/* sinopak/feature-grid — 1:1 port of the React prototype sections
 * (sinopak-h5-homepage src/styles.css). Each seeded instance resolves to a
 * design class `.spk-x-features--d-*` (see render.php header) that mirrors one
 * prototype section. Colors are the prototype literals where they diverge from
 * the plugin tokens (React navy #062b5c vs token #06366b, etc.) — kept as
 * block-scoped custom properties below; global tokens untouched. */

@layer spk-block {
  /* ── Block-scoped design tokens (React :root literals) ─────────────── */
  .spk-x-features {
    --spkf-navy: #062b5c;      /* --sinopak-navy */
    --spkf-deep: #064a7d;      /* --sinopak-deep-blue */
    --spkf-blue: #087eae;      /* --sinopak-blue */
    --spkf-ink: #152431;       /* --text-primary */
    --spkf-muted: #51616e;     /* --text-secondary */
    --spkf-line: #dce4e9;      /* --border-light */
    --spkf-soft: #f4f7f9;      /* --background-light */
    --spkf-orange: var(--spk-x-accent, #f28a2e);
  }

  /* ── Section shell ──────────────────────────────────────────────────── */
  .spk-x-features {
    padding: clamp(58px, 7vw, 96px) 0;
    border-bottom: 1px solid var(--spkf-line);
  }
  .spk-x-features--soft { background: var(--spkf-soft); }
  .spk-x-features__shell {
    width: min(85vw, 1240px);
    max-width: min(1240px, 100%);
    margin: 0 auto;
  }

  /* ── Head (per-family type below) ───────────────────────────────────── */
  .spk-x-features__head { max-width: 860px; margin: 0 0 34px; }
  .spk-x-features__head--center { margin-inline: auto; text-align: center; }
  .spk-x-features__label {
    margin: 0 0 18px;
    color: var(--spkf-orange);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: .14em;
    text-transform: uppercase;
  }
  .spk-x-features__title {
    margin: 0 0 16px;
    color: var(--spkf-navy);
    font-size: clamp(30px, 3.2vw, 48px);
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: 0;
    text-wrap: balance;
  }
  .spk-x-features__lead { max-width: 100%; }
  .spk-x-features__lead p {
    margin: 0 0 8px;
    color: var(--spkf-muted);
    font-size: 16px;
    line-height: 1.72;
    text-wrap: pretty;
  }
  .spk-x-features__lead > :last-child { margin-bottom: 0; }
  .spk-x-features__head--center .spk-x-features__lead p { margin-inline: auto; }

  /* Section link (React .section-link) — head + after-grid placements. */
  .spk-x-features__head-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: 8px;
    color: var(--spkf-deep);
    font-size: 13px;
    font-weight: 900;
    letter-spacing: .08em;
    text-transform: uppercase;
  }
  .spk-x-features__head-link .spk-x-features__arrow { width: 17px; height: 17px; transition: transform .18s ease; }
  .spk-x-features__head-link:hover { color: var(--spkf-orange); }
  .spk-x-features__head-link:hover .spk-x-features__arrow { transform: translateX(4px); }
  .spk-x-features__after-link { margin-top: 28px; }
  .spk-x-features__after-link .spk-x-features__head-link { margin-top: 0; }

  /* ── Shared item primitives ─────────────────────────────────────────── */
  .spk-x-features__grid { display: grid; }
  .spk-x-features__item { min-width: 0; }
  .spk-x-features__media { margin: 0; overflow: hidden; }
  .spk-x-features__media img { display: block; width: 100%; height: 100%; object-fit: cover; }
  .spk-x-features__item-title {
    margin: 0;
    color: var(--spkf-navy);
    font-size: 17px;
    font-weight: 900;
    line-height: 1.22;
  }
  .spk-x-features__text { min-width: 0; }
  .spk-x-features__text p,
  .spk-x-features__text li {
    margin: 0;
    color: var(--spkf-muted);
    font-size: 13px;
    line-height: 1.58;
    text-wrap: pretty;
  }
  .spk-x-features__text p { margin-bottom: 6px; }
  .spk-x-features__text > :last-child { margin-bottom: 0; }
  .spk-x-features__text ul { margin: 6px 0 0; padding-left: 1.1em; list-style: disc; }
  .spk-x-features__icon { display: block; color: var(--spkf-blue); }
  .spk-x-features__cta {
    align-self: end;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    margin-top: 4px;
    color: var(--spkf-deep);
    font-size: 11px;
    font-weight: 900;
    letter-spacing: .05em;
    text-transform: uppercase;
  }
  .spk-x-features__cta .spk-x-features__arrow { width: 15px; height: 15px; transition: transform .18s ease; }
  .spk-x-features__cta:hover { color: var(--spkf-orange); }
  .spk-x-features__cta:hover .spk-x-features__arrow { transform: translateX(3px); }

  /* Data-driven hairline column counts (questions / topics / quality). */
  .spk-x-features__grid--cols-1 { grid-template-columns: 1fr; }
  .spk-x-features__grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
  .spk-x-features__grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
  .spk-x-features__grid--cols-4 { grid-template-columns: repeat(4, 1fr); }
  .spk-x-features__grid--cols-5 { grid-template-columns: repeat(5, 1fr); }
  .spk-x-features__grid--cols-6 { grid-template-columns: repeat(6, 1fr); }

  /* ── Family type scales ─────────────────────────────────────────────── */
  /* Service (React .service-section-head) */
  .spk-x-features--f-service .spk-x-features__head { max-width: 820px; }
  .spk-x-features--f-service .spk-x-features__title { margin-bottom: 12px; font-size: clamp(28px, 3vw, 44px); line-height: 1.12; }
  .spk-x-features--f-service .spk-x-features__lead p { font-size: 15px; line-height: 1.66; }
  /* Knowledge (React .knowledge-section-head) */
  .spk-x-features--f-knowledge { padding: clamp(56px, 7vw, 94px) 0; }
  .spk-x-features--f-knowledge .spk-x-features__head { max-width: 760px; }
  .spk-x-features--f-knowledge .spk-x-features__title { margin-bottom: 10px; font-size: clamp(28px, 3vw, 42px); line-height: 1.12; }
  .spk-x-features--f-knowledge .spk-x-features__lead p { font-size: 15px; line-height: 1.65; }
  /* Machine (React .machine-section-head + .module-number) */
  .spk-x-features--f-machine { padding: clamp(66px, 7vw, 106px) 0; }
  .spk-x-features--f-machine .spk-x-features__head { max-width: 920px; margin-bottom: 30px; }
  .spk-x-features--f-machine .spk-x-features__title { margin-bottom: 10px; font-size: clamp(30px, 3.2vw, 52px); line-height: 1.05; }
  .spk-x-features--f-machine .spk-x-features__lead p { max-width: 760px; font-size: 16px; }
  .spk-x-features__module {
    display: inline-block;
    margin-right: 14px;
    color: var(--spkf-deep);
    font-size: clamp(26px, 3vw, 40px);
    font-weight: 950;
    line-height: 1;
  }

  /* ════ capabilities — About "What We Do" (.about-capabilities /
         .system-flow / .system-nodes / .system-result) ═══════════════════ */
  .spk-x-features--d-capabilities { padding-top: clamp(42px, 5vw, 68px); }
  .spk-x-features--d-capabilities .spk-x-features__head { margin-bottom: clamp(34px, 5vw, 58px); }
  .spk-x-features--d-capabilities .spk-x-features__title { max-width: 720px; }
  .spk-x-features--d-capabilities .spk-x-features__lead p { max-width: 780px; }
  .spk-x-features--d-capabilities .spk-x-features__head-link { margin-top: 14px; }
  .spk-x-features--d-capabilities .spk-x-features__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(24px, 3vw, 34px);
  }
  .spk-x-features--d-capabilities .spk-x-features__item {
    display: grid;
    grid-template-rows: 240px auto;
    gap: 16px;
  }
  .spk-x-features--d-capabilities .spk-x-features__media {
    border-radius: 12px;
  }
  .spk-x-features--d-capabilities .spk-x-features__body {
    min-height: 0;
    display: grid;
    align-content: start;
    gap: 8px;
    padding: 0 4px;
  }
  .spk-x-features--d-capabilities .spk-x-features__body .spk-x-features__icon { width: 23px; height: 23px; }
  .spk-x-features--d-capabilities .spk-x-features__text p { line-height: 1.55; }
  .spk-x-features__result {
    display: grid;
    gap: 4px;
    justify-items: center;
    margin-top: 18px;
    padding: 18px;
    border-radius: 12px;
    background: var(--spkf-navy);
    color: #fff;
    text-align: center;
  }
  .spk-x-features__result strong { font-size: 18px; font-weight: 900; }
  .spk-x-features__result span { color: rgba(255, 255, 255, .72); font-size: 13px; font-weight: 780; }

  /* ════ stories — About "Engineering & Manufacturing"
         (.engineering-layout / .engineering-card) ══════════════════════ */
  .spk-x-features--d-stories .spk-x-features__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
  .spk-x-features--d-stories .spk-x-features__item {
    display: grid;
    grid-template-rows: 210px 1fr;
    min-height: 354px;
    overflow: hidden;
    border: 1px solid var(--spkf-line);
    border-radius: 12px;
    background: #fff;
  }
  .spk-x-features--d-stories .spk-x-features__media img { transition: transform .45s ease; }
  .spk-x-features--d-stories .spk-x-features__item:hover .spk-x-features__media img { transform: scale(1.035); }
  .spk-x-features--d-stories .spk-x-features__media { position: relative; }
  .spk-x-features--d-stories .spk-x-features__item--video .spk-x-features__media::after {
    position: absolute;
    inset: 0;
    content: "";
    background: rgba(2, 27, 61, .12);
  }
  .spk-x-features__play {
    position: absolute;
    top: 50%;
    left: 50%;
    z-index: 2;
    width: 58px;
    height: 58px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: 2px solid rgba(255, 255, 255, .86);
    border-radius: 50%;
    background: rgba(242, 138, 46, .96);
    color: #fff;
    transform: translate(-50%, -50%);
    box-shadow: 0 14px 34px rgba(2, 27, 61, .22);
  }
  .spk-x-features__play svg { width: 21px; height: 21px; color: #fff; }
  .spk-x-features__play:hover { background: #ff902d; }
  .spk-x-features--d-stories .spk-x-features__body {
    display: grid;
    align-content: start;
    gap: 7px;
    padding: 17px 18px 19px;
  }
  .spk-x-features--d-stories .spk-x-features__text p { line-height: 1.55; }

  /* ════ workflow — About "How We Work" (.work-timeline) ═══════════════ */
  .spk-x-features--d-workflow .spk-x-features__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 26px;
    padding-top: 36px;
  }
  .spk-x-features--d-workflow .spk-x-features__item {
    display: grid;
    align-content: start;
    justify-items: start;
    gap: 14px;
    background: #fff;
  }
  .spk-x-features__icon-box {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    background: rgba(8, 168, 210, .09);
    color: var(--spkf-blue);
  }
  .spk-x-features__icon-box .spk-x-features__icon { width: 21px; height: 21px; color: inherit; }
  .spk-x-features--d-workflow .spk-x-features__item-title { font-size: 22px; }
  .spk-x-features--d-workflow .spk-x-features__text p { font-size: 14px; font-weight: 760; line-height: 1.6; }
  .spk-x-features__closing {
    max-width: 820px;
    margin: 42px 0 0;
    color: var(--spkf-navy);
    font-size: clamp(20px, 2vw, 28px);
    font-weight: 850;
    line-height: 1.32;
    text-wrap: pretty;
  }

  /* ════ people — About "Our Team" (.people-grid) ══════════════════════ */
  .spk-x-features--d-people .spk-x-features__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .spk-x-features--d-people .spk-x-features__item {
    overflow: hidden;
    border: 1px solid var(--spkf-line);
    border-radius: 12px;
    background: #fff;
  }
  .spk-x-features--d-people .spk-x-features__media img { aspect-ratio: 1.52; }
  .spk-x-features--d-people .spk-x-features__body { padding: 20px; }
  .spk-x-features--d-people .spk-x-features__text p { line-height: 1.55; }

  /* ════ quality — About "Quality & Global Delivery" (.quality-grid) ═══ */
  .spk-x-features--d-quality .spk-x-features__grid {
    gap: 1px;
    background: var(--spkf-line);
    border: 1px solid var(--spkf-line);
  }
  .spk-x-features--d-quality .spk-x-features__item {
    min-height: 190px;
    display: grid;
    align-content: start;
    gap: 12px;
    padding: 22px;
    background: #fff;
  }
  .spk-x-features--d-quality .spk-x-features__icon { width: 28px; height: 28px; stroke-width: 1.55; }
  .spk-x-features--d-quality .spk-x-features__text p { line-height: 1.55; }

  /* ════ planning — Service "Before Production" (.planning-grid) ═══════ */
  .spk-x-features--d-planning .spk-x-features__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: clamp(28px, 5vw, 78px);
  }
  .spk-x-features--d-planning .spk-x-features__item {
    display: grid;
    align-content: start;
    gap: 12px;
  }
  .spk-x-features--d-planning .spk-x-features__icon { width: 42px; height: 42px; stroke-width: 1.45; }
  .spk-x-features--d-planning .spk-x-features__item-title { font-size: 18px; line-height: 1.24; }
  .spk-x-features__evidence {
    margin-top: 4px;
    color: var(--spkf-deep);
    font-size: 11px;
    font-weight: 900;
    letter-spacing: .04em;
    text-transform: uppercase;
  }

  /* ════ startup — Service "Installation & Startup"
         (.startup-layout / .startup-steps) ═════════════════════════════ */
  .spk-x-features--d-startup .spk-x-features__layout {
    display: grid;
    grid-template-columns: minmax(320px, .75fr) minmax(0, 1.25fr);
    gap: clamp(28px, 5vw, 64px);
    align-items: center;
  }
  .spk-x-features--d-startup .spk-x-features__side-media {
    margin: 0;
    overflow: hidden;
    border-radius: 12px;
    background: #e9eef2;
  }
  .spk-x-features--d-startup .spk-x-features__side-media img {
    display: block;
    width: 100%;
    aspect-ratio: 1.58;
    object-fit: cover;
  }
  .spk-x-features--d-startup .spk-x-features__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 26px;
  }
  .spk-x-features--d-startup .spk-x-features__item {
    position: relative;
    display: grid;
    align-content: start;
    gap: 10px;
  }
  .spk-x-features--d-startup .spk-x-features__item:not(:last-child)::after {
    position: absolute;
    top: 17px;
    right: -22px;
    left: 42px;
    height: 1px;
    content: "";
    background: #b9c7d2;
  }
  .spk-x-features--d-startup .spk-x-features__num {
    z-index: 1;
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    background: var(--spkf-deep);
    color: #fff;
    font-size: 13px;
    font-weight: 900;
  }
  .spk-x-features--d-startup .spk-x-features__item-title { font-size: 18px; line-height: 1.24; }

  /* ════ aftersales — Service "After-Sales Support" (.after-sales-grid) ═ */
  .spk-x-features--d-aftersales .spk-x-features__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
  .spk-x-features--d-aftersales .spk-x-features__item {
    display: grid;
    grid-template-columns: minmax(0, .95fr) minmax(210px, 1.05fr);
    min-height: 220px;
    overflow: hidden;
    border: 1px solid var(--spkf-line);
    border-radius: 12px;
    background: #fff;
  }
  .spk-x-features--d-aftersales .spk-x-features__body {
    display: grid;
    align-content: start;
    gap: 9px;
    padding: 24px;
  }
  .spk-x-features--d-aftersales .spk-x-features__icon { width: 31px; height: 31px; stroke-width: 1.55; }
  .spk-x-features--d-aftersales .spk-x-features__item-title { font-size: 18px; line-height: 1.24; }
  /* Prototype emphasizes the 2nd card (spare parts) positionally. */
  .spk-x-features--d-aftersales .spk-x-features__item:nth-child(2) {
    border-color: rgba(242, 138, 46, .44);
    background: #fffaf4;
  }

  /* ════ questions — Knowledge "What Are You Trying to Solve?"
         (.question-index) ══════════════════════════════════════════════ */
  .spk-x-features--d-questions .spk-x-features__grid,
  .spk-x-features--d-topics .spk-x-features__grid {
    border: 1px solid var(--spkf-line);
    background: #fff;
  }
  .spk-x-features--d-questions .spk-x-features__item,
  .spk-x-features--d-topics .spk-x-features__item {
    display: grid;
    align-content: start;
    gap: 12px;
    padding: 26px 22px;
  }
  .spk-x-features--d-questions .spk-x-features__item { min-height: 254px; }
  .spk-x-features--d-questions .spk-x-features__item + .spk-x-features__item,
  .spk-x-features--d-topics .spk-x-features__item + .spk-x-features__item {
    border-left: 1px solid var(--spkf-line);
  }
  .spk-x-features--d-questions .spk-x-features__icon,
  .spk-x-features--d-topics .spk-x-features__icon { color: var(--spkf-deep); stroke-width: 1.5; }
  .spk-x-features--d-questions .spk-x-features__icon { width: 34px; height: 34px; }
  .spk-x-features--d-questions .spk-x-features__item-title,
  .spk-x-features--d-topics .spk-x-features__item-title { font-size: 18px; line-height: 1.24; }

  /* ════ topics — Knowledge "Explore by Topic" (.topic-index) ══════════ */
  .spk-x-features--d-topics .spk-x-features__item { min-height: 352px; }
  .spk-x-features--d-topics .spk-x-features__icon { width: 32px; height: 32px; }
  .spk-x-features__tags {
    display: grid;
    gap: 7px;
    margin: 4px 0 0;
    padding: 0 0 0 16px;
    list-style: disc;
    color: var(--spkf-deep);
  }
  .spk-x-features__tags li {
    padding-left: 2px;
    font-size: 12px;
    line-height: 1.45;
  }
  .spk-x-features__tags a { color: inherit; }
  .spk-x-features__tags a:hover { color: var(--spkf-orange); }

  /* ════ pathways — Knowledge "From Knowledge to Your Production Line"
         (.pathway-grid) ════════════════════════════════════════════════ */
  .spk-x-features--d-pathways .spk-x-features__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }
  .spk-x-features--d-pathways .spk-x-features__item {
    display: grid;
    overflow: hidden;
    border: 1px solid var(--spkf-line);
    border-radius: 12px;
    background: #fff;
  }
  .spk-x-features--d-pathways .spk-x-features__media { background: #eef3f6; }
  .spk-x-features--d-pathways .spk-x-features__media img { aspect-ratio: 1.95; }
  .spk-x-features--d-pathways .spk-x-features__body {
    display: grid;
    gap: 10px;
    padding: 22px;
  }
  .spk-x-features--d-pathways .spk-x-features__item-title { font-size: 18px; line-height: 1.24; }

  /* ════ overview — machine "Product Overview" (.machine-overview /
         .overview-copy, side media styled like .detail-grid) ═══════════ */
  .spk-x-features--d-overview {
    padding: 44px 0 72px;
    background: #fff;
  }
  .spk-x-features--d-overview .spk-x-features__head {
    max-width: none;
    display: grid;
    grid-template-columns: minmax(280px, .72fr) minmax(0, 1.28fr);
    gap: clamp(28px, 5vw, 86px);
    align-items: start;
    margin-bottom: 42px;
  }
  .spk-x-features--d-overview .spk-x-features__title {
    margin: 0;
    font-size: clamp(28px, 3vw, 42px);
    line-height: 1.1;
  }
  .spk-x-features--d-overview .spk-x-features__lead p {
    max-width: 880px;
    margin-bottom: 14px;
    color: var(--spkf-ink);
    font-size: 16px;
    line-height: 1.65;
  }
  .spk-x-features--d-overview .spk-x-features__layout {
    display: grid;
    grid-template-columns: minmax(300px, .9fr) minmax(0, 1.1fr);
    gap: clamp(28px, 5vw, 64px);
    align-items: center;
  }
  .spk-x-features--d-overview .spk-x-features__side-media {
    margin: 0;
    overflow: hidden;
    border: 1px solid var(--spkf-line);
    border-radius: 12px;
    background: #eef4f7;
  }
  /* contain:这一版(render.php 的 split + mediaImage → overview)是机型 overview
     的侧图,盒比例写死 aspect-ratio:1.42,而机型图多为 1.5~1.8 —— cover 会裁掉
     机器上下缘。留白用容器已有的浅蓝底 #eef4f7。 */
  .spk-x-features--d-overview .spk-x-features__side-media img {
    display: block;
    width: 100%;
    aspect-ratio: 1.42;
    object-fit: contain;
    filter: saturate(.92) contrast(1.04);
  }
  .spk-x-features--d-overview .spk-x-features__grid { grid-template-columns: 1fr; gap: 0; }
  .spk-x-features--d-overview .spk-x-features__item { padding: 17px 0; }
  .spk-x-features--d-overview .spk-x-features__item + .spk-x-features__item { border-top: 1px solid var(--spkf-line); }
  .spk-x-features--d-overview .spk-x-features__item:first-child { padding-top: 0; }
  .spk-x-features--d-overview .spk-x-features__item:last-child { padding-bottom: 0; }
  .spk-x-features--d-overview .spk-x-features__item-title { margin-bottom: 6px; }
  .spk-x-features--d-overview .spk-x-features__text p { line-height: 1.55; }

  /* ════ benefits — machine "Built for 3 & 5 Gallon" (.benefit-list) ═══ */
  .spk-x-features--d-benefits .spk-x-features__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--spkf-line);
    border: 1px solid var(--spkf-line);
  }
  .spk-x-features--d-benefits .spk-x-features__item {
    display: grid;
    grid-template-columns: auto 34px 1fr;
    gap: 16px;
    min-height: 170px;
    padding: 28px;
    background: #fff;
  }
  .spk-x-features__num {
    color: var(--spkf-orange);
    font-size: 12px;
    font-weight: 950;
  }
  .spk-x-features--d-benefits .spk-x-features__icon { width: 27px; height: 27px; }
  .spk-x-features--d-benefits .spk-x-features__item-title {
    margin-bottom: 8px;
    font-size: 22px;
    font-weight: 700;
    line-height: 1.18;
  }
  .spk-x-features--d-benefits .spk-x-features__text p { font-size: 14px; }

  /* ════ optional — machine "Optional Equipment" (.optional-block) ═════ */
  .spk-x-features__panel {
    padding: clamp(26px, 4vw, 42px);
    border: 1px solid var(--spkf-line);
    border-radius: 12px;
    background: #fff;
  }
  .spk-x-features--d-optional .spk-x-features__head {
    max-width: none;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 24px;
  }
  .spk-x-features--d-optional .spk-x-features__title {
    margin-bottom: 8px;
    font-size: 22px;
    font-weight: 700;
    line-height: 1.18;
  }
  .spk-x-features--d-optional .spk-x-features__lead p { max-width: none; font-size: 14px; line-height: 1.58; }
  .spk-x-features__panel-icon { flex: 0 0 auto; color: var(--spkf-blue); }
  .spk-x-features__panel-icon .spk-x-features__icon { width: 34px; height: 34px; stroke-width: 1.5; }
  .spk-x-features--d-optional .spk-x-features__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--spkf-line);
    border: 1px solid var(--spkf-line);
  }
  .spk-x-features--d-optional .spk-x-features__item {
    min-height: 176px;
    display: grid;
    align-content: start;
    gap: 10px;
    padding: 22px;
    background: #f9fbfc;
  }
  .spk-x-features--d-optional .spk-x-features__icon { width: 26px; height: 26px; stroke-width: 1.6; }
  .spk-x-features--d-optional .spk-x-features__item-title {
    font-size: 15px;
    line-height: 1.25;
    text-transform: uppercase;
  }
  .spk-x-features--d-optional .spk-x-features__text p { color: #667581; }

  /* ════ quick — knowledge article "Quick Answer" (.article-quick /
         .quick-factor-grid); renders inline inside the article column ══ */
  .spk-x-features--d-quick {
    padding: 0 0 24px;
    border-bottom: 1px solid var(--spkf-line);
  }
  .spk-x-features--d-quick .spk-x-features__shell {
    width: 100%;
    max-width: none;
    display: grid;
    grid-template-columns: minmax(220px, .92fr) minmax(0, 1.85fr);
    gap: 24px;
    align-items: start;
  }
  .spk-x-features--d-quick .spk-x-features__head { max-width: none; margin: 0; }
  .spk-x-features--d-quick .spk-x-features__title {
    margin-bottom: 8px;
    font-size: 20px;
    line-height: 1.2;
  }
  .spk-x-features--d-quick .spk-x-features__lead p { font-size: 13px; line-height: 1.58; }
  .spk-x-features--d-quick .spk-x-features__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
  }
  .spk-x-features--d-quick .spk-x-features__item {
    padding: 2px 20px 0;
    border-left: 1px solid var(--spkf-line);
  }
  .spk-x-features--d-quick .spk-x-features__icon {
    width: 32px;
    height: 32px;
    margin-bottom: 10px;
    color: var(--spkf-deep);
    stroke-width: 1.6;
  }
  .spk-x-features--d-quick .spk-x-features__item-title {
    margin-bottom: 7px;
    font-size: 13px;
    line-height: 1.24;
  }
  .spk-x-features--d-quick .spk-x-features__text p { font-size: 12px; line-height: 1.48; }
}

@layer spk-responsive {
  /* ── ≤1180 (React first breakpoint) ─────────────────────────────────── */
  @media (max-width: 1180px) {
    .spk-x-features:not(.spk-x-features--d-quick) .spk-x-features__shell { width: calc(100% - 72px); }

    .spk-x-features--d-stories .spk-x-features__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .spk-x-features--d-stories .spk-x-features__item { min-height: 344px; }
    .spk-x-features--d-quality .spk-x-features__grid { grid-template-columns: repeat(2, 1fr); }

    .spk-x-features--d-planning .spk-x-features__grid { grid-template-columns: 1fr; }
    .spk-x-features--d-startup .spk-x-features__layout { grid-template-columns: 1fr; }
    .spk-x-features--d-startup .spk-x-features__grid { grid-template-columns: repeat(2, 1fr); }

    .spk-x-features--d-questions .spk-x-features__grid,
    .spk-x-features--d-topics .spk-x-features__grid { grid-template-columns: repeat(2, 1fr); }
    .spk-x-features--d-questions .spk-x-features__item,
    .spk-x-features--d-questions .spk-x-features__item + .spk-x-features__item,
    .spk-x-features--d-topics .spk-x-features__item,
    .spk-x-features--d-topics .spk-x-features__item + .spk-x-features__item { border-left: 0; }
    .spk-x-features--d-questions .spk-x-features__item:nth-child(n + 3),
    .spk-x-features--d-topics .spk-x-features__item:nth-child(n + 3) { border-top: 1px solid var(--spkf-line); }
    .spk-x-features--d-questions .spk-x-features__item:nth-child(even),
    .spk-x-features--d-topics .spk-x-features__item:nth-child(even) { border-left: 1px solid var(--spkf-line); }
    .spk-x-features--d-pathways .spk-x-features__grid { grid-template-columns: repeat(2, 1fr); }

    .spk-x-features--d-overview .spk-x-features__head { grid-template-columns: 1fr; }
    .spk-x-features--d-overview .spk-x-features__layout { grid-template-columns: 1fr; }
    .spk-x-features--d-benefits .spk-x-features__grid,
    .spk-x-features--d-optional .spk-x-features__grid { grid-template-columns: repeat(2, 1fr); }

    .spk-x-features--d-quick .spk-x-features__shell { grid-template-columns: 1fr; }
    .spk-x-features--d-quick .spk-x-features__grid { grid-template-columns: repeat(2, 1fr); row-gap: 20px; }
    .spk-x-features--d-quick .spk-x-features__item:nth-child(odd) { border-left: 0; }
  }

  /* ── ≤820 (React mobile breakpoint) ─────────────────────────────────── */
  @media (max-width: 820px) {
    .spk-x-features:not(.spk-x-features--d-quick) .spk-x-features__shell { width: calc(100% - 34px); }

    .spk-x-features--f-about { padding: 58px 0; }
    .spk-x-features--f-about .spk-x-features__title { font-size: clamp(28px, 8vw, 38px); }
    .spk-x-features--d-capabilities .spk-x-features__grid { grid-template-columns: 1fr; }
    .spk-x-features--d-capabilities .spk-x-features__item { grid-template-rows: 190px auto; }
    .spk-x-features--d-stories .spk-x-features__grid { grid-template-columns: 1fr; }
    .spk-x-features--d-stories .spk-x-features__item { grid-template-rows: 210px 1fr; min-height: 0; }
    .spk-x-features--d-workflow .spk-x-features__grid { grid-template-columns: 1fr; padding-top: 8px; }
    .spk-x-features--d-workflow .spk-x-features__item { border-top: 1px solid var(--spkf-line); padding-top: 22px; }
    .spk-x-features--d-people .spk-x-features__grid { grid-template-columns: 1fr; }
    .spk-x-features--d-quality .spk-x-features__grid { grid-template-columns: 1fr; }
    .spk-x-features--d-quality .spk-x-features__item { min-height: 0; }

    .spk-x-features--d-startup .spk-x-features__grid { grid-template-columns: 1fr; gap: 18px; }
    .spk-x-features--d-startup .spk-x-features__item:not(:last-child)::after { display: none; }
    .spk-x-features--d-aftersales .spk-x-features__grid { grid-template-columns: 1fr; }
    .spk-x-features--d-aftersales .spk-x-features__item { grid-template-columns: 1fr; }
    .spk-x-features--d-aftersales .spk-x-features__media img { min-height: 210px; }

    .spk-x-features--f-knowledge .spk-x-features__head { max-width: 100%; }
    .spk-x-features--f-knowledge .spk-x-features__title { font-size: clamp(25px, 6.8vw, 30px); }
    .spk-x-features--d-questions .spk-x-features__grid,
    .spk-x-features--d-topics .spk-x-features__grid,
    .spk-x-features--d-pathways .spk-x-features__grid { grid-template-columns: 1fr; }
    .spk-x-features--d-questions .spk-x-features__item,
    .spk-x-features--d-questions .spk-x-features__item:nth-child(even),
    .spk-x-features--d-topics .spk-x-features__item,
    .spk-x-features--d-topics .spk-x-features__item:nth-child(even) { border-left: 0; min-height: 0; }
    .spk-x-features--d-questions .spk-x-features__item + .spk-x-features__item,
    .spk-x-features--d-topics .spk-x-features__item + .spk-x-features__item { border-top: 1px solid var(--spkf-line); }
    .spk-x-features--d-questions .spk-x-features__item-title,
    .spk-x-features--d-topics .spk-x-features__item-title,
    .spk-x-features--d-pathways .spk-x-features__item-title { font-size: 17px; }

    .spk-x-features--f-machine { padding: 58px 0; }
    .spk-x-features--f-machine .spk-x-features__title { font-size: clamp(30px, 9vw, 42px); }
    .spk-x-features--d-benefits .spk-x-features__grid,
    .spk-x-features--d-optional .spk-x-features__grid { grid-template-columns: 1fr; }
    .spk-x-features--d-benefits .spk-x-features__item {
      grid-template-columns: auto 32px 1fr;
      min-height: 0;
      padding: 22px;
    }
    .spk-x-features__panel { padding: 22px; }
    .spk-x-features--d-optional .spk-x-features__head { flex-direction: column; }
    .spk-x-features--d-overview { padding: 42px 0 58px; }

    .spk-x-features--d-quick .spk-x-features__grid { grid-template-columns: 1fr; }
    .spk-x-features--d-quick .spk-x-features__item,
    .spk-x-features--d-quick .spk-x-features__item:nth-child(odd) {
      display: grid;
      grid-template-columns: 38px 1fr;
      gap: 2px 12px;
      border-left: 0;
      border-top: 1px solid var(--spkf-line);
      padding: 16px 0 0;
    }
    .spk-x-features--d-quick .spk-x-features__icon { grid-row: span 2; margin: 0; }
  }

  /* ── ≤520 (React narrow-phone fixes, knowledge/article only) ────────── */
  @media (max-width: 520px) {
    /* 原先 max-width:356px / 文案 330px 是按 390 屏原型抄的定值,414/430 宽手机
       右侧会空出 ~57px。版心改为纯流式 calc(100% - 34px),与全站 820 以下一致。 */
    .spk-x-features--f-knowledge .spk-x-features__shell {
      width: calc(100% - 34px);
      max-width: none;
      margin-right: auto;
      margin-left: 17px;
    }
    .spk-x-features--f-knowledge .spk-x-features__head--center { text-align: left; }
    .spk-x-features--f-knowledge .spk-x-features__title,
    .spk-x-features--f-knowledge .spk-x-features__lead p,
    .spk-x-features--f-knowledge .spk-x-features__text p {
      max-width: 100%;
      overflow-wrap: anywhere;
    }
    .spk-x-features--f-knowledge .spk-x-features__head--center .spk-x-features__lead p { margin-inline: 0; }
    .spk-x-features--d-quick .spk-x-features__shell,
    .spk-x-features--d-quick .spk-x-features__head,
    .spk-x-features--d-quick .spk-x-features__grid { min-width: 0; max-width: 100%; }
    .spk-x-features--d-quick .spk-x-features__lead p,
    .spk-x-features--d-quick .spk-x-features__text p {
      max-width: 100%;
      overflow-wrap: anywhere;
    }
  }
}