/* Weft 产品导览统一入口。 */
:root {
  --bg: oklch(98% 0.005 250);
  --surface: oklch(100% 0 0);
  --fg: oklch(22% 0.02 240);
  --muted: oklch(50% 0.018 240);
  --border: oklch(90% 0.008 240);
  --accent: oklch(58% 0.16 145);
  --accent-dark: oklch(45% 0.13 145);
  --accent-bg: oklch(96% 0.03 145);
  --game: oklch(62% 0.17 46);
  --game-dark: oklch(48% 0.15 44);
  --game-bg: oklch(96% 0.035 52);
  --warn: oklch(54% 0.11 77);
  --warn-bg: oklch(96% 0.035 80);
  --dark: oklch(19% 0.025 240);
  --dark-surface: oklch(24% 0.024 240);
  --dark-muted: oklch(76% 0.012 240);
  --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, Menlo, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--fg);
  background-color: var(--bg);
  background-image:
    linear-gradient(to right, color-mix(in oklch, var(--border) 42%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in oklch, var(--border) 42%, transparent) 1px, transparent 1px);
  background-size: 32px 32px;
  font: 16px/1.75 var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
code, pre { font-family: var(--font-mono); }
.shell { width: min(1240px, calc(100% - 64px)); margin-inline: auto; }
section[id] { scroll-margin-top: 82px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: 72px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 28px;
  padding: 0 max(32px, calc((100vw - 1240px) / 2));
  background: color-mix(in oklch, var(--surface) 92%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(18px);
}

.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; font: 600 14px/1 var(--font-mono); letter-spacing: .06em; }
.brand b { margin-left: 6px; color: var(--muted); font-weight: 500; }
.mark { width: 22px; height: 22px; display: grid; grid-template-columns: 1fr 1fr; gap: 3px; transform: rotate(45deg); }
.mark i { background: var(--fg); }
.mark i:nth-child(2) { background: var(--accent); }
.site-header nav { display: flex; gap: 28px; font-size: 14px; font-weight: 550; }
.site-header nav a { padding: 12px 0; text-decoration: none; border-bottom: 1px solid transparent; }
.site-header nav a:hover { border-color: var(--fg); }
.doc-link { justify-self: end; min-height: 42px; display: inline-flex; align-items: center; padding: 0 14px; background: var(--surface); border: 1px solid var(--border); border-radius: 4px; font-size: 13px; text-decoration: none; }
.doc-link:hover { color: var(--surface); background: var(--fg); border-color: var(--fg); }

.hero { min-height: 690px; display: grid; grid-template-columns: 1.15fr .85fr; gap: 10%; align-items: center; padding-block: 110px; }
.eyebrow, .kicker { margin: 0 0 18px; color: var(--muted); font: 550 12px/1.4 var(--font-mono); letter-spacing: .1em; }
.hero h1 { margin: 0; max-width: 780px; white-space: nowrap; font: 600 clamp(52px, 5.4vw, 78px)/1.28 var(--font-sans); letter-spacing: -.035em; }
.lead { max-width: 64ch; margin: 30px 0 0; color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.hero-actions a { min-height: 52px; display: inline-flex; align-items: center; justify-content: center; padding: 0 20px; border: 1px solid var(--fg); border-radius: 4px; font-weight: 650; text-decoration: none; }
.hero-actions .primary { min-width: 224px; justify-content: space-between; gap: 28px; color: var(--surface); background: var(--fg); }
.hero-actions .primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); }
.hero-actions .secondary { background: var(--surface); }
.hero-actions .secondary:hover { background: var(--border); }
.manifest { position: relative; margin: 0; background: var(--surface); border: 1px solid var(--border); box-shadow: 0 26px 80px color-mix(in oklch, var(--fg) 8%, transparent); }
.manifest::before { content: "SITE MANIFEST"; position: absolute; top: -28px; right: 0; color: var(--muted); font: 11px/1 var(--font-mono); letter-spacing: .12em; }
.manifest > div { min-height: 124px; display: grid; grid-template-columns: 58px 1fr; gap: 18px; align-items: center; padding: 22px 28px; border-bottom: 1px solid var(--border); }
.manifest > div:last-child { border-bottom: 0; }
.manifest > div > span { width: 48px; height: 48px; display: grid; place-items: center; background: var(--bg); border: 1px solid var(--border); border-radius: 50%; font: 12px/1 var(--font-mono); }
.manifest > div:nth-child(2) > span { color: var(--surface); background: var(--accent); border-color: var(--accent); }
.manifest p { margin: 0; }
.manifest b, .manifest small { display: block; }
.manifest b { font-size: 18px; }
.manifest small { margin-top: 3px; color: var(--muted); font-size: 13px; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); color: var(--surface); background: var(--fg); }
.stats > div { min-height: 130px; display: flex; flex-direction: column; justify-content: center; padding: 24px max(24px, calc((100vw - 1240px) / 8)); border-right: 1px solid color-mix(in oklch, var(--surface) 15%, transparent); }
.stats > div:last-child { border-right: 0; }
.stats strong { font: 600 30px/1 var(--font-mono); }
.stats span { margin-top: 10px; color: var(--dark-muted); font-size: 13px; }

.business-intro { padding-block: 112px; background: var(--surface); border-bottom: 1px solid var(--border); }
.business-intro-grid { display: grid; grid-template-columns: .92fr 1.08fr; gap: 8%; align-items: center; }
.business-intro-copy h2 { margin: 0; font: 600 clamp(38px, 4.4vw, 58px)/1.3 var(--font-sans); letter-spacing: -.03em; }
.business-intro-copy > p:not(.kicker) { max-width: 58ch; margin: 26px 0 0; color: var(--muted); font-size: 17px; }
.business-intro-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 22px; margin-top: 34px; }
.business-intro-actions a { min-height: 50px; display: inline-flex; align-items: center; gap: 36px; padding: 0 19px; color: var(--surface); background: var(--fg); border: 1px solid var(--fg); border-radius: 4px; font-weight: 650; text-decoration: none; }
.business-intro-actions a:hover { background: var(--game-dark); border-color: var(--game-dark); }
.business-intro-actions small { color: var(--muted); font: 11px/1.4 var(--font-mono); }
.business-intro-status { display: grid; grid-template-columns: 1fr 1fr; margin-top: 34px; border-top: 1px solid var(--border); }
.business-intro-status span { padding: 17px 16px 0 0; color: var(--muted); font-size: 12px; }
.business-intro-status span + span { padding-left: 16px; border-left: 1px solid var(--border); }
.business-intro-status b { display: block; margin-bottom: 4px; color: var(--fg); font: 600 11px/1.4 var(--font-mono); letter-spacing: .08em; }
.business-intro-system { display: grid; grid-template-columns: 1fr 86px 1fr; background: var(--surface); border: 1px solid var(--border); box-shadow: 0 28px 80px color-mix(in oklch, var(--fg) 8%, transparent); }
.business-intro-system article { min-height: 360px; display: flex; flex-direction: column; padding: 28px 26px; }
.business-intro-system .intro-tool { background: var(--accent-bg); }
.business-intro-system .intro-game { background: var(--game-bg); }
.business-intro-system article > span { color: var(--muted); font: 550 11px/1.4 var(--font-mono); letter-spacing: .09em; }
.business-intro-system h3 { margin: 82px 0 10px; font: 600 28px/1.35 var(--font-sans); }
.business-intro-system p { margin: 0; color: var(--muted); font-size: 14px; }
.business-intro-system em { width: fit-content; margin-top: auto; padding: 5px 8px; background: var(--surface); border: 1px solid currentColor; border-radius: 999px; font: normal 10px/1.4 var(--font-mono); }
.intro-tool em { color: var(--accent-dark); }
.intro-game em { color: var(--game-dark); }
.intro-exchange { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 15px; padding-block: 18px; color: var(--muted); background: var(--surface); border-inline: 1px solid var(--border); }
.intro-exchange b { writing-mode: vertical-rl; font: 550 10px/1 var(--font-mono); letter-spacing: .12em; }
.intro-exchange i { color: var(--fg); font: normal 24px/1 var(--font-mono); }

.audiences { padding-block: 120px; background: var(--surface); border-bottom: 1px solid var(--border); }
.audience-head { margin-bottom: 44px; }
.audience-grid { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--border); }
.audience-grid article { min-height: 360px; display: flex; flex-direction: column; padding: 34px; border-right: 1px solid var(--border); }
.audience-grid article:last-child { border-right: 0; }
.audience-grid article > span { color: var(--muted); font: 550 11px/1.4 var(--font-mono); letter-spacing: .09em; }
.audience-grid h3 { max-width: 10ch; margin: 58px 0 12px; font: 600 26px/1.4 var(--font-sans); }
.audience-grid p { margin: 0; color: var(--muted); }
.audience-grid article > a { margin-top: auto; padding-top: 24px; border-top: 1px solid var(--border); font-size: 13px; font-weight: 650; text-decoration: none; }
.audience-grid article > a b { margin-left: 10px; color: var(--accent-dark); }
.audience-grid article > a:hover { color: var(--accent-dark); }

.section { padding-block: 120px; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 48px; margin-bottom: 44px; }
.section-head h2 { margin: 0; font: 600 clamp(36px, 4vw, 52px)/1.3 var(--font-sans); letter-spacing: -.025em; }
.section-head > p { width: min(480px, 42%); margin: 0; color: var(--muted); }
.featured { min-height: 460px; display: grid; grid-template-columns: 220px 1fr 170px; color: inherit; background: var(--surface); border: 1px solid var(--border); text-decoration: none; box-shadow: 0 24px 70px color-mix(in oklch, var(--fg) 5%, transparent); transition: transform .18s ease, box-shadow .18s ease; }
.featured:hover { transform: translateY(-3px); box-shadow: 0 32px 90px color-mix(in oklch, var(--fg) 10%, transparent); }
.featured-index { display: flex; flex-direction: column; justify-content: space-between; padding: 34px; color: var(--surface); background: var(--dark); }
.featured-index span { font: 600 68px/1 var(--font-mono); letter-spacing: -.08em; }
.featured-index small { color: var(--dark-muted); font: 11px/1.5 var(--font-mono); letter-spacing: .1em; }
.featured-copy { align-self: center; padding: 54px 60px; }
.labels { display: flex; flex-wrap: wrap; gap: 8px; }
.labels span, .milestone-status > * { display: inline-flex; align-items: center; width: fit-content; min-height: 28px; padding: 3px 9px; border: 1px solid currentColor; border-radius: 999px; font: 550 11px/1.4 var(--font-mono); text-decoration: none; }
.available-label, .ready, .done { color: var(--accent-dark); background: var(--accent-bg); }
.project-label, .working { color: var(--warn); background: var(--warn-bg); }
.featured h3 { max-width: 22ch; margin: 28px 0 14px; font: 600 clamp(28px, 3vw, 42px)/1.35 var(--font-sans); }
.featured-copy > p { max-width: 64ch; margin: 0; color: var(--muted); }
.featured ul { display: flex; flex-wrap: wrap; gap: 8px; margin: 28px 0 0; padding: 0; list-style: none; }
.featured li { padding: 5px 9px; background: var(--bg); border: 1px solid var(--border); font-size: 12px; }
.featured-action { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 28px; border-left: 1px solid var(--border); font: 550 12px/1.4 var(--font-mono); }
.featured-action b { width: 70px; height: 70px; display: grid; place-items: center; color: var(--surface); background: var(--accent-dark); border-radius: 50%; font: 400 30px/1 var(--font-sans); }
.placeholder-card { min-height: 150px; display: grid; grid-template-columns: 180px 1fr 1.35fr 170px; gap: 28px; align-items: center; margin-top: 18px; padding: 26px 30px; color: inherit; background: color-mix(in oklch, var(--warn-bg) 58%, var(--surface)); border: 1px dashed var(--warn); text-decoration: none; }
.placeholder-card:hover { background: var(--warn-bg); }
.b1-card { background: var(--surface); border-style: solid; border-color: var(--border); box-shadow: inset 4px 0 var(--accent); }
.b1-card:hover { background: var(--accent-bg); border-color: var(--accent); }
.placeholder-card > div { display: grid; gap: 9px; }
.placeholder-code { color: var(--muted); font: 550 11px/1.4 var(--font-mono); letter-spacing: .08em; }
.placeholder-label { width: fit-content; padding: 3px 8px; color: var(--warn); border: 1px solid currentColor; border-radius: 999px; font: 550 11px/1.4 var(--font-mono); }
.direction-label { color: var(--accent-dark); background: var(--accent-bg); }
.placeholder-card h3 { margin: 0; font: 600 22px/1.4 var(--font-sans); }
.placeholder-card p { margin: 0; color: var(--muted); font-size: 14px; }
.placeholder-card > b { justify-self: end; font: 600 13px/1.4 var(--font-mono); }
.placeholder-card > b span { margin-left: 12px; }

.roadmap { padding-block: 120px; color: var(--surface); background: var(--dark); }
.roadmap .kicker, .dark-head > p { color: var(--dark-muted); }
.product-route { display: grid; grid-template-columns: 1fr 44px 1.08fr 44px 1fr; align-items: stretch; }
.route-card { position: relative; min-height: 390px; display: flex; flex-direction: column; padding: 30px; background: var(--dark-surface); border: 1px solid color-mix(in oklch, var(--surface) 16%, transparent); }
.route-current { background: color-mix(in oklch, var(--accent) 8%, var(--dark-surface)); border-color: var(--accent); }
.route-top { display: flex; align-items: center; justify-content: space-between; gap: 18px; color: var(--dark-muted); font: 11px/1.4 var(--font-mono); letter-spacing: .08em; }
.route-top b { font-weight: 500; }
.route-card h3 { margin: 68px 0 12px; font: 600 27px/1.42 var(--font-sans); }
.route-card > p { margin: 0; color: var(--dark-muted); }
.route-card > a { width: fit-content; margin-top: auto; padding-top: 24px; color: var(--surface); border-bottom: 1px solid currentColor; font: 600 12px/1.6 var(--font-mono); text-decoration: none; }
.route-card > a span { margin-left: 12px; }
.route-card > a:hover { color: var(--accent); }
.route-arrow { display: grid; place-items: center; color: var(--dark-muted); }
.node { position: absolute; top: 28px; left: 30px; width: 72px; height: 72px; display: grid; place-items: center; border: 1px solid var(--dark-muted); border-radius: 50%; font: 600 15px/1 var(--font-mono); }
.node.current { color: var(--dark); background: var(--accent); border-color: var(--accent); }
.route-current .route-top { min-height: 72px; padding-left: 92px; }
.route-current h3 { margin-top: 54px; }
.foundation-steps { display: grid; gap: 0; margin-top: 46px; border-top: 1px solid color-mix(in oklch, var(--surface) 16%, transparent); }
.foundation-steps > div { display: grid; grid-template-columns: 48px 1fr; gap: 14px; align-items: start; padding: 18px 0; border-bottom: 1px solid color-mix(in oklch, var(--surface) 16%, transparent); }
.foundation-steps code { color: var(--accent); font-weight: 650; }
.foundation-steps p { margin: 0; }
.foundation-steps b, .foundation-steps small { display: block; }
.foundation-steps small { margin-top: 3px; color: var(--dark-muted); font-size: 12px; }
.foundation-steps em { font-style: normal; }
.route-status { width: fit-content; margin-top: auto; padding: 6px 9px; color: var(--dark-muted); border: 1px solid currentColor; border-radius: 999px; font: 550 11px/1.4 var(--font-mono); }
.supporting-head { display: flex; align-items: end; justify-content: space-between; gap: 32px; margin-top: 80px; padding-bottom: 22px; border-bottom: 1px solid color-mix(in oklch, var(--surface) 16%, transparent); }
.supporting-head span { font: 600 18px/1.4 var(--font-sans); }
.supporting-head p { max-width: 520px; margin: 0; color: var(--dark-muted); }
.supporting-grid { display: grid; grid-template-columns: 1fr 1fr; }
.supporting-grid article { min-height: 250px; display: flex; flex-direction: column; padding: 28px 30px; border-bottom: 1px solid color-mix(in oklch, var(--surface) 16%, transparent); }
.supporting-grid article + article { border-left: 1px solid color-mix(in oklch, var(--surface) 16%, transparent); }
.supporting-grid article > span { color: var(--dark-muted); font: 11px/1.4 var(--font-mono); letter-spacing: .08em; }
.supporting-grid h3 { margin: 38px 0 8px; font: 600 22px/1.4 var(--font-sans); }
.supporting-grid p { margin: 0; color: var(--dark-muted); }
.supporting-grid b { margin-top: auto; padding-top: 20px; color: var(--surface); font: 550 11px/1.4 var(--font-mono); }

footer { min-height: 120px; display: flex; align-items: center; justify-content: space-between; gap: 30px; border-top: 1px solid var(--border); }
footer p { margin: 0; color: var(--muted); font-size: 13px; }
footer a { text-underline-offset: 3px; }

@media (max-width: 1040px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-header nav { display: none; }
  .hero { grid-template-columns: 1fr; gap: 80px; }
  .manifest { width: min(700px, 100%); }
  .business-intro-grid { grid-template-columns: 1fr; gap: 64px; }
  .business-intro-system { width: min(820px, 100%); }
  .featured { grid-template-columns: 170px 1fr; }
  .featured-action { grid-column: 1 / -1; min-height: 100px; flex-direction: row; border-top: 1px solid var(--border); border-left: 0; }
  .featured-action b { width: 48px; height: 48px; font-size: 22px; }
  .placeholder-card { grid-template-columns: 160px 1fr; }
  .placeholder-card p { grid-column: 1 / -1; }
  .placeholder-card > b { justify-self: start; }
  .audience-grid { grid-template-columns: 1fr; }
  .audience-grid article { min-height: 260px; border-right: 0; border-bottom: 1px solid var(--border); }
  .audience-grid article:last-child { border-bottom: 0; }
  .audience-grid h3 { margin-top: 34px; }
  .product-route { grid-template-columns: 1fr; gap: 12px; }
  .route-arrow { min-height: 24px; transform: rotate(90deg); }
  .route-card { min-height: 330px; }
}

@media (max-width: 720px) {
  .shell { width: calc(100% - 28px); }
  .site-header { min-height: 64px; padding-inline: 14px; }
  .brand b { display: none; }
  .doc-link { min-height: 40px; padding-inline: 10px; font-size: 12px; }
  .hero { min-height: auto; padding-block: 78px; gap: 66px; }
  .hero h1 { white-space: normal; font-size: clamp(38px, 11vw, 52px); line-height: 1.28; }
  .lead { font-size: 16px; }
  .manifest > div { min-height: 104px; padding-inline: 20px; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stats > div { min-height: 108px; padding: 20px; border-bottom: 1px solid color-mix(in oklch, var(--surface) 15%, transparent); }
  .section, .roadmap, .audiences, .business-intro { padding-block: 82px; }
  .business-intro-copy h2 { font-size: 36px; }
  .business-intro-copy > p:not(.kicker) { font-size: 16px; }
  .business-intro-status { grid-template-columns: 1fr; }
  .business-intro-status span { padding: 15px 0; }
  .business-intro-status span + span { padding-left: 0; border-top: 1px solid var(--border); border-left: 0; }
  .business-intro-system { grid-template-columns: 1fr; }
  .business-intro-system article { min-height: 280px; padding: 25px 22px; }
  .business-intro-system h3 { margin-top: 46px; }
  .intro-exchange { min-height: 88px; flex-direction: row; border-block: 1px solid var(--border); border-inline: 0; }
  .intro-exchange b { writing-mode: horizontal-tb; }
  .section-head { align-items: start; flex-direction: column; gap: 16px; margin-bottom: 32px; }
  .section-head > p { width: 100%; }
  .featured { grid-template-columns: 1fr; }
  .featured-index { min-height: 150px; padding: 26px; }
  .featured-index span { font-size: 52px; }
  .featured-copy { padding: 32px 22px; }
  .featured h3 { font-size: 29px; }
  .featured-action { grid-column: auto; }
  .placeholder-card { grid-template-columns: 1fr; padding: 24px 22px; }
  .placeholder-card p { grid-column: auto; }
  .route-card { min-height: 320px; padding: 24px 22px; }
  .route-card h3 { margin-top: 54px; font-size: 24px; }
  .node { top: 22px; left: 22px; width: 62px; height: 62px; font-size: 13px; }
  .route-current .route-top { min-height: 62px; padding-left: 76px; }
  .route-current h3 { margin-top: 48px; }
  .supporting-head { align-items: flex-start; flex-direction: column; margin-top: 62px; }
  .supporting-grid { grid-template-columns: 1fr; }
  .supporting-grid article { min-height: 260px; padding-inline: 8px; }
  .supporting-grid article + article { border-left: 0; }
  footer { align-items: flex-start; flex-direction: column; justify-content: center; padding-block: 34px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}