:root {
  --color-navy: #0A1F44;
  --color-navy-deep: #071731;
  --color-navy-offset: #132B5A;
  --color-navy-line: #1E3A6E;
  --color-orange: #FF6B35;
  --color-silver: #C0C0C0;
  --color-ash: #F5F7FA;
  --color-slate: #8A94A6;
  --color-white: #FFFFFF;
  --color-green: #2A9D8F;
  --color-yellow: #E9C46A;
  --font-display: "Oswald", "Arial Narrow", "Arial", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --radius-lg: 30px;
  --radius-md: 18px;
  --radius-pill: 999px;
  --site-width: 1240px;
  --shadow-orange: 0 10px 24px rgba(255, 107, 53, 0.28);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-ash);
  color: var(--color-navy);
  font-family: var(--font-body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
}

#main-content {
  display: block;
  min-height: 60vh;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
}

p,
ul {
  margin: 0;
}

ul {
  list-style: none;
  padding: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: inherit;
}

button {
  font: inherit;
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
  color: inherit;
}

svg {
  display: block;
}

:focus-visible {
  outline: 3px solid var(--color-orange);
  outline-offset: 3px;
  border-radius: 4px;
}

.page-shell {
  width: min(var(--site-width), 100% - 2rem);
  margin-inline: auto;
}

.section {
  padding-block: clamp(3rem, 8vw, 5.5rem);
}

.grid {
  display: grid;
  gap: 1.5rem;
}

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

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

@media (max-width: 900px) {
  .grid-3 {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.9rem 1.35rem;
  border-radius: var(--radius-pill);
  background: var(--color-orange);
  color: var(--color-white);
  font-weight: 700;
  line-height: 1;
  transition: transform 0.28s ease, box-shadow 0.28s ease, background-color 0.28s ease;
}

.button:hover {
  background: #ff814d;
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-orange);
}

.pill-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  transition: transform 0.28s ease, border-color 0.28s ease, background-color 0.28s ease;
}

.pill-link:hover {
  transform: translateY(-2px);
  border-color: var(--color-orange);
  background: rgba(255, 107, 53, 0.16);
  color: var(--color-white);
}

.pill-link-header {
  white-space: nowrap;
}

.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-navy-line);
  background: linear-gradient(135deg, var(--color-navy-offset), var(--color-navy));
  min-height: 0;
}

.media-frame::before {
  content: "";
  display: block;
  padding-bottom: 62.5%;
}

.media-frame[data-ratio="square"]::before {
  padding-bottom: 100%;
}

.media-frame[data-ratio="portrait"]::before {
  padding-bottom: 125%;
}

.media-frame > * {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.72);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.8rem 0;
  font-size: 0.86rem;
  color: var(--color-slate);
}

.breadcrumbs-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumbs-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumbs-item + .breadcrumbs-item::before {
  content: "/";
  color: var(--color-slate);
}

.breadcrumbs-link {
  color: var(--color-slate);
  transition: color 0.28s ease;
}

.breadcrumbs-link:hover {
  color: var(--color-orange);
}

.breadcrumbs-link[aria-current="page"] {
  color: var(--color-navy);
  font-weight: 700;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-navy-deep) 0%, var(--color-navy) 52%, var(--color-navy-offset) 100%);
  overflow: hidden;
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(115deg, rgba(192, 192, 192, 0.04) 0px, rgba(192, 192, 192, 0.04) 1px, transparent 1px, transparent 14px),
    radial-gradient(circle at 82% -30%, rgba(255, 107, 53, 0.18), transparent 42%);
  pointer-events: none;
}

.site-header::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-orange) 0%, rgba(255, 107, 53, 0.2) 48%, transparent 80%);
  pointer-events: none;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: 0.75rem;
  z-index: 30;
  transform: translateY(-200%);
  background: var(--color-orange);
  color: var(--color-white);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-pill);
  font-weight: 700;
  transition: transform 0.28s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.header-inner {
  position: relative;
  z-index: 1;
  max-width: var(--site-width);
  margin: 0 auto;
  padding: 1.4rem 2rem 0.9rem;
  display: grid;
  grid-template-columns: minmax(150px, 1fr) auto minmax(150px, 1fr);
  align-items: center;
  gap: 1rem;
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  min-width: 0;
  color: rgba(255, 255, 255, 0.5);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.header-meta-item {
  display: inline-block;
}

.header-meta-slash {
  color: var(--color-orange);
}

.masthead {
  display: flex;
  justify-content: center;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  position: relative;
  color: var(--color-white);
}

.brand-logo {
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  color: var(--color-orange);
  display: grid;
  place-items: center;
}

.brand-logo svg {
  width: 100%;
  height: 100%;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-white);
}

.brand-title-cn {
  color: var(--color-silver);
  margin-left: 0.25rem;
  font-weight: 500;
}

.brand-domain {
  margin-top: 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.62);
  letter-spacing: 0.05em;
}

.header-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 0.75rem;
}

.badge-soft {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.38rem 0.8rem;
  border: 1px solid rgba(255, 107, 53, 0.45);
  border-radius: var(--radius-pill);
  background: rgba(255, 107, 53, 0.12);
  color: #ffb37b;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.badge-soft::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.16);
}

.site-nav {
  position: relative;
  z-index: 2;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(7, 23, 49, 0.72);
  backdrop-filter: blur(8px);
  visibility: visible;
}

.nav-list {
  max-width: var(--site-width);
  margin: 0 auto;
  display: flex;
  justify-content: center;
}

.nav-item {
  position: relative;
  flex: 0 0 auto;
}

.nav-link {
  display: flex;
  align-items: center;
  white-space: nowrap;
  min-height: 3.4rem;
  padding: 0.85rem 1.3rem;
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.72);
  position: relative;
  transition: color 0.28s ease, background-color 0.28s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 1.3rem;
  right: 1.3rem;
  bottom: 0;
  height: 3px;
  border-radius: 3px 3px 0 0;
  background: var(--color-orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.28s ease;
}

.nav-link:hover {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.04);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--color-white);
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  box-shadow: 0 0 12px rgba(255, 107, 53, 0.7);
}

.nav-toggle {
  display: none;
  position: absolute;
  top: 1.1rem;
  right: 1.2rem;
  z-index: 8;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--color-white);
  font-size: 0.82rem;
  transition: background-color 0.28s ease, border-color 0.28s ease;
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 107, 53, 0.5);
}

.nav-toggle-box {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 20px;
}

.nav-toggle-line {
  display: block;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.28s ease, opacity 0.28s ease;
}

.nav-toggle-text {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.nav-toggle.is-active .nav-toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-active .nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-active .nav-toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.header-progress {
  position: absolute;
  z-index: 6;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: rgba(255, 255, 255, 0.04);
  pointer-events: none;
}

.header-progress-bar {
  display: block;
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--color-orange), #ff9975);
  box-shadow: 0 0 12px rgba(255, 107, 53, 0.4);
}

.site-footer {
  position: relative;
  background: linear-gradient(145deg, var(--color-navy-deep) 0%, var(--color-navy) 55%, var(--color-navy-offset) 100%);
  color: rgba(255, 255, 255, 0.82);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(115deg, rgba(192, 192, 192, 0.03) 0px, rgba(192, 192, 192, 0.03) 1px, transparent 1px, transparent 14px);
  pointer-events: none;
}

.site-footer::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-orange), rgba(255, 107, 53, 0.1) 70%, transparent);
}

.footer-shell {
  position: relative;
  max-width: var(--site-width);
  margin: 0 auto;
  padding: clamp(3rem, 6vw, 5rem) 2rem 2rem;
  display: grid;
  grid-template-columns: 1.6fr 0.8fr 1.2fr;
  gap: clamp(2rem, 5vw, 4rem);
}

.footer-brand {
  min-width: 0;
}

.footer-brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-white);
  margin-bottom: 1rem;
}

.footer-brand-mark {
  width: 38px;
  height: 38px;
  color: var(--color-orange);
  display: grid;
  place-items: center;
}

.footer-brand-mark svg {
  width: 100%;
  height: 100%;
}

.footer-brand-title {
  display: inline-flex;
  align-items: baseline;
  color: var(--color-white);
  font-family: var(--font-display);
  font-size: 1.7rem;
  line-height: 1;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.footer-brand-title-cn {
  color: var(--color-silver);
  margin-left: 0.25rem;
  font-weight: 500;
}

.footer-trust {
  max-width: 36rem;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.94rem;
  line-height: 1.85;
}

.footer-status {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-top: 1rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(42, 157, 143, 0.35);
  background: rgba(42, 157, 143, 0.14);
  color: #a5e8e0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-green);
  box-shadow: 0 0 0 3px rgba(42, 157, 143, 0.2);
}

.footer-links {
  min-width: 0;
}

.footer-heading {
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-silver);
}

.footer-list {
  display: grid;
  gap: 0.65rem;
}

.footer-link {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.93rem;
  transition: color 0.28s ease, padding-left 0.28s ease;
}

.footer-link:hover {
  color: var(--color-white);
  padding-left: 0.35rem;
}

.footer-contact-list {
  gap: 0.9rem;
}

.footer-contact-item {
  display: grid;
  gap: 0.15rem;
}

.footer-contact-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-slate);
  letter-spacing: 0.08em;
}

.footer-contact-value {
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.92rem;
  word-break: break-word;
}

.footer-legal {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.5rem;
  margin-top: 0.75rem;
  padding-top: 1.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.58);
}

.footer-copyright {
  font-family: var(--font-mono);
}

.footer-icp {
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.7);
}

.footer-legal-link {
  color: rgba(255, 255, 255, 0.58);
  transition: color 0.28s ease;
}

.footer-legal-link:hover {
  color: var(--color-orange);
}

@media (min-width: 901px) {
  .site-nav {
    display: block;
    max-height: none;
    visibility: visible;
  }
}

@media (max-width: 900px) {
  .header-inner {
    grid-template-columns: 1fr;
    padding: 1rem 1.25rem 0.85rem;
  }

  .header-meta,
  .header-actions {
    display: none;
  }

  .masthead {
    grid-column: 1 / -1;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: block;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    border-top: 0;
    transition: max-height 0.28s ease, visibility 0.28s ease;
  }

  .site-nav[data-open] {
    max-height: min(26rem, calc(100vh - 6rem));
    overflow-y: auto;
    visibility: visible;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    transition: max-height 0.28s ease, visibility 0s;
  }

  .nav-list {
    flex-direction: column;
    max-width: none;
    padding: 0.25rem 0 0.75rem;
  }

  .nav-item {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
  }

  .nav-link {
    min-height: 3rem;
    padding: 0.8rem 1.5rem;
    justify-content: space-between;
  }

  .nav-link::after {
    display: none;
  }

  .nav-link[aria-current="page"] {
    background: rgba(255, 107, 53, 0.12);
    box-shadow: inset 3px 0 var(--color-orange);
  }

  .footer-shell {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem 1.5rem;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 600px) {
  .brand-title {
    font-size: 1.65rem;
  }

  .nav-toggle {
    top: 0.95rem;
    right: 0.9rem;
  }

  .footer-shell {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-legal {
    flex-direction: column;
    align-items: flex-start;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}