.feature-page-shell > .site-header { width:min(1080px, 100%); margin:0 auto; }
    .feature-page-main { display:grid; gap:42px; }
    .messenger-hero { display:grid; gap:24px; padding-top:18px; }
    .messenger-hero-copy { max-width:860px; margin:0 auto; text-align:center; }
    .messenger-hero-copy h1 { margin:0; font-size:clamp(42px, 5.8vw, 76px); line-height:1.02; letter-spacing:-0.055em; }
    .messenger-hero-copy p { max-width:760px; margin:18px auto 0; color:var(--muted); font-size:clamp(17px, 2vw, 21px); line-height:1.75; }
    .messenger-hero-actions { display:flex; justify-content:center; gap:14px; margin-top:24px; flex-wrap:wrap; }
    .messenger-secondary-link { display:inline-flex; align-items:center; justify-content:center; min-width:168px; padding:13px 22px; border-radius:14px; text-decoration:none; color:#111827; background:#eef2f7; font-size:14px; font-weight:700; }
    .messenger-hero-stage { padding:24px; border-radius:34px; background:linear-gradient(180deg, #fff4f7 0%, #f4f7ff 100%); box-shadow:0 24px 56px rgba(20,24,40,.10); }
    .messenger-hero-stage img { display:block; width:min(1020px, 100%); margin:0 auto; border-radius:24px; }
    .messenger-advantages { display:grid; gap:20px; }
    .messenger-heading { max-width:760px; }
    .messenger-heading.center { margin:0 auto; text-align:center; }
    .messenger-heading h2 { margin:0; font-size:clamp(32px, 4.2vw, 54px); line-height:1.06; letter-spacing:-0.045em; }
    .messenger-heading p { margin:14px 0 0; color:var(--muted); font-size:16px; line-height:1.8; }
    .messenger-adv-grid { display:grid; grid-template-columns:repeat(4, 1fr); gap:16px; }
    .messenger-adv-card { min-height:220px; padding:26px 22px; border-radius:26px; background:#f3f6fa; display:flex; flex-direction:column; }
    .messenger-adv-card strong { font-size:14px; color:#6f43ff; }
    .messenger-adv-card h3 { margin:14px 0 0; font-size:24px; letter-spacing:-0.03em; }
    .messenger-adv-card p { margin:auto 0 0; color:#5b6476; font-size:14px; line-height:1.75; }
    .messenger-showcase { display:grid; grid-template-columns:.95fr 1.05fr; gap:18px; align-items:stretch; }
    .messenger-platforms, .messenger-visual { border-radius:30px; overflow:hidden; }
    .messenger-platforms { padding:30px 28px; background:#f4f7fb; display:flex; flex-direction:column; }
    .messenger-platforms h2 { margin:0; font-size:clamp(30px, 4vw, 48px); line-height:1.06; letter-spacing:-0.045em; }
    .messenger-platforms p { margin:16px 0 0; color:var(--muted); font-size:15px; line-height:1.82; }
    .messenger-platform-list { display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-top:22px; }
    .messenger-platform { padding:16px 18px; border-radius:18px; background:#fff; border:1px solid #e7edf5; }
    .messenger-platform h3 { margin:0; font-size:16px; }
    .messenger-platform p { margin:8px 0 0; font-size:13px; line-height:1.65; color:#5d6678; }
    .messenger-visual { padding:18px; background:linear-gradient(180deg, #f8f3ff 0%, #edf6ff 100%); }
    .messenger-visual img { display:block; width:100%; height:100%; object-fit:contain; border-radius:22px; background:#fff; }
    .messenger-workflow { display:grid; grid-template-columns:repeat(3, 1fr); gap:18px; }
    .messenger-work-card { padding:28px 24px; border-radius:26px; background:#f5f7fb; }
    .messenger-work-card h3 { margin:0; font-size:24px; letter-spacing:-0.03em; }
    .messenger-work-card p { margin:14px 0 0; color:var(--muted); font-size:14px; line-height:1.78; }
    .messenger-faq-list { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
    .messenger-bottom-cta { margin-top:4px; }
    @media (max-width: 1024px) {
      .messenger-adv-grid, .messenger-showcase, .messenger-workflow, .messenger-faq-list, .messenger-platform-list { grid-template-columns:1fr; }
    }
    @media (max-width: 720px) {
      .messenger-hero-stage { padding:18px; border-radius:24px; }
      .messenger-platforms, .messenger-work-card, .messenger-adv-card { padding:24px 20px; }
      .messenger-hero-copy h1 { font-size:42px; }
      .messenger-hero-copy p { font-size:16px; }
    }