*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--clr-dark);
  background: var(--clr-white);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

img, svg, video {
  display: block;
  max-width: 100%;
  height: auto;
}

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

button {
  font: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
  padding: 0;
}

input, textarea, select {
  font: inherit;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: 0.02em;
}

:root {
  --clr-primary: #F46036;
  --clr-dark: #2C2C2C;
  --clr-darker: #1A1A1A;
  --clr-white: #FFFFFF;
  --clr-accent: #FFD700;
  --clr-fog: #F2F2F2;
  --clr-line: #D9D9D9;
  --clr-danger: #E53935;
  --clr-success: #2E7D32;

  --font-display: 'Anton', 'Impact', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --font-data: 'Roboto Mono', 'Courier New', Consolas, monospace;

  --header-h: 72px;
  --rail-w: 240px;
  --content-max: 1180px;

  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-pill: 999px;

  --shadow-card: 0 12px 32px rgba(44, 44, 44, 0.08);
  --ease: 0.25s ease;
}

::selection {
  background: var(--clr-primary);
  color: var(--clr-white);
}

:focus-visible {
  outline: 3px solid var(--clr-primary);
  outline-offset: 2px;
  border-radius: 6px;
}

[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 500;
  padding: 10px 20px;
  background: var(--clr-primary);
  color: var(--clr-white);
  font-weight: 700;
  font-size: 14px;
  border-radius: var(--radius-pill);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  transform: translateY(-200%);
  transition: transform 0.3s ease;
}

.skip-link:focus {
  transform: translateY(0);
  outline: none;
}

.skip-link:focus-visible {
  outline: 3px solid var(--clr-accent);
  outline-offset: 2px;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 200;
  background: var(--clr-darker);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.brand-bar {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
}

.brand-bar::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--clr-primary) 0%, var(--clr-accent) 100%);
}

.brand-bar__actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand__mark {
  position: relative;
  width: 40px;
  height: 44px;
  flex-shrink: 0;
  background: linear-gradient(135deg, #FF8A50 0%, var(--clr-primary) 55%, #C2410C 100%);
  clip-path: polygon(50% 0%, 100% 40%, 80% 100%, 20% 100%, 0% 40%);
}

.brand__mark::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 47%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-accent);
  transform: translate(-50%, -50%);
}

.brand__text {
  display: inline-flex;
  flex-direction: column;
  line-height: 1;
}

.brand__cn {
  display: block;
  font-family: var(--font-display);
  font-size: 22px;
  font-style: italic;
  letter-spacing: 0.05em;
  color: var(--clr-white);
}

.brand__en {
  display: block;
  margin-top: 5px;
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--clr-primary);
}

.brand-bar__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-family: var(--font-data);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.8);
  white-space: nowrap;
}

.brand-bar__status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--clr-success);
  animation: status-pulse 2.2s infinite;
}

@keyframes status-pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(46, 125, 50, 0.45);
  }
  55% {
    box-shadow: 0 0 0 8px rgba(46, 125, 50, 0);
  }
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: background var(--ease);
}

.nav-toggle:hover {
  background: rgba(244, 96, 54, 0.2);
}

.nav-toggle__line {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--clr-white);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
  transform: translateY(8px) 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(-8px) rotate(-45deg);
}

.site-nav {
  position: fixed;
  top: var(--header-h);
  bottom: 0;
  left: 0;
  width: min(320px, 85vw);
  z-index: 220;
  display: flex;
  flex-direction: column;
  padding: 24px 16px 20px;
  background:
    linear-gradient(160deg, rgba(244, 96, 54, 0.1) 0%, transparent 42%),
    linear-gradient(180deg, var(--clr-dark) 0%, var(--clr-darker) 100%);
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 3px 0 18px rgba(0, 0, 0, 0.22);
  transform: translateX(-105%);
  transition: transform 0.32s ease;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: rgba(244, 96, 54, 0.6) transparent;
}

.site-nav::-webkit-scrollbar {
  width: 6px;
}

.site-nav::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}

.site-nav[data-open="true"] {
  transform: translateX(0);
}

.site-nav__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 8px;
  margin-bottom: 20px;
}

.site-nav__title {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.4);
}

.site-nav__close {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: var(--clr-white);
  font-size: 22px;
  line-height: 1;
  transition: background 0.25s ease, transform 0.25s ease;
}

.site-nav__close:hover {
  background: var(--clr-primary);
  transform: rotate(90deg);
}

.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.site-nav__item {
  margin: 0;
}

.site-nav__link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  border-radius: 14px;
  border-left: 3px solid transparent;
  color: rgba(255, 255, 255, 0.7);
  font-size: 15px;
  font-weight: 600;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.site-nav__link:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--clr-white);
}

.site-nav__link[aria-current="page"] {
  background: rgba(244, 96, 54, 0.16);
  border-left-color: var(--clr-primary);
  color: var(--clr-white);
}

.site-nav__index {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--clr-accent);
  min-width: 20px;
}

.site-nav__label {
  flex: 1;
}

.site-nav__foot {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px dashed rgba(255, 255, 255, 0.12);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.site-nav__cta {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 12px 18px;
  background: var(--clr-primary);
  color: var(--clr-white);
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 700;
  transition: background 0.25s ease, transform 0.25s ease;
}

.site-nav__cta:hover {
  background: #E1502C;
  transform: translateY(-2px);
}

.site-nav__cta-icon {
  font-size: 16px;
  transition: transform 0.25s ease;
}

.site-nav__cta:hover .site-nav__cta-icon {
  transform: translate(2px, -2px);
}

.site-nav__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
}

.site-nav__meta-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-primary);
  flex-shrink: 0;
}

.nav-backdrop {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 210;
  background: rgba(10, 10, 10, 0.55);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 300;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-primary) 0%, var(--clr-accent) 100%);
  pointer-events: none;
  transition: width 0.08s linear;
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 180;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: var(--radius-pill);
  background: var(--clr-dark);
  color: var(--clr-white);
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s, background 0.25s ease;
}

.back-to-top:hover {
  background: var(--clr-primary);
}

.back-to-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top__icon {
  line-height: 1;
}

.back-to-top__label {
  line-height: 1.2;
}

.site-main,
main#main-content {
  display: block;
  min-height: calc(100vh - var(--header-h));
  padding-top: var(--header-h);
  padding-bottom: 48px;
}

.container {
  width: 100%;
  max-width: var(--content-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  border: 2px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background: var(--clr-primary);
  color: var(--clr-white);
}

.btn--primary:hover {
  background: #D94F2A;
  box-shadow: 0 8px 20px rgba(244, 96, 54, 0.35);
  transform: translateY(-2px);
}

.btn--secondary {
  background: transparent;
  border-color: var(--clr-dark);
  color: var(--clr-dark);
}

.btn--secondary:hover {
  background: var(--clr-dark);
  color: var(--clr-white);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.08);
  color: var(--clr-white);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.16);
  color: var(--clr-white);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 28px;
  font-size: 13px;
  color: var(--clr-dark);
}

.breadcrumb a {
  color: var(--clr-dark);
  font-weight: 600;
  transition: color 0.2s ease;
}

.breadcrumb a:hover {
  color: var(--clr-primary);
}

.breadcrumb__sep {
  color: var(--clr-line);
  font-family: var(--font-data);
  font-size: 12px;
}

.breadcrumb [aria-current="page"] {
  color: var(--clr-primary);
  font-weight: 700;
}

.section-panel {
  background: var(--clr-white);
  border: 1px solid var(--clr-line);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
}

.section-panel--dark {
  background: var(--clr-dark);
  border-color: var(--clr-darker);
  color: rgba(255, 255, 255, 0.8);
}

.section-panel--dark .data-label {
  color: rgba(255, 255, 255, 0.45);
}

.section-panel--dark .data-value {
  color: var(--clr-white);
}

.section-panel--dark .data-value--primary {
  color: var(--clr-primary);
}

.section-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}

.section-head__index {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--clr-primary);
}

.section-head__title {
  font-family: var(--font-display);
  font-size: clamp(26px, 3vw, 40px);
  font-style: italic;
  line-height: 1.2;
  color: var(--clr-dark);
}

.section-head__line {
  flex: 1;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--clr-line) 0%, transparent 100%);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: var(--clr-fog);
  border: 1px solid var(--clr-line);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--clr-dark);
}

.section-tag--primary {
  background: rgba(244, 96, 54, 0.1);
  border-color: rgba(244, 96, 54, 0.3);
  color: #C2410C;
}

.section-tag--accent {
  background: rgba(255, 215, 0, 0.14);
  border-color: rgba(255, 215, 0, 0.4);
  color: #8A6D00;
}

.image-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--clr-fog);
  aspect-ratio: 16 / 10;
}

.image-frame--wide {
  aspect-ratio: 21 / 9;
}

.image-frame--square {
  aspect-ratio: 1 / 1;
}

.image-frame--portrait {
  aspect-ratio: 3 / 4;
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.image-frame:hover img {
  transform: scale(1.04);
}

.image-frame--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--clr-fog) 0%, var(--clr-line) 100%);
  color: rgba(44, 44, 44, 0.4);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.image-frame--placeholder::after {
  content: 'IMAGE PLACEHOLDER';
}

.grid {
  display: grid;
  gap: 24px;
}

.grid--2,
.grid--3,
.grid--4 {
  grid-template-columns: 1fr;
}

.data-label {
  display: block;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(44, 44, 44, 0.5);
}

.data-value {
  display: block;
  font-family: var(--font-data);
  font-size: 32px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--clr-dark);
}

.data-value--primary {
  color: var(--clr-primary);
}

.data-value--success {
  color: var(--clr-success);
}

.data-value--danger {
  color: var(--clr-danger);
}

.rich-text p {
  margin-bottom: 16px;
}

.rich-text h1,
.rich-text h2,
.rich-text h3,
.rich-text h4 {
  margin-top: 32px;
  margin-bottom: 12px;
  font-style: italic;
  color: var(--clr-dark);
}

.rich-text h1 {
  font-size: clamp(28px, 3vw, 40px);
}

.rich-text h2 {
  font-size: clamp(24px, 2.4vw, 32px);
}

.rich-text h3 {
  font-size: 20px;
}

.rich-text ul,
.rich-text ol {
  margin: 0 0 16px 1.4em;
}

.rich-text ul {
  list-style: disc;
}

.rich-text ol {
  list-style: decimal;
}

.rich-text li {
  margin-bottom: 6px;
}

.rich-text a {
  color: var(--clr-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

.js [data-reveal][data-revealed="true"] {
  opacity: 1;
  transform: translateY(0);
}

.site-footer {
  position: relative;
  background:
    radial-gradient(circle at 92% 8%, rgba(244, 96, 54, 0.08), transparent 38%),
    var(--clr-darker);
  color: rgba(255, 255, 255, 0.72);
  font-size: 15px;
  line-height: 1.7;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-primary) 0%, var(--clr-accent) 60%, transparent 100%);
  pointer-events: none;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 48px 24px 40px;
}

.site-footer__panel {
  min-width: 0;
}

.site-footer__panel--brand {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.site-footer__panel--contact {
  align-self: start;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 20px;
}

.site-footer__intro {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.58);
  max-width: 360px;
}

.site-footer__heading {
  font-family: var(--font-display);
  font-size: 14px;
  font-style: italic;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-white);
  margin-bottom: 16px;
  padding-bottom: 10px;
  position: relative;
}

.site-footer__heading::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 2px;
  border-radius: 2px;
  background: var(--clr-primary);
}

.site-footer__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.site-footer__list a {
  color: rgba(255, 255, 255, 0.68);
  transition: color 0.25s ease, padding-left 0.25s ease;
}

.site-footer__list a:hover {
  color: var(--clr-primary);
  padding-left: 6px;
}

.site-footer__contact {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.site-footer__contact li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.site-footer__contact-label {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.35);
}

.site-footer__contact-value {
  font-size: 14px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
  overflow-wrap: break-word;
}

.site-footer__bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px 16px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 18px 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-family: var(--font-data);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
}

.site-footer__copyright,
.site-footer__icp {
  margin: 0;
}

@media (min-width: 768px) {
  .container {
    padding-left: 40px;
    padding-right: 40px;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr 1fr;
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .site-footer__panel--brand {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .brand-bar {
    padding: 0 32px;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav {
    transform: translateX(0);
    width: var(--rail-w);
    padding: 28px 16px 24px;
    box-shadow: 1px 0 6px rgba(0, 0, 0, 0.12);
  }

  .site-nav__close {
    display: none;
  }

  .nav-backdrop {
    display: none !important;
  }

  .site-main,
  main#main-content {
    margin-left: var(--rail-w);
    width: calc(100% - var(--rail-w));
  }

  .site-footer {
    margin-left: var(--rail-w);
    width: calc(100% - var(--rail-w));
  }

  .site-footer__grid {
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    padding: 56px clamp(24px, 4vw, 64px) 44px;
  }

  .site-footer__panel--brand {
    grid-column: auto;
  }
}

@media (min-width: 1080px) {
  .grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }

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

@media (max-width: 1023.98px) {
  .site-nav__close {
    display: inline-flex;
  }
}

@media (max-width: 560px) {
  .brand-bar__status {
    display: none;
  }
}

@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;
  }

  .brand-bar__status-dot {
    animation: none;
  }

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