:root {
  --paper: #f5f3ee;
  --paper-deep: #ebe8df;
  --ink: #1d201c;
  --muted: #74776f;
  --line: #d8d8ce;
  --orange: #f06e3a;
  --orange-deep: #cb5123;
  --mint: #c9e7d8;
  --green: #317a56;
  --blue: #4c75c8;
  --panel: rgba(255, 255, 252, .72);
  --shadow: 0 22px 70px rgba(57, 52, 38, .08);
  --radius: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: 'Avenir Next', 'PingFang SC', 'Helvetica Neue', sans-serif; }
body::selection { background: var(--ink); color: var(--paper); }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
.shell { width: min(1180px, calc(100% - 64px)); margin: 0 auto; }
.noise { position: fixed; inset: 0; pointer-events: none; opacity: .035; z-index: 50; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.6'/%3E%3C/svg%3E"); }
.site-header { height: 86px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 11px; font-size: 15px; font-weight: 800; letter-spacing: -.03em; }
.brand-mark { width: 29px; height: 29px; display: flex; align-items: end; justify-content: center; gap: 3px; padding: 5px; border-radius: 9px; background: var(--ink); transform: rotate(-6deg); }
.brand-mark span { display: block; width: 4px; border-radius: 4px; background: var(--orange); }
.brand-mark span:nth-child(1) { height: 9px; opacity: .65; }.brand-mark span:nth-child(2) { height: 15px; }.brand-mark span:nth-child(3) { height: 12px; opacity: .8; }
.nav-links { display: flex; gap: 34px; color: var(--muted); font-size: 12px; font-weight: 700; }
.nav-links a { transition: color .2s ease; }.nav-links a:hover { color: var(--ink); }
.live-chip, .synthetic-label { display: inline-flex; align-items: center; gap: 7px; color: var(--green); font-family: 'DM Mono', monospace; font-size: 10px; letter-spacing: .04em; text-transform: uppercase; }
.live-chip { padding: 8px 12px; border: 1px solid #b9d7c4; border-radius: 100px; background: rgba(201, 231, 216, .28); }
.live-chip i, .synthetic-label i, .result-bottom i { width: 6px; height: 6px; display: inline-block; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(49, 122, 86, .12); }
.hero { min-height: 572px; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 50px; padding: 76px 0 58px; }
.eyebrow { display: flex; align-items: center; gap: 12px; margin: 0 0 22px; color: var(--muted); font-family: 'SF Mono', 'Menlo', monospace; font-size: 10px; letter-spacing: .08em; text-transform: uppercase; }
.eyebrow span { color: var(--orange-deep); }.eyebrow b { padding-left: 12px; border-left: 1px solid var(--line); font-family: 'Noto Sans SC', sans-serif; font-weight: 700; letter-spacing: 0; }
h1, h2, h3, p { margin-top: 0; }.hero h1, h2 { margin-bottom: 25px; font-size: clamp(44px, 6vw, 76px); line-height: 1.07; letter-spacing: -.075em; font-weight: 900; }
h1 em, h2 em { color: var(--orange); font-style: normal; }.hero-lede { max-width: 500px; margin-bottom: 34px; color: var(--muted); font-size: 16px; line-height: 1.85; }
.hero-actions { display: flex; align-items: center; gap: 24px; }.button { border: 0; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }.button:hover { transform: translateY(-2px); }
.button-primary { display: inline-flex; align-items: center; gap: 18px; padding: 15px 18px 15px 20px; color: #fff; border-radius: 13px; background: var(--ink); font-size: 13px; font-weight: 800; box-shadow: 0 12px 24px rgba(29, 32, 28, .14); }.button-primary span { color: var(--orange); font-size: 19px; }.text-link { color: var(--muted); font-size: 13px; font-weight: 700; }.text-link span { margin-left: 8px; color: var(--orange); }
.hero-orbit { height: 390px; position: relative; display: grid; place-items: center; }.orbit { position: absolute; border: 1px solid #cbcdc3; border-radius: 50%; transform: rotate(-24deg); }.orbit-one { width: 330px; height: 220px; }.orbit-two { width: 260px; height: 350px; border-color: #dbb59d; transform: rotate(36deg); }.orbit-core { width: 144px; height: 144px; display: grid; place-items: center; border-radius: 43% 57% 51% 49% / 47% 43% 57% 53%; background: var(--orange); color: #fff; text-align: center; box-shadow: 0 24px 45px rgba(240, 110, 58, .23); transform: rotate(-8deg); }.orbit-core strong { position: relative; font-size: 18px; line-height: 1.22; letter-spacing: -.07em; }.core-pulse { position: absolute; width: 17px; height: 17px; margin: -92px 0 0 94px; border: 3px solid var(--paper); border-radius: 50%; background: var(--green); }
.orbit-tag { position: absolute; padding: 8px 12px; color: var(--muted); border: 1px solid var(--line); border-radius: 100px; background: rgba(255,255,252,.7); font-family: 'DM Mono', monospace; font-size: 10px; }.tag-one { top: 50px; right: 70px; }.tag-two { bottom: 67px; left: 54px; }.tag-three { bottom: 27px; right: 85px; }.orbit-dot { position: absolute; width: 9px; height: 9px; border-radius: 50%; background: var(--blue); }.dot-one { top: 91px; left: 111px; }.dot-two { bottom: 81px; right: 113px; background: var(--orange); }.dot-three { top: 168px; right: 44px; background: var(--green); }
.signal-strip { display: grid; grid-template-columns: auto 1fr auto 1fr auto auto; align-items: center; gap: 22px; padding: 22px 0 30px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }.signal-item { display: flex; align-items: center; gap: 12px; }.signal-number { color: var(--orange); font-family: 'DM Mono', monospace; font-size: 11px; }.signal-item b, .signal-item small { display: block; }.signal-item b { margin-bottom: 3px; font-size: 12px; }.signal-item small { color: var(--muted); font-size: 10px; }.signal-line { height: 1px; background: var(--line); }.demo-note { margin: 0; color: var(--muted); font-size: 10px; white-space: nowrap; }.demo-note span { color: var(--orange); margin-right: 5px; }
.section { padding-top: 134px; }.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 60px; margin-bottom: 48px; }.section-heading h2 { margin-bottom: 0; font-size: clamp(38px, 5vw, 62px); }.section-intro { max-width: 310px; margin-bottom: 5px; color: var(--muted); font-size: 13px; line-height: 1.8; }.compact-heading { margin-bottom: 48px; }
.scenario-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 15px; }.scenario-tab { padding: 11px 15px; border: 1px solid var(--line); border-radius: 100px; background: transparent; cursor: pointer; color: var(--muted); font-size: 11px; font-weight: 700; transition: all .2s ease; }.scenario-tab:hover { border-color: #a6aaa0; color: var(--ink); }.scenario-tab.is-active { color: #fff; border-color: var(--ink); background: var(--ink); }
.demo-grid { display: grid; grid-template-columns: .93fr 1.07fr; gap: 15px; }.panel { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); box-shadow: var(--shadow); }.source-panel { min-height: 458px; padding: 27px; }.run-panel { min-height: 458px; display: flex; flex-direction: column; padding: 27px; background: #e9ede6; }.panel-topline { display: flex; justify-content: space-between; align-items: center; }.panel-label { color: var(--muted); font-family: 'DM Mono', monospace; font-size: 10px; letter-spacing: .08em; }.source-meta { display: flex; align-items: center; gap: 10px; margin: 36px 0 17px; color: var(--muted); font-family: 'DM Mono', monospace; font-size: 10px; }.platform-badge { padding: 5px 8px; color: var(--blue); border: 1px solid #b9c7e5; border-radius: 5px; background: #edf2ff; font-family: 'Noto Sans SC', sans-serif; font-weight: 700; }.source-panel h3 { max-width: 460px; margin-bottom: 13px; font-size: 24px; line-height: 1.28; letter-spacing: -.055em; }.source-body { min-height: 50px; margin-bottom: 25px; color: var(--muted); font-size: 12px; line-height: 1.75; }.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; padding: 13px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }.metric b, .metric span { display: block; }.metric b { margin-bottom: 4px; font-family: 'DM Mono', monospace; font-size: 14px; }.metric span { color: var(--muted); font-size: 10px; }.metric.is-missing b { color: var(--orange); font-size: 12px; }.source-footer { display: flex; justify-content: space-between; gap: 10px; padding-top: 20px; color: var(--muted); font-size: 10px; }.source-footer strong { overflow: hidden; color: var(--ink); font-family: 'DM Mono', monospace; font-size: 10px; font-weight: 400; text-overflow: ellipsis; white-space: nowrap; }.source-tags { display: flex; gap: 7px; flex-wrap: wrap; margin-top: 19px; }.source-tag { padding: 6px 9px; color: var(--muted); border-radius: 5px; background: var(--paper-deep); font-size: 10px; }
.run-state { color: var(--orange-deep); font-family: 'DM Mono', monospace; font-size: 10px; }.trace-list { flex: 1; margin: 28px 0 23px; }.trace-item { min-height: 55px; position: relative; display: grid; grid-template-columns: 27px 20px 1fr auto; align-items: center; gap: 10px; color: #949a91; }.trace-item:not(:last-child)::after { content: ''; position: absolute; top: 42px; left: 13px; width: 1px; height: 23px; background: #cbd0c7; }.trace-item.is-current { color: var(--ink); }.trace-item.is-done { color: var(--green); }.trace-index { font-family: 'DM Mono', monospace; font-size: 10px; }.trace-icon { font-size: 18px; line-height: 1; }.trace-item.is-current .trace-icon { color: var(--orange); }.trace-item.is-done .trace-icon { color: var(--green); }.trace-copy b, .trace-copy small { display: block; }.trace-copy b { font-size: 12px; }.trace-copy small { margin-top: 3px; color: inherit; opacity: .78; font-size: 10px; }.trace-status { font-family: 'DM Mono', monospace; font-size: 9px; }.trace-item.is-done .trace-status { color: var(--green); }.button-run { width: 100%; padding: 14px; border-radius: 12px; color: #fff; background: var(--orange); font-size: 12px; font-weight: 800; box-shadow: 0 10px 20px rgba(240,110,58,.16); }.button-run:hover { background: var(--orange-deep); }.button-run:disabled { cursor: wait; opacity: .7; transform: none; }.run-symbol { margin-right: 8px; font-size: 10px; }.run-footnote { margin: 13px 0 0; color: var(--muted); text-align: center; font-family: 'DM Mono', monospace; font-size: 9px; }.run-footnote span { color: var(--orange); }
.result-panel { margin-top: 15px; padding: 27px; border-color: #b9d7c4; background: #f0f7f2; transition: opacity .3s ease, transform .3s ease; }.result-panel.is-hidden { display: none; }.result-head { display: flex; justify-content: space-between; align-items: start; gap: 20px; }.result-head h3 { margin: 11px 0 0; font-size: 22px; letter-spacing: -.05em; }.decision-pill { padding: 8px 12px; color: var(--green); border: 1px solid #b9d7c4; border-radius: 100px; background: var(--mint); font-size: 11px; font-weight: 800; }.decision-pill.is-no { color: var(--orange-deep); border-color: #e6b99f; background: #fbe4d7; }.decision-pill.is-human { color: #886a21; border-color: #ded0a7; background: #f8f0cc; }.result-layout { display: grid; grid-template-columns: 1fr 1.15fr; gap: 36px; padding: 26px 0; }.result-kicker { color: var(--muted); font-family: 'DM Mono', monospace; font-size: 10px; letter-spacing: .08em; }.result-reason p { margin: 10px 0 16px; font-size: 14px; line-height: 1.7; }.human-note { padding: 11px 12px; color: #806924; border-left: 2px solid #d1b969; background: rgba(248,240,204,.66); font-size: 11px; line-height: 1.6; }.human-note:empty { display: none; }.fact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }.fact { min-height: 71px; padding: 12px; border: 1px solid rgba(177, 203, 185, .7); border-radius: 10px; background: rgba(255,255,252,.55); }.fact b, .fact span { display: block; }.fact b { margin: 7px 0 3px; font-family: 'DM Mono', monospace; font-size: 15px; }.fact span { color: var(--muted); font-size: 10px; }.result-bottom { display: flex; align-items: center; gap: 9px; padding-top: 17px; border-top: 1px solid #cbe0d0; color: var(--muted); font-family: 'DM Mono', monospace; font-size: 10px; }.result-bottom strong { display: inline-flex; align-items: center; gap: 8px; color: var(--green); font-weight: 500; }.reset-link { margin-left: auto; padding: 0; border: 0; background: transparent; color: var(--orange-deep); cursor: pointer; font-family: inherit; font-size: 10px; }
.logic-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }.logic-card { min-height: 263px; position: relative; display: flex; flex-direction: column; padding: 25px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,252,.42); }.logic-card.accent-card { background: var(--orange); color: #fff; border-color: var(--orange); }.logic-num { color: var(--orange); font-family: 'DM Mono', monospace; font-size: 11px; }.accent-card .logic-num { color: #ffd1bc; }.logic-card h3 { margin: 46px 0 13px; font-size: 18px; letter-spacing: -.04em; }.logic-card p { color: var(--muted); font-size: 12px; line-height: 1.75; }.accent-card p { color: rgba(255,255,255,.78); }.logic-formula { margin-top: auto; padding-top: 14px; border-top: 1px solid var(--line); color: var(--green); font-family: 'DM Mono', monospace; font-size: 10px; line-height: 1.5; }.accent-card .logic-formula { color: #fff; border-color: rgba(255,255,255,.35); }
.boundary { padding-bottom: 112px; }.boundary-card { display: grid; grid-template-columns: .95fr 1.05fr; gap: 60px; padding: 56px; border-radius: 30px; background: var(--ink); color: #fff; }.boundary-copy h2 { margin-bottom: 22px; font-size: clamp(36px, 4.5vw, 56px); }.boundary-copy p:not(.eyebrow) { max-width: 400px; color: #a9afa5; font-size: 13px; line-height: 1.8; }.boundary-copy .eyebrow { color: #a9afa5; }.boundary-copy .eyebrow span { color: #ff9a6f; }.boundary-copy .eyebrow b { border-color: #444941; }.boundary-list { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; align-content: center; }.boundary-row { display: flex; gap: 13px; padding: 17px; border: 1px solid #3d423b; border-radius: 13px; }.boundary-icon { width: 22px; height: 22px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 50%; font-weight: 800; }.boundary-icon.yes { color: #b9e7cd; background: #315d47; }.boundary-icon.no { color: #ffb399; background: #633e32; }.boundary-row b, .boundary-row small { display: block; }.boundary-row b { margin-bottom: 5px; font-size: 12px; }.boundary-row small { color: #9ca399; font-size: 10px; line-height: 1.55; }.site-footer { display: flex; justify-content: space-between; padding: 20px 0 35px; border-top: 1px solid var(--line); color: var(--muted); font-family: 'DM Mono', monospace; font-size: 9px; letter-spacing: .05em; }
@media (max-width: 900px) { .hero { grid-template-columns: 1fr; padding-top: 62px; }.hero-orbit { height: 290px; max-width: 500px; margin: 0 auto; }.orbit-one { width: 270px; height: 180px; }.orbit-two { width: 210px; height: 285px; }.signal-strip { grid-template-columns: auto 1fr auto 1fr auto; }.demo-note { grid-column: 1 / -1; padding-top: 10px; }.demo-grid, .boundary-card { grid-template-columns: 1fr; }.logic-grid { grid-template-columns: repeat(2, 1fr); }.boundary-card { gap: 30px; } }
@media (max-width: 620px) { .shell { width: min(100% - 34px, 1180px); }.site-header { height: 72px; }.nav-links { display: none; }.live-chip { font-size: 9px; }.hero { min-height: 0; padding: 54px 0 40px; }.hero h1 { font-size: 46px; }.hero-lede { font-size: 14px; }.hero-actions { align-items: start; flex-direction: column; gap: 18px; }.hero-orbit { height: 240px; transform: scale(.86); }.tag-one { right: 0; }.tag-two { left: 0; }.tag-three { right: 5px; }.signal-strip { display: flex; flex-wrap: wrap; gap: 13px; }.signal-line { flex: 1; min-width: 22px; }.signal-item small { font-size: 9px; }.section { padding-top: 92px; }.section-heading { display: block; margin-bottom: 32px; }.section-intro { margin-top: 22px; }.scenario-bar { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 5px; }.scenario-tab { white-space: nowrap; }.source-panel, .run-panel, .result-panel { padding: 21px; }.source-panel h3 { font-size: 21px; }.metric-grid { gap: 4px; }.metric b { font-size: 12px; }.trace-item { grid-template-columns: 24px 17px 1fr auto; gap: 7px; }.trace-copy small { font-size: 9px; }.trace-status { font-size: 8px; }.result-layout { display: block; }.result-facts { margin-top: 23px; }.fact-grid { grid-template-columns: repeat(2, 1fr); }.logic-grid { grid-template-columns: 1fr; }.boundary-card { padding: 30px 22px; border-radius: 22px; }.boundary-list { grid-template-columns: 1fr; }.site-footer { display: block; line-height: 2; }.site-footer span { display: block; } }