/* --------------------------------------------------------------------------
 * topic.css — long-form Chinese SEO pages with embedded detection widgets.
 * Loaded after style.css; keeps the same colours, type and controls.
 * -------------------------------------------------------------------------- */

.topic-page {
  --muted: #5E6878;
  --green-text: #146C3E;
  --amber-text: #8A5A00;
  --blue: #2F5FD0;
  background:
    radial-gradient(900px 420px at 82% -8%, rgba(74, 125, 255, 0.10), transparent 68%),
    radial-gradient(700px 360px at 4% 2%, rgba(255, 201, 60, 0.12), transparent 64%),
    var(--bg);
}

[data-theme="dark"] .topic-page {
  --muted: #9AA4BC;
  --green-text: #5BD996;
  --amber-text: #F0B455;
  --blue: #8FB1FF;
}

.topic-main {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

.topic-breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 7px;
  color: var(--muted);
  font-size: 12.5px;
  margin: 22px 0 0;
}
.topic-breadcrumb a { color: var(--muted); }
.topic-breadcrumb a:hover { color: var(--ink); }
.topic-breadcrumb span { opacity: 0.55; }

.topic-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 48px;
  align-items: end;
  padding: 42px 0 34px;
}

.topic-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.topic-kicker::before {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
}

.topic-hero h1 {
  max-width: 780px;
  font-family: var(--display);
  font-size: clamp(34px, 4.5vw, 54px);
  font-weight: 800;
  line-height: 1.13;
  letter-spacing: -0.018em;
}

.topic-lead {
  max-width: 740px;
  margin: 20px 0 0;
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.85;
}

.topic-lead strong { color: var(--ink); }

.topic-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 20px;
}
.topic-meta span {
  padding: 5px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-dim);
  font-size: 12px;
  font-weight: 600;
}

.topic-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 24px;
}

.topic-hero-aside {
  padding: 21px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: 0 18px 50px rgba(21, 26, 46, 0.06);
}
.topic-hero-aside h2 {
  font-size: 15px;
  line-height: 1.4;
}
.topic-hero-aside p {
  margin: 9px 0 0;
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.75;
}
.topic-hero-aside ul {
  display: grid;
  gap: 8px;
  margin: 15px 0 0;
  padding: 0;
  list-style: none;
}
.topic-hero-aside li {
  display: flex;
  gap: 8px;
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.55;
}
.topic-hero-aside li::before {
  content: "✓";
  color: var(--green-text);
  font-weight: 700;
}
.topic-hero-aside .topic-aside-link {
  display: inline-flex;
  margin-top: 16px;
  font-size: 13px;
  font-weight: 700;
}

/* ------------------------------------------------------------- 检测器 */
.topic-tool-band {
  margin: 8px 0 42px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: var(--surface);
  box-shadow: 0 24px 70px rgba(21, 26, 46, 0.07);
}

.topic-tool-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 22px;
  margin-bottom: 18px;
}
.topic-tool-head h2 {
  margin: 0 0 5px;
  font-size: 19px;
  line-height: 1.35;
}
.topic-tool-head p {
  max-width: 760px;
  margin: 0;
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.7;
}
.topic-tool-head .btn { flex: none; }

.topic-tool-section-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 22px 0 12px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  font-weight: 700;
}
.topic-tool-section-title span {
  display: inline-grid;
  place-items: center;
  min-width: 22px;
  height: 22px;
  padding: 0 6px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 11px;
}

.topic-report-status {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 600;
}
.topic-report-status::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--muted);
}
.topic-report-status.is-loading { color: var(--blue); }
.topic-report-status.is-loading::before { background: var(--blue); animation: topic-pulse 900ms ease-in-out infinite; }
.topic-report-status.is-ok { color: var(--green-text); }
.topic-report-status.is-ok::before { background: var(--green); }
.topic-report-status.is-error { color: var(--red-text); }
.topic-report-status.is-error::before { background: var(--red); }

@keyframes topic-pulse {
  0%, 100% { opacity: 0.35; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.15); }
}

.topic-report-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 210px;
  gap: 12px;
}

.topic-report-main,
.topic-score-card,
.topic-lookup-box {
  border: 1px solid var(--line);
  border-radius: 17px;
  background: var(--surface-2);
}

.topic-report-main {
  min-width: 0;
  padding: 17px 18px;
}

.topic-report-label {
  display: block;
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.topic-report-ip {
  display: block;
  overflow: hidden;
  color: var(--ink);
  font-family: var(--mono);
  font-size: clamp(22px, 3.2vw, 31px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topic-report-place {
  display: block;
  margin-top: 5px;
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 600;
}

.topic-report-isp {
  display: block;
  overflow: hidden;
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topic-score-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 15px 17px;
}
.topic-score-line {
  display: flex;
  align-items: baseline;
  gap: 5px;
  margin: 2px 0 7px;
}
.topic-score-value {
  font-family: var(--display);
  font-size: 41px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
}
.topic-score-unit { color: var(--muted); font-size: 11px; }
.topic-score-card .badge { align-self: flex-start; }

.topic-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin-top: 10px;
}
.topic-fact {
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}
.topic-fact span {
  display: block;
  margin-bottom: 3px;
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.topic-fact strong {
  display: block;
  overflow: hidden;
  color: var(--ink);
  font-size: 12.5px;
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topic-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 24px;
  margin-top: 11px;
}
.topic-empty { color: var(--muted); font-size: 12px; }

.topic-note,
.topic-verdict {
  margin: 10px 0 0;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text-dim);
  font-size: 12.5px;
  line-height: 1.65;
}
.topic-verdict {
  border-left: 3px solid var(--blue);
  background: rgba(74, 125, 255, 0.055);
}
.topic-note strong { color: var(--ink); }

.topic-alert {
  margin: 11px 0 0;
  padding: 10px 13px;
  border: 1px solid rgba(244, 88, 122, 0.28);
  border-radius: 10px;
  background: rgba(244, 88, 122, 0.07);
  color: var(--red-text);
  font-size: 12.5px;
  line-height: 1.6;
}
.topic-alert.is-warn {
  border-color: rgba(232, 163, 61, 0.3);
  background: rgba(232, 163, 61, 0.08);
  color: var(--amber-text);
}

.topic-lookup-box {
  margin-top: 13px;
  padding: 15px;
}
.topic-lookup-form {
  display: flex;
  gap: 8px;
}
.topic-lookup-form input {
  min-width: 0;
  flex: 1;
  height: 42px;
  padding: 0 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 13px;
  outline: none;
}
.topic-lookup-form input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(74, 125, 255, 0.12); }
.topic-lookup-form .btn { height: 42px; }
.topic-lookup-hint {
  margin: 8px 2px 0;
  color: var(--muted);
  font-size: 11.5px;
}

.topic-connectivity {
  margin-top: 18px;
  padding: 0;
  border: 0;
  background: transparent;
}
.topic-connectivity .conn-head { margin-bottom: 0; }
.topic-connectivity .conn-sub { max-width: 690px; }
.topic-connectivity .conn-foot { margin-bottom: 0; }
.topic-connectivity .conn-region.is-domestic { color: #2457CC; }
.topic-connectivity .conn-region.is-global { color: #5B3AC0; }
.topic-connectivity .conn-logo { color: #000000; }
.topic-connectivity .conn-logo[data-brand="douyin"],
.topic-connectivity .conn-logo[data-brand="tiktok"],
.topic-connectivity .conn-logo[data-brand="x"],
.topic-connectivity .conn-logo[data-brand="github"] { color: #FFFFFF; }
[data-theme="dark"] .topic-connectivity .conn-region.is-domestic { color: #8FB2FF; }
[data-theme="dark"] .topic-connectivity .conn-region.is-global { color: #BBA8FF; }

/* ------------------------------------------------------------- 正文 */
.topic-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 254px;
  gap: 58px;
  align-items: start;
  padding-bottom: 30px;
}

.topic-article {
  min-width: 0;
  max-width: 790px;
}

.topic-article section {
  padding-top: 8px;
  scroll-margin-top: 92px;
}
.topic-article section + section { margin-top: 42px; }

.topic-article h2 {
  margin: 0 0 15px;
  font-family: var(--display);
  font-size: clamp(25px, 2.5vw, 32px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.012em;
}
.topic-article h3 {
  margin: 24px 0 9px;
  font-size: 17px;
  line-height: 1.45;
}
.topic-article p {
  margin: 0 0 13px;
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.9;
}
.topic-article p strong,
.topic-article li strong { color: var(--ink); }
.topic-article ul,
.topic-article ol {
  margin: 10px 0 16px;
  padding-left: 21px;
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.85;
}
.topic-article li + li { margin-top: 5px; }
.topic-article a { font-weight: 600; }
.topic-article p a,
.topic-article li a,
.topic-lookup-hint a,
.topic-aside-link {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
.topic-article code { white-space: nowrap; }

.topic-index {
  padding: 0;
  margin: 0;
  list-style: none;
}
.topic-index li + li { margin-top: 7px; }
.topic-index a {
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 500;
}
.topic-index a:hover { color: var(--ink); }
.topic-index .is-active a { color: var(--blue); font-weight: 700; }

.topic-callout {
  margin: 18px 0;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--yellow);
  border-radius: 13px;
  background: var(--surface);
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.8;
}
.topic-callout strong { color: var(--ink); }
.topic-callout.is-blue { border-left-color: var(--blue); background: rgba(74, 125, 255, 0.04); }
.topic-callout.is-red { border-left-color: var(--red); background: rgba(244, 88, 122, 0.045); }

.topic-fact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 11px;
  margin: 18px 0 20px;
}
.topic-fact-card {
  padding: 15px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
}
.topic-fact-card b {
  display: block;
  margin-bottom: 5px;
  color: var(--ink);
  font-size: 13.5px;
}
.topic-fact-card p {
  margin: 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.7;
}

.topic-table-wrap {
  overflow-x: auto;
  margin: 17px 0 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
}
.topic-table {
  width: 100%;
  min-width: 590px;
  border-collapse: collapse;
  font-size: 13px;
  line-height: 1.65;
}
.topic-table th,
.topic-table td {
  padding: 11px 13px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.topic-table th {
  background: var(--surface-2);
  color: var(--ink);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.03em;
  white-space: nowrap;
}
.topic-table td { color: var(--text-dim); }
.topic-table tr:last-child td { border-bottom: 0; }
.topic-table td strong { color: var(--ink); }

.topic-steps {
  display: grid;
  gap: 10px;
  margin: 17px 0 19px;
  padding: 0;
  list-style: none;
}
.topic-step {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
}
.topic-step-num {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--panel-dark);
  color: #FFFFFF;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
}
[data-theme="dark"] .topic-step-num { background: var(--yellow); color: #151A2E; }
.topic-step b {
  display: block;
  margin-bottom: 2px;
  color: var(--ink);
  font-size: 14px;
}
.topic-step p {
  margin: 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.7;
}

.topic-check-list {
  display: grid;
  gap: 9px;
  margin: 15px 0 18px;
  padding: 0;
  list-style: none;
}
.topic-check-list li {
  position: relative;
  padding-left: 24px;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.75;
}
.topic-check-list li::before {
  content: "✓";
  position: absolute;
  top: 0;
  left: 0;
  color: var(--green-text);
  font-weight: 800;
}
.topic-check-list.is-cross li::before { content: "×"; color: var(--red-text); }

.topic-misconceptions {
  display: grid;
  gap: 9px;
  margin-top: 15px;
}
.topic-misconception {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--surface);
}
.topic-misconception h3 {
  margin: 0 0 4px;
  font-size: 14px;
}
.topic-misconception p {
  margin: 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.7;
}

.topic-faq {
  display: grid;
  gap: 8px;
  margin-top: 15px;
}
.topic-faq details {
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--surface);
}
.topic-faq summary {
  padding: 14px 16px;
  color: var(--ink);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
  list-style: none;
}
.topic-faq summary::-webkit-details-marker { display: none; }
.topic-faq summary::after {
  content: "+";
  float: right;
  margin-left: 12px;
  color: var(--muted);
  font-size: 18px;
  font-weight: 400;
}
.topic-faq details[open] summary::after { content: "−"; }
.topic-faq details p {
  margin: 0;
  padding: 0 16px 15px;
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.8;
}

.topic-toc {
  position: sticky;
  top: 82px;
  padding: 17px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
}
.topic-toc-title {
  margin: 0 0 11px;
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.topic-cta {
  margin: 38px 0 0;
  padding: 28px;
  border-radius: 22px;
  background: var(--panel-dark);
  color: var(--on-navy);
}
.topic-cta h2 {
  margin: 0 0 8px;
  color: #FFFFFF;
  font-size: 22px;
}
.topic-cta p {
  max-width: 670px;
  margin: 0;
  color: var(--on-navy-dim);
  font-size: 13.5px;
  line-height: 1.8;
}
.topic-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 17px;
}

.topic-related {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 22px;
}
.topic-related-card {
  display: block;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  color: var(--ink);
}
.topic-related-card:hover { border-color: var(--line-strong); text-decoration: none; }
.topic-related-card span {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.topic-related-card b { display: block; font-size: 14px; line-height: 1.45; }
.topic-related-card p { margin: 6px 0 0; color: var(--muted); font-size: 12px; line-height: 1.6; }

.topic-footer { margin-top: 64px; }
.topic-footer .foot-col h3 {
  margin: 0 0 2px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.nav-links a.is-current {
  background: var(--surface-2);
  color: var(--ink);
}

@media (max-width: 1020px) {
  .topic-hero { grid-template-columns: minmax(0, 1fr) 295px; gap: 30px; }
  .topic-layout { grid-template-columns: minmax(0, 1fr) 220px; gap: 34px; }
}

@media (max-width: 860px) {
  .topic-hero { grid-template-columns: 1fr; gap: 26px; align-items: start; padding-top: 34px; }
  .topic-hero-aside { max-width: 620px; }
  .topic-layout { grid-template-columns: 1fr; gap: 26px; }
  .topic-toc { position: static; order: -1; }
  .topic-index { display: flex; flex-wrap: wrap; gap: 5px 14px; }
  .topic-index li + li { margin-top: 0; }
  .topic-article { max-width: none; }
  .topic-facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 700px) {
  .topic-main { width: min(100% - 32px, 1120px); }
  .topic-tool-band { padding: 17px; border-radius: 20px; }
  .topic-tool-head { flex-direction: column; gap: 12px; }
  .topic-report-grid { grid-template-columns: 1fr; }
  .topic-score-card { flex-direction: row; align-items: center; justify-content: space-between; gap: 14px; }
  .topic-score-line { margin: 0; }
  .topic-fact-grid { grid-template-columns: 1fr; }
  .topic-related { grid-template-columns: 1fr; }
  .topic-lookup-form { flex-direction: column; }
  .topic-lookup-form .btn { width: 100%; }
  .topic-table { min-width: 530px; }
}

@media (max-width: 520px) {
  .topic-hero { padding-top: 26px; }
  .topic-hero h1 { font-size: 33px; }
  .topic-lead { font-size: 14.5px; }
  .topic-hero-actions .btn { flex: 1 1 auto; }
  .topic-facts { grid-template-columns: 1fr; }
  .topic-cta { padding: 22px; }
  .topic-article p { font-size: 14.5px; }
}