:root {
  --hh-blue-dark: #0A1F44;
  --hh-blue-medium: #123367;
  --hh-blue-bright: #1A4A8A;
  --hh-orange: #FF6B35;
  --hh-blue-light: #E6EDF7;
  --hh-bg-light: #F5F7FA;
  --hh-gray: #6B7A90;
  --hh-gray-dark: #3D4C63;
  --hh-near-black: #071022;
  --hh-container: 75rem;
  --hh-hsp: 2rem;
  --hh-ease: cubic-bezier(.2, .8, .2, 1);
  --hh-font-display: "Arial Black", "Helvetica Neue", Arial, sans-serif;
  --hh-font-body: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  --hh-font-mono: Consolas, Monaco, "Courier New", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--hh-font-body);
  background: var(--hh-bg-light);
  color: var(--hh-near-black);
  line-height: 1.65;
}

h1, h2, h3, h4 {
  font-family: var(--hh-font-display);
  margin: 0 0 .9rem;
  line-height: 1.12;
  letter-spacing: .01em;
}

p {
  margin: 0 0 1rem;
}

a {
  color: var(--hh-blue-bright);
  text-decoration: none;
  background-color: transparent;
}

a:hover {
  color: var(--hh-orange);
}

ul, ol {
  padding-left: 1.2rem;
}

img {
  max-width: 100%;
  height: auto;
  border: 0;
}

:focus-visible {
  outline: 3px solid var(--hh-orange);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection {
  background: var(--hh-orange);
  color: #fff;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--hh-orange);
  color: #fff;
  padding: .75rem 1rem;
  font-weight: 700;
  z-index: 300;
}

.skip-link:focus {
  left: 0;
  top: 0;
}

.site-announcement {
  background: var(--hh-near-black);
  color: rgba(230, 237, 247, .85);
  font-family: var(--hh-font-mono);
  font-size: .75rem;
  letter-spacing: .06em;
  text-align: center;
  padding: .5rem 1rem;
  margin: 0;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}

.site-announcement::before {
  content: "●";
  color: var(--hh-orange);
  margin-right: .5rem;
  font-size: .65rem;
  vertical-align: middle;
}

.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 120;
  background: var(--hh-blue-dark);
  color: var(--hh-blue-light);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 22%;
  height: 3px;
  background: var(--hh-orange);
  z-index: 3;
}

.site-header__progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  background: var(--hh-orange);
  transform: scaleX(0);
  transform-origin: 0 50%;
  z-index: 5;
  pointer-events: none;
}

.site-header__inner {
  max-width: var(--hh-container);
  margin: 0 auto;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 0 var(--hh-hsp);
  min-height: 4.5rem;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  font-family: var(--hh-font-display);
  font-size: 1.45rem;
  letter-spacing: .02em;
  color: #fff;
  position: relative;
  z-index: 2;
  white-space: nowrap;
}

.site-header__brand:hover {
  color: #fff;
}

.brand-mark {
  position: relative;
  display: inline-block;
  width: 2rem;
  height: 1.7rem;
  flex: 0 0 auto;
  background: rgba(255, 255, 255, .08);
  border: 2px solid var(--hh-orange);
  transform: skew(-18deg);
}

.brand-mark::before {
  content: "";
  position: absolute;
  top: 3px;
  bottom: 3px;
  right: 3px;
  width: 9px;
  border-right: 2px solid #fff;
}

.brand-mark::after {
  content: "";
  position: absolute;
  right: 3px;
  top: 3px;
  width: 8px;
  height: 2px;
  background: #fff;
}

.site-header__word {
  color: #fff;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: stretch;
}

.site-nav__list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: .15rem;
  align-items: stretch;
}

.site-nav__item {
  display: flex;
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 4.5rem;
  padding: 0 1rem;
  font-size: .875rem;
  font-weight: 700;
  color: rgba(230, 237, 247, .82);
  letter-spacing: .04em;
  border-left: 1px solid rgba(255, 255, 255, .06);
  transition: color .2s, background .2s;
  white-space: nowrap;
}

.site-nav__link:hover {
  color: #fff;
  background: rgba(255, 255, 255, .04);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: .85rem;
  right: .85rem;
  bottom: 0;
  height: 3px;
  background: var(--hh-orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s var(--hh-ease);
}

.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.site-nav__link[aria-current="page"] {
  color: #fff;
}

.site-nav__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  min-width: 3.4rem;
  min-height: 3.4rem;
  padding: .55rem .65rem;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, .22);
  color: var(--hh-blue-light);
  cursor: pointer;
  gap: .14rem;
  border-radius: 0;
}

.site-nav__toggle:hover {
  border-color: var(--hh-orange);
}

.site-nav__toggle .nav-toggle__bar {
  display: block;
  width: 1.3rem;
  height: 2px;
  background: #fff;
  transition: transform .22s var(--hh-ease), opacity .18s;
}

.site-nav__toggle-text {
  display: block;
  font-size: .65rem;
  font-family: var(--hh-font-mono);
  letter-spacing: .08em;
  color: rgba(230, 237, 247, .75);
  margin-top: .12rem;
}

.site-nav__toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.site-nav__toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.site-nav__toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

@media (max-width: 60rem) {
  .site-header__inner {
    padding: 0 1.25rem;
    gap: 1rem;
  }

  .site-nav {
    margin-left: 0;
    position: absolute;
    left: 1.25rem;
    right: 1.25rem;
    top: calc(100% + .35rem);
    display: none;
    align-items: stretch;
    background: var(--hh-blue-medium);
    border: 1px solid rgba(255, 255, 255, .12);
    border-top: 3px solid var(--hh-orange);
    box-shadow: 0 18px 30px rgba(7, 16, 34, .35);
    z-index: 50;
  }

  .site-nav[data-open="true"] {
    display: flex;
  }

  .site-nav__list {
    flex-direction: column;
    width: 100%;
    margin: 0;
    padding: .35rem 0 .8rem;
    gap: 0;
  }

  .site-nav__item {
    display: block;
  }

  .site-nav__link {
    display: flex;
    min-height: 3.1rem;
    padding: 0 1.1rem;
    border-left: 0;
    border-bottom: 1px solid rgba(255, 255, 255, .08);
    font-size: .9rem;
  }

  .site-nav__link::after {
    display: none;
  }

  .site-nav__link[aria-current="page"] {
    background: rgba(255, 107, 53, .16);
    color: #fff;
  }

  .site-nav__toggle {
    display: inline-flex;
  }
}

.site-footer {
  position: relative;
  background: var(--hh-blue-dark);
  color: var(--hh-blue-light);
  border-top: 4px solid var(--hh-orange);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  right: -4rem;
  bottom: -5rem;
  width: 16rem;
  height: 16rem;
  border: 2px solid rgba(255, 255, 255, .05);
  transform: rotate(45deg);
  pointer-events: none;
}

.site-footer__inner {
  position: relative;
  max-width: var(--hh-container);
  margin: 0 auto;
  padding: 3rem var(--hh-hsp) 1.5rem;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.35fr;
  gap: 3rem;
  align-items: start;
}

.site-footer__brand {
  display: flex;
  align-items: center;
  gap: .8rem;
  font-family: var(--hh-font-display);
  font-size: 1.4rem;
  color: #fff;
  letter-spacing: .02em;
}

.site-footer__brand .brand-mark {
  border-color: var(--hh-orange);
}

.site-footer__tagline {
  margin: 1rem 0 0;
  max-width: 34rem;
  font-size: .875rem;
  color: rgba(230, 237, 247, .62);
}

.site-footer__heading {
  display: block;
  margin: 0 0 .9rem;
  font-family: var(--hh-font-display);
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--hh-orange);
}

.site-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .5rem;
}

.site-footer__link {
  display: inline-block;
  font-size: .875rem;
  color: rgba(230, 237, 247, .72);
  transition: color .2s;
}

.site-footer__link:hover {
  color: var(--hh-orange);
}

.site-footer__contact {
  font-size: .875rem;
  color: rgba(230, 237, 247, .75);
}

.site-footer__contact p {
  margin: .35rem 0;
}

.site-footer__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, .12);
  font-size: .75rem;
  color: rgba(230, 237, 247, .55);
}

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}

.site-footer__legal a {
  color: rgba(230, 237, 247, .7);
  font-size: .75rem;
}

.site-footer__legal a:hover {
  color: var(--hh-orange);
}

.site-footer__icp {
  font-family: var(--hh-font-mono);
  letter-spacing: .04em;
}

.site-footer__copy {
  margin: 0;
}

.site-footer__note {
  max-width: 56rem;
  margin-top: 1rem;
  font-size: .75rem;
  color: rgba(230, 237, 247, .55);
}

@media (max-width: 56rem) {
  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.container {
  width: min(100% - 2rem, var(--hh-container));
  margin-inline: auto;
}

.site-main {
  display: block;
  width: 100%;
  min-height: 70vh;
  overflow: clip;
}

.section-block {
  position: relative;
  padding: clamp(2.5rem, 7vw, 5.5rem) 0;
}

.section-block--light {
  background: var(--hh-bg-light);
  color: var(--hh-near-black);
}

.section-block--tint {
  background: var(--hh-blue-light);
  color: var(--hh-near-black);
}

.section-block--dark {
  background: var(--hh-blue-dark);
  color: var(--hh-blue-light);
}

.section-block--medium {
  background: var(--hh-blue-medium);
  color: var(--hh-blue-light);
}

.section-block--orange {
  background: var(--hh-orange);
  color: #071022;
}

.section-index {
  display: flex;
  align-items: center;
  gap: .8rem;
  font-family: var(--hh-font-mono);
  font-size: .8rem;
  letter-spacing: .18em;
  color: var(--hh-orange);
  text-transform: uppercase;
}

.section-index::after {
  content: "";
  width: 4rem;
  height: 1px;
  background: var(--hh-orange);
  opacity: .6;
}

.section-title {
  margin: .5rem 0 1rem;
  font-size: clamp(1.9rem, 4vw, 3rem);
  color: inherit;
}

.section-subtitle {
  max-width: 60ch;
  font-size: 1rem;
  color: inherit;
  opacity: .75;
  margin-bottom: 2rem;
}

.section-foot {
  margin-top: 2.5rem;
}

.grid {
  display: grid;
  gap: var(--hh-hsp);
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid--tight {
  gap: 1rem;
}

@media (max-width: 64rem) {
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 48rem) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  min-height: 2.8rem;
  padding: .6rem 1.3rem;
  border: 1px solid transparent;
  font-family: var(--hh-font-display);
  font-size: .82rem;
  letter-spacing: .06em;
  background: transparent;
  color: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: transform .2s var(--hh-ease), background .2s, color .2s, border-color .2s, box-shadow .2s;
}

.button:hover {
  text-decoration: none;
  transform: translateY(-2px);
}

.button:active {
  transform: translateY(0);
}

.button--primary {
  background: var(--hh-orange);
  border-color: var(--hh-orange);
  color: #fff;
}

.button--primary:hover {
  box-shadow: 0 6px 16px rgba(255, 107, 53, .28);
  color: #fff;
}

.button--outline {
  border-color: rgba(255, 255, 255, .45);
  color: #fff;
}

.button--outline:hover {
  background: rgba(255, 255, 255, .1);
  color: #fff;
}

.button--dark {
  background: var(--hh-blue-dark);
  border-color: var(--hh-blue-dark);
  color: #fff;
}

.button--light {
  background: var(--hh-blue-light);
  color: var(--hh-blue-dark);
}

.button--small {
  min-height: 2.1rem;
  padding: .3rem .85rem;
  font-size: .72rem;
}

.docs-meta {
  font-family: var(--hh-font-mono);
  font-size: .75rem;
  color: var(--hh-gray);
  letter-spacing: .05em;
}

.docs-meta strong {
  color: var(--hh-blue-dark);
}

.tag {
  display: inline-block;
  margin: .2rem .3rem .2rem 0;
  padding: .22rem .6rem;
  font-family: var(--hh-font-mono);
  font-size: .72rem;
  letter-spacing: .03em;
  background: var(--hh-blue-light);
  color: var(--hh-blue-dark);
  border: 1px solid rgba(10, 31, 68, .12);
  border-left: 2px solid var(--hh-orange);
}

.section-block--dark .tag,
.section-block--medium .tag {
  background: rgba(255, 255, 255, .08);
  color: #fff;
  border-color: transparent;
  border-left-color: var(--hh-orange);
}

.figure-panel {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--hh-blue-medium), var(--hh-blue-dark));
  border: 1px solid rgba(255, 255, 255, .12);
}

.figure-panel--16x9 {
  aspect-ratio: 16 / 9;
}

.figure-panel--4x3 {
  aspect-ratio: 4 / 3;
}

.figure-panel--portrait {
  aspect-ratio: 3 / 4;
}

.figure-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(255, 107, 53, .16) 0%, transparent 42%, rgba(255, 255, 255, .06) 100%);
  z-index: 1;
  pointer-events: none;
}

.figure-panel::after {
  content: "HY ●";
  position: absolute;
  right: .75rem;
  bottom: .6rem;
  font-family: var(--hh-font-mono);
  font-size: .7rem;
  letter-spacing: .2em;
  color: rgba(255, 255, 255, .48);
  z-index: 2;
}

.figure-panel > img,
.figure-panel__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.frame-panel {
  position: relative;
  padding: clamp(1.2rem, 3vw, 2.5rem);
  border: 1px solid rgba(10, 31, 68, .16);
  background: rgba(255, 255, 255, .4);
}

.frame-panel::before,
.frame-panel::after {
  content: "";
  position: absolute;
  width: 2.2rem;
  height: 2.2rem;
  border: 2px solid var(--hh-orange);
}

.frame-panel::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.frame-panel::after {
  bottom: -1px;
  right: -1px;
  border-left: 0;
  border-top: 0;
}

.section-block--dark .frame-panel,
.section-block--medium .frame-panel {
  border-color: rgba(255, 255, 255, .16);
  background: rgba(255, 255, 255, .04);
}

.metric {
  display: grid;
  gap: .35rem;
  padding: 1.1rem 0;
  border-top: 2px solid var(--hh-orange);
}

.metric__value {
  font-family: var(--hh-font-display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1;
  color: var(--hh-blue-dark);
}

.metric__label {
  font-family: var(--hh-font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--hh-gray);
}

.section-block--dark .metric {
  border-top-color: var(--hh-orange);
}

.section-block--dark .metric__value {
  color: #fff;
}

.section-block--dark .metric__label {
  color: rgba(255, 255, 255, .6);
}

.entry-row {
  display: grid;
  grid-template-columns: 6rem minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: baseline;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(10, 31, 68, .12);
}

.section-block--dark .entry-row,
.section-block--medium .entry-row {
  border-bottom-color: rgba(255, 255, 255, .12);
}

.entry-row__index {
  font-family: var(--hh-font-mono);
  font-size: .72rem;
  color: var(--hh-orange);
  letter-spacing: .08em;
}

.entry-row__title {
  font-weight: 700;
  color: inherit;
}

.entry-row__meta {
  font-size: .78rem;
  color: var(--hh-gray);
}

.callout {
  padding: 1.1rem 1.3rem;
  background: var(--hh-blue-light);
  border-left: 4px solid var(--hh-orange);
  color: var(--hh-near-black);
}

.section-block--dark .callout,
.section-block--medium .callout {
  background: rgba(255, 255, 255, .08);
  color: #fff;
}

.callout__title {
  font-family: var(--hh-font-display);
  font-size: 1rem;
  margin-bottom: .3rem;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem;
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 1.25rem 0 0;
  font-size: .8rem;
  font-family: var(--hh-font-mono);
}

.breadcrumb__item {
  display: flex;
  align-items: center;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--hh-gray);
  margin-right: .35rem;
}

.breadcrumb__link {
  color: var(--hh-blue-bright);
}

.breadcrumb__link:hover {
  color: var(--hh-orange);
}

.breadcrumb__item[aria-current="page"] {
  color: var(--hh-gray-dark);
  font-weight: 700;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid rgba(10, 31, 68, .14);
  background: transparent;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: .85rem;
}

.table th,
.table td {
  padding: .7rem .9rem;
  text-align: left;
  border-bottom: 1px solid rgba(10, 31, 68, .1);
}

.table th {
  font-family: var(--hh-font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  background: var(--hh-blue-light);
  color: var(--hh-blue-dark);
  text-transform: uppercase;
}

.table tr:last-child td {
  border-bottom: 0;
}

.section-block--dark .table-wrap,
.section-block--medium .table-wrap {
  border-color: rgba(255, 255, 255, .14);
}

.section-block--dark .table th,
.section-block--medium .table th {
  background: rgba(255, 255, 255, .08);
  color: var(--hh-orange);
}

.section-block--dark .table td,
.section-block--medium .table td {
  border-bottom-color: rgba(255, 255, 255, .1);
}

html.hh-js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .55s var(--hh-ease), transform .55s var(--hh-ease);
  will-change: opacity, transform;
}

html.hh-js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  html.hh-js [data-reveal] {
    opacity: 1;
    transform: none;
  }
}