:root {
  --color-primary: #0B3D2E;
  --color-primary-light: #12694E;
  --color-primary-dark: #004D2E;
  --color-accent: #FF6B00;
  --color-accent-hover: #E05E00;
  --color-dark: #1A1A1A;
  --color-white: #FFFFFF;
  --color-gray-light: #E5E5E5;
  --color-gray: #8B8B8B;
  --color-cream: #F5F0E8;
  --color-success: #2E7D5B;
  --color-warning: #FFC043;
  --font-heading: "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  --font-data: "Source Code Pro", "Roboto Mono", "Consolas", monospace;
  --container-width: 1280px;
  --header-height: 72px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 3rem;
  --space-xl: 5rem;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.3);
  --radius-sm: 4px;
  --radius-md: 8px;
  --transition-fast: 200ms ease;
  --transition-base: 300ms ease;
}

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

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

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--color-dark);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--color-white);
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), padding-left var(--transition-fast);
}

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

ul, ol {
  list-style: none;
}

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

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.page {
  flex: 1 1 auto;
  padding-top: var(--header-height);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.6rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-white);
  background: var(--color-accent);
  border: 0;
  border-radius: var(--radius-sm);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 100%, 16px 100%);
  transition: background var(--transition-fast), color var(--transition-fast), filter var(--transition-fast), transform var(--transition-fast);
}

.btn:hover {
  background: var(--color-accent-hover);
  color: var(--color-white);
  filter: drop-shadow(0 6px 16px rgba(255, 107, 0, 0.35));
  transform: translateY(-2px);
}

.btn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

.btn--ghost {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255, 255, 255, 0.8);
  clip-path: none;
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--color-white);
  color: var(--color-white);
  filter: none;
}

.skip-link {
  position: fixed;
  top: -80px;
  left: 1rem;
  z-index: 1000;
  padding: 0.75rem 1.5rem;
  background: var(--color-accent);
  color: var(--color-white);
  font-weight: 700;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  transition: top var(--transition-fast);
}

.skip-link:focus-visible {
  top: 0;
  color: var(--color-white);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: linear-gradient(to bottom, rgba(26, 26, 26, 0.45), rgba(26, 26, 26, 0));
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.site-header.is-scrolled {
  background: rgba(11, 61, 46, 0.92);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.site-header.is-nav-open {
  background: rgba(11, 61, 46, 0.98);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  min-height: var(--header-height);
  flex-wrap: wrap;
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--color-accent);
  z-index: 10;
  transition: width 0.05s linear;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--color-accent);
  color: var(--color-dark);
  font-family: var(--font-data);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 100%, 8px 100%);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand__text strong {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-white);
}

.brand__text small {
  font-family: var(--font-data);
  font-size: 0.68rem;
  color: var(--color-accent);
  letter-spacing: 0.1em;
}

.brand--footer .brand__mark {
  background: var(--color-accent);
}

.brand--footer .brand__text strong {
  color: var(--color-white);
}

.brand--footer .brand__text small {
  color: var(--color-accent);
}

.site-nav {
  margin-left: auto;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav__link {
  display: block;
  padding: 0.55rem 1rem;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.95rem;
  font-weight: 600;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.site-nav__link:hover {
  color: var(--color-white);
  border-color: var(--color-accent);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-white);
  border-color: var(--color-accent);
}

.site-header__cta {
  margin-left: 0;
  padding: 0.55rem 1.25rem;
  font-size: 0.85rem;
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 12px 10px;
  margin-left: auto;
  flex-shrink: 0;
}

.nav-toggle__line {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
  transform: translateY(7px) 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(-7px) rotate(-45deg);
}

.page-hero {
  padding: calc(var(--header-height) + var(--space-xl)) 0 var(--space-xl);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: -10%;
  width: 60%;
  height: 100%;
  background: linear-gradient(135deg, rgba(11, 61, 46, 0.7), rgba(0, 77, 46, 0.25));
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
  z-index: 0;
}

.page-hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.1;
  position: relative;
  z-index: 1;
  color: var(--color-white);
}

.page-hero__lead {
  max-width: 640px;
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.75);
  position: relative;
  z-index: 1;
  margin-top: 1rem;
}

.breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: 1.25rem;
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
}

.breadcrumb__list li + li::before {
  content: "/";
  margin-right: 0.75rem;
  color: var(--color-accent);
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.6);
}

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

.breadcrumb a[aria-current="page"] {
  color: var(--color-white);
  font-weight: 600;
}

.section {
  padding: var(--space-xl) 0;
}

.section__eyebrow {
  font-family: var(--font-data);
  font-size: 0.82rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
  display: inline-block;
}

.section__title {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  line-height: 1.15;
  margin-bottom: 1rem;
  color: var(--color-white);
}

.section__lead {
  max-width: 680px;
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-md);
}

.grid {
  display: grid;
  gap: var(--space-md);
}

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

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

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

.card {
  background: var(--color-cream);
  color: var(--color-dark);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  border-left: 4px solid var(--color-accent);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card__title {
  font-size: 1.25rem;
  color: var(--color-dark);
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.card__text {
  font-size: 0.95rem;
  color: rgba(26, 26, 26, 0.8);
}

.tag {
  display: inline-block;
  padding: 0.2em 0.75em;
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.6;
  border-radius: 999px;
  background: rgba(255, 192, 67, 0.18);
  color: var(--color-warning);
  border: 1px solid rgba(255, 192, 67, 0.3);
}

.tag--accent {
  background: rgba(255, 107, 0, 0.15);
  color: var(--color-accent);
  border-color: rgba(255, 107, 0, 0.35);
}

.tag--success {
  background: rgba(46, 125, 91, 0.15);
  color: var(--color-success);
  border-color: rgba(46, 125, 91, 0.35);
}

.data-pill {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  font-family: var(--font-data);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-accent);
  background: rgba(0, 0, 0, 0.35);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 107, 0, 0.2);
  letter-spacing: 0.03em;
}

.visual-panel {
  position: relative;
  background: linear-gradient(135deg, #0B3D2E 0%, #1A1A1A 60%, rgba(255, 107, 0, 0.12) 100%);
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.visual-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 80% 20%, rgba(255, 107, 0, 0.18) 0%, transparent 50%);
  z-index: 0;
}

.visual-panel img,
.visual-panel picture {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.divider {
  height: 2px;
  border: none;
  background: linear-gradient(to right, var(--color-accent), transparent);
  opacity: 0.6;
}

.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.78);
  margin-top: auto;
}

.site-footer__main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  padding: 4rem 0;
}

.site-footer__col--brand {
  max-width: 360px;
}

.site-footer__desc {
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 1.25rem;
}

.site-footer__heading {
  font-size: 1rem;
  color: var(--color-white);
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
}

.site-footer__list li {
  margin-bottom: 0.6rem;
}

.site-footer__list a {
  color: rgba(255, 255, 255, 0.72);
}

.site-footer__list a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.site-footer__note {
  margin-top: 1.25rem;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.5);
  border-left: 2px solid var(--color-accent);
  padding-left: 0.75rem;
  line-height: 1.6;
}

.site-footer__contact-list li {
  display: flex;
  flex-direction: column;
  padding: 0.55rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer__label {
  font-family: var(--font-data);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 0.15rem;
}

.site-footer__value {
  display: block;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.92rem;
  word-break: break-word;
}

.site-footer__bottom {
  background: var(--color-primary);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer__bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 56px;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.5);
  gap: 0.5rem;
  flex-wrap: wrap;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

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

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

@media (max-width: 991px) {
  :root {
    --header-height: 64px;
  }

  .container {
    padding-inline: var(--space-sm);
  }

  .site-header__inner {
    gap: 0;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
  }

  .brand {
    margin-right: auto;
  }

  .brand__text strong {
    font-size: 1.1rem;
  }

  .site-header__cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
    flex-basis: 100%;
    order: 10;
    padding-top: 0.75rem;
  }

  .site-nav[data-open] {
    display: block;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__link {
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 1rem;
  }

  .site-nav__item--cta {
    padding-top: 0.75rem;
  }

  .site-nav__btn {
    width: 100%;
    margin-top: 0.25rem;
  }

  .site-footer__main {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    padding: 3rem 0;
  }

  .site-footer__col--brand {
    grid-column: 1 / -1;
    max-width: none;
  }

  .grid--cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--cols-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .container {
    padding-inline: 1rem;
  }

  .brand__mark {
    width: 38px;
    height: 38px;
    font-size: 14px;
  }

  .brand__text strong {
    font-size: 1.05rem;
  }

  .brand__text small {
    font-size: 0.62rem;
  }

  .section {
    padding: var(--space-lg) 0;
  }

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

  .site-footer__main {
    grid-template-columns: 1fr;
    gap: 2.25rem;
    padding: 3rem 0;
  }

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

  .site-footer__bottom-inner {
    flex-direction: column;
    text-align: center;
    gap: 0.25rem;
  }

  .page-hero {
    padding-top: calc(var(--header-height) + var(--space-lg));
  }

  .btn {
    padding: 0.7rem 1.3rem;
    font-size: 0.9rem;
  }
}

@media (min-width: 992px) {
  .site-nav__item--cta {
    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;
    transition-delay: 0ms !important;
  }

  .btn:hover {
    transform: none;
  }

  .card:hover {
    transform: none;
  }
}