:root {
  --ink: #06142d;
  --navy: #08275e;
  --blue: #0b61c9;
  --paper: #f5f7fa;
  --white: #fff;
  --line: #b9c8dc;
  --muted: #5b6b80;
  --orange: #ff8a1e;
  --max: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif; line-height: 1.72; -webkit-font-smoothing: antialiased; }
body::before { position: fixed; inset: 0; z-index: -1; background-image: radial-gradient(circle, rgba(8,39,94,.08) 1px, transparent 1px); background-size: 22px 22px; content: ""; pointer-events: none; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 3px; }

.jkr-masthead { position: relative; z-index: 20; display: grid; grid-template-columns: 240px 1fr auto; align-items: center; width: min(calc(100% - 40px), var(--max)); min-height: 82px; margin: 0 auto; border-bottom: 1px solid var(--line); }
.jkr-brandmark { display: flex; align-items: center; gap: 11px; font-weight: 800; }
.jkr-brandmark img { width: 46px; height: 46px; object-fit: contain; }
.jkr-brandmark span { font-size: 18px; letter-spacing: .04em; }
.jkr-site-map { display: flex; justify-content: center; gap: 28px; font-size: 14px; font-weight: 650; }
.jkr-site-map a { position: relative; padding: 27px 0 25px; color: #33425a; }
.jkr-site-map a::after { position: absolute; right: 0; bottom: 18px; left: 0; height: 2px; background: var(--blue); content: ""; transform: scaleX(0); transition: transform .2s ease; }
.jkr-site-map a:hover::after, .jkr-site-map a[aria-current="page"]::after { transform: scaleX(1); }
.jkr-head-action { display: inline-flex; align-items: center; gap: 8px; padding: 11px 16px; color: var(--white); background: var(--ink); border: 1px solid var(--ink); font-size: 14px; font-weight: 700; transition: background .2s ease, color .2s ease; }
.jkr-head-action:hover { color: var(--ink); background: transparent; }
.jkr-menu-switch { display: none; border: 0; background: transparent; color: var(--ink); }

.jkr-beacon { position: relative; display: grid; grid-template-columns: 132px minmax(430px, 1fr) minmax(390px, .82fr); gap: 34px; width: min(calc(100% - 40px), var(--max)); margin: 0 auto; padding: 62px 0 56px; overflow: hidden; }
.jkr-index-rail { padding-top: 8px; border-right: 1px solid var(--line); }
.jkr-index-rail > span { color: var(--blue); font: 700 11px/1.2 ui-monospace, Consolas, monospace; letter-spacing: .12em; }
.jkr-index-rail ul { margin: 46px 0 0; padding: 0; list-style: none; writing-mode: vertical-rl; text-orientation: upright; }
.jkr-index-rail li { display: inline; margin-left: 15px; color: #496079; font-size: 12px; letter-spacing: .16em; }
.jkr-manifest { align-self: center; max-width: 650px; }
.jkr-kicker { display: inline-flex; align-items: center; gap: 8px; margin: 0 0 18px; color: var(--blue); font-size: 14px; font-weight: 800; }
.jkr-kicker i { font-size: 20px; }
.jkr-manifest h1 { margin: 0; font-size: clamp(48px, 5.2vw, 64px); line-height: 1.02; letter-spacing: .03em; }
.jkr-proposition { max-width: 660px; margin: 18px 0 0; font-size: clamp(22px, 2.2vw, 30px); font-weight: 750; line-height: 1.45; }
.jkr-hero-note { max-width: 630px; margin: 20px 0 0; color: var(--muted); font-size: 15px; }
.jkr-hero-actions { display: flex; align-items: center; gap: 24px; margin-top: 30px; }
.jkr-solid-link { display: inline-flex; align-items: center; gap: 9px; min-height: 48px; padding: 0 22px; color: var(--white); background: var(--blue); border: 1px solid var(--blue); font-weight: 750; transition: transform .2s ease, box-shadow .2s ease; }
.jkr-solid-link:hover { transform: translateY(-2px); box-shadow: 6px 6px 0 #dceeff; }
.jkr-text-link { font-size: 14px; font-weight: 700; border-bottom: 1px solid currentColor; }
.jkr-quick-proof { display: grid; grid-template-columns: repeat(3, 1fr); max-width: 560px; margin: 36px 0 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.jkr-quick-proof div { display: grid; grid-template-columns: 32px 1fr; gap: 8px; padding: 14px 10px; }
.jkr-quick-proof div + div { border-left: 1px solid var(--line); }
.jkr-quick-proof dt { color: var(--blue); font: 800 12px/1.4 ui-monospace, Consolas, monospace; }
.jkr-quick-proof dd { margin: 0; font-size: 13px; font-weight: 700; line-height: 1.45; }

.jkr-evidence-poster { position: relative; align-self: center; min-height: 520px; margin: 0; color: var(--white); background: var(--navy); border: 1px solid #061d46; overflow: hidden; }
.jkr-evidence-poster::before { position: absolute; inset: 0; background: linear-gradient(90deg, transparent 49.5%, rgba(255,255,255,.07) 50%, transparent 50.5%); background-size: 34px 100%; content: ""; }
.jkr-poster-number { position: absolute; top: -54px; right: -4px; color: rgba(255,255,255,.06); font: 900 240px/.9 Arial, sans-serif; }
.jkr-shot-pair { position: absolute; inset: 34px 26px 58px; }
.jkr-shot-pair img { position: absolute; width: 238px; height: auto; border: 5px solid var(--white); box-shadow: 0 16px 35px rgba(0,0,0,.28); }
.jkr-shot-front { z-index: 2; right: 8px; bottom: -18px; transform: rotate(2.3deg); }
.jkr-shot-back { top: 12px; left: -2px; transform: rotate(-4deg); opacity: .92; }
.jkr-evidence-poster figcaption { position: absolute; right: 18px; bottom: 14px; left: 18px; z-index: 4; display: flex; justify-content: space-between; gap: 12px; font-size: 11px; }
.jkr-evidence-poster figcaption span { color: #83bdff; font-family: ui-monospace, Consolas, monospace; letter-spacing: .1em; }

.jkr-signal-strip { display: flex; align-items: center; justify-content: center; gap: 24px; padding: 12px 20px; color: var(--white); background: var(--blue); font: 700 11px/1.2 ui-monospace, Consolas, monospace; letter-spacing: .12em; overflow: hidden; }
.jkr-signal-strip i { width: 5px; height: 5px; background: var(--orange); border-radius: 50%; }
.jkr-chapter { display: inline-block; margin-bottom: 12px; color: var(--blue); font: 800 11px/1.2 ui-monospace, Consolas, monospace; letter-spacing: .14em; }

.jkr-discovery { display: grid; grid-template-columns: 1.05fr 1.35fr .75fr; gap: 44px; width: min(calc(100% - 40px), 1160px); margin: 0 auto; padding: 76px 0 68px; }
.jkr-discovery h2, .jkr-gallery h2, .jkr-trust-route h2, .jkr-toolbelt h2, .jkr-community h2, .jkr-questions h2 { margin: 0; font-size: clamp(28px, 3vw, 38px); line-height: 1.28; }
.jkr-discovery-lead > p { margin: 22px 0 0; color: var(--muted); font-size: 15px; }
.jkr-find-methods { margin: 0; border-top: 2px solid var(--ink); }
.jkr-find-methods > div { padding: 20px 0 22px; border-bottom: 1px solid var(--line); }
.jkr-find-methods dt { font-size: 17px; font-weight: 800; }
.jkr-find-methods dt span { display: inline-block; width: 34px; color: var(--blue); font: 700 11px ui-monospace, Consolas, monospace; }
.jkr-find-methods dd { margin: 8px 0 0 34px; color: var(--muted); font-size: 14px; }
.jkr-curation-note { align-self: end; padding: 24px 20px; color: var(--white); background: var(--ink); border-top: 5px solid var(--orange); }
.jkr-curation-note i { color: #77b5ff; font-size: 26px; }
.jkr-curation-note strong { display: block; margin-top: 28px; font-size: 18px; line-height: 1.5; }
.jkr-curation-note p { margin: 12px 0 0; color: #b9cbe3; font-size: 13px; }

.jkr-gallery { padding: 68px max(20px, calc((100% - 1240px) / 2)); color: var(--white); background: var(--ink); }
.jkr-gallery-caption { display: grid; grid-template-columns: 140px minmax(300px, .8fr) 1fr; gap: 28px; align-items: end; max-width: 1160px; margin: 0 auto 34px; }
.jkr-gallery-caption .jkr-chapter { align-self: start; color: #78b7ff; }
.jkr-gallery-caption p { margin: 0; color: #acbdd5; font-size: 14px; }
.jkr-screen-contact { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; max-width: 1160px; margin: 0 auto; padding: 0; list-style: none; }
.jkr-screen-contact li { position: relative; padding: 12px; background: #0e2344; border: 1px solid #284261; }
.jkr-screen-contact li:nth-child(even) { transform: translateY(16px); }
.jkr-screen-contact figure { margin: 0; }
.jkr-screen-contact img { width: 100%; height: auto; background: #fff; }
.jkr-screen-contact figcaption { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 13px 2px 2px; font-size: 13px; }
.jkr-screen-contact figcaption b { color: #78b7ff; font: 800 11px ui-monospace, Consolas, monospace; }
.jkr-swipe-hint { display: none; margin: 24px auto 0; color: #9eb1ca; font-size: 12px; }

.jkr-trust-route { width: min(calc(100% - 40px), 1160px); margin: 0 auto; padding: 72px 0 62px; }
.jkr-route-intro { display: grid; grid-template-columns: 150px 1fr 1fr; gap: 30px; align-items: start; }
.jkr-route-intro p { margin: 4px 0 0; color: var(--muted); font-size: 14px; }
.jkr-route-line { display: grid; grid-template-columns: repeat(4, 1fr); margin: 38px 0 0; padding: 0; border-top: 2px solid var(--blue); list-style: none; }
.jkr-route-line li { position: relative; padding: 26px 22px 0 0; }
.jkr-route-line li::before { position: absolute; top: -7px; left: 0; width: 12px; height: 12px; background: var(--paper); border: 3px solid var(--blue); border-radius: 50%; content: ""; }
.jkr-route-line span { color: var(--blue); font: 800 11px ui-monospace, Consolas, monospace; }
.jkr-route-line i { display: block; margin: 18px 0 12px; color: var(--blue); font-size: 30px; }
.jkr-route-line strong { font-size: 17px; }
.jkr-route-line p { margin: 8px 0 0; color: var(--muted); font-size: 13px; }

.jkr-toolbelt { display: grid; grid-template-columns: .72fr 1.6fr; color: var(--white); background: var(--blue); }
.jkr-toolbelt-titlebox { display: flex; flex-direction: column; justify-content: center; padding: 60px max(32px, calc((100vw - 1160px) / 2)); padding-right: 48px; background: #084da4; }
.jkr-toolbelt-titlebox .jkr-chapter { color: #b8dbff; }
.jkr-toolbelt-titlebox p { margin: 20px 0 0; color: #d7eaff; font-size: 14px; }
.jkr-toolbelt-list { display: grid; grid-template-columns: repeat(2, 1fr); }
.jkr-toolbelt-list article { position: relative; min-height: 230px; padding: 30px; border-left: 1px solid rgba(255,255,255,.2); border-bottom: 1px solid rgba(255,255,255,.2); }
.jkr-toolbelt-list article:nth-last-child(-n+2) { border-bottom: 0; }
.jkr-toolbelt-list i { margin-top: 24px; color: #bdddff; font-size: 30px; }
.jkr-tool-id { position: absolute; top: 18px; right: 20px; color: #a9d2ff; font: 700 10px ui-monospace, Consolas, monospace; }
.jkr-toolbelt-list h3 { margin: 6px 0 4px; font-size: 19px; }
.jkr-toolbelt-list p { max-width: 300px; margin: 0; color: #d8eaff; font-size: 13px; }

.jkr-community { display: grid; grid-template-columns: .75fr 1.35fr; gap: 56px; width: min(calc(100% - 40px), 1160px); margin: 0 auto; padding: 72px 0 64px; }
.jkr-community-copy { position: sticky; top: 24px; align-self: start; }
.jkr-community-copy p { margin: 18px 0 0; color: var(--muted); font-size: 14px; }
.jkr-voice-ledger { border-top: 2px solid var(--ink); }
.jkr-voice-ledger article { display: grid; grid-template-columns: 42px 1fr 120px; gap: 16px; align-items: center; padding: 18px 0; border-bottom: 1px solid var(--line); }
.jkr-avatar { display: grid; width: 36px; height: 36px; place-items: center; color: var(--white); background: var(--blue); font-size: 13px; font-weight: 800; }
.jkr-voice-ledger blockquote { margin: 0; font-size: 14px; }
.jkr-voice-ledger p { display: flex; flex-direction: column; align-items: flex-end; margin: 0; color: var(--muted); font-size: 12px; }
.jkr-score { color: var(--blue); font-family: ui-monospace, Consolas, monospace; font-weight: 800; }

.jkr-questions { display: grid; grid-template-columns: .72fr 1.4fr; gap: 72px; padding: 64px max(20px, calc((100% - 1160px) / 2)); background: #e7edf5; }
.jkr-question-heading p { margin: 18px 0 0; color: var(--muted); font-size: 14px; }
.jkr-question-stack { border-top: 2px solid var(--ink); }
.jkr-question-stack details { border-bottom: 1px solid #aebdd0; }
.jkr-question-stack summary { display: flex; justify-content: space-between; gap: 18px; padding: 20px 0; cursor: pointer; font-size: 16px; font-weight: 800; list-style: none; }
.jkr-question-stack summary::-webkit-details-marker { display: none; }
.jkr-question-stack summary i { flex: 0 0 auto; color: var(--blue); font-size: 20px; transition: transform .2s ease; }
.jkr-question-stack details[open] summary i { transform: rotate(45deg); }
.jkr-question-stack details p { margin: -3px 40px 20px 0; color: var(--muted); font-size: 14px; }

.jkr-final-call { position: relative; display: grid; grid-template-columns: 1fr 270px; gap: 64px; align-items: center; width: min(calc(100% - 40px), 1160px); margin: 70px auto; padding: 54px 58px; color: var(--white); background: var(--navy); overflow: hidden; }
.jkr-final-copy { position: relative; z-index: 2; }
.jkr-final-copy > span { color: #82bcff; font: 700 11px ui-monospace, Consolas, monospace; letter-spacing: .12em; }
.jkr-final-copy h2 { margin: 16px 0 0; font-size: clamp(30px, 3.4vw, 44px); line-height: 1.25; }
.jkr-final-copy p { max-width: 650px; margin: 18px 0 26px; color: #c7d5e8; font-size: 14px; }
.jkr-final-copy a { display: inline-flex; align-items: center; gap: 24px; min-height: 48px; padding: 0 20px; color: var(--ink); background: var(--white); font-weight: 800; }
.jkr-download-code { position: relative; z-index: 2; margin: 0; padding: 16px; color: var(--ink); background: var(--white); }
.jkr-download-code img { width: 100%; height: auto; image-rendering: crisp-edges; }
.jkr-download-code figcaption { display: flex; flex-direction: column; margin-top: 10px; }
.jkr-download-code figcaption strong { font-size: 14px; }
.jkr-download-code figcaption span { color: var(--muted); font-size: 11px; }
.jkr-orbit-word { position: absolute; right: 270px; bottom: -80px; color: rgba(255,255,255,.045); font: 900 250px/.8 Arial, sans-serif; }

.jkr-footer { display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: center; width: min(calc(100% - 40px), var(--max)); margin: 0 auto; padding: 30px 0 36px; border-top: 1px solid var(--line); }
.jkr-footer-identity { display: flex; align-items: center; gap: 12px; }
.jkr-footer-identity img { width: 50px; height: 50px; object-fit: contain; }
.jkr-footer-identity div { display: flex; flex-direction: column; }
.jkr-footer-identity strong { font-size: 15px; }
.jkr-footer-identity span { color: var(--muted); font-size: 11px; }
.jkr-footer-links { display: flex; gap: 22px; color: #42536b; font-size: 12px; }
.jkr-footer > p { grid-column: 1 / -1; margin: 0; color: #77869a; font-size: 11px; }
.jkr-backtop { position: fixed; right: 18px; bottom: 18px; z-index: 15; display: grid; width: 44px; height: 44px; place-items: center; color: var(--white); background: var(--ink); border: 0; opacity: 0; pointer-events: none; transform: translateY(8px); transition: opacity .2s ease, transform .2s ease; cursor: pointer; }
.jkr-backtop.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }

@media (max-width: 1080px) {
  .jkr-masthead { grid-template-columns: 220px 1fr auto; }
  .jkr-site-map { gap: 18px; }
  .jkr-beacon { grid-template-columns: 76px 1fr 360px; gap: 25px; }
  .jkr-evidence-poster { min-height: 480px; }
  .jkr-shot-pair img { width: 210px; }
  .jkr-discovery { grid-template-columns: 1fr 1.3fr; }
  .jkr-curation-note { grid-column: 1 / -1; display: grid; grid-template-columns: 40px 1fr 1.6fr; gap: 18px; align-items: center; }
  .jkr-curation-note strong, .jkr-curation-note p { margin: 0; }
}

@media (max-width: 820px) {
  .jkr-masthead { grid-template-columns: 1fr auto; min-height: 70px; }
  .jkr-head-action { display: none; }
  .jkr-menu-switch { display: inline-flex; align-items: center; gap: 7px; padding: 10px 0 10px 14px; cursor: pointer; }
  .jkr-site-map { position: absolute; top: 70px; right: 0; left: 0; display: none; flex-direction: column; gap: 0; padding: 10px 16px 16px; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 12px 20px rgba(5,20,45,.08); }
  .jkr-site-map.is-open { display: flex; }
  .jkr-site-map a { padding: 10px 0; }
  .jkr-site-map a::after { display: none; }
  .jkr-beacon { grid-template-columns: 50px 1fr; padding: 46px 0; }
  .jkr-index-rail { grid-row: 1 / span 2; }
  .jkr-evidence-poster { grid-column: 2; min-height: 470px; }
  .jkr-discovery { grid-template-columns: 1fr; gap: 28px; }
  .jkr-curation-note { grid-column: auto; }
  .jkr-gallery-caption { grid-template-columns: 1fr 1.7fr; }
  .jkr-gallery-caption .jkr-chapter { grid-column: 1 / -1; margin-bottom: -12px; }
  .jkr-screen-contact { overflow-x: auto; grid-template-columns: repeat(4, 250px); padding: 0 0 16px; scroll-snap-type: x mandatory; scrollbar-color: #456282 transparent; }
  .jkr-screen-contact li { scroll-snap-align: start; }
  .jkr-screen-contact li:nth-child(even) { transform: none; }
  .jkr-swipe-hint { display: block; }
  .jkr-route-intro { grid-template-columns: 1fr 1.5fr; }
  .jkr-route-intro .jkr-chapter { grid-column: 1 / -1; }
  .jkr-route-line { grid-template-columns: repeat(2, 1fr); gap: 28px 0; }
  .jkr-toolbelt { grid-template-columns: 1fr; }
  .jkr-toolbelt-titlebox { padding: 50px max(24px, calc((100vw - 720px) / 2)); }
  .jkr-toolbelt-list article { min-height: 200px; }
  .jkr-community { grid-template-columns: 1fr; gap: 30px; }
  .jkr-community-copy { position: static; }
  .jkr-questions { grid-template-columns: 1fr; gap: 30px; }
  .jkr-final-call { grid-template-columns: 1fr 210px; padding: 46px 38px; }
}

@media (max-width: 560px) {
  .jkr-masthead, .jkr-beacon, .jkr-discovery, .jkr-trust-route, .jkr-community, .jkr-final-call, .jkr-footer { width: min(calc(100% - 28px), var(--max)); }
  .jkr-brandmark img { width: 40px; height: 40px; }
  .jkr-brandmark span { font-size: 16px; }
  .jkr-beacon { display: block; padding: 38px 0 34px; }
  .jkr-index-rail { display: none; }
  .jkr-manifest h1 { font-size: 38px; }
  .jkr-proposition { font-size: 21px; }
  .jkr-hero-note { font-size: 14px; }
  .jkr-hero-actions { align-items: flex-start; flex-direction: column; gap: 15px; }
  .jkr-solid-link { width: 100%; justify-content: center; }
  .jkr-quick-proof { grid-template-columns: 1fr; }
  .jkr-quick-proof div + div { border-top: 1px solid var(--line); border-left: 0; }
  .jkr-evidence-poster { min-height: 420px; margin-top: 30px; }
  .jkr-shot-pair { inset: 30px 18px 54px; }
  .jkr-shot-pair img { width: 190px; }
  .jkr-shot-front { right: 0; }
  .jkr-shot-back { left: -22px; }
  .jkr-signal-strip { justify-content: flex-start; gap: 16px; white-space: nowrap; }
  .jkr-signal-strip span:nth-of-type(n+3), .jkr-signal-strip i:nth-of-type(n+2) { display: none; }
  .jkr-discovery { padding: 48px 0 44px; }
  .jkr-discovery h2, .jkr-gallery h2, .jkr-trust-route h2, .jkr-toolbelt h2, .jkr-community h2, .jkr-questions h2 { font-size: 27px; }
  .jkr-curation-note { display: block; }
  .jkr-curation-note strong { margin-top: 16px; }
  .jkr-curation-note p { margin-top: 10px; }
  .jkr-gallery { padding: 48px 14px; }
  .jkr-gallery-caption { display: block; margin-bottom: 26px; }
  .jkr-gallery-caption h2 { margin-bottom: 14px; }
  .jkr-screen-contact { grid-template-columns: repeat(4, 78vw); }
  .jkr-trust-route { padding: 48px 0 46px; }
  .jkr-route-intro { display: block; }
  .jkr-route-intro h2 { margin-bottom: 14px; }
  .jkr-route-line { grid-template-columns: 1fr; margin-top: 30px; gap: 0; }
  .jkr-route-line li { padding: 24px 0 20px 44px; border-bottom: 1px solid var(--line); }
  .jkr-route-line li::before { top: 30px; }
  .jkr-route-line i { position: absolute; top: 17px; left: 16px; font-size: 21px; }
  .jkr-route-line span { display: none; }
  .jkr-toolbelt-titlebox { padding: 46px 20px; }
  .jkr-toolbelt-list { grid-template-columns: 1fr; }
  .jkr-toolbelt-list article { min-height: auto; padding: 26px 22px; border-left: 0; border-bottom: 1px solid rgba(255,255,255,.2) !important; }
  .jkr-toolbelt-list article:last-child { border-bottom: 0 !important; }
  .jkr-community { padding: 50px 0 46px; }
  .jkr-voice-ledger article { grid-template-columns: 38px 1fr; }
  .jkr-voice-ledger p { grid-column: 2; align-items: flex-start; flex-direction: row; justify-content: space-between; margin-top: -9px; }
  .jkr-questions { padding: 46px 14px; }
  .jkr-question-stack summary { font-size: 15px; }
  .jkr-final-call { display: block; margin: 48px auto; padding: 38px 24px; }
  .jkr-final-copy h2 { font-size: 30px; }
  .jkr-final-copy a { justify-content: space-between; width: 100%; }
  .jkr-download-code { display: none; }
  .jkr-orbit-word { right: -35px; bottom: -28px; font-size: 140px; }
  .jkr-footer { grid-template-columns: 1fr; padding-bottom: 80px; }
  .jkr-footer-links { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}