:root {
      --bg: #f5f7fb;
      --surface: #ffffff;
      --surface-soft: #f8fbff;
      --line: #dde5f0;
      --line-soft: #ebf0f6;
      --text: #182436;
      --text-soft: #637089;
      --primary: #2f6df6;
      --primary-hover: #2158d1;
      --primary-soft: #eaf1ff;
      --primary-deep: #183b7a;
      --primary-deeper: #0f2b5d;
      --success: #1f9a67;
      --danger: #cf3d4f;
      --info: #2f6df6;
      --container: 1180px;
      --shadow: 0 16px 32px rgba(15, 23, 42, 0.06);
      --shadow-strong: 0 22px 42px rgba(15, 32, 66, 0.12);
      --radius-lg: 20px;
      --radius-md: 14px;
    }

    * { 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;
      color: #1d2d52;
    }

    .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); }

    .download-shell {
      padding: 34px 0 48px;
    }

    .download-layout {
      display: grid;
      grid-template-columns: 196px minmax(0, 1fr);
      gap: 20px;
      align-items: start;
    }

    .side-nav {
      position: sticky;
      top: 96px;
      border: 1px solid #dfe7f2;
      border-radius: 18px;
      background: rgba(255,255,255,0.9);
      box-shadow: 0 14px 28px rgba(20, 35, 70, 0.06);
      padding: 14px;
    }

    .side-nav__title {
      margin: 0 0 10px;
      font-size: 13px;
      color: #3f5271;
      text-transform: uppercase;
      letter-spacing: 0.08em;
    }

    .side-nav__list {
      display: grid;
      gap: 6px;
    }

    .side-nav__list a {
      min-height: 38px;
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 0 10px;
      border-radius: 10px;
      color: #506179;
      font-size: 13px;
      font-weight: 700;
      transition: .2s ease;
    }

    .side-nav__list a::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: #d3deed;
      flex: 0 0 auto;
      transition: .2s ease;
    }

    .side-nav__list a:hover,
    .side-nav__list a.is-active {
      background: var(--primary-soft);
      color: var(--primary);
    }

    .side-nav__list a:hover::before,
    .side-nav__list a.is-active::before {
      background: var(--primary);
      box-shadow: 0 0 0 4px rgba(47,109,246,0.12);
    }

    .content-flow {
      display: grid;
      gap: 18px;
    }

    .doc-panel {
      border: 1px solid #dbe4f0;
      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-strong);
      overflow: hidden;
    }

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

    .doc-panel__eyebrow {
      display: inline-flex;
      align-items: center;
      min-height: 30px;
      padding: 0 12px;
      border-radius: 999px;
      background: var(--primary-soft);
      color: var(--primary);
      font-size: 12px;
      font-weight: 800;
      letter-spacing: 0.04em;
      text-transform: uppercase;
    }

    .doc-panel__head h1,
    .doc-panel__head h2 {
      margin: 14px 0 0;
      font-size: clamp(30px, 4vw, 44px);
      line-height: 1.08;
      letter-spacing: -0.05em;
    }

    .doc-panel__head h2 {
      font-size: 28px;
      line-height: 1.16;
    }

    .doc-panel__head p {
      margin: 14px 0 0;
      max-width: 820px;
      color: var(--text-soft);
      font-size: 15px;
      line-height: 1.9;
    }

    .doc-panel__body {
      padding: 22px 26px 26px;
    }

    .release-module {
      border-radius: 26px;
      border: 1px solid #d7e2f2;
      background: linear-gradient(180deg, #ffffff 0%, #f7faff 100%);
      box-shadow: 0 24px 44px rgba(18, 36, 72, 0.10);
      padding: 36px 30px 32px;
      display: grid;
      gap: 22px;
      justify-items: center;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .release-module::before {
      content: "";
      position: absolute;
      top: -80px;
      right: -80px;
      width: 220px;
      height: 220px;
      border-radius: 50%;
      background: radial-gradient(circle at center, rgba(24,59,122,0.12) 0%, rgba(24,59,122,0) 72%);
      pointer-events: none;
    }

    .release-module__header {
      display: grid;
      gap: 12px;
      max-width: 860px;
    }

    .release-module__header h2 {
      margin: 0;
      font-size: clamp(34px, 5vw, 50px);
      line-height: 1.08;
      letter-spacing: -0.05em;
      color: #1a2942;
    }

    .release-module__header p {
      margin: 0;
      color: var(--text-soft);
      font-size: 16px;
      line-height: 1.9;
    }

    .release-module__cta-wrap {
      display: grid;
      gap: 14px;
      justify-items: center;
    }

    .release-download-button {
      min-width: min(100%, 380px);
      min-height: 86px;
      padding: 10px 18px 10px 12px;
      border-radius: 22px;
      border: 1px solid #0f4ea7;
      background: linear-gradient(180deg, #20b2f1 0%, #1293db 18%, #0f6fc7 52%, #0f4ea7 100%);
      box-shadow: 0 16px 30px rgba(15, 78, 167, 0.32), inset 0 1px 0 rgba(255,255,255,0.28);
      display: inline-grid;
      grid-template-columns: 60px minmax(0, 1fr);
      align-items: center;
      gap: 14px;
      color: #fff;
      transition: .2s ease;
      position: relative;
      overflow: hidden;
    }

    .release-download-button::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(255,255,255,0.16) 0%, rgba(255,255,255,0.02) 40%, rgba(255,255,255,0) 100%);
      pointer-events: none;
    }

    .release-download-button:hover {
      transform: translateY(-2px);
      box-shadow: 0 20px 36px rgba(15, 78, 167, 0.36), inset 0 1px 0 rgba(255,255,255,0.30);
    }

    .release-download-button__icon {
      width: 60px;
      height: 60px;
      border-radius: 18px;
      background: linear-gradient(180deg, rgba(255,255,255,0.14) 0%, rgba(255,255,255,0.06) 100%);
      border: 1px solid rgba(255,255,255,0.24);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: inset 0 1px 0 rgba(255,255,255,0.18);
      font-size: 24px;
      font-weight: 900;
      line-height: 1;
      position: relative;
      z-index: 1;
    }

    .release-download-button__text {
      display: grid;
      gap: 4px;
      text-align: left;
      position: relative;
      z-index: 1;
    }

    .release-download-button__eyebrow {
      font-size: 12px;
      font-weight: 800;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: rgba(255,255,255,0.80);
    }

    .release-download-button__title {
      font-size: 24px;
      font-weight: 900;
      letter-spacing: -0.03em;
      line-height: 1.1;
      color: #ffffff;
    }

    .release-download-button__sub {
      font-size: 13px;
      font-weight: 700;
      color: rgba(255,255,255,0.88);
    }

    .release-module__meta {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 12px 18px;
    }

    .release-module__meta span {
      min-height: 36px;
      display: inline-flex;
      align-items: center;
      padding: 0 14px;
      border-radius: 999px;
      background: #fff;
      border: 1px solid #e2eaf6;
      color: #485c79;
      font-size: 14px;
      font-weight: 700;
    }

    .release-module__rating {
      display: grid;
      gap: 6px;
      justify-items: center;
      color: #475b78;
      font-size: 14px;
      font-weight: 700;
    }

    .release-module__stars {
      letter-spacing: 0.18em;
      color: #f4b400;
      font-size: 24px;
      line-height: 1;
    }

    .release-module__hint {
      color: var(--success);
      font-size: 14px;
      font-weight: 700;
      line-height: 1.8;
    }

    .release-module__note-row {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px 18px;
      color: #61728c;
      font-size: 13px;
      font-weight: 700;
    }

    .release-module__note-row span {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .release-module__note-row span::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: #20a0e6;
      flex: 0 0 auto;
    }

    .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;
      gap: 8px;
    }

    .button::before {
      content: "";
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background: currentColor;
      opacity: 0.12;
      flex: 0 0 auto;
    }

    .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);
    }

    .button--primary:hover { transform: translateY(-1px); box-shadow: 0 18px 28px rgba(18, 47, 102, 0.28); }

    .button--secondary {
      background: linear-gradient(180deg, #ffffff 0%, #f7faff 100%);
      border-color: #d8e2f0;
      color: var(--primary-deep);
      box-shadow: 0 10px 18px rgba(18, 47, 102, 0.06);
    }

    .button--secondary:hover { background: #f8fbff; transform: translateY(-1px); }

    .support-list {
      display: grid;
      gap: 10px;
    }

    .support-head {
      display: grid;
      grid-template-columns: minmax(0, 1.8fr) 150px 120px;
      gap: 14px;
      padding: 0 6px 4px;
      color: #6d7c95;
      font-size: 12px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 0.06em;
    }

    .support-card {
      border: 1px solid #dbe4ef;
      border-radius: 16px;
      background: linear-gradient(180deg, #ffffff 0%, #fbfdff 100%);
      box-shadow: 0 8px 18px rgba(20, 35, 70, 0.05);
      padding: 14px 16px;
      display: grid;
      grid-template-columns: minmax(0, 1.8fr) 150px 120px;
      gap: 14px;
      align-items: center;
    }

    .support-card:nth-child(even) {
      background: linear-gradient(180deg, #fbfdff 0%, #f7faff 100%);
    }

    .support-card__main {
      min-width: 0;
      display: grid;
      grid-template-columns: 44px minmax(0, 1fr);
      gap: 12px;
      align-items: start;
    }

    .support-card__icon {
      width: 44px;
      height: 44px;
      border-radius: 999px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #1c4fa3;
      color: #ffffff;
      flex: 0 0 auto;
    }

    .support-card__icon svg {
      width: 20px;
      height: 20px;
      stroke: currentColor;
      fill: none;
      stroke-width: 2;
      stroke-linecap: round;
      stroke-linejoin: round;
    }

    .support-card__content {
      min-width: 0;
      display: grid;
      gap: 4px;
    }

    .support-card__title {
      font-size: 15px;
      font-weight: 800;
      color: #203252;
      letter-spacing: -0.02em;
      line-height: 1.6;
    }

    .support-card__desc {
      color: var(--text-soft);
      font-size: 13px;
      line-height: 1.75;
    }

    .support-card__meta {
      color: #64738b;
      font-size: 13px;
      font-weight: 700;
      text-align: left;
      line-height: 1.6;
    }

    .support-card__action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 36px;
      padding: 0 14px;
      border-radius: 999px;
      background: #eaf7f1;
      color: #1f9a67;
      font-size: 13px;
      font-weight: 800;
      justify-self: start;
      gap: 8px;
    }

    .support-card__action::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: currentColor;
      flex: 0 0 auto;
    }

    .ui-icon {
      width: 44px;
      height: 44px;
      border-radius: 999px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--icon-color, var(--primary-deep));
      color: #ffffff;
      flex: 0 0 auto;
    }

    .ui-icon--blue { --icon-color: #1c4fa3; }
    .ui-icon--green { --icon-color: #1f9a67; }
    .ui-icon--red { --icon-color: #cf3d4f; }

    .ui-icon svg {
      width: 20px;
      height: 20px;
      stroke: currentColor;
      fill: none;
      stroke-width: 2;
      stroke-linecap: round;
      stroke-linejoin: round;
    }

    .ui-icon svg.icon-fill {
      fill: currentColor;
      stroke: none;
    }

    .steps-list,
    .faq-list,
    .log-list {
      display: grid;
      gap: 12px;
    }

    .step-row,
    .faq-row,
    .log-row {
      border: 1px solid #dbe4ef;
      border-radius: 18px;
      background: linear-gradient(180deg, #ffffff 0%, #fbfdff 100%);
      padding: 18px;
      display: grid;
      gap: 12px;
      box-shadow: 0 14px 28px rgba(20, 35, 70, 0.08);
      position: relative;
      overflow: hidden;
    }

    .step-row::after,
    .faq-row::after,
    .log-row::after {
      content: "";
      position: absolute;
      inset: auto -24px -24px auto;
      width: 78px;
      height: 78px;
      border-radius: 50%;
      background: radial-gradient(circle at center, rgba(24,59,122,0.08) 0%, rgba(24,59,122,0) 72%);
      pointer-events: none;
    }

    .step-row {
      grid-template-columns: 56px minmax(0, 1fr);
      align-items: start;
      gap: 16px;
    }

    .step-row__num {
      width: 56px;
      height: 56px;
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(180deg, #234a8f 0%, #17376d 100%);
      color: #ffffff;
      font-size: 20px;
      font-weight: 800;
      box-shadow: 0 12px 20px rgba(15, 43, 93, 0.20);
    }

    .faq-row h3,
    .log-row h3,
    .step-row h3 {
      margin: 0;
      font-size: 18px;
      color: #203252;
      letter-spacing: -0.02em;
    }

    .card-block__content {
      display: grid;
      gap: 8px;
    }

    .faq-accordion {
      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__left {
      display: flex;
      align-items: center;
      gap: 12px;
      min-width: 0;
    }

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

    .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 74px;
      color: var(--text-soft);
      font-size: 14px;
      line-height: 1.85;
    }

    .faq-row p,
    .log-row p,
    .step-row p,
    .log-row ul {
      margin: 0;
      color: var(--text-soft);
      font-size: 14px;
      line-height: 1.85;
    }

    .log-row ul {
      padding-left: 18px;
    }

    .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__links a:hover { color: var(--text); }

    .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) {
      .download-layout {
        grid-template-columns: 1fr;
      }

      .side-nav {
        position: static;
      }

      .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;
      }

      .support-head,
      .support-card {
        grid-template-columns: 1fr;
      }

      .doc-panel__head,
      .doc-panel__body {
        padding-left: 18px;
        padding-right: 18px;
      }

      .step-row {
        grid-template-columns: 1fr;
      }
    }


.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;
}