*, *::before, *::after { box-sizing: border-box; }
  html, body { margin: 0; padding: 0; -webkit-text-size-adjust: 100%; }
  :root { --bg:#f4f6f8; --ink:#0f2e2a; --ink-soft:#5b6875; --line:#dde3e9; --accent:#138a74; --accent-soft:#e6f1f2; --thumb:#e6ecf1; }
  body { font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--ink); min-height: 100vh; overflow-x: hidden; }
  a { color: inherit; }
  img { display: block; max-width: 100%; }
  h1, h2, h3 { font-family: "Playfair Display", Georgia, serif; font-weight: 600; margin: 0; }
  button, input { font: inherit; }
  [hidden] { display: none !important; }
  .icon { width: 18px; height: 18px; flex: 0 0 auto; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
  .icon-sm { width: 15px; height: 15px; }

  .wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 clamp(18px, 4vw, 40px); }
  .narrow { max-width: 720px; margin: 0 auto; padding: 0 clamp(18px, 4vw, 40px); }
  .reveal { opacity: 0; transform: translateY(12px); transition: opacity .6s ease, transform .6s ease; }
  .reveal.in { opacity: 1; transform: none; }
  @media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

  /* Notification banner */
  .notice { position: sticky; top: 0; z-index: 60; background: var(--ink); color: #f1f5f8; font-size: 14px; }
  .notice .inner { display: flex; align-items: center; gap: 12px; padding: 10px 0; flex-wrap: wrap; }
  .notice .inner span { flex: 1 1 260px; line-height: 1.5; }
  .notice a { color: #9fd9d4; font-weight: 600; text-decoration: none; white-space: nowrap; display: inline-flex; gap: 6px; align-items: center; }
  .notice button { background: transparent; border: 0; color: #f1f5f8; cursor: pointer; padding: 4px; border-radius: 6px; display: inline-flex; }
  .notice button:hover { background: rgba(255,255,255,.1); }

  /* Header */
  .topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 18px 0; flex-wrap: wrap; }
  .brand { font-family: "Playfair Display", Georgia, serif; font-size: 22px; font-weight: 700; text-decoration: none; color: var(--ink); display: inline-flex; align-items: center; gap: 8px; }
  .nav { display: flex; gap: 18px; font-size: 14px; font-weight: 500; flex-wrap: wrap; }
  .nav a { text-decoration: none; color: var(--ink-soft); padding-bottom: 3px; display: inline-flex; gap: 6px; align-items: center; }
  .nav a[aria-current="page"] { color: var(--ink); box-shadow: inset 0 -2px 0 var(--accent); }

  /* Common */
  .eyebrow { font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
  .lead { margin: 0; font-size: clamp(15px, 2vw, 17px); line-height: 1.65; color: var(--ink-soft); max-width: 58ch; }
  .sec { padding: clamp(28px, 5vw, 44px) 0; border-top: 1px solid var(--line); }
  .sec-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
  .sec-head h2 { font-size: clamp(22px, 3vw, 28px); }
  .sec-head a { font-size: 14px; color: var(--accent); font-weight: 600; text-decoration: none; }
  .btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 18px; border-radius: 10px; background: var(--accent); color: #fff; text-decoration: none; font-size: 14px; font-weight: 600; white-space: nowrap; border: 0; cursor: pointer; }
  .disclosure { font-size: 13px; line-height: 1.6; color: var(--ink-soft); margin: 0; }
  .disclosure a { color: var(--accent); }

  .chips { display: flex; flex-wrap: wrap; gap: 8px; }
  .chips a { font-size: 14px; padding: 8px 14px; border-radius: 999px; text-decoration: none; background: #fff; border: 1px solid var(--line); color: var(--ink); display: inline-flex; gap: 6px; align-items: center; }
  .chips a:hover { border-color: var(--accent); color: var(--accent); }

  .search { display: flex; gap: 8px; width: 100%; max-width: 480px; }
  .search input { flex: 1; min-width: 0; padding: 12px 14px; font-size: 15px; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 10px; }
  .search button { padding: 12px 18px; border: 0; border-radius: 10px; background: var(--ink); color: #fff; font-weight: 600; font-size: 14px; cursor: pointer; display: inline-flex; gap: 6px; align-items: center; }

  /* Article list */
  .articles { display: grid; }
  .article { display: grid; grid-template-columns: 84px minmax(0, 1fr); gap: 16px; align-items: start; text-decoration: none; padding: 18px 0; border-top: 1px solid var(--line); }
  .article .thumb { width: 84px; height: 84px; border-radius: 10px; background: var(--thumb); overflow: hidden; padding: 4px; }
  .article .thumb img { width: 100%; height: 100%; object-fit: contain; }
  .article h3 { font-size: clamp(17px, 2.2vw, 20px); line-height: 1.3; margin: 0 0 6px; }
  .article:hover h3 { text-decoration: underline; text-underline-offset: 3px; }
  .article p { margin: 0; font-size: 14px; line-height: 1.6; color: var(--ink-soft); }
  .article .meta { margin-top: 8px; font-size: 12px; color: var(--ink-soft); }

  /* Home */
  .hero { padding: clamp(36px, 6vw, 64px) 0 clamp(28px, 4vw, 44px); display: grid; gap: 28px; align-items: center; }
  .hero-copy { display: grid; gap: 16px; }
  .hero h1 { font-size: clamp(32px, 5.6vw, 52px); line-height: 1.08; max-width: 16ch; }
  .hero-media { border-radius: 20px; overflow: hidden; aspect-ratio: 3 / 2; background: #dfe7ee; }
  .hero-media img { width: 100%; height: 100%; object-fit: cover; }
  .pick-row { display: flex; justify-content: space-between; align-items: center; gap: 14px; padding: 16px 0; border-top: 1px solid var(--line); flex-wrap: wrap; }
  .pick-row b { font-weight: 600; font-size: 15px; }
  .steps { display: grid; gap: 22px; }
  .step-card { display: grid; gap: 8px; }
  .step-card .ico { width: 40px; height: 40px; border-radius: 12px; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; }
  .step-card h3 { font-size: 18px; }
  .step-card p { margin: 0; font-size: 14px; line-height: 1.6; color: var(--ink-soft); }

  .page-head { padding: clamp(32px, 5vw, 56px) 0 22px; display: grid; gap: 10px; }
  .page-head h1 { font-size: clamp(28px, 4.5vw, 40px); line-height: 1.12; }
  .back-link { font-size: 14px; color: var(--ink-soft); text-decoration: none; display: inline-flex; gap: 6px; align-items: center; }

  /* About page */
  .about-intro { display: grid; gap: 14px; padding-bottom: 8px; }
  .about-grid { display: grid; gap: 14px; margin-top: 8px; }
  .panel { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 22px; display: grid; gap: 10px; }
  .panel .ico { width: 40px; height: 40px; border-radius: 12px; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; }
  .panel h3 { font-size: 18px; }
  .panel p { margin: 0; font-size: 15px; line-height: 1.7; color: var(--ink-soft); }
  .team { display: grid; gap: 14px; }
  .member { display: grid; grid-template-columns: 56px minmax(0, 1fr); gap: 14px; align-items: center; background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 18px; }
  .member .avatar { width: 56px; height: 56px; border-radius: 50%; background: var(--accent); color: #fff; display: grid; place-items: center; font-weight: 700; font-size: 16px; }
  .member b { font-size: 15px; display: block; }
  .member span { font-size: 13px; color: var(--ink-soft); }
  .member p { margin: 6px 0 0; font-size: 14px; line-height: 1.6; color: var(--ink-soft); }
  .faq-list { display: grid; gap: 10px; }
  .faq-list details { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; }
  .faq-list summary { cursor: pointer; font-weight: 600; font-size: 15px; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
  .faq-list summary::-webkit-details-marker { display: none; }
  .faq-list summary::after { content: "+"; color: var(--accent); font-weight: 700; }
  .faq-list details[open] summary::after { content: "–"; }
  .faq-list details p { margin: 10px 0 0; font-size: 15px; line-height: 1.7; color: var(--ink-soft); }
  .contact-card { background: var(--ink); color: #f1f5f8; border-radius: 18px; padding: clamp(22px, 4vw, 32px); display: grid; gap: 12px; }
  .contact-card h2 { font-size: clamp(22px, 3vw, 28px); }
  .contact-card p { margin: 0; font-size: 15px; line-height: 1.6; color: #c9d3dc; }
  .contact-card a { color: #9fd9d4; font-weight: 600; text-decoration: none; display: inline-flex; gap: 8px; align-items: center; }
  .contact-card .btn { background: #9fd9d4; color: var(--ink); width: fit-content; }

  /* Article page */
  .a-hero { padding: clamp(28px, 5vw, 48px) 0 0; }
  .crumbs { font-size: 13px; color: var(--ink-soft); display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
  .crumbs a { text-decoration: none; color: var(--ink-soft); }
  .a-hero h1 { font-size: clamp(30px, 5vw, 44px); line-height: 1.12; margin: 14px 0 14px; }
  .a-dek { font-size: clamp(16px, 2vw, 18px); line-height: 1.6; color: var(--ink-soft); margin: 0 0 18px; }
  .byline { display: flex; gap: 12px; align-items: center; font-size: 13px; color: var(--ink-soft); flex-wrap: wrap; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
  .avatar-sm { width: 36px; height: 36px; border-radius: 50%; background: var(--accent); color: #fff; display: grid; place-items: center; font-weight: 700; font-size: 13px; }
  .byline b { color: var(--ink); font-weight: 600; }
  .a-cover { margin: 26px 0 8px; border-radius: 18px; overflow: hidden; background: var(--thumb); aspect-ratio: 16 / 10; }
  .a-cover img { width: 100%; height: 100%; object-fit: contain; padding: 12px; }
  .disclosure-box { margin: 22px 0 0; padding: 14px 16px; border-radius: 12px; background: var(--accent-soft); font-size: 13px; line-height: 1.6; color: var(--ink-soft); display: flex; gap: 10px; }
  .disclosure-box strong { color: var(--ink); }
  .toc { margin: 26px 0 0; padding: 18px 20px; border-radius: 14px; background: #fff; border: 1px solid var(--line); }
  .toc h2 { font-size: 16px; font-family: Inter, system-ui, sans-serif; font-weight: 600; margin-bottom: 10px; }
  .toc ol { margin: 0; padding-left: 20px; display: grid; gap: 6px; font-size: 14px; }
  .toc a { color: var(--accent); text-decoration: none; }
  .quick { margin: 26px 0 0; padding: 20px; border-radius: 16px; background: #fff; border: 1px solid var(--line); display: grid; gap: 12px; }
  .quick h2 { font-size: 18px; display: flex; gap: 8px; align-items: center; }
  .quick h2 .icon { color: var(--accent); }
  .quick ul { margin: 0; padding-left: 20px; display: grid; gap: 8px; font-size: 15px; line-height: 1.55; }
  .article-body { margin-top: 30px; }
  .article-body h2 { font-size: clamp(22px, 3vw, 27px); margin: 38px 0 12px; scroll-margin-top: 24px; }
  .article-body p { font-size: 17px; line-height: 1.8; margin: 0 0 16px; }
  .article-body ul { margin: 0 0 16px; padding-left: 22px; display: grid; gap: 8px; font-size: 16px; line-height: 1.7; }
  .callout { margin: 26px 0; padding: 18px 20px; border-left: 4px solid var(--accent); background: #fff; border-radius: 10px; display: flex; gap: 12px; }
  .callout p { margin: 0; font-size: 15px; }
  .compare { margin: 22px 0 28px; border-radius: 12px; overflow-x: auto; -webkit-overflow-scrolling: touch; background: #fff; border: 1px solid var(--line); }
  .compare table { border-collapse: collapse; width: 100%; min-width: 520px; font-size: 14px; }
  .compare th, .compare td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
  .compare th { background: var(--accent-soft); font-weight: 600; font-size: 13px; }
  .compare td:first-child { font-weight: 600; }
  .product { margin: 18px 0; padding: 20px; border-radius: 18px; background: #fff; border: 1px solid var(--line); display: grid; gap: 14px; }
  .product .tag { justify-self: start; font-size: 12px; font-weight: 600; padding: 5px 10px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); }
  .product h3 { font-size: 20px; margin: 0; }
  .product .spec { font-size: 14px; color: var(--ink-soft); margin: 0; line-height: 1.6; }
  .product .split { display: grid; gap: 12px; }
  .product .split div { font-size: 14px; line-height: 1.6; }
  .product .split b { display: flex; gap: 6px; align-items: center; font-size: 13px; margin-bottom: 4px; }
  .product .split ul { margin: 0; padding-left: 18px; display: grid; gap: 4px; }
  .product .pro b { color: #2e7d5b; }
  .product .con b { color: #a2473a; }
  .product .foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; padding-top: 14px; border-top: 1px solid var(--line); }
  .product .foot small { font-size: 12px; color: var(--ink-soft); }
  .faq { display: grid; gap: 10px; margin-top: 16px; }
  .faq details { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; }
  .faq summary { cursor: pointer; font-weight: 600; font-size: 15px; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
  .faq summary::-webkit-details-marker { display: none; }
  .faq summary::after { content: "+"; color: var(--accent); font-weight: 700; }
  .faq details[open] summary::after { content: "–"; }
  .faq details p { margin: 10px 0 0; font-size: 15px; line-height: 1.7; }
  .author-box { margin-top: 40px; padding: 20px; border-radius: 16px; background: #fff; border: 1px solid var(--line); display: grid; gap: 10px; }
  .author-box b { font-size: 15px; }
  .author-box p { margin: 0; font-size: 14px; line-height: 1.6; color: var(--ink-soft); }
  .related { margin-top: 36px; }
  .sticky-cta { display: none; }

  .share { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 18px 0 0; }
  .share-label { display: inline-flex; gap: 6px; align-items: center; font-size: 13px; font-weight: 600; color: var(--ink-soft); margin-right: 4px; }
  .share-btn { display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; border-radius: 999px; border: 1px solid var(--line); background: #fff; color: var(--ink); font: 500 13px/1 Inter, system-ui, sans-serif; text-decoration: none; cursor: pointer; }
  .share-btn:hover { border-color: var(--accent); color: var(--accent); }
  .share-btn[hidden] { display: none; }

  .cc-text { display: grid; gap: 12px; }
  .contact-card { grid-template-columns: 1fr; }

  /* Footer */
  .site-foot { margin-top: 20px; padding: 36px 0 56px; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: 13px; }
  .site-foot .cols { display: grid; gap: 16px; }
  .site-foot a { color: var(--ink); text-decoration: none; }

  /* Responsive */
  @media (min-width: 720px) {
    .articles.two { grid-template-columns: 1fr 1fr; column-gap: 28px; }
    .article { grid-template-columns: 100px minmax(0, 1fr); }
    .article .thumb { width: 100px; height: 100px; }
    .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); column-gap: 28px; }
    .site-foot .cols { grid-template-columns: 2fr 1fr 1fr; }
    .hero { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); }
    .about-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .team { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .product .split { grid-template-columns: 1fr 1fr; }
    .quick { padding: 24px; }
    .contact-card { grid-template-columns: minmax(0, 1fr) auto; align-items: center; }
    .contact-card .btn { justify-self: end; }
  }
  @media (max-width: 479px) {
    .nav { gap: 12px; font-size: 13px; }
    .article { grid-template-columns: 72px minmax(0, 1fr); gap: 12px; }
    .article .thumb { width: 72px; height: 72px; }
    .search { flex-direction: column; }
    .search button { width: 100%; justify-content: center; }
    .pick-row .btn { width: 100%; }
    .product .foot .btn { width: 100%; }
    .notice .inner span { flex-basis: 100%; }
    .sticky-cta { display: flex; position: fixed; bottom: 0; left: 0; right: 0; padding: 12px 16px; background: #fff; border-top: 1px solid var(--line); z-index: 40; justify-content: space-between; align-items: center; gap: 12px; }
    .sticky-cta span { font-size: 13px; color: var(--ink-soft); }
    .art-page { padding-bottom: 80px; }
  }