:root {
    --bg: #f7f8fc;
    --surface: #ffffff;
    --tint: #f3f1ff;
    --line: #e5e8f2;
    --text: #1b2337;
    --text-dim: #5c6579;
    --violet: #6c5ce7;
    --violet-deep: #4f46b8;
    --violet-soft: #edeafd;
    --coral: #ff6b4a;
    --coral-deep: #f04f74;
    --green: #14b87a;
    --green-soft: #e5f8f0;
    --blue: #2f9de4;
    --blue-soft: #e7f4fd;
    --amber: #d97706;
    --dc-bg: #313338;
    --dc-panel: #2b2d31;
    --dc-embed: #232428;
    --radius: 16px;
    --shadow: 0 2px 6px rgba(27,35,55,.05), 0 12px 32px rgba(27,35,55,.07);
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  .svg-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
  .icon-svg { width: 1.35em; height: 1.35em; flex: 0 0 auto; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; vertical-align: -.24em; }
  body {
    background: var(--bg);
    color: var(--text);
    font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Meiryo", sans-serif;
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
  }
  .wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
  section { padding: 96px 0; }
  h2 { font-size: 34px; line-height: 1.45; letter-spacing: .01em; margin-bottom: 16px; font-weight: 800; }
  .lead { color: var(--text-dim); font-size: 16px; max-width: 640px; }
  .center { text-align: center; }
  .center .lead { margin: 0 auto; }
  .alt { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

  /* ---------- CTA ---------- */
  .cta {
    display: inline-flex; align-items: center; gap: 10px;
    background: linear-gradient(135deg, var(--coral), var(--coral-deep));
    color: #fff; font-weight: 700; font-size: 17px;
    padding: 18px 36px; border-radius: 999px; text-decoration: none;
    box-shadow: 0 10px 28px rgba(255,107,74,.32);
    transition: transform .15s ease, box-shadow .15s ease;
  }
  .cta:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(255,107,74,.4); }
  .cta-note { display: block; margin-top: 12px; font-size: 13px; color: var(--text-dim); }

  /* ---------- Header ---------- */
  header {
    position: sticky; top: 0; z-index: 50;
    background: rgba(255,255,255,.88); backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
  }
  .nav { display: flex; align-items: center; justify-content: space-between; height: 66px; }
  .logo { display: flex; align-items: center; gap: 9px; font-weight: 800; font-size: 21px; letter-spacing: .02em; color: var(--text); }
  .logo .tick {
    width: 28px; height: 28px; border-radius: 9px; display: grid; place-items: center;
    background: linear-gradient(135deg, var(--violet), #9184f0); color: #fff; font-size: 15px;
    box-shadow: 0 4px 12px rgba(108,92,231,.35);
  }
  .logo small { font-size: 11px; color: var(--text-dim); font-weight: 500; margin-left: 2px; }
  .nav .cta { padding: 11px 24px; font-size: 14px; box-shadow: 0 6px 16px rgba(255,107,74,.28); }

  /* ---------- Hero ---------- */
  .hero {
    padding: 84px 0 96px; position: relative; overflow: hidden;
    background: var(--surface) url("../assets/hero-bg.webp") center / cover no-repeat;
    border-bottom: 1px solid var(--line);
  }
  .hero::before {
    content: ""; position: absolute; inset: 0; pointer-events: none;
    background: linear-gradient(180deg, rgba(255,255,255,.28), rgba(255,255,255,0) 55%);
  }
  .hero-grid { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
  .badge-limit {
    display: inline-flex; align-items: center; gap: 8px;
    background: var(--violet-soft); color: var(--violet-deep); border: 1px solid #d8d2f8;
    font-size: 13px; font-weight: 700; padding: 7px 16px; border-radius: 999px; margin-bottom: 26px;
  }
  .badge-limit .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--coral); }
  h1 { font-size: 46px; line-height: 1.4; letter-spacing: .01em; font-weight: 800; }
  h1 .em { background: linear-gradient(120deg, var(--violet), var(--coral)); -webkit-background-clip: text; background-clip: text; color: transparent; }
  .hero .sub { margin: 24px 0 38px; color: var(--text-dim); font-size: 16.5px; max-width: 480px; }

  /* ---------- Discord mock（実物感のためダークのまま） ---------- */
  .discord {
    background: var(--dc-bg); border-radius: 14px; overflow: hidden;
    box-shadow: 0 8px 24px rgba(27,35,55,.12), 0 32px 72px rgba(27,35,55,.18);
    font-size: 13.5px;
  }
  .dc-head { background: var(--dc-panel); padding: 11px 16px; display: flex; align-items: center; gap: 8px; border-bottom: 1px solid #26272b; color: #dbdee1; font-weight: 700; }
  .dc-head .hash { color: #80848e; font-weight: 400; }
  .dc-body { padding: 16px; display: flex; flex-direction: column; gap: 14px; }
  .dc-msg { display: flex; gap: 10px; }
  .dc-av { width: 34px; height: 34px; border-radius: 50%; flex-shrink: 0; display: grid; place-items: center; font-size: 15px; }
  .dc-av.user { background: #5865f2; }
  .dc-av.bot { background: linear-gradient(135deg, var(--violet), #9184f0); }
  .dc-name { font-weight: 700; color: #f2f3f5; font-size: 13px; }
  .dc-name .bot-tag { background: #5865f2; color: #fff; font-size: 9.5px; padding: 1px 5px; border-radius: 4px; margin-left: 6px; vertical-align: 1px; }
  .dc-name .dc-time { color: #80848e; font-weight: 400; font-size: 11px; margin-left: 6px; }
  .dc-content { flex: 1; min-width: 0; }
  .dc-text { color: #dbdee1; }
  .dc-text a { color: #00a8fc; text-decoration: none; }
  .dc-embed {
    background: var(--dc-embed); border-left: 3px solid var(--violet);
    border-radius: 6px; padding: 12px 14px; margin-top: 8px; color: #dbdee1;
  }
  .dc-embed .ttl { font-weight: 700; color: #b1a6f5; font-size: 12.5px; margin-bottom: 6px; }
  .dc-embed ul { list-style: none; }
  .dc-embed li { padding-left: 14px; position: relative; margin: 3px 0; font-size: 12.5px; color: #b5bac1; }
  .dc-embed li::before { content: "・"; position: absolute; left: 0; color: #6d6f78; }
  .dc-card {
    background: var(--dc-embed); border-radius: 8px; padding: 12px 14px; margin-top: 8px;
    border: 1px solid #3a3c42; position: relative;
  }
  .dc-card .role { font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 4px; display: inline-block; margin-bottom: 6px; }
  .dc-card .role.thanks { background: rgba(59,214,126,.15); color: #3bd67e; }
  .dc-card .role.ask { background: rgba(0,168,252,.15); color: #4fc3ff; }
  .dc-card .role.empathy { background: rgba(255,122,89,.18); color: #ff9576; }
  .dc-card p { font-size: 12.5px; color: #dbdee1; }
  .dc-card .best {
    position: absolute; top: 10px; right: 12px; font-size: 10px; font-weight: 700;
    color: #ffd166; border: 1px solid rgba(255,209,102,.45); padding: 1px 7px; border-radius: 999px;
  }
  .dc-input { background: #383a40; margin: 4px 16px 16px; border-radius: 8px; padding: 11px 14px; color: #87909f; font-size: 13px; }

  /* ---------- ライト用ロールタグ ---------- */
  .role { font-size: 11px; font-weight: 700; padding: 3px 10px; border-radius: 5px; display: inline-block; }
  .role.thanks { background: var(--green-soft); color: #0d9668; }
  .role.ask { background: var(--blue-soft); color: #1d7fc0; }
  .role.empathy { background: #ffefe9; color: #e2532f; }

  /* ---------- Pain ---------- */
  .pain-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
  .pain {
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
    padding: 30px 28px; box-shadow: var(--shadow); text-align: left;
  }
  .pain .mark { color: var(--violet); font-size: 28px; display: block; margin-bottom: 12px; }
  .pain b { display: block; font-size: 17px; margin-bottom: 8px; }
  .pain span { color: var(--text-dim); font-size: 14px; }

  /* ---------- Steps ---------- */
  .steps { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 16px; align-items: stretch; margin-top: 56px; }
  .step {
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
    padding: 34px 26px; text-align: center; box-shadow: var(--shadow);
  }
  .step .num {
    width: 40px; height: 40px; margin: 0 auto 16px; border-radius: 50%;
    background: var(--violet-soft); color: var(--violet-deep); font-weight: 800; display: grid; place-items: center; font-size: 17px;
  }
  .step .icon { color: var(--violet); font-size: 36px; display: block; margin-bottom: 12px; }
  .step b { font-size: 20px; display: block; margin-bottom: 8px; }
  .step span { color: var(--text-dim); font-size: 13.5px; }
  .step .shield { display: inline-flex; align-items: center; gap: 6px; margin-top: 14px; font-size: 12px; color: #0d9668; background: var(--green-soft); padding: 5px 12px; border-radius: 999px; font-weight: 700; }
  .arrow { align-self: center; color: #b9c0d2; font-size: 24px; }

  /* ---------- Proof ---------- */
  .tabs { display: flex; gap: 10px; justify-content: center; margin-top: 40px; flex-wrap: wrap; }
  .tab {
    padding: 11px 28px; border-radius: 999px; border: 1px solid var(--line);
    background: var(--surface); color: var(--text-dim); font-weight: 700; font-size: 14.5px;
    cursor: pointer; font-family: inherit; transition: all .15s ease;
  }
  .tab:hover { border-color: var(--violet); color: var(--violet-deep); }
  .tab.active { background: var(--violet); border-color: var(--violet); color: #fff; box-shadow: 0 6px 18px rgba(108,92,231,.3); }
  .proof-panel { display: none; }
  .proof-panel.active { display: block; }
  .proof-note { font-size: 12.5px; color: var(--text-dim); margin-top: 16px; }
  .proof-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 28px; margin-top: 48px; align-items: start; }
  .report {
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow);
  }
  .report h3 { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--violet-deep); margin-bottom: 12px; letter-spacing: .04em; }
  .report dl { font-size: 13.5px; }
  .report dt { color: var(--text-dim); font-size: 12px; margin-top: 12px; }
  .report dd { color: var(--text); }
  .proof-cards { display: flex; flex-direction: column; gap: 14px; }
  .pcard {
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; position: relative; box-shadow: var(--shadow); text-align: left;
  }
  .pcard .role { margin-bottom: 10px; }
  .pcard p { font-size: 15px; }
  .pcard .why { display: flex; align-items: flex-start; gap: 6px; margin-top: 12px; font-size: 12.5px; color: var(--text-dim); border-top: 1px dashed var(--line); padding-top: 10px; }
  .pcard .why .icon-svg { color: var(--amber); margin-top: 1px; }
  .pcard .best { position: absolute; top: 18px; right: 20px; display: inline-flex; align-items: center; gap: 4px; font-size: 11px; font-weight: 700; color: #92400e; background: #fdf3e3; padding: 3px 10px; border-radius: 999px; }
  .best .icon-star { width: 1em; height: 1em; }

  /* ---------- Features ---------- */
  .feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
  .feat {
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 34px 30px; box-shadow: var(--shadow); text-align: left;
  }
  .feat .icon { width: 54px; height: 54px; border-radius: 15px; display: grid; place-items: center; color: var(--violet-deep); font-size: 26px; margin-bottom: 18px; }
  .feat:nth-child(1) .icon { background: var(--green-soft); }
  .feat:nth-child(2) .icon { background: var(--blue-soft); }
  .feat:nth-child(3) .icon { background: var(--violet-soft); }
  .feat b { font-size: 19px; display: block; margin-bottom: 10px; }
  .feat p { color: var(--text-dim); font-size: 14px; }

  /* ---------- Safety ---------- */
  .safety { background: linear-gradient(180deg, var(--tint), #faf9ff); border-top: 1px solid #e6e1fb; border-bottom: 1px solid #e6e1fb; }
  .safety-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
  .hitl { display: flex; flex-direction: column; }
  .hitl-row { display: flex; align-items: center; gap: 16px; }
  .hitl-box {
    flex: 1; background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
    padding: 18px 22px; font-size: 14.5px; box-shadow: var(--shadow);
  }
  .hitl-box b { display: block; font-size: 15.5px; }
  .hitl-box span { color: var(--text-dim); font-size: 12.5px; }
  .hitl-who { width: 76px; text-align: center; font-size: 12px; font-weight: 800; }
  .hitl-who.ai { color: var(--violet-deep); }
  .hitl-who.human { color: var(--coral); }
  .hitl-v { text-align: center; color: #b9c0d2; font-size: 18px; padding: 6px 0; margin-left: 76px; }
  .quote { font-size: 27px; font-weight: 800; line-height: 1.6; }
  .quote .small { display: block; font-size: 15px; font-weight: 400; color: var(--text-dim); margin-top: 18px; }

  /* ---------- Use cases ---------- */
  .uc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
  .uc { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 28px; box-shadow: var(--shadow); text-align: left; }
  .uc-image { display: block; width: calc(100% + 56px); height: auto; aspect-ratio: 1; object-fit: cover; margin: -30px -28px 24px; border-radius: var(--radius) var(--radius) 0 0; border-bottom: 1px solid var(--line); }
  .uc .tag { font-size: 12px; color: var(--violet-deep); font-weight: 700; background: var(--violet-soft); padding: 3px 12px; border-radius: 999px; }
  .uc b { display: block; font-size: 17px; margin: 14px 0 10px; }
  .uc p { color: var(--text-dim); font-size: 13.5px; }
  .tab { display: inline-flex; align-items: center; justify-content: center; gap: 8px; }
  .uc-note { text-align: center; margin-top: 26px; font-size: 12.5px; color: var(--text-dim); }

  /* ---------- Flow ---------- */
  .flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 48px; counter-reset: fl; }
  .fl { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 22px; counter-increment: fl; box-shadow: var(--shadow); text-align: left; }
  .fl::before { content: "0" counter(fl); font-size: 13px; font-weight: 800; color: var(--violet); display: block; margin-bottom: 10px; }
  .fl b { display: block; font-size: 16px; margin-bottom: 6px; }
  .fl span { color: var(--text-dim); font-size: 12.5px; }
  .flow-note { text-align: center; margin-top: 24px; font-size: 14px; color: #0d9668; font-weight: 700; }

  /* ---------- Pricing ---------- */
  .plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 52px; }
  .plan {
    background: var(--surface); border: 1px solid var(--line); border-radius: 20px; padding: 36px 32px; position: relative;
    display: flex; flex-direction: column; box-shadow: var(--shadow); text-align: left;
  }
  .plan.hot { border-color: var(--violet); box-shadow: 0 0 0 1px var(--violet), 0 20px 52px rgba(108,92,231,.16); }
  .plan .pop {
    position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
    background: linear-gradient(135deg, var(--violet), #9184f0); color: #fff;
    font-size: 12px; font-weight: 700; padding: 5px 18px; border-radius: 999px; white-space: nowrap;
    box-shadow: 0 6px 16px rgba(108,92,231,.35);
  }
  .plan .name { font-size: 15px; font-weight: 700; color: var(--text-dim); }
  .plan .price { font-size: 38px; font-weight: 800; margin: 10px 0 2px; }
  .plan .price small { font-size: 14px; font-weight: 500; color: var(--text-dim); }
  .plan .per { font-size: 12.5px; color: var(--text-dim); margin-bottom: 20px; }
  .plan ul { list-style: none; margin: 0 0 28px; flex: 1; }
  .plan li { padding: 9px 0 9px 26px; position: relative; font-size: 14px; border-bottom: 1px solid var(--line); }
  .plan li::before { content: "✓"; position: absolute; left: 2px; color: var(--green); font-weight: 700; }
  .plan .cta { justify-content: center; width: 100%; font-size: 15px; padding: 14px 0; }
  .plan.quiet .cta { background: var(--surface); color: var(--violet-deep); box-shadow: none; border: 2px solid var(--violet); }
  .plan.quiet .cta:hover { background: var(--violet-soft); }
  .plan .mini { margin-top: 12px; font-size: 12px; color: var(--text-dim); text-align: center; }
  .price-notes { margin-top: 30px; font-size: 12.5px; color: var(--text-dim); text-align: center; }
  .price-notes span { margin: 0 10px; }

  /* ---------- FAQ ---------- */
  .faq { max-width: 760px; margin: 48px auto 0; }
  .faq details {
    background: var(--surface); border: 1px solid var(--line); border-radius: 14px; margin-bottom: 12px; overflow: hidden; box-shadow: var(--shadow); text-align: left;
  }
  .faq summary {
    cursor: pointer; padding: 20px 24px; font-weight: 700; font-size: 15.5px; list-style: none; position: relative; padding-right: 48px;
  }
  .faq summary::after { content: "＋"; position: absolute; right: 22px; top: 50%; transform: translateY(-50%); color: var(--violet); font-size: 18px; }
  .faq details[open] summary::after { content: "−"; }
  .faq .a { padding: 0 24px 20px; color: var(--text-dim); font-size: 14px; }

  /* ---------- Final ---------- */
  .final { text-align: center; padding: 120px 0; position: relative; overflow: hidden; background: var(--surface); border-top: 1px solid var(--line); }
  .final::before {
    content: ""; position: absolute; inset: 0; pointer-events: none;
    background:
      radial-gradient(560px 380px at 30% 100%, rgba(108,92,231,.09), transparent 70%),
      radial-gradient(520px 360px at 75% 0%, rgba(255,107,74,.07), transparent 70%);
  }
  .final .concept {
    position: relative; width: 240px; border-radius: 24px; margin-bottom: 30px;
    box-shadow: 0 10px 32px rgba(27,35,55,.12);
  }
  .final h2 { font-size: 38px; position: relative; }
  .final .lead { margin: 16px auto 40px; position: relative; }
  .final .cta { position: relative; }

  footer { padding: 40px 0; font-size: 12.5px; color: var(--text-dim); }
  .foot { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
  .foot a { color: var(--text-dim); text-decoration: none; margin-left: 20px; }
  .foot a:hover { color: var(--violet-deep); }

  .sec-label { font-size: 13px; font-weight: 800; letter-spacing: .14em; color: var(--violet); margin-bottom: 14px; }

  @media (max-width: 880px) {
    h1 { font-size: 32px; }
    h2 { font-size: 26px; }
    .hero-grid, .proof-grid, .safety-grid { grid-template-columns: 1fr; }
    .pain-cards, .feat-grid, .uc-grid, .plans { grid-template-columns: 1fr; }
    .steps { grid-template-columns: 1fr; }
    .arrow { transform: rotate(90deg); margin: 0 auto; }
    .flow { grid-template-columns: 1fr 1fr; }
  }

  :focus-visible { outline: 3px solid var(--coral); outline-offset: 3px; }
  [hidden] { display: none !important; }
  .pain, .step, .pcard, .feat, .uc, .fl, .plan, .faq details { transition: transform .2s ease, box-shadow .2s ease; }
  .pain:hover, .step:hover, .pcard:hover, .feat:hover, .uc:hover, .fl:hover, .plan:hover, .faq details:hover { transform: translateY(-4px); }
  .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
  .reveal.is-visible { opacity: 1; transform: none; }
  .final .cta { animation: cta-pulse 3s ease-in-out infinite; }
  @keyframes cta-pulse { 50% { box-shadow: 0 12px 34px rgba(255,107,74,.46); } }

  @media (max-width: 600px) {
    .wrap { padding: 0 18px; }
    section { padding: 68px 0; }
    .nav { height: 60px; }
    .logo { font-size: 17px; }
    .logo small { display: none; }
    .nav .cta { min-height: 44px; padding: 10px 15px; font-size: 12px; }
    .hero { padding: 56px 0 72px; }
    .hero-grid { gap: 40px; }
    h1 { font-size: clamp(29px, 9vw, 36px); line-height: 1.45; }
    h2, .final h2 { font-size: 25px; }
    .hero .sub { font-size: 15px; }
    .cta { min-height: 52px; width: 100%; justify-content: center; padding: 15px 18px; font-size: 15px; text-align: center; }
    .badge-limit { font-size: 12px; padding: 7px 12px; }
    .discord { font-size: 12px; }
    .dc-body { padding: 13px; }
    .dc-input { margin: 4px 13px 13px; }
    .pain-cards, .feat-grid, .uc-grid, .plans { margin-top: 34px; }
    .pain, .feat, .uc, .plan { padding: 26px 22px; }
    .uc-image { width: calc(100% + 44px); margin: -26px -22px 22px; }
    .tabs { display: grid; grid-template-columns: 1fr; gap: 8px; }
    .tab { min-height: 44px; width: 100%; }
    .report, .pcard { padding: 22px 18px; }
    .pcard .best { position: static; display: inline-block; margin-bottom: 8px; }
    .safety-grid { gap: 36px; }
    .hitl-row { gap: 10px; }
    .hitl-who { width: 54px; }
    .hitl-v { margin-left: 54px; }
    .flow { grid-template-columns: 1fr; }
    .faq summary { min-height: 60px; padding-left: 18px; }
    .faq .a { padding-left: 18px; padding-right: 18px; }
    .final { padding: 84px 0; }
    .foot { flex-direction: column; align-items: flex-start; }
    .foot a { display: block; min-height: 44px; margin: 0; padding: 11px 0; }
  }

  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
    .reveal { opacity: 1; transform: none; }
  }