:root {
  --ink: #10231d;
  --ink-soft: #29443b;
  --forest: #0d211b;
  --green: #1f6b50;
  --mint: #8bc7a7;
  --paper: #f3f0e8;
  --paper-deep: #e8e3d7;
  --white: #fffef9;
  --gold: #d7a94b;
  --line: rgba(16, 35, 29, 0.16);
  --sans: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; left: 1rem; top: -4rem; z-index: 100; padding: .7rem 1rem; background: var(--white); border-radius: .5rem; }
.skip-link:focus { top: 1rem; }

.site-header { position: absolute; top: 0; left: 0; right: 0; z-index: 30; height: 92px; display: flex; align-items: center; gap: 2rem; padding: 0 clamp(1.25rem, 5vw, 5.5rem); color: var(--white); border-bottom: 1px solid rgba(255,255,255,.12); }
.site-header.is-scrolled { position: fixed; height: 72px; color: var(--ink); background: rgba(243,240,232,.94); border-color: var(--line); backdrop-filter: blur(18px); box-shadow: 0 8px 30px rgba(16,35,29,.08); }
.brand { display: inline-flex; align-items: center; gap: .75rem; min-width: max-content; }
.brand-mark { display: grid; place-items: center; width: 42px; height: 42px; border: 1px solid currentColor; border-radius: 50%; font-family: var(--serif); font-size: 1.45rem; }
.brand-copy { display: flex; flex-direction: column; line-height: 1.15; }
.brand-copy strong { font-family: var(--serif); font-size: 1.05rem; letter-spacing: .12em; }
.brand-copy small { margin-top: .3rem; opacity: .62; font-size: .53rem; letter-spacing: .18em; }
.site-nav { display: flex; align-items: center; justify-content: center; gap: clamp(1.25rem, 3vw, 3rem); margin-left: auto; }
.site-nav a { position: relative; font-size: .88rem; letter-spacing: .06em; opacity: .82; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -.5rem; height: 1px; background: currentColor; transition: right .25s ease; }
.site-nav a:hover::after, .site-nav a:focus-visible::after { right: 0; }
.header-cta { padding: .7rem 1.1rem; border: 1px solid currentColor; border-radius: 999px; font-size: .82rem; }
.menu-toggle { display: none; margin-left: auto; padding: .4rem; color: inherit; background: transparent; border: 0; }
.menu-toggle span:not(.sr-only) { display: block; width: 24px; height: 1px; margin: 5px 0; background: currentColor; }

.hero { position: relative; min-height: 850px; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(440px, .95fr); align-items: center; gap: 5vw; padding: 130px clamp(1.25rem, 7vw, 8rem) 80px; overflow: hidden; color: var(--white); background: var(--forest); }
.hero::before { content: ""; position: absolute; inset: 0; opacity: .14; background-image: linear-gradient(rgba(255,255,255,.18) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.18) 1px, transparent 1px); background-size: 80px 80px; mask-image: linear-gradient(90deg, #000, transparent 72%); }
.hero-glow { position: absolute; width: 720px; height: 720px; right: -280px; top: 40px; border-radius: 50%; background: radial-gradient(circle, rgba(139,199,167,.18), transparent 67%); }
.hero-copy, .hero-visual { position: relative; z-index: 2; }
.eyebrow, .section-index { margin: 0 0 1.5rem; text-transform: uppercase; font-size: .75rem; font-weight: 650; letter-spacing: .16em; }
.eyebrow { display: flex; align-items: center; gap: .7rem; color: var(--mint); }
.eyebrow span { width: 42px; height: 1px; background: currentColor; }
.hero h1 { max-width: 780px; margin: 0; font-family: var(--serif); font-size: clamp(3.4rem, 6.5vw, 7rem); font-weight: 500; line-height: 1.08; letter-spacing: -.055em; }
.hero h1 em { color: var(--mint); font-style: normal; }
.hero-lead { max-width: 650px; margin: 2rem 0 0; color: rgba(255,255,255,.68); font-size: clamp(1rem, 1.4vw, 1.2rem); line-height: 1.9; }
.hero-actions { display: flex; gap: .9rem; margin-top: 2.4rem; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 0 1.4rem; border-radius: 999px; font-weight: 650; font-size: .9rem; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: var(--forest); background: var(--mint); }
.button-ghost { color: inherit; border: 1px solid rgba(255,255,255,.28); }
.hero-facts { display: flex; gap: clamp(1.5rem, 4vw, 4rem); margin: 3.6rem 0 0; padding: 2rem 0 0; border-top: 1px solid rgba(255,255,255,.13); list-style: none; }
.hero-facts li { display: flex; flex-direction: column; }
.hero-facts strong { font-family: var(--serif); font-size: 1.35rem; font-weight: 500; }
.hero-facts span { margin-top: .25rem; color: rgba(255,255,255,.5); font-size: .75rem; }

.hero-visual { min-height: 580px; border: 1px solid rgba(255,255,255,.15); border-radius: 48% 48% 8px 8px; background: linear-gradient(155deg, rgba(255,255,255,.08), rgba(255,255,255,.015)); box-shadow: inset 0 1px 0 rgba(255,255,255,.1); }
.visual-title { position: absolute; top: 2.1rem; left: 2.2rem; display: flex; flex-direction: column; }
.visual-title span { font-family: var(--serif); font-size: 1.2rem; }
.visual-title small { color: rgba(255,255,255,.38); font-size: .58rem; letter-spacing: .2em; }
.orbit { position: absolute; left: 50%; top: 52%; border: 1px dashed rgba(139,199,167,.3); border-radius: 50%; transform: translate(-50%,-50%); }
.orbit-one { width: 54%; aspect-ratio: 1; }
.orbit-two { width: 83%; aspect-ratio: 1; }
.core-node { position: absolute; left: 50%; top: 52%; width: 122px; aspect-ratio: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; border-radius: 50%; color: var(--forest); background: var(--mint); transform: translate(-50%,-50%); box-shadow: 0 0 0 16px rgba(139,199,167,.08); }
.core-node span, .core-node small { font-size: .68rem; }
.core-node strong { font-size: 1.55rem; line-height: 1; }
.module-node { position: absolute; width: 104px; min-height: 78px; padding: .8rem 1rem; display: grid; grid-template-columns: auto 1fr; column-gap: .6rem; align-items: center; border: 1px solid rgba(255,255,255,.18); border-radius: 10px; background: rgba(13,33,27,.88); box-shadow: 0 16px 40px rgba(0,0,0,.18); }
.module-node i { grid-row: 1 / 3; color: var(--mint); font-style: normal; font-size: .62rem; }
.module-node strong { font-family: var(--serif); font-size: 1rem; }
.module-node span { color: rgba(255,255,255,.42); font-size: .62rem; }
.module-node.inventory { left: 9%; top: 38%; border-color: rgba(139,199,167,.6); }
.module-node.assets { right: 7%; top: 29%; }
.module-node.receivable { right: 3%; bottom: 21%; }
.module-node.payable { left: 17%; bottom: 12%; }
.module-node.project { left: 42%; top: 13%; }
.visual-note { position: absolute; left: 2.2rem; bottom: 1.7rem; display: flex; align-items: center; gap: .55rem; color: rgba(255,255,255,.5); font-size: .7rem; }
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 6px rgba(139,199,167,.12); }

.signal-strip { min-height: 84px; display: grid; grid-template-columns: .7fr repeat(3, 1fr); align-items: center; gap: 1rem; padding: 1rem clamp(1.25rem, 7vw, 8rem); border-bottom: 1px solid var(--line); background: var(--white); }
.signal-strip p { margin: 0; color: var(--green); font-size: .72rem; font-weight: 700; letter-spacing: .12em; }
.signal-strip div { display: flex; flex-direction: column; padding-left: 1.5rem; border-left: 1px solid var(--line); }
.signal-strip span { color: var(--ink-soft); font-size: .68rem; }
.signal-strip strong { font-size: .82rem; }

.section { padding: clamp(5.5rem, 10vw, 10rem) clamp(1.25rem, 7vw, 8rem); }
.section-heading { display: grid; grid-template-columns: 1.3fr .7fr; gap: 8vw; align-items: end; margin-bottom: clamp(3rem, 6vw, 5.5rem); }
.section-index { color: var(--green); }
.section-heading h2, .trial h2, .closing h2 { margin: 0; font-family: var(--serif); font-size: clamp(2.6rem, 5vw, 5.3rem); font-weight: 500; line-height: 1.14; letter-spacing: -.045em; }
.section-heading > p { max-width: 500px; margin: 0 0 .5rem; color: #60736c; line-height: 1.9; }

.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.product-card { min-height: 430px; display: flex; flex-direction: column; padding: 1.5rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.25); transition: background .25s ease, transform .25s ease; }
.product-card:hover { position: relative; z-index: 2; background: var(--white); transform: translateY(-5px); box-shadow: 0 20px 40px rgba(16,35,29,.08); }
.product-featured { grid-column: span 2; padding: 2rem; color: var(--white); background: var(--green); }
.product-featured:hover { background: #185b43; }
.card-top { display: flex; align-items: center; justify-content: space-between; }
.status { padding: .3rem .65rem; color: #6f7f79; border: 1px solid var(--line); border-radius: 999px; font-size: .62rem; }
.status-live { color: var(--mint); border-color: rgba(139,199,167,.45); }
.card-number { opacity: .45; font-size: .72rem; }
.card-icon { width: 48px; height: 48px; display: grid; place-items: center; margin: 2.4rem 0 1.4rem; border: 1px solid currentColor; border-radius: 50%; font-family: var(--serif); }
.product-card h3 { margin: 0 0 .8rem; font-family: var(--serif); font-size: 1.6rem; font-weight: 500; }
.product-card p { margin: 0; color: #61736c; font-size: .9rem; }
.product-featured p { max-width: 620px; color: rgba(255,255,255,.68); }
.product-card ul { display: grid; grid-template-columns: repeat(3, 1fr); gap: .7rem; margin: 1.8rem 0 0; padding: 0; list-style: none; }
.product-card li { padding-top: .8rem; border-top: 1px solid rgba(255,255,255,.18); color: rgba(255,255,255,.76); font-size: .75rem; }
.card-footer { display: flex; justify-content: space-between; align-items: end; margin-top: auto; padding-top: 1.5rem; border-top: 1px solid var(--line); }
.product-featured .card-footer { border-color: rgba(255,255,255,.2); }
.card-footer span { opacity: .55; font-size: .68rem; }
.card-footer strong { font-family: var(--serif); font-size: 1.05rem; font-weight: 500; }

.architecture { color: var(--white); background: var(--forest); }
.section-heading.light .section-index { color: var(--mint); }
.section-heading.light > p { color: rgba(255,255,255,.54); }
.architecture-flow { padding: clamp(1.5rem, 4vw, 3rem); border: 1px solid rgba(255,255,255,.14); background: rgba(255,255,255,.035); }
.flow-stage { display: grid; grid-template-columns: .6fr 1fr 1.2fr; gap: 1rem; align-items: center; padding: 1.4rem; border: 1px solid rgba(139,199,167,.35); background: rgba(139,199,167,.07); }
.flow-stage span, .flow-modules span { color: var(--mint); font-size: .65rem; letter-spacing: .12em; }
.flow-stage strong, .flow-modules strong { font-family: var(--serif); font-size: 1.15rem; }
.flow-stage small, .flow-modules small { color: rgba(255,255,255,.46); }
.flow-connector { height: 72px; display: flex; justify-content: space-around; }
.flow-connector i { width: 1px; height: 100%; background: linear-gradient(var(--mint), rgba(139,199,167,.08)); }
.flow-modules { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.flow-modules div { display: flex; flex-direction: column; gap: .25rem; padding: 1.4rem; border: 1px solid rgba(255,255,255,.14); }
.flow-link { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-top: 1rem; padding: 1rem 1.4rem; color: var(--forest); background: var(--mint); }
.flow-link span { font-size: .7rem; letter-spacing: .12em; }
.flow-link strong { font-size: .86rem; }
.principle-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 4rem; background: rgba(255,255,255,.15); }
.principle-grid div { padding: 2rem; background: var(--forest); }
.principle-grid b { color: var(--mint); font-size: .7rem; }
.principle-grid h3 { margin: 1.5rem 0 .5rem; font-family: var(--serif); font-size: 1.35rem; font-weight: 500; }
.principle-grid p { margin: 0; color: rgba(255,255,255,.48); font-size: .84rem; }

.delivery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.delivery-grid article { min-height: 480px; display: flex; flex-direction: column; padding: 2rem; border: 1px solid var(--line); background: var(--white); }
.delivery-grid article.delivery-dark { color: var(--white); background: var(--green); }
.delivery-tag { align-self: flex-start; padding: .35rem .7rem; border: 1px solid currentColor; border-radius: 999px; opacity: .68; font-size: .64rem; }
.delivery-glyph { margin: 3rem 0 2rem; color: var(--green); font-size: clamp(2.8rem, 5vw, 5rem); font-weight: 750; letter-spacing: -.08em; }
.delivery-dark .delivery-glyph { color: var(--mint); }
.delivery-grid h3 { margin: 0; font-family: var(--serif); font-size: 1.65rem; font-weight: 500; }
.delivery-grid p { color: #61736c; font-size: .88rem; }
.delivery-dark p { color: rgba(255,255,255,.65); }
.delivery-grid ul { margin: auto 0 0; padding: 1.5rem 0 0; border-top: 1px solid var(--line); list-style: none; }
.delivery-dark ul { border-color: rgba(255,255,255,.2); }
.delivery-grid li { margin-top: .5rem; font-size: .78rem; }
.delivery-grid li::before { content: "—"; margin-right: .6rem; opacity: .4; }

.trial { padding-top: 0; }
.trial-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 8vw; padding: clamp(2rem, 6vw, 5rem); border: 1px solid var(--line); background: var(--paper-deep); }
.trial-copy > p:not(.section-index) { max-width: 600px; color: #61736c; line-height: 1.9; }
.trial-status { display: flex; align-items: center; gap: .7rem; margin-top: 2rem; font-size: .82rem; }
.trial-steps { margin: 0; padding: 0; list-style: none; }
.trial-steps li { position: relative; display: flex; gap: 1.25rem; padding: 1.5rem 0; border-bottom: 1px solid var(--line); opacity: .43; }
.trial-steps li.done, .trial-steps li.active { opacity: 1; }
.trial-steps li.active::after { content: "进行中"; position: absolute; right: 0; top: 1.5rem; color: var(--green); font-size: .65rem; }
.trial-steps b { color: var(--green); font-size: .7rem; }
.trial-steps span { display: flex; flex-direction: column; }
.trial-steps strong { font-family: var(--serif); font-size: 1.2rem; font-weight: 500; }
.trial-steps small { margin-top: .3rem; color: #6c7c76; }

.closing { padding: clamp(6rem, 12vw, 12rem) 1.25rem; text-align: center; color: var(--white); background: var(--green); }
.closing p { color: var(--mint); font-size: .75rem; letter-spacing: .15em; }
.closing h2 { margin-bottom: 2.5rem; }
.closing .button-primary { background: var(--white); }
.site-footer { min-height: 170px; display: grid; grid-template-columns: 1fr 1fr 1fr; align-items: center; gap: 2rem; padding: 2rem clamp(1.25rem, 7vw, 8rem); color: rgba(255,255,255,.64); background: #081610; }
.footer-brand { color: var(--white); }
.site-footer > p { text-align: center; font-size: .78rem; }
.site-footer > div:last-child { display: flex; justify-content: flex-end; gap: 1.2rem; font-size: .7rem; }

@media (max-width: 1100px) {
  .hero { grid-template-columns: 1fr; padding-top: 150px; }
  .hero-copy { max-width: 800px; }
  .hero-visual { width: min(680px, 100%); margin: 0 auto; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .product-featured { grid-column: span 2; }
  .site-nav { gap: 1.25rem; }
}

@media (max-width: 760px) {
  .site-header { height: 72px; padding-inline: 1.1rem; }
  .header-cta { display: none; }
  .menu-toggle { display: block; }
  .site-nav { position: absolute; top: 72px; left: 0; right: 0; display: none; align-items: stretch; flex-direction: column; gap: 0; padding: 1rem 1.25rem 1.5rem; color: var(--ink); background: var(--paper); border-bottom: 1px solid var(--line); }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: .9rem 0; border-bottom: 1px solid var(--line); }
  .hero { min-height: auto; grid-template-columns: 1fr; padding: 125px 1.25rem 4rem; }
  .hero h1 { font-size: clamp(3rem, 14vw, 4.5rem); }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .hero-facts { gap: 1rem; justify-content: space-between; }
  .hero-visual { min-height: 470px; }
  .module-node { width: 92px; min-height: 68px; padding: .6rem; }
  .module-node.inventory { left: 3%; }
  .module-node.assets { right: 2%; }
  .module-node.receivable { right: 1%; }
  .module-node.payable { left: 8%; }
  .module-node.project { left: 37%; top: 16%; }
  .core-node { width: 100px; }
  .visual-note { left: 1rem; }
  .signal-strip { grid-template-columns: 1fr; padding-block: 1.5rem; }
  .signal-strip div { padding: .8rem 0 0; border-left: 0; border-top: 1px solid var(--line); }
  .section-heading, .trial-panel { grid-template-columns: 1fr; gap: 2rem; }
  .product-grid, .delivery-grid, .principle-grid { grid-template-columns: 1fr; }
  .product-featured { grid-column: auto; }
  .product-card { min-height: 380px; }
  .product-card ul { grid-template-columns: 1fr; }
  .flow-stage { grid-template-columns: 1fr; }
  .flow-modules { grid-template-columns: 1fr; }
  .flow-connector { display: none; }
  .flow-modules { margin-top: 1rem; }
  .flow-link { align-items: flex-start; flex-direction: column; }
  .delivery-grid article { min-height: 430px; }
  .site-footer { grid-template-columns: 1fr; text-align: left; }
  .site-footer > p { text-align: left; }
  .site-footer > div:last-child { justify-content: flex-start; flex-wrap: wrap; }
}

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