/*
 * Eden Design Lab — Shared Case Study Styles
 * 共用於所有 Case Study 頁面；各案例專屬元件集中於對應註解區。
 */

:root {
      --ink: #0e1218;
      --muted: #7d838c;
      --line: #d7dadd;
      --paper: #eef2f6;
      --white: #fff;
      --green: var(--secondary-color);
      --green-dark: #0e1218;
      --green-soft: #e4ebe7;
      --lime: #f9d442;
      --blue: #9981c2;
      --orange: #ff99c0;
      --radius: 24px;
      --shadow: 0 24px 70px rgba(14, 18, 24, .12);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: "Clash Grotesk", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; }
    img { max-width: 100%; display: block; }
    button, a { -webkit-tap-highlight-color: transparent; }

    .case-progress {
      position: fixed;
      inset: 0 auto auto 0;
      z-index: 1200;
      width: 0;
      height: 3px;
      background: var(--lime);
    }

    .case-header {
      position: sticky;
      top: 0;
      z-index: 90;
      color: #fff;
      background: rgba(14, 18, 24, .94);
      border-bottom: 1px solid rgba(255, 255, 255, .08);
      backdrop-filter: blur(18px);
    }
    .case-header__inner {
      width: min(1240px, calc(100% - 40px));
      min-height: 72px;
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }
    .case-brand {
      font-family: Georgia, "Times New Roman", serif;
      font-size: 30px;
      font-weight: 700;
      text-decoration: none;
      letter-spacing: -.04em;
    }
    .case-header__nav { display: flex; align-items: center; gap: 26px; }
    .case-header__nav a {
      color: rgba(255,255,255,.76);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: .08em;
      text-decoration: none;
      text-transform: uppercase;
    }
    .case-header__nav a:hover,
    .case-header__nav a:focus-visible { color: var(--green); }
    .case-back {
      display: inline-flex;
      align-items: center;
      gap: 9px;
    }

    .case-shell { overflow: clip; background: var(--paper); }
    .case-container { width: min(1240px, calc(100% - 40px)); margin-inline: auto; }
    .case-narrow { width: min(820px, calc(100% - 40px)); margin-inline: auto; }
    .case-section {
      padding: 118px 0;
      border-top: 1px solid var(--line);
      scroll-margin-top: 78px;
    }
    .case-section--dark,
    .case-section--green,
    .case-section--white { color: var(--ink); background: var(--paper); border-color: var(--line); }

    .case-eyebrow {
      margin: 0 0 18px;
      color: var(--green-dark);
      font-size: 12px;
      font-weight: 800;
      letter-spacing: .16em;
      text-transform: uppercase;
    }
    .case-section--dark .case-eyebrow,
    .case-section--green .case-eyebrow { color: var(--green); }
    .case-title {
      max-width: 850px;
      margin: 0;
      font-family: Georgia, "Noto Serif TC", "Songti TC", serif;
      font-size: clamp(38px, 6vw, 78px);
      font-weight: 500;
      line-height: 1.13;
      letter-spacing: -.045em;
    }
    .case-heading {
      margin: 0;
      font-family: Georgia, "Noto Serif TC", "Songti TC", serif;
      font-size: clamp(32px, 4vw, 54px);
      font-weight: 500;
      line-height: 1.2;
      letter-spacing: -.035em;
    }
    .case-lead {
      max-width: 760px;
      margin: 30px 0 0;
      color: #4b515a;
      font-size: clamp(18px, 2vw, 23px);
      line-height: 1.75;
    }
    .case-section--dark .case-lead,
    .case-section--green .case-lead { color: #4b515a; }
    .case-copy { color: #4b515a; font-size: 17px; }
    .case-copy p { margin: 0 0 22px; }
    .case-section--dark .case-copy,
    .case-section--green .case-copy { color: #4b515a; }

    .case-hero {
      position: relative;
      padding: 112px 0 110px;
      color: var(--ink);
      background:
        linear-gradient(rgba(14,18,24,.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(14,18,24,.045) 1px, transparent 1px),
        var(--paper);
      background-size: 42px 42px;
    }
    .case-hero .case-lead { color: #4b515a; }
    .case-hero__label {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      margin-bottom: 28px;
      padding: 8px 13px;
      background: rgba(255,255,255,.76);
      border: 1px solid var(--line);
      border-radius: 999px;
      color: #4b515a;
      font-size: 12px;
      font-weight: 800;
      letter-spacing: .08em;
      text-transform: uppercase;
    }
    .case-hero__label::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--green); }
    .case-hero__summary {
      display: grid;
      grid-template-columns: minmax(0, 1.5fr) minmax(270px, .7fr);
      gap: 80px;
      align-items: end;
      margin-top: 48px;
    }
    .case-hero__aside {
      padding-left: 24px;
      border-left: 2px solid var(--green);
      color: #5d636c;
      font-size: 16px;
    }
    .case-hero__aside strong { display: block; margin-bottom: 7px; color: var(--ink); }
    .case-meta {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 0;
      margin-top: 78px;
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }
    .case-meta__item { padding: 24px 20px 24px 0; }
    .case-meta__item + .case-meta__item { padding-left: 24px; border-left: 1px solid var(--line); }
    .case-meta__item small { display: block; margin-bottom: 5px; color: #7d838c; font-size: 11px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
    .case-meta__item strong { font-size: 15px; line-height: 1.45; }

    .case-hero__visual {
      position: relative;
      min-height: 620px;
      margin-top: 82px;
      padding: 72px;
      overflow: hidden;
      background: var(--primary-color);
      border-radius: 34px;
      box-shadow: var(--shadow);
    }
    .case-hero__visual::before {
      content: "";
      position: absolute;
      width: 520px;
      height: 520px;
      top: -260px;
      right: -120px;
      border: 1px solid rgba(249,212,66,.35);
      border-radius: 50%;
      box-shadow: 0 0 0 80px rgba(249,212,66,.04), 0 0 0 160px rgba(249,212,66,.025);
    }
    .mock-app {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 210px 1fr;
      min-height: 470px;
      overflow: hidden;
      background: #eef2f6;
      border: 1px solid rgba(255,255,255,.28);
      border-radius: 22px;
      box-shadow: 0 34px 80px rgba(0,0,0,.26);
      transform: rotate(-1deg);
    }
    .mock-sidebar { padding: 25px 18px; color: #d7dadd; background: var(--primary-color); }
    .mock-logo { margin-bottom: 38px; font-family: Georgia, serif; font-size: 21px; color: var(--white); }
    .mock-nav { display: grid; gap: 8px; }
    .mock-nav span { padding: 9px 11px; border-radius: 9px; font-size: 11px; }
    .mock-nav span:first-child { color: var(--green-dark); background: var(--lime); font-weight: 800; }
    .mock-main { padding: 32px; }
    .mock-top { display: flex; justify-content: space-between; align-items: center; gap: 20px; }
    .mock-top h2 { margin: 0; font-size: 24px; letter-spacing: -.04em; }
    .mock-search { width: 180px; height: 34px; background: var(--white); border: 1px solid #d7dadd; border-radius: 10px; }
    .mock-feature { display: grid; grid-template-columns: 1.25fr .75fr; gap: 16px; margin-top: 26px; }
    .mock-panel { min-height: 132px; padding: 22px; border-radius: 15px; background: var(--green-soft); }
    .mock-panel--accent { color: var(--white); background: var(--green); }
    .mock-panel small { display: block; opacity: .66; font-size: 9px; font-weight: 800; letter-spacing: .1em; }
    .mock-panel strong { display: block; max-width: 260px; margin-top: 20px; font-size: 18px; line-height: 1.25; }
    .mock-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; margin-top: 16px; }
    .mock-card { min-height: 126px; padding: 16px; background: var(--white); border: 1px solid #d7dadd; border-radius: 14px; }
    .mock-card i { display: block; width: 34px; height: 34px; margin-bottom: 22px; border-radius: 10px; background: var(--green-soft); }
    .mock-card:nth-child(2) i { background: var(--blue); }
    .mock-card:nth-child(3) i { background: #ff99c0; }
    .mock-card b { display: block; font-size: 11px; }
    .mock-card span { color: #858b86; font-size: 9px; }
    .case-nda {
      position: absolute;
      z-index: 4;
      right: 92px;
      bottom: 34px;
      max-width: 330px;
      padding: 14px 17px;
      color: rgba(255,255,255,.74);
      background: rgba(14,18,24,.75);
      border: 1px solid rgba(255,255,255,.2);
      border-radius: 12px;
      font-size: 12px;
      line-height: 1.6;
      backdrop-filter: blur(12px);
    }
    .case-disclosure {
      display: grid;
      grid-template-columns: 120px minmax(0, 1fr);
      gap: 28px;
      margin-top: 24px;
      padding: 24px 28px;
      color: #4b515a;
      background: rgba(255,255,255,.72);
      border: 1px solid var(--line);
      border-radius: 18px;
      font-size: 13px;
      line-height: 1.75;
    }
    .case-disclosure strong { color: var(--ink); }
    .case-disclosure p { margin: 0; }

    .case-layout { display: block; }
    .case-content { min-width: 0; }
    .case-toc {
      position: fixed;
      z-index: 70;
      top: 50%;
      right: 18px;
      width: 160px;
      padding: 14px;
      transform: translateY(-50%);
      background: rgba(255,255,255,.88);
      border: 1px solid rgba(14,18,24,.1);
      border-radius: 22px;
      box-shadow: 0 18px 50px rgba(14,18,24,.1);
      backdrop-filter: blur(18px);
      transition: opacity .22s ease, visibility .22s ease, transform .22s ease;
    }
    .case-toc.is-hidden { opacity: 0; visibility: hidden; pointer-events: none; transform: translate(12px, -50%); }
    .case-toc small { display: block; margin: 2px 10px 10px; color: var(--muted); font-size: 10px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
    .case-toc a {
      display: block;
      margin-top: 2px;
      padding: 8px 10px;
      color: #767d87;
      border-radius: 11px;
      font-size: 12px;
      font-weight: 650;
      line-height: 1.45;
      text-decoration: none;
      transition: color .22s ease, background-color .22s ease, transform .22s ease;
    }
    .case-toc a:hover { color: var(--ink); background: var(--green-soft); transform: translateX(2px); }
    .case-toc a.is-active { color: var(--white); background: var(--primary-color); }
    .case-toc a:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; }

    .case-quote {
      margin: 64px 0 0;
      padding: 34px 36px;
      background: var(--green-soft);
      border-left: 4px solid var(--green);
      border-radius: 0 var(--radius) var(--radius) 0;
      color: var(--green-dark);
      font-family: Georgia, "Noto Serif TC", serif;
      font-size: clamp(22px, 3vw, 32px);
      line-height: 1.55;
    }

    .case-users { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 56px; }
    .case-user {
      min-height: 250px;
      padding: 32px;
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: var(--radius);
    }
    .case-user__number { display: inline-grid; place-items: center; width: 42px; height: 42px; margin-bottom: 50px; color: var(--green-dark); background: var(--lime); border-radius: 50%; font-weight: 800; }
    .case-user h3 { margin: 0 0 12px; font-size: 24px; }
    .case-user p { margin: 0; color: var(--muted); font-size: 15px; }

    .case-subsection { margin-top: 110px; padding-top: 110px; border-top: 1px solid var(--line); }
    .case-problems { display: grid; margin-top: 62px; border-bottom: 1px solid var(--line); }
    .case-problem { display: grid; grid-template-columns: 70px minmax(240px, .75fr) minmax(0, 1fr); align-items: start; gap: 28px; min-height: 0; padding: 30px 0; background: transparent; border: 0; border-top: 1px solid var(--line); border-radius: 0; }
    .case-problem span { color: var(--green); font-family: Georgia, serif; font-size: 18px; }
    .case-problem h3 { margin: 0; color: var(--ink); font-size: 21px; line-height: 1.45; }
    .case-problem p { margin: 0; color: var(--muted); font-size: 14px; }

    .case-role { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 60px; }
    .case-role__box { padding: 34px; border: 1px solid var(--line); border-radius: var(--radius); }
    .case-role__box { background: var(--white); }
    .case-role__box--primary { color: var(--ink); background: var(--white); border-color: var(--line); box-shadow: inset 4px 0 0 var(--green); }
    .case-role__box h3 { margin: 0 0 22px; font-size: 20px; }
    .case-list { margin: 0; padding: 0; list-style: none; }
    .case-list li { position: relative; padding: 12px 0 12px 24px; border-top: 1px solid rgba(104,109,104,.24); font-size: 15px; }
    .case-list li::before { content: "↗"; position: absolute; left: 0; color: var(--green); }
    .case-role__box--primary .case-list li { border-color: rgba(104,109,104,.24); }
    .case-role__box--primary .case-list li::before { color: var(--green); }

    .case-constraints { display: grid; grid-template-columns: minmax(240px, .7fr) minmax(0, 1.3fr); gap: 48px; margin-top: 42px; padding: 38px 0 0; border-top: 1px solid var(--line); }
    .case-constraints .case-eyebrow { margin-bottom: 10px; }
    .case-constraints h3 { margin: 0; font-size: 23px; line-height: 1.45; }
    .case-constraints .case-list li:first-child { border-top: 0; }

    .case-decisions { display: grid; gap: 22px; margin-top: 72px; }
    .case-decision {
      display: grid;
      grid-template-columns: 82px minmax(0, 1fr) minmax(270px, .72fr);
      gap: 34px;
      padding: 38px 0;
      background: transparent;
      border: 0;
      border-top: 1px solid var(--line);
      border-radius: 0;
    }
    .case-decision:last-child { border-bottom: 1px solid var(--line); }
    .case-decision__num { font-family: Georgia, serif; font-size: 52px; line-height: 1; color: var(--green); }
    .case-decision h3 { margin: 0 0 15px; font-size: 24px; line-height: 1.4; }
    .case-decision p { margin: 0; color: var(--muted); font-size: 15px; }
    .case-decision p strong { color: var(--ink); font-weight: 700; }
    .case-decision__result { padding-left: 24px; border-left: 1px solid var(--line); }
    .case-decision__result small { display: block; margin-bottom: 12px; color: var(--green-dark); font-size: 10px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }

    .case-process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 62px; }
    .case-step { min-height: 250px; padding: 26px 20px 0 0; color: var(--ink); background: transparent; border: 0; border-top: 2px solid var(--green); border-radius: 0; }
    .case-step:nth-child(2),
    .case-step:nth-child(3),
    .case-step:nth-child(4) { color: var(--ink); background: transparent; border-top-color: var(--green); }
    .case-step:nth-child(4) p { color: #565b56; }
    .case-step small { font-size: 10px; font-weight: 800; letter-spacing: .12em; }
    .case-step h3 { margin: 90px 0 14px; font-family: Georgia, serif; font-size: 28px; }
    .case-step p { margin: 0; color: #565b56; font-size: 14px; }

    .case-evolution { margin-top: 70px; padding: 34px; background: #eef2f6; border-radius: var(--radius); }
    .case-evolution__head { display: flex; justify-content: space-between; gap: 30px; margin-bottom: 28px; }
    .case-evolution__head h3 { margin: 0; font-size: 21px; }
    .case-evolution__head p { max-width: 500px; margin: 0; color: var(--muted); font-size: 14px; }
    .case-evolution__cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .evo-card { min-height: 250px; padding: 20px; background: var(--white); border: 1px solid #d7dadd; border-radius: 16px; }
    .evo-card small { color: var(--green-dark); font-size: 10px; font-weight: 800; }
    .evo-ui { margin: 28px 0 24px; padding: 14px; border: 1px solid #d7dadd; border-radius: 12px; }
    .evo-ui i { display: block; width: 38px; height: 38px; border-radius: 11px; background: var(--green-soft); }
    .evo-ui b { display: block; width: 68%; height: 9px; margin-top: 18px; border-radius: 99px; background: #a9aebd; }
    .evo-ui span { display: block; width: 88%; height: 6px; margin-top: 8px; border-radius: 99px; background: #d7dadd; }
    .evo-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.6; }

    .case-evidence { margin-top: 76px; }
    .case-evidence--compact { margin-top: 86px; }
    .case-evidence__head { display: flex; justify-content: space-between; align-items: end; gap: 40px; margin-bottom: 28px; }
    .case-evidence__head small { color: var(--green); font-size: 10px; font-weight: 800; letter-spacing: .13em; }
    .case-evidence__head h3 { margin: 8px 0 0; font-size: 24px; line-height: 1.35; }
    .case-evidence__head p { max-width: 490px; margin: 0; color: var(--muted); font-size: 14px; }
    .case-evidence__figure { position: relative; margin: 0; overflow: hidden; border-radius: 28px; background: #dfe4e8; }
    .case-evidence__figure img { width: 100%; aspect-ratio: 16 / 8.6; object-fit: cover; }
    .case-evidence__figure figcaption { position: absolute; right: 18px; bottom: 18px; left: 18px; width: fit-content; max-width: calc(100% - 36px); padding: 9px 12px; color: rgba(255,255,255,.82); background: rgba(14,18,24,.76); border-radius: 10px; font-size: 11px; line-height: 1.45; backdrop-filter: blur(10px); }
    .case-evidence__notes,
    .case-evidence__legend { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 28px; }
    .case-evidence__legend { grid-template-columns: repeat(4, 1fr); }
    .case-evidence__notes > div,
    .case-evidence__legend > div { padding-top: 18px; border-top: 1px solid var(--line); }
    .case-evidence__notes small,
    .case-evidence__legend small { color: var(--green-dark); font-size: 10px; font-weight: 800; letter-spacing: .08em; }
    .case-evidence__notes p,
    .case-evidence__legend p { margin: 10px 0 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
    .case-evidence__legend h3 { margin: 10px 0 0; font-size: 18px; }

    .case-system-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 60px; }
    .case-system-card { min-height: 265px; padding: 30px; color: var(--ink); background: var(--white); border: 1px solid var(--line); border-top: 4px solid var(--green); border-radius: var(--radius); }
    .case-system-card:nth-child(1) { background: var(--white); }
    .case-system-card:nth-child(2) { color: var(--ink); background: var(--white); border-top-color: var(--orange); }
    .case-system-card:nth-child(3) { color: var(--ink); background: var(--white); border-top-color: var(--blue); }
    .case-system-card:nth-child(4) { background: var(--white); border-top-color: var(--lime); }
    .case-system-card small { font-size: 10px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
    .case-system-card h3 { margin: 78px 0 14px; font-size: 25px; }
    .case-system-card p { margin: 0; opacity: .68; font-size: 14px; }

    .case-flow { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 0; margin-top: 60px; }
    .case-flow__item { position: relative; padding: 0 12px; text-align: center; }
    .case-flow__item:not(:last-child)::after { content: "→"; position: absolute; top: 14px; right: -7px; color: #a9aebd; }
    .case-flow__dot { display: grid; place-items: center; width: 44px; height: 44px; margin: 0 auto 17px; color: var(--ink); background: var(--green-soft); border: 1px solid rgba(151,208,183,.28); border-radius: 50%; font-size: 11px; font-weight: 800; }
    .case-flow__item b { display: block; font-size: 12px; line-height: 1.4; }
    .case-flow__item span { display: block; margin-top: 5px; color: var(--muted); font-size: 10px; line-height: 1.4; }

    .case-improve { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 70px; }
    .case-improve__card { padding: 27px; color: var(--ink); background: var(--white); border: 1px solid var(--line); border-radius: 18px; }
    .case-improve__card small { color: var(--green-dark); font-size: 10px; font-weight: 800; letter-spacing: .1em; }
    .case-improve__card h3 { margin: 46px 0 10px; font-size: 19px; }
    .case-improve__card p { margin: 0; color: var(--muted); font-size: 13px; }

    .case-outcomes { display: grid; margin-top: 64px; border-bottom: 1px solid var(--line); }
    .case-outcome { display: grid; grid-template-columns: 210px minmax(260px, .75fr) minmax(0, 1fr); gap: 34px; align-items: start; min-height: 0; padding: 34px 0; color: var(--ink); background: transparent; border: 0; border-top: 1px solid var(--line); border-radius: 0; }
    .case-outcome:nth-child(1),
    .case-outcome:nth-child(2),
    .case-outcome:nth-child(3),
    .case-outcome:nth-child(4) { color: var(--ink); background: transparent; border-top-color: var(--line); }
    .case-outcome:nth-child(3) small,
    .case-outcome:nth-child(3) p,
    .case-outcome:nth-child(4) small,
    .case-outcome:nth-child(4) p { color: var(--muted); }
    .case-outcome small { color: var(--green-dark); font-size: 10px; font-weight: 800; letter-spacing: .1em; }
    .case-outcome h3 { margin: 0; font-size: 20px; }
    .case-outcome p { margin: 0; color: #5e635e; font-size: 13px; }

    .case-reflection { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 80px; align-items: start; }
    .case-next { display: grid; gap: 14px; }
    .case-next__item { display: grid; grid-template-columns: 52px 1fr; gap: 18px; padding: 24px 0; border-top: 1px solid var(--line); }
    .case-next__item span { display: grid; place-items: center; width: 40px; height: 40px; color: var(--green-dark); background: var(--green-soft); border-radius: 50%; font-weight: 800; }
    .case-next__item h3 { margin: 0 0 7px; font-size: 18px; }
    .case-next__item p { margin: 0; color: var(--muted); font-size: 14px; }

    .case-footer { padding: 78px 0; color: var(--white); background: var(--primary-color); }
    .case-footer__inner { display: flex; justify-content: space-between; align-items: flex-end; gap: 40px; }
    .case-footer h2 { max-width: 720px; margin: 0; font-family: Georgia, serif; font-size: clamp(34px, 5vw, 64px); font-weight: 500; line-height: 1.15; letter-spacing: -.04em; }
    .case-footer a { display: inline-flex; gap: 10px; align-items: center; padding: 13px 18px; color: var(--ink); background: var(--lime); border-radius: 999px; font-weight: 800; text-decoration: none; white-space: nowrap; }
    .case-footer .case-eyebrow { color: #9dc8b5; }
    .case-footer__note { max-width: 620px; margin: 22px 0 0; color: rgba(255,255,255,.65); font-size: 15px; }
    .eden-case-study .eden-back-to-top { z-index: 900; }

    @media (min-width: 1181px) {
      .case-container { width: min(1120px, calc(100% - 360px)); }
    }

    @media (min-width: 901px) and (max-width: 1180px) {
      .case-container { width: min(900px, calc(100% - 220px)); margin-left: 20px; margin-right: auto; }
      .case-narrow { width: min(760px, calc(100% - 220px)); margin-left: 20px; margin-right: auto; }
    }

    @media (max-width: 900px) {
      .case-toc {
        top: auto;
        right: max(12px, env(safe-area-inset-right));
        bottom: calc(12px + env(safe-area-inset-bottom));
        left: max(12px, env(safe-area-inset-left));
        z-index: 850;
        display: flex;
        width: auto;
        padding: 8px;
        transform: none;
        overflow-x: auto;
        overscroll-behavior-x: contain;
        border-radius: 18px;
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
      }
      .case-toc::-webkit-scrollbar { display: none; }
      .case-toc small { display: none; }
      .case-toc a {
        flex: 0 0 auto;
        margin: 0;
        padding: 9px 12px;
        white-space: nowrap;
      }
      .case-toc a:hover { transform: none; }
      .case-toc.is-hidden { transform: translateY(16px); }
      .eden-case-study .eden-back-to-top { right: 14px; bottom: calc(78px + env(safe-area-inset-bottom)); }
      .case-footer { padding-bottom: calc(150px + env(safe-area-inset-bottom)); }
    }

    @media (max-width: 980px) {
      .case-header__nav a:not(.case-back) { display: none; }
      .case-hero__summary, .case-reflection { grid-template-columns: 1fr; gap: 38px; }
      .case-meta { grid-template-columns: repeat(2, 1fr); }
      .case-meta__item:nth-child(odd) { padding-left: 0; border-left: 0; }
      .case-meta__item:nth-child(even) { padding-left: 20px; border-left: 1px solid var(--line); }
      .case-meta__item:last-child { grid-column: 1 / -1; border-top: 1px solid var(--line); }
      .case-hero__visual { min-height: 500px; padding: 45px; }
      .mock-app { grid-template-columns: 150px 1fr; min-width: 760px; }
      .case-layout { display: block; }
      .case-decision { grid-template-columns: 70px 1fr; }
      .case-decision__result { grid-column: 2; padding: 24px 0 0; border: 0; border-top: 1px solid var(--line); }
      .case-process { grid-template-columns: repeat(2, 1fr); }
      .case-outcomes { grid-template-columns: 1fr; }
      .case-outcome { grid-template-columns: 170px minmax(0, 1fr); }
      .case-outcome p { grid-column: 2; }
      .case-evidence__legend { grid-template-columns: repeat(2, 1fr); }
      .case-flow { grid-template-columns: repeat(4, 1fr); gap: 28px 0; }
      .case-flow__item:nth-child(4)::after { display: none; }
    }

    @media (max-width: 680px) {
      .case-container, .case-narrow, .case-header__inner { width: min(100% - 28px, 1240px); }
      .case-header__inner { min-height: 62px; }
      .case-brand { font-size: 25px; }
      .case-header__nav { gap: 0; }
      .case-header__nav a { font-size: 11px; }
      .case-section { padding: 82px 0; }
      .case-hero { padding-top: 76px; }
      .case-title { font-size: clamp(41px, 13vw, 62px); }
      .case-hero__summary { margin-top: 34px; }
      .case-meta { margin-top: 52px; }
      .case-meta__item { padding: 18px 12px 18px 0; }
      .case-meta__item:nth-child(even) { padding-left: 14px; }
      .case-hero__visual { min-height: 370px; margin-top: 52px; padding: 26px 18px; border-radius: 22px; }
      .mock-app { min-width: 650px; min-height: 350px; transform: scale(.78) rotate(-1deg); transform-origin: top left; }
      .case-nda { right: 20px; bottom: 18px; left: 20px; max-width: none; }
      .case-disclosure { grid-template-columns: 1fr; gap: 6px; padding: 20px; }
      .case-users, .case-problems, .case-role, .case-system-grid, .case-improve, .case-constraints { grid-template-columns: 1fr; }
      .case-user, .case-problem { min-height: 220px; }
      .case-subsection { margin-top: 78px; padding-top: 78px; }
      .case-problem { gap: 10px; min-height: 0; padding: 26px 0; }
      .case-decision { grid-template-columns: 1fr; gap: 18px; padding: 28px; }
      .case-decision__num { font-size: 38px; }
      .case-decision__result { grid-column: auto; }
      .case-process, .case-outcomes { grid-template-columns: 1fr; }
      .case-outcome { grid-template-columns: 1fr; gap: 12px; }
      .case-outcome p { grid-column: auto; }
      .case-step { min-height: 230px; }
      .case-step h3 { margin-top: 58px; }
      .case-evolution { padding: 22px; }
      .case-evolution__head { display: block; }
      .case-evolution__head p { margin-top: 12px; }
      .case-evolution__cards { grid-template-columns: 1fr; }
      .case-evidence__head { display: block; }
      .case-evidence__head p { margin-top: 12px; }
      .case-evidence__figure { border-radius: 20px; }
      .case-evidence__figure img { aspect-ratio: 4 / 3; }
      .case-evidence__notes, .case-evidence__legend { grid-template-columns: 1fr; gap: 18px; }
      .case-flow { grid-template-columns: repeat(2, 1fr); }
      .case-flow__item:nth-child(even)::after { display: none; }
      .case-flow__item:nth-child(4)::after { display: none; }
      .case-footer__inner { display: block; }
      .case-footer a { margin-top: 34px; }
    }

    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
    }
  
    /* Case 05 content adapters: same tokens, spacing and components as Case 01 */
    .case-label {
      display: inline-flex; align-items: center; gap: 9px; margin-bottom: 28px;
      padding: 8px 13px; color: #4b515a; background: rgba(255,255,255,.76);
      border: 1px solid var(--line); border-radius: 999px;
      font-size: 12px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase;
    }
    .case-label span { width: 7px; height: 7px; background: var(--green); border-radius: 50%; }
    .case-hero h1 {
      max-width: 850px; margin: 0; font-family: Georgia,"Noto Serif TC","Songti TC",serif;
      font-size: clamp(38px,6vw,78px); font-weight: 500; line-height: 1.13; letter-spacing: -.045em;
    }
    .case-hero h1 em { color: inherit; font-style: normal; }
    .hero-summary {
      display: grid; grid-template-columns: minmax(0,1.5fr) minmax(270px,.7fr);
      gap: 80px; align-items: end; margin-top: 48px;
    }
    .hero-summary p { max-width: 760px; margin: 0; color: #4b515a; font-size: clamp(18px,2vw,23px); line-height: 1.75; }
    .hero-summary aside { padding-left: 24px; color: #5d636c; border-left: 2px solid var(--green); font-size: 16px; }
    .hero-summary aside strong { display: block; margin-bottom: 7px; color: var(--ink); }
    .case-meta > .col { padding: 24px 20px 24px 0; }
    .case-meta > .col + .col { padding-left: 24px; border-left: 1px solid var(--line); }
    .case-meta > .col small { display: block; margin-bottom: 5px; color: var(--muted); font-size: 11px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
    .case-meta > .col strong { font-size: 15px; line-height: 1.45; }

    .browser-mock { position: relative; z-index: 2; min-height: 470px; overflow: hidden; background: #eef2f6; border-radius: 22px; box-shadow: 0 34px 80px rgba(0,0,0,.26); transform: rotate(-1deg); }
    .browser-bar { display: grid; grid-template-columns: 80px 1fr 55px; gap: 14px; align-items: center; height: 48px; padding: 0 18px; color: var(--muted); background: #fff; border-bottom: 1px solid var(--line); font-size: 9px; font-weight: 800; }
    .browser-dots { display: flex; gap: 6px; }
    .browser-dots i { width: 8px; height: 8px; background: #c6cbd1; border-radius: 50%; }
    .browser-address { padding: 5px 12px; overflow: hidden; background: var(--paper); border-radius: 99px; text-overflow: ellipsis; white-space: nowrap; }
    .browser-body { display: grid; grid-template-columns: 175px minmax(0,1fr); min-height: 420px; }
    .browser-body .mock-sidebar { padding: 26px 18px; color: rgba(255,255,255,.64); background: var(--primary-color); }
    .browser-body .mock-sidebar strong { display: block; margin-bottom: 30px; color: #fff; font-family: Georgia,serif; font-size: 18px; }
    .browser-body .mock-sidebar span { display: block; margin-top: 7px; padding: 8px 10px; border-radius: 8px; font-size: 10px; }
    .browser-body .mock-sidebar .active { color: var(--ink); background: var(--lime); font-weight: 800; }
    .browser-body .mock-main { position: relative; padding: 30px; }
    .mock-heading { display: flex; justify-content: space-between; align-items: center; }
    .mock-heading small { display: block; color: var(--muted); font-size: 9px; font-weight: 800; letter-spacing: .12em; }
    .mock-heading b { display: block; margin-top: 4px; font-size: 23px; }
    .mock-heading > i { width: 34px; height: 34px; background: var(--green-soft); border-radius: 50%; }
    .mock-filters { display: flex; gap: 10px; margin-top: 24px; }
    .mock-filters span { min-width: 112px; padding: 8px 11px; background: #fff; border: 1px solid var(--line); border-radius: 8px; font-size: 9px; }
    .mock-table { margin-top: 14px; overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: 12px; }
    .mock-table > div { display: grid; grid-template-columns: 1fr 60px; align-items: center; gap: 18px; min-height: 43px; padding: 0 16px; border-bottom: 1px solid var(--line); font-size: 9px; }
    .mock-table > div:last-child { border-bottom: 0; }
    .mock-table-row i { height: 6px; background: #cfd5da; border-radius: 99px; }
    .mock-table-row span { color: var(--muted); text-align: right; }
    .locator-tag { position: absolute; padding: 5px 8px; color: #fff; background: var(--green); border-radius: 99px; box-shadow: 0 8px 20px rgba(14,18,24,.14); font-size: 8px; font-style: normal; font-weight: 800; }
    .locator-tag--one { top: 105px; right: 24px; } .locator-tag--two { right: 64px; bottom: 110px; }
    .test-runner { position: absolute; z-index: 4; right: 38px; bottom: 32px; width: min(340px,54%); padding: 18px; color: rgba(255,255,255,.7); background: rgba(14,18,24,.94); border-radius: 14px; box-shadow: 0 20px 42px rgba(0,0,0,.3); }
    .runner-head { display: flex; justify-content: space-between; font-size: 10px; }
    .runner-head i { display: inline-block; width: 7px; height: 7px; margin-right: 6px; background: var(--lime); border-radius: 50%; }
    .test-runner p { margin: 14px 0 10px; font: 10px/1.6 ui-monospace,SFMono-Regular,Menlo,monospace; }
    .test-runner p b, .test-runner > strong { color: var(--lime); }
    .runner-progress { height: 4px; overflow: hidden; background: rgba(255,255,255,.13); border-radius: 99px; }
    .runner-progress i { display: block; width: 100%; height: 100%; background: var(--green); }
    .test-runner > strong { display: block; margin-top: 12px; font-size: 11px; }

    .case-section h2 {
      margin: 0; font-family: Georgia,"Noto Serif TC","Songti TC",serif;
      font-size: clamp(32px,4vw,54px); font-weight: 500; line-height: 1.2; letter-spacing: -.035em;
    }
    .case-section blockquote { margin: 64px 0 0; padding: 34px 36px; color: var(--green-dark); background: var(--green-soft); border-left: 4px solid var(--green); border-radius: 0 var(--radius) var(--radius) 0; font: clamp(22px,3vw,32px)/1.55 Georgia,"Noto Serif TC",serif; }
    .overview-cards { display: grid; grid-template-columns: repeat(2,1fr); gap: 20px; margin-top: 56px; }
    .overview-cards article { min-height: 250px; padding: 32px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
    .overview-cards article > span { display: inline-grid; place-items: center; width: 42px; height: 42px; margin-bottom: 50px; background: var(--lime); border-radius: 50%; font-weight: 800; }
    .overview-cards h3 { margin: 0 0 12px; font-size: 24px; } .overview-cards p { margin: 0; color: var(--muted); font-size: 15px; }

    .problem-list { display: grid; margin-top: 62px; border-bottom: 1px solid var(--line); }
    .problem-list article { display: grid; grid-template-columns: 70px minmax(240px,.75fr) minmax(0,1fr); gap: 28px; padding: 30px 0; border-top: 1px solid var(--line); }
    .problem-list article > span { color: var(--green); font-family: Georgia,serif; font-size: 18px; }
    .problem-list h3 { margin: 0; font-size: 21px; } .problem-list p { margin: 0; color: var(--muted); font-size: 14px; }

    .decision-list { display: grid; gap: 22px; margin-top: 72px; }
    .decision-list article { display: grid; grid-template-columns: 82px minmax(0,1fr) minmax(270px,.72fr); gap: 34px; padding: 38px 0; border-top: 1px solid var(--line); }
    .decision-list article:last-child { border-bottom: 1px solid var(--line); }
    .decision-list article > b { color: var(--green); font: 52px/1 Georgia,serif; }
    .decision-list h3 { margin: 0 0 15px; font-size: 24px; } .decision-list p { margin: 0; color: var(--muted); font-size: 15px; }
    .decision-list aside { padding-left: 24px; border-left: 1px solid var(--line); }
    .decision-list aside small { color: var(--green-dark); font-size: 10px; font-weight: 800; letter-spacing: .12em; }

    .architecture { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; margin-top: 62px; }
    .architecture article { min-height: 250px; padding: 26px 20px 0 0; border-top: 2px solid var(--green); }
    .architecture article > i { display: none; }
    .architecture small { font-size: 10px; font-weight: 800; letter-spacing: .12em; }
    .architecture h3 { margin: 90px 0 14px; font: 28px Georgia,serif; } .architecture p { margin: 0; color: #565b56; font-size: 14px; }
    .code-layout { display: grid; grid-template-columns: minmax(0,1.3fr) minmax(280px,.7fr); gap: 20px; margin-top: 68px; }
    .code-window { overflow: hidden; color: #dfe6ea; background: #111820; border-radius: var(--radius); box-shadow: var(--shadow); }
    .code-title { display: flex; justify-content: space-between; padding: 14px 18px; color: rgba(255,255,255,.66); border-bottom: 1px solid rgba(255,255,255,.1); font-size: 11px; }
    .code-title span { display: flex; gap: 6px; } .code-title i { width: 8px; height: 8px; background: #66717d; border-radius: 50%; }
    .code-window pre { margin: 0; padding: 30px; overflow-x: auto; font: 12px/1.85 ui-monospace,SFMono-Regular,Menlo,monospace; }
    .code-pink { color: #ff99c0; } .code-yellow { color: #f9d442; } .code-blue { color: #b3a2d3; } .code-green { color: #97d0b7; }
    .principles { height: 100%; padding: 30px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
    .principles > small { color: var(--green-dark); font-size: 10px; font-weight: 800; letter-spacing: .12em; }
    .principles h3 { margin: 54px 0 20px; font-size: 22px; line-height: 1.45; }
    .principles ul { margin: 0; padding: 0; list-style: none; } .principles li { display: flex; gap: 10px; padding: 11px 0; color: var(--muted); border-top: 1px solid var(--line); font-size: 13px; }

    .suite-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; margin-top: 60px; }
    .suite-grid article { min-height: 225px; padding: 30px; background: #fff; border: 1px solid var(--line); border-top: 4px solid var(--green); border-radius: var(--radius); }
    .suite-grid article > div { display: flex; justify-content: space-between; color: var(--green); font-size: 10px; font-weight: 800; }
    .suite-grid h3 { margin: 56px 0 14px; font-size: 20px; } .suite-grid p { margin: 0; color: var(--muted); font-size: 14px; }
    .evidence-panel { display: grid; grid-template-columns: minmax(270px,.7fr) minmax(0,1.3fr); gap: 56px; align-items: center; margin-top: 76px; padding-top: 76px; border-top: 1px solid var(--line); }
    .evidence-copy > small { color: var(--green); font-size: 10px; font-weight: 800; letter-spacing: .12em; }
    .evidence-copy h3 { margin: 16px 0; font-size: 26px; line-height: 1.4; } .evidence-copy p { margin: 0; color: var(--muted); font-size: 14px; }
    .doc-note { display: flex; gap: 14px; margin-top: 24px; padding-top: 20px; color: var(--muted); border-top: 1px solid var(--line); font-size: 12px; }
    .doc-note b { display: block; color: var(--ink); }
    .doc-window { overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
    .doc-toolbar { display: flex; justify-content: space-between; padding: 16px 20px; color: #fff; background: var(--primary-color); font-size: 11px; }
    .doc-row { display: grid; grid-template-columns: 80px minmax(0,1fr) 70px; gap: 12px; align-items: center; min-height: 54px; padding: 0 20px; border-bottom: 1px solid var(--line); font-size: 12px; }
    .doc-row--head { color: var(--muted); background: var(--paper); font-size: 9px; text-transform: uppercase; } .doc-row em { color: var(--green); font-style: normal; font-weight: 800; }
    .doc-result { display: flex; align-items: center; gap: 14px; padding: 22px 20px; color: var(--green-dark); background: var(--green-soft); }
    .doc-result b, .doc-result span { display: block; } .doc-result span { color: var(--muted); font-size: 11px; }

    .outcomes { display: grid; margin-top: 64px; border-bottom: 1px solid var(--line); }
    .outcomes article { display: grid; grid-template-columns: 210px minmax(260px,.75fr) minmax(0,1fr); gap: 34px; padding: 34px 0; border-top: 1px solid var(--line); }
    .outcomes article > strong { color: var(--green); font: 28px Georgia,serif; } .outcomes h3 { margin: 0; font-size: 20px; } .outcomes p { margin: 0; color: var(--muted); font-size: 13px; }
    .impact-line { display: grid; grid-template-columns: auto 1fr auto auto 1fr; gap: 18px; align-items: center; margin-top: 52px; padding: 26px 0; border-block: 1px solid var(--line); }
    .impact-line span { color: var(--green); font-size: 10px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; } .impact-line p { margin: 0; color: var(--muted); font-size: 14px; }
    .reflection-grid { display: grid; grid-template-columns: minmax(0,.85fr) minmax(0,1.15fr); gap: 80px; }
    .reflection-copy > p { margin: 0 0 22px; color: #4b515a; font-size: 17px; }
    .next-list { display: grid; gap: 14px; margin-top: 36px; }
    .next-list article { display: grid; grid-template-columns: 52px 1fr; gap: 18px; padding: 24px 0; border-top: 1px solid var(--line); }
    .next-list article > span { display: grid; place-items: center; width: 40px; height: 40px; background: var(--green-soft); border-radius: 50%; font-weight: 800; }
    .next-list h3 { margin: 0 0 7px; font-size: 18px; } .next-list p { margin: 0; color: var(--muted); font-size: 14px; }

    .case-footer .case-container { display: flex; justify-content: space-between; align-items: flex-end; gap: 40px; }
    .case-footer .case-container > div > p:last-child { max-width: 620px; margin: 22px 0 0; color: rgba(255,255,255,.65); font-size: 15px; }

    @media (max-width: 980px) {
      .hero-summary, .reflection-grid { grid-template-columns: 1fr; gap: 38px; }
      .architecture { grid-template-columns: repeat(2,1fr); }
      .code-layout, .evidence-panel { grid-template-columns: 1fr; }
      .suite-grid { grid-template-columns: repeat(2,1fr); }
      .browser-mock { overflow-x: auto; } .browser-body { grid-template-columns: 150px minmax(500px,1fr); }
    }
    @media (max-width: 680px) {
      .overview-cards, .architecture, .suite-grid { grid-template-columns: 1fr; }
      .problem-list article, .decision-list article, .outcomes article { grid-template-columns: 1fr; gap: 14px; }
      .decision-list aside { padding: 20px 0 0; border-left: 0; border-top: 1px solid var(--line); }
      .browser-bar, .browser-body { min-width: 650px; }
      .test-runner { right: 18px; bottom: 18px; width: 250px; }
      .doc-window { overflow-x: auto; } .doc-window > * { min-width: 520px; }
      .impact-line { grid-template-columns: auto 1fr; } .impact-line i { display: none; }
      .case-footer .case-container { display: block; }
    }