:root {
  --indigo: #142a45;
  --indigo-2: #203c5d;
  --amber: #d78b2c;
  --amber-soft: #f3d9ab;
  --jade: #6f927b;
  --cream: #f6f0e4;
  --paper: #fbf8f1;
  --ink: #1f2528;
  --muted: #66706f;
  --line: rgba(20, 42, 69, .16);
  --shadow: 0 24px 70px rgba(20, 42, 69, .13);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.7;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.progress { position: fixed; inset: 0 0 auto; height: 3px; z-index: 100; }
.progress span { display: block; width: 0; height: 100%; background: var(--amber); }
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 76px;
  padding: 12px clamp(24px, 4vw, 72px);
  color: white;
  background: rgba(13, 31, 51, .86);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,.12);
}
.brand { display: flex; align-items: center; gap: 11px; }
.brand-mark { display: grid; place-items: center; width: 40px; height: 40px; color: var(--indigo); background: var(--amber-soft); border-radius: 50% 44% 52% 48%; font-family: serif; font-weight: 800; }
.brand strong, .brand small { display: block; line-height: 1.2; }
.brand small { margin-top: 4px; opacity: .7; letter-spacing: .2em; font-size: 10px; }
.site-header nav { display: flex; gap: 28px; font-size: 14px; }
.site-header nav a { opacity: .78; transition: opacity .2s; }
.site-header nav a:hover { opacity: 1; }
.nav-cta { padding: 9px 18px; border: 1px solid rgba(255,255,255,.4); border-radius: 999px; font-size: 13px; }
.section-shell { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }
.hero {
  position: relative;
  width: min(1480px, 100%);
  min-height: 92vh;
  margin-top: 0;
  overflow: hidden;
  background: var(--cream);
}
.hero-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(246,240,228,.98) 0%, rgba(246,240,228,.92) 34%, rgba(246,240,228,.18) 62%, rgba(20,42,69,.08) 100%); }
.hero-copy { position: relative; z-index: 2; width: min(600px, 50%); padding: clamp(160px, 20vh, 210px) 0 90px clamp(24px, 6vw, 86px); }
.eyebrow { margin: 0 0 18px; color: var(--amber); font-size: 12px; font-weight: 800; letter-spacing: .2em; }
.hero h1 { margin: 0; color: var(--indigo); font-family: "Noto Serif SC", "Songti SC", serif; font-size: clamp(58px, 7vw, 100px); line-height: 1.05; letter-spacing: .04em; }
.hero-subtitle { max-width: 520px; margin: 28px 0 18px; color: var(--indigo); font-size: clamp(20px, 2vw, 27px); font-weight: 700; }
.hero-lead { max-width: 520px; color: #4e5959; font-size: 17px; }
.hero-actions { display: flex; gap: 12px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-width: 128px; padding: 12px 22px; border-radius: 999px; font-weight: 700; }
.button.primary { color: white; background: var(--indigo); box-shadow: 0 10px 30px rgba(20,42,69,.2); }
.button.secondary { color: var(--indigo); border: 1px solid rgba(20,42,69,.35); }
.hero-note { position: absolute; right: 24px; bottom: 20px; z-index: 2; padding: 6px 10px; color: rgba(255,255,255,.86); background: rgba(20,42,69,.48); border-radius: 3px; font-size: 10px; }
.section { padding: 110px 0; }
.section-heading { max-width: 780px; margin-bottom: 54px; }
.section-heading h2, .split-copy h2, .closing h2 { margin: 0; color: var(--indigo); font-family: "Noto Serif SC", "Songti SC", serif; font-size: clamp(36px, 4.4vw, 58px); line-height: 1.22; }
.section-heading > p:last-child { color: var(--muted); font-size: 17px; }
.intro-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 80px; align-items: start; }
.intro-statement { margin: 0; color: #394143; font-size: clamp(21px, 2.3vw, 29px); line-height: 1.65; }
.project-facts { margin: 0; border-top: 1px solid var(--line); }
.project-facts div { display: flex; justify-content: space-between; gap: 18px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.project-facts dt { color: var(--muted); }
.project-facts dd { margin: 0; color: var(--indigo); font-weight: 800; }
.paper-section { background: var(--cream); }
.problem-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 90px; }
.problem-list { border-top: 1px solid var(--line); }
.problem-item { display: grid; grid-template-columns: 62px 1fr; gap: 24px; padding: 28px 0; border-bottom: 1px solid var(--line); }
.problem-item > span { color: var(--amber); font-family: serif; font-size: 22px; }
.problem-item h3 { margin: 0 0 8px; color: var(--indigo); font-size: 20px; }
.problem-item p { margin: 0; color: var(--muted); }
.mode-switcher { display: flex; width: fit-content; margin-bottom: 30px; border-bottom: 1px solid var(--line); }
.mode-tab { padding: 12px 30px; color: var(--muted); background: none; border: 0; border-bottom: 3px solid transparent; cursor: pointer; }
.mode-tab.active { color: var(--indigo); border-color: var(--amber); font-weight: 800; }
.mode-stage { display: grid; grid-template-columns: .85fr 1.15fr; gap: 56px; align-items: center; min-height: 470px; }
.mode-copy { padding: 24px 0; }
.mode-label { color: var(--amber); font-size: 13px; font-weight: 800; letter-spacing: .15em; }
.mode-copy h3 { margin: 8px 0 20px; color: var(--indigo); font-family: "Noto Serif SC", serif; font-size: 36px; line-height: 1.3; }
.mode-copy > p:not(.mode-label) { color: var(--muted); }
.mode-copy ul { margin: 28px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.mode-copy li { padding: 12px 0; border-bottom: 1px solid var(--line); }
.mode-copy li::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 12px; background: var(--jade); border-radius: 50%; }
.mode-stage img { width: 100%; height: 470px; object-fit: cover; border-radius: 2px; box-shadow: var(--shadow); }
.indigo-section { color: white; background: var(--indigo); }
.section-heading.light h2 { color: white; }
.section-heading.light > p:last-child { color: rgba(255,255,255,.66); }
.flow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin: 0; padding: 1px; list-style: none; background: rgba(255,255,255,.16); }
.flow li { min-height: 190px; padding: 28px; background: var(--indigo); }
.flow li span { display: block; color: var(--amber-soft); font-family: serif; font-size: 15px; }
.flow li strong { display: block; margin: 24px 0 8px; font-size: 22px; }
.flow li small { color: rgba(255,255,255,.62); font-size: 14px; }
.split-section { display: grid; grid-template-columns: 1.05fr .95fr; gap: 74px; align-items: center; }
.split-section.reverse { grid-template-columns: .95fr 1.05fr; }
.split-media img { width: 100%; min-height: 520px; object-fit: cover; box-shadow: var(--shadow); }
.split-media p { margin: 10px 0 0; color: var(--muted); font-size: 11px; }
.split-copy > p:not(.eyebrow) { color: var(--muted); font-size: 17px; }
.rule-lines { margin-top: 34px; border-top: 1px solid var(--line); }
.rule-lines div { display: grid; grid-template-columns: 110px 1fr; gap: 20px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.rule-lines strong { color: var(--indigo); }
.rule-lines span { color: var(--muted); }
.tech-section { background: #edf1ec; }
.tech-boundary { margin-top: 32px; padding: 24px 28px; border-left: 4px solid var(--jade); background: rgba(255,255,255,.6); }
.tech-boundary h3 { margin: 0 0 8px; color: var(--indigo); }
.tech-boundary p { margin: 0; color: var(--muted); }
.settlement-diagram { display: grid; grid-template-columns: 1fr .55fr 1.4fr; align-items: center; gap: 18px; }
.settle-node { padding: 24px; background: white; border: 1px solid var(--line); box-shadow: 0 10px 30px rgba(20,42,69,.06); }
.settle-node.main { padding-block: 38px; color: white; background: var(--indigo); border-color: var(--indigo); }
.settle-node.accent { background: #fff7e8; border-color: var(--amber-soft); }
.settle-node span, .settle-node strong { display: block; }
.settle-node span { color: var(--muted); font-size: 13px; }
.settle-node.main span { color: rgba(255,255,255,.65); }
.settle-node strong { margin-top: 7px; font-size: 18px; }
.settle-line { position: relative; color: var(--muted); text-align: center; font-size: 12px; }
.settle-line::before { content: ""; position: absolute; left: 0; right: 0; top: 50%; height: 1px; background: var(--amber); }
.settle-line b { position: relative; padding: 4px 7px; background: var(--paper); }
.settle-branches { display: grid; gap: 14px; }
.settle-branches > div { display: grid; grid-template-columns: 24px 1fr; align-items: center; }
.settle-branches i { height: 1px; background: var(--amber); }
.compliance-note { max-width: 840px; margin: 42px auto 0; color: var(--muted); text-align: center; }
.finance-section { color: white; background: #101f31; }
.finance-layout { display: grid; grid-template-columns: 210px 1fr 1.05fr; gap: 44px; align-items: stretch; }
.year-selector { display: grid; gap: 8px; }
.year-tab { padding: 18px 20px; color: rgba(255,255,255,.58); text-align: left; background: transparent; border: 1px solid rgba(255,255,255,.13); cursor: pointer; }
.year-tab small { display: block; margin-top: 3px; font-size: 11px; }
.year-tab.active { color: var(--indigo); background: var(--amber-soft); border-color: var(--amber-soft); }
.finance-summary { display: grid; grid-template-columns: repeat(3, 1fr); align-items: end; gap: 1px; background: rgba(255,255,255,.14); }
.finance-summary > div { height: 100%; padding: 28px 22px; background: #101f31; }
.finance-summary span, .finance-summary strong, .finance-summary small { display: block; }
.finance-summary span { color: rgba(255,255,255,.58); font-size: 12px; }
.finance-summary strong { margin-top: 18px; font-family: serif; font-size: clamp(28px, 3vw, 44px); }
.finance-summary small { color: rgba(255,255,255,.5); }
.finance-summary .highlight strong { color: var(--amber-soft); }
.finance-bars { display: grid; align-content: center; gap: 18px; }
.finance-bars > div { display: grid; grid-template-columns: 96px 1fr 70px; gap: 12px; align-items: center; }
.finance-bars span, .finance-bars em { color: rgba(255,255,255,.72); font-size: 12px; font-style: normal; }
.finance-bars em { text-align: right; }
.finance-bars i { height: 8px; overflow: hidden; background: rgba(255,255,255,.12); border-radius: 10px; }
.finance-bars b { display: block; height: 100%; background: linear-gradient(90deg, var(--amber), var(--amber-soft)); border-radius: inherit; transition: width .45s ease; }
.timeline { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.timeline article { min-height: 210px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.timeline span { color: var(--amber); font-family: serif; font-size: 14px; }
.timeline h3 { margin: 28px 0 8px; color: var(--indigo); }
.timeline p { margin: 0; color: var(--muted); }
.outcomes-grid { display: grid; grid-template-columns: .7fr 1.3fr; gap: 80px; }
.outcomes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 36px 22px; }
.outcomes div { padding-top: 16px; border-top: 2px solid var(--amber); }
.outcomes strong, .outcomes span { display: block; }
.outcomes strong { color: var(--indigo); font-family: serif; font-size: 40px; }
.outcomes span { color: var(--muted); }
.risk-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.risk-grid article { padding: 24px 0; border-top: 1px solid var(--line); }
.risk-grid h3 { margin: 0 0 10px; color: var(--indigo); }
.risk-grid p { margin: 0; color: var(--muted); }
.closing { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 80px; padding: 70px; color: white; background: var(--indigo); }
.closing h2 { max-width: 780px; color: white; }
.closing p:last-child { max-width: 780px; color: rgba(255,255,255,.62); }
.closing .button.primary { color: var(--indigo); background: var(--amber-soft); flex: 0 0 auto; }
footer { display: flex; justify-content: space-between; gap: 24px; padding: 30px clamp(24px,4vw,72px); color: #8a9291; background: #0d1826; font-size: 12px; }
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .site-header nav { display: none; }
  .hero-copy { width: 62%; }
  .intro-grid, .problem-layout, .mode-stage, .split-section, .split-section.reverse, .outcomes-grid { grid-template-columns: 1fr; }
  .problem-layout, .split-section, .split-section.reverse { gap: 48px; }
  .finance-layout { grid-template-columns: 1fr; }
  .year-selector { grid-template-columns: repeat(3, 1fr); }
  .flow, .timeline, .risk-grid { grid-template-columns: repeat(2, 1fr); }
  .settlement-diagram { grid-template-columns: 1fr; }
  .settle-line { min-height: 36px; display: grid; place-items: center; }
  .settle-line::before { left: 50%; right: auto; top: 0; bottom: 0; width: 1px; height: auto; }
  .settle-branches > div { grid-template-columns: 1fr; }
  .settle-branches i { display: none; }
}

@media (max-width: 680px) {
  .section-shell { width: min(100% - 32px, 1180px); }
  .site-header { min-height: 66px; padding-inline: 16px; }
  .nav-cta { display: none; }
  .hero { min-height: 820px; width: 100%; }
  .hero-image { object-position: 67% center; }
  .hero-overlay { background: linear-gradient(180deg, rgba(246,240,228,.98) 0%, rgba(246,240,228,.94) 48%, rgba(246,240,228,.25) 72%, rgba(20,42,69,.25) 100%); }
  .hero-copy { width: 100%; padding: 130px 24px 300px; }
  .hero h1 { font-size: 54px; }
  .hero-note { left: 16px; right: auto; }
  .section { padding: 78px 0; }
  .section-heading { margin-bottom: 38px; }
  .flow, .timeline, .risk-grid, .outcomes { grid-template-columns: 1fr; }
  .mode-switcher { width: 100%; }
  .mode-tab { flex: 1; padding-inline: 10px; }
  .mode-stage img, .split-media img { min-height: 330px; height: 330px; }
  .finance-summary { grid-template-columns: 1fr; }
  .finance-summary > div { min-height: auto; }
  .year-tab { padding: 12px; }
  .year-tab small { display: none; }
  .closing { display: block; margin-bottom: 0; padding: 42px 24px; }
  .closing .button { margin-top: 20px; }
  footer { display: grid; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}