:root {
  --primary: #e94560;
  --primary-dark: #c73550;
  --primary-light: #ff6b81;
  --secondary: #0f3460;
  --accent: #533483;
  --bg: #f5f6fa;
  --bg-alt: #ffffff;
  --bg-card: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-border: rgba(255, 255, 255, 0.45);
  --text: #1a1a2e;
  --text-secondary: #4a4a5a;
  --text-muted: #8a8a9a;
  --border: rgba(26, 26, 46, 0.1);
  --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
  --shadow: 0 8px 24px rgba(26, 26, 46, 0.1);
  --shadow-lg: 0 16px 48px rgba(26, 26, 46, 0.14);
  --shadow-glow: 0 8px 32px rgba(233, 69, 96, 0.28);
  --radius-sm: 8px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-full: 999px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --header-height: 68px;
  --gradient-hero: linear-gradient(135deg, #1a1a2e 0%, #16213e 35%, #0f3460 65%, #533483 100%);
  --gradient-primary: linear-gradient(135deg, #e94560 0%, #533483 100%);
  --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.9), rgba(255,255,255,0.6));
}

[data-theme="dark"] {
  --primary: #ff6b81;
  --primary-dark: #e94560;
  --primary-light: #ff8fa3;
  --secondary: #1a1a2e;
  --accent: #7b5ea7;
  --bg: #0d0d1a;
  --bg-alt: #14142a;
  --bg-card: #1a1a2e;
  --bg-glass: rgba(26, 26, 46, 0.78);
  --bg-glass-border: rgba(255, 255, 255, 0.08);
  --text: #eaeaf0;
  --text-secondary: #b0b0c0;
  --text-muted: #70708a;
  --border: rgba(255, 255, 255, 0.08);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 8px 32px rgba(255, 107, 129, 0.25);
  --gradient-hero: linear-gradient(135deg, #0d0d1a 0%, #1a1a2e 35%, #16213e 65%, #2d1b4e 100%);
  --gradient-card: linear-gradient(145deg, rgba(26,26,46,0.9), rgba(26,26,46,0.6));
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --primary: #ff6b81;
    --primary-dark: #e94560;
    --primary-light: #ff8fa3;
    --secondary: #1a1a2e;
    --accent: #7b5ea7;
    --bg: #0d0d1a;
    --bg-alt: #14142a;
    --bg-card: #1a1a2e;
    --bg-glass: rgba(26, 26, 46, 0.78);
    --bg-glass-border: rgba(255, 255, 255, 0.08);
    --text: #eaeaf0;
    --text-secondary: #b0b0c0;
    --text-muted: #70708a;
    --border: rgba(255, 255, 255, 0.08);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 8px 32px rgba(255, 107, 129, 0.25);
    --gradient-hero: linear-gradient(135deg, #0d0d1a 0%, #1a1a2e 35%, #16213e 65%, #2d1b4e 100%);
    --gradient-card: linear-gradient(145deg, rgba(26,26,46,0.9), rgba(26,26,46,0.6));
  }
}

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

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

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--text);
}

h1 { font-size: clamp(1.6rem, 4vw, 2.6rem); }
h2 { font-size: clamp(1.35rem, 3vw, 2rem); }
h3 { font-size: clamp(1.1rem, 2.2vw, 1.4rem); }

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

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

time {
  font-size: 0.85rem;
  color: var(--text-muted);
}

blockquote {
  border-left: 4px solid var(--primary);
  padding: 1rem 1.25rem;
  margin: 1rem 0;
  background: var(--bg-glass);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform var(--transition), box-shadow var(--transition);
}

blockquote:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

blockquote p {
  font-style: italic;
  color: var(--text);
  margin-bottom: 0.5rem;
}

blockquote footer {
  font-size: 0.9rem;
  color: var(--primary);
  font-weight: 500;
}

address {
  font-style: normal;
}

.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;
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: var(--primary);
  color: #fff;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-alt);
}

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-alt);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* ===== HEADER ===== */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--bg-glass-border);
  transition: background var(--transition), box-shadow var(--transition), height var(--transition);
}

#site-header.scrolled {
  box-shadow: var(--shadow);
  background: var(--bg-glass);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.logo:hover {
  transform: scale(1.04);
}

.logo svg {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  transition: box-shadow var(--transition);
}

.logo:hover svg {
  box-shadow: var(--shadow-glow);
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
  letter-spacing: 0.5px;
}

#main-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

#main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: nowrap;
}

#main-nav a {
  display: block;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  white-space: nowrap;
  transition: color var(--transition), background var(--transition), transform var(--transition);
}

#main-nav a:hover {
  color: var(--primary);
  background: rgba(233, 69, 96, 0.08);
  transform: translateY(-1px);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

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

#site-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.15);
}

#search-input {
  width: 150px;
  padding: 8px 14px;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 0.875rem;
  font-family: inherit;
  outline: none;
  transition: width var(--transition);
}

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

#search-input:focus {
  width: 200px;
}

#site-search button {
  padding: 8px 16px;
  border: none;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: opacity var(--transition);
}

#site-search button:hover {
  opacity: 0.88;
}

#theme-toggle,
#menu-toggle {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--bg-alt);
  color: var(--text);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

#theme-toggle:hover,
#menu-toggle:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: rotate(12deg) scale(1.08);
  box-shadow: var(--shadow-glow);
}

#menu-toggle {
  display: none;
}

/* ===== MAIN ===== */
main {
  padding-top: var(--header-height);
}

/* ===== HERO ===== */
#hero {
  position: relative;
  padding: 80px 20px 60px;
  background: var(--gradient-hero);
  overflow: hidden;
  isolation: isolate;
}

#hero::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.35) 0%, transparent 70%);
  border-radius: 50%;
  animation: floatBlob 12s ease-in-out infinite;
  z-index: -1;
}

#hero::after {
  content: "";
  position: absolute;
  bottom: -40%;
  right: -15%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(83, 52, 131, 0.45) 0%, transparent 70%);
  border-radius: 50%;
  animation: floatBlob 15s ease-in-out infinite reverse;
  z-index: -1;
}

@keyframes floatBlob {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(40px, -40px) scale(1.1); }
  66% { transform: translate(-30px, 30px) scale(0.95); }
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  color: #fff;
  margin-bottom: 20px;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
  animation: fadeInUp 0.8s ease-out both;
}

.hero-lead {
  color: rgba(255, 255, 255, 0.85);
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  line-height: 1.85;
  max-width: 760px;
  margin: 0 auto 32px;
  animation: fadeInUp 0.8s ease-out 0.15s both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.3s both;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 36px;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  border: none;
  box-shadow: var(--shadow-glow);
}

.btn-primary::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(255,255,255,0.35) 50%, transparent 70%);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 12px 40px rgba(233, 69, 96, 0.45);
  color: #fff;
}

.btn-primary:hover::after {
  transform: translateX(100%);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.22);
  transform: translateY(-3px) scale(1.03);
  color: #fff;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
}

.hero-stats {
  max-width: 1000px;
  margin: 56px auto 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  position: relative;
  z-index: 1;
  animation: fadeInUp 0.8s ease-out 0.45s both;
}

.stat-item {
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  padding: 24px 12px;
  text-align: center;
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.stat-item:hover {
  transform: translateY(-6px);
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(233, 69, 96, 0.5);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
}

.stat-number {
  display: block;
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 800;
  background: linear-gradient(135deg, #fff, #ffb3c1);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.stat-label {
  display: block;
  margin-top: 6px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.72);
  letter-spacing: 0.5px;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== BREADCRUMB ===== */
#breadcrumb {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 20px 0;
}

#breadcrumb ol {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

#breadcrumb li:not(:last-child)::after {
  content: "›";
  margin-left: 8px;
  color: var(--text-muted);
}

#breadcrumb a {
  color: var(--text-secondary);
  font-weight: 500;
}

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

#breadcrumb [aria-current="page"] {
  color: var(--primary);
  font-weight: 600;
}

/* ===== ANCHOR NAV ===== */
#anchor-nav {
  max-width: 1280px;
  margin: 20px auto 0;
  padding: 0 20px;
}

#anchor-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 16px;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

#anchor-nav a {
  display: inline-block;
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  transition: all var(--transition);
}

#anchor-nav a:hover {
  color: #fff;
  background: var(--gradient-primary);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* ===== SECTIONS ===== */
main > section:not(#hero):not(#breadcrumb):not(#anchor-nav) {
  max-width: 1280px;
  margin: 0 auto;
  padding: 48px 20px;
}

main > section > h2 {
  position: relative;
  padding-left: 20px;
  margin-bottom: 28px;
  letter-spacing: 0.5px;
}

main > section > h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 70%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
}

main > section > article {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 4vw, 40px);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

main > section > article:hover {
  box-shadow: var(--shadow);
  border-color: rgba(233, 69, 96, 0.25);
}

main > section > article h3 {
  margin: 1.75rem 0 0.75rem;
  color: var(--text);
  position: relative;
  padding-left: 16px;
}

main > section > article h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.35em;
  width: 8px;
  height: 8px;
  background: var(--gradient-primary);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(233, 69, 96, 0.12);
}

main > section > article h3:first-child {
  margin-top: 0;
}

main > section > article ul,
main > section > article ol {
  margin: 0.75rem 0 1.25rem;
  padding-left: 0;
}

main > section > article ul li,
main > section > article ol li {
  position: relative;
  padding: 8px 0 8px 28px;
  color: var(--text-secondary);
  line-height: 1.7;
  transition: color var(--transition), transform var(--transition);
}

main > section > article ul li::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 1.05em;
  width: 8px;
  height: 8px;
  background: var(--gradient-primary);
  border-radius: 50%;
  transition: transform var(--transition);
}

main > section > article ul li:hover {
  color: var(--text);
  transform: translateX(4px);
}

main > section > article ul li:hover::before {
  transform: scale(1.4);
}

main > section > article ol {
  counter-reset: step;
}

main > section > article ol li {
  counter-increment: step;
}

main > section > article ol li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  border-radius: 50%;
}

main > section > article ol li:hover {
  color: var(--text);
  transform: translateX(4px);
}

/* ===== ARTICLES ===== */
#articles > article {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px 28px;
  margin-bottom: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

#articles > article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--gradient-primary);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--transition);
}

#articles > article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(233, 69, 96, 0.3);
}

#articles > article:hover::before {
  transform: scaleY(1);
}

#articles > article h3 {
  margin: 0;
  padding-left: 0;
  font-size: 1.15rem;
  transition: color var(--transition);
}

#articles > article h3::before {
  display: none;
}

#articles > article:hover h3 {
  color: var(--primary);
}

#articles > article p {
  margin: 0;
  font-size: 0.925rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

#articles > article a {
  align-self: flex-start;
  margin-top: 4px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition), color var(--transition);
}

#articles > article a::after {
  content: "→";
  transition: transform var(--transition);
}

#articles > article a:hover {
  gap: 8px;
  color: var(--primary-light);
}

#articles > article a:hover::after {
  transform: translateX(3px);
}

/* ===== FAQ ===== */
#faq details {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}

#faq details:hover {
  border-color: rgba(233, 69, 96, 0.3);
  box-shadow: var(--shadow-sm);
}

#faq details[open] {
  border-color: rgba(233, 69, 96, 0.4);
  box-shadow: var(--shadow);
}

#faq summary {
  padding: 18px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: background var(--transition), color var(--transition);
  position: relative;
}

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

#faq summary::after {
  content: "+";
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 50%;
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--primary);
  transition: transform var(--transition), background var(--transition), color var(--transition);
}

#faq details[open] summary::after {
  content: "−";
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
  transform: rotate(180deg);
}

#faq summary:hover {
  background: rgba(233, 69, 96, 0.05);
  color: var(--primary);
}

#faq details p {
  padding: 0 24px 20px;
  margin: 0;
  font-size: 0.925rem;
  line-height: 1.8;
  color: var(--text-secondary);
  animation: fadeIn 0.35s ease;
}

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

/* ===== SITEMAP & FRIEND LINKS ===== */
#sitemap nav ul,
#friend-links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

#sitemap nav a,
#friend-links a {
  display: inline-block;
  padding: 8px 18px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  transition: all var(--transition);
}

#sitemap nav a:hover,
#friend-links a:hover {
  color: #fff;
  background: var(--gradient-primary);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* ===== FOOTER ===== */
#site-footer {
  margin-top: 40px;
  background: linear-gradient(160deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  color: rgba(255, 255, 255, 0.8);
  padding: 56px 20px 32px;
  position: relative;
  overflow: hidden;
}

#site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
}

.footer-content {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
}

.footer-content section h2 {
  font-size: 1.05rem;
  color: #fff;
  margin-bottom: 14px;
  padding-left: 0;
  position: relative;
  display: inline-block;
}

.footer-content section h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 32px;
  height: 3px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
}

.footer-content section p {
  font-size: 0.85rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 10px;
}

.footer-content section a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition);
}

.footer-content section a:hover {
  color: var(--primary-light);
}

.footer-content address p {
  margin-bottom: 8px;
}

.footer-content time {
  color: rgba(255, 255, 255, 0.55);
}

/* ===== BACK TO TOP ===== */
#back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 999;
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 1.3rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.8);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition), box-shadow var(--transition);
}

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

#back-to-top:hover {
  transform: translateY(-4px) scale(1.1);
  box-shadow: 0 12px 40px rgba(233, 69, 96, 0.5);
}

/* ===== SCROLL ANIMATION ===== */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  #main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--bg-glass-border);
    box-shadow: var(--shadow-lg);
    padding: 12px 20px;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
  }

  #main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  #main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  #main-nav a {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
  }

  #menu-toggle {
    display: flex;
  }

  #search-input {
    width: 120px;
  }

  #search-input:focus {
    width: 160px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  .header-inner {
    padding: 0 14px;
    gap: 10px;
  }

  .logo-text {
    font-size: 1.05rem;
  }

  .logo svg {
    width: 34px;
    height: 34px;
  }

  #site-search {
    display: none;
  }

  #hero {
    padding: 56px 16px 44px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 40px;
  }

  .stat-item {
    padding: 18px 10px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
  }

  #breadcrumb,
  #anchor-nav {
    padding-left: 14px;
    padding-right: 14px;
  }

  main > section:not(#hero):not(#breadcrumb):not(#anchor-nav) {
    padding: 36px 14px;
  }

  main > section > article {
    padding: 20px 18px;
  }

  #articles > article {
    padding: 20px;
  }

  #faq summary {
    padding: 16px 18px;
    font-size: 0.95rem;
  }

  #faq details p {
    padding: 0 18px 18px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  #site-footer {
    padding: 40px 16px 28px;
  }

  #back-to-top {
    right: 16px;
    bottom: 16px;
    width: 42px;
    height: 42px;
  }
}

@media (max-width: 480px) {
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-number {
    font-size: 1.4rem;
  }

  .stat-label {
    font-size: 0.75rem;
  }

  #anchor-nav ul {
    padding: 10px 12px;
  }

  #anchor-nav a {
    font-size: 0.78rem;
    padding: 5px 11px;
  }

  blockquote {
    padding: 14px 16px;
  }
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ===== PRINT ===== */
@media print {
  #site-header,
  #anchor-nav,
  #back-to-top,
  #theme-toggle,
  #menu-toggle,
  #site-search {
    display: none !important;
  }

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

  main {
    padding-top: 0;
  }

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

  .hero-content h1,
  .hero-lead {
    color: #000;
    text-shadow: none;
  }
}