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

:root {
  --color-primary-dark-green: #0A5C36;
  --color-primary-gold: #C9A84C;
  --color-secondary-white: #FFFFFF;
  --color-secondary-light-gray: #F2F2F2;
  --color-secondary-mid-gray: #B0B0B0;
  --color-accent-green-light: #1E7A4D;
  --color-accent-gold-light: #E0C56A;
  --color-background-dark: #0D1B1A;
  --color-text-dark: #1A1A1A;
  --color-text-on-dark: #EAEAEA;
  --font-headings: 'Plus Jakarta Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-data: 'JetBrains Mono', 'Consolas', monospace;
  --font-size-h1: clamp(2.4rem, 5vw, 3.6rem);
  --font-size-h2: clamp(1.8rem, 3.5vw, 2.6rem);
  --font-size-h3: clamp(1.2rem, 2vw, 1.6rem);
  --font-size-body: 1rem;
  --font-size-small: 0.875rem;
  --font-size-index: 0.75rem;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 5rem;
  --max-width: 1200px;
  --header-height: 72px;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.10);
  --shadow-glow-gold: 0 0 20px rgba(201,168,76,0.25);
}

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

body {
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  line-height: 1.6;
  color: var(--color-text-dark);
  background: var(--color-secondary-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

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

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

ul, ol {
  list-style: none;
}

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

/* ---------- SKIP LINK ---------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--spacing-md);
  z-index: 10000;
  background: var(--color-primary-dark-green);
  color: var(--color-secondary-white);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: 0 0 4px 4px;
  font-size: var(--font-size-small);
  font-weight: 600;
  transition: top var(--transition-base);
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--color-primary-gold);
  outline-offset: 2px;
}

/* ---------- CONTAINER ---------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }
}

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0.625rem 1.5rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--font-size-small);
  border-radius: 2px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  letter-spacing: 0.02em;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(255,255,255,0.2), transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.btn:hover::after {
  opacity: 1;
}

.btn:active::after {
  opacity: 0.3;
}

.btn--primary {
  background: var(--color-primary-gold);
  color: var(--color-background-dark);
  border: 1px solid var(--color-primary-gold);
}

.btn--primary:hover {
  background: var(--color-accent-gold-light);
  border-color: var(--color-accent-gold-light);
  color: var(--color-background-dark);
  box-shadow: var(--shadow-glow-gold);
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary-gold);
  border: 1px solid var(--color-primary-gold);
}

.btn--ghost:hover {
  background: rgba(201,168,76,0.08);
  color: var(--color-accent-gold-light);
  border-color: var(--color-accent-gold-light);
}

/* ---------- BREADCRUMB ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-index);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-secondary-mid-gray);
  padding: var(--spacing-md) 0;
}

.breadcrumb a {
  color: var(--color-primary-dark-green);
  transition: color var(--transition-base);
}

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

.breadcrumb span {
  color: var(--color-text-dark);
  font-weight: 500;
}

.breadcrumb li + li::before {
  content: '/';
  margin-right: var(--spacing-sm);
  color: var(--color-secondary-mid-gray);
}

/* ---------- SECTION ---------- */
.section {
  padding: var(--spacing-xxl) 0;
}

.section--dark {
  background: var(--color-background-dark);
  color: var(--color-text-on-dark);
}

.section--light-gray {
  background: var(--color-secondary-light-gray);
}

/* ---------- GRID ---------- */
.grid {
  display: grid;
  gap: var(--spacing-xl);
}

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

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

@media (max-width: 900px) {
  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 901px) and (max-width: 1100px) {
  .grid--3 {
    grid-template-columns: 1fr 1fr;
  }
}

/* ---------- HEADER ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  transition: background var(--transition-base), box-shadow var(--transition-base);
  will-change: background, box-shadow;
}

.site-header[data-transparent="true"] {
  background: transparent;
  box-shadow: none;
}

.site-header[data-transparent="false"] {
  background: var(--color-primary-dark-green);
  box-shadow: 0 2px 20px rgba(0,0,0,0.20);
}

.site-header[data-transparent="false"] .header__logo-text {
  color: var(--color-primary-gold);
}

.site-header[data-transparent="false"] .header__nav-link {
  color: var(--color-text-on-dark);
}

.site-header[data-transparent="false"] .header__nav-link:hover {
  color: var(--color-primary-gold);
}

.site-header[data-transparent="false"] .header__nav-link[aria-current="page"] {
  color: var(--color-primary-gold);
  border-bottom-color: var(--color-primary-gold);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  height: 100%;
  position: relative;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  z-index: 1001;
  flex-shrink: 0;
}

.header__logo-text {
  font-family: var(--font-headings);
  font-weight: 700;
  font-size: clamp(1.4rem, 2.8vw, 1.9rem);
  letter-spacing: -0.02em;
  color: var(--color-primary-dark-green);
  transition: color var(--transition-base);
  line-height: 1;
}

.site-header[data-transparent="true"] .header__logo-text {
  color: var(--color-secondary-white);
  text-shadow: 0 1px 8px rgba(0,0,0,0.25);
}

.header__logo-deco {
  display: block;
  width: 2px;
  height: 1.4em;
  background: var(--color-primary-gold);
  transform: rotate(15deg);
  flex-shrink: 0;
  opacity: 0.8;
}

/* ---------- HEADER NAV ---------- */
.header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.header__nav-link {
  font-family: var(--font-body);
  font-size: var(--font-size-index);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-dark);
  padding: var(--spacing-xs) 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-base), border-color var(--transition-base);
  white-space: nowrap;
}

.site-header[data-transparent="true"] .header__nav-link {
  color: var(--color-text-on-dark);
  text-shadow: 0 1px 6px rgba(0,0,0,0.15);
}

.header__nav-link:hover,
.header__nav-link:focus-visible {
  color: var(--color-primary-gold);
  border-bottom-color: var(--color-primary-gold);
}

.header__nav-link[aria-current="page"] {
  color: var(--color-primary-gold);
  border-bottom-color: var(--color-primary-gold);
  font-weight: 600;
}

.site-header[data-transparent="true"] .header__nav-link[aria-current="page"] {
  color: var(--color-accent-gold-light);
  border-bottom-color: var(--color-accent-gold-light);
}

/* ---------- HEADER CTA ---------- */
.header__cta {
  flex-shrink: 0;
  margin-left: var(--spacing-md);
  z-index: 1001;
}

.header__cta.btn--primary {
  padding: 0.5rem 1.25rem;
  font-size: var(--font-size-index);
  letter-spacing: 0.05em;
}

/* ---------- HEADER TOGGLE ---------- */
.header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  gap: 5px;
  z-index: 1001;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.header__toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary-dark-green);
  border-radius: 1px;
  transition: all var(--transition-base);
  transform-origin: center;
}

.site-header[data-transparent="true"] .header__toggle-bar {
  background: var(--color-secondary-white);
}

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

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

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

/* ---------- PROGRESS BAR ---------- */
.header__progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-primary-gold), var(--color-accent-gold-light));
  transition: width 0.1s linear;
  z-index: 1;
  will-change: width;
}

.site-header[data-transparent="true"] .header__progress {
  opacity: 0.9;
}

/* ---------- MOBILE NAV ---------- */
@media (max-width: 860px) {
  .header__toggle {
    display: flex;
  }

  .header__cta {
    display: none;
  }

  .header__nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 280px;
    max-width: 80vw;
    background: var(--color-primary-dark-green);
    z-index: 999;
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    padding: calc(var(--header-height) + var(--spacing-lg)) var(--spacing-lg) var(--spacing-xl);
    box-shadow: -8px 0 30px rgba(0,0,0,0.25);
    overflow-y: auto;
    will-change: transform;
  }

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

  .header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
  }

  .header__nav-link {
    font-size: var(--font-size-small);
    color: var(--color-text-on-dark);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid rgba(255,255,255,0.10);
    width: 100%;
    letter-spacing: 0.06em;
  }

  .header__nav-link:hover {
    color: var(--color-primary-gold);
    border-bottom-color: var(--color-primary-gold);
  }

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

  .site-header[data-transparent="true"] .header__toggle-bar {
    background: var(--color-secondary-white);
  }
}

@media (min-width: 861px) {
  .header__nav {
    position: static;
    transform: none;
    background: transparent;
    box-shadow: none;
    padding: 0;
    width: auto;
  }
}

/* ---------- FOOTER ---------- */
.site-footer {
  background: var(--color-background-dark);
  color: var(--color-text-on-dark);
  border-top: 2px solid var(--color-primary-gold);
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-primary-gold), transparent);
  opacity: 0.4;
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-lg);
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: var(--spacing-xl) var(--spacing-lg);
  align-items: start;
  position: relative;
}

.footer__brand {
  grid-column: 1;
}

.footer__logo {
  font-family: var(--font-headings);
  font-weight: 700;
  font-size: 1.6rem;
  color: var(--color-primary-gold);
  display: inline-block;
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.01em;
  transition: color var(--transition-base);
}

.footer__logo:hover {
  color: var(--color-accent-gold-light);
}

.footer__tagline {
  font-size: var(--font-size-small);
  color: var(--color-secondary-mid-gray);
  line-height: 1.6;
  max-width: 320px;
  margin-top: var(--spacing-xs);
}

.footer__links {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer__links-title,
.footer__contact-title {
  font-family: var(--font-headings);
  font-weight: 600;
  font-size: var(--font-size-index);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary-gold);
  margin-bottom: var(--spacing-xs);
  border-bottom: 1px solid rgba(201,168,76,0.25);
  padding-bottom: var(--spacing-xs);
}

.footer__link {
  font-size: var(--font-size-small);
  color: var(--color-text-on-dark);
  transition: color var(--transition-base);
  padding: var(--spacing-xs) 0;
}

.footer__link:hover {
  color: var(--color-primary-gold);
}

.footer__contact {
  grid-column: 3;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer__contact-item {
  font-size: var(--font-size-small);
  color: var(--color-secondary-light-gray);
  line-height: 1.5;
}

.footer__contact-item:first-of-type {
  color: var(--color-primary-gold);
}

.footer__contact-item:first-of-type:hover {
  color: var(--color-accent-gold-light);
}

.footer__meta {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255,255,255,0.06);
  margin-top: var(--spacing-sm);
  font-size: var(--font-size-small);
  color: var(--color-secondary-mid-gray);
  gap: var(--spacing-md);
}

.footer__meta-icp {
  font-size: var(--font-size-index);
  letter-spacing: 0.05em;
}

.footer__meta-copy {
  font-size: var(--font-size-index);
}

@media (max-width: 900px) {
  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .footer__brand,
  .footer__links,
  .footer__contact {
    grid-column: 1;
  }

  .footer__meta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }
}

/* ---------- REVEAL ANIMATION ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  will-change: opacity, transform;
}

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

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .header__progress {
    display: none;
  }

  .header__nav {
    transition: none;
  }

  .btn::after {
    display: none;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ---------- RESPONSIVE HELPERS ---------- */
@media (max-width: 480px) {
  :root {
    --header-height: 60px;
  }

  .header__inner {
    padding: 0 var(--spacing-md);
  }

  .header__logo-text {
    font-size: 1.2rem;
  }

  .footer__inner {
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md);
  }
}

@media (min-width: 481px) and (max-width: 860px) {
  .header__inner {
    padding: 0 var(--spacing-md);
  }
}

@media (min-width: 861px) and (max-width: 1100px) {
  .header__nav-list {
    gap: var(--spacing-md);
  }

  .header__nav-link {
    font-size: 0.7rem;
  }
}