/* Quiet, evidence-led presentation shared with the portfolio homepage. */
:root {
  --ink:#202b3c; --text:#3d485b; --muted:#647084; --line:#e1e5eb;
  --paper:#fff; --wash:#f7f8fa; --teal:#415fe1; --mist:#edf0ff; --yellow:#edf0ff;
  font-family:"Avenir Next","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--text); background:var(--wash);
}
body { background:var(--wash); }
h1,h2,h3,h4 { font-family:inherit; color:var(--ink); }
::selection { color:var(--ink); background:#dfe5ff; }
a:focus-visible,button:focus-visible,[tabindex]:focus-visible { outline-color:var(--teal); }
.skip { background:var(--paper); border:1px solid var(--line); border-radius:8px; }
.section-width { width:min(1120px,calc(100% - 96px)); }
.site-header { width:min(1200px,calc(100% - 96px)); height:92px; border-color:var(--line); gap:34px; }
.brand { font-size:23px; font-weight:650; letter-spacing:-.8px; }
.brand-bars i { background:var(--teal); }
.site-header nav { font-size:12px; gap:26px; color:var(--muted); }
.site-header nav a:hover,.plain-link:hover { color:var(--teal); }
.author { font-size:12px; }
.author>span { color:var(--muted); }
.site-header .language-switch { padding:3px; border-color:var(--line); border-radius:9px; background:var(--paper); }
.site-header .language-switch button { color:var(--muted); border-radius:6px; min-height:32px; }
.site-header .language-switch button[aria-pressed=true] { color:var(--teal); background:var(--mist); }
.site-header .language-switch button:hover:not([aria-pressed=true]) { background:var(--wash); }
.site-header .language-switch button:focus-visible { outline-color:var(--teal); }
.hero { grid-template-columns:1.04fr 1fr; gap:72px; padding-block:76px 64px; align-items:center; }
.project-category,.section-caption { color:var(--teal); font-size:12px; margin-bottom:18px; }
.hero h1,html[lang] .hero h1 { font-family:"Avenir Next","PingFang SC",sans-serif; font-size:clamp(38px,4.05vw,55px); font-weight:600; line-height:1.17; letter-spacing:-2px; margin-bottom:26px; max-width:540px; text-wrap:balance; }
html[lang=zh-CN] .hero h1 { line-height:1.4; letter-spacing:-1.6px; }
.hero-intro,html[lang] .hero-intro { font-size:16px; line-height:1.8; max-width:450px; color:var(--text); }
.hero-context { font-size:12px; line-height:1.9; max-width:440px; }
.hero-actions { gap:24px; margin-top:28px; }
.button { min-height:46px; border-radius:10px; font-size:12px; padding:11px 20px; font-weight:600; }
.button:hover { filter:none; }
.primary { background:var(--teal); color:#fff; border-color:var(--teal); }
.primary:hover { background:#3452d2; }
.secondary { background:var(--paper); color:var(--ink); border-color:var(--line); }
.secondary:hover { background:var(--mist); border-color:#cdd5fb; }
.plain-link { color:var(--muted); }
.evidence-scene { background:var(--paper); border:1px solid var(--line); border-radius:14px; box-shadow:none; font-size:12px; }
.scene-header { background:var(--wash); color:var(--muted); border-bottom:1px solid var(--line); padding:16px 22px; font-size:11px; }
.scene-status { color:var(--teal); font-size:10px; }
.scene-note { padding:24px 24px 0; }
.note-label { color:var(--muted); font-size:10px; margin-bottom:7px; }
.scene-note p { color:var(--muted); font-size:16px; line-height:1.75; }
.struck-note { color:var(--muted); font-size:10px; }
.evidence-path { color:var(--teal); padding:16px 25px; font-size:10px; }
.evidence-path i { background:#b4c0f5; }
.evidence-path i::after { border-color:#b4c0f5; }
.source-slip { background:var(--mist); border-left-color:var(--teal); margin:0 22px; padding:17px 19px; border-radius:0 8px 8px 0; box-shadow:none; }
.source-tab,.source-slip a { color:var(--teal); }
.source-slip p { color:var(--text); font-size:12px; line-height:1.85; }
.scene-conclusion { padding:24px; }
.scene-conclusion h2 { font-size:16px; font-weight:600; line-height:1.7; }
.scene-conclusion p { color:var(--muted); font-size:11px; line-height:1.85; }
.scene-footer { color:var(--teal); border-color:var(--line); padding:15px 23px; gap:16px; }
.coverage-strip { border-color:var(--line); padding-block:21px; font-size:10px; }
.coverage-strip p { font-size:11px; }
.coverage-strip i { background:#b5bece; }
.cases-section { padding-block:72px; }
.section-heading { margin-bottom:30px; }
.section-heading h2,.scope-intro h2,html[lang] .section-heading h2,html[lang] .scope-intro h2 { font-family:"Avenir Next","PingFang SC",sans-serif; font-size:29px; font-weight:600; letter-spacing:-.9px; line-height:1.4; }
.section-heading>p { max-width:360px; line-height:1.85; }
.case-feature { background:var(--paper); color:var(--text); border:1px solid var(--line); border-radius:14px; grid-template-columns:1.15fr 1fr; }
.case-story { padding:36px; }
.case-type { color:var(--teal); font-size:11px; }
.case-story h3,html[lang] .case-story h3 { font-family:inherit; color:var(--ink); font-size:25px; font-weight:600; line-height:1.4; letter-spacing:-.6px; }
.case-story>p { color:var(--muted); font-size:12px; }
.case-story .case-question,html[lang] .case-story .case-question { color:var(--text); font-size:15px; line-height:1.85; }
.study-counts { gap:34px; padding-top:23px; border-top:1px solid var(--line); margin-top:26px; }
.study-counts strong { color:var(--ink); font-size:26px; font-weight:550; }
.study-counts span { color:var(--muted); font-size:10px; }
.case-actions { gap:22px; color:var(--teal); }
.case-feature .light { color:#fff; background:var(--teal); border-color:var(--teal); }
.case-feature .light:hover { background:#3452d2; }
.case-feature a:focus-visible,.case-feature button:focus-visible { outline-color:var(--teal); }
.case-reasoning { background:var(--wash); border-color:var(--line); padding:36px; }
.reasoning-heading { color:var(--muted); font-size:11px; }
.price-observations { background:var(--paper); border:1px solid var(--line); border-radius:10px; padding:19px 22px; }
.price-observations>span,.price-observations small { color:var(--muted); }
.price-observations strong { color:var(--ink); font-size:34px; font-weight:500; }
.price-observations i { color:#b5bece; }
.reasoning-result h4 { color:var(--ink); font-size:17px; font-weight:600; }
.reasoning-result p { color:var(--muted); font-size:12px; line-height:1.9; }
.case-boundary,html[lang] .case-boundary { border-color:var(--line); transform:none; margin-top:22px; padding-top:18px; }
.case-boundary span,.case-boundary p { color:var(--muted); }
.case-boundary p { font-size:11px; line-height:1.85; }
.case-secondary { gap:56px; padding-top:48px; }
.meeting-story h3 { font-family:inherit; font-size:24px; font-weight:600; letter-spacing:-.6px; }
.meeting-story>p { font-size:12px; color:var(--muted); line-height:1.9; }
.meeting-story .meeting-result { color:var(--ink); font-size:14px; }
.revision-demo { border-color:var(--line); border-radius:12px; background:var(--paper); }
.revision-heading { padding-top:20px; }
.revision-heading h4 { font-size:13px; font-weight:600; }
.revision-tabs { border-color:var(--line); gap:22px; }
.revision-tabs button { min-height:44px; font-size:11px; }
.revision-tabs button[aria-selected=true] { color:var(--teal); border-color:var(--teal); }
.revision-row.before p { color:var(--muted); }
.revision-row.after { background:#edf5f1; color:#32705b; border-radius:7px; }
.revision-row.after>span { color:#32705b; }
.comparison-link { color:var(--teal); padding-block:13px 18px; }
.method-section { background:var(--paper); border-color:var(--line); padding-block:62px; }
.method-steps { gap:30px; }
.method-steps li { border-color:var(--line); padding-top:20px; }
.step-order { color:var(--teal); }
.method-steps h3,html[lang] .method-steps h3 { font-family:inherit; font-size:15px; font-weight:600; line-height:1.6; }
.method-steps p { color:var(--muted); font-size:12px; line-height:1.85; }
.method-steps a { color:var(--teal); font-size:10px; }
.scope-section { gap:76px; padding-block:72px; }
.scope-intro>p:not(.section-caption) { font-size:12px; line-height:1.9; }
.scope-detail dl>div { border-color:var(--line); padding-block:16px; }
.scope-detail dt { font-size:11px; }
.scope-detail dd { font-size:11px; color:var(--muted); line-height:1.9; }
.status-dot { background:#32705b; }
.status-dot.pending { background:#8d6a27; }
.site-footer { border-color:var(--line); font-size:10px; padding-block:28px; }
.site-footer .brand { color:var(--ink); }
@media(max-width:1060px) {
  .section-width,.site-header { width:calc(100% - 56px); }
  .hero { gap:38px; }
  .site-header,html[lang] .site-header { gap:24px; }
  .site-header nav,html[lang] .site-header nav { gap:20px; }
  .case-story,.case-reasoning { padding:28px; }
  .case-secondary { gap:34px; }
  .scope-section { gap:48px; }
}
@media(max-width:760px) {
  .section-width,.site-header { width:calc(100% - 40px); }
  .site-header,html[lang] .site-header { height:auto; min-height:86px; padding-block:19px; gap:18px; }
  .site-header nav,html[lang] .site-header nav { gap:21px; font-size:11px; }
  .site-header .brand { font-size:22px; }
  .hero { grid-template-columns:1fr; padding-block:44px; gap:35px; }
  .hero h1,html[lang] .hero h1 { font-size:40px; letter-spacing:-1.4px; max-width:520px; }
  html[lang=zh-CN] .hero h1 { font-size:38px; line-height:1.35; }
  .hero-intro,html[lang] .hero-intro { font-size:15px; }
  .hero-context { max-width:480px; }
  .evidence-scene { max-width:560px; margin-right:0; box-shadow:none; }
  .coverage-strip { padding-block:19px; }
  .cases-section { padding-block:44px; }
  .section-heading h2,.scope-intro h2,html[lang] .section-heading h2,html[lang] .scope-intro h2 { font-size:25px; }
  .section-heading>p { max-width:460px; }
  .case-feature { grid-template-columns:1fr; }
  .case-story,.case-reasoning { padding:25px; }
  .case-story h3,html[lang] .case-story h3 { font-size:23px; }
  .case-reasoning { border-top:1px solid var(--line); }
  .case-secondary { grid-template-columns:1fr; gap:27px; padding-top:34px; }
  .case-boundary,html[lang] .case-boundary { margin-top:24px; }
  .method-section { padding-block:44px; }
  .method-steps { gap:26px 24px; }
  .method-steps p { font-size:11px; }
  .scope-section { grid-template-columns:1fr; gap:30px; padding-block:44px; }
  .site-footer { padding-block:24px; }
}
@media(max-width:400px) {
  .hero h1,html[lang] .hero h1 { font-size:36px; }
  .hero-actions { gap:20px; }
  .hero-actions .plain-link { font-size:11px; }
  .site-header,html[lang] .site-header { gap:14px; }
  .scene-note,.scene-conclusion { padding-inline:21px; }
  .source-slip { margin-inline:18px; }
  .case-story,.case-reasoning { padding:22px; }
  .case-actions { gap:18px; }
  .method-steps { grid-template-columns:1fr; gap:24px; }
}
@media print {
  body,.method-section,.case-reasoning { background:#fff; }
  .site-header nav,.hero-actions,.language-switch { display:none; }
  .case-feature,.evidence-scene { box-shadow:none; }
}