html,body{overflow-x:clip}
.wrap{max-width:1180px;margin:auto;padding:0 28px;position:relative}
.hero-band{border-bottom:2px solid var(--blue);overflow:hidden;position:relative}
.hero-band .wrap{padding-top:34px;padding-bottom:30px;min-height:300px}
.portal-orbit{position:absolute;right:-120px;top:-150px;width:620px;height:auto;pointer-events:none}
.hero-text{position:relative;z-index:1;max-width:720px}
.kicker{font-weight:800;letter-spacing:.2em;color:var(--blue);border-top:2px solid var(--blue);display:inline-block;padding-top:8px;margin:0 0 12px;font-size:15px}
.hero-text h1{font-size:clamp(46px,7vw,92px);line-height:1.02;margin:0;color:var(--blue);font-weight:900}
.hero-text .h2{font-size:clamp(22px,3vw,36px);font-weight:800;color:var(--blue);margin:8px 0 16px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.hero-text .poster-tag{margin:0;font-size:clamp(14px,1.4vw,18px)}
.info{display:flex;flex-wrap:wrap;gap:6px 22px;font-size:16px;margin:0}
.info span{white-space:nowrap}.info b{color:var(--blue);margin-right:8px;padding-right:8px;border-right:2px solid var(--blue)}
.meet-callout{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-top:26px;padding:18px 22px;background:var(--paper);border-left:6px solid var(--amber);border-radius:6px;box-shadow:var(--shadow)}
.meet-callout div{display:grid;gap:2px}.meet-callout-label{font-size:13px;font-weight:800;letter-spacing:.08em;color:var(--amber-ink)}
.meet-callout strong{font-size:clamp(20px,2vw,26px);color:var(--blue);line-height:1.3}
.meet-callout a{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:44px;padding:9px 17px;background:var(--blue);color:#fff;border-radius:6px;font-weight:750;text-decoration:none;white-space:nowrap}
.meet-callout a:hover{background:var(--blue-2)}.meet-callout a:focus-visible{outline:3px solid var(--amber);outline-offset:3px}
.section-title{font-size:28px;font-weight:900;color:var(--blue);display:flex;align-items:baseline;gap:16px;flex-wrap:wrap;margin:38px 0 16px}
.section-title span{font-size:16px;font-weight:500;color:var(--muted)}
.chapters{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.chapter{display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto 1fr auto;column-gap:18px;background:var(--paper);border-radius:6px;box-shadow:var(--shadow);padding:22px 24px 18px;text-decoration:none;color:inherit;border-left:6px solid var(--blue);transition:transform .15s ease,box-shadow .15s ease;min-height:200px}
a.chapter:hover,.chapter:has(a:hover){transform:translateY(-2px);box-shadow:0 10px 26px rgba(22,41,74,.14);border-left-color:var(--amber)}
.chapter .n{grid-row:1 / span 4;width:1.25em;font-size:56px;font-weight:900;color:var(--amber);line-height:.9;letter-spacing:-.02em}
.chapter .meta{font-size:14px;color:var(--muted);letter-spacing:.06em}
.chapter b{font-size:clamp(21px,2.1vw,27px);color:var(--blue);line-height:1.3;margin:2px 0 6px}
.chapter .desc{font-size:16px;color:var(--muted);line-height:1.55}
.chapter .foot{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:14px;flex-wrap:wrap}
.chapter .count{font-size:13px;color:var(--amber-ink);background:var(--amber-soft);border-radius:99px;padding:2px 10px}
.chapter .count:empty{display:none}
.chapter .go,.btn{display:inline-block;background:var(--blue);color:#fff;font-weight:700;border-radius:4px;padding:7px 16px;text-decoration:none;font-size:15px}
.chapter .go-group{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.chapter .go-group a:not(.go){font-size:14px}
.chapter.later{grid-column:1 / -1;background:transparent;box-shadow:none;border:2px dashed var(--grey);border-left-width:2px;min-height:0}
.chapter.later .n{font-size:36px;color:var(--muted);width:auto}
.latest-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.latest-head .section-title{margin-bottom:12px}
.latest-list{display:grid;gap:10px}
.latest-item{display:grid;gap:3px;background:var(--paper);border-radius:6px;padding:12px 16px;text-decoration:none;color:inherit;box-shadow:var(--shadow)}
.latest-item:hover{outline:2px solid var(--amber)}
.latest-item .where{font-size:13px;color:var(--blue);font-weight:700}
.latest-item .body{font-size:16px;white-space:pre-wrap;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.latest-item .who{font-size:13px;color:var(--muted)}
.ok{color:var(--green)}
.muted{color:var(--muted)}
.how{margin-top:34px;background:var(--paper);border-left:6px solid var(--amber);padding:16px 22px;font-size:16px}
.how h2{font-size:19px;margin:0 0 6px;color:var(--blue)}.how ol{margin:0;padding-left:1.2em}.how li{margin:.25em 0}
.site-foot{margin:34px 0 60px;font-size:14px;color:var(--muted);display:flex;gap:18px;flex-wrap:wrap}
@media(max-width:760px){.chapters{grid-template-columns:1fr}.portal-orbit{opacity:.25;right:-260px}.chapter .n{font-size:42px}}
@media(max-width:560px){.meet-callout{align-items:stretch;flex-direction:column}.meet-callout a{width:100%}}
/* 全部留言頁 */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin:22px 0 14px}
.tabs button{border:2px solid var(--blue);background:transparent;color:var(--blue);border-radius:4px;padding:6px 14px;font-weight:700}
.tabs button[aria-pressed=true]{background:var(--blue);color:#fff}
.slide-group{margin:0 0 22px}
.slide-group h3{display:flex;justify-content:space-between;gap:12px;align-items:baseline;font-size:18px;color:var(--blue);border-bottom:2px solid var(--blue);padding-bottom:6px;margin:0 0 10px}
.slide-group h3 a{font-size:14px;font-weight:600}
.lesson-head{font-size:24px;font-weight:900;color:var(--blue);margin:30px 0 12px;display:flex;align-items:center;gap:12px}
.lesson-head .n{color:var(--amber)}
.c-item{background:var(--paper);border-radius:6px;box-shadow:var(--shadow);padding:12px 16px;margin:0 0 10px}
.c-meta{font-size:13px;color:var(--muted);display:flex;gap:8px;flex-wrap:wrap;align-items:center}.c-meta b{color:var(--ink);font-size:14px}
.c-body{white-space:pre-wrap;overflow-wrap:anywhere;margin:4px 0 0;font-size:16px;line-height:1.55}
.c-reply{margin:10px 0 0 12px;padding:8px 12px;border-left:3px solid var(--blue);background:var(--bg);border-radius:0 6px 6px 0}
.role{background:var(--blue);color:#fff;border-radius:99px;padding:0 8px;font-size:11px}
.search{width:100%;max-width:420px;font:inherit;padding:8px 12px;border:1px solid var(--grey);border-radius:4px;background:#fff}

/* 第 3 堂：Twinkle Hub 官方教材按鈕（沿用官方 logo 與黃黑配色） */
.chapter.tw{border-left-color:#FFD400}
.chapter.tw:has(a:hover){border-left-color:#FFD400}
.tw-btn{display:inline-flex;align-items:center;gap:10px;background:#FFD400;color:#0B0B0F;font-weight:800;font-size:15px;line-height:1.15;border:2px solid #0B0B0F;border-radius:999px;padding:4px 14px 4px 4px;text-decoration:none;box-shadow:3px 3px 0 #0B0B0F;transition:transform .12s ease,box-shadow .12s ease}
.tw-btn img{width:30px;height:30px;border-radius:50%;flex:none}
.tw-btn small{display:block;font-size:11px;font-weight:700;letter-spacing:.03em;opacity:.78}
.tw-btn .tw-tag{font-size:11px;font-weight:700;background:#0B0B0F;color:#FFD400;border-radius:99px;padding:2px 7px}
.tw-btn:hover{transform:translate(-1px,-1px);box-shadow:4px 4px 0 #0B0B0F;color:#0B0B0F}
.tw-btn:focus-visible{outline:3px solid #0B0B0F;outline-offset:3px}