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

:root {
  /* Palette */
  --clr-primary-red: #E63946;
  --clr-primary-orange: #F4A261;
  --clr-secondary-blue-gray: #457B9D;
  --clr-bg-light: #F1FAEE;
  --clr-bg-dark: #1D3557;
  --clr-accent-highlight: #E9C46A;
  --clr-text-primary: #1D3557;
  --clr-text-secondary: #457B9D;
  --clr-border-grid: #A8DADC;

  /* Typography */
  --font-heading: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-number: 'Consolas', 'Courier New', monospace;
  --heading-weight: 900;
  --heading-size-large: 3rem;
  --heading-size-small: 1.5rem;
  --body-size: 1rem;
  --line-height: 1.6;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;

  /* Layout */
  --content-max: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;

  /* Grid overlay */
  --grid-color: rgba(168, 218, 220, 0.12);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

body {
  font-family: var(--font-body);
  font-size: var(--body-size);
  line-height: var(--line-height);
  color: var(--clr-text-primary);
  background-color: var(--clr-bg-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--clr-primary-red);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--clr-primary-orange);
}
a:focus-visible {
  outline: 3px solid var(--clr-primary-orange);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

ul, ol {
  list-style: none;
}

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

input, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* ===== Skip Link ===== */
.skip-link {
  position: absolute;
  top: -1000px;
  left: 0;
  z-index: 9999;
  padding: var(--space-sm) var(--space-md);
  background: var(--clr-primary-red);
  color: #fff;
  font-weight: 700;
  border-radius: 0 0 var(--radius-md) 0;
  transition: top var(--transition-fast);
}
.skip-link:focus {
  top: 0;
}

/* ===== Content Container ===== */
.content-container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
  padding: var(--space-md) 0;
  font-size: 0.875rem;
  color: var(--clr-text-secondary);
}
.breadcrumb a {
  color: var(--clr-text-secondary);
}
.breadcrumb a:hover {
  color: var(--clr-primary-red);
}
.breadcrumb .separator {
  color: var(--clr-border-grid);
  margin: 0 var(--space-xs);
}

/* ===== Base Button ===== */
.btn-base {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 0.9375rem;
  line-height: 1.4;
  transition: background var(--transition-base), transform var(--transition-fast), box-shadow var(--transition-base);
  text-decoration: none;
}
.btn-base:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
.btn-base:focus-visible {
  outline: 3px solid var(--clr-primary-orange);
  outline-offset: 2px;
}

/* ===== Section Label ===== */
.section-label {
  display: inline-block;
  font-family: var(--font-number);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--clr-primary-red);
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
  border-left: 3px solid var(--clr-primary-red);
  padding-left: var(--space-sm);
}

/* ===== Grid Background ===== */
.grid-bg {
  background-image:
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px),
    linear-gradient(0deg, var(--grid-color) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* ===== Header ===== */
.site-header {
  background-color: var(--clr-bg-dark);
  color: #fff;
  position: relative;
  z-index: 100;
  border-bottom: 4px solid transparent;
  background-image: linear-gradient(90deg, var(--clr-primary-red), var(--clr-primary-orange), transparent 80%);
  background-repeat: no-repeat;
  background-size: 100% 4px;
  background-position: bottom;
}

.header-grid {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.header-primary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
  gap: var(--space-lg);
  position: relative;
}

/* Brand */
.brand-group {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-shrink: 1;
  min-width: 0;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: #fff;
  text-decoration: none;
  flex-shrink: 0;
}
.brand-link:hover {
  color: var(--clr-primary-orange);
}
.brand-svg {
  width: 2.5rem;
  height: 2.5rem;
  flex-shrink: 0;
}
.brand-name {
  font-family: var(--font-heading);
  font-weight: var(--heading-weight);
  font-size: 1.375rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.brand-tagline {
  font-size: 0.8125rem;
  color: var(--clr-border-grid);
  letter-spacing: 0.04em;
  border-left: 1px solid rgba(255,255,255,0.2);
  padding-left: var(--space-md);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Tools */
.header-tools {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-shrink: 0;
}

.search-wrap {
  position: relative;
}
.search-input {
  width: 180px;
  padding: 0.5rem 1rem 0.5rem 2.25rem;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.08);
  color: #fff;
  font-size: 0.875rem;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}
.search-input::placeholder {
  color: rgba(255,255,255,0.5);
}
.search-input:focus {
  outline: none;
  border-color: var(--clr-primary-orange);
  background: rgba(255,255,255,0.14);
}
.search-input:focus-visible {
  outline: 2px solid var(--clr-primary-orange);
  outline-offset: 2px;
}
.search-wrap::before {
  content: '';
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1rem;
  height: 1rem;
  border: 2px solid rgba(255,255,255,0.4);
  border-radius: 50%;
  pointer-events: none;
}
.search-wrap::after {
  content: '';
  position: absolute;
  left: 1.55rem;
  top: 50%;
  transform: translateY(2px) rotate(45deg);
  width: 2px;
  height: 0.5rem;
  background: rgba(255,255,255,0.4);
  pointer-events: none;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.25rem;
  background: var(--clr-primary-orange);
  color: var(--clr-bg-dark);
  border-radius: var(--radius-md);
  font-weight: 800;
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
}
.btn-cta:hover {
  background: #fdb47a;
  color: var(--clr-bg-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(244,162,97,0.35);
}
.btn-cta:focus-visible {
  outline: 3px solid var(--clr-primary-orange);
  outline-offset: 2px;
}

/* Nav Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 2.5rem;
  height: 2.5rem;
  gap: 5px;
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}
.nav-toggle:hover {
  background: rgba(255,255,255,0.1);
}
.nav-toggle:focus-visible {
  outline: 3px solid var(--clr-primary-orange);
  outline-offset: 2px;
}
.nav-toggle .bar {
  display: block;
  width: 24px;
  height: 2.5px;
  background: #fff;
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}
.nav-toggle[aria-expanded="true"] .bar:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .bar:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* Primary Nav */
.primary-nav {
  padding: 0 0 var(--space-sm) 0;
}
.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: var(--space-sm);
}
.nav-list li {
  position: relative;
}
.nav-list li a {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.5rem 1.25rem;
  color: rgba(255,255,255,0.8);
  font-size: 0.90625rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
  text-decoration: none;
  position: relative;
}
.nav-list li a:hover {
  color: #fff;
  background: rgba(230,57,70,0.2);
}
.nav-list li a:focus-visible {
  outline: 3px solid var(--clr-primary-orange);
  outline-offset: 2px;
}
.nav-list li a[aria-current="page"] {
  color: var(--clr-primary-orange);
}
.nav-list li a[aria-current="page"]::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 1.25rem;
  right: 1.25rem;
  height: 2px;
  background: var(--clr-primary-orange);
  border-radius: 1px;
}
.nav-index {
  font-family: var(--font-number);
  font-size: 0.6875rem;
  color: var(--clr-primary-red);
  font-weight: 400;
  letter-spacing: 0.02em;
  opacity: 0.7;
}

/* ===== Responsive Header ===== */
@media (max-width: 1024px) {
  .search-input {
    width: 140px;
  }
  .nav-list li a {
    padding: 0.4rem 0.875rem;
    font-size: 0.84375rem;
  }
}

@media (max-width: 820px) {
  .brand-tagline {
    display: none;
  }
  .search-input {
    width: 120px;
  }
  .nav-list {
    gap: 0;
  }
  .nav-list li a {
    padding: 0.35rem 0.75rem;
    font-size: 0.8125rem;
  }
}

@media (max-width: 640px) {
  .header-primary {
    flex-wrap: wrap;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
  }
  .brand-group {
    flex: 1;
    min-width: 0;
  }
  .brand-svg {
    width: 2rem;
    height: 2rem;
  }
  .brand-name {
    font-size: 1.125rem;
  }
  .header-tools {
    gap: var(--space-sm);
  }
  .search-wrap {
    display: none;
  }
  .btn-cta {
    padding: 0.4rem 0.875rem;
    font-size: 0.8125rem;
  }
  .nav-toggle {
    display: flex;
  }
  .primary-nav {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding: 0;
    border-top: none;
  }
  .primary-nav[data-open] {
    max-height: 400px;
    padding: var(--space-sm) 0 var(--space-md) 0;
    border-top: 1px solid rgba(255,255,255,0.08);
  }
  .nav-list {
    flex-direction: column;
    border-top: none;
    padding-top: 0;
    gap: 2px;
  }
  .nav-list li a {
    padding: 0.625rem var(--space-md);
    font-size: 0.9375rem;
    border-radius: 0;
  }
  .nav-list li a[aria-current="page"]::after {
    left: var(--space-md);
    right: var(--space-md);
    bottom: 0;
  }
  .header-grid {
    padding: 0 var(--space-md);
  }
}

@media (max-width: 380px) {
  .brand-name {
    font-size: 1rem;
  }
  .btn-cta {
    padding: 0.35rem 0.7rem;
    font-size: 0.75rem;
  }
}

/* ===== Footer ===== */
.site-footer {
  background-color: var(--clr-bg-dark);
  color: rgba(255,255,255,0.85);
  position: relative;
  border-top: 4px solid transparent;
  background-image: linear-gradient(90deg, transparent 20%, var(--clr-primary-red), var(--clr-primary-orange));
  background-repeat: no-repeat;
  background-size: 100% 4px;
  background-position: top;
  padding: var(--space-xl) 0 var(--space-lg);
}

.footer-grid {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: grid;
  grid-template-columns: 1fr 1.5fr 1fr;
  gap: var(--space-xl);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.footer-svg {
  width: 2.25rem;
  height: 2.25rem;
  margin-bottom: var(--space-xs);
}
.footer-brand-name {
  font-family: var(--font-heading);
  font-weight: var(--heading-weight);
  font-size: 1.25rem;
  color: #fff;
  letter-spacing: 0.02em;
}
.footer-tagline {
  font-size: 0.8125rem;
  color: var(--clr-border-grid);
  margin-top: var(--space-xs);
}

.footer-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.contact-item {
  font-size: 0.875rem;
  line-height: 1.5;
}
.contact-item a {
  color: var(--clr-border-grid);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.contact-item a:hover {
  color: var(--clr-primary-orange);
}
.contact-item a:focus-visible {
  outline: 2px solid var(--clr-primary-orange);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
}
.footer-link {
  font-size: 0.875rem;
  color: var(--clr-border-grid);
  text-decoration: none;
  padding: var(--space-xs) 0;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}
.footer-link:hover {
  color: var(--clr-primary-orange);
  border-bottom-color: var(--clr-primary-orange);
}
.footer-link:focus-visible {
  outline: 2px solid var(--clr-primary-orange);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.footer-legal {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.55);
}
.footer-legal .copyright {
  color: rgba(255,255,255,0.7);
}
.footer-legal .icp {
  font-family: var(--font-number);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
}

.trust-statement {
  margin-top: var(--space-md);
  padding: var(--space-md);
  background: rgba(230,57,70,0.1);
  border-left: 3px solid var(--clr-primary-red);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: rgba(255,255,255,0.7);
  grid-column: 1 / -1;
}

/* ===== Responsive Footer ===== */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1.2fr 1fr;
    gap: var(--space-lg);
  }
}

@media (max-width: 820px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
  }
  .footer-legal {
    grid-column: 1 / -1;
  }
  .trust-statement {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .site-footer {
    padding: var(--space-lg) 0 var(--space-md);
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    padding: 0 var(--space-md);
  }
  .footer-brand {
    align-items: flex-start;
  }
  .footer-info {
    gap: var(--space-md);
  }
  .footer-links {
    gap: var(--space-sm);
  }
  .footer-link {
    font-size: 0.8125rem;
  }
  .trust-statement {
    font-size: 0.75rem;
    padding: var(--space-sm) var(--space-md);
  }
}

/* ===== Responsive Images ===== */
.img-responsive {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.img-container {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--clr-border-grid);
}
.img-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}
.img-container:hover img {
  transform: scale(1.02);
}

/* ===== Utility ===== */
.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;
}

/* ===== Focus Visible Global ===== */
:focus-visible {
  outline: 3px solid var(--clr-primary-orange);
  outline-offset: 2px;
}

/* ===== Selection ===== */
::selection {
  background: var(--clr-primary-red);
  color: #fff;
}

/* ===== Scrollbar (optional refinement) ===== */
@media (min-width: 640px) {
  ::-webkit-scrollbar {
    width: 8px;
  }
  ::-webkit-scrollbar-track {
    background: var(--clr-bg-dark);
  }
  ::-webkit-scrollbar-thumb {
    background: var(--clr-secondary-blue-gray);
    border-radius: 4px;
  }
  ::-webkit-scrollbar-thumb:hover {
    background: var(--clr-primary-red);
  }
}

/* ===== Print ===== */
@media print {
  .site-header,
  .site-footer,
  .nav-toggle,
  .search-wrap,
  .btn-cta {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  .content-container {
    max-width: 100%;
    padding: 0;
  }
}