:root {
  --color-primary: #0B1B3A;
  --color-primary-deep: #081229;
  --color-accent: #C9A063;
  --color-accent-light: #E8C47C;
  --color-bg: #F8F6F1;
  --color-text: #1A2332;
  --color-text-muted: #5A6577;
  --color-border: #D9DCE2;
  --color-danger: #C0392B;
  --font-heading: "Playfair Display", "Songti SC", "SimSun", Georgia, serif;
  --font-body: Inter, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-size-hero: clamp(40px, 6vw, 64px);
  --font-size-page: clamp(28px, 4vw, 40px);
  --font-size-section: clamp(22px, 3vw, 28px);
  --container: 1200px;
  --header-height: 72px;
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 32px;
  --space-lg: 64px;
  --space-xl: 96px;
  --radius-sm: 4px;
  --radius-lg: 8px;
  --shadow-card: 0 2px 16px rgba(11, 27, 58, 0.06);
  --transition-fast: 0.2s ease;
  --transition-slow: 0.4s ease;
}

*,
*::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: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image: radial-gradient(circle at 92% 4%, rgba(201, 160, 99, 0.06), transparent 42%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

ul,
ol {
  list-style: none;
}

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

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

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
}

h1 {
  font-size: var(--font-size-hero);
}

h2 {
  font-size: var(--font-size-page);
}

h3 {
  font-size: var(--font-size-section);
}

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

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

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

.skip-link {
  position: fixed;
  top: -100px;
  left: var(--space-sm);
  z-index: 3000;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-accent);
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  box-shadow: 0 4px 16px rgba(11, 27, 58, 0.3);
  transition: top var(--transition-fast);
}

.skip-link:focus-visible {
  top: 0;
}

.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;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

@media (max-width: 600px) {
  :root {
    --header-height: 64px;
    --space-lg: 48px;
    --space-xl: 72px;
  }

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 2100;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-light) 55%, rgba(201, 160, 99, 0.4) 100%);
  box-shadow: 0 0 8px rgba(201, 160, 99, 0.4);
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-primary);
  background-image:
    repeating-linear-gradient(0deg, transparent, transparent 3px, rgba(248, 246, 241, 0.008) 3px, rgba(248, 246, 241, 0.008) 4px),
    repeating-linear-gradient(90deg, transparent, transparent 3px, rgba(248, 246, 241, 0.008) 3px, rgba(248, 246, 241, 0.008) 4px);
  border-bottom: 1px solid rgba(201, 160, 99, 0.18);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  height: var(--header-height);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
}

.brand-logo {
  color: var(--color-accent);
  display: grid;
  place-items: center;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.1;
  color: var(--color-bg);
  white-space: nowrap;
}

.brand-tagline {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  white-space: nowrap;
}

.main-nav {
  display: block;
}

.nav-list {
  counter-reset: nav-index;
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  position: relative;
  display: block;
  padding: 10px 13px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(248, 246, 241, 0.78);
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav-link::before {
  counter-increment: nav-index;
  content: "0" counter(nav-index) " / ";
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  opacity: 0.55;
  margin-right: 3px;
}

.nav-link:hover {
  color: var(--color-bg);
}

.nav-link:hover::before {
  opacity: 1;
}

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

.nav-link[aria-current="page"]::before {
  color: rgba(248, 246, 241, 0.6);
  opacity: 1;
}

.nav-toggle {
  display: none;
  position: relative;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  background: rgba(248, 246, 241, 0.06);
  border: 1px solid rgba(201, 160, 99, 0.3);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.nav-toggle:hover {
  background: rgba(248, 246, 241, 0.1);
  border-color: var(--color-accent);
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-footer {
  position: relative;
  background-color: var(--color-primary);
  background-image: linear-gradient(180deg, rgba(201, 160, 99, 0.05), transparent 240px);
  color: rgba(248, 246, 241, 0.72);
  border-top: 1px solid rgba(201, 160, 99, 0.2);
  margin-top: var(--space-xl);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr 1fr;
  gap: var(--space-lg);
  padding: var(--space-xl) 0 var(--space-lg);
}

.footer-brand-mark {
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.footer-brand-name {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-bg);
  margin-bottom: var(--space-xs);
}

.footer-tagline {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.footer-trust {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(248, 246, 241, 0.5);
  max-width: 360px;
}

.footer-heading {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid rgba(201, 160, 99, 0.2);
}

.footer-link-list,
.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link-list a,
.footer-contact-list {
  font-size: 14px;
  line-height: 1.5;
  color: rgba(248, 246, 241, 0.66);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer-link-list a:hover {
  color: var(--color-accent-light);
  padding-left: 4px;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xs);
  padding: var(--space-md) 0;
  border-top: 1px solid rgba(248, 246, 241, 0.1);
  font-size: 13px;
  color: rgba(248, 246, 241, 0.42);
}

.back-top {
  position: fixed;
  right: var(--space-md);
  bottom: calc(var(--space-md) + 64px);
  z-index: 1400;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 1px solid rgba(201, 160, 99, 0.45);
  color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition-slow), visibility var(--transition-slow), transform var(--transition-slow), background var(--transition-fast), border-color var(--transition-fast);
}

.back-top:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-primary);
}

.back-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.contact-fab {
  position: fixed;
  right: var(--space-md);
  bottom: var(--space-md);
  z-index: 1300;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  background: var(--color-accent);
  color: var(--color-primary);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  box-shadow: 0 6px 24px rgba(201, 160, 99, 0.45);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.contact-fab:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(201, 160, 99, 0.55);
  background: var(--color-accent-light);
}

.contact-fab-text {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-primary);
  box-shadow: 0 2px 12px rgba(201, 160, 99, 0.25);
}

.btn-accent:hover {
  background: var(--color-accent-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(201, 160, 99, 0.35);
}

.btn-outline {
  background: transparent;
  border-color: currentColor;
  color: var(--color-primary);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.btn-ghost {
  background: rgba(248, 246, 241, 0.08);
  border-color: rgba(201, 160, 99, 0.3);
  color: var(--color-bg);
}

.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.breadcrumb {
  padding: var(--space-sm) 0;
  font-size: 13px;
  color: var(--color-text-muted);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.breadcrumb a {
  color: var(--color-primary);
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.breadcrumb li + li::before {
  content: "/";
  margin: 0 var(--space-xs);
  color: var(--color-border);
  font-size: 11px;
}

.breadcrumb [aria-current="page"] {
  color: var(--color-text-muted);
}

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

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

.eyebrow::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 1px;
  background: var(--color-accent);
}

.section-title {
  font-family: var(--font-heading);
  font-size: var(--font-size-section);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.25;
  margin-top: var(--space-xs);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-md);
}

.col-3 {
  grid-column: span 3;
}

.col-4 {
  grid-column: span 4;
}

.col-6 {
  grid-column: span 6;
}

.col-8 {
  grid-column: span 8;
}

.col-9 {
  grid-column: span 9;
}

.col-12 {
  grid-column: span 12;
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--space-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(11, 27, 58, 0.08);
}

.card-body {
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.7;
}

.timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 var(--space-lg);
}

.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 4px;
  bottom: 4px;
  width: 1px;
  background: linear-gradient(to bottom, var(--color-accent) 0%, var(--color-border) 28%, var(--color-border) 100%);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-md);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: calc(-1 * var(--space-lg) + 1px);
  top: 4px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 2px solid var(--color-accent);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}

.filter-btn {
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.filter-btn[data-active] {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-bg);
}

.content {
  max-width: 760px;
  color: var(--color-text-muted);
  font-size: 16px;
  line-height: 1.8;
}

.content p {
  margin-bottom: var(--space-sm);
}

.content h2,
.content h3 {
  margin-top: var(--space-md);
  margin-bottom: var(--space-xs);
  color: var(--color-primary);
}

.content ul {
  list-style: disc;
  padding-left: 1.5em;
  margin-bottom: var(--space-sm);
}

.content ol {
  list-style: decimal;
  padding-left: 1.5em;
  margin-bottom: var(--space-sm);
}

.content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

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

@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: absolute;
    top: calc(100% + var(--space-xs));
    left: var(--space-sm);
    right: var(--space-sm);
    background: var(--color-primary);
    background-image: linear-gradient(160deg, rgba(201, 160, 99, 0.06), transparent 60%);
    border: 1px solid rgba(201, 160, 99, 0.28);
    border-radius: var(--radius-lg);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
    padding: var(--space-xs);
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 0;
  }

  .nav-link {
    padding: 13px var(--space-sm);
    border-bottom: 1px solid rgba(248, 246, 241, 0.06);
    border-radius: var(--radius-sm);
    font-size: 15px;
  }

  .nav-link:last-child {
    border-bottom: none;
  }

  .nav-link[aria-current="page"] {
    background: rgba(201, 160, 99, 0.08);
  }

  .grid-12 {
    gap: var(--space-sm);
  }

  .col-3,
  .col-4,
  .col-6,
  .col-8,
  .col-9,
  .col-12 {
    grid-column: span 12;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }
}

@media (max-width: 600px) {
  .brand-name {
    font-size: 18px;
  }

  .brand-logo svg {
    width: 30px;
    height: 30px;
  }

  .nav-toggle {
    width: 38px;
    height: 38px;
  }

  .nav-toggle-bar {
    width: 16px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .contact-fab {
    width: 48px;
    height: 48px;
    padding: 0;
    justify-content: center;
    border-radius: 50%;
  }

  .contact-fab-text {
    display: none;
  }

  .back-top {
    bottom: calc(var(--space-md) + 56px);
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }
}

@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;
  }

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

  .scroll-progress {
    display: none;
  }
}