:root {
  --ink: #10302a;
  --ink-strong: #0b3a30;
  --muted: #44615a;
  --muted-on-green: #2f5c50;
  --ground: #f2f8f5;
  --green-pale: #e3f5ec;
  --green: #146b52;
  --line: #cfe0d9;
  --line-soft: #e1ece7;
  --purple: #5a3ea6;
  --purple-line: #7b62c2;
  --purple-pale: #eeeaf8;
  --blue: #1d6fb8;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--ground); color: var(--ink); font: 16px/1.6 var(--sans); }
a { color: var(--purple); }
a:hover { color: var(--ink-strong); }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; margin: 0; line-height: 1.3; }
.num { font-family: var(--mono); }
.wrap { max-width: 1240px; margin: 0 auto; padding-inline: 24px; }
.preview { background: var(--purple-pale); color: #3f2a80; font-size: 13px; text-align: center; padding: 8px 16px; }
.preview[hidden] { display: none; }

.site-head { background: #fff; border-bottom: 1px solid var(--line); }
.site-head .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 32px; padding-block: 14px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink-strong); text-decoration: none; font: 700 24px var(--serif); letter-spacing: 2px; }
.brand img { width: 32px; height: 32px; }
.brand { margin-right: auto; }
.site-nav { display: flex; flex-wrap: wrap; gap: 0 24px; order: 3; flex: 1 0 100%; font-size: 15px; }
@media (min-width: 760px) {
  .brand { margin-right: 0; }
  .site-nav { order: 0; flex: 1 1 320px; }
}
.site-nav a { color: var(--muted); text-decoration: none; padding: 10px 0; }
.site-nav a[aria-current="page"] { color: var(--ink-strong); font-weight: 700; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 18px; background: var(--green); color: #fff; border: 0; border-radius: 6px; font: 500 15px var(--sans); text-decoration: none; cursor: pointer; }
.btn:hover { color: #fff; opacity: .92; }
.btn-purple { background: var(--purple); }

.hero { background: var(--green-pale); color: var(--ink-strong); }
.hero .wrap { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 460px), 1fr)); gap: 40px; align-items: center; padding-block: 56px; }
.hero-spec, .hero-note { color: var(--muted-on-green); font-size: 15px; margin: 0; }
.hero h1 { font-size: clamp(28px, 3vw, 36px); margin-top: 4px; }
.spot { font: 500 clamp(92px, 13vw, 168px)/1.1 var(--mono); margin: 8px 0; }
.forward-card { background: var(--purple); color: #fff; border-radius: 8px; padding: 24px; }
.forward-card a { color: #fff; font-size: 14px; }
.forward-card-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-bottom: 8px; }
.forward-card h2 { font-size: 22px; }
.forward-row { display: grid; grid-template-columns: 92px 1fr auto; gap: 12px; align-items: center; padding-block: 8px; border-top: 1px solid var(--purple-line); }
.forward-row .num:nth-child(2) { font-size: 28px; line-height: 1.2; }
.forward-row .num:nth-child(3) { font-size: 13px; }
.forward-card p { margin: 8px 0 0; font-size: 13px; }

main { padding-block: 48px 64px; display: flex; flex-direction: column; gap: 56px; }
.panel { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 24px; }
.panel h2 { font-size: 24px; }
.sub { color: var(--muted); font-size: 14px; margin: 4px 0 16px; }
.split { display: flex; flex-wrap: wrap; gap: 32px; }
.split > :first-child { flex: 999 1 560px; min-width: 0; }
.split > :last-child { flex: 1 1 300px; min-width: 0; }
#chart { width: 100%; height: auto; display: block; touch-action: pan-y; outline-offset: 4px; font-family: var(--mono); }
.legend { display: flex; flex-wrap: wrap; gap: 8px 20px; font-size: 13px; margin-top: 8px; }
.legend .a { color: var(--green); } .legend .b { color: var(--purple); } .legend .c { color: var(--blue); }
.legend [hidden], .basis-note[hidden] { display: none; }
.basis-note { margin: 10px 0 0; font-size: 12px; line-height: 1.55; color: var(--muted); }

.calc { display: flex; flex-direction: column; gap: 16px; }
.calc label { display: flex; flex-direction: column; gap: 4px; font-size: 14px; color: var(--muted); }
select, input { min-height: 44px; padding: 0 10px; border: 1px solid #7e9c93; border-radius: 6px; font: 16px var(--sans); color: var(--ink); background: #fff; }
.calc dl { margin: 0; display: grid; grid-template-columns: 1fr auto; gap: 8px 16px; font-size: 15px; }
.calc dt { color: var(--muted); } .calc dd { margin: 0; font-family: var(--mono); }
.landed { border-top: 1px solid var(--line); padding-top: 16px; font-size: 14px; color: var(--muted); }
.landed strong { display: block; font: 500 48px/1.2 var(--mono); color: var(--green); }
.calc p { margin: 0; color: var(--muted); font-size: 13px; }

.section-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 8px 24px; margin-bottom: 16px; }
.section-head h2 { font-size: 28px; }
.section-head p { margin: 0; color: var(--muted); font-size: 15px; }
.table-box { overflow-x: auto; background: #fff; border: 1px solid var(--line); border-radius: 8px; }
table { width: 100%; min-width: 600px; border-collapse: collapse; font-size: 15px; }
th { padding: 14px 20px; color: var(--muted); font-size: 13px; font-weight: 500; text-align: left; }
td { padding: 14px 20px; border-top: 1px solid var(--line-soft); font-family: var(--mono), var(--sans); }
.right { text-align: right; } .pred { color: var(--purple); font-weight: 600; } .quiet { color: var(--muted); }

.subscribe { background: var(--purple-pale); border-radius: 8px; padding: 32px; display: flex; flex-wrap: wrap; gap: 24px; align-items: end; justify-content: space-between; }
.subscribe > div { flex: 1 1 320px; }
.subscribe h2 { font-size: 24px; } .subscribe p { margin: 4px 0 0; color: #3d3560; }
.subscribe form { flex: 1 1 360px; display: flex; flex-wrap: wrap; gap: 8px; align-items: end; }
.subscribe label { flex: 1 1 220px; display: flex; flex-direction: column; gap: 4px; font-size: 14px; }
.form-status { flex-basis: 100%; margin: 0; font-size: 14px; }

.page-title { padding-top: 48px; }
.eyebrow { margin: 0 0 8px; color: var(--purple); font-size: 15px; font-weight: 500; }
.page-title h1 { font-size: clamp(32px, 4vw, 48px); margin-bottom: 12px; }
.lead { margin: 0; color: var(--muted); max-width: 760px; font-size: 17px; }
.fwd-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); gap: 24px; }
.fwd { background: var(--purple); color: #fff; border-radius: 8px; padding: 28px; }
.fwd-top, .fwd-bot { display: flex; justify-content: space-between; gap: 16px; font-size: 15px; }
.fwd-bot { font-size: 14px; }
.fwd-price { font: 500 68px/1.2 var(--mono); margin: 12px 0; }
.fwd-bar { height: 10px; border-radius: 5px; background: #cdbff2; position: relative; margin: 16px 0 8px; }
.fwd-bar i { position: absolute; top: -4px; width: 4px; height: 18px; background: #2d1f5e; border-radius: 2px; }
.start-panel { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 32px; align-items: baseline; }
.start-panel span { font-size: 14px; color: var(--muted); }
.start-panel strong { display: block; font: 500 44px/1.3 var(--mono); color: var(--green); }
.start-panel p { margin: 0; flex: 1 1 320px; color: var(--muted); }

.doc { max-width: 860px; }
.doc section h2 { font-size: 26px; margin-bottom: 12px; }
.doc p { margin: 0; color: var(--muted); }
.doc p + p, .doc h3 + p, .doc h3 + ul, .doc ul + h3, .doc dl + h3, .doc h3 + dl, .doc p + h3 { margin-top: 12px; }
.doc h3 { font-size: 20px; color: var(--ink-strong); margin-top: 24px; }
.doc ul { margin: 0; padding-left: 20px; color: var(--muted); display: grid; gap: 10px; }
.doc li strong { color: var(--ink-strong); }
.lang { margin-left: auto; font-weight: 500; }
.spec { margin: 0; display: grid; grid-template-columns: minmax(100px, 160px) minmax(0, 1fr); border-top: 1px solid var(--line); }
.spec dt, .spec dd { margin: 0; padding: 12px 0; border-bottom: 1px solid var(--line); }
.spec dt { color: var(--muted); }
pre { margin: 12px 0; padding: 18px 20px; background: var(--purple); color: #fff; border-radius: 8px; font: 15px/1.7 var(--mono); overflow-x: auto; }

.site-foot { background: var(--purple); color: #fff; font-size: 14px; }
.site-foot .wrap { display: flex; flex-wrap: wrap; gap: 12px 32px; justify-content: space-between; padding-block: 32px; }
.site-foot a { color: #fff; text-decoration: none; border-bottom: 1px solid rgba(255,255,255,.45); padding-bottom: 1px; }
.site-foot a:hover { color: #fff; border-bottom-color: #fff; }

.notice { padding: 20px; background: #fff; border: 1px solid var(--line); border-radius: 8px; color: var(--muted); }

.mini-head { font-size: 19px; color: var(--ink-strong); margin: 0 0 10px; }
#backcheck + .mini-head { margin-top: 28px; }
#backcheck[hidden] { display: none; }
.table-sum { margin: 8px 0 0; font-size: 13px; font-weight: 600; color: var(--ink-strong); }