/* Ocean theme — semantic tokens mapped for legacy case-study markup */
:root {
  --green: #0870ca;
  --green-deep: #086be6;
  --green-soft: #e7f3fd;
  --pink: #116af8;
  --pink-deep: #086be6;
  --pink-soft: #f5faff;
  --coral: #ff8a7a;
  --coral-soft: #fff3f0;
  --purple: #5b8def;
  --purple-soft: #eef4ff;
  --teal: #2aa198;
  --teal-soft: #e6f7f5;
  --gold: #d4a056;
  --gold-soft: #fef6e8;
  --paper: #f7f7f7;
  --white: #ffffff;
  --ink: #343434;
  --text: #46514b;
  --muted: #7b7b7b;
  --rule: rgba(8, 107, 230, 0.22);
  --soft-rule: rgba(8, 112, 202, 0.12);
  --pad: clamp(22px, 4.3vw, 62px);
  --radius: 8px;
  --shadow-sm: 0 2px 8px rgba(8, 107, 230, 0.06);
  --shadow-md: 0 8px 30px rgba(8, 107, 230, 0.1);
  --shadow-lg: 0 16px 48px rgba(8, 107, 230, 0.13);
  --shadow-pink: 0 8px 30px rgba(17, 106, 248, 0.15);
  --font-display: "Zen Kaku Gothic New", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "Roboto", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}


    

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: var(--font-body);
      line-height: 1.6;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    .global-header {
      position: sticky;
      top: 0;
      z-index: 20;
      display: flex;
      height: 68px;
      align-items: center;
      justify-content: space-between;
      padding: 0 var(--pad);
      border-bottom: 1px solid var(--rule);
      background: rgba(255, 254, 250, 0.96);
      backdrop-filter: blur(12px);
    }

    .brand {
      color: var(--green);
      font-size: 14px;
      font-weight: 800;
      letter-spacing: 0.2em;
    }

    .global-nav {
      display: flex;
      gap: clamp(20px, 4vw, 52px);
      font-size: 13px;
      font-weight: 750;
      letter-spacing: 0.16em;
      text-transform: uppercase;
    }

    .global-nav a:hover {
      color: var(--pink-deep);
    }

    .case-hero {
      display: grid;
      min-height: min(840px, calc(100vh - 68px));
      grid-template-columns: 1.04fr 0.96fr;
      border-bottom: 1px solid var(--rule);
    }

    .hero-copy {
      padding: clamp(46px, 7vw, 86px) var(--pad);
      border-right: 1px solid var(--rule);
    }

    .crumb {
      display: inline-flex;
      margin-bottom: clamp(36px, 6vw, 64px);
      color: var(--green);
      font-size: 12px;
      font-weight: 800;
      letter-spacing: 0.16em;
      text-transform: uppercase;
    }

    .chips {
      display: flex;
      flex-wrap: wrap;
      gap: 9px;
      margin-bottom: 23px;
    }

    .chip {
      display: inline-flex;
      min-height: 37px;
      align-items: center;
      padding: 7px 16px;
      border: 1px solid var(--pink);
      border-radius: 999px;
      color: var(--pink-deep);
      font-size: 12px;
      font-weight: 800;
      letter-spacing: 0.09em;
      text-transform: uppercase;
    }

    .hero-copy h1 {
      margin: 0 0 13px;
      color: var(--green-deep);
      font-size: clamp(52px, 6vw, 78px);
      font-weight: 900;
      line-height: 1.06;
    }

    .subtitle {
      margin: 0 0 28px;
      color: var(--green);
      font-size: clamp(21px, 2.3vw, 30px);
      font-weight: 700;
      line-height: 1.4;
    }

    .summary {
      max-width: 670px;
      margin: 0 0 clamp(30px, 4vw, 42px);
      color: var(--text);
      font-size: 16px;
      line-height: 1.92;
    }

    .facts {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      border: 1px solid var(--soft-rule);
    }

    .fact {
      min-height: 88px;
      padding: 15px 16px;
      border-bottom: 1px solid var(--soft-rule);
    }

    .fact:nth-child(odd) {
      border-right: 1px solid var(--soft-rule);
    }

    .fact:nth-last-child(-n + 2) {
      border-bottom: 0;
    }

    .fact strong {
      display: block;
      margin-bottom: 4px;
      color: var(--muted);
      font-size: 11px;
      font-weight: 800;
      letter-spacing: 0.11em;
      text-transform: uppercase;
    }

    .fact span {
      color: var(--green-deep);
      font-size: 14px;
      font-weight: 650;
    }

    .hero-media {
      display: flex;
      min-height: 100%;
      flex-direction: column;
      justify-content: center;
      padding: clamp(34px, 5vw, 56px);
      background: #fcfbf7;
    }

    .phone-placeholder-group {
      display: flex;
      justify-content: center;
      align-items: center;
      min-height: 500px;
      padding: clamp(30px, 4vw, 44px) clamp(18px, 3vw, 32px);
      gap: clamp(10px, 2vw, 20px);
    }

    .phone-shot {
      display: block;
      width: clamp(122px, 15vw, 184px);
      height: auto;
      object-fit: contain;
      filter: drop-shadow(0 20px 22px rgba(0, 0, 0, 0.2));
    }

    .placeholder-note {
      margin: 22px auto 0;
      color: var(--muted);
      text-align: center;
      font-size: 13px;
    }

    .case-layout {
      display: grid;
      grid-template-columns: 252px minmax(0, 1fr);
      align-items: start;
    }

    .case-index {
      position: sticky;
      top: 68px;
      min-height: calc(100vh - 68px);
      padding: 40px 25px 44px var(--pad);
      border-right: 1px solid var(--rule);
    }

    .index-label {
      margin: 0 0 22px;
      color: var(--muted);
      font-size: 11px;
      font-weight: 800;
      letter-spacing: 0.2em;
      text-transform: uppercase;
    }

    .case-index nav {
      display: grid;
      gap: 5px;
    }

    .case-index a {
      display: grid;
      grid-template-columns: 30px 1fr;
      gap: 9px;
      padding: 9px 0;
      color: var(--text);
      font-size: 13px;
      line-height: 1.42;
      transition: color 0.16s ease;
    }

    .case-index a span {
      color: var(--muted);
      font-weight: 750;
    }

    .case-index a.active,
    .case-index a:hover {
      color: var(--pink-deep);
      font-weight: 700;
    }

    .case-index a.active span {
      color: var(--pink-deep);
    }

    .case-body {
      min-width: 0;
    }

    .case-section {
      padding: clamp(52px, 7vw, 86px) var(--pad);
      border-bottom: 1px solid var(--rule);
      break-inside: avoid-page;
      scroll-margin-top: 68px;
    }

    .section-head {
      display: grid;
      grid-template-columns: 74px minmax(0, 1fr);
      gap: 16px;
      margin-bottom: clamp(30px, 4vw, 48px);
    }

    .number {
      color: var(--pink-deep);
      font-size: 15px;
      font-weight: 800;
      letter-spacing: 0.14em;
    }

    h2 {
      margin: 0;
      max-width: 900px;
      color: var(--green-deep);
      font-size: clamp(31px, 3.6vw, 49px);
      line-height: 1.2;
    }

    .lead {
      max-width: 820px;
      margin: -18px 0 34px 90px;
      color: var(--text);
      font-size: 16px;
      line-height: 1.85;
    }

    .cards-4,
    .cards-3,
    .cards-2 {
      display: grid;
      gap: 12px;
    }

    .cards-4 {
      grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .cards-3 {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .cards-2 {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .card {
      min-height: 162px;
      padding: clamp(18px, 2.5vw, 25px);
      border: 1px solid var(--soft-rule);
      background: var(--white);
    }

    .card h3 {
      margin: 0 0 11px;
      color: var(--green-deep);
      font-size: 18px;
    }

    .card p,
    .card li {
      margin: 0;
      color: var(--text);
      font-size: 14px;
      line-height: 1.7;
    }

    .pain-grid {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 14px;
    }

    .pain-card {
      position: relative;
      min-height: 190px;
      overflow: hidden;
      padding: 24px 22px;
      border: 1px solid #fff;
      border-radius: 18px;
      background: rgba(255, 255, 255, 0.72);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      box-shadow: 0 8px 24px rgba(8, 107, 230, 0.08);
    }

    .pain-card::before {
      content: attr(data-index);
      position: absolute;
      right: -8px;
      top: -18px;
      color: rgba(8, 107, 230, 0.1);
      font-size: 86px;
      font-weight: 900;
      line-height: 1;
    }

    .pain-card h3 {
      position: relative;
      margin: 0 0 12px;
      font-size: 19px;
      color: var(--green-deep);
    }

    .pain-card p {
      position: relative;
      margin: 0;
      font-size: 14px;
      line-height: 1.72;
      color: var(--text);
    }

    .competitor-visual-grid {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 14px;
    }

    .competitor-card {
      overflow: hidden;
      border: 1px solid rgba(0, 76, 43, 0.16);
      border-radius: 18px;
      background: var(--white);
      box-shadow: 0 18px 34px rgba(8, 107, 230, 0.08);
    }

    .competitor-shot {
      display: grid;
      height: 170px;
      place-items: center;
      padding: 14px;
      background: linear-gradient(145deg, var(--green-soft), #fff7fb);
    }
    .competitor-shot img {
      display: block;
      max-width: 100%;
      max-height: 142px;
      object-fit: contain;
      border-radius: 14px;
      filter: drop-shadow(0 12px 16px rgba(8, 107, 230, 0.14));
      transition: transform 0.3s ease;
    }
    .competitor-card:hover .competitor-shot img {
      transform: scale(1.03);
    }

    /* ===== Hover Tooltip - 3x Preview ===== */
    .tooltip-preview {
      position: fixed;
      z-index: 999;
      pointer-events: none;
      opacity: 0;
      transform: translate(12px, 12px) scale(0.7);
      transition: opacity 0.2s ease, transform 0.2s ease;
      display: grid;
      place-items: center;
      padding: 12px;
      border-radius: 18px;
      background: var(--white);
      box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
    }
    .tooltip-preview.show {
      opacity: 1;
      transform: translate(12px, 12px) scale(1);
    }
    .tooltip-preview img {
      display: block;
      width: auto;
      height: auto;
      max-width: 90vw;
      max-height: 85vh;
      border-radius: 10px;
      object-fit: contain;
    }

    .competitor-copy {
      padding: 18px 18px 20px;
    }

    .competitor-copy small {
      display: block;
      margin-bottom: 6px;
      color: var(--pink-deep);
      font-size: 11px;
      font-weight: 900;
      letter-spacing: 0.12em;
      text-transform: uppercase;
    }

    .competitor-copy h3 {
      margin: 0 0 9px;
      color: var(--green-deep);
      font-size: 18px;
    }

    .competitor-copy p {
      margin: 0;
      color: var(--text);
      font-size: 13px;
      line-height: 1.65;
    }

    .solution-map {
      display: grid;
      gap: 13px;
    }

    .solution-row {
      display: grid;
      grid-template-columns: minmax(0, 0.92fr) 70px minmax(0, 1fr);
      align-items: stretch;
      gap: 12px;
    }

    .solution-problem,
    .solution-response {
      min-height: 96px;
      padding: 18px 20px;
      border: 1px solid rgba(0, 76, 43, 0.15);
      border-radius: 16px;
      background: var(--white);
    }

    .solution-problem {
      background: linear-gradient(145deg, var(--pink-soft), #fff);
    }

    .solution-response {
      background: linear-gradient(145deg, var(--green-deep), #00643d);
    }

    .solution-kicker {
      display: block;
      margin-bottom: 6px;
      color: var(--pink-deep);
      font-size: 11px;
      font-weight: 900;
      letter-spacing: 0.12em;
      text-transform: uppercase;
    }

    .solution-problem h3,
    .solution-response h3 {
      margin: 0 0 6px;
      font-size: 17px;
      line-height: 1.35;
    }

    .solution-problem h3 {
      color: var(--green-deep);
    }

    .solution-response h3,
    .solution-response p {
      color: var(--white);
    }

    .solution-problem p,
    .solution-response p {
      margin: 0;
      font-size: 13px;
      line-height: 1.58;
    }

    .solution-arrow {
      display: grid;
      place-items: center;
      color: var(--pink-deep);
      font-size: 34px;
      font-weight: 900;
    }

    .experience-mini-grid {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 10px;
      margin-bottom: 30px;
    }

    .experience-mini {
      min-height: 116px;
      padding: 16px 17px;
      border: 1px solid rgba(0, 76, 43, 0.15);
      border-radius: 16px;
      background: var(--white);
      box-shadow: 0 12px 26px rgba(8, 107, 230, 0.06);
    }

    .experience-mini h3 {
      margin: 0 0 8px;
      color: var(--green-deep);
      font-size: 16px;
    }

    .experience-mini p {
      margin: 0;
      color: var(--text);
      font-size: 13px;
      line-height: 1.58;
    }

    .screen-board {
      display: grid;
      grid-template-columns: repeat(6, minmax(110px, 1fr));
      gap: 16px 10px;
      padding: 18px;
      border: 1px solid rgba(0, 76, 43, 0.13);
      border-radius: 20px;
      background: linear-gradient(180deg, #fff, #fbfaf5);
      overflow: visible;
    }

    .screen-board .screen-shot {
      min-height: 0;
      padding: 0;
    }

    .screen-board .screen-shot-media {
      width: 118px;
      height: 238px;
    }

    .case-section .screen-board .screen-shot img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }

    .screen-board .screen-shot strong {
      margin-top: 7px;
      font-size: 12px;
    }

    .screen-board .screen-shot span {
      display: none;
    }

    .path-choice {
      display: grid;
      grid-column: span 2;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 10px;
      min-height: 0;
    }

    .path-group {
      display: grid;
      grid-template-columns: minmax(92px, 1fr);
      gap: 10px;
      align-content: start;
      padding: 12px;
      border: 1px solid rgba(235, 123, 168, 0.36);
      border-radius: 16px;
      background: var(--pink-soft);
      overflow: visible;
    }

    .path-title {
      grid-column: 1 / -1;
      color: var(--pink-deep);
      text-align: center;
      font-size: 12px;
      font-weight: 900;
      letter-spacing: 0.08em;
    }

    .case-section .screen-board .path-group .screen-shot-media {
      width: 118px;
      height: 238px;
    }

    .old-flow,
    .core-flow,
    .agent-flow {
      display: flex;
      flex-wrap: wrap;
      align-items: stretch;
      margin-top: clamp(32px, 4vw, 48px);
      border: 1px solid var(--rule);
    }

    .flow-node {
      position: relative;
      flex: 1 1 130px;
      min-height: 92px;
      padding: 25px 24px 20px;
      color: var(--green-deep);
      font-size: 14px;
      font-weight: 700;
      background: var(--white);
    }

    .flow-node:not(:last-child) {
      border-right: 1px solid var(--soft-rule);
    }

    .flow-node:not(:last-child)::after {
      content: "→";
      position: absolute;
      z-index: 1;
      top: 50%;
      right: -14px;
      display: grid;
      width: 28px;
      height: 28px;
      place-items: center;
      border-radius: 50%;
      color: var(--pink-deep);
      background: var(--paper);
      transform: translateY(-50%);
    }

    .flow-node small {
      display: block;
      margin-bottom: 7px;
      color: var(--pink-deep);
      font-size: 11px;
      letter-spacing: 0.12em;
    }

    .mvp-columns {
      display: grid;
      grid-template-columns: 1.3fr 0.7fr;
      gap: 14px;
      margin-top: 38px;
    }

    .list-box {
      padding: clamp(21px, 3vw, 30px);
      border: 1px solid var(--soft-rule);
    }

    .list-box.secondary {
      background: #faf9f5;
    }

    .list-box h3 {
      margin: 0 0 18px;
      color: var(--green-deep);
      font-size: 19px;
    }

    .feature-list {
      display: flex;
      flex-wrap: wrap;
      gap: 9px;
    }

    .feature-pill {
      padding: 8px 13px;
      border: 1px solid rgba(0, 76, 43, 0.2);
      border-radius: 999px;
      color: var(--green-deep);
      font-size: 13px;
    }

    .split-decision {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
      margin-top: 36px;
    }

    .decision {
      padding: clamp(22px, 3vw, 29px);
      border: 1px solid var(--soft-rule);
    }

    .decision.ai {
      background: var(--green-soft);
    }

    .decision.user {
      background: var(--pink-soft);
    }

    .decision h3 {
      margin: 0 0 16px;
      color: var(--green-deep);
      font-size: 19px;
    }

    .decision p {
      margin: 0;
      color: var(--text);
    }

    .preference-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
    }

    .dimension {
      min-height: 143px;
      padding: 20px;
      border: 1px solid var(--soft-rule);
      border-radius: 14px;
      background: linear-gradient(160deg, var(--white) 0%, var(--green-soft) 100%);
      transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
      position: relative;
      overflow: hidden;
    }
    .dimension::after {
      content: '';
      position: absolute;
      inset: 0;
      opacity: 0;
      background: linear-gradient(160deg, var(--green-soft) 0%, rgba(0, 76, 43, 0.06) 100%);
      transition: opacity 0.35s ease;
      pointer-events: none;
    }
    .dimension:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 36px rgba(8, 107, 230, 0.12);
      border-color: transparent;
    }
    .dimension:hover::after {
      opacity: 1;
    }

    .dimension strong {
      display: block;
      margin-bottom: 9px;
      color: var(--green-deep);
      font-size: 14px;
      position: relative;
      z-index: 1;
    }
    .dimension p {
      margin: 0;
      color: var(--text);
      font-size: 14px;
      position: relative;
      z-index: 1;
    }

    .placeholder-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 13px;
      margin-top: 38px;
    }

    .media-placeholder {
      display: grid;
      min-height: 290px;
      place-items: center;
      padding: 24px;
      border: 1px dashed rgba(0, 76, 43, 0.34);
      background: #fcfbf8;
      text-align: center;
    }

    .media-placeholder.tall {
      min-height: 365px;
    }

    .placeholder-icon {
      display: grid;
      width: 54px;
      height: 54px;
      place-items: center;
      margin: 0 auto 18px;
      border: 1px solid var(--pink);
      border-radius: 50%;
      color: var(--pink-deep);
      font-size: 20px;
      font-weight: 700;
    }

    .media-placeholder strong {
      display: block;
      margin-bottom: 7px;
      color: var(--green-deep);
      font-size: 16px;
    }

    .media-placeholder span {
      color: var(--muted);
      font-size: 13px;
    }

    .image-panel {
      display: grid;
      min-height: 365px;
      place-items: center;
      margin: 0;
      padding: 24px;
      border: 1px solid var(--soft-rule);
      background: transparent;
    }

    .image-panel img {
      display: block;
      max-width: 100%;
      max-height: 520px;
      object-fit: contain;
      filter: drop-shadow(0 18px 20px rgba(8, 107, 230, 0.1));
    }

    .interaction-list {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 12px;
      margin-bottom: 38px;
    }

    .interaction {
      min-height: 168px;
      padding: 20px;
      border-top: 4px solid var(--pink);
      background: var(--white);
      box-shadow: inset 0 0 0 1px var(--soft-rule);
    }

    .interaction h3 {
      margin: 0 0 11px;
      color: var(--green-deep);
      font-size: 18px;
    }

    .interaction p {
      margin: 0;
      color: var(--text);
      font-size: 14px;
    }

    .five-screens {
      display: grid;
      grid-auto-flow: column;
      grid-auto-columns: minmax(128px, 150px);
      gap: 10px;
      overflow-x: auto;
      padding-bottom: 14px;
      scrollbar-color: var(--pink) rgba(8, 107, 230, 0.12);
    }

    .journey-branches {
      display: flex;
      width: 100%;
      align-items: center;
      gap: 16px;
      overflow-x: auto;
      padding: 8px 0 18px;
      scrollbar-color: var(--pink) rgba(8, 107, 230, 0.12);
    }

    .journey-row {
      display: grid;
      grid-auto-flow: column;
      grid-auto-columns: minmax(128px, 150px);
      gap: 12px;
      align-items: start;
      min-width: max-content;
    }

    .journey-start,
    .journey-merge {
      display: grid;
      grid-auto-flow: column;
      grid-auto-columns: minmax(128px, 150px);
      gap: 12px;
      width: max-content;
      align-items: start;
    }

    .branch-connector,
    .merge-connector {
      display: grid;
      width: max-content;
      min-width: 120px;
      grid-template-columns: 1fr;
      align-items: center;
      color: var(--pink-deep);
    }

    .connector-label {
      display: none;
    }

    .connector-lines {
      position: relative;
      height: 156px;
    }

    .connector-lines::before,
    .connector-lines::after {
      content: "";
      position: absolute;
      left: 0;
      width: 116px;
      height: 66px;
      border-color: var(--pink);
      border-style: solid;
    }

    .branch-connector .connector-lines::before {
      top: 14px;
      border-width: 2px 0 0 2px;
      border-top-left-radius: 28px;
    }

    .branch-connector .connector-lines::after {
      bottom: 14px;
      border-width: 0 0 2px 2px;
      border-bottom-left-radius: 28px;
    }

    .merge-connector .connector-lines::before {
      top: 14px;
      border-width: 2px 2px 0 0;
      border-top-right-radius: 28px;
    }

    .merge-connector .connector-lines::after {
      bottom: 14px;
      border-width: 0 2px 2px 0;
      border-bottom-right-radius: 28px;
    }

    .connector-arrow {
      position: absolute;
      top: 50%;
      right: 0;
      display: inline-grid;
      width: 34px;
      height: 34px;
      place-items: center;
      border-radius: 50%;
      color: var(--white);
      background: var(--pink-deep);
      font-size: 18px;
      font-weight: 800;
      transform: translateY(-50%);
    }

    .branch-pair {
      display: grid;
      gap: 14px;
      min-width: max-content;
      align-self: center;
    }

    .journey-branch {
      display: grid;
      grid-template-columns: 22px 1fr;
      gap: 12px;
      min-width: max-content;
      padding: 16px 0;
      border: 0;
    }

    .branch-label {
      position: relative;
      display: block;
      width: 22px;
      min-height: 100%;
      border: 0;
      color: transparent;
      font-size: 0;
    }

    .branch-label::before {
      content: "";
      position: absolute;
      top: 18px;
      bottom: 18px;
      left: 8px;
      width: 18px;
      border: 2px solid var(--pink);
      border-right: 0;
      border-radius: 18px 0 0 18px;
    }

    .branch-title {
      display: none;
    }

    .branch-title span {
      margin-left: 8px;
      color: var(--muted);
      font-weight: 650;
      letter-spacing: 0;
      text-transform: none;
    }

    .branch-screens {
      display: grid;
      grid-auto-flow: column;
      grid-auto-columns: minmax(128px, 150px);
      gap: 12px;
    }

    .merge-label {
      display: inline-flex;
      width: max-content;
      align-items: center;
      gap: 10px;
      color: var(--muted);
      font-size: 13px;
      font-weight: 750;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .merge-label::before,
    .merge-label::after {
      content: "";
      width: 46px;
      border-top: 1px solid var(--soft-rule);
    }

    .screen-placeholder {
      display: grid;
      min-height: clamp(285px, 33vw, 425px);
      align-content: center;
      justify-items: center;
      padding: 12px;
      border: 1px dashed rgba(0, 76, 43, 0.33);
      border-radius: 22px;
      color: var(--muted);
      background: #fcfbf7;
      text-align: center;
      font-size: 12px;
    }

    .screen-placeholder strong {
      display: block;
      margin-top: 9px;
      color: var(--green-deep);
    }

    .screen-shot {
      position: relative;
      z-index: 0;
      display: flex;
      flex-direction: column;
      align-items: center;
      min-height: clamp(285px, 33vw, 425px);
      margin: 0;
      padding: 14px 10px 16px;
      border: 1px solid transparent;
      border-radius: 12px;
      background: transparent;
      text-align: center;
      cursor: zoom-in;
      transition: border-color 0.35s ease, box-shadow 0.35s ease, z-index 0s;
    }
    .screen-shot:hover {
      z-index: 200;
      border-color: var(--pink-soft);
      box-shadow: 0 8px 32px rgba(205, 42, 94, 0.08);
    }

    .screen-shot-media {
      display: flex;
      align-items: center;
      justify-content: center;
      width: min(100%, 155px);
      height: clamp(230px, 27vw, 360px);
      overflow: visible;
      flex-shrink: 0;
    }

    .screen-shot img {
      width: 100%;
      height: 100%;
      object-fit: contain;
      filter: drop-shadow(0 16px 18px rgba(8, 107, 230, 0.14));
      transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
      transform-origin: center center;
    }
    .screen-shot:hover img {
      transform: scale(2);
    }

    .screen-shot strong {
      display: block;
      margin-top: 10px;
      color: var(--green-deep);
      font-size: 13px;
      flex-shrink: 0;
    }

    .screen-shot span {
      color: var(--muted);
      font-size: 11px;
    }

    .implementation {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-bottom: 38px;
    }

    .implemented {
      display: flex;
      gap: 16px;
      align-items: start;
      min-height: 102px;
      padding: 19px;
      border: 1px solid var(--soft-rule);
    }

    .implemented b {
      display: grid;
      flex: 0 0 auto;
      width: 34px;
      height: 34px;
      place-items: center;
      border-radius: 50%;
      color: var(--white);
      background: var(--green);
    }

    .implemented strong {
      display: block;
      color: var(--green-deep);
    }

    .implemented span {
      color: var(--text);
      font-size: 13px;
    }

    .sequence-diagram {
      overflow-x: auto;
      padding-bottom: 8px;
    }

    .sequence-grid {
      position: relative;
      display: grid;
      min-width: 980px;
      grid-template-columns: repeat(6, minmax(135px, 1fr));
      gap: 0;
      border: 1px solid var(--rule);
      background:
        linear-gradient(90deg, transparent calc(100% - 1px), var(--soft-rule) calc(100% - 1px)) 0 0 / calc(100% / 6) 100%,
        var(--white);
    }

    .sequence-persona {
      padding: 18px 12px;
      border-bottom: 1px solid var(--rule);
      color: var(--green-deep);
      text-align: center;
      font-size: 14px;
      font-weight: 800;
    }

    .sequence-lane {
      min-height: 330px;
      padding: 18px 10px 22px;
    }

    .sequence-step {
      position: relative;
      min-height: 54px;
      margin: 0 0 20px;
      padding: 10px 12px;
      border: 1px solid var(--soft-rule);
      background: #fcfbf8;
      color: var(--green-deep);
      font-size: 13px;
      line-height: 1.45;
    }

    .sequence-step.return {
      border-color: rgba(235, 123, 168, 0.45);
      background: var(--pink-soft);
    }

    .sequence-step::after {
      content: "";
      position: absolute;
      top: 50%;
      right: -23px;
      width: 22px;
      border-top: 2px solid var(--pink);
    }

    .sequence-step::before {
      content: "";
      position: absolute;
      top: calc(50% - 4px);
      right: -26px;
      border-top: 5px solid transparent;
      border-bottom: 5px solid transparent;
      border-left: 7px solid var(--pink);
    }

    .sequence-lane:last-child .sequence-step::before,
    .sequence-lane:last-child .sequence-step::after {
      display: none;
    }

    .sequence-caption {
      margin: 18px 0 0;
      color: var(--muted);
      font-size: 13px;
    }

    .sequence-diagram.sequence-map {
      overflow-x: auto;
      padding: 28px 28px 34px;
      border: 1px solid rgba(0, 76, 43, 0.12);
      border-radius: 22px;
      background: #fffefa;
    }

    .sequence-map-inner {
      position: relative;
      min-width: 1160px;
      height: 560px;
    }

    .sequence-map-title {
      display: none;
    }

    .seq-role {
      position: absolute;
      top: 0;
      display: grid;
      width: 148px;
      height: 58px;
      place-items: center;
      border-radius: 8px;
      color: var(--white);
      background: var(--green-deep);
      text-align: center;
      font-size: 15px;
      font-weight: 900;
      line-height: 1.2;
    }

    .seq-lifeline {
      position: absolute;
      top: 74px;
      bottom: 30px;
      width: 1px;
      background: rgba(0, 76, 43, 0.18);
    }

    .seq-msg {
      position: absolute;
      height: 28px;
      color: var(--text);
      font-size: 15px;
      font-weight: 850;
      line-height: 1;
    }

    .seq-msg::before {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      top: 18px;
      border-top: 2px solid var(--green);
    }

    .seq-msg.adjust::before {
      border-top-color: var(--pink);
    }

    .seq-msg::after {
      content: "";
      position: absolute;
      right: -4px;
      top: 14px;
      width: 9px;
      height: 9px;
      background: var(--green);
    }

    .seq-msg.adjust::after {
      background: var(--pink);
    }

    .seq-msg.reverse::after {
      left: -4px;
      right: auto;
    }

    .seq-msg span {
      position: relative;
      z-index: 1;
      display: inline-block;
      padding: 0 8px;
      background: #fffefa;
    }

    .seq-pill {
      position: absolute;
      right: 0;
      bottom: 0;
      min-width: 160px;
      padding: 12px 22px;
      border-radius: 12px;
      color: var(--green-deep);
      background: var(--pink);
      text-align: center;
      font-size: 13px;
      font-weight: 900;
    }

    .video-placeholder {
      display: grid;
      min-height: clamp(310px, 46vw, 480px);
      place-items: center;
      border: 1px dashed rgba(0, 76, 43, 0.35);
      background: linear-gradient(135deg, var(--green-soft), #fff8fb);
      text-align: center;
    }

    .demo-bilibili {
      position: relative;
      width: 100%;
      max-width: 280px;
      margin: 0 auto;
      aspect-ratio: 9 / 16;
      border-radius: 16px;
      overflow: hidden;
      background: #000;
    }

    .demo-bilibili iframe {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      border: 0;
    }

    .play {
      display: grid;
      width: 72px;
      height: 72px;
      place-items: center;
      margin: 0 auto 18px;
      border-radius: 50%;
      color: var(--white);
      background: var(--green);
      font-size: 27px;
    }

    .video-placeholder h3 {
      margin: 0 0 8px;
      color: var(--green-deep);
      font-size: 24px;
    }

    .video-placeholder p {
      max-width: 540px;
      margin: 0 auto 24px;
      color: var(--text);
    }

    .actions {
      display: flex;
      justify-content: center;
      gap: 10px;
    }

    .button {
      display: inline-flex;
      min-height: 43px;
      align-items: center;
      padding: 9px 20px;
      border: 1px solid var(--pink);
      border-radius: 999px;
      color: var(--pink-deep);
      font-size: 13px;
      font-weight: 800;
    }

    .button.primary {
      border-color: var(--green);
      color: var(--white);
      background: var(--green);
    }

    .status-note {
      margin: 0 0 31px;
      padding: 22px 25px;
      border-left: 5px solid var(--pink);
      color: var(--green-deep);
      background: var(--pink-soft);
      font-size: 16px;
      line-height: 1.8;
    }

    .test-table {
      width: 100%;
      border-collapse: collapse;
      table-layout: fixed;
      font-size: 13px;
    }

    .test-table th,
    .test-table td {
      padding: 16px 13px;
      border: 1px solid var(--soft-rule);
      text-align: left;
      vertical-align: top;
    }

    .test-table thead th {
      color: var(--green-deep);
      background: var(--green-soft);
      font-weight: 750;
    }

    .test-table thead th:first-child {
      width: 164px;
    }

    .test-table tbody th {
      color: var(--green-deep);
      background: #faf9f5;
      font-weight: 750;
    }

    .pending {
      color: var(--muted);
    }

    .reflection {
      display: grid;
      grid-template-columns: 0.74fr 1.26fr;
      gap: clamp(30px, 5vw, 76px);
      color: var(--paper);
      background: var(--green-deep);
    }

    .reflection h2 {
      color: var(--paper);
    }

    .reflection-copy p {
      margin: 0 0 22px;
      color: rgba(255, 254, 250, 0.8);
      font-size: 16px;
      line-height: 1.88;
    }

    .reflection-copy p:last-child {
      margin-bottom: 0;
      color: var(--pink);
      font-weight: 650;
    }

    .page-footer {
      display: flex;
      justify-content: space-between;
      gap: 20px;
      padding: 28px var(--pad);
      border-top: 1px solid rgba(255, 254, 250, 0.17);
      color: rgba(255, 254, 250, 0.72);
      background: var(--green-deep);
      font-size: 13px;
    }

    @media (max-width: 1120px) {
      .case-layout {
        display: block;
      }

      .case-index {
        position: sticky;
        top: 68px;
        z-index: 10;
        display: flex;
        min-height: 0;
        overflow-x: auto;
        gap: 22px;
        padding: 14px var(--pad);
        border-right: 0;
        border-bottom: 1px solid var(--rule);
        background: var(--paper);
      }

      .case-index .index-label {
        display: none;
      }

      .case-index nav {
        display: flex;
        gap: 20px;
        white-space: nowrap;
      }

      .case-index a {
        display: block;
      }

      .case-index a span {
        margin-right: 6px;
      }

      .case-section {
        scroll-margin-top: 122px;
      }

      .cards-4,
      .interaction-list,
      .pain-grid,
      .competitor-visual-grid,
      .experience-mini-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .screen-board {
        grid-template-columns: repeat(3, minmax(110px, 1fr));
      }
    }

    @media (max-width: 900px) {
      .case-hero,
      .reflection {
        grid-template-columns: 1fr;
      }

      .hero-copy {
        border-right: 0;
        border-bottom: 1px solid var(--rule);
      }

      .phone-placeholder-group {
        min-height: 450px;
      }

      .cards-3,
      .preference-grid,
      .implementation {
        grid-template-columns: repeat(2, 1fr);
      }

      .mvp-columns,
      .split-decision {
        grid-template-columns: 1fr;
      }

      .solution-row {
        grid-template-columns: 1fr;
      }

      .solution-arrow {
        min-height: 24px;
        transform: rotate(90deg);
      }

      .five-screens {
        grid-auto-columns: minmax(122px, 145px);
      }
    }

    @media (max-width: 620px) {
      .global-header {
        height: 60px;
      }

      .global-nav {
        gap: 15px;
        font-size: 11px;
      }

      .facts,
      .cards-4,
      .cards-3,
      .cards-2,
      .preference-grid,
      .interaction-list,
      .pain-grid,
      .competitor-visual-grid,
      .experience-mini-grid,
      .implementation,
      .placeholder-row {
        grid-template-columns: 1fr;
      }

      .screen-board {
        grid-template-columns: repeat(2, minmax(105px, 1fr));
      }

      .fact:nth-child(odd) {
        border-right: 0;
      }

      .section-head {
        display: block;
      }

      .number {
        display: block;
        margin-bottom: 9px;
      }

      .lead {
        margin-left: 0;
      }

      .flow-node:not(:last-child) {
        border-right: 0;
        border-bottom: 1px solid var(--soft-rule);
      }

      .five-screens {
        grid-auto-columns: minmax(118px, 138px);
      }

      .screen-shot-media {
        width: min(100%, 132px);
        height: clamp(210px, 52vw, 280px);
      }

      .screen-shot img {
        width: 100%;
        height: 100%;
      }
      .screen-shot:hover img {
        transform: none;
      }

      .screen-board .screen-shot-media {
        width: min(100%, 112px);
        height: 224px;
      }

      .test-table {
        min-width: 800px;
      }

      .table-scroll {
        overflow-x: auto;
      }
    }

    @media print {
      .global-header,
      .case-index {
        display: none;
      }

      .case-layout {
        display: block;
      }

      .case-section {
        break-inside: avoid-page;
        page-break-inside: avoid;
      }

      .case-hero {
        min-height: auto;
        break-after: page;
      }

      .page-footer {
        background: transparent;
        color: var(--text);
      }
    }
  

.case-study-page .brand,
.case-study-page h1,
.case-study-page h2,
.case-study-page .section-label,
.case-study-page .chip {
  font-family: var(--font-display);
}

/* ---- Travel case study refinements ---- */
.case-study-page .case-hero {
  min-height: min(720px, 100vh);
}

.case-study-page .hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: clamp(24px, 4vw, 48px);
  padding-bottom: clamp(24px, 4vw, 48px);
}

.case-study-page .hero-media {
  padding-top: clamp(18px, 3vw, 36px);
  padding-bottom: clamp(18px, 3vw, 36px);
}

.case-study-page .summary {
  margin-bottom: 14px;
}

.case-study-page .case-period {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.case-study-page .chips {
  margin-top: 0;
  margin-bottom: 0;
}

.case-study-page #competition .status-note {
  margin-top: 44px;
}

.case-study-page .screen-shot-media {
  align-items: center;
}

.case-study-page .screen-shot img {
  transform-origin: center center;
}

.case-study-page .screen-board .screen-shot img,
.case-study-page .path-group .screen-shot img {
  transform-origin: center center;
}

.case-study-page .dimension strong {
  font-size: 16px;
}

.case-study-page .dimension p {
  font-size: 15px;
  line-height: 1.55;
}

.case-study-page #testing .persona-card {
  background: var(--green) !important;
  border-color: transparent;
  color: #fff;
}

.case-study-page #testing .persona-card h3,
.case-study-page #testing .persona-card p {
  color: #fff;
}

.case-study-page #workflow .card {
  background: var(--green);
  border-color: transparent;
  box-shadow: 0 8px 24px rgba(8, 107, 230, 0.14);
}

.case-study-page #workflow .card h3,
.case-study-page #workflow .card p {
  color: #fff;
}