:root {
    --navy: #1B3A5C;
    --navy-deep: #0F2440;
    --navy-light: #2C5380;
    --gold: #C5963A;
    --gold-light: #DDB35F;
    --paper: #FAF8F3;
    --paper-warm: #F4EFE3;
    --ink: #1A1A1A;
    --ink-soft: #4A4A4A;
    --line: #D9D2C2;
    --line-strong: #8A7E63;
    --green: #1F6E3A;
    --red: #A14040;
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }

  body {
    font-family: 'Noto Sans JP', sans-serif;
    background: var(--paper);
    color: var(--ink);
    line-height: 1.9;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
  }

  .container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 32px;
  }

  /* ===== Hero ===== */
  .hero {
    background: var(--navy);
    color: var(--paper);
    padding: 96px 0 80px;
    position: relative;
    overflow: hidden;
    border-bottom: 4px solid var(--gold);
  }

  .hero::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image:
      radial-gradient(circle at 20% 30%, rgba(197, 150, 58, 0.08), transparent 50%),
      radial-gradient(circle at 80% 70%, rgba(197, 150, 58, 0.06), transparent 50%);
    pointer-events: none;
  }

  .hero .container { position: relative; z-index: 1; }

  .hero-eyebrow {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.3em;
    color: var(--gold-light);
    text-transform: uppercase;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
  }

  .hero-eyebrow::before {
    content: "";
    width: 40px;
    height: 1px;
    background: var(--gold);
  }

  .hero h1 {
    font-family: 'Noto Serif JP', serif;
    font-size: 56px;
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 24px;
    letter-spacing: -0.01em;
  }

  .hero h1 .accent {
    color: var(--gold-light);
    font-style: italic;
  }

  .hero-sub {
    font-size: 19px;
    line-height: 1.9;
    max-width: 720px;
    color: rgba(250, 248, 243, 0.9);
    font-weight: 300;
  }

  .hero-meta {
    margin-top: 48px;
    display: flex;
    gap: 48px;
    flex-wrap: wrap;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    color: rgba(250, 248, 243, 0.6);
  }

  .hero-meta span strong {
    color: var(--gold-light);
    font-weight: 500;
    margin-right: 8px;
  }

  /* ===== TL;DR Summary ===== */
  .tldr {
    background: white;
    border: 2px solid var(--gold);
    padding: 40px;
    margin: 56px 0 32px;
    position: relative;
  }

  .tldr::before {
    content: "― 3 行 で わ か る Jetson ―";
    position: absolute;
    top: -14px;
    left: 32px;
    background: var(--paper);
    padding: 0 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.25em;
    color: var(--gold);
    font-weight: 500;
  }

  .tldr-line {
    display: grid;
    grid-template-columns: 60px 1fr;
    gap: 24px;
    padding: 16px 0;
    border-bottom: 1px dashed var(--line);
    align-items: start;
  }

  .tldr-line:last-child { border-bottom: none; }

  .tldr-line .num {
    font-family: 'Noto Serif JP', serif;
    font-size: 36px;
    color: var(--gold);
    font-weight: 700;
    line-height: 1;
  }

  .tldr-line .txt {
    font-size: 18px;
    line-height: 1.7;
    color: var(--navy-deep);
    padding-top: 4px;
  }

  .tldr-line .txt strong {
    color: var(--gold);
    background: linear-gradient(transparent 60%, rgba(197, 150, 58, 0.2) 60%);
    padding: 0 2px;
  }

  /* ===== Section ===== */
  section {
    padding: 80px 0;
    border-bottom: 1px solid var(--line);
  }

  section:last-of-type { border-bottom: none; }

  .section-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    color: var(--gold);
    letter-spacing: 0.2em;
    margin-bottom: 16px;
    font-weight: 500;
  }

  h2 {
    font-family: 'Noto Serif JP', serif;
    font-size: 38px;
    font-weight: 700;
    color: var(--navy-deep);
    line-height: 1.35;
    margin-bottom: 16px;
    letter-spacing: -0.01em;
  }

  .section-lead {
    font-size: 17px;
    color: var(--ink-soft);
    max-width: 780px;
    margin-bottom: 48px;
    line-height: 1.9;
  }

  h3 {
    font-family: 'Noto Serif JP', serif;
    font-size: 22px;
    font-weight: 600;
    color: var(--navy);
    margin: 40px 0 16px;
    line-height: 1.5;
  }

  p { margin-bottom: 18px; font-size: 16px; }
  strong { font-weight: 700; color: var(--navy-deep); }

  /* ===== 概要ボックス（新Section 1） ===== */
  .overview {
    background: white;
    border: 1px solid var(--line);
    padding: 40px;
    margin: 32px 0;
  }

  .overview-row {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 32px;
    padding: 20px 0;
    border-bottom: 1px solid var(--line);
    align-items: start;
  }

  .overview-row:last-child { border-bottom: none; }

  .overview-row .ov-key {
    font-family: 'Noto Serif JP', serif;
    font-weight: 700;
    color: var(--navy-deep);
    font-size: 16px;
  }

  .overview-row .ov-key .sub {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--gold);
    letter-spacing: 0.1em;
    margin-top: 4px;
    font-weight: 400;
  }

  .overview-row .ov-val {
    font-size: 15px;
    line-height: 1.85;
    color: var(--ink-soft);
  }

  .overview-row .ov-val strong {
    color: var(--navy-deep);
  }

  /* ===== Plain Compare ===== */
  .plain-compare {
    background: white;
    border: 1px solid var(--line);
    padding: 36px;
    margin: 32px 0;
  }

  .plain-compare h4 {
    font-family: 'Noto Serif JP', serif;
    font-size: 20px;
    color: var(--navy-deep);
    margin-bottom: 24px;
    text-align: center;
  }

  .plain-row {
    display: grid;
    grid-template-columns: 140px 1fr 1fr;
    gap: 20px;
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
    align-items: center;
  }

  .plain-row:last-child { border-bottom: none; }

  .plain-row.header {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.15em;
    color: var(--ink-soft);
    padding-bottom: 12px;
    border-bottom: 2px solid var(--navy);
  }

  .plain-row .axis {
    font-weight: 600;
    color: var(--navy);
    font-size: 14px;
  }

  .plain-row .pc-col {
    font-size: 14px;
    color: var(--ink-soft);
  }

  .plain-row .jetson-col {
    font-size: 14px;
    color: var(--navy-deep);
    font-weight: 500;
  }

  /* ===== SVG実物ビジュアル ===== */
  .physical-hierarchy {
    margin: 48px 0;
  }

  .stage {
    background: white;
    border: 1px solid var(--line);
    padding: 40px;
    margin-bottom: 32px;
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 48px;
    align-items: center;
  }

  .stage:nth-child(odd) {
    grid-template-columns: 1fr 360px;
  }

  .stage:nth-child(odd) .stage-visual { order: 2; }
  .stage:nth-child(odd) .stage-text { order: 1; }

  .stage-visual {
    background: var(--paper-warm);
    border-radius: 4px;
    padding: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 280px;
    position: relative;
  }

  .stage-visual svg { max-width: 100%; height: auto; }

  .stage-label {
    position: absolute;
    top: 12px;
    left: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.2em;
    color: var(--gold);
    font-weight: 500;
  }

  .stage-text .step {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.2em;
    color: var(--gold);
    margin-bottom: 8px;
  }

  .stage-text h4 {
    font-family: 'Noto Serif JP', serif;
    font-size: 24px;
    font-weight: 700;
    color: var(--navy-deep);
    margin-bottom: 16px;
    line-height: 1.4;
  }

  .stage-text .analogy {
    background: var(--paper-warm);
    border-left: 3px solid var(--gold);
    padding: 12px 16px;
    margin-bottom: 16px;
    font-size: 14px;
    color: var(--navy);
    font-style: italic;
  }

  .stage-text .analogy strong {
    color: var(--gold);
    font-style: normal;
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.15em;
    margin-bottom: 4px;
    font-weight: 500;
  }

  .stage-text p {
    font-size: 15px;
    color: var(--ink-soft);
    line-height: 1.85;
    margin-bottom: 12px;
  }

  .stage-text .meta {
    display: flex;
    gap: 24px;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
    flex-wrap: wrap;
  }

  .stage-text .meta div {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--navy);
  }

  .stage-text .meta strong {
    color: var(--gold);
    margin-right: 6px;
  }

  /* ===== Nsight提供（シンプル版） ===== */
  .nsight-note {
    background: var(--navy);
    color: var(--paper);
    padding: 36px 40px;
    margin: 48px 0;
    border-left: 4px solid var(--gold);
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 32px;
    align-items: center;
  }

  .nsight-note .nlabel {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.25em;
    color: var(--gold-light);
    text-align: center;
    padding-right: 24px;
    border-right: 1px solid rgba(221, 179, 95, 0.4);
  }

  .nsight-note .nlabel .brand {
    display: block;
    font-family: 'Noto Serif JP', serif;
    font-size: 22px;
    font-weight: 700;
    color: var(--gold-light);
    letter-spacing: 0.05em;
    margin-top: 8px;
  }

  .nsight-note .nbody {
    font-size: 16px;
    line-height: 1.85;
    color: rgba(250, 248, 243, 0.95);
  }

  .nsight-note .nbody strong {
    color: var(--gold-light);
    font-weight: 700;
  }

  /* ===== フィット判定 ===== */
  .fit-matrix {
    margin: 40px 0;
  }

  .fit-row {
    background: white;
    border: 1px solid var(--line);
    padding: 28px 32px;
    margin-bottom: 12px;
    display: grid;
    grid-template-columns: 280px 1fr 140px;
    gap: 32px;
    align-items: center;
  }

  .fit-row.optimal { border-left: 4px solid var(--green); }
  .fit-row.overspec { border-left: 4px solid var(--red); }
  .fit-row.moderate { border-left: 4px solid var(--gold); }

  .fit-row .usecase-name {
    font-family: 'Noto Serif JP', serif;
    font-weight: 600;
    color: var(--navy-deep);
    font-size: 17px;
    line-height: 1.5;
  }

  .fit-row .usecase-name .sub {
    display: block;
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 12px;
    color: var(--ink-soft);
    font-weight: 400;
    margin-top: 4px;
  }

  .fit-row .reason {
    font-size: 14px;
    color: var(--ink-soft);
    line-height: 1.75;
  }

  .fit-row .verdict-tag {
    text-align: right;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.1em;
    font-weight: 600;
  }

  .verdict-tag.opt { color: var(--green); }
  .verdict-tag.ov { color: var(--red); }
  .verdict-tag.mod { color: var(--gold); }

  /* ===== 簡単判定 ===== */
  .simple-judge {
    background: white;
    border: 2px solid var(--navy);
    padding: 36px 40px;
    margin: 32px 0;
  }

  .simple-judge .sj-title {
    font-family: 'Noto Serif JP', serif;
    font-size: 20px;
    color: var(--navy-deep);
    margin-bottom: 20px;
    text-align: center;
    font-weight: 700;
  }

  .sj-q {
    display: grid;
    grid-template-columns: 1fr 80px 1fr;
    gap: 16px;
    align-items: center;
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
  }

  .sj-q:last-child { border-bottom: none; }

  .sj-q .question {
    font-size: 15px;
    color: var(--navy-deep);
    line-height: 1.6;
    font-weight: 500;
  }

  .sj-q .arrow {
    text-align: center;
    color: var(--gold);
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
  }

  .sj-q .answer {
    font-size: 14px;
    line-height: 1.6;
  }

  .sj-q .answer.yes {
    color: var(--green);
    font-weight: 700;
  }

  .sj-q .answer.no {
    color: var(--red);
    font-weight: 700;
  }

  /* ===== Diff Comparison ===== */
  .diff {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin: 32px 0;
  }

  .diff-card {
    padding: 28px;
    border: 1px solid var(--line);
    background: white;
  }

  .diff-card.left { border-top: 3px solid var(--ink-soft); }
  .diff-card.right { border-top: 3px solid var(--gold); }

  .diff-card h4 {
    font-family: 'Noto Serif JP', serif;
    font-size: 18px;
    color: var(--navy-deep);
    margin-bottom: 16px;
  }

  .diff-card .tag {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.15em;
    padding: 3px 10px;
    background: var(--paper-warm);
    color: var(--ink-soft);
    margin-bottom: 16px;
  }

  .diff-card ul { list-style: none; }
  .diff-card li {
    font-size: 15px;
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
    border-bottom: 1px dashed var(--line);
  }
  .diff-card li:last-child { border-bottom: none; }
  .diff-card li::before {
    content: "—";
    position: absolute;
    left: 0;
    color: var(--gold);
    font-weight: 700;
  }

  /* ===== Reason Stack ===== */
  .reason-stack {
    counter-reset: reason;
    margin: 32px 0;
  }

  .reason-item {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 24px;
    padding: 28px 0;
    border-bottom: 1px solid var(--line);
    counter-increment: reason;
  }

  .reason-item:last-child { border-bottom: none; }

  .reason-item::before {
    content: counter(reason, decimal-leading-zero);
    font-family: 'JetBrains Mono', monospace;
    font-size: 32px;
    color: var(--gold);
    font-weight: 500;
    line-height: 1;
  }

  .reason-item h4 {
    font-family: 'Noto Serif JP', serif;
    font-size: 20px;
    font-weight: 600;
    color: var(--navy-deep);
    margin-bottom: 8px;
  }

  .reason-item p {
    margin: 0 0 8px;
    color: var(--ink-soft);
    font-size: 15px;
  }

  .reason-item .example {
    background: var(--paper-warm);
    padding: 10px 14px;
    margin-top: 8px;
    font-size: 13px;
    color: var(--navy);
    border-left: 2px solid var(--gold);
  }

  .reason-item .example strong {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.15em;
    color: var(--gold);
    margin-right: 8px;
  }

  /* ===== Lineup Cards ===== */
  .lineup {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin: 40px 0;
  }

  .product-card {
    background: white;
    border: 1px solid var(--line);
    padding: 32px;
    position: relative;
    transition: all 0.3s ease;
  }

  .product-card:hover {
    border-color: var(--gold);
    box-shadow: 0 8px 24px rgba(27, 58, 92, 0.08);
  }

  .product-card .rank {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--navy);
    color: var(--gold-light);
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.15em;
    padding: 6px 14px;
  }

  .product-card .pname {
    font-family: 'Noto Serif JP', serif;
    font-size: 24px;
    font-weight: 700;
    color: var(--navy-deep);
    margin-bottom: 6px;
    margin-top: 8px;
  }

  .product-card .ptag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--gold);
    margin-bottom: 20px;
    letter-spacing: 0.05em;
  }

  .product-card .simple-line {
    background: var(--paper-warm);
    padding: 10px 14px;
    margin: 12px 0;
    font-size: 14px;
    color: var(--navy);
    border-left: 2px solid var(--gold);
    line-height: 1.6;
  }

  .product-card .simple-line strong {
    color: var(--gold);
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.15em;
    margin-right: 8px;
    display: block;
    margin-bottom: 4px;
  }

  .spec-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin: 20px 0;
    padding: 16px 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .spec-grid .spec-key {
    font-size: 11px;
    color: var(--ink-soft);
    letter-spacing: 0.08em;
    font-family: 'JetBrains Mono', monospace;
    margin-bottom: 2px;
  }

  .spec-grid .spec-val {
    font-size: 15px;
    font-weight: 600;
    color: var(--navy-deep);
  }

  .product-card .desc {
    font-size: 14px;
    color: var(--ink-soft);
    line-height: 1.8;
    margin-top: 16px;
  }

  .product-card .price {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    color: var(--navy);
  }

  .product-card .price strong {
    color: var(--gold);
    font-size: 18px;
    font-weight: 700;
  }

  /* ===== Comparison Table ===== */
  .table-wrap {
    overflow-x: auto;
    margin: 32px 0;
    border: 1px solid var(--line);
  }

  table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    font-size: 14px;
  }

  thead {
    background: var(--navy);
    color: var(--paper);
  }

  th {
    padding: 16px 14px;
    text-align: left;
    font-weight: 600;
    font-size: 13px;
    letter-spacing: 0.04em;
    border-right: 1px solid rgba(255,255,255,0.1);
  }

  th:last-child { border-right: none; }

  td {
    padding: 14px;
    border-bottom: 1px solid var(--line);
    border-right: 1px solid var(--line);
    vertical-align: top;
  }

  td:last-child { border-right: none; }

  tbody tr:nth-child(even) { background: var(--paper-warm); }

  td.product-name {
    font-family: 'Noto Serif JP', serif;
    font-weight: 700;
    color: var(--navy-deep);
    font-size: 15px;
  }

  td.tops {
    font-family: 'JetBrains Mono', monospace;
    color: var(--gold);
    font-weight: 700;
  }

  /* ===== Use Case Grid ===== */
  .usecase {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 32px 0;
  }

  .usecase-item {
    background: white;
    border: 1px solid var(--line);
    padding: 24px;
    border-top: 3px solid var(--navy);
  }

  .usecase-item h5 {
    font-family: 'Noto Serif JP', serif;
    font-size: 17px;
    color: var(--navy-deep);
    margin-bottom: 10px;
    font-weight: 600;
  }

  .usecase-item p {
    font-size: 13px;
    color: var(--ink-soft);
    line-height: 1.75;
    margin: 0;
  }

  /* ===== Software Stack ===== */
  .stack-diagram {
    background: white;
    border: 1px solid var(--line);
    margin: 32px 0;
    overflow: hidden;
  }

  .stack-layer {
    padding: 20px 28px;
    border-bottom: 1px solid var(--line);
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 32px;
    align-items: center;
  }

  .stack-layer:last-child { border-bottom: none; }

  .stack-layer .layer-name {
    font-family: 'Noto Serif JP', serif;
    font-weight: 700;
    color: var(--navy-deep);
    font-size: 16px;
  }

  .stack-layer .layer-name .sub {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--gold);
    margin-top: 4px;
    font-weight: 400;
    letter-spacing: 0.08em;
  }

  .stack-layer .layer-desc {
    font-size: 14px;
    color: var(--ink-soft);
    line-height: 1.7;
  }

  .stack-layer:nth-child(1) { background: var(--navy); color: var(--paper); }
  .stack-layer:nth-child(1) .layer-name { color: var(--paper); }
  .stack-layer:nth-child(1) .layer-name .sub { color: var(--gold-light); }
  .stack-layer:nth-child(1) .layer-desc { color: rgba(250, 248, 243, 0.8); }

  .stack-layer:nth-child(2) { background: var(--navy-light); color: var(--paper); }
  .stack-layer:nth-child(2) .layer-name { color: var(--paper); }
  .stack-layer:nth-child(2) .layer-name .sub { color: var(--gold-light); }
  .stack-layer:nth-child(2) .layer-desc { color: rgba(250, 248, 243, 0.85); }

  /* ===== Sources ===== */
  .sources {
    background: var(--paper-warm);
    padding: 40px;
    margin-top: 48px;
    border-top: 3px solid var(--navy);
  }

  .sources h3 {
    margin-top: 0;
    font-size: 17px;
    color: var(--navy-deep);
    margin-bottom: 16px;
  }

  .sources ol {
    list-style: none;
    counter-reset: src;
  }

  .sources li {
    counter-increment: src;
    padding: 6px 0 6px 32px;
    position: relative;
    font-size: 13px;
    color: var(--ink-soft);
    line-height: 1.7;
    word-break: break-all;
  }

  .sources li::before {
    content: "[" counter(src) "]";
    position: absolute;
    left: 0;
    color: var(--gold);
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
  }

  .sources a {
    color: var(--navy);
    text-decoration: none;
    border-bottom: 1px solid var(--gold);
  }

  .sources a:hover { color: var(--gold); }

  .src-ref {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    color: var(--gold);
    margin-left: 4px;
    font-weight: 500;
    vertical-align: super;
  }

  /* ===== Footer ===== */
  footer {
    background: var(--navy-deep);
    color: var(--paper);
    padding: 40px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px;
  }

  footer .brand {
    font-family: 'Noto Serif JP', serif;
    font-size: 18px;
    font-weight: 700;
    color: var(--gold-light);
    letter-spacing: 0.05em;
  }

  footer .copy {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: rgba(250, 248, 243, 0.5);
    letter-spacing: 0.08em;
  }

  footer .ft-area {
    font-size: 12px;
    color: rgba(250, 248, 243, 0.5);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 4px 12px;
    margin-top: 4px;
  }
  footer .ft-area span {
    color: rgba(250, 248, 243, 0.5);
  }
  footer .ft-area a {
    color: rgba(250, 248, 243, 0.5);
    text-decoration: none;
    transition: color .2s;
  }
  footer .ft-area a:hover {
    color: var(--gold-light);
  }

  /* ===== Note ===== */
  .note {
    background: var(--paper-warm);
    border-left: 3px solid var(--navy-light);
    padding: 16px 20px;
    font-size: 14px;
    color: var(--ink-soft);
    line-height: 1.75;
    margin: 24px 0;
  }

  .note .note-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--navy);
    letter-spacing: 0.15em;
    font-weight: 500;
    margin-bottom: 6px;
    display: block;
  }

  /* ===== 用語集 ===== */
  .glossary {
    background: white;
    border: 1px solid var(--line);
    padding: 28px 32px;
    margin: 32px 0;
  }

  .glossary-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.2em;
    color: var(--gold);
    margin-bottom: 16px;
    font-weight: 500;
  }

  .glossary-item {
    padding: 12px 0;
    border-bottom: 1px dashed var(--line);
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 24px;
  }

  .glossary-item:last-child { border-bottom: none; }

  .glossary-item .term-name {
    font-family: 'Noto Serif JP', serif;
    font-weight: 700;
    color: var(--navy-deep);
    font-size: 15px;
  }

  .glossary-item .term-def {
    font-size: 14px;
    color: var(--ink-soft);
    line-height: 1.75;
  }

  /* ===== TOC ===== */
  .toc {
    background: white;
    border: 1px solid var(--line);
    padding: 28px 32px;
    margin: 40px 0;
  }

  .toc-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.2em;
    color: var(--gold);
    margin-bottom: 16px;
    font-weight: 500;
  }

  .toc ol {
    list-style: none;
    counter-reset: toc;
    columns: 2;
    column-gap: 40px;
  }

  .toc li {
    counter-increment: toc;
    padding: 8px 0;
    font-size: 14px;
    break-inside: avoid;
  }

  .toc li::before {
    content: counter(toc, decimal-leading-zero);
    font-family: 'JetBrains Mono', monospace;
    color: var(--gold);
    margin-right: 12px;
    font-weight: 500;
  }

  .toc a {
    color: var(--navy-deep);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
  }

  .toc a:hover { border-bottom-color: var(--gold); }

  /* ===== セクション内のサブ見出し（技術詳細セクション用） ===== */
  .tech-banner {
    background: var(--paper-warm);
    border: 1px solid var(--line);
    padding: 20px 28px;
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 20px;
  }

  .tech-banner .tb-icon {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.2em;
    color: var(--gold);
    padding: 6px 14px;
    border: 1px solid var(--gold);
    flex-shrink: 0;
    font-weight: 500;
  }

  .tech-banner .tb-text {
    font-size: 14px;
    color: var(--ink-soft);
    line-height: 1.7;
  }

  /* ===== Responsive ===== */
  @media (max-width: 768px) {
    .container { padding: 0 20px; }
    .hero { padding: 64px 0 56px; }
    .hero h1 { font-size: 36px; }
    h2 { font-size: 28px; }
    .lineup, .diff, .usecase { grid-template-columns: 1fr; }
    .stage, .stage:nth-child(odd) { grid-template-columns: 1fr; gap: 24px; }
    .stage:nth-child(odd) .stage-visual { order: 1; }
    .stage:nth-child(odd) .stage-text { order: 2; }
    .stack-layer, .fit-row, .overview-row { grid-template-columns: 1fr; gap: 12px; }
    .fit-row .verdict-tag { text-align: left; }
    .plain-row { grid-template-columns: 1fr; gap: 8px; padding: 12px 0; }
    .plain-row.header { display: none; }
    .nsight-note { grid-template-columns: 1fr; gap: 16px; padding: 28px; }
    .nsight-note .nlabel { border-right: none; border-bottom: 1px solid rgba(221, 179, 95, 0.4); padding-right: 0; padding-bottom: 12px; }
    .toc ol { columns: 1; }
    .reason-item { grid-template-columns: 60px 1fr; gap: 16px; }
    .glossary-item { grid-template-columns: 1fr; gap: 4px; }
    .sj-q { grid-template-columns: 1fr; gap: 8px; text-align: left; }
    .sj-q .arrow { text-align: left; }
    .tldr { padding: 28px; }
    .tldr-line { grid-template-columns: 40px 1fr; gap: 12px; }
    .tldr-line .num { font-size: 28px; }
    .tldr-line .txt { font-size: 16px; }
    .tech-banner { flex-direction: column; align-items: flex-start; }
  }

/* ===== Global Nav (blog) ===== */
.blognav { position: sticky; top: 0; z-index: 1000; background: var(--navy-deep); border-bottom: 1px solid rgba(255,255,255,.08); }
.blognav-inner { max-width: 1100px; margin: 0 auto; padding: 14px 24px; display: flex; align-items: center; justify-content: space-between; }
.blognav-logo { font-family: 'Noto Serif JP', serif; font-weight: 700; font-size: 18px; color: var(--paper); text-decoration: none; letter-spacing: .08em; }
.blognav-logo span { color: var(--gold-light); }
.blognav-links { display: flex; gap: 26px; list-style: none; margin: 0; padding: 0; }
.blognav-links a { color: rgba(250,248,243,.82); text-decoration: none; font-size: 13px; letter-spacing: .04em; transition: color .2s; }
.blognav-links a:hover { color: var(--gold-light); }
.blognav-cta { background: var(--gold); color: var(--navy-deep) !important; padding: 8px 18px; border-radius: 30px; font-weight: 700; }
.blognav-burger { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
.blognav-burger span { width: 24px; height: 2px; background: var(--paper); transition: .3s; }
@media (max-width: 860px) {
  .blognav-links { display: none; position: fixed; top: 56px; left: 0; right: 0; background: var(--navy-deep); flex-direction: column; padding: 20px 24px; gap: 16px; z-index: 999; }
  .blognav-links.open { display: flex; }
  .blognav-burger { display: flex; }
}