/* ==========================================================================
   BT.Panel 授权柜台 · 内页样式（订单查询 / 更换 IP / 订单状态 / 知识库）
   依赖 base.css（变量、顶栏、表单、按钮、页脚）
   ========================================================================== */

.page { max-width: var(--wrap); margin: 0 auto; padding: 20px 32px 96px; }
.page-head { max-width: 760px; }
.back {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 14px; font-weight: 650; color: var(--ink-2); text-decoration: none;
  border-bottom: 2px solid var(--line-2); padding-bottom: 1px; transition: color .15s, border-color .15s;
}
.back:hover { color: var(--ink); border-color: var(--brand); }
.page-title { margin: 20px 0 0; font-size: clamp(36px, 5vw, 56px); line-height: 1.12; font-weight: 800; letter-spacing: -.03em; text-wrap: balance; }
.page-title mark { color: inherit; background: linear-gradient(176deg, transparent 54%, var(--yellow) 54%, var(--yellow) 90%, transparent 90%); padding: 0 .05em; margin: 0 -.05em; }
.page-lead { margin: 14px 0 0; font-size: 18px; line-height: 1.7; color: var(--ink-2); max-width: 620px; }
.page-lead b { color: var(--brand); font-weight: 800; }

.layout { margin-top: 40px; display: grid; grid-template-columns: minmax(0, 620px) minmax(0, 1fr); gap: 56px; align-items: start; }
.layout.is-center { grid-template-columns: minmax(0, 620px); justify-content: center; }
.layout.is-center .side { display: none; }

/* ───────────── 小票卡片 ───────────── */
.ticket-wrap { position: relative; filter: drop-shadow(0 1px 1px rgba(60, 40, 10, .06)) drop-shadow(0 18px 30px rgba(70, 48, 14, .12)); }
.ticket { position: relative; background: var(--card); padding: 28px 28px 26px; }
.ticket::before, .ticket::after { content: ''; position: absolute; left: 0; right: 0; height: 9px; background-size: 14px 9px; background-repeat: repeat-x; }
.ticket::before { top: -9px; background-image: radial-gradient(circle at 50% 0, transparent 6px, var(--card) 6.5px); }
.ticket::after { bottom: -9px; background-image: radial-gradient(circle at 50% 100%, transparent 6px, var(--card) 6.5px); }
@media (prefers-reduced-motion: no-preference) { .ticket-wrap { animation: feed .75s .05s var(--ease) both; } }

.ticket-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding-bottom: 16px; border-bottom: 2px dashed var(--line); }
.ticket-title { margin: 0; font-size: 22px; font-weight: 800; letter-spacing: .06em; }
.ticket-sub { margin: 0; font: 500 12px var(--f-mono); color: var(--ink-3); }
.ticket-note { margin: 16px 0 0; font-size: 15px; color: var(--ink-2); }
.ticket-foot { margin-top: 22px; padding-top: 14px; border-top: 2px dashed var(--line); display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; font-size: 13.5px; }
.ticket-foot a { display: inline-flex; align-items: center; gap: 4px; color: var(--ink-2); font-weight: 600; text-decoration: none; }
.ticket-foot a:hover { color: var(--brand-d); text-decoration: underline; }

/* ───────────── 表单 ───────────── */
.f-group { margin-top: 20px; }
.f-group:first-of-type { margin-top: 18px; }
.f-group .field { font-size: 16px; }
.step-label { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; font-size: 16px; font-weight: 750; }
.step-no {
  width: 26px; height: 26px; flex-shrink: 0; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--brand); color: #fff; font-size: 13px; font-weight: 800;
}
.or-line { display: flex; align-items: center; gap: 12px; margin: 20px 0 0; color: var(--ink-3); font-size: 13px; font-weight: 700; letter-spacing: .2em; }
.or-line::before, .or-line::after { content: ''; flex: 1; border-top: 2px dashed var(--line); }
.f-submit { margin-top: 24px; }
.f-saved { margin-top: 18px; padding: 14px; border-radius: var(--r); background: var(--blue-soft); }
.f-saved label { display: flex; align-items: center; gap: 6px; margin-bottom: 8px; font-size: 14px; font-weight: 700; color: var(--blue); }
.f-saved select.field { font: 500 15px/1.5 var(--f-sans); padding-right: 10px; }
.field.pw-in { letter-spacing: .1em; }
.page .alert { margin-top: 18px; }

/* ───────────── 订单记录 / 回执行 ───────────── */
.order { margin-top: 22px; padding: 18px 18px 16px; border: 2px solid var(--ink); border-radius: var(--r); background: #FFFDF8; }
.order + .order { margin-top: 16px; }
.order-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; padding-bottom: 12px; border-bottom: 2px dashed var(--line); }
.order-no { font: 700 15px var(--f-mono); color: var(--brand-d); word-break: break-all; }
.rows { margin: 0; padding: 0; }
.row { display: flex; justify-content: space-between; align-items: baseline; gap: 18px; padding: 11px 0; border-bottom: 1px dashed var(--line); font-size: 15px; }
.row:last-child { border-bottom: 0; }
.row .k { color: var(--ink-3); font-size: 14px; font-weight: 600; flex-shrink: 0; }
.row .v { text-align: right; font-weight: 650; min-width: 0; overflow-wrap: anywhere; }
.row .v.mono { font-family: var(--f-mono); font-weight: 600; }
.row .v small { display: block; font: 600 13px/1.6 var(--f-mono); color: var(--ink-2); }
.row .v small b { color: var(--ink); }
.row .v.is-go { color: var(--go-d); }
.row .v.is-dim { color: var(--ink-2); font-weight: 600; }
.row .v.price { font-size: 17px; font-weight: 800; }
.actions { margin-top: 14px; display: flex; gap: 10px; flex-wrap: wrap; }

.chip { display: inline-flex; align-items: center; gap: 5px; padding: 3px 11px; border-radius: 999px; font-size: 13.5px; font-weight: 750; white-space: nowrap; }
.chip::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.chip-go { background: var(--go-soft); color: var(--go-d); }
.chip-wait { background: var(--blue-soft); color: var(--blue); }
.chip-warn { background: var(--warn-soft); color: #9A5200; }
.chip-bad { background: var(--brand-soft); color: var(--brand-d); }

.btn-line {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; flex: 1 1 auto;
  min-height: 44px; padding: 0 16px;
  border: 2px solid var(--ink); border-radius: 10px; background: none; color: var(--ink);
  font-size: 15px; font-weight: 750; text-decoration: none; transition: background .15s, color .15s, transform .12s;
}
.btn-line:hover:not(:disabled) { background: var(--ink); color: #fff; }
.btn-line:active:not(:disabled) { transform: translateY(2px); }
.btn-line:disabled { opacity: .5; cursor: not-allowed; }
.btn-line.is-brand { border-color: var(--brand); color: var(--brand-d); }
.btn-line.is-brand:hover:not(:disabled) { background: var(--brand); color: #fff; }
.btn-text { color: var(--ink-2); font-size: 14px; font-weight: 600; }

.empty { margin-top: 22px; padding: 22px 16px; text-align: center; border: 2px dashed var(--line-2); border-radius: var(--r); }
.empty i { font-size: 34px; color: var(--ink-3); }
.empty b { display: block; margin-top: 6px; font-size: 17px; }
.empty p { margin: 6px 0 0; font-size: 14px; color: var(--ink-2); }

/* ───────────── 订单状态：大印章 ───────────── */
.verdict { display: flex; align-items: center; gap: 18px; margin-top: 20px; }
.verdict-ic {
  width: 76px; height: 76px; flex-shrink: 0; border-radius: 50%;
  display: grid; place-items: center; font-size: 38px;
  border: 3px solid currentColor; transform: rotate(-8deg);
  filter: url(#ink);
}
.verdict.is-go .verdict-ic { color: var(--go); background: var(--go-soft); }
.verdict.is-wait .verdict-ic { color: var(--blue); background: var(--blue-soft); }
.verdict.is-warn .verdict-ic { color: var(--warn); background: var(--warn-soft); }
.verdict.is-bad .verdict-ic { color: var(--brand); background: var(--brand-soft); }
.verdict.is-wait .verdict-ic i { animation: spin 2s linear infinite; }
.verdict h2 { margin: 0; font-size: 28px; font-weight: 800; letter-spacing: -.01em; line-height: 1.2; }
.verdict p { margin: 4px 0 0; font-size: 15px; color: var(--ink-2); }
.receipt-rows { margin-top: 18px; padding-top: 6px; border-top: 2px dashed var(--line); }
.loading-line { display: none; align-items: center; justify-content: center; gap: 8px; width: 100%; font-size: 13px; color: var(--ink-2); }
.loading-line .sp { width: 14px; height: 14px; border: 2.5px solid var(--line-2); border-top-color: var(--brand); border-radius: 50%; animation: spin .8s linear infinite; }

/* ───────────── 右侧小贴士 ───────────── */
.side { display: flex; flex-direction: column; gap: 12px; padding-top: 6px; }
.side-title { margin: 0 0 4px; font-size: 14px; font-weight: 800; letter-spacing: .16em; color: var(--ink-3); }
.tip { background: var(--card); border-radius: var(--r); padding: 16px 18px; border: 2px solid transparent; transition: border-color .2s; }
.tip:hover { border-color: var(--ink); }
.tip h3 { margin: 0; display: flex; align-items: center; gap: 8px; font-size: 16.5px; font-weight: 800; }
.tip h3 i { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; background: var(--yellow); font-size: 16px; }
.tip p { margin: 8px 0 0; font-size: 14.5px; line-height: 1.75; color: var(--ink-2); }
.tip-link { display: grid; grid-template-columns: 44px 1fr auto; align-items: center; gap: 14px; text-decoration: none; }
.tip-link .w-ic { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 50%; background: #F1ECE2; font-size: 20px; transition: background .18s; }
.tip-link b { display: block; font-size: 16.5px; font-weight: 750; line-height: 1.3; }
.tip-link small { display: block; font-size: 13px; color: var(--ink-2); }
.tip-link > i:last-child { font-size: 20px; color: var(--ink-3); transition: transform .2s var(--ease); }
.tip-link:hover .w-ic { background: var(--yellow); }
.tip-link:hover > i:last-child { color: var(--ink); transform: translateX(3px); }

/* ───────────── 知识库：列表 ───────────── */
.lib-head { max-width: 760px; }
.search { margin-top: 26px; display: flex; gap: 10px; max-width: 640px; }
.search-box { position: relative; flex: 1; min-width: 0; }
.search-box i { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); font-size: 20px; color: var(--ink-3); pointer-events: none; }
.search-box .field { padding-left: 44px; font: 500 16px/1.5 var(--f-sans); height: 52px; }
.search .btn-go { flex-shrink: 0; height: 52px; }

.lib { margin-top: 40px; display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 48px; align-items: start; }
.cats { position: sticky; top: 20px; }
.cats h2 { margin: 0 0 10px; font-size: 14px; font-weight: 800; letter-spacing: .16em; color: var(--ink-3); }
.cat-list { display: flex; flex-direction: column; gap: 6px; }
.cat {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px 14px; border-radius: 10px; border: 2px solid transparent;
  background: var(--card); text-decoration: none; font-size: 15px; font-weight: 650; color: var(--ink-2);
  transition: border-color .15s, color .15s;
}
.cat:hover { border-color: var(--line-2); color: var(--ink); }
.cat.active { background: var(--ink); color: #fff; }
.cat em { font: 700 12px var(--f-mono); font-style: normal; padding: 2px 8px; border-radius: 999px; background: #F1ECE2; color: var(--ink-2); }
.cat.active em { background: var(--yellow); color: var(--ink); }
.cats-install { margin-top: 18px; display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-radius: 10px; background: var(--blue-soft); text-decoration: none; font-size: 13.5px; line-height: 1.5; color: var(--ink-2); }
.cats-install strong { display: block; color: var(--blue); }
.cats-install > i:first-child { font-size: 22px; color: var(--blue); }
.cats-install > i:last-child { margin-left: auto; color: var(--ink-3); }

.results-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding-bottom: 12px; border-bottom: 2px solid var(--ink); }
.results-head h2 { margin: 0; font-size: 26px; font-weight: 800; }
.results-head span { font-size: 14px; color: var(--ink-3); font-weight: 600; }
.search-meta { margin-top: 14px; padding: 10px 14px; border-radius: 10px; background: var(--warn-soft); display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; font-size: 14px; color: #7A4300; }
.search-meta a { display: inline-flex; align-items: center; gap: 4px; font-weight: 700; color: #7A4300; }

.doc-list { margin-top: 14px; display: flex; flex-direction: column; gap: 12px; }
.doc { background: var(--card); border: 2px solid transparent; border-radius: var(--r); padding: 18px 20px 16px; transition: border-color .18s, transform .18s var(--ease); }
@media (hover: hover) { .doc:hover { border-color: var(--ink); transform: translateX(4px); } }
.doc-top { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; font-size: 13px; color: var(--ink-3); font-weight: 600; }
.doc-cat { display: inline-flex; align-items: center; gap: 4px; padding: 2px 10px; border-radius: 6px; background: var(--go-soft); color: var(--go-d); font-weight: 750; }
.doc-title { margin: 10px 0 0; font-size: 21px; line-height: 1.4; font-weight: 800; }
.doc-title a { text-decoration: none; }
.doc-title a:hover { color: var(--brand-d); }
.doc-desc { margin: 8px 0 0; font-size: 15px; line-height: 1.75; color: var(--ink-2); }
.doc-foot { margin-top: 14px; display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.doc-meta { display: flex; gap: 16px; font-size: 13px; color: var(--ink-3); }
.doc-meta i { margin-right: 3px; }
.doc-go { display: inline-flex; align-items: center; gap: 4px; font-size: 14.5px; font-weight: 800; color: var(--brand-d); text-decoration: none; }
.doc-go i { transition: transform .2s var(--ease); }
.doc-go:hover i { transform: translateX(4px); }

.pager { margin-top: 28px; display: flex; align-items: center; justify-content: center; gap: 8px; flex-wrap: wrap; }
.pager .nums { display: flex; gap: 6px; align-items: center; }
.pg { min-width: 42px; height: 42px; padding: 0 12px; display: inline-flex; align-items: center; justify-content: center; gap: 2px; border-radius: 10px; border: 2px solid var(--line-2); background: var(--card); font-size: 14.5px; font-weight: 750; text-decoration: none; transition: border-color .15s; }
.pg:hover { border-color: var(--ink); }
.pg.active { background: var(--ink); border-color: var(--ink); color: #fff; }
.pg-dots { color: var(--ink-3); padding: 0 2px; }

.cta {
  margin-top: 40px; padding: 26px 28px; border: 2px solid var(--ink); border-radius: var(--r);
  background: var(--yellow); box-shadow: 6px 6px 0 var(--ink);
  display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap;
}
.cta h2 { margin: 0; font-size: 26px; font-weight: 800; }
.cta p { margin: 6px 0 0; font-size: 15px; color: #3A3200; max-width: 460px; }
.cta .btn-go { width: auto; margin: 0; padding: 0 26px; height: 52px; font-size: 17px; }

/* ───────────── 知识库：文章 ───────────── */
.doc-page { max-width: 1120px; margin: 0 auto; padding: 8px 32px 96px; display: grid; grid-template-columns: minmax(0, 760px) 260px; gap: 56px; justify-content: center; align-items: start; }
.crumbs { display: flex; align-items: center; flex-wrap: wrap; gap: 4px; font-size: 13.5px; color: var(--ink-3); font-weight: 600; margin-bottom: 18px; }
.crumbs a { color: var(--ink-2); text-decoration: none; display: inline-flex; align-items: center; gap: 3px; }
.crumbs a:hover { color: var(--brand-d); text-decoration: underline; }
.crumbs .cur { color: var(--ink); }
.crumbs > i { font-size: 16px; }

.art-tags { display: flex; gap: 10px; flex-wrap: wrap; font-size: 13px; font-weight: 700; }
.art-tags .t1 { padding: 3px 11px; border-radius: 6px; background: var(--go-soft); color: var(--go-d); }
.art-tags .t2 { padding: 3px 11px; border-radius: 6px; background: #F1ECE2; color: var(--ink-2); }
.art-title { margin: 16px 0 0; font-size: clamp(30px, 4.4vw, 46px); line-height: 1.25; font-weight: 800; letter-spacing: -.02em; text-wrap: balance; }
.art-meta { margin-top: 16px; display: flex; gap: 18px; flex-wrap: wrap; font-size: 14px; color: var(--ink-3); font-weight: 550; }
.art-meta i { margin-right: 4px; }
.art-abstract { margin-top: 22px; padding: 16px 18px; border-radius: var(--r); background: var(--yellow); border: 2px solid var(--ink); display: flex; gap: 12px; font-size: 15.5px; line-height: 1.8; color: #2B2500; }
.art-abstract > i { font-size: 24px; flex-shrink: 0; margin-top: 2px; }

.prose { margin-top: 34px; font-size: 17px; line-height: 1.95; color: #2A2720; overflow-wrap: anywhere; }
.prose > :first-child { margin-top: 0; }
.prose h1, .prose h2, .prose h3, .prose h4 { color: var(--ink); line-height: 1.4; font-weight: 800; scroll-margin-top: 20px; }
.prose h2 { margin: 2.2em 0 .7em; font-size: 28px; padding-left: 14px; border-left: 8px solid var(--yellow); }
.prose h3 { margin: 1.9em 0 .5em; font-size: 22px; }
.prose h4 { margin: 1.6em 0 .4em; font-size: 18px; }
.prose p { margin: 1em 0; }
.prose a { color: var(--brand-d); font-weight: 650; text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 2px; text-decoration-color: rgba(222, 55, 19, .35); }
.prose a:hover { text-decoration-color: var(--brand); }
.prose strong { color: var(--ink); font-weight: 800; }
.prose ul, .prose ol { margin: 1em 0; padding-left: 1.6em; }
.prose li { margin: .35em 0; padding-left: .2em; }
.prose li::marker { color: var(--brand); font-weight: 800; }
.prose img { max-width: 100%; height: auto; border-radius: 10px; border: 2px solid var(--ink); }
.prose hr { border: 0; border-top: 2px dashed var(--line-2); margin: 2.2em 0; }
.prose code { font: 600 .88em var(--f-mono); background: #F1ECE2; color: var(--brand-d); padding: 2px 6px; border-radius: 5px; }
.prose pre { margin: 1.3em 0; padding: 16px 18px; overflow-x: auto; background: #FFFDF8; border: 2px solid var(--ink); border-radius: var(--r); box-shadow: 4px 4px 0 var(--line-2); font-size: 14.5px; line-height: 1.7; }
.prose pre code { background: none; color: var(--ink); padding: 0; font-weight: 500; font-size: inherit; }
.prose blockquote { margin: 1.3em 0; padding: 12px 18px; border-left: 6px solid var(--warn); background: var(--warn-soft); border-radius: 0 var(--r) var(--r) 0; color: #5A3A00; }
.prose blockquote p { margin: .4em 0; }
.prose table { display: block; width: 100%; overflow-x: auto; border-collapse: collapse; margin: 1.3em 0; font-size: 15px; line-height: 1.6; }
.prose th, .prose td { padding: 10px 14px; border: 1px solid var(--line-2); text-align: left; vertical-align: top; }
.prose th { background: #F1ECE2; border-bottom: 2px solid var(--ink); font-weight: 800; white-space: nowrap; }

.sec-h { display: flex; align-items: center; gap: 10px; margin: 0 0 14px; font-size: 24px; font-weight: 800; }
.sec-h i { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: var(--yellow); font-size: 18px; }
.art-sec { margin-top: 46px; }

.qa { display: flex; flex-direction: column; gap: 10px; }
.qa details { background: var(--card); border-radius: var(--r); border: 2px solid transparent; transition: border-color .2s; }
.qa details[open] { border-color: var(--ink); }
.qa summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: 12px; padding: 15px 18px; font-size: 16.5px; font-weight: 750; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after { content: '\ea4e'; margin-left: auto; font: 400 22px/1 'remixicon'; color: var(--ink-3); transition: transform .25s var(--ease); }
.qa details[open] summary::after { transform: rotate(180deg); color: var(--brand); }
.q-ic { width: 26px; height: 26px; flex-shrink: 0; display: grid; place-items: center; border-radius: 50%; background: var(--brand-soft); color: var(--brand-d); font-size: 13px; font-weight: 800; }
.qa details[open] .q-ic { background: var(--brand-d); color: #fff; }
.qa .a { padding: 0 18px 16px 56px; font-size: 15px; line-height: 1.85; color: var(--ink-2); }
.qa .a p { margin: 0; }

.note { margin-top: 46px; padding: 20px 22px; border: 2px dashed var(--ink); border-radius: var(--r); background: #FFFDF8; }
.note-top { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.note-tag { display: inline-flex; align-items: center; gap: 4px; padding: 2px 10px; border-radius: 6px; background: var(--ink); color: #fff; font-size: 12.5px; font-weight: 700; letter-spacing: .04em; }
.note-title { font-size: 17px; font-weight: 800; }
.note p { margin: 10px 0 0; font-size: 14.5px; line-height: 1.8; color: var(--ink-2); }
.note-row { margin-top: 14px; display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
.note-feat { display: flex; gap: 6px 16px; flex-wrap: wrap; font-size: 13.5px; font-weight: 650; color: var(--ink-2); }
.note-feat i { color: var(--go); margin-right: 2px; }

.rel { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.rel a { display: flex; flex-direction: column; gap: 6px; padding: 14px 16px; background: var(--card); border: 2px solid transparent; border-radius: var(--r); text-decoration: none; transition: border-color .18s, transform .18s var(--ease); }
@media (hover: hover) { .rel a:hover { border-color: var(--ink); transform: translateY(-2px); } }
.rel .c { font-size: 12px; font-weight: 750; color: var(--go-d); }
.rel .t { margin: 0; font-size: 16px; line-height: 1.5; font-weight: 750; }
.rel .d { font-size: 12.5px; color: var(--ink-3); }
.art-bottom { margin-top: 38px; }

.toc-box { position: sticky; top: 20px; display: flex; flex-direction: column; gap: 14px; padding-top: 6px; }
.toc { padding: 16px 16px 12px; background: var(--card); border-radius: var(--r); max-height: calc(100vh - 140px); overflow-y: auto; }
.toc h2 { margin: 0 0 8px; font-size: 13px; font-weight: 800; letter-spacing: .16em; color: var(--ink-3); }
.toc ol { list-style: none; margin: 0; padding: 0; }
.toc a { display: block; padding: 6px 10px; border-left: 3px solid var(--line); font-size: 14px; line-height: 1.5; font-weight: 550; color: var(--ink-2); text-decoration: none; transition: color .15s, border-color .15s; }
.toc li.toc-subheading a { padding-left: 22px; font-size: 13.5px; }
.toc a:hover { color: var(--ink); border-color: var(--line-2); }
.toc a[aria-current] { color: var(--brand-d); font-weight: 800; border-color: var(--brand); background: var(--brand-soft); }
.toc-back { display: inline-flex; align-items: center; gap: 4px; font-size: 14px; font-weight: 650; color: var(--ink-2); text-decoration: none; }
.toc-back:hover { color: var(--brand-d); }

/* ───────────── 响应式 ───────────── */
@media (max-width: 1100px) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 36px; }
  .layout .ticket-wrap { max-width: 640px; }
  .side { max-width: 640px; }
  .doc-page { grid-template-columns: minmax(0, 1fr); gap: 0; max-width: 780px; }
  .toc-box { display: none; }
}
@media (max-width: 900px) {
  .lib { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .cats { position: static; }
  .cat-list { flex-direction: row; flex-wrap: wrap; }
  .cats-install { display: none; }
}
@media (max-width: 640px) {
  .page { padding: 12px 20px 72px; }
  .doc-page { padding: 4px 20px 72px; }
  .page-lead { font-size: 16px; }
  .layout { margin-top: 28px; }
  .ticket { padding: 24px 18px 20px; }
  .ticket-head { flex-direction: column; gap: 2px; }
  .search { flex-direction: column; }
  .search .btn-go { width: 100%; }
  .row { flex-direction: column; gap: 2px; align-items: flex-start; }
  .row .v { text-align: left; }
  .verdict-ic { width: 64px; height: 64px; font-size: 32px; }
  .verdict h2 { font-size: 23px; }
  .doc { padding: 16px; }
  .doc-title { font-size: 19px; }
  .prose { font-size: 16px; }
  .prose h2 { font-size: 23px; border-left-width: 6px; }
  .prose h3 { font-size: 19px; }
  .rel { grid-template-columns: 1fr; }
  .qa .a { padding-left: 18px; }
  .cta { padding: 20px; box-shadow: 4px 4px 0 var(--ink); }
  .cta .btn-go { width: 100%; }
}