:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --paper: #ffffff;
  --ink: #202733;
  --muted: #5e6673;
  --border: #d8dde5;
  --blue: #285f9e;
  --blue-soft: #edf4fb;
  --green: #25643d;
  --green-soft: #edf8f1;
  --amber: #7b4a00;
  --amber-soft: #fff5df;
  --red: #8d2f2f;
  --red-soft: #fff0f0;
  --radius: 14px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  font-size: 18px;
  line-height: 1.6;
}
a { color: var(--blue); }
button { font: inherit; }
.topbar { border-bottom: 1px solid var(--border); background: var(--paper); }
.topbar-inner, .accepted-files, .page-footer {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}
.topbar-inner {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.back-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 7px 14px;
  border: 2px solid var(--blue);
  border-radius: 10px;
  font-weight: 800;
  text-decoration: none;
}
.page-label { color: var(--muted); font-size: 0.95rem; font-weight: 700; }
.accepted-files { padding: 48px 0 64px; }
.intro { max-width: 850px; }
h1 {
  margin: 0 0 12px;
  font-size: clamp(2.25rem, 6vw, 3.25rem);
  line-height: 1.15;
}
.lead { margin: 0; color: var(--muted); font-size: 1.2rem; font-weight: 650; }
.en {
  display: block;
  margin-top: 0.18em;
  color: inherit;
  font-size: 0.9em;
  font-weight: 500;
  line-height: 1.45;
  opacity: 0.78;
  text-transform: none;
}
.chooser-open {
  min-height: 52px;
  margin-top: 22px;
  padding: 10px 22px;
  border: 2px solid var(--blue);
  border-radius: 12px;
  background: var(--blue);
  color: var(--paper);
  cursor: pointer;
  font-weight: 850;
  box-shadow: 0 5px 0 #1d4777;
}
.chooser-open:hover { background: #1f518a; }
.chooser-open:focus-visible, .chooser-close:focus-visible, .chooser-choice:focus-visible, .chooser-back:focus-visible, .situation-nav a:focus-visible, .situation-nav summary:focus-visible {
  outline: 4px solid #f0b429;
  outline-offset: 3px;
}
.chooser-panel {
  margin: 34px 0 58px;
  padding: 26px;
  border: 2px solid var(--blue);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: 0 12px 30px rgb(32 39 51 / 10%);
}
.chooser-panel[hidden], #cardsView[hidden], .page-footer[hidden], .chooser-open[hidden] { display: none; }
.chooser-panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}
.chooser-panel-head h2 { margin: 0; font-size: 1.65rem; }
.chooser-close, .chooser-back {
  min-height: 44px;
  border: 2px solid var(--blue);
  border-radius: 10px;
  background: var(--paper);
  color: var(--blue);
  cursor: pointer;
  font-weight: 800;
}
.chooser-close { padding: 7px 14px; }
.chooser-progress {
  margin: 18px 0 8px;
  color: var(--blue);
  font-weight: 850;
}
.chooser-question h3 { margin: 0 0 18px; font-size: 1.45rem; }
.chooser-choices {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.chooser-choice {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  gap: 2px 12px;
  min-height: 86px;
  padding: 15px;
  border: 2px solid var(--border);
  border-radius: 11px;
  background: #fafbfc;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
}
.chooser-choice:hover { border-color: var(--blue); background: var(--blue-soft); }
.chooser-choice strong { align-self: end; font-size: 1.08rem; }
.chooser-choice small { grid-column: 2; color: var(--muted); line-height: 1.35; }
.chooser-choice-tag {
  grid-row: 1 / span 2;
  align-self: center;
  min-width: 58px;
  padding: 7px 8px;
  border-radius: 8px;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 0.82rem;
  font-weight: 900;
  text-align: center;
}
.chooser-actions { margin-top: 18px; }
.chooser-back { padding: 7px 14px; }
.chooser-match {
  border-color: var(--blue);
  box-shadow: 0 0 0 6px rgb(40 95 158 / 20%), 0 14px 30px rgb(32 39 51 / 14%);
}
.accept-contract {
  margin: 34px 0 58px;
  padding: 24px;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  background: var(--paper);
}
.accept-contract h2 { margin: 0 0 18px; }
.contract-supported, .contract-legacy {
  margin: 14px 0 0;
  padding: 14px 16px;
  border-radius: 10px;
  font-weight: 750;
}
.contract-supported { margin-top: 0; background: var(--green-soft); color: var(--green); }
.contract-legacy { background: var(--blue-soft); color: #214f83; }
.proof-note {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 0.95rem;
}
.proof-link {
  align-self: flex-start;
  color: var(--blue);
  font-size: 0.9rem;
  font-weight: 650;
  text-underline-offset: 0.18em;
}
.endnote-link {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  margin-top: 12px;
  color: var(--red);
  font-size: 0.9rem;
  font-weight: 750;
}
.guide-layout {
  display: grid;
  grid-template-columns: minmax(230px, 280px) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}
.guide-layout.nav-is-closed {
  grid-template-columns: 0 minmax(0, 1fr);
  gap: 0;
}
.situation-nav {
  position: sticky;
  top: 20px;
  z-index: 10;
  max-height: calc(100vh - 40px);
  overflow: auto;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--paper);
}
.situation-nav > summary {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--paper);
  color: var(--blue);
  cursor: pointer;
  font-weight: 850;
  text-align: center;
}
.situation-nav > summary::marker { color: var(--blue); }
.nav-summary-closed { display: none; }
.situation-nav:not([open]) {
  width: 44px;
  overflow: visible;
  border: 0;
  background: transparent;
}
.situation-nav:not([open]) > summary {
  width: 44px;
  height: 154px;
  padding: 10px 8px;
  border: 2px solid var(--border);
  border-radius: 0 var(--radius) var(--radius) 0;
  writing-mode: vertical-rl;
}
.situation-nav:not([open]) .nav-summary-open { display: none; }
.situation-nav:not([open]) .nav-summary-closed { display: inline; }
.situation-nav-content { display: block; padding: 20px; }
.situation-nav-content > p { margin: 0 0 18px; color: var(--muted); font-size: 0.95rem; }
.nav-group + .nav-group { margin-top: 20px; }
.nav-group h2 {
  margin: 0 0 7px;
  color: var(--muted);
  font-size: 0.88rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.nav-group ol { margin: 0; padding-left: 1.7rem; }
.nav-group li { padding-left: 3px; }
.nav-group li + li { margin-top: 4px; }
.nav-group a {
  display: block;
  min-height: 44px;
  padding: 7px 9px;
  border-radius: 8px;
  color: var(--ink);
  font-size: 0.94rem;
  line-height: 1.35;
  text-decoration: none;
}
.nav-group a:hover { background: var(--blue-soft); color: var(--blue); }
.nav-group a[aria-current="page"] { background: var(--blue); color: var(--paper); font-weight: 800; }
.situation-content { min-width: 0; }
.guide-section[hidden], .accepted-file-card[hidden] { display: none; }
.section-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 20px;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--ink);
  font-size: 1.85rem;
  line-height: 1.25;
}
.section-title span { color: var(--muted); font-size: 1rem; }
.accepted-files-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: stretch;
}
.accepted-file-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  overflow: hidden;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--paper);
}
.accepted-file-card:focus { outline: 4px solid #f0b429; outline-offset: 4px; }
.card-head { padding: 20px 22px 0; }
.card-kicker {
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  margin-bottom: 8px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 0.85rem;
  font-weight: 850;
}
.card-head h3 { margin: 0; font-size: 1.38rem; line-height: 1.3; }
.real-run-slot {
  margin: 18px 22px 0;
  overflow: hidden;
  border: 2px solid #a9b4c2;
  border-radius: 11px;
  background: #f7f9fc;
}
.layout-sketch { display: block; width: 100%; min-height: 190px; background: #f7f9fc; }
.sketch-paper, .sketch-slide, .sketch-file { fill: #fff; stroke: #687587; stroke-width: 2; }
.sketch-grid { fill: #fff; stroke: #687587; stroke-width: 2; }
.sketch-grid-line { fill: none; stroke: #8b96a5; stroke-width: 2; }
.sketch-line, .sketch-muted { fill: #aab4c0; }
.sketch-zh { fill: #dceafa; stroke: #285f9e; stroke-width: 1; }
.sketch-en { fill: #dcf2e4; stroke: #25643d; stroke-width: 1; }
.sketch-mark { fill: #ffe08a; opacity: 0.82; }
.sketch-panel { stroke-width: 2; }
.zh-panel { fill: #edf4fb; stroke: #285f9e; }
.en-panel { fill: #edf8f1; stroke: #25643d; }
.sketch-label { fill: #394453; font: 14px system-ui, sans-serif; }
.sketch-label.strong { font-weight: 800; }
.sketch-link { fill: none; stroke: #285f9e; stroke-width: 3; stroke-dasharray: 6 5; }
.sketch-check { fill: none; stroke: #25643d; stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; }
.sketch-alert { fill: #fff0f0; stroke: #8d2f2f; stroke-width: 2; }
.sketch-alert-line { fill: none; stroke: #8d2f2f; stroke-width: 3; }
.refused-file { fill: #fff7f7; stroke: #8d2f2f; }
.sketch-cross { fill: none; stroke: #b34a4a; stroke-width: 4; opacity: 0.82; }
.real-run-slot figcaption {
  padding: 9px 14px;
  border-top: 1px solid var(--border);
  background: var(--paper);
  color: var(--amber);
  font-weight: 850;
  text-align: center;
}
.card-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 12px;
  padding: 20px 22px 22px;
}
.verdict, .pick, .near-miss, .fact-note, .refusal-copy {
  margin: 0;
  padding: 13px 15px;
  border-radius: 10px;
}
.verdict { background: var(--green-soft); color: var(--green); font-weight: 800; }
.verdict.limited { background: var(--amber-soft); color: var(--amber); }
.verdict.refused { background: var(--red-soft); color: var(--red); }
.pick {
  border: 1px solid #bfd3e8;
  background: var(--blue-soft);
  color: #214f83;
  font-weight: 750;
}
.near-miss {
  border: 2px solid #d9a4a4;
  background: var(--red-soft);
  color: #702626;
}
.fact-note {
  border: 2px solid #d8b878;
  background: var(--amber-soft);
  color: #654000;
}
.fact-list { margin: 0; padding-left: 2.2rem; }
.fact-list li + li { margin-top: 7px; }
.refusal-copy {
  background: var(--red);
  color: var(--paper);
  font-weight: 850;
  text-align: center;
}
.refused-endnote {
  margin: 48px 0;
  padding: 18px 20px;
  border: 1px solid #d9a4a4;
  border-radius: 10px;
  background: var(--red-soft);
  color: #702626;
}
.refused-endnote h2 { margin: 0; font-size: 1.05rem; }
.refused-endnote p { max-width: 72ch; margin: 8px 0; }
.refused-endnote a { color: #702626; font-weight: 750; }
.page-footer {
  margin-bottom: 48px;
  padding: 26px;
  border-radius: 12px;
  background: var(--ink);
  color: var(--paper);
  font-size: 1.2rem;
  font-weight: 800;
  text-align: center;
}
@media (max-width: 820px) {
  .guide-layout, .guide-layout.nav-is-closed, .chooser-choices {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .situation-nav {
    top: 8px;
    width: auto;
    max-height: calc(100vh - 16px);
  }
  .situation-nav:not([open]) {
    width: auto;
    overflow: hidden;
    border: 2px solid var(--border);
    background: var(--paper);
  }
  .situation-nav:not([open]) > summary {
    width: auto;
    height: auto;
    min-height: 52px;
    padding: 10px 16px;
    border: 0;
    border-radius: 0;
    writing-mode: horizontal-tb;
  }
  .situation-nav:not([open]) .situation-nav-content { display: none; }
}
@media (max-width: 560px) {
  body { font-size: 17px; }
  .topbar-inner, .accepted-files, .page-footer { width: min(100% - 24px, 1120px); }
  .page-label { display: none; }
  .accepted-files { padding-top: 34px; }
  .chooser-panel, .accept-contract { padding: 18px; }
  .chooser-panel-head { display: block; }
  .chooser-close { margin-top: 14px; }
  .section-title { display: block; font-size: 1.6rem; }
  .section-title span { display: block; margin-top: 5px; }
  .layout-sketch { min-height: 150px; }
}
@media print {
  .topbar, .chooser-open, .chooser-panel { display: none; }
  body { background: var(--paper); }
  #cardsView, .page-footer { display: block !important; }
  .accepted-file-card { break-inside: avoid; }
  .real-run-slot { min-height: 130px; }
  .page-footer { border: 2px solid var(--ink); background: var(--paper); color: var(--ink); }
}