/* 登峰私中 前台樣式 — hahow 風格改版:白底、天藍主色、圓角卡片與淺陰影、全無襯線。
   注意:變數名稱沿用舊版(--paper/--ink/--red/--gold...),各 blade 的內嵌樣式直接引用
   這些變數,只改「值」即可整站換皮;--serif 刻意指向 Noto Sans TC,讓所有
   font-family:var(--serif) 的標題自動變成無襯線粗體,不需逐頁修改。 */
:root{
  --paper:#FFFFFF;          /* 頁面底色(原考卷紙色) */
  --paper-line:#F2F4F6;     /* 淺灰區塊底(原橫格線色) */
  --ink:#383C40;            /* 主要文字 */
  --ink-soft:#5A6169;       /* 次要文字 */
  --red:#F0503C;            /* 價格/答錯/警示(原硃紅) */
  --red-soft:#FEEEEB;
  --pencil:#8A9096;         /* 說明文字 */
  --line:#E9EBED;           /* 邊框 */
  --white:#FFFFFF;
  --gold:#F5A623;           /* 點綴橘黃(原金色) */
  --primary:#00A3E0;        /* hahow 天藍主色 */
  --primary-dark:#0084B8;
  --primary-soft:#E8F6FC;
  --green:#2FB284;          /* 答對/成功 */
  --green-soft:#E7F7F1;
  --serif:'Noto Sans TC', -apple-system, sans-serif;  /* 刻意同 sans,見檔頭註解 */
  --sans:'Noto Sans TC', -apple-system, sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  color:var(--ink);
  background:var(--paper);
  line-height:1.7;
  font-size:15px;
}
button{font-family:var(--sans);cursor:pointer}
a{color:inherit}

/* ===== 記號(原紅筆批改記號,改為品牌藍) ===== */
.icon-md{display:inline-block;width:1.1em;height:1.1em;vertical-align:-0.18em;flex-shrink:0}
.pen-check{display:inline-block;width:1.1em;height:1.1em;vertical-align:-0.18em}
.pen-check path{stroke:var(--primary);stroke-width:2.5;fill:none;stroke-linecap:round;stroke-linejoin:round}
.pen-circle{display:inline-flex;align-items:center;justify-content:center;position:relative}
.pen-circle::after{content:'';position:absolute;inset:-4px -8px;border:2px solid var(--red);border-radius:50%;transform:rotate(-4deg)}
.pen-underline{background-image:linear-gradient(0deg, var(--primary-soft), var(--primary-soft));background-size:100% 12px;background-repeat:no-repeat;background-position:0 88%;padding:0 2px 4px}

/* ===== 導覽 ===== */
.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.95);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 6px rgba(20,40,60,.04);
}
.topbar-inner{max-width:1080px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.brand{font-weight:900;font-size:19px;letter-spacing:.04em;white-space:nowrap;text-decoration:none;order:1}
.brand em{color:var(--primary);font-style:normal}
.brand small{display:block;font-weight:400;font-size:10px;letter-spacing:.28em;color:var(--pencil)}
/* 桌機版視覺順序:品牌 / 置中的三個導覽項目 / 右側暱稱+登出貼在一起,
   用 order 調整,不動 HTML 結構(手機版另有 order:10 覆寫收合選單順序) */
.nav-menu{display:flex;align-items:center;order:2;flex:1;justify-content:center}
.nav-tabs{display:flex;gap:4px;flex-wrap:wrap}
.nav-tab{
  border:none;background:none;padding:7px 13px;border-radius:8px;text-decoration:none;
  font-size:13.5px;font-weight:500;color:var(--ink-soft);letter-spacing:.02em;
}
.nav-tab:hover{background:var(--primary-soft);color:var(--primary-dark)}
.nav-tab.active{background:var(--primary);color:#fff}
.nav-account{display:flex;align-items:center;gap:8px;order:3}
/* 桌機/手機各自獨立的登出按鈕(避免同一元素在兩種佈局裡互相遷就),
   預設(桌機)顯示桌機版、隱藏手機版;@media(max-width:860px) 再反過來,見下方 RWD 區塊 */
.nav-logout-desktop{order:4;display:block}
.nav-logout-mobile{display:none}
.nav-burger{
  display:none;border:1px solid var(--line);background:#fff;border-radius:8px;
  width:36px;height:36px;align-items:center;justify-content:center;color:var(--ink);
  cursor:pointer;flex-shrink:0;order:5;
}
.nav-burger svg{width:20px;height:20px}
.nav-burger:hover{border-color:var(--primary);color:var(--primary-dark)}

.page{max-width:1080px;margin:0 auto;padding:36px 20px 90px}

/* ===== 通用元件 ===== */
.eyebrow{font-size:12.5px;letter-spacing:.14em;color:var(--primary);font-weight:700;margin-bottom:10px}
.card{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:22px}
a.card{display:block;transition:border-color .12s, transform .12s, box-shadow .12s}
a.card:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,90,140,.10)}
.btn{
  display:inline-flex;align-items:center;gap:8px;justify-content:center;text-decoration:none;
  border:none;border-radius:8px;padding:12px 24px;
  font-size:15px;font-weight:700;letter-spacing:.02em;transition:transform .12s, box-shadow .12s, background .12s, border-color .12s, color .12s;
}
.btn:hover{transform:translateY(-1px)}
.btn-red{background:var(--primary);color:#fff;box-shadow:0 4px 14px rgba(0,163,224,.30)}
.btn-red:hover{background:var(--primary-dark)}
.btn-ink{background:var(--ink);color:#fff}
.btn-ink:hover{background:#22262a}
.btn-ghost{background:#fff;border:1.5px solid var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary-dark)}
.btn-sm{padding:7px 14px;font-size:13px;border-radius:8px}
.btn[disabled]{opacity:.4;cursor:not-allowed}
.tag{display:inline-block;font-size:11.5px;font-weight:700;padding:2px 9px;border-radius:99px;letter-spacing:.04em}
.tag-red{background:var(--red-soft);color:var(--red)}
.tag-ink{background:var(--primary-soft);color:var(--primary-dark)}
.tag-gold{background:#FEF3DF;color:#D4881C}
.section-title{font-weight:700;font-size:22px;margin-bottom:4px;letter-spacing:.01em}
.section-sub{color:var(--pencil);font-size:13.5px;margin-bottom:20px}

/* ===== 購買頁 ===== */
.hero{padding:44px 0 30px;display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}
.hero h1{font-weight:900;font-size:clamp(30px,4.4vw,44px);line-height:1.4;letter-spacing:.01em}
.hero .lede{margin-top:18px;color:var(--ink-soft);font-size:16px;max-width:44ch}
.hero-cta{margin-top:26px;display:flex;gap:12px;flex-wrap:wrap}
.hero-note{margin-top:12px;font-size:12.5px;color:var(--pencil)}

.price-card{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:26px;position:relative;box-shadow:0 8px 30px rgba(20,60,90,.10)}
.price-card .corner{position:absolute;top:-13px;right:18px;background:var(--gold);color:#fff;font-size:12px;font-weight:700;padding:4px 14px;border-radius:99px;letter-spacing:.08em}
.price-row{display:flex;align-items:baseline;gap:10px;margin:6px 0 2px}
.price-now{font-weight:900;font-size:40px;color:var(--red)}
.price-was{color:var(--pencil);text-decoration:line-through;font-size:15px}
.price-per{font-size:12.5px;color:var(--pencil);margin-bottom:16px}
.includes{list-style:none;border-top:1px solid var(--line);padding-top:16px;display:grid;gap:10px;font-size:14px}
.includes li{display:flex;gap:9px;align-items:flex-start}
.includes .hl{font-weight:700}
.price-card .btn{width:100%;margin-top:18px}
.login-hint{margin-top:12px;display:flex;gap:8px;justify-content:center;font-size:12px;color:var(--pencil);align-items:center}
.sso{display:inline-flex;align-items:center;gap:5px;border:1px solid var(--line);border-radius:8px;padding:3px 9px;background:#fff;font-weight:500;color:var(--ink-soft)}
.dot{width:9px;height:9px;border-radius:50%;display:inline-block}

/* ===== 官方社群登入按鈕(遵循 Google/LINE 品牌識別規範) ===== */
.sso-official{
  display:flex;align-items:center;justify-content:center;gap:10px;width:100%;
  border-radius:8px;padding:11px 16px;font-size:14.5px;font-weight:700;
  text-decoration:none;transition:box-shadow .12s,transform .12s;
}
.sso-official:hover{transform:translateY(-1px)}
.sso-official svg{width:19px;height:19px;flex-shrink:0}
.sso-google{background:#fff;color:#3C4043;border:1px solid #DADCE0}
.sso-google:hover{box-shadow:0 2px 6px rgba(60,64,67,.18);border-color:#DADCE0}
.sso-line{background:#06C755;color:#fff;border:1px solid #06C755}
.sso-line:hover{background:#05B34C;box-shadow:0 2px 8px rgba(6,199,85,.35)}
.sso-line svg{fill:#fff}

.trust-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:34px 0 46px}
.trust-strip .card{padding:18px 20px}
.trust-strip b{display:block;font-size:17px;margin-bottom:3px}
.trust-strip span{font-size:13px;color:var(--pencil)}

.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:46px}
.flow .card{position:relative;padding-top:30px}
.flow .step-mark{position:absolute;top:-14px;left:18px;background:var(--paper);padding:0 6px;font-weight:900;color:var(--primary);font-size:20px}
.flow b{display:block;margin-bottom:4px;font-size:14.5px}
.flow p{font-size:13px;color:var(--pencil);line-height:1.65}

.report-demo{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:center;background:var(--white);border:1px solid var(--line);border-radius:16px;padding:28px;margin-bottom:20px;box-shadow:0 4px 18px rgba(20,60,90,.05)}
.line-mock{background:#F4F7F5;border:1px solid #DFE7E1;border-radius:12px;padding:16px;font-size:13px}
.line-mock .line-head{display:flex;align-items:center;gap:8px;font-weight:700;margin-bottom:10px;font-size:13px}
.line-mock .line-head .dot{background:#06C755;width:22px;height:22px;border-radius:7px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:11px;font-weight:900}
.line-bubble{background:#fff;border:1px solid #E3E8E4;border-radius:10px;padding:12px 14px;line-height:1.8}
.line-bubble b{color:var(--primary-dark)}

/* ===== 學習地圖 ===== */
.map-head{display:flex;gap:24px;align-items:flex-end;flex-wrap:wrap;margin-bottom:26px}
.mastery-summary{margin-left:auto;display:flex;gap:22px}
.mastery-summary .m{text-align:center}
.mastery-summary .m b{font-size:26px;display:block;line-height:1.2;font-weight:900}
.mastery-summary .m span{font-size:11.5px;color:var(--pencil);letter-spacing:.06em}
.mastery-summary .m.warn b{color:var(--red)}

.unit{margin-bottom:22px}
.unit-head{display:flex;align-items:center;gap:12px;margin-bottom:10px;flex-wrap:wrap}
.unit-head h3{font-size:17.5px;font-weight:700}
.unit-head .bar{flex:1;min-width:120px;height:7px;background:var(--paper-line);border-radius:99px;overflow:hidden}
.unit-head .bar i{display:block;height:100%;background:var(--primary);border-radius:99px}
.unit-head .pct{font-size:12.5px;color:var(--pencil);white-space:nowrap}
.chapter-list{display:grid;gap:8px}
.chapter{
  background:var(--white);border:1px solid var(--line);border-radius:12px;
  padding:13px 16px;display:grid;grid-template-columns:34px 1fr auto auto;gap:14px;align-items:center;
  transition:border-color .12s, box-shadow .12s;
}
.chapter:hover{border-color:var(--primary);box-shadow:0 4px 14px rgba(0,90,140,.07)}
.ch-status{width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700}
.ch-status.done{background:none}
.ch-status.watching{background:var(--primary-soft);color:var(--primary-dark)}
.ch-status.review{color:var(--red)}
.ch-status.locked{background:var(--paper-line);color:#B6BBBF}
.ch-name{font-weight:500;font-size:14.5px}
.ch-name small{display:block;color:var(--pencil);font-weight:400;font-size:12px}
.ch-mastery{font-size:12px;color:var(--pencil);text-align:right;min-width:88px}
.ch-mastery b{display:block;font-size:16px;color:var(--ink);font-weight:700}
.ch-mastery.low b{color:var(--red)}

/* ===== 章節學習 ===== */
.learn-grid{display:grid;grid-template-columns:1.6fr 1fr;gap:22px}
.video-box{background:#1B2733;border-radius:12px;aspect-ratio:16/9;position:relative;overflow:hidden;color:#fff}
.video-box iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.video-box .vplay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px}
.vplay .pbtn{width:64px;height:64px;border-radius:50%;background:var(--primary);display:flex;align-items:center;justify-content:center;font-size:22px;color:#fff;box-shadow:0 6px 22px rgba(0,163,224,.5)}
.vplay span{font-size:13px;opacity:.75;letter-spacing:.1em}
.video-progress{position:absolute;bottom:0;left:0;right:0;height:5px;background:rgba(255,255,255,.2)}
.video-progress i{display:block;height:100%;background:var(--primary)}
.node-chips{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 4px}
.chip{font-size:12.5px;border:1px solid var(--line);background:#fff;border-radius:99px;padding:4px 12px;color:var(--ink-soft);text-decoration:none}
.chip:hover{border-color:var(--primary);color:var(--primary-dark)}
.chip.weak{border-color:var(--red);color:var(--red);background:var(--red-soft)}

/* 手機版練習卷題號列表收合標題列,桌機版一律不顯示(由 @media max-width:860px 開放) */
.qnav-toggle{display:none;width:100%;align-items:center;justify-content:space-between;background:none;border:none;padding:0;cursor:pointer;font-size:12px;color:var(--pencil);letter-spacing:.05em}
.qnav-toggle .qnav-toggle-arrow{transition:transform .15s}
#qNavCard.is-open .qnav-toggle .qnav-toggle-arrow{transform:rotate(180deg)}

.quiz-card{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:20px}
.quiz-card .qhead{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;font-size:12.5px;color:var(--pencil)}
.qtext{font-size:15px;font-weight:500;line-height:1.8;margin-bottom:14px}
/* 題幹/答案/詳解改用後台 RichEditor 編輯,內容為 HTML(可能含圖片),
   統一限制圖片最大寬度避免撐爆手機版版面。
   .rich-content 是共用 class,任何渲染 stem/answer_text/explanation 的容器都該加這個
   class(除了既有的 id 清單,那些是舊頁面留下來的,新頁面一律用 class 不要再各自加 id
   進這份清單——免費試寫頁面(sprint/courses/show.blade.php)曾經因為用了自己的 id
   前綴(#tStem 等)沒被下面這份 id 清單涵蓋到,導致 caption 沒隱藏、圖片跑版) */
.qtext img, #correctAnswer img, #explanationText img,
#simCorrectAnswer img, #simExplanationText img,
.node-practice-item img, .rich-content img{max-width:100%;max-height:400px;width:auto;height:auto;border-radius:8px;margin:6px 0}
.qtext p, #correctAnswer p, #explanationText p,
#simCorrectAnswer p, #simExplanationText p, .rich-content p{margin:0 0 6px}
.qtext p:last-child, #correctAnswer p:last-child, #explanationText p:last-child,
#simCorrectAnswer p:last-child, #simExplanationText p:last-child, .rich-content p:last-child{margin-bottom:0}
/* 後台 RichEditor(Trix)插圖時會自動加檔名+檔案大小的說明文字(.attachment__caption),
   後台編輯時方便管理者辨識檔案,但前台不需要顯示給學生看 */
.qtext .attachment__caption, #correctAnswer .attachment__caption, #explanationText .attachment__caption,
#simCorrectAnswer .attachment__caption, #simExplanationText .attachment__caption,
.node-practice-item .attachment__caption, .rich-content .attachment__caption{display:none}
.opts{display:grid;gap:8px}
.opt{
  text-align:left;background:#FAFBFC;border:1.5px solid var(--line);border-radius:10px;
  padding:11px 14px;font-size:14px;display:flex;gap:10px;align-items:center;transition:border-color .12s;
}
.opt:hover{border-color:var(--primary)}
.opt .abc{font-weight:700;color:var(--pencil)}
.opt.correct{border-color:var(--green);background:var(--green-soft)}
.opt.correct .abc{color:var(--green)}
.opt.wrong{border-color:var(--red);background:var(--red-soft);position:relative}
.opt.wrong::after{content:'✗';position:absolute;right:14px;color:var(--red);font-weight:900;font-size:17px}
.feedback{display:none;margin-top:14px;border-top:1px solid var(--line);padding-top:14px}
.feedback.show{display:block}
.feedback .fb-title{font-weight:700;color:var(--red);font-size:14px;margin-bottom:6px}
.feedback p{font-size:13.5px;color:var(--ink-soft);margin-bottom:12px}
.fb-actions{display:flex;gap:8px;flex-wrap:wrap}

/* ===== 錯題複習 ===== */
.review-head{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:24px}
.review-head .card{text-align:center;padding:18px}
.review-head b{font-size:30px;display:block;line-height:1.25;font-weight:900}
.review-head .warn b{color:var(--red)}
.review-head span{font-size:12px;color:var(--pencil);letter-spacing:.05em}
.rq{display:grid;grid-template-columns:1fr auto;gap:14px;align-items:center;margin-bottom:10px}
.rq .meta{display:flex;gap:8px;margin-bottom:6px;flex-wrap:wrap;align-items:center}
.rq .meta small{color:var(--pencil);font-size:12px}
.rq .q{font-size:14.5px;font-weight:500}
.sm2{font-size:11.5px;color:var(--pencil);text-align:right;line-height:1.6}
.sm2 b{color:var(--ink)}

/* ===== 模考中心 ===== */
.mock-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-bottom:30px}
.mock-card{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:20px;position:relative}
.mock-card h4{font-size:16.5px;margin-bottom:6px;font-weight:700}
.mock-card .score-circle{position:absolute;top:16px;right:20px;font-weight:900;font-size:22px;color:var(--primary)}
.mock-meta{font-size:12.5px;color:var(--pencil);margin-bottom:12px;line-height:1.8}
.mock-meta b{color:var(--ink)}

/* ===== 弱點報告:知識點影片/練習題 ===== */
.node-row{display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:13.5px;margin-bottom:5px}
.node-row .node-name{display:flex;align-items:center;gap:5px}
.node-tool{
  display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;
  border:none;background:none;padding:0;color:var(--pencil);border-radius:4px;
}
.node-tool:hover{color:var(--primary)}
.node-tool svg{width:15px;height:15px}

.node-modal{position:fixed;inset:0;z-index:60;display:flex;align-items:center;justify-content:center;padding:20px}
.node-modal-backdrop{position:absolute;inset:0;background:rgba(30,40,50,.55)}
.node-modal-panel{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:26px;width:100%;max-height:85vh;overflow-y:auto;box-shadow:0 16px 48px rgba(10,30,50,.22);
}
.node-modal-close{
  position:absolute;top:14px;right:16px;background:none;border:none;
  font-size:20px;line-height:1;cursor:pointer;color:var(--pencil);
}
.node-modal-close:hover{color:var(--primary)}
.node-practice-item{padding-bottom:18px;margin-bottom:18px;border-bottom:1px solid var(--line)}
.node-practice-item:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}

/* 練習卷弱點報告頁的「重點整理圖」網格縮圖(見 report.blade.php),固定一行兩張
   (桌機/手機都是 2 欄,圖片本身通常是完整版面截圖,欄數太多縮圖會太小看不清楚);
   縮圖用 aspect-ratio 固定成正方形裁切,避免不同比例的圖片讓網格高低不齊、版面亂掉 */
.summary-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.summary-thumb{
  position:relative;aspect-ratio:1;border:1px solid var(--line);border-radius:10px;
  overflow:hidden;padding:0;background:var(--paper-line);cursor:pointer;
}
.summary-thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .15s}
.summary-thumb:hover img{transform:scale(1.04)}
.summary-thumb:hover{border-color:var(--primary)}

/* 燈箱:圖片本身用 object-fit:contain 完整顯示不裁切(縮圖是預覽用裁切成正方形,
   燈箱是要看清楚內容,兩者取捨不同),左右箭頭固定在圖片兩側,手機版收窄箭頭點擊區 */
.summary-modal-panel{max-width:900px;padding:16px;background:transparent;border:none;box-shadow:none}
.summary-modal-body{position:relative;display:flex;align-items:center;justify-content:center}
.summary-modal-body img{max-width:100%;max-height:78vh;object-fit:contain;border-radius:8px;background:#fff}
.summary-nav{
  position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;
  border-radius:99px;border:none;background:rgba(255,255,255,.9);color:var(--ink);
  font-size:26px;line-height:1;cursor:pointer;box-shadow:0 4px 12px rgba(10,30,50,.18);
}
.summary-nav:hover{background:#fff;color:var(--primary)}
.summary-nav-prev{left:-8px}
.summary-nav-next{right:-8px}
.summary-modal-counter{text-align:center;color:#fff;font-size:13px;margin-top:10px}
.summary-modal-panel .node-modal-close{
  /* 原本用負值(-6px)想讓叉叉浮出面板邊緣,但 .node-modal-panel 有 overflow-y:auto,
     超出容器邊界的部分會被裁掉,叉叉因此被切到一半;改成貼齊容器內側同樣達到
     「浮在圖片右上角」的視覺效果,又不會被裁切。尺寸/陰影對齊左右箭頭(.summary-nav)
     的規格,原本 32px+20px 字體點擊區偏小、視覺不夠明顯,放大到 44px+26px 更好點 */
  top:6px;right:6px;background:rgba(255,255,255,.9);border-radius:99px;
  width:44px;height:44px;display:flex;align-items:center;justify-content:center;
  font-size:26px;box-shadow:0 4px 12px rgba(10,30,50,.18);
}

footer{border-top:1px solid var(--line);padding:26px 20px;text-align:center;font-size:12px;color:var(--pencil);background:var(--paper-line)}

/* ===== 登入/註冊 ===== */
.auth-wrap{max-width:400px;margin:56px auto;padding:0 20px}
.auth-card{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:32px;box-shadow:0 4px 20px rgba(20,60,90,.06)}
.auth-field{margin-bottom:16px}
.auth-field label{display:block;font-size:13px;font-weight:700;color:var(--ink-soft);margin-bottom:6px}
.auth-field input[type=text],
.auth-field input[type=email],
.auth-field input[type=password]{
  width:100%;border:1.5px solid var(--line);border-radius:8px;padding:11px 14px;
  font-size:14px;font-family:var(--sans);background:#FAFBFC;
}
.auth-field input:focus{outline:none;border-color:var(--primary)}
.auth-error{color:var(--red);font-size:12.5px;margin-top:5px}
.auth-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;font-size:13px}
.auth-row label{display:flex;align-items:center;gap:6px;color:var(--ink-soft);cursor:pointer}
.auth-row a{color:var(--ink-soft);text-decoration:underline}
.auth-divider{display:flex;align-items:center;gap:12px;margin:22px 0;color:var(--pencil);font-size:12px}
.auth-divider::before,.auth-divider::after{content:'';flex:1;height:1px;background:var(--line)}
.auth-sso-list{display:grid;gap:10px}
.auth-sso-list .sso{width:100%;justify-content:center;padding:11px 14px;font-size:14px}
.auth-footer{text-align:center;font-size:13px;color:var(--pencil);margin-top:22px}
.auth-footer a{color:var(--primary);font-weight:700;text-decoration:none}
.auth-status{background:var(--primary-soft);color:var(--primary-dark);border-radius:8px;padding:10px 14px;font-size:13px;margin-bottom:18px}

/* ===== 首頁 Banner ===== */
.home-banner{
  position:relative;overflow:hidden;
  background:linear-gradient(120deg,#0084B8 0%,#00A3E0 55%,#3FC6F0 100%);
  color:#fff;padding:64px 20px 76px;
}
.home-banner::before,.home-banner::after{
  content:'';position:absolute;border-radius:50%;background:rgba(255,255,255,.10);pointer-events:none;
}
.home-banner::before{width:420px;height:420px;top:-160px;right:-100px}
.home-banner::after{width:260px;height:260px;bottom:-140px;left:8%}
.home-banner-inner{max-width:1080px;margin:0 auto;position:relative;z-index:1}
.home-banner .eyebrow{color:#EAFBFF;display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.14);padding:6px 14px;border-radius:99px;letter-spacing:.08em;margin-bottom:18px}
.home-banner h1{font-weight:900;font-size:clamp(30px,4.6vw,46px);line-height:1.35;letter-spacing:.01em;max-width:16ch}
.home-banner h1 em{font-style:normal;color:#FFE9A8}
.home-banner p{margin-top:16px;font-size:16px;color:rgba(255,255,255,.88);max-width:46ch;line-height:1.8}
.home-banner-cta{margin-top:30px;display:flex;gap:12px;flex-wrap:wrap}
.home-banner .btn-white{background:#fff;color:var(--primary-dark);box-shadow:0 8px 22px rgba(0,30,50,.18)}
.home-banner .btn-white:hover{background:#F3FBFF}
.home-banner .btn-outline{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.55)}
.home-banner .btn-outline:hover{background:rgba(255,255,255,.12);border-color:#fff}
.home-banner-stats{display:flex;gap:34px;margin-top:44px;flex-wrap:wrap}
.home-banner-stats b{display:block;font-size:26px;font-weight:900}
.home-banner-img{display:none}
@media (min-width:961px){
  /* 電腦板才顯示;手機/平板寬度優先保留文字與 CTA 空間,不擠版面 */
  .home-banner-img{
    display:block;position:absolute;right:20px;top:50%;transform:translateY(-50%);
    width:460px;height:600px;object-fit:cover;border-radius:50%;
    border:6px solid rgba(255,255,255,.35);box-shadow:0 20px 50px rgba(0,30,50,.28);
  }
}
.home-banner-stats span{font-size:12.5px;color:rgba(255,255,255,.78);letter-spacing:.04em}

/* ===== 首頁 課程/心得區塊 ===== */
.home-section{max-width:1080px;margin:0 auto;padding:56px 20px}
.home-section-head{display:flex;justify-content:space-between;align-items:flex-end;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.home-section-head .eyebrow{margin-bottom:6px}
.home-section-head h2{font-size:24px;font-weight:900;letter-spacing:.01em}

.track-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:12px}
.track-card{
  position:relative;background:var(--white);border:1px solid var(--line);border-radius:18px;
  padding:28px;text-decoration:none;overflow:hidden;
  transition:border-color .15s,transform .15s,box-shadow .15s;
}
.track-card:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(0,90,140,.12);border-color:var(--primary)}
.track-card .track-icon{
  width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  font-size:22px;margin-bottom:16px;
}
.track-card.exam .track-icon{background:var(--primary-soft);color:var(--primary-dark)}
.track-card.sprint .track-icon{background:var(--red-soft);color:var(--red)}
.track-card b{display:block;font-size:19px;font-weight:800;margin-bottom:8px}
.track-card p{color:var(--pencil);font-size:13.5px;line-height:1.75;margin-bottom:18px}
.track-card .track-cta{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:700;color:var(--primary-dark)}
.track-card .track-cta svg{width:15px;height:15px;transition:transform .15s}
.track-card:hover .track-cta svg{transform:translateX(3px)}

.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.course-card{
  display:flex;flex-direction:column;background:var(--white);border:1px solid var(--line);
  border-radius:16px;overflow:hidden;text-decoration:none;
  transition:transform .15s,box-shadow .15s,border-color .15s;
}
.course-card:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(0,90,140,.12);border-color:var(--primary)}
.course-card-cover{
  height:140px;position:relative;display:flex;align-items:flex-start;justify-content:space-between;padding:14px 16px;
  background:linear-gradient(135deg,var(--primary) 0%,#3FC6F0 100%);
  background-size:cover;background-position:center;
}
.course-card-cover.sprint{background:linear-gradient(135deg,#FF8A65 0%,var(--red) 100%);background-size:cover;background-position:center}
.course-card-cover::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(0,0,0,.18) 0%,transparent 40%);pointer-events:none;
}
.course-card-cover .tag{position:relative;z-index:1}
.course-card-cover .tag{background:rgba(255,255,255,.92)}
.course-card-cover .course-subject{
  align-self:flex-end;color:#fff;font-weight:800;font-size:15px;letter-spacing:.02em;
}
.course-card-body{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1}
.course-card-body b{font-size:15.5px;font-weight:700;line-height:1.5;margin-bottom:10px}
.course-card-meta{display:flex;gap:10px;font-size:12px;color:var(--pencil);margin-bottom:16px;flex-wrap:wrap}
.course-card-meta span{display:inline-flex;align-items:center;gap:4px}
.course-card-foot{margin-top:auto;display:flex;align-items:baseline;justify-content:space-between}
.course-card-foot .price-now{font-size:22px}
.course-card-foot .price-was{font-size:12.5px}

.testimonial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.testimonial-card{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:24px}
.testimonial-stars{color:var(--gold);font-size:14px;letter-spacing:2px;margin-bottom:14px}
.testimonial-card p{font-size:14px;color:var(--ink-soft);line-height:1.85;margin-bottom:20px;min-height:105px}
.testimonial-person{display:flex;align-items:center;gap:12px}
.testimonial-avatar{
  width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:800;font-size:15px;flex-shrink:0;
}
.testimonial-person b{display:block;font-size:13.5px;font-weight:700}
.testimonial-person span{font-size:12px;color:var(--pencil)}

.home-cta-band{
  background:var(--ink);color:#fff;border-radius:20px;padding:44px 36px;
  display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;
}
.home-cta-band h3{font-size:22px;font-weight:900;margin-bottom:6px}
.home-cta-band p{color:rgba(255,255,255,.72);font-size:14px}

/* ===== RWD ===== */
@media (max-width:860px){
  .hero{grid-template-columns:1fr;gap:30px;padding-top:26px}
  .learn-grid{grid-template-columns:1fr}
  .report-demo{grid-template-columns:1fr}
  .flow{grid-template-columns:repeat(2,1fr)}
  .trust-strip{grid-template-columns:1fr}
  .mock-grid{grid-template-columns:1fr}
  .review-head{grid-template-columns:1fr 1fr 1fr;gap:8px}
  .chapter{grid-template-columns:34px 1fr auto}
  .chapter > div:empty{display:none}
  .ch-mastery{display:none}
  .mastery-summary{margin-left:0}
  .track-grid,.course-grid,.testimonial-grid{grid-template-columns:1fr}
  .home-banner{padding:48px 20px 56px}
  .home-banner-stats{gap:22px}
  .home-cta-band{padding:30px 24px;text-align:center;justify-content:center}

  /* 導覽+登出收合成漢堡選單:.nav-menu 預設隱藏,點漢堡按鈕展開成整寬下拉;
     .nav-account(暱稱,或未登入時的登入/註冊)不受影響,維持一直顯示在右上角,
     漢堡按鈕排在暱稱右邊、最靠右側。登出改用手機專用的 .nav-logout-mobile
     (跟著選單收合展開),桌機版的 .nav-logout-desktop 隱藏,避免同一按鈕
     在兩種佈局間互相遷就 */
  /* 手機版 .nav-menu 收合時不吃 flex 空間,改由 .nav-account 自己 margin-left:auto
     把「暱稱 + 漢堡」一起推到最右邊(桌機版是靠 .nav-menu{flex:1} 撐開,見上方桌機規則) */
  .nav-account{margin-left:auto}
  .nav-burger{display:flex}
  .nav-menu{
    display:none;order:10;flex-basis:100%;margin-top:10px;
    border-top:1px solid var(--line);padding-top:10px;
  }
  .nav-menu.is-open{display:block}
  .nav-tabs{flex-direction:column;gap:2px}
  .nav-tab{width:100%}
  .nav-logout-desktop{display:none}
  .nav-logout-mobile{display:block;margin-top:8px}

  /* 手機版練習卷左側題號列表(qNavCard)改成從左側滑出的固定抽屜,不佔版面寬度——
     單純上下堆疊會把題號列表整塊擠在題目上方,使用者要滑過一長串題號(如 24 題模考卷)
     才看得到題目本身;改成抽屜後題目區塊可以直接佔滿全寬,列表只在需要時才滑出遮住畫面。
     .worksheet-layout 桌機版是 grid 兩欄(150px + 1fr,inline style 設定),手機版強制
     改成單欄,qNavCard 抽屜用 fixed 定位飄在最上層、不吃版面空間 */
  .worksheet-layout{grid-template-columns:1fr !important}
  .qnav-drawer{
    position:fixed !important;top:0;left:0;bottom:0;width:82vw;max-width:320px;
    max-height:none !important;z-index:200;border-radius:0;
    transform:translateX(-100%);transition:transform .2s ease;
  }
  .qnav-drawer.is-open{transform:translateX(0)}
  .qnav-drawer #qNav{max-height:none}
  .qnav-toggle{display:flex}
  .qnav-toggle-label{display:none}
  .qnav-open-btn{
    display:flex;align-items:center;gap:4px;margin-bottom:14px;
    background:var(--white);border:1px solid var(--line);border-radius:8px;
    padding:8px 14px;font-size:13px;color:var(--ink);cursor:pointer;
  }
  .qnav-overlay{
    display:none;position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:190;
  }
  .qnav-overlay.is-open{display:block}

  /* 重點整理圖手機版:欄數已固定 2 欄(見上方 .summary-grid,桌機/手機一致),
     這裡只需調整燈箱箭頭改貼齊畫面邊緣、縮小尺寸,避免在窄螢幕上遮住圖片內容 */
  .summary-nav{width:36px;height:36px;font-size:20px}
  .summary-nav-prev{left:2px}
  .summary-nav-next{right:2px}
}
@media (min-width:861px){
  /* 桌機版這兩個手機專屬元素一律不出現,避免萬一 CSS 載入順序異常時意外露出 */
  .qnav-open-btn,.qnav-overlay{display:none !important}
}
@media (max-width:600px){
  .course-grid{grid-template-columns:1fr}
}
@media (max-width:480px){
  /* 手機直向:改成上下堆疊,狀態圖示+標題一行,操作按鈕獨立一行撐滿寬度,
     避免 grid auto 欄位被按鈕文字(例如「付費解鎖」)撐窄擠壓成直排文字 */
  .chapter{display:flex;flex-wrap:wrap;gap:8px 14px}
  .chapter .ch-status{order:1}
  .chapter .ch-name{order:2;flex:1;min-width:0}
  .chapter > a.btn,
  .chapter > button.btn,
  .chapter > div:not(.ch-status):not(.ch-name):not(:empty){
    order:3;width:100%;
  }
  .chapter > div:not(.ch-status):not(.ch-name):not(:empty) .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}
:focus-visible{outline:2.5px solid var(--primary);outline-offset:2px}