.dfm-page {
    --dfm-navy: #203f67;
    --dfm-navy-dark: #172f4e;
    --dfm-teal: #0799a5;
    --dfm-teal-dark: #087f8a;
    --dfm-title: #172334;
    --dfm-body: #5c6875;
    --dfm-muted: #7c8995;
    --dfm-bg: #ffffff;
    --dfm-tint: #f4f7f9;
    --dfm-border: #dfe7ec;
    width: 100%;
    overflow: hidden;
    background: var(--dfm-bg);
    box-sizing: border-box;
  }
  .dfm-page, .dfm-page * { box-sizing: border-box; }
  .dfm-wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 24px; }
  .dfm-wrap--narrow { max-width: 860px; }

  /* ① Hero */
  .dfm-hero { padding: 58px 0 46px; background: linear-gradient(160deg, #f5f8fa 0%, #ffffff 70%); border-bottom: 1px solid var(--dfm-border); }
  .dfm-eyebrow { margin: 0 0 10px; color: var(--dfm-teal); font-size: 12px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
  .dfm-h1 { margin: 0; color: var(--dfm-title); font-size: clamp(32px, 4vw, 48px); font-weight: 730; line-height: 1.12; letter-spacing: -.025em; }
  .dfm-sub { max-width: 720px; margin: 14px 0 0; color: var(--dfm-navy); font-size: 17px; font-weight: 600; line-height: 1.5; }
  .dfm-intro { max-width: 780px; margin: 14px 0 0; color: var(--dfm-body); font-size: 14px; line-height: 1.72; }

  /* 按钮 */
  .dfm-btn { width: fit-content; min-height: 47px; margin-top: 22px; padding: 12px 20px; display: inline-flex; align-items: center; gap: 14px; color: #fff !important; background: var(--dfm-teal); border: 1px solid var(--dfm-teal); font-size: 13px; font-weight: 700; text-decoration: none !important; transition: all .2s ease; }
  .dfm-btn:hover, .dfm-btn:focus-visible { background: var(--dfm-teal-dark); border-color: var(--dfm-teal-dark); transform: translateY(-2px); box-shadow: 0 10px 22px rgba(7,153,165,.2); }
  .dfm-btn--lg { min-height: 52px; font-size: 14px; padding: 14px 24px; }
  .dfm-btn:focus-visible { outline: 3px solid rgba(7,153,165,.25); outline-offset: 4px; }

  /* 通用章节 */
  .dfm-section { padding: 44px 0; }
  .dfm-section--tint { background: var(--dfm-tint); border-top: 1px solid var(--dfm-border); border-bottom: 1px solid var(--dfm-border); }
  .dfm-section--flush { padding: 30px 0; }
  .dfm-h2 { margin: 0 0 14px; color: var(--dfm-title); font-size: clamp(24px, 2.6vw, 32px); font-weight: 730; line-height: 1.2; letter-spacing: -.02em; }
  .dfm-lead { max-width: 760px; margin: 0; color: var(--dfm-body); font-size: 14px; line-height: 1.7; }
  .dfm-para { max-width: 860px; margin: 12px 0 0; color: var(--dfm-body); font-size: 14px; line-height: 1.72; }
  .dfm-fig { display: block; width: 100%; max-width: 980px; height: auto; margin: 24px auto 0; border: 1px solid var(--dfm-border); border-radius: 8px; box-shadow: 0 10px 28px rgba(23,47,78,.08); }

  /* 交付物 / 流程网格 */
  .dfm-grid { display: grid; gap: 14px; margin-top: 22px; }
  .dfm-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .dfm-card { padding: 18px 16px; border: 1px solid var(--dfm-border); background: #fff; border-radius: 6px; }
  .dfm-card h3 { margin: 0 0 6px; color: var(--dfm-navy); font-size: 14px; font-weight: 750; line-height: 1.35; }
  .dfm-card p { margin: 0; color: var(--dfm-body); font-size: 12px; line-height: 1.6; }
  .dfm-steps { counter-reset: none; }
  .dfm-step { position: relative; padding: 18px 16px; border: 1px solid var(--dfm-border); background: #fff; border-radius: 6px; }
  .dfm-step-n { display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; margin-bottom: 10px; border-radius: 50%; color: #fff; background: var(--dfm-teal); font-size: 13px; font-weight: 800; }
  .dfm-step h3 { margin: 0 0 6px; color: var(--dfm-navy); font-size: 14px; font-weight: 750; }
  .dfm-step p { margin: 0; color: var(--dfm-body); font-size: 12px; line-height: 1.6; }

  /* FAQ */
  .dfm-faq { border: 1px solid var(--dfm-border); background: #fff; margin-top: 12px; border-radius: 6px; }
  .dfm-faq summary { padding: 14px 18px; color: var(--dfm-navy); font-size: 14px; font-weight: 700; cursor: pointer; list-style-position: inside; }
  .dfm-faq[open] summary { border-bottom: 1px solid var(--dfm-border); background: var(--dfm-tint); }
  .dfm-faq p { margin: 0; padding: 14px 18px; color: var(--dfm-body); font-size: 13px; line-height: 1.7; }

  /* CTA */
  .dfm-cta { padding: 50px 0; background: var(--dfm-navy); }
  .dfm-cta__inner { text-align: center; }
  .dfm-cta__title { margin: 0; color: #fff; font-size: clamp(24px, 2.8vw, 34px); font-weight: 730; }
  .dfm-cta__text { max-width: 640px; margin: 12px auto 0; color: rgba(255,255,255,.78); font-size: 14px; line-height: 1.7; }
  .dfm-cta .dfm-btn { margin-top: 24px; }

  /* 响应式 */
  @media (max-width: 980px) { .dfm-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
  @media (max-width: 640px) {
    .dfm-hero { padding: 40px 0 34px; }
    .dfm-section { padding: 32px 0; }
    .dfm-grid--4 { grid-template-columns: 1fr; }
    .dfm-wrap { padding: 0 16px; }
  }
  @media (prefers-reduced-motion: reduce) { .dfm-btn, .dfm-btn svg { transition: none; } }