:root {
  --brand-primary: #1a3a5c;
  --brand-secondary: #2b6cb0;
  --brand-accent: #f0c040;
  --brand-accent-soft: rgba(240, 192, 64, 0.15);
  --bg-body: #f4f7fb;
  --bg-surface: #ffffff;
  --bg-surface-alt: #eef3f9;
  --bg-elevated: rgba(255, 255, 255, 0.72);
  --bg-glass: rgba(255, 255, 255, 0.55);
  --text-primary: #1a2433;
  --text-secondary: #46566b;
  --text-muted: #6b7c92;
  --text-inverse: #ffffff;
  --border-color: rgba(26, 58, 92, 0.12);
  --border-strong: rgba(26, 58, 92, 0.22);
  --shadow-sm: 0 2px 8px rgba(20, 40, 70, 0.06);
  --shadow-md: 0 8px 24px rgba(20, 40, 70, 0.08);
  --shadow-lg: 0 18px 48px rgba(20, 40, 70, 0.12);
  --shadow-glow: 0 0 0 4px rgba(240, 192, 64, 0.18);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 30px;
  --radius-pill: 999px;
  --header-height: 68px;
  --max-width: 1200px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

html[data-theme="dark"] {
  --brand-primary: #0f2438;
  --brand-secondary: #3d7fc4;
  --brand-accent: #f5cf5c;
  --brand-accent-soft: rgba(245, 207, 92, 0.16);
  --bg-body: #0b1420;
  --bg-surface: #121e2e;
  --bg-surface-alt: #16273a;
  --bg-elevated: rgba(24, 40, 60, 0.78);
  --bg-glass: rgba(24, 40, 60, 0.55);
  --text-primary: #e8eef6;
  --text-secondary: #b0c0d4;
  --text-muted: #7e91a8;
  --text-inverse: #0b1420;
  --border-color: rgba(160, 190, 220, 0.14);
  --border-strong: rgba(160, 190, 220, 0.26);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 0 4px rgba(245, 207, 92, 0.2);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-height) + 16px);
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
  background-color: var(--bg-body);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(43, 108, 176, 0.08), transparent 42%),
    radial-gradient(circle at 88% 4%, rgba(240, 192, 64, 0.07), transparent 38%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
}

img,
svg {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
}

a {
  color: var(--brand-secondary);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--brand-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 1.6em 0 0.6em;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 3.2vw, 2rem); }
h3 { font-size: clamp(1.15rem, 2.4vw, 1.4rem); }
h4 { font-size: clamp(1.05rem, 2vw, 1.2rem); }

p {
  margin: 0 0 1.1em;
  color: var(--text-secondary);
}

ul,
ol {
  padding-left: 1.4em;
  margin: 0 0 1.2em;
  color: var(--text-secondary);
}

li {
  margin-bottom: 0.5em;
}

li::marker {
  color: var(--brand-secondary);
}

strong {
  color: var(--text-primary);
  font-weight: 700;
}

blockquote {
  margin: 1.2em 0;
  padding: 1em 1.4em;
  border-left: 4px solid var(--brand-accent);
  background: var(--bg-surface-alt);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-secondary);
  font-style: normal;
}

blockquote p {
  margin: 0;
}

time {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

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

/* ============ Header ============ */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid transparent;
  transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

#site-header.is-scrolled {
  background: var(--bg-elevated);
  border-bottom-color: var(--border-color);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand svg {
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base);
}

.brand:hover svg {
  transform: rotate(-6deg) scale(1.06);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-name {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

.brand-slogan {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

#main-nav {
  flex: 1 1 auto;
  min-width: 0;
}

#main-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
}

#main-nav li {
  margin: 0;
}

#main-nav a {
  display: block;
  padding: 8px 12px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

#main-nav a:hover {
  color: var(--brand-primary);
  background: var(--brand-accent-soft);
  transform: translateY(-1px);
}

html[data-theme="dark"] #main-nav a:hover {
  color: var(--brand-accent);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

#site-search {
  display: flex;
  align-items: center;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#site-search:focus-within {
  border-color: var(--brand-secondary);
  box-shadow: var(--shadow-glow);
}

#search-input {
  border: none;
  background: transparent;
  padding: 8px 14px;
  font-size: 0.85rem;
  font-family: inherit;
  color: var(--text-primary);
  width: 150px;
  min-width: 0;
  outline: none;
}

#search-input::placeholder {
  color: var(--text-muted);
}

#site-search button {
  border: none;
  background: var(--brand-primary);
  color: var(--text-inverse);
  padding: 8px 14px;
  font-size: 0.82rem;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
}

#site-search button:hover {
  background: var(--brand-secondary);
}

#theme-toggle,
#menu-toggle {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-primary);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
}

#theme-toggle:hover,
#menu-toggle:hover {
  transform: translateY(-2px) rotate(8deg);
  border-color: var(--brand-accent);
  background: var(--brand-accent-soft);
}

#menu-toggle {
  display: none;
}

/* ============ Main ============ */
#main-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px 60px;
}

section {
  margin: 48px 0;
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

section.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

.section-title {
  position: relative;
  margin: 0 0 28px;
  padding-left: 18px;
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  font-weight: 800;
  color: var(--text-primary);
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 6px;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--brand-accent), var(--brand-secondary));
}

/* ============ Banner ============ */
.banner {
  position: relative;
  margin: 24px 0 40px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--brand-primary);
}

.banner-slides {
  position: relative;
  min-height: 340px;
}

.banner-slide {
  position: absolute;
  inset: 0;
  margin: 0;
  opacity: 0;
  visibility: hidden;
  transform: scale(1.03);
  transition: opacity var(--transition-slow), transform var(--transition-slow), visibility var(--transition-slow);
  display: flex;
  align-items: center;
}

.banner-slide.is-active {
  position: relative;
  opacity: 1;
  visibility: visible;
  transform: scale(1);
}

.banner-slide > svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.banner-copy {
  position: relative;
  z-index: 2;
  max-width: 620px;
  padding: 56px clamp(24px, 5vw, 64px);
  color: #ffffff;
}

.banner-copy h2 {
  margin: 0 0 14px;
  font-size: clamp(1.5rem, 4vw, 2.3rem);
  font-weight: 800;
  color: #ffffff;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.35);
}

.banner-copy p {
  margin: 0 0 26px;
  font-size: clamp(0.92rem, 1.8vw, 1.05rem);
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.9);
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.3);
}

.btn-primary {
  display: inline-block;
  padding: 12px 30px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--brand-primary);
  background: linear-gradient(135deg, var(--brand-accent), #ffd970);
  border-radius: var(--radius-pill);
  box-shadow: 0 8px 22px rgba(240, 192, 64, 0.4);
  transition: transform var(--transition-base), box-shadow var(--transition-base), filter var(--transition-base);
}

.btn-primary:hover {
  color: var(--brand-primary);
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 14px 32px rgba(240, 192, 64, 0.55);
  filter: brightness(1.05);
}

.btn-primary:active {
  transform: translateY(-1px) scale(0.99);
}

.banner-nav {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 5;
}

.banner-nav button {
  width: 34px;
  height: 6px;
  border: none;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  padding: 0;
  transition: width var(--transition-base), background var(--transition-base);
}

.banner-nav button[aria-selected="true"] {
  width: 48px;
  background: var(--brand-accent);
  box-shadow: 0 0 12px rgba(240, 192, 64, 0.7);
}

.banner-nav button:hover {
  background: rgba(255, 255, 255, 0.75);
}

/* ============ Breadcrumb ============ */
#breadcrumb {
  margin: 20px 0 0;
  opacity: 1;
  transform: none;
}

#breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

#breadcrumb li {
  margin: 0;
  display: flex;
  align-items: center;
}

#breadcrumb li + li::before {
  content: "›";
  margin-right: 8px;
  color: var(--text-muted);
}

#breadcrumb a {
  color: var(--text-secondary);
}

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

/* ============ Stats ============ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
}

.stat-item {
  position: relative;
  padding: 28px 22px;
  text-align: center;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.stat-item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--brand-accent-soft), transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.stat-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-accent);
}

.stat-item:hover::after {
  opacity: 1;
}

.stat-number {
  display: block;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--brand-secondary);
  font-variant-numeric: tabular-nums;
  background: linear-gradient(135deg, var(--brand-secondary), var(--brand-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  display: block;
  margin-top: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

/* ============ Articles ============ */
.article-card {
  position: relative;
  margin: 0 0 18px;
  padding: 22px 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  opacity: 0;
  transform: translateY(24px);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), opacity var(--transition-slow);
}

.article-card.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-secondary);
}

.article-card h3 {
  margin: 0 0 6px;
  font-size: 1.12rem;
}

.article-card h3 a {
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.article-card h3 a:hover {
  color: var(--brand-secondary);
}

.article-card p {
  margin: 10px 0 12px;
  font-size: 0.92rem;
  line-height: 1.75;
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--brand-secondary);
}

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

.read-more:hover::after {
  transform: translateX(5px);
}

/* ============ News ============ */
.news-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

.news-list li {
  margin: 0;
  padding: 22px 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.news-list li:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-accent);
}

.news-list h3 {
  margin: 8px 0 8px;
  font-size: 1.05rem;
  line-height: 1.5;
}

.news-list p {
  margin: 0;
  font-size: 0.9rem;
}

/* ============ FAQ ============ */
.faq-item {
  margin: 0 0 12px;
  padding: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

.faq-item:hover {
  border-color: var(--brand-secondary);
  box-shadow: var(--shadow-md);
}

.faq-item[open] {
  border-color: var(--brand-accent);
  box-shadow: var(--shadow-md);
}

.faq-item summary {
  position: relative;
  padding: 16px 48px 16px 20px;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  font-weight: 400;
  line-height: 1;
  color: var(--brand-secondary);
  transition: transform var(--transition-base), color var(--transition-base);
}

.faq-item[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
  color: var(--brand-accent);
}

.faq-item summary:hover {
  background: var(--brand-accent-soft);
}

.faq-item p {
  margin: 0;
  padding: 0 20px 18px;
  font-size: 0.92rem;
  line-height: 1.8;
  animation: faqFade 0.35s ease;
}

@keyframes faqFade {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============ Contact ============ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.contact-item {
  padding: 22px 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.contact-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-secondary);
}

.contact-item h3 {
  margin: 0 0 8px;
  font-size: 0.95rem;
  color: var(--brand-secondary);
  letter-spacing: 0.04em;
}

.contact-item p {
  margin: 0;
  font-size: 0.92rem;
}

/* ============ Sitemap ============ */
.sitemap-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}

.sitemap-list li {
  margin: 0;
}

.sitemap-list a {
  display: block;
  padding: 12px 18px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: transform var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.sitemap-list a:hover {
  transform: translateX(6px);
  color: var(--brand-primary);
  background: var(--brand-accent-soft);
  border-color: var(--brand-accent);
}

html[data-theme="dark"] .sitemap-list a:hover {
  color: var(--brand-accent);
}

/* ============ Footer ============ */
#site-footer {
  margin-top: 40px;
  padding: 48px 0 28px;
  background: linear-gradient(160deg, var(--brand-primary), #0f2438);
  color: rgba(255, 255, 255, 0.82);
  border-top: 3px solid var(--brand-accent);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.footer-brand svg {
  border-radius: 10px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

.footer-brand p {
  margin: 0;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.7;
}

#site-footer h3 {
  margin: 0 0 14px;
  font-size: 0.95rem;
  color: var(--brand-accent);
  letter-spacing: 0.05em;
}

#site-footer nav ul,
.footer-links ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

#site-footer nav li,
.footer-links li {
  margin: 0 0 8px;
}

#site-footer a {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.9rem;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

#site-footer a:hover {
  color: var(--brand-accent);
  padding-left: 5px;
}

.footer-meta p {
  margin: 0 0 8px;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
}

/* ============ Back to top ============ */
#back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 900;
  width: 46px;
  height: 46px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-secondary), var(--brand-primary));
  color: #ffffff;
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.85);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base), box-shadow var(--transition-base);
}

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

#back-to-top:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 0 0 6px var(--brand-accent-soft), var(--shadow-lg);
}

#back-to-top:active {
  transform: translateY(-1px) scale(0.98);
}

/* ============ Lazy SVG ============ */
.lazy-svg {
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.lazy-svg.is-loaded {
  opacity: 1;
}

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  #search-input {
    width: 120px;
  }

  #main-nav a {
    padding: 8px 10px;
    font-size: 0.84rem;
  }
}

@media (max-width: 860px) {
  :root {
    --header-height: 60px;
  }

  .header-inner {
    gap: 12px;
    padding: 0 16px;
  }

  #menu-toggle {
    display: inline-flex;
  }

  #main-nav {
    flex-basis: 100%;
    order: 3;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height var(--transition-base), opacity var(--transition-base), margin var(--transition-base);
  }

  #main-nav.nav-open {
    max-height: 520px;
    opacity: 1;
    margin-bottom: 12px;
  }

  #main-nav ul {
    flex-direction: column;
    gap: 4px;
    padding: 8px 0;
  }

  #main-nav a {
    padding: 10px 14px;
    border-radius: var(--radius-md);
    font-size: 0.92rem;
  }

  #site-search {
    flex: 1 1 auto;
  }

  #search-input {
    width: 100%;
  }

  .banner-slides {
    min-height: 380px;
  }

  .banner-copy {
    padding: 40px 24px 56px;
    max-width: 100%;
  }

  .banner-copy h2 {
    font-size: 1.5rem;
  }

  section {
    margin: 36px 0;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 26px;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
  }

  #main-content {
    padding: 0 14px 44px;
  }

  .header-inner {
    padding: 0 12px;
  }

  .brand-slogan {
    display: none;
  }

  .brand-name {
    font-size: 1.05rem;
  }

  .banner {
    border-radius: var(--radius-lg);
  }

  .banner-slides {
    min-height: 420px;
  }

  .banner-copy {
    padding: 34px 18px 60px;
  }

  .banner-copy h2 {
    font-size: 1.28rem;
  }

  .banner-copy p {
    font-size: 0.88rem;
  }

  .btn-primary {
    padding: 11px 24px;
    font-size: 0.9rem;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .stat-item {
    padding: 20px 14px;
  }

  .stat-label {
    font-size: 0.8rem;
  }

  .article-card,
  .news-list li,
  .contact-item {
    padding: 18px 16px;
  }

  .faq-item summary {
    padding: 14px 42px 14px 16px;
    font-size: 0.92rem;
  }

  .faq-item p {
    padding: 0 16px 16px;
    font-size: 0.88rem;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  #back-to-top {
    right: 14px;
    bottom: 14px;
    width: 42px;
    height: 42px;
  }
}

/* ============ Motion preference ============ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  section,
  .article-card {
    opacity: 1;
    transform: none;
  }
}

/* ============ Print ============ */
@media print {
  #site-header,
  #back-to-top,
  .banner-nav,
  #site-footer {
    display: none;
  }

  body {
    background: #ffffff;
    color: #000000;
  }

  section,
  .article-card {
    opacity: 1;
    transform: none;
    box-shadow: none;
    border-color: #cccccc;
  }
}