:root {
  --color-gold: #D4AF37;
  --color-gold-light: #F6E27A;
  --color-deep-blue: #0A1F44;
  --color-gem-blue: #1E3A8A;
  --color-white: #FFFFFF;
  --color-cloud: #F5F5F5;
  --color-fog: #9CA3AF;
  --color-red: #DC2626;
  --gradient-gold: linear-gradient(135deg, #F6E27A 0%, #D4AF37 100%);
  --font-title: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-body: "Noto Sans SC", "Source Han Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Roboto Mono", "SF Mono", "Menlo", "Courier New", monospace;
  --size-h1: clamp(2.5rem, 5vw, 3.5rem);
  --size-h2: clamp(2rem, 4vw, 2.8rem);
  --size-h3: clamp(1.4rem, 2.5vw, 2rem);
  --size-body: 1.125rem;
  --container-width: 1280px;
  --header-height: 80px;
  --header-height-mobile: 64px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-pill: 999px;
  --transition: 0.3s ease;
  --shadow-header: 0 4px 24px rgba(0, 0, 0, 0.2);
  --shadow-card: 0 12px 32px rgba(10, 31, 68, 0.08);
}

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

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

body {
  font-family: var(--font-body);
  font-size: var(--size-body);
  line-height: 1.8;
  color: var(--color-deep-blue);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

ul, ol {
  list-style: none;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-title);
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-deep-blue);
  margin-bottom: 0.5em;
}

h1 { font-size: var(--size-h1); }
h2 { font-size: var(--size-h2); }
h3 { font-size: var(--size-h3); }

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

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

#main-content {
  scroll-margin-top: calc(var(--header-height) + 16px);
}

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

.section {
  padding-top: 80px;
  padding-bottom: 80px;
}

.section--tight {
  padding-top: 40px;
  padding-bottom: 40px;
}

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

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

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

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), color var(--transition), border-color var(--transition);
}

.btn--gold {
  background: var(--gradient-gold);
  color: var(--color-deep-blue);
  box-shadow: 0 4px 16px rgba(212, 175, 55, 0.25);
}

.btn--gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212, 175, 55, 0.4);
}

.btn--outline {
  background: transparent;
  color: var(--color-gold);
  border: 1px solid rgba(212, 175, 55, 0.5);
}

.btn--outline:hover {
  border-color: var(--color-gold);
  background: rgba(212, 175, 55, 0.08);
  transform: translateY(-2px);
}

.btn--block {
  display: flex;
  width: 100%;
}

.card {
  background: var(--color-white);
  border: 1px solid rgba(10, 31, 68, 0.08);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: rgba(212, 175, 55, 0.4);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  background: rgba(212, 175, 55, 0.12);
  color: var(--color-gem-blue);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.6;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.section-label::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--gradient-gold);
  border-radius: 2px;
  flex-shrink: 0;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 32px;
  font-size: 0.85rem;
  color: var(--color-fog);
}

.breadcrumb a {
  color: var(--color-deep-blue);
  transition: color var(--transition);
}

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

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb__item:not(:last-child)::after {
  content: "›";
  color: var(--color-fog);
}

.breadcrumb__item[aria-current="page"] {
  color: var(--color-deep-blue);
  font-weight: 600;
}

.media {
  position: relative;
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-deep-blue), var(--color-gem-blue));
  aspect-ratio: 16 / 9;
}

.media img,
.media svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.skip-link {
  position: fixed;
  top: 16px;
  left: 16px;
  transform: translateY(-200%);
  z-index: 9999;
  padding: 10px 24px;
  background: var(--color-gold);
  color: var(--color-deep-blue);
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  text-decoration: none;
  transition: transform 0.3s ease;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(10, 31, 68, 0.3);
  transition: background-color 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease;
  border-bottom: 1px solid transparent;
}

.site-header[data-scrolled] {
  background-color: rgba(10, 31, 68, 0.97);
  border-bottom-color: rgba(212, 175, 55, 0.5);
  box-shadow: var(--shadow-header);
}

.site-header__inner {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.site-header__progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  transform-origin: 0 50%;
  transform: scaleX(0);
  background: linear-gradient(90deg, var(--color-gold-light), var(--color-gold) 70%, var(--color-red));
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 3;
}

.site-header[data-scrolled] .site-header__progress {
  opacity: 1;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.site-header__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.site-header__brand-name {
  font-family: var(--font-title);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.site-header__brand-sub {
  font-size: 0.65rem;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.28em;
  white-space: nowrap;
}

.crown-mark {
  position: relative;
  display: inline-block;
  width: 34px;
  height: 26px;
  flex-shrink: 0;
}

.crown-mark::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 78%;
  background: var(--gradient-gold);
  border-radius: 40% 40% 4px 4px / 70% 70% 4px 4px;
  -webkit-clip-path: polygon(0% 100%, 0% 50%, 12% 65%, 25% 5%, 40% 60%, 50% 0%, 60% 60%, 75% 5%, 88% 65%, 100% 50%, 100% 100%);
  clip-path: polygon(0% 100%, 0% 50%, 12% 65%, 25% 5%, 40% 60%, 50% 0%, 60% 60%, 75% 5%, 88% 65%, 100% 50%, 100% 100%);
}

.crown-mark::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 14px;
  height: 5px;
  border-radius: 50%;
  background: linear-gradient(90deg, rgba(212, 175, 55, 0.5), rgba(246, 226, 122, 0.9), rgba(212, 175, 55, 0.5));
}

.crown-mark--lg {
  width: 44px;
  height: 32px;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__link {
  display: inline-block;
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  color: rgba(255, 255, 255, 0.86);
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  white-space: nowrap;
  transition: color var(--transition), background-color var(--transition), box-shadow var(--transition);
}

.site-nav__link:hover {
  color: var(--color-gold-light);
  background: rgba(212, 175, 55, 0.12);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-gold-light);
  background: rgba(212, 175, 55, 0.16);
  box-shadow: inset 0 0 0 1px rgba(212, 175, 55, 0.3);
  font-weight: 600;
}

.site-header__cta {
  margin-left: 6px;
  padding: 10px 24px;
  font-size: 0.88rem;
  flex-shrink: 0;
}

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 14px;
  flex-shrink: 0;
  background: rgba(10, 31, 68, 0.3);
  transition: border-color var(--transition), background-color var(--transition);
}

.site-header__toggle:hover {
  border-color: rgba(212, 175, 55, 0.6);
}

.site-header__toggle-line {
  width: 20px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition), background-color var(--transition);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  background: var(--color-gold-light);
}

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

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  background: var(--color-gold-light);
}

.site-footer {
  background: linear-gradient(180deg, var(--color-deep-blue) 0%, #081630 100%);
  color: rgba(255, 255, 255, 0.8);
}

.site-footer::before {
  content: "";
  display: block;
  height: 3px;
  background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.8) 20%, var(--color-gold-light) 50%, rgba(212, 175, 55, 0.8) 80%, transparent);
}

.site-footer__container {
  padding-top: 64px;
  padding-bottom: 56px;
}

.site-footer__cols {
  display: grid;
  grid-template-columns: 1.3fr 0.8fr 0.8fr 1.1fr;
  gap: 48px;
}

.site-footer__brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.site-footer__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.site-footer__brand-name {
  font-family: var(--font-title);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.04em;
}

.site-footer__brand-sub {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.28em;
}

.site-footer__tagline {
  font-size: 0.9rem;
  color: var(--color-gold);
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.site-footer__trust {
  font-size: 0.82rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
  max-width: 340px;
}

.site-footer__heading {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-gold-light);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

.site-footer__links li {
  margin-bottom: 10px;
}

.site-footer__links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  transition: color var(--transition), padding-left var(--transition);
}

.site-footer__links a:hover {
  color: var(--color-gold-light);
  padding-left: 4px;
}

.site-footer__contact li {
  margin-bottom: 14px;
}

.site-footer__contact-item {
  display: flex;
  gap: 12px;
}

.site-footer__contact-label {
  display: inline-block;
  min-width: 42px;
  font-size: 0.8rem;
  color: var(--color-gold);
  font-weight: 600;
  flex-shrink: 0;
  padding-top: 1px;
}

.site-footer__contact-value {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.5;
  word-break: break-all;
}

.site-footer__contact-note {
  margin-top: 12px;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.4);
  line-height: 1.6;
}

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 20px;
  padding-bottom: 24px;
}

.site-footer__bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 24px;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.45);
}

.site-footer__copyright {
  margin: 0;
}

.site-footer__icp {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  transition-delay: calc(var(--reveal-delay, 0) * 100ms);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 3px;
  border-radius: 4px;
}

@media (max-width: 1024px) {
  .site-footer__cols {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

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

@media (max-width: 767px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .site-header__inner {
    height: var(--header-height-mobile);
    padding-left: 16px;
    padding-right: 16px;
    gap: 12px;
  }

  .site-header__brand-name {
    font-size: 1.05rem;
  }

  .site-header__brand-sub {
    font-size: 0.6rem;
    letter-spacing: 0.2em;
  }

  .crown-mark {
    width: 28px;
    height: 22px;
  }

  .site-header__cta {
    padding: 8px 16px;
    font-size: 0.8rem;
    margin-left: 0;
  }

  .site-header__toggle {
    display: flex;
    width: 40px;
    height: 40px;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height-mobile);
    left: 0;
    right: 0;
    background: rgba(10, 31, 68, 0.98);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    padding: 16px 20px 32px;
    border-bottom: 2px solid rgba(212, 175, 55, 0.4);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.3);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
    max-height: calc(100vh - var(--header-height-mobile));
    overflow-y: auto;
    z-index: 999;
  }

  .site-nav[data-open] {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

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

  .site-nav__link {
    display: block;
    padding: 14px 20px;
    font-size: 1rem;
    border-radius: 14px;
    color: rgba(255, 255, 255, 0.9);
  }

  .site-nav__link[aria-current="page"] {
    background: rgba(212, 175, 55, 0.16);
    box-shadow: inset 0 0 0 1px rgba(212, 175, 55, 0.3);
  }

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

  .site-footer__container {
    padding-top: 48px;
    padding-bottom: 40px;
  }

  .site-footer__cols {
    grid-template-columns: 1fr;
    gap: 36px;
  }

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

  .site-footer__tagline {
    max-width: 100%;
  }

  .site-footer__trust {
    max-width: 100%;
  }

  .site-footer__bottom-inner {
    flex-direction: column;
    text-align: center;
    justify-content: center;
  }

  .section {
    padding-top: 56px;
    padding-bottom: 56px;
  }
}

@media (min-width: 768px) and (max-width: 1024px) {
  .site-nav__link {
    padding: 9px 12px;
    font-size: 0.82rem;
  }

  .site-header__cta {
    padding: 8px 16px;
    font-size: 0.82rem;
  }

  .site-header__brand-name {
    font-size: 1.1rem;
  }

  .site-header__brand-sub {
    font-size: 0.6rem;
  }
}

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

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

  .site-header,
  .site-header__progress,
  .site-header__toggle,
  .site-nav {
    transition: none;
  }
}