html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: #F5F5F5;
  color: #111111;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.75;
}
main {
  display: block;
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: #0A1B2A;
  text-decoration: none;
}
a:hover {
  color: #FF4D00;
}
button {
  font: inherit;
  color: inherit;
}
ul,
ol {
  margin: 0;
  padding: 0;
}
:focus-visible {
  outline: 3px solid #FF4D00;
  outline-offset: 2px;
}
::selection {
  background: #FF4D00;
  color: #ffffff;
}

:root {
  --c-primary: #FF4D00;
  --c-night: #0A1B2A;
  --c-ink: #111111;
  --c-paper: #F5F5F5;
  --c-gray: #888888;
  --c-line: #E0E0E0;
  --c-yellow: #FFB300;
  --c-blue: #1E90FF;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-title: "DIN Condensed", "Roboto Condensed", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --header-h: 72px;
}

.container {
  width: min(1200px, 92%);
  margin-inline: auto;
}

.site-main {
  min-height: 70vh;
}

.nav-locked {
  overflow: hidden;
}

.skip-link {
  position: fixed;
  top: -100%;
  left: 0;
  z-index: 2000;
  background: #0A1B2A;
  color: #ffffff;
  padding: 0.8rem 1.4rem;
  font-weight: 700;
  border-radius: 0 0 4px 0;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.3);
  transition: top 0.2s ease;
}
.skip-link:focus,
.skip-link:focus-visible {
  top: 0;
  color: #ffffff;
  outline: 3px solid #FFB300;
  outline-offset: 0;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: linear-gradient(180deg, rgba(10, 27, 42, 0.82) 0%, rgba(10, 27, 42, 0.28) 55%, transparent 100%);
  border-bottom: 1px solid transparent;
  transition: background-color 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.site-header.is-scrolled,
.site-header.is-open {
  background: rgba(10, 27, 42, 0.98);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 10px 34px rgba(0, 0, 0, 0.22);
}
.site-header__inner {
  display: flex;
  align-items: center;
  min-height: var(--header-h);
  gap: 1rem;
  position: relative;
}

.site-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, #FF4D00, #FFB300);
  box-shadow: 0 0 12px rgba(255, 77, 0, 0.6);
  pointer-events: none;
  z-index: 1100;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-right: auto;
  font-family: var(--font-title);
  font-weight: 800;
  letter-spacing: 0.06em;
  color: #ffffff;
  line-height: 1;
}
.site-logo:hover {
  color: #ffffff;
}
.site-logo__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 4px 14px 4px 4px;
  background: #FF4D00;
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 900;
  transform: skewX(-8deg);
  box-shadow: 4px 4px 0 rgba(255, 77, 0, 0.25);
  transition: transform 0.22s ease, background-color 0.22s ease;
}
.site-logo:hover .site-logo__mark {
  background: #E64600;
  transform: skewX(-8deg) translateY(-2px);
}
.site-logo__text {
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: #ffffff;
}
.site-logo__dot {
  color: #FF4D00;
  font-style: normal;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
}
.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 0.55rem 0.9rem;
  color: rgba(255, 255, 255, 0.84);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  border-radius: 2px;
  transition: color 0.2s ease;
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0.9rem;
  right: 0.9rem;
  bottom: 0.28rem;
  height: 2px;
  background: #FF4D00;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.24s ease;
}
.site-nav__link:hover,
.site-nav__link[aria-current="page"] {
  color: #ffffff;
}
.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}
.site-nav__link[aria-current="page"] {
  color: #FFB300;
}

.site-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.favorite-trigger,
.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.45);
  color: #ffffff;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  transition: border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}
.favorite-trigger:hover,
.favorite-trigger.is-tip {
  border-color: #FFB300;
  color: #FFB300;
  box-shadow: 0 0 0 4px rgba(255, 179, 0, 0.16);
  background: rgba(255, 179, 0, 0.06);
}
.favorite-trigger__text {
  font-weight: 700;
}

.site-footer {
  position: relative;
  overflow: hidden;
  background: #0A1B2A;
  color: rgba(255, 255, 255, 0.78);
  border-top: 6px solid #FF4D00;
}
.site-footer__flare {
  position: absolute;
  top: 0;
  right: 0;
  width: 280px;
  height: 280px;
  background: repeating-linear-gradient(-45deg, rgba(255, 77, 0, 0.14) 0, rgba(255, 77, 0, 0.14) 2px, transparent 2px, transparent 12px);
  pointer-events: none;
}
.site-footer__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 2.5rem;
  padding: 3.5rem 0 2.5rem;
}
.site-footer__brand .site-logo__text {
  color: #ffffff;
}
.site-footer__brand .site-logo__mark {
  background: #FF4D00;
}
.site-footer__slogan {
  margin: 1.1rem 0 0.6rem;
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  border-left: 4px solid #FF4D00;
  padding-left: 0.75rem;
  font-family: var(--font-title);
}
.site-footer__note {
  max-width: 34ch;
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.56);
}
.site-footer__block {
  min-width: 0;
}
.site-footer__heading {
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  color: #ffffff;
  font-family: var(--font-title);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.site-footer a {
  color: rgba(255, 255, 255, 0.76);
  text-decoration: none;
  transition: color 0.18s ease;
}
.site-footer a:hover {
  color: #FFB300;
}
.site-footer__list {
  list-style: none;
  display: grid;
  gap: 0.5rem;
}
.site-footer__contact {
  list-style: none;
  display: grid;
  gap: 0.55rem;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.78);
  word-break: break-all;
}
.site-footer__support {
  margin: 1rem 0 0;
  padding-top: 0.8rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.82rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.5);
}
.site-footer__bottom {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.24);
}
.site-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 2rem;
  padding: 1rem 0;
  font-size: 0.84rem;
  color: rgba(255, 255, 255, 0.6);
}
.site-footer__bottom-inner p {
  margin: 0;
}
.site-footer__icp {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}
.site-footer__copyright {
  letter-spacing: 0.02em;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 50%;
  border-color: rgba(255, 255, 255, 0.3);
}
.nav-toggle__line {
  display: block;
  width: 20px;
  height: 2px;
  margin: 3.5px 0;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.22s ease, opacity 0.18s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

.page-hero {
  display: flex;
  align-items: flex-end;
  min-height: 100vh;
  padding: calc(var(--header-h) + 3rem) 0 3rem;
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: #0A1B2A;
  color: #ffffff;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(100deg, rgba(255, 77, 0, 0.22) 0%, transparent 48%);
}
.page-hero::after {
  content: "";
  position: absolute;
  top: -10%;
  right: -8%;
  width: 42%;
  height: 130%;
  z-index: -1;
  background: repeating-linear-gradient(-45deg, rgba(255, 255, 255, 0.05) 0 2px, transparent 2px 12px);
  transform: skewX(-8deg);
}
.page-hero--compact {
  min-height: 58vh;
  align-items: center;
}
.page-hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: #FF4D00;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.page-hero__title {
  margin: 0;
  color: #ffffff;
  font-family: var(--font-title);
  font-size: clamp(3rem, 9vw, 7rem);
  font-weight: 900;
  line-height: 0.92;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.page-hero__lead {
  margin: 1.25rem 0 0;
  max-width: 48ch;
  font-size: 1.08rem;
  color: rgba(255, 255, 255, 0.72);
}
.page-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

.section {
  padding: 4.5rem 0;
}
.section--dark {
  background: #0A1B2A;
  color: rgba(255, 255, 255, 0.8);
}
.section--tint {
  background: linear-gradient(180deg, #ffffff 0%, #F5F5F5 100%);
}
.section--stripe {
  position: relative;
}
.section--stripe::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 3px;
  background: repeating-linear-gradient(90deg, #FF4D00 0 44px, transparent 44px 88px, #FFB300 88px 132px, transparent 132px 176px);
}
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}
.section-index {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: #FF4D00;
  text-transform: uppercase;
}
.section-title {
  margin: 0;
  color: #111111;
  font-family: var(--font-title);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: 0.02em;
}
.section--dark .section-title {
  color: #ffffff;
}
.section-lead {
  max-width: 50ch;
  margin: 0;
  color: #888888;
}
.section--dark .section-lead {
  color: rgba(255, 255, 255, 0.62);
}

.grid {
  display: grid;
  gap: 2rem;
}
.grid--2 {
  grid-template-columns: repeat(2, 1fr);
}
.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}
.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  background: #ffffff;
  border: 1px solid #E0E0E0;
  border-radius: 4px;
  padding: 1.5rem;
  box-shadow: 0 8px 24px rgba(17, 17, 17, 0.04);
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}
.card--hover:hover {
  transform: translateY(-4px);
  border-color: #FF4D00;
  box-shadow: 0 16px 36px rgba(17, 17, 17, 0.09);
}
.card__title {
  margin: 0 0 0.6rem;
  color: #111111;
  font-family: var(--font-title);
  font-size: 1.35rem;
  font-weight: 800;
}
.card__meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #888888;
  letter-spacing: 0.06em;
}
.card__text {
  margin: 0.8rem 0 0;
  color: #444444;
  font-size: 0.95rem;
}

.stat-card {
  background: #0A1B2A;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
}
.stat-card::after {
  content: "";
  position: absolute;
  right: -20px;
  bottom: -20px;
  width: 70px;
  height: 70px;
  background: repeating-linear-gradient(-45deg, rgba(255, 77, 0, 0.18) 0 2px, transparent 2px 8px);
}
.stat-card__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1;
  color: #FFB300;
}
.stat-card__label {
  display: block;
  margin-top: 0.6rem;
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.62);
}

.steps {
  list-style: none;
  counter-reset: step;
}
.steps__item {
  position: relative;
  counter-increment: step;
  padding-left: 3.5rem;
  margin-bottom: 1.5rem;
}
.steps__item::before {
  content: "0" counter(step);
  position: absolute;
  left: 0;
  top: -0.1rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.2rem;
  color: #FF4D00;
}
.steps__item::after {
  content: "";
  position: absolute;
  left: 0.65rem;
  top: 2.3rem;
  bottom: -1.3rem;
  width: 1px;
  background: #E0E0E0;
}
.steps__item:last-child {
  margin-bottom: 0;
}
.steps__item:last-child::after {
  display: none;
}
.steps__title {
  margin: 0 0 0.25rem;
  font-family: var(--font-title);
  font-size: 1.2rem;
  font-weight: 800;
  color: #111111;
}
.steps__text {
  margin: 0;
  font-size: 0.92rem;
  color: #666666;
}
.section--dark .steps__title {
  color: #ffffff;
}
.section--dark .steps__text {
  color: rgba(255, 255, 255, 0.6);
}
.section--dark .steps__item::after {
  background: rgba(255, 255, 255, 0.14);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.6rem;
  border-radius: 2px;
  border: 2px solid transparent;
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.btn--primary {
  background: #FF4D00;
  color: #ffffff;
  box-shadow: 4px 4px 0 rgba(17, 17, 17, 0.16);
}
.btn--primary:hover {
  background: #E64600;
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 6px 6px 0 rgba(17, 17, 17, 0.22);
}
.btn--outline {
  border-color: #0A1B2A;
  color: #0A1B2A;
}
.btn--outline:hover {
  background: #0A1B2A;
  color: #ffffff;
}
.btn--ghost {
  border-color: rgba(255, 255, 255, 0.5);
  color: #ffffff;
}
.btn--ghost:hover {
  border-color: #FFB300;
  color: #FFB300;
}
.btn--small {
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
}

.tag {
  display: inline-block;
  padding: 0.24rem 0.65rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 77, 0, 0.28);
  background: rgba(255, 77, 0, 0.08);
  color: #FF4D00;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.3rem;
  padding: 1.25rem 0;
  list-style: none;
  font-size: 0.86rem;
  color: #888888;
}
.breadcrumbs a {
  color: #1E90FF;
}
.breadcrumbs a:hover {
  color: #FF4D00;
}
.breadcrumbs li + li::before {
  content: "/";
  margin-right: 0.3rem;
  color: #E0E0E0;
}

.image-frame {
  position: relative;
  overflow: hidden;
  background: linear-gradient(140deg, #0A1B2A 0%, #111111 100%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  min-height: 180px;
}
.image-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 77, 0, 0.16) 0%, transparent 62%);
  pointer-events: none;
}
.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: contrast(1.06);
}
.image-frame--wide {
  aspect-ratio: 16 / 9;
}
.image-frame--tall {
  aspect-ratio: 4 / 5;
}
.image-frame--skew {
  transform: rotate(-1.2deg);
  box-shadow: 0 18px 40px rgba(17, 17, 17, 0.22);
}

.table-wrap {
  overflow-x: auto;
  background: #ffffff;
  border: 1px solid #E0E0E0;
  border-radius: 4px;
}
.data-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-size: 0.92rem;
}
.data-table th,
.data-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid #E0E0E0;
  text-align: left;
}
.data-table th {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #0A1B2A;
  background: #F5F5F5;
  white-space: nowrap;
}
.data-table tbody tr:hover {
  background: rgba(255, 77, 0, 0.05);
}
.data-table tbody tr:last-child td {
  border-bottom: none;
}

@media (max-width: 1024px) {
  .site-footer__inner {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 880px) {
  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 1002;
    display: block;
    max-height: 0;
    overflow: hidden;
    background: #0A1B2A;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    transition: max-height 0.28s ease, padding 0.28s ease;
  }
  .site-nav[data-open="true"] {
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 0.6rem 5% 1.25rem;
  }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .site-nav__link {
    display: block;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
  }
  .site-nav__link::after {
    display: none;
  }
  .site-nav__link:hover,
  .site-nav__link[aria-current="page"] {
    color: #FFB300;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .site-header__inner {
    gap: 0.5rem;
  }
}

@media (max-width: 680px) {
  .site-footer__inner {
    grid-template-columns: 1fr;
    padding-top: 2.6rem;
  }
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
  .section {
    padding: 3.2rem 0;
  }
  .site-footer__bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }
  .favorite-trigger__text {
    display: none;
  }
  .favorite-trigger {
    width: 42px;
    height: 42px;
    padding: 0;
    border-radius: 50%;
  }
  .site-logo__text {
    font-size: 1.2rem;
  }
  .site-logo__mark {
    width: 34px;
    height: 34px;
    font-size: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}