/* S4 guide page */

.s4-page {
  background:
    radial-gradient(900px 520px at 82% 0%, rgba(197, 107, 69, 0.1), transparent 64%),
    radial-gradient(700px 500px at 8% 30%, rgba(141, 166, 173, 0.045), transparent 65%),
    var(--bg);
}

.s4-page .site-header { position: sticky; top: 0; }

.s4-main-nav a { white-space: nowrap; }

.s4-top-source {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 7px 14px;
  border-bottom: 1px solid rgba(197, 107, 69, 0.26);
  background: rgba(197, 107, 69, 0.075);
  color: #f3c6ad;
  font-size: 10px;
  text-align: center;
}

.s4-top-source:hover { background: rgba(197, 107, 69, 0.12); }

.s4-top-source-label {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.08em;
}

.s4-top-source strong {
  color: #fff;
  font-size: 11px;
}

.s4-top-source-arrow {
  color: var(--accent);
  font-size: 12px;
}

.s4-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.6fr);
  align-items: center;
  gap: 56px;
  padding: 66px 0 42px;
}

.s4-hero-copy h1 {
  margin: 15px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(48px, 6.5vw, 80px);
  font-weight: 800;
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.s4-hero-copy h1 em {
  color: var(--accent);
  font-style: normal;
}

.s4-lead {
  max-width: 620px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.85;
}

.s4-lead strong { color: var(--text-soft); }

.s4-hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 9px;
  margin-top: 24px;
}

.s4-douyin-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border: 1px solid rgba(197, 107, 69, 0.5);
  border-radius: 8px;
  background: linear-gradient(110deg, rgba(197, 107, 69, 0.2), rgba(197, 107, 69, 0.06));
  color: var(--text);
  transition: 0.2s;
}

.s4-douyin-btn:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.s4-douyin-avatar,
.s4-source-avatar,
.s4-corner-avatar {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  border: 1px solid rgba(197, 107, 69, 0.55);
  border-radius: 50%;
  background: linear-gradient(145deg, #f47a3d, #9a3e19);
  color: #fff;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 800;
}

.s4-douyin-btn strong {
  display: block;
  font-size: 11px;
}

.s4-douyin-btn small {
  display: block;
  margin-top: 2px;
  color: #d9a489;
  font-size: 8px;
}

.s4-copy-btn {
  padding: 0 14px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.025);
  color: var(--text-soft);
  font-size: 10px;
  cursor: pointer;
}

.s4-copy-btn:hover { border-color: var(--accent); color: var(--text); }

.s4-disclaimer {
  max-width: 620px;
  margin-top: 14px;
  color: var(--muted-2);
  font-size: 9px;
  line-height: 1.65;
}

.s4-source-card {
  padding: 20px;
  border: 1px solid rgba(197, 107, 69, 0.3);
  border-radius: var(--radius);
  background:
    linear-gradient(145deg, rgba(197, 107, 69, 0.11), transparent 55%),
    var(--panel);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.24);
}

.s4-source-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.s4-source-card-head .s4-source-avatar {
  width: 42px;
  height: 42px;
  font-size: 18px;
}

.s4-source-live {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.06em;
}

.s4-source-live i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
}

.s4-source-card h2 {
  margin-top: 15px;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.s4-source-card > p {
  margin-top: 4px;
  color: var(--muted);
  font-size: 10px;
}

.s4-source-card > a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 16px;
  color: var(--accent);
  font-size: 10px;
  font-weight: 600;
}

.s4-source-card-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.s4-source-card-foot span {
  padding: 3px 6px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 7px;
}

.s4-content { padding-bottom: 38px; }

.s4-tabs-wrap {
  position: sticky;
  top: 70px;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 17px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 10, 15, 0.93);
  backdrop-filter: blur(12px);
}

.s4-tabs {
  display: flex;
  gap: 5px;
  overflow-x: auto;
}

.s4-tab {
  flex: 0 0 auto;
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 600;
  cursor: pointer;
}

.s4-tab:hover { color: var(--text); background: rgba(255, 255, 255, 0.03); }

.s4-tab.active {
  border-color: rgba(197, 107, 69, 0.32);
  background: rgba(197, 107, 69, 0.1);
  color: var(--accent);
}

.s4-tabs-source {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
  color: #d59a7d;
  font-size: 9px;
}

.s4-tabs-source:hover { color: var(--accent); }

.s4-source-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.s4-panel-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}

.s4-panel-head h2 {
  font-family: var(--font-display);
  font-size: clamp(27px, 3.4vw, 38px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.s4-panel-head p {
  margin-top: 5px;
  color: var(--muted);
  font-size: 10px;
}

.s4-source-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  flex: 0 0 auto;
  padding: 4px 8px;
  border: 1px solid rgba(197, 107, 69, 0.3);
  border-radius: 999px;
  background: rgba(197, 107, 69, 0.07);
  color: #e7b099;
  font-size: 8px;
  line-height: 1.2;
}

.s4-source-badge .s4-source-avatar {
  width: 16px;
  height: 16px;
  border: 0;
  font-size: 8px;
}

.s4-source-badge strong { color: #fff; font-weight: 600; }

.s4-source-badge small {
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 6.5px;
}

.s4-table-card {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
}

.s4-table-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 13px;
  border-bottom: 1px solid var(--line);
}

.s4-table-card-head span {
  color: var(--muted-2);
  font-size: 8.5px;
}

.s4-table-wrap { overflow-x: auto; }

.s4-table {
  width: 100%;
  min-width: 920px;
  border-collapse: collapse;
  font-size: 11px;
}

.s4-table th {
  padding: 9px 9px;
  border-bottom: 1px solid var(--line-strong);
  background: rgba(3, 6, 10, 0.5);
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 8.5px;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-align: left;
  white-space: nowrap;
}

.s4-table td {
  padding: 10px 9px;
  border-bottom: 1px solid rgba(229, 218, 202, 0.09);
  color: #d5deea;
  vertical-align: top;
  line-height: 1.55;
}

.s4-table tr:last-child td { border-bottom: 0; }
.s4-table tbody tr:hover td { background: rgba(255, 255, 255, 0.018); }

.s4-table .rank {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 9px;
  white-space: nowrap;
}

.s4-table .gun { color: #fff; font-weight: 600; white-space: nowrap; }
.s4-table .muted { color: var(--muted-2); }
.s4-table .mono { font-family: var(--font-mono); font-size: 9px; white-space: nowrap; }
.s4-table .code { color: #a8d8ff; font-family: var(--font-mono); font-size: 9.5px; white-space: nowrap; }
.s4-table .note { color: #e2b89a; font-size: 9.5px; }
.s4-table .code-cell { min-width: 230px; }

.s4-code-row {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.s4-copy-code {
  padding: 2px 5px;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: transparent;
  color: var(--muted);
  font-size: 7px;
  cursor: pointer;
}

.s4-copy-code:hover { border-color: var(--accent); color: var(--accent); }

.s4-table tr.top-1 td { background: rgba(197, 107, 69, 0.055); }
.s4-table tr.top-2 td { background: rgba(197, 160, 94, 0.035); }
.s4-table tr.top-3 td { background: rgba(141, 166, 173, 0.025); }

.s4-table-note {
  padding: 9px 13px;
  border-top: 1px solid var(--line);
  color: var(--muted-2);
  font-size: 8px;
  line-height: 1.6;
}

.s4-empty {
  padding: 40px 20px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 11px;
  text-align: center;
}

.s4-original-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
  padding: 13px 0 30px;
  border-top: 1px solid var(--line);
  color: var(--muted-2);
  font-size: 9px;
}

.s4-original-links p { margin-right: 4px; }
.s4-original-links a { color: var(--muted); text-decoration: underline; text-underline-offset: 2px; }
.s4-original-links a:hover { color: var(--accent); }

.s4-footer {
  border-top: 1px solid var(--line);
  padding: 22px 0 26px;
  background: rgba(4, 7, 11, 0.55);
}

.s4-footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.s4-footer-source {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-soft);
}

.s4-footer-source .s4-source-avatar {
  width: 30px;
  height: 30px;
  font-size: 13px;
}

.s4-footer-source strong { color: #fff; font-size: 10px; }
.s4-footer-source small { display: block; margin-top: 2px; color: var(--muted-2); font-size: 8px; }

.s4-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
  color: var(--muted-2);
  font-size: 9px;
}

.s4-footer-links a:hover { color: var(--text); }

.s4-footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid rgba(229, 218, 202, 0.08);
  color: var(--muted-2);
  font-family: var(--font-mono);
  font-size: 7px;
}

.s4-corner-source {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 9px;
  border: 1px solid rgba(197, 107, 69, 0.42);
  border-radius: 999px;
  background: rgba(9, 14, 21, 0.94);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.36);
  backdrop-filter: blur(10px);
}

.s4-corner-source:hover { border-color: var(--accent); }

.s4-corner-avatar {
  width: 21px;
  height: 21px;
  font-size: 9px;
}

.s4-corner-text strong { display: block; color: #fff; font-size: 8px; }
.s4-corner-text small { display: block; color: var(--accent); font-family: var(--font-mono); font-size: 6px; }

.s4-toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 50;
  padding: 8px 12px;
  border: 1px solid rgba(127, 165, 141, 0.3);
  border-radius: 6px;
  background: rgba(9, 14, 21, 0.97);
  color: var(--text-soft);
  font-size: 9px;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 6px);
  transition: 0.2s;
}

.s4-toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 900px) {
  .s4-main-nav { display: none; }
  .s4-hero { grid-template-columns: 1fr; gap: 24px; padding-top: 42px; }
  .s4-source-card { order: -1; }
  .s4-panel-head { align-items: flex-start; flex-direction: column; gap: 9px; }
  .s4-tabs-wrap { top: 62px; align-items: flex-start; flex-direction: column; gap: 5px; padding: 7px 0; }
  .s4-tabs { width: 100%; }
  .s4-tabs-source { padding-left: 2px; }
  .s4-corner-source { display: none; }
}

@media (max-width: 620px) {
  .s4-top-source { justify-content: flex-start; flex-wrap: wrap; gap: 5px 7px; font-size: 9px; }
  .s4-top-source-label { flex: 0 0 auto; }
  .s4-hero-copy h1 { font-size: 48px; }
  .s4-hero-actions { flex-direction: column; }
  .s4-douyin-btn, .s4-copy-btn { width: 100%; min-height: 44px; }
  .s4-copy-btn { padding: 10px 12px; }
  .s4-footer-inner { flex-direction: column; align-items: flex-start; }
  .s4-footer-bottom { flex-direction: column; gap: 6px; }
  .s4-table { min-width: 760px; }
  .s4-table th, .s4-table td { padding: 8px 7px; }
  .s4-table-card-head { align-items: flex-start; flex-direction: column; gap: 7px; }
}