/* ===== Reset & Root ===== */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
ul, ol { list-style: none; padding: 0; }
img { max-width: 100%; display: block; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
a { color: var(--accent-green); }

:root {
  --page-bg: #f5f0e8;
  --section-brown: #3e2a1e;
  --section-red: #6b2d2d;
  --card-bg: #faf3e0;
  --accent-green: #2d6a4f;
  --accent-orange: #e76f51;
  --accent-orange-ink: #a84128;
  --status-new: #f4a261;
  --status-hot: #e63946;
  --status-complete: #2a9d8f;
  --tag-yellow: #e9c46a;
  --tag-green: #2a9d8f;
  --tag-purple: #9b5de5;
  --text-primary: #1e1e1e;
  --text-secondary: #5c5c5c;
  --border: #d4c5b0;
  --index-bar-bg: #264653;
  --heading-font: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
  --body-font: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  --mono-font: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --container-w: 1280px;
  --progress: 0%;
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--body-font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--page-bg);
  background-image:
    repeating-linear-gradient(0deg, transparent 0 23px, rgba(62,42,30,.025) 23px 24px),
    repeating-linear-gradient(90deg, transparent 0 23px, rgba(62,42,30,.025) 23px 24px);
}
h1, h2, h3, h4 {
  font-family: var(--heading-font);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}
[id] { scroll-margin-top: 100px; }
:focus-visible {
  outline: 2px solid var(--accent-orange);
  outline-offset: 2px;
}

/* ===== Basic Layout ===== */
.container {
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: 24px;
}
.main-content { min-height: 60vh; }
.section-pad { padding-block: 48px; }
.section--dark-brown {
  background-color: var(--section-brown);
  background-image:
    linear-gradient(rgba(245,240,232,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245,240,232,.05) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--card-bg);
}
.section--dark-red {
  background-color: var(--section-red);
  background-image:
    linear-gradient(rgba(245,240,232,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245,240,232,.05) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--card-bg);
}
.section--dark-brown .section-title,
.section--dark-red .section-title { color: var(--card-bg); }
.section--dark-brown .section-meta,
.section--dark-red .section-meta { color: rgba(245,240,232,.65); }
.section--dark-brown .section-head,
.section--dark-red .section-head { border-bottom-color: rgba(245,240,232,.35); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 24px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--text-primary);
}
.section-title { font-size: 24px; }
.section-meta {
  font-family: var(--mono-font);
  font-size: 12px;
  color: var(--text-secondary);
  letter-spacing: .04em;
}
.section-note {
  font-family: var(--mono-font);
  font-size: 13px;
  color: var(--text-secondary);
}
.page-title { font-size: clamp(28px, 4vw, 40px); margin-bottom: 12px; }
.page-lede {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 680px;
  margin-bottom: 28px;
}
.prose {
  max-width: 720px;
  font-size: 15px;
  line-height: 1.9;
}
.prose p { margin-bottom: 14px; }
.prose h2 {
  font-size: 21px;
  margin: 34px 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}
.prose h3 { font-size: 17px; margin: 24px 0 8px; }
.prose ul, .prose ol { margin: 0 0 14px; padding-left: 1.4em; }
.prose ul { list-style: square; }
.prose li { margin-bottom: 4px; }

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-family: var(--mono-font);
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--accent-green); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent-orange); }
.breadcrumb-sep { color: var(--border); }

/* ===== Coord Label ===== */
.coord-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono-font);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--text-secondary);
  text-transform: uppercase;
}
.coord-label::before {
  content: "+";
  font-weight: 700;
  color: var(--accent-orange-ink);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-family: var(--body-font);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.btn-primary { background: var(--accent-green); color: #fff; }
.btn-primary:hover { background: #1f5b44; color: #fff; }
.btn-outline { border-color: var(--accent-green); color: var(--accent-green); background: transparent; }
.btn-outline:hover { background: var(--accent-green); color: #fff; }
.btn-light { background: var(--card-bg); color: var(--text-primary); }
.btn-light:hover { background: #e9dec8; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--section-brown);
  background-image:
    linear-gradient(rgba(245,240,232,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245,240,232,.06) 1px, transparent 1px);
  background-size: 24px 24px;
  box-shadow: 0 4px 14px rgba(30,30,30,.22);
}
.skip-link {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2000;
  padding: 8px 16px;
  background: var(--accent-orange);
  color: var(--text-primary);
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-220%);
  transition: transform .2s ease;
}
.skip-link:focus-visible { transform: translateY(0); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: 24px;
  min-height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--card-bg);
  text-decoration: none;
  flex-shrink: 0;
}
.brand:hover { color: var(--card-bg); }
.brand-mark {
  position: relative;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  flex: none;
  background: var(--accent-orange);
  color: var(--text-primary);
  font-family: var(--mono-font);
  font-size: 20px;
  font-weight: 700;
}
.brand-mark::before {
  content: "";
  position: absolute;
  top: -8px;
  left: 50%;
  width: 2px;
  height: 8px;
  background: var(--status-new);
  transform: translateX(-50%);
}
.brand-mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: -8px;
  width: 8px;
  height: 2px;
  background: var(--status-new);
  transform: translateY(-50%);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name {
  font-family: var(--heading-font);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .04em;
}
.brand-sub {
  font-family: var(--mono-font);
  font-size: 10px;
  letter-spacing: .18em;
  color: var(--status-new);
}

.site-nav { display: flex; align-items: center; }
.nav-list { display: flex; align-items: center; gap: 6px; }
.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 10px;
  color: rgba(245,240,232,.85);
  text-decoration: none;
  font-size: 14px;
  white-space: nowrap;
  transition: color .15s ease;
}
.nav-link:hover { color: var(--card-bg); }
.nav-link::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 3px;
  height: 2px;
  background: var(--status-new);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .18s ease;
}
.nav-link:hover::after,
.nav-link[aria-current="page"]::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--status-new); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 0;
  margin-left: auto;
  flex-shrink: 0;
  background: transparent;
  border: 1px solid rgba(245,240,232,.45);
  transition: border-color .15s ease;
}
.nav-toggle:hover { border-color: var(--accent-orange); }
.nav-toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--card-bg);
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.header-coord {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 4px 24px 5px;
  background: rgba(0,0,0,.18);
  border-top: 1px solid rgba(245,240,232,.12);
}
.header-coord .coord-label { color: rgba(245,240,232,.68); }
.header-coord .coord-label::before { color: var(--status-new); }

.header-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: rgba(245,240,232,.14);
}
.header-progress-bar {
  display: block;
  height: 100%;
  width: var(--progress);
  background: var(--accent-orange);
  transition: width .12s linear;
}

/* ===== Footer ===== */
.site-footer {
  background-color: var(--section-red);
  background-image:
    linear-gradient(rgba(245,240,232,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245,240,232,.04) 1px, transparent 1px);
  background-size: 32px 32px;
  color: rgba(245,240,232,.85);
}
.site-footer::before {
  content: "";
  display: block;
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--accent-orange) 0 8px, transparent 8px 16px);
  opacity: .7;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 32px;
  padding-block: 44px 34px;
}
.footer-note {
  margin-top: 12px;
  font-size: 14px;
  color: rgba(245,240,232,.65);
}
.footer-col-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono-font);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--status-new);
  margin-bottom: 12px;
}
.footer-col-title::before {
  content: "";
  width: 16px;
  height: 2px;
  background: var(--accent-orange);
  flex: none;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.footer-links a {
  display: inline-block;
  padding: 4px 0;
  color: rgba(245,240,232,.82);
  text-decoration: none;
  font-size: 14px;
  border-bottom: 1px solid transparent;
  transition: color .15s ease, border-color .15s ease;
}
.footer-links a:hover { color: var(--status-new); border-bottom-color: var(--status-new); }
.footer-address {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-top: 16px;
  font-style: normal;
  font-size: 13px;
  color: rgba(245,240,232,.68);
  line-height: 1.6;
}
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0 24px;
  border-top: 1px solid rgba(245,240,232,.18);
  font-family: var(--mono-font);
  font-size: 12px;
  color: rgba(245,240,232,.6);
}

/* ===== Card Grid ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 18px;
}
.info-card {
  display: flex;
  flex-direction: column;
  position: relative;
  background: var(--card-bg);
  box-shadow: 0 4px 10px rgba(62,42,30,.1);
  border-top: 4px solid var(--accent-green);
  text-decoration: none;
  color: var(--text-primary);
  transition: transform .18s ease, box-shadow .18s ease;
}
.info-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 20px rgba(62,42,30,.16);
}
.info-card--orange { border-top-color: var(--accent-orange); }
.info-card--red { border-top-color: var(--status-hot); }
.info-card--teal { border-top-color: var(--status-complete); }
.info-card--purple { border-top-color: var(--tag-purple); }
.info-card--yellow { border-top-color: var(--tag-yellow); }
.card-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 14px 14px;
  flex: 1;
}
.card-title {
  font-family: var(--heading-font);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
}
.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--mono-font);
  font-size: 12px;
  color: var(--text-secondary);
}
.card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

/* ===== Cover Slot ===== */
.cover-slot {
  position: relative;
  overflow: hidden;
  background-color: var(--index-bar-bg);
  aspect-ratio: 4 / 3;
}
.cover-slot::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(245,240,232,.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245,240,232,.09) 1px, transparent 1px);
  background-size: 16px 16px;
}
.cover-slot::after {
  content: attr(data-label);
  position: absolute;
  left: 8px;
  bottom: 8px;
  z-index: 2;
  font-family: var(--mono-font);
  font-size: 11px;
  letter-spacing: .03em;
  color: var(--card-bg);
  background: rgba(30,30,30,.72);
  padding: 3px 7px;
}
.cover-slot img {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.cover-slot--card { aspect-ratio: 3 / 4; }
.cover-slot--rail { aspect-ratio: 16 / 9; }
.cover-slot--mosaic { aspect-ratio: 4 / 3; }
.cover-slot--frame { aspect-ratio: 4 / 5; }

.quality-corner {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  padding: 2px 7px;
  font-family: var(--mono-font);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .05em;
  background: var(--status-hot);
  color: #000;
}
.quality-corner--new { background: var(--status-new); color: var(--text-primary); }
.quality-corner--green { background: var(--accent-green); color: #fff; }

/* ===== Mosaic ===== */
.mosaic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 14px;
}
.mosaic-tile {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
  min-height: 110px;
  padding: 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  text-decoration: none;
  color: var(--text-primary);
  overflow: hidden;
  transition: transform .18s ease, box-shadow .18s ease;
}
.mosaic-tile:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 18px rgba(30,30,30,.18);
}
.mosaic-tile::after {
  content: "";
  position: absolute;
  right: 10px;
  bottom: 10px;
  width: 16px;
  height: 16px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  opacity: .4;
}
.mosaic-tile--green { background: var(--accent-green); color: #fff; }
.mosaic-tile--orange { background: var(--accent-orange); color: var(--text-primary); }
.mosaic-tile--brown { background: var(--section-brown); color: var(--card-bg); }
.mosaic-tile--red { background: var(--section-red); color: var(--card-bg); }
.mosaic-tile--yellow { background: var(--tag-yellow); color: var(--text-primary); }
.mosaic-tile--blue { background: var(--index-bar-bg); color: var(--card-bg); }
.mosaic-label {
  position: relative;
  z-index: 1;
  font-family: var(--heading-font);
  font-size: 16px;
  font-weight: 700;
}
.mosaic-count {
  position: relative;
  z-index: 1;
  font-family: var(--mono-font);
  font-size: 12px;
  color: currentColor;
  opacity: .85;
}

/* ===== Entry List ===== */
.entry-list { display: flex; flex-direction: column; gap: 8px; }
.entry-row {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 8px 14px;
  padding: 10px 14px;
  background: var(--card-bg);
  box-shadow: 0 2px 0 rgba(62,42,30,.08);
  text-decoration: none;
  color: var(--text-primary);
  transition: transform .15s ease, box-shadow .15s ease;
}
.entry-row:hover {
  transform: translateX(4px);
  box-shadow: 0 2px 0 var(--accent-orange);
}
.entry-index {
  font-family: var(--mono-font);
  font-size: 14px;
  font-weight: 700;
  color: var(--accent-orange-ink);
  text-align: right;
}
.entry-title {
  font-family: var(--heading-font);
  font-size: 15px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.entry-badges { display: inline-flex; gap: 6px; justify-content: flex-end; }
.entry-meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono-font);
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* ===== Tags & Badges ===== */
.tag-group { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-size: 13px;
  font-family: var(--body-font);
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text-primary);
  text-decoration: none;
  cursor: pointer;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.tag-chip:hover { border-color: var(--accent-green); color: var(--accent-green); }
.tag-chip[aria-pressed="true"] {
  background: var(--accent-green);
  border-color: var(--accent-green);
  color: #fff;
}
.tag-chip--yellow { background: var(--tag-yellow); border-color: var(--tag-yellow); color: var(--text-primary); }
.tag-chip--green { background: var(--tag-green); border-color: var(--tag-green); color: #000; }
.tag-chip--purple { background: var(--tag-purple); border-color: var(--tag-purple); color: #000; }

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 7px;
  font-family: var(--mono-font);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .03em;
  line-height: 1.6;
}
.status-badge::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
}
.badge-new { background: var(--status-new); color: var(--text-primary); }
.badge-hot { background: var(--status-hot); color: #000; }
.badge-complete { background: var(--status-complete); color: #000; }

/* ===== Metric ===== */
.metric {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono-font);
  font-size: 12px;
  color: var(--text-secondary);
}
.metric-bar {
  flex: 1;
  height: 8px;
  background: var(--border);
  overflow: hidden;
}
.metric-fill {
  display: block;
  height: 100%;
  width: 0;
  background: var(--accent-green);
}
.metric-fill--orange { background: var(--accent-orange); }
.metric-fill--red { background: var(--status-hot); }
.metric-value { font-weight: 700; }

/* ===== Index Bar ===== */
.index-bar {
  position: sticky;
  top: 96px;
  z-index: 40;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  padding: 10px 12px;
  background: var(--index-bar-bg);
  box-shadow: 0 4px 12px rgba(30,30,30,.16);
}
.index-bar-label {
  font-family: var(--mono-font);
  font-size: 11px;
  color: var(--status-new);
  margin-right: 6px;
  letter-spacing: .06em;
}
.index-bar-item {
  display: inline-block;
  padding: 4px 8px;
  font-family: var(--mono-font);
  font-size: 13px;
  line-height: 1.4;
  color: rgba(245,240,232,.8);
  text-decoration: none;
  border: 1px solid transparent;
  transition: color .15s ease, border-color .15s ease, background .15s ease;
}
.index-bar-item:hover { color: var(--card-bg); border-color: rgba(245,240,232,.35); }
.index-bar-item[aria-current="true"] { background: var(--accent-orange); color: var(--text-primary); }

/* ===== Horizontal Rail ===== */
.h-rail {
  position: relative;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.h-rail::-webkit-scrollbar { height: 8px; }
.h-rail::-webkit-scrollbar-thumb { background: var(--border); }
.h-rail-track {
  display: flex;
  gap: 14px;
  width: max-content;
  padding: 4px 4px 16px;
}
.h-rail-card {
  flex: none;
  width: 220px;
  scroll-snap-align: start;
}

/* ===== Spec Table ===== */
.spec-table-wrap { overflow-x: auto; }
.spec-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  background: var(--card-bg);
  font-size: 14px;
}
.spec-table caption {
  text-align: left;
  font-family: var(--mono-font);
  font-size: 12px;
  color: var(--text-secondary);
  padding-bottom: 8px;
}
.spec-table th,
.spec-table td {
  padding: 10px 14px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
.spec-table thead th {
  background: var(--section-brown);
  color: var(--card-bg);
  font-family: var(--mono-font);
  font-weight: 600;
  letter-spacing: .04em;
}
.spec-table tbody tr:nth-child(even) { background: rgba(212,197,176,.18); }

/* ===== Panel ===== */
.panel {
  background: var(--card-bg);
  border: 1px solid var(--border);
  box-shadow: 0 2px 0 rgba(62,42,30,.08);
}
.panel + .panel { margin-top: 10px; }
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 14px 16px;
  background: transparent;
  font-family: var(--body-font);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
}
.panel-head::after {
  content: "+";
  font-family: var(--mono-font);
  font-size: 18px;
  line-height: 1;
  color: var(--accent-orange-ink);
  transition: transform .2s ease;
}
.panel[data-open] .panel-head::after { transform: rotate(45deg); }
.panel-body {
  display: none;
  padding: 0 16px 16px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
}
.panel[data-open] .panel-body { display: block; }

/* ===== Responsive ===== */
@media (max-width: 920px) {
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--section-brown);
    border-top: 2px solid var(--accent-orange);
    box-shadow: 0 16px 32px rgba(30,30,30,.28);
  }
  .site-nav[data-open] { display: block; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; padding: 6px 24px 18px; }
  .nav-item + .nav-item { border-top: 1px solid rgba(245,240,232,.14); }
  .nav-link { display: block; padding: 12px 4px; font-size: 15px; }
  .nav-link::after { left: 4px; right: 4px; bottom: 6px; }
  .nav-toggle { display: flex; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .container { padding-inline: 16px; }
  .header-coord { display: none; }
  .header-inner { min-height: 56px; padding-inline: 16px; }
  .brand-name { font-size: 18px; }
  .brand-sub { display: none; }
  .brand-mark { width: 36px; height: 36px; font-size: 17px; }
  .section-pad { padding-block: 32px; }
  .section-title { font-size: 20px; }
  .card-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; }
  .entry-row { grid-template-columns: 30px minmax(0, 1fr); }
  .entry-index { grid-row: 1 / span 2; }
  .entry-title { grid-column: 2; }
  .entry-badges { grid-column: 2; grid-row: 2; justify-content: flex-start; }
  .entry-meta { grid-column: 2; grid-row: 3; white-space: normal; }
  .index-bar { top: 60px; }
  .mosaic-grid { grid-template-columns: repeat(2, 1fr); }
  .h-rail-card { width: 180px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; padding-block: 32px 24px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 6px; }
}

/* ===== Motion ===== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .info-card:hover,
  .mosaic-tile:hover,
  .entry-row:hover { transform: none; }
  .header-progress-bar { transition: none; }
}