:root {
  --ink: #151713;
  --paper: #f1f5ef;
  --paper-strong: #e2e9df;
  --white: #fbfef9;
  --acid: #b9ff38;
  --orange: #10d95a;
  --mint: #8ff0b2;
  --muted: #686b62;
  --line: rgba(21, 23, 19, 0.14);
  --shadow: 0 24px 60px rgba(21, 23, 19, 0.1);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
}
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  height: 76px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 4.5vw;
  background: rgba(244, 242, 233, 0.88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}
.brand { display: inline-flex; align-items: center; gap: 11px; width: fit-content; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 35px;
  height: 35px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--acid);
  font: 700 18px/1 Arial, sans-serif;
  transform: rotate(-8deg);
}
.brand > span:last-child { display: flex; flex-direction: column; gap: 2px; }
.brand b { font-size: 15px; letter-spacing: .08em; }
.brand small { color: var(--muted); font: 700 8px/1 Arial, sans-serif; letter-spacing: .16em; }
.topbar nav { display: flex; align-items: center; gap: 30px; font-size: 13px; font-weight: 700; }
.topbar nav a { position: relative; }
.topbar nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -7px; height: 2px; background: var(--orange); transition: right .2s ease; }
.topbar nav a:hover::after { right: 0; }
.ghost-button { justify-self: end; border: 1px solid var(--ink); border-radius: 999px; padding: 9px 15px; background: transparent; font-size: 12px; font-weight: 700; cursor: pointer; }
.ghost-button:hover { background: var(--ink); color: var(--white); }

.hero {
  min-height: 710px;
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  align-items: center;
  gap: 5vw;
  padding: 72px 7vw 84px;
  overflow: hidden;
  background:
    radial-gradient(circle at 91% 11%, rgba(28, 226, 96, .26), transparent 24%),
    radial-gradient(circle at 15% 82%, rgba(150, 244, 184, .34), transparent 26%),
    var(--paper);
}
.eyebrow { margin: 0 0 22px; display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 12px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.eyebrow span { width: 28px; height: 2px; background: var(--orange); }
.hero h1 { max-width: 730px; margin: 0; font-size: clamp(48px, 6.4vw, 92px); line-height: .99; letter-spacing: -.065em; font-weight: 900; }
.hero h1 strong { color: var(--orange); font-weight: 900; }
.hero-lead { max-width: 660px; margin: 30px 0 0; color: #464940; font-size: 18px; line-height: 1.8; }
.hero-actions { display: flex; align-items: center; gap: 26px; margin-top: 34px; }
.primary-button { display: inline-flex; align-items: center; justify-content: center; gap: 22px; border: 0; border-radius: 999px; padding: 15px 22px; background: var(--ink); color: var(--white); font-size: 14px; font-weight: 800; cursor: pointer; }
.primary-button:hover { background: var(--orange); }
.primary-button span { color: var(--acid); font-size: 18px; }
.text-button { border-bottom: 1px solid var(--ink); padding: 8px 0; font-size: 13px; font-weight: 800; }
.hero-stats { display: flex; gap: 44px; margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--line); width: fit-content; }
.hero-stats div { display: flex; align-items: baseline; gap: 8px; }
.hero-stats strong { font: 800 30px/1 Arial, sans-serif; }
.hero-stats span { color: var(--muted); font-size: 12px; }

.brand-showcase { position: relative; aspect-ratio: 1.02; max-width: 590px; width: 100%; justify-self: center; margin: 0; }
.brand-showcase::before { content: ""; position: absolute; inset: -22px 20px 20px -22px; border: 1px solid rgba(21,23,19,.2); border-radius: 50%; transform: rotate(-9deg); }
.brand-showcase img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 66% center; border-radius: 46% 46% 22px 46%; filter: saturate(1.08) contrast(1.03); box-shadow: var(--shadow); }
.brand-showcase::after { content: ""; position: absolute; inset: 0; border-radius: 46% 46% 22px 46%; background: linear-gradient(180deg, transparent 42%, rgba(0,27,17,.88) 100%); }
.brand-showcase figcaption { position: absolute; z-index: 2; left: 34px; right: 34px; bottom: 28px; color: white; }
.brand-showcase figcaption span { color: var(--acid); font: 800 10px/1 Arial, sans-serif; letter-spacing: .14em; }
.brand-showcase figcaption strong { display: block; margin-top: 10px; font-size: 26px; line-height: 1.18; letter-spacing: -.03em; }
.brand-showcase figcaption p { margin: 11px 0 0; color: rgba(255,255,255,.68); font-size: 10px; letter-spacing: .12em; }
.brand-orbit { position: absolute; z-index: 3; top: -12px; right: 15px; width: 74px; height: 74px; border-radius: 50%; border: 13px solid rgba(185,255,56,.85); box-shadow: inset 0 0 0 1px rgba(21,23,19,.28), 0 10px 30px rgba(16,217,90,.24); }

.section { padding: 104px 7vw; }
.section-heading { display: grid; grid-template-columns: 1fr minmax(280px, 430px); align-items: end; gap: 40px; margin-bottom: 46px; }
.section-heading h2, .mvp-intro h2, .meeting h2 { margin: 0; font-size: clamp(34px, 4vw, 58px); line-height: 1.08; letter-spacing: -.045em; }
.section-heading > p { margin: 0; color: var(--muted); line-height: 1.8; }

.blueprint { background: var(--ink); color: var(--white); }
.blueprint .eyebrow, .blueprint .section-heading > p { color: #b5b8ae; }
.architecture-flow { display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid rgba(255,255,255,.17); border-bottom: 1px solid rgba(255,255,255,.17); }
.architecture-item { position: relative; min-height: 210px; padding: 28px 24px 24px 0; display: flex; flex-direction: column; justify-content: space-between; }
.architecture-item:not(:last-child) { border-right: 1px solid rgba(255,255,255,.17); margin-right: 24px; }
.architecture-number { color: var(--acid); font: 700 12px/1 Arial, sans-serif; letter-spacing: .12em; }
.architecture-item h3 { margin: 0 0 10px; font-size: 21px; }
.architecture-item p { margin: 0; color: #aeb1a7; font-size: 13px; line-height: 1.6; }
.flow-arrow { position: absolute; right: -10px; top: 50%; transform: translateY(-50%); width: 20px; height: 20px; display: grid; place-items: center; border-radius: 50%; background: var(--acid); color: var(--ink); font-size: 12px; }
.principle-strip { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.principle-strip > span { margin-right: 20px; color: #8e9188; font-size: 11px; letter-spacing: .15em; }
.principle-strip strong { font-size: 14px; }
.principle-strip i { color: var(--orange); font-style: normal; }

.library { background: var(--white); }
.library-tools { display: flex; align-items: center; justify-content: space-between; gap: 30px; margin-bottom: 32px; }
.filter-group { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-group button { border: 1px solid var(--line); border-radius: 999px; padding: 9px 16px; background: transparent; color: var(--muted); font-size: 12px; font-weight: 800; cursor: pointer; }
.filter-group button.active, .filter-group button:hover { background: var(--ink); color: var(--white); border-color: var(--ink); }
.search-box { display: flex; align-items: center; gap: 10px; border-bottom: 1px solid var(--ink); padding: 7px 0; }
.search-box span { color: var(--muted); font-size: 11px; font-weight: 800; }
.search-box input { width: 220px; border: 0; outline: 0; background: transparent; color: var(--ink); font-size: 13px; }
.project-layout { display: grid; grid-template-columns: minmax(420px, .85fr) minmax(460px, 1.15fr); gap: 34px; align-items: start; }
.module-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.module-card { min-height: 190px; display: flex; flex-direction: column; text-align: left; padding: 20px; border: 1px solid var(--line); border-radius: 18px; background: transparent; color: var(--ink); cursor: pointer; transition: transform .2s ease, background .2s ease, border-color .2s ease; }
.module-card:hover { transform: translateY(-3px); border-color: rgba(21,23,19,.45); }
.module-card.selected { background: var(--acid); border-color: var(--ink); box-shadow: 5px 5px 0 var(--ink); }
.module-meta, .module-footer { display: flex; align-items: center; justify-content: space-between; }
.module-meta span { font: 800 12px/1 Arial, sans-serif; }
.module-meta em { color: var(--muted); font-size: 10px; font-style: normal; }
.module-card h3 { margin: 28px 0 8px; font-size: 19px; }
.module-card > p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.55; }
.module-footer { margin-top: auto; padding-top: 18px; font-size: 10px; }
.module-footer span { padding: 4px 8px; border-radius: 999px; background: rgba(21,23,19,.08); }
.module-footer b { font-weight: 800; }
.empty-state { grid-column: 1 / -1; padding: 80px 20px; text-align: center; color: var(--muted); border: 1px dashed var(--line); border-radius: 18px; }

.detail-panel { position: sticky; top: 96px; padding: 34px; border-radius: 24px; background: var(--ink); color: var(--white); box-shadow: var(--shadow); max-height: calc(100vh - 120px); overflow-y: auto; scrollbar-width: thin; }
.detail-topline { display: flex; align-items: center; justify-content: space-between; color: var(--acid); font: 800 11px/1 Arial, sans-serif; letter-spacing: .1em; }
.detail-topline em { color: #aeb1a7; font-style: normal; letter-spacing: 0; }
.detail-panel > h2 { margin: 24px 0 10px; font-size: 36px; letter-spacing: -.04em; }
.detail-summary { margin: 0 0 25px; color: #bfc1ba; line-height: 1.7; }
.detail-tags { display: flex; flex-wrap: wrap; gap: 7px; margin: -10px 0 22px; }
.detail-tags span { padding: 5px 9px; border: 1px solid rgba(255,255,255,.2); border-radius: 999px; color: #c9cbc4; font-size: 9px; }
.detail-callout { display: grid; grid-template-columns: 76px 1fr; gap: 15px; padding: 17px 0; border-top: 1px solid rgba(255,255,255,.16); }
.detail-callout.compact { border-bottom: 1px solid rgba(255,255,255,.16); }
.detail-callout span { color: var(--acid); font-size: 11px; font-weight: 800; }
.detail-callout p { margin: 0; font-size: 13px; line-height: 1.6; }
.detail-section { margin-top: 28px; }
.detail-panel h3 { margin: 0 0 14px; font-size: 13px; }
.detail-section ol { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.detail-section li { display: flex; align-items: center; gap: 10px; min-height: 42px; padding: 8px 10px; border-radius: 9px; background: rgba(255,255,255,.07); color: #e4e5df; font-size: 11px; }
.detail-section li span { color: var(--orange); font: 800 10px/1 Arial, sans-serif; }
.detail-columns { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 28px; }
.detail-columns ul { margin: 0; padding: 0; list-style: none; }
.detail-columns li { position: relative; padding-left: 12px; margin: 7px 0; color: #bfc1ba; font-size: 11px; line-height: 1.45; }
.detail-columns li::before { content: ""; position: absolute; left: 0; top: .52em; width: 4px; height: 4px; border-radius: 50%; background: var(--acid); }
.guardrail-box { margin-top: 26px; padding: 18px; background: rgba(255,107,53,.12); border-left: 3px solid var(--orange); }
.guardrail-box h3 { color: #ffad90; }
.guardrail-box p { margin: 7px 0; color: #e2c4b8; font-size: 11px; }

.mvp-band { display: grid; grid-template-columns: .85fr 1.15fr; gap: 7vw; padding: 82px 7vw; background: var(--orange); color: var(--white); }
.eyebrow.light { color: rgba(255,255,255,.72); }
.eyebrow.light span { background: var(--acid); }
.mvp-intro > p:last-child { max-width: 520px; color: rgba(255,255,255,.8); line-height: 1.8; }
.mvp-chain { display: flex; align-items: center; }
.mvp-chain > div { flex: 1; min-height: 180px; padding: 22px; border: 1px solid rgba(255,255,255,.34); border-radius: 18px; background: rgba(255,255,255,.07); }
.mvp-chain > b { padding: 0 12px; color: var(--acid); }
.mvp-chain span { color: var(--acid); font: 800 11px/1 Arial, sans-serif; }
.mvp-chain h3 { margin: 42px 0 8px; font-size: 18px; }
.mvp-chain p { margin: 0; color: rgba(255,255,255,.75); font-size: 11px; line-height: 1.5; }

.roadmap { background: var(--paper); }
.roadmap-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.roadmap-grid article { min-height: 330px; padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.36); display: flex; flex-direction: column; }
.roadmap-head { display: flex; justify-content: space-between; align-items: center; }
.roadmap-head span { font-size: 11px; font-weight: 900; }
.roadmap-head em { color: var(--muted); font-size: 10px; font-style: normal; }
.roadmap-grid h3 { margin: 60px 0 18px; font-size: 20px; }
.roadmap-grid ul { margin: 0; padding: 0; list-style: none; }
.roadmap-grid li { margin: 10px 0; color: var(--muted); font-size: 12px; line-height: 1.55; }
.roadmap-grid li::before { content: "— "; color: var(--orange); }
.roadmap-line { height: 4px; margin-top: auto; background: var(--paper-strong); overflow: hidden; }
.roadmap-line i { display: block; height: 100%; background: var(--orange); }

.meeting { display: grid; grid-template-columns: .72fr 1.28fr; gap: 8vw; background: var(--acid); }
.meeting-copy { position: sticky; top: 105px; align-self: start; }
.meeting-copy > p:not(.eyebrow) { max-width: 440px; color: #4f5348; line-height: 1.8; }
.meeting-copy .primary-button { margin-top: 18px; }
.question-list { border-top: 1px solid rgba(21,23,19,.3); }
.question-list > div { min-height: 82px; display: grid; grid-template-columns: 42px 1fr auto; align-items: center; gap: 20px; border-bottom: 1px solid rgba(21,23,19,.3); }
.question-list span { font: 800 11px/1 Arial, sans-serif; }
.question-list p { margin: 0; font-size: 16px; font-weight: 800; }
.question-list p small { display: block; margin-top: 7px; color: #4f5348; font-size: 11px; font-weight: 500; }
.question-list i { padding: 5px 9px; border: 1px solid rgba(21,23,19,.35); border-radius: 999px; font-size: 9px; font-style: normal; }

footer { min-height: 160px; padding: 42px 7vw; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; background: var(--ink); color: var(--white); }
.footer-brand small { color: #8f9289; }
footer > p { color: #989b92; font-size: 11px; }
.footer-links { justify-self: end; display: flex; gap: 20px; }
.footer-links a { color: var(--acid); font-size: 11px; font-weight: 800; }

@media (max-width: 1100px) {
  .topbar { grid-template-columns: 1fr auto; }
  .topbar nav { display: none; }
  .hero { grid-template-columns: 1fr 420px; padding-inline: 5vw; }
  .project-layout { grid-template-columns: 1fr; }
  .module-grid { grid-template-columns: repeat(3, 1fr); }
  .detail-panel { position: static; max-height: none; }
  .roadmap-grid { grid-template-columns: repeat(2, 1fr); }
  .mvp-band { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .topbar { height: 66px; padding: 0 20px; }
  .ghost-button { font-size: 0; width: 38px; height: 38px; padding: 0; }
  .ghost-button::after { content: "PDF"; font-size: 10px; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding: 60px 22px 70px; }
  .hero h1 { font-size: 50px; }
  .hero-lead { font-size: 15px; }
  .hero-stats { width: 100%; justify-content: space-between; gap: 8px; }
  .hero-stats div { flex-direction: column; }
  .brand-showcase { max-width: 390px; margin-top: 18px; }
  .brand-showcase figcaption { left: 24px; bottom: 22px; }
  .brand-showcase figcaption strong { font-size: 21px; }
  .section { padding: 74px 22px; }
  .section-heading { grid-template-columns: 1fr; gap: 18px; margin-bottom: 32px; }
  .architecture-flow { grid-template-columns: 1fr; }
  .architecture-item { min-height: auto; flex-direction: row; gap: 20px; align-items: flex-start; padding: 22px 0; }
  .architecture-item:not(:last-child) { margin: 0; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.17); }
  .architecture-item > div { flex: 1; }
  .flow-arrow { display: none; }
  .principle-strip { justify-content: flex-start; }
  .principle-strip > span { width: 100%; }
  .library-tools { align-items: stretch; flex-direction: column; }
  .search-box input { width: 100%; }
  .module-grid { grid-template-columns: 1fr; }
  .module-card { min-height: 170px; }
  .detail-panel { padding: 25px 20px; border-radius: 18px; }
  .detail-panel > h2 { font-size: 30px; }
  .detail-section ol, .detail-columns { grid-template-columns: 1fr; }
  .mvp-band { padding: 68px 22px; }
  .mvp-chain { flex-direction: column; align-items: stretch; }
  .mvp-chain > b { text-align: center; transform: rotate(90deg); padding: 6px; }
  .mvp-chain > div { min-height: 140px; }
  .mvp-chain h3 { margin-top: 28px; }
  .roadmap-grid { grid-template-columns: 1fr; }
  .roadmap-grid article { min-height: 260px; }
  .roadmap-grid h3 { margin-top: 36px; }
  .meeting { grid-template-columns: 1fr; gap: 50px; }
  .meeting-copy { position: static; }
  .question-list > div { grid-template-columns: 32px 1fr; padding: 18px 0; }
  .question-list i { grid-column: 2; justify-self: start; }
  footer { grid-template-columns: 1fr; gap: 22px; text-align: left; }
  .footer-links { justify-self: start; }
}

@media print {
  .print-hide, .topbar nav, .brand-showcase { display: none !important; }
  .topbar { position: static; grid-template-columns: 1fr; background: white; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-block: 55px; }
  .section { padding-block: 60px; break-inside: avoid; }
  .project-layout { grid-template-columns: 1fr; }
  .module-grid { grid-template-columns: repeat(3, 1fr); }
  .detail-panel { display: none; }
  .module-card { break-inside: avoid; }
  .roadmap-grid { grid-template-columns: repeat(2, 1fr); }
  .meeting { grid-template-columns: 1fr 1fr; }
}