/* 答案王 全站樣式（搭配 Bootstrap 4.3） */
:root {
    --ak-primary: #5b21b6;
    --ak-primary-2: #7c3aed;
    --ak-primary-soft: #f1ebfd;
    --ak-accent: #ef7d00;
    --ak-accent-2: #ff9a1f;
    --ak-bg: #f4f4f7;
    --ak-card: #ffffff;
    --ak-text: #1f2430;
    --ak-muted: #6b7280;
    --ak-border: #e6e6ee;
    --ak-success: #16a34a;
    --ak-radius: 12px;
    --ak-shadow: 0 1px 2px rgba(17, 12, 46, .04), 0 4px 16px rgba(17, 12, 46, .05);
}

html { scroll-behavior: smooth; }
body {
    background: var(--ak-bg);
    color: var(--ak-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", "Heiti TC", sans-serif;
    font-size: 15.5px;
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
a { color: var(--ak-primary); }
a:hover { color: var(--ak-primary-2); }
img { max-width: 100%; height: auto; }
mark { background: #fff1b8; padding: 0 2px; border-radius: 3px; }
.ak-main { flex: 1 0 auto; padding-bottom: 32px; }
.skip-link:focus { position: fixed; top: 8px; left: 8px; z-index: 2000; background: #fff; padding: 8px 12px; border-radius: 6px; }

/* ── 按鈕 ── */
.btn { border-radius: 8px; font-weight: 600; }
.btn-primary { background: var(--ak-primary); border-color: var(--ak-primary); }
.btn-primary:hover, .btn-primary:focus { background: var(--ak-primary-2); border-color: var(--ak-primary-2); }
.btn-primary:not(:disabled):not(.disabled):active { background: #4c1d95; border-color: #4c1d95; }
.btn-outline-primary { color: var(--ak-primary); border-color: var(--ak-primary); }
.btn-outline-primary:hover { background: var(--ak-primary); border-color: var(--ak-primary); }
.btn-accent { background: linear-gradient(135deg, var(--ak-accent), var(--ak-accent-2)); color: #fff; border: 0; box-shadow: 0 2px 8px rgba(239, 125, 0, .3); }
.btn-accent:hover, .btn-accent:focus { color: #fff; filter: brightness(1.05); box-shadow: 0 4px 12px rgba(239, 125, 0, .4); }
.btn-soft { background: var(--ak-primary-soft); color: var(--ak-primary); border: 0; }
.btn-soft:hover { background: #e4d8fb; color: var(--ak-primary); }
.btn-soft.is-active { background: var(--ak-primary); color: #fff; }
.form-control:focus { border-color: #a78bfa; box-shadow: 0 0 0 .2rem rgba(124, 58, 237, .15); }
.badge-soft { background: var(--ak-primary-soft); color: var(--ak-primary); }

/* ── 導覽列 ── */
.ak-header { background: #fff; box-shadow: 0 1px 0 var(--ak-border), 0 2px 12px rgba(0, 0, 0, .03); position: sticky; top: 0; z-index: 1030; }
.ak-header .navbar { padding-top: .45rem; padding-bottom: .45rem; }
.ak-brand { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 1.4rem; color: var(--ak-primary) !important; letter-spacing: .08em; }
.ak-header .nav-link { color: #3f3f4b !important; font-weight: 500; border-radius: 8px; padding: .45rem .7rem !important; white-space: nowrap; }
.ak-header .nav-link .fas, .ak-header .nav-link .fa { color: #9a93ad; margin-right: 2px; }
.ak-header .nav-item.active .nav-link { color: var(--ak-primary) !important; background: var(--ak-primary-soft); }
.ak-header .nav-item.active .nav-link .fas { color: var(--ak-primary); }
.ak-header .nav-link:hover { background: #f6f3fd; }
.ak-nav-search { position: relative; display: flex; margin: 0 .75rem; }
.ak-nav-search .form-control { border-radius: 999px; padding-right: 40px; background: #f4f3f8; border-color: transparent; min-width: 200px; }
.ak-nav-search .form-control:focus { background: #fff; }
.ak-nav-search .btn { position: absolute; right: 2px; top: 50%; transform: translateY(-50%); color: var(--ak-muted); }
.ak-ask-btn { white-space: nowrap; }
.ak-avatar { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 50%; background: linear-gradient(135deg, #8b5cf6, #5b21b6); color: #fff; font-weight: 700; flex: none; }
.ak-avatar-sm { width: 26px; height: 26px; font-size: 13px; margin-right: 4px; vertical-align: middle; }
.ak-avatar.is-anon { background: linear-gradient(135deg, #cbd5e1, #94a3b8); }
@media (max-width: 991.98px) {
    .ak-nav-search { margin: .5rem 0; }
    .ak-nav-search .form-control { min-width: 0; width: 100%; }
    .ak-nav-user .nav-item { margin: 2px 0; }
    .ak-ask-btn { display: block; margin: .4rem 0 .6rem; }
}
@media (min-width: 992px) and (max-width: 1199.98px) {
    .ak-header .nav-link .fas { display: none; }
    .ak-nav-search .form-control { min-width: 140px; }
}

/* ── 麵包屑 ── */
.ak-breadcrumb { background: transparent; padding: .9rem 0 .2rem; margin: 0; font-size: 14px; }
.ak-breadcrumb .breadcrumb-item.active { color: var(--ak-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 60vw; }

/* ── 卡片 / 區塊 ── */
.ak-card { background: var(--ak-card); border-radius: var(--ak-radius); box-shadow: var(--ak-shadow); padding: 20px; margin-bottom: 20px; border: 1px solid rgba(0, 0, 0, .02); }
.ak-card-title { font-size: 1.05rem; font-weight: 700; margin-bottom: 14px; color: var(--ak-text); }
.ak-card-title .fas, .ak-card-title .fa, .ak-card-title .far { color: var(--ak-accent); margin-right: 4px; }
.ak-section-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 26px 0 12px; flex-wrap: wrap; }
.ak-section-head h1, .ak-section-head h2 { font-size: 1.35rem; font-weight: 800; margin: 0; }
.ak-page-title { font-size: 1.5rem; font-weight: 800; margin: 18px 0 6px; }
.ak-page-sub { color: var(--ak-muted); margin-bottom: 16px; }
.ak-more { display: inline-block; margin-top: 8px; font-size: 14px; font-weight: 600; }
.ak-empty { text-align: center; padding: 48px 16px; color: var(--ak-muted); }
.ak-empty .far, .ak-empty .fas { font-size: 44px; color: #c4bdd6; margin-bottom: 12px; }

/* ── 首頁 Hero ── */
.ak-hero { background: radial-gradient(circle at 85% 10%, rgba(255, 154, 31, .35), transparent 40%), linear-gradient(135deg, #3b0f8f 0%, #5b21b6 45%, #7c3aed 100%); color: #fff; padding: 46px 0 54px; margin-bottom: 10px; position: relative; overflow: hidden; }
.ak-hero::after { content: "?"; position: absolute; right: 6%; bottom: -60px; font-size: 260px; font-weight: 900; color: rgba(255, 255, 255, .06); line-height: 1; }
.ak-hero h1 { font-size: 2.1rem; font-weight: 900; letter-spacing: .04em; margin-bottom: 8px; }
.ak-hero p { opacity: .9; font-size: 1.05rem; margin-bottom: 22px; }
.ak-hero-search { display: flex; background: #fff; border-radius: 999px; padding: 6px; max-width: 640px; box-shadow: 0 10px 30px rgba(20, 0, 60, .3); }
.ak-hero-search input { border: 0; flex: 1; padding: 8px 18px; font-size: 1.05rem; border-radius: 999px; outline: 0; min-width: 0; }
.ak-hero-search .btn { border-radius: 999px; padding: 8px 22px; }
.ak-hero-stats { display: flex; gap: 28px; margin-top: 22px; flex-wrap: wrap; }
.ak-hero-stats div { font-size: 14px; opacity: .9; }
.ak-hero-stats strong { display: block; font-size: 1.5rem; font-weight: 800; opacity: 1; }
.ak-hero-tags { margin-top: 14px; font-size: 14px; }
.ak-hero-tags a { color: #fff; background: rgba(255, 255, 255, .14); padding: 3px 12px; border-radius: 999px; margin: 0 6px 6px 0; display: inline-block; }
.ak-hero-tags a:hover { background: rgba(255, 255, 255, .25); text-decoration: none; }
@media (max-width: 575.98px) {
    .ak-hero { padding: 30px 0 36px; }
    .ak-hero h1 { font-size: 1.55rem; }
    .ak-hero-search .btn span { display: none; }
}

/* ── 分頁標籤 ── */
.ak-tabs { border-bottom: 0; gap: 6px; margin-bottom: 14px; flex-wrap: nowrap; overflow-x: auto; }
.ak-tabs .nav-link { border: 0; border-radius: 999px; color: var(--ak-muted); font-weight: 600; padding: .35rem 1rem; white-space: nowrap; }
.ak-tabs .nav-link.active { background: var(--ak-primary); color: #fff; }

/* ── 問題列表 ── */
.ak-q-list { display: flex; flex-direction: column; }
.ak-q-item { display: flex; gap: 14px; padding: 16px 4px; border-bottom: 1px solid var(--ak-border); align-items: flex-start; }
.ak-q-item:last-child { border-bottom: 0; }
.ak-q-stat { flex: none; width: 58px; text-align: center; border-radius: 10px; padding: 6px 0; background: #f4f3f8; color: var(--ak-muted); line-height: 1.2; }
.ak-q-stat strong { display: block; font-size: 1.15rem; color: #4b4b5a; }
.ak-q-stat span { font-size: 12px; }
.ak-q-stat.is-answered { background: #e9f8ef; color: var(--ak-success); }
.ak-q-stat.is-answered strong { color: var(--ak-success); }
.ak-q-body { flex: 1; min-width: 0; }
.ak-q-title { font-size: 1.05rem; font-weight: 700; margin: 0 0 4px; line-height: 1.5; }
.ak-q-title a { color: var(--ak-text); }
.ak-q-title a:hover { color: var(--ak-primary); }
.ak-q-excerpt { color: #5f6473; font-size: 14px; margin: 0 0 6px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.ak-q-meta { font-size: 13px; color: var(--ak-muted); display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.ak-q-thumb { flex: none; }
.ak-q-thumb img { width: 96px; height: 72px; object-fit: cover; border-radius: 8px; background: #eee; }
.ak-tag { background: var(--ak-primary-soft); color: var(--ak-primary); padding: 1px 10px; border-radius: 999px; font-weight: 600; font-size: 12.5px; }
.ak-tag:hover { text-decoration: none; background: #e4d8fb; }
@media (max-width: 575.98px) {
    .ak-q-stat { width: 48px; }
    .ak-q-thumb img { width: 72px; height: 56px; }
}

/* ── 側欄 ── */
.ak-link-list { padding-left: 1.2rem; margin: 0; }
.ak-link-list li { padding: 5px 0; border-bottom: 1px dashed var(--ak-border); line-height: 1.5; }
.ak-link-list li:last-child { border-bottom: 0; }
.ak-link-list a { color: var(--ak-text); font-size: 14.5px; }
.ak-link-list a:hover { color: var(--ak-primary); }
.ak-link-list small { display: block; font-size: 12px; }
.ak-ask-card { background: linear-gradient(135deg, #fff7ed, #fff); border: 1px solid #fde3c4; }
.ak-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.ak-chip { background: #f4f3f8; color: #444; padding: 4px 12px; border-radius: 999px; font-size: 14px; }
.ak-chip:hover { background: var(--ak-primary-soft); color: var(--ak-primary); text-decoration: none; }

/* ── 圖片橫向捲動 ── */
.ak-strip { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(160px, 1fr); gap: 12px; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 6px; }
.ak-strip a { scroll-snap-align: start; background: #fff; border-radius: 10px; overflow: hidden; box-shadow: var(--ak-shadow); color: var(--ak-text); }
.ak-strip a:hover { text-decoration: none; color: var(--ak-primary); }
.ak-strip img { width: 100%; height: 110px; object-fit: cover; background: #eee; display: block; }
.ak-strip span { display: block; padding: 8px 10px; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ── 分類頁 ── */
.ak-cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.ak-cat-box { background: #fff; border-radius: var(--ak-radius); box-shadow: var(--ak-shadow); padding: 16px 18px; scroll-margin-top: 80px; }
.ak-cat-box h3 { font-size: 1.05rem; font-weight: 800; margin-bottom: 10px; color: var(--ak-primary); }
.ak-cat-box ul { list-style: none; padding: 0; margin: 0; }
.ak-cat-box li { padding: 3px 0; }
.ak-cat-box a { color: #333; }
.ak-cat-box a:hover { color: var(--ak-primary); }
.ak-cat-box details summary { cursor: pointer; color: #333; list-style: none; }
.ak-cat-box details summary::-webkit-details-marker { display: none; }
.ak-cat-box details summary::before { content: "\25B8"; color: var(--ak-accent); margin-right: 6px; display: inline-block; transition: transform .15s; }
.ak-cat-box details[open] summary::before { transform: rotate(90deg); }
.ak-cat-box details ul { padding-left: 18px; font-size: 14px; }
.ak-cat-box:target { box-shadow: 0 0 0 3px var(--ak-accent-2); }

/* ── 問題內頁 ── */
.ak-question h1 { font-size: 1.5rem; font-weight: 800; line-height: 1.45; margin: 6px 0 10px; word-break: break-word; }
.ak-status { display: inline-block; font-size: 13px; font-weight: 700; padding: 2px 10px; border-radius: 999px; }
.ak-status.is-answered { background: #e9f8ef; color: var(--ak-success); }
.ak-status.is-open { background: #fff4e5; color: #c25e00; }
.ak-asker { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--ak-muted); flex-wrap: wrap; }
.ak-asker strong { color: var(--ak-text); }
.ak-content { font-size: 16px; word-break: break-word; overflow-wrap: anywhere; overflow: hidden; }
.ak-content img { border-radius: 8px; }
.ak-content table { max-width: 100%; display: block; overflow-x: auto; }
.ak-gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; margin: 14px 0; }
.ak-gallery a img { width: 100%; height: 150px; object-fit: cover; border-radius: 10px; background: #eee; }
.ak-gallery.is-single { grid-template-columns: 1fr; }
.ak-gallery.is-single a img { height: auto; max-height: 520px; object-fit: contain; background: #f7f7f9; }
.ak-actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; border-top: 1px solid var(--ak-border); padding-top: 14px; margin-top: 18px; }
.ak-share a, .ak-share button { width: 36px; height: 36px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; color: #fff; border: 0; margin-right: 4px; font-size: 16px; }
.ak-share .s-line { background: #06c755; }
.ak-share .s-fb { background: #1877f2; }
.ak-share .s-x { background: #111; }
.ak-share .s-copy { background: #6b7280; }
.ak-share a:hover { color: #fff; filter: brightness(1.1); }

.ak-answer { display: flex; gap: 12px; padding: 18px 0; border-bottom: 1px solid var(--ak-border); scroll-margin-top: 80px; }
.ak-answer:last-child { border-bottom: 0; }
.ak-answer:target { background: #fffbea; margin: 0 -12px; padding: 18px 12px; border-radius: 10px; }
.ak-answer-body { flex: 1; min-width: 0; }
.ak-answer-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 14px; color: var(--ak-muted); margin-bottom: 4px; }
.ak-answer-head strong { color: var(--ak-text); font-size: 15px; }
.ak-floor { background: #f4f3f8; border-radius: 6px; padding: 0 8px; font-size: 12px; }
.ak-best { background: #fff4e5; color: #c25e00; border-radius: 6px; padding: 0 8px; font-size: 12px; font-weight: 700; }
.ak-answer-text { font-size: 15.5px; word-break: break-word; overflow-wrap: anywhere; }
.ak-answer-tools { display: flex; gap: 8px; align-items: center; margin-top: 8px; font-size: 13px; }
.ak-answer-tools .btn { font-size: 13px; padding: 2px 12px; }
.ak-deleted { color: #9ca3af; font-style: italic; }
.ak-answer-form textarea { min-height: 130px; }

/* ── 表單頁 ── */
.ak-form-card { max-width: 760px; margin: 0 auto; }
.ak-form-card .form-group label { font-weight: 600; }
.ak-req { color: #dc2626; margin-left: 2px; }
.ak-note { background: #fff7ed; border-left: 4px solid var(--ak-accent); padding: 12px 16px; border-radius: 6px; font-size: 14px; color: #7a3e00; }
.ak-file-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 8px; margin-top: 8px; }
.ak-file-list img { width: 100%; height: 90px; object-fit: cover; border-radius: 8px; }
.ak-msg-icon { font-size: 40px; }
.ak-msg-text { font-size: 1.05rem; font-weight: 600; white-space: pre-line; }

/* ── 會員中心 ── */
.ak-member-menu .list-group-item { border: 0; padding: .75rem 1.1rem; color: #3f3f4b; }
.ak-member-menu .list-group-item.active { background: var(--ak-primary-soft); color: var(--ak-primary); font-weight: 700; border-left: 3px solid var(--ak-primary); }
.ak-member-menu .list-group-item:first-child { border-top-left-radius: var(--ak-radius); border-top-right-radius: var(--ak-radius); }
.ak-member-menu .list-group-item:last-child { border-bottom-left-radius: var(--ak-radius); border-bottom-right-radius: var(--ak-radius); }
.ak-msg-item { border-bottom: 1px solid var(--ak-border); padding: 14px 0; }
.ak-msg-item:last-child { border-bottom: 0; }
.ak-stat-tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 20px; }
.ak-stat-tiles div { background: #fff; border-radius: var(--ak-radius); box-shadow: var(--ak-shadow); padding: 14px 16px; }
.ak-stat-tiles strong { display: block; font-size: 1.5rem; color: var(--ak-primary); }
.ak-stat-tiles span { font-size: 13px; color: var(--ak-muted); }
.ak-table td, .ak-table th { vertical-align: middle; font-size: 14px; }
.ak-table .ak-cell-text { max-width: 420px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ── 內容頁 ── */
.ak-prose h2 { font-size: 1.2rem; font-weight: 800; margin-top: 1.6rem; }
.ak-prose h2:first-child { margin-top: 0; }
.ak-prose p, .ak-prose li { color: #3a3f4b; }
.ak-faq .card { border: 0; border-bottom: 1px solid var(--ak-border); border-radius: 0; }
.ak-faq .card-header { background: transparent; border: 0; font-weight: 700; cursor: pointer; padding: 14px 4px; }
.ak-faq .card-header::after { content: "+"; float: right; color: var(--ak-accent); font-size: 20px; line-height: 1; }
.ak-faq .card-header[aria-expanded="true"]::after { content: "−"; }
.ak-faq .card-body { padding: 0 4px 16px; color: #4b5060; }

/* ── 頁尾 ── */
.ak-footer { background: #1d1530; color: #c9c3d8; padding: 40px 0 20px; font-size: 14px; flex-shrink: 0; }
.ak-footer a { color: #e4dcf7; }
.ak-footer a:hover { color: #fff; }
.ak-footer-brand { display: flex; align-items: center; gap: 8px; font-size: 1.3rem; font-weight: 800; color: #fff; margin-bottom: 10px; }
.ak-footer-title { font-size: .95rem; color: #fff; font-weight: 700; margin-bottom: 10px; }
.ak-footer li { padding: 3px 0; }
.ak-friends { border-top: 1px solid rgba(255, 255, 255, .08); padding-top: 18px; margin-top: 6px; }
.ak-friends .list-inline-item { margin: 0 14px 6px 0; }
.ak-friends a { color: #b7aed0; }
.ak-copyright { border-top: 1px solid rgba(255, 255, 255, .08); margin-top: 18px; padding-top: 16px; text-align: center; color: #8e86a6; font-size: 13px; }

/* ── 回頂部 ── */
#back-to-top { position: fixed; bottom: 22px; right: 18px; z-index: 999; width: 44px; height: 44px; border-radius: 50%; background: var(--ak-primary); color: #fff; display: flex; align-items: center; justify-content: center; box-shadow: 0 6px 16px rgba(91, 33, 182, .35); opacity: 0; visibility: hidden; transition: opacity .2s, visibility .2s; }
#back-to-top.show { opacity: 1; visibility: visible; }
#back-to-top:hover { text-decoration: none; background: var(--ak-primary-2); }

/* ── 提示訊息 ── */
.ak-toast { position: fixed; left: 50%; top: 76px; transform: translateX(-50%); z-index: 2000; background: #1f2430; color: #fff; padding: 10px 20px; border-radius: 999px; font-size: 14.5px; box-shadow: 0 8px 24px rgba(0, 0, 0, .2); max-width: 92vw; text-align: center; }
.ak-toast.is-error { background: #dc2626; }
.ak-toast.is-ok { background: var(--ak-success); }

/* CKEditor 響應式 */
.cke { max-width: 100%; }
.cke_chrome { border-radius: 8px !important; overflow: hidden; }