:root {
  --ink: #050908;
  --ink-soft: #111816;
  --paper: #f3f4ef;
  --white: #ffffff;
  --text: #17201d;
  --muted: #66716d;
  --line: #d7ddd8;
  --line-dark: #29332f;
  --lime: #b9f34a;
  --lime-dark: #7ba724;
  --coral: #ff745f;
  --blue: #77b7ff;
  --amber: #ffc95c;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 82px; }
body { margin: 0; color: var(--text); background: var(--paper); font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif; line-height: 1.65; -webkit-font-smoothing: antialiased; }
body.nav-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { color: inherit; }
img { max-width: 100%; }
svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.container { width: min(var(--max), calc(100% - 48px)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 1000; top: 10px; left: 10px; padding: 10px 16px; color: var(--ink); background: var(--lime); transform: translateY(-150%); }
.skip-link:focus { transform: none; }
.security-bar { position: relative; z-index: 50; min-height: 38px; display: flex; align-items: center; color: #b7c2bd; background: #020403; font-size: 11px; }
.security-bar .container { display: flex; justify-content: center; align-items: center; gap: 8px; text-align: center; }
.security-bar strong { color: var(--white); }
.status-dot { width: 7px; height: 7px; flex: 0 0 auto; border-radius: 50%; background: var(--coral); box-shadow: 0 0 0 5px rgba(255,116,95,.12); }

.site-header { position: absolute; z-index: 40; top: 38px; left: 0; width: 100%; color: var(--white); }
.header-inner { height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 32px; border-bottom: 1px solid rgba(255,255,255,.14); }
.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand-mark { width: 34px; height: 38px; display: grid; place-items: center; color: var(--ink); background: var(--lime); clip-path: polygon(50% 0, 94% 18%, 88% 72%, 50% 100%, 12% 72%, 6% 18%); font-size: 17px; font-weight: 900; }
.brand-copy { display: flex; flex-direction: column; line-height: 1.1; }
.brand-copy strong { font-size: 17px; }
.brand-copy small { margin-top: 5px; color: #87958f; font-size: 9px; }
.site-nav { display: flex; align-items: center; gap: 30px; color: #b9c2be; font-size: 12px; font-weight: 700; }
.site-nav a { padding: 10px 0; }
.site-nav a:hover { color: var(--lime); }
.menu-button { display: none; width: 44px; height: 44px; padding: 0; place-items: center; border: 1px solid rgba(255,255,255,.22); background: rgba(5,9,8,.4); cursor: pointer; }
.menu-button svg { width: 21px; height: 21px; }

.hero { position: relative; min-height: 850px; display: flex; align-items: center; overflow: hidden; color: var(--white); background: var(--ink); }
.hero-image { position: absolute; inset: 0; background-color: var(--ink); background-image: url("assets/wallet-signing.jpg"); background-position: right 48%; background-size: auto 118%; background-repeat: no-repeat; }
.hero-shade { position: absolute; inset: 0; background: rgba(0,4,3,.68); }
.hero-shade::after { content: ""; position: absolute; inset: 0 43% 0 0; background: rgba(0,4,3,.77); }
.hero-inner { position: relative; z-index: 2; min-height: 850px; padding-top: 160px; padding-bottom: 96px; display: flex; align-items: center; justify-content: space-between; gap: 70px; }
.hero-copy { max-width: 790px; }
.eyebrow, .kicker { display: inline-block; color: #52605b; font-size: 10px; font-weight: 900; letter-spacing: 0; text-transform: uppercase; }
.eyebrow { padding: 7px 10px; color: var(--lime); border: 1px solid rgba(185,243,74,.38); background: rgba(5,9,8,.74); }
.hero h1 { max-width: 780px; margin: 25px 0 24px; font-size: 72px; line-height: 1.08; letter-spacing: 0; }
.hero h1 em { color: var(--lime); font-style: normal; }
.hero-copy > p { max-width: 650px; margin: 0; color: #bcc8c3; font-size: 17px; line-height: 1.8; }
.hero-actions { margin-top: 34px; display: flex; align-items: center; gap: 26px; }
.button { min-height: 54px; padding: 0 22px; display: inline-flex; align-items: center; justify-content: center; gap: 28px; border: 1px solid transparent; border-radius: 6px; font-size: 13px; font-weight: 900; transition: transform .2s, background .2s, border-color .2s; }
.button:hover { transform: translateY(-2px); }
.button svg { width: 18px; height: 18px; }
.button-primary { color: var(--ink); background: var(--lime); }
.button-primary:hover { background: #c9ff61; }
.text-link { padding-bottom: 3px; color: #d9e2de; border-bottom: 1px solid #75837d; font-size: 12px; font-weight: 800; }
.trust-list { margin: 27px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 20px; list-style: none; color: #87968f; font-size: 11px; }
.trust-list li { display: flex; align-items: center; gap: 6px; }
.trust-list svg { width: 14px; height: 14px; color: var(--lime); }
.hero-note { width: 270px; flex: 0 0 auto; align-self: flex-end; margin-bottom: 38px; padding: 20px; background: rgba(5,9,8,.84); border: 1px solid rgba(255,255,255,.19); backdrop-filter: blur(12px); }
.hero-note span, .hero-note strong, .hero-note small { display: block; }
.hero-note span { color: var(--lime); font-size: 9px; font-weight: 900; }
.hero-note strong { margin-top: 11px; font-size: 14px; line-height: 1.6; }
.hero-note small { margin-top: 9px; color: #8e9b96; font-size: 10px; }

.proof-strip { padding: 17px 0; color: #56615d; background: #e5e8e1; border-bottom: 1px solid #d0d5ce; }
.proof-strip .container { display: flex; justify-content: space-between; gap: 20px; }
.proof-strip span { font-size: 9px; font-weight: 900; }
.section { padding: 112px 0; }
.section-heading { max-width: 800px; margin-bottom: 54px; }
.section-heading h2, .split-heading h2, .pathfinder-intro h2, .red-flags h2, .faq-layout h2, .source-inner h2 { margin: 13px 0 18px; font-size: 52px; line-height: 1.15; letter-spacing: 0; }
.section-heading > p, .split-heading > p, .pathfinder-intro > p, .red-flags-layout > div > p, .faq-layout > div > p, .source-inner p { color: var(--muted); font-size: 15px; }
.split-heading { max-width: none; display: grid; grid-template-columns: 1.05fr .95fr; gap: 110px; align-items: end; }
.split-heading > p { margin: 0 0 8px; }
.kicker.light { color: #91a099; }
.kicker.danger { color: var(--coral); }

.basics { background: var(--white); }
.concept-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.concept-grid article { position: relative; min-height: 310px; padding: 34px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.concept-index { position: absolute; top: 32px; right: 32px; color: #a5afaa; font-size: 9px; font-weight: 900; }
.icon-box { width: 54px; height: 54px; display: grid; place-items: center; border-radius: 7px; }
.icon-box svg { width: 27px; height: 27px; }
.icon-box.lime { color: #587a15; background: #e4f7bd; }
.icon-box.coral { color: #a44031; background: #ffe0db; }
.icon-box.blue { color: #376da3; background: #deedff; }
.concept-grid h3 { margin: 30px 0 10px; font-size: 22px; }
.concept-grid p { margin: 0; color: var(--muted); font-size: 14px; }
.plain-rule { margin-top: 34px; padding: 25px 28px; display: grid; grid-template-columns: 150px 1fr; gap: 30px; align-items: center; color: var(--white); background: var(--ink); border-left: 5px solid var(--lime); }
.plain-rule span { color: var(--lime); font-size: 10px; font-weight: 900; }
.plain-rule p { margin: 0; font-size: 18px; }

.compare-section { color: var(--white); background: var(--ink); }
.compare-section .section-heading p { color: #8f9d97; }
.comparison { border-top: 1px solid var(--line-dark); }
.comparison-row { min-height: 88px; padding: 18px 20px; display: grid; grid-template-columns: 1.1fr 1.2fr 1.2fr .65fr; gap: 24px; align-items: center; border-bottom: 1px solid var(--line-dark); color: #b5c1bc; font-size: 13px; }
.comparison-row strong { display: flex; align-items: center; gap: 12px; color: var(--white); font-size: 15px; }
.comparison-row.featured { background: #101a16; border-left: 4px solid var(--lime); }
.comparison-head { min-height: 52px; color: #65736d; font-size: 9px; font-weight: 900; text-transform: uppercase; }
.signal { width: 9px; height: 9px; border-radius: 50%; }
.signal.hot { background: var(--coral); }
.signal.hardware { background: var(--lime); box-shadow: 0 0 0 5px rgba(185,243,74,.1); }
.signal.offline { background: var(--blue); }
.level { display: inline-block; min-width: 54px; padding: 5px 8px; border-radius: 4px; text-align: center; font-size: 10px; }
.level.easy { color: #bce088; background: #26351d; }
.level.medium { color: #ffdb8a; background: #392f18; }
.level.hard { color: #aad1ff; background: #1e3042; }
.table-note { margin: 22px 0 0; color: #718078; font-size: 11px; }

.pathfinder-section { background: #e8f1df; }
.pathfinder-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 90px; align-items: start; }
.pathfinder-intro { position: sticky; top: 40px; }
.privacy-note { margin-top: 30px; padding: 16px; display: flex; align-items: center; gap: 13px; background: rgba(255,255,255,.55); border: 1px solid #cbd9bf; }
.privacy-note svg { width: 26px; height: 26px; flex: 0 0 auto; color: #628a22; }
.privacy-note span { color: #66745e; font-size: 11px; }
.privacy-note strong { display: block; color: var(--text); font-size: 12px; }
.pathfinder { padding: 28px; background: var(--white); border: 1px solid #d0dcc6; box-shadow: 0 24px 60px rgba(45,67,32,.08); }
.pathfinder fieldset { margin: 0; padding: 22px 0; border: 0; border-bottom: 1px solid var(--line); }
.pathfinder legend { width: 100%; margin-bottom: 14px; font-size: 14px; font-weight: 900; }
.pathfinder legend span { margin-right: 10px; color: var(--lime-dark); font-size: 9px; }
.option-group { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.option-group button { min-height: 48px; padding: 8px 10px; border: 1px solid #cfd6d1; border-radius: 5px; background: #f9faf7; font-size: 11px; cursor: pointer; }
.option-group button:hover { border-color: #8aa14e; }
.option-group button.selected { color: var(--white); background: var(--ink); border-color: var(--ink); box-shadow: inset 0 -3px var(--lime); }
.path-result { margin-top: 22px; padding: 23px; background: var(--ink); border-left: 4px solid #44504b; color: var(--white); }
.path-result.ready { border-left-color: var(--lime); }
.path-result span, .path-result strong { display: block; }
.result-label { color: var(--lime); font-size: 9px; font-weight: 900; }
.path-result strong { margin-top: 8px; font-size: 20px; }
.path-result p { margin: 8px 0 0; color: #94a39c; font-size: 11px; }

.setup-section { background: var(--white); }
.timeline { margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); list-style: none; }
.timeline li { min-height: 265px; padding: 28px; display: flex; flex-direction: column; justify-content: space-between; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.step-number { color: var(--lime-dark); font-size: 10px; font-weight: 900; }
.timeline h3 { margin: 32px 0 8px; font-size: 18px; }
.timeline p { margin: 0; color: var(--muted); font-size: 12px; }

.editorial-band { position: relative; min-height: 620px; display: flex; align-items: center; overflow: hidden; color: var(--white); background: var(--ink); }
.editorial-image { position: absolute; inset: 0; background-color: var(--ink); background-image: url("assets/wallet-signing.jpg"); background-position: right 54%; background-size: auto 132%; background-repeat: no-repeat; opacity: .72; }
.editorial-band::after { content: ""; position: absolute; inset: 0; background: rgba(2,5,4,.48); }
.editorial-copy { position: relative; z-index: 2; }
.editorial-copy h2 { max-width: 760px; margin: 16px 0 18px; font-size: 64px; line-height: 1.1; }
.editorial-copy p { max-width: 560px; margin: 0; color: #c1cbc6; font-size: 16px; }

.red-flags { background: #fff6f3; }
.red-flags-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 90px; }
.red-flags ul { margin: 0; padding: 0; border-top: 1px solid #e3cfca; list-style: none; }
.red-flags li { padding: 22px 0; display: grid; grid-template-columns: 38px 1fr; gap: 16px; border-bottom: 1px solid #e3cfca; }
.red-flags li > svg { width: 28px; height: 28px; padding: 5px; color: var(--coral); background: #ffe1da; border-radius: 50%; }
.red-flags li strong { display: block; font-size: 14px; }
.red-flags li span { color: #735f5a; font-size: 12px; }

.scenario-section { background: var(--white); }
.scenario-tabs { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); border-bottom: 0; }
.scenario-tabs button { min-height: 70px; padding: 14px; border: 0; border-right: 1px solid var(--line); background: #f5f6f2; font-size: 12px; font-weight: 800; cursor: pointer; }
.scenario-tabs button:last-child { border-right: 0; }
.scenario-tabs button.active { color: var(--white); background: var(--ink); box-shadow: inset 0 -4px var(--lime); }
.scenario-panel { min-height: 230px; padding: 40px; display: grid; grid-template-columns: 170px 1fr; gap: 45px; align-items: center; color: var(--white); background: var(--ink); }
.scenario-status { min-height: 140px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; border: 1px solid #37423e; }
.scenario-status svg { width: 42px; height: 42px; }
.scenario-status span { font-size: 12px; font-weight: 900; }
.scenario-status.stop { color: var(--coral); }
.scenario-status.verify { color: var(--amber); }
.scenario-status.safe { color: var(--lime); }
.scenario-panel h3 { margin: 0 0 10px; font-size: 24px; }
.scenario-panel p { margin: 0; color: #91a099; font-size: 13px; }

.checklist-section { color: var(--white); background: var(--ink); }
.checklist-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 90px; align-items: start; }
.checklist-intro { position: sticky; top: 40px; }
.checklist-intro h2 { margin: 14px 0 18px; font-size: 52px; line-height: 1.15; }
.checklist-intro > p { color: #8b9a93; }
.check-progress-copy { margin-top: 40px; display: flex; justify-content: space-between; align-items: end; gap: 20px; }
.check-progress-copy strong { color: var(--lime); font-size: 30px; }
.check-progress-copy span { color: #798981; font-size: 11px; }
.progress-track { height: 6px; margin-top: 12px; overflow: hidden; background: #26312c; border-radius: 4px; }
.progress-track span { display: block; width: 0; height: 100%; background: var(--lime); transition: width .25s; }
.safety-checklist { padding: 24px 28px; color: var(--text); background: var(--white); border: 1px solid #29332f; }
.safety-checklist label { position: relative; padding: 18px 2px; display: grid; grid-template-columns: 28px 1fr 24px; gap: 13px; align-items: start; border-bottom: 1px solid var(--line); cursor: pointer; }
.safety-checklist input { position: absolute; opacity: 0; pointer-events: none; }
.check-box { width: 25px; height: 25px; display: grid; place-items: center; border: 1px solid #aab5af; border-radius: 4px; }
.check-box svg { width: 15px; height: 15px; color: transparent; }
.safety-checklist input:checked + .check-box { background: var(--ink); border-color: var(--ink); }
.safety-checklist input:checked + .check-box svg { color: var(--lime); }
.safety-checklist input:focus-visible + .check-box { outline: 3px solid rgba(119,183,255,.5); }
.safety-checklist label strong, .safety-checklist label small { display: block; }
.safety-checklist label strong { font-size: 14px; }
.safety-checklist label small { margin-top: 3px; color: #78847f; font-size: 11px; }
.safety-checklist label > b { color: #a5afaa; font-size: 9px; }
.check-result { margin-top: 20px; min-height: 58px; padding: 16px; display: flex; align-items: center; color: #6d7a74; background: #eff2ec; border-left: 4px solid #c4cbc6; font-size: 11px; }
.check-result.complete { color: var(--text); background: #edf7dc; border-left-color: var(--lime-dark); font-weight: 800; }

.faq-section { background: var(--paper); }
.faq-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 100px; align-items: start; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 20px; cursor: pointer; font-size: 14px; font-weight: 900; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary svg { width: 18px; height: 18px; flex: 0 0 auto; transition: transform .2s; }
.faq-list details[open] summary svg { transform: rotate(180deg); }
.faq-list details p { margin: -3px 48px 24px 0; color: var(--muted); font-size: 13px; }

.source-section { padding: 90px 0; color: var(--white); background: #16271f; border-top: 6px solid var(--blue); }
.source-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 100px; align-items: center; }
.source-inner p { margin-top: 0; color: #a9b8b1; }
.button-secondary { margin-top: 12px; color: var(--white); border-color: #6f837a; background: transparent; }
.button-secondary:hover { border-color: var(--lime); }

.site-footer { padding: 58px 0 24px; color: #8b9993; background: #020403; }
.footer-main { display: flex; justify-content: space-between; gap: 60px; align-items: flex-start; }
.footer-brand { color: var(--white); }
.footer-main p { margin: 12px 0 0; color: #53615b; font-size: 11px; }
.footer-main nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 24px; font-size: 11px; }
.footer-main nav a:hover { color: var(--lime); }
.footer-legal { margin-top: 42px; padding-top: 20px; display: flex; justify-content: space-between; gap: 30px; border-top: 1px solid #17201c; color: #52605a; font-size: 9px; }

.legal-body { background: var(--white); }
.legal-header { color: var(--white); background: var(--ink); }
.legal-header .header-inner { border-bottom: 0; }
.legal-back { color: #a7b4ae; font-size: 12px; font-weight: 800; }
.legal-back:hover { color: var(--lime); }
.legal-main { width: min(830px, calc(100% - 48px)); margin-inline: auto; padding: 82px 0 110px; }
.legal-main h1 { margin: 14px 0 8px; font-size: 54px; line-height: 1.1; }
.legal-main h2 { margin: 38px 0 10px; font-size: 21px; }
.legal-main p, .legal-main li { color: var(--muted); font-size: 14px; }
.legal-main ul { padding-left: 20px; }
.updated { margin: 0 0 30px; color: #89948f; font-size: 11px; }
.notice { margin: 30px 0 40px; padding: 21px; background: #edf5e3; border-left: 4px solid var(--lime-dark); }
.notice strong { color: var(--text); }

@media (max-width: 980px) {
  .site-nav { gap: 18px; }
  .hero h1 { font-size: 58px; }
  .hero-note { display: none; }
  .proof-strip .container { flex-wrap: wrap; justify-content: center; }
  .split-heading, .pathfinder-layout, .red-flags-layout, .checklist-layout, .faq-layout, .source-inner { grid-template-columns: 1fr; gap: 48px; }
  .pathfinder-intro, .checklist-intro { position: static; }
  .concept-grid { grid-template-columns: 1fr 1fr; }
  .concept-grid article:last-child { grid-column: 1 / -1; }
  .timeline { grid-template-columns: 1fr 1fr; }
  .editorial-copy h2 { font-size: 52px; }
}

@media (max-width: 760px) {
  .container { width: min(100% - 30px, var(--max)); }
  .security-bar { min-height: 44px; }
  .security-bar .container { line-height: 1.3; }
  .site-header { top: 44px; }
  .header-inner { height: 68px; }
  .menu-button { display: grid; }
  .site-nav { position: fixed; inset: 112px 0 0; padding: 32px 24px; display: none; flex-direction: column; align-items: stretch; gap: 0; color: var(--white); background: rgba(5,9,8,.98); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 17px 0; border-bottom: 1px solid #25302b; font-size: 15px; }
  .hero, .hero-inner { min-height: 760px; }
  .hero-inner { padding-top: 150px; padding-bottom: 70px; }
  .hero-image { background-position: right 52%; background-size: auto 150%; }
  .hero-shade { background: rgba(0,4,3,.77); }
  .hero-shade::after { display: none; }
  .hero h1 { font-size: 43px; line-height: 1.15; }
  .hero-copy > p { font-size: 15px; }
  .hero-actions { align-items: stretch; flex-direction: column; gap: 16px; }
  .button { width: 100%; justify-content: space-between; }
  .text-link { width: fit-content; }
  .proof-strip span { width: calc(50% - 10px); text-align: center; }
  .section { padding: 76px 0; }
  .section-heading h2, .split-heading h2, .pathfinder-intro h2, .red-flags h2, .faq-layout h2, .source-inner h2, .checklist-intro h2 { font-size: 38px; }
  .section-heading { margin-bottom: 36px; }
  .concept-grid, .timeline { grid-template-columns: 1fr; }
  .concept-grid article:last-child { grid-column: auto; }
  .concept-grid article { min-height: 250px; }
  .plain-rule { grid-template-columns: 1fr; gap: 8px; }
  .comparison { overflow-x: auto; }
  .comparison-row { min-width: 720px; }
  .pathfinder { padding: 20px; }
  .option-group { grid-template-columns: 1fr; }
  .timeline li { min-height: 230px; }
  .editorial-band { min-height: 520px; }
  .editorial-image { background-position: right 58%; background-size: auto 150%; }
  .editorial-copy h2 { font-size: 43px; }
  .scenario-tabs { grid-template-columns: 1fr; border-bottom: 1px solid var(--line); }
  .scenario-tabs button { border-right: 0; border-bottom: 1px solid var(--line); }
  .scenario-tabs button:last-child { border-bottom: 0; }
  .scenario-panel { padding: 28px 22px; grid-template-columns: 1fr; gap: 24px; }
  .scenario-status { min-height: 100px; }
  .safety-checklist { padding: 17px; }
  .safety-checklist label { grid-template-columns: 26px 1fr 20px; gap: 10px; }
  .source-section { padding: 72px 0; }
  .footer-main, .footer-legal { flex-direction: column; }
  .footer-main nav { justify-content: flex-start; }
  .footer-legal { gap: 8px; }
  .legal-main { width: calc(100% - 30px); padding: 62px 0 90px; }
  .legal-main h1 { font-size: 42px; }
}

@media (max-width: 390px) {
  .hero h1 { font-size: 38px; }
  .trust-list { gap: 10px 14px; }
  .brand-copy small { display: none; }
}

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