:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16162a;
  --bg-card: rgba(30, 30, 52, 0.72);
  --bg-card-hover: rgba(40, 40, 68, 0.85);
  --bg-glass: rgba(26, 26, 46, 0.55);
  --bg-glass-border: rgba(255, 255, 255, 0.08);
  --text-primary: #f0f0f5;
  --text-secondary: #b8b8cc;
  --text-muted: #8888a0;
  --accent: #e94560;
  --accent-hover: #ff5c78;
  --accent-soft: rgba(233, 69, 96, 0.15);
  --accent-glow: rgba(233, 69, 96, 0.4);
  --gold: #f5c542;
  --gold-soft: rgba(245, 197, 66, 0.15);
  --purple: #7b5ea7;
  --purple-soft: rgba(123, 94, 167, 0.15);
  --cyan: #4ecdc4;
  --cyan-soft: rgba(78, 205, 196, 0.12);
  --border: rgba(255, 255, 255, 0.07);
  --border-hover: rgba(233, 69, 96, 0.35);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 32px rgba(233, 69, 96, 0.25);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 999px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;
  --max-width: 1180px;
  --header-height: 68px;
  --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: 0.55s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-primary: #f4f4f8;
    --bg-secondary: #ffffff;
    --bg-tertiary: #eeeef4;
    --bg-card: rgba(255, 255, 255, 0.78);
    --bg-card-hover: rgba(255, 255, 255, 0.95);
    --bg-glass: rgba(255, 255, 255, 0.6);
    --bg-glass-border: rgba(0, 0, 0, 0.06);
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a62;
    --text-muted: #8888a0;
    --accent: #d63050;
    --accent-hover: #e94560;
    --accent-soft: rgba(214, 48, 80, 0.1);
    --accent-glow: rgba(214, 48, 80, 0.25);
    --gold: #d4a017;
    --gold-soft: rgba(212, 160, 23, 0.12);
    --purple: #6b4d97;
    --purple-soft: rgba(107, 77, 151, 0.1);
    --cyan: #2ba89f;
    --cyan-soft: rgba(43, 168, 159, 0.1);
    --border: rgba(0, 0, 0, 0.07);
    --border-hover: rgba(214, 48, 80, 0.3);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.09);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 32px rgba(214, 48, 80, 0.15);
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 80% 60% at 10% 0%, rgba(123, 94, 167, 0.12), transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 20%, rgba(233, 69, 96, 0.1), transparent 55%),
    radial-gradient(ellipse 70% 50% at 50% 100%, rgba(78, 205, 196, 0.06), transparent 60%);
  pointer-events: none;
}

@media (prefers-color-scheme: light) {
  body::before {
    background:
      radial-gradient(ellipse 80% 60% at 10% 0%, rgba(107, 77, 151, 0.06), transparent 60%),
      radial-gradient(ellipse 60% 50% at 90% 20%, rgba(214, 48, 80, 0.05), transparent 55%),
      radial-gradient(ellipse 70% 50% at 50% 100%, rgba(43, 168, 159, 0.04), transparent 60%);
  }
}

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

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

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

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

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

ul,
ol {
  padding-left: 1.4em;
}

li {
  margin-bottom: 0.35em;
}

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

h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); margin-bottom: 0.6em; }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); margin-bottom: 0.55em; margin-top: 0.2em; }
h3 { font-size: clamp(1.15rem, 2.2vw, 1.45rem); margin-bottom: 0.5em; margin-top: 1.2em; }
h4 { font-size: clamp(1rem, 1.8vw, 1.2rem); margin-bottom: 0.45em; margin-top: 1em; }

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

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

blockquote {
  border-left: 3px solid var(--accent);
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1em 1.4em;
  margin: 1.2em 0;
  color: var(--text-secondary);
  font-style: normal;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

blockquote::before {
  content: "\201C";
  position: absolute;
  top: -0.15em;
  left: 0.3em;
  font-size: 3.5em;
  color: var(--accent);
  opacity: 0.15;
  font-family: Georgia, serif;
  line-height: 1;
}

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

blockquote p {
  margin-bottom: 0;
  position: relative;
  z-index: 1;
}

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

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;
}

/* ===== HEADER ===== */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid var(--bg-glass-border);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

#site-header::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-glow), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

#site-header:hover::after {
  opacity: 1;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.logo:hover {
  transform: scale(1.03);
  color: var(--text-primary);
}

.logo svg {
  border-radius: 10px;
  box-shadow: 0 0 16px var(--accent-glow);
  transition: box-shadow var(--transition-base);
}

.logo:hover svg {
  box-shadow: 0 0 28px var(--accent-glow);
}

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

#site-header nav ul {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 4px;
}

#site-header nav li {
  margin: 0;
}

#site-header nav a {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast);
}

#site-header nav a::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width var(--transition-base);
}

#site-header nav a:hover {
  color: var(--text-primary);
  background: var(--accent-soft);
}

#site-header nav a:hover::after {
  width: 40%;
}

#site-header form[role="search"] {
  display: flex;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  overflow: hidden;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

#site-header form[role="search"]:focus-within {
  border-color: var(--border-hover);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

#site-header input[type="search"] {
  border: none;
  background: transparent;
  padding: 9px 16px;
  color: var(--text-primary);
  font-size: 0.88rem;
  font-family: inherit;
  width: 180px;
  outline: none;
  transition: width var(--transition-base);
}

#site-header input[type="search"]::placeholder {
  color: var(--text-muted);
}

#site-header input[type="search"]:focus {
  width: 220px;
}

#site-header button[type="submit"] {
  border: none;
  background: var(--accent);
  color: #fff;
  padding: 9px 18px;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

#site-header button[type="submit"]:hover {
  background: var(--accent-hover);
}

#site-header button[type="submit"]:active {
  transform: scale(0.96);
}

/* ===== BREADCRUMB ===== */
nav[aria-label="面包屑导航"] {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 24px 0;
}

nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 6px;
  font-size: 0.82rem;
}

nav[aria-label="面包屑导航"] li {
  margin: 0;
  color: var(--text-muted);
  display: flex;
  align-items: center;
}

nav[aria-label="面包屑导航"] li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--text-muted);
  opacity: 0.5;
}

nav[aria-label="面包屑导航"] a {
  color: var(--text-muted);
}

nav[aria-label="面包屑导航"] a:hover {
  color: var(--accent);
}

nav[aria-label="面包屑导航"] [aria-current="page"] {
  color: var(--accent);
  font-weight: 600;
}

/* ===== MAIN ===== */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 60px;
}

main > section {
  margin-top: 48px;
  padding: 36px 32px;
  background: var(--bg-card);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
  position: relative;
  overflow: hidden;
}

main > section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.12), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

main > section:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-hover);
}

main > section:hover::before {
  opacity: 1;
}

main > section > h2 {
  position: relative;
  padding-bottom: 0.5em;
}

main > section > h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 56px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), var(--purple));
}

/* ===== HERO ===== */
#hero {
  margin-top: 28px;
  padding: 0;
  background: linear-gradient(135deg, #1a1a2e 0%, #2d1b3d 35%, #3d1f35 60%, #e94560 100%);
  border: none;
  overflow: hidden;
  position: relative;
}

#hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 15%, rgba(245, 197, 66, 0.18), transparent 40%),
    radial-gradient(circle at 15% 85%, rgba(123, 94, 167, 0.25), transparent 45%);
  pointer-events: none;
}

#hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Ccircle cx='30' cy='30' r='1'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

#hero > * {
  position: relative;
  z-index: 1;
}

#hero h1 {
  padding: 40px 40px 0;
  color: #fff;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
  font-size: clamp(1.6rem, 4.5vw, 2.6rem);
  line-height: 1.25;
}

#hero > p {
  padding: 0 40px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.98rem;
  max-width: 780px;
}

#hero > p:first-of-type {
  margin-top: 1em;
}

#hero > div {
  padding: 0 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 1.6em;
}

#hero > div a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
  position: relative;
  overflow: hidden;
}

#hero > div a:first-child {
  background: #fff;
  color: #1a1a2e;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

#hero > div a:first-child:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  color: #1a1a2e;
}

#hero > div a:last-child {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

#hero > div a:last-child:hover {
  background: rgba(255, 255, 255, 0.22);
  transform: translateY(-3px);
  color: #fff;
}

#hero figure {
  margin: 32px 40px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

#hero figure:hover {
  transform: scale(1.015) translateY(-4px);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.5);
}

#hero figure svg {
  width: 100%;
  display: block;
}

#hero figcaption {
  padding: 12px 20px;
  background: rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.82rem;
  text-align: center;
}

#hero ul {
  list-style: none;
  padding: 32px 40px 40px;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

#hero ul li {
  margin: 0;
  padding: 18px 16px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  text-align: center;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.85rem;
  transition: transform var(--transition-base), background var(--transition-base), border-color var(--transition-base);
}

#hero ul li:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.25);
}

#hero ul li strong {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 4px;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff, #f5c542);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ===== NEWS ARTICLES ===== */
#news article {
  padding: 22px 24px;
  margin-bottom: 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background var(--transition-base);
  position: relative;
  overflow: hidden;
}

#news article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--accent), var(--purple));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-base);
}

#news article:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

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

#news article h3 {
  margin-top: 0;
  margin-bottom: 0.3em;
}

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

#news article h3 a:hover {
  color: var(--accent);
}

#news article p {
  margin-bottom: 0.5em;
  font-size: 0.92rem;
}

#news article > a:last-child {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  transition: gap var(--transition-fast);
}

#news article > a:last-child::after {
  content: "\2192";
  transition: transform var(--transition-fast);
}

#news article > a:last-child:hover {
  gap: 8px;
}

#news article > a:last-child:hover::after {
  transform: translateX(2px);
}

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

#faq details:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
}

#faq details[open] {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
  background: var(--bg-card-hover);
}

#faq summary {
  padding: 16px 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: color var(--transition-fast), background var(--transition-fast);
  position: relative;
}

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

#faq summary::after {
  content: "+";
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1;
  transition: transform var(--transition-base), background var(--transition-base), color var(--transition-base);
}

#faq details[open] summary::after {
  content: "\2212";
  transform: rotate(180deg);
  background: var(--accent);
  color: #fff;
}

#faq summary:hover {
  color: var(--accent);
}

#faq details p {
  padding: 0 20px 18px;
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-secondary);
  animation: fadeSlideDown 0.35s ease;
}

@keyframes fadeSlideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== HOWTO ===== */
#howto ol {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 1.2em 0;
}

#howto ol li {
  counter-increment: step;
  position: relative;
  padding: 16px 20px 16px 64px;
  margin-bottom: 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  font-size: 0.93rem;
  color: var(--text-secondary);
}

#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  box-shadow: 0 4px 12px var(--accent-glow);
}

#howto ol li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-hover);
}

#howto ul {
  list-style: none;
  padding: 0;
  margin: 1em 0;
}

#howto ul li {
  position: relative;
  padding: 10px 16px 10px 40px;
  margin-bottom: 8px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  color: var(--text-secondary);
  transition: transform var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

#howto ul li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

#howto ul li:hover {
  transform: translateX(4px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

/* ===== SITEMAP & LINKS ===== */
#sitemap ul,
#links ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
}

#sitemap li,
#links li {
  margin: 0;
}

#sitemap a,
#links a {
  display: block;
  padding: 12px 18px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: transform var(--transition-base), border-color var(--transition-base), background var(--transition-base), color var(--transition-base), box-shadow var(--transition-base);
}

#sitemap a:hover,
#links a:hover {
  transform: translateY(-3px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  color: var(--accent);
  box-shadow: var(--shadow-sm);
}

/* ===== CONTACT ===== */
#contact address p {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
  font-size: 0.93rem;
  transition: padding-left var(--transition-fast);
}

#contact address p:last-child {
  border-bottom: none;
}

#contact address p:hover {
  padding-left: 8px;
}

#contact address a {
  color: var(--accent);
  font-weight: 500;
  border-bottom: 1px dashed transparent;
  transition: border-color var(--transition-fast);
}

#contact address a:hover {
  border-bottom-color: var(--accent);
}

/* ===== EDITORIAL ===== */
#editorial p {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
  font-size: 0.92rem;
}

#editorial p:last-child {
  border-bottom: none;
}

/* ===== FOOTER ===== */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 48px 24px 32px;
  margin-top: 48px;
  position: relative;
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-glow), transparent);
}

footer > section {
  max-width: var(--max-width);
  margin: 0 auto 28px;
}

footer > section h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5em;
  margin-top: 0;
  letter-spacing: 0.02em;
}

footer > section p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 0.6em;
}

footer nav[aria-label="页脚导航"] {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

footer nav[aria-label="页脚导航"] ul {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 8px 24px;
}

footer nav[aria-label="页脚导航"] li {
  margin: 0;
}

footer nav[aria-label="页脚导航"] a {
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: color var(--transition-fast);
}

footer nav[aria-label="页脚导航"] a:hover {
  color: var(--accent);
}

/* ===== BACK TO TOP ===== */
body > a[href="#site-header"] {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 999;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0;
  box-shadow: 0 6px 24px var(--accent-glow);
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
  opacity: 0;
  visibility: hidden;
  text-decoration: none;
}

body > a[href="#site-header"]::before {
  content: "\2191";
  font-size: 1.3rem;
  line-height: 1;
  font-weight: 700;
}

body > a[href="#site-header"]:hover {
  transform: translateY(-4px) scale(1.08);
  background: var(--accent-hover);
  box-shadow: 0 10px 36px var(--accent-glow);
  color: #fff;
}

/* ===== SCROLL ANIMATIONS ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.94);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

main > section {
  animation: fadeInUp 0.7s ease both;
}

main > section:nth-child(1) { animation-delay: 0.05s; }
main > section:nth-child(2) { animation-delay: 0.1s; }
main > section:nth-child(3) { animation-delay: 0.15s; }
main > section:nth-child(4) { animation-delay: 0.2s; }
main > section:nth-child(5) { animation-delay: 0.25s; }
main > section:nth-child(6) { animation-delay: 0.3s; }
main > section:nth-child(7) { animation-delay: 0.35s; }
main > section:nth-child(8) { animation-delay: 0.4s; }
main > section:nth-child(9) { animation-delay: 0.45s; }
main > section:nth-child(10) { animation-delay: 0.5s; }
main > section:nth-child(11) { animation-delay: 0.55s; }
main > section:nth-child(12) { animation-delay: 0.6s; }
main > section:nth-child(13) { animation-delay: 0.65s; }

@supports (animation-timeline: view()) {
  main > section {
    animation: fadeInUp 0.8s ease both;
    animation-timeline: view();
    animation-range: entry 0% entry 30%;
  }
}

@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;
  }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .header-inner {
    gap: 16px;
  }

  #site-header nav a {
    padding: 8px 10px;
    font-size: 0.85rem;
  }

  #site-header input[type="search"] {
    width: 140px;
  }

  #site-header input[type="search"]:focus {
    width: 170px;
  }

  #hero ul {
    grid-template-columns: repeat(2, 1fr);
  }

  main > section {
    padding: 28px 24px;
  }

  #hero h1,
  #hero > p,
  #hero > div {
    padding-left: 28px;
    padding-right: 28px;
  }

  #hero figure {
    margin-left: 28px;
    margin-right: 28px;
  }

  #hero ul {
    padding-left: 28px;
    padding-right: 28px;
  }
}

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

  body {
    font-size: 15px;
  }

  .header-inner {
    flex-wrap: wrap;
    padding: 12px 16px;
    gap: 10px;
    height: auto;
  }

  #site-header nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 4px;
  }

  #site-header nav::-webkit-scrollbar {
    display: none;
  }

  #site-header nav ul {
    gap: 2px;
    padding: 0 2px;
  }

  #site-header nav a {
    padding: 7px 12px;
    font-size: 0.82rem;
  }

  #site-header form[role="search"] {
    margin-left: auto;
  }

  #site-header input[type="search"] {
    width: 110px;
    padding: 8px 12px;
    font-size: 0.82rem;
  }

  #site-header input[type="search"]:focus {
    width: 140px;
  }

  #site-header button[type="submit"] {
    padding: 8px 14px;
    font-size: 0.8rem;
  }

  nav[aria-label="面包屑导航"] {
    padding: 10px 16px 0;
  }

  main {
    padding: 0 16px 40px;
  }

  main > section {
    margin-top: 28px;
    padding: 22px 18px;
    border-radius: var(--radius-lg);
  }

  #hero {
    margin-top: 16px;
    padding: 0;
  }

  #hero h1 {
    padding: 28px 20px 0;
    font-size: 1.5rem;
  }

  #hero > p {
    padding: 0 20px;
    font-size: 0.9rem;
  }

  #hero > div {
    padding: 0 20px;
    gap: 10px;
  }

  #hero > div a {
    padding: 11px 22px;
    font-size: 0.88rem;
    flex: 1 1 auto;
    text-align: center;
  }

  #hero figure {
    margin: 24px 20px 0;
    border-radius: var(--radius-md);
  }

  #hero ul {
    padding: 24px 20px 28px;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  #hero ul li {
    padding: 14px 10px;
    font-size: 0.78rem;
  }

  #hero ul li strong {
    font-size: 1.3rem;
  }

  #sitemap ul,
  #links ul {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 8px;
  }

  #sitemap a,
  #links a {
    padding: 10px 14px;
    font-size: 0.85rem;
  }

  #howto ol li {
    padding: 14px 16px 14px 56px;
    font-size: 0.88rem;
  }

  #howto ol li::before {
    left: 14px;
    width: 28px;
    height: 28px;
    font-size: 0.78rem;
  }

  footer {
    padding: 36px 16px 24px;
  }

  body > a[href="#site-header"] {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 480px) {
  #site-header form[role="search"] {
    flex: 1;
  }

  #site-header input[type="search"] {
    width: 100%;
    flex: 1;
  }

  #site-header input[type="search"]:focus {
    width: 100%;
  }

  #hero h1 {
    font-size: 1.3rem;
    padding: 22px 16px 0;
  }

  #hero > p {
    padding: 0 16px;
    font-size: 0.86rem;
  }

  #hero > div {
    padding: 0 16px;
    flex-direction: column;
  }

  #hero > div a {
    width: 100%;
  }

  #hero figure {
    margin: 20px 16px 0;
  }

  #hero ul {
    padding: 20px 16px 24px;
    grid-template-columns: repeat(2, 1fr);
  }

  #hero ul li strong {
    font-size: 1.15rem;
  }

  main > section {
    padding: 18px 14px;
  }

  #news article {
    padding: 16px 16px;
  }

  #sitemap ul,
  #links ul {
    grid-template-columns: 1fr 1fr;
  }

  #faq summary {
    padding: 14px 16px;
    font-size: 0.88rem;
  }

  #faq details p {
    padding: 0 16px 14px;
    font-size: 0.86rem;
  }
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent), var(--purple));
  border-radius: 10px;
  border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--accent-hover), var(--purple));
}

/* ===== PRINT ===== */
@media print {
  #site-header,
  body > a[href="#site-header"],
  #site-header form[role="search"] {
    display: none;
  }

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

  main > section {
    box-shadow: none;
    border: 1px solid #ddd;
    break-inside: avoid;
  }
}