/* 主题与基础 */
:root {
  --bg: #020617;
  --bg-elevated: #0b1220;
  --primary: #22c55e;
  --primary-soft: rgba(34,197,94,0.12);
  --primary-strong: #4ade80;
  --text-main: #e5e7eb;
  --text-muted: #9ca3af;
  --text-soft: #6b7280;
  --border-subtle: #1f2937;
  --radius-lg: 16px;
  --radius-md: 10px;
  --shadow-soft: 0 18px 45px rgba(15,23,42,0.65);
  --body-bg:
    radial-gradient(130% 160% at 0% 0%, rgba(34,197,94,0.18), transparent 60%),
    radial-gradient(120% 150% at 100% 100%, rgba(56,189,248,0.16), transparent 62%),
    radial-gradient(circle at top, #020617 0, #020617 38%, #000 78%, #000 100%);
  --badge-bg: rgba(15,23,42,0.9);
  --badge-border: rgba(148,163,184,0.25);
  --pill-bg: rgba(15,23,42,0.7);
  --pill-border: rgba(148,163,184,0.4);
  --sidebar-bg: radial-gradient(circle at top left, rgba(34,197,94,0.15), rgba(15,23,42,0.98));
  --sidebar-border: rgba(148,163,184,0.35);
  --search-bg: rgba(15,23,42,0.96);
  --search-border: rgba(148,163,184,0.6);
  --chip-bg: rgba(15,23,42,0.7);
  --chip-border: rgba(148,163,184,0.4);
  --chip-hover-bg: rgba(15,23,42,0.95);
  --chip-hover-border: rgba(148,163,184,0.8);
  --legend-border: rgba(148,163,184,0.35);
  --main-bg: rgba(15,23,42,0.96);
  --main-border: rgba(31,41,55,0.9);
  --count-pill-bg: rgba(15,23,42,0.9);
  --count-pill-border: rgba(148,163,184,0.6);
  --toggle-bg: rgba(15,23,42,0.9);
  --toggle-border: rgba(148,163,184,0.6);
  --card-bg: radial-gradient(circle at top left, rgba(148,163,184,0.1), rgba(15,23,42,1));
  --card-border: rgba(31,41,55,1);
  --card-hover-border: rgba(148,163,184,0.9);
  --card-hover-bg: radial-gradient(circle at top left, rgba(34,197,94,0.18), rgba(15,23,42,1));
  --meta-bg: rgba(15,23,42,0.9);
  --meta-border: rgba(55,65,81,0.9);
  --category-label-bg: rgba(15,23,42,0.9);
  --category-label-border: rgba(55,65,81,0.9);
  --noresult-bg: rgba(15,23,42,0.8);
  --noresult-border: rgba(75,85,99,0.9);
  --giscus-bg: rgba(15,23,42,0.8);
  --giscus-border: rgba(30,64,175,0.7);
  --modal-bg: rgba(15,23,42,0.98);
  --modal-border: rgba(148,163,184,0.4);
  --modal-overlay: rgba(0,0,0,0.75);
}

body.light-theme {
  --bg: #f8fafc;
  --bg-elevated: #ffffff;
  --primary: #16a34a;
  --primary-soft: rgba(16,163,74,0.08);
  --primary-strong: #15803d;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-soft: #94a3b8;
  --border-subtle: #cbd5f5;
  --shadow-soft: 0 18px 45px rgba(15,23,42,0.12);
  --body-bg:
    radial-gradient(130% 160% at 0% 0%, rgba(34,197,94,0.16), transparent 64%),
    radial-gradient(120% 150% at 100% 100%, rgba(59,130,246,0.18), transparent 60%),
    radial-gradient(circle at top, #f8fafc 0, #f8fafc 40%, #e2e8f0 80%, #e2e8f0 100%);
  --badge-bg: rgba(255,255,255,0.8);
  --badge-border: rgba(148,163,184,0.5);
  --pill-bg: rgba(255,255,255,0.85);
  --pill-border: rgba(148,163,184,0.5);
  --sidebar-bg: radial-gradient(circle at top left, rgba(34,197,94,0.2), #f8fafc);
  --sidebar-border: rgba(148,163,184,0.4);
  --search-bg: rgba(255,255,255,0.9);
  --search-border: rgba(148,163,184,0.7);
  --chip-bg: rgba(255,255,255,0.85);
  --chip-border: rgba(148,163,184,0.5);
  --chip-hover-bg: rgba(255,255,255,1);
  --chip-hover-border: rgba(34,197,94,0.7);
  --legend-border: rgba(148,163,184,0.4);
  --main-bg: #ffffff;
  --main-border: rgba(203,213,225,0.9);
  --count-pill-bg: rgba(248,250,252,0.9);
  --count-pill-border: rgba(148,163,184,0.6);
  --toggle-bg: rgba(248,250,252,0.9);
  --toggle-border: rgba(148,163,184,0.6);
  --card-bg: radial-gradient(circle at top left, rgba(148,163,184,0.12), #fff);
  --card-border: rgba(226,232,240,1);
  --card-hover-border: rgba(148,163,184,1);
  --card-hover-bg: radial-gradient(circle at top left, rgba(34,197,94,0.18), #fff);
  --meta-bg: rgba(248,250,252,0.9);
  --meta-border: rgba(148,163,184,0.8);
  --category-label-bg: rgba(248,250,252,0.9);
  --category-label-border: rgba(148,163,184,0.8);
  --noresult-bg: rgba(255,255,255,0.85);
  --noresult-border: rgba(203,213,225,0.9);
  --giscus-bg: rgba(248,250,252,0.9);
  --giscus-border: rgba(59,130,246,0.5);
  --modal-bg: #ffffff;
  --modal-border: rgba(203,213,225,0.8);
  --modal-overlay: rgba(15,23,42,0.3);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  background: var(--body-bg);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  justify-content: center;
}
a { color: var(--primary-strong); text-decoration: none; }
a:hover { text-decoration: underline; }

.app-shell { width: 100%; max-width: 1240px; padding: 20px 16px 32px; }
.app-header { display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; align-items: flex-start; margin-bottom: 20px; }
.app-title-block { display: flex; flex-direction: row; align-items: center; gap: 12px; }
.badge { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 999px; background: var(--badge-bg); border: 1px solid var(--badge-border); backdrop-filter: blur(10px); font-size: 11px; color: var(--text-muted); }
.badge-dot { width: 7px; height: 7px; border-radius: 999px; background: radial-gradient(circle at 30% 30%, #dcfce7 0, #22c55e 30%, #16a34a 100%); box-shadow: 0 0 8px rgba(34,197,94,0.9); }
h1 { margin: 0; font-size: 24px; letter-spacing: 0.03em; }
.site-title { display: flex; align-items: center; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text-main); text-decoration: none; }
.brand:hover { text-decoration: none; }
.brand-logo { width: 28px; height: 28px; flex: 0 0 auto; }
.brand-text { display: inline-block; }
.subtitle { margin: 0; font-size: 13px; color: var(--text-soft); }
.header-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.pill { padding: 6px 10px; border-radius: 999px; border: 1px solid var(--pill-border); font-size: 11px; color: var(--text-muted); display: inline-flex; align-items: center; gap: 6px; background: var(--pill-bg); backdrop-filter: blur(8px); }
.theme-toggle { cursor: pointer; background: var(--pill-bg); color: var(--text-muted); }
.theme-toggle .theme-toggle-icon { font-size: 11px; line-height: 1; }
.theme-toggle .theme-toggle-label { font-size: 11px; }
.pill strong { color: var(--primary-strong); font-weight: 600; }

.layout { display: grid; grid-template-columns: 260px minmax(0,1fr); gap: 18px; align-items: flex-start; }
@media (max-width: 900px) { .layout { grid-template-columns: 1fr; } }

.about-page {
  grid-column: 1 / -1;
  background: var(--main-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--main-border);
  box-shadow: var(--shadow-soft);
  padding: 20px 18px 26px;
  max-width: 760px;
  margin: 0 auto;
}
.about-page h1 {
  margin-top: 4px;
  margin-bottom: 16px;
  font-size: 22px;
}
.about-page h2 {
  margin-top: 22px;
  margin-bottom: 10px;
  font-size: 16px;
}
.about-page p {
  margin: 0 0 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-muted);
}
.about-page ul {
  margin: 4px 0 8px 20px;
  padding: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-muted);
}
.about-page li + li {
  margin-top: 2px;
}

/* Sidebar */
.sidebar { background: var(--sidebar-bg); border-radius: var(--radius-lg); padding: 14px; border: 1px solid var(--sidebar-border); box-shadow: var(--shadow-soft); position: sticky; top: 16px; }
@media (max-width: 900px) {
  .sidebar {
    position: static;
    top: auto;
    margin-bottom: 12px;
  }
}
.sidebar-title { font-size: 13px; font-weight: 600; margin-bottom: 10px; display: flex; justify-content: space-between; align-items: center; color: var(--text-main); }
.sidebar-title span { font-size: 11px; color: var(--text-soft); font-weight: 400; }
.search-box { position: relative; margin-bottom: 12px; }
.search-input { width: 100%; padding: 8px 28px 8px 26px; border-radius: 999px; border: 1px solid var(--search-border); outline: none; background: var(--search-bg); color: var(--text-main); font-size: 12px; box-shadow: inset 0 0 0 1px rgba(15,23,42,0.2); }
.search-input::placeholder { color: var(--text-soft); }
.search-icon { position: absolute; left: 9px; top: 50%; transform: translateY(-50%); font-size: 12px; color: var(--text-soft); }
.shortcut-hint { position: absolute; right: 9px; top: 50%; transform: translateY(-50%); font-size: 10px; padding: 2px 4px; border-radius: 5px; border: 1px solid var(--search-border); color: var(--text-muted); }
.category-list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 8px; }
.category-chip { border-radius: 999px; padding: 6px 9px; border: 1px solid var(--chip-border); font-size: 11px; color: var(--text-muted); background: var(--chip-bg); cursor: pointer; display: flex; justify-content: space-between; align-items: center; transition: background 150ms, border-color 150ms, transform 100ms; }
.category-chip:hover { background: var(--chip-hover-bg); border-color: var(--chip-hover-border); transform: translateY(-1px); }
.category-chip.active { border-color: var(--primary-strong); background: var(--primary-soft); color: var(--primary-strong); }
.category-chip small { font-size: 10px; color: var(--text-soft); }
.legend { margin-top: 4px; padding-top: 6px; border-top: 1px dashed var(--legend-border); font-size: 10px; color: var(--text-soft); display: flex; flex-wrap: wrap; gap: 4px 10px; }
.legend-item { display: inline-flex; align-items: center; gap: 5px; }
.legend-dot { width: 8px; height: 8px; border-radius: 999px; }
.legend-dot.core { background: #22c55e; }
.legend-dot.model { background: #3b82f6; }
.legend-dot.tool { background: #f97316; }
.legend-dot.concept { background: #eab308; }
.legend-dot.method { background: #a855f7; }
.legend-dot.practice { background: #0ea5e9; }

.guide-links { margin-top: 10px; padding-top: 10px; border-top: 1px dashed var(--legend-border); display: flex; flex-direction: column; gap: 10px; }
.guide-links-title { font-size: 12px; font-weight: 600; color: var(--text-main); margin-bottom: -2px; }

/* Main */
.main { background: var(--main-bg); border-radius: var(--radius-lg); border: 1px solid var(--main-border); padding: 14px 14px 18px; box-shadow: var(--shadow-soft); }
.main-header { display: flex; justify-content: space-between; gap: 10px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }
.main-header-left { display: flex; flex-direction: column; gap: 4px; }
.main-heading { font-size: 14px; font-weight: 600; color: var(--text-main); display: flex; align-items: center; gap: 6px; }
.count-pill { font-size: 11px; padding: 2px 8px; border-radius: 999px; background: var(--count-pill-bg); border: 1px solid var(--count-pill-border); color: var(--text-muted); }
.main-sub { margin: 0; font-size: 11px; color: var(--text-soft); }
.main-header-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }
.view-toggle { display: flex; gap: 6px; justify-content: flex-end; }
.toggle-btn { font-size: 11px; padding: 4px 8px; border-radius: 999px; border: 1px solid var(--toggle-border); background: var(--toggle-bg); color: var(--text-muted); cursor: pointer; display: inline-flex; align-items: center; gap: 5px; }
.toggle-btn.active { border-color: var(--primary-strong); color: var(--primary-strong); background: var(--primary-soft); }
.contrib-btn { border: 1px solid transparent; border-radius: 999px; padding: 5px 12px; font-size: 11px; font-weight: 600; cursor: pointer; background: var(--primary); color: #ece9e9; box-shadow: 0 4px 14px rgba(34,197,94,0.35); transition: transform 120ms ease, box-shadow 120ms ease, opacity 120ms ease; }
.contrib-btn:hover { transform: translateY(-1px); box-shadow: 0 8px 20px rgba(34,197,94,0.45); }
.contrib-btn.secondary { background: transparent; color: var(--primary-strong); border-color: rgba(34,197,94,0.4); box-shadow: none; padding-left: 10px; padding-right: 10px; }
.contrib-btn.secondary:hover { background: var(--primary-soft); }
.contrib-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; box-shadow: none; }

.term-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px; }
.term-card { background: var(--card-bg); border-radius: var(--radius-md); padding: 8px 9px 9px; border: 1px solid var(--card-border); position: relative; overflow: hidden; transition: transform 120ms ease-out, box-shadow 120ms ease-out, border-color 120ms ease-out, background 120ms ease-out; cursor: pointer; display: block; color: inherit; text-decoration: none; }
.term-card:hover { transform: translateY(-2px) translateZ(0); box-shadow: 0 16px 40px rgba(15,23,42,0.2); border-color: var(--card-hover-border); background: var(--card-hover-bg); text-decoration: none; }
body:not(.light-theme) .term-card:hover { box-shadow: 0 16px 40px rgba(15,23,42,0.9); }
body.light-theme .term-card:hover { box-shadow: 0 16px 30px rgba(15,23,42,0.15); }
.term-header { display: flex; justify-content: space-between; align-items: baseline; gap: 4px; margin-bottom: 4px; }
.term-name { font-size: 13px; font-weight: 600; display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
.term-name .en { font-size: 11px; color: var(--text-soft); font-weight: 500; }
.term-tag { font-size: 10px; padding: 2px 6px; border-radius: 999px; border: 1px solid transparent; white-space: nowrap; }
.term-tag.core { border-color: rgba(34,197,94,0.5); color: #bbf7d0; background: rgba(22,101,52,0.5); }
.term-tag.model { border-color: rgba(59,130,246,0.5); color: #bfdbfe; background: rgba(30,64,175,0.45); }
.term-tag.tool { border-color: rgba(249,115,22,0.5); color: #fed7aa; background: rgba(154,52,18,0.45); }
.term-tag.concept { border-color: rgba(234,179,8,0.5); color: #fef9c3; background: rgba(133,77,14,0.5); }
.term-tag.method { border-color: rgba(168,85,247,0.5); color: #e9d5ff; background: rgba(88,28,135,0.45); }
.term-tag.practice { border-color: rgba(14,165,233,0.5); color: #bae6fd; background: rgba(12,74,110,0.45); }

body.light-theme .term-tag.core { color: #166534; background: rgba(187,247,208,0.7); }
body.light-theme .term-tag.model { color: #1d4ed8; background: rgba(191,219,254,0.65); }
body.light-theme .term-tag.tool { color: #c2410c; background: rgba(254,215,170,0.7); }
body.light-theme .term-tag.concept { color: #92400e; background: rgba(254,249,195,0.8); }
body.light-theme .term-tag.method { color: #581c87; background: rgba(233,213,255,0.7); }
body.light-theme .term-tag.practice { color: #0c4a6e; background: rgba(186,230,253,0.7); }
.term-meta { font-size: 12px; color: var(--text-soft); display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 4px; }
.meta-item { display: inline-flex; align-items: center; gap: 3px; padding: 1px 5px; border-radius: 999px; border: 1px solid var(--meta-border); background: var(--meta-bg); }
.term-desc { font-size: 13px; color: var(--text-muted); line-height: 1.45; margin-bottom: 4px; }
.term-foot { display: flex; justify-content: space-between; align-items: center; font-size: 12px; color: var(--text-soft); gap: 6px; }
.term-category-label { padding: 1px 5px; border-radius: 999px; border: 1px solid var(--category-label-border); background: var(--category-label-bg); font-size: 12px; }
.term-alias { font-style: italic; opacity: 0.85; font-size: 12px; }
.no-result { display: none; font-size: 12px; color: var(--text-soft); padding: 10px; border-radius: 10px; border: 1px dashed var(--noresult-border); background: var(--noresult-bg); margin-top: 4px; text-align: center; }
.no-result.show { display: block; }

/* 术语详情页简样式 */
.term-detail-header .term-detail-title { display:flex; gap:8px; align-items:baseline; margin:0 0 6px; }
.term-detail-header .term-detail-title .en { font-size:12px; color:var(--text-soft); }
.term-detail-brief { margin: 0 0 6px; color: var(--text-muted); font-size: 13px; }
.modal-chips { display:flex; flex-wrap:wrap; gap:6px; margin-bottom:6px; }
.modal-chip { font-size: 10px; padding: 3px 8px; border-radius: 999px; border: 1px solid var(--meta-border); background: var(--meta-bg); color: var(--text-muted); }
.term-actions { margin-top: 6px; display: flex; flex-direction: column; align-items: flex-start; gap: 3px; }
.term-actions-hint { font-size: 10px; color: var(--text-soft); }

/* giscus 容器底色 */
#giscus-container { margin-top: 6px; padding: 8px 6px 4px; border-radius: 10px; border: 1px solid var(--giscus-border); background: var(--giscus-bg); }

/* Modal 样式 */
.term-modal { position: fixed; top: 0; left: 0; right: 0; bottom: 0; z-index: 1000; display: flex; align-items: center; justify-content: center; padding: 20px; }
.term-modal.show { display: flex; }
.term-modal-overlay { position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: var(--modal-overlay); backdrop-filter: blur(4px); }
.term-modal-content { position: relative; background: var(--modal-bg); border-radius: var(--radius-lg); border: 1px solid var(--modal-border); box-shadow: 0 24px 60px rgba(0,0,0,0.2); max-width: 800px; width: 100%; max-height: 90vh; overflow: hidden; display: flex; flex-direction: column; z-index: 1001; }
.term-modal-close { position: absolute; top: 12px; right: 12px; width: 32px; height: 32px; border-radius: 50%; border: 1px solid var(--toggle-border); background: var(--toggle-bg); color: var(--text-main); font-size: 24px; line-height: 1; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: background 150ms, border-color 150ms; z-index: 1002; }
.term-modal-close:hover { background: rgba(31,41,55,0.9); border-color: rgba(148,163,184,0.8); }
.term-modal-body { padding: 20px; overflow-y: auto; flex: 1; }
.term-modal-loading { text-align: center; padding: 40px; color: var(--text-soft); }
.term-modal-body .term-detail { max-width: 100%; }
.term-modal-body .term-detail-header { margin-bottom: 16px; }
.term-modal-body .term-detail-body { margin-bottom: 16px; }
.term-modal-body .term-detail-footer { margin-top: 20px; padding-top: 16px; border-top: 1px solid rgba(148,163,184,0.2); }
.term-modal-body .term-detail-footer h3 { font-size: 14px; margin: 0 0 8px; color: var(--text-main); }
.term-modal-body .term-detail-footer p { font-size: 11px; color: var(--text-soft); margin: 0 0 12px; }
@media (max-width: 768px) {
  .term-modal { padding: 10px; }
  .term-modal-content { max-height: 95vh; }
  .term-modal-body { padding: 16px; }
}

/* 知识图谱 */
.graph-main .main-header { margin-bottom: 10px; }
.graph-container { position: relative; height: calc(100vh - 240px); min-height: 560px; border-radius: var(--radius-md); border: 1px solid var(--main-border); overflow: hidden; background: var(--main-bg); }
.graph-canvas { width: 100%; height: 100%; display: block; }
.graph-loading { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 12px; color: var(--text-soft); pointer-events: none; background: linear-gradient(180deg, rgba(0,0,0,0.04), rgba(0,0,0,0.0)); }
body.light-theme .graph-loading { background: linear-gradient(180deg, rgba(15,23,42,0.04), rgba(15,23,42,0.0)); }
.graph-tooltip { position: absolute; max-width: 320px; padding: 8px 10px; border-radius: 12px; border: 1px solid var(--toggle-border); background: var(--pill-bg); color: var(--text-main); box-shadow: var(--shadow-soft); font-size: 12px; z-index: 20; display: none; pointer-events: none; backdrop-filter: blur(6px); }
.graph-tooltip .t-title { font-weight: 650; font-size: 12px; margin-bottom: 2px; }
.graph-tooltip .t-sub { font-size: 11px; color: var(--text-soft); margin-bottom: 4px; }
.graph-tooltip .t-meta { font-size: 11px; color: var(--text-muted); }
.graph-controls { margin-top: 10px; padding-top: 10px; border-top: 1px dashed var(--legend-border); display: flex; flex-direction: column; gap: 8px; }
.graph-toggle { display: inline-flex; align-items: center; gap: 8px; font-size: 11px; color: var(--text-muted); user-select: none; }
.graph-toggle input { accent-color: var(--primary-strong); }
.graph-fab { position: absolute; top: 10px; right: 10px; display: flex; gap: 8px; z-index: 30; }
.graph-fab-group { display: inline-flex; border-radius: 999px; border: 1px solid var(--toggle-border); background: var(--toggle-bg); overflow: hidden; }
.graph-fab-btn { border-radius: 999px; width: 34px; height: 34px; border: 1px solid var(--toggle-border); background: var(--toggle-bg); color: var(--text-muted); cursor: pointer; display: inline-flex; align-items: center; justify-content: center; padding: 0; }
.graph-fab-group .graph-fab-btn { border: none; width: 34px; height: 34px; border-radius: 0; }
.graph-fab-group .graph-fab-btn + .graph-fab-btn { border-left: 1px solid rgba(148,163,184,0.25); }
.graph-fab-btn svg { display: block; }
.graph-fab-btn:hover { border-color: var(--chip-hover-border); background: var(--chip-hover-bg); color: var(--text-main); }
.graph-fab-group .graph-fab-btn:hover { background: rgba(148,163,184,0.10); }
.graph-fab-btn:active { transform: translateY(1px); }

/* 全屏（原生 Fullscreen API） */
.graph-container:fullscreen { height: 100vh; min-height: 0; border-radius: 0; border: none; }
.graph-container:fullscreen .graph-fab { top: 14px; right: 14px; }

/* 全屏（CSS 兜底） */
body.graph-fs .app-header,
body.graph-fs .sidebar,
body.graph-fs .graph-main .main-header { display: none; }
body.graph-fs .app-shell { padding: 0; max-width: none; }
body.graph-fs .layout { margin: 0; grid-template-columns: 1fr; padding: 0; }
body.graph-fs .graph-main { padding: 0; border: none; box-shadow: none; border-radius: 0; }
body.graph-fs .graph-container { position: fixed; inset: 0; height: 100vh; min-height: 0; border-radius: 0; border: none; z-index: 5000; }
@media (max-width: 900px) {
  .graph-container { height: 65vh; min-height: 420px; }
}