:root {
  color-scheme: light;
  --ink: #19362e;
  --muted: #617269;
  --paper: #f7f7f2;
  --cream: #eeefe8;
  --line: #d6ded3;
  --green: #2f6b50;
  --warm: #b3553d;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 36px; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 15px/1.8 var(--font); -webkit-font-smoothing: antialiased; }
h1, h2, h3, p, ol, dl { margin: 0; }
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 5px; }
a:focus-visible { outline: 3px solid #e3a768; outline-offset: 5px; border-radius: 2px; }
.skip-link { position: absolute; top: -80px; left: 15px; z-index: 100; padding: 8px 13px; background: #fff; color: var(--ink); }
.skip-link:focus { top: 10px; }
.shell { width: min(1200px, calc(100% - 68px)); margin: 0 auto; }
.site-header { background: #f8f8f4; border-bottom: 1px solid #dce3da; }
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.site-brand { display: inline-flex; align-items: center; gap: 6px; color: #1f4839; font-size: 22px; font-weight: 700; letter-spacing: -.055em; white-space: nowrap; }
.site-brand>span:not(.brand-symbol) { color: #b4815e; padding-inline: 3px; font-weight: 400; }
.brand-symbol { display: inline-flex; align-items: flex-end; gap: 3px; width: 23px; height: 26px; margin-right: 5px; }
.brand-symbol i { display: block; width: 7px; height: 18px; border-radius: 6px 6px 1px 1px; background: #91ad82; transform: skew(-17deg); }
.brand-symbol i:last-child { height: 26px; background: #365d46; }
.header-inner nav { display: flex; align-items: center; gap: 32px; flex-wrap: wrap; font-size: 12px; font-weight: 600; color: #4c6257; }
.header-inner nav a:last-child { color: #a15c44; }
.hero { background: #173a31; color: #f5f7ec; overflow: hidden; position: relative; }
.hero:before { content: ""; position: absolute; inset: 0; pointer-events: none; background: radial-gradient(ellipse 570px 380px at 72% 20%, #3f6d5270, transparent 72%), linear-gradient(145deg, #173a31, #102b27); }
.hero:after { content: ""; position: absolute; width: 580px; height: 580px; border: 1px solid #9dc1a321; border-radius: 50%; right: -120px; top: -280px; box-shadow: 0 0 0 105px #9dc1a308, 0 0 0 210px #9dc1a304; pointer-events: none; }
.hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(310px, .78fr); gap: 80px; align-items: end; padding: 86px 0 88px; }
.eyebrow, .section-kicker { display: inline-block; color: #558167; font-size: 10px; line-height: 1.4; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow-light { color: #b8d3af; display: flex; gap: 11px; align-items: center; }
.eyebrow-line { width: 24px; height: 1px; background: #b8d3af; }
.hero h1 { margin-top: 28px; font-size: clamp(39px, 4.55vw, 66px); line-height: 1.38; letter-spacing: -.058em; font-weight: 650; }
.hero h1 em { font-style: normal; color: #e8b497; }
.hero h1 span { color: #c9dfb4; }
.hero-copy>p { max-width: 690px; margin-top: 27px; color: #c8d8ca; font-size: 15px; line-height: 2.05; }
.hero-actions { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; margin-top: 34px; }
.primary-link { display: inline-flex; justify-content: space-between; align-items: center; min-width: 244px; padding: 13px 18px; border-radius: 4px; background: #d5e5b5; color: #1b4032; font-size: 12px; font-weight: 750; }
.primary-link:hover { background: #e5efcd; text-decoration: none; }
.secondary-link { color: #d8e5d1; font-size: 12px; }
.hero-status { border: 1px solid #8caa9070; border-radius: 14px; background: #f8faf112; backdrop-filter: blur(8px); padding: 29px 30px 25px; box-shadow: 0 20px 60px #061e1b20; }
.hero-status-top { display: flex; align-items: center; gap: 9px; color: #c9d9bc; font-size: 11px; font-weight: 700; letter-spacing: .08em; }
.status-dot { width: 8px; height: 8px; background: #ebbc8b; border-radius: 50%; box-shadow: 0 0 0 4px #ebbc8b26; }
.hero-status>strong { display: block; margin-top: 20px; font-size: 21px; line-height: 1.65; letter-spacing: -.025em; font-weight: 600; }
.hero-status>p { margin-top: 16px; color: #cadacd; font-size: 12px; line-height: 1.9; }
.status-divider { border-top: 1px solid #b7cfb050; margin: 25px 0 18px; }
.hero-status dl { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.hero-status dt { color: #acc3ae; font-size: 10px; }
.hero-status dd { margin: 4px 0 0; color: #f0f4e8; font-size: 22px; line-height: 1.3; font-weight: 600; }
.context-band { background: #e8e9df; border-bottom: 1px solid #d7ddd1; }
.context-inner { display: grid; grid-template-columns: 1fr 1.35fr; gap: 100px; padding: 50px 0; }
.context-inner h2 { font-size: clamp(23px, 2.55vw, 34px); line-height: 1.48; letter-spacing: -.04em; margin-top: 13px; }
.context-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 20px 35px; font-size: 13px; color: #536258; }
.context-facts p { border-left: 2px solid #aabb9d; padding-left: 18px; }
.context-facts strong { color: var(--ink); }
.context-facts a { grid-column: 1/-1; color: #2f6b50; font-weight: 650; font-size: 12px; }
.section { padding-top: 96px; padding-bottom: 104px; scroll-margin-top: 20px; }
.section-heading { display: grid; grid-template-columns: .8fr 1.55fr; column-gap: 48px; align-items: end; margin-bottom: 39px; }
.section-heading .section-kicker { grid-column: 1/-1; margin-bottom: 14px; }
.section-heading h2 { font-size: clamp(30px, 3.35vw, 45px); line-height: 1.36; letter-spacing: -.052em; }
.section-heading p { font-size: 14px; line-height: 1.92; max-width: 665px; color: var(--muted); }
.shared-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.shared-grid article { min-height: 230px; padding: 24px 21px 25px; background: #fff; border: 1px solid var(--line); border-radius: 7px; }
.shared-index { color: #729075; font-size: 10px; font-weight: 750; letter-spacing: .12em; }
.shared-grid h3 { margin-top: 15px; font-size: 18px; line-height: 1.45; letter-spacing: -.025em; }
.shared-grid p { margin-top: 10px; color: var(--muted); font-size: 12px; line-height: 1.9; }
.shared-note { display: grid; grid-template-columns: .7fr 2fr; gap: 25px; align-items: center; margin-top: 17px; padding: 19px 24px; border-left: 4px solid #608d6d; background: #e9f0e8; border-radius: 0 7px 7px 0; }
.shared-note strong { color: #275b42; font-size: 14px; }
.shared-note p { color: #4f6a5a; font-size: 12px; }
.section-cream { background: var(--cream); border-block: 1px solid #e0e4d9; }
.arm-at-a-glance { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin-bottom: 18px; overflow: hidden; border: 1px solid #ced9cb; border-radius: 8px; background: #f8faf5; }
.arm-at-a-glance>div { min-width: 0; padding: 17px 19px 18px; border-top: 3px solid #89988a; }
.arm-at-a-glance>div+div { border-left: 1px solid #d9e1d6; }
.arm-at-a-glance>div:nth-child(2) { border-top-color: #ac8e61; }
.arm-at-a-glance>div:nth-child(3) { border-top-color: #427b68; }
.arm-at-a-glance>div:nth-child(4) { border-top-color: #c06f4e; background: #fff8f0; }
.arm-at-a-glance span { display: block; color: #648274; font-size: 10px; font-weight: 750; letter-spacing: .04em; }
.arm-at-a-glance strong { display: block; margin-top: 6px; font-size: 14px; line-height: 1.55; letter-spacing: -.02em; }
.arm-at-a-glance small { display: block; margin-top: 4px; color: #748377; font-size: 11px; line-height: 1.55; }
.arm-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 17px; }
.arm-card { min-height: 360px; display: flex; flex-direction: column; padding: 29px 32px 27px; background: #fff; border: 1px solid #d7ded5; border-top: 4px solid #89988a; border-radius: 8px; box-shadow: 0 9px 28px #223a2c08; }
.arm-regular { border-top-color: #ac8e61; }
.arm-wide-deep { border-top-color: #427b68; }
.arm-recovery { border-top-color: #c06f4e; background: #fffdf9; }
.arm-top { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.arm-number { color: #70857a; font: 700 11px/1.1 var(--font); letter-spacing: .1em; }
.arm-kind { padding: 5px 9px; border-radius: 100px; background: #eef1ea; color: #6b786d; font-size: 10px; white-space: nowrap; }
.arm-recovery .arm-kind { background: #f7eadd; color: #a6553e; }
.arm-card h3 { margin-top: 14px; font-size: 27px; line-height: 1.35; letter-spacing: -.045em; }
.arm-lead { margin-top: 7px; color: #40554a; font-size: 14px; font-weight: 600; line-height: 1.75; }
.arm-detail { margin-top: 23px; }
.arm-detail span, .arm-question span { display: block; color: #809188; font-size: 10px; font-weight: 700; letter-spacing: .06em; }
.arm-detail p { margin-top: 5px; color: var(--muted); font-size: 12px; line-height: 1.9; }
.arm-question { margin-top: auto; border-top: 1px solid #e2e7dd; padding-top: 16px; }
.arm-question strong { display: block; margin-top: 4px; font-size: 14px; line-height: 1.7; font-weight: 650; color: #254e3a; }
.arm-footnote { margin-top: 23px; padding-left: 16px; border-left: 2px solid #a5b7a7; color: #66766b; font-size: 12px; line-height: 1.9; }
.case-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.case-card { border-radius: 8px; padding: 31px 33px 27px; border: 1px solid #e4d9d0; background: #f8f1ec; }
.case-new { background: #edf3e9; border-color: #d8e4d3; }
.case-label { display: flex; align-items: center; gap: 9px; color: #a2523d; font-size: 11px; font-weight: 800; letter-spacing: .05em; }
.case-new .case-label { color: #3d7958; }
.case-dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.case-card h3 { margin: 12px 0 20px; font-size: 21px; line-height: 1.55; letter-spacing: -.035em; }
.case-card ol { padding: 0; list-style: none; }
.case-card li { display: grid; grid-template-columns: 95px minmax(0, 1fr) 100px; gap: 13px; align-items: center; border-top: 1px solid #e5d9d0; padding: 12px 0; font-size: 12px; }
.case-new li { border-color: #d6e2d2; }
.case-card li span { color: #857b71; font-size: 11px; }
.case-card li strong { color: #3a4d40; font-weight: 600; line-height: 1.55; }
.case-card li small { color: #737f72; text-align: right; font-size: 10px; }
.case-card li.rejected strong, .case-card li.rejected small { color: #a04e3b; }
.case-card li.corrected strong, .case-card li.corrected small { color: #2d704e; }
.case-result { margin-top: 20px; padding-top: 16px; border-top: 1px solid #decfc3; color: #9f4c3a; font-size: 13px; font-weight: 700; }
.case-new .case-result { border-color: #cbdcca; color: #2a6f4b; }
.case-clarifier { display: grid; grid-template-columns: .58fr 1.5fr; gap: 35px; margin-top: 17px; padding: 22px 25px; border: 1px solid var(--line); background: #fff; border-radius: 7px; }
.case-clarifier strong { font-size: 14px; }
.case-clarifier p { color: var(--muted); font-size: 12px; }
.section-dark { background: #193a31; color: #f4f5eb; }
.section-dark .section-kicker { color: #a9cf9d; }
.section-dark .section-heading p { color: #b7cdbd; }
.teaching-routes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-bottom: 43px; }
.teaching-route { min-height: 220px; padding: 24px 26px 23px; border: 1px solid #779b7c75; border-top: 4px solid #b7d69c; border-radius: 8px; background: #284d3e; }
.route-prevention { border-color: #b99c7a65; border-top-color: #d7aa7b; background: #414a3b; }
.route-header span { display: block; color: #bad8ac; font-size: 10px; font-weight: 800; letter-spacing: .1em; }
.route-prevention .route-header span { color: #eac39d; }
.route-header strong { display: block; margin-top: 7px; font-size: 22px; line-height: 1.4; letter-spacing: -.03em; }
.teaching-route p { margin-top: 10px; color: #d0decf; font-size: 12px; line-height: 1.85; }
.route-prevention p { color: #e2decf; }
.teaching-route small { display: block; margin-top: 15px; padding-top: 12px; border-top: 1px solid #8db28b55; color: #c4dcb5; font-size: 11px; line-height: 1.65; }
.route-prevention small { border-top-color: #cdb29555; color: #e8c8a5; }
.flow-intro { display: grid; grid-template-columns: .42fr 1fr 1.28fr; gap: 25px; align-items: end; margin-bottom: 21px; }
.flow-intro span { color: #a9cf9d; font-size: 10px; font-weight: 800; letter-spacing: .12em; }
.flow-intro h3 { font-size: 19px; line-height: 1.5; letter-spacing: -.025em; }
.flow-intro p { color: #b7cdbd; font-size: 11px; line-height: 1.8; }
.teaching-flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; padding: 0; list-style: none; counter-reset: none; }
.teaching-flow li { position: relative; padding: 25px 21px 29px; min-height: 235px; background: #285041; border: 1px solid #64887375; border-radius: 7px; }
.teaching-flow li+li:before { content: "→"; position: absolute; left: -17px; top: 30px; z-index: 2; width: 20px; height: 20px; display: grid; place-items: center; background: #193a31; color: #dce8ca; font-size: 18px; line-height: 1; }
.teaching-flow li>span { display: grid; place-items: center; width: 29px; height: 29px; border: 1px solid #a9c9a5; border-radius: 50%; color: #d6e7c7; font-size: 11px; font-weight: 700; }
.teaching-flow h3 { margin-top: 19px; font-size: 18px; }
.teaching-flow p { margin-top: 8px; color: #bed2c0; font-size: 12px; line-height: 1.9; }
.teaching-bottom { display: flex; justify-content: space-between; align-items: center; gap: 35px; padding: 22px 0 0; color: #c7d7c9; font-size: 12px; }
.teaching-bottom p { max-width: 790px; }
.teaching-bottom a { white-space: nowrap; color: #d9e8bd; font-weight: 700; }
.evidence-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 17px; }
.evidence-grid article { min-height: 250px; padding: 26px 26px 25px; border: 1px solid var(--line); background: #fff; border-radius: 7px; }
.evidence-done { border-top: 4px solid #5f9a6f !important; }
.evidence-pending { border-top: 4px solid #ca965d !important; }
.evidence-not-yet { border-top: 4px solid #a7afa6 !important; }
.evidence-mark { display: grid; place-items: center; width: 31px; height: 31px; border-radius: 50%; background: #e5f0e4; color: #378056; font-size: 15px; font-weight: 800; }
.evidence-pending .evidence-mark { background: #f6ebdc; color: #b57a41; }
.evidence-not-yet .evidence-mark { background: #edf0ec; color: #78827a; }
.evidence-grid h3 { margin-top: 20px; font-size: 19px; }
.evidence-grid p { margin-top: 8px; color: var(--muted); font-size: 12px; line-height: 1.9; }
.evidence-grid small { display: block; margin-top: 12px; color: #a17749; font-size: 11px; }
.decision-line { display: grid; grid-template-columns: .45fr 1.5fr; gap: 28px; margin-top: 24px; padding: 22px 27px; background: #eaf0e6; border-left: 4px solid #61906c; border-radius: 0 6px 6px 0; }
.decision-line span { color: #5b7b63; font-size: 11px; font-weight: 800; letter-spacing: .05em; }
.decision-line strong { font-size: 14px; line-height: 1.8; font-weight: 650; }
.section-links { padding-block: 63px; background: #ebece4; border-top: 1px solid #dce2d6; }
.link-inner { display: grid; grid-template-columns: 1fr 1.2fr; gap: 100px; align-items: center; }
.link-inner h2 { margin-top: 10px; font-size: 30px; line-height: 1.45; letter-spacing: -.04em; }
.link-inner p { margin-top: 12px; max-width: 430px; color: var(--muted); font-size: 12px; }
.link-list { border-top: 1px solid #d1d9cd; }
.link-list a { display: flex; align-items: center; justify-content: space-between; gap: 20px; border-bottom: 1px solid #d1d9cd; padding: 15px 0; }
.link-list span { color: #778b79; font-size: 11px; white-space: nowrap; }
.link-list strong { color: #285a41; font-size: 12px; font-weight: 650; text-align: right; }
.footer { display: flex; justify-content: space-between; align-items: center; min-height: 86px; gap: 20px; color: #7a897b; font-size: 11px; }
.footer a { color: #416c51; }
@media (max-width: 1050px) {
  .hero-inner { gap: 35px; }
  .context-inner, .link-inner { gap: 42px; }
  .shared-grid { grid-template-columns: repeat(2, 1fr); }
  .shared-grid article { min-height: 0; }
  .teaching-flow { grid-template-columns: repeat(2, 1fr); }
  .teaching-flow li { min-height: 205px; }
  .teaching-flow li:nth-child(3):before { display: none; }
}
@media (max-width: 760px) {
  .shell { width: calc(100% - 38px); }
  .header-inner { min-height: 77px; flex-wrap: wrap; padding: 13px 0 9px; gap: 8px; }
  .header-inner nav { width: 100%; justify-content: space-between; gap: 10px; font-size: 10px; }
  .hero-inner { grid-template-columns: 1fr; padding: 58px 0 60px; }
  .hero h1 { font-size: clamp(36px, 7.6vw, 53px); }
  .hero-status { max-width: 560px; }
  .context-inner { grid-template-columns: 1fr; gap: 20px; padding: 36px 0; }
  .context-facts { gap: 17px; }
  .section { padding-top: 66px; padding-bottom: 73px; }
  .section-heading { display: block; margin-bottom: 27px; }
  .section-heading h2 { margin-top: 7px; font-size: 35px; }
  .section-heading p { margin-top: 13px; font-size: 13px; }
  .arm-at-a-glance { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .arm-at-a-glance>div:nth-child(3) { border-left: 0; }
  .arm-at-a-glance>div:nth-child(n+3) { border-top: 1px solid #d9e1d6; }
  .flow-intro { grid-template-columns: 1fr; gap: 5px; }
  .arm-grid, .case-grid, .link-inner { grid-template-columns: 1fr; }
  .arm-card { min-height: 320px; }
  .case-clarifier, .decision-line, .shared-note { grid-template-columns: 1fr; gap: 7px; }
  .evidence-grid { grid-template-columns: 1fr; }
  .evidence-grid article { min-height: 0; }
  .link-inner { gap: 25px; }
}
@media (max-width: 500px) {
  .site-brand { font-size: 20px; }
  .header-inner nav { gap: 8px; }
  .header-inner nav a { white-space: nowrap; }
  .hero-inner { padding: 45px 0 49px; }
  .hero h1 { font-size: 35px; line-height: 1.43; }
  .hero-copy>p { font-size: 13px; margin-top: 20px; }
  .hero-actions { gap: 14px; margin-top: 25px; }
  .hero-status { padding: 23px 21px; }
  .hero-status>strong { font-size: 18px; }
  .context-facts, .shared-grid, .teaching-routes, .teaching-flow { grid-template-columns: 1fr; }
  .shared-grid article { padding: 20px; }
  .arm-at-a-glance { grid-template-columns: 1fr; }
  .arm-at-a-glance>div { border-left: 0 !important; }
  .arm-at-a-glance>div+div { border-top: 1px solid #d9e1d6; }
  .arm-card, .case-card { padding: 23px 21px; }
  .arm-card h3 { font-size: 24px; }
  .case-card li { grid-template-columns: 79px minmax(0, 1fr); gap: 7px; }
  .case-card li small { grid-column: 2; text-align: left; margin-top: -6px; }
  .teaching-flow li { min-height: 0; }
  .teaching-flow li:before { display: none !important; }
  .teaching-bottom { display: block; }
  .teaching-bottom a { display: inline-block; margin-top: 15px; }
  .link-list a { align-items: flex-start; flex-direction: column; gap: 2px; }
  .link-list strong { text-align: left; }
  .footer { align-items: flex-start; flex-direction: column; justify-content: center; gap: 0; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }