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

:root {
  --color-primary: #1A3A5C;
  --color-primary-light: #2A5A7C;
  --color-primary-dark: #0F2440;
  --color-secondary: #F5F7FA;
  --color-accent: #D93623;
  --color-accent-hover: #B52A1A;
  --color-gold: #C9975A;
  --color-gold-light: #E0B87A;
  --color-text: #1C1C1E;
  --color-text-light: #B0B8C4;
  --color-text-white: #FFFFFF;
  --color-link: #2B6CB0;
  --color-warning: #E53E3E;
  --color-border: #E2E6EA;
  --color-stripe-blue: #1A3A5C;
  --color-stripe-white: #F5F7FA;
  --color-stripe-red: #D93623;
  --color-stripe-gold: #C9975A;
  --color-stripe-dark: #0F2440;
  --font-heading: 'Noto Sans SC Bold', 'PingFang SC Semibold', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', sans-serif;
  --font-numeric: 'JetBrains Mono', monospace;
  --font-size-base: 16px;
  --ratio: 1.25;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.12);
  --shadow-lg: 0 16px 40px rgba(0,0,0,0.16);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --header-bg: var(--color-primary);
  --footer-bg: var(--color-primary-dark);
}

html {
  scroll-behavior: smooth;
  font-size: var(--font-size-base);
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-secondary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

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

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition);
}

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

ul, ol {
  list-style: none;
}

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

/* --- Skip Link --- */
.site-skip {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-accent);
  color: var(--color-text-white);
  border-radius: var(--radius-sm);
  font-weight: 700;
  transition: top 0.3s;
}

.site-skip:focus {
  top: 0.5rem;
}

/* --- Scroll Progress --- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 4px;
  background: var(--color-accent);
  z-index: 9998;
  transition: width 0.1s linear;
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  .scroll-progress {
    transition: none;
  }
}

/* --- Site Header --- */
.site-header {
  background: var(--header-bg);
  position: relative;
  z-index: 1000;
  box-shadow: 0 2px 20px rgba(0,0,0,0.15);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-xl);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
}

/* Brand */
.site-brand {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-shrink: 0;
}

.brand-icon {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 44px;
}

.brand-stripe {
  display: block;
  width: 6px;
  border-radius: 3px 3px 0 0;
  transition: height 0.4s ease;
}

.stripe-blue {
  background: var(--color-stripe-blue);
  height: 28px;
}

.stripe-white {
  background: var(--color-stripe-white);
  height: 36px;
}

.stripe-red {
  background: var(--color-stripe-red);
  height: 44px;
}

.stripe-gold {
  background: var(--color-stripe-gold);
  height: 32px;
}

.stripe-dark {
  background: var(--color-stripe-dark);
  height: 24px;
}

@keyframes banner-wave {
  0%, 100% { transform: scaleY(1); }
  50% { transform: scaleY(1.08); }
}

.brand-stripe {
  animation: banner-wave 3s ease-in-out infinite;
  transform-origin: bottom;
}

.stripe-blue { animation-delay: 0s; }
.stripe-white { animation-delay: 0.2s; }
.stripe-red { animation-delay: 0.4s; }
.stripe-gold { animation-delay: 0.6s; }
.stripe-dark { animation-delay: 0.8s; }

@media (prefers-reduced-motion: reduce) {
  .brand-stripe {
    animation: none;
  }
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-text-white);
  letter-spacing: 0.05em;
  text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

/* Nav Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  gap: 5px;
  padding: var(--space-xs);
  transition: border-color var(--transition);
}

.nav-toggle:hover, .nav-toggle:focus-visible {
  border-color: var(--color-gold);
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-white);
  border-radius: 2px;
  transition: all var(--transition);
}

/* Navigation */
.site-nav {
  flex: 1 1 100%;
  display: flex;
  justify-content: center;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-xs);
}

.nav-item {
  display: flex;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  color: rgba(255,255,255,0.85);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-xl);
  transition: all var(--transition);
  white-space: nowrap;
  position: relative;
}

.nav-link .icon-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: transparent;
  transition: background var(--transition), transform var(--transition);
  transform: scale(0.6);
}

.nav-link:hover .icon-dot,
.nav-link:focus-visible .icon-dot {
  background: var(--color-gold);
  transform: scale(1);
}

.nav-link:hover, .nav-link:focus-visible {
  color: var(--color-text-white);
  background: rgba(201, 151, 90, 0.15);
}

.nav-link[aria-current="page"] {
  color: var(--color-text-white);
  background: rgba(201, 151, 90, 0.2);
  box-shadow: inset 0 -2px 0 var(--color-gold);
}

.nav-link[aria-current="page"] .icon-dot {
  background: var(--color-gold);
  transform: scale(1);
}

/* --- Site Footer --- */
.site-footer {
  background: var(--footer-bg);
  color: rgba(255,255,255,0.85);
  padding: var(--space-3xl) var(--space-xl) var(--space-xl);
  margin-top: var(--space-3xl);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand-name {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-text-white);
  margin-bottom: var(--space-sm);
}

.footer-desc {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

.footer-label {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-gold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-md);
  position: relative;
  padding-bottom: var(--space-sm);
}

.footer-label::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background: var(--color-gold);
  border-radius: 1px;
}

.footer-contact, .footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-link {
  color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
  transition: color var(--transition);
}

.footer-link:hover, .footer-link:focus-visible {
  color: var(--color-gold);
}

.footer-address {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  font-style: normal;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-lg);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
}

.footer-icp, .footer-note, .footer-copy {
  margin: 0;
}

/* --- Shared Components --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-xl);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  border: 2px solid transparent;
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  background: var(--color-accent);
  color: var(--color-text-white);
}

.btn:hover, .btn:focus-visible {
  background: var(--color-accent-hover);
  color: var(--color-text-white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-outline:hover, .btn-outline:focus-visible {
  background: var(--color-accent);
  color: var(--color-text-white);
}

.card {
  background: var(--color-text-white);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

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

@media (prefers-reduced-motion: reduce) {
  .card-hover:hover {
    transform: none;
  }
}

.section-title {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  display: block;
  width: 60%;
  height: 3px;
  background: var(--color-gold);
  border-radius: 2px;
  margin-top: var(--space-sm);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-md);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-xl);
  background: rgba(201, 151, 90, 0.12);
  color: var(--color-gold);
  border: 1px solid var(--color-gold);
}

.tag-filled {
  background: var(--color-accent);
  color: var(--color-text-white);
  border-color: var(--color-accent);
}

.badge {
  font-family: var(--font-numeric);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  padding: var(--space-xs) var(--space-sm);
  background: rgba(26, 58, 92, 0.06);
  border-radius: var(--radius-sm);
}

.divider {
  border: none;
  height: 1px;
  background: var(--color-border);
  margin: var(--space-xl) 0;
}

.divider-gold {
  background: var(--color-gold);
  height: 2px;
  opacity: 0.3;
}

.data-value {
  font-family: var(--font-numeric);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
}

.text-note {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

/* --- Accordion --- */
.accordion {
  border-radius: var(--radius-md);
  overflow: hidden;
}

.accordion-item {
  border-bottom: 1px solid var(--color-border);
}

.accordion-item:last-child {
  border-bottom: none;
}

[data-accordion-toggle] {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: transparent;
  border: none;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  text-align: left;
  transition: background var(--transition);
  border-radius: 0;
}

[data-accordion-toggle]:hover, [data-accordion-toggle]:focus-visible {
  background: rgba(26, 58, 92, 0.04);
}

.accordion-icon {
  display: block;
  width: 12px;
  height: 12px;
  border-right: 2px solid var(--color-gold);
  border-bottom: 2px solid var(--color-gold);
  transform: rotate(45deg);
  transition: transform var(--transition);
  flex-shrink: 0;
}

[data-expanded] .accordion-icon {
  transform: rotate(-135deg);
}

[data-accordion-content] {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 var(--space-lg);
}

[data-expanded] + [data-accordion-content] {
  max-height: 600px;
  padding: 0 var(--space-lg) var(--space-lg);
}

@media (prefers-reduced-motion: reduce) {
  [data-accordion-content] {
    transition: none;
  }
  [data-expanded] + [data-accordion-content] {
    max-height: none;
  }
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .header-inner {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
  }

  .nav-toggle {
    display: flex;
    order: 2;
  }

  .site-brand {
    order: 1;
  }

  .brand-name {
    font-size: 1.35rem;
  }

  .brand-icon {
    height: 32px;
  }

  .brand-stripe {
    width: 5px;
  }

  .stripe-blue { height: 20px; }
  .stripe-white { height: 26px; }
  .stripe-red { height: 32px; }
  .stripe-gold { height: 24px; }
  .stripe-dark { height: 18px; }

  .site-nav {
    order: 3;
    flex: 1 1 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.3s ease;
    opacity: 0;
    visibility: hidden;
  }

  .site-nav[data-open] {
    max-height: 500px;
    opacity: 1;
    visibility: visible;
    padding-top: var(--space-md);
  }

  @media (prefers-reduced-motion: reduce) {
    .site-nav {
      transition: none;
      max-height: 0;
    }
    .site-nav[data-open] {
      max-height: none;
    }
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-xs);
  }

  .nav-link {
    justify-content: center;
    padding: var(--space-md);
    font-size: 1rem;
    border-radius: var(--radius-md);
  }

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

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    gap: var(--space-sm);
  }

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

@media (min-width: 769px) and (max-width: 1024px) {
  .header-inner {
    padding: var(--space-lg) var(--space-xl);
  }

  .brand-name {
    font-size: 1.5rem;
  }

  .nav-link {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.9rem;
  }

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

@media (min-width: 1025px) {
  .site-nav {
    flex: 0 1 auto;
  }

  .nav-link {
    padding: var(--space-sm) var(--space-lg);
  }
}

/* --- Image container base --- */
.img-container {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--color-border);
}

.img-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: rgba(255,255,255,0.4);
  font-size: 0.9rem;
  border-radius: var(--radius-md);
}