em;color:#b8440a}
.k1-notice ul{margin:0;padding-left:1.2em}
.k1-notice li{margin:.25em 0;font-weight:600}
.k1-steps{list-style:none;margin:0;padding:0;display:grid;gap:16px;counter-reset:k1}
.k1-steps li{counter-increment:k1;position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px 18px 72px;box-shadow:var(--shadow)}
.k1-steps li:before{content:counter(k1);position:absolute;left:22px;top:20px;width:34px;height:34px;border-radius:50%;background:var(--navy);color:#fff;display:grid;place-items:center;font-weight:700}
.k1-steps h3{font-size:1.1rem;margin:0 0 .3em}
.k1-steps p{margin:0}
.k1-prices{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.k1-price{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:center;box-shadow:var(--shadow)}
.k1-price strong{display:block;font-size:2rem;color:var(--navy);line-height:1.2}
.k1-price span{color:var(--mute)}
.k1-facts{list-style:none;padding:0;margin:20px 0 0;border-top:1px solid var(--line)}
.k1-facts li{display:flex;gap:16px;flex-wrap:wrap;padding:12px 0;border-bottom:1px solid var(--line)}
.k1-facts b{min-width:6em}
.k1-need{columns:2 260px;column-gap:28px;padding-left:1.2em;margin:0}
.k1-need li{margin:.3em 0;break-inside:avoid}