/* ==========================================================================
   OPC出海 — design system
   Light-first, developer-documentation feel. Restrained, high signal, no
   decoration that carries no information.
   ========================================================================== */

/* ------------------------------------------------------------- tokens */
:root {
  --bg:        #ffffff;
  --bg-soft:   #f7f8fa;
  --bg-card:   #ffffff;
  --bg-inset:  #f2f4f7;
  --line:      #e4e7ec;
  --line-soft: #eef0f4;

  --fg:        #101828;
  --fg-muted:  #5a6474;
  --fg-faint:  #98a2b3;

  --accent:      #2455e6;
  --accent-soft: #eef2ff;
  --ok:          #067647;
  --ok-soft:     #ecfdf3;
  --warn:        #b54708;
  --warn-soft:   #fffaeb;
  --info:        #175cd3;
  --info-soft:   #eff8ff;

  --radius:    10px;
  --radius-sm: 7px;
  --radius-lg: 16px;
  --maxw:      1140px;
  --gut:       20px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

:root[data-theme="dark"] {
  --bg:        #0b0e14;
  --bg-soft:   #10141c;
  --bg-card:   #121722;
  --bg-inset:  #1a2030;
  --line:      #222a3a;
  --line-soft: #1a2130;

  --fg:        #e8edf6;
  --fg-muted:  #98a3b6;
  --fg-faint:  #6b7688;

  --accent:      #7aa2ff;
  --accent-soft: #16203a;
  --ok:          #6ee7a8;
  --ok-soft:     #10241c;
  --warn:        #f5c069;
  --warn-soft:   #2a1f0c;
  --info:        #8ab4ff;
  --info-soft:   #131d33;
}

/* -------------------------------------------------------------- reset */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
[hidden] { display: none !important; }

body {
  font-family: var(--sans);
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { padding-left: 1.15em; }
button { font: inherit; color: inherit; }

h1, h2, h3, h4 { line-height: 1.25; letter-spacing: -.018em; font-weight: 650; }
h1 { font-size: clamp(1.9rem, 4.4vw, 2.9rem); letter-spacing: -.028em; }
h2 { font-size: 1.32rem; }
h3 { font-size: 1.02rem; }

.ic { width: 16px; height: 16px; flex-shrink: 0; }
.mt-2 { margin-top: 8px; } .mt-4 { margin-top: 16px; } .mt-6 { margin-top: 26px; }
.muted { color: var(--fg-muted); }
.small { font-size: 13px; line-height: 1.6; }
.note {
  display: flex; gap: 9px; align-items: flex-start;
  padding: 13px 15px; border-radius: var(--radius);
  background: var(--warn-soft); color: var(--warn);
  border: 1px solid color-mix(in srgb, var(--warn) 24%, transparent);
  font-size: 14px;
}
.center { text-align: center; }
.center-actions { justify-content: center; }

/* ------------------------------------------------------------ layout */
.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gut); }
.wrap.narrow { max-width: 660px; }
.section { padding: 62px 0; }
.section-alt { background: var(--bg-soft); border-block: 1px solid var(--line-soft); }

.grid { display: grid; gap: 14px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(min(268px, 100%), 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(min(215px, 100%), 1fr)); }
.grid-side { display: grid; gap: 34px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 940px) { .grid-side { grid-template-columns: minmax(0, 1fr) 296px; } }
.grid-side > * { min-width: 0; }

/* ------------------------------------------------------------ header */
.skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--accent); color: #fff; padding: 10px 14px; border-radius: 0 0 var(--radius-sm) 0;
}
.skip:focus { left: 0; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line-soft);
}
.header-inner { display: flex; align-items: center; gap: 14px; height: 58px; }

.brand { font-weight: 700; font-size: 16.5px; letter-spacing: -.02em; flex-shrink: 0; }
.brand-dot { color: var(--accent); }

.nav { display: flex; align-items: center; gap: 2px; margin-left: auto; min-width: 0; overflow-x: auto; scrollbar-width: none; }
.nav::-webkit-scrollbar { display: none; }
.nav a {
  padding: 6px 10px; border-radius: var(--radius-sm); white-space: nowrap;
  font-size: 14px; color: var(--fg-muted); transition: color .14s, background .14s;
}
.nav a:hover { color: var(--fg); background: var(--bg-soft); }
.nav a[aria-current="page"] { color: var(--fg); font-weight: 600; }

.icon-btn {
  width: 34px; height: 34px; flex-shrink: 0;
  display: grid; place-items: center;
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--bg-card); cursor: pointer;
  transition: border-color .14s, color .14s;
}
.icon-btn:hover { border-color: var(--fg-faint); }
.menu-toggle { display: none; margin-left: auto; }

@media (max-width: 900px) {
  .nav {
    position: absolute; left: var(--gut); right: var(--gut); top: calc(100% + 8px);
    flex-direction: column; align-items: stretch;
    background: var(--bg-card); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 8px; gap: 2px;
    box-shadow: 0 16px 40px -18px rgba(16, 24, 40, .28);
    display: none;
  }
  .nav.open { display: flex; }
  .nav a { padding: 10px 12px; font-size: 15px; }
  .menu-toggle { display: grid; margin-left: auto; }
}

/* --------------------------------------------------------------- hero */
.hero { padding: 76px 0 58px; border-bottom: 1px solid var(--line-soft); }
.kicker {
  font-family: var(--mono); font-size: 11.5px; font-weight: 600;
  letter-spacing: .09em; text-transform: uppercase; color: var(--accent);
  margin-bottom: 14px;
}
.hero h1 { max-width: 16ch; }
.hero-lede { margin-top: 20px; font-size: 16.5px; color: var(--fg-muted); max-width: 56ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.hero-objective {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 22px;
  font-size: 13.5px; color: var(--fg-muted);
  background: var(--bg-soft); border: 1px solid var(--line-soft);
  padding: 7px 13px; border-radius: 999px;
}

/* ------------------------------------------------------------ buttons */
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 10px 17px; border-radius: var(--radius-sm);
  font-size: 14.5px; font-weight: 600; cursor: pointer;
  border: 1px solid transparent; transition: all .14s;
  white-space: nowrap;
}
.btn .ic { width: 15px; height: 15px; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { border-color: var(--line); color: var(--fg); background: var(--bg-card); }
.btn-ghost:hover { border-color: var(--fg-faint); }
.btn-block { width: 100%; justify-content: center; }
.btn:disabled, .btn[aria-disabled="true"] { opacity: .5; cursor: not-allowed; }
.page-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }

/* -------------------------------------------------------------- cards */
.card {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px;
  transition: border-color .14s, transform .14s;
}
.card h2, .card h3 { margin-bottom: 8px; }
.card p { font-size: 14px; color: var(--fg-muted); }
a.card:hover { border-color: var(--fg-faint); }

.tool-card { display: flex; flex-direction: column; gap: 10px; }
.tool-card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.tool-card-top h3 { min-width: 0; overflow-wrap: anywhere; }
.tool-card-top .badge { flex-shrink: 0; }
.tool-card h3 { font-size: 15.5px; margin: 0; }
.tool-card-foot { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; }

.model-card { display: flex; flex-direction: column; gap: 8px; }
.cat-card { display: flex; flex-direction: column; gap: 8px; }
.cat-ic { color: var(--accent); }
.cat-count { font-family: var(--mono); font-size: 12px; color: var(--fg-faint); }
.model-detail { display: flex; flex-direction: column; gap: 10px; }
.guide-card { display: flex; flex-direction: column; gap: 9px; }
.card-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13.5px; font-weight: 600; color: var(--accent); margin-top: auto;
}
.card-link .ic { width: 14px; height: 14px; }

.empty { display: flex; flex-direction: column; align-items: center; gap: 8px; text-align: center; padding: 44px 20px; }

/* ------------------------------------------------------------ badges */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 11.5px; font-weight: 600; letter-spacing: .01em;
  padding: 2.5px 8px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--fg-muted); background: var(--bg-soft);
  white-space: nowrap;   /* never break a status label mid-word */
}
.badge .ic { width: 11px; height: 11px; }
.trust-tested { color: var(--ok); background: var(--ok-soft); border-color: color-mix(in srgb, var(--ok) 26%, transparent); }
.trust-verified { color: var(--info); background: var(--info-soft); border-color: color-mix(in srgb, var(--info) 26%, transparent); }
.trust-pending { color: var(--fg-faint); background: var(--bg-inset); }
.badge-affiliate { color: var(--warn); background: var(--warn-soft); border-color: color-mix(in srgb, var(--warn) 26%, transparent); }
.badge-sponsored { color: var(--warn); background: var(--warn-soft); border-color: color-mix(in srgb, var(--warn) 26%, transparent); }
.badge-plain { color: var(--fg-faint); }

.tag {
  display: inline-block; font-size: 12px; padding: 2px 8px;
  border-radius: var(--radius-sm); background: var(--bg-inset); color: var(--fg-muted);
}
.tag-affiliate, .tag-sponsored { background: var(--warn-soft); color: var(--warn); }
.tag-row { display: flex; flex-wrap: wrap; gap: 6px; }
.trust-inline { font-size: 11.5px; color: var(--fg-faint); }

.status {
  align-self: flex-start; font-size: 11.5px; font-weight: 600;
  padding: 2.5px 8px; border-radius: 999px;
  background: var(--bg-inset); color: var(--fg-muted);
}
.status-planned { background: var(--info-soft); color: var(--info); }

/* ---------------------------------------------------------- sections */
.sec-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 20px; flex-wrap: wrap; margin-bottom: 26px;
}
.sec-head h2 { font-size: 1.42rem; }
.sec-lede { margin-top: 9px; font-size: 14.5px; color: var(--fg-muted); max-width: 62ch; }
.sec-link {
  display: inline-flex; align-items: center; gap: 6px; flex-shrink: 0;
  font-size: 14px; font-weight: 600; color: var(--accent);
}
.sec-link .ic { width: 14px; height: 14px; }

/* -------------------------------------------------------- page heads */
.page-head { padding: 52px 0 34px; border-bottom: 1px solid var(--line-soft); }
.crumb { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; font-size: 13px; color: var(--fg-faint); margin-bottom: 16px; }
.crumb a:hover { color: var(--accent); }
.crumb-sep { opacity: .5; }
.page-lede { margin-top: 16px; font-size: 16px; color: var(--fg-muted); max-width: 64ch; }

/* -------------------------------------------------------- stage rail */
.stage-rail {
  display: grid; gap: 8px; list-style: none; padding: 0;
  grid-template-columns: repeat(auto-fit, minmax(min(158px, 100%), 1fr));
}
.stage-rail-inline { margin: 16px 0 26px; }
.stage-item {
  display: grid; grid-template-columns: auto minmax(0, 1fr);
  gap: 2px 8px; align-items: baseline;
  padding: 11px 13px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--bg-card); font-size: 14px;
}
.stage-item.is-current { border-color: var(--accent); }
.stage-num { font-family: var(--mono); font-size: 11.5px; color: var(--accent); font-weight: 600; grid-column: 1; }
.stage-item a { font-weight: 600; grid-column: 2; min-width: 0; }
.stage-en { font-size: 10.5px; color: var(--fg-faint); grid-column: 2; letter-spacing: .04em; }

/* --------------------------------------------------------- timeline */
.timeline { list-style: none; padding: 0; display: grid; gap: 4px; }
.tl-item {
  display: grid; grid-template-columns: 52px minmax(0, 1fr);
  gap: 18px; padding: 24px 0; border-top: 1px solid var(--line-soft);
}
.tl-item:first-child { border-top: 0; }
.tl-num { font-family: var(--mono); font-size: 20px; font-weight: 700; color: var(--accent); letter-spacing: -.03em; }
.tl-body h2 { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; font-size: 1.16rem; margin-bottom: 9px; }
.tl-en { font-family: var(--mono); font-size: 11.5px; font-weight: 500; color: var(--fg-faint); text-transform: uppercase; letter-spacing: .06em; }
.tl-body p { color: var(--fg-muted); font-size: 14.5px; max-width: 68ch; }
.tl-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 13px; }
.tl-body .card-link { margin-top: 13px; }

/* ------------------------------------------------------------- prose */
.prose { min-width: 0; }
.prose h2 { margin: 32px 0 12px; padding-top: 4px; }
.prose h2:first-child { margin-top: 0; }
.prose p { margin-bottom: 14px; color: var(--fg-muted); }
.prose ul, .prose ol { margin-bottom: 16px; color: var(--fg-muted); }
.prose li { margin-bottom: 6px; }
.prose a { color: var(--accent); }
.prose a:hover { text-decoration: underline; }
.prose code { font-family: var(--mono); font-size: .9em; background: var(--bg-inset); padding: 1px 5px; border-radius: 4px; }
.prose .note { margin: 18px 0; }
.prose .note a { color: inherit; text-decoration: underline; }

.facts { display: grid; gap: 13px; margin: 18px 0 26px; }
.facts-sm { gap: 9px; }
.facts > div { display: grid; grid-template-columns: 118px minmax(0, 1fr); gap: 12px; align-items: baseline; }
.facts dt { font-size: 13px; color: var(--fg-faint); }
.facts dd { font-size: 14px; min-width: 0; overflow-wrap: anywhere; }
.facts a { color: var(--accent); }

.editorial-pending {
  display: flex; gap: 11px; align-items: flex-start;
  padding: 15px 17px; border-radius: var(--radius);
  background: var(--bg-soft); border: 1px dashed var(--line);
  margin: 16px 0 22px;
}
.editorial-pending p { margin: 0; font-size: 14px; color: var(--fg-muted); }
.editorial-pending strong { color: var(--fg); }

.outline { list-style: none; padding: 0; counter-reset: o; }
.outline li { display: flex; gap: 12px; padding: 9px 0; border-bottom: 1px solid var(--line-soft); }
.outline-num { font-family: var(--mono); font-size: 12px; color: var(--accent); flex-shrink: 0; padding-top: 3px; }

.stack-list, .link-list, .commerce-list { list-style: none; padding: 0; }
.stack-list li { padding: 9px 0; border-bottom: 1px solid var(--line-soft); font-size: 14px; }
.stack-list li:last-child, .link-list li:last-child, .commerce-list li:last-child { border-bottom: 0; }
.stack-list li a { font-weight: 600; color: var(--accent); }
.stack-list li span { display: block; font-size: 12.5px; color: var(--fg-faint); }
.link-list li { padding: 7px 0; font-size: 14px; border-bottom: 1px solid var(--line-soft); }
.link-list a { color: var(--accent); }
.commerce-list li { display: flex; justify-content: space-between; padding: 8px 0; font-size: 14px; border-bottom: 1px solid var(--line-soft); }
.commerce-list span { color: var(--fg-muted); }
.commerce-card { border-color: color-mix(in srgb, var(--warn) 22%, var(--line)); }

/* --------------------------------------------------------- callout */
.callout {
  display: grid; gap: 24px; align-items: center;
  padding: 30px; border-radius: var(--radius-lg);
  background: var(--bg-soft); border: 1px solid var(--line);
}
@media (min-width: 800px) { .callout { grid-template-columns: minmax(0, 1fr) auto; } }
.callout h2 { font-size: 1.35rem; margin-bottom: 12px; }
.callout p { color: var(--fg-muted); font-size: 14.5px; max-width: 60ch; }
.callout-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.transparency {
  padding: 18px 20px; border-radius: var(--radius);
  background: var(--bg-soft); border: 1px solid var(--line-soft);
}
.transparency p { display: flex; gap: 9px; align-items: flex-start; font-size: 13.5px; color: var(--fg-muted); }
.transparency a { color: var(--accent); }

/* ------------------------------------------------------------ forms */
.consult-form { display: grid; gap: 15px; }
.field { display: grid; gap: 6px; }
.field label { font-size: 13.5px; font-weight: 600; }
.field input, .field select, .field textarea {
  width: 100%; padding: 10px 12px; font: inherit; font-size: 14.5px;
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--bg-inset); color: var(--fg-muted);
}
.field input:disabled, .field select:disabled, .field textarea:disabled { cursor: not-allowed; }
.demo-notice {
  display: flex; gap: 11px; align-items: flex-start; margin-bottom: 18px;
  background: var(--warn-soft); border-color: color-mix(in srgb, var(--warn) 24%, transparent);
}
.demo-notice p { margin: 0; color: var(--warn); font-size: 13.5px; }
.demo-notice strong { color: var(--warn); }

/* ---------------------------------------------------------- go page */
.go-page { padding: 70px 0; }
.go-card { margin-top: 24px; display: grid; gap: 14px; }
.go-target { display: flex; align-items: center; gap: 10px; font-size: 15px; color: var(--fg); }
.go-host { font-family: var(--mono); font-size: 13px; color: var(--fg-faint); }
.go-note {
  display: flex; gap: 9px; align-items: flex-start;
  padding: 12px 14px; border-radius: var(--radius-sm);
  background: var(--bg-soft); border: 1px solid var(--line-soft);
  font-size: 13.5px; color: var(--fg-muted);
}
.go-note-affiliate { background: var(--warn-soft); color: var(--warn); border-color: color-mix(in srgb, var(--warn) 24%, transparent); }
.go-actions { display: flex; flex-wrap: wrap; gap: 10px; }

/* ------------------------------------------------------------ stack */
.stack-stage { margin-bottom: 42px; }
.stack-stage-head { display: flex; align-items: baseline; gap: 11px; margin-bottom: 16px; }
.stack-stage-head h2 { font-size: 1.16rem; }

/* ----------------------------------------------------------- footer */
.site-footer { border-top: 1px solid var(--line-soft); background: var(--bg-soft); padding: 48px 0 24px; margin-top: 20px; }
.footer-grid { display: grid; gap: 32px; grid-template-columns: repeat(auto-fit, minmax(min(190px, 100%), 1fr)); }
@media (min-width: 900px) { .footer-grid { grid-template-columns: 1.7fr repeat(3, 1fr); } }
.footer-name { font-weight: 700; font-size: 16px; }
.footer-tagline { margin-top: 8px; font-size: 14px; color: var(--fg); }
.footer-note { margin-top: 10px; font-size: 13px; color: var(--fg-faint); max-width: 42ch; }
.footer-col h4 {
  font-size: 11.5px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  color: var(--fg-faint); margin-bottom: 12px;
}
.footer-col ul { list-style: none; padding: 0; display: grid; gap: 7px; }
.footer-col a { font-size: 13.5px; color: var(--fg-muted); }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px;
  margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--line);
  font-size: 12.5px; color: var(--fg-faint);
}
.footer-legal a:hover { color: var(--accent); }

/* ------------------------------------------------- accessibility */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

@media (max-width: 620px) {
  :root { --gut: 16px; }
  .section { padding: 46px 0; }
  .hero { padding: 52px 0 42px; }
  .facts > div { grid-template-columns: 1fr; gap: 3px; }
}

/* ==========================================================================
   STEP 2 — decision system components
   ========================================================================== */

/* ------------------------------------------------ empty / pending states */
/* Absence of verified data is rendered as an explicit, deliberate state.
   Never as a blank area, and never filled with invented copy. */
.unknown {
  color: var(--fg-faint);
  font-style: normal;
  border-bottom: 1px dashed var(--line);
}
.pending-block {
  display: flex; gap: 11px; align-items: flex-start;
  padding: 15px 17px; border-radius: var(--radius);
  background: var(--bg-soft); border: 1px solid var(--line);
  margin: 0 0 24px;
}
.pending-block p { margin: 0 0 5px; font-size: 13.8px; color: var(--fg-muted); }
.pending-block p:last-child { margin-bottom: 0; }
.pending-block strong { color: var(--fg); }
.pending-block .ic { margin-top: 3px; color: var(--fg-faint); }
.pending-warn { background: var(--warn-soft); border-color: color-mix(in srgb, var(--warn) 22%, transparent); }
.pending-warn .ic, .pending-warn p, .pending-warn strong { color: var(--warn); }
.pending-inline {
  display: flex; gap: 9px; align-items: flex-start;
  padding: 11px 14px; border-radius: var(--radius-sm);
  background: var(--bg-soft); border: 1px dashed var(--line);
  margin: 12px 0 20px;
}
.pending-inline p { margin: 0; font-size: 13.5px; color: var(--fg-muted); }
.pending-inline a { color: var(--accent); }
.pending-inline .ic { margin-top: 3px; color: var(--fg-faint); flex-shrink: 0; }

/* -------------------------------------------------------- research labels */
.rs-unreviewed  { color: var(--fg-faint); background: var(--bg-inset); }
.rs-researching { color: var(--info);     background: var(--info-soft); border-color: color-mix(in srgb, var(--info) 26%, transparent); }
.rs-verified    { color: var(--ok);       background: var(--ok-soft);   border-color: color-mix(in srgb, var(--ok) 26%, transparent); }
.rs-tested      { color: #fff; background: var(--ok); border-color: var(--ok); }
.rs-review      { color: var(--info);     background: var(--info-soft); border-color: color-mix(in srgb, var(--info) 26%, transparent); }

.research-legend {
  padding: 20px 22px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg-soft);
}
.legend-head { display: flex; align-items: center; gap: 8px; font-weight: 650; font-size: 14px; margin-bottom: 14px; }
.research-legend ul { list-style: none; padding: 0; display: grid; gap: 9px; margin-bottom: 14px; }
.research-legend li { display: flex; gap: 12px; align-items: baseline; font-size: 13.5px; color: var(--fg-muted); }
.research-legend li .badge { flex-shrink: 0; }

/* ------------------------------------------------------------- tool cards */
.tool-status-bar { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.tool-card h3 a { color: inherit; }
.tool-card h3 a:hover { color: var(--accent); }
.tool-list { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(min(270px, 100%), 1fr)); }

/* ---------------------------------------------------------------- filters */
.browse { display: grid; gap: 22px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 980px) { .browse:has(.filter-bar:not([hidden])) { grid-template-columns: 236px minmax(0, 1fr); align-items: start; } }
.filter-bar {
  display: grid; gap: 18px; align-content: start;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg-card); padding: 16px;
  position: sticky; top: 72px;
}
@media (max-width: 979px) { .filter-bar { position: static; } }
.filter-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.filter-title { display: flex; align-items: center; gap: 7px; font-weight: 650; font-size: 14px; }
.filter-group { border: 0; padding: 0; margin: 0; }
.filter-group legend {
  font-size: 11px; font-weight: 700; letter-spacing: .07em; text-transform: uppercase;
  color: var(--fg-faint); padding: 0 0 9px;
}
.filter-options { display: grid; gap: 2px; }
.filter-option {
  display: flex; align-items: center; gap: 9px; cursor: pointer;
  padding: 6px 8px; border-radius: var(--radius-sm); font-size: 13.5px;
}
.filter-option:hover { background: var(--bg-soft); }
.filter-option input { accent-color: var(--accent); flex-shrink: 0; }
.filter-option span { flex: 1; min-width: 0; }
.filter-option em { font-style: normal; font-size: 11.5px; color: var(--fg-faint); font-family: var(--mono); }
.filter-status { font-size: 12.5px; color: var(--fg-muted); border-top: 1px solid var(--line-soft); padding-top: 12px; }
.empty-filter { font-size: 14px; color: var(--fg-muted); padding: 28px; text-align: center; border: 1px dashed var(--line); border-radius: var(--radius); }
.btn-sm { padding: 5px 11px; font-size: 12.5px; }

/* ------------------------------------------------------------- fit blocks */
.fit-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr)); margin: 14px 0 18px; }
.fit-block { padding: 14px 16px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--bg-card); }
.fit-block h3 { display: flex; align-items: center; gap: 7px; font-size: 13.5px; margin-bottom: 9px; }
.fit-block ul { margin: 0; padding-left: 1.1em; font-size: 13.8px; color: var(--fg-muted); }
.fit-block li { margin-bottom: 4px; }
.fit-yes { border-color: color-mix(in srgb, var(--ok) 24%, var(--line)); }
.fit-yes h3 { color: var(--ok); }
.fit-no { border-color: color-mix(in srgb, var(--warn) 24%, var(--line)); }
.fit-no h3 { color: var(--warn); }

/* ------------------------------------------------------------- stage page */
.stage-rail-wrap { overflow-x: auto; padding-bottom: 4px; }
.stage-facts { display: grid; gap: 12px; margin: 16px 0 18px; }
.stage-facts > div { display: grid; grid-template-columns: 118px minmax(0, 1fr); gap: 12px; align-items: baseline; }
.stage-facts dt { font-size: 12.5px; color: var(--fg-faint); }
.stage-facts dd { font-size: 14.2px; color: var(--fg-muted); }
.stage-facts dd.is-hard { color: var(--warn); font-weight: 600; }
.stage-facts dd.is-soft { color: var(--ok); font-weight: 600; }
.tl-short { font-weight: 500; color: var(--fg) !important; }
.questions { background: var(--bg-soft); border: 1px solid var(--line-soft); border-radius: var(--radius); padding: 14px 16px; margin: 16px 0; }
.questions-head { display: flex; align-items: center; gap: 7px; font-size: 12.5px; font-weight: 650; color: var(--fg-muted); margin-bottom: 8px; }
.questions ul { margin: 0; padding-left: 1.1em; font-size: 13.8px; color: var(--fg-muted); }
.stage-links { display: grid; gap: 10px; margin: 16px 0; }
.stage-link-group { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.stage-link-group > span:first-child { font-size: 12px; color: var(--fg-faint); min-width: 84px; }
.stage-relevance { border-left: 2px solid var(--line); padding-left: 14px; margin: 16px 0; }
.stage-relevance p { font-size: 13.6px; color: var(--fg-muted); margin-bottom: 6px; }
.stage-notes { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr)); margin-top: 26px; }
.stage-note { border-top: 2px solid var(--line); padding-top: 12px; }
.stage-note strong { font-size: 14.5px; }
.stage-note p { font-size: 13.4px; color: var(--fg-muted); margin-top: 5px; }
.entry-card { display: flex; flex-direction: column; gap: 7px; }
.entry-card h3 { font-size: 15px; }
.entry-card .stage-num { font-size: 12px; }
.entry-card .card-link { margin-top: auto; padding-top: 8px; }

/* ------------------------------------------------------------ journey */
.journey { list-style: none; padding: 0; counter-reset: j; }
.journey-item { padding: 18px 0; border-top: 1px solid var(--line-soft); }
.journey-item:first-child { border-top: 0; padding-top: 6px; }
.journey-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
.journey-head h3 { font-size: 15px; }
.journey-num { font-family: var(--mono); font-size: 12px; color: var(--accent); font-weight: 600; }
.journey-item > p { font-size: 14.2px; color: var(--fg-muted); }
.journey-cols { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr)); margin-top: 12px; }
.journey-cols ul { margin: 6px 0 0; padding-left: 1.1em; font-size: 13.6px; color: var(--fg-muted); }
.journey-cols li { margin-bottom: 4px; }
.label-do, .label-delay, .block-label, .dim-label, .q-label {
  font-size: 11px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--fg-faint);
}
.label-do { color: var(--warn); }
.label-delay { color: var(--ok); }
.model-facts { display: grid; gap: 10px; margin: 12px 0; }
.model-facts > div span { font-size: 11.5px; color: var(--fg-faint); text-transform: uppercase; letter-spacing: .05em; }
.model-facts > div p { font-size: 13.6px; margin-top: 3px; }
.model-money { display: flex; align-items: center; gap: 7px; font-size: 13.2px; color: var(--fg-muted); }
.model-money .ic { width: 14px; height: 14px; color: var(--fg-faint); }
.tag-stack { background: var(--accent-soft); color: var(--accent); }

/* -------------------------------------------------------------- stacks */
.stack-card { display: flex; flex-direction: column; gap: 9px; }
.stack-card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.stack-card-top h3 { font-size: 15.5px; margin: 0; }
.stack-card-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; }
.status-published { background: var(--ok-soft); color: var(--ok); }
.stack-intro { font-size: 15.5px; color: var(--fg) !important; }
.callout-plain { background: var(--bg-soft); }
.callout-plain h2 { margin-bottom: 10px; }

.layer-list { list-style: none; padding: 0; }
.layer-list li { display: flex; gap: 12px; align-items: baseline; padding: 10px 0; border-bottom: 1px solid var(--line-soft); }
.layer-list li:last-child { border-bottom: 0; }
.layer-state { margin-left: auto; font-size: 11.5px; color: var(--fg-faint); }

.stack-layers { list-style: none; padding: 0; display: grid; gap: 0; }
.layer { padding: 26px 0; border-top: 1px solid var(--line); }
.layer:first-child { border-top: 0; }
.layer-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.layer-head h3 { font-size: 17px; }
.layer-num { font-family: var(--mono); font-size: 13px; font-weight: 700; color: var(--accent); }
.layer-en { font-family: var(--mono); font-size: 10.5px; color: var(--fg-faint); text-transform: uppercase; letter-spacing: .07em; }
.layer-cat { margin-left: auto; font-size: 12px; }
.layer-cat a { color: var(--accent); }
.layer-q { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(min(210px, 100%), 1fr)); margin-bottom: 16px; }
.layer-q > div { background: var(--bg-soft); border: 1px solid var(--line-soft); border-radius: var(--radius-sm); padding: 12px 14px; }
.layer-q p { font-size: 13.6px; color: var(--fg-muted); margin-top: 5px; }
.layer-q p.is-hard { color: var(--warn); font-weight: 600; }
.layer-q p.is-soft { color: var(--ok); font-weight: 600; }
.layer-block { margin: 14px 0; }
.layer-block ul { margin: 7px 0 0; padding-left: 1.1em; font-size: 13.8px; color: var(--fg-muted); }
.layer-block li { margin-bottom: 4px; }
.layer-china { border-left: 2px solid var(--warn); padding-left: 13px; }
.layer-china p { font-size: 13.8px; color: var(--fg-muted); margin-top: 5px; }
.layer-relevance { border-left: 2px solid var(--line); padding-left: 13px; margin: 12px 0; }
.layer-relevance p { font-size: 13.4px; color: var(--fg-muted); margin-bottom: 4px; }
.layer-tools { margin: 16px 0; }
.tool-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 9px 0; }
.tool-chip {
  display: inline-flex; flex-direction: column; gap: 2px;
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 7px 11px; background: var(--bg-card); transition: border-color .14s;
}
.tool-chip:hover { border-color: var(--accent); }
.tool-chip-name { font-size: 13.5px; font-weight: 600; }
.tool-chip-state { font-size: 11px; color: var(--fg-faint); }
.layer-next { display: flex; gap: 8px; align-items: flex-start; font-size: 13px; color: var(--fg-faint); border-top: 1px dashed var(--line); padding-top: 12px; margin-top: 14px; }
.layer-next .ic { margin-top: 3px; flex-shrink: 0; }

.option-card { display: flex; flex-direction: column; gap: 9px; }
.option-card h3 { font-size: 15.5px; }
.option-fits { font-size: 13.4px; }
.tradeoff-list { list-style: none; padding: 0; display: grid; gap: 5px; }
.tradeoff-list li { font-size: 13.2px; color: var(--fg-muted); padding-left: 15px; position: relative; }
.tradeoff-list li::before { content: '—'; position: absolute; left: 0; color: var(--fg-faint); }

/* ------------------------------------------------------ category roles */
.role-table { display: grid; gap: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.role-row { display: grid; grid-template-columns: 118px minmax(0, 1fr); border-bottom: 1px solid var(--line-soft); }
.role-row:last-child { border-bottom: 0; }
.role-key { padding: 10px 13px; font-family: var(--mono); font-size: 12px; color: var(--fg-faint); background: var(--bg-soft); }
.role-val { padding: 10px 13px; font-size: 13.6px; color: var(--fg-muted); }
@media (max-width: 560px) { .role-row { grid-template-columns: 1fr; } .role-key { border-bottom: 1px solid var(--line-soft); } }

/* -------------------------------------------------------- payments page */
.pay-card { display: flex; flex-direction: column; gap: 10px; }
.pay-card h2 { font-size: 16.5px; }
.pay-who { font-size: 13.5px; }
.pay-consider ul { margin: 7px 0 0; padding-left: 1.1em; font-size: 13.4px; color: var(--fg-muted); }
.pay-consider li { margin-bottom: 4px; }
.qa { margin-bottom: 26px; }
.qa h2 { font-size: 16px; }
.misconceptions li { margin-bottom: 9px; }

/* ------------------------------------------------------------ disclosure */
.state-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr)); margin: 18px 0 24px; }
.state-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; background: var(--bg-card); }
.state-card h3 { font-size: 14px; margin-bottom: 7px; }
.state-card p { font-size: 13.4px; color: var(--fg-muted); margin: 0; }

/* ------------------------------------------------------- sources / dims */
.source-list { list-style: none; padding: 0; }
.source-list li { display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; padding: 8px 0; border-bottom: 1px solid var(--line-soft); font-size: 13.6px; }
.source-list a { color: var(--accent); }
.source-meta { font-size: 11.5px; color: var(--fg-faint); font-family: var(--mono); }
.decision-dims { display: grid; gap: 12px; margin: 14px 0; }
.decision-dims > div { display: grid; grid-template-columns: 110px minmax(0, 1fr); gap: 12px; align-items: baseline; }
.empty-state { display: flex; flex-direction: column; align-items: center; gap: 8px; text-align: center; padding: 44px 20px; }

/* --------------------------------------------------------- mobile fixes */
@media (max-width: 620px) {
  .stage-facts > div, .decision-dims > div { grid-template-columns: 1fr; gap: 3px; }
  .layer-head { gap: 8px; }
  .layer-cat { margin-left: 0; width: 100%; }
  .filter-bar { position: static; }
  .tool-list { grid-template-columns: 1fr; }
  .stage-rail { grid-template-columns: repeat(auto-fit, minmax(min(140px, 100%), 1fr)); }
}

/* ==========================================================================
   STEP 3 — verified provenance + guide reading experience
   ========================================================================== */

.verified-banner {
  display: flex; gap: 11px; align-items: flex-start;
  padding: 15px 17px; border-radius: var(--radius);
  background: var(--ok-soft); border: 1px solid color-mix(in srgb, var(--ok) 26%, transparent);
  margin: 0 0 24px;
}
.verified-banner .ic { color: var(--ok); margin-top: 3px; flex-shrink: 0; }
.verified-banner p { margin: 0 0 5px; font-size: 13.8px; color: var(--fg-muted); }
.verified-banner p:last-child { margin-bottom: 0; }
.verified-banner strong { color: var(--ok); }

/* source list, grouped by what each source backs */
.source-list li { align-items: flex-start; }
.source-supports {
  display: flex; flex-wrap: wrap; gap: 4px; margin-top: 4px; width: 100%;
}
.source-supports span {
  font-family: var(--mono); font-size: 10.5px; color: var(--fg-faint);
  background: var(--bg-inset); border-radius: 4px; padding: 1px 5px;
}

/* ------------------------------------------------------------- guides */
.guide-meta {
  display: flex; gap: 8px; align-items: flex-start;
  font-size: 13.2px; color: var(--fg-muted);
  background: var(--bg-soft); border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm); padding: 11px 14px; margin-bottom: 24px;
}
.guide-meta .ic { margin-top: 3px; flex-shrink: 0; color: var(--fg-faint); }

.guide-body { counter-reset: gs; }
.guide-section { margin-bottom: 8px; }
.guide-section h2 {
  font-size: 1.22rem; margin: 34px 0 12px;
  padding-top: 18px; border-top: 1px solid var(--line-soft);
}
.guide-section:first-child h2 { border-top: 0; padding-top: 0; margin-top: 0; }

.time-sensitive {
  margin: 40px 0 8px; padding: 20px 22px;
  border: 1px solid color-mix(in srgb, var(--warn) 24%, transparent);
  border-radius: var(--radius); background: var(--warn-soft);
}
.time-sensitive h2 { font-size: 1.05rem; margin: 0 0 8px; color: var(--warn); }
.time-sensitive > p { font-size: 13.4px; color: var(--warn); margin-bottom: 14px; }
.time-sensitive ul { list-style: none; padding: 0; margin: 0; }
.time-sensitive li { padding: 12px 0; border-top: 1px solid color-mix(in srgb, var(--warn) 18%, transparent); }
.time-sensitive li:first-child { border-top: 0; padding-top: 0; }
.time-sensitive li > p { font-size: 13.8px; color: var(--fg); margin: 0 0 5px; }
.ts-source { font-size: 12px !important; color: var(--fg-muted) !important; }
.ts-source a { color: var(--accent); overflow-wrap: anywhere; }

/* long URLs must never break the layout */
.prose a, .link-list a, .source-list a { overflow-wrap: anywhere; }

/* STEP 4 — one primary action per stage, at most two secondary links */
.stage-next {
  display: flex; flex-wrap: wrap; align-items: center; gap: 14px;
  margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line-soft);
}
.stage-secondary { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; font-size: 13.2px; }
.stage-secondary .sec-label { color: var(--fg-faint); font-size: 12px; }
.stage-secondary a { color: var(--accent); }
.stage-secondary a:hover { text-decoration: underline; }

/* stack layer tool chips: verified records read differently from candidates */
.tool-chip.is-verified { border-color: color-mix(in srgb, var(--ok) 34%, var(--line)); }
.tool-chip.is-verified .tool-chip-state { color: var(--ok); }
.tool-chip-note {
  display: block; margin-top: 4px; max-width: 34ch;
  font-size: 12px; color: var(--fg-muted); line-height: 1.5;
}
.tool-chips { align-items: stretch; }
.tool-chip { max-width: 100%; }

/* ==========================================================================
   STEP 4 — trust layer (methodology) + stale-data notice
   ========================================================================== */
.method-intro {
  display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(min(120px, 100%), 1fr));
  margin: 0 0 30px; padding: 20px 22px;
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-soft);
}
.method-intro > div { display: flex; flex-direction: column; gap: 3px; }
.method-num { font-family: var(--mono); font-size: 24px; font-weight: 700; color: var(--accent); letter-spacing: -.03em; }
.method-label { font-size: 12.5px; color: var(--fg-muted); line-height: 1.4; }

.method-commerce { display: grid; gap: 12px; margin: 16px 0 22px; }
.method-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; background: var(--bg-card); }
.method-card h3 { display: flex; align-items: center; gap: 9px; flex-wrap: wrap; font-size: 14px; margin-bottom: 7px; }
.method-card p { font-size: 13.4px; color: var(--fg-muted); margin: 0; }
.method-state {
  font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 999px;
  background: var(--ok-soft); color: var(--ok); border: 1px solid color-mix(in srgb, var(--ok) 26%, transparent);
}
.method-off { background: var(--bg-inset); color: var(--fg-faint); border-color: var(--line); }

.stale-notice {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 12px 15px; border-radius: var(--radius-sm);
  background: var(--warn-soft); border: 1px solid color-mix(in srgb, var(--warn) 26%, transparent);
  margin: 0 0 20px; font-size: 13.4px; color: var(--warn);
}
.stale-notice .ic { margin-top: 3px; flex-shrink: 0; }
.stale-notice a { color: inherit; text-decoration: underline; }