/* Official site shell: header, landing CTA, footer, download page. */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 48;
  display: flex;
  height: 76px;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 4vw, 56px);
  border-bottom: 1px solid transparent;
  transition: background-color 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
}

.site-header.is-scrolled {
  border-bottom-color: rgba(35, 76, 126, 0.1);
  background: rgba(250, 253, 255, 0.82);
  -webkit-backdrop-filter: blur(20px) saturate(145%);
  backdrop-filter: blur(20px) saturate(145%);
}

.site-header__right {
  display: flex;
  align-items: center;
  gap: 22px;
}

.official-nav {
  display: flex;
  align-items: center;
  gap: 5px;
}

.official-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 34px;
  padding: 0 13px;
  border-radius: 999px;
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 560;
  text-decoration: none;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.official-nav a:hover {
  background: rgba(255, 255, 255, 0.56);
  color: var(--ink);
}

.official-nav a.is-active {
  color: var(--accent);
}

.official-nav a.is-active::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 13px;
  height: 2px;
  border-radius: 99px;
  background: var(--accent);
  transform: translateX(-50%);
}

.official-github {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 34px;
  padding: 0 11px;
  border: 1px solid rgba(35, 76, 126, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.5);
  color: var(--ink-soft);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.official-github:hover {
  border-color: rgba(31, 100, 221, 0.22);
  background: rgba(255, 255, 255, 0.8);
  transform: translateY(-1px);
}

.official-github .icon {
  width: 14px;
  height: 14px;
}

.official-github .icon--small {
  width: 10px;
  height: 10px;
  opacity: 0.55;
}

/* Landing cover */

.site-intro {
  display: flex;
  min-height: 100svh;
  align-items: center;
  justify-content: center;
  padding-top: 108px;
  padding-bottom: 96px;
}

.intro-inner {
  display: flex;
  width: min(100%, 980px);
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.intro-inner > .section-kicker {
  margin-bottom: 25px;
  color: var(--muted);
}

.intro-mark {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 26px;
}

.intro-mark__box {
  position: relative;
  display: grid;
  width: 54px;
  height: 54px;
  place-items: center;
  border-radius: 15px;
  background: var(--ink-deep);
  box-shadow: 0 14px 30px rgba(13, 45, 84, 0.16);
}

.intro-mark__box span {
  color: #fff;
  font-family: var(--font-serif);
  font-size: 35px;
  font-style: italic;
  line-height: 1;
  transform: translate(-1px, -1px);
}

.intro-mark__box i {
  position: absolute;
  right: 4px;
  bottom: 4px;
  width: 9px;
  height: 9px;
  border: 2px solid var(--ink-deep);
  border-radius: 50%;
  background: #79b6ff;
}

.intro-mark__name {
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 22px;
}

.intro-mark__name em {
  margin-left: 4px;
  color: var(--accent);
  font-family: var(--font-sans);
  font-size: 11px;
  font-style: normal;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.intro-title {
  margin: 0;
  color: var(--ink-deep);
  font-family: var(--font-serif);
  font-size: clamp(42px, 6.1vw, 78px);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 1.06;
}

.intro-title em {
  color: var(--accent);
  font-style: italic;
}

.intro-copy {
  max-width: 620px;
  margin: 24px 0 0;
  color: var(--ink-soft);
  font-size: clamp(13px, 1.25vw, 15px);
  line-height: 1.9;
}

.intro-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 9px;
  margin-top: 29px;
}

.intro-actions .button {
  height: 46px;
  padding: 0 20px;
  font-size: 12px;
}

.intro-download {
  min-width: 190px;
}

.intro-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px 16px;
  margin-top: 20px;
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.04em;
}

.intro-meta span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.intro-meta i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #51a47d;
  box-shadow: 0 0 0 3px rgba(81, 164, 125, 0.1);
}

.intro-inner .scroll-cue {
  margin-top: 48px;
}

/* Footer */

.official-footer {
  position: relative;
  z-index: 5;
  padding: 0 clamp(20px, 5vw, 72px);
  background: rgba(244, 250, 255, 0.84);
  border-top: 1px solid var(--line);
}

.official-footer__inner {
  display: flex;
  width: min(100%, 1180px);
  margin: 0 auto;
  justify-content: space-between;
  gap: 60px;
  padding: 52px 0 40px;
}

.official-footer__brand {
  max-width: 270px;
}

.official-footer__brand .brand {
  display: inline-flex;
}

.official-footer__brand p {
  margin: 15px 0 0;
  color: var(--faint);
  font-size: 10px;
  line-height: 1.8;
}

.official-footer__columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(115px, 1fr));
  gap: 44px;
  min-width: 400px;
}

.official-footer__columns h3 {
  margin: 0 0 13px;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.official-footer__columns a {
  display: block;
  width: fit-content;
  margin: 8px 0;
  color: var(--ink-soft);
  font-size: 10px;
  text-decoration: none;
  transition: color 0.2s ease;
}

.official-footer__columns a:hover {
  color: var(--accent);
}

.official-footer__bottom {
  display: flex;
  width: min(100%, 1180px);
  margin: 0 auto;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 0 22px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 7.5px;
  letter-spacing: 0.06em;
}

/* Download page */

.official-page {
  min-height: 100svh;
  padding-top: 76px;
}

.official-page__main {
  width: min(100% - 40px, 1080px);
  margin: 0 auto;
  padding: 70px 0 96px;
}

.download-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  align-items: center;
  gap: 54px;
  padding: 38px 0 44px;
}

.download-kicker {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.download-hero h1 {
  margin: 13px 0 0;
  color: var(--ink-deep);
  font-family: var(--font-serif);
  font-size: clamp(40px, 5.3vw, 65px);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 1.06;
}

.download-hero h1 em {
  color: var(--accent);
  font-style: italic;
}

.download-hero__copy {
  max-width: 520px;
  margin: 20px 0 0;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.9;
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin-top: 25px;
}

.download-actions .button {
  height: 47px;
  padding: 0 20px;
  font-size: 12px;
}

.download-note {
  margin-top: 13px;
  color: var(--faint);
  font-size: 8.5px;
  line-height: 1.6;
}

.download-card {
  padding: 25px;
  border: 1px solid rgba(255, 255, 255, 0.76);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.46);
  box-shadow: var(--shadow-md);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.download-card__os {
  display: flex;
  align-items: center;
  gap: 12px;
}

.download-card__os-icon {
  display: grid;
  width: 43px;
  height: 43px;
  place-items: center;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
}

.download-card__os b {
  display: block;
  color: var(--ink);
  font-size: 13px;
}

.download-card__os span {
  display: block;
  margin-top: 3px;
  color: var(--faint);
  font-size: 8px;
}

.download-card__rows {
  display: flex;
  flex-direction: column;
  margin-top: 20px;
  border-top: 1px solid var(--line);
}

.download-card__rows div {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: 9px;
}

.download-card__rows span {
  color: var(--faint);
}

.download-card__rows b {
  color: var(--ink-soft);
  font-weight: 600;
  text-align: right;
}

.download-card__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 17px;
  padding: 6px 9px;
  border-radius: 6px;
  background: rgba(81, 164, 125, 0.1);
  color: #3e8262;
  font-size: 8px;
}

.download-section {
  margin-top: 44px;
  padding-top: 27px;
  border-top: 1px solid var(--line);
}

.download-section h2 {
  margin: 0 0 18px;
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 27px;
  font-weight: 400;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 15px;
}

.download-step,
.download-info {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.38);
}

.download-step__num {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 8px;
  font-weight: 700;
}

.download-step h3,
.download-info h3 {
  margin: 11px 0 7px;
  color: var(--ink);
  font-size: 12px;
}

.download-step p,
.download-info p,
.download-info li {
  margin: 0;
  color: var(--ink-soft);
  font-size: 9.5px;
  line-height: 1.8;
}

.download-info ul {
  margin: 8px 0 0;
  padding-left: 16px;
}

.download-warning {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 30px;
  padding: 15px 17px;
  border: 1px solid rgba(168, 106, 47, 0.17);
  border-radius: 10px;
  background: rgba(251, 245, 235, 0.62);
  color: #8f652f;
  font-size: 9.5px;
  line-height: 1.8;
}

/* ---------- 版本下载 ---------- */

.download-releases__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 24px;
}

.download-releases__head p {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 9.5px;
}

.release-latest {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 20px 22px;
  border: 1px solid rgba(31, 100, 221, 0.19);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.64);
  box-shadow: var(--shadow-sm);
}

.release-latest__main {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.release-latest__tag {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.release-latest__version {
  margin-top: 5px;
  color: var(--ink-deep);
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.release-latest__meta {
  color: var(--faint);
  font-size: 9px;
}

.release-latest__file {
  margin-top: 2px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 8px;
  overflow-wrap: anywhere;
}

.release-latest__action {
  flex: 0 0 auto;
  height: 44px;
  padding: 0 19px;
  font-size: 11.5px;
}

.release-history {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.4);
  overflow: hidden;
}

.release-history summary {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 13px 18px;
  color: var(--ink-soft);
  font-size: 10px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

.release-history summary::-webkit-details-marker {
  display: none;
}

.release-history summary i {
  color: var(--faint);
  font-size: 8.5px;
  font-style: normal;
  font-weight: 500;
}

.release-history summary::after {
  content: '';
  width: 7px;
  height: 7px;
  margin-left: auto;
  border-right: 1.5px solid var(--faint);
  border-bottom: 1.5px solid var(--faint);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
}

.release-history[open] summary::after {
  transform: rotate(-135deg);
}

.release-history__list {
  padding: 0 18px 6px;
}

.release-history__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.release-history__row b {
  display: block;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
}

.release-history__row span {
  display: block;
  margin-top: 2px;
  color: var(--faint);
  font-size: 8.5px;
}

.release-history__link {
  flex: 0 0 auto;
  color: var(--accent);
  font-size: 9.5px;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 100, 221, 0.3);
}

.release-history__link:hover {
  border-bottom-color: currentColor;
}

.release-notes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 15px;
}

.release-note {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.38);
}

.release-note header {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.release-note header b {
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.release-note header span {
  color: var(--faint);
  font-size: 8.5px;
}

.release-note ul {
  margin: 10px 0 0;
  padding-left: 16px;
}

.release-note li {
  color: var(--ink-soft);
  font-size: 9.5px;
  line-height: 1.85;
}

@media (max-width: 760px) {
  .release-latest {
    flex-direction: column;
    align-items: flex-start;
  }

  .release-latest__action {
    width: 100%;
  }

  .release-notes {
    grid-template-columns: minmax(0, 1fr);
  }
}

.download-warning svg {
  flex: 0 0 auto;
  margin-top: 2px;
}

/* Docs page */

.docs-page {
  background: #fff;
}

.docs-header {
  border-bottom: 1px solid rgba(35, 76, 126, 0.11);
  background: rgba(255, 255, 255, 0.9);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.docs-layout {
  display: grid;
  grid-template-columns: 238px minmax(0, 760px) minmax(150px, 190px);
  gap: 42px;
  width: min(100% - 48px, 1320px);
  margin: 0 auto;
  padding: 108px 0 90px;
  align-items: start;
}

.docs-sidebar {
  position: sticky;
  top: 100px;
  max-height: calc(100vh - 130px);
  overflow-y: auto;
  padding-right: 10px;
}

.docs-sidebar__title {
  margin: 0 0 17px;
  color: var(--ink);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.docs-nav-group {
  margin: 0 0 19px;
}

.docs-nav-group > span {
  display: block;
  margin-bottom: 7px;
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 7.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.docs-nav-group a {
  display: block;
  padding: 5px 9px;
  border-left: 2px solid transparent;
  color: var(--ink-soft);
  font-size: 10px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
}

.docs-nav-group a:hover {
  background: var(--accent-wash);
  color: var(--accent);
}

.docs-nav-group a.is-active {
  border-left-color: var(--accent);
  background: var(--accent-wash);
  color: var(--accent);
}

.docs-content {
  min-width: 0;
}

.docs-content h1 {
  margin: 0;
  color: #14243a;
  font-family: var(--font-serif);
  font-size: clamp(36px, 4.2vw, 53px);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 1.1;
}

.docs-content > .docs-lead {
  margin: 16px 0 0;
  color: #5d7187;
  font-size: 13px;
  line-height: 1.9;
}

.docs-content h2 {
  margin: 58px 0 16px;
  padding-top: 20px;
  border-top: 1px solid #e7edf4;
  color: #14243a;
  font-family: var(--font-sans);
  font-size: 22px;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.docs-content h2:first-of-type {
  margin-top: 35px;
}

.docs-content h3 {
  margin: 27px 0 9px;
  color: #20364f;
  font-size: 14px;
  font-weight: 650;
}

.docs-content p,
.docs-content li {
  color: #4b6076;
  font-size: 12px;
  line-height: 1.9;
}

.docs-content ul,
.docs-content ol {
  margin: 10px 0;
  padding-left: 21px;
}

.docs-content li {
  margin: 5px 0;
}

.docs-content strong {
  color: #20364f;
  font-weight: 650;
}

.docs-content code {
  padding: 2px 5px;
  border-radius: 4px;
  background: #f1f5fa;
  color: #1e4f91;
  font-family: var(--font-mono);
  font-size: 0.92em;
}

.docs-content pre {
  position: relative;
  overflow-x: auto;
  margin: 14px 0 19px;
  padding: 17px 19px;
  border-radius: 9px;
  background: #0d1b2e;
  color: #d7e5f4;
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.75;
}

.docs-content pre code {
  padding: 0;
  background: transparent;
  color: inherit;
  font-size: inherit;
}

.docs-table {
  width: 100%;
  margin: 15px 0 20px;
  border-collapse: collapse;
  font-size: 10px;
}

.docs-table th,
.docs-table td {
  padding: 9px 11px;
  border: 1px solid #e4ebf3;
  text-align: left;
  vertical-align: top;
  line-height: 1.65;
}

.docs-table th {
  background: #f6f9fc;
  color: #304860;
  font-weight: 650;
}

.docs-table td {
  color: #52677d;
}

.docs-table code {
  white-space: nowrap;
}

.docs-callout {
  margin: 18px 0;
  padding: 14px 16px;
  border-left: 3px solid var(--accent);
  border-radius: 0 7px 7px 0;
  background: #f4f8ff;
  color: #4b6076;
  font-size: 10px;
  line-height: 1.8;
}

.docs-callout strong {
  color: #1e4f91;
}

.docs-toc {
  position: sticky;
  top: 100px;
  padding-left: 16px;
  border-left: 1px solid #e7edf4;
}

.docs-toc h3 {
  margin: 0 0 11px;
  color: #6b7f95;
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.docs-toc a {
  display: block;
  margin: 7px 0;
  color: #7a8da1;
  font-size: 8.5px;
  line-height: 1.5;
  text-decoration: none;
}

.docs-toc a:hover {
  color: var(--accent);
}

.docs-footer {
  margin-top: 62px;
  padding-top: 20px;
  border-top: 1px solid #e7edf4;
  color: #8a9caf;
  font-size: 8.5px;
  line-height: 1.8;
}

.docs-footer a {
  color: var(--accent);
  text-decoration: none;
}

@media (max-width: 1080px) {
  .docs-layout {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 32px;
  }

  .docs-toc {
    display: none;
  }
}

@media (max-width: 820px) {
  .official-footer__inner {
    flex-direction: column;
    gap: 32px;
  }

  .official-footer__columns {
    min-width: 0;
    gap: 24px;
  }

  .download-hero {
    grid-template-columns: 1fr;
    gap: 30px;
  }

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

  .docs-layout {
    display: block;
    padding-top: 95px;
  }

  .docs-sidebar {
    position: static;
    max-height: none;
    margin-bottom: 32px;
    padding: 0;
    border-bottom: 1px solid #e7edf4;
  }

  .docs-sidebar .docs-nav-group {
    display: inline-block;
    min-width: 46%;
    vertical-align: top;
  }
}

@media (max-width: 680px) {
  .site-header {
    height: 64px;
    padding: 0 16px;
  }

  .site-header .brand__cn {
    display: none;
  }

  .site-header__right {
    gap: 4px;
  }

  .official-nav {
    gap: 0;
  }

  .official-nav a {
    padding: 0 8px;
    font-size: 11px;
  }

  .official-github {
    width: 32px;
    height: 32px;
    justify-content: center;
    padding: 0;
  }

  .official-github span,
  .official-github .icon--small {
    display: none;
  }

  .intro-inner > .section-kicker {
    margin-bottom: 18px;
  }

  .intro-mark__box {
    width: 46px;
    height: 46px;
  }

  .intro-mark__box span {
    font-size: 29px;
  }

  .intro-mark__name {
    font-size: 19px;
  }

  .intro-title {
    font-size: 40px;
  }

  .intro-copy {
    font-size: 12px;
  }

  .intro-actions {
    width: 100%;
    flex-direction: column;
  }

  .intro-actions .button {
    width: min(100%, 280px);
    justify-content: center;
  }

  .official-footer {
    padding: 0 18px;
  }

  .official-footer__columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

  .official-footer__bottom {
    flex-direction: column;
    gap: 5px;
  }

  .official-page__main {
    padding-top: 34px;
  }

  .download-hero h1 {
    font-size: 39px;
  }

  .download-actions {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
  }

  .download-actions .button {
    justify-content: center;
  }

  .docs-layout {
    width: min(100% - 32px, 760px);
  }

  .docs-sidebar .docs-nav-group {
    display: block;
  }
}