/* src/style.css — 内部研究备忘录视觉语言
   v0.5 桑基图为绝对主角，左侧细窄导览栏 */

:root {
  --bg:        #0B0D10;
  --bg-elev:  #11151B;
  --bg-card:  #151A21;
  --line:     #1F262F;
  --line-2:   #2A323D;
  --ink:      #E8E6E1;
  --ink-dim:  #8A8F98;
  --ink-mute: #757B85;   /* bumped from #4A4F58 for WCAG AA 4.5:1 on #0B0D10 */

  --amber:     #FF7A45;   /* US & Canada / L2 Chip */
  --amber-2:   #E8956A;   /* Canada 单独 */
  --crimson:   #E0567A;   /* Mainland China / L4 Model */
  --slate:     #7BA7BC;   /* Europe / L3 Computing Infra */
  --moss:      #9CC68B;   /* Taiwan / L5 Application */
  --moss-2:    #B8DBA7;   /* South Korea */
  --moss-3:    #CFE6BD;   /* Japan */
  --ash:       #8A8F98;   /* Others / L1 Energy */

  --rail-w:   180px;

  --serif: 'Fraunces', 'Source Serif Pro', Georgia, serif;
  --sans:  'Inter', -apple-system, 'Helvetica Neue', sans-serif;
  --mono:  'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

/* ===== 整体两栏 ==================================================== */
.shell {
  display: grid;
  grid-template-columns: var(--rail-w) 1fr;
  min-height: 100vh;
}

/* ===== 左侧细窄导览栏 ============================================= */
.rail {
  border-right: 1px solid var(--line);
  padding: 22px 16px;
  position: sticky; top: 0; align-self: start;
  height: 100vh; overflow: auto;
  background: var(--bg);
}

.rail-stamps {
  display: flex; flex-direction: column; gap: 4px;
  margin-bottom: 18px;
}
.stamp {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.18em;
  color: var(--ink-mute);
  text-transform: uppercase;
  border: 1px solid var(--line);
  padding: 4px 6px;
  display: inline-block;
}

.rail-eyebrow {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.22em;
  color: var(--ink-mute);
  text-transform: uppercase;
  margin: 18px 0 8px;
}
.rail-eyebrow:first-of-type { margin-top: 4px; }

.rail-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 22px;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
  font-variation-settings: "opsz" 144, "SOFT" 50;
}
.rail-title em { font-style: italic; color: var(--amber); }

.rail-hint {
  display: block;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
  text-transform: uppercase;
  margin-top: 2px;
  font-weight: 400;
}

.rail-foot {
  margin-top: 28px;
  font-family: var(--mono);
  font-size: 9.5px;
  color: var(--ink-mute);
  letter-spacing: 0.06em;
  line-height: 1.7;
}
.rail-foot a {
  color: var(--ink-dim);
  text-decoration: underline;
  text-decoration-style: dotted;
}

/* control-group (vertical in rail) */
.control-group {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
}
.control-group button {
  appearance: none;
  background: transparent;
  border: 0;
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 8px 10px;
  cursor: pointer;
  text-align: left;
}
.control-group:not(.vertical) button { border-right: 1px solid var(--line); }
.control-group:not(.vertical) button:last-child { border-right: 0; }
.control-group.vertical { flex-direction: column; width: 100%; }
.control-group.vertical button { border-bottom: 1px solid var(--line); }
.control-group.vertical button:last-child { border-bottom: 0; }
.control-group button.is-active {
  background: var(--ink);
  color: var(--bg);
}
.control-group button:hover:not(.is-active) { color: var(--ink); }

/* legend */
.legend {
  display: flex; flex-direction: column; gap: 4px;
}
.legend span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
  text-transform: uppercase;
}
.legend i {
  width: 10px; height: 10px; display: inline-block; flex: 0 0 10px;
}
.legend-proxy {
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px dashed var(--line);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--ink-dim);
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: help;
}
.legend-proxy .proxy-glyph {
  color: var(--ink);
  font-size: 12px;
  line-height: 1;
}

/* ===== 主区 ========================================================= */
.main {
  padding: 28px 36px 60px;
  min-width: 0;     /* 关键：让 grid 子项可以缩 */
}

/* 顶部：标题 + KPI */
.report-head {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: end;
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
  margin-bottom: 14px;
}
.kicker {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--ink-mute);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 36px;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0;
  font-variation-settings: "opsz" 144;
}
.title em { font-style: italic; color: var(--amber); }

.kpis {
  display: grid;
  grid-template-columns: repeat(4, minmax(110px, auto));
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 2px;
}
.kpi {
  padding: 10px 14px;
  border-right: 1px solid var(--line);
}
.kpi:last-child { border-right: 0; }
.kpi-label {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.18em;
  color: var(--ink-mute);
  text-transform: uppercase;
  margin-bottom: 4px;
}
.kpi-value {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--ink);
  letter-spacing: 0.02em;
}

/* focus line */
.focus-line {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line);
}

/* ===== 桑基图主舞台（绝对主角） ===================================== */
.sankey-stage {
  /* 占视口 ~78% 高度，外加一些余量留给下方双表 */
  width: 100%;
  height: 78vh;
  min-height: 560px;
  background:
    repeating-linear-gradient(0deg, transparent 0 39px, rgba(255,255,255,0.018) 39px 40px),
    var(--bg);
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: visible;
  position: relative;
  margin-bottom: 28px;
}
/* svg 撑满整个 stage；viewBox 内部已经预留了左右标签区 */
#sankey {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}

#sankey .node { transition: opacity 200ms ease; cursor: pointer; }
#sankey .node:hover { filter: brightness(1.25); }
#sankey .link { transition: opacity 200ms ease, stroke-width 200ms ease; }

/* 估值代理节点（未盈利，按一级市场估值折算）—— 虚线描边 + 降透明度 */
#sankey .node.is-proxy { cursor: help; }
#sankey .node.is-proxy:hover { filter: none; opacity: 0.95; }
#sankey .link.is-proxy { cursor: help; }
#sankey .lbl-name.is-proxy { fill: var(--ink-dim); font-style: italic; }
#sankey .lbl-name.is-proxy::before { content: '▒ '; }
#sankey .lbl-name {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  fill: var(--ink);
  paint-order: stroke fill;
  stroke: var(--bg);
  stroke-width: 3px;
  stroke-linejoin: round;
  transition: opacity 200ms ease;
}
#sankey .lbl-name::before { content: attr(data-name); }
#sankey .is-dim  { opacity: 0.12 !important; }
#sankey .is-focus { opacity: 1 !important; }
#sankey .node.is-focus { stroke: var(--ink); stroke-width: 1.5; }

/* ===== 紧贴桑基：三条 observation 大字号 callout =================== */
.observations {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 0 0 24px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(232,230,225,0.018), transparent);
}
.observations .obs {
  padding: 18px 22px 18px 22px;
  border-right: 1px solid var(--line);
}
.observations .obs:last-child { border-right: none; }
.observations .obs-glyph {
  display: flex; align-items: baseline; gap: 10px;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  color: var(--ink-mute);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.observations .obs-num { color: var(--amber); font-weight: 500; }
.observations .obs-title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 22px;
  line-height: 1.18;
  color: var(--ink);
  margin: 0 0 6px 0;
  letter-spacing: -0.01em;
}
.observations .obs-body {
  font-family: var(--sans);
  font-size: 12px;
  line-height: 1.55;
  color: var(--ink-dim);
  margin: 0;
}
.observations .obs-body strong {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 500;
}
.observations .obs-body em {
  color: var(--ink-dim);
  font-style: italic;
}
@media (max-width: 1100px) {
  .observations { grid-template-columns: 1fr; }
  .observations .obs { border-right: none; border-bottom: 1px solid var(--line); }
  .observations .obs:last-child { border-bottom: none; }
}

/* ===== 桑基图下方的双表 ============================================= */
.below { margin-top: 0; }
.tables {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 28px;
  margin-bottom: 28px;
}
.t-block { min-width: 0; }
.t-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--line);
  padding-bottom: 6px;
  margin-bottom: 8px;
}
.t-eyebrow {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--ink-mute);
  text-transform: uppercase;
}
.t-hint {
  font-family: var(--mono);
  font-size: 9.5px;
  color: var(--ink-mute);
  letter-spacing: 0.08em;
}

.ledger-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 11.5px;
}
.ledger-table th, .ledger-table td {
  border-bottom: 1px dashed var(--line);
  padding: 6px 4px;
  text-align: left;
}
.ledger-table th {
  color: var(--ink-mute);
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 9.5px;
}
.ledger-table td.num { text-align: right; color: var(--ink-dim); }
.ledger-table td.name { color: var(--ink); }
.ledger-table tbody tr:hover td { background: rgba(255, 122, 69, 0.04); }

/* ===== 三段批注 ===================================================== */
.notes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  border-top: 1px solid var(--line);
  padding-top: 22px;
}
.notes article h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 17px;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}
.notes article p {
  font-size: 13px;
  color: var(--ink-dim);
  margin: 0;
}
.notes article .glyph {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--ink-mute);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.notes article .num {
  display: inline-block;
  font-family: var(--mono);
  color: var(--amber);
  margin-right: 6px;
}

/* ===== 响应式 ======================================================= */
@media (max-width: 1280px) {
  .title { font-size: 30px; line-height: 1.05; }
  .report-head { grid-template-columns: 1fr; align-items: start; }
  .kpis { grid-template-columns: repeat(4, 1fr); margin-top: 12px; }
  .kpis .kpi { border-right: 1px solid var(--line); }
  .kpis .kpi:last-child { border-right: 0; }
}
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .rail {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .main { padding: 22px 18px 40px; }
  .title { font-size: 24px; }
  .kpis { grid-template-columns: repeat(2, 1fr); margin-top: 12px; }
  .kpis .kpi:nth-child(2) { border-right: 0; }
  .kpis .kpi:nth-child(1),
  .kpis .kpi:nth-child(2) { border-bottom: 1px solid var(--line); }
  .kpis .kpi:nth-child(3),
  .kpis .kpi:nth-child(4) { border-top: 1px solid var(--line); }
  .kpis .kpi:nth-child(3) { border-left: 0; }
  .tables { grid-template-columns: 1fr; }
  .notes { grid-template-columns: 1fr; }
  .sankey-stage { height: 70vh; min-height: 480px; }
}

/* ===== 桑基图过渡 & 工具提示 ========================================= */
.sankey-stage.is-switching {
  opacity: 0.45;
  transition: opacity 280ms cubic-bezier(0.33, 1, 0.68, 1);
}

/* 浮动工具提示 */
.sankey-tooltip {
  position: absolute;
  pointer-events: none;
  z-index: 100;
  background: var(--bg-card);
  border: 1px solid var(--line-2);
  border-radius: 2px;
  padding: 8px 12px;
  font-family: var(--mono);
  font-size: 10.5px;
  line-height: 1.5;
  color: var(--ink);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 180ms ease, transform 180ms ease;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}
.sankey-tooltip.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.sankey-tooltip .tt-name {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  margin-bottom: 2px;
}
.sankey-tooltip .tt-stat {
  color: var(--ink-dim);
  font-size: 10px;
}
.sankey-tooltip .tt-val {
  color: var(--amber);
}

/* 键盘快捷键提示 (rail) */
.kb-hints {
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  text-transform: uppercase;
  line-height: 1.8;
}
.kb-hints kbd {
  display: inline-block;
  font-family: var(--mono);
  font-size: 9px;
  padding: 1px 5px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--bg-elev);
  color: var(--ink-dim);
  margin: 0 2px;
}

/* focus-line 动态状态 */
.focus-line.is-active {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* KPI 值过渡 */
.kpi-value {
  transition: color 280ms ease;
}
.kpi-value.is-updated {
  color: var(--amber);
}

/* ===== prefers-reduced-motion ====================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html, body { scroll-behavior: auto; }
  .sankey-stage.is-switching { opacity: 1; transition: none; }
  .sankey-tooltip { transition: none; }
}