/* ============================================================
       6. HERO SECTION
       ============================================================ */
    .hero-section {
      position: relative;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: calc(100vh - 88px);
      background: var(--color-hero-bg);
      border-bottom: 1px solid var(--color-border-light);
      overflow: hidden;
    }

    .hero-image {
      position: absolute;
      inset: 0;
      mix-blend-mode: multiply;
      opacity: 0.8;
    }

    .hero-image .placeholder-img {
      width: 100%;
      height: 100%;
      background: #d4d6c4;
    }

    .hero-image .placeholder-img::after {
      content: none;
    }

    /* Decorative phone: its size follows the hero without moving the copy. */
    .hero-phone-stage {
      position: absolute;
      inset: 0;
      z-index: 1;
      pointer-events: none;
      -webkit-mask-image: linear-gradient(to bottom, #000 0%, #000 58%, rgba(0, 0, 0, 0.85) 72%, transparent 100%);
      mask-image: linear-gradient(to bottom, #000 0%, #000 58%, rgba(0, 0, 0, 0.85) 72%, transparent 100%);
    }

    .hero-phone-wrap {
      position: absolute;
      left: 50%;
      top: 6%;
      height: min(132%, 156vw);
      aspect-ratio: 71.9 / 150;
      opacity: 0.34;
      transform: translateX(-50%);
      filter: blur(5px);
      animation: hero-phone-enter 1.8s cubic-bezier(0.16, 0.8, 0.22, 1) both;
    }

    .hero-phone {
      position: absolute;
      inset: 0;
      padding: 1.65%;
      border-radius: 16% / 7.669%;
      background: linear-gradient(130deg, var(--color-border) 0%, var(--color-green-muted) 9%, var(--color-green-dark) 30%, var(--color-green-muted) 85%, var(--color-border) 100%);
      box-shadow: 0 32px 72px rgba(0, 46, 41, 0.16);
      transform: perspective(1600px) rotateY(8deg) rotateZ(4.5deg);
    }

    .hero-phone-screen {
      position: relative;
      width: 100%;
      height: 100%;
      overflow: hidden;
      border-radius: 14.7% / 6.92%;
      background: linear-gradient(155deg, var(--color-bg), var(--color-hero-bg));
    }

    .hero-phone-screen::before {
      content: "";
      position: absolute;
      left: 50%;
      top: 2%;
      width: 16%;
      aspect-ratio: 2.8 / 1;
      border-radius: 999px;
      background: var(--color-green-dark);
      transform: translateX(-50%);
    }

    .hero-phone-screen::after {
      content: "";
      position: absolute;
      left: 50%;
      bottom: 1.5%;
      width: 28%;
      height: 0.6%;
      border-radius: 999px;
      background: var(--color-green-muted);
      transform: translateX(-50%);
    }

    @keyframes hero-phone-enter {
      from {
        opacity: 0;
        transform: translate(-50%, 24px) scale(1.025);
      }
      to {
        opacity: 0.34;
        transform: translate(-50%, 0) scale(1);
      }
    }

    @media (prefers-reduced-motion: reduce) {
      .hero-phone-wrap {
        animation: none;
      }
    }

    @media print {
      .hero-phone-wrap {
        animation: none;
      }
    }

    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 24px;
      padding: 48px var(--gutter);
      width: 100%;
      max-width: 1400px;
      text-align: center;
    }

    .hero-heading {
      font-family: var(--font-serif);
      font-weight: 500;
      font-size: clamp(44px, 4.3vw, 64px);
      line-height: 1.08;
      letter-spacing: -0.02em;
      color: var(--color-green-dark);
      max-width: 1240px;
      text-wrap: balance;
    }

    .hero-heading > span,
    .hero-subheadline > span {
      display: block;
    }

    html[lang="ja"] .hero-content {
      padding-inline: 24px;
    }

    html[lang="ja"] .hero-heading {
      font-size: clamp(30px, 3vw, 40px);
      line-height: 1.4;
      font-weight: 600;
      max-width: none;
    }

    html[lang="ja"] .hero-heading-ending,
    html[lang="ja"] .hero-subheadline-ending {
      white-space: nowrap;
    }

    .hero-subheadline {
      font-family: var(--font-sans);
      font-weight: 400;
      font-size: 1.125rem;
      line-height: 1.62;
      color: var(--color-green-dark);
      max-width: 960px;
      text-wrap: balance;
    }

    .hero-cta {
      margin-top: 12px;
    }

    .hero-microcopy {
      font-family: var(--font-sans);
      font-weight: 400;
      font-size: 0.75rem;
      line-height: 1.5;
      color: var(--color-green-muted);
      opacity: 0.75;
    }

    /* ============================================================
       7. EDITORIAL INTRO
       ============================================================ */
    .intro-section {
      display: flex;
      align-items: baseline;
      padding: var(--section-pad-y) var(--gutter);
      border-bottom: 1px solid var(--color-border-light);
      gap: 0;
    }

    .landing-page > .intro-section {
      padding-inline: max(var(--gutter), calc((100% - var(--max-width)) / 2));
    }

    .intro-heading-col {
      flex: 0 0 auto;
      padding-right: 24px;
      padding-bottom: 0;
      border-right: 1px solid var(--color-border-light);
    }

    .intro-heading-col .heading-2 {
      max-width: 322px;
    }

    .intro-body-col {
      flex: 1 1 auto;
      min-width: 0;
      padding-left: 80px;
    }

    .intro-body-col .heading-3 {
      font-size: clamp(1.375rem, 1.75vw, 1.625rem);
      line-height: 1.28;
      color: var(--color-green-dark);
      max-width: 720px;
      margin-bottom: 12px;
    }

    .intro-body-col p {
      font-family: var(--font-sans);
      font-weight: 400;
      font-size: 1.125rem;
      line-height: 1.62;
      color: var(--color-green-dark);
      max-width: 760px;
    }

    html[lang="en"] .intro-body-col p {
      max-width: none;
      margin: 0;
      font-size: 1.0625rem;
      letter-spacing: -0.012em;
    }

    html[lang="en"] .intro-heading-col {
      flex-basis: 347px;
      box-sizing: border-box;
    }

    html[lang="ja"] .intro-heading-col .heading-2 {
      font-size: clamp(1.5rem, 2.3vw, 1.875rem);
    }

    html[lang="ja"] .intro-heading-col {
      flex-basis: 347px;
      box-sizing: border-box;
    }

    /* ============================================================
       8. FEATURES (TICKET CARDS) — DARK SECTION
       ============================================================ */
    .features-section {
      background: var(--color-green-dark);
      padding: var(--section-pad-y) var(--gutter);
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 40px;
    }

    .features-section .heading-2 {
      color: var(--color-text-light);
      text-align: center;
      align-self: center;
      max-width: 760px;
      white-space: pre-line;
    }

    html[lang="ja"] .features-section .heading-2 {
      max-width: 480px;
      white-space: pre-line;
    }

    .features-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 0;
      width: 100%;
    }

    .feature-card {
      position: relative;
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      padding: 40px;
      gap: 8px;
      min-height: 440px;
    }

    .feature-card-icon {
      width: 44px;
      height: 44px;
      flex: 0 0 auto;
      color: var(--color-text-light);
      margin-bottom: 8px;
    }

    .feature-card-icon svg {
      display: block;
      width: 100%;
      height: 100%;
      fill: none;
      stroke: currentColor;
      stroke-width: 1.7;
      stroke-linecap: round;
      stroke-linejoin: round;
    }

    .feature-card .heading-3 {
      color: var(--color-text-light);
      max-width: 230px;
      font-size: clamp(1.375rem, 1.75vw, 1.625rem);
      line-height: 1.28;
      white-space: pre-line;
      min-height: 2.56em; /* 2 lines: one-line titles keep bullet lists aligned */
    }

    .feature-card ul {
      margin: 16px 0 0;
      padding: 0;
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .feature-card li {
      font-family: var(--font-sans);
      font-weight: 400;
      font-size: 1rem;
      line-height: 1.5;
      color: var(--color-text-light);
      opacity: 0.9;
      max-width: 200px;
      padding-left: 16px;
      position: relative;
    }

    .feature-card li::before {
      content: "";
      position: absolute;
      left: 0;
      top: 0.55em;
      width: 6px;
      height: 6px;
      background: var(--color-accent);
    }

    /* ============================================================
       9. SERVICES PREVIEW
       ============================================================ */
    .services-section {
      padding: var(--section-pad-y) var(--gutter);
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 40px;
      border-top: 1px solid var(--color-border-light);
    }

    .services-header {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
      width: 100%;
      text-align: center;
    }

    .services-header .heading-2 {
      max-width: 560px;
    }

    .services-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 0;
      width: 100%;
    }

    .service-card {
      position: relative;
      height: 400px;
      border: 1px solid var(--color-border);
      overflow: hidden;
    }

    .service-card .placeholder-img {
      width: 100%;
      height: 100%;
    }

    .service-card-overlay {
      position: absolute;
      inset: 1px;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      align-items: flex-start;
      padding: 40px;
      gap: 0;
      background: linear-gradient(0deg, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.2) 50%, rgba(0,0,0,0) 100%);
      pointer-events: none;
    }

    .service-card-overlay .heading-3 {
      color: var(--color-text-light);
      margin-bottom: 4px;
    }

    .service-card-overlay p {
      font-family: var(--font-sans);
      font-weight: 400;
      font-size: 1rem;
      line-height: 1.5;
      color: var(--color-text-muted);
      max-width: 420px;
    }

    @media (min-width: 768px) {
      @supports (grid-template-rows: subgrid) {
        .services-grid {
          height: 400px;
          grid-template-rows: minmax(0, 1fr) auto auto;
        }

        .service-card {
          display: grid;
          height: auto;
          grid-row: span 3;
          grid-template-rows: subgrid;
        }

        .service-card .placeholder-img {
          position: absolute;
          inset: 0;
        }

        .service-card-overlay {
          position: relative;
          inset: auto;
          grid-row: 1 / -1;
          display: grid;
          grid-template-rows: subgrid;
          align-items: start;
          justify-content: normal;
          justify-items: start;
        }

        .service-card-overlay .heading-3 {
          grid-row: 2;
        }

        .service-card-overlay p {
          grid-row: 3;
        }
      }
    }

    .service-badge {
      position: absolute;
      top: 17px;
      left: 17px;
      z-index: 2;
      padding: 8px 24px;
      background: var(--color-overlay);
      backdrop-filter: blur(2px);
      -webkit-backdrop-filter: blur(2px);
      font-family: var(--font-serif);
      font-weight: 500;
      font-size: clamp(1.25rem, 2vw, 2rem);
      line-height: 1.3;
      color: var(--color-text-light);
    }

    /* Fill the service card. The overlay supplies the bottom contrast. */
    .service-card--line {
      background: #96add5;
    }

    .service-card--line .line-chat {
      position: absolute;
      inset: 0;
      height: 100%;
      overflow: hidden;
    }

    .line-chat {
      --chat-blue: #96add5;
      --chat-green: #78e579;
      --chat-ink: #171c1b;
      --chat-meta: #24394d;
      font-family: var(--font-sans);
      font-size: 14px;
      line-height: 1.5;
      color: var(--chat-ink);
      background: var(--chat-blue);
      width: 100%;
      min-width: 0;
    }

    .line-chat p {
      font-size: inherit;
      line-height: inherit;
      overflow-wrap: normal;
      word-break: normal;
      line-break: strict;
      text-wrap: pretty;
    }

    .line-chat-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 12px 20px;
      background: #fff;
    }

    .line-chat-header strong {
      display: block;
      font-size: 18px;
      font-weight: 700;
      line-height: 1.3;
    }

    .line-chat-header > div > span {
      display: block;
      font-size: 10px;
      margin-top: 2px;
      color: #5269ca;
    }

    .line-chat-header-icons {
      display: flex;
      flex: 0 0 auto;
      gap: 18px;
    }

    .line-chat svg {
      width: 20px;
      height: 20px;
      flex: 0 0 auto;
      stroke: currentColor;
      stroke-width: 1.6;
      stroke-linecap: round;
      stroke-linejoin: round;
      fill: none;
    }

    .line-chat-thread {
      display: flex;
      flex-direction: column;
      gap: 14px;
      padding: 14px 20px 22px;
    }

    .line-chat-date {
      align-self: center;
      padding: 3px 14px;
      border-radius: 30px;
      color: #152e46;
      background: rgba(53, 83, 130, 0.17);
      font-size: 10px;
    }

    .line-chat-header,
    .line-chat-date {
      display: none;
    }

    .line-chat-message {
      display: flex;
      align-items: flex-end;
      gap: 7px;
      min-width: 0;
    }

    .line-chat-message--outgoing {
      justify-content: flex-end;
      padding-left: 42px;
    }

    .line-chat-bubble {
      position: relative;
      padding: 10px 13px;
      border-radius: 16px;
      background: #fff;
      min-width: 0;
      max-width: 100%;
    }

    .line-chat-bubble::before {
      content: "";
      position: absolute;
      top: 6px;
      left: -6px;
      width: 12px;
      height: 12px;
      background: inherit;
      clip-path: polygon(0 0, 100% 20%, 100% 100%);
    }

    .line-chat-message--outgoing .line-chat-bubble {
      background: var(--chat-green);
    }

    .line-chat-message--outgoing .line-chat-bubble::before {
      left: auto;
      right: -6px;
      transform: scaleX(-1);
    }

    .line-chat-mention {
      display: block;
      color: #00569a;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 2px;
    }

    .line-chat-time {
      display: flex;
      flex-direction: column;
      flex: 0 0 auto;
      font-family: var(--font-sans);
      font-size: 9px;
      line-height: 1.35;
      color: var(--chat-meta);
      margin-bottom: 2px;
      white-space: nowrap;
    }

    .line-chat-message--outgoing .line-chat-time {
      text-align: right;
    }

    .line-chat-avatar {
      display: grid;
      place-items: center;
      align-self: flex-start;
      width: 28px;
      height: 28px;
      margin-top: 2px;
      flex: 0 0 auto;
      border: 1px solid #fff;
      border-radius: 50%;
      background: #d5edef;
      color: #38687b;
      font-weight: 700;
    }

    .line-chat-avatar--agent {
      background: #fff;
    }

    .line-chat-avatar img {
      width: 24px;
      height: 24px;
    }

    .line-chat-reply {
      min-width: 0;
      max-width: calc(100% - 68px);
    }

    .line-chat-name {
      display: block;
      margin-bottom: 4px;
      font-size: 10px;
      line-height: 1.3;
      color: var(--chat-meta);
    }

    .line-chat-memo {
      display: inline-block;
      padding: 2px 5px;
      margin-bottom: 6px;
      border-radius: 3px;
      background: #eaf3ea;
      color: #366451;
      font-size: 10px;
      line-height: 1.4;
    }

    .line-chat-note {
      display: flex;
      flex-direction: column;
      gap: 5px;
      margin-top: 9px;
      padding: 10px 12px 0;
      overflow: hidden;
      border: 1px solid #dce6dd;
      border-radius: 7px;
      color: var(--color-green-dark);
      background: #f4f8f1;
    }

    .line-chat-note > span,
    .line-chat-note > p {
      color: #536f5b;
      font-size: 10px;
      line-height: 1.5;
    }

    .line-chat-note > strong {
      font-size: 17px;
      font-weight: 700;
      line-height: 1.3;
      white-space: nowrap;
    }

    .line-chat-note-footer {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      margin: 5px -12px 0;
      padding: 8px 12px;
      border-top: 1px solid #dce6dd;
      background: #e9f1e5;
      font-size: 10px;
    }

    .line-chat-composer {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 9px 16px;
      background: #fff;
    }

    .line-chat-input {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex: 1;
      min-width: 0;
      height: 28px;
      padding: 0 10px;
      border-radius: 18px;
      border: 1px solid #eee;
      background: #f6f6f6;
      color: #b4b8b7;
    }

    .line-chat-input svg {
      width: 17px;
      height: 17px;
      color: #777;
    }

    @media (max-width: 1024px) {
      .line-chat {
        font-size: 13px;
      }

      .line-chat-header {
        padding-inline: 14px;
      }

      .line-chat-thread {
        padding-inline: 12px;
      }

      .line-chat-message--outgoing {
        padding-left: 24px;
      }

      .line-chat-bubble {
        padding: 9px 11px;
      }

      .line-chat-note > strong {
        font-size: 15px;
      }
    }

    @media (max-width: 360px) {
      .line-chat {
        font-size: 12px;
      }

      .line-chat-thread {
        gap: 12px;
      }

      .line-chat-composer {
        gap: 9px;
        padding-inline: 12px;
      }
    }