/* 首頁：結構與樣式照 Vibe Coding 入口頁（vibe-coding-entry-variants/c-original/style.css），換成本書淺紫色票；只用於 index.html。
   規格：docs/superpowers/specs/2026-10-01-ai-agent-book-home-redesign-design.md */
.home{--card:#fff;--sand:var(--soft);--ink2:#4a4554;--deep:#3b2d48;--hl:#7fd3c6;font-size:15px;line-height:1.75}
main.home{padding:0}
.wrap{max-width:1460px;margin:0 auto;padding:0 42px}
.kicker{margin:0 0 8px;font-size:11px;font-weight:700;letter-spacing:.16em;color:var(--plum)}.kicker span{color:var(--line);margin:0 4px}
.home h1,.home h2,.home h3{margin:0;color:var(--ink)}
.home h2{font-size:26px;line-height:1.3;font-weight:700}
.i-arrow{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
/* 按鈕 */
.btn{display:inline-flex;align-items:center;gap:10px;background:var(--ink);color:#fff;border-radius:999px;padding:10px 20px;font-size:14px;font-weight:500;white-space:nowrap;transition:background .2s}
.btn:hover{background:var(--deep);color:#fff}.btn .i-arrow{color:var(--hl);transition:transform .2s}.btn:hover .i-arrow{transform:translateX(3px)}
.btn-line{font-size:14px;color:var(--ink);border-bottom:1px solid var(--ink);padding-bottom:1px}.btn-line:hover{color:var(--teal);border-color:var(--teal)}
/* 首屏 */
.hero{padding:22px 0 16px}
.hero-in{display:grid;grid-template-columns:minmax(0,1fr) 500px;gap:44px;align-items:center}
.hero h1{font-size:32px;line-height:1.25;font-weight:700}
.hero h1 span{display:block;font-size:17px;font-weight:500;color:var(--ink2);margin-top:4px}
.lead{margin:10px 0 0;color:var(--ink2);font-size:14px;line-height:1.75;max-width:36em}
.cta{display:flex;align-items:center;gap:22px;margin-top:16px}
.hero-visual{margin:0}
.hero-visual img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;border-radius:14px;background:var(--sand)}
/* 區塊標題 */
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;margin-bottom:16px}
.sec-note{margin:0;max-width:36em;font-size:13px;color:var(--muted);text-align:right}
/* 全書地圖 */
.map{padding:4px 0 48px}
.map-card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px 28px 16px;box-shadow:0 20px 50px -36px #28253233}
.map h2{font-size:24px}
.legs{display:grid;grid-template-columns:repeat(4,auto);gap:16px}
.leg{min-width:0}
.leg-no{margin:0;font-size:10px;font-weight:700;letter-spacing:.14em;color:var(--muted)}
.leg h3{font-size:14px;margin:2px 0 10px;white-space:nowrap}
.track{position:relative;display:flex;justify-content:space-between;align-items:center;height:14px;margin:0 0 10px}
.track::before{content:"";position:absolute;left:0;right:-16px;top:6px;height:2px;background:var(--ink)}
.leg:last-child .track::before{right:0}
.stop{position:relative;width:12px;height:12px;border-radius:50%;background:var(--card);border:2px solid var(--ink);display:inline-block;flex-shrink:0}
.stop-start{background:var(--hl);border-color:var(--deep)}
.stop-mile{background:var(--ink)}
.stop-opt{border-color:var(--muted)}
.leg ol{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.leg-wide ol{grid-template-columns:1fr 1fr;column-gap:14px;grid-template-rows:repeat(3,auto);grid-auto-flow:column}
.leg ol a{display:flex;align-items:baseline;gap:8px;padding:4px 6px;margin:0 -6px;border-radius:6px;font-size:13px;line-height:1.5;color:var(--ink2);white-space:nowrap}
.leg ol a:hover{background:var(--sand);color:var(--ink)}
.leg ol b{font-size:11px;color:var(--teal);font-variant-numeric:tabular-nums;font-weight:700}
.miles{display:flex;flex-wrap:wrap;gap:8px 26px;list-style:none;margin:14px 0 0;padding:12px 0 0;border-top:1px dashed var(--line);font-size:12px;color:var(--ink2)}
.miles li{display:flex;align-items:center;gap:8px}.miles .stop{width:10px;height:10px}
.miles-opt{margin-left:auto;color:var(--muted)}
/* 怎麼讀、講解動畫：卡片 */
.paths,.anims{padding:30px 0 56px;border-top:1px solid var(--line)}
.paths .sec-head,.anims .sec-head{margin-top:26px}
.path-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.anim-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.part{display:grid;grid-template-columns:1fr auto;gap:2px 12px;align-content:start;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:13px 16px;transition:border-color .2s,transform .2s}
a.part:hover{border-color:var(--ink);transform:translateY(-2px);color:inherit}
.p-name{font-weight:700;font-size:15px}
.p-meta{grid-column:1;font-size:13px;color:var(--ink2);line-height:1.7}
.p-no{grid-column:2;grid-row:1/span 2;align-self:center;font-size:11px;color:var(--teal);border:1px solid #25766d40;border-radius:999px;padding:2px 9px;white-space:nowrap}
.path-list .part{grid-template-columns:1fr}
.p-links{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}
.p-links .p-no{grid-column:auto;grid-row:auto}.p-links .p-no:hover{border-color:var(--teal)}
.stack{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none;margin:22px 0 0;padding:0;font-size:12px}
.stack li{border:1px solid var(--line);border-radius:999px;padding:4px 12px;color:var(--ink2);background:var(--card)}
.stack .stack-label{border:0;background:none;padding-left:0;font-weight:700;color:var(--ink)}
.stack .stack-note{border:0;background:none;margin-left:auto}.stack-note a{color:var(--muted);border-bottom:1px solid var(--line)}
/* 各章內容 */
.curriculum{padding:44px 0 30px;border-top:1px solid var(--line)}
.phase{display:grid;grid-template-columns:300px minmax(0,1fr);gap:44px;padding:30px 0;border-top:1px solid var(--line)}
.phase-side{align-self:start;position:sticky;top:92px}
.phase-side img{display:block;width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;border-radius:12px;background:var(--sand);margin-bottom:14px}
.phase-side h3{font-size:21px;margin:2px 0 6px}.phase-side p:last-child{margin:0;font-size:13px;color:var(--muted)}
.lesson{display:grid;grid-template-columns:54px minmax(0,1fr) 28px;gap:14px;padding:16px 10px;margin:0 -10px;border-bottom:1px solid var(--line);border-radius:10px;transition:background .2s}
.lesson:last-child{border-bottom:0}.lesson:hover{background:var(--card)}
.l-no{font-size:26px;line-height:1.1;color:#b9aec4;font-weight:700;transition:color .2s}.lesson:hover .l-no{color:var(--teal)}
.l-body{display:grid;gap:3px;min-width:0}.l-title strong{font-size:17px;line-height:1.5}
.l-desc{font-size:14px;color:var(--ink2)}
.l-secs{display:flex;flex-wrap:wrap;gap:2px 16px;list-style:none;margin:4px 0 0;padding:0;font-size:12.5px}
.l-secs a{color:var(--ink2)}.l-secs a:hover{color:var(--teal)}
.l-secs b{font-size:11px;font-weight:700;color:var(--teal);margin-right:5px;font-variant-numeric:tabular-nums}
.l-go{align-self:center;color:var(--muted);transition:transform .2s,color .2s}.lesson:hover .l-go{color:var(--ink);transform:translateX(3px)}
/* 常見問題 */
.faq{padding:44px 0 56px;border-top:1px solid var(--line)}
.faq-in{display:grid;grid-template-columns:300px minmax(0,1fr);gap:44px}
.faq details{border-bottom:1px solid var(--line);padding:15px 0}.faq details:first-child{border-top:1px solid var(--ink)}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:16px;font-weight:700;font-size:16px}
.faq summary::-webkit-details-marker{display:none}.faq summary::after{content:"+";color:var(--muted);font-weight:400}.faq details[open] summary::after{content:"–"}
.faq details p{margin:8px 0 0;color:var(--ink2);font-size:14px;max-width:44em}
.faq details a{border-bottom:1px solid #b9b0c1}
/* 結尾 */
.closing{padding:0 0 40px}
.closing-in{display:flex;align-items:center;justify-content:space-between;gap:40px;background:var(--deep);color:#d9cfe2;border-radius:18px;padding:36px 44px}
.closing h2{color:#fff;font-size:24px;margin-bottom:6px}.closing .kicker{color:#c7b3da}.closing p{margin:0;font-size:14px;max-width:44em}
.btn-light{background:#fff;color:var(--ink);flex-shrink:0}.btn-light:hover{background:var(--soft);color:var(--ink)}.btn-light .i-arrow{color:var(--teal)}
.wrap>.foot{max-width:none;margin:0 0 30px}
/* 響應式 */
@media(max-width:1339px){.legs{grid-template-columns:auto auto}.track::before{right:0}}
@media(max-width:860px){.wrap{padding:0 22px}.hero-in{grid-template-columns:1fr;gap:22px}.hero-visual{max-width:640px}
.sec-head{display:block}.sec-note{text-align:left;margin-top:6px}
.path-list,.anim-list{grid-template-columns:1fr}
.legs{grid-template-columns:1fr}.leg+.leg{border-top:1px solid var(--line);padding-top:14px}
.phase,.faq-in{grid-template-columns:1fr;gap:16px}.phase-side{position:static;display:grid;grid-template-columns:120px 1fr;column-gap:16px}.phase-side img{grid-row:1/span 3;margin:0}
.closing-in{display:block;padding:28px 24px}.closing .btn{margin-top:18px}}
@media(max-width:560px){.home{font-size:14px}.hero{padding:22px 0 18px}.hero h1{font-size:28px}.hero h1 span{font-size:16px}
.map-card{padding:20px 18px 16px;border-radius:14px}.leg-wide ol{grid-template-columns:1fr;grid-template-rows:none;grid-auto-flow:row}.leg ol a{white-space:normal}.leg h3{white-space:normal}
.miles{display:grid}.miles-opt{margin-left:0}
.anim-list .part{grid-template-columns:1fr}.anim-list .p-no{grid-column:1;grid-row:auto;justify-self:start;margin-top:6px}
.lesson{grid-template-columns:38px minmax(0,1fr) 18px;gap:10px}.l-no{font-size:20px}.l-title strong{font-size:16px}.stack .stack-note{margin-left:0}}