:root {
      --bg: #f5f7fb;
      --surface: #ffffff;
      --line: #dde5f0;
      --line-soft: #ebf0f6;
      --text: #182436;
      --text-soft: #637089;
      --primary: #2f6df6;
      --primary-deep: #183b7a;
      --container: 1180px;
      --shadow: 0 18px 34px rgba(15, 23, 42, 0.07);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
      background: linear-gradient(180deg, #f5f7fb 0%, #eff3f8 100%);
      color: var(--text);
    }

    a { color: inherit; text-decoration: none; }
    .container { width: min(var(--container), calc(100% - 28px)); margin: 0 auto; }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 60;
      background: rgba(245, 247, 251, 0.94);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--line-soft);
    }

    .site-header__inner {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 0;
    }

    .brand__image {
      display: block;
      width: auto;
      height: 34px;
      max-width: 220px;
      object-fit: contain;
      mix-blend-mode: darken;
      opacity: 0.96;
      filter: saturate(0.86) contrast(0.94) brightness(1.01);
    }

    .nav {
      display: flex;
      align-items: center;
      gap: 24px;
      color: var(--text-soft);
      font-size: 14px;
      font-weight: 600;
    }

    .nav a:hover,
    .nav a.is-active { color: var(--text); }

    .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 46px;
      padding: 0 18px;
      border-radius: 14px;
      border: 1px solid transparent;
      font-size: 14px;
      font-weight: 800;
      transition: .2s ease;
      cursor: pointer;
      white-space: nowrap;
    }

    .button--primary {
      background: linear-gradient(180deg, #245ecb 0%, #173f8e 58%, #122f66 100%);
      color: #fff;
      border-color: #12346e;
      box-shadow: 0 14px 24px rgba(18, 47, 102, 0.24);
    }

    .hero {
      padding: 56px 0 24px;
    }

    .hero__inner {
      width: min(100%, 1120px);
      margin: 0 auto;
      display: grid;
      gap: 14px;
      justify-items: center;
      text-align: center;
    }

    .hero__eyebrow {
      display: inline-flex;
      align-items: center;
      min-height: 34px;
      padding: 0 14px;
      border-radius: 999px;
      background: #eaf1ff;
      color: var(--primary);
      font-size: 13px;
      font-weight: 800;
    }

    .hero h1 {
      margin: 0;
      font-size: clamp(40px, 5vw, 60px);
      line-height: 1.02;
      letter-spacing: -0.055em;
      color: #182844;
    }

    .hero__meta {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .hero__meta span {
      min-height: 34px;
      display: inline-flex;
      align-items: center;
      padding: 0 14px;
      border-radius: 999px;
      background: #ffffff;
      border: 1px solid #dbe6f4;
      color: #49607f;
      font-size: 13px;
      font-weight: 700;
      box-shadow: 0 8px 18px rgba(20, 35, 70, 0.05);
    }

    .faq-layout {
      width: min(100%, 1120px);
      margin: 0 auto;
      display: grid;
      gap: 18px;
      padding-bottom: 46px;
    }

    .faq-nav {
      border: 1px solid #dbe4ef;
      border-radius: 18px;
      background: linear-gradient(180deg, #ffffff 0%, #fbfdff 100%);
      box-shadow: var(--shadow);
      padding: 14px;
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .faq-nav a {
      min-height: 38px;
      display: inline-flex;
      align-items: center;
      padding: 0 12px;
      border-radius: 999px;
      background: #f6f9ff;
      border: 1px solid #dde7f6;
      color: #51627c;
      font-size: 13px;
      font-weight: 700;
    }

    .faq-nav a:hover {
      background: #eaf1ff;
      color: var(--primary);
    }

    .faq-group {
      border: 1px solid #dbe4ef;
      border-radius: 22px;
      background: linear-gradient(180deg, rgba(255,255,255,0.96) 0%, rgba(249,252,255,0.94) 100%);
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .faq-group__head {
      padding: 24px 26px 18px;
      border-bottom: 1px solid var(--line-soft);
      background: linear-gradient(180deg, #ffffff 0%, #f9fbff 100%);
      display: grid;
      gap: 10px;
    }

    .faq-group__eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: #4b67a1;
      font-size: 12px;
      font-weight: 800;
      letter-spacing: 0.06em;
      text-transform: uppercase;
    }

    .faq-group__icon {
      width: 28px;
      height: 28px;
      border-radius: 999px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #1c4fa3;
      color: #ffffff;
      flex: 0 0 auto;
    }

    .faq-group__icon svg {
      width: 14px;
      height: 14px;
      stroke: currentColor;
      fill: none;
      stroke-width: 2;
      stroke-linecap: round;
      stroke-linejoin: round;
    }

    .faq-group__head h2 {
      margin: 0;
      font-size: 28px;
      line-height: 1.16;
      letter-spacing: -0.04em;
      color: #1d2d4b;
    }

    .faq-group__head p {
      margin: 0;
      color: #66768f;
      font-size: 15px;
      line-height: 1.92;
      max-width: 760px;
    }

    .faq-group__body {
      padding: 18px 20px 22px;
      display: grid;
      gap: 12px;
    }

    .faq-item {
      border: 1px solid #dbe4ef;
      border-radius: 18px;
      background: linear-gradient(180deg, #ffffff 0%, #fbfdff 100%);
      box-shadow: 0 14px 28px rgba(20, 35, 70, 0.08);
      overflow: hidden;
    }

    .faq-item summary {
      list-style: none;
      cursor: pointer;
      padding: 18px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
    }

    .faq-item summary::-webkit-details-marker { display: none; }

    .faq-item__title {
      font-size: 17px;
      font-weight: 800;
      color: #203252;
      letter-spacing: -0.02em;
      line-height: 1.5;
    }

    .faq-item__toggle {
      width: 28px;
      height: 28px;
      border-radius: 999px;
      background: #eef4ff;
      color: var(--primary-deep);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 700;
      flex: 0 0 auto;
      transition: .2s ease;
    }

    .faq-item[open] .faq-item__toggle {
      transform: rotate(45deg);
      background: #dfeaff;
    }

    .faq-item__body {
      padding: 0 18px 18px;
      color: #62728b;
      font-size: 14px;
      line-height: 1.92;
    }

    .site-footer {
      padding: 24px 0 36px;
    }

    .site-footer__inner {
      border-top: 1px solid var(--line);
      padding-top: 28px;
      display: grid;
      grid-template-columns: 1.5fr repeat(4, minmax(0, 1fr));
      gap: 24px;
    }

    .site-footer__brand {
      display: grid;
      gap: 14px;
      max-width: 360px;
    }

    .site-footer__brand-head {
      display: inline-flex;
      align-items: center;
      gap: 12px;
    }

    .site-footer__brand-image {
      display: block;
      width: auto;
      height: 32px;
      max-width: 180px;
      object-fit: contain;
      mix-blend-mode: darken;
      opacity: 0.96;
      filter: saturate(0.86) contrast(0.94) brightness(1.01);
    }

    .site-footer__brand-text {
      margin: 0;
      color: var(--text-soft);
      font-size: 14px;
      line-height: 1.9;
    }

    .site-footer__column-title {
      margin: 0 0 14px;
      font-size: 16px;
      color: var(--text);
      letter-spacing: -0.02em;
    }

    .site-footer__links {
      list-style: none;
      margin: 0;
      padding: 0;
      display: grid;
      gap: 10px;
    }

    .site-footer__links a,
    .site-footer__text {
      color: var(--text-soft);
      font-size: 14px;
      line-height: 1.8;
    }

    .site-footer__bottom {
      margin-top: 24px;
      padding-top: 16px;
      border-top: 1px solid #e5ebf3;
      color: #7a879d;
      font-size: 13px;
      line-height: 1.8;
    }

    @media (max-width: 1024px) {
      .site-footer__inner {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 720px) {
      .site-header__inner {
        min-height: auto;
        padding: 14px 0;
        flex-direction: column;
        align-items: flex-start;
      }

      .nav {
        flex-wrap: wrap;
        gap: 12px 16px;
      }

      .hero__inner {
        padding: 0 18px;
      }

      .container { width: min(var(--container), calc(100% - 20px)); }
    }


.site-footer__social {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 4px;
}

.social-link {
  width: 44px;
  height: 44px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  border: 1px solid #dbe4ef;
  box-shadow: 0 10px 18px rgba(20, 35, 70, 0.06);
  transition: .2s ease;
}

.social-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 22px rgba(20, 35, 70, 0.10);
}

.social-link svg {
  width: 22px;
  height: 22px;
  display: block;
}

.social-link--facebook svg {
  fill: #1877f2;
}

.social-link--x svg {
  fill: #111111;
}

.social-link--youtube svg {
  fill: #ff0000;
}