/*
 * Meridian Strategy Advisory — Main Stylesheet
 * 经线战略咨询 — 地缘政治与投资战略分析
 * Version 1.0
 */

/* ============================================================
   1. CSS Custom Properties / Design Tokens
   ============================================================ */
:root {
  /* Primary Palette */
  --color-navy-900: #0A1628;
  --color-navy-800: #0F1F38;
  --color-navy-700: #162D4E;
  --color-navy-600: #1D3A64;
  --color-navy-500: #2A4E7F;

  /* Accent — Gold / Brass */
  --color-gold-400: #C8A84E;
  --color-gold-300: #D4BC6E;
  --color-gold-200: #E0D08E;
  --color-gold-100: #EDE4B8;

  /* Neutral */
  --color-white: #FFFFFF;
  --color-gray-100: #F2F3F5;
  --color-gray-200: #DDE0E4;
  --color-gray-300: #B8BDC4;
  --color-gray-400: #8B919C;
  --color-gray-500: #5F6570;
  --color-gray-600: #3D4249;
  --color-gray-700: #2A2E33;

  /* Semantic */
  --color-success: #3B875B;
  --color-warning: #C8963E;
  --color-error: #C44D4D;

  /* Typography */
  --font-display: 'Playfair Display', 'Georgia', 'Times New Roman', serif;
  --font-sans: 'Inter', 'Helvetica Neue', 'Segoe UI', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Consolas', 'Monaco', monospace;

  /* Sizing & Spacing */
  --container-max: 1200px;
  --container-narrow: 820px;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Borders & Shadows */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(10, 22, 40, 0.12);
  --shadow-md: 0 4px 12px rgba(10, 22, 40, 0.15);
  --shadow-lg: 0 8px 30px rgba(10, 22, 40, 0.20);
  --shadow-xl: 0 20px 60px rgba(10, 22, 40, 0.30);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;

  /* Layout */
  --header-height: 80px;
}

/* ============================================================
   2. Reset & Base
   ============================================================ */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-gray-600);
  background-color: var(--color-white);
  overflow-x: hidden;
}

::selection {
  background-color: var(--color-gold-400);
  color: var(--color-navy-900);
}

/* ============================================================
   3. Typography
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-navy-900);
}

h1 { font-size: clamp(2.5rem, 5vw, 3.75rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(2rem, 4vw, 2.75rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p { margin-bottom: var(--space-md); }

a {
  color: var(--color-navy-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-gold-400);
}

strong { font-weight: 600; color: var(--color-navy-900); }

/* ============================================================
   4. Utility Classes
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.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;
}

/* Gold accent line — used as section dividers */
.accent-line {
  display: block;
  width: 60px;
  height: 3px;
  background: var(--color-gold-400);
  margin-bottom: var(--space-lg);
}

.accent-line.centered {
  margin-left: auto;
  margin-right: auto;
}

.section-header {
  margin-bottom: var(--space-3xl);
}

.section-header h2 {
  margin-bottom: var(--space-md);
}

.section-header p {
  font-size: 1.125rem;
  color: var(--color-gray-500);
  max-width: 600px;
}

/* ============================================================
   5. Header & Navigation
   ============================================================ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(10, 22, 40, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.site-header.scrolled {
  background: rgba(10, 22, 40, 0.98);
  box-shadow: var(--shadow-lg);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
}

.logo-icon {
  width: 36px;
  height: 36px;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.01em;
  line-height: 1.15;
}

.logo-text small {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.625rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-gold-400);
}

/* Desktop Nav */
.main-nav ul {
  display: flex;
  list-style: none;
  gap: var(--space-xl);
  align-items: center;
}

.main-nav a {
  color: rgba(255, 255, 255, 0.80);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  transition: color var(--transition-fast);
  padding: var(--space-sm) 0;
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0;
  height: 2px;
  background: var(--color-gold-400);
  transition: width var(--transition-base);
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-white);
}

.main-nav a:hover::after,
.main-nav a.active::after {
  width: 100%;
}

/* CTA Button in Nav */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.65rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-navy-900);
  background: var(--color-gold-400);
  border: 2px solid var(--color-gold-400);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary:hover {
  background: transparent;
  color: var(--color-gold-400);
}

.btn-primary-outline {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.65rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-white);
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary-outline:hover {
  border-color: var(--color-gold-400);
  color: var(--color-gold-400);
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  transition: all var(--transition-fast);
  transform-origin: center;
}

.mobile-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   6. Hero Section
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--color-navy-900);
  overflow: hidden;
  padding-top: var(--header-height);
}

/* Geometric map-like background pattern (CSS-only) */
.hero-bg-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.06;
  background-image:
    linear-gradient(30deg, var(--color-gold-400) 1px, transparent 1px),
    linear-gradient(-30deg, var(--color-gold-400) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size:
    80px 80px,
    80px 80px,
    40px 40px,
    40px 40px;
}

/* Subtle globe-style radial glow */
.hero-glow {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(200, 168, 78, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero-content {
  max-width: 700px;
}

.hero-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-gold-400);
  border: 1px solid rgba(200, 168, 78, 0.3);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-xl);
}

.hero h1 {
  color: var(--color-white);
  margin-bottom: var(--space-lg);
}

.hero h1 em {
  font-style: normal;
  color: var(--color-gold-400);
}

.hero-subtitle {
  font-size: 1.2rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: var(--space-2xl);
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: var(--space-2xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: rgba(255, 255, 255, 0.35);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: floatDown 2s ease-in-out infinite;
}

.hero-scroll-indicator svg {
  width: 16px;
  height: 16px;
}

@keyframes floatDown {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ============================================================
   7. Sections (Shared Styles)
   ============================================================ */
section {
  padding: var(--space-5xl) 0;
}

section.bg-navy {
  background: var(--color-navy-900);
  color: rgba(255, 255, 255, 0.75);
}

section.bg-navy h2,
section.bg-navy h3,
section.bg-navy h4 {
  color: var(--color-white);
}

section.bg-navy .section-header p {
  color: rgba(255, 255, 255, 0.55);
}

section.bg-light {
  background: var(--color-gray-100);
}

/* ============================================================
   8. Expertise / Service Cards
   ============================================================ */
.expertise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.expertise-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  padding: var(--space-2xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.expertise-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--color-gold-400);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.expertise-card:hover {
  border-color: transparent;
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.expertise-card:hover::before {
  transform: scaleX(1);
}

.expertise-card-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(200, 168, 78, 0.1);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  color: var(--color-gold-400);
}

.expertise-card h3 {
  margin-bottom: var(--space-sm);
  font-size: 1.2rem;
}

.expertise-card p {
  color: var(--color-gray-500);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* ============================================================
   9. Region Focus Cards (Dark variant)
   ============================================================ */
.region-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-xl);
}

.region-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: var(--space-2xl);
  transition: all var(--transition-base);
}

.region-card:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: var(--color-gold-400);
}

.region-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold-400);
  background: rgba(200, 168, 78, 0.12);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
}

.region-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

.region-card p {
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* ============================================================
   10. About Founder (Homepage snippet)
   ============================================================ */
.about-snippet {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.about-image-wrapper {
  position: relative;
}

.about-image {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: var(--color-gray-200);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-400);
  font-size: 0.875rem;
  /* Placeholder — replace with actual photo */
}

.about-image-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.about-image-placeholder svg {
  width: 64px;
  height: 64px;
  opacity: 0.3;
}

.about-accent-box {
  position: absolute;
  bottom: -20px;
  right: -20px;
  width: 140px;
  height: 100px;
  background: var(--color-gold-400);
  border-radius: var(--radius-sm);
  z-index: -1;
}

.about-text .accent-line {
  margin-bottom: var(--space-lg);
}

.about-text h2 {
  margin-bottom: var(--space-lg);
}

.about-text p {
  color: var(--color-gray-500);
  margin-bottom: var(--space-lg);
}

.about-credentials {
  display: flex;
  gap: var(--space-2xl);
  margin: var(--space-xl) 0;
}

.credential-item {
  text-align: left;
}

.credential-number {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-gold-400);
}

.credential-label {
  font-size: 0.8rem;
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================================
   11. Testimonials / Trust
   ============================================================ */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
}

.testimonial-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  padding: var(--space-2xl);
  position: relative;
}

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: var(--space-lg);
  right: var(--space-xl);
  font-family: var(--font-display);
  font-size: 4rem;
  line-height: 1;
  color: rgba(200, 168, 78, 0.15);
  pointer-events: none;
}

.testimonial-card p {
  font-style: italic;
  color: var(--color-gray-500);
  margin-bottom: var(--space-lg);
}

.testimonial-author {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-navy-900);
}

.testimonial-author span {
  display: block;
  font-weight: 400;
  color: var(--color-gray-400);
  font-size: 0.8rem;
}

/* ============================================================
   12. Insight Cards (Articles)
   ============================================================ */
.insight-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--space-xl);
}

.insight-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-base);
}

.insight-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.insight-card-image {
  width: 100%;
  height: 200px;
  background: var(--color-navy-700);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.3);
  /* Replace with actual images */
}

.insight-card-body {
  padding: var(--space-xl);
}

.insight-card-meta {
  display: flex;
  gap: var(--space-md);
  font-size: 0.75rem;
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.insight-card-meta .category {
  color: var(--color-gold-400);
  font-weight: 600;
}

.insight-card h3 {
  font-size: 1.15rem;
  margin-bottom: var(--space-sm);
}

.insight-card h3 a {
  color: inherit;
  transition: color var(--transition-fast);
}

.insight-card h3 a:hover {
  color: var(--color-gold-400);
}

.insight-card p {
  color: var(--color-gray-500);
  font-size: 0.95rem;
  margin-bottom: var(--space-md);
}

.read-more {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gold-400);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.read-more::after {
  content: '→';
  transition: transform var(--transition-fast);
}

.read-more:hover::after {
  transform: translateX(4px);
}

/* ============================================================
   13. CTA Banner
   ============================================================ */
.cta-banner {
  background: linear-gradient(135deg, var(--color-navy-800) 0%, var(--color-navy-900) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gold-400), transparent);
}

.cta-banner h2 {
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.6);
  max-width: 560px;
  margin: 0 auto var(--space-2xl);
}

/* ============================================================
   14. Footer
   ============================================================ */
.site-footer {
  background: var(--color-navy-900);
  color: rgba(255, 255, 255, 0.5);
  padding: var(--space-4xl) 0 var(--space-2xl);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand p {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.45);
  max-width: 300px;
}

.footer-links h4 {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: var(--space-lg);
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.45);
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-gold-400);
}

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-bottom a {
  color: var(--color-gold-400);
}

/* ============================================================
   15. Page Headers (Inner Pages)
   ============================================================ */
.page-header {
  background: var(--color-navy-900);
  padding: calc(var(--header-height) + var(--space-5xl)) 0 var(--space-4xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header .hero-bg-pattern {
  opacity: 0.04;
}

.page-header h1 {
  color: var(--color-white);
  position: relative;
  z-index: 1;
}

.page-header p {
  color: rgba(255, 255, 255, 0.55);
  font-size: 1.1rem;
  max-width: 560px;
  margin: var(--space-md) auto 0;
  position: relative;
  z-index: 1;
}

.breadcrumb {
  position: relative;
  z-index: 1;
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: var(--space-xl);
}

.breadcrumb a {
  color: var(--color-gold-400);
}

/* ============================================================
   16. About Page — Detailed
   ============================================================ */
.about-detailed {
  padding: var(--space-5xl) 0;
}

.about-detailed-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: start;
}

.timeline {
  list-style: none;
  border-left: 2px solid var(--color-gray-200);
  padding-left: var(--space-xl);
}

.timeline li {
  position: relative;
  padding-bottom: var(--space-2xl);
}

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

.timeline li::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-xl) - 5px);
  top: 6px;
  width: 10px;
  height: 10px;
  background: var(--color-gold-400);
  border-radius: 50%;
}

.timeline-year {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-gold-400);
  letter-spacing: 0.1em;
}

.timeline h4 {
  margin: var(--space-xs) 0 var(--space-xs);
}

.timeline p {
  color: var(--color-gray-500);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* Values grid */
.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.value-item {
  text-align: center;
  padding: var(--space-xl);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
}

.value-item svg {
  margin-bottom: var(--space-md);
  color: var(--color-gold-400);
}

.value-item h4 {
  margin-bottom: var(--space-xs);
}

.value-item p {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  margin-bottom: 0;
}

/* ============================================================
   17. Insights Page
   ============================================================ */
.insights-page {
  padding: var(--space-5xl) 0;
}

.insight-filter {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-3xl);
  justify-content: center;
}

.insight-filter button {
  padding: 0.5rem 1.25rem;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  background: transparent;
  border: 1px solid var(--color-gray-200);
  border-radius: 100px;
  color: var(--color-gray-500);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.insight-filter button:hover,
.insight-filter button.active {
  background: var(--color-navy-900);
  border-color: var(--color-navy-900);
  color: var(--color-white);
}

/* Article detail page */
.article-body {
  max-width: 780px;
  margin: 0 auto;
  padding: var(--space-3xl) 0 var(--space-5xl);
}
.article-body p {
  font-size: 1.08rem;
  line-height: 1.82;
  margin-bottom: var(--space-lg);
  color: var(--color-navy-800);
}
.article-body h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--color-navy-900);
  margin: var(--space-3xl) 0 var(--space-md);
}
.article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-gray-200);
}
.article-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-gold-400);
  text-decoration: none;
  margin-top: var(--space-3xl);
}
.article-back:hover {
  color: var(--color-gold-300);
}

.article-meta .category {
  color: var(--color-gold-400);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.article-meta time {
  font-size: 0.75rem;
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.article-body blockquote {
  border-left: 3px solid var(--color-gold-400);
  padding-left: var(--space-xl);
  margin: var(--space-2xl) 0;
  color: var(--color-gray-500);
  font-style: italic;
}

/* ============================================================
   18. Contact Page
   ============================================================ */
.contact-page {
  padding: var(--space-5xl) 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-4xl);
}

.contact-info h2 {
  margin-bottom: var(--space-lg);
}

.contact-methods {
  list-style: none;
  margin-top: var(--space-2xl);
}

.contact-methods li {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.contact-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(200, 168, 78, 0.1);
  border-radius: var(--radius-sm);
  color: var(--color-gold-400);
}

.contact-method-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gray-400);
}

.contact-method-value {
  color: var(--color-navy-900);
  font-weight: 500;
}

/* Form */
.contact-form {
  background: var(--color-white);
  padding: var(--space-3xl);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-navy-900);
  margin-bottom: var(--space-xs);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-navy-900);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-gold-400);
  box-shadow: 0 0 0 3px rgba(200, 168, 78, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.form-group input.error,
.form-group textarea.error {
  border-color: var(--color-error);
}

.form-error {
  font-size: 0.8rem;
  color: var(--color-error);
  margin-top: var(--space-xs);
  display: none;
}

.form-error.visible {
  display: block;
}

.form-success {
  display: none;
  padding: var(--space-xl);
  text-align: center;
  background: rgba(59, 135, 91, 0.08);
  border: 1px solid var(--color-success);
  border-radius: var(--radius-md);
}

.form-success.visible {
  display: block;
}

.form-success h3 {
  color: var(--color-success);
  margin-bottom: var(--space-sm);
}

/* ============================================================
   19. Mobile Navigation (Fullscreen Overlay)
   ============================================================ */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(10, 22, 40, 0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3xl);
}

.mobile-nav.active {
  display: flex;
}

.mobile-nav a {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--color-gold-400);
}

.mobile-nav .btn-primary {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  margin-top: var(--space-lg);
}

/* ============================================================
   20. Animations
   ============================================================ */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ============================================================
   21. Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .about-snippet {
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
  }

  .about-accent-box {
    display: none;
  }

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

  .about-detailed-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  :root {
    --header-height: 68px;
  }

  .main-nav { display: none; }
  .mobile-toggle { display: flex; }

  .hero h1 { font-size: clamp(2rem, 6vw, 2.5rem); }
  .hero-subtitle { font-size: 1rem; }
  .hero-actions { flex-direction: column; align-items: flex-start; }

  .expertise-grid { grid-template-columns: 1fr; }
  .region-grid { grid-template-columns: 1fr; }
  .insight-grid { grid-template-columns: 1fr; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr; }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .contact-form {
    padding: var(--space-xl);
  }

  .about-credentials {
    flex-direction: column;
    gap: var(--space-lg);
  }

  section {
    padding: var(--space-3xl) 0;
  }
}

@media (max-width: 480px) {
  .container,
  .container-narrow {
    padding: 0 var(--space-md);
  }

  .hero {
    min-height: 90vh;
  }

  .hero-actions .btn-primary,
  .hero-actions .btn-primary-outline {
    width: 100%;
    justify-content: center;
  }
}

/* ============================================================
   22. Print Styles
   ============================================================ */
@media print {
  .site-header,
  .site-footer,
  .mobile-toggle,
  .mobile-nav,
  .hero-scroll-indicator,
  .cta-banner { display: none; }

  body {
    color: #000;
    background: #fff;
  }

  .hero {
    min-height: auto;
    background: #fff;
    padding: 2rem 0;
  }

  .hero h1 { color: #000; }
  .hero-subtitle { color: #333; }
}

/* ============================================================
   ARTICLE DETAIL PAGE
   ============================================================ */
.article-body {
  max-width: 780px;
  margin: 0 auto;
  padding: var(--space-3xl) 0 var(--space-5xl);
}
.article-body p {
  font-size: 1.08rem;
  line-height: 1.82;
  margin-bottom: var(--space-lg);
  color: var(--color-navy-800);
}
.article-body h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--color-navy-900);
  margin: var(--space-3xl) 0 var(--space-md);
}
.article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-gray-200);
}
.article-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-gold-400);
  text-decoration: none;
  margin-top: var(--space-3xl);
}
.article-back:hover {
  color: var(--color-gold-300);
}
/* Breadcrumb styling */
.breadcrumb {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--color-gray-300);
  margin-bottom: var(--space-xl);
}
.breadcrumb a {
  color: var(--color-gold-400);
  text-decoration: none;
}
.breadcrumb a:hover {
  color: var(--color-gold-300);
}
.breadcrumb span {
  margin: 0 var(--space-xs);
}